JPH0124068Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a concrete U-shaped groove lifting and reversing jig for lifting the concrete U-shaped groove and turning it face up.

[Prior Art] The inventor has previously devised various lifting and reversing jigs.

However, all of the reversing jigs simply involve inserting an insertion rod into an insertion hole from the outer surface of the side wall of a concrete U-shaped groove and lifting it up.

By the way, when constructing a concrete U-shaped groove on-site, as shown in FIG. 1, first, the posts 1 and 1 are installed at the construction site, and then the floor is excavated and the floor leveled.

Next, water threads 2, 2 having a predetermined height and width are stretched, and U-shaped grooves A are laid at predetermined positions in line with the water threads 2, 2.

Therefore, using a conventional lifting and reversing jig,
First, insert the insertion rods 4, 4 from the outside of the side walls 3, 3 and lift up the U-shaped groove A, which is placed in an inverted U shape, that is, lying on the back side, so that it becomes a U-shape facing up. If the U-shaped groove A is lowered to the construction position after being turned 180 degrees, the problem is that the water threads 2, 2 will get in the way and must be removed each time. .

[Purpose of the invention] Thus, the present invention has been devised to address the above-mentioned conventional drawbacks, and further improves the conventional reversing jig to rotate the insertion jig, which is a component of the reversing jig. First, the U-shaped groove A, which is placed in an inverted U-shape, that is, lying on the back side, is inserted into the concrete U-shaped groove not only from the outer side of the side wall but also from the inner side. Insert the insertion rods 4, 4 from the outside of 3, lift it up, turn it 180 degrees so that it is in a U-shape facing up, and then repeat the same inversion treatment even if the water strings 2, 2 are stretched. About the tool: Insert the insertion rod from the inside of the side wall of the concrete U-shaped groove toward the outside, and in that state, lift and suspend operations can be performed, thereby speeding up the work of reversing the U-shaped groove and its laying work. The object of the present invention is to provide a lifting and reversing jig for a concrete U-shaped groove.

[Structure of the invention] The lifting and reversing jig for a concrete U-shaped groove according to the invention includes: a hanging member; a pair of connecting members connected to the hanging member; and the connecting members are attached so as to be movable in the longitudinal direction. A horizontal frame member, a pair of lifting members hanging from the connecting member, and insertion rods attached to each of the lifting members and inserted into insertion holes drilled in the concrete U-shaped groove to be lifted. It consists of a pair of insertion jigs, a shaft part and flanges provided at both ends of the shaft part, and each connection member and the end of each lifting member, or each insertion jig and the end of each lifting member. A lifting and reversing jig for a concrete U-shaped groove, which has: a rotating joint for connecting two parts; It is characterized in that it is attached so as to rotate around the flange of the rotary joint so as to form a pair, and that the insertion rod can be inserted from both the outer side and the inner side of the side wall of the concrete U-shaped groove.

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

FIG. 4 shows a first embodiment of the lifting and reversing jig of the present invention, and in the figure, reference numeral 5 indicates a hanging member.

The hanging member 5 includes a ring-shaped locking portion 6 that locks onto a lifting machine such as a crane, and chain-shaped hanging members 7, 7 extending bifurcated from the locking portion 6. ing.

Reference numeral 8 indicates a connecting member. A through hole 9 is bored in one of the connecting members 8, and a plurality of attachment holes 11 are bored in one end of the horizontal member 10 at predetermined intervals.
It communicates with... and is structured so that it can be slidably fixed with a locking pin. Further, the other connecting member 8 is formed with a female threaded portion, and is slidable by being screwed into a male threaded portion 12 formed on the other end side of the horizontal member 11.

Incidentally, chain-shaped lifting members 13, 13 are connected to the pair of connecting members 8, 8 in a hanging manner. Further, insertion jigs 16, 16 each having insertion rods 4, 4 inserted into insertion holes 14, 14 such as the U-shaped groove A to be lifted are connected to the lifting members 13, 13. .

By the way, as shown in FIGS. 4 and 6, the insertion jig 16 is inserted into the lifting member 13 so that it can be inserted from both the inner and outer sides of the side wall of the U-shaped groove.
It is configured to be rotatable around the longitudinal direction of the central axis.

As shown in FIG.
are connected via.

The rotary joint 20 is composed of a shaft portion 21 and flanges 22, 22 provided at both ends of the shaft portion 21.

A recess 18 is formed at the joint between the upper end of the jig main body 17 and the lower end of the lifting member 13.
8 includes the flange 22 and shaft portion 2 of the rotary joint 20.
A part of 1 is rotated and attached to form a pair.

FIG. 5 shows a second embodiment of the lifting and reversing jig of the present invention.

This embodiment has almost the same structure as the first embodiment described above, except that the connecting member 8 and the lifting member 1
3 through a rotary joint 20.

Therefore, even if the lifting member 13 is connected to the upper end of the jig main body 17 of the insert member 16, the insert jig 16
is rotatable about the longitudinal direction of the lifting member 13 as a central axis so that it can be inserted from both the inner and outer sides of the side wall of the U-shaped groove.

As shown in FIG. 7, the rotary joint 20 includes a shaft portion 21 and flanges 22, 2 provided at both ends of the shaft portion 21.
It consists of 2.

A recess 18 is formed in the joint 19 between the lower end of the connecting member 8 and the upper end of the lifting member 13.
The flange 22 of the rotary joint 20 and a part of the shaft portion 21 are attached to the rotary joint 8 in a rotating pair.

Next, the usage state of the present invention will be explained.

First, as shown in FIG. 2, the side walls 3 of the U-shaped groove A,
Insert the insertion rods 4, 4 from the outside side of 3 to lift up the U-shaped groove A, and turn it into an inverted U shape, that is, turn the U-shaped groove A placed face down 180 degrees to create a U-shaped shape. To,
In other words, turn it face up.

Therefore, the work of inverting the U-shaped groove A by 180 degrees and turning it face up cannot be carried out without inserting the insertion rods 4, 4 from the outside.

Thereafter, as shown in FIG.
4, 14, lift it up, move it to a predetermined installation position where the water line 2... is stretched, and then lower it.

At this time, since the insertion jigs 16, 16 are located on the inner surface side of the U-shaped groove A, there is no possibility that they will get in the way of the stretched water line 2 when lowering them.

[Effect of the invention] Thus, the present invention has the above-mentioned configuration, and with the lifting and reversing jig for a concrete U-shaped groove according to the present invention, even if the water line is stretched at the construction site, the water line can be easily removed. The U-shaped groove can be reversed and laid using the same lifting jig without removing it, and the construction work can be done quickly and easily, which is an excellent effect.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the construction state of the U-shaped groove, Figure 2
3 is a schematic cross-sectional view showing the usage state of the present invention, and FIG. 4 is a front view showing the first embodiment of the present invention.
Fig. 5 is a front view showing the second embodiment of the present invention;
The figure is an enlarged view of section B in FIG. 4, and FIG. 7 is an enlarged view of section C in FIG. A...Concrete U-shaped groove, 1...Ding, 2
... Water thread, 3 ... Side wall of U-shaped groove, 4 ... Insert rod,
5... Hanging member, 6... Locking part, 7... Hanging material, 8
...Connecting member, 9...Through hole, 10...Horizontal member, 1
1...Mounting hole, 12...Male thread part, 13...Lifting member, 14...Insertion hole, 16...Insertion jig, 1
7... Jig body, 18... Recessed part, 19... Joint part, 20... Rotating joint, 21... Shaft part, 22...
flange.

Claims (1)

[Claims for Utility Model Registration] A hanging member, a pair of connecting members connected to the hanging member, a horizontal member attached to the connecting member so as to be movable in the longitudinal direction, and a pair of connecting members hanging from the connecting member. a lifting member; a pair of insertion jigs each attached to the lifting member and each having an insertion rod inserted into an insertion hole drilled in a concrete U-shaped groove to be lifted; a shaft portion; A concrete U that includes flanges provided at both ends of the shaft, and a rotary joint that connects each connecting member and the end of each lifting member, or each insertion jig and the end of each lifting member. In the lifting and reversing jig for the groove, a recess is formed in one of the connecting member or the insertion jig and the end of the lifting member, and the recess is attached to the recess so as to form a pair around the flange of the rotary joint. A lifting and reversing jig for a concrete U-shaped groove, characterized in that the insertion rod is configured to be insertable from both the outer side and the inner side of the side wall of the concrete U-shaped groove.