JP2023144176A - Rod-like body holding instrument - Google Patents

Abstract

To provide a rod-like body holding instrument capable of having a rod-like body attached/detached through easier operation.SOLUTION: When a rod-like body holding instrument 100 has second metal fittings 20 pivoted rotatably on first metal fittings 10 having a rod-like body reception part 11, a front plate part 12 and a rear plate part 13, the second metal fittings 20 are rotated down by the gravity after a pipe P is mounted on the first metal fittings 10 with the second metal fittings 20 put apart from the first metal fittings 10 to be closed approaching the first metal fittings 10, and then the pipe P can be held with the first metal fittings 10 and second metal fittings 20 to be attached to the rod-like body holding instrument 100. When the pipe P held with the first metal fittings 10 and second metal fittings 20 is detached from the rod-like body holding instrument 100, the second metal fittings 20 are rotated reversely in the gravitationally lowering direction to be opened to be apart from the first metal fittings 10, and then the pipe P can be detached from the rod-like body holding instrument 100.SELECTED DRAWING: Figure 5

Description

The present invention relates to a rod-shaped body holding device used when installing a rod-shaped body such as a circular tube or cylinder having a substantially circular cross-sectional view at a predetermined location.

Conventionally, as a metal fitting used for fixing a pipe at a predetermined location, a pipe clamp metal fitting is known which is equipped with a pair of holding pieces, one end of which is pivotally connected and the other end of which can be opened and closed. For example, see Patent Document 1).
A fastener equipped with a nut is provided at the other end of the pair of holding pieces of the pipe clamp fitting.
Then, set the pipe between a pair of holding pieces of the pipe clamp fitting fixed at a predetermined location, and tighten the nut of the fastener so that the holding pieces do not open. The pipe can be installed at a predetermined location via the clamp fitting.
The pipe (single pipe) installed at a predetermined location in this way is used as a support point for various purposes such as a scaffolding structure, for example.

Japanese Patent Application Publication No. 10-37454

However, when attaching and detaching a pipe to the pipe clamp fitting of Patent Document 1, the nut of the fastener must be screwed in and out, which is complicated.
Therefore, the inventors of the present invention have made extensive studies and have developed an instrument that can easily attach and detach rod-shaped bodies such as pipes.

An object of the present invention is to provide a rod-shaped body holding device that allows a rod-shaped body to be attached and detached with a simpler operation.

In order to solve the above problems, the invention according to claim 1,
A rod-shaped body holder comprising a first metal fitting and a second metal fitting rotatably supported by the first metal fitting, the first metal fitting and the second metal fitting holding a rod-shaped body having a substantially circular cross-sectional view. A device,
The first metal fitting is
a rod-shaped body receiving portion on which the rod-shaped body is placed;
a front plate part erected on the front end side of the rod-shaped body receiving part;
a rear plate part that stands higher than the front plate part on the rear end side of the rod-shaped body receiving part, and has the second metal fitting pivotally supported at a position higher than the upper end of the front plate part;
It has a fixing part for fixing the rod-shaped body holding device at a predetermined location,
The second metal fitting is arranged at a position facing the upper surface of the rod-shaped body receiving part when the second metal fitting is rotated in a direction in which the second metal fitting is lowered by its own weight and in a direction approaching the front surface of the rear plate part. It has a rod-shaped body contact part,
When the rod-shaped body is placed on the rod-shaped body receiving portion and the rod-shaped body contact portion is disposed at a position facing the top surface of the rod-shaped body receiving portion, at least the top surface of the rod-shaped body receiving portion and the front surface of the rod-shaped body receiving portion are disposed. The upper end of the plate portion and the front surface of the rear plate portion are configured to contact the side surface of the rod-shaped body,
When the rod-shaped body placed on the rod-shaped body receiving portion abuts the rod-shaped body abutting portion so as to push it up, a reaction occurs in the direction of bringing the second metal fitting closer to the rear plate side. The rod-shaped body is configured to be pushed back toward the rod-shaped body receiving portion.

The invention according to claim 2 is the rod-shaped body holding device according to claim 1,
The distance between the rod-shaped body placed on the rod-shaped body receiving portion and the rod-shaped body abutting portion disposed at a position facing the upper surface of the rod-shaped body receiving portion is from the base end of the front plate portion. It is characterized by being configured to be smaller than the dimension up to the upper end.

The invention according to claim 3 is the rod-shaped body holding device according to claim 1 or 2,
The rod-shaped body placed on the rod-shaped body receiving part contacts the rod-shaped body contacting part so as to push it up, and the rod-shaped body contacts the upper end of the front plate part of the first metal fitting so as to push it forward. When this occurs, a reaction force is generated in the direction of bringing the rod-shaped body closer to the rear plate portion, thereby pushing the rod-shaped body back toward the rod-shaped body receiving portion.

The invention according to claim 4 is the rod-shaped body holding device according to any one of claims 1 to 3,
The second metal fitting has a rotation support part that forms an acute angle with the rod-shaped body contact part and extends from the base end of the rod-shaped body contact part, and The rotation support portion is pivotally supported by the rear plate portion with a proximal end thereof disposed near the rear plate portion,
The free end of the rod-shaped body abutting portion, which is disposed at a position facing the upper surface of the rod-shaped body receiving portion, is configured to face obliquely upward from the rear plate side. shall be.

The invention according to claim 5 is the rod-shaped body holding device according to claim 4,
The angle formed by the rod-shaped body abutting portion and the rotation support portion is 85° or less.

The invention according to claim 6 is the rod-shaped body holding device according to any one of claims 1 to 5,
The fixing portion is provided on the rear surface of the rear plate portion.

According to the present invention, it is possible to obtain a rod-shaped body holding device that allows the rod-shaped body to be attached and detached with a simpler operation.

FIG. 2 is a side view showing the rod-shaped object holding device of the present embodiment. It is a top view (a), a front view (b), and a side view (c) which show the 1st metal fitting of a rod-shaped object holding device. It is a top view (a), a front view (b), and a side view (c) which show the 2nd metal fitting of a rod-shaped object holding device. FIG. 7 is an explanatory diagram regarding a procedure for holding a pipe in a rod-shaped body holding device. FIG. 7 is an explanatory diagram regarding a procedure for holding a pipe in a rod-shaped body holding device. FIG. 3 is a front view showing a mode in which the pipe is held at a predetermined location by a plurality of rod-shaped body holding devices. FIG. 6 is an explanatory diagram regarding the effect of preventing the pipe held by the rod-shaped body holding device from falling off.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a rod-shaped object holding device according to the present invention will be described in detail with reference to the drawings. However, although various limitations that are technically preferable for carrying out the present invention are attached to the embodiments described below, the scope of the present invention is not limited to the following embodiments and illustrated examples.
A rod-shaped object holding device is an instrument used when installing a rod-shaped object, such as a circular tube or cylinder, which has a substantially circular cross-sectional view, at a predetermined location.
In this embodiment, a rod-shaped body holding device for installing a single pipe (rod-shaped body) at a predetermined location, which is used as a support point for various purposes at a work site, for example, will be described.

For example, as shown in FIGS. 1 to 3, the rod-shaped body holding device 100 includes a first metal fitting 10 and a second metal fitting 20 rotatably supported by the first metal fitting 10. The metal fitting 10 and the second metal fitting 20 have a function of holding a rod-shaped object such as a pipe P.
The first metal fitting 10 and the second metal fitting 20 are connected via a hinge 30, and the second metal fitting 20 is rotatably supported by the first metal fitting 10.

The first metal fitting 10 includes a rod-shaped object receiving section 11 on which the pipe P is placed, a front plate section 12 that is erected on the front end side of the rod-like object receiving section 11, and a front plate section 12 installed on the rear end side of the rod-like object receiving section 11. The rear plate part 13 stands higher than the front plate part 12 and has the second metal fitting 20 pivotally supported at a position higher than the upper end of the front plate part 12, and the rod-shaped body holding device 100 is fixed at a predetermined location. It has a fixing part 14 for fixing.

The rod-shaped object receiving part 11, the front plate part 12, and the rear plate part 13 of the first metal fitting 10 constitute the main body of the first metal fitting 10, and the rod-shaped object receiving part is formed by bending a single steel plate. 11, a front plate part 12, and a rear plate part 13 are formed.
Specifically, a relatively short portion on one end of the steel plate is bent at a substantially right angle to form the front plate portion 12, and a relatively long portion on the other end of the steel plate is bent on the same side as the front plate portion 12. A rear plate part 13 is formed by bending at a substantially right angle, and a rod-shaped body receiving part 11 is formed between the front plate part 12 and the rear plate part 13 .
The first metal fitting body, which is composed of the rod-shaped object receiving part 11, the front plate part 12, and the rear plate part 13, has a substantially J-shape when viewed from the side.
For example, when the diameter of the pipe P held by the rod-shaped body holding device 100 is 48.6 mm, the height of the front plate portion 12 of the first metal fitting 10 (dimension from the top surface of the rod-shaped body receiving portion 11) is 10 mm, The height of the rear plate part 13 (dimension from the top surface of the rod-shaped object receiving part 11) is 109 mm, and the dimension between the front plate part 12 and the rear plate part 13 (the length in the front-rear direction of the rod-shaped object receiving part 11) is 44 mm. It is formed to be.
By forming each part of the first metal fitting 10 to the above dimensions, when the pipe P having a diameter of 48.6 mm is placed on the rod-shaped body receiving part 11, the upper surface of the rod-shaped body receiving part 11 and the front plate part 12 The upper end of the pipe P and the front surface of the rear plate portion 13 are in contact with the side surface (peripheral surface) of the pipe P at three locations.
That is, the dimensions of each part of the first metal fitting 10 are designed according to the diameter of the pipe P held by the rod-shaped object holding device 100.

The fixing portion 14 of the first metal fitting 10 is a part made of a steel plate that is integrated with the first metal fitting main body (here, the rear plate portion 13) by welding or the like.
In this embodiment, a pair of left and right fixing portions 14 are provided on the rear surface of the rear plate portion 13 .
This fixing part 14 is disposed perpendicularly to the rear surface of the rear plate part 13 in a direction perpendicular to the rear plate part 13 and the rod-shaped body receiving part 11 .
The fixing part 14 here has an aspect in which an upper corner portion of the end thereof is cut out, and has a substantially pentagonal shape when viewed from the side. Further, the fixing portion 14 is provided with a mounting hole 14a that penetrates in the left-right direction.

The fixing part 14 of this embodiment is designed to correspond to an existing square steel pipe 50 located at a predetermined location at the work site where the pipe P is installed.
The pair of left and right fixing parts 14 are inserted into the square steel pipe 50 along the left and right inner wall surfaces of the square steel pipe 50 and fixed therein.
The mounting holes 14a of the fixing portion 14 are formed to correspond to the positions of the through holes 50a provided in the left and right walls of the square steel pipe 50.
That is, the fixing part 14 of the first metal fitting 10 is designed as appropriate depending on the predetermined location where the pipe P is installed using the rod-shaped object holding device 100, and specifically, depending on the steel pipe, steel material, etc. located at the predetermined location. It is designed accordingly.

The second metal fitting 20 has a rod-shaped body abutting portion 21 and a rotation support portion 22 forming an acute angle with the rod-shaped body abutting portion 21 . The rotation support portion 22 extends from the base end of the rod-shaped body contact portion 21 so as to form an acute angle with the rod-shaped body contact portion 21 .
The second metal fitting 20 is formed by bending a single steel plate so that the rod-shaped body contact portion 21 and the rotation support portion 22 form an acute angle. The second metal fitting 20, which is constituted by the rod-shaped body abutting portion 21 and the rotation support portion 22, has a substantially L-shape when viewed from the side.
Note that the angle θ formed by the rod-shaped body contact portion 21 and the rotation support portion 22 is preferably 85° or less.
If the angle θ formed by the rod-shaped body contact portion 21 and the rotation support portion 22 is 85° or less, when the pipe P abuts the rod-shaped body contact portion 21 so as to push it up, the second metal fitting 20 is This is preferable because a reaction in the direction of approaching the portion 13 side can be obtained more reliably. When the angle θ is 80° or less, the effect can be obtained more reliably.
Further, when the angle θ formed by the rod-shaped body contact portion 21 and the rotation support portion 22 is 55° or more, a force that pushes back the pipe P toward the rod-shaped body receiving portion 11 can be more reliably applied. Therefore, it is preferable. When the angle θ is 60° or more, the effect can be obtained more reliably.

The rotation support portion 22 of the second metal fitting 20 is pivotally supported by the rear plate portion 13 of the first metal fitting 10 via a hinge 30.
Specifically, the second metal fitting 20, in which the rotation support portion 22 is pivotally supported by the rear plate portion 13 via a hinge 30, has the proximal end of the rod-shaped body contact portion 21 disposed closer to the rear plate portion 13. It is attached to the first metal fitting 10 in such a direction that the corner between the rod-shaped body abutting portion 21 and the rotation support portion 22 is placed closer to the rear plate portion 13 .
When the second metal fitting 20 is rotated in the direction of lowering due to its own weight and approaching the front surface of the rear plate part 13, the rod-shaped body contacting part 21 is placed at a position facing the upper surface of the rod-shaped body receiving part 11. It is set to be placed.
Further, the second metal fitting 20 rotates in a downward direction due to its own weight, and the free end 21a of the rod-shaped object contacting section 21 disposed at a position facing the upper surface of the rod-shaped object receiving section 11 moves diagonally upward from the rear plate section 13 side. It is arranged so that it is facing towards the

In addition, the second metal fitting 20 rotates in the downward direction due to its own weight, and the rod-shaped body contact portion 21 of the second metal fitting 20 and the rod-shaped body receiving portion 11 of the first metal fitting 10 are opposed to each other, as shown in FIG. In this state, the second metal fitting 20 is pivotally supported by the first metal fitting 10 so that a space in which the pipe P is accommodated is formed between the rod-shaped object contacting part 21 and the rod-shaped object receiving part 11.
Here, one end of the hinge 30 is fixed to the upper end of the second metal fitting 20 (rotation support part 22), and the other end of the hinge 30 is fixed to the upper end of the first metal fitting 10 (rear plate part 13). The second metal fitting 20 and the first metal fitting 10 are rotatably connected.
In particular, when the second metal fitting 20 is rotated in a downward direction due to its own weight and the rod-shaped body abutting portion 21 is disposed at a position facing the upper surface of the rod-shaped body receiving portion 11, the rod-shaped body of the second metal fitting 20 is In a state where the pipe P is accommodated between the abutting part 21 and the rod-shaped body receiving part 11 of the first metal fitting 10, there is a distance of several mm (for example, 1 to 3 mm) between the rod-shaped body abutting part 21 and the pipe P. There is a slight gap between the two. If there is a slight gap between the rod-shaped body abutting portion 21 of the second metal fitting 20 and the pipe P, the second metal fitting 20 can be rotated smoothly.
In this embodiment, the distance between the rod-shaped body contact part 21 and the pipe P in the state where the pipe P is arranged between the rod-shaped body receiving part 11 and the rod-shaped body contact part 21 is the height of the front plate part 12 ( It is designed to be smaller than the dimension (dimension from the base end to the top end of the front plate part 12).
For example, if the diameter of the pipe P held by the rod-shaped object holding device 100 is 48.6 mm, the distance between the rod-shaped object contacting part 21 and the pipe P is 1 mm, and the height of the front plate part 12 is 10 mm. It was designed to be.

Next, a method of using the rod-shaped body holding device 100 of this embodiment, and a procedure for installing the pipe P at a predetermined location using the rod-shaped body holding device 100 will be described.
In this embodiment, a case will be described in which a pipe P is installed in a tunnel to be used as a support point to prevent a cart from moving or falling during work in a tunnel.
In addition, in the tunnel, a plurality of the above-mentioned square steel pipes 50 are provided at predetermined intervals as, for example, cable receivers on which cables are suspended.

First, the fixing part 14 of the rod-shaped body holding device 100 (first fitting 10) is inserted into the square steel pipe 50, and the rod-shaped body holding device 100 is attached to the square steel pipe 50 at a predetermined location (see FIG. 4).
Then, with the fixing part 14 inserted into the square steel pipe 50, a retaining pin (not shown) is inserted into the overlapping through hole 50a and the mounting hole 14a to fix the rod-shaped body holding device 100 to the square steel pipe 50. .

Next, as shown in FIG. 4, the second metal fitting 20 is rotated so as to separate the rod-shaped body contacting part 21 of the second metal fitting 20 from the rod-shaped body receiving part 11 of the first metal fitting 10. The pipe P is placed on the rod-shaped body receiving portion 11 of the metal fitting 10.
With the pipe P placed on the first metal fitting 10, the pipe P is in contact with the pipe P at three locations: the upper end of the front plate part 12, the upper surface of the rod-shaped body receiving part 11, and the front surface of the rear plate part 13. Specifically, the upper end of the front plate part 12, the upper surface of the rod-shaped body receiving part 11, and the front surface of the rear plate part 13 are in line contact with the side surface of the pipe P at three locations.

Next, as shown in FIG. 5, the second metal fitting 20 is rotated in a direction in which it is lowered by its own weight and in a direction in which the second metal fitting 20 approaches the front surface of the rear plate part 13, so that the upper surface of the rod-shaped body receiving part 11 is rotated. The rod-shaped body abutting portion 21 is arranged at a position facing the rod-shaped body receiving portion 11 and the rod-shaped body abutting portion 21 so that the pipe P is accommodated.
Since there is a slight gap between the pipe P placed on the rod-shaped body receiving part 11 and the rod-shaped body abutting part 21 arranged at a position facing the upper surface of the rod-shaped body receiving part 11, the second metal fitting 20 can be rotated smoothly.
Note that even if the distance between the rod-shaped body contact portion 21 and the pipe P is in sliding contact (the gap is 0 mm), the second metal fitting 20 can be rotated.

In this way, after placing the pipe P on the rod-shaped object receiving part 11 of the first metal fitting 10, by arranging the rod-shaped object contacting part 21 of the second fitting 20 at a position facing the upper surface of the rod-shaped object receiving part 11, The pipe P is held between the first metal fitting 10 and the second metal fitting 20 by fitting the pipe P between the rod-shaped body receiving part 11 of the first metal fitting 10 and the rod-shaped body contacting part 21 of the second metal fitting 20. I can do it.
At this time, the corner between the rod-shaped body contact part 21 and the rotation support part 22 is lower than the circular apex part of the side surface of the pipe P placed on the rod-shaped body receiving part 11 (the highest part of the side surface of the pipe P). It is also located at a lower position, closer to the rear plate portion 13 than its circular apex portion (see FIG. 5).
Then, all the rod-shaped body holding devices 100 fixed to the rectangular steel pipes 50 at multiple locations in the tunnel are held in the same manner, and as shown in FIG. The pipe P can be installed in the square steel pipe 50 of the square steel pipe 50 via the rod-shaped body holding device 100.
In this way, the pipe P can be installed at a predetermined location by holding the pipe P with the first metal fitting 10 and the second metal fitting 20 of the rod-shaped body holding device 100 that are fixed to the square steel pipe 50 that is a predetermined location. I can do it.

In particular, in this rod-shaped object holding device 100, when the pipe P placed and held between the rod-shaped object receiving part 11 and the rod-shaped object contact part 21 abuts the rod-shaped object part 21 so as to push it up. In addition, as a reaction occurs in the direction of bringing the second metal fitting 20 closer to the rear plate portion 13 side, the pipe P is pushed back toward the rod-shaped body receiving portion 11 side, and the first metal fitting 10 and the second metal fitting The pipe P is prevented from falling out from between the holes 20.
This is because the pipe P placed on the first metal fitting 10 is in contact with three places: the upper end of the front plate part 12, the upper surface of the rod-shaped body receiving part 11, and the front surface of the rear plate part 13, and the second This is due to the fact that the rod-shaped body abutting portion 21 and the rotation support portion 22 of the metal fitting 20 form an acute angle and are pivotally supported with the corner toward the rear plate portion 13, and the pipe P is rod-shaped. This is because when the body abutting portion 21 is abutted to push it up, the second metal fitting 20 rotates in a direction closer to the rear plate portion 13 due to the reaction.
Specifically, even if the pipe P placed on the first metal fitting 10 tries to climb over the front plate part 12 and comes into contact with the rod-shaped body contact part 21 in a manner that pushes it up, as shown in FIG. The second metal fitting 20 does not rotate clockwise but counterclockwise, and since the second metal fitting 20 that is pivotally supported by the first metal fitting 10 does not open, the second metal fitting 20 does not rotate clockwise, but rotates counterclockwise. The pipe P will not fall out from between the second metal fittings 20.
More specifically, as shown in FIG. 7, in this rod-shaped object holding device 100, the pipe P placed and held between the rod-shaped object receiving part 11 and the rod-shaped object contact part 21 is held in the rod-shaped object holding device 100. When the contact portion 21 is brought into contact so as to be pushed up, and the pipe P is brought into contact so as to push the upper end of the front plate portion 12 of the first metal fitting 10 forward, a reaction force that causes the pipe P to approach the rear plate portion 13 side As a result, the pipe P is pushed back toward the rod-shaped body receiving portion 11, so that the pipe P does not fall out from between the first metal fitting 10 and the second metal fitting 20.

On the other hand, when removing the pipe P from the rod-shaped body holding device 100 that holds the pipe P with the first metal fitting 10 and the second metal fitting 20, the user grasps the second metal fitting 20 and the second metal fitting 20 is held. By rotating the second metal fitting 20 in the opposite direction to the direction in which it lowers due to its own weight and opening it so as to separate it from the first metal fitting 10, the state shown in FIG. 4 can be achieved, so the rod-shaped object holding device 100 The pipe P can be easily removed from the pipe P.

As described above, with this rod-shaped object holding device 100, after the pipe P is placed on the first metal fitting 10, the second metal fitting 20 is rotated in the direction of lowering due to its own weight (counterclockwise in FIG. 5). If so, the pipe P can be held by the first metal fitting 10 and the second metal fitting 20, and the pipe P can be attached to the rod-shaped object holding device 100.
In addition, when removing the pipe P from the rod-shaped body holding device 100 holding the pipe P, rotate the second metal fitting 20 in the opposite direction (clockwise in FIG. 5) from the direction in which it lowers due to its own weight. By opening the second metal fitting 20 so as to separate it from the first metal fitting 10, the pipe P can be removed from the rod-shaped object holding device 100.
With such a rod-shaped body holding device 100, the pipe P can be attached and detached with a simpler operation without using tools such as a wrench or a spanner.

With the rod-shaped object holding device 100 of this embodiment, the pipe P can be attached and detached with a simpler operation, so the pipe P used as a support point can be quickly installed and removed.

In the above embodiment, the fixing part 14 for fixing the rod-shaped object holding device 100 at a predetermined location is arranged on the rear surface of the rear plate part 13 of the first metal fitting 10. The invention is not limited to this, but may be provided on the lower surface of the rod-shaped body receiving portion 11 of the first metal fitting 10 and may be provided so as to extend further rearward than the rear plate portion 13.

In addition, in the above embodiment, when the pipe P is housed between the rod-shaped body receiving part 11 and the rod-shaped body abutting part 21, there is a small amount of space between the pipe P and the rod-shaped body abutting part 21. Although it is assumed that there is a gap or that the rod-shaped body contact portion 21 and the pipe P are in sliding contact (gap 0 mm), the present invention is not limited to this. The pipe P may be gripped by the second metal fitting 20 and the first metal fitting 10 such that the portion 21 presses the pipe P toward the rod-shaped body receiving portion 11 of the first metal fitting 10.
In this case, compared to the case where the gap is 0 mm, the rod-shaped body abutting portion 21 and the pipe P are arranged at a distance where they rub more strongly.

In addition, it goes without saying that the specific detailed structure and the like can also be changed as appropriate.

10 First metal fitting 11 Rod-shaped body receiving part 12 Front plate part 13 Rear plate part 14 Fixing part 14a Mounting hole 20 Second metal fitting 21 Rod-shaped body contact part 21a Free end 22 Rotation support part 30 Hinge 50 Square steel pipe (predetermined location)
50a Through hole 100 Rod-shaped body holding device P Pipe (rod-shaped body)

Claims (6)

A rod-shaped body holder comprising a first metal fitting and a second metal fitting rotatably supported by the first metal fitting, the first metal fitting and the second metal fitting holding a rod-shaped body having a substantially circular cross-sectional view. A device,
The first metal fitting is
a rod-shaped body receiving portion on which the rod-shaped body is placed;
a front plate part erected on the front end side of the rod-shaped body receiving part;
a rear plate part that stands higher than the front plate part on the rear end side of the rod-shaped body receiving part, and has the second metal fitting pivotally supported at a position higher than the upper end of the front plate part;
It has a fixing part for fixing the rod-shaped body holding device at a predetermined location,
The second metal fitting is arranged at a position facing the upper surface of the rod-shaped body receiving part when the second metal fitting is rotated in a direction in which the second metal fitting is lowered by its own weight and in a direction approaching the front surface of the rear plate part. It has a rod-shaped body abutting part,
When the rod-shaped body is placed on the rod-shaped body receiving portion and the rod-shaped body contact portion is disposed at a position facing the top surface of the rod-shaped body receiving portion, at least the top surface of the rod-shaped body receiving portion and the front surface of the rod-shaped body receiving portion are disposed. The upper end of the plate portion and the front surface of the rear plate portion are configured to contact the side surface of the rod-shaped body,
When the rod-shaped body placed on the rod-shaped body receiving portion abuts the rod-shaped body abutting portion so as to push it up, a reaction occurs in the direction of bringing the second metal fitting closer to the rear plate side. The rod-shaped object holding device is configured such that the rod-shaped object is pushed back toward the rod-shaped object receiving portion. The distance between the rod-shaped body placed on the rod-shaped body receiving portion and the rod-shaped body abutting portion disposed at a position facing the upper surface of the rod-shaped body receiving portion is from the base end of the front plate portion. The rod-shaped object holding device according to claim 1, wherein the rod-shaped object holding device is configured to be smaller than the dimension up to the upper end. The rod-shaped body placed on the rod-shaped body receiving part contacts the rod-shaped body contacting part so as to push it up, and the rod-shaped body contacts the upper end of the front plate part of the first metal fitting so as to push it forward. In this case, the rod-shaped body is pushed back toward the rod-shaped body receiving portion by a reaction force generated in the direction of bringing the rod-shaped body closer to the rear plate side. Item 2. The rod-shaped body holding device according to item 1 or 2. The second metal fitting has a rotation support part that forms an acute angle with the rod-shaped body contact part and extends from the base end of the rod-shaped body contact part, and The rotation support portion is pivotally supported by the rear plate portion with a proximal end thereof disposed near the rear plate portion,
The free end of the rod-shaped body abutting portion, which is disposed at a position facing the upper surface of the rod-shaped body receiving portion, is configured to face obliquely upward from the rear plate side. The rod-shaped body holding device according to any one of claims 1 to 3. 5. The rod-shaped body holding device according to claim 4, wherein the angle formed by the rod-shaped body contact portion and the rotation support portion is 85° or less. The rod-shaped object holding device according to any one of claims 1 to 5, wherein the fixing part is provided on the rear surface of the rear plate part.

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