JP5756930B1 - Spacer, spacer manufacturing method and slab rebar assembly method - Google Patents

Abstract

Provided is a spacer that can enhance stability and significantly reduce the possibility of rollover. A spacer 1 is a bar-type spacer that is used to secure a cover thickness when a so-called slab rebar is formed by assembling rebars in a lattice pattern during soil or slab construction. It is. The spacer 1 has a rod-shaped shaft portion 2 and a plurality of leg portions 3 that are connected to the shaft portion 2 and support the shaft portion 2, and the shaft portion 2 is bent. [Selection] Figure 1

Description

  The present invention relates to a spacer, a spacer manufacturing method, and a slab rebar assembling method that can be used to support a slab rebar assembled in a mesh shape so as to be separated from a lower mold.

  Conventionally, as spacers used for slabs, earthwork, etc., for example, a plurality of inverted U-shaped leg portions attached to a straight rod-like shaft portion is generally widely used ( For example, see Patent Document 1).

JP 2000-160769 A

As such a spacer, there is a problem that it is easy to roll over when a force from the vertical direction is applied to the shaft portion, and the usability is poor.

  The present invention has been made to solve such problems, and an object thereof is to provide an easy-to-use spacer, a spacer manufacturing method, and a slab reinforcing method.

In order to solve this problem, the spacer of the present invention is
A rod-shaped shaft,
A plurality of legs connected to the shaft and supporting the shaft;
The shaft portion is
When there is only one bent part, the length of one side is L1 and the length of the other side is L2 with the bent part as an end, the range of L1 and L2 is ± 20% To be within .

Thus, the spacer, as compared shaft portion and the straight conventional spacer, it is possible to improve the stability against the load from the multi-direction.

Further, the spacer manufacturing method of the present invention is a shaft portion of a spacer having a straight rod-shaped shaft portion and a plurality of legs connected to the shaft portion and supporting the shaft portion.
When the bent portion is an end, the length of one side is L1, and the length of the other side is L2, the shaft portion is positioned so that the bent portion is located within a range of ± 20% of L1 and L2. Bend only one part of.

Thereby, the spacer manufacturing method can manufacture the spacer which improved stability only by adding a simple process.

Furthermore, at the construction site, it has a rod-shaped shaft portion and a plurality of leg portions that are connected to the shaft portion and support the shaft portion, and the shaft portion has only one bent portion that is bent. , When the bent portion is an end, the length of one side is L1, and the length of the other side is L2, L1 and L2 are arranged within a range of ± 20% at predetermined intervals,
A slab rebar is assembled on the spacer.

  Thereby, in the slab reinforcing bar assembly method, since the spacer having improved stability can be used, the risk of the spacer rollover is small, and the work in the slab reinforcing bar assembly process can be simplified.

The present invention differs shaft portion and the straight conventional spacer, it is possible to improve the stability against the load from the multi-direction, thus the user of the easy-to-use spacers, a spacer manufacturing method and a slab rebar assembled implementation method it can.

According to the present invention, it is possible to manufacture a spacer with improved stability only by adding a simple process, and thus it is possible to realize a spacer manufacturing method that is convenient for the user.

  Since the present invention can use a spacer with improved stability, the risk of rollover of the spacer is small, the work in the slab rebar assembly process can be simplified, and thus a user-friendly slab rebar assembly method is provided. realizable.

It is a basic diagram which shows the structure of the spacer of this Embodiment. It is a basic diagram with which it uses for description of the angle of bending. It is an approximate line figure used for explanation of assembling of a slab reinforcing bar.

  Next, modes for carrying out the present invention will be described with reference to the drawings.

  1 in FIG. 1 indicates a spacer as a whole. The spacer 1 has a shaft portion 2 and five leg portions 3 connected to the shaft portion 2.

  As shown in FIG. 2, the shaft portion 2 is bent substantially at the center. “Substantially the center” means that L1 and L2 are within a range of ± 20%, where L1 is the length of one side with the bent portion as an end, and L2 is the length of the other side. Since the shaft portion 2 is bent substantially at the center, it can receive a force evenly when a load is applied, and it is difficult to roll over.

  Although there is no restriction | limiting in particular in the angle (alpha) of bending, It is preferable that it is 20 degrees-90 degrees (20 degrees or more and 90 degrees or less: Hereafter, it uses-with the same meaning). If the angle α is less than 20 °, the effect of being difficult to roll over is not sufficient, and if it exceeds 90 °, the range for receiving the slab reinforcing bar 99 of the spacer 1 becomes small. More preferably, it is 30 ° to 75 °. Note that the bending angle α is a bending angle of the shaft from a straight line state.

  There is no restriction | limiting in particular in the material of the axial part 2, A metal, a plastic, these combinations, etc. are used. Preferably, it is made of a rigid metal such as iron or an alloy. There is no restriction | limiting also in the diameter of the axial part 2, It designs so that the intensity | strength which can support the slab reinforcement 99 is maintained according to the used material.

  The leg part 3 (FIG. 1) has, for example, an inverted U-shape and plays a role of keeping the distance from the mounting surface to the shaft part 2 constant. When the leg part 3 is formed of a corrosive material such as iron, it is preferable that a rust prevention process is applied to the lower part thereof. Moreover, there is no restriction | limiting in the material of the leg part 3, It forms with a plastics, a metal material, and these combination. There is no limitation on the shape of the leg 3, and the strength capable of supporting the slab reinforcing bar 99 can be maintained depending on the material used, for example, inverted V shape, inverted Y shape, two plate shapes, block shape, etc. Designed as such.

  There is no restriction | limiting in particular in the manufacturing method of the spacer 1, A well-known method can be used. For example, a conventional spacer having a straight shaft portion may be bent, and the leg portion 3 may be attached to a previously bent shaft portion. Also, it can be formed integrally by injection molding or the like.

  The spacer 1 is used when the slab reinforcing bar 99 is assembled. A slab rebar 99 is assembled on the shaft portion 2 of the spacer 1 placed at a predetermined interval, and is used to secure a cover thickness from the concrete surface to the slab rebar 99 above a certain level.

By the way, Patent Document 2 describes a method of folding a reinforcing bar by stopping the reinforcing bars with a special fastener using rubber. That is, since the reinforcing bars (hereinafter referred to as reinforcing bar units) 90 assembled at the factory can be transported in a folded state, they can be installed only on site. In other words, the use of this method eliminates the need for reinforcing bars and shortens the work time, thereby reducing the construction cost.

Patent registration No. 4701443

As shown in FIG. 3, the spacers 1 are arranged in a state of being separated from each other. On top of that, the reinforcing bar unit 90 assembled in advance in a lattice shape is placed in an unfolded state.

  At this time, the spacer 1 is disposed so as to receive one reinforcing bar unit 90 by four or more spacers 1.

  Here, when mounting the reinforcing bar unit 90, the reinforcing bar unit 90 is mounted with a crane using a hanging tool. Since the reinforcing bar unit 90 has a large area, it is slightly inclined in the horizontal direction.

  When the reinforcing bar unit 90 is placed, it is difficult to control this inclination, and a large load is inevitably applied to one direction of the spacer 1.

  The conventional spacer having a straight shaft portion cannot withstand such a large load and sometimes rolls over. Every time the rollover occurred, the worker had to wake up the conventional spacer sequentially, and the work was complicated.

  In many cases, the reinforcing bar unit 90 is once placed on the spacer 1, and then the position of the reinforcing bar unit 90 is finely adjusted by shifting the reinforcing bar unit 90. The conventional spacer rolls over as soon as a force perpendicular to the shaft is applied, and each time it rolls over, the worker has to wake up the conventional spacer one after another, and the work is complicated.

  The spacer 1 of the present invention is stable regardless of the direction from which the load is applied. Even when the reinforcing bar unit 90 is placed, the spacer 1 does not roll over and the work of placing the reinforcing bar unit 90 is remarkably performed. It became possible to simplify.

  According to the above configuration, the spacer 1 has the rod-shaped shaft portion 2 and the plurality of legs 3 connected to the shaft portion 2 and supporting the shaft portion 2, and the shaft portion 2 is bent.

  Thereby, since the spacer 1 can increase stability, even if it is a case where a load is applied from which direction of a horizontal direction, usability can be improved, without rolling over.

The central portion of the shaft portion 2 of the spacer 1 is bent at an angle of 30 ° to 90 °. Thereby, the spacer 1 can receive the load of the orthogonal | vertical direction with respect to one side of the axial part 2 by another side, and can exhibit sufficient sense of stability.

  The shaft portion 2 in the spacer 1 is made of metal. Thereby, the spacer 1 can obtain sufficient strength to support the heavy slab reinforcing bar 99.

  A rebar unit 90 assembled in advance is deployed and placed on the spacer 1. Thereby, the stability which arises by bending with respect to the big load applied at the time of mounting the reinforcing bar unit 90 or positioning can fully be exhibited.

The spacer 1 is formed by bending a conventional spacer having a straight rod-shaped shaft portion and a plurality of legs connected to the shaft portion and supporting the shaft portion.

Thereby, the spacer 1 can use the manufacturing process of a conventional spacer as it is, and can be manufactured by a simple process.

The spacer 1 can be used when forming a slab rebar in the soil and slab construction. Soil is a floor where there is no space below, and slab reinforcement is mainly used to prevent cracks. The slab means a floor formed with a space underneath, and a slab reinforcing bar is used to maintain structural strength.

  In the slab reinforcing bar assembling method of the present invention, in the construction site, the spacers 1 having a bent rod-shaped shaft portion and a plurality of legs 3 connected to the shaft portion 2 and supporting the shaft portion 2 are arranged at predetermined intervals. The slab rebar 99 is assembled on the spacer 1.

  As a result, almost no rollover of the spacer 1 is required, so that the assembling process of the slab reinforcing bar 99 can be remarkably simplified.

  The slab reinforcing bar 99 is assembled on the spacer 1 by unfolding and mounting the reinforcing bar unit 90 assembled in advance and connecting the mounted reinforcing bar units 90 to each other.

  Thereby, in the slab reinforcing bar assembly method, the rollover of the spacer 1 is hardly caused, so that the reinforcing bar unit 90 is unfolded and placed, and the slab reinforcing bar 99 is simply connected by connecting the reinforcing bar units 90 to each other. It can assemble and the process of assembling the slab rebar 99 can be remarkably simplified.

  According to the above configuration, since the shaft portion 2 is bent in the spacer 1, the stability as the spacer can be improved and the rollover can be prevented, and the usability can be improved.

  In the above-described embodiment, the case where the shaft portion 2 is bent at only one place has been described. The present invention is not limited to this, and the same effect as in the present embodiment can be obtained even when a plurality of portions are bent. For example, the shaft portion 2 can be bent into a U shape, a U shape, or a Z shape.

  Furthermore, in the above-described embodiment, the case where the reinforcing bar unit 90 is placed on the spacer 1 has been described. The present invention is not limited to this. Even when the reinforcing bars are placed one by one on the spacer 1 and assembled in a mesh shape, the stability of the spacer 1 is improved and the risk of rollover is low. The difficulty level can be reduced, and the burden on the operator can be reduced.

  Moreover, in embodiment mentioned above, the case where the slab reinforcement 99 was assembled in the grid | lattice form was described. The present invention is not limited to this, and the configuration of the slab reinforcing bar 99 is not limited, and can be used when assembling the slab reinforcing bar 99 having various configurations on the spacer 1.

  Further, in the above-described embodiment, the case where the spacer 1 as the spacer is configured by the shaft portion 2 as the shaft portion and the leg portion 3 as the leg portion has been described. The present invention is not limited to this, and the spacer of the present invention may be configured by a shaft portion and a leg portion having various other configurations.

  The present invention can be applied to a spacer used under a slab reinforcing bar used in a construction site, for example.

1 ... Spacer, 2 ... Shaft, 3 ... Leg, 90 ... Slab rebar, 99 ... Rebar unit

Claims (8)

A spacer,
A rod-shaped shaft,
A plurality of legs connected to the shaft and supporting the shaft;
The shaft portion is
When there is only one bent part, the length of one side is L1 and the length of the other side is L2 with the bent part as an end, the range of L1 and L2 is ± 20% A spacer characterized by being inside . The spacer is
The spacer according to claim 1, wherein a bending angle of the shaft from a straight state is 30 to 75 ° . The shaft portion is
The spacer according to claim 2 , wherein a reinforcing bar unit assembled in advance is deployed and placed. The legs are
The spacer according to claim 3, wherein the spacer has an inverted U shape, an inverted V shape, an inverted Y shape, and two plate shapes . The spacer is
The spacer according to claim 4 , wherein the spacer is used when forming a floor as a soil or slab reinforcing bar. In the shaft portion of the spacer having a straight rod-shaped shaft portion and a plurality of legs connected to the shaft portion and supporting the shaft portion,
When the bent portion is an end, the length of one side is L1, and the length of the other side is L2, the shaft portion is positioned so that the bent portion is located within a range of ± 20% of L1 and L2. A spacer manufacturing method characterized by bending only one portion of the spacer. At the construction site,
It has a rod-shaped shaft portion and a plurality of legs connected to the shaft portion and supporting the shaft portion, and the shaft portion has only one bent portion that is bent, and the bent portion is the end. As a part, when the length of one side is L1, and the length of the other side is L2, the spacers in which L1 and L2 are within a range of ± 20% are arranged at a predetermined interval,
A method for assembling a slab reinforcing bar comprising assembling a slab reinforcing bar on the spacer. Unfold and place the pre-assembled rebar unit,
By connecting the rebar units placed above,
The slab reinforcing bar is assembled on the spacer. The spacer according to claim 7 .

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