JP7546887B2 - Handle lever attachment/detachment device - Google Patents

Description

The present invention relates to a handle lever attachment/detachment device for attaching and detaching a handle lever to and from a valve box of a butterfly valve having a valve body and a handle lever for operating the valve body.

In industrial (sanitary) fields such as food, beverage, cosmetics, pharmaceuticals, and brewing, manufacturing facilities are equipped with piping to carry the fluids (such as gases, liquids, or mixtures of these with solids) used in the facilities. Valves are installed along the piping to control the fluids.

Of the many different types of valves available, butterfly valves are widely used in the above fields because they can be disassembled, cleaned, and reassembled, and can be used on pipes of various diameters.

The butterfly valve described in Patent Document 1 includes a valve box connected to a pipe and having a fluid flow path therein through which a fluid passes, a valve element provided on the valve box so as to be rotatable around a rotation axis extending in a direction intersecting the fluid flow path inside the valve box between a closed position for closing the inside of the valve box and an open position for opening the inside of the valve box, an elastic valve seat ring (seat ring) that seals between the valve box and the valve element in the closed position, and a valve element operating unit that is attached to the valve box and operates the valve element to switch between the open position and the closed position of the valve element. The valve element operating unit has a valve element connecting unit that is connected to the valve element and enables the valve element to be rotated between the open position and the closed position, and a drive lever handle (handle lever) that receives an operating force around the rotation axis and can rotate the valve element via the valve element connecting unit around the rotation axis.

Japanese Patent Application Publication No. 04-357374

Also known is a valve body operating unit that includes a pin for attaching the handle lever to the valve body connecting part in a state in which the handle lever can rotate about a second rotation axis extending in a direction perpendicular to the rotation axis relative to the valve body connecting part between a restricting position that restricts rotation of the handle lever about the rotation axis and an allowing position that allows the rotation. In such a valve body operating unit, the valve body connecting part has a pair of support pieces that are arranged to sandwich the handle lever, and the pin is inserted into both support pieces and the handle lever so as to pass through both support pieces and the handle lever.

When performing maintenance on a butterfly valve, the handle lever may need to be removed from the valve body connection part. To remove the handle lever, the pin must be removed from the valve body connection part and the handle lever hole.

Conventionally, to extract a pin, one end of a punch, which has roughly the same diameter as the pin, is pressed against the end of the pin, and the other end of the punch is struck with a hammer.

Similarly, when inserting the pin, one end of the pin is pressed against the hole to attach the handle lever, one end of the punch is then pressed against the other end of the pin, and the other end of the punch is struck with a hammer.

When installing or removing the handle lever of a butterfly valve, the conventional method of striking the pin with a hammer via a punch posed the risk of the pin flying off and being lost, or of the worker being hit in the hand with the hammer.

The object of the present invention is to provide a handle lever attachment/detachment device for a butterfly valve that allows the handle lever of a butterfly valve to be attached and detached safely and easily.

A handle lever attachment/detachment device according to one aspect of the present invention includes a valve box having a fluid flow path therein, a valve element provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve box between an open position for opening the fluid flow path and a closed position for closing the fluid flow path, a valve element connection part attached to the valve box so as to be rotatable about the first rotation axis while being connected to the valve element, a handle lever connected to the valve element connection part so as to rotate the valve element connection part about the first rotation axis by receiving an operating force about the first rotation axis, and a restricting position restricting the rotation of the handle lever about the first rotation axis. a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a first position and an allowable position that allows the rotation, the through pin being inserted into the valve body connecting part and the handle lever and removed from the valve body connecting part and the handle lever, a holding portion that holds one of a pair of support pieces; a pin press-in portion having a thickness that allows insertion into holes for fitting the through pin that are provided in the valve body connecting portion and the handle lever; and a connecting mechanism that connects the pin press-in portion and the holding portion to each other such that the pin press-in portion can be moved toward and away from the holding portion in the direction in which the second rotation shaft extends when one of the pair of support pieces is held by a predetermined operation, wherein a notch that allows movement of the through pin in the direction in which the second rotation shaft extends is formed in the holding portion at a position facing the pin press-in portion in the direction in which the second rotation shaft extends , and the pin press-in portion has a length equal to or greater than the depth of the hole, The connecting mechanism has a threaded hole portion in which a threaded hole extending in the direction of extension of the second rotation shaft, a main body portion in which the holding portion and the threaded hole portion are connected with a gap between each other, a threaded portion that screws into the threaded hole of the threaded hole portion and has the pin press-in portion connected to it, and a threaded portion rotation handle that is connected to the threaded portion and can rotate the threaded portion around the second rotation shaft, and the threaded portion that screws into the threaded hole of the threaded hole portion is rotated by the rotational force applied to the threaded portion rotation handle, and the rotation of the threaded portion is converted by the threaded hole portion into movement of the pin press-in portion in the direction of extension of the second rotation shaft, generating a pressing force in the direction of extension of the second rotation shaft .

The handle lever attachment/detachment device allows the pin press-in portion to be positioned opposite the end face of the through pin in the direction in which the second rotation shaft extends, sandwiching the valve body connection portion and the handle lever, while one of the pair of support pieces of the valve body connection portion is held by the holding portion. In this state, by applying a predetermined operation to the connection mechanism, the pin press-in portion moves toward and away from the holding portion in the direction in which the second rotation shaft extends, allowing the through pin to be inserted and removed.

Here, if the through pin has already been inserted into the hole for inserting the through pin provided in the valve body connection part and the handle lever, as the pin press-in part approaches the holding part, the pin press-in part is inserted into the hole, and the through pin is pressed toward the holding part. Then, a notch that allows the through pin to move in the direction in which the second rotation shaft extends is formed in the holding part at a position facing the pin press-in part in the extension direction of the second rotation shaft, so that the through pin pushed out of the hole by the pin press-in part can be guided into the notch. This allows the through pin to be pulled out of the hole, i.e., the valve body connection part and the handle lever, and the handle lever can be removed from the valve body connection part. Therefore, according to the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily removed by operating the connection mechanism.

On the other hand, when the through pin is positioned in the hole into which it is not inserted, the through pin is pressed into the hole as the pin press-in portion approaches the retaining portion. This causes the handle lever to be attached to the valve body connecting portion. Therefore, with the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily attached by operating the connecting mechanism.

Furthermore, according to the handle lever attachment/detachment device, the pin press-in portion has a length greater than or equal to the depth of the hole, so that by pressing the through pin until the pin press-in portion is completely inserted into the hole, the through pin can be reliably removed from the hole.

Furthermore, according to the handle lever attachment/detachment device, the connecting mechanism can convert the rotational force applied to the threaded portion rotating handle into a pressing force in the direction in which the second rotating shaft extends. The pin press-fitting portion connected to the threaded portion of the connecting mechanism is applied with a pressing force in the direction in which the second rotating shaft extends.

A handle lever attachment/detachment device according to another aspect of the present invention includes a valve box having a fluid flow path therein, a valve body provided on the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve box between an open position for opening the fluid flow path and a closed position for closing the fluid flow path, a valve body connecting part attached to the valve box so as to be rotatable about the first rotation axis while being connected to the valve body, and a valve body connecting part connected to the valve body so as to rotate about the first rotation axis when it receives an operating force about the first rotation axis. a pair of support pieces of the valve body connecting part sandwiching the handle lever in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation, and a through pin that is fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, a valve body connecting portion and a handle lever connecting/removing portion for connecting or removing the handle lever by inserting and removing the valve body connecting portion and the handle lever, the valve body connecting portion and the handle lever being configured to include a holding portion for holding one of the pair of support pieces from one side in the direction in which the second rotation shaft extends, and a pin press-fitting portion having a thickness capable of being inserted into a hole for fitting the through pin provided in the valve body connecting portion and the handle lever, the pin press-fitting portion being capable of being moved toward or away from the holding portion in the direction in which the second rotation shaft extends by receiving a predetermined operation while holding one of the pair of support pieces. and a connecting mechanism connecting the pin press-in portion and the holding portion to each other so as to allow the through pin to move in the direction in which the second rotation shaft extends, wherein a notch is formed in the holding portion at a position facing the pin press-in portion and the direction in which the second rotation shaft extends, the pin press-in portion has a length equal to or greater than the depth of the hole, and the pin press-in portion has a pressing portion for pressing the through pin, and a protrusion that protrudes from a tip of the pressing portion and has a diameter smaller than that of the pressing portion so as to be insertable into a positioning hole formed in an end face of the through pin.
According to the handle lever attachment/detachment device, with one of the pair of support pieces of the valve body connecting part being held by the holding part, it is possible to dispose the pin press-in part in a position facing the end face of the through pin in the extension direction of the second rotation shaft, sandwiching the valve body connecting part and the handle lever. In this state, by applying a predetermined operation to the connecting mechanism, the pin press-in part moves toward and away from the holding part in the extension direction of the second rotation shaft, thereby allowing the through pin to be inserted and removed.
Here, if the through pin has already been inserted into the hole for inserting the through pin provided in the valve body connecting part and the handle lever, as the pin press-in part approaches the holding part, the pin press-in part is inserted into the hole, thereby pressing the through pin toward the holding part. In addition, a notch that allows the through pin to move in the direction in which the second rotation shaft extends is formed in the holding part at a position facing the pin press-in part in the direction in which the second rotation shaft extends, so that the through pin pushed out of the hole by the pin press-in part can be guided into the notch. This allows the through pin to be pulled out of the hole, i.e., the valve body connecting part and the handle lever, and the handle lever to be removed from the valve body connecting part. Therefore, according to the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily removed by operating the connection mechanism.
On the other hand, when the through pin is positioned in the hole into which the through pin is not inserted, the through pin is pressed into the hole as the pin press-fit portion approaches the retaining portion. This causes the handle lever to be attached to the valve body connecting portion. Therefore, with the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily attached by operating the connecting mechanism.
Furthermore, according to the handle lever attachment/detachment device, the pin press-in portion has a length greater than or equal to the depth of the hole, so that by pressing the through pin until the pin press-in portion is completely inserted into the hole, the through pin can be reliably removed from the hole.

According to the handle lever attachment/detachment device, the protruding portion of the pin press-in portion is inserted into the positioning hole in the end face of the through pin, so that the protruding portion prevents the pin press-in portion from shifting from the end face of the through pin, and the pressing portion can press the through pin.

In a preferred embodiment of the handle lever attachment/detachment device, the handle lever attachment/detachment device further includes a second pin press-in portion that is different from the pin press-in portion in at least one of thickness and length, and the connecting mechanism further includes a nut portion that can be screwed onto the threaded portion so that the pin press-in portion can be selectively attached and detached.

The handle lever attachment/detachment device allows the pin press-in portion to be attached and detached to the threaded portion by the nut portion. The through pin may have a different thickness or length for each butterfly valve, and the pin press-in portion should be replaced with one having a thickness or length that corresponds to the through pin that is the object to be pressed, and used in the handle lever attachment/detachment device. Therefore, the handle lever attachment/detachment device allows the pin press-in portion to be easily replaced with a second pin press-in portion.

The handle lever attachment/detachment device according to another aspect of the present invention includes a valve box having a fluid flow path therein, a valve body provided on the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve box between an open position for opening the fluid flow path and a closed position for closing the fluid flow path, a valve body connection part attached to the valve box so as to be rotatable about the first rotation axis in a state connected to the valve body, a handle lever connected to the valve body connection part so as to rotate the valve body connection part about the first rotation axis in response to an operating force about the first rotation axis, and a pair of support pieces of the valve body connection part sandwiching the handle lever and a pair of support pieces and a pair of support pieces inserted into the handle lever so as to penetrate the handle lever in order to attach the handle lever to the valve body connection part so that the handle lever can rotate relative to the valve body connection part about a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts the rotation of the handle lever about the first rotation axis and an allowing position that allows the rotation. a through pin provided in the valve body connecting portion and the handle lever, and a handle lever attaching/detaching device for attaching or detaching the handle lever by inserting and removing the through pin into and from the valve body connecting portion and the handle lever in a butterfly valve having the valve body connecting portion and the handle lever, the handle lever attaching/detaching device including a holding portion that holds one of the pair of support pieces from one side in the direction in which the second rotation shaft extends, a pin press-fitting portion having a thickness that allows it to be inserted into holes for fitting the through pin provided in the valve body connecting portion and the handle lever, and a pin press-fitting portion that holds one of the pair of support pieces by receiving a predetermined operation. and a connecting mechanism connecting the pin press-in portion and the holding portion to each other so that the pin press-in portion can be moved toward and away from the holding portion in the direction in which the second rotation shaft extends, wherein a notch is formed in the holding portion at a position opposite the pin press-in portion in the direction in which the second rotation shaft extends, and the holding portion has a contact surface capable of surface contact with one of the pair of support pieces, and an inclined surface extending from the contact surface toward the notch and inclined with respect to the second rotation shaft.
According to the handle lever attachment/detachment device, with one of the pair of support pieces of the valve body connecting part being held by the holding part, it is possible to dispose the pin press-in part in a position facing the end face of the through pin in the extension direction of the second rotation shaft, sandwiching the valve body connecting part and the handle lever. In this state, by applying a predetermined operation to the connecting mechanism, the pin press-in part moves toward and away from the holding part in the extension direction of the second rotation shaft, thereby allowing the through pin to be inserted and removed.
Here, if the through pin has already been inserted into the hole for inserting the through pin provided in the valve body connecting part and the handle lever, as the pin press-in part approaches the holding part, the pin press-in part is inserted into the hole, thereby pressing the through pin toward the holding part. In addition, a notch that allows the through pin to move in the direction in which the second rotation shaft extends is formed in the holding part at a position facing the pin press-in part in the direction in which the second rotation shaft extends, so that the through pin pushed out of the hole by the pin press-in part can be guided into the notch. This allows the through pin to be pulled out of the hole, i.e., the valve body connecting part and the handle lever, and the handle lever to be removed from the valve body connecting part. Therefore, according to the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily removed by operating the connection mechanism.
On the other hand, when the through pin is positioned in the hole into which the through pin is not inserted, the through pin is pressed into the hole as the pin press-fitting portion approaches the retaining portion. This causes the handle lever to be attached to the valve body connecting portion. Therefore, with the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily attached by operating the connecting mechanism.

The through pin, which is pushed out in the direction of the extension of the second rotation shaft from the hole provided in the valve body connection part of the butterfly valve and the handle lever by the pin press-fitting part of the handle lever attachment/detachment device, is allowed to move in the direction of the extension of the second rotation shaft by the notch in the holding part. At this time, even if the through pin is pushed out deviating from the position of the notch toward the contact surface, the handle lever attachment/detachment device guides the through pin to the inclined surface that extends from the contact surface toward the notch and is inclined with respect to the second rotation shaft, and moves into the notch in the holding part, allowing the worker to continue the work of removing the through pin. Therefore, the handle lever attachment/detachment device can improve the workability of the work of removing the through pin.

The handle lever attachment/detachment device according to another aspect of the present invention includes a valve box having a fluid flow path therein, a valve body provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve box between an open position for opening the fluid flow path and a closed position for closing the fluid flow path, a valve body connecting part attached to the valve box so as to be rotatable about the first rotation axis while being connected to the valve body, a handle lever connected to the valve body connecting part so as to rotate the valve body connecting part about the first rotation axis by receiving an operating force about the first rotation axis, and a front a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation, a pin press-fitting portion having a thickness capable of being inserted into a hole for fitting the through pin provided in the valve body connecting portion and the handle lever; and a connecting mechanism connecting the pin press-fitting portion and the holding portion to each other such that the pin press-fitting portion can be moved toward or away from the holding portion in the direction of extension of the second rotation shaft when one of the pair of support pieces is held by a predetermined operation. The present invention further includes a positioning member having an insertable portion that can be inserted into a positioning hole formed in an end face of the through pin, the positioning member having a notch formed at a position opposite the pin press-in portion in the direction in which the second rotation shaft extends, the notch allowing the through pin to move in the direction in which the second rotation shaft extends, and a movable connecting mechanism that connects the positioning member to the connecting mechanism so that the positioning member faces the pin press-in portion in the direction in which the second rotation shaft extends and the positioning member receives a pressing force from the pin press-in portion via the through pin, thereby allowing the positioning member to move in a direction away from the support piece .
According to the handle lever attachment/detachment device, with one of the pair of support pieces of the valve body connecting part being held by the holding part, it is possible to dispose the pin press-in part in a position facing the end face of the through pin in the extension direction of the second rotation shaft, sandwiching the valve body connecting part and the handle lever. In this state, by applying a predetermined operation to the connecting mechanism, the pin press-in part moves toward and away from the holding part in the extension direction of the second rotation shaft, thereby allowing the through pin to be inserted and removed.
Here, if the through pin has already been inserted into the hole for inserting the through pin provided in the valve body connecting part and the handle lever, as the pin press-in part approaches the holding part, the pin press-in part is inserted into the hole, thereby pressing the through pin toward the holding part. In addition, a notch that allows the through pin to move in the direction in which the second rotation shaft extends is formed in the holding part at a position facing the pin press-in part in the direction in which the second rotation shaft extends, so that the through pin pushed out of the hole by the pin press-in part can be guided into the notch. This allows the through pin to be pulled out of the hole, i.e., the valve body connecting part and the handle lever, and the handle lever to be removed from the valve body connecting part. Therefore, according to the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily removed by operating the connection mechanism.
On the other hand, when the through pin is positioned in the hole into which the through pin is not inserted, the through pin is pressed into the hole as the pin press-fit portion approaches the retaining portion. This causes the handle lever to be attached to the valve body connecting portion. Therefore, with the handle lever attachment/detachment device, the handle lever in the butterfly valve can be safely and easily attached by operating the connecting mechanism.

The handle lever attachment/detachment device can be positioned relative to the through pin by inserting the inserted portion of the positioning member into the hole of the through pin.

Furthermore, the movable connecting mechanism allows the positioning member to move in a direction away from the support piece of the valve body connecting portion by receiving a pressing force from the pin press-in portion via the through pin, thereby allowing the through pin to move toward the holding portion. Therefore, the handle lever attachment/detachment device allows the through pin to move in the direction in which the second rotation axis extends while maintaining the relative positioning of the through pin and the valve body connecting portion, and the handle lever and the holding portion of the handle lever attachment/detachment device.

The handle lever attachment/detachment device may be such that the positioning member has a thickness that allows it to be inserted into the holes for inserting the through pin provided in the valve body connection portion and the handle lever.

According to the handle lever attachment/detachment device, when the through pin is inserted into the hole provided in the valve body connection part and the handle lever, a positioning member having a thickness that can be inserted into the hole is inserted into the hole in advance, so that the handle lever attachment/detachment device is positioned relative to the valve body connection part and the handle lever. In this state, the inserted part of the positioning member is inserted into the positioning hole formed on the end face of the through pin, so that the through pin is positioned relative to the handle lever attachment/detachment device. As a result, the through pin, the valve body connection part, the handle lever, and the handle lever attachment/detachment device are positioned relative to each other, and in this state, the pin press-in part moves relative to the holding part of the handle lever attachment/detachment device in the direction in which the second rotation axis extends, so that the through pin can be inserted into the hole provided in the valve body connection part and the handle lever without being misaligned. Furthermore, at this time, the movable connection mechanism allows the positioning member to receive the pressing force from the pin press-in part via the through pin, so that the positioning member moves in a direction away from the support piece of the valve body connection part, thereby allowing the movement of the through pin approaching the holding part. Therefore, with the handle lever attachment/detachment device, the through pin can be inserted while maintaining the relative positioning of the through pin and the valve body connection portion, and the handle lever and the holding portion of the handle lever attachment/detachment device.

Therefore, the handle lever attachment/detachment device of the present invention allows the handle lever to be attached and detached safely and easily in a butterfly valve.

FIG. 2 is a side cross-sectional view of a butterfly valve. FIG. 2 is a plan view of the butterfly valve. 3 is a cross-sectional view taken along line III-III in FIG. 1. 4 is a cross-sectional view showing a state in which a handle lever is disposed in an allowable position in a butterfly valve, allowing the handle lever to rotate about a first rotation axis. FIG. 1A and 1B are diagrams showing a handle lever attachment/detachment device according to an embodiment of the present invention, in which FIG. 1 is a diagram showing a state in which a handle lever attachment/detachment device according to an embodiment of the present invention is attached to a butterfly valve so that the handle lever attachment/detachment device can extract a through pin inserted in the butterfly valve. FIG. 1 is a diagram showing a state immediately after the handle lever attachment/detachment device according to the embodiment of the present invention has extracted a through pin that has been fitted into a butterfly valve. FIG. 1 is a diagram showing a state in which the handle lever attachment/detachment device, the butterfly valve, and the through pin are respectively arranged so that the handle lever attachment/detachment device according to an embodiment of the present invention can fit the through pin into the butterfly valve. FIG. 1A and 1B are diagrams showing the connection form between the pin press-in portion and the screw portion of a handle lever attachment/detachment device according to an embodiment of the present invention, modified examples of the pin press-in portion, and a nut portion, in which (a) is a diagram showing a state in which the pin press-in portion and the screw portion of a first modified example are connected to each other by the nut portion, (b) is a diagram showing a first modified example of the pin press-in portion, (c) is a diagram showing a second modified example of the pin press-in portion, (d) is a diagram showing a third modified example of the pin press-in portion, and (e) is a diagram showing the nut portion. FIG. 1 is a diagram showing a modified example of a handle lever attachment/detachment device according to an embodiment of the present invention, and also shows the state in which the modified handle lever attachment/detachment device is attached to a butterfly valve so that the handle lever attachment/detachment device can extract a through pin inserted into the butterfly valve.

Below, we will explain the structure of the butterfly valve based on the drawings, and then explain the handle lever attachment/detachment device according to an embodiment of the present invention.

(Butterfly valve)
As shown in FIG. 1, the butterfly valve 1 comprises a valve box 2 having a fluid flow path 1A therein, a valve element 3 provided inside the valve box 2 and having a disk portion 3A that is rotatable between an open position for opening the fluid flow path 1A and a closed position for closing the fluid flow path 1A around a first rotation axis AR1 extending in a direction perpendicular to a central axis 2F of the fluid flow path 1A, a ring-shaped seat ring 4 interposed between the circumferential surface of the disk portion 3A in a position for closing the fluid flow path 1A and the inner circumferential surface of the valve box 2, and a seat ring 4 connected to the valve element 3. the valve body connecting part 5 being rotatably attached to the valve box 2 in this state around a first rotation axis AR1, a handle lever 6 connected to the valve body connecting part 5 so as to rotate the valve body connecting part 5 around the first rotation axis AR1 when receiving an operating force around the first rotation axis AR1, a through pin 7 for attaching the handle lever 6 to the valve body connecting part 5, and a rotation restriction member 8 for restricting rotation of the handle lever 6 and the valve body connecting part 5 around the first rotation axis AR1.

The valve box 2 is made of a rigid body such as stainless steel and has a cylindrical main body 2A, two cylindrical valve stem receiving portions 2B, 2C that extend outward from the outer periphery of the main body 2A along the first rotation axis AR1, and a groove portion 2D provided on the inner periphery of the portion of the main body 2A where the valve stem receiving portions 2B, 2C are provided. The valve stem receiving portions 2B, 2C are each formed with a through hole 2E, one opening of which opens into the fluid flow path 1A and the other opening of which opens outward in a direction perpendicular to the central axis 2F of the fluid flow path 1A.

The valve body 3 is made of a rigid body such as stainless steel, and in addition to the disk portion 3A, has a first valve stem 3B extending outward from one end of the rotating shaft 3G in the disk portion 3A, and a second valve stem 3C extending outward from the other end of the rotating shaft 3G in the disk portion 3A. The first valve stem 3B is inserted into the through hole 2E of the valve stem receiving portion 2B, and the second valve stem 3C is inserted into the through hole 2E of the valve stem receiving portion 2C.

The seat ring 4 is made of a ring-shaped elastic body, and fits into the grooves 2D provided in the valve stem receiving portions 2B and 2C, respectively, to seal between the valve box 2 and the valve body 3. The seat ring 4 has valve stem insertion holes 4A into which the first valve stem 3B and second valve stem 3C of the valve body 3 are inserted, and holds the valve body 3 in a state in which the disk portion 3A can rotate.

The valve body 3 and the seat ring 4 can be attached to and detached from the valve box 2 with the first valve stem 3B and the second valve stem 3C of the valve body 3 inserted into the valve stem insertion hole 4A of the seat ring 4. When the valve body 3 and the seat ring 4 are attached to the valve box 2, the first valve stem 3B and the second valve stem 3C are inserted into the valve stem receiving portions 2B and 2C, respectively, and the seat ring 4 is placed in the groove portion 2D of the valve box 2. A valve body connecting portion 5 is connected to the first valve stem 3B so that a rotational force can be transmitted to the valve body 3. By rotating the valve body connecting portion 5 connected to the first valve stem 3B, the valve body 3 can be rotated between an open position and a closed position to open and close the fluid flow path 1A.

As described above, the valve body connecting part 5 is connected to the first valve rod 3B to rotate the valve body 3 around the first rotation axis AR1. As shown in Figs. 1 and 2, the valve body connecting part 5 has a pair of support pieces 5a that extend in the direction extending along the first rotation axis AR1 and face each other in a direction perpendicular to said direction, and a groove portion 5b formed between the pair of support pieces 5a. The pair of support pieces 5a support the handle lever 6 while sandwiching the handle lever 6 inserted into the groove portion 5b. As a result, the pair of support pieces 5a are located on both sides of the handle lever 6, so that the handle lever 6 and the valve body connecting part 5 can rotate together around the first rotation axis AR1.

The handle lever 6 has a portion sandwiched between a pair of support pieces 5a and an operated portion 6a extending in a direction perpendicular to the direction in which the first rotation axis AR1 extends. When an operating force about the first rotation axis AR1 is input to the operated portion 6a, the valve body 3 can be rotated about the first rotation axis AR1 via the valve body connecting portion 5. In addition, the handle lever 6 receives an operating force about the through pin 7 parallel to the second rotation axis AR2, and can rotate about the second rotation axis AR2 relative to the valve body connecting portion 5 between a restricted position and an allowable position, which will be described later.

A hole 5h is formed in a direction perpendicular to the first rotation axis AR1 and penetrates the pair of support pieces 5a of the valve body connection part 5 and the part of the handle lever 6 that is sandwiched between the pair of support pieces 5a.

The through pin 7 is inserted into a pair of support pieces 5a and a hole 5h of the handle lever 6 so as to penetrate the pair of support pieces 5a of the valve body connecting part 5 that sandwich the handle lever 6 and the handle lever 6 in order to attach the handle lever 6 to the valve body connecting part 5. The through pin 7 is, for example, a spring pin, and may be hollow and have a variable diameter, or may be solid and have a diameter that matches the diameter of the hole 5h. The through pin 7 supports the handle lever 6 to the valve body connecting part 5 so that the handle lever 6 can rotate relative to the valve body connecting part 5 around a second rotation axis AR2 that passes through the hole 5h and is perpendicular to the first rotation axis AR1. The through pin 7 has a length equal to the depth of the hole 5h. A hole 7h is formed on each of both end faces of the through pin 7. The hole 7h is a hole for positioning the pin press-in part 30 of the handle lever attachment/detachment device 10 described later.

The rotation restricting member 8 is disposed between the valve stem receiving portion 2B of the valve box 2 and the valve body connecting portion 5, and engages with the tip portion 6b of the handle lever 6 to restrict the rotation of the handle lever 6 and the valve body connecting portion 5 around the first rotation axis AR1. The handle lever 6 is located on the opposite side of the operated portion 6a with respect to the first rotation axis AR1, and has a tip portion 6b that protrudes inward from the first rotation axis AR1. As shown in FIG. 3, the rotation restricting member 8 has a plurality of grooves 8d around its periphery that can receive the tip portion 6b in the radial direction of the first rotation axis AR1. The tip portion 6b of the handle lever 6 engages with the grooves 8d to restrict the handle lever 6 from rotating around the first rotation axis AR1. This position where the rotation of the handle lever 6 is restricted by the rotation restricting member 8 is referred to as the restricting position.

On the other hand, as shown in FIG. 4, when the handle lever 6 rotates around the second rotation axis AR2 and the tip 6b of the handle lever 6 moves upward (the operated part 6a moves downward), the tip 6b is released from the state in which it is engaged with the groove 8d of the rotation restricting member 8, and the handle lever 6 can rotate around the first rotation axis AR1. This position that allows the handle lever 6 to rotate around the first rotation axis AR1 is called the allowed position.

(Handle lever attachment/detachment device)
Next, the handle lever attachment/detachment device 10 will be described with reference to Fig. 5. In the following, the description will be given using directions in a state in which the handle lever attachment/detachment device 10 is attached to the butterfly valve 1.

The handle lever attachment/detachment device 10 is for attaching the handle lever 6 to the valve body connection part 5 by inserting the through pin 7 into the hole 5h provided in the valve body connection part 5 and the handle lever 6, and for removing the handle lever 6 from the valve body connection part 5 by removing the through pin 7 from the hole 5h. The handle lever attachment/detachment device 10 includes a holding part 20 that holds one of the pair of support pieces 5a of the valve body connection part 5 from one side in the direction in which the second rotation axis AR2 extends, a pin press-in part 30 having a thickness that can be inserted into the hole 5h for fitting the through pin 7 provided in the valve body connection part 5 and the handle lever 6, and a connecting mechanism 40 that connects the pin press-in part 30 and the holding part 20 to each other so that the pin press-in part 30 can be moved toward or away from the holding part 20 in the direction in which the second rotation axis AR2 extends when one of the pair of support pieces 5a is held by a predetermined operation.

The holding portion 20 has a contact surface 21 capable of surface contact with one of the pair of support pieces 5a of the valve body connecting portion 5, a notch 22 cut from the contact surface 21 along the second rotation axis AR2 to allow the movement of the penetration pin 7 to the holding portion 20, and an inclined surface 23 extending from the contact surface 21 toward the notch 22 and inclined with respect to the second rotation axis AR2. The holding portion 20 holds the butterfly valve 1 in a state in which the pin press-in portion 30 is positioned so as to be able to approach and separate from the other support piece 5a by the contact surface 21 coming into surface contact with one of the pair of support pieces 5a from one side in the direction in which the second rotation axis AR2 extends. The notch 22 is formed in a position in the holding portion 20 opposite the pin press-in portion 30 in the direction in which the second rotation axis AR2 extends. The notch 22 allows the through pin 7 to be pressed by the pin press-fitting portion 30 and to move in the direction in which the second rotation axis AR2 extends and in the direction approaching the holding portion 20.

The pin press-in portion 30 is for inserting or removing the through pin 7 into or from the hole 5h provided in the valve body connection portion 5 and the handle lever 6 by pressing the through pin 7 in the direction in which the second rotation axis AR2 extends. The pin press-in portion 30 has a pressing portion 31 and a protruding portion 32 protruding from the tip of the pressing portion 31. The pressing portion 31 contacts the end face of the through pin 7 to press the through pin 7. The pressing portion 31 has a diameter equal to or smaller than the diameter of the hole 5h and a length equal to or greater than the depth of the hole 5h. The protruding portion 32 has a diameter smaller than that of the pressing portion 31 so that it can be inserted into the positioning hole 7h formed on the end face of the through pin 7. By fitting the protruding portion 32 into the hole 7h, the pin press-in portion 30 can press the through pin 7 without being displaced.

The connecting mechanism 40 has a screw hole portion 41 in which a screw hole 41h extending in the direction of the second rotation axis AR2 is formed, a main body portion 42 to which the holding portion 20 and the screw hole portion 41 are connected with a gap therebetween, a screw portion 43 to which the pin press-in portion 30 is connected, and a screw portion rotation handle 44 connected to the screw portion 43 and capable of rotating the screw portion 43 around the second rotation axis AR2. The connecting mechanism 40 connects the holding portion 20 and the pin press-in portion 30 to each other via the main body portion 42, the screw hole portion 41, and the screw portion 43. This allows the pin press-in portion 30 to be moved toward and away from the holding portion 20 in the direction of the second rotation axis AR2.

The screw portion 43 is screwed into the screw hole 41h of the screw hole portion 41. As a result, the rotational motion of the screw portion 43 rotated by the screw portion rotation handle 44 is converted by the screw hole portion 41 into linear motion in the direction in which the second rotation axis AR2 extends.

The main body 42 has a first main body component 421 extending parallel to the direction in which the second rotation axis AR2 extends, a second main body component 422 connected to the first main body component 421 so as to intersect at one end of the first main body component 421, and a third main body component 423 connected to the first main body component 421 so as to intersect at the other end of the first main body component 421. The holding portion 20 is connected to the tip of the second main body component 422. The screw hole portion 41 is connected to the tip of the third main body component 423. The main body 42 is composed of the first main body component 421, the second main body component 422, and the third main body component 423, so that a space necessary for the valve body connection portion 5 to be disposed between the holding portion 20 and the pin press-fit portion 30 is formed in the main body 42.

Next, the procedure for inserting or removing the through pin 7 into or from the hole 5h in the valve body connection part 5 and the handle lever 6 in the butterfly valve 1 using the handle lever attachment/detachment device 10 will be described with reference to Figures 6 to 8.

When the through pin 7 is removed from the hole 5h, as shown in FIG. 6, the butterfly valve 1 is disposed between the holding portion 20 and the pin press-in portion 30 of the handle lever attachment/detachment device 10. At this time, the contact surface 21 of the holding portion 20 is in surface contact with one of the pair of support pieces 5a of the valve body connection portion 5 to hold the valve body connection portion 5. In this state, the pin press-in portion 30 is positioned on the other side of the pair of support pieces 5a by adjusting its position in the direction in which the second rotation axis AR2 extends so as to be spaced appropriately from the holding portion 20. Specifically, the pin press-in portion 30 is disposed so that the distance between the contact surface 21 of the holding portion 20 is equal to or greater than the distance between the outer surfaces of the pair of support pieces 5a of the valve body connection portion 5. The pin press-in portion 30 is disposed so as to be aligned in series with the through pin 7 inserted in the hole 5h in the direction in which the second rotation axis AR2 extends. The protrusion 32 of the pin press-fitting portion 30 is pre-positioned to be inserted into the hole 7h of the through pin 7. The operator of the handle lever attachment/detachment device 10 maintains the positioned state of the handle lever attachment/detachment device 10 and the butterfly valve 1 until the protrusion 32 is inserted into the hole 7h.

6, the operator of the handle lever attachment/detachment device 10 applies an operating force to the screw part rotation handle 44 of the connection mechanism 40 to rotate the screw part 43 around the second rotation axis AR2. As a result, since the screw part 43 is screwed into the screw hole part 41, it moves in the direction in which the second rotation axis AR2 extends and in the direction approaching the holding part 20. In other words, the rotational force applied to the screw part rotation handle 44 is converted into a moving force in the direction in which the second rotation axis AR2 of the screw part 43 extends. When the screw part 43 moves, the protrusion 32 is inserted into the hole 7h. The pressing part 31 of the pin press-in part 30 contacts the end face of the through pin 7 and presses the through pin 7 toward the holding part 20 in the direction in which the second rotation axis AR2 extends. Then, the pin press-in part 30 enters the hole 5h provided in the valve body connection part 5 and the handle lever 6. The through pin 7 pressed against the pin press-fitting portion 30 moves from the hole 5h into the notch 22 of the holding portion 20. Then, as shown in FIG. 7, the through pin 7 pressed against the pin press-fitting portion 30 comes completely out of the hole 5h and moves into the notch 22 of the holding portion 20. This allows the handle lever 6 to be removed from the valve body connecting portion 5. In the process of removing the through pin 7, the protrusion 32 is inserted into the hole 7h, preventing the through pin 7 and the pin press-fitting portion 30 from shifting radially from each other about the second rotation axis AR2, and maintaining a state in which they are lined up in series in the direction in which the second rotation axis AR2 extends.

On the other hand, when the through pin 7 is inserted into the hole 5h, as shown in FIG. 8, the butterfly valve 1 is disposed between the holding portion 20 and the pin press-in portion 30 of the handle lever attachment/detachment device 10, as in the case of removal. At this time, in the butterfly valve 1, the handle lever 6 is not attached to the valve body connecting portion 5, but is inserted into the groove portion 5b between the pair of support pieces 5a and is sandwiched between the pair of support pieces 5a. The contact surface 21 of the holding portion 20 is in surface contact with one of the pair of support pieces 5a of the valve body connecting portion 5 to hold the valve body connecting portion 5. In this state, the pin press-in portion 30 is disposed so that the distance between the contact surface 21 is equal to or greater than the distance between the outer surfaces of the pair of support pieces 5a of the valve body connecting portion 5 plus the length of the through pin 7. Furthermore, the through pin 7 is disposed in series with the hole 5h provided in the valve body connecting portion 5 and the handle lever 6 in the direction in which the second rotation axis AR2 extends. Furthermore, in this state, the pin press-in portion 30 is arranged so as to be aligned in series with the through pin 7 in the direction in which the second rotation axis AR2 extends. At this time, too, the protrusion 32 of the pin press-in portion 30 is pre-positioned at a position where it will be inserted into the hole 7h of the through pin 7.

8, the operator of the handle lever attachment/detachment device 10 applies an operating force to the screw portion rotation handle 44 of the connection mechanism 40 to rotate the screw portion 43 around the second rotation axis AR2. As described above, the rotating screw portion 43 generates a pressing force in the pin press-in portion 30 in the direction of extension of the second rotation axis AR2 toward the holding portion 20. As a result, the penetrating pin 7 is pressed by the pin press-in portion 30 and moves to the hole 5h. Then, the penetrating pin 7 pressed by the pin press-in portion 30 is completely inserted into the hole 5h and is fitted into the hole 5h as shown in FIG. 6. As a result, the handle lever 6 is attached to the valve body connection portion 5. In the process of inserting the through pin 7, the through pin 7 may be attached to the pin press-fitting portion 30 in advance, and the pin press-fitting portion 30 may move with the through pin 7 relative to the valve body connecting portion 5, or the tip of the through pin 7 may be temporarily inserted into the hole 5h in advance, and the pin press-fitting portion 30 may move relative to the through pin 7. By inserting the protrusion 32 into the hole 7h, the through pin 7 and the pin press-fitting portion 30 are prevented from shifting radially from each other about the second rotation axis AR2, and are maintained in a state in which they are lined up in series in the direction in which the second rotation axis AR2 extends.

The effects of the handle lever attachment/detachment device 10 according to this embodiment are explained below.

The handle lever attachment/detachment device 10 allows the pin press-in portion 30 to be positioned opposite the end face of the through pin 7 in the direction of extension of the second rotation axis AR2, sandwiching the valve body connection portion 5 and the handle lever 6, while the holding portion 20 holds one of the pair of support pieces 5a of the valve body connection portion 5. In this state, by applying a predetermined operation to the connection mechanism 40, the pin press-in portion 30 moves toward and away from the holding portion 20 in the direction of extension of the second rotation axis AR2, thereby allowing the through pin 7 to be inserted and removed.

Here, if the through pin 7 has already been inserted into the hole 5h for the through pin 7 provided in the valve body connecting part 5 and the handle lever 6, as the pin press-in part 30 approaches the holding part 20, the pin press-in part 30 is inserted into the hole 5h, and the through pin 7 is pressed toward the holding part 20. In addition, a notch 22 that allows the through pin 7 to move in the direction of the second rotation axis AR2 is formed in the holding part 20 at a position opposite the pin press-in part 30 in the direction of the extension of the second rotation axis AR2, so that the through pin 7 pushed out of the hole 5h by the pin press-in part 30 can be guided into the notch 22. As a result, the through pin 7 can be pulled out of the hole 5h, i.e., the valve body connecting part 5 and the handle lever 6, and the handle lever 6 can be removed from the valve body connecting part 5. Therefore, according to the handle lever attachment/detachment device 10, the handle lever 6 in the butterfly valve 1 can be safely and easily removed by operating the connection mechanism 40.

On the other hand, when the through pin 7 is positioned in a hole 5h into which the through pin 7 is not inserted, the through pin 7 is pressed into the hole 5h as the pin press-in portion 30 approaches the holding portion 20. This causes the handle lever 6 to be attached to the valve body connecting portion 5. Therefore, according to the handle lever attachment/detachment device 10, the handle lever 6 in the butterfly valve 1 can be safely and easily attached by operating the connecting mechanism 40.

In addition, according to the handle lever attachment/detachment device 10, the pin press-in portion 30 has a length equal to or greater than the depth of the hole 5h, so that by pressing the through pin 7 until the pin press-in portion 30 is completely inserted into the hole 5h, the through pin 7 can be reliably removed from the hole 5h.

In addition, according to the handle lever attachment/detachment device 10, the connecting mechanism 40 can convert the rotational force applied to the threaded portion rotation handle 44 into a pressing force in the direction in which the second rotation axis AR2 extends. The pin press-in portion 30 connected to the threaded portion 43 of the connecting mechanism 40 is then subjected to a pressing force in the direction in which the second rotation axis AR2 extends.

In addition, with the handle lever attachment/detachment device 10, the pin press-in portion 30 is prevented from shifting from the end face of the through pin 7 by inserting the protrusion 32 into the positioning hole 7h on the end face of the through pin 7, and the pressing portion 31 can press the through pin 7.

The through pin 7 pushed out in the direction of the second rotation axis AR2 from the hole 5h provided in the valve body connection part 5 of the butterfly valve 1 and the handle lever 6 by the pin press-in part 30 of the handle lever attachment/detachment device 10 is allowed to move in the direction of the second rotation axis AR2 by the notch 22 of the holding part 20. At this time, even if the through pin 7 is pushed out from the position of the notch 22 toward the contact surface 21, the handle lever attachment/detachment device 10 guides the through pin 7 to the inclined surface 23 that extends from the contact surface 21 toward the notch 22 and is inclined with respect to the second rotation axis AR2, and moves into the notch 22 of the holding part 20, so that the worker can continue the work of removing the through pin 7. Therefore, the handle lever attachment/detachment device 10 can improve the workability of the work of removing the through pin 7.

In the above embodiment, an example was described in which the pin press-in portion 30 is fixed to the threaded portion 43 and cannot be detached, but it is preferable that the pin press-in portion 30 is detachably connected to the threaded portion 43. This is because the through pin 7 may have different thicknesses and lengths for each butterfly valve 1, and the pin press-in portion 30 should be replaced with one having a thickness and length that corresponds to the through pin 7 that is to be pressed, and used in the handle lever attachment/detachment device 10.

The removable connection form of the pin press-fitting portion 30 is described below.

The handle lever attachment/detachment device 10 includes a pin press-in member 35. As shown in the first modified example in FIG. 9(a) and (b), the pin press-in member 35 has a pin press-in portion 30 and a portion attached to the nut portion 45 described later. The pin press-in portion 30 is a portion located on the holding portion 20 side with respect to the end face of the nut portion 45 facing the holding portion 20. The portion attached to the nut portion 45 is a portion located on the connecting mechanism 40 side with respect to the end face of the nut portion 45 facing the holding portion 20. The portion attached to the nut portion 45 has a portion having the same diameter as the pin press-in portion 30, an expanded diameter portion 33 that is expanded in diameter more than this portion, and a base portion 34 that is connected to the expanded diameter portion 33 and inserted into a hole 43h formed at the tip of the screw portion 43. The base portion 34 has a diameter larger than the pin press-in portion 30 and smaller than the expanded diameter portion 33. The length and thickness of the pressing portion of the pin press-fit portion 30 shown in Figures 9(a) and (b) are equal to the length and thickness of the pin press-fit portion 30 shown in Figures 5 to 8.

The handle lever attachment/detachment device 10 further includes a second pin press-in member 35 having a second pin press-in portion 30 that is different from the pin press-in portion 30 of FIGS. 9(a) and (b) in at least one of the thickness and length, as shown in FIG. 9(c) or (d). FIG. 9(c) shows the pin press-in portion 30 of the second modified example in which the length of the pressing portion is longer than that of the pin press-in portion 30 of the first modified example in FIGS. 9(a) and (b). FIG. 9(d) shows the pin press-in portion 30 of the third modified example in which the length of the pressing portion is shorter than that of the pin press-in portion 30 of FIGS. 9(a) and (b). When inserting the through pin 7 using the handle lever attachment/detachment device 10, a pin press-in portion 30 with a short pressing portion as shown in FIG. 9(d) is preferable.

The connecting mechanism 40 of the handle lever attachment/detachment device 10 further includes a nut portion 45 that can be screwed onto the threaded portion 43 so that the pin press-in portion 30 can be selectively attached and detached. As shown in FIG. 9(e), the nut portion 45 is formed with a first hole 45h1 into which the tip of the portion of the pin press-in member 35 that is attached to the nut portion 45 is inserted, a second hole 45h2 into which the enlarged diameter portion 33 of the pin press-in portion 30 is inserted, and a third hole 45h3 that is screwed onto the threaded portion 43.

Then, as shown in FIG. 9(a), the pin press-in member 35 has a pin press-in portion 30 appropriately selected according to the through pin 7 to be pressed. With the tip of the portion attached to the nut portion 45 and the enlarged diameter portion 33 inserted into the nut portion 45, the nut portion 45 screws into the threaded portion 43, thereby sandwiching the enlarged diameter portion 33 between the nut portion 45 and the threaded portion 43. As a result, the pin press-in portion 30 is attached to the threaded portion 43.

According to the handle lever attachment/detachment device 10 relating to the above-mentioned connection form of the pin press-in portion 30 to the threaded portion 43, the pin press-in portion 30 can be attached and detached to the threaded portion 43 by the nut portion 45, so that the pin press-in portion 30 can be easily replaced with a second pin press-in portion 30 that is different in at least one of the length and thickness.

The handle lever attachment/detachment device 10 may have a positioning member of its own that is used to position it in an appropriate position when attached to the butterfly valve 1.

Specifically, as shown in FIG. 10, the handle lever attachment/detachment device 10 may further include a positioning member 50 having an insertion portion 51 that can be inserted into a positioning hole 7h formed in the end face of the through pin 7, and a movable connecting mechanism 60 that connects the positioning member 50 to the connecting mechanism 40 so that the positioning member 50 faces the pin press-in portion 30 in the direction in which the second rotation axis AR2 extends, and the positioning member 50 receives a pressing force from the pin press-in portion 30 via the through pin 7, thereby allowing the positioning member 50 to move in a direction away from the support piece 5a.

The positioning member 50 has a positioning member main body 52 and an insertion portion 51 provided at the tip of the positioning member main body 52. The positioning member main body 52 has a thickness that allows it to be inserted into the holes 5h provided in the valve body connecting portion 5 and the handle lever 6.

The movable connecting mechanism 60 has an arm portion 61 having a first arm portion extending from the connecting mechanism 40 in the direction in which the second rotation axis AR2 extends to the opposite side of the pin press-in portion 30, and a second arm portion extending from the tip of the first arm portion toward the holding portion 20 in a direction intersecting the direction in which the first arm extends, and an elastic portion 62 that extends from the arm portion 61 toward the pin press-in portion 30 in the direction in which the second rotation axis AR2 extends and has elasticity. The positioning member 50 is connected to the tip of the elastic portion 62 in a state in which they are lined up in series in the direction in which the second rotation axis AR2 extends. The positioning member 50 is arranged so as to pass through the notch 22 of the holding portion 20. The elastic portion 62 is also expandable in the direction in which the second rotation axis AR2 extends. The natural length of the elastic portion 62 is such that the inserted portion 51 provided at the tip of the positioning member main body 52 passes through the hole 5h and is positioned on the side of the screw portion 43. The elastic portion 62 has a spring constant that allows the inserted portion 51 to be positioned at a position that is a distance away from the contact surface 21 of the holding portion 20 toward the arm portion 61, the distance corresponding to the length of the through pin 7.

The handle lever attachment/detachment device 10 further includes a positioning member 50 and a movable connecting mechanism 60, and the handle lever attachment/detachment device 10 and the through pin 7 can be positioned relative to each other by inserting the inserted portion 51 of the positioning member 50 into the hole 7h of the through pin 7.

Furthermore, the movable connecting mechanism 60 allows the positioning member 50 to move in a direction away from the support piece 5a of the valve body connecting portion 5 against the elastic force of the elastic portion 62 as the positioning member 50 receives the pressing force from the pin press-in portion 30 via the through pin 7, thereby allowing the through pin 7 to move towards the holding portion 20. Therefore, the handle lever attachment/detachment device 10 allows the through pin 7 to move in the direction in which the second rotation axis AR2 extends while maintaining the relative positioning state between the through pin 7 and the valve body connecting portion 5, and between the handle lever 6 and the holding portion 20 of the handle lever attachment/detachment device 10.

Furthermore, according to the handle lever attachment/detachment device 10 further including the positioning member 50 and the movable connecting mechanism 60, when the through pin 7 is inserted into the hole 5h provided in the valve body connection part 5 and the handle lever 6, the positioning member 50 having a thickness that can be inserted into the hole 5h is inserted into the hole 5h in advance, so that the handle lever attachment/detachment device 10 is positioned relative to the valve body connection part 5 and the handle lever 6. In this state, the insertion part 51 of the positioning member 50 is inserted into the positioning hole 7h formed on the end face of the through pin 7, so that the through pin 7 is positioned relative to the handle lever attachment/detachment device 10. As a result, the through pin 7, the valve body connection part 5, the handle lever 6, and the handle lever attachment/detachment device 10 are positioned relative to each other, and in this state, the pin press-in part 30 is moved in the direction of extension of the second rotation axis AR2 relative to the holding part 20 of the handle lever attachment/detachment device 10 by the connecting mechanism 40, so that the through pin 7 can be inserted into the hole 5h provided in the valve body connection part 5 and the handle lever 6 without being misaligned. Furthermore, at this time, the movable connecting mechanism 60 allows the positioning member 50 to move in a direction away from the support piece 5a of the valve body connecting portion 5 by receiving the pressing force from the pin press-in portion 30 via the through pin 7, thereby allowing the through pin 7 to move closer to the holding portion 20. Therefore, with the handle lever attachment/detachment device 10 further including the positioning member 50 and the movable connecting mechanism 60, the through pin 7 can be inserted while maintaining the relative positioning state between the valve body connecting portion 5, the handle lever 6, and the holding portion 20 of the handle lever attachment/detachment device 10.

In the modified example of the handle lever attachment/detachment device, the positioning member 50 is connected to the connection mechanism 40 by the movable connection mechanism 60 so that the positioning member 50 retreats when it receives a force from the through pin 7, thereby achieving the relative positioning of the through pin 7 and the valve body connection part 5, the handle lever 6, and the handle lever attachment/detachment device 10. On the other hand, even in the embodiment of the handle lever attachment/detachment device, the operator can use the positioning member 50 to achieve the relative positioning of the through pin 7 and the valve body connection part 5, the handle lever 6, and the handle lever attachment/detachment device 10. Specifically, during the process of inserting and removing the through pin 7 by the handle lever attachment/detachment device 10, the operator holds the positioning member 50 in his/her hand and performs the relative positioning of the through pin 7 and the valve body connection part 5, the handle lever 6, and the handle lever attachment/detachment device 10. Next, the pin press-in part 30 performs an operation to press the through pin 7, and the operator may operate the handle lever attachment/detachment device 10 while retreating the positioning member 50 when it receives a force from the through pin 7.

REFERENCE SIGNS LIST 1 Butterfly valve 1A Fluid flow path 2 Valve body 3 Valve body 4 Seat ring 5 Valve body connecting portion 5a Pair of support pieces 5h Hole 6 Handle lever 7 Through pin 7h Hole 10 Handle lever attachment/detachment device 20 Holding portion 21 Contact surface 22 Notch 23 Inclined surface 30 Pin press-fit portion 31 Pressing portion 32 Protruding portion 40 Connection mechanism 41 Screw hole portion 41h Screw hole 42 Main body portion 43 Screw portion 44 Screw portion rotating handle 45 Nut portion 50 Positioning member 51 Inserted portion 60 Movable connection mechanism AR1 First rotating shaft AR2 Second rotating shaft

Claims (6)

a valve body having a fluid flow path therein;
a valve body provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve body between an opening position for opening the fluid flow path and a closing position for closing the fluid flow path;
a valve body connecting portion that is connected to the valve body and is attached to the valve body so as to be rotatable about the first rotation axis with respect to the valve body;
a handle lever connected to the valve body connecting portion so as to rotate the valve body connecting portion about the first rotation shaft by receiving an operating force about the first rotation shaft;
a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation;
A handle lever attachment/detachment device for attaching or detaching a handle lever by inserting and removing the through pin into and from the valve body connection portion and the handle lever in a butterfly valve having the above structure,
a holding portion that holds one of the pair of support pieces from one side in a direction in which the second rotation shaft extends;
a pin press-fitting portion having a thickness that allows the pin to be inserted into a hole for fitting the pin, the hole being provided in the valve body connecting portion and the handle lever;
a coupling mechanism that couples the pin press-in portion and the holding portion to each other such that the pin press-in portion can be moved toward and away from the holding portion in a direction along which the second rotation shaft extends while the pin press-in portion is holding one of the pair of support pieces by receiving a predetermined operation; and
Equipped with
a notch that allows movement of the through pin in the extension direction of the second rotation shaft is formed in the holding portion at a position opposite to the pin press-fitting portion in the extension direction of the second rotation shaft ,
The pin press-fitting portion has a length equal to or greater than the depth of the hole,
The connecting mechanism includes:
a screw hole portion in which a screw hole extending in a direction in which the second rotation shaft extends is formed;
a main body portion to which the holding portion and the screw hole portion are connected with a gap therebetween;
a threaded portion that is screwed into the threaded hole of the threaded hole portion and to which the pin press-fitting portion is connected;
a screw portion rotation handle connected to the screw portion and capable of rotating the screw portion around the second rotation axis,
The screw portion that screws into the screw hole of the screw hole portion rotates due to a rotational force applied to the screw portion rotation handle, and the rotation of the screw portion is converted by the screw hole portion into a movement of the pin press-fit portion in the extension direction of the second rotation shaft, thereby generating a pressing force in the extension direction of the second rotation shaft .
Handle lever attachment/detachment device. a valve body having a fluid flow path therein;
a valve body provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve body between an opening position for opening the fluid flow path and a closing position for closing the fluid flow path;
a valve body connecting portion that is connected to the valve body and is attached to the valve body so as to be rotatable about the first rotation axis with respect to the valve body;
a handle lever connected to the valve body connecting portion so as to rotate the valve body connecting portion about the first rotation shaft by receiving an operating force about the first rotation shaft;
a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation;
A handle lever attachment/detachment device for attaching or detaching a handle lever by inserting and removing the through pin into and from the valve body connection portion and the handle lever in a butterfly valve having the above structure,
a holding portion that holds one of the pair of support pieces from one side in a direction in which the second rotation shaft extends;
a pin press-fitting portion having a thickness that allows the pin to be inserted into a hole for fitting the pin, the hole being provided in the valve body connecting portion and the handle lever;
a coupling mechanism that couples the pin press-in portion and the holding portion to each other such that the pin press-in portion can be moved toward and away from the holding portion in a direction along which the second rotation shaft extends while the pin press-in portion is holding one of the pair of support pieces by receiving a predetermined operation; and
Equipped with
a notch that allows movement of the through pin in the extension direction of the second rotation shaft is formed in the holding portion at a position opposite to the pin press-fitting portion in the extension direction of the second rotation shaft,
The pin press-fitting portion has a length equal to or greater than the depth of the hole,
The pin press-fitting portion is
A pressing portion for pressing the through pin;
a protrusion having a diameter smaller than that of the pressing portion and protruding from a tip end of the pressing portion so as to be insertable into a positioning hole formed in an end surface of the through pin;
having
Handle lever attachment/detachment device. The handle lever attachment/detachment device further includes a second pin press-fitting portion having at least one of a thickness and a length different from that of the pin press-fitting portion,
The connecting mechanism further includes a nut portion that can be screwed onto the threaded portion so as to selectively attach and detach the pin press-fitting portion.
The handle lever attachment/detachment device according to claim 1 . a valve body having a fluid flow path therein;
a valve body provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve body between an opening position for opening the fluid flow path and a closing position for closing the fluid flow path;
a valve body connecting portion that is connected to the valve body and is attached to the valve body so as to be rotatable about the first rotation axis with respect to the valve body;
a handle lever connected to the valve body connecting portion so as to rotate the valve body connecting portion about the first rotation shaft by receiving an operating force about the first rotation shaft;
a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation;
A handle lever attachment/detachment device for attaching or detaching a handle lever by inserting and removing the through pin into and from the valve body connection portion and the handle lever in a butterfly valve having the above structure,
a holding portion that holds one of the pair of support pieces from one side in a direction in which the second rotation shaft extends;
a pin press-fitting portion having a thickness that allows the pin to be inserted into a hole for fitting the pin, the hole being provided in the valve body connecting portion and the handle lever;
a coupling mechanism that couples the pin press-in portion and the holding portion to each other such that the pin press-in portion can be moved toward and away from the holding portion in a direction along which the second rotation shaft extends while the pin press-in portion is holding one of the pair of support pieces by receiving a predetermined operation; and
Equipped with
a notch that allows movement of the through pin in the extension direction of the second rotation shaft is formed in the holding portion at a position opposite to the pin press-fitting portion in the extension direction of the second rotation shaft,
The holding portion has a contact surface capable of surface-contacting one of the pair of support pieces, and an inclined surface extending from the contact surface toward the notch and inclined with respect to the second rotation axis .
Handle lever attachment/detachment device. a valve body having a fluid flow path therein;
a valve body provided in the valve box so as to be rotatable about a first rotation axis extending in a direction intersecting the fluid flow path of the valve body between an opening position for opening the fluid flow path and a closing position for closing the fluid flow path;
a valve body connecting portion that is connected to the valve body and is attached to the valve body so as to be rotatable about the first rotation axis with respect to the valve body;
a handle lever connected to the valve body connecting portion so as to rotate the valve body connecting portion about the first rotation shaft by receiving an operating force about the first rotation shaft;
a pair of support pieces of the valve body connecting part sandwiching the handle lever, and a through pin fitted into the pair of support pieces and the handle lever so as to penetrate the handle lever, in order to attach the handle lever to the valve body connecting part so that the handle lever can rotate relative to the valve body connecting part around a second rotation axis perpendicular to the first rotation axis between a restricting position that restricts rotation of the handle lever around the first rotation axis and an allowing position that allows the rotation;
A handle lever attachment/detachment device for attaching or detaching a handle lever by inserting and removing the through pin into and from the valve body connection portion and the handle lever in a butterfly valve having the above structure,
a holding portion that holds one of the pair of support pieces from one side in a direction in which the second rotation shaft extends;
a pin press-fitting portion having a thickness that allows the pin to be inserted into a hole for fitting the pin, the hole being provided in the valve body connecting portion and the handle lever;
a coupling mechanism that couples the pin press-in portion and the holding portion to each other such that the pin press-in portion can be moved toward and away from the holding portion in a direction along which the second rotation shaft extends while the pin press-in portion is holding one of the pair of support pieces by receiving a predetermined operation; and
Equipped with
a notch that allows movement of the through pin in the extension direction of the second rotation shaft is formed in the holding portion at a position opposite to the pin press-fitting portion in the extension direction of the second rotation shaft,
a positioning member having an insertion portion that can be inserted into a positioning hole formed on an end surface of the through pin;
the positioning member faces the pin press-fitting portion in a direction in which the second rotation shaft extends, and
a movable connecting mechanism that connects the positioning member to the connecting mechanism such that the positioning member is movable in a direction away from the support piece by receiving a pressing force from the pin press-fitting portion via the through pin;
Further comprising :
Handle lever attachment/detachment device. The positioning member has a thickness that allows it to be inserted into holes for fitting the through pin, the holes being provided in the valve body connecting portion and the handle lever.
6. A handle lever attachment/detachment device according to claim 5 .