JPS61266771A - Mold frame assembling method and mold frame clamp used therein - 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] [Industrial Application Field] The present invention is designed to prevent the weir plates that are in contact with concrete and adjust the shape of a concrete structure from opening beyond a predetermined distance due to the lateral pressure of the concrete. The present invention relates to a formwork assembly method for assembling a formwork by tightening weir plates to end pieces, and a formwork fastener used therein.

[Prior art and its problems]

Formwork for constructing concrete structures, which forms concrete structures such as retaining walls, uses a weir plate that contacts the concrete to adjust its shape, and the formwork fasteners, which consist of a separator and form ties attached to both ends, It can be assembled by fixing it to thick timber.

FIG. 3 is a perspective view showing a separator of a conventionally used formwork fastener, and this separator S has male threads 31R and 3
1L is screwed, washers 32R and 32L are screwed onto each male screw 31R and 31L, and the male screw 31R and 31L are screwed together.
The sections are penetrated through the weir plate, and a form tie is attached to the tip of the weir plate through a thick piece of material.

However, such a separator S had the disadvantage that it could not be used as is in cases where the spacing between weir plates was wide or narrow, such as in formwork for a retaining wall formed at a predetermined slope. .

That is, in a wide part where the interval between the weir plates is longer than the separator S, there is a drawback that the separator S cannot directly connect the weir plates.

Therefore, conventionally, as shown in Fig. 4, first, two steel bars 4
One ends of 0R and 40L are passed through the weir plates 41R and 41L, respectively, and form ties 42R and 42L are attached to the tips of the weir plates 41R and 41L, respectively, to connect the weir plates 41R and 41L to the horizontal end thick 43R and 43L.
Tighten L and vertical end thickness 44R244L, then weir plate 41
With the desired spacing between R and 41L, the steel bars 40R and 4
A joint steel bar 45 is passed between the other ends of 0L, and both ends of the joint steel bar 45 are welded to the steel bars 40R and 40L.

However, in this method, the joint steel bar 45 is welded between the steel bars 40R and 40L at the end of the formwork assembly process to form the separator S, so during assembly, the distance between each weir plate 41R and 4LL is There is a problem in that it is not possible to maintain a predetermined spacing using a separator.

For this reason, it was unavoidable that each weir plate 4 be
There are 50 blocks called Urazan on the back of 1R and 41L, respectively.
Weir plates 41R, 41R- and weir plates 41L, 41L-, which are integrally supported by nailing and integrally supported by blocks 50.
After placing them facing each other at a predetermined interval as shown in the figure,
The joint steel bar 45 is welded between the steel bars 40R and 4OL, but in this case, the work of nailing each weir plate 41R, 41L to the block 50, and the work of removing it and dismantling the formwork after use are required. It's very troublesome and at the same time
There was also an accident in which a worker was injured by a nail attached to the weir board 41R241L that was removed from the block 50. Furthermore, welding the joint steel bar 45 is not only very troublesome but also very dangerous in rainy weather.

[Purpose of the invention]

Therefore, the present invention aims to solve the above-mentioned problems all at once.It is an object of the present invention to solve the above-mentioned problems all at once. It is an object of the present invention to provide a method for assembling a formwork that can maintain a predetermined distance between the weir plates depending on the width of the weir plate, and a formwork clamping tool used therein.

[Structure of the invention]

In order to achieve this object, the method for assembling a formwork according to the present invention includes a turnbuckle formed by screwing a steel bar of a predetermined length into female screw parts formed at both ends of a rotating frame. A separator is interposed between the weir plates, and form ties are attached to both ends of the separator to fix the two weir plates to the thick material, and the length of the separator is adjusted by rotating the rotating frame in a desired direction. Accordingly, the weir plates are kept at a predetermined distance.

Further, in the formwork fastener according to the present invention, the separators that maintain a predetermined interval between the weir plates constituting the formwork for concrete structure construction are attached to the female threaded portions formed at both ends of the rotating frame. It is characterized by being configured as a turnbuckle made by screwing together steel bars of a predetermined length.

〔Example〕

The present invention will be explained below based on specific embodiments shown in the drawings.

FIG. 1 is a diagram showing an example of the method of the present invention and a formwork fastener used therein.

First, the formwork clamping tool 2 used for assembling the formwork 1 is attached to the weir plate 3.
Consisting of a separator 4 that maintains a predetermined distance between R and 3L, and form ties 7R and 7L that are attached to both ends of the separator and tighten and fix the weir plates 3R and 3L to the vertical end thickness 5 and the horizontal end thickness 6, respectively. has been done.

Here, the separator 4 is constituted by a turnbuckle in which rods 1119R and 9L of a predetermined length are screwed into female screw portions formed at both ends of the rotating frame 8, respectively. Each of the steel bars 9R and 9L has a male thread 10 threaded over a predetermined length on one end thereof to be engaged with a female threaded part of the rotation frame 8, and a joint part for connecting a fitting 11 on the other end. 2 is formed.

Each joint fitting 1 has a male screw threaded on both sides of the steel bar, one end of which is screwed together with a female threaded part of the joint part 12, and the other end with the washer 13 attached to the weir plate 3R,
It passes through 3L and is screwed into form ties 7R and 7L.

In addition, steel pipe ends are used for the vertical ends 5 and the horizontal ends 6, and the weir plates 3R, 3L are tightened by driving wedges 14 into the form ties 7R, 7L.

The above is the configuration of the formwork fastener 2, and next, a method of assembling the formwork 1 using this will be explained.

First, connect the fittings 11 to the joint parts 12 of the rods tli9R and 9L, respectively, and hold the weir plates 3R and 3L in a horizontal state.
to intervene in between. Then, the rotary frame 8 is rotated in a predetermined direction, and the rods m9R and 9L are extended by the required length according to the desired spacing between the weir plates 3R and 3L, and at the same time, the tips of each joint fittings 11 are connected to the weir plates 3R and 3L. Insert it into the through hole drilled in 3L.

Next, the form ties 7R and 7L are connected to the tips of the joint fittings 11 that have penetrated the weir plates 3R and 3L, respectively, and the shafts 14 are driven into each of the form ties 7R and 7L to connect the vertical end thickness 5 and the horizontal end thickness 6 to the weir plate 3R. , 3L and tighten the weir plates 3R and 3L.

As a result, the weir plates 3R, 3L are fixedly supported by the vertical end pieces 5, 5 with a predetermined distance maintained by the fasteners 2. At this time, if there is any discrepancy in the distance between the weir plates 3R and 3L,
The spacing can be precisely and finely adjusted simply by rotating the rotary frame 8 and expanding and contracting the steel bars 9R and 9L.

Next, as shown in FIG. 2, weir plates 3R', 3L'' etc. are successively installed below the weirs vi3R, 3L. Since a part of the formwork 1 has already been formed by being fixedly supported by the vertical end pieces 5.5 while maintaining a predetermined interval, weir plates 3R, Weir plates 3R'' and 3L' can be easily and quickly attached to the lower end of 3L. Therefore, there is no need to attach a backing to each weir plate to integrate it as in the past.

As shown in Fig. 2, if the distance between the weir plates 3R' and 3L'' becomes wider than a certain level, the rod m9 is removed as shown in the figure.
These same steel bars 9 are further connected to the tips of one or both of R and 9L, and a joint fitting 11 is connected to the joint portion 12 at the tip of the bar w49.

Further, even if the distance between the weir plates becomes wider, the width between the weir plates can be sufficiently accommodated by simply connecting the required number of steel bars 9 as necessary. As described above, according to the present invention, the length of the separator 4 can be freely adjusted by simply rotating the rotating frame 8 in a predetermined direction, and the length of the separator 4 can be adjusted freely by simply rotating the rotating frame 8 in a predetermined direction.
Since it can be fixed by tightening the vertical end thickness 5.5 while maintaining the distance between L at a predetermined distance, it is possible to fix the weir plate 3R as in the conventional case.

3L and the weir plates 3R', 3L', etc. connected below the weir plates 3R', 3L', etc., are not required to be integrated in advance by nailing them to the backing etc., or there is no need to perform dangerous and troublesome welding work,
It is particularly suitable for manufacturing formwork for retaining walls having a predetermined slope.

Further, as in the embodiment, a joint part 12 is formed at the tip of the steel bars 9R, 9L to be screwed into the female threaded part of the rotating frame 8, and the joint part 2 is formed in the same manner as the steel bars 9R, 9L. If the steel bars 9 are connected together, the weir plates 3 with wide intervals can be connected.
It can be easily tightened between R' and 3L'.

Furthermore, the formwork fastener 2 according to the present invention can be said to have an extremely simple structure compared to the conventional product by only using an extra rotary frame 8 for the separator 4. It also has excellent economic efficiency as a seed fastener.

In addition, in the above-mentioned embodiment, a joint part 12 is formed at the tip of the steel bars 9R, 9L, and an example of the separator 4 is connected to the form ties 7R, 7L via a joint fitting 11 connected to the joint part 12. However, the separator according to the present invention may be one in which male screws are formed at both ends of a steel bar that is screwed onto both ends of the rotating frame, and one end of which is directly connected to a form tie.

〔Effect of the invention〕

As described above, according to the present invention, the weir plate can be welded by an extremely simple means without the need for dangerous and troublesome welding work as in the past, and without the need for attaching a backing or the like to the back side of the weir plate. An excellent effect is that the formwork can be assembled easily and quickly while maintaining the predetermined spacing between the weir plates, depending on the width of the spacing between the weir plates.

[Brief explanation of drawings]

FIGS. 1 and 2 are explanatory diagrams showing an example of a formwork assembly method according to the present invention and a formwork fastener used therein, respectively, and FIG. 3 is an illustration of a separator used in a conventional formwork fastener. A perspective view showing an example, and FIGS. 4 and 5 are explanatory diagrams showing a conventional assembly method. Explanation of symbols■...-Formwork, 2-Formwork fastener, 3R, 3L, 3R''. 3L'...-Weir plate, 4-Separator, 5--Vertical end thick,
6--Horizontal thick, 7R, 7L--Form tie, 8
- Rotating frame, 9R, 9L... Steel bar, 10- Male thread, 11- Joint fittings, 14- Model. Patent applicant Suehiro Tateno! j:51rM Figure 3, bottom 4

Claims (4)

[Claims] (1) Assemble the formwork by tightening each weir plate to the end pieces so that the weir plates that touch the concrete and adjust the shape of the concrete structure do not open more than a predetermined distance due to the lateral pressure of the concrete. In the method for assembling a formwork, a separator configured as a turnbuckle formed by screwing a steel bar of a predetermined length into female screw portions formed at both ends of the rotating frame is interposed between the weir plates, Form ties are attached to both ends of the separators to fix the two weir plates to the end pieces, and the length of the separators is adjusted by rotating the rotary frame in a desired direction to maintain a predetermined distance between the weir plates. A method for assembling formwork, characterized in that the formwork is maintained at intervals of . (2) A formwork consisting of a separator that maintains a predetermined spacing between the weir plates that make up the formwork for concrete structure construction, and form ties that are attached to both ends of the separator and tighten the weir plates to the end pieces. The formwork clamping device is characterized in that the separator is configured as a turnbuckle formed by screwing a steel bar of a predetermined length into female threaded parts formed at both ends of the rotating frame. Fittings. (3) The formwork fastener according to claim 2, wherein the tip of each of the steel bars is provided with a male thread that engages with the form tie. (4) The formwork fastener according to claim 2, wherein the tip of each of the steel bars is connected to the form tie via a joint fitting of a predetermined length.