JP2014020120A - Anchor bar, and slab joining structure employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency while reducing burdens on workers, to improve construction quality and further to reduce construction costs.SOLUTION: A slab joining structure comprises: an insert member 20 which is embedded into a beam member or a post member; and an anchor bar 10 which is mounted to the insert member 20 for supporting a half precast concrete plate 30. The insert member 20 includes: a female screw part 21 for threading in one end portion of the anchor bar 10. In the anchor bar 10, a male screw part 11 to be threaded into the female screw part 21 is provided in one end portion thereof, and an engage part (e.g., a nut part 12 or a groove part 112) to be engaged to a fastening machine tool (e.g., a wrench or a driver) is provided in another end portion.

Description

  The present invention relates to an anchor bar and a slab joint structure using the same, for example, a slab joint structure using a half precast concrete plate and an anchor bar used therefor.

  Currently, half PCa (precast concrete) plate manufactured at the factory is placed as a combined formwork at the site, the upper end is placed on the upper surface, and concrete is driven in and integrated into the building to build a composite slab. The precast method is popular.

  In such a half precast method, field work is complicated, and various techniques have been proposed in order to reduce the burden on the field worker and increase the efficiency of construction (for example, see Patent Document 1). . The half pre-precast slab described in Patent Document 1 (utility model registration No. 30417754) is a projecting damming means for blocking the flow of cast-in-place concrete on a half precast plate.

Utility Model Registration No. 3041754

  By the way, in the slab joining structure using a half precast concrete board, it is necessary to fix a slab lower end reinforcement to the pillar member, beam member, etc. which consist of full precast concrete, for example. At this time, in order to install the reinforcing bars at a predetermined interval with respect to the pillars and beams, etc., by embedding the insert member in advance in the pillars and beams, etc., and screwing the reinforcing bars subjected to male thread processing at the tip portion into the insert member, It is common to fix the bottom slab of a slab to a column or beam. Such a work is a manual work by a field worker, and when the number of differential bars is large, there is a problem that not only the burden on the worker is large, but the work efficiency is poor.

  The present invention has been proposed in view of the above-described circumstances. For example, when constructing a slab joint structure using a half precast concrete plate, the burden on the worker is reduced and work efficiency is improved. An object of the present invention is to provide an anchor bar and a slab joint structure using the anchor bar that can improve the cost and further reduce the construction cost.

  The anchor muscle of the present invention and the slab joint structure using the same have the following characteristics in order to achieve the above-described object. That is, the anchor bar of the present invention is provided with a male screw part to be screwed into a female screw part provided in the insert member at one end part and engaged with a tightening tool (for example, a wrench or a driver) at the other end part. It is characterized in that a joint is provided.

  Further, the slab joint structure using the anchor bars of the present invention is a slab joint structure using a half precast concrete board, and is attached to the insert member embedded in the beam member or the column member, and the half precast. An anchor bar for supporting the concrete plate is provided. In addition, the insert member can be applied not only to a beam member or a column member embedded in advance, but also to a post-inserted insert member. That is, the slab joint structure using the anchor bar of the present invention is applied to the combination of the insert member embedded in the beam member or the column member and the anchor bar, and simply connects the reinforcing bar and the other member. Is different.

  The insert member used for this slab joining structure is provided with a female screw portion for screwing one end portion of the anchor muscle. Further, the anchor bar is provided with a male screw part for screwing into the female screw part of the insert member at one end part, and an engaging part for engaging with a tightening tool (for example, a wrench or a driver) at the other end part. Provided.

  The anchor bar having the above-described configuration and the slab joint structure using the anchor bar have a structure in which when the male screw part provided at one end (tip part) of the anchor bar is screwed into the female screw part of the insert member, A tightening tool (for example, a wrench or a driver) is engaged with an engagement portion (for example, a nut portion or an engagement groove of a driver) provided at the other end (head). Then, by rotating the anchor bar using a tightening tool (for example, a wrench or a driver), the male screw part is screwed into the female screw part, and the anchor bar is fixed to the insert member.

  According to the anchor bar and the slab joint structure using the same according to the present invention, an engagement part (for example, a nut part or an engagement groove of a driver) that engages with a tightening tool (for example, a wrench or a driver) on the head of the anchor bar. ) Is provided. For this reason, when attaching an anchor bar to an insert member embedded in a beam member or a column member, a tightening tool (for example, a wrench or a driver) that matches an engaging portion (for example, a nut portion or an engaging groove of a driver) Since the anchor muscle can be rotated using the operator, the burden on the worker can be reduced and the working efficiency can be improved as compared with the case where the worker rotates the anchor muscle with the fingertip.

  In particular, by using an impact wrench or impact driver as a tightening tool, by rotating the anchor bar and screwing the tip of the anchor bar into the insert member, it is possible to further reduce the burden on the worker and improve the work efficiency. At the same time, the construction cost can be reduced.

The perspective view of the anchor muscle which concerns on Example 1 of this invention, and the schematic diagram of an engaging part. The perspective view of the anchor muscle which concerns on Example 2 of this invention, and the schematic diagram of an engaging part. The perspective view of the insert member used for the slab joining structure using the anchor reinforcement which concerns on embodiment of this invention. The schematic diagram of the slab joining structure using the anchor reinforcement which concerns on embodiment of this invention.

  Hereinafter, with reference to drawings, an embodiment of an anchor bar of the present invention and a slab joint structure using the same will be described. 1 to 4 show an anchor bar and a slab joint structure using the anchor bar according to an embodiment of the present invention, and FIGS. 1A and 2A are perspective views showing the structure of the anchor bar. 1 (b) and 2 (b) are schematic views showing the shape of the engaging portion, FIG. 3 is a perspective view of the insert member, and FIG. 4 is a schematic view of the slab joint structure.

<Outline of anchor muscle and slab joint structure>
The anchor bar and the slab joint structure using the anchor bar according to the embodiment of the present invention are preferably used for a slab joint structure using a half precast concrete plate, and particularly, an impact wrench, an impact driver, etc. By using the tightening tool, the anchor muscle can be reliably fixed to the insert member with an appropriate torque.

<Anchor Muscle / Example 1>
As shown in FIGS. 1 (a) and 1 (b), the anchor muscle 10 of the first embodiment is provided with a male screw portion 11 at one end (tip) and an engaging portion at the other end (head). The nut part 12 which functions as is provided. The male screw portion 11 can be formed, for example, by rolling or cutting, and the nut portion 12 can be formed, for example, by rolling or welding. The length of the male screw portion 11 is substantially matched to the length of the female screw portion 21 of the insert member 20.

<Anchor muscle / Example 2>
As shown in FIGS. 2 (a) and 2 (b), the anchor muscle 110 of the second embodiment is provided with a male threaded portion 111 at one end (tip) and an engaging portion at the other end (head). The groove portion 112 functioning as is provided. Similar to the first embodiment, the male screw portion 111 can be formed by rolling or cutting, for example, and the groove portion 112 can be formed by cutting, for example. Further, the length of the male screw portion 111 is substantially matched with the length of the female screw portion 21 of the insert member 20.

  Note that the groove 112 may be a minus groove suitable for a minus driver, or a plus groove suitable for a plus driver. Furthermore, you may combine the nut part 12 of Example 1, and the groove part 112 of Example 2. FIG.

<Insert member>
As shown in FIG. 3, the insert member 20 is a member that is used by being embedded in a beam member or a column member when constructing a slab joint structure, and includes a female screw portion 21 for screwing one end portion of the anchor muscle 10. ing. Note that the shape of the insert member 20 is not limited to that shown in FIG. 3, and the base member (the end opposite to the open end of the female screw portion 21) is bifurcated. A structure that can be firmly fixed is preferable.

<Tightening tool>
The tightening tool used in the present invention includes, for example, a wrench or a driver. Furthermore, the wrench is preferably an impact wrench, and the driver is preferably an impact driver. This reduces the burden on the worker and improves the work efficiency.

  The impact wrench and the impact driver are configured to rotate the hammer member while rotating the rotary member with an electric motor or compressed air. Moreover, a socket and a driver can be attached to the tip of the rotating shaft of the hammer member. When the hammer member rotates, an impact is applied to the rotating shaft, and the socket or driver attached to the tip of the rotating shaft rotates. Since the rotating shaft to which the socket and driver are attached rotates while receiving an impact, a large torque can be applied and the applied torque is constant.

<Slab joint structure>
As shown in FIG. 4, the slab joint structure according to the embodiment of the present invention embeds an insert member 20 in a beam member or a column member, and anchor bars 10 (lower ends) that support the half precast concrete plate 30 in the insert member 20. It has a structure with a streak) attached.

  In order to attach the anchor bar 10 to the insert member 20, the male thread part 11 of the anchor bar 10 is matched with the female thread part 21 of the insert member 20, and the engaging part of the anchor bar 10 (the nut part in the example shown in FIG. 4). 12) The socket 41 (wrench part or driver part) of the tightening tool 40 (impact wrench or impact driver) is engaged with 12). In this state, by rotating the socket 41 in the tightening direction, the male thread portion 11 of the anchor bar 10 is screwed into the female thread part 21 of the insert member 20, and the anchor bar 10 is fixed to the beam member or the column member. Can do.

<Other embodiments>
In the embodiment described above, the engaging portion is the nut portion 12 or the groove portion 112 in terms of easy processing with respect to the reinforcing bar, but if the shape engages with a wrench, screwdriver or other tightening tool, You may provide the engaging part of another shape.

DESCRIPTION OF SYMBOLS 10 Anchor reinforcement 11 Male thread part 12 Nut part 20 Insert member 21 Female thread part 30 Half precast concrete board 40 Tightening tool 41 Socket 110 Anchor reinforcement 111 Male thread part 112 Groove part

Claims (2)

  An anchor bar characterized in that a male screw part for screwing into a female screw part provided in an insert member is provided at one end part, and an engaging part engaging with a tightening tool is provided at the other end part. It is a slab joint structure using half precast concrete board,
An insert member embedded in a beam member or a column member, and the like, and an anchor bar attached to the insert member and supporting the half precast concrete plate,
The insert member is provided with a female screw portion for screwing one end portion of the anchor muscle,
The anchor bar is provided with a male screw part for screwing into the female screw part at one end thereof, and an engaging part for engaging with a tightening tool at the other end part. Construction.

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