JPH1030624A - Fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform operation to mount and dismount a fixing pin, provided at its tip with a stopper for pin slip-off prevention, on the base part side of the fixing pin. SOLUTION: A fixing device is formed such that a protector is removably fixed by inserting a fixing pin 2 in a protector for a crank base and a valve protection. A stopper plate 7 for pin slip-off protection is attached rotatably about a horizontal axis to the tip part of the fixed pin 2. The center of gravity G of the stopper plate 7 is set to a position deviated from a rotation center, and by rotating the fixing pin 2 around the axis thereof, the stopper plate 7 is rotatably displaced to an insertion permissive position for a pin in a horizontal attitude and a slip-off preventive position for a pin in a standing-upright attitude. Further, the fixing pin 2 is provided with a stopper pin 9 to hold the stopper plate 7 in a pin insertion permission position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple detachable pin-type fixing device used for detachably fixing a member to be fixed to a fixing member.

[0002]

2. Description of the Related Art FIG. 14 shows a conventional fixing device using a simple detachable pin. This fixing device is used, for example, when fixing a detachable or openable cover 39 to the case 38. The fixing device includes a fixing pin 31 as a main constituent member, and a U formed at a tip of the fixing pin 31.
A stopper plate 33 is rotatably attached to the groove 32 via a spring pin 34, and a photograph 35, a ring plate 36, and a compression coil spring 37 are provided on the base side of the fixed pin 31.

[0005] As shown in FIG. 15A, the fixing pin 31 having the above structure is used to hold the photographer 35 with one finger and to bring the stopper plate 33 into a posture parallel to the axis of the fixing pin 31 with the other finger. 39 and the hole of the case 38. After the fixing pin 31 is inserted, if the stopper plate 33 is rotationally displaced to a position orthogonal to the axis of the fixing pin 31 and then the insertion force of the fixing pin 31 is released,
As shown in (b), the stopper plate 33 is pressed against the case 38 by the spring force of the compression coil spring 37,
The fixing pin 31 is prevented from coming off. Thus, the cover 39
Is detachably fixed to the case 38.

[0004]

However, in the above-described conventional pin-type fixing device, when the fixing pin 31 is attached or detached, that is, when the fixing pin 31 is inserted or removed, both sides of the fixing pin 31 on the base side and the distal end side are required. There is such an annoyance. In addition, as shown in FIG. 15, in a case where the obstacle X exists on the distal end side of the fixing pin 31, it is difficult to manually operate the stopper 33 due to space, and it is difficult to attach and detach the fixing pin 31. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to perform an attaching / detaching operation of a fixing pin having a pin stopper at its tip on the base side of the fixing pin. It is an object of the present invention to provide a fixing device capable of performing the above.

[0006]

Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, the invention according to claim 1 is a fixing device for removably fixing a fixing member and a member to be fixed to each other by inserting the fixing pin into the fixing member, and a pin for preventing a pin from being removed at a tip end of the fixing pin. The stopper is displaceably provided at a pin insertion / removal allowable position for allowing the fixing pin to be inserted / removed and a pin removal preventing position for preventing the fixing pin from coming off, and the stopper can be operated on the base side of the fixing pin. Features.

According to the first aspect of the present invention, the stopper can be operated at the pin insertion / removal allowable position and the pin retaining position at the base side of the fixing pin. It can be done on its base side.

According to a second aspect of the present invention, there is provided a fixing device for removably fixing a fixing member and a member to be fixed to each other by inserting the fixing pin into the fixing member and the member to be fixed. The stopper is rotatably mounted, and the center of gravity of the stopper is set at a position deviated from the center of rotation of the stopper to allow the removal and insertion of the fixing pin. The fixing pin is provided with a rotation restricting portion that holds the stopper at a pin removal / insertion allowable position.

Therefore, according to the second aspect of the present invention, if the fixing pin is horizontally rotated about its axis, the stopper is rotated because the center of gravity is located at a position deviated from the center of rotation. Move. That is, according to the second aspect of the present invention, by rotating the fixing pin about the axis, the stopper can be rotationally displaced between the pin retaining position and the pin removal / insertion allowable position, and the pin removal / insertion allowable position. The stopper is rotated by the rotation restricting portion, and its rotation is restricted and is held at the pin removal / insertion allowable position.

According to a third aspect of the present invention, in the fixing device according to the second aspect, the fixing pin is provided with a rotation restricting portion for holding the stopper at a pin retaining position, and the stopper is located at a pin removal / insertion allowable position. And the center of gravity of the stopper is set to be displaced to the pin retaining position.

Therefore, according to the third aspect of the invention, it is possible to reliably displace and hold the stopper between the pin retaining position and the pin removal / insertion allowable position when the fixing pin is rotated.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. The fixing device 1 according to the present embodiment is used for fixing a detachable protector 21 for protecting a valve to a clamp base 22 in a rotary roll clamp device of a forklift as shown in FIGS. 4 and 5, for example. That is, the clamp cylinder 22 is mounted on the clamp base 22 that supports the clamp arm 23.
A rotary valve 25 is provided as a hydraulic piping for the motor, and a protector 21 is attached to a front surface of the clamp base 22 by a plurality of fixing devices 1 around the front surface of the clamp base 22 in order to protect the rotary valve 25.

As shown in FIG. 4, the protector 21 is usually used to receive the back surface of the roll paper W. However, when handling a large-diameter roll paper W as shown in FIG. Must be removed from 22 and
The rotary valve 25 may be removed for maintenance or repair. Therefore, as shown in FIGS. 7 and 8, the fixing device 1 according to the present embodiment has a configuration in which a fixed member such as the protector 21 is detachably fixed to a fixing member such as the clamp base 22. Applied.

A first embodiment will be described with reference to FIGS. As shown in FIG. 1, a fixing device 1 according to this embodiment is a simple detachable pin type, and mainly includes a fixing pin 2 having a circular cross section. The fixed pin 2 is a stepped parallel pin having a small diameter at the base end side to which the photograph 3 is fixed. A compression coil spring 5 is provided between the ring plate 4 fitted to the small diameter portion and the photograph 3. Is provided.

A U-shaped groove 6 having a required length is formed at the tip of the fixed pin 2 along the center of the axis, and a stopper plate 7 as a pin retaining stopper is formed in the U-shaped groove 6 so as to extend in the surface direction. The fixing pin 2 is arranged in the axial direction. The stopper plate 7 is formed in a rectangular shape having a width smaller than the diameter of the fixing pin 2 and a longer length, and a substantially central portion thereof is rotatably supported by a spring pin 8 extending in the radial direction of the fixing pin 2.

The center of gravity G (represented by a mark x) of the stopper plate 7 is set at a position deviated from the center of rotation.
In this embodiment, a hole 7 is formed at a corner of the stopper plate 7.
a, the center of gravity G is set on the upper side of the diagonal line. When the fixing pin 2 is turned horizontally around its axis, the stopper plate 7 rotates around the spring pin 8. And is rotated and displaced between a horizontal posture in which the major axis direction is parallel to the axial direction of the fixing pin 2 and an upright posture in which the orthogonal direction is perpendicular. In the horizontal position, the fixing pin 2 is within the diameter of the fixing pin 2 to allow the fixing pin 2 to be inserted and removed. In the upright position, both ends protrude outward beyond the diameter of the fixing pin 2 to prevent the fixing pin 2 from coming off. Hereinafter, the horizontal posture position is referred to as a pin insertion / removal allowable position, and the upright posture position is referred to as a pin retaining position.

The position of the center of gravity G is determined by the above-mentioned hole 7a.
In addition to the above, it is also possible to set by cutting off one corner, changing the wall thickness, or attaching a weight. A stopper pin 9 is provided at the tip of the fixed pin 2 so as to cross the bottom of the U groove 6.
The stopper pin 9 abuts on one end of the stopper plate 7 to regulate its rotation, thereby constituting a rotation restricting portion for holding the stopper plate 7 at a pin insertion / removal allowable position.

This embodiment is constructed as described above. Hereinafter, the operation of attaching and detaching the fixing pin 2 will be described with reference to FIGS. At the time of wearing,
First, as shown in FIG. 2A, the fixing pin 2 is rotated so that the stopper pin 9 faces upward, and the end of the stopper plate 7 opposite to the center of gravity G side (the left side in the drawing) is brought into contact with the stopper pin 9. Contact As a result, the stopper plate 7 is held at the pin insertion / removal allowable position.
Into the holes of the protector 21 and the clamp base 22.

Then, as shown in FIG. 2B, the fixing pin 2 is inserted deeply to a position where the stopper plate 7 is completely removed from the clamp base 22 while compressing the compression coil spring 5 and then turned 180 degrees around its axis. When the stopper plate 7 moves, the stopper plate 7 rotates counterclockwise in the drawing so that its center of gravity G is directly below the center of rotation, and becomes substantially vertical (in the case of the present embodiment, slightly inclined due to the position of the center of gravity G). Become. That is, since the stopper plate 7 is rotated to the pin retaining position, if the insertion force of the fixing pin 2 is released in this state, the fixing pin 2 is released by the compression coil spring 5 as shown in FIG. And the stopper plate 7 is brought into contact with the clamp base 22 to prevent the fixing pin 2 from coming off. Thus, the protector 21 is fixed to the clamp base 22.

Next, a case where the fixing pin 2 is removed will be described. This case is basically achieved by performing the reverse operation at the time of mounting. That is, as shown in FIG. 3 (a), the fixing pin 2 is turned in 180 degrees by pushing the fixing pin 2 in place or slightly, thereby displacing the stopper pin 9 upward. By this rotation, the center of gravity G of the stopper plate 7 is located above the center of rotation and slightly to the left of a vertical line passing through the center of rotation. Accordingly, if the fixing plate 2 is inserted deeply in this state to make the stopper plate 7 free, the stopper plate 7 rotates counterclockwise in the drawing and abuts against the stopper pin 9 in a horizontal state, and FIG. , That is, at the pin removal / insertion allowable position.

If the fixing plate 2 is first inserted deeply to make the stopper plate 7 free, and then rotated 180 degrees, the center of gravity G of the stopper plate 7 is directly above the center of rotation, and the stopper plate 7 is shown in the figure. It may be rotated to the right and the end on the side of the center of gravity G may contact the stopper pin 9 from above. However, in this case, if the fixing pin 2 is once returned to the original position and the stopper plate 7 is set in the vertical state, the center of gravity G is on the left side of the vertical line passing through the center of rotation, so that the fixing pin 2 is When the stopper plate 7 is pushed deep again, the stopper plate 7 is rotated counterclockwise in the figure, and is displaced to the pin removal / insertion allowable position.

As described above, according to the present embodiment, by rotating the fixing pin 2, the stopper plate 7 for pin removal can be rotated to the pin removal / insertion allowable position and the pin removal prevention position. Therefore, the attachment / detachment operation of the fixing pin 2 can be performed on the base side. Therefore, the fixing pin 2 can be easily attached and detached even when there is an obstacle on the tip end side or when it is impossible to insert a finger.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the fixing pin 2
A first stopper pin 9a as a rotation restricting portion for holding the stopper plate 7 at the pin removal / insertion allowable position, and a second stopper pin 9b as a rotation restricting portion for holding the stopper plate 7 at the pin retaining position. Is set, and the stopper plate 7 is configured to be rotated and displaced in the same direction within a range of about 90 degrees.

Also in this case, the center of gravity G of the stopper plate 7 is located at the position where the pin can be pulled out and inserted as shown in FIG. 9A, on the side opposite to the first stopper pin 9a and passing through the center of rotation. It is set at a position lower than that. The center of gravity G is set by providing a hole 7a in the stopper plate 7.

According to the above configuration, in FIG. 9, the fixed pin 2 is connected to the protector 21 as shown in FIG. 9B while the stopper plate 7 is held at the pin insertion / removal allowable position by the first stopper pin 9a as shown in FIG. Clamp base 2
If the stopper plate 7 is rotated 180 degrees around its axis after being inserted into the second hole, the stopper plate 7 is rotated counterclockwise in the drawing to be displaced to the pin retaining position and abuts on the second stopper pin 9b. At this time, the center of gravity G is on the left side of a vertical line passing through the center of rotation. If the insertion force of the fixing pin 2 is released in this state, the fixing pin 2 is returned in the pulling-out direction by the compression coil spring 5 and the stopper plate 7 is brought into contact with the clamp base 22 to prevent the fixing pin 2 from coming off.

On the other hand, when removing the fixing pin 2,
If the fixing pin 2 is inserted deeply and then turned 180 degrees as shown in FIG. 7C, the stopper plate 7 whose center of gravity G is on the left side turns counterclockwise in the figure, and is initially regulated by the first stopper pins 9a. Is returned to the pin removal / insertion allowable position. That is, according to the second embodiment, since the rotation direction of the stopper plate 7 is always specified as a fixed direction, the rotation displacement to the pin insertion / removal allowable position and the pin retaining position is ensured.

Next, a third embodiment will be described with reference to FIG. In this embodiment, the stopper plate 7
Can be held by a single stopper pin 9 at a pin removal / insertion allowable position and a pin removal prevention position. That is, the two stopper pins 9a, 9 described in the second embodiment.
b is common, and the position setting of the center of gravity G is the same as in the second embodiment.

Accordingly, in FIG. 10, when the stopper pin 9 is located above the axis of the fixed pin 2 as shown in FIG. 10A, the stopper plate 7 is held at the pin removal / insertion allowable position, as shown in FIG. When it is located on the lower side, the stopper plate 7 is held at the pin retaining position. That is, according to the third embodiment, as in the second embodiment,
The rotation displacement of the stopper plate 7 to the pin removal / insertion allowable position and the pin retaining position can be reliably performed.

Next, a fourth embodiment will be described with reference to FIG. In this embodiment, a vertically long stopper plate 7 is arranged on the end face of the fixing pin 2 on the front end side, with its surface direction being parallel to the end face direction of the fixing pin 2,
The fixed pin 2 is suspended and supported by a support pin 10 at a position off the axis of the fixed pin 2 so as to be rotatable around an axis parallel to the axis.

Accordingly, when the fixing pin 2 is rotated so that the support pin 10 is located above the center of the axis of the fixing pin 2, the stopper plate 7 is accommodated within the diameter of the fixing pin 2 and the pin is allowed to be withdrawn. When the fixing pin 2 is rotated so that the support pin 10 is below the center of the axis of the fixing pin 2, the stopper plate 7 protrudes from the outer periphery of the fixing pin 2 as shown by an imaginary line, and is in a pin retaining position. in this way,
Also according to the fourth embodiment, by rotating the fixing pin 2, the stopper plate 7 for pin removal is displaced to the pin removal / insertion allowable position and the pin removal prevention position,
The attachment / detachment operation of the fixing pin 2 can be performed on the base side.

Next, a fifth embodiment will be described with reference to FIG. In this embodiment, a fixing pin 2 is formed by a pipe, and a stopper plate 7 is formed by a spring pin 8 in a U groove 6 formed at the tip of the fixing pin 2 as in the first embodiment. It is attached so as to be rotatable around the horizontal axis. The stopper plate 7 is constantly urged by a torsion spring 11 to a pin retaining position where both ends protrude to the outer periphery of the fixed pin 2, and is held at the pin retaining position by the stopper pin 12. I have.

On the other hand, on the base side of the fixing pin 2, as in the first embodiment, a photograph 3, a ring plate 4 and a compression spring 5 are provided, and the photograph 3 is It is slidably mounted in the direction. That is, the photograph 3 can be slid within the range of the long hole 3a along the guide pin 13 protruding from the outer periphery of the fixed pin 2, and the photograph 3 and the stopper plate 7 are connected to the string member 14 (or the link). ).

Therefore, according to such a configuration, at the base side of the fixing pin 2, the stopper plate 7 is pulled through the string member 14 against the torsion spring 11 by pulling the photograph 3 to allow the pin to be inserted and withdrawn. The stopper plate 7 can be rotated to the pin retaining position by returning the photographing 3 to the original position. Therefore, according to the fifth embodiment, the fixing pin 2 can be used not only in the horizontal direction but also in the vertical direction.

FIG. 13 shows a sixth embodiment. In this embodiment, a hole 2a having one end closed at the tip of the fixing pin 2 is provided in the radial direction.
A pin member 15 serving as a pin stopper is inserted into and removed from the hole 2a, and the ring member 16 prevents the pin member 15 from falling out of the hole 2a. Therefore, by rotating the fixing pin 2 around its axis, the pin member 15 is moved in and out of the hole 2a by utilizing its weight as shown in FIGS. It can be displaced to the stop position.

The application range of the fixing device according to the present invention is not limited to the fixing of the protector 21.
The application is possible as long as it is a use mode in which a plurality of members are detachably fixed. Further, the present invention is not limited to the case where the protector 21 is completely removed, and may be used as a stopper for an open / close end such as an openable / closable cover whose one end is supported by a hinge. Furthermore, the cross-sectional shape of the fixing pin 2 is not limited to a circle, but may be a square. In the mode in which the fixing pin 2 is rotated around the axis, the position of the stopper plate 7 may not be visually recognized,
It is desirable to attach a mark for indicating the plate position on the base side of the fixing pin 2.

[0036]

As described in detail above, according to the present invention,
The attachment / detachment operation of the fixing pin provided with the stopper for stopping the pin at the tip can be performed on the base side of the fixing pin. Therefore, it can be used even in a place where it is difficult or impossible to insert a finger into the tip of the pin.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fixing device according to a first embodiment.

FIG. 2 is an explanatory view showing a mounting mode of a fixing pin;
(A) is the insertion preparation state, (b) is the insertion 180
(C) shows a state in which it has been rotated by degrees.

FIG. 3 is an explanatory diagram showing a mode of pulling out a fixing pin;
(A) is a state rotated by 180 degrees for extraction,
(B) shows a state immediately before extraction.

FIG. 4 is a side view of a roll clamp device for a forklift with a detachable protector to which a fixing pin is applied;

FIG. 5 is a front view of the same.

FIG. 6 is a side view of the roll clamp device when the detachable protector is removed.

FIG. 7 is a view taken in the direction of arrow A in FIG. 4;

FIG. 8 is a detailed view of a portion B in FIG. 7;

FIGS. 9A and 9B are explanatory views showing a state of attaching and detaching a fixing pin according to the second embodiment, wherein FIG.
Shows a state rotated by 180 degrees after insertion, and (c) shows a state rotated by 180 degrees for removal.

FIGS. 10A and 10B are explanatory diagrams showing a state of attachment and detachment of a fixing pin according to the third embodiment, wherein FIG. 10A shows a state of insertion and removal, and FIG.

FIG. 11 is an explanatory diagram showing a fourth embodiment.

FIG. 12 is a partially cut-away side view of a fixing device according to a fifth embodiment.

FIG. 13 is an explanatory diagram showing a sixth embodiment,
(A) shows a state of insertion and removal, and (b) shows a state of retaining.

FIG. 14 is a perspective view showing a conventional simple detachable pin-type fixing device.

15 (a) and 15 (b) are explanatory views showing a mounting and dismounting state of a fixing pin of the conventional device, wherein FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed pin 5 ... U groove 6 ... Stopper plate 7 ... Spring pin 8 ... Stopper pin

Claims (3)

[Claims] 1. A fixing device for removably fixing a fixing member and a member to be fixed to each other by inserting a fixing pin into the fixing member, wherein a stopper for stopping the pin is fixed to a tip portion of the fixing pin. A fixing device which is displaceably provided at a pin insertion / removal allowable position for allowing a pin to be inserted / removed and a pin retaining position for preventing a fixed pin from being disengaged, the stopper being operable on the base side of the fixing pin. 2. A fixing device for inserting a fixing pin into a fixing member and a member to be fixed so as to removably fix the members to each other, wherein a stopper for stopping the pin is rotated at a tip end of the fixing pin. Attachment is possible, and the center of gravity of the stopper is set at a position deviated from the center of rotation of the stopper. A fixing device provided with a rotation restricting portion that holds the stopper at a pin removal / insertion allowable position on the fixing pin. 3. The fixing device according to claim 2, wherein the fixing pin is provided with a rotation restricting portion for holding the stopper at a pin retaining position, and the stopper is provided with a pin removal / insertion allowable position and a pin retaining position. A fixing device that sets the position of the center of gravity of the stopper so that it is displaced.