JPH041182Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a concrete product lifting and inversion jig for lifting and inverting a secondary concrete product to bring it into a predetermined state at a site or the like.

[Prior Art] In the past, inventors have devised lifting and reversing jigs for various concrete products.

For example, one lifting and reversing jig can be used for concrete products of various widths.
It is known that a lifting and reversing jig has been devised which is configured so that the distance between a pair of connecting members attached to a horizontal member can be changed.

That is, a plurality of mounting holes are drilled at equal intervals on one end side of the horizontal member, a through hole communicating with the mounting holes is drilled in one of the connecting members, and the connecting member is secured at a predetermined location with a fixing pin. This is a lifting and reversing jig that is fixed to the horizontal member and adjusted.

However, with such a lifting and reversing jig, the weight of the lifting and reversing jig itself is extremely large, so it is difficult to move the connecting members that penetrate the horizontal members, and it is difficult to move the connecting members that penetrate the horizontal members. It is also a difficult task to match the attachment holes of the horizontal members and the through holes of the connecting members.

Furthermore, since these adjustment operations had to be carried out manually, there were also problems from the viewpoint of safety, considering that the device was extremely heavy.

[Purpose of the invention] Thus, the present invention was devised to address these conventional problems. A pair of attached connecting members is made movable.The pair of connecting members is attached to the horizontal member by screwing, and by rotating the horizontal member, the distance between the pair of connecting members can be changed. The object of the present invention is to provide a lifting and reversing jig for concrete products that can be automatically changed and has excellent workability and safety.

[Structure of the invention] The lifting and reversing jig for concrete products according to the invention includes a hanging rod, a pair of pipe-shaped connecting members that are connected to the hanging rod via an upper connecting overhang, and the connecting members are movable. A concrete product comprising: a horizontal member that can be screwed in and attached; a pair of lifting members that hangs down from the lower connecting overhang of the connecting member; and insertion jigs that are respectively attached to the lifting members. This is a lifting and reversing jig, wherein the horizontal member has male threaded portions with different thread directions from approximately the center toward both ends, and the connecting member has a female threaded hole into which the male threaded portion can be screwed. The distance between the pair of connecting members can be automatically adjusted by drilling and rotating the horizontal member, and locking nuts are provided on both sides of the pair of connecting members screwed into the horizontal member. It is characterized by being

[Example] The present invention will be described below based on an example shown in the drawings.

FIG. 1 is a schematic front view showing the state of use of the present invention.

The lifting and reversing jig A for concrete products according to the present invention includes a hanging rod 1, a pair of connecting members 2, 2 connected to the hanging rod 1, and a horizontal member to which the connecting members 2, 2 are movably attached. 3, a pair of lifting members 4, 4 hanging from the connecting members 2, 2,
It is configured to include insertion jigs 5, 5 attached to the lifting members 4, 4, respectively.

The suspension rod 1 has a ring-shaped locking portion 6 that locks onto a lifting device such as a crane, and chain-shaped rod members 7, 7 extending bifurcated from the locking portion 6.

The rod members 7, 7 are connected to the pair of connecting members 2, 2 via an upper connecting bulge 20 which is formed in a pair with the connecting members 2, 2 and extends from the upper part of the pair of connecting members 2, 2. There is.

Here, the connecting member 2 has a pipe shape and has a female threaded hole on the inner periphery.

The horizontal frame member 3 is formed with male screw portions 8, 8 having different screw directions from the approximate center toward both ends, and the pair of connecting members 2, 2 are screwed into the horizontal frame member 3. It is configured such that the distance between the pair of connecting members 2, 2 can be adjusted by rotating.

In other words, a pair of connecting members 2,
2 can be moved simultaneously and facing each other.

Further, a rotating handle 9 is attached to one end of the horizontal member 3, and a detachable collar 1 of the connecting member 2 is attached to the other end.
0 is installed.

Further, locking nuts 11 for preventing loosening are provided on both sides of the connecting members 2, 2 to prevent the connecting members 2, 2 from moving freely in the longitudinal direction of the horizontal member 3 during operation.

Further, a pair of lifting members 4, 4 are attached to hang down from a lower connecting projection 21 formed at the lower end of the pair of connecting members 2, 2.

The lifting members 4, 4 are made of flexible members, and in this embodiment, they are made of chains, and insertion jigs 5, 5 are attached to the lifting members 4, 4, respectively. It is being

The insertion jig 5 includes an insertion rod 12 whose protrusion length can be adjusted and a jig main body 13 that supports the insertion rod 12.

In the above, when attempting to lift a wide concrete product B as shown in Fig. 1, first lift the lifting and reversing jig A with a lifting machine, and in that state, lift the lifting and reversing jig A, and in that state Rotate 9.

Then, the pair of connecting members 2, 2 are both moved outward by the screw action.

After moving to the specified position, the horizontal member 3
Stop the rotation operation. Then, the locking nuts 11 are fastened to prevent the pair of connecting members 2, 2 from moving.

Next, as shown in FIG. 2, when lifting a narrow concrete product B, the horizontal member 3 is rotated in the opposite direction from that in FIG. 1. Then, the distance between the pair of connecting members 2, 2 becomes narrower. After narrowing to a predetermined position, the connecting members 2, 2 may be fixed with the locking nuts 11 as described above.

[Effect of the invention] Thus, the present invention has the above-mentioned configuration, and in the concrete product lifting and reversing jig according to the present invention, male threaded portions with different thread directions are formed on the left and right sides of the horizontal members, and Since the pair of connecting members are screwed into each other, the distance between the pair of connecting members can be smoothly adjusted by simply rotating the horizontal member.

Further, the pair of connecting members has upper and lower connecting protrusions 2 that are integrally formed in the vertical direction.
Since it is connected to the rod member 7 or the lifting member 4 through 0 and 21, it does not rotate together with the horizontal member during rotation, making it very easy to adjust the distance. It can quickly handle lifting work of concrete products, and its workability is extremely good.

In addition, after adjusting the width, the connecting members are fastened and fixed with the locking nuts 11, so the connecting members do not move in the longitudinal direction of the horizontal members during the lifting and reversing work, and therefore, the lifting and reversing work is completed. Work safety can be greatly improved.

[Brief explanation of the drawing]

1 and 2 are schematic front views showing the state of use of the present invention. A... Lifting and reversing jig, B... Concrete product, 1... Hanging rod, 2... Connecting member, 3 Horizontal member,
4... Lifting member, 5... Insertion jig, 6... Locking part, 7... Rod material, 8... Male thread part, 9... Handle, 10... Separation flange, 11... Locking nut , 12... Insert rod, 13... Jig body, 20
...Upper connecting overhang, 21...Lower connecting overhang.

Claims (1)

[Scope of Claim for Utility Model Registration] A hanging rod, a pair of pipe-shaped connecting members connected to the hanging rod via an upper connecting protrusion, and a horizontal member to which the connecting members are movably screwed together. A concrete product lifting and reversing jig comprising a frame material, a pair of lifting members hanging from the lower connecting overhang of the connecting member, and an insertion jig attached to each of the lifting members, and the above-mentioned. The horizontal members are each formed with male threaded portions having different thread directions from approximately the center toward both ends, and the connecting member is provided with a female threaded hole into which the male threaded portions can be screwed. The distance between the pair of connecting members can be automatically adjusted by rotating the concrete member, and locking nuts are provided on both sides of the pair of connecting members screwed into the horizontal member. Product lifting and reversing jig.