JP4022170B2 - Metal fittings for reinforcing bars and separators - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting metal fitting of a reinforcing bar and a separator used when building a concrete structure.
[0002]
[Prior art]
The separator for concrete formwork is for positioning the concrete formwork forming the concrete placement space, and generally, the parallel concrete formwork arranged so as to sandwich the concrete placement space is connected. Used for. However, when a concrete placement space with a very wide width such as a bridge is required, preparing a long separator that can cross this wide concrete placement space is not only costly but also easy to handle. Not easy. In such a case, the reinforcing bars arranged along the width direction in the concrete placement space are used as a part of the separator. At this time, in order to connect the reinforcing bars and the separator having a normal length, Connecting brackets are required.
[0003]
Although this type of conventional connecting bracket cannot show patent documents, it is of a type in which a reinforcing bar and a separator along the same are tightened and connected with a clamp bracket. Slippage may occur, and it was difficult to obtain sufficient bond strength.
[0004]
[Means for Solving the Problems]
An object of the present invention is to provide a connecting metal fitting between a reinforcing bar and a separator that can solve the above-described conventional problems, and the means thereof is shown with reference numerals of embodiments to be described later. And a U-shaped main body 1 and a fastening bolt 2. The main body 1 includes a pair of left and right reinforcing bar receiving portions 7 and 8 formed by cutting from the front edges of the left and right side plates 3 and 4, respectively, At least two types of screw holes 9 and 11 having different screw specifications for screwing the screw shaft portions 14a and 15a of the separators 14 and 15 in a direction parallel to the reinforcing bars 13 supported by the pair of reinforcing bar receiving portions 7 and 8 are provided. The fastening bolt 2 is threaded through a vertical through screw hole 6 provided in the top plate portion 5 of the main body 1 so that the reinforcing bar 13 is moved to the pair of left and right reinforcing bar receiving portions 7 and 8. It is configured to be pressed and fixed.
[0005]
When the present invention having the above-described configuration is implemented, the two types of screw holes 9 and 11 can be provided separately on the left and right side plates 3 and 4 of the main body. In this case, the two types of screw holes 9 and 11 may be provided concentrically with each other, but the two types of screw holes 9 and 11 are provided with their positions shifted from each other and are concentric with the screw holes 9 and 11. It is desirable to provide the through holes 10 and 12 for insertion of the separators 14 and 15 screwed into the screw holes 9 and 11 in the side plates 3 and 4 on the other side.
[0006]
The screw holes 9 and 11 and the through holes 10 and 12 are vertically moved at positions shifted rearward with respect to the positions of the fastening bolt 2 and the reinforcing bar receiving portions 7 and 8 in a side view of the main body 1. Can be arranged. Furthermore, the screw holes 9 and 11 and the through holes 10 and 12 can be configured as burring holes provided with cylindrical walls 9a to 12a projecting outward.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a U-shaped body, and 2 is a fastening bolt. The main body 1 is provided with a through screw hole 6 in the vertical direction composed of a burring hole provided with a cylindrical wall 6a projecting outward at a position near the front end of the top plate portion 5 connecting the left and right side plates 3 and 4. The fastening bolt 2 is screwed through the through screw hole 6.
[0008]
The left and right side plates 3, 4 of the main body 1 are provided with a pair of left and right reinforcing bar receiving portions 7, 8 formed by cutting from the front edge thereof so as to be located on both the right and left sides directly below the fastening bolt 2. Further, one side plate 3 of the main body 1 has a separator coupling screw hole 9 having a diameter of 2/5 mm (W5 / 16) formed of a burring hole provided with a cylindrical wall 9a protruding outward. A cylindrical wall 10a is provided at a rear lower position with respect to the positions of the receiving portions 7 and 8 and protrudes outwardly above the screw hole 9 and above the reinforcing bar receiving portions 7 and 8. A through-hole 10 through which a three-minute (W3 / 8) diameter separator composed of burring holes is inserted is provided, and the other side plate 4 of the main body 1 is concentric with the through-hole 10 and outward. A cylinder coupling screw hole 11 having a three-minute (W3 / 8) diameter formed by a burring hole provided with a protruding cylindrical wall 11a is provided, and is a concentric with the screw hole 9 and protrudes outward. 2 / 5mm composed of burring holes with wall 12a Through holes 12 are provided W5 / 16) diameter separator may be inserted.
[0009]
As shown in FIG. 2, the connection fitting having the above-described configuration is configured such that the pair of left and right reinforcing bar receiving portions 7 and 8 of the main body 1 are fitted at appropriate positions near the end of the reinforcing bar 13 along the width direction of the concrete placing space. By tightening the fastening bolt 2 in the state, the reinforcing bar 13 is pressed toward the pair of left and right reinforcing bar receiving portions 7 and 8 by the fastening bolt 2, and the main body 1 is stably fixed to the reinforcing bar 13 in a three-point support state. Can do. Thus, when the separator for positioning the concrete formwork on the outer end side is a large-diameter separator 14 having an inner end screw shaft portion 14a having a three-divided diameter, as shown in FIG. A small-diameter separator 15 in which the inner end screw shaft portion 14a is screwed and connected to the screw hole 11 directly or through the through hole 10 depending on the mounting direction, and the separator has an inner end screw shaft portion 15a having a diameter of 2/5. In some cases, the inner end screw shaft portion 14 a can be screwed and connected to the screw hole 9 directly or via the through hole 12 according to the mounting direction of the main body 1. Of course, the position of the separator 14 or 15 can be adjusted in the circumferential direction of the reinforcing bar 13 by rotating the main body 1 around the reinforcing bar 13.
[0010]
In the embodiment described above, the screw hole 9 having a diameter of 2/5 and a diameter of 5 and the screw hole 11 having a diameter of 3/4 are provided. Of course, the screw standard is not limited to two types, and may be three types or more. Basically, a plurality of types of screw holes (for example, screw holes 9 and 11) are provided in one side plate 3 or 4 and, if necessary, the other side plate 4 or 3 is concentric with each screw hole. It is also possible to provide a through-hole for inserting a separator (for example, through-holes 10 and 12).
[0011]
Furthermore, as shown in FIG. 3, two types of screw holes 9 and 11 of the screw standard can be concentrically provided on the left and right side plates 3 and 4 of the main body 1. In this case, only when the small-diameter separator 15 can be inserted into the screw hole 11 for the large-diameter separator 14, the small-diameter separator 15 is screwed into the main body 1 using the screw holes 9 from either the left or right side of the main body 1. The large-diameter separator 14 can be screwed and connected to the main body 1 only from the side where the screw hole 11 is provided.
[0012]
【The invention's effect】
The present invention can be implemented and used as described above, and according to the connecting metal fitting of the reinforcing bar and the separator according to the present invention, it is arranged in the width direction of a wide concrete placing space. The concrete formwork can be easily and easily connected to the reinforcing bars through the separator, and the assembly cost of the concrete formwork can be reduced compared to the case where a long separator must be used. In particular, according to the configuration of the present invention, the main body can be firmly fixed to the reinforcing bar in a three-point support state by using a fastening bolt, and the separator is connected to the main body by a screw shaft included in the separator. Because it is due to the screw connection that uses the part, the separator can be firmly bonded to the rebar as a whole, and a highly safe concrete formwork It can be assembled. In addition, since the body is provided with at least two types of separator coupling screw holes having different screw standards, at least two types of separators having different screw standards (thicknesses) can be used, and versatility is high.
[0013]
In addition, according to the structure of Claim 2, compared with the case where two types of screw holes are provided only on one side of the left and right side plates of the main body, the strength balance of the main body side plates is good and safety is improved. In this case, according to the configuration of the third aspect, even when any of the two types of separators having different screw standards is used, the conditions are almost the same in terms of strength, and both of the two types of separators having different screw standards are used. Can be used safely.
[0014]
Furthermore, according to the structure of Claim 4, even when using any of two types of separators with different screw standards, these separators can be screw-coupled from either the left or right side of the main body, and the main body is attached to the reinforcing bar. When attaching, it is not necessary to consider the direction of attachment of the main body, and it can be used easily and efficiently. In this case, according to the structure of Claim 5, the whole main body can be comprised with sufficient balance in strength. Furthermore, according to the structure of Claim 6, the strength fall of the main body by many hole processing can be suppressed.
[Brief description of the drawings]
FIG. 1A is a side view, FIG. 1B is a front view, and FIG. 1C is a plan view.
FIG. 2A is a longitudinal front view at a reinforcing bar position showing a use state, FIG. 2B is a longitudinal side view thereof, and FIG. 2C is a longitudinal front view at the separator position;
FIG. 3 is a longitudinal front view of a main part showing a modification.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 U-shaped main body 2 Fastening bolts 3, 4 Left and right side plates 5 Main body top plate portion 6 Through screw holes 7, 8 Reinforcing bar receiving portions 9, 11 Separator coupling screw holes 10, 12 Separator insertion through holes 9a to 12a Cylindrical wall 13 Reinforcing bars 14, 15 Separator 14a, 15a Screw shaft portion of separator

Claims (6)

It consists of a U-shaped main body and a fastening bolt, and the main body includes a pair of left and right reinforcing bar receiving portions formed by cutting from the front edges of the left and right side plates, and a reinforcing bar supported by the pair of left and right reinforcing bar receiving portions. There are provided at least two types of screw holes with different screw specifications for screwing the screw shafts of the separator in parallel directions, and the fastening bolts are through screw holes in the vertical direction provided in the top plate part of the main body. A connecting fitting of a reinforcing bar and a separator, which is screwed and penetrated to press and fix the reinforcing bar to the pair of left and right reinforcing bar receiving portions. The rebar / separator fitting according to claim 1, wherein the two types of screw holes are provided separately on the left and right side plates of the main body. The connecting bracket of the reinforcing bar and the separator according to claim 2, wherein the two types of screw holes are provided concentrically with each other. The two types of screw holes are displaced from each other, and a through-hole for insertion of a separator concentrically with each screw hole and screwed into the screw hole is provided in a mating side plate. Metal fittings for reinforcing bars and separators. 5. The reinforcing bar according to claim 4, wherein the screw holes and the through holes are vertically arranged at positions shifted rearward with respect to a position where the fastening bolt and the reinforcing bar receiving part are located in a side view of the main body. Connecting bracket with separator. The said screw hole and each through-hole are the metal fittings of the reinforcing bar and separator of Claim 4 or 5 comprised by the burring hole provided with the cylindrical wall which protrudes outside.

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