JP2018136007A - Cylindrical universal joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical universal joint suppressed in increase of manufacturing costs by not requiring a large-scaled metal mold and large-scaled manufacturing equipment, and suppressing depreciation costs relating to metal mold costs and manufacturing equipment costs.SOLUTION: A tubular member is mainly composed of a polygonal columnar cylinder extended in a direction of a central axis and having the elliptic shape on a cross section orthogonal to the central axis, and has a first connection port at one end side of the tubular member and a second connection port at the other end side of the tubular member. The first connection port is inclined to the face orthogonal to the central axis at a prescribed first angle, and the second connection port is inclined to the face orthogonal to the central axis at a prescribed second angle of a direction opposite to the prescribed first angle while having the same absolute value as the prescribed first angle. The tubular member has a substantially V-shape in a side view, and has butting connection portions at the first connection port and the second connection port. Faces connecting corresponding sides of a regular polygonal shape at a first connection port side and a regular polygonal shape at a second connection port side configure a polygonal columnar cylinder, and lines connecting corresponding apexes of the regular polygonal shape at the first connection port side and the regular polygonal shape at the second connection port side configure ridge lines of the polygonal columnar cylinder.SELECTED DRAWING: Figure 2B

Description

  The present invention relates to a cylindrical universal joint used for connection between an exhaust connection port of a ventilator such as a range hood and an external exhaust connection port attached to a wall of a building.

As a ventilation device for ventilating a room, an installation method installed on the ceiling or the inside of a wall has become mainstream. In such an installation type ventilator, connection to an external exhaust connection port attached to a wall portion of a building is performed using an integral elbow pipe or bellows pipe.
In the case of such an installation method, depending on the opening direction of the exhaust connection port on the ventilator side, due to the relationship with the mounting position of the external exhaust connection port on the wall, the connection direction between the exhaust connection port and the external exhaust connection port A misalignment may occur and the connection direction may not match. In such a case, it is necessary to connect either the elbow pipe or the bellows pipe or a combination of the elbow pipe and the bellows pipe to connect the exhaust connection port and the external exhaust connection port.

By the way, since the elbow pipe is a pipe joint having a fixed bending angle of 90 ° or the like, it is very difficult to connect depending on the misalignment angle in the connection direction, and the elbow pipe cannot cope with the elbow pipe alone. There is a case. In that case, it is performed using a combination of a bellows tube and an elbow tube having flexibility that allows the deflection of the direction, or using only a bellows tube.
Thus, the bellows pipe is adjustable with respect to the misalignment in the connection direction between the exhaust connection port and the external exhaust connection port, and thus is an effective pipe joint when the misalignment in the connection direction occurs. . However, since the bellows pipe has a large number of irregularities on the inner surface of the pipe, the ventilation resistance is increased, which is disadvantageous for smooth circulation of room air.
In particular, when bellows pipes are used as piping to the outside of a range hood that exhausts cooking exhaust generated during cooking indoors, the oil and fat contained in the cooking exhaust collides with unevenness. By being repeated, the oil and fat easily accumulate in the bellows tube, and dust adheres to the accumulated oil and fat and the ventilation resistance is further increased, which is not preferable.

  Therefore, in order to solve such a problem, the tubular universal joint A is formed by connecting a plurality of tubular members having connecting ports to be butt-connected in a cylindrical shape, and both the connecting ports are connected to each other. Abutting contact portion having an inner shield surface portion on one side of the connection port, which is formed in a substantially V shape in a side view in a cylindrical direction and is cut into a ring shape at an oblique angle. And a butt fitting portion that has an outer shield surface portion that butt-connects the butt contact portion with high sealing performance at the other connection port that is also formed in a perfect circle, and that butt-connects so that it cannot be pulled out. There has been proposed a cylindrical universal joint that can be adjusted in the direction and length with respect to misalignment by connecting the plurality of tubular members in the cylindrical direction and rotating in the circumferential direction. (For example, patent document 1).

JP 2010-181019 A

  However, the tubular member in Patent Document 1 is formed in a cylindrical shape using stainless steel or a steel plate, and is formed into a curved tubular shape in which a tube wall is curved at a desired arc angle. Since it is formed in a perfect circle perpendicular to the axis, in order to bend the tube wall at a desired arc angle in order to form a tubular member, it is generally a large mold or large scale. Manufacturing facilities are necessary.

  For this reason, an increase in depreciation costs related to mold costs, manufacturing equipment costs, etc. causes an increase in manufacturing costs, and there is room for improvement.

  The present invention has been made to solve the above-mentioned problems, and its purpose is not to require large-scale molds or large-scale manufacturing facilities, and to suppress depreciation costs related to mold costs or manufacturing equipment costs. In addition, the present invention is to provide a cylindrical universal joint in which an increase in manufacturing cost is suppressed.

  In order to solve the above-described problems, a cylindrical universal joint according to the present invention is a cylindrical universal joint formed by connecting a plurality of tubular members having connection ports at both ends so as to be slidably contacted and pivoted in a cylindrical shape. The tubular member is mainly a polygonal cylinder having a polygonal cross section extending in the direction of the central axis and perpendicular to the central axis, and as the connection port, the first connection port on one end side of the tubular member, A second connection port is provided on the other end side of the tubular member, and the first connection port is inclined at a predetermined first angle (θ / 2) with respect to a surface perpendicular to the central axis, and the second connection port Is inclined with respect to a plane perpendicular to the central axis at a predetermined second angle (−θ / 2) having the same absolute value as that of the predetermined first angle and opposite to the predetermined first angle. A member is formed in a substantially V shape in a side view, and a butt connection portion is provided at the first connection port and the second connection port. The first connection port and the second connection port are formed in the same regular polygon, and the regular polygon on the first connection port side and the regular polygon on the second connection port side. The surfaces connecting the corresponding sides in the above form the polygonal cylinder, and the corresponding vertices in the regular polygon on the first connecting port side and the regular polygon on the second connecting port side The connecting line constitutes a ridge line of the polygonal cylinder.

  Since the cylindrical universal joint according to the present invention is configured as described above, it does not require a large mold or a large-scale manufacturing facility like a conventional cylindrical universal joint, and does not require a mold cost or a manufacturing equipment cost. Therefore, the cylindrical universal joint in which the depreciation cost is suppressed and the increase in manufacturing cost is suppressed can be obtained.

  Also, a flange extending to the connection port in a direction away from the central axis, and a ring-shaped member disposed around the connection port on the side where the tubular member is present of the flange It is preferable to constitute the butt connection part.

  As described above, the flange extending to the connection port in a direction away from the central axis, and the ring-shaped member disposed around the connection port on the side of the tubular member on the flange By configuring the butt coupling portion, it is possible to configure the coupling portion relatively easily.

  Further, in a state where the connection port having the butt connection portion and the connection port having the butt connection portion are butt-connected, the ring-shaped members provided in both the butt connection portions act in a direction in which the ring-shaped members approach each other. And it is preferable to provide the fastening band which press-contacts the said butt | matching connection parts with which both the said connection ports are equipped.

  Thus, in the state where the connection port having the butt connection portion and the connection port having the butt connection portion are butt-connected, the ring-shaped members included in both the butt connection portions approach each other. It is possible to accurately bring the connecting portions into pressure contact with each other by providing the tightening band that presses the butt connecting portions provided in both the connection ports.

  Further, the fastening band is formed in a form having a U-shaped housing section that expands toward the open end inside the diameter thereof, and the connection port having the butt connection section and the butt contact When the fastening band is tightened in a state in which the ring-shaped members provided in both the butt coupling portions are housed in the housing portion in a state where the joint port having the coupling portion is butt-coupled, the housing is accommodated. It is preferable that it is comprised so that force may act in the direction in which the distance between the ring-shaped members with which both the said butt | matching connection parts are provided in a part approaches.

  By comprising in this way, the said fastening band can be comprised easily.

  The present invention eliminates the need for large molds and large-scale manufacturing facilities like conventional cylindrical universal joints, and suppresses depreciation costs related to mold costs and manufacturing equipment costs, thereby suppressing an increase in manufacturing costs. It can be set as the made cylindrical universal joint.

It is the side view which abbreviate | omitted description of the ring-shaped member and the fastening band when the straight pipe | tube form using the cylindrical universal joint which concerns on this embodiment is seen from the side surface of a cylinder direction. It is principal part sectional drawing which shows the state before connecting the connection port of the other tubular member with respect to the connection port of one tubular member. It is a principal part sectional side view which shows the state which connected the connection port of the other tubular member with respect to the connection port of one tubular member. In FIG. 2B, it is a principal part sectional side view which shows the state which connected the connection port of the other tubular member to the connection port of one tubular member by rotating 180 degree | times around the central axis of the tubular member. The tubular member of the cylindrical universal joint which concerns on this embodiment is shown, (a) Side view, (b) The figure of the central axis view of a tubular member, (c) From the direction inclined 1st angle with respect to the central axis of a tubular member FIG. It is the side view which abbreviate | omitted description of the ring-shaped member and the fastening band when the elbow form using the cylindrical universal joint which concerns on this embodiment is seen from the side surface of a cylinder direction. It is a perspective view of the fastening band with which the cylindrical universal joint which concerns on this embodiment is provided. It is an expanded view of the tubular member which comprises the cylindrical universal joint which concerns on this embodiment.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

As shown in FIG. 1, the tubular universal joint 0 </ b> A is configured by connecting a plurality of tubular members 01 in a tubular shape.
The tubular member 01 constituting the tubular universal joint 0A has connection ports 10 at both ends thereof, and the connection ports 10 provided in the plurality of tubular members 01 can be butt-coupled so as to be slidably rotatable. A case where a plurality of (five) tubular members 01 are connected in a cylindrical shape so as to form a straight pipe is illustrated in FIG.
In FIG. 1, the first connection joint 71 is connected to an exhaust connection port of a ventilation device such as a range hood, and the second connection joint 72 is connected to an external exhaust connection port attached to a wall of the building. The

As shown in FIG. 3 (a), the tubular member 01 mainly has a hexagonal cylinder whose section extending in the direction of the central axis 02 and perpendicular to the central axis 02 is a hexagon as shown in FIG. 2 (b). It is said.
The tubular member 01 is formed using, for example, a stainless steel plate or a galvanized steel plate having a thickness of 0.6 mm.

As the connection port 10, a first connection port 11 is provided on one end side of the tubular member 01, and a second connection port 12 is provided on the other end side of the tubular member 01.
The first connection port 11 is inclined at a predetermined first angle 51 (= θ / 2) with respect to a surface 50 (not shown) orthogonal to the central axis 02, and the second connection port 12 is orthogonal to the central axis 02. A predetermined second angle 52 (= −θ / 2) is inclined with respect to the surface 50 (not shown) having the same absolute value as the predetermined first angle 51 and opposite to the predetermined first angle 51.

As shown in FIG. 2B, the tubular member 01 is formed in a substantially V shape in a side view, and includes a first connection port 11 and a second connection port 12 with butt connection portions 03 respectively.
And as shown in FIG.3 (c), the 1st connection port 11 and the 2nd connection port 12 are formed in the regular polygon (in this embodiment, regular hexagon) of the same shape.
The surface connecting the corresponding sides in the regular polygon (regular hexagon) on the first connection port 11 side and the regular polygon (regular hexagon) on the second connection port 12 side is the main body of the tubular member 01. A line that configures a polygonal cylinder and connects corresponding vertices in the regular polygon (regular hexagon) on the first connection port 11 side and the regular polygon (regular hexagon) on the second connection port 12 side is a tubular member. The ridgeline of the polygonal cylinder which is the main body of 01 is comprised.
In this embodiment, θ is set to 30 degrees.

In the present embodiment, the flange portion 21 extends around the connection port 10 in a direction away from the central axis 02 of the tubular member 01. (See FIGS. 1, 2A, and 4.) The flange portion 21 is formed in an annular shape that surrounds the connection port 10.
The ring-shaped member 31 disposed so as to surround the periphery of the connection port 10 on the side of the flange portion 21 where the tubular member 01 exists and the flange portion 21 constitute a butt connection portion 03.

  In the present embodiment, the ring-shaped member 31 provided in both the butt connection portions 03 in a state where the connection port 10 having the butt connection portion 03 and the connection port 10 having the butt connection portion 03 are butt-connected. A tightening band 41 (see FIG. 5) is provided that acts in a direction in which the butt connection portions 03 provided in both the connection ports 10 are brought into pressure contact with each other.

As shown in FIGS. 2B, 2C, and 5, the tightening band 41 is formed in a form including a U-shaped accommodating portion 44 that is U-shaped in cross section and widens toward the open end on the inner diameter side.
The tightening band 41 is provided with a screw 42, and the diameter of the tightening band 41 is reduced by rotating the screw 42 clockwise.

Therefore, in a state where the connection port 10 having the butt connection portion 03 and the connection port 10 having the butt connection portion 03 are butt-connected, the ring-shaped member 31 provided in both the butt connection portions 03 includes the tightening band. When the tightening band 41 is tightened by rotating the screw 42 clockwise while being accommodated in the accommodating portion 44 from the opening 43 of the 41, a ring shape provided in both the butted connection portions 03 in the accommodating portion 44. A force acts in a direction in which the distance between the members 31 approaches.
In other words, the screws 42 are rotated clockwise while the ring-shaped members 31 included in both the butting connection portions 03 are housed in the housing portion 44 from the opening 43 of the fastening band 41, so The connecting portions 03 are pressed together and fixed.

For example, after the tubular member 01 is arranged as shown in FIG. 2A, the tightening band 41 is put on the ring-shaped member 31 provided in both the butt connecting portions 03 to obtain the state shown in FIG. Is rotated in the clockwise direction so that both butt connecting portions 03 are pressed and fixed to each other, and an elbow that is bent at 60 degrees can be obtained.
Further, for example, by arranging three tubular members 01 as shown in FIG. 4, an elbow that is bent at 90 degrees can be obtained.
In FIG. 4, the ring-shaped member 31 and the fastening band 41 are not shown.

Moreover, a straight pipe is obtained by arranging the tubular member 01 as shown in FIG. 2C.
For example, a long straight pipe can be obtained by arranging five tubular members 01 as shown in FIG.

  Although not shown in the drawings, various types of tubular universal joints 0A can be obtained by arranging a plurality of tubular members 01 by appropriately rotating them around the central axis 02 thereof. Thereby, it is possible to cope with a misalignment in the connection direction between the exhaust connection port of the range hood and the external exhaust connection port to the outside.

Incidentally, the developed view of the hexagonal cylinder that is the main body of the tubular member 01 has the shape shown in FIG. 6, for example, and a metal plate (for example, a stainless steel plate, a galvanized steel plate, etc.) cut into the shape shown in FIG. The hexagonal cylinder which is the main body of the tubular member 01 can be formed by bending the hexagonal column and joining the joints 05 together by seam welding or the like, so that a large mold or a large production facility is not required.
In FIG. 6, the bent portions that become ridge lines are indicated by broken lines.

Moreover, the collar part 21 formed in an annular | circular shape can be joined to the connection port 10 by well-known means, such as seam welding.
In addition, the metal plate (for example, a stainless steel plate, a galvanized steel plate, etc.) cut out in the shape shown in FIG. After forming the hexagonal cylinder that is the main body of the tubular member 01 by joining, etc., a portion that becomes the collar portion 21 provided in advance is extended around the connection port 10 by ironing or hammering. It is also possible.

  The regular polygon on the first connection port 11 side and the regular polygon on the second connection port 12 side do not have to be regular hexagons, but are regular octagons, regular decagons, regular pentagons, and regular polygons with 16 or more corners. It may be square.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.

01 Tubular member 02 Center shaft 03 Butt joint portion 05 Joint portion 10 Joint port 11 First joint port 12 Second joint port 21 Gutter portion 31 Ring-shaped member 41 Tightening band 42 Screw 43 Opening 44 Housing portion 50 Directly to the central axis Surface 51 First angle 52 Second angle 71 First connection joint 72 Second connection joint OA Cylindrical universal joint

Claims (4)

A cylindrical universal joint formed by connecting a plurality of tubular members having a connection port at both ends, which are butt-coupled so as to be slidable and rotatable,
The tubular member is mainly a polygonal cylinder having a polygonal cross section extending in the direction of the central axis and perpendicular to the central axis,
As the connection port, a first connection port is provided on one end side of the tubular member, and a second connection port is provided on the other end side of the tubular member,
The first connection port is inclined at a predetermined first angle (θ / 2) with respect to a plane perpendicular to the central axis;
A predetermined second angle (−θ / 2) having the same absolute value as that of the predetermined first angle and a direction opposite to the predetermined first angle with respect to a surface of the second connecting port perpendicular to the central axis. Inclined, the tubular member is formed in a substantially V shape in side view,
Each of the first connection port and the second connection port has a butt connection part,
The first connection port and the second connection port are formed in a regular polygon of the same shape,
A surface connecting corresponding sides in the regular polygon on the first connection port side and the regular polygon on the second connection port side constitutes the polygonal cylinder,
A line connecting vertices corresponding to each other in the regular polygon on the first connecting port side and the regular polygon on the second connecting port side forms a ridge line of the polygonal cylinder. Universal joint. A flange extending to the connection port in a direction away from the central axis;
2. The cylindrical shape according to claim 1, wherein a ring-shaped member disposed so as to surround the connection port on a side where the tubular member is present of the flange portion constitutes the butt connection portion. Universal joint.   In a state where the connection port having the butt connection portion and the connection port having the butt connection portion are butt-connected, the ring-shaped members included in both the butt connection portions act in a direction in which they approach each other. The cylindrical universal joint according to claim 2, further comprising a tightening band that press-contacts the butt connection portions provided in both of the connection ports.   The fastening band is formed in a form having a U-shaped storage section in a cross-sectional view that widens toward the open end on the inner side of the diameter, and the connection port having the butt connection part and the butt connection part When the tightening band is tightened in a state where the ring-shaped members included in both the butt connection portions are accommodated in the accommodation portion in the state where the connection port having the butt connection, the inside of the accommodation portion The cylindrical universal joint according to claim 3, wherein a force acts in a direction in which a distance between ring-shaped members provided in both the butted connection portions approaches.

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