JPS61229502A - Concrete formwork - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to concrete formwork for manufacturing segments, etc.
In particular, it relates to concrete formwork having horizontal protrusions that impede demolding.

Conventional technology 7 Conventional concrete formwork for manufacturing segments, etc. has sideways protrusions that impede product release.
As shown in FIG. 6, the protrusion 25 is inserted into the installation position through the gap between the reinforcing bars 24 and held, and the formwork A is attached to the protrusion 25K.
Insert the support member path from the hole n of the section I6 on the opposite side of the
After fitting the tip into the hole receptacle of the protrusion 25 and the positioning hole 31 of the protrusion 30 to hold the horizontal front protrusion 25 in the formwork A', insert the reed into the formwork A'. Including product 3
2 is molded, and after the product 32 has hardened, the support member 28 is pulled out to free the protrusion 25 as shown in FIG. It was to be taken out.

The problem that the invention seeks to solve.

In the conventional concrete formwork described above, the protrusion 25 is supported by the support member 28 that runs across the inside of the formwork A', so the operation of installing and removing the protrusion 25 in the nine ways described above is extremely troublesome and time-consuming. In addition, the protrusion 25 is attached to the formwork A.
It is easy to drop the product 32 into the product 32, and in this case, it is difficult to pick it up and takes more time.Furthermore, if the support member 28 is used, this will create an unnecessary hole in the product 32, and furthermore, there will be a protrusion. As shown in Fig. 4, if the object is large, it cannot be inserted through the gap between the reinforcing bars 24, so the protrusion 2
5' is placed in the formwork A' in advance.

In order to avoid this, the reinforcing bars 24 have to be installed within the formwork A', and the reinforcing bars also require a considerable amount of effort and time, making them unsuitable for use in dormitories.

The present invention was made in order to solve the above-mentioned conventional problems, and it is possible to install a protrusion by moving the protrusion horizontally into the formwork through a window hole.

The purpose of the present invention is to provide a concrete formwork that is easy to remove, does not require unnecessary holes to be made in the product, and does not require reinforcing bars.

Means for Solving the Problems The concrete formwork according to the present invention is shown in drawings 1 to 5.
As in the embodiment shown in the figure, the lateral protrusion 10 in the formwork A
A window hole 8 provided in the installation part of
A protrusion 10 that moves in and out of the window, and members 13 and 21 that guide the protrusion 10 to correctly move in and out of the window hole 8.
This member 13.

21 operating means 20 and 23 are provided.

Function: In the concrete form constructed as described above, as shown in FIG.
When the projection 10 is pulled toward the side, the members 13 and 21 project the protrusion 10 from the window hole 8 into the formwork A. This state is held by the operating means 20 and 23, and the concrete is poured into the formwork A. When filled, a product [1] having recesses 12 formed by the projections 10 described above is obtained. Therefore, after waiting for this product 1 to harden to a state where it can be removed, protrusions 1
01ft Supporting members 13, 21'f: Operating means 2
0 and 23 in the opposite direction to the window hole 8, the protrusion 10 is pulled out of the product [1 by the members 13 and 21 and moved to the standby position 9. At this time, the formwork A is opened and the product inside is removed. By pulling upward 11, a concrete product such as a segment in which recess 12 is formed by projection 1O can be easily demolded.

Embodiment Next, an embodiment of the concrete formwork according to the present invention will be explained based on the drawings.

In Figures 1 to 1 of the drawings, A is a formwork, and front and rear side walls 2.2 and left and right side walls 3.3 are provided on the outside of a rectangular bottom plate 1 as shown in Figure 1. The lower end of the side wall 2.2 is attached to the protrusion 5 provided on one side of the base 4 by a shaft 6, as shown in FIG. The product is held upright, and when demolding the product, it is tilted outward and away from the product as shown by the chain line in Figure 5.The inside of this formwork A has multiple ridges as shown in Figure 4. Part 7
is provided.

Reference numeral 8 denotes a window hole provided at the mounting position of the protrusion (to be described later) of the raised portion 7 in the formwork A described above.
This is for protruding inward or retracting to the standby position 9 under the protrusion 7, and when the protrusion is pushed out into the formwork A, it comes into close contact with the protrusion and concrete grows between them. It is formed so that there are no gaps.

Reference numeral 10 denotes a protrusion, which is placed so as to protrude into the formwork A from the window hole 8 described above, and when filling the formwork A with concrete 17-), manufacturing, and de-aging the product L1, it is pulled out from this and placed on standby. position, position 9
．． to draw you in. .

Reference numeral 13 denotes a lever that guides the operation of the above-mentioned protrusion 1O to drain water from the window hole 8. As shown in Figs. It is pivotally attached to the shaft 14, and the intermediate pin is is engaged with the elongated hole 16, and the female thread 17 is inserted i, 'This female thread 17! II
1g and stopper 19, and engage the feed screw 20.
When O is projected into the formwork A from the window hole 8 and the feed screw 20 is rotated in the other direction, the lever 13 is rotated in the opposite direction to the window hole 8, and the projection 10 is moved into the window hole 8. From hole 8 to standby position 9
Try to pull it into the position, Vinyl: 25゜4□7゜+3-+
-mlpo'fm. 5. .

This is different from the previous embodiment in that the raising and lowering of the front and rear side walls 2 of the formwork A and the coming and going of the protrusion 10 are linked, and the protrusion IO can be attached to the upper end v N -2
1 is pivotally connected at its middle to a shaft 22 supported by pace 4, and one end of a droplet 23 is connected to the lower end.
By connecting the other end of 23 to the lower part of the front wall 2 in the formwork AK, when the KIItI wall 2 is raised as shown by the solid line in the same figure, the lever 21 is pushed at the lower end and stands upright, and the upper end protrusion @l
When O is made to protrude into the formwork A through the window hole 8 and the front wall 2 is brought down as shown by the chain line, the lever 21 is pulled at its lower end and falls down, and the projection 10 at the upper end is pulled into the standby position 9 from the window hole 8. In this embodiment, the protrusion 10 can be moved in and out by assembling the mold and manipulating the shoe ribs □ and . This saves labor and improves work efficiency even more than the fifth embodiment.

Effect of the invention , .

Con about Hon-Rakumei! 4+
Move - in and out of Pl. −Te, Tsu:, @ installation,
The separation → is performed quickly and reliably without any trouble.

5. Holes, etc. are useless for the product because there is nothing inside the formwork to support the protrusions. It is not formed m,,n~yo7.5-86,-t'Ld,6,wa.

stomach.

If you place reinforcement avoiding the corresponding parts, you can manufacture reinforcing bars without needing them at present.

If it is connected to the wall plate, the opening/closing and the coming and going of the protrusion can be linked to further improve work efficiency.

It has a unique effect.

Figure 1 and Figure 1 are five points related to the present invention.
Figure 11 shows the state in which the protrusion has been pushed out into the frame 11, and Figure 2 shows the state in which it has been retracted into the standby position device. No. 11
1 3 solid same as above! Rear view of the main parts hung on the frame. Figure q, yo.
,,. t-oh. Guy. FIG. 5 is a partial longitudinal sectional side view showing another implementation of the yo-yo. IIEA diagram &,,1E71! I
-:. O* y a +3-) □, O part of vertical side-
1,1E4a in the figure! II indicates the i-waiting state of the protrusion, 111E
Figure 7 shows the state in which ridge 5 is free.

be.

a m A W punishment 1h-RW11174. -10 & fist!
-11,! ;! 1 is a protrusion 10 e a guiding member, 17
, 20 and 23 are operating means.

≠ No. No.

Claims (1)

[Claims] A window hole provided in a portion of the formwork where the horizontal projections are disposed, a projection that moves in and out of the formwork through the window hole, a member that guides the projection to correctly move in and out of the window hole, and a means for operating this member. A concrete formwork characterized by being equipped with.