JP7087734B2 - Coupling pin attachment / detachment jig and connection pin attachment / detachment method - Google Patents

Description

The present invention relates to a coupling pin attachment / detachment jig and a connection pin attachment / detachment method.

For example, as a structure for separably connecting a plurality of members, a structure in which a coupling pin is inserted into a coupling hole formed in an overlapping portion of the plurality of members is widely adopted. As an example, the components of a crane attachment such as a boom, jib, strut, etc. used in a large crane are skeletons each having four main girders arranged in parallel and multiple auxiliary girders connecting the main girders. It is formed by connecting a plurality of square tubular lattice structures in the longitudinal direction using a connecting pin.

To explain the connection structure of this lattice structure in detail, generally, a female connector or a male connector is arranged at the end of the main girder of each lattice structure, and the female connector and the male connector are arranged. The lattice structures are connected by fitting and inserting a coupling pin so as to penetrate the female connector and the male connector in the lateral direction. Usually, the female connectors are arranged parallel to each other and have a pair of plate-shaped protrusions having pin holes formed coaxially. On the other hand, the male connector has a plate-shaped protrusion inserted between a pair of protrusions of the female connector and having a pin hole formed coaxially with the pin hole of the female connector.

In a large crane, the connector and the coupling pin are also quite large, so it is not easy to insert and remove the coupling pin. Therefore, for example, in Japanese Patent Publication No. 57-181789, a screw rod is provided on the head of the coupling pin so as to extend in the axial direction in order to easily insert and remove the coupling pin, and the outer surface of the protrusion of the female connector is provided. A coupling device has been proposed in which a casing capable of accommodating a coupling pin is provided, and a nut screwed to the screw rod is rotatably provided on a wall on the outer surface side of the casing. In this coupling device, by rotating the nut, the screw rod can be moved in the axial direction to insert and remove the coupling pin.

In the coupling device described in the above publication, it is necessary to rotate the nut using a spanner or the like, but since a considerable number of rotations are required to insert and remove the coupling pin, the work of rotating the nut is complicated. be. In particular, when the connector and the coupling pin are large, the size of the screw rod and the nut is also large, so it is difficult to obtain a tool such as a wrench having a ratchet mechanism with an applicable size, and the coupling pin can be sufficiently inserted and removed. It cannot be facilitated.

Further, the coupling device described in the above publication needs to be firmly attached to each female connector by using a bolt or the like. It is not impossible to attach and detach the coupling device to the connector each time the coupling pin is inserted and removed, but with a large crane, the weight of the corresponding coupling device also becomes heavy, and the work of positioning and bolting heavy objects at a high position Is required. Therefore, it is extremely complicated and impractical to attach and detach the female connector every time the coupling device described in the above publication is used.

Further, although a device for inserting a coupling pin using a hydraulic cylinder has been put into practical use, a hydraulic source is required and the connection work of the hydraulic line is complicated.

Jitsukaisho 57-181789 Gazette

In view of the above inconvenience, it is an object of the present invention to provide a coupling pin attachment / detachment jig and a coupling pin attachment / detachment method in which a coupling pin can be easily inserted / removed.

The coupling pin attachment / detachment jig according to one aspect of the present invention, which has been made to solve the above problems, is a female mold having a pair of female side protrusions arranged so as to face each other and having a coaxial female side pin hole formed therein. To attach / detach a connector and a male connector having a male protrusion inserted between the pair of female protrusions and having a male pin hole formed coaxially with the female pin hole. A coupling pin attachment / detachment jig for inserting and removing a coupling pin into the female side pin hole and the male side pin hole, and the female side pin hole and the female side pin hole on the outer surface of the female side protrusion of one of the female type connectors. The first engaging portion that abuts to open its peripheral edge and the second engaging portion that abuts to open the female side pin hole and its peripheral edge to the outer surface of the female side protrusion on the other side of the female connector. A connection portion that connects the portion, the first engaging portion and the second engaging portion, and is placed on the upper surface of at least one of the female connector and the male connector, and the female pin hole and the female side pin hole. A holding portion formed by penetrating a screw hole coaxial with the male side pin hole and arranged at a distance on the side opposite to the first engaging portion of the second engaging portion, and a second engaging portion. It is characterized by including a support portion extending from the joint portion or the connection portion and supporting the holding portion, and a push bolt screwed into the screw hole.

In the coupling pin attachment / detachment jig, the connection portion is connected to the female connector and the male mold in a state where the first engaging portion and the second engaging portion are in contact with the outer surfaces of the pair of female side protrusions. By placing it on the upper surface of at least one of the connectors, the push bolt held by the holding portion can be coaxially arranged outside the head of the coupling pin arranged outside the female pin hole. Then, by rotating the push bolt in the screwing direction, the coupling pin can be inserted into the female side pin hole and the male side pin hole. Further, the coupling pin attachment / detachment jig is engaged with the female connector so that the push bolt is arranged outside the tip of the coupling pin inserted into the female pin hole and the male pin hole. For example, the coupling pin can be pushed out from the female side pin hole and the male side pin hole by screwing the push bolt. Since the push bolt can be screwed in easily and quickly using a tool such as an impact wrench, the coupling pin can be easily and quickly screwed into the female side pin hole and the male side pin hole by using the coupling pin attachment / detachment jig. Can be easily inserted and removed. Further, since the coupling pin attachment / detachment jig can be used only by placing it on the female connector and the male connector, it is not necessary to provide each of the female connectors, and a plurality of sets of the female connectors are used. The type connector and the above-mentioned male type connector can be connected sequentially. Therefore, by using the coupling pin attachment / detachment jig, the connection work can be facilitated without increasing the weight and manufacturing cost of the members to be connected.

In the coupling pin attachment / detachment jig, the push bolt may have a contact member provided at the tip thereof so as to be rotatable around an axis. In this way, by having the push bolt having a contact member rotatably provided around the axis at the tip, the friction between the push bolt and the coupling pin is reduced, and the torque required for screwing the push bolt is reduced. Can be reduced.

In the coupling pin attachment / detachment jig, the contact member may be provided so as to be tiltable with respect to the shaft of the push bolt. In this way, by providing the contact member so as to be tiltable with respect to the shaft of the push bolt, the friction between the push bolt and the coupling pin can be reduced more reliably.

The coupling pin attachment / detachment jig is parallel to a pair of plate-shaped bodies having the first engaging portion, the second engaging portion, the connecting portion, and the supporting portion, respectively, with the plate-shaped bodies spaced apart from each other. It may be provided with a holding body. In this way, a pair of plate-shaped bodies having the first engaging portion, the second engaging portion, the connecting portion, and the supporting portion, respectively, and a connecting body that holds the plate-shaped bodies in parallel at intervals. It is easy to reduce the weight of the coupling pin attachment / detachment jig, and the coupling pin attachment / detachment jig can be manufactured at a relatively low cost.

The coupling pin attachment / detachment method according to one aspect of the present invention includes a step of engaging the coupling pin attachment / detachment jig with the female connector and screwing the push bolt with an impact wrench to engage the coupling pin in the axial direction. It is provided with a step of pushing it in and inserting and removing it into the female side pin hole and the male side pin hole.

In the method of attaching / detaching the coupling pin, since the push bolt of the coupling pin attachment / detachment jig is screwed in using an impact wrench, the coupling pin can be easily inserted into and removed from the female side pin hole and the male side pin hole.

In the coupling pin attachment / detachment jig and the coupling pin attachment / detachment method according to the present invention, the coupling pin can be easily inserted / removed.

It is a schematic perspective view which shows the coupling pin attachment / detachment jig of one Embodiment of this invention. It is a schematic plan view which shows the start of insertion of the coupling pin by the coupling pin attachment / detachment jig of FIG. It is a schematic cross-sectional view which shows the start of insertion of the coupling pin by the coupling pin attachment / detachment jig of FIG. It is a schematic front view (first engaging portion side elevation view) which shows the start of insertion of the coupling pin by the coupling pin attachment / detachment jig of FIG. FIG. 3 is a schematic plan view of a lattice structure connected by a coupling pin using the coupling pin attachment / detachment jig of FIG. 1 in an inverted state (direction when the coupling pin is inserted / removed). It is a schematic cross-sectional view which shows the time when the coupling pin insertion by the coupling pin attachment / detachment jig of FIG. 1 is completed. FIG. 3 is a schematic cross-sectional view showing the start of extrusion of the coupling pin of the coupling pin attachment / detachment jig of FIG. It is a schematic cross-sectional view which shows the time when the coupling pin extrusion of the coupling pin attachment / detachment jig of FIG. 1 is completed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Joining pin attachment / detachment jig]
FIG. 1 shows a coupling pin attachment / detachment jig 10 according to an embodiment of the present invention.

As shown in FIGS. 2 to 4, the coupling pin attachment / detachment jig 10 connects the female connector 1 and the male connector 2 with the coupling pin 3, or connects the female connector 1 and the male connector 2 with the coupling pin 3. Used to extract and separate.

The female connector 1 is arranged so as to face each other, and a pair of female side protrusions (the first female side protrusion 5a on the axial tip side of the coupling pin 3 and the opposite side) are formed with the coaxial female side pin holes 4. It has a second female side protrusion 5b). The male connector 2 has a male protrusion 7 inserted between a pair of female protrusions 5a and 5b and formed with a male pin hole 6 arranged coaxially with the female pin hole 4. The coupling pin 3 is provided at one end of the shaft portion 8 inserted into the female side pin hole 4 and the male side pin hole 6 and the shaft portion 8, and has an outer diameter of the female side pin hole 4 and the male side pin hole 6. It has a head 9 larger than the inner diameter.

As shown in FIG. 5, the connection between the female connector 1 and the male connector 2 by the coupling pin 3 is for connecting a plurality of lattice structures constituting a boom, jib, strut, etc. of a crane, for example. Widely used.

The coupling pin attachment / detachment jig 10 includes a pair of first engaging portions 11 that abut against the outer surface of one female side protrusion 5a of the female connector 1 so as to open the female side pin 4 hole and its peripheral edge. A pair of second engaging portions 12 that abut against the outer surface of the other female side protrusion 5b of the female connector 1 so as to open the female side pin hole 4 and its peripheral edge, and the first engaging portion 11 and the second. The engaging portions 12 are connected to each other, and the pair of connecting portions 13 mounted on the upper surface of at least one of the female connector 1 and the male connector 2 are coaxial with the female pin hole 4 and the male pin hole 6. One holding portion 15 formed through the screw hole 14 and spaced apart from the first engaging portion 11 of the second engaging portion 12 and extending from the second engaging portion 12. A pair of support portions 16 that sandwich and support the holding portion 15 and one push bolt 17 that is screwed into the screw hole 14 are provided.

As shown in FIG. 3, the coupling pin attachment / detachment jig 10 aligns the female connector 1 and the male connector 2 so that the female pin hole 4 and the male pin hole 6 are coaxial with each other. With the tip of the coupling pin 3 inserted in the female side protrusion 5b, the coupling pin 3 is engaged with the female connector 1 and the male connector 2 and the push bolt 17 is screwed in as shown in FIG. Can be pushed in.

Further, as shown in FIG. 7, the coupling pin attachment / detachment jig 10 is inserted into the female side pin hole 4 and the male side pin hole 6 to connect the female connector 1 and the male connector 2. By engaging the female connector 1 and the male connector 2 so as to dispose the push bolt 17 on the tip side of the push bolt 17, the coupling pin 3 is screwed into the female side pin hole 4 and the female side pin hole 4 as shown in FIG. It can be extruded from the male side pin hole 6.

To explain the structure of the coupling pin attachment / detachment jig 10 of the embodiment shown in FIG. 1 in more detail, the coupling pin attachment / detachment jig 10 has a first engagement portion 11, a second engagement portion 12, a connection portion 13, and a support, respectively. A pair of plate-shaped bodies 18 having a portion 16 and a plate-shaped connecting body 19 that connects between the connecting portions 13 of the pair of plate-shaped bodies 18 and holds the pair of plate-shaped bodies 18 in parallel are provided.

By connecting the pair of plate-shaped bodies 18 with the connecting body 19 in this way, the coupling pin attachment / detachment jig 10 can be easily reduced in weight and can be manufactured at a relatively low cost. can.

As shown in FIGS. 2 and 4, the distance between the pair of plate-shaped bodies 18 is larger than the outer diameter of the head 9 of the coupling pin 3. That is, the coupling pin attachment / detachment jig 10 is configured so that the head portion 9 of the coupling pin 3 can be arranged between the pair of plate-shaped bodies 18.

<First engaging part>
As shown in FIG. 2, the pair of first engaging portions 11 are configured to be arranged on the left and right sides of the female side pin holes 4 of the first female side protrusion 5a on the side where the tip end side of the coupling pin 3 is inserted. ing.

The first engaging portion 11 is located at a position lower than the center of the female side pin hole 4 so that the coupling pin attachment / detachment jig 10 can firmly hold the first female side protrusion 5a when the coupling pin 3 is pushed in. It is preferable that it extends downward so that it can be in contact with it.

Further, the first engaging portion 11 has a tapered portion at the lower end portion that gradually increases the distance from the first engaging portion 11 in order to facilitate engagement with the female connector 1. May be good.

<Second engaging part>
As shown in FIG. 3, the pair of second engaging portions 12 may be arranged on both sides of the female side pin holes 4 of the second female side protrusion 5b on the side where the head 9 side of the coupling pin 3 is inserted. It is configured to be able to.

The second engaging portion 12 has a second female side protrusion 5b so that the coupling pin attachment / detachment jig 10 can be engaged with the female connector 1 without being tilted by the weights of the holding portion 15 and the supporting portion 16. It is preferable that the second female side protrusion 5b extends downward to the same extent as or more than the width in the vertical direction so as to abut on the lower end portion of the outer surface of the second female side protrusion 5b.

The distance between the first engaging portion 11 and the second engaging portion 12 is the distance between the outer surfaces of the female side protrusions 5a and 5b of the female connector 1 so that the female connector 1 can be engaged with the female connector 1 as little as possible. It is preferable that the degree is slightly larger than that.

<Connection part>
In the connecting portion 13, the first engaging portion 11 and the second engaging portion 12 are spaced so as to be engaged with the outside of the female side protrusions 5a and 5b of the female connector 1, and the female connector 1 and the male connector 1 are formed. By abutting on at least one upper surface of the connector 2, it is possible to maintain the coupling pin attachment / detachment jig 10 in a state of being engaged with the female connector 1 from above.

In the illustrated embodiment, one of the pair of connecting portions 13 is mounted on the upper surface of the female connector 1 and the other of the pair of connecting portions 13 is mounted on the upper surface of the male connector 2 (see FIG. 4). For example, even if the connecting body 19 alone or integrally with the pair of plate-shaped bodies 18 forms a single connecting portion 13 that continuously contacts the upper surface of the female connector 1 up to the upper side of the female side pin hole 4. good. In this way, the connection portion 13 abuts on the upper portion of the female side pin hole 4 of the female connector 1 so that the coupling pin attachment / detachment jig 10 engages with the female connector 1 before positioning the male connector 2. It becomes possible to match.

<Holding part>
In the holding portion 15, the first engaging portion 11 and the second engaging portion 12 are brought into contact with the outer surfaces of the female side protrusions 5a and 5b, and the connecting portion 13 is placed on the upper surfaces of the female connector 1 and the male connector 2. With the coupling pin attachment / detachment jig 10 mounted and engaged with the female connector 1, the push bolt 17 screwed into the screw hole 14 is held coaxially with the female pin hole 4 and the male pin hole 6. Arranged so that it can be done.

Therefore, the screw hole 14 has a sufficient length so that the direction of the push bolt 17 can be accurately determined. The holding portion 15 may be formed by attaching a nut to a thin plate material, but in order to form the screw hole 14 in the correct orientation, the holding portion 15 forms the screw hole 14 in a material having sufficient thickness. It is preferable that the product is made.

Further, the holding portion 15 is provided from the second engaging portion 12 so that the tip of the push bolt 17 can be arranged further outside the head of the coupling pin 3 having the tip inserted into the second female side protrusion 5b. Arranged at intervals.

<Support part>
The support portion 16 extends from the second engaging portion 12 or the connecting portion 13 and supports the holding portion 15 in the position as described above.

<Push bolt>
The tip of the push bolt 17 is located on the side of the first engaging portion 11 and the second engaging portion 12, and the head of the push bolt 17 is on the side opposite to the first engaging portion 11 and the second engaging portion 12 of the holding portion 15. Screw into the screw hole 14 so that it is located.

The shape of the head of the push bolt 17 may be any shape as long as the push bolt 17 can be rotated by a tool, and it is preferable to adopt the shape and dimensions of the head of a general hexagon bolt. Tools for hexagon bolts are widely distributed for relatively large diameters, and sockets that can be used for impact wrenches are particularly easy to obtain. Further, the head of the push bolt 17 may have a square hole into which the square drive (convex insertion portion) of the impact wrench is directly engaged.

Further, since the push bolt 17 requires a smaller torque than the diameter of the threaded portion as compared with a normal fastening bolt, the head for a hexagon bolt having a nominal diameter smaller than the diameter of the threaded portion. It may have the shape of. Conversely, for the push bolt 17, a threaded portion having a nominal diameter larger than the nominal diameter of an available tool can be adopted to prevent bending of the threaded portion.

It is preferable that the push bolt 17 is provided at the tip thereof at least rotatably around an axis and has a contact member 20 that abuts on the coupling pin 3. Further, it is more preferable that the contact member 20 is provided so as to be tiltable with respect to the axis of the push bolt 17. Specifically, it is preferable that the contact member 20 is connected to the tip of the threaded portion of the push bolt 17 by a ball joint. That is, the contact member 20 can be configured to have a spherical seat that engages with a sphere provided at the tip of the threaded portion of the push bolt 17.

As described above, since the push bolt 17 has a rotatable, more preferably tiltable contact member 20 at the tip thereof, the attachment of the coupling pin attachment / detachment jig 10 to the female connector 1 is slightly displaced. Even in this case, the friction between the push bolt 17 and the coupling pin 3 can be reduced to reduce the torque required for screwing the push bolt 17.

[How to attach / detach the coupling pin]
One embodiment of the coupling pin attachment / detachment method according to the present invention uses the coupling pin attachment / detachment jig 10 of FIG. Specifically, the coupling pin attachment / detachment method includes a step of engaging the coupling pin attachment / detachment jig 10 with the female connector 1 <engagement step> and a coupling pin by screwing a push bolt 17 using an impact wrench. A step of pushing 3 in the axial direction and inserting and removing it into the female side pin hole 4 and the male side pin hole 6 is provided.

When inserting the coupling pin 3 into the female side pin hole 4 and the male side pin hole 6, the head 9 of the coupling pin 3 is pushed in the axial direction by the coupling pin attachment / detachment jig 10, and the female side pin hole 4 and the male side are inserted. When the coupling pin 3 is pulled out from the side pin hole 6, the shaft portion 8 of the coupling pin 3 is pushed in the axial direction by the coupling pin attachment / detachment jig 10.

<engagement process>
In the engaging step, the female connector 1 and the male connector 2 are fitted to each other so that the female pin hole 4 and the male pin hole 6 are coaxial with each other, and the coupling pin attachment / detachment jig 10 is female from above. Engage with mold connector 1. The coupling pin attachment / detachment jig 10 is held by the female connector 1 with the first engaging portion 11, the second engaging portion 12, and the connecting portion 13 in contact with the female connector 1.

When inserting the coupling pin 3, as shown in FIG. 3, the holding portion 15 is further outside the head 9 of the coupling pin 3 whose tip is inserted into the female side pin hole 4 of the second female side protrusion 5b. The coupling pin attachment / detachment jig 10 is oriented in the direction of arrangement. At this time, the push bolt 17 is set so as to project largely outward so as not to interfere with the coupling pin 3.

When the coupling pin 3 is pulled out, as shown in FIG. 7, the coupling pin is arranged in a direction in which the holding portion 15 is arranged on the tip end side of the coupling pin 3 inserted into the female side pin hole 4 and the male side pin hole 6. Orient the attachment / detachment jig 10.

<Insert / extraction process>
In the insertion / extraction step, the push bolt 17 is rotated and screwed in by an impact wrench, and the coupling pin 3 is pressed toward the first female side protrusion 5a to push the coupling pin 3 into the female side pin hole 4 and the male side pin hole 6. Insert into (see FIG. 6) or push the coupling pin 3 out of the female side pin hole 4 and the male side pin hole 6 (see FIG. 8).

<Advantage>
As described above, in the coupling pin attachment / detachment jig 10 and the coupling pin attachment / detachment method according to the present invention, the coupling pin 3 can be inserted into and removed from the female side pin hole 4 and the male side pin hole 6 using an impact wrench. The female connector 1 and the male connector 2 can be attached and detached relatively easily.

Further, since the coupling pin attachment / detachment jig 10 can be used only by placing it on the female connector 1 and the male connector 2, it can be separated from the lattice structure except during the attachment / detachment work. Therefore, the coupling pin attachment / detachment jig 10 does not increase the weight of each lattice structure, and thus does not reduce the lifting capacity of the crane. Further, since the coupling pin attachment / detachment jig 10 can attach / detach a plurality of sets of the female connector 1 and the male connector 2 with only one, the cost can be reduced.

[Other embodiments]
The embodiments do not limit the configuration of the present invention. Accordingly, embodiments may be omitted, replaced or added to components of each embodiment based on the description and common sense of the art, all of which should be construed as belonging to the scope of the invention. be.

In the coupling pin attachment / detachment jig of the embodiment, the connecting portions of the pair of plate-shaped bodies are connected by a connecting body, but in addition to or in place of this, the connecting body is a female of the pair of plate-shaped bodies. Other parts that do not interfere with the mold connector, male connector and coupling pin may be connected.

Further, the coupling pin attachment / detachment jig of the embodiment includes a pair of first engaging portions and a pair of second engaging portions arranged with the female side pin hole interposed therebetween, and the coupling pin attachment / detachment jig according to the present invention. The first engaging portion and the second engaging portion of the above may be a single structure in which a male side pin hole and a notch for opening the peripheral edge thereof are formed, respectively. Further, the support portion may also be a single structure.

Further, in the coupling pin attachment / detachment jig according to the present invention, the support portion may extend from the connection portion. Further, the support portion may support the holding portion cantilever.

As the coupling pin attachment / detachment jig according to the present invention, a coupling pin insertion-dedicated product and a coupling pin extrusion-dedicated product may be provided separately. The length of the support portion and the push bolt can be reduced by separately providing the insertion pin insertion-only product and the extrusion-only product. In particular, by reducing the length of the push bolt, the push bolt is less likely to bend even if the diameter of the push bolt is reduced, so that the choice of applicable tools can be expanded.

The coupling pin attachment / detachment jig according to the present invention may be provided with a fixing mechanism that can be fixed to the female connector. Such a fixing mechanism is provided, for example, through a first engaging portion or a second engaging portion, and a fixing screw whose tip can be pressed against the outer surface of the female side protrusion, extends laterally from the support portion. Ancillary structures that can be taken out and engaged with a member (for example, a lattice structure) provided with a female connector can be mentioned. Further, the coupling pin attachment / detachment jig according to the present invention may be provided with a safety belt (a female connector or a rope connected to a member provided with the female connector) in case of dropping from the female connector. good. Further, in order to prevent the coupling pin attachment / detachment jig according to the present invention from falling, a receiving member for holding the coupling pin attachment / detachment jig may be arranged on the female connector.

The coupling pin attachment / detachment jig and the coupling pin attachment / detachment method according to the present invention can be particularly suitably used for inserting / removing a large coupling pin, and particularly for assembling and disassembling a boom, jib, strut, etc. of a large crane.

1 Male connector 2 Female connector 3 Coupling pin 4 Female side pin hole 5a, 5b Female side protrusion 6 Male side pin hole 7 Male side protrusion 8 Shaft 9 Head 10 Coupling pin attachment / detachment jig 11 1st engagement Part 12 Second engaging part 13 Connecting part 14 Screw hole 15 Holding part 16 Support part 17 Push bolt 18 Plate-shaped body 19 Connector 20 Contact member

Claims (4)

It is inserted between a female connector having a pair of female side protrusions arranged facing each other and having a coaxial female side protrusion and the pair of female side protrusions, and is coaxial with the female side protrusion. A coupling pin attachment / detachment jig for inserting / removing a coupling pin into the female side pin hole and the male side pin hole in order to attach / detach the male connector having the male side protrusion formed in the male side pin hole. And,
A first engaging portion that abuts on the outer surface of one of the female connectors so as to open the female pin hole and its peripheral edge.
A second engaging portion that abuts on the outer surface of the other female side protrusion of the female connector so as to open the female side pin hole and its peripheral edge.
A connecting portion that connects between the first engaging portion and the second engaging portion and is placed on the upper surface of at least one of the female connector and the male connector.
A holding portion formed by penetrating the female side pin hole and the screw hole coaxial with the male side pin hole, and arranged at intervals on the opposite side of the second engaging portion from the first engaging portion. When,
A support portion extending from the second engaging portion or the connecting portion and supporting the holding portion, and a support portion.
Equipped with a push bolt to screw into the above screw hole ,
A pair of plate-shaped bodies having the first engaging portion, the second engaging portion, the connecting portion, and the supporting portion, respectively, and a connecting body for holding the plate-shaped bodies in parallel at intervals are further provided. A jig for attaching and detaching a coupling pin. The coupling pin attachment / detachment jig according to claim 1, wherein the push bolt has a contact member rotatably provided around an axis at the tip thereof. The coupling pin attachment / detachment jig according to claim 2, wherein the contact member is provided so as to be tiltable with respect to the shaft of the push bolt. The step of engaging the coupling pin attachment / detachment jig according to any one of claims 1 to 3 with the female connector,
A method for attaching and detaching a coupling pin, comprising a step of pushing the coupling pin in the axial direction by screwing the push bolt with an impact wrench and inserting and removing the coupling pin into the female side pin hole and the male side pin hole.

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