JPH01236196A - Laying method for concrete u-shaped groove - Google Patents

Abstract

PURPOSE:To quickly and easily install a U-shaped groove without removing leveling strings when the U-shaped groove having overhangs on its outsides is laid by laying the U-shaped groove while inverting it, using a lifting inversion jig. CONSTITUTION:A lifting inversion jig B consists of hanging members 9, a horizontal member 10, connecting members 11, lifting members 6, and push-in jigs 8. One of the connecting members 11 has a through hole 12, and can be slidably fixed in each mounting hole 13 of the horizontal member by fixing with a pin. And the push-in jigs 8 are freely rotatably connected to the lower ends of the lifting members 6 through rotary joints 15. When a U-shaped groove A is laid, insert bars 7 are inserted from outer sides into lifting inversion holes 4 of the inverted U-shaped groove A, and the U-shaped groove A is lifted. Next, the U-shaped groove is inverted to a normal position for installation, and temporarily installed. After removing the insert bars 7 and rotating the push-in jigs 8 180 degrees, the jigs 8 are attached to the inside of the U-shaped groove A, and the U-shaped groove A is laid with its overhang members 5 hel along positioning ropes.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves stretching a positioning rope at a U-shaped groove laying position, and lifting a concrete U-shaped groove having an outwardly projecting portion using a lifting and reversing jig. , relates to a method of laying concrete U-shaped grooves in sequence along the 1l12 positioning ropes.

[Prior Art] In order to lay a concrete U-shaped groove A, as shown in Fig. 1, first a sill 1.1 is installed at the construction site, and then the floor is excavated and the floor leveled.

A positioning rope 2.2 with a predetermined height and radius is stretched around the rope, and a U-shaped A-shaped rope is attached to the positioning rope 2.2.
...is installed in a predetermined position.

[Problems to be Solved by the Invention] By the way, since the U'i-groove A is generally placed in an inverted U shape, that is, in an inverted state, it is turned 180 degrees using a lifting and reversing jig so that it faces up. It is necessary to turn it over and move it to the laying position.

However, as shown in Figure 2, the lifting and reversing jig B is
Side wall: Lift from outside of 3.3 and insert rod 7 into reversal hole 4.4
．． 7 is installed in the U-shaped groove A, so if the U-shaped groove A is lowered to the laying position, the lifting member 6 will come into contact with the positioning rope 2.2, so the positioning rope 2. .2 must be removed.

In particular, the overhang 5. where the U-shaped groove A projects outwardly into the side wall 3.3.
For the type with 5, the work becomes even more troublesome. For this reason, there are many problems such as the work becomes complicated, a lot of time is required, and the set position of the positioning row 12.2 may become incorrect.

The present invention was created to solve the above problems, and uses a lifting and reversing jig to lift up an inverted U-shaped groove, that is, a U-shaped groove placed in an inverted state, and turn it into a face-up state. To provide a method for laying a concrete U-shaped groove, which does not require removing a positioning rope each time when lowering the U-shaped groove to a laying position after being reversed 180 degrees, and the laying work can be easily and quickly performed. The purpose is to

[Means for Solving the Problems] The present invention provides the following steps: A positioning rope is stretched at the U-shaped groove laying position, the concrete U-shaped groove is lifted by a lifting and reversing jig, and the concrete U-shaped groove is sequentially laid along the positioning rope. The method for laying a concrete U-shaped groove includes forming an outwardly projecting part on the side wall, drilling a lifting and reversing hole at approximately the center of gravity on the outside of the side wall, and drilling a reversing hole approximately at the center of gravity on the outside of the side wall. A lifting hole is drilled at the center of gravity, and the lifting reversal jig includes a horizontal frame member to be lifted by a crane, a pair of lifting members attached to the horizontal frame members so that the interval can be freely adjusted, and a pair of lifting parts. an insertion jig which is attached to the lower end of the lifting member and can be rotated about the longitudinal direction of the lifting member as a central axis; an insertion rod inserted into a hole or a lifting hole, and by inserting the insertion rod of the lifting and reversing jig into the lifting and reversing hole from the outside of the U-shaped groove, and lifting and reversing the U-shaped groove. f? Temporarily install the J device, pull out the insertion rod from the reversing hole, insert it into the lifting hole from the inside of the U-shaped groove, lift the U-shaped groove, and move the overhanging part of the side wall of the U-shaped groove to the above-mentioned position. A method for laying concrete U-shaped grooves, which is characterized by sequentially laying the concrete U-shaped grooves while making contact with them along a positioning rope.

[Example code] Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 3 shows a lifting and reversing jig used in the present invention and a U-shaped groove that is lifted by the lifting and reversing jig.

The lifting and reversing jig B is composed of a hanging member 9, a horizontal member 10, a connecting member 11.11, a lifting member 6.6, and an insertion jig 8.8.

The hanging member 9 is connected to the upper end of the connecting member 11.11 and is latched to a hook of a lifting machine such as a crane.

A through hole 12 is bored in one of the two connecting members 11.11, and a plurality of attachment holes 13 are bored at predetermined intervals on one end side of the horizontal member 1O.・It is configured so that it can be slidably fixed with a locking pin. Further, the other connecting member 11 is formed with a female threaded portion, and is slidable by screwing into a male threaded portion 14 formed on the other end side of the horizontal member 10.

Further, a lifting member 6.6 on a chain is connected to the pair of connecting members 11.11 so as to hang down therefrom.

A plug-in jig 8.8 is connected to the lower end of the lifting member 6.6 via a rotary joint i5.15, and the plug-in jig 8.8 has its center axis in the longitudinal direction of the lifting member 6.6. It is rotatable.

The insertion jig 8.8 has an insertion rod 7.7 that is inserted into the lifting reversal hole 4.4 such as the U-shaped groove A to be lifted; The protrusion length can be adjusted freely.

The side wall 3.3 of the U-shaped groove A has a projecting portion 5 projecting outward.
．． 5 is formed. Further, a lifting and reversing hole 4.4 is bored approximately at the center of gravity of the side wall 3.3.

In this embodiment, the lifting reversal hole 4.4 is also used as a lifting hole and is therefore a through hole.

Next, the procedure for laying the U-shaped groove A will be explained.

First, as shown in Fig. 4, insert the insertion rod 7.7 from the outside into the lifting reversal hole 4.4 of the U-shaped groove A, which is placed in an inverted U-shape, that is, in an inverted state. lift up. U-shaped groove A
This is because the insertion rod 7.7 cannot be reversed unless it is inserted from the outside.

Next, as shown in FIG. 5, the lifting U-shaped groove A is reversed to change from the inverted state to a U-shaped state, that is, a state in which it can be installed.

Thereafter, as shown in Fig. 6, a U-shaped groove A is temporarily installed, the insertion rod 7.7 is removed, the insertion jig 8.8 is rotated 180 degrees, and the insertion rod 7 is inserted again from the inside. Lifting reversal hole 4.4
Insert into.

Lift up the U-shaped groove A again, lower it close to the installation position, and then move it laterally. Then, as shown in FIG. 7, the overhanging portions 5 of the side walls 3 of the U-shaped groove A are successively laid along the positioning ropes while making contact therewith.

In addition, when attaching the insertion rod 7.7 to the U-shaped groove A side wall 3 from the inside, a lifting hole is drilled in advance at the center of gravity of the inner side of the U-shaped groove A side wall 3, and the insertion rod is inserted into the lifting hole. 7.7 may be inserted.

In the above installation work, the insertion jig 8 and the lifting member 6 are
Since it is located on the inner side of the U-shaped groove A, the U-shaped groove A is located on the side wall 3.
．． Even in the case of the type having an overhanging portion 5.5 at 3, the lifting member 6 does not come into contact with the positioning rope 2.2 during work, and there is no possibility that the positioning rope 12.2 will interfere with the work.

[Effects of the Invention] The present invention has the above-described configuration, and the method for laying a concrete U-shaped groove according to the present invention is such that the U-shaped groove has an outwardly projecting portion on the side wall, and is easy to install. Even if the water system is installed at the site, the U-shaped groove can be reversed and laid using the same lifting jig without removing the water system, making the construction work quick and easy. It is something that plays.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the construction state of the U-shaped groove, Fig. 2 is a schematic diagram showing the conventional laying method, and Fig. 3 is a front view of the lifting and reversing jig used in the U-shaped groove laying method of the present invention. 4 to 7 are schematic diagrams showing the construction procedure of the method for laying a U-shaped groove according to the present invention. A... Concrete U-shaped groove B... Lifting reversing jig 1... Tingling 2... Positioning rope 3... S wall 4... Lifting reversing hole 5... Overhang 6... Lifting member 7... Insertion rod 8...Insertion jig 9...Hanging member 10...Horizontal member 11...Connecting member 12...Through hole] 3...Mounting hole 14...Male thread part 15...Rotary joint No. 3 Figure 4 Figure 614 □□□ 5121 Figure 7

Claims (1)

[Scope of Claim] A method for laying a concrete U-shaped groove, in which a positioning rope is stretched at a U-shaped groove laying position, the concrete U-shaped groove is lifted up by a lifting and reversing jig, and the concrete U-shaped groove is sequentially laid along the positioning rope. In the concrete U-shaped groove, an outwardly projecting part is formed on the side wall, a lifting hole is bored at approximately the center of gravity on the outside of the side wall, and a lifting hole is formed at approximately the center of gravity on the inside of the side wall. The lifting and reversing jig is provided with: a horizontal member to be lifted by a crane; a pair of lifting members attached to the horizontal members so that the interval can be freely adjusted; An insertion jig that can be rotated around the longitudinal direction of the member as a central axis; and an insertion jig that is attached to the insertion jig so that its protrusion length can be freely adjusted, and that is inserted into the lifting reversal hole or the lifting hole of the concrete U-shaped groove. Insert the insertion rod of the lifting and reversing jig into the lifting and reversing hole from the outside of the U-shaped groove, lifting and reversing the U-shaped groove to temporarily install it from the inverted state, and Pull out the insertion rod from the reversing hole, insert it into the lifting hole from the inside of the U-shaped groove, lift the U-shaped groove, and sequentially lay it along the positioning rope while making contact with the overhanging part of the side wall of the U-shaped groove. A method for laying a concrete U-shaped groove.