JPH0244965Y2 - - Google Patents

Description

[Detailed description of the invention] - Industrial application field - This invention relates to formwork for block forming used to construct retaining walls to protect terrace slopes, and is particularly applicable to the corners of slopes. This invention relates to a mold for forming corner blocks.

-Prior art- It is widely practiced to construct a retaining wall to protect the slope of a terrace using an L-shaped concrete block 30 having an inclined front plate 29 as shown in FIG. However, when constructing a retaining wall using such L-shaped concrete blocks 30, a problem arises as to how to handle the corners of the slope. Conventionally, as shown in FIG. 8, an L-shaped block 30 facing the corner was used.
The corner portion of the retaining wall was constructed by cutting the abutting portion 31 diagonally to match the corner angle of the corner portion, and abutting and connecting both cut surfaces 32.

-Problems to be solved by the invention- However, with this method, it is difficult to firmly connect the abutting parts 31 of the blocks, and the corners of the terraces are particularly susceptible to large earth pressures. However, there was a contradiction in that the corners of the constructed retaining walls were the weakest in strength, and there were also problems with durability.

Also, in order to solve this problem, it would be sufficient to mold the block 30 facing the corner into one piece.
There are various types of retaining walls with different heights and wall thicknesses, and the corner angle α of the corner of the terrace also varies, so if you actually try to mold the corner blocks into one piece, , it is necessary to manufacture a special formwork for each corner, and forming with a simple wooden formwork is actually done, but the construction period becomes long and the construction cost increases. There was a problem.

This invention was made to solve the above problem, and its purpose is to provide a formwork for forming an integral concrete block to be used at the corner of a retaining wall that protects a slope.

-Means for solving the problem- The following will be explained using the symbols attached to the drawings.
The formwork of the present invention has a center post 2 erected on a base 1, two inner forming frames 3 rotatably and fixedly arranged around the center post 2, and further has a frame plate 19. An outer forming frame 4 is fixedly arranged on a base at a predetermined distance from each of the inner forming frames 3, and a connecting member is inserted into a slit 26 formed between the two outer forming frames. 5, 5a, and 5b, an L-shaped edge plate 6 is fixed to the end 3b of each inner forming frame, and a cover plate 7 is constructed to cover the two inner forming frames. This is provided with an end plate 8 that stands upright facing the center post 2.

-Function- When the opening angle of the outer forming frame 4, especially the outer forming frame 4 having the inclined frame plate 19, is changed, the shape of the slit 26 formed between the two forming frames 4 changes. Therefore, changing the corner angle α of the block 25 to be molded involves rotating the inner forming frame 3 around the center post 2, changing the opening angle of the outer forming frame 4 opposing this, and connecting members corresponding to this opening angle. 5,
This is done by replacing 5a and 5b.
Changing the height H and wall thickness D of the molded block is as follows:
This is done by replacing the edge plate 6 and the end plate 8, as well as replacing the bottom frame 15 and the core rod 16 for forming the drain hole, which are interposed between the inner and outer molding frames.

-Example- Fig. 1 and Fig. 2 are views showing an embodiment of the formwork according to the present invention, and Fig. 1 is a perspective view showing a cover plate 7 and an end plate 8 integrated therewith separated from each other. , FIG. 2 is a side view with one edge plate 6 removed.
In Figures 1 and 2, 1 is the base of the formwork, 2 is the cylindrical center post erected on the base 1, 3 is the inner forming frame, and 4 is the frame plate 19 tilted so as to expand upward. 5 is a connecting member, 6 is an L-shaped edge plate, 7 is a cover plate, and 8 is an end plate integrally formed by bending the cover plate 7.

The inner forming frame 3 has a cylindrical recess formed at one end 3a that closely contacts the circumferential surface of the center post 2, and is fixed to the center post 2 with a bolt 10 inserted into a circumferential long hole 9 provided in the recess. . The outer molding frame 4 is
A wedge-shaped slit 2 formed between both forming frames 4
They are mutually connected by a connecting member 5 fitted into the connecting member 6. A large number of bolt holes are provided on the upper surface of the base 1, and an inner molding frame 3 and an outer molding frame 4 are provided.
is mounted and fixed on the base 1 by clamping its leg portions 13 and 14 with bolts 12 using a fixture 11 as shown in FIG. Between the inner molding frame 3 and the outer molding frame 4, a bottom frame 15 and a core rod 16 for forming drain holes as shown in FIG. 2 are fixed by through bolts 17.
5 and the core rod 16 form the frame plate 18 of the inner forming frame.
and the frame plate 19 of the outer surface forming frame is defined.

This interval defines the wall thickness D of the vertical wall portion of the L-shaped block to be molded (see FIG. 4), and the height H of the molded block is determined by the height of the bottom frame 15. Ru.

The edge plate 6 has a shape that corresponds to the cross-sectional shape of the block to be molded, and the edge plate 6 has a shape that corresponds to the cross-sectional shape of the block to be molded.
It is fixed with bolts etc. The cover plate 7 is
It is a pentagonal plate material, and has a conical end 21 at the top thereof that comes into close contact with the top chamfered part 20 of the center post, and the bottom part thereof is bent upward to form an end plate 8 integrally. This cover plate 7 is arranged between the forming frames 3 so as to cover the open part 23 between the inner forming frames 3 with the conical end 21 in close contact with the center post 2 and both ends 8a of the end plate 8 in close contact with the edge plate 6. It is placed and fixed on.

The center post 2, the bottom frame 15, the inner molded frame 3, the outer molded frame 4, the connecting member 5, the edge plate 6, the cover plate 7, and the end plate 8 form a space 24 that is L-shaped in cross section and approximately L-shaped in plan.
After this is formed, concrete is poured into the void from above the formwork to form the block. The shape of the molded block 25 is shown in FIG. Here, a is the surface formed by the center post 2, b is the surface formed by the bottom frame 15, c is the surface formed by the inner forming frame 3, d is the surface formed by the outer forming frame 4, and e is the surface formed by the outer forming frame 4. f is a surface formed by the connecting member 5, f is a surface formed by the edge plate 6, g is a surface formed by the cover plate 7, h is a surface formed by the end plate 8, and i is a surface formed by the core rod 16. This is a drainage hole formed by.

In Fig. 5, the inner forming frame 3 is rotated around the center post 2 from the state shown in Fig. 1, and the opening angle of the outer forming frame 4 is also narrowed accordingly. The molding frame 3 and base 1 are omitted. When the opening angle of the outer forming frame 4 having the inclined frame plate 19 is changed, the shape of the slit 26 between the forming frames also changes. Therefore, the connecting member 5a is changed to correspond to the changed shape, and the outer forming frames 4 are newly connected to each other.

FIG. 6 shows another example of the connecting member. If the corner angle α of the block is made smaller, the ridge at the tip becomes more likely to be damaged. It is designed to connect.

-Effects of the invention- As described above, according to the formwork of the present invention, not only can the corner blocks of retaining walls with different corner angles be easily formed integrally using the same formwork, but also blocks with different cross-sectional shapes can be formed into one piece. This can be easily dealt with by replacing the bottom frame and other attached parts, so L-shaped corner blocks of various shapes with different corner angles and cross-sectional shapes can be molded using the same mold. Corner blocks corresponding to blocks with inclined surfaces can also be easily formed. Therefore,
When constructing a retaining wall using L-shaped blocks, the complexity and expense of having to manufacture a special formwork for each different corner angle of the slope of the terrace is solved. Since the retaining wall at the corner can be constructed as a single block, it is possible to construct a retaining wall that looks good and has sufficient strength and durability.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a perspective view of the formwork showing the lid plate and the end plate integrated therewith separated from each other, and Figure 2 is a perspective view of one side of the formwork. 3 is a perspective view illustrating a fixture for fixing the inner and outer forming frames on the base, and FIG. 4 is a side view of the formwork with the edge plate removed. FIG. FIG. 5 is a perspective view showing the state in which the connecting member is fitted when the corner angle of the outer molding frame is narrowed; FIG. 6 is a perspective view showing the state in which the connecting member having a chamfered portion is fitted into the slit; FIG. 7 is a perspective view showing an L-shaped concrete block for a retaining wall, and FIG. 8 is a plan view schematically showing a conventional corner construction method. In the figure, 1: base, 2: center post, 3: inner molding frame, 4: outer molding frame, 5, 5a, 5b: connecting member, 6: edge plate, 7: cover plate, 8: end plate, 15 :
Bottom frame, 16: Core rod, 25: Molded block.

Claims (1)

[Scope of utility model registration request] Two inner molding frames installed on the base so as to be able to slide around the center post installed on the base, rotate around the center post, and fix, and spaced apart from each of the inner molding frames by a predetermined distance. 2 to be fixed on the base
a connecting member fitted into a slit formed between the outer forming frames; and an L-shaped edge plate fixed to the end of each inner forming frame opposite to the center post. , a mold for forming a corner block of an L-shaped retaining wall, comprising a cover plate constructed to cover two inner forming frames, and an end plate erected on the cover plate facing the center post. frame.