JPH0740604Y2 - Chain winding type hole matching jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a jig for aligning two pre-drilled members in a structure such as a steel tower.

[Prior Art] The work of overlapping the holes of the A member locked to one main pillar with the holes of the B member locked to another main pillar is always repeated when constructing a steel tower. A jig used in this case is shown in FIG. Locking shaft 9 screwed into bush 1a into hole of member A
The guide cylinders 10 are respectively inserted into the holes of the B member, one end of the chain 13 penetrating the guide cylinder is held by the locking shaft, and the other end is tightened by the tightening device S attached to the B member. It is a thing. However, in this invention, as this tightening device,
Use the threaded rod 12 in the pipe-shaped casing 11
The screw rod pulled out from the casing by tightening the
I try to tighten the chain connected to it. However, in the case of a large steel tower, the length of the chain becomes longer, and the threaded rod becomes considerably long accordingly, which makes it difficult to handle, and when the threaded rod to be pulled out conflicts with other existing members. was there.

[Means for Solving Problems] The chain pulled out from the guide tube can be wound around a drum, thereby eliminating the need for a long screw rod. Specifically, the worm wheel and the worm are pivotally supported on the case fixed to the B member, the worm shaft is rotated, and the chain is wound and towed by the winding drum integrated with the worm wheel.

[Examples] The drawings will be described. It is assumed that the members A and B are supported by different main columns and have a plurality of holes corresponding to each other.
Only one hole is shown in each figure. The locking shaft 1 is rotatably inserted into the hole of the member A via a bush 1a screwed with the locking shaft 1, and locks one end of the chain 2. Guide tube 3 is member B
It is inserted and fixed in the hole of and the chain 2 is passed through so that it can freely come in and out. The case 4 is fixed to the guide tube 3 and attached to the member B. The chain 2 can go in and out of the case. The drum 5 is rotatably supported in the case so that the chain 2 can be wound up.
Moreover, it is integrated with the worm wheel 6. The worm 7 is axially supported by the case by an axis 7a parallel to the drum and meshes with the worm wheel 6. A handle 8 is attached to the shaft 7a.

When the jig of the present invention is attached to the holes of the members A and B, the bush 1a is inserted into the A member and the guide tube 3 is inserted into the B member from the outside of the hole-matching facing surfaces. After the chain is passed through the guide cylinder 3 of the B member, the locking shaft 1 is screwed into the bush 1a.

When the shaft 7a is turned, the worm wheel turns, winding the chain 2 and tightening it. If you continue to turn shaft 7a,
Both holes are close and eventually overlap. At this time, both members A,
Since the multiple holes of B overlap at the same time, lock this with the insertion bolt, pull out the locking shaft, the guide tube, and the chain,
Insert other bolts later. It is desirable that the shaft 7a can be continuously turned while the chain is loose, and after being strained, the handle 8 which can be gradually tightened can be converted into a ratchet type handle.

FIG. 3 shows another embodiment showing a locking structure for the A member.
The locking shaft 16 connected to one end of the chain 2 is inserted into the hole of the A member via the bush 17. The nut 16a is screwed into the threaded end of the locking shaft 16, and the locking piece 16b pivotally attached to the shaft end is tilted down.
It is engaged with a groove provided in the nut 16a. By releasing this engagement and tightening the nut 16a, the locking shaft 16 can be easily pulled out. The bush 17 is threaded, and by adjusting the nut 17a, it can be fitted to the insertion outer surface according to the plate thickness. It is desirable to apply this adjusting mechanism to the guide tube 3 as well.

[Effect] Since the chain is tightened in a compact case, there is no difficulty in handling. Can be tightened without fear of contact with other existing members nearby.

[Brief description of drawings]

1 is a front view of the present invention, FIG. 2 is a plan view of a case, FIG. 3 is a front view showing another embodiment of a locking structure, and FIG. 4 is a conventional embodiment. 1 ... Locking shaft, 2 ... Chain, 3 ... Guide tube, 4 ...
… Case, 5 …… Drum, 7 …… Warm wheel, 7
…… Warm, 8 …… Handle.

Claims (1)

[Scope of utility model registration request] 1. A locking shaft, which is used for matching holes of both AB members having a plurality of holes correspondingly, and which is rotatably inserted into the hole of A member and locks one end of a chain, and a hole of B member. A guide tube that is inserted and fixed to penetrate the chain, a case that is fixed to the guide tube and is attached to the B member so that the chain can be inserted and removed, a drum that is axially supported in the case and that can wind the chain, and a drum. A chain winding type hole alignment jig consisting of a worm wheel integrated with the worm, a worm fixed to another shaft in the case and engaged with the worm wheel, and a handle capable of rotating the worm shaft.