JP7833280B2 - Hole alignment jig and rod-shaped member insertion method - Google Patents

Description

This invention relates to a hole alignment jig and a method for inserting a rod-shaped member.

A bolt hole alignment device is known for aligning the bolt holes of segments assembled on the inner circumference of a tunnel (see, for example, Patent Document 1).

Furthermore, alignment tools for aligning bolt holes in pipe flanges are known (see, for example, Patent Document 2).

The bolt hole alignment device disclosed in Patent Document 1 positions the bolt holes by moving a plurality of claws inserted across the bolt holes radially outward.

Japanese Patent Application Publication No. 6-180099 Japanese Patent Publication No. 2016-068244

In the bolt hole alignment device disclosed in Patent Document 1, multiple claws can be moved radially without manual intervention by rotating a link gear with a cylinder.

However, the bolt hole alignment device disclosed in Patent Document 1 includes a cylinder and a link gear, resulting in a heavy device and a complex structure.

This invention aims to provide a hole alignment jig with a simplified structure, taking into consideration the above facts.

The hole alignment jig according to the first embodiment comprises a pair of movable members that face each other and are inserted across a plurality of holes; a pair of male screw portions that protrude from the pair of movable members toward each other; and a rotating connector that connects the pair of male screw portions, with a pair of female screw portions that are screwed into each of them and that face opposite directions.

According to the hole alignment jig of the first embodiment , a pair of movable members face each other and are inserted into multiple holes. A pair of male threaded portions protrude from the pair of movable members toward each other. These male threaded portions are screwed into a pair of female threaded portions of a rotating connector. In this way, the pair of male threaded portions are connected via the rotating connector.

Here, the pair of female threads are oriented in opposite directions. As a result, when the rotating connector is rotated in a predetermined direction relative to the pair of male threads, the distance between the pair of movable members widens, and the outer surfaces of the pair of movable members come into contact with the inner surfaces of the multiple holes. This results in the multiple holes being positioned.

On the other hand, when the rotating connector is rotated in the reverse direction, the distance between the pair of movable members narrows, creating a gap between the outer surfaces of the pair of movable members and the inner surfaces of the multiple holes. This allows the pair of movable members to be easily withdrawn from the multiple holes.

Thus, in this invention, by using an extension/retraction mechanism similar to that of a turnbuckle, a pair of movable members can be moved in opposing directions with a simple configuration. Therefore, the structure of the hole alignment jig can be simplified.

The hole alignment jig according to the second embodiment is a hole alignment jig according to the first embodiment , wherein the outer surfaces of the pair of movable members are curved surfaces that are convex outwards.

According to the hole alignment jig of the second embodiment , the outer surfaces of the pair of movable members are curved surfaces that are convex outwards. This prevents scratches or other damage to the inner surfaces of the multiple holes when the outer surfaces of the pair of movable members are brought into contact with the inner surfaces of the multiple holes.

The hole alignment jig according to the third embodiment is a hole alignment jig according to the first or second embodiment , wherein the rotating connector has a tool mounting portion to which a tool is attached.

According to the hole alignment jig of the third embodiment , the rotating connector has a tool mounting portion. By attaching a tool to this tool mounting portion, the rotating connector can be easily rotated relative to a pair of male screw portions.

A rod-shaped member insertion method according to the fourth embodiment includes: an installation step of inserting a pair of the movable members according to any one of the first to third embodiments into a plurality of holes; a hole alignment step of widening the distance between the pair of movable members by rotating the rotating connector and bringing the outer surfaces of the movable members into contact with the inner surfaces of the plurality of holes; and a removal step of narrowing the distance between the pair of movable members by rotating the rotating connector in the opposite direction, and pulling out the pair of movable members from the plurality of holes while a gap is formed between the outer surfaces of the movable members and the inner surfaces of the plurality of holes.
The method comprises an insertion step of inserting a rod-shaped member across multiple holes.

According to the rod-shaped member insertion method of the fourth embodiment , first, in the installation step, a pair of movable members according to one of the first to third embodiments are inserted into a plurality of holes. Next, in the hole alignment step, the distance between the pair of movable members is widened by rotating the rotating connector, and the outer surfaces of the movable members are brought into contact with the inner circumferential surfaces of the plurality of holes. This positions the plurality of holes.

Next, in the removal process, the rotating connector is rotated in the reverse direction to narrow the distance between the pair of movable members, creating a gap between the outer surface of the movable members and the inner circumferential surface of the multiple holes. With this gap formed, the pair of movable members are then withdrawn from the multiple holes. Next, in the insertion process, the rod-shaped members are inserted across the multiple holes.

Thus, in this invention, by pre-positioning multiple holes during the hole alignment process, rod-shaped members can be easily inserted into the multiple holes.

As described above, the present invention provides a hole alignment jig with a simplified structure.

This is a side view showing a damper in which connecting pins have been installed by a rod-shaped member insertion method according to one embodiment. This is a longitudinal cross-sectional view showing the connecting pins shown in Figure 1. This is a perspective view showing a hole alignment jig according to one embodiment. Figure 3 is a cross-sectional view showing the hole alignment jig. This is a longitudinal cross-sectional view showing the construction process of a rod-shaped member insertion method according to one embodiment. This is a longitudinal cross-sectional view showing the construction process of a rod-shaped member insertion method according to one embodiment. This is a longitudinal cross-sectional view showing the construction process of a rod-shaped member insertion method according to one embodiment. This is a cross-sectional view taken along line 8-8 in Figure 7.

The following describes a hole alignment jig and a rod-shaped member insertion method according to one embodiment, with reference to the drawings.

(Hole alignment jig)
Figure 1 shows a damper 30 in which connecting pins 40 have been installed by the rod-shaped member insertion method according to this embodiment. The damper 30 is, for example, a seismic isolation damper installed in the seismic isolation layer of a structure 10. The structure 10 comprises a pair of connecting bodies 12 that are relatively displaced in the horizontal direction.

The pair of connecting bodies 12 are, for example, made of reinforced concrete. Each of these connecting bodies 12 is provided with a bracket 20. Both ends of the damper 30 are connected to these brackets 20 via connecting pins 40.

The damper 30 is, for example, an oil damper. This damper 30 has a cylinder 32 and a rod 34 that is removably inserted into the cylinder 32. One end of the cylinder 32 is rotatably connected to one bracket 20 via a connecting pin 40. The tip of the rod 34 (hereinafter referred to as "rod tip 34T") is rotatably connected to the other bracket 20 via the connecting pin 40.

Furthermore, the connection structure between the rod tip 34T and the bracket 20 is the same as the connection structure between the cylinder 32 and the bracket 20. Therefore, the following explanation will focus on the connection structure between the rod tip 34T and the bracket 20, while the explanation of the connection structure between the cylinder 32 and the bracket 20 will be omitted.

The bracket 20 has a base plate 22 and a pair of flanges 24. The base plate 22 is fixed to the side of the connecting body 12, for example, by anchor bolts or the like. The pair of flanges 24 protrude from this base plate 22.

As shown in Figure 2, the pair of flanges 24 are formed from steel plates or the like and are arranged facing each other in the vertical direction. Each flange 24 has an insertion hole 26. The insertion hole 26 is a circular through-hole that penetrates the flange 24 in the thickness direction (vertical direction). The rod tip 34T is inserted between this pair of flanges 24.

The pair of flanges 24 are an example of the first component, and the rod tip 34T is an example of the second component.

The rod tip 34T is formed in a ring shape when viewed from above. An insertion hole 36 is also formed in the rod tip 34T. The insertion hole 36 is a circular through-hole that penetrates the rod tip 34T in the thickness direction (vertical direction). The radius of the insertion hole 36 is approximately the same as the radius of the insertion holes 26 of the pair of flanges 24. Connecting pins 40 are inserted vertically into these insertion holes 26 and 36.

The connecting pin 40 is formed in a cylindrical shape with a radius slightly smaller than that of the insertion holes 26 and 36. Retaining members 42 are attached to both ends of the connecting pin 40. The pair of flanges 24 and the rod tip 34T are rotatably connected via this connecting pin 40.

Note that insertion holes 26 and 36 are examples of holes. Also, the connecting pin 40 is an example of a rod-shaped member.

Here, as shown in Figure 2, in order to insert the connecting pin 40 into the insertion holes 26 and 36 of the pair of flanges 24 and the rod tip 34T, it is necessary to position the three insertion holes 26 and 36 of the pair of flanges 24 and the rod tip 34T.

However, visually positioning the three insertion holes 26 and 36 is time-consuming. In particular, in the damper 30, the clearance between the inner circumferential surfaces 26S and 36S of each insertion hole 26 and 36 and the outer circumferential surface 40A of the connecting pin 40 is small, making it difficult to position the three insertion holes 26 and 36.

(Hole alignment jig)
Therefore, in this embodiment, the three insertion holes 26 and 36 are positioned using a hole alignment jig 50 (see Figure 3), and then the connecting pins 40 are inserted into these insertion holes 26 and 36. The configuration of the hole alignment jig 50 will be described below. As shown in Figures 3 and 4, the hole alignment jig 50 has a pair of movable members 52 and a rotating connector 60.

(Movable member)
As shown in Figures 5 and 6, the pair of movable members (blades) 52 are made of, for example, metal. These pair of movable members 52 are longitudinal members that are inserted across the three insertion holes 26 and 36. The pair of movable members 52 face each other and are arranged substantially parallel to each other.

As shown in Figure 4, the cross-sectional shape of the pair of movable members 52 is an arc shape that is convex outward. Therefore, the outer surface 52A of the pair of movable members 52 is an arc shape that is convex outward when viewed from the longitudinal direction of the movable member 52.

As shown in Figure 7, the outer surfaces 52A of the pair of movable members 52 are in contact with the inner circumferential surfaces 26S and 36S of the insertion holes 26 and 36. Furthermore, the curvature of the outer surfaces 52A of the pair of movable members 52 is greater than or equal to the curvature of the insertion holes 26 and 36. In other words, the radius of curvature of the outer surfaces of the pair of movable members 52 is less than or equal to the radius of curvature of the insertion holes 26 and 36. This prevents damage to the inner circumferential surfaces 26S and 36S when the outer surfaces 52A of the pair of movable members 52 come into contact with them.

As shown in Figure 4, the inner surfaces 52B of the pair of movable members 52 are provided with a pair of male threaded portions 54 that protrude toward each other. The pair of male threaded portions 54 are formed, for example, by stud bolts (fully threaded bolts). Male threads are formed on the outer circumferential surface of each male threaded portion 54.

One end of each pair of male threaded portions 54 is joined by welding or the like, abutting against the longitudinal center of the inner surface 52B of the movable member 52. As a result, the pair of male threaded portions 54 protrude from the longitudinal center of the inner surface 52B of the movable member 52 toward each other. These pair of male threaded portions 54 are connected by a rotating connector 60.

(Rotating connector)
As shown in Figure 3, the rotating connector 60 is formed, for example, by a long nut (high nut). This rotating connector 60 is formed in a polygonal prism shape. This allows a tool 70, such as a box wrench (see Figure 5), to be attached to the rotating connector 60 in a detachable manner. In other words, the outer circumference of the rotating connector 60 is a tool attachment portion 60A to which the tool 70 can be attached. The tool attachment portion 60A is formed along the entire length of the rotating connector 60.

As shown in Figure 4, the rotating connector 60 has a through hole 62 extending in the axial direction. A pair of female threaded portions 64 are formed in this through hole 62. The pair of female threaded portions 64 are oriented in opposite directions (reverse thread). One female threaded portion 64 is formed on one end of the through hole 62, while the other female threaded portion 64 is formed on the other end of the through hole 62.

A pair of male threaded portions 54 are screwed into a pair of female threaded portions 64 of the rotating connector 60. This connects the pair of movable members 52 via the rotating connector 60.

Furthermore, as mentioned above, the pair of female threaded portions 64 are oriented in opposite directions. This means that when the rotating connector 60 is rotated in a predetermined direction relative to the pair of male threaded portions 54, the pair of male threaded portions 54 protrude from the pair of female threaded portions 64, widening the distance between the pair of movable members 52. Conversely, when the rotating connector 60 is rotated in the opposite direction relative to the pair of male threaded portions 54 (reverse rotation), the pair of male threaded portions 54 are screwed into the pair of female threaded portions 64, narrowing the distance between the pair of movable members 52.

By rotating the rotating connector 60 relative to the pair of male screw portions 54, or rotating it in the opposite direction, the pair of movable members 52 can be moved in opposing directions. In other words, the rotating connector 60 and the pair of male screw portions 54 form an extension/retraction mechanism using screws, similar to a turnbuckle.

(Method for inserting rod-shaped members)
Next, using the connecting pin 40 as an example, we will describe an example of a method for inserting a rod-shaped member using the hole alignment jig 50.

(Pre-drilling process)
First, the pre-hole alignment process will be explained. In the pre-hole alignment process, as shown in Figure 5, the rod tip 34T is inserted between the pair of flanges 24 of the bracket 20. Then, the three insertion holes 26, 36 of the pair of flanges 24 and the rod tip 34T are visually aligned to the extent that the hole alignment jig 50 can be inserted into them.

(Hole alignment process)
Next, the hole alignment process will be described. As shown in Figure 6, in the hole alignment process, a pair of movable members 52 of the hole alignment jig 50 are inserted into the three insertion holes 26 and 36. At this time, the rotating connector 60 is positioned near the axial center of the three insertion holes 26 and 36, that is, inside the insertion hole 36 of the rod tip 34T. In this state, both ends of the pair of movable members 52 protrude outward from the insertion holes 26 of the pair of flanges 24. Also, the end (operating part) of the tool 70 protrudes from the insertion hole 26 of one of the movable members 52.

Furthermore, the distance between the pair of movable members 52 is made narrower than the diameter of the insertion holes 26 and 36 beforehand. Also, a tool 70, such as a box wrench, is pre-attached to the rotating connector 60 of the hole alignment jig 50. The tool 70 is attached to the rotating connector 60, for example, when one of the movable members 52 is removed from the rotating connector 60. A ratchet-type tool, such as a ratchet wrench, is preferable for the tool 70.

Next, with the pair of movable members 52 inserted across the three insertion holes 26 and 36, the rotating connector 60 is rotated in a predetermined direction using the tool 70 to widen the distance between the pair of movable members 52. This causes, for example, the outer surface 52A of one movable member 52 to contact the inner circumferential surface 26S of the insertion hole 26 of the pair of flanges 24, and the outer surface 52A of the other movable member 52 to contact the inner circumferential surface 36S of the insertion hole 36 of the rod tip 34T.

In this state, the tool 70 is used to further rotate the rotating connector 60 in a predetermined direction, widening the distance between the pair of movable members 52. As a result, the outer surface 52A of one movable member 52 presses against the inner circumferential surface 26S of the insertion holes 26 of the pair of flanges 24, while the outer surface 52A of the other movable member 52 presses against the inner circumferential surface 36S of the insertion hole 36 of the rod tip 34T. Consequently, the pair of flanges 24 and the rod tip 34T move relative to each other in a direction away from each other.

Then, as shown in Figures 7 and 8, the rotating connector 60 is rotated by the tool 70 until the outer surfaces 52A of the pair of movable members 52 contact all of the inner circumferential surfaces 26S, 36S of the three insertion holes 26, 36, thereby widening the distance between the pair of movable members 52. This positions the three insertion holes 26, 36 coaxially.

(Removal process)
Next, the removal process will be described. In the removal process, the rotating connector 60 is rotated in the reverse direction using the tool 70, narrowing the distance between the pair of movable members 52. This creates a gap (not shown) between the outer surface 52A of the pair of movable members 52 and the inner circumferential surfaces 26S, 36S of the three through holes 62. In this state, the pair of movable members 52 are pulled out from the three insertion holes 26, 36.

(Insertion process)
Next, the insertion process will be described. In the insertion process, the connecting pins 40 are inserted into the three positioned insertion holes 26 and 36. Then, retaining members 42 are attached to both ends of the connecting pins 40 that protrude from the insertion holes 26 and 36 of the pair of flanges 24. As a result, the pair of flanges 24 and the rod tip 34T are rotatably connected via the connecting pins 40.

(effect)
Next, the operation of this embodiment will be described.

As shown in Figures 6 and 7, according to this embodiment, the pair of movable members 52 of the hole alignment jig 50 face each other and are inserted into multiple insertion holes 26 and 36. The pair of male threaded portions 54 protrude from the pair of movable members 52 toward each other. These male threaded portions 54 are screwed into the pair of female threaded portions 64 of the rotating connector 60. In this way, the pair of male threaded portions 54 are connected via the rotating connector 60.

Here, the pair of female threaded portions 64 are oriented in opposite directions. As a result, when the rotating connector 60 is rotated in a predetermined direction relative to the pair of male threaded portions 54, the distance between the pair of movable members 52 widens, as shown in Figure 8, and the outer surfaces 52A of the pair of movable members 52 come into contact with the inner circumferential surfaces 26S and 36S of the multiple insertion holes 26 and 36, respectively. This results in the positioning of the multiple insertion holes 26 and 36.

On the other hand, when the rotating connector 60 is rotated in the reverse direction, the distance between the pair of movable members 52 narrows, and a gap is formed between the outer surface 52A of the pair of movable members 52 and the inner circumferential surfaces 26S, 36S of the multiple insertion holes 26, 36. This allows the pair of movable members 52 to be easily withdrawn from the multiple insertion holes 26, 36.

Thus, in this embodiment, by using an extension/retraction mechanism similar to that of a turnbuckle, a pair of movable members 52 can be moved in opposing directions with a simple configuration. Therefore, the structure of the hole alignment jig 50 can be simplified.

Furthermore, as shown in Figure 8, the outer surfaces 52A of the pair of movable members 52 are curved surfaces that are convex outwards. This prevents damage to the inner surfaces 26S, 36S (see Figure 7) of the insertion holes 26, 36 when the outer surfaces 52A of the pair of movable members 52 are brought into contact with these surfaces.

Furthermore, as shown in Figure 7, the rotating connector 60 has a tool attachment portion 60A. By attaching the tool 70 to this tool attachment portion 60A, the rotating connector 60 can be easily rotated relative to the pair of male screw portions 54.

Furthermore, by pre-attaching the tool 70 to the tool mounting portion 60A before inserting the pair of movable members 52 into the three insertion holes 26 and 36, the distance between the pair of movable members 52 can be easily adjusted.

Furthermore, by positioning the rotating connector 60 at the longitudinal center of the pair of movable members 52, when the outer surfaces 52A of the pair of movable members 52 are brought into contact with the inner circumferential surfaces 26S and 36S of the insertion holes 26 and 36, tilting of the pair of movable members 52 is suppressed.

(Variant)
Next, a modified example of the above embodiment will be described.

In the above embodiment, the outer surfaces 52A of the pair of movable members 52 are curved. However, the outer surfaces 52A of the pair of movable members 52 are not limited to curved surfaces; for example, they may be flat surfaces or the like.

Furthermore, in the above embodiment, the rotating connector 60 is fitted with a long nut. However, the rotating connector is not limited to a long nut; for example, it could be the buckle body of a turnbuckle.

Furthermore, in the above embodiment, a pair of movable members 52 are inserted across three insertion holes 26 and 36. However, the pair of movable members 52 can be positioned across at least two holes. In other words, the hole alignment jig 50 according to the above embodiment can be used for positioning (aligning) at least two holes.

Furthermore, in the above embodiment, the rod-shaped member is a connecting pin 40. However, the rod-shaped member is not limited to a connecting pin 40; for example, it could be the shaft of a bolt, etc.

Furthermore, the hole alignment jig 50 according to the above embodiment can be used for positioning various holes, not just those in the damper 30.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment. Various modifications may be appropriately combined and used, and it goes without saying that the invention can be implemented in various forms without departing from the spirit of the invention.

26 Insertion hole 26S Inner circumferential surface 36 Insertion hole 36S Inner circumferential surface 40 Connecting pin (rod-shaped member)
50 Hole alignment jig 52 Movable member 52A Outer surface 54 Male screw part 60 Rotating connector 60A Tool mounting part 64 Female screw part 70 Tool G Gap

Claims (4)

A pair of movable members facing each other and inserted across multiple holes with the axial direction of the multiple holes as the longitudinal direction ,
A pair of male screw portions protrude from the pair of movable members toward each other,
A rotating connector having a pair of male threaded portions that are each screwed into a pair of female threaded portions facing opposite directions, and the pair of male threaded portions being connected,
A hole alignment jig equipped with the following features. The outer surfaces of the pair of movable members are curved surfaces that are convex outwards.
Hole alignment jig according to claim 1. The rotating connector has a tool mounting portion to which a tool is attached.
Hole alignment jig according to claim 1 or claim 2. A pair of movable members that face each other and are inserted across multiple holes,
A pair of male screw portions protrude from the pair of movable members toward each other,
A rotating connector having a pair of male threaded portions that are each screwed into a pair of female threaded portions facing opposite directions, and the pair of male threaded portions being connected,
A method for inserting a rod-shaped member using a hole alignment jig equipped with,
An installation step of inserting a pair of the movable members across multiple holes,
A hole alignment step involves rotating the rotating connector to widen the distance between the pair of movable members, and bringing the outer surfaces of the movable members into contact with the inner surfaces of the multiple holes, respectively.
The removal process involves rotating the rotating connector in the reverse direction to narrow the distance between the pair of movable members, creating a gap between the outer surface of the movable members and the inner circumferential surface of the multiple holes, and then pulling out the pair of movable members from the multiple holes.
An insertion step of inserting a rod-shaped member across multiple holes,
A rod-shaped member insertion method comprising the above.