JPH11320439A - Bolt holding jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely operate a bolt holding jig by being provided with an abutment part being in contact with a building structure, a bolt holding part movably holding a bolt, a spring member energizing the bolt holding part by a spring, and a tension operation part for uncoupling the bolt holding part from the bolt. SOLUTION: A bolt 3 for fixing a roofing material 2 is held by a bolt holding jig 14. The bolt holding jig 1 is integrally constituted of an abutment part 4 being in contact with the roofing material 2, a bolt holding part 5 which holds the bolt movably in the vertical direction and opens/closes in horizontal direction, a spring member 7 which energizes the bolt holding part 5 in the closing direction by a spring, and a tension operation part 6 which drives the bolt 3 held by the bolt holding part 5 into the roofing material 2 to its midway, then draws out the abutment part 4 in the direction for approximately crossing at right angles with the driving direction of the bolt 3, and uncouples the bolt holding part 5 from the bolt 3. This constitution can eliminate any necessity of pushing the abutment part 4 by hands so as to easily drive the bolt 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a jig for holding a bolt, and more particularly, to a jig for holding a bolt for fixing a building structure.

[0002]

2. Description of the Related Art Conventionally, when a roofing material is laid, bolts 3 are driven into connecting portions of adjacent roofing materials 2 and 2 so as to be fixed to a roof foundation 16 as shown in FIG. ing.

As another conventional example, as shown in FIG. 9, a packing material 21 closes a space between a connecting piece 17 of one adjacent roof material 2 and a connected piece 18 of the other roof material 2. At the same time, bolts 3
And then, from the upper surface of the connection piece 17,
A cap 19 having a substantially inverted U-shaped cross section is placed over the upper surface of the cap 19, and both ends of the cap 19 are locked to fixing brackets 20, thereby hiding the bolts 3 and ensuring waterproofness. Have been.

[0004]

However, FIGS. 8 and 9
In the conventional example shown in FIG.
Since the bolt 3 is set up vertically with one hand and an electric screwdriver or the like is held in the other hand, the hand holding the bolt 3 moves, and it is difficult for the driving angle to be fixed. And it becomes difficult to drive the bolt 3 at an accurate angle. Therefore, the imaginary line a in FIG.
Alternatively, there is a possibility that the bolt 3 may be inclined in the direction indicated by B or the direction indicated by C in FIG. 10 to remove the roof foundation 16, so that the fixing work of the roof material 2 requires skill. Moreover, when the bolts 3 are hammered off after removing the roof base 16, it is necessary to pull out the bolts 3 and re-insert them, so that it takes a lot of labor and time for the installation work. There is also a problem that if the driving work is repeated many times as described above, the surface of the roofing material 2 is damaged, the appearance is impaired, and rain leaks.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and it is an object of the present invention to stably hold a bolt at the time of inserting a bolt, so that even an unskilled person can accurately hold a bolt without tilting it. It can be easily driven at an angle, can prevent damage to the building structure due to damage, and can easily remove the bolt holding part from the bolt after driving the bolt halfway into the building structure. Another object of the present invention is to provide a bolt-holding jig that is light and easy to use, and that is capable of improving bolt holding force and facilitating detachment of the bolt. Another object of the present invention is to provide a jig for holding a bolt, which is capable of reducing the size.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a jig for holding a bolt 3 driven into a building structure. An abutting portion 4 to be brought into contact, a bolt holding portion 5 that can be freely opened and closed to hold the bolt 3 movably in the driving direction A, and a spring member 7 that biases the bolt holding portion 5 in a closing direction.
And a pull operation section 6 for pulling the contact section 4 in a direction G substantially perpendicular to the driving direction A of the bolt 3 to detach the bolt holding section 5 from the bolt 3. With this configuration, since the bolt 3 is held by the bolt holding portion 5 at the time of starting the driving, it is not necessary to hold the bolt 3 by hand as in the conventional case, and even an amateur can work safely. Since the bolt 3 can be driven at an accurate angle without tilting, and the openable and closable bolt holding portion 5 is spring-biased in the closing direction by the spring force of the spring member 7, the bolt 3 is securely held. At the stage when the bolt 3 is partially driven into the building structure, the pulling operation part 6 is pulled by hand and the contact part 4 is moved in the direction B substantially perpendicular to the direction A in which the bolt 3 is driven. By bolt 3 More bolt holding portion 5 is opened, the bolt 3 becomes easily disengaged so. Further, since the abutting portion 4, the bolt holding portion 5, the spring member 7, and the tension operating portion 6 are provided, the entire bolt holding jig 1 is light and easy to use.

The bolt holding portion 5 includes a bolt receiving portion 9 fixed to the contact portion 4, and a rotatable bolt retainer resiliently pressed toward the bolt receiving portion 9 by the spring member 7. A side opening 8 is provided between the bolt receiving portion 9 and the bolt holding portion 10 and opened in the direction in which the bolt 3 is released. The side opening 8 is formed by the bolt holding portion 10. In the closed state, the opening width D
Is preferably smaller than the outer diameter dimension d of the bolt 3. In this case, the bolt holding portion 10
When the bolt 3 is closed, the bolt 3 does not come off from the side opening 8. On the other hand, when the pulling operation part 6 is pulled to remove the bolt holding part 5 from the bolt 3,
A slight opening of the bolt holding portion 10 widens the side opening 8 so that the bolt 3 can be smoothly removed.

The contact portion 4 includes a bolt holding portion 5
A bolt insertion recess 11 is provided, which communicates with the bolt insertion hole 24 and opens in the direction in which the bolt 3 is removed, and is substantially U-shaped in a plan view. When the bolt holding portion 20 is closed, the bolt is inserted. It is preferable that the opening direction E of the side surface of the recess 11 and the opening direction C of the side surface opening portion 8 of the bolt insertion hole 24 face different directions. In this case, the bolt holding portion 10 is closed. In the state, the holding force of the bolt 3 is increased, so that the bolt 3 can be effectively prevented from tilting sideways when the bolt 3 is driven.

[0009]

Embodiments of the present invention will be described below.

The bolt holding jig 1 of the present embodiment is shown in FIG.
As shown in FIG. 3, the roof material 2 filled with a heat insulating material such as a rigid polyurethane foam is fixed between the front metal plate 12 and the rear metal plate 13. Roofing material 2
At a plurality of locations in the width direction, a mountain portion 14 is provided across the entire length in the eaves ridge direction (perpendicular to the plane of the drawing), and bolts 3 are driven into the roof foundation 16 from the mountain portion 14. By doing so, the roofing material 2 is fixed to the roof foundation 16. A flat valley 15 is formed between the peaks 14. The driving portion of the bolt 3 is not limited to the upper surface of the mountain portion 14, but may be, for example, a connection end portion of the roofing material 2 shown in FIG.

A bolt 3 for fixing the roofing material 2 is held by a bolt holding jig 14 at the start of driving. As shown in FIGS. 1 to 6, the bolt holding jig 1
A contact portion 4 for contacting the surface of the roofing material 2; a bolt holding portion 5 for holding the bolt 3 movably in the vertical direction (the driving direction A) and opening and closing in the horizontal direction B; A spring member 7 for biasing the portion 5 in the closing direction and the bolt 3 held by the bolt holding portion 5 are driven halfway into the roofing material 2, and then the contact portion 4 is moved in the direction A in which the bolt 3 is driven. And a pulling operation unit 6 for pulling the bolt holding unit 5 off the bolt 3 by pulling in a direction G substantially perpendicular to. Although the material of each of the members 4, 5, and 7 is not particularly limited, a metal material is preferable in terms of increasing the strength of the jig 1 for holding a bolt.

Here, the contact portion 4 includes a top portion 14a mounted on the upper surface of the mountain portion 14 of the roofing material 2, and inclined portions 14b, 14b mounted along both side slopes of the mountain portion 14. And a substantially inverted U-shaped metal plate made of Note that the shape of the contact portion 4 may be, for example, a flat plate shape or another shape. An opening may be provided in a part of the contact portion 4 to reduce the weight. Further, the surface of the contact portion 4 may be plated with chrome or the like.

A bolt holding portion 5 is integrally provided on the upper surface of the contact portion 4. In the present embodiment, the bolt holding unit 5
A bolt receiving portion 9 fixed to the upper surface of the contact portion 4, and is rotatable in a direction of coming into contact with and separating from the bolt receiving portion 9, and is elastically pressed toward the bolt receiving portion 9 by the spring member 7. A one-sided structure in which a rear end portion of the bolt holding portion 10 is rotatably connected to a rear end portion of the bolt receiving portion 9 and only the bolt holding portion 10 opens and closes in the horizontal direction. have.

A bolt insertion hole 24 having a side opening 8 is provided between the bolt receiving portion 9 and the bolt holding portion 10. The side opening 8 is provided when the bolt holding portion 10 is closed. The opening width D is configured to be smaller than the outer diameter dimension d of the bolt 3. In the embodiment shown in FIG. 1, a semicircular recess 2 in a plan view penetrating in the vertical direction is
2 and 23 are formed respectively, and the bolt holding portion 1
0, the recesses 22 and 23 abut each other, and the bolt insertion hole 2 penetrates up and down and has a circular shape in plan view.
4 are formed. The inner diameter of the bolt insertion hole 24 is configured to be slightly larger than the outer diameter of the shaft portion 3b of the bolt 3, and in addition to the function of holding the bolt 3 at an accurate driving angle, the bolt 3 is moved to an accurate angle. It also has a function to guide freely. In addition, the bolt holding part 5 is not limited to the one-sided structure, and may be a double-sided structure in which the bolt receiving part 9 and the bolt holding part 10 are rotatable in the horizontal direction.

The bolt holding portion 10 is always urged by the spring member 7 in the closing direction. As shown in FIG. 6, a horizontal hole 25 is formed so as to pass through the bolt holding portion 10 horizontally, and a base end of a spring support shaft 26 loosely inserted into the horizontal hole 25 is connected to a bolt receiving portion. 9, a spring support shaft 26 has a tip end projecting outward from the rotatable bolt holding portion 5, and a spring member 7 made of a compression coil spring or the like is mounted on the projecting portion. The spring member 7 is resiliently pressed against the outer surface of the bolt holding portion 10 by the spring support shaft 26, whereby a spring force is constantly applied to the bolt holding portion 10 in the closing direction. The spring force of the spring member 7 can be held so that the bolt holding portion 10 is not opened when the bolt 3 is held, and when the contact portion 4 is pulled backward by the pulling operation portion 6 described later, 3, the spring is configured to have such a spring force that the bolt holding portion 10 can be forcibly opened.

A substantially U-shaped bolt insertion recess 1 is formed at the tip end of the contact portion 4 and communicates with the bolt insertion hole 24 of the bolt holding portion 5 and opens along the direction in which the bolt 3 is removed.
1, and the side opening 8 of the bolt insertion hole 24 opens in a direction different from the opening direction E of the side surface of the bolt insertion recess 11 when the bolt holding portion 10 is closed. That is, as shown in FIG. 5, when the bolt holding portion 10 is closed, the inner wall surface 10 a of the bolt holding portion 10 enters inside the inner wall surface 11 a of the bolt insertion recess 11, and the side surface of the bolt holding portion 5 The opening direction E (FIG. 1) of the opening 8 and the opening direction C (FIG. 1) of the side opening 8 of the bolt insertion hole 24 are in different directions, thereby increasing the holding force of the bolt 3. The bolt 3 can be effectively prevented from tilting sideways.

Further, on the upper surface of the contact portion 4, a pull operation portion 6 is provided.
Is protruding. The pulling operation unit 6 includes the bolt holding unit 5
After the bolt 3 held in the step 3 is driven halfway into the roofing material 2, the contact portion 4 is pulled in a direction G substantially perpendicular to the driving direction A of the bolt 3 to detach the bolt holding portion 5 from the bolt 3. In the present embodiment, the pulling operation portion is formed in a rod shape that can be gripped by hand, and is integrally fixed to the upper surface of the contact portion 4. Note that the shape of the pulling operation portion 6 is not limited to a rod shape, and it is essential that the touching portion 4 can be pulled in a direction G substantially perpendicular to the driving direction A of the bolt 3. The position is not particularly limited.

Next, the roofing material 2 is bolted 3 to the roof foundation 16.
An example of the case where the bolt 3 is fixed will be described. First, as shown in FIG. 1, the contact portion 4 of the bolt holding jig 1 is placed on the upper surface of the mountain portion 14 into which the bolt 3 is to be driven. At this time, since the contact portion 4 has a substantially U-shaped cross section that can be stably mounted so as to straddle the mountain portion 14 of the roof material 2, the contact portion 4 is easily positioned with respect to the roof material 2. it can. When the shaft portion 3b of the bolt 3 is inserted into the bolt insertion hole 24 from above the bolt holding portion 5, the bolt 3 is moved from the bolt insertion hole 24 into the contact portion 4
Slides down the bolt insertion recess 11 and the tip is
4, the head 3 a of the bolt 3 stops in a state where the head 3 a projects above the upper surface of the bolt holding portion 5 (the state of FIG. 2).

In this state, the bolt 3 is driven vertically by using an electric screwdriver or the like, so that the driving angle of the bolt 3 is fixed, and the bolt 3 is held at the bolt holder 5 at an accurate angle. It is being injected. At this time, since the bolt insertion hole 24 and the bolt insertion recess 11 are slightly larger than the outer diameter of the bolt 3, the bolt 3 moves without being caught in the bolt insertion hole 24 and the bolt insertion recess 11. As a result, the abutment portion 4 is positioned by the crest portion 14 of the roofing material 2, so that it is not necessary to press the abutment portion 4 by hand, and therefore, the bolt 3 is driven. Easy entry work.

Then, as shown in FIG.
When the bolt 3 is driven to the extent that it can be caught on the roof foundation 16, the bolting operation is temporarily stopped, and the pulling operation unit 6 is grasped by hand and pulled in the direction of the arrow G in FIGS. Is pulled rearward, and the reaction force causes the bolt 3 to push open the bolt holding portion 10 and separate from the bolt holding portion 5 and the contact portion 4. At this time, the height dimension h of the bolt holding portion 5 and the dimension H of the bolt 3 are set at the stage where the tip 3c of the bolt 3 is driven to the extent that the tip 3c of the bolt 3 is hooked on the roof foundation 16, as shown in FIG. It is desirable that the dimensional relationship is set so that the portion 3a does not contact the upper surface 5a of the bolt holding portion 5. With this setting, even if the heat insulating layer of the roofing material 2 is a soft material such as soft urethane foam,
When the pulling operation unit 6 is pulled to remove the bolt holding unit 5 from the bolt 3, the bolt 3 can be reliably prevented from tilting. At this time, since the head 3a of the bolt 3 does not contact the upper surface 5a of the bolt holding portion 5, the bolt holding portion 3 can be smoothly removed without any resistance.

After the bolt holding portion 5 is detached from the bolt 3, the bolt 3 is driven in the direction of the arrow in FIG. 7 until the head 3a of the bolt 3 comes into contact with the upper surface of the ridge 14 of the roofing material 2. . At this time, since the tip 3c of the bolt 3 has already been driven into the roof foundation 16, the bolt 3 can be easily driven in an accurate direction without tilting without the bolt holding jig 1.

The relationship between the height h of the bolt holding portion 5 and the dimension H of the bolt 3 is not limited to the embodiment shown in FIG. 3, for example, when the heat insulating layer of the roofing material 2 is made of hard urethane foam. When the hard material is used, the bolt 3 may be removed at a stage where the head 3a of the bolt 3 is not driven into the roof foundation 16, and even in this case, the inclination of the bolt 3 is controlled by the roof material 2 itself. It can be prevented. Further, in order to smoothly remove the bolt holding portion 3 and to reliably drive the tip 3c of the bolt 3 into the roof foundation 16, the height dimension h of the bolt holding portion 5 is desirably about 50 to 60 cm, for example. When the tip 3c of the bolt 3 is driven to the extent that the bolt 3 is hooked on the roof foundation 16, a gap of about several cm is formed between the head 3a of the bolt 3 and the upper surface 5a of the bolt holding portion 5. Is desirable, but is of course not limited to this value.

However, by holding the bolt 3 by using the bolt holding jig 1 of the present invention at the start of driving as described above, it is not necessary to hold the bolt 3 by hand as in the prior art, and even an amateur can use it. It is possible to work safely, and even if the surface of the roofing material 2 is made of the metal plate 12 and the tip of the bolt 3 is slippery on the surface of the metal plate 12, the bolt 3 can be accurately adjusted without tilting. You will be able to drive at an angle. As a result, skill is not required for the fixing work of the roofing material 2 and the hitting such as slanting is eliminated, so that the work efficiency is dramatically improved, and the roofing material 2 is prevented from being damaged by re-strike of the bolt 3. As a result, the appearance can be kept good, and there is no fear of leakage. In addition, since the contact part 4, the bolt holding part 5, the spring member 7, and the tension operating part 6 are integrated, the entire bolt holding jig 1 is light and can be used in a high place such as a roof. Can be easily carried, and the usability is improved. In particular, since the contact portion 4 can be easily moved by sliding on the mountain portion 14, the bolt 3 can be driven into the mountain portion 1 of the roof material 2.
4 can be sequentially and smoothly performed at a plurality of locations.

Further, the bolt holding portion 5 includes a bolt receiving portion 9 fixed to the contact portion 4, and a rotatable bolt holding portion which is resiliently pressed toward the bolt receiving portion 9 by the spring member 7. 10, the bolt 3 can be stably held between the bolt receiving portion 9 and the bolt holding portion 10 by the spring member 7, so that the bolt 3 does not rattle when the bolt is driven. Since the opening width D of the side opening 8 between the bolt receiving portion 9 and the bolt holding portion 10 is smaller than the outer diameter d of the bolt 3 when the bolt holding portion 10 is closed, There is no fear that the bolt 3 will come out of the side opening 8 when the bolt is driven in. Further, when the bolt holding section 10 is closed, the opening direction E of the side of the bolt insertion recess 11 provided in the contact section 4 is provided.
And the opening direction C of the side opening 8 of the bolt insertion hole 24 is opened in a different direction. Therefore, when the bolt holding portion 10 is closed, the holding force of the bolt 3 is increased and the bolt 3 is driven. Sometimes, the bolt 3 can be effectively prevented from tilting to the side. On the other hand, when the bolt holding portion 5 is detached from the bolt 3, the side opening 8 is greatly opened at a small opening angle of the bolt holding portion 10, so that the bolt 3 can be detached smoothly. Can also be done easily.

In the above-described embodiment, the contact portion 4 is formed of a single plate member having a substantially U-shaped cross section and placed on the peak portion 14 of the roofing material 2. May vary depending on the roofing material 2, and in consideration of this, it is desirable that the contact portion 4 has an elastic structure. For example, the contact portion 4 is formed of two divided plate members, and the two plate members are movably connected in the horizontal direction so that the contact portion 4 is expanded and contracted in accordance with the width dimension of the crest portion 14. This allows any type of roofing material 2 to be accommodated.

Although the roofing material 2 in which a plurality of peaks 14 are provided on the surface is exemplified as the roofing material 2, the type of the roofing material 2 is not limited to this, and the surface is flat. It can be applied to a simple roofing material 2. In this case, it is possible to cope with this by forming the contact portion 4 in a flat plate shape.

The bolt holding jig 1 of the present invention comprises a roofing material 2
It can be widely applied to other building structures such as wall panels. That is, when the contact portion 4 is made to follow the vertical wall surface,
The bolt holding portion 10 of the bolt holding portion 5 can be freely opened and closed in the vertical direction, so that the bolt 3 can be held in the horizontal direction, and can be adapted to fix the wall panel. Of course, the present invention is not limited to holding the bolt 3 but can be widely applied to various fixing tools such as nails and screws.

[0028]

As described above, the first aspect of the present invention is a bolt holding jig for holding a bolt driven into a building structure, wherein the jig is provided on a surface of the building structure. An abutting portion to be abutted, an openable and closable bolt holding portion for movably holding the bolt along the driving direction, a spring member for biasing the bolt holding portion in a closing direction, and a bolt for the abutting portion. And a pulling operation section for pulling the bolt holding section away from the bolt by pulling in a direction substantially perpendicular to the driving direction of the bolt. It is no longer necessary to hold bolts by hand, so that amateurs can work safely, can be driven at an accurate angle without tilting the bolt, and the bolt holding part that can be opened and closed is the spring of the spring member Close by force Because it is spring biased toward a result the bolt can surely hold the skilled in the fixing work by the bolts is not necessary, and since strike such oblique beating Sonji is eliminated, the working efficiency as well as dramatically improved,
It is possible to prevent the surface of the building structure from being damaged due to re-strike of bolts or the like. Also, at the stage where the bolt is driven halfway into the building structure, the pulling operation part is pulled by hand and the contact part is moved in a direction substantially perpendicular to the bolt driving direction. Is opened and the bolt can be easily removed. Furthermore, since it has a contact portion, a bolt holding portion, a spring member, and a tension operating portion, the jig for holding the bolt is light and can be easily carried at a high place such as a roof. Will be better.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the bolt holding portion is resiliently directed toward the bolt receiving portion by a bolt receiving portion fixed to the contact portion and a spring member. It is composed of a rotatable bolt holding portion that is pressed in a fixed manner, and between the bolt receiving portion and the bolt holding portion, there is provided a side opening opening in the direction in which the bolt is released, and this side opening is When the bolt holding section is closed, the opening width is configured to be smaller than the outer diameter of the bolt, so that the bolt does not come off from the side opening when the bolt holding section is closed. On the other hand, when pulling the pulling operation part to remove the bolt holding part from the bolt, just open the bolt holding part a little so that the side opening is large and the bolt can be removed smoothly. Runode, the withdrawal operation of the bolt can be easily performed.

According to a third aspect of the present invention, in addition to the effect of the second aspect, in the plan view, the contact portion communicates with the bolt insertion hole of the bolt holding portion and opens along the direction in which the bolt is released. A substantially U-shaped bolt insertion recess is provided, and when the bolt holding portion is closed, the opening direction of the side surface opening of the bolt insertion recess and the opening direction of the side opening portion of the bolt insertion hole are different. Since it is configured to face the bolt, the holding force of the bolt can be increased when the bolt holding portion is closed, and the bolt can be effectively prevented from tilting sideways when the bolt is driven.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a jig for holding a bolt according to an embodiment of the present invention.

FIG. 2 is a front sectional view for explaining a case where a bolt is driven in using the bolt holding jig according to the first embodiment.

FIG. 3 is a front sectional view showing a state in which the bolt is partially driven in;

FIG. 4 is a side view showing a state in which the bolt is partially inserted.

FIG. 5 is a plan view of the bolt holding jig according to the first embodiment.

FIG. 6 is a plan view illustrating a case where the bolt holding section is detached from the bolt.

FIG. 7 is an explanatory view showing a state in which the bolt holding jig is removed.

FIG. 8 is a perspective view of a conventional example.

FIG. 9 is a sectional view of another conventional example.

FIG. 10 is a cross-sectional view illustrating a conventional bolt being damaged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bolt holding jig 3 Bolt 4 Contact part 5 Bolt holding part 6 Pulling operation part 8 Side opening 9 Bolt receiving part 10 Bolt holding part 11 Bolt insertion recess A Bolt driving direction C Opening direction of side opening D Opening width of side opening d Outside diameter of bolt E Opening direction of bolt insertion recess

Claims (3)

[Claims] 1. A bolt holding jig for holding a bolt driven into a building structure, wherein the abutting portion contacts a surface of the building structure, and the bolt is moved along the driving direction. An openable and closable bolt holding portion, a spring member for biasing the bolt holding portion in a closing direction, and a contact portion pulled from the bolt by pulling the contact portion in a direction substantially perpendicular to the bolt driving direction. A jig for holding a bolt, comprising: a pulling operation section for detaching the bolt. 2. A bolt holding portion comprising: a bolt receiving portion fixed to a contact portion; and a rotatable bolt pressing portion elastically pressed toward the bolt receiving portion by a spring member. Between the receiving portion and the bolt holding portion, there is provided a side opening that opens in the bolt releasing direction, and when the bolt holding portion is closed, the opening width is equal to the outer diameter of the bolt. The jig for holding a bolt according to claim 1, wherein the jig is configured to be smaller than a dimension. 3. An abutment portion having a substantially U-shaped bolt insertion recess communicating with the bolt insertion hole of the bolt holding portion and opening along the direction in which the bolt is detached, is provided in the contact portion. 3. The configuration according to claim 2, wherein the opening direction of the side surface of the bolt insertion recess and the opening direction of the side surface opening of the bolt insertion hole are oriented in different directions when the portion is closed. Bolt holding jig.