JPH0967930A - Fixedly holding device for formwork reentrant part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an assembling work of reentrant part of a concrete formwork made of synthetic resin easily and quickly by mounting a binding tool in binding tool inserting holes through an opening for binding work provided on a reentrant part pillar. SOLUTION: A reentrant part pillar 1 constituted of a metallic hollow body of square tubular cross section is provided with a plurality of openings 5, 5 for binding work at regular intervals in the lengthwise direction along a ridge line part 4 crossing a pair of adjoining side walls 2, 3 contacted with a pair of end faces of the reentrant part of a concrete formwork. Binding tool inserting holes 6... are provided on a pair of the side walls 2, 3 in the vicinity of the opening 5. A binding tool is mounted in the binding tool inserting holes 6 through the opening 5 for binding work, and hence the reentrant part of the formwork is fixedly held with the reentrant part pillar 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing and holding a corner of a mold suitable for fixing the corner of the mold when assembling a concrete mold, particularly a concrete mold made of synthetic resin. .

[0002]

2. Description of the Related Art Conventionally, a synthetic resin concrete formwork has been partially used instead of a wooden concrete formwork. The synthetic resin concrete formwork usually has a structure in which reinforcing ribs and side plates are arranged in a lattice on the back surface of the frame plate.

[0003]

By the way, when assembling a wooden concrete formwork, it is possible to fix it by nailing and joining it directly to the concrete formwork on site or by using an appropriate auxiliary tool. However, in the case of concrete formwork made of synthetic resin, not only is nailing and joining difficult, as is the case with wooden concrete formwork, but even if assembled by nailing and joining, the formwork is damaged during demolding. There is a problem that the ratio is high. In particular, it is difficult to assemble the inner corner portion where the end faces of the form are butted at right angles to be joined.

The present invention has been made in view of the above-mentioned problems in the assembling work of the synthetic resin concrete formwork. Especially, the assembling work of the corners of the formwork can be carried out easily and quickly, and It is an object of the present invention to provide a fixing and holding device for a corner portion of a mold which is less likely to be damaged and has a high rate of repeated use.

[0005]

In order to achieve the above object, a fixing and holding device for corners of a mold according to the present invention comprises a metal hollow body having a rectangular cross section and a pair of concrete molds. A plurality of binding work openings are provided at regular intervals in the longitudinal direction along a ridge line portion where a pair of adjacent side walls that abut the end portions of the corners of the frame are adjacent to each other, and the vicinity of the openings. In the entry corner struts in which binding tool insertion holes are provided in the pair of side walls, and in the binding tool insertion holes through the binding operation opening, the entry corners of the formwork are used as the entry corner struts. It is characterized in that it is provided with a binding tool that is fixedly held.

The pair of side walls adjacent to each other of the entry corner post are formed to have a thin groove having a recessed groove portion in the central portion thereof, leaving both side edge portions with which the end faces of the entry corner of the mold abut. It is advantageous not only to reduce the weight but also to work, that the ridge line portion where the binding operation opening is provided is also thin.

Further, as for the above-mentioned entry corner support, several types having different lengths are prepared, and a plurality of supports are connected through a joint block fitted to the opening end of each support, whereby a desired support is obtained. A strut of length can be easily obtained. Further, by adding a short auxiliary strut, a slight length adjustment is possible.

On the other hand, various fasteners such as the fasteners, U-shaped fittings, U-shaped fittings, or wedges that are fitted in the fastener insertion holes of the corner support can be used, but the workability is improved. From this point of view, it is desirable that the structure be as simple as possible to attach and detach.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an entrance corner strut 1 which is a main part of a fixing and holding device for a corner entrance of a mold according to the present invention. A pair of adjacent side walls 2 of the entrance corner strut 1 are shown. The end faces of the inner corners of a pair of concrete formwork, which will be described later, are brought into contact with 3 to be fixedly held. The inner corner support 1 is made of aluminum alloy and has a rectangular cross section (92 mm x 92 m).
m) A plurality of openings for binding work are formed along the ridge line portion 4 formed by the hollow body and having a pair of adjacent side walls 2 and 3 for contacting the end faces of the corners of a pair of concrete forms to be described later intersect. 5 are provided at regular intervals in the longitudinal direction (for example, 150 mm). The opening 5 has a width of 20 mm and a length of 100
have mm. Further, near the center position of each opening 5, a binding tool insertion hole 6 is provided in the pair of side walls 2 and 3. The binding tool insertion holes 6 have a diameter of 12 mm and have the same pitch (150 mm) as the binding work openings 5.

As shown in FIG. 2, the pair of side walls 2 and 3 are formed in a central portion of the concrete formwork except for both side edge portions 2a, 2a and 3a, 3a of which the end faces of the corners of the concrete form contact. It is formed to be thin with the groove portion 7. With such a shape, the degree of contact with the inner corner end surface of the mold is increased and the weight is reduced. Opening 5
The ridge line portion 4 in which is provided is also thinly formed, and by making the ridge line portion 4 thin, the opening 5 is easily processed and the weight is reduced.

The entry corner column 1 having the above structure has, for example, a total length of 900 mm, 1200 mm, 1500 mm, 1800 mm.
4 are mass-produced as standard products, and as shown in FIG.
1'is connected so that it can be used by extending it to a desired length. The joint block 10 is made of wooden lumber, and is fitted to the lower end opening 1b of the one corner support column 1 to be connected in a partially projected posture, and is fixed by the nail 9. Then, the projecting portion 10a of the joint block 10 is fitted into the upper end opening portion 1a of the other entry corner support 1 ', so that both entry corner supports 1, 1'are connected. In order to fit and fix the joint block 10 to the entry corner post 1, two nail holes 8 are provided in the groove 7 of the upper end opening 1a and the lower end opening 1b of each entry corner post 1, respectively. The joint block 10 can be fitted and fixed in any of the openings 1a and 1b.

Further, as shown in FIG. 7, by using a short auxiliary strut 11 having the same cross-sectional shape as the entry corner strut 1,
The total length of the corner support column 1 can be adjusted by a slight length. The auxiliary column 11 is the joint block 1 described above.
It is fitted and fixed to the upper end opening 1 a of the entry corner column 1 through 0. The auxiliary column 11 may be a synthetic resin molded product instead of the aluminum alloy.

FIG. 3 shows a concrete mold 15 made of synthetic resin used in the device of the present invention. Reinforcing ribs 17 are projected on the back surface of the frame plate 16 in a grid pattern, and Side plates 18 surrounding the four sides are projected, and insertion holes 19 corresponding to the binding tool insertion holes 6 of the entry corner post 1 are provided in each side plate 18 at the same pitch as the binding tool insertion holes 6.

FIG. 4 and FIG. 5 show an example of construction in which the entry corner of a concrete formwork is assembled using the entry corner strut 1 according to the present invention. As shown in FIG. 6 which shows the enlargement of the A part of FIG. 5, the two corner entry columns 1, 1 are connected via the joint block 10 and the upper corner of the upper corner column column 1 As described above with reference to FIG. 7 showing the enlargement of the B part of 5, the auxiliary column 11 is fitted through the joint block 10 and the total length is set to a predetermined length. A buffer material 12 is provided on the upper end of the auxiliary column 11 to facilitate demolding after placing concrete, and a beam bottom or slab veneer board 14 is provided on the buffer material 12 via a styro protection veneer board 13. Is installed.

On the other hand, in FIG. 8 showing the enlargement of the C portion of FIG.
The state where the synthetic resin concrete formwork 15 and the wooden concrete formwork 20 are brought into contact with each other and the end faces of the corners are brought into contact with each other and fixedly held by the binding tools 21 and 22 is shown. Further, in FIG. 9 showing an enlargement of the D portion of FIG. 5, a side plate 18 which is an end surface of the corner portion of the synthetic resin concrete formwork 15 is attached to the side wall 3 of the corner portion pillar 1 by using a binding tool 23 of another form. Is abutted and fixedly held.

As shown in FIG. 10, the binding tool 21 has a support arm 21c on one holding piece 21b of a U-shaped metal fitting 21a.
Is projectingly provided, and the pivot pin 21 is provided at the end of the support arm 21c.
d has a structure in which it is fixedly protruded, and as shown in FIG. 8, the pivot pin 21d is inserted into the insertion hole 19 provided in the side plate 18 of the synthetic resin mold 15 and the side wall of the entry corner post 1. 3 is inserted through the binding tool insertion hole 6 and the U-shaped metal fitting 21a is rotated through the binding work opening 5 with the pivot support pin 21d as a fulcrum. It is designed to be sandwiched between and fixedly held.

As shown in FIG. 11, the binding tool 22 has a locking projection that engages with the binding tool insertion hole 6 of the corner support 1 on one of the sandwiching pieces 22b, 22b of the U-shaped metal fitting 22a that face each other. Two
2C is provided, and the stop bolt 22d is provided on the other side.
Is screwed, and as shown in FIG. 8, the locking projection 22c
Is engaged with the insertion hole 6 provided in the side wall 2 of the entry corner support 1, and the set bolt 22d is screwed to fix the entry corner of the wooden concrete formwork 20 against the side wall 2. It is to hold and wooden concrete formwork 20
It is a binding tool suitable for fixing and holding the entry corner portion of the entry corner portion on the entry corner portion column 1.

The binding 23 is similar to the binding 21 in the corner of the synthetic resin concrete form 15, that is, the side plate 18.
Is used for fixing and holding to the side wall 3 of the inner corner post 1, and as shown in FIG. 12, a wedge body 23a formed by bending a metal plate into a U-shaped cross section and a head portion at the rear end. It has a headed pin 23b. The wedge body 23a has an engagement hole 23c extending in the longitudinal direction and a wide guide hole 23d continuously provided at one end of the locking hole 23c. on the other hand,
The headed pin 23b has a locking head portion 23e that is inserted into the guide hole 23d at the tip portion and a narrowed portion 23f that slidably engages along the locking hole 23 and is shown in FIG. The headed pin 23b to the synthetic resin concrete formwork 1
5, the insertion hole 19 provided in the side plate 18 and the entry corner support 1
Wedge body 23 inserted through the binding tool insertion hole 6 provided in the side wall 3 of the
The guide hole 23d of “a” is fitted to the locking head 23e at the tip of the headed locking pin 23b, and the narrowed portion 23f is engaged with the engaging hole 23c.
By sliding the wedge body 23a in the engaged state, the side wall 3 and the side plate 18 are fixedly held by the wedge effect.

In the above-mentioned embodiment, the synthetic resin mold 15 and the wooden mold 2 are used as concrete molds forming the corners.
An example using 0 was shown, but both are made of synthetic resin mold 15
It may be. Alternatively, both may be wooden formwork 20.

[0021]

As described above, according to the present invention,
It consists of a hollow metal body with a rectangular cross-section and a plurality of binding openings along the ridge line where a pair of adjacent side walls that abut the end faces of the corners of a pair of concrete forms intersect. Are provided at regular intervals in the longitudinal direction, and are fitted in the binding tool insertion holes through the openings, and the entry corner struts in which the binding tool insertion holes are provided in the pair of side walls in the vicinity of the openings. It is especially easy to assemble the entry corners of synthetic resin concrete formwork using
And it can be done quickly. Moreover, since the conventional nailing joint is not used, the synthetic resin concrete formwork is less likely to be damaged, and the repeated usage rate can be greatly increased.

According to the second aspect of the present invention, the pair of side walls adjacent to each other of the corner support post has a concave groove portion in the central portion thereof except for both side edge portions with which the end faces of the corner corners of the mold abut. Since it is formed to have a thin wall, the degree of close contact with the end faces of the corners of the mold is increased, and it is possible to reliably prevent spillage when pouring concrete. In addition, the weight of the supporting column at the corners can be reduced to facilitate handling, and the cost can be reduced.

Further, by using the binding tool according to the seventh to ninth aspects, it is possible to securely fix and hold the entry corner portion of the mold with the entry corner portion support by a simple operation.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an entry corner post according to the present invention.

FIG. 2 is an enlarged horizontal cross-sectional plan view of the same corner post.

FIG. 3 is a rear view of a concrete mold made of synthetic resin according to the present invention.

FIG. 4 is a schematic plan view showing a construction example of a corner portion of a concrete formwork using the corner portion support according to the present invention.

FIG. 5 is a schematic front view showing an example of construction of a concrete formwork corner part using the corner part support according to the present invention.

FIG. 6 is a partially cutaway front view showing an enlargement of part A of FIG.

FIG. 7 is a partially cutaway front view showing an enlargement of part B of FIG.

FIG. 8 is a cross-sectional plan view showing enlargement of a C portion of FIG.

FIG. 9 is a front view showing an enlargement of a D part of FIG.

FIG. 10 is a perspective view of a binding device according to the present invention.

FIG. 11 is a perspective view of a binding device according to the present invention.

FIG. 12 is a perspective view of a binding device according to the present invention.

[Explanation of symbols]

 1 Entry Corner Prop 2,3 Pairs of Side Walls 4 Ridge Line 5 Opening for Tightening Work 6 Tightening Tool Insertion Hole 7 Recessed Groove 10 Joint Block 11 Auxiliary Post 15 Synthetic Resin Concrete Formwork 18 Side Plate 19 Insertion Hole 20 Wooden Concrete Formwork 21-23 bindings

Claims (9)

[Claims] 1. A ridge line portion formed by a hollow metal body having a rectangular cross-sectional shape and having a pair of adjacent side walls (2, 3) that abut the end faces of the corners of a pair of concrete forms. A plurality of binding work openings (5) are provided along the (4) at regular intervals in the longitudinal direction, and are bound to the pair of side walls (2, 3) near the opening (5). Corner support column (1) provided with tool insertion hole (6)
And a binding tool (21-23) which is mounted in the binding tool insertion hole (6) through the binding work opening (5) to fix and hold the entry corner of the mold on the entry corner column (1). A holding device for a corner portion of a formwork, comprising: 2. A ridge line portion formed by a hollow metal body having a rectangular cross-sectional shape and having a pair of adjacent side walls (2, 3) that abut the end faces of the corners of the concrete formwork. A plurality of binding work openings (5) are provided along the (4) at regular intervals in the longitudinal direction, and are bound to the pair of side walls (2, 3) near the opening (5). An entry corner column (1) provided with a tool insertion hole (6), wherein the pair of side walls (2, 3) leave both side edge portions with which the entry corner end faces of the mold abut. An entry corner post formed thinly having a groove (7) in the central portion. 3. A ridge line portion which is made of a metal hollow body having a rectangular cross-section and has a pair of adjacent side walls (2, 3) which abut the end faces of the corners of the concrete formwork. A plurality of binding work openings (5) are provided along the (4) at regular intervals in the longitudinal direction, and are bound to the pair of side walls (2, 3) near the opening (5). An entrance corner column (1) provided with a tool insertion hole (6), in which a protrusion of a joint block (10) fitted and fixed to a lower end opening of the entry corner column (1) is separated. 2. The entry corner column strut (1 ') constructed so that both entry corner columns (1, 1') can be connected by detachably fitting to the upper end opening of the entry corner column (1 '). 4. A ridge line portion which is made of a hollow metal body having a rectangular cross-sectional shape and which has a pair of adjacent side walls (2, 3) that abut the end faces of the corners of the concrete formwork. A plurality of binding work openings (5) are provided along the (4) at regular intervals in the longitudinal direction, and are bound to the pair of side walls (2, 3) near the opening (5). The entry corner column (1) provided with the tool insertion hole (6), the short auxiliary column (11) having the same cross-sectional shape as the entry corner column (1) is the entry corner part. An entering corner support which is detachably fitted and joined to the upper end opening of the support (1). 5. A ridge portion formed by a hollow metal body having a rectangular cross-section and having a pair of adjacent side walls (2, 3) that abut the end faces of the corners of the concrete formwork. A plurality of binding work openings (5) are provided along the (4) at regular intervals in the longitudinal direction, and are bound to the pair of side walls (2, 3) near the opening (5). An entry corner column (1) provided with a tool insertion hole (6), wherein the ridge (4) is formed thin. 6. The concrete formwork according to any one of claims 1 to 5, wherein the concrete formwork is made of synthetic resin, and the binding tool insertion hole (6) is provided on the side plate of the concrete corner form support column (1).
A synthetic resin concrete formwork provided with an insertion hole (19) corresponding to. 7. One clamping piece (21b) of a U-shaped metal fitting (21a) for clamping and holding the side wall (18) of the concrete corner frame and the side wall of the entry corner support (1).
7. A synthetic resin concrete formwork (15) according to claim 6, wherein a support arm (21c) is projectingly provided on the support arm (21c), and the binding tool insertion hole (6) of the entry corner post (1) and the support arm (21c). A fastening tool to which a pivot pin (21d) inserted through the insertion hole (19) is fixed. 8. A locking projection (22c) that engages with a binding tool insertion hole (6) of the corner support (1) on one of the sandwiching pieces 822b, 22b of the U-shaped metal fitting (22a) facing each other. ) Is provided, and the fastening bolt (22d) is screwed to the other side. 9. A pin with a head that is inserted through the binding tool insertion hole (6) of the entry corner support (1) and the insertion hole (19) of the synthetic resin concrete formwork (15) according to claim 6. (23b) and the headed pin (23b) can be freely attached and detached,
And a binding tool which is slidably assembled and is constituted by a wedge body (23a).