JPH07111082B2 - Spacer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for holding a member embedded in concrete in an appropriate position when pouring concrete.

[0002]

2. Description of the Related Art The inventors of the present invention previously mentioned Japanese Patent Application No. 3-1751.
In the No. 55 application, an intersection binding support 20 for a PC plate sheath as shown in FIG. 2 was proposed. The intersection binding supporter 20 of this PC plate sheath is a post tension type prestressed concrete plate such as a large PC pavement plate that uses mechanical force to apply a large number of intersections of the sheaths 30 and 31 arranged in a grid pattern. It is automatically bound from above. This PC
The intersection bundling support 20 of the plate sheaths 30 and 31 is made of a steel plate or the like, has a horizontal bottom plate 21 and a vertical leg 22, and has a sheath 3
It also serves as a spacer to secure the concrete cover on the lower surface of 1.

FIG. 4 shows a partial sectional view of the end portion 11 of the PC paving slab 10. The PC pavement plate 10 has a thick end portion 11, and the intersection binding support 20 of the PC plate sheath causes uneven gaps h1, h2, h3, h4, and h5 with the ground. Further, as shown in FIG. 5, when there is unevenness in the lower ground of the PC plate 10, gaps h6, h7, etc. occur. Therefore, these uneven gaps h1, h2, h3, h
4, h5, h6, h7 must be supplemented with spacers.

Conventionally, a mortar spacer 12 as shown in FIG. 6 has been used in such a case. The spacer 12 is a rectangular parallelepiped whose dimensions a ₁ , a ₂ and a ₃ are different from each other, and the spacer 12 can correspond to the gaps a ₁ , a ₂ and a ₃ depending on how it is placed. However, if the gap is different from this size, it is not suitable and does not have a sufficient function as a spacer, or other means must be used together to completely fill the gap. Further, the spacers 12 must be bound together by using the binding wires 13 embedded in the respective surfaces of the spacers in order to prevent the movement occurring during the pouring of concrete.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spacer that solves such problems. In particular, when a post-tensioning prestressed concrete slab is placed in a vast area such as the above-mentioned PC paving slab, an intersection tie support of PC sheath that binds the intersections of many longitudinal and transverse sheaths by mechanical force is placed on the ground. In the process of placing and pouring PC plate concrete,
An object of the present invention is to make it possible to quickly install a spacer by matching the heights in gaps having different dimensions. Further, in this case, it is also a problem to eliminate the trouble of binding the wires one by one using a binding wire as in the conventional case.

[0006]

SUMMARY OF THE INVENTION The present invention is a horizontal bottom plate and
The height of the sheath tie support with vertical legs that stand up from it
A spacer for adjusting the height, which has a substantially rectangular parallelepiped shape as a whole and has a multi-step spacer for supporting the horizontal bottom plate.
The vertical leg having a lid and an opening in the same direction as the slit.
And a mounting portion that is locked to the spacer.
Is.

[0007]

Since the spacer of the present invention has a multiplicity of slits, if the bottom plate of a support having a thin bottom plate is inserted into this slit, even if the size of the gap between the bottom plate and the ground varies, It is a spacer that can immediately adapt to the gap size. Further, the slit is a slit for supporting the bottom plate of the sheath binding support having a horizontal bottom plate and a vertical leg, and by providing a mounting portion for locking the vertical leg at the top, it can be mounted in one operation, There is no need for the work of binding with a binding wire or the like. Therefore, the PC
It is extremely useful as an auxiliary spacer for a number of cross-tie binding supports for plate sheaths.

[0008]

EXAMPLE FIG. 1 shows a spacer 1 according to an example of the present invention. The spacer 1 is formed by stamping a thin steel plate into a predetermined shape and bending it. The entire shape is a hollow body having a substantially rectangular parallelepiped shape. A large number of slits 3 parallel to the bottom surface 2 are provided. The slits 3 are formed in a comb shape, and the teeth 4 between the slits have a stepped shape such that the length of the teeth located at the upper side is short and becomes longer toward the lower side. The portion is chamfered 5 so that the plate can be easily inserted into the slit at an arbitrary height position. Further, the spacer 1 of the embodiment is provided with a mounting portion 6 on the upper surface for engaging with a vertical member. In the embodiment, the mounting portion 6 has an opening 7 in the same direction as the slit 3 and is externally fitted to the vertical member and provided with a stopper 8 so that the external fitting does not come off once the vertical member is locked. .

The bottom plate 21 and the vertical leg 22 of the intersection binding support 20 of the PC plate sheath shown in FIG.
As shown in FIG. 3, the bottom plate 21 is
The bottom plate 21 is inserted into a slit corresponding to a gap of arbitrary size between the ground and the ground. Accordingly, the spacer 1 supports a bottom plate 21 can be mounted in one motion <br/> operation on the ground, collected
The attachment part 6 is locked to the vertical leg 22 and does not come off even when placing concrete. Unlike conventional mortar block spacers, there is no need to bind them with binding wires.

[0010]

The spacer of the present invention can be easily attached to a height corresponding to the height of the gap between the bottom plate of the intersection binding support of the PC plate sheath and the ground. . It was, but I, can attach quickly taken a large number of the spacer to the necessary height, shortening the construction period of the entire PC version reclamation construction, high efficiency, greatly contributes to cost reduction. Further, this spacer can be manufactured in large quantities at a low cost from a steel plate by pressing.

[Brief description of drawings]

FIG. 1 is a perspective view of a spacer according to an embodiment.

2 is a perspective view of a PC version sheath intersection binding supporting lifting member.

FIG. 3 is a perspective view showing a state immediately before attachment of the spacer of the embodiment.

FIG. 4 is an end cross-sectional view of a PC paving slab.

FIG. 5 is an end cross-sectional view of a PC paving slab.

FIG. 6 is a perspective view of a conventional mortar spacer.

[Explanation of symbols]

 1 spacer 2 bottom surface 3 slit 4 tooth 5 chamfer 6 mounting portion 7 opening 8 retaining stopper 10 PC paving plate 11 end portion 12 conventional spacer 13 binding wire 20 intersection point binding support for PC plate 21 bottom plate 22 vertical leg 30, 31 sheath

Claims (1)

[Claims] 1. A horizontal bottom plate and a vertical leg rising from the horizontal bottom plate.
It is a spacer for adjusting the height of the sheath bundling support
Te, the spacer is overall shape is a substantially rectangular parallelepiped shape, wherein
A large number of slits for supporting the horizontal bottom plate, and the slits
A mounting portion having an opening in the same direction and locked to the vertical leg is provided.
A spacer characterized by the fact that it has been obtained .