JPS588501Y2 - Opening/closing structure of formwork for forming concrete products - Google Patents

Description

[Detailed explanation of the invention] This invention consists of a formwork for forming concrete products,
In particular, the present invention relates to a mold opening/closing structure applied to a multi-cavity mold for simultaneously molding three or more products.

Formwork for forming one or two concrete products is
By moving both end plates and opening the side plates, the molded product can be removed from the inner frame, but in the case of a multi-cavity mold that molds three or more products at the same time, two There are more than two partition plates, and a product molded between these partition plates cannot be removed from the mold simply by moving the end plates.

That is, in such a multi-cavity formwork, for example, as shown in Figures 1 to 3 showing a three-cavity formwork, one of the three inner frames 1, 2.3 One of the inner partition plates 4 and 5 is fixed to the movable inner frame 3, and when demolding, both end plates 6 and 7 are moved and movable at the same time. Move the inner frame 3 and remove the necessary mold 8
, 9.10 need to be formed.

When the end plates 6, 7 are fastened, the side plates 11, 12 have wedge pieces 13, 14, 15 provided on the end plates 6, 7.
16 so as to come into close contact with the inner frames 1, 2.3, and the inner frames 1, 2.3 and the side plates 11, 1.
Since a gasket is interposed between the movable inner frame 3 and the movable inner frame 3 during mold clamping, the gasket may be rubbed by the movable inner frame 3 during mold clamping.
In order to prevent the packing from getting caught between the mold and the fixed inner frame 2, when opening the mold, first move the end plates 6 and 7, open the side plates 11 and 12, and then move the movable inner frame 3. When clamping the mold, it is necessary to move the movable inner frame 3 so that it comes into contact with the fixed inner frame 2, and then move the end plates 6, 7 so that they are fastened to the inner frames 1, 3.

The above explanation is about a three-cavity formwork, but
In the case of a 4-cavity type, two of the inner frames are movable, and in the case of a 5-cavity type, three of the inner frames are movable, and the opening and closing of these can be done by opening both end plates as described above. After that, the movable inner frame is moved to open the mold, the movable inner frame is brought into close contact, and the end plate is moved to close the mold.

As mentioned above, multi-cavity formwork requires multiple movements to open and close, so conventionally the formwork was opened and closed by rotating a screw screw that passed through the formwork vertically. However, in order to improve work efficiency, a demand has arisen for opening and closing such multi-cavity formwork using fasteners that can open and close the formwork with a single motion. .

This invention was made with the aim of obtaining an opening/closing structure for a formwork for forming concrete products that can meet such requirements.

That is, in the opening/closing structure of the formwork for forming concrete products according to this invention, a movable inner frame movably installed on the machine base is provided between at least one end plate and a fixed inner frame, and the movable inner frame is movably installed on the machine base. The movable inner frame is linked to the movable inner frame by a tensioning tool that has a clearance necessary for demolding the product, and there is a space between the end plate and the movable inner frame and between the end plate and the fixed inner frame to separate them. A compression spring is interposed therebetween, and the end plates are linked to each other by a tension rod provided with a fastener, the fastener being capable of opening and closing the formwork with the action of - The mold can be opened and closed by moving the end plate and the movable inner frame in the order described above.

An explanation will be given based on FIG. 4 showing an embodiment of this invention for a three-cavity formwork. In the figure, 1 to 7 are the aforementioned fixed inner frames or end plates, and 17, 18, and 19 are inner frames, respectively. The frame 1, 2.3 has a frame 1, 2.3 having a frame 21. The frame 1, 2.3 has a frame 21. 22 allows it to move on this machine base 20.

23 is a rotary fastener pivoted to the end plate 6, 24 is a rotary fastener 2
Eccentric pin 3 is planted, 25 is eccentric pin 24 and end plate 7
26 and 27 are compression springs interposed between the end plate 6 and the rib 17, 28 and 29 are compression springs interposed between the end plate 7 and the rib 19, and 30 is a bow tension rod. This tube body 30 is inserted through the rod 25, and one end of this tube body 30 is in contact with the rib 18 of the fixed inner frame 2, and a compression spring 31 is interposed between the other end and the end plate 7. There is.

32 is a tensioning tool attached to the end plate 7 and extending into the movable inner frame 3; 33 is a hook portion formed at the tip of the tensioning tool 32; 34
is a clearance existing between the hook portion 33 and the rib 19, and this clearance 34 is larger than the tightening length of the wedge pieces 13 to 16 shown in FIG.

The opening/closing operation of the formwork configured as described above will be described below.

When the rotary fastener 23 is rotated half a turn from the mold clamping state shown in FIG. 4, the end plates 6 and 7 are moved by the spring force of the clamping springs 26, 27 and 28, 29, 31, and the wedge pieces 13 to 16 are separated. Then, the side plates 11 and 12 are separated, and then the hook portion 33 of the tensioning tool 32 and the rib 19 of the movable inner frame 3 engage with each other, and the movable inner frame 3 is pulled out by the force of the compression spring 31, as shown in FIG. The mold is opened in the state shown.

When the rotary fastener 23 is rotated in the fastening direction from this mold open state, the compression spring 31 is first compressed, and the movable inner frame 3 is pushed by the compression springs 28 and 29 and comes into close contact with the fixed inner frame 2. In this state, the side plates 11 and 12 are raised and the wedge pieces 13 to 16 are engaged, and by further rotating the rotating fastener 23, the end plates 6, 7 and the side plates 11, 12 are fastened, as shown in FIG. is in the fastened state.

If you want to have four molds, you can install the same type of movable inner frame 3 between the fixed inner frame 1 and the end board 6 as shown in Figure 4, but if you want to have five or more molds, are fixed inner frames 1 and 2
A plurality of movable inner frames must be provided on at least one side of the movable inner frame.

Figure 5 shows two movable inner frames 3 between the fixed inner frame 2 and the end plate 7.
4 is a partial sectional view showing an embodiment in which tubes 30a and 3b are provided, and in this embodiment, a tube body 30a corresponding to the tube body 30 in FIG. 4 is fixed to the end plate 7, and this tube body 30
A flange 35 having a function corresponding to the hook part 33 in FIG. 4 is shown in a.
a and 35 b are fixedly installed, and the end plate 7 and the fixed inner frame 2
A compression spring 31 a is interposed between the tube body 30 a and the rib 18 of the fixed inner frame 2 .

The clearance 34a between the collar 35a and the rib 19a of the movable inner frame 3a may be equal to the clearance 34 in FIG.
clearance 34 b between the rib 19 b of the movable inner frame 3 b
is larger than the play 34a, and the stroke of the compression spring 31a must be larger than the stroke of the compression spring 31 shown in FIG.

With this configuration, when the mold is opened, the end plate 7 moves first, then the movable inner frames 3a and 3b move, and the demolding required for demolding the product is formed between them, and when the mold is clamped, the movable inner frames 3a and 3b move. After the movable inner frames 3a and 3b are brought into close contact, the end plate 7 is fastened.

As mentioned above, the opening/closing structure of concrete formwork according to this invention uses fasteners that can open and close the formwork by one action, and when the formwork is opened, the mold is removed between each inner frame and end plate of the formwork. The opening/closing structure of this invention is such that the movement order of the end plate and the movable inner frame when opening and closing the formwork also matches the opening/closing procedure of a general multi-cavity formwork. By adopting this method, it becomes possible to open and close the multi-cavity formwork in one operation, greatly improving work efficiency when forming concrete products.

[Brief explanation of drawings]

Fig. 1 is a plan view of a formwork for forming concrete products, Fig. 2 shows the formwork in its clamped state, Fig. 3 shows its open state as shown in section A of Fig. 1, and Fig. 4. Figure 5 is a central vertical sectional view showing an embodiment of this invention in the case of a three-piece structure, and Fig. 5 is a central portion showing an embodiment in which two movable inner frames are provided between the fixed inner frame and the end plate. FIG. 1.2...Fixed inner frame, 3, 3 a, 3 b.
...Movable inner frame, 4゜5.5 a, 5 b...
...Inner partition board, 6,7... End board, 8,9゜1
0... Demolding, 20... Machine stand, 21,
22...Wheel, 23...Rotating fastener, 2
5...Tension rod, 26, 27, 28.29...
... Compression spring, 30, 30 a ... Pipe body, 3
1, 31a... Compression spring, 32... Tension tool, 33... Hook portion, 34, 34 a, 34
b... Play space, 35 a, 35 b...
・Tsuba.

Claims (1)

[Scope of utility model registration request] A movable inner frame that is movably installed on the machine base is provided between at least one end plate and the fixed inner frame, and the end plate and the movable inner frame have a clearance necessary for demolding the product. In addition to being linked by a tensioning tool, compression springs are interposed between the end plate and the movable inner frame and between the end plate and the fixed inner frame to separate them, and the end plates are fastened together. An opening/closing structure for formwork for forming concrete products, characterized by being linked by tension rods equipped with tools.