JPS6124483B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a formwork device for making a concrete pavement slab that constructs a concrete paved road by sequentially arranging a plurality of molds side by side in a continuous manner. The flat plate-shaped elastic members forming the elastic expansion joints are bridged between the opposing formworks by embedding them at appropriate intervals in the longitudinal direction and through the plate thickness direction. The present invention relates to a formwork device for making concrete pavement slabs that is constructed by passing and supporting.

As mentioned above, in concrete paved roads constructed by installing many concrete pavement slabs in parallel,
In order to prevent damage such as cracks in the pavement slab due to thermal expansion and thermal contraction stress caused by seasonal fluctuations,
Generally, elastic expansion joints are formed at required intervals in the longitudinal direction to absorb and alleviate thermal expansion and contraction stress.

In order to construct such a concrete pavement road with elastic expansion joints, conventionally, each pavement slab is made to have a length corresponding to the required interval for forming elastic expansion joints, and when these pavement slabs are installed side by side, the adjacent pavement slabs are A method was adopted in which a flat plate-like elastic member was interposed between each part to form elastic joints, but when this method was used, the length of the unit paving slab was equal to the required interval for forming elastic expansion joints. Because of this, the efficiency is extremely low when constructing long structures such as paved roads, especially on-site, and it takes a lot of time to insert plate-like elastic members one by one. There was a drawback that it required a lot of work.

In view of the above circumstances, an object of the present invention is to provide a formwork device that can efficiently and accurately produce concrete pavement slabs with elastic expansion joints.

In order to achieve the above object, the present invention provides a formwork device for making concrete pavement slabs, which is described in detail at the beginning, and includes a pair of joint members that can be locked and fixed to the formwork, respectively. The member is integrally connected with a pair of clamping members that protrude inwardly from each mold and can clamp and secure the elastic member from both sides in the thickness direction when the member is locked and fixed to each of the molds. At the same time, both ends in the longitudinal direction of the shape-retaining member disposed along both sides in the thickness direction of the elastic member over the entire width or substantially the entire width thereof are fitted and fixed to each pair of clamping members. It is characterized by the structure in which a possible part is formed.

When using the formwork apparatus according to the present invention having the above-mentioned characteristic structure, a pair of joint members are locked and fixed to each of the opposing formworks, and each pair of clamping members integrally connected to these joint members are connected to each other. Both ends of a flat plate-shaped elastic member for forming elastic expansion joints in the width direction are clamped and fixed from both sides in the thickness direction, and shape-retaining members are arranged along both sides of the flat plate-shaped elastic member in the thickness direction. By pouring concrete in an assembled state in which both longitudinal ends are fitted and fixed to the fitting portions of each of the clamping members, the concrete is placed at multiple locations at appropriate intervals in the longitudinal direction of the slab at the same time as the paving slab is created. Since flat plate-shaped elastic members can be embedded and fixed, it is possible to create pavement slabs with a unit length equivalent to multiple times the required interval for forming elastic expansion joints, and in which elastic expansion joints are reliably formed at the required intervals. It can be created by one-time concrete pouring.

Therefore, especially in the case of on-site construction, compared to the conventional means described above, construction efficiency can be significantly improved and construction costs can be reduced accordingly.

Furthermore, the above-mentioned flat plate-like elastic member, which is easily bent and deformed when subjected to concrete pressure, is inserted through a shape-retaining member arranged along both sides in the thickness direction over its entire width or substantially its entire width. Since it can be firmly supported and fixed, it is possible to reliably prevent bending and deformation of the flat plate-shaped elastic member due to the pressure of poured concrete, and it is possible to form the desired elastic expansion joint with high accuracy.

Furthermore, since the shape-retaining member is fitted and fixed to the clamping member on the joint member side, generally speaking, the concrete pouring surface extends up to the vertical edge of the clamping member, so after concrete is poured, the joint is fixed. Since it can be unfixed and removed from the component side and used for the next paving slab creation, there is less material loss for the entire device compared to the case where the shape retaining component is integrated with the joint component. It can be used economically as it requires less amount. In addition, since this shape-retaining member is separate from the joint member,
You can cut it to the required length depending on the width of the pavement slab to be created, or you can prepare shape-retaining members of multiple lengths in advance and select the required length from among them. Therefore, joint members having the same specifications can be used in common for creating pavement slabs with a plurality of width dimensions.

Hereinafter, embodiments of the present invention will be described based on the drawings. A long concrete pavement slab A is formed by forming elastic expansion joints B penetrating in the thickness direction of the slab at appropriate intervals in the longitudinal direction. It is a formwork device for creating a joint B, which can be locked and fixed at both upper and lower ends of the formworks 2, 2 that face each other in the longitudinal direction of the joint B, and at each location corresponding to the planned position for creating the joint B. A pair of joint members 3, 3 are provided, and each of the joint members 3, 3 protrudes toward the inside of the molds 2, 2 when the joint members 3, 3 are locked and fixed to the molds 2, 2. Joint B
A pair of clamping members 4, 4, 4, 4 which can clamp and fix the flat plate-shaped elastic member 1 forming the elastic member 1 from both sides in the thickness direction are integrally provided, and
These holding members 4, 4, 4, 4 are provided with holding members 5, 5, 5 each having an L-shaped cross section and disposed along both sides of the elastic member 1 in the thickness direction over the entire width or substantially the entire width thereof. , 5 are formed into substantially U-shaped portions 4a, 4a, 4a, 4a which can be fitted and fixed at both ends in the longitudinal direction.

The joint member 3 includes a locking piece 3a that can be locked to the outer surface of the formwork 2 by bending one end of a rectangular metal plate 6 so that it contacts the upper and lower end surfaces of the formwork 2. At the same time, the elastic piece 3 is formed by punching out a portion near both ends in the width direction at the intermediate portion in the longitudinal direction of the metal plate 6 so as to come into elastic contact with the inner surface of the formwork 2.
b, 3b, and the fitting and fixing portions 4a, 4 pairs of clamping members 4, 4a divide the portion of the metal plate 6 protruding inward from the formwork 2 into two in the width direction; Each of the two halves is bent so that the cross-sectional shape is approximately J-shaped, and the opposing pieces are vertically oriented, and the taller opposing piece is provided with a hole 4b for inserting the shape-retaining member 5 fixing bolt 7. It is constructed by forming a plurality of pieces at appropriate intervals in the inside and outside directions of the mold.

Next, to explain the procedure for making the concrete pavement version A, the joint members 3, 3 are fixedly attached to the predetermined locations of the formworks 2, 2, and both end portions of the elastic member 1 are held by the holding members 4, 4. After clamping and fixing, and fitting and fixing the shape-retaining members 5, 5 to the clamping members 4, 4, the concrete is placed facing each other with the vertical edges of the clamping members 4, 4 at the upper and lower levels. Cast between formwork 2 and 2.

After the poured concrete has hardened, the bolts 7, 7 are removed, the shape retaining members 5, 5 are taken out from the clamping members 4, 4 of the joint members 3, 3, the formworks 2, 2 are dismantled, and , joint member 3 firmly stuck to the poured concrete surface,
3 to separate from the concrete surface. The joint members 3, 3 separated in this way are often deformed and cannot be used for other purposes, but if the deformation is small, they can be used as is or after the deformation is repaired.

In addition, at both ends in the thickness direction of the concrete pavement version A created as described above, both upper and lower end portions of the plate-shaped elastic member 1 buried in the concrete are
The joint members 3, 3 are protruded by a width approximately equal to the vertical width of the holding members 4, 4.
Among these, the protruding part at the upper end should be cut and removed so that it is flush or approximately flush with the concrete surface, or
Or embed it in the asphalt layer that covers the concrete surface while leaving it in a protruding state. On the other hand, leave the protruding part at the bottom as it is, and
Embedded in the soil below or paving version A for elevated roads
In this case, it is best to leave it as it is, as it will not obstruct traffic in any way even if it is left protruding.

[Brief explanation of the drawing]

The drawings show an embodiment of the formwork device for making concrete pavement slabs according to the present invention. Figure 1 is a partially cutaway perspective view of a concrete pavement slab, Figure 2 is a vertical front view, and Figure 3 is a main part of the concrete pavement slab. FIG. 4 is an enlarged longitudinal sectional front view, FIG. 4 is an enlarged plan view of essential parts, and FIG. 5 is a sectional view taken along line V-V in FIG. 3. A...Long concrete plate, B...Elastic expansion joint,
DESCRIPTION OF SYMBOLS 1... Flat plate-shaped elastic member, 2... Opposing formwork, 3... Joint member, 4... Clamping member, 5... Shape-retaining member, 4
a...Fitting and fixing part.

Claims (1)

[Claims] 1 Flat plate-shaped elastic members 1 that form elastic expansion joints B by embedding them in a long concrete slab A at appropriate intervals in the longitudinal direction and penetrating through the slab thickness direction. This is a formwork device for making a concrete paving slab, which is constructed by supporting and spanning between opposing formworks 2, 2, and a pair of joint members 3 that can be locked and fixed to the formworks 2, 2, respectively. , 3 are provided, and these joint members 3,
3 includes a pair of members that protrude inwardly from each of the molds 2, 2 when locked and fixed to each of the molds 2, 2, and are capable of clamping and fixing the elastic member 1 from both sides in the thickness direction thereof; The clamping members 4, 4, 4, 4 are integrally provided, and each pair of clamping members 4, 4, 4, 4 has a portion extending along both sides of the elastic member 1 in the thickness direction. Portions 4a, 4a, 4a, 4 that can be fitted and fixed at both longitudinal ends of the shape-retaining members 5, 5, 5, 5 arranged over the width or substantially the entire width
A formwork device for making concrete pavement slabs, characterized in that a.