JPH07269114A - Fastening fitting for form - Google Patents

Abstract

PURPOSE:To fix a sheathing board to a supporting member for supporting it by mutually fastening the sheathing board and a end thick material through a supporting plate arranged at the one end of a rod piercing the sheathing board and a washer arranged at the other end of the rod. CONSTITUTION:A rod 18 is inserted through the through hole 16 of a sheathing board 12, and its open end 18a is regulated by a flange 28, and a joint bolt 20 is screwed into a screw hole 26 provided at the open end 18a, and a nut 22 is threadedly engaged with the joint bolt 20 to fix a supporting plate 24. Next, a washer 40, a spring washer 44 and a nut 42 are insertedly fitted on the other end 18b of the rod 18. When the nut 42 is threadedly advanced, pressing force acts on longitudinal end thick materials 15, 15 and a lateral end thick material 17 through the spring washer 44 and the washer 40. Thus the sheathing board 12 and both the end thick materials 15, 17 are mutually fastened between the washer 40 and the supporting plate 24, and the sheathing board 12 is thereby fixed to the end thick materials 15, 17. Thus the nuts of attaching fittings can be prevented from slipping down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening member for fixing a weir plate to a support member which is a part of a support work.

[0002]

2. Description of the Related Art When forming columns, beams, walls, etc. of a building, after placing concrete in the space defined by the weir plate, it is used together with the concrete as a part of the building without demolding. Is being done. The weir plate is provided with ridges and recesses for reinforcing it and for increasing the bonding strength with concrete, and for the support by the support work is provided with through holes extending through the ridges or recesses. ing.

Conventionally, a fastening member for fixing a dam plate to a supporting member such as a thick material forming a part of the supporting work is a rod having an open one end provided with a screw hole, and a screw of the rod. A joint bolt having one end screwed into the hole and the other end received in the hole of the dam plate, a nut screwed to the other end of the joint bolt, and provided at the other end of the rod. And a pressing unit configured by a wedge inserted in the elongated hole to apply a reaction force to the other end of the rod to press the support member toward the dam plate.

[0004] When installing the formwork, the tightening metal fitting is such that the joint bolt is screwed into the nut, the joint bolt is inserted into the through hole of the dam plate from the concrete driving side, and then the rod is connected to the joint. It is retained on the barrier plate by being screwed onto a bolt. A plurality of weir plates to which a part of the tightening fittings are attached are built in predetermined positions, and then the wedge plate is inserted into the elongated hole at the other end of the rod to support the weir plate to the support member. And the nut to fasten it to the support member.

[Problems to be Solved by the Invention]

By the way, the tightening is performed due to vibrations caused on the dam plate and the support plate due to work performed after the dam plate is set up and before the insertion of the wedge is completed, and carelessness in the work. A screw may loosen between the joint bolt and the nut of the metal fitting, and the nut may drop into the concrete pouring space due to the separation of the two. Since the concrete placing space is surrounded by a plurality of weir plates, the weir plate must be disassembled in order to attach a new nut to the joint bolt. This causes a delay in construction work, wastes time and labor, and reduces work efficiency.

Another object of the present invention is to prevent the nut of the tightening fitting held by the dam plate from falling. It is also an object of the invention to improve the fastening hardware.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a fastening member for fixing a weir plate provided with a ridge and a through hole extending through the ridge to a support member forming a part of the supporting work, A rod having an open end provided with a screw hole;
A joint bolt having one end screwed into the screw hole of the rod and the other end received in the hole of the dam plate, a nut screwed to the other end of the joint bolt, and fixed to the nut. Support plate having a pair of bent portions sandwiching both side portions of the protrusion of the dam plate, the support member having the other end portion of the rod carrying a reaction force. Pressing means for pressing toward.

The present invention also relates to a fastener for fixing a dam plate having a groove and a through hole extending through the groove to the support member.
The support plate that supports the nut has a pair of bent portions that are received in the recessed lines of the dam plate and press both side walls of the recessed lines.

The support member is made of thick end material, and the washer is inserted into the other end of the rod and is in contact with the thick end material, and a nut screwed to the other end of the rod. Equipped with. Further, a spring washer which is inserted into the other end of the rod and is located between the washer and the nut is included.

[0010]

The present invention provides an improved fastener. According to this tightening hardware, by pressing the support member toward the dam plate by the pressing means, it is possible to tighten the dam plate and the support member between the pressing means and the support plate, This allows
The dam plate can be fixed to and supported by the support member.

According to the present invention, since the support plate has a pair of bent portions that sandwich both sides of the protrusion of the dam plate, the support plate is provided between the both folded portions and the protrusion. It is held on the barrier plate by frictional engagement. Therefore, the nut fixed to the support plate is reliably held in the through hole of the dam plate regardless of whether the nut is screwed into the joint bolt. As a result, it is not necessary to re-attach the nut, which is a conventional defect, at the time of building the dam plate and after the build-in of the dam, and dismantling the dam plate accompanying the fall of the nut. it can.

In the case of a weir plate having a recess, the support is provided by friction between a pair of bent portions which are received in the recess of the weir plate and press both side walls of the recess and the both side walls. The plate and the nut fixed to the plate are securely held by the dam plate. Since the support plate of the nut has elasticity, elastically deforming the support plate allows easy engagement between both bent portions of the nut and both side walls of the protrusion or both sides of the recess.

Further, according to the present invention, it is possible to previously attach the nut to the weir plate in a weir plate manufacturing factory, which enables the nut installation work in the construction site which has been conventionally required. It can be unnecessary.

Further, the size of the support plate can be set arbitrarily, and thereby, the size of the support plate from the support plate when tightening the dam plate between the support plate and the support member can be extended. It is possible to adjust the pressing force per unit area, which can prevent the occurrence of cracks in the weir plate made of a cement-based material due to excessive tightening.

The support member is made of thick end material, the pressing means is inserted into the other end of the rod and is in contact with the thick end material, and the nut is screwed to the other end of the rod. When it consists of, by advancing the nut screwed to the other end of the rod and the washer toward the one end of the rod, the weir plate and the end thicker between the washer and the support plate. Can be tightened with materials.

Further, if a spring washer is passed through the other end of the rod and is arranged between the washer and the nut, the tightening amount of the nut is determined by the degree of elastic deformation of the spring washer when tightening the nut. Can be confirmed, and thereby, excessive tightening can be prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 10 generally indicates a fastening member which is a part of a supporting work together with a supporting member such as a thick material for supporting a dam plate.

The weir plate 12 to which the tightening hardware 10 is applied has one or a plurality of ridges 14 formed on the surface 13 which contacts the concrete, that is, the surface 13 which defines the casting space for the concrete.
And a through hole 16 extending through the protrusion 14. Although the protrusion 14 shown in the drawing extends in the vertical direction, it may extend in the lateral direction, the oblique direction, or the like.

The barrier plate 12 is made of a cement material. For example, a pressure-molded board of a mixture of cement and wood fibers, a paper-made gypsum board reinforced with glass fibers, etc.
It has a thickness of mm. The dam plate 12 made of the cement-based material is used for carrying out a so-called casting form construction method. In this method, the dam plate 12 is left without being removed from the mold, and pillars, beams, walls, etc. of a building are placed together with the cast concrete. Make up. The projections 14 of the barrier plate 12 reinforce the barrier plate 12 and enhance the bonding strength between the barrier plate 12 and the concrete.

The barrier plate 12 is
It is fixed to a support member that forms a part of the supporting work, in the illustrated example, a vertical end thickness 15 and a horizontal end thickness 17 that are vertically and horizontally assembled. The tightening hardware 10 includes a rod 18 extending in the lateral direction through a pair of vertical end thicknesses 15 and a pair of lateral end thicknesses 17 (only one of which is shown), and the rod 1.
Joint bolt 20 that is connected to 8 and extends through the through hole 16 of the dam plate 12, a nut 22 that is screwed into the joint bolt 20, a support plate 24 for the nut 22, and a thick piece 1
Pressing means 2 for pressing 5, 17 toward the barrier plate 12
5 and 5.

The rod 18 extending coaxially with the axis of the through hole 16 of the barrier plate 12 has an open end portion 18a provided with a screw hole (female screw) 26 and another end portion 18b provided with a male screw.
Have and. The rod 18 has a flange 28 defining its open end. The flange 28 is the through hole 16 of the barrier plate 12.
Is in contact with the back surface 30 of the barrier plate so as to cover the open end.

The joint bolt 20 has both ends provided with male threads, and one end 20a thereof is the screw hole 2 of the rod.
Screwed to 6. The joint bolt 20 is screwed with the nut 20 at the other end 20b.

The nut 22 is preferably a long nut, a part of which is inside the through hole 16 of the dam plate 12, and the remaining part of which is projected from the surface 13 of the dam plate 12 to the outside. Instead of this example, as shown in FIG. 3, all of the long nuts 22 can be arranged so as to be located outside the through hole 16. According to this, the through hole 16 can pass the joint bolt 20 having a diameter smaller than that of the long nut 22. Since the diameter can be made smaller than that of the example shown in FIG. 1, by providing the through hole 16. The decrease in strength of the dam plate 12 that occurs can be suppressed. In any of the examples, the long nut 22 is made to project toward the front surface 13 side of the weir plate 12, which is the side on which concrete is placed, and the back surface 14
Do not let it project to the side of. This is the back surface 14 of the barrier plate 12.
This is because it is desirable to have a flat surface for finishing work performed later.

The support plate 24 shown in the figure has a rectangular planar shape as a whole (see FIG. 2), and is made of an elastic plate such as a plastic plate or a steel plate. The support plate 24 includes a pair of bent portions 32 that are in contact with both side portions 14a of the ridge 14 of the barrier plate 12 and sandwich the both side portions 14a, and a tubular portion through which the long nut 22 penetrates and the long nut 20 is fixed. 34 and a flat plate portion 36 which is continuous with both the bent portions 32 and the tubular portion 34 and is in contact with the flat top surface 14b of the ridge 14, and holds the long nut 22 on the axis of the through hole 16 of the dam plate 12. To do. Reference numeral 37
Is used to fix the long nut 22 to the support plate 24.
Shows a ring embedded in. The ring 37 has a tubular portion 3
4 are arranged concentrically with each other and face the ridge 14. The ring 37 surrounds and is secured to the long nut 22.

The support plate 24, and thus the long nut 22, is
Due to the frictional force acting between the both bent portions 32 and both side portions 14a of the ridge 14, the ridge 14 is held at a predetermined position. The nut 22 and the support plate 24 can be attached in the manufacturing factory of the dam plate 12 before carrying them into the construction site, which can reduce the work on the site. The bending angle of each bent portion 32, that is, the angle formed by the bent portion 32 and the flat plate portion 36 is preferably smaller than the system incident angle α of each side surface of the ridge 14. According to this
When the bent portion 32 is hooked on the side surface 14a of the ridge, the bent portion 32 elastically deforms so as to increase the bending angle and strongly presses the side surface 14a of the ridge.
A larger frictional force can be obtained, and the support plate 24 can be more firmly fixed to the dam plate 12.

When the nut 22 is attached to the barrier plate 12, the support plate 24 has elasticity, so that one of the bent portions 3
2 is hooked on one side portion 14a of the ridge and the nut 22 is inserted into the through hole 16 of the barrier plate, and then the other bent portion 14
a and a part of the flat plate portion 36 in the vicinity thereof can be curved, and the other bent portion 14a can be hooked on the other side portion 14a of the ridge, whereby the support plate 24 is formed on the weir plate ridge 1.
It can be fixed to 4. The joint bolt 20 and rod 18 are installed at the construction site.

The planar shape of the flat plate portion 36 of the support plate 24 can be set to another polygonal shape, a circular shape or the like instead of the illustrated example. In addition, the bent portion 32 of the support plate 24 and the flat plate portion 3
The size of 6 can be set arbitrarily. Further, the bent portion 32 may be, instead of the example shown in the figure, a member having a smaller vertical length than the flat plate portion 36, a comb-shaped member, or the like. Furthermore, in order to increase the rigidity of the flat plate portion 36, it is desirable to provide a plurality of ribs 38. However, the rib 38 is
In order to maintain the bendability in the vicinity of the bent portion 32, it is not provided in this portion.

The pressing means 25 includes a washer 40 passed through the other end 18b of the rod provided with a male screw, and the other end 18b.
And a nut 42 screwed together. The washer 40 is composed of a metal piece elongated in the lateral direction as a whole, and has a pair of arc-shaped surfaces 40a that are in contact with a part of the peripheral surfaces of both vertical end thicknesses 15.

The pressing means 25 preferably further comprises a spring washer 44 which is inserted through the other end 18b of the rod and is located between the nut 42 and the washer 40. According to the pressing means 25, when the nut 42 is rotated and advanced toward the one end portion 18a of the rod, the nut 42 passes through the spring washer 44 and the washer 40, and the vertical end 1
5 and the lateral end thick 17 are pressed. At this time, the other end 18b of the rod bears the reaction force exerted on the nut 42. As a result, the weir plate 12 and the thick pieces 15, 17 are the washers 4
0 and the support plate 24 are fastened to each other, whereby the dam plate 12 is fixed and supported by the thick ends 15, 17 which are a part of the supporting work.

Weir plate 1 to be tightened by nut 42
Reference numeral 2 denotes a surface 13 of the support plate 24 having an area larger than the cross-sectional area of the long nut 22, more specifically, the flat plate portion 3
Touch 6. For this reason, the pressing force per unit area that the dam plate 12 receives from the support plate 24 is smaller than that of the conventional tightening fitting in which the long nut 22 is configured to contact the surface of the dam plate 12. Therefore, damage to the dam plate 12 due to tightening can be prevented.

When the nut 42 is tightened through the spring washer 44, the tightening force is determined by the spring force of the spring washer 44, so the washer 40
Unlike when tightening the nut 42 that directly contacts the
Excessive tightening of the barrier plate 12 can be prevented. Needless to say, the magnitude of the spring force of the spring washer 44 is determined in consideration of the size of the support plate 24, the strength of the dam plate 12, and the like.

Referring to FIG. 4, one or more recesses 4
The clamps 48 applied to the weir plate 12 with 6 are shown. The fastening fitting 48 differs from the fastening fitting 10 in the structure of the bent portion of the support plate and in that the through hole 16 extends through the recess 46.
Both folds 50 in this example are received by the recess 46 of the barrier plate and press the inclined side walls 49 of the recess.

Each bent portion 50 is bent to the side opposite to the bent portion 32 shown in FIG. 1, that is, to the side of the concrete placing space, and extends at a right angle to the flat plate portion 36 (shown by an imaginary line). When the support plate 24 is used, the flat plate portion 36
And both of the bent portions 50 are elastically deformed and inserted into the concave line 46. As a result, the flat plate portion 36 becomes the bottom wall 52 of the recess 50.
And the bent portions 50 are elastically deformed toward each other toward the other side wall 49 of the groove 46.
For this reason, a large frictional force is generated between the both bent portions 50 and the side walls 49, and the support plate 24 and the nuts 22 are locked by the dam plate 1.
It is held at 2. In this example as well, similarly, the nut 22 can be supported by the support plate 24 so as to be outside the through hole 16 of the dam plate 12.

The recess 46 shown in FIG. 4 is defined by the pair of protrusions 14. It should be noted that an end portion of a rod-shaped separator 60 for maintaining a distance between the barrier plates facing each other can be received on the side of the casting space of the nut 22. Further, the pressing means is, instead of the illustrated example, inserted into an elongated hole (not shown) provided at the other end of the rod 18 and extending in the longitudinal direction thereof to apply a pressing force to the thick vertical end 15 (see FIG. (Not shown).

The long nut 22 and the support plate 24 of the components of the tightening tool 10 are buried in the cast concrete, and the rest can be reused.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a tightening fitting applied to a weir plate having a ridge.

FIG. 2 is a side view of the tightening fitting shown in FIG.

FIG. 3 is a partial cross-sectional view of a modified example of the fastening fitting shown in FIG.

FIG. 4 is a partial transverse cross-sectional view of a fastening fitting applied to a dam plate having a concave streak.

[Explanation of symbols]

 10,48 Tightening fittings 12 Dam plates 14,46 Projections and recesses 15,17 Vertical thicknesses and lateral thicknesses (supporting members) 16 Through holes 18 Rods 20 Joint bolts 22 Nuts 24 Supporting plates 25 Pressing means 32,50 Bending Department

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000001052 Kubota Co., Ltd. 2-47 Shikitsu Higashi, Naniwa-ku, Osaka City, Osaka Prefecture (71) Applicant 000001317 Kumagai Gumi Co., Ltd. 2-6 Chuo, Fukui City, Fukui Prefecture No. 8 (71) Applicant 000172813 Sato Industry Co., Ltd. 1-11 Sakuragicho, Toyama City, Toyama Prefecture (71) Applicant 000148346 Zentakagumi Co., Ltd. 2-2-11 Nishimotocho, Nishi-ku, Osaka City, Osaka Prefecture (72) Inventor Suzuki 2-17-3 Shibuya, Shibuya-ku, Tokyo Aoki Construction Technology Headquarters Research Laboratory (72) Inventor Yoshifumi Shirota 1-4-8 Kiheicho, Kodaira-shi, Tokyo Daiichi Nakamura Corp. 201 (72) Inventor Sueoka Waku, 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura-gumi, a stock company (72) Inventor Ikuo Sanuki 1-2-47, Shikazuhigashi, Naniwa-ku, Osaka-shi, Osaka (72) ) Inventor Masaaki Eguchi No. 2 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Co., Ltd. Tokyo headquarters (72) Inventor Koichi Sato No. 2 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Tokyo headquarters (72) Invention Person Yasuyuki Ishikawa 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Co., Ltd. Tokyo Head Office (72) Inventor Tadashi Matsuo 47-3 Mita, Atsugi, Kanagawa Prefecture Central Technology Research Institute (72) Inventor High ▲ Kuwa ▼ Tomoyuki 47-3 Mita, Atsugi, Kanagawa Prefecture Central Technology Research Institute, Sato Industry Co., Ltd. (72) Inventor Kenichi Terada 2222 Shinmachi, Ome-shi, Tokyo Inside Takatakagumi Institute of Technology

Claims (4)

[Claims] 1. A tightening metal for fixing a weir plate provided with a ridge and a through hole extending through the ridge to a support member forming a part of the supporting work, which is an opening provided with a screw hole. A rod having one end, a joint bolt having one end screwed into a screw hole of the rod and the other end received in the hole of the dam plate, and a nut screwed to the other end of the joint bolt. A supporting plate having elasticity and fixed to the nut, the supporting plate having a pair of bent portions sandwiching both side portions of the projection of the dam plate, and the other end portion of the rod to carry a reaction force. And a pressing means for pressing the support member toward the barrier plate. 2. A tightening metal member for fixing a dam plate having a groove and a through hole extending through the groove to a supporting member forming a part of the supporting work, the opening having a screw hole. A rod having one end, a joint bolt having one end screwed into a screw hole of the rod and the other end received in the hole of the dam plate, and a nut screwed to the other end of the joint bolt. A support plate having a pair of bent portions which is fixed to the nut and has elasticity and which is received by the recessed line of the dam plate and presses both side walls of the recess, and the other end of the rod. A fastening tool including a pressing means for pressing the support member toward the barrier plate while bearing a reaction force. 3. The supporting member is made of thick wood, and
The tightening hardware according to claim 1 or 2, wherein the pressing means includes a washer inserted into the other end of the rod and in contact with the thick end material, and a nut screwed to the other end of the rod. 4. The tightening hardware according to claim 3, further comprising a spring washer inserted through the other end of the rod and located between the washer and the nut.