JPH01169047A - Concrete formwork with adjustable dimension - Google Patents

Abstract

PURPOSE:To vary and adjust the length and width of a formwork without damaging strength and rigidity by forming a member supporting a crosspiece for the formwork and transmitting load over a clamp, etc. in simple and firm lap joint structure. CONSTITUTION:Both or either one of longitudinal members 1 supporting a crosspiece for a formwork and transmitting load over clamps, etc. and lateral members 2 supporting the crosspiece for the formwork and transmitting load over clamps, etc. are overlapped in parallel at the end sections of two single members 3a, 3b supporting the crosspiece for the formwork and transmitting load over clamps, etc. in which a large number of bolt inserting holes are disposed in rows at regular intervals, and clamped mutually by using connectors 4 by seat bodies and bolts and nuts, thus shaping a member supporting the crosspiece for the formwork and transmitting load over clamps, etc., length of which can freely be adjusted. Sheathing boards 6a, 6b are installed separately to said single members 3a, 3b under the state in which they are divided into two while the positions of coupling of said members 3a, 3b are employed as boundaries, and regulating sheathing boards 15 are interposed freely among these sheath boards 6a, 6b, thus constituting the title concrete formwork.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete formwork whose length and width can be freely increased or decreased.

(Prior art) The formwork used for pouring concrete has conventionally been made by using a single piece of light-weight steel or two pieces in parallel as a piece of batting material, and connecting the pieces of batting material vertically and horizontally in a lattice pattern. They are formed by attaching weir boards to these bata materials, but the size of the formwork, that is, the length and width, must be configured according to the object to be constructed, so it is necessary to assemble and disassemble it each time construction is carried out. In reality, it requires a lot of effort and is inefficient.

(Problem that the invention seeks to solve) In recent years, formwork technology has required the repeated use of formwork, as in the case of mobile formwork. There is a growing need for formwork that can easily adapt to different construction conditions. for that purpose,
It is necessary to make the formwork adjustable so that the size of the formwork can be easily increased or decreased to some extent while it is still assembled with weir boards and batten materials.

In a formwork whose size can be adjusted freely, a major problem is how to adjust the length of the butterfly material, which is a load-bearing member of the formwork. To form the length-adjustable bata material,
It is necessary to overlap the butter materials and to connect them so that the length of the overlap can be adjusted. However, the conventional method of joining bata materials together involves sandwiching the bata materials together using washers, etc. Therefore, the overlap joints of bata materials are structurally mechanically unstable. This is a discontinuous part of the beam, and it can be said that it is almost impossible to transmit stress to each other. Therefore, the formwork is particularly weak at the overlapped and spliced portion of the butter material for adjusting the length, and the strength and rigidity of the formwork are significantly impaired. Solving this problem can be said to be a major technical challenge in size-adjustable formwork.

In order to form a butterfly material into an expandable beam material, a structure can be considered in which large and small diameter steel pipes, which are jointed with the same axes, are put in and taken out. However, in this structure, a difference in level occurs at the joint portion, and a gap is created between the weir plate and the small diameter pipe portion, which requires a lot of time and effort, and is not practical. Therefore, it is necessary to obtain a structure in which the butterfly materials of the same diameter are stacked and joined in parallel, and the two butterfly materials can be connected firmly and adjustably in the axial direction without causing any displacement. .

As a result of various studies on this problem, the inventor of the present invention has found that the strength and rigidity of the formwork can be improved by solving the problem of a simple yet strong overlapping joint structure made of butter, which allows the length and width of the formwork to be increased or decreased. They succeeded in creating an adjustable concrete formwork that can be easily constructed without damage.

(Means for solving the problem) The structure of the present invention will be explained with reference to drawings corresponding to embodiments. Many bolt insertion holes 9 at equal intervals,
9 are arranged in a row, parallel and overlapping at the ends of the two bata single members 3a and 3b, and the seat body IO and the bolt/nut 12.1 are mutually connected.
12.
12 is passed through the bolt insertion hole 9.9 of the single batt material 3a, 3b and tightened with a nut 13.13 to form a batt material whose length can be freely adjusted. , 3b are divided into two with the joining point as a boundary, and each is constructed separately on single bata members 3a, 3b, and the weir plates 6a, 3b are constructed separately.
6b is characterized in that an adjustable weir plate I5 can be freely interposed between them.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In Figure 1, 1. I denote vertical butterfly materials, which are arranged at required intervals in the horizontal direction of the formwork.

Reference numeral 2.2 indicates horizontal butterfly materials, which are arranged vertically at intervals in a direction perpendicular to the vertical butterfly materials. The vertical butterfly member 1 is formed by stacking single butterfly members 3a and 3b made of channel steel in parallel over a required length, and joining them together using a plurality of connectors 4.4. Further, the horizontal butterfly material 2 is similarly formed by overlapping the ends of single butterfly materials 3a and 3b made of channel steel in parallel over a required length, and joining them together using a plurality of connectors 4.4. ing. And vertical butter material 1
, 1 and the horizontal butterfly members 2.2 are connected at each intersection point with fixing devices 5.5 such as washers, bolts, and nuts. Moreover, for the vertical butterfly material 1.1, a weir plate 6a is provided.

6b is constructed using the fittings 7, 7. In that case, as shown in FIG.
It has a structure in which the formwork is divided into left and right halves in the lateral direction of the formwork with the central part of the spliced part of the bata single materials 3a and 3b as a boundary and joined 8 so as to be able to be separated from each other independently.

Next, the structure of the single batten members 3a and 3b forming the vertical batten material 1.1 and the horizontal batten material 2.2 and their connecting portions will be explained. The configuration of this connecting part is similar to the case of vertical butterfly l as well as horizontal butterfly 2.
The same applies to the case of , as shown in Figures 1 and 4,
The ends of the single pieces 3λ, 3b are overlapped with each other and tightly connected by a pair of spaced connectors 4.4.

Channel steel or light channel steel is used for the bata single materials 3a and 3b. As shown in FIGS. 4 to 8, this Bata single material has predetermined equal intervals along the axis of the Bata single materials 3a and 3b over the entire length or at the end where it overlaps and joins with other Bata single materials. A large number of bolt insertion holes 9.9 are arranged in a row at intervals of P.

As shown in FIGS. 6 and 7, the connector 4 includes a seat 10 having parallel and flat end surfaces 10a, 10a, and an outer surface at the center of both end surfaces 10a, 10b of the seat 10. Stand upright and use the buffing material 3a.

A bolt 12°12 that passes through the bolt insertion hole 9 of 3b,
It consists of a nut 13.13 which is screwed onto this bolt 12.12.

The buffing materials 3a and 3b are connected using a plurality of the above-mentioned connecting tools 4. That is, as shown in FIGS. 4 to 6, the ends of the buffing materials 3a and 3b to be connected are overlapped with each other, and two connectors 4.4 are arranged at intervals in the overlapped part, and each Insert the bolts 12 and 12 protruding on both sides of the connectors 4 and 4 into the bolt insertion holes 9 and 9 of both butterfly materials 3a and 3b, respectively,
The nuts 13 and 13 are screwed together and tightened. Thereby, both the butterfly members 3a, 3b are connected to the seat body 1 of the connectors 4, 4.
0 flat surface 10a.

10a and the tightening surface of the nut 13.13 to be clamped and fixed. The length of the buffing material resulting from the combination can be adjusted by changing the length of the overlapping buffing materials 3a and 3b, and the adjustment can be increased or decreased in units of the interval P between the bolt insertion holes 9.9. Incidentally, if the overlapping portion of the buffing materials 3a, 3b becomes long, another connecting tool can be arranged between the two connecting tools 4, 4 for tightening. Further, when tightening the nut 13, although not shown, a washer may be interposed between the nut 13 and the buff material 31.3b.

FIG. 9 shows another embodiment of the buffing material 3a (3b), in which a distance p is set between the bolt insertion holes 9 and 9 in the terminal part, which is 1/2 of the distance P between them. Furthermore, bolt insertion holes 9° and 9° are provided. When using these buffing materials 3a and 3b, the fixed points by both connectors 4.4 should be
By selecting one of the three holes 9.9° and 9 with the interval p of 2, the joint length of the buffing materials 3a and 3b can be finely adjusted in units of the interval p of 1/2. It turns out.

Fig. 1θ shows still another embodiment of the buffing material 3a (3b), in which two bolt insertion holes 9, 9 at the end portion with a distance of P are connected to form a long hole of 9°. It is something. The buffing materials 3a and 3b are connected by inserting one bolt 12 of each connector 4.4 into the elongated hole 9° and inserting the other bolt 12 into the normal bolt insertion hole 9. In this case, the combined length of the buffing materials 3a and 3b can be adjusted steplessly.

Further, Fig. 1+ shows still another embodiment of the buffing material 3a (3b), in which the long holes 9° are arranged in rows at intervals of P. In such buffing materials 3a, 3b, the bonding length can be adjusted steplessly.

Note that the buffing materials 3a (3b) according to each of the above embodiments can be used in various combinations.

Furthermore, FIGS. 12 and 13 show another embodiment of the connector 4, which includes a seat body 10' having a bolt passage hole 11 in the center, this bolt passage hole 11, and a buff material. 3a, 3b
It consists of a bolt 12° that passes through the bolt insertion hole 9 and a nut 13° that is screwed into the bolt 12°. Both end surfaces 10a, 10a of the seat body, which are orthogonal to the bolt passage hole 11, are formed into mutually parallel flat surfaces.

When using this connector 4, insert the bolt 12° from the bolt insertion hole 9 of one buff material to the bolt passage hole 11 of the seat body. Then, it is passed through the bolt insertion hole 9 of the other buffing material, and tightened by screwing the nut 13 degrees.

In the formwork of the present invention, each vertical butterfly material 1. 1 and the horizontal butterfly material 29.2 are each a single butterfly material 3a.

3b are connected by connectors 4, 4, and the weir plates 6a, 6b are separably attached to the buffing material at the connecting portion of the buffing material. Therefore, for example, the nut 13.1 of the connector 4.4 of the transverse flap member 2°2 in FIG.
If 3 is removed and the connection by connector 4.4 is released,
As shown in FIG. 2, the formwork is separated into a formwork part A having a weir plate 6a and a formwork part B having a weir plate 6b. Then, as shown in FIG.
B are joined, the separated butterfly materials 3a, 3b are overlapped with each other, and are connected again by the connectors 4, 4, and the adjustment sheath plate 15 is fixed to the butterfly materials 3a, 3b by the fixture 14. As a result, the original horizontal length 12 (see Figure 1) of the formwork is changed to a third horizontal length that is wider by the adjustment sheath plate I5.
(see figure). In addition, on the other hand, it is possible to initially make a long formwork as shown in Fig. 3 and then change it to a short formwork as shown in Fig. 1 later. Furthermore, as shown in FIG. 2, the molds can be separated and used as separate molds. In that case, the horizontal length of the formwork will be halved.

Such adjustment of the size of the mold can be performed not only in the length direction of the mold as described above, but also in the width direction (vertical direction) of the mold.

Also, as shown in Figures 1 to 3, vertical butterfly material 1. If both the l and horizontal butter material 2.2 are formed by connecting the single butter materials 3a and 3b, the size of the formwork can be adjusted in both the length and width directions. . In addition, if the size of the formwork needs to be adjusted only in the length direction or width direction, it is also possible to make only one of the vertical butterfly material 1 or the horizontal butterfly material 2 have a connected structure that allows the length to be adjusted. No problem.

(Effects of the Invention) As explained above, the concrete formwork of the present invention uses both or one of the vertical and horizontal batting materials by overlapping the ends of the two single batting materials in parallel. are connected with a plurality of connectors to form a length-adjustable bata material, and the weir plates are each divided into two parts with the joining point of the bata materials as a boundary, and each part is erected separately on a single bata material. Since adjustable shedding plates can be inserted between the plates, the size of the formwork can be adjusted freely. Moreover, since Bata material is formed in a structure in which the overlapping parts of Bata single materials are integrally connected by a connecting tool through bolt insertion holes formed in Bata single materials, it has sufficient strength as a beam material for formwork. In addition to being able to maintain rigidity, the length can be freely and easily adjusted, and the weir plates are each independently erected to the single bata material to be joined, and the shear plates can be adjusted together. Since it is possible to separate the joint part of the single Bata material, it is easy to insert an adjustable weir plate between the weir plates, and the formwork can be made larger in both the length direction and the width direction. It is possible to provide a strong formwork in which the height can be freely adjusted and the strength of the adjustable portion is not impaired.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a front view showing the formwork separated, Fig. 3 is a front view showing the state where the adjustment shear plate is inserted, Fig. 4 5 is an enlarged front sectional view showing the connecting part of the butter material, FIG. 5 is a plan view of the same, FIG. 6 is a sectional view of the same side, FIG. 9, FIG. 10, and FIG. 1I are respectively plan views showing other embodiments of the butterfly material, and FIG. 13
The figure is an exploded side sectional view. ■...Vertical butterfly material 2...Horizontal butterfly material 3a, 3b...
・Bata single material 4... Connectors 6a, 6b... Weir plate 9... Bolt insertion hole 10... Seat body 12...
・Bolt 13...Nabuto 15...Adjustable shelving plate Patent applicant Okabe Co., Ltd. (and one other person) Representative patent attorney Shigeru Ue Matsu Figure 1, Figure 2, Figure 3, Figure 13

Claims (1)

[Claims] Both vertical and horizontal batten materials or either one of them are overlapped in parallel at the ends of two batten single materials with many bolt insertion holes arranged at equal intervals, and the bolts and nuts are mutually attached to the seat body. Using a plurality of connectors, the bolts are passed through the bolt insertion holes of the single Bata material and tightened with nuts to form a Bata material whose length can be adjusted freely, and the weir plate is connected to the Bata material. A concrete formwork whose size can be adjusted, characterized in that it is divided into two parts using a boundary and erected separately on a single piece of bata, and adjustable weir plates can be freely inserted between the weir plates.