JPS5816813Y2 - Formwork for forming concrete secondary products - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the instant opening and closing of, for example, a mold for forming a bench frineem.

FIGS. 1 and 2 are a perspective view and a cross-sectional view of a conventional mold for forming a bench fringe, and the end plate of this form is a means for moving the end plate toward and away from the inner frame and the side plate parallel to each other. Since screws are used as the end plate, when a large amount of movement of the end plate is required, the number of rotations of the handle increases, and there is a drawback that it takes a considerable amount of time to bring the end plate into contact with and separate from it.In order to prevent this drawback, When the thread pitch of the through-bolts was increased, the end plate became more likely to loosen when sealed, making it impossible to maintain a tight seal, which was a major drawback.

However, the purpose of the present invention is to minimize the time required to connect and separate the end plates, to enable immediate opening and closing, and to provide a formwork for forming secondary concrete products that can maintain complete sealing even during vibration casting. It is something to do.

That is, to explain its operation with reference to the drawings showing an embodiment of the present invention, FIG. 3 shows the end plate in close contact and FIG. 4 shows the end plate in the separated state.

18 is a shaft having a threaded portion 19 at one end and a pin insertion hole at the other end, passing through the inner frame 2 and both end plates 5 and 6; 20 is a nut 21 screwed into the threaded portion of the through shaft 18; A bearing tool which guides the through shaft 18 and is rotatably supported by one end plate 6, 22 is a rotary fastener which is rotatably supported by the other end plate 5 by a rotating shaft 23 and a support rod 24, and 25 is a rotating fastener. An eccentric shaft 26, which rotatably connects the rotary fastener 22 and the through shaft 18 and is provided eccentrically with respect to the center of rotation of the rotary fastener 22, is located between the end plates 5, 6 and the inner frame 2. hand,
A compression spring that is compressed when both end plates are brought into close contact, 27 is a rotating fastener 2
A portion of the stopper 28 provided on the rotary fastener 22 is a convex portion that serves as the point of action of the immediate release lever 29, and the illustrated one shows a case where the rotation axis is horizontal.

The proposed formwork has the above-mentioned structure, and the sealing operation can be completed by rotating the rotary shaft 23 approximately half a turn to the left, as shown in FIG.

That is, the rotating fastener 22 rotates following the rotating shaft 23, and the eccentric shaft 25 overcomes the compression spring 26 by the principle of action and reaction, causing the end plates 5 and 6 to approach each other, and finally the inner frame 2
and side plate 3. By rotating the eccentric shaft 25 so that the position of the eccentric shaft 25 crosses the center line connecting the center of rotation of the bearing 20 that rotatably supports the penetrating shaft 18 and the center of rotation of the rotary shaft 230, it rotates at an appropriate rotation position. The stopper portion 27 provided on the fastener 22 comes into contact with the through shaft 18, preventing further over-rotation and maintaining the formwork in a completely sealed state. As shown in FIG.

To open the formwork, the above operation is reversed, that is, by slightly rotating the rotating shaft 23 to the right and returning the eccentric shaft 25 beyond the center line. 6
are separated parallel to each other, and as a result, the inner frame 2 and the side plates 3 and 4 are separated, completing the opening of the form and resulting in the state shown in FIG.

To perform this opening operation, the rotating shaft 23 may be rotated clockwise as described above, but as shown by the chain line in FIG.
9 to the convex portion 28 of the rotating fastener 22 and strongly pulling the release lever 29 in the direction of the arrow, the same result will be obtained even if the rotating fastener 22 is rotated clockwise.

During both opening and closing operations, the penetrating shaft 18 moves as shown by the chain line in FIG. It does not interfere with operation.

In the embodiment described above, the rotary shaft 23 is provided on the right side when facing the end plate 5, but the same effect can be obtained even if it is provided on the left side.

If the rotation angle of the through shaft 18 that moves during the above operation is small, the bearing 20 may be omitted and the structure will be even simpler.Furthermore, the compression spring 26 may be replaced by a plate spring, rubber or synthetic resin. In the above embodiment, the rotating shaft 23 is horizontal, but there is no difference in the effect even if it is vertical. Fig. 8 shows the implementation in the case where the rotating shaft is vertical. This is an example of an embodiment, and it is possible if the mounting relationship between the end plate 5 and the rotary fastener 22 is shifted by 90 degrees.

FIG. 9 shows a rotary fastener in which a concave portion is provided in place of the convex portion 28 of the rotary fastener, but the operation remains the same.

As mentioned above, this project is a useful device that enables instant opening and closing of formwork for shaping secondary concrete products with a simple structure of attaching rotating fasteners and elastic bodies. It is.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the conventional type, Figure 2 is a sectional view of the same, Figure 3,
Figure 4 is a sectional view of the proposed type, Figures 5 and 6 are partial sectional views, Figure 7 is a partial perspective view, Figure 8 is a sectional view showing separate implementation, and Figure 9 is the same. FIG. 7 is a partial perspective view showing another embodiment. Code: 1 is the underframe, 2 is the inner frame, 3 and 4 are the side plates, 5 and 6 are the end plates, 18 is the through shaft, 19 is the screw part, 20 is the bearing tool, 21
is a nut, 22 is a rotating fastener, 23 is a rotating shaft, 24 is a support rod, 25 is an eccentric shaft, 26 is a compression spring, 27 is a part of a stopper, 28 is a convex part, 29 is a release lever

Claims (4)

[Scope of utility model registration request] (1) Of the four side plates and end plates that form the outer frame, the side plates are rotatably installed on the underframe so as to open outward, and the end plates are attached to the inner frame so that they can freely approach and separate from the formwork. In the formwork for forming secondary concrete products fixed to the underframe, the inner frame is rotatably installed on one end plate 5, and the inner frame 2 and the other end plate 6 are A penetrating shaft 18° (b) that penetrates and protrudes; a rotary fastener 22° rotatably supported by one end plate 5; (c) a rotary shaft 23° (n. ) An eccentric shaft 25° (e) rotary fastener which rotatably connects the protruding end of the through shaft 18 and the rotary fastener 22 and is provided at a position eccentric to the rotation center of the rotary fastener 22 22
In order to prevent over-rotation, stoppers 27° (F) are formed in the valleys of both side walls of the U-shaped rotating fastener 22. A formwork for forming a secondary concrete product, characterized in that it is equipped with an elastic body 26 for generating a separating force. (2) The rotating fastener is made into a U-shape, and the vertical side of the U-shape and the through shaft are brought into contact with each other at the appropriate rotational position, thereby installing a rotating fastener that also serves as a stopper to prevent over-rotation of the rotating fastener. Claim 1 for utility model registration characterized by:
Formwork for forming secondary concrete products as described in section. (3) The rotary fastener is shaped to have a convex portion parallel to the rotation axis, and the convex portion approaches the end plate at the appropriate rotational position of the rotary fastener, so that the formwork opening operation is controlled by the convex portion of the rotary fastener. A formwork for forming a concrete secondary product according to claim 1 of the utility model registration claim, characterized in that the opening lever is used for the purpose of forming a concrete secondary product as a point of action and an end plate as a fulcrum. (4) By locating the rotary fastener in a position parallel to the rotation axis so that the recess approaches the end plate, the formwork opening operation can be performed using the release lever, with the recess of the rotary fastener as the point of action and the end plate as the fulcrum. A mold for forming a secondary concrete product as described in claim 1 of the utility model registration claim characterized by: