JPH0136570Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forming form for a concrete block, particularly a geta-shaped concrete block for civil engineering, which has a plurality of parallel retaining parts on the back side of a rectangular surface part.

Civil engineering blocks (commonly known as machi blocks), which are made up of a ``face'' and ``stacks'', are mainly used for bank protection, retaining walls, etc., and can only be lifted by one worker, but recently the dimensions of the ``face'' have increased. Large blocks with sides of 1 m or more have also come to be used. The clog-shaped block mentioned above is also an example.

The cast molding mold for this geta-shaped block has its "face" formed by the bottom plate, and both sides and end faces are
It was formed using side plates and end plates, but there was the trouble of having to add a separate template for the part between the ``holds'', which corresponds to the teeth of the geta. This was a problem in terms of efficiency and dimensional accuracy, and this idea solved this problem.

Next, the configuration and implementation of this invention will be explained with reference to the drawings.

Figures 1 to 3 show an example of a large concrete block. Two parallel retaining parts 2 are attached to the back side of the rectangular surface part 1. On both end faces of the surface portion 1, protrusions 3 and grooves 4 are provided which engage with adjacent blocks. Since the two retaining parts 2 have heads 2a that are slightly bulged, there is a problem in that during demolding, the template gets caught on the heads 2a and cannot be pulled straight up.

Examples of the formwork of this invention are shown in FIGS. 4-6. First, an outline of the invention will be described with reference to this embodiment.
The bottom plate 10 is made up of side plates 11, 11 and end plates 12, 12 attached to the four sides of the bottom plate 10 so as to be openable and closable.
This is a bent plate that forms the back surface 1b and side surface 1c of the side portion following this, and both side end plates 12, 12 are planar plates having substantially the same shape as both end surfaces 5, 5 of the concrete block, and each of one or both of them is A core bottom plate 13 for a U-shaped groove is fixed from the bottom of the concave part 12a between the retaining parts 2 and 2 so as to be horizontal during mold assembly, and a core bottom plate 13 is rotatable on both edges of the core bottom plate 13, respectively. Both core side plates 13a, 13a attached and both core side plates 1
3a, 13a are pressed and fixed so that their edges contact the inner edges of the central concave portion 12a of the end plate 12, and a tension loosening mechanism 14 is provided for loosening when demolding the product. be.

Since the end face 5 of this block (the end face side of the retaining portion 2) is a flat surface, the end plate 12 can be a flat plate having the same shape as the end face. Therefore, a template (core) for forming the space between the retaining parts 2, 2 was fixed to the end plate 12.
As a result, by simply opening and closing the side plates 11, 11 and both end plates 12, 12 attached to the four sides of the bottom plate 10 via a hinge mechanism, the core is automatically positioned and opened. This formwork has become desirable in terms of efficiency and dimensional accuracy.

First, the bottom plate 10 is a steel plate having the same shape as the block surface 1 shown in FIG. 2, and is placed flat on the floor.

The side plate 11 is bent uniformly across its entire width, and its lower end is attached to the bottom plate 10 with a hinge mechanism 15, as shown in FIG.
At the upper end is a collar plate 1 that serves as the collar for the concrete input port C.
6 by the width thereof, and a handle 17 to be gripped when opening and closing is attached. When making a mold, bottom plate 10 and side plate 1
Needless to say, the concrete is designed not to leak from between the holes.

As described above, the end plate 12 is a flat plate having the same shape as the end face of the block, and is attached to the bottom plate 10 via the hinge mechanism 15, and has the flange plate 16a of the concrete input port C attached to the upper end. Even though it is called a flat plate, the protrusions 3 and grooves 4 shown in Fig. 3 are made at the joint ends of the block end faces 5, so the formwork end plate 12 also has a cross section as shown in Fig. 6. It has protrusions 23 and grooves 24.

Now, the central concave portion 12a of this flat end plate 12
A core bottom plate 13 protrudes from the bottom at a right angle (horizontally when assembling) into the formwork. In this example, core bottom plates 13, 13 facing inward from both end plates 12, 12, respectively, butt against each other at the center of the formwork. The butt line 18 is shown in FIGS. 5 and 6. Note that a core bottom plate 13 that reaches the opposite end plate 12 may be attached only to the end plate 12 on one side, but since it is long, it becomes difficult to open it by hand when demolding.

The core bottom plate 13 is attached to the end plate 12 shown by the chain line in FIG.
It is easy to see that the core side plates 13a are attached to both edges of the core bottom plate 13 via hinge mechanisms 15. A flange plate 16b for a concrete inlet is also attached to the upper end of this core side plate 13a. The core side plates 13a, 13a on both sides are connected by the tension loosening mechanism 14, and when the handle 14a is pulled up, the fifth
If you move it inward as shown by the chain line in the figure and then pull it further outward, the end plate 12 as well as the end plate 12 will be completely opened as shown by the chain line in FIG.

The side plate 11 can also be opened completely by grasping its handle 17 and opening it outward as shown by the chain lines in FIGS. 4 and 5. Therefore, the hardened concrete product is lifted out using a crane.

Next, the formwork tightening mechanism will also be explained in the order in which the formwork is assembled. First, when the open end plate 12 with the core is raised vertically as shown by the chain line in FIG. 6, the core bottom plates 13, 13 on both sides are brought together at the butt line 18, as shown by the solid line in the figure.
When the handle 14a is pushed in, the core side plate 13a is also brought to the molding position by the tension action of the tension loosening mechanism 14 (see FIGS. 4 and 5).

Therefore, when the latch 20 of the tightening clamp 19 attached to the upper surface of the core bottom plate 13 on one side is hooked to the bracket 21 attached to the other side core bottom plate 13 and the clamp handle 22 is pushed down, the core bottom plates 13 on both sides and the core The side plates 13a are fastened together watertight.

Then, when the both side plates 11, 11 are raised, both edges thereof touch both edges of the end plates 12, 12, and the upper end flange plate 16 abuts against the edge of the flange plate 16a of the end plate. Since the flange plate 16b of the core side plate is already in contact with the opposite end of the end plate flange plate 16a, the flange plates on the four sides surrounding the concrete input port C are aligned. Therefore, a tightening mechanism is attached to both ends of the collar plate 16 and each end of the two connected collar plates 16b, in this case, the handle 26 of the toggle lamp 25.
Press down to finish molding. In addition, four collar plates 16, 16a, surrounding the concrete input port C,
16a and 16b have positioning engagement plate pieces 27 and 28 attached to their respective ends to correct the relative position.

Although one embodiment has been described above, it goes without saying that this invention should be modified and applied as appropriate according to the implementation conditions using the well-known techniques of the designer without changing its gist.

This idea was developed to mold between the multiple retaining parts of a geta-shaped block that is 1 m or more on a side, so the core and its support are separately molded from the bottom plate, side plates, and end plates that form the outside as in the past. Rather than providing a mechanism, a core was built into the end plate.

When the end plate is placed in the molding position, the core also arrives at the molding position at the same time, increasing efficiency and dimensional accuracy, and the equipment is cylindrical. The upper end of the retaining part of the block bulges out, so the core cannot be pulled out upwards, but since the core is divided into a bottom plate and side plates so that they can be bent, it can be squeezed and pulled out when demolding. For this reason, the core side plates on both sides are connected by a tensile loosening mechanism, so they are tensioned during mold assembly, and when removed from the mold, they are loosened and pulled outward to release the end plates as well. As a result, core shrinking work and end plate opening work can be done at once without changing the handle. And when assembling the mold, the work of raising the end plates and the work of pushing the core into the molding position can be done all at once.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are an elevation view, a bottom view, and a side view of an example of a concrete block targeted by this idea.
Figure 4 is an elevational view of an embodiment of this invention (X in Figure 5).
-X cross section), Figure 5 is its plan view, Figure 6 is the
It is a YY cross-sectional view of the figure. 10... Bottom plate, 11... Side plate, 12... End plate.

Claims (1)

[Scope of Claim for Utility Model Registration] A molding form for a geta-shaped concrete block for civil engineering, which has a plurality of parallel retaining parts on the back side of a rectangular surface part, which includes a bottom plate forming the surface of the surface part, and opening and closing on the four sides of this bottom plate. It consists of side plates and end plates attached on both sides, and the side plates on both sides are bent plates that form the outer surfaces of the retaining part on both outsides, and the back and sides of the side parts that follow, and the end plates on both sides A flat plate having substantially the same shape as both end faces, from the bottom of the concave part between each retaining part of one or both of them, toward the inside of the formwork,
The core bottom plate for the U-shaped groove is fixed horizontally during mold assembly, the core side plates on both sides are rotatably attached to both edges of this core bottom plate, and the edges of these core side plates are A formwork for forming a concrete block, characterized in that it is equipped with a tension loosening mechanism that presses and fixes the end plate so as to touch the inner edge of the concave part and loosens it when the product is demolded.