JPH0622055Y2 - Construction joint structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a construction joint structure for construction, which is used by constructing a concrete structure at each joint on each floor.

[Conventional technology and problems]

Conventionally, when constructing a concrete formwork on the upper floor in constructing a concrete structure, the separator is supported from the slab formwork on the lower floor to attach a form such as a wall, and
A well-known joint bar is often attached to the formwork at the splicing point by nailing.

Therefore, when placing concrete on the upper floor, there is a step on the concrete outer surface of the splicing point, which is not desirable for the appearance of the building, and there are problems such as shadowing along the step and being unsightly. is there.

[Means for Solving the Problems]

The construction joint structure for construction of the present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is to dispose the concrete anchor portion at the joint bar position of the concrete joint portion and to raise the upper floor at that location. By supporting and constructing the concrete formwork, the outer surface of concrete is flattened at the splicing point and the quality of the appearance is improved, and a practically reasonable and effective construction joint structure is provided. It is in.

As means for achieving the purpose, while providing through holes for the mounting shaft leg at required intervals of joint rods to be constructed in concrete joints, and arranging concrete anchor portions on the back side of the joint rods, and One end of the mounting shaft leg is screwed into the concrete anchor portion, and the other end is supported by a concrete formwork through a joint bar.

[Action]

The construction joint structure for construction of the present invention has a joint bar to be installed along the required position inside the formwork on the lower floor at the joint point of the concrete structure, and the mounting shaft leg is screwed to the concrete anchor portion on the back side. Insert and temporarily fix from the outside of the formwork.

In this state, the formwork on the lower floor is assembled and concrete is placed. After curing, the formwork is disassembled to leave the joint bar on the concrete surface.

Next, the concrete formwork on the upper floor can be mounted by a separator from the slab formwork on the lower floor or a shaft leg from the joint bar, and then concrete can be placed.

For this reason, it is possible to prevent the formwork from being damaged at the concrete splicing point, solve the above-mentioned conventional problems, and achieve the above-mentioned object.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of a construction joint structure for construction according to the present invention.

Reference numeral 1 is a joint bar having insertion holes 1a for mounting shaft legs at required intervals, and 2 is a concrete fixing portion 2a formed by bending the rear end into a V shape and a female screw hole 2b is formed at the front end. The concrete anchor portion is provided with a rustproof receiving piece 2c on the front end face.

Reference numeral 3 is a mounting shaft leg provided with male screws 3a and 3b at both ends.

Next, an example of use of the construction joint structure for construction of the first embodiment will be described with reference to FIGS. 2 and 3.

FIG. 2 shows the case of constructing the lower floor, in which the wall formwork P ₁ has the separator S screwed into the support A attached to the slab formwork P ₂ and one end of which is passed through the wall formwork P _1. Attach to the tightening bracket with F.

Further, the joint bar 1 is installed horizontally at the jointing portion, the concrete anchor portion 2 is arranged on the back surface of the joint rod 1, the shaft leg 3 is passed through the insertion hole 1a of the joint rod 1, and one end thereof is connected to the concrete anchor portion 2. The other end is connected to the nut B via the wall form P _1.
Etc.

In this state, concrete is poured and cured.

After dismantling the lower floor formwork, the upper floor wall formwork P ₁ is supported by the separator-S from the slab or the shaft leg 3 of the joint bar 1 of the joint as described above, Concrete is placed between the frames.

When the wall formwork on the lower floor is dismantled, the joint bar of the joint is not taken out and is left on the concrete side. Therefore, the shaft leg 3 and the insertion hole 1a of the joint bar 1 are inserted. It is necessary for the fitting to be in a proper press-fit state.

After disassembling the wall formwork P ₁ on the upper floor, the shaft leg 3 is removed, the joint rod 1 is removed, and then caulking treatment is performed in the hole of the receiving piece 2c of the concrete anchor portion 2 with mortar or the like. .

Further, the joint rod may be provided with a shaft leg insertion hole at required intervals at a construction site or the like.

Next, another embodiment of the construction joint structure for construction of the present invention will be described.

FIG. 4 is a partial vertical cross-sectional view showing a configuration in which the rear end portion of the concrete anchor portion 22 is appropriately swelled and the fixing head portion 22a is formed, and FIG. While the protruding fixing head 32a is provided and the male screw portion 32b is provided at the front end, the receiving piece 32c is provided.
With the female screw hole 32d provided along the axis of
2c concrete anchor part 32 and shaft leg 33
The form which connects is shown.

According to the second and third embodiments described above, in addition to the actions and effects expected of the first embodiment, the structure is simple and can be easily implemented, which is economically advantageous.

[Effect of device]

As described in detail above, according to the present invention, when constructing a concrete structure, in particular, the wall formwork at the connecting portion between the lower floor and the upper floor is reliably supported, and the wall formwork of the lower floor is Even when dismantled, there is no protrusion of the joint bar at the splicing point, especially because the lower part of the wall formwork on the upper floor is supported securely and firmly, so it is sufficient against the lateral pressure when placing concrete on the upper floor. Strength is obtained.

Therefore, it is possible to obtain a practicable joint joint structure that is practically useful, such as that the appearance accuracy of the outer surface of concrete is high and a structure of excellent quality is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the construction joint structure for construction of the present invention, FIGS. 2 and 3 are longitudinal sectional views showing a usage state of the first embodiment, and FIG. 4 is a second view. A sectional view of the essential part of the embodiment,
FIG. 5 is a sectional view of the essential parts of the third embodiment. 1 …… Joint bar 2,22,32 …… Concrete anchor part 3 …… －Axle leg P ₁ … Wall formwork

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A through hole for a mounting shaft leg is provided at a required distance between joint rods to be installed on a concrete joint, and a concrete anchor portion is provided on the back side of the joint rod. A construction joint structure for construction, wherein one end of the mounting shaft leg is screwed into the portion and the other end is supported by a concrete formwork through a joint rod.