JPH023846Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clamp for a formwork device for forming concrete blocks such as foundation blocks used in architecture and civil engineering work.

[Prior Art] Concrete blocks used in construction and civil engineering work are mass-produced in factories using steel formwork equipment. Conventional formwork equipment of this type, for example,
The front plate, back plate, and side plates on both sides are attached to the bottom plate via hinges so that they can be opened and closed, and when the mold is closed, these wall members are fixed to each other with bolts or with small clamps. The structure was such that it was tightened and fixed.

[Problems to be solved by the invention] However, with a formwork device that uses bolts to tighten and fix the front plate, side plate, etc., there is a problem in that it takes time to open and close the mold, and there is also the problem that small clamps are required. Formwork devices that use concrete to close the front and side panels have problems such as weak clamping force because they are not dedicated large clamps, and gaps can form during concrete pouring.

[Means for Solving the Problems] The present invention has been developed in consideration of the above points, and provides a concrete block that allows the opening and closing plate to be opened and closed easily and quickly, and that can firmly maintain the closed state of the mold. The present invention provides a clamp for formwork equipment for use in the formwork industry, and is constructed as follows.

That is, the clamp of the present invention is a clamp that is attached to an opening/closing plate of a formwork device for molding a concrete block and tightens and closes the same.
A lever in the shape of a letter is pivotally supported on a mounting base that is height-adjustable on the front surface of the opening/closing plate, and locking metal fittings are pivotally supported on both ends of a rotating shaft that is inserted into the approximate center of the lever. An opening through which a hook provided at the tip of the locking metal fittings on both sides is inserted is provided in the opening/closing plate and a fixed part with which the opening/closing plate comes into contact, and the hook at the tip of the locking metal fitting is locked. The fixed part is provided inside the fixed part.

[Function] In this clamp for formwork equipment, when the opening/closing plate is closed to the fixed part, the tips of the two locking metal fittings are inserted into the opening and the hooks are locked to the inner locking part. When the lever is rotated around the rotation axis,
When the dead center is exceeded, the two locking metal fittings perform a clamping action, and the opening/closing plate is completely tightened and closed against the fixed part.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

First, the perspective view in Figure 5, the enlarged front view in Figure 6,
The overall structure of the formwork apparatus 1 will be explained with reference to the side view of FIG. 7. The formwork apparatus 1 is constructed to form a basic concrete block having a T-shaped cross section. The base 2 is formed by vertically and horizontally assembling frame members each having a U-shaped cross section. A side plate member 3 is erected and fixed on one side of the base 2, and a tilting plate 4 is installed on the opposite side.
is attached via a hinge so that it can tilt outward from the base 2. The bottom plate 5 is provided on the center of the base 2, and a space 8 for a foundation block is formed between and above the bottom plate 5, the side plate members 3, and the tilting plate 4. The tilting plate 4 can be tilted outward by a hinge between it and the base 2, and a damper stay 6 that slows down this tilting movement is connected to a rib 4 attached to the tilting plate 4.
a and the base 2. A long clamp 7 is attached to the top of the tilting plate 4, and the end of the long clamp 7 is locked to a receiver attached to the top of the side plate member 3, and a lever provided at the tip of the long clamp 7 is engaged. Operate to tighten and fix the tilting plate 4 in the closed position.

On the front and back sides of the formwork device 1, a front plate 9 and a back plate 10 for closing the space 8 are attached to side plate members 3 as fixed parts so as to open left and right via hinges as opening/closing plates. Front plate 9 and back plate 10
are bilaterally symmetrical and similarly formed, and are each fitted with a similar clamp 20 as shown in FIG.

This clamp 20 mainly includes a mounting base 21 that is height-adjustably mounted on the front surface of the front plate 9, an L-shaped lever 22 that is pivoted horizontally with respect to the mounting base 21, and an abbreviation of the lever 22. It is composed of a rotation shaft 24 fitted in the center and locking metal fittings 23 pivotally supported at both ends. As shown in FIGS. 1 to 4, the mounting base 21 is supported by an upper shaft 25 between two ribs 9a on the front plate 9, and the lower part of the mounting base 21 is attached to the front surface of the front plate 9. It is fixed in a height-adjustable manner by a bolt 26 and two nuts 27 protruding from the top. By adjusting the height of the lower part of the mounting base 21, the clamping force of the clamp 20 can be adjusted to some extent. The lever 22 is composed of two lever members connected by a rod 28 at the lower end and a rotation shaft 24, and the tip of the lever 22 is rotatably supported by a shaft 29 with respect to the mounting base 21. In addition, two locking metal fittings 2
3 are connected and fixed to each other by a connecting lever 30, and are connected to the lever 22 via a rotation shaft 24, and a hook portion 23a is formed at the tip of the locking metal fitting 23. On the other hand, openings 31 into which the hooks 23a are inserted are formed at corresponding positions between the front plate 9, the side member 3, and the tilting plate 4. A locking portion 32 to which the hook portion 23a is locked is fixed. Note that a clamp similar to the above is provided on the back plate 10 as well. Further, a rubber sealant is provided at the peripheral edge of the space 8 on the front and back surfaces of the side member 3 and the tilting plate 4, thereby improving the sealing performance between the front plate 9 and the rear plate 10.

Next, the operation of the clamp 20 together with the formwork device 1 will be explained.

When pouring concrete mortar, first, the long clamps 7 on the side plate members 3 and the tilting plate 4 are operated to clamp the tilting plate 4 to the side plate member 3 in the closed position. Then, the front plate 9 and the back plate 10 are closed, and the hook portion 23a at the tip of the locking fitting 23 is inserted into the opening 3.
1 and lock it in the internal locking part 32, push down the lever 22 from the position shown by the imaginary line (double-dashed line) in FIG. 3, and turn it to the position shown by the solid line.
At this time, the lever 22 rotates downward about the shaft 29, but the locking fitting 23 connected via the rotation shaft 24 is restricted from rotating downward by the hook portion 23a. At this time, the lever 22 exceeds its dead center due to the extension of the locking fitting 23, and when it reaches the position shown by the solid line in FIG. 3, the clamping is completed. By the operation of this one clamp 20, the front plate 9 is securely tightened and closed against the side plate members 8 and the tilting plate 4, and the back plate 9 is also tightened and closed by the same clamp.

After reinforcing bars are placed in the space 8 of the formwork device 1 in this state, concrete mortar is injected from above to form a foundation block with a T-shaped cross section. When the concrete hardens, move the lever 22 to the third position.
Pull it up to the position indicated by the imaginary line (double-dashed line) in the figure. Then, the connecting lever 30 comes into contact with the mounting base 21, and when the lever 22 is further pulled up, the locking metal fitting 23 moves in the direction of the imaginary line in FIG. will be released. The clamp 20 can be untightened by simply pulling up the lever 22 to the position indicated by the imaginary line in FIG. 3, and the front plate 9 and the rear plate 10 can be freely opened. Meanwhile, the long clamp 7 on the side plate member 3 is also unclamped, and the tilting plate 4 is in a state where it can be opened outward, and by the action of the damper stay 6, it is gently opened to a certain angle, and the foundation block is taken out. It can be done.

[Effects of the invention] As explained above, according to the clamp of the formwork device of the invention, the L-shaped lever is pivotally supported on the mount that is height-adjustable on the front of the opening/closing plate, and the lever A locking metal fitting is pivotally supported at both ends of a rotating shaft that is inserted approximately in the center of the locking metal fitting, and the opening and closing plate is in contact with the opening/closing plate through which the hooks provided at the tips of the locking metal fittings on both sides are inserted. The fixing part is provided with a locking part on the inside of the fixing part, and a hook part at the tip of the locking fitting is locked. Therefore, the opening/closing plate can be completely tightened and closed against the fixed part with the simple operation of closing the opening/closing plate and rotating the lever of the clamp. Similarly, the opening/closing plate can be opened easily and quickly. It is possible to improve the productivity of concrete blocks using formwork equipment.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is an enlarged front view of the clamp, Figure 2 is a sectional view taken along line A-A in Figure 1,
Fig. 3 is a sectional view taken along line B-B in Fig. 1, Fig. 4 is a sectional view taken along line C-C in Fig. 2, Fig. 5 is a perspective view of the formwork device, Fig. 6 is a front view thereof, and Fig. 7. is a right side view of the same, and FIG. 8 is an enlarged cross-sectional view taken along line DD in FIG. 7. 1... Formwork device, 3... Side plate member (fixed part),
4...Tilt member (fixed part), 9...Front plate (opening/closing plate), 10...Back plate (opening/closing plate), 20...Clamp, 21...Mounting base, 22...Lever, 23...
Locking metal fitting, 23a... hook portion, 32... locking portion.

Claims (1)

[Scope of utility model registration request] This is a clamp that is attached to the opening/closing plate of a formwork device for molding concrete blocks to tighten and close it, and an L-shaped lever is pivoted against a mount that is height-adjustably attached to the front of the opening/closing plate. A locking metal fitting is pivotally supported at both ends of a rotating shaft that is supported and inserted into approximately the center of the lever, and an opening through which a hook provided at the tip of the locking metal fitting on both sides is inserted is connected to the opening/closing plate. A clamp for a formwork device, characterized in that a locking part is provided on the fixed part that the opening/closing plate abuts, and a locking part to which a hook at the tip of the locking fitting is locked is provided inside the fixed part.