JPH0485459A - Setting of concrete panel and panel hanger tool therefor - Google Patents

Abstract

PURPOSE:To prevent damage to concrete panels as well as speed up operations, save power for operations, and raise the safety of operation by a method in which a hole through which a rigid bar is to be inserted horizontally from the side of a coupler is provided, and the opening is tapered or curved so as to open it outwards. CONSTITUTION:Two couplers 14 screwed with male screw 7 are inserted into the second holes 3 of a concrete panel 1, and two rigid bars 9 are inserted into the first holes 2 of the panel 1 from the long small face 1a. The couplers 4 are fixed inside the panel 1 and the hook 32a of a wire rope 32 is coupled with the screw 7 of the coupler 4. The concrete panel 1 is hung up by operating a crane and carried to a placing position. The panel 1 is lowered to a placing position in such a way as to closely contact it with the small face of the already set panel 1. The bars 9 and the couplers 4 are removed from the panels 1, and the operation are repeated to closely place the panels 1.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a method for laying concrete panels on horizontal areas such as floors and roofs of structural bodies, and a lifting jig for concrete panels used in the method. It is related to.

[Prior Art] In order to lay a concrete panel as a floor panel on the floor of a structural frame, for example, the concrete panel is first lifted in a substantially horizontal state and transported to the floor, and then the concrete panels are sequentially lowered onto the floor. Therefore, it is necessary to lay multiple concrete panels with no gaps between them.

Conventionally, as a jig for lifting this concrete panel in a substantially horizontal state, as shown in FIG. A receiving member 31 and, as shown in FIG. 9, a sling 34 that is wrapped around the outer periphery of the concrete panel 1 and similarly lifted by a crane are known.

[Problems to be Solved by the Invention] With this conventional receiving member 31 and sling 34, when lifting a plurality of concrete panels 1 stacked one on top of the other, the back side of the concrete panel 1 to be lifted and the remaining concrete panel 1 the receiving member 31 between the surface of the
A gap is required for passing the sling 34. Therefore, in order to create a gap, it is necessary to lift the concrete panel a little by hand, but this is very difficult because the concrete panel 1 is heavy.

Furthermore, when the concrete panels 1 are lowered onto the floor and laid on each other without any gaps, the following problem arises.

That is, since the receiving member 31 and the sling 34 always protrude slightly outward from the edge surface of the concrete panel 1, simply lowering the concrete panel 1 will cause the edge surface (
(small end) could not be brought into close contact.

In addition, the receiving member 31 and sling 34 have a structure that prevents them from being removed if the concrete panel 1 is lowered too close to the adjacent concrete panel. I had to temporarily place it in the correct position and then remove it.

In addition, in order to remove the receiving member 31 and sling 34, it is necessary to lift the concrete panel 1 slightly from the floor of the structural frame, so there is a risk of getting your fingers caught in the lifted gap and causing injury. there were.

Next, the concrete panel 1 from which the receiving member 31 and the sling 34 have been removed had to be pushed and shifted by hand until the concrete panel 1 was in contact with the adjacent concrete panel without any gaps, which required very hard labor. There was also a risk of damaging the concrete panel 1.

The purpose of the present invention is to solve the above-mentioned problems, and when laying multiple concrete panels on a horizontal part of a structure, it is possible not only to safely lift and transport the concrete panels, but also to simply lower the concrete panels. The concrete panel can be placed in close contact with the edge side of an adjacent concrete panel that has already been laid without any gaps, and the lifting jig can be easily removed from the concrete panel even if it is in close contact with the concrete panel, thereby speeding up the concrete panel laying work. The purpose of the present invention is to provide a method for laying a concrete panel that can reduce energy consumption, save labor, improve safety, and prevent damage to the concrete panel, and a lifting jig used in the laying method.

[Means for Solving the Problems] In order to achieve the above object, the concrete panel lifting jig of claim 1 is inserted into a first hole drilled from the edge surface of the concrete panel in the direction inward of the panel surface. a rod-shaped rigid body, and a connecting part connected to a lifting drive means at the upper part, and is inserted into a second hole drilled from the surface of the concrete panel in a direction crossing the panel surface so as to intersect with the first hole, A lifting jig consisting of a locking member that locks the rod-shaped rigid body inside a concrete panel, the lifting jig having an insertion hole through which the rod-shaped rigid body is removably inserted in a horizontal direction from a side surface of the locking member. At the same time, the opening of the insertion hole has a tapered or curved shape that becomes wider toward the outside.

Here, the "panel surface crossing direction" includes not only a direction perpendicular to the surface of the concrete panel but also a direction diagonally crossing the surface of the concrete panel.

In addition to the concrete panel lifting jig according to claim 1, the concrete panel lifting jig according to claim 2 has an insertion length from the surface of the concrete panel to the insertion hole when the locking member is inserted into the second hole. The locking member is provided with an insertion length adjusting means for adjusting the insertion length.

The method for laying a concrete panel according to claim 3 includes the steps of inserting the locking member into the second hole from the surface of the concrete panel and aligning the insertion hole of the locking member with the first hole; a step of locking these locking members and the rod-shaped rigid body inside the concrete panel by inserting the locking members into the sixth and the insertion holes from the edge surface of the concrete panel, and a connecting portion of the locking members. a step of connecting a lifting driving means to the lifting driving means and driving the lifting driving means to lift the concrete panel and transport it to a laying position; The method is comprised of a step of lowering the rod-shaped rigid body to the installation position so as to be in close contact with the holder, and a step of removing the rod-shaped rigid body from the first hole and removing the locking member from the second hole.

[Function] According to the concrete panel lifting jig of claim 1 and the concrete panel laying method of claim 3, the rod-shaped rigid body is inserted through the insertion hole and enters close to the opposite side face,
The locking member is locked inside the concrete panel. When this rod-shaped rigid body is inserted into the insertion hole, the rod-shaped rigid body is guided by the tapered opening of the insertion hole and can be easily inserted through the insertion hole. In addition, since the rod-shaped rigid body is housed inside the first hole so that it does not at least protrude from the edge surface of the concrete panel that is in contact with the adjacent concrete panel that has already been laid, the concrete panel to be transported is It can be operated by the lifting drive means to the final position without any gaps. In addition, even if the edge surface of a concrete panel to be laid is brought into close contact with the edge surface of an adjacent concrete panel, the locking member can be easily removed from the surface of the concrete panel, and the rod-shaped rigid body can be easily removed from the edge surface that is not in close contact. be able to.

According to the concrete panel lifting jig of claim 2, when inserting the locking member into the second hole, the insertion length adjusting means is moved up and down to freely adjust the insertion length from the concrete panel surface to the insertion hole. The first hole and the insertion hole can be easily matched by changing the hole. Even when the thickness of the concrete panel is different and the depth from the concrete panel surface to the first hole is different, this can be handled by moving the insertion length adjusting means up and down. Moreover, when inserting the rod-shaped rigid body, the insertion length adjusting means maintains a state in which the first hole and the insertion hole match.

[First Embodiment] Hereinafter, a first embodiment of a concrete panel lifting jig embodying the present invention will be described with reference to FIGS. 1 to 5.

First, to explain the concrete panel 1 processed so that this lifting jig can be used, there are two elongated first holes with a circular cross section extending from the long side edge surface 1a of the concrete panel 1 in the inward direction of the panel surface. 2 is approximately the center of the concrete panel 1 in the thickness direction and the long side edge surface 1
These first holes 2 are drilled symmetrically with respect to the center of the hole a, and these first holes 2 penetrate to the opposite long side edge surface 1b. Further, in the direction orthogonal to the panel surface from the surface of the panel 1, there is a second hole 3 that intersects approximately the center of the first hole 2, or a second hole 2 that intersects with the first hole 2.
The hole is drilled with a diameter slightly larger than that of the hole.

Two of these second holes 3 are provided at symmetrical positions with respect to the center of the surface of the concrete panel 1, approximately in the center of the concrete panel 1 in the transverse direction, and penetrate to the back surface of the panel 1. has been done.

Now, in the lifting jig of this embodiment, a locking member 4 formed of a metal material into a substantially cylindrical shape is inserted into the second hole 3. 20 A female threaded hole 5 as a connecting part is formed inside the upper end of the locking member 4, and the female threaded hole 5 has an annular upper end and is used for lifting and driving means together with a crane or wire row 132 (not shown). The formed male threaded member 7 is connected in a screwable and retractable manner. In addition, an insertion hole 8 is provided at the lower side of the locking member 4.
is provided so as not to intersect with the female screw hole 5.

This insertion hole 8 is formed so that a rod-shaped rigid body 9 inserted into the first hole 2 can be inserted and removed therethrough, and the openings 8a on both sides of the insertion hole 8 are as shown in FIG. It is formed into a widening tapered shape. This tapered opening 8a serves as a guide and facilitates insertion of the rod-shaped rigid body 9. Further, the rod-shaped rigid body 9 is formed of a metal material and has a circular cross section, and is formed to be slightly shorter than the panel width between the long sides 1a and lb of the concrete panel 1.

Next, a method of laying concrete panels using the concrete panel lifting jig configured as described above will be explained.

(1) Insertion process of locking member 4.

As shown in FIG. 4, the male screw member 7 is screwed into the two locking members 4 in advance, and the two locking members 4 are inserted so that their insertion holes 8 are parallel to the first hole 2. Insert it into the two second holes 3 of the concrete panel 1 from the panel surface according to the orientation, and maintain the insertion length from the surface of the concrete panel 1 to the insertion hole 8 to match the depth to the first hole 2. do.

(2) A step of locking the locking member 4 and the rod-shaped rigid body 9.

As shown in FIG. 5, two rod-shaped rigid bodies 9 are
, insert into the two first holes 2 of the panel 1 from the long side edge surface 1a side. These rod-shaped rigid bodies 9 pass through the insertion holes 8 and enter near the long side edge surface 1b on the opposite side, and lock the locking members 4 inside the concrete panel 1, so that the locking members 4 Can't get out of 2 holes 3. When the rod-shaped rigid body 9 is inserted into the insertion hole 8, the rod-shaped rigid body 9 is kited by the tapered opening 8a of the insertion hole 8, and can be easily inserted through the insertion hole 8. Further, the rod-shaped rigid body 9 is housed inside the first hole 2 and does not protrude from both vehicle mouth surfaces 1a and lb.

(3) A process of lifting the concrete panel 1 and transporting it to the laying position.

The hook 32a of the wire lobe 32 is hooked to the male screw member 7 connected to the locking member 4, and the crane is driven to lift the concrete panel 1 and transport it to the laying position.

Here, since the two second holes 3 to be locked are arranged symmetrically with respect to the center of the panel 1, the concrete panel 1 is held horizontally and suspended.

Incidentally, the male screw member 7 and the wire row 132 may be connected to the locking member 4 in this step.

(4) The step of lowering the concrete panel 1 to the laying position so that it comes into close contact with the edge surface of the concrete panel 1 that has already been laid at the laying position.

At this time, the concrete panel 1 maintains a horizontal state, and there is nothing protruding from the edge surface 1b that contacts the adjacent concrete panel, so all you have to do is lower the concrete panel 1 by operating the crane. It can be closely attached to the edge of the adjacent concrete panel without any gaps.

(5) Step of extracting the rod-shaped rigid body 9 and the locking member 4 from the concrete panel 1.

Even if the long side edge surface 1b of the concrete panel 1 to be laid is brought into close contact with the edge surface of the adjacent concrete panel, the holes 1a and 1b of the concrete panel 1 can be opened from the second hole 3 on the surface of the concrete panel 1 and the first hole 2 of the long side edge surface 1a that is not in close contact. The locking member 4 and the rod-shaped rigid body 9 can be easily removed.

Therefore, unlike conventional methods, in order to remove the lifting jig, the concrete panel 1 must be temporarily placed in a position away from the adjacent concrete panel, and then moved by hand.
Since there is no need to lift the structure slightly from the floor, it speeds up the work of laying concrete panels, saves labor,
It is possible to improve safety and prevent damage to concrete panels.

Thereafter, the operations (1) to (5) above are repeated to lay a plurality of concrete panels 1 without gaps.

Here, when laying the last concrete panel 1,
There are cases where the long side edge surface 1a overlaps a part of the structural frame and the rod-shaped rigid body 9 cannot be removed, but in this case, the rod-shaped rigid body 9 and the locking part 'N4 are left as they are in the concrete panel 1. , embed with mortar etc. At this time,
It is convenient to use a locking member whose upper part does not protrude from the upper edge of the second hole 3 so that it can be completely embedded inside the concrete panel 1. ``Furthermore, even if the locking member does not have its upper part protruding from the upper edge of the second hole 3, since the male screw member 7 is screwed in and protrudes from the surface of the concrete panel 1, the hook 32a etc. Can be easily connected.

[Second Embodiment] Next, in a second embodiment shown in FIGS. 6 and 7 (a>(b)), a male threaded portion 14a is carved on the upper outer periphery of the locking member 14, and the male threaded portion This embodiment differs from the first embodiment only in that a collar-shaped insertion length adjusting means 15 is provided which is relatively rotatably screwed into the locking member 14a and moves in the axial direction of the locking member 14.

When inserting the locking member 14 of this embodiment into the second hole 3, as shown in FIG. Vary the insertion length to be longer. Thereby, the first hole 2 and the insertion hole 8 can be matched accurately and easily. Furthermore, as shown in FIG. 7(b), even when the thickness of the concrete panel 1 is a little thin, the insertion length adjusting means 15 changes the insertion length from the surface of the concrete panel 1 to the insertion hole 8 to be shorter. By this, the first hole 2
and the insertion hole 8 can be made to match. Furthermore, when inserting the rod-shaped rigid body 9 into the insertion hole 8 of the locking member 14,
The adjustment means 1 is in a state where the first hole 2 and the insertion hole 8 are aligned.
Since it is not necessary to hold the locking member 14 by hand, the insertion work can be speeded up and simplified.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and may be modified and embodied as desired without departing from the spirit of the invention, for example, as described below.

(1) The connecting portion is not limited to a female threaded hole, and may be formed with, for example, a male portion or a female portion of a bayonet joint. However, in the former case, it is necessary to have a female threaded member connected to the crane, etc., and in the latter case, it is necessary to form a male part of a bayonet joint connected to the crane, etc.

(2) The number of second holes is not limited to two, but may be two if the concrete panel is small, or three or more if the concrete panel is large.

(3) The second hole is not limited to being bored in a direction perpendicular to the panel surface, but may be, for example, in a direction parallel to the wire rope to be lifted and diagonally intersecting the panel surface.

This can prevent the concrete panel from chipping due to the side surface of the locking member hitting the upper edge of the second hole.

(4) The length of the rod-shaped rigid body may be slightly longer than the panel width. This rod-shaped rigid body does not completely fit into the first hole and cannot be removed, and can be easily extracted from the concrete panel by protruding toward the long side edge surface 1a.

(5) A stopper may be provided at one end of the rod-shaped rigid body to prevent the entire rod-shaped rigid body from entering the first hole.

"Effects of the Invention" Since the concrete panel lifting jig of the present invention is configured as described above, it exhibits the following excellent effects.

According to the concrete panel lifting jig of claim 1 and the concrete panel laying method of claim 3, when laying a plurality of concrete panels on a horizontal portion of a structural frame, it is possible to safely lift and transport the concrete panels. In addition to this, by simply lowering the concrete panel, it can be brought into close contact with the adjacent concrete panel that has already been laid without any gaps, and even if the concrete panel is brought into close contact in this way, the lifting jig can be easily removed from the concrete panel. As a result, it is possible to speed up the concrete panel laying work, save labor, make it safer, and prevent damage to the concrete panel.

In addition to the above-mentioned effects, the concrete panel lifting jig of the second aspect allows the first hole and the insertion hole to be matched accurately and easily. Further, even when using concrete panels having different thicknesses, it can be handled in the same way. Furthermore, it is possible to speed up and simplify the operation of inserting the rod-shaped rigid body into the locking member.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a first embodiment embodying the present invention;
The figure is a perspective view of the locking member, FIG. 3 is a sectional view of the main part of the locking member, and FIG. 4 is a perspective view showing the state of use.
FIG. 5 is a perspective view similarly showing the state of use, FIG. 6 is a perspective view of the second embodiment, FIGS. 7<a) and (b) are front views similarly showing the state of use, and FIGS. 8 and 9 is a perspective view of a conventional example. 1... Concrete panel, la, lb... Long side edge surface, 2... First hole, 3... Second hole, 4.14... Locking member, 5... Connection part 7. A male threaded member as a lifting drive means, 8.
- Insertion hole, 8a... Opening, 9... Rod-shaped rigid body, 15... Insertion length adjustment means, 32... Wire rope as lifting drive means.

Claims (1)

[Claims] 1. Edge surfaces (1a, 1b) of concrete panel (1)
A rod-shaped rigid body (9) is inserted into a first hole (2) drilled inward from the panel surface, and a lifting drive means (7,
32), and a second hole (3) bored from the surface of the concrete panel (1) in a direction crossing the panel surface so as to intersect with the first hole (2). A lifting jig consisting of a locking member (4) that is inserted and locks the rod-shaped rigid body (9) inside the concrete panel (1), the lifting jig comprising a locking member (4) that is inserted horizontally from the side of the locking member (4). An insertion hole (8) through which the rod-shaped rigid body (9) is removably inserted is provided in the direction of the insertion hole (8).
) The opening (8a) of the concrete panel has a tapered shape or a curved shape that widens toward the outside. 2. An insertion length adjusting means (15) for adjusting the insertion length from the surface of the concrete panel (1) to the insertion hole (8) when the locking member (14) is inserted into the second hole (3). The concrete panel lifting jig according to claim 1, wherein the jig is provided on the locking member (14). 3. Insert the locking member (4) into the second hole (3) from the surface of the concrete panel (1), and insert the locking member (4) into the second hole (3).
a step of aligning the insertion hole (8) with the first hole (2), and inserting the rod-shaped rigid body (9) from the edge surface (1a, 1b) of the concrete panel (1) into the first hole (2) and the By inserting into the insertion hole (8), the concrete panel (
1) locking the locking member (4) and the rod-shaped rigid body (9) inside the locking member (4); and providing a lifting drive means (7, 32) to the connecting portion (5) of the locking member (4). and the lifting drive means (7, 3
2) lifting the concrete panel (1) and transporting it to the laying position;
a step of lowering the rod-shaped rigid body (9) from the first hole (2) so that it comes into close contact with the edge surface of the concrete panel already laid at the installation position, and removing the locking member ( 4) A method for laying a concrete panel including the step of extracting the material from the second hole.