JPS6030017Y2 - concrete formwork equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a concrete formwork device, and its main purpose is to use it for pouring and forming concrete manholes, but it can also be used for forming various types of concrete. It is a formwork device that is divided into left and right sections, which allows a single worker to open and close large concrete frames, which are extremely heavy, with a single touch without requiring much force. It's what I did.

Concrete formwork used for pouring and forming concrete products is sometimes divided into parts for taking out the product during molding, but even so, in the case of large formworks, the weight of the divided formwork itself is very heavy, making it difficult to handle it. This requires several workers and a considerable amount of physical effort.

The same is true for the concrete formwork used to form manholes; even though the formwork is divided into parts, it is pulled upwards when cutting, and since manholes are very large, The frame is also very heavy, so
Conventionally, the opening and closing of the formwork required a worker of at least 2 Å or more, and had the disadvantage of being quite time-consuming.

This invention was proposed in view of the above-mentioned shortcomings, and allows a worker to easily and reliably open and close large and heavy concrete forms, such as those used for forming manholes, with one-touch operation of the operating lever. This is an improved version.

Embodiments of the present invention will be described below with reference to the drawings.

The figure shows the concrete formwork for forming manholes.
The figure is a plan view, FIG. 2 is a side view, FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. 4 is a sectional view taken along line BB in FIG. 1.

In the figure, 1a and 1b are formworks whose central part is vertically divided into two parts, which can be opened and closed to the left and right.

Moreover, 2 is a core. This core 2 has a conical cylindrical shape that expands at the bottom, has an opening 3 formed in the upper part, and has its lower end fixed on rails 4, 4 arranged in parallel.

The left and right formworks 1a and lb have their bodies 5 set at the same taper angle as the core 2, and bulges 6 and 7 above and below.
It is formed.

Therefore, when the left and right formworks 1a, 1b are closed, a forming space G shown in FIG. 3 is formed between the formworks 1a, 1b and the core 2, and the concrete for the manhole forming phase is poured into this space. It is something that will be done.

The left and right formworks 1a, lb are supported on the parallel rails 4, 4 in a slidable manner.

That is, as can be seen from FIGS. 1 and 4, the formwork 1a,
Two pairs of vertical guide rollers 9 and horizontal guide rollers 10 are provided on the lower end flange 8 of the lb. The horizontal guide rollers 10 are also in contact with the lower surface of the upper horizontal part, so that the formworks 1a, lb can slide smoothly along the rails 4.4.

Note that the rails 4, 4 may be used to slidably support the formworks 1a, lb using any means, and the structure of the rails and the arrangement of the guide rollers are not limited to the above.

Also, both ends of the rails 4, 4 are fixed to the frame 11° 11, and the frame 11.11 is connected by a frame 12.12 parallel to the rails 4, 4, forming a rectangular frame as a whole when viewed from the plane. are doing.

The frame 12 and rail 4 are supported on a lower frame 23.

Next, 13.13 is a working link.

One end of this operating link 13.13 is the left and right formwork law1
At the center of the lower end of b, it is pivotally supported to the flange 8 by a shaft pin 14, and at the other end, it is pivotally supported to both ends of a lever 15 by shaft pins 16 and 16.

The lever 15 is rotatably supported at its intermediate portion by a shaft 17 on a mounting plate 18 .

The mounting plate 18 is preferably mounted between the parallel rails 4.

Reference numeral 19 denotes an operating lever, the lower end of which is pivotally supported to one of the frames 11 by a pin 20, and between the middle of this operating lever 19 and one of the formworks 1a is connected via pins 21 and 21. They are connected by a link 22.

The embodiment of the present invention has the above-mentioned configuration, and in order to open the left and right formworks 1a and 1b when forming a manhole, the operating lever 19 can be tilted forward from the solid line in FIG. 2 as shown by the chain line.

In this way, the formwork 1a on the left side is connected via the link 22.
moves to the right, and its movement is transmitted to the right side formwork 1b through the link 13, lever 15, and link 13, and the movement speed and amount of movement of the left and right formworks 1a and 1b at this time are completely Since they are the same and only the direction of movement is reversed, a constant open/close position can be maintained at all times.

Furthermore, when the operating lever 19 is pulled toward the user, the operation is completely opposite to that described above, and the left and right formworks 1a and 1b, which were previously open, are closed.

In this case, the lever can be operated by a single worker, and there is no work process that requires special physical strength or nerves.

In addition, in the above, it is possible to provide the same operation lever 19 as the left side also on the right side formwork 1b.

In addition, the abutting surfaces of the left and right formworks 1a and lb are strongly tightened with bolts, etc., as in the past, and furthermore, as shown in FIG. However, this window hole 24 has the same configuration as the conventional example,
A lid body 25 and the like are provided.

As explained above, according to the concrete formwork apparatus of the present invention, the left and right formworks, which are separated from each other, are interlocked with each other via the links 13, 13 pivoted at both ends of the lever 15, and are moved along the rail. Since it is provided so that it can be moved in the opposite direction, and the movement is performed using the operating lever 19i, it is suitable for use in formwork for very large concrete products such as manholes, and its weight is also large. can be opened and closed accurately by one worker with extremely simple lever operation, which not only requires fewer workers than before, but also reduces physical strength because it is easy to operate. It has excellent practical effects, such as not requiring excessive force.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the concrete formwork device according to the present invention, Fig. 2 is a side view, Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Fig. 4 is a sectional view taken along the line B-B in Fig. 1. It is a diagram. la, lb...formwork, 2...core, 4
...Rail, 13...Link, 15.
・・・・・・Lever 19・＠＠＊＠＠Operation lever.

Claims (1)

[Scope of utility model registration request] In concrete formwork, in which a pair of divided formworks are opened and closed and concrete is poured inside to form a product, a lever is attached to both ends of the pair of formworks, which is rotatable with the middle part as a fulcrum. The formwork is connected to each other so as to move in opposite directions by pivoted operation links, and is slidably provided along a rail serving as a guide, and is provided with an operating lever that transmits a moving force to at least one of the formworks. Characteristic concrete formwork equipment.