JP2010037796A - Joint bar with construction joint lath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in a construction joint method of conventional technology which requires partition plates formed with reinforcement insertion holes in positions corresponding to reinforcements to be arranged, requires the partition plates adapted to the size of a column, a beam or the like to be jointed, requires to bore the reinforcement insertion holes adjusted to the positions of arranged reinforcements, and further requires a large number of partition plates. <P>SOLUTION: A joint bar with a construction joint lath is formed by embedding a lath end 3, along a longitudinal direction, in a concrete bar 1 of suitable length with a quadrangular cross section of square, rectangular or trapezoidal shape formed of concrete not lower in strength than placed concrete so that the embedded end 3 of the lath 2 is in the embedded state so as not to project from the concrete bar 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, when building a reinforced concrete structure, it is necessary to transfer primary concrete and secondary concrete. At the time of this joining, if concrete is placed and then joined, a lath is provided on the concrete stop or the like. The present invention relates to a joint rod with a joining lath that has been developed to eliminate the difficulty in processing the ends of the lath.

Conventionally, as shown in FIG. 5, as a method of joining primary concrete and secondary concrete, a joint rod is fixed to a formwork, and a lath is applied to the joint rod in a concrete placement direction side with respect to a reinforcing bar. There is a splicing method that attaches so that the reinforcing bars also touch the joint rods in the same way.
As shown in FIG. 6, as a method of joining primary concrete and secondary concrete, a joint rod is fixed to a mold, and a lath is placed about 10 mm from the joint rod in the concrete placement direction side with respect to the reinforcing bar. There is a splicing method in which the lath is attached with a clearance (the reinforcing bar is also attached approximately 10 mm away from the joint rod).
In addition, as shown in FIG. 7, as a method of joining primary concrete and secondary concrete, a mold is provided, and a lath is spaced about 10 mm from the mold in the concrete placement direction side with respect to the reinforcing bar. There is a joining method to attach.
In addition, it is a concrete jointing method for joining concrete with a vertical joint surface in reinforced concrete construction, which is made of a metal plate or a high-strength resin plate, and has a shape and size corresponding to the vertical joint surface of the concrete, or the vertical of the concrete. Reinforcing bar insertion hole is formed at a position corresponding to the reinforcing bar to be laid, and has a shape and dimensions that include the joining surface, and a shearing force between the concrete that is placed in contact with the surface on each of both sides A partition plate formed with projections or irregularities that can transmit the wire, and the partition plate is positioned at a position where the vertical joint surface is formed, and a reinforcing bar is inserted into the reinforcing bar insertion hole of the partition plate. Assemble the rebar, insert the formwork, place the pre-cast concrete so that it touches one side of the partition plate, and then touch the other side of the partition plate Chi concrete and Da設 a concrete joint method performs dismantling of the mold after curing of the concrete (e.g., see Patent Document 1) exists.
JP 2006-193985 A (refer to the claims section, detailed description section of the invention, and FIGS. 1 to 8)

However, in the joining method shown in FIG. 5, there is a possibility that the lath end and the like may be exposed after the mold is disassembled, and this exposure causes a problem that rust is generated at the end of the lath.
The joining method shown in FIGS. 6 and 7 has a problem that it is very difficult to adjust the gap between the joint rod or the mold and the lath to about 10 mm although the lath end is not exposed.
Further, in the joining method shown in FIGS. 5 and 6, after the joint rod remains after dismantling, it is necessary to repair the corresponding concave portion after the joint rod with mortar or the like. In particular, in the case of the joining method shown in FIG. 5, there is a problem that embedding mortar is a difficult operation because it also serves to cover the end of the lath.
In addition, in the conventional joining method shown in Patent Document 1, a partition plate in which a reinforcing bar insertion hole is formed at a position corresponding to the reinforcing bar to be arranged is necessary, and this partition plate is used for connecting columns, beams, and the like. It must be adapted to the size, and a rebar insertion hole that matches the position of the bar arrangement must be drilled. There is also a problem that a large number of partition plates are required.

A first invention of the present invention for solving the above-described problems is a joint rod with a lath for joining as described in claim 1 and is as follows.
With respect to the cast concrete, the lath end portion was buried along the longitudinal direction in a concrete rod having a square cross section having an appropriate length made of concrete having a strength equal to or greater than that of the square, rectangle, trapezoid, etc. It is the structure which embeds and forms in the state embedded so that the edge part of a lath might not protrude from a concrete stick.

A second invention of the present invention for solving the above-mentioned problems is a joint rod with a lath for joining as described in claim 2, and is as follows.
In addition to the invention described in claim 1, the lath embedded in the concrete rod is formed through a reinforcing metal fitting.

Since the joint rod with splicing lath of the present invention has the configuration as described above, the following effects can be obtained.
(1) The troublesome adjustment work of providing an appropriate gap at the end of the lath with respect to the formwork or joint rod is unnecessary.
(2) It is not necessary to repair the concave part remaining after the joint rod after dismantling with mortar or the like.
(3) Prepare a number of lengths that do not become heavy, and adjust to the required length by using two to several pieces according to the length to be used. There is no need to prepare.
(4) When transporting, storing, etc., the concrete bars are placed side by side so that the laths are stacked side by side. Cost can be kept down.

  With respect to the cast concrete, the lath end portion was buried along the longitudinal direction in a concrete rod having a square cross section having an appropriate length made of concrete having an equal strength or more, such as a square, a rectangle, a trapezoid, and the like. This is a joint rod with a splicing lath formed by embedding the lath so that the end of the lath does not protrude from the concrete rod.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an overall perspective view showing an example of a joint rod with a lath for joining according to the present invention, FIG. 2 is a front view showing an example of a joint rod with a lath for joining according to the present invention, and FIG. FIG. 4 is a side view showing a use state in which jointing is performed using a jointing lath with a joining lath as an example, and FIG. 4 shows joining using a jointing rod with joining lath which is an embodiment of the present invention. FIG. 5 is a schematic explanatory view showing a conventional first example, (A) is a plan view, (B) is a front view, and FIG. 6 is a schematic explanatory view showing a second conventional example. (A) is a plan view, (B) is a front view, FIG. 7 is a schematic explanatory view showing a third conventional example, (A) is a plan view, and (B) is a front view.

First, the features of the joint rod with a lath for joining according to the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the present invention.
Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the present invention, when building a reinforced concrete building, it is necessary to transfer the primary concrete and the secondary concrete in the reinforced concrete work.
In order to reduce the cost of this splicing, it is used for concrete fastening by forming it with a lath net, but the one using a conventional lath is fixed to the formwork as in the prior art shown in FIG. It is easiest to place the lath against the joint rod, but the lath is exposed after the formwork is disassembled, so it is necessary to embed mortar as a treatment for this exposed part. is there.
The prior art shown in FIG. 6 is similar to the prior art shown in FIG. 5 in addition to the fact that it is very difficult to work so as to provide a gap of about 10 mm between the end of the lath and the joint rod. When the mold is disassembled, the joint rod is also fixed to the mold frame, so that a recess corresponding to the joint rod is formed. Therefore, it is necessary to repair the recess with a mortar or the like.
Similarly to the prior art shown in FIG. 6, the prior art shown in FIG. 7 must be arranged while adjusting the gap between the lath and the mold to about 10 mm, which makes the operation difficult.

On the other hand, the joint rod with a lath for joining according to the present invention has a cross-section of a square, a rectangle, a trapezoid, etc., when manufacturing a concrete rod having a square shape such as a square. This is a joint rod with a lath for joining, in which one end is embedded so as not to protrude from the top.
It should be noted that the lath is embedded in a concrete bar having a square cross section, but it is also possible to fold or fold the end of the lath to increase the strength and to also serve as a retaining stopper. It would be better to attach a reinforcing metal fitting to and embed it in a concrete bar having a square cross section.
The material of the concrete rod is required to adopt a material (concrete) equal to or higher than the strength of the concrete to be placed.

Next, the concrete joining method will be described with reference to FIGS.
When a new secondary concrete is handed over to an existing primary concrete, a main bar, a reinforcing bar and a reinforcing bar are installed on the side where the primary concrete is to be handed over, and a concrete having a substantially rectangular cross section on the side in which the reinforcing bar is placed. The lath embedded in the longitudinal direction of the rod is arranged, and the end of the lath is embedded in the concrete rod, so after disassembling the formwork, the lath is also put together with the concrete rod by the placed concrete The end of the lath that is integrated and embedded in the concrete rod does not protrude, and no recess is left after dismantling of the joint rod fixed to the conventional formwork, so that repair by mortar or the like is unnecessary.
In order to match the length and height, and in order to improve workability, considering the weight, prepare a concrete bar with a square cross section, 120 cm and 180 cm including the length of the lath. And connect them so that they match the length and height.
In the above description, the lengths are 120 cm and 180 cm, but it is needless to say that appropriate length types can be prepared.
In addition, it is sufficient that the width of the lath is about 10 cm to 20 cm, and the width of the lath that is actually required is embedded in the lath of the joint rod with a joining lath whose one end is embedded in a concrete rod having a square cross section. Since the width of the protruding lath on the opposite side is about 10 cm to 20 cm as described above, it is necessary to bind the protruding end and the end of the prepared lath body or to overlap the ends. The lath is arranged so as to have a wide width.

  It can be used for joining a required place where a splicing lath is used, for example, a pillar-to-pillar, a pillar-to-beam, a beam-to-beam or the like.

It is a whole perspective view which shows an example of the joint rod with the lath for joining of this invention. It is a front view which shows an example of the joint rod with the lath for splicing of this invention. It is a side view which shows the use condition which performs jointing using the joint rod with the lath for joining which is one Example of this invention. It is a front view which shows the use condition which performs joining using the joint rod with the lath for joining which is one Example of this invention. It is a schematic explanatory drawing which shows the conventional 1st example, (A) is a top view, (B) is a front view. It is a schematic explanatory drawing which shows the conventional 2nd example, (A) is a top view, (B) is a front view. It is a schematic explanatory drawing which shows the conventional 3rd example, (A) is a top view, (B) is a front view.

Explanation of symbols

1 .... Concrete rod 2 .... Las 3 .... Las end 4 .... Form 5 ... Reinforcing bar

Claims (2)

With respect to the cast concrete, the lath end portion was buried along the longitudinal direction in a concrete rod having a square cross section having an appropriate length made of concrete having an equal strength or more, such as a square, a rectangle, a trapezoid, and the like. A joint rod with a lath for splicing, which is formed by embedding the end of the lath so that it does not protrude from the concrete rod. The joint rod with a lath for splicing according to claim 1, wherein the lath is embedded in a concrete rod through a reinforcing metal fitting.

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