JP3114179U - Concrete formwork corner fastening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corner fastening device for a concrete formwork at a construction site or the like, and in particular, use a dedicated corner fastening device for corner fastening of a concrete formwork so as not to impose a burden on an operator and to save work time. It is an object of the present invention to provide a corner fastening device for a concrete mold to be shortened.
The present invention has a configuration in which a corner fastening operation of a concrete mold can be easily performed using a dedicated corner fastening device and using an electric tool. In other words, a chain is placed around the corner of the concrete formwork, a pulling material is erected on the corner of the concrete formwork, and is attached to the corner tightening device by sliding contact with the pulling material. The bolt is rotated, the drive member is opened, and the chain is fastened.
[Selection] Figure 1

Description

  The present invention relates to a corner fastening device for a concrete formwork at a construction site or the like.

  Today, there are an increasing number of reinforced concrete buildings that are more earthquake resistant and have a longer service life than wooden structures. The structure of reinforced concrete (RC structure) is a structure in which the concrete and the reinforcing bar are integrated. The concrete is strong against compression and the reinforcing bar is strong against tension, and takes advantage of the characteristics of both.

  In such a reinforced concrete building, rebars are assembled, a concrete formwork is made with a formwork panel made of plywood, and concrete (so-called ready-mixed concrete) is poured into this to build a frame. Usually, after assembling the formwork, the corners of the formwork are reinforced with chains. This is to prevent the mold from spreading outward due to the weight of the concrete when the concrete is poured into the mold.

  Conventionally, the corners are tightened by a chain using a turnbuckle. For example, a chain hung on a corner of a concrete formwork is hung on a hook of a turnbuckle, and the chain is tightened by rotating while gripping the gripping portion.

Patent Document 1 discloses an invention in which an insert is embedded in a screw hole formed in a concrete product and two concrete products are connected by a turnbuckle.
JP 2003-239392 A

  However, in the above conventional method, it is necessary to manually turn the turnbuckle to tighten the chain. The work of tightening the turnbuckle is a work that requires force, and many turnbuckles are used for the concrete formwork, which places a heavy burden on the operator. In the case of Patent Document 1 described above, since the two concrete products are connected, it is necessary to manually turn the turnbuckle, which places a heavy burden on the operator.

  Therefore, the present invention provides a concrete mold corner-clamping device that uses a dedicated corner-clamping device for corner-clamping of a concrete formwork, and does not place a burden on the operator and reduces the work time. .

  According to the present invention, the above-described problem is achieved by the sliding contact means for sliding contact with the pulling material, the bolt means whose tip is in contact with the sliding contact means and having a spiral formed on the peripheral surface, and the peripheral surface of the bolt means. A concrete mold corner-clamping device having a driving means that is screwed into the spiral and moves away from the sliding contact means according to the rotation of the bolt means, and an electric driving means that rotates the bolt means. Can be achieved by providing.

  Further, one end of the sliding contact means and the driving means is slidably attached by a support member. For example, a chain for corner tightening of the concrete mold is slid on the outer peripheral surface of the driving means.

  The sliding contact means is configured to be in sliding contact with, for example, a round pipe-shaped pulling material, and the sliding contact means is configured to be in sliding contact with, for example, a square pipe-shaped passing material.

  Further, on the inner peripheral surface of the sliding contact means, for example, a protrusion that penetrates into a hole formed in the pulling material is provided upright. The electric driving means is provided with covering means corresponding to the head shape of the bolt.

  Furthermore, the end of the chain is fixed to a separator attached to the concrete formwork, for example.

  According to the present invention, the corner fastening operation of the concrete mold can be facilitated, and even an operator with little experience can easily perform the corner fastening operation of the mold.

  In addition, the amount of chain usage can be reduced compared to the conventional case.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a concrete formwork to which the corner fastening device of this embodiment is applied. FIG. 2 is a view of the concrete form shown in FIG. 1 as viewed from above. In both figures, 1 is an outer formwork panel and 2 is an inner formwork panel. A separator 22 is disposed between the outer formwork panel 1 and the inner formwork panel 2 and is formed in a space 3 having a constant width. Note that concrete (so-called raw concrete) is poured into the space 3.

  Both figures show in particular the corners of the concrete formwork, the outer formwork panel 1 being composed of 1a and 1b, the outer formwork panel 1a being held on the sides by four round pipes 4a to 7a, The panel 1b is held on its side by four round pipes 4b to 7b. Here, the round pipes 4a and 5a, 6a and 7a are each paired, and the outer formwork panel 1a is supported from the side, and the round pipes 4b and 5b, 6b and 7b are each paired, and the outer formwork panel 1b is placed on the side. Support from.

  As for the outer formwork panel 2, as with the outer formwork panel 1, the inner formwork panel 2 is composed of 2a and 2b, and the inner formwork panel 2a is also supported on its side by four pipes. The inner formwork panel 2b is also supported on its side by four round pipes. However, FIG. 2 shows only the uppermost round pipe 9 (9a, 9b).

  The separator 22 is fixed to the inner round pipe and the outer round pipe with nuts 23 and 24. FIG. 3 is a detailed view showing the state of the form panels 1 (1a) and 2 (2a) fixed by the separator 22. FIG.

  On the other hand, as shown in FIG. 1, a pulling material 10 is erected at the corner of the concrete formwork. Chains 11 a and 11 b are wound around the pulling material 10 in the vertical direction. The chains 11a and 11b have a corner fastening function when concrete is poured into the concrete formwork. Further, both ends of the chains 11a and 11b are stretched over the separator 22 described above. Further, a corner tightening device 13 is attached to the rubbing portion 12a between the chain 11a and the pulling material 10, and a corner tightening device 14 is attached to the rubbing portion 12b between the chain 11b and the pulling material 10. The mold clamping devices 13 and 14 have the same configuration.

  FIG. 4 is a diagram showing an external configuration of the mold clamping device 13 (14). The mold clamping device 13 (14) includes a slidable contact member 15 that is slidably contacted with the outer periphery of the pulling member 10 and a drive member 16 that opens in the direction of arrow a with the support portion 19 as a fulcrum. Further, the opening of the drive member 16 in the direction of arrow a is performed by rotating a bolt 17 having one end in contact with the sliding contact member 15 with a nut 18 interposed therebetween.

  For example, by rotating the bolt 17 in the direction of arrow b, the drive member 16 moves the nut 18 to the head of the bolt 17 and gradually opens the drive member 16 in the direction of arrow a. FIG. 5 is a view of the mold clamping device 13 (14) as viewed from above. By rotating the bolt 17, the drive member 16 opens in the direction of arrow a. Therefore, for example, the above-mentioned chain is passed over the A portion shown in FIG. 4 and the bolt 17 is rotated, so that the drive member 16 opens in the direction of arrow a, and the concrete formwork can be corner-tightened by the chain.

  FIG. 6 is a diagram for explaining this configuration. The above-mentioned chains 11a and 11b are passed over the corners of the concrete formwork through the pulling material 10, and slid onto the A portion of the corner fastening devices 13 and 14 attached to the pulling material 10 standing on the corners. Rubbing. In this state, by rotating the bolt 17 described above, the drive member 16 opens in the direction of the arrow a described above, and the concrete formwork is angularly clamped by the chains 11a and 11b.

  Further, the bolt 17 is rotated by a special electric tool. FIG. 7 shows a state where the bolt 17 of the corner fastening device 13 (14) is rotated. The electric tool 20 has a configuration in which a metal fitting 21 corresponding to the shape of the head of the bolt 17 described above is attached to the tip, and the bolt 17 is rotated when the electric tool 20 is driven. Therefore, it is not necessary to use a turnbuckle for corner tightening of the chains 11a and 11b as in the prior art, and the bolt 17 can be easily rotated to corner tighten the concrete formwork.

  In the description of the above embodiment, the pulling member 10 has a pipe shape, but a pulling member having a quadrangular cross section may be used. In such a case, the square fastening device shown in FIG. 8 is used. In this case, the slidable contact member 15 is also rectangular, and has a shape that can be stably held even when the tip 19 ′ of the bolt 17 abuts against the corner of the slidable contact member 15.

  FIG. 9 shows a configuration for facilitating the attachment when the mold clamping device 13 (14) is attached to the pulling member 10. That is, the projections 26 and 27 are erected on the inner side of the sliding contact member 15, penetrated into a hole (not shown) provided in the pulling member 10, and the corner fastening device 13 (14) is held in the pulling member 10. It is. With this configuration, the operator does not need to support the corner tightening device 13 (14) when performing the corner tightening operation, and more easily operates the electric tool 20 to fasten the chains 11a and 11b. Can do.

  Further, in this case, the hole formed in the pulling material 10 is formed into a long long hole, and a groove 28 shown in FIG. 9 is provided in a part of the projections 26 and 27, and the groove 28 is formed into a long hole in the pulling material 10. It is set as the structure fitted in. By comprising in this way, it becomes possible to work by fixing the mold clamping device 13 (14) to the pulling member 10. FIG. 10 shows the structure of the pulling material 10 in this case, and a long hole 34 is provided in the pulling material 10.

  Further, FIG. 11 shows an example in which the corner fastening device of this example is applied to the end portion of the concrete formwork in order to prevent the end portion of the concrete formwork from spreading. In addition, Fig.11 (a) is a side view of a concrete formwork, The same figure (b) is the top view. As shown in both figures, the chain fastening device 31 is attached in sliding contact with the pulling member 30, and the chain 32 wound around the end of the concrete mold can be fastened by operating in the same manner as described above. it can.

It is a perspective view of the concrete formwork to which the corner fastening device of this embodiment is applied. It is the figure which looked at the concrete formwork of Drawing 1 from the upper part. It is detail drawing which shows the state of the formwork panel fixed with the separator. It is a figure which shows the external appearance structure of a mold-clamping apparatus. It is the figure which looked at the corner fastening apparatus from the upper part. It is a figure which shows the state which a drive member opens in the arrow a direction by rotating a volt | bolt, and a concrete formwork is square-tightened with a chain. It is a figure which shows the state which utilizes a corner fastening apparatus with an electric tool. It is a figure which shows the modification of a corner fastening apparatus. It is a figure which shows the modification of a corner fastening apparatus. It is a figure which shows the structure of a passing material. It is a figure which shows the example which applies a corner fastening apparatus to the edge part of a concrete formwork.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Outer formwork panel 2, 2a, 2b ... Inner formwork panel 3 ... Space 4a, 5a, 6a, 7a ... Round pipe 4b, 5b, 6b, 7b ... Round pipe 9, 9a, 9b ... Round pipe 10 ... Through material 11a, 11b ... Chain 12a, 12b ... Sliding contact part 13,14 ... Square tightening device 15 ... · Sliding contact member 16 ··· Drive member 17 ··· Bolt 18 ··· Nut 19 ··· Supporting portion 20 ··· Electric tool 21 ··· Metal fitting 22 ··· Separator 26 and 27 ··· Projection 28 ... Groove 30 ... Pulling material 31 ... Square tightening device 32 ... Chain 34 ... Elongated hole

Claims (7)

Sliding contact means for sliding contact with the pulling material;
A bolt means having a tip abutting on the sliding contact means and a spiral formed on the peripheral surface;
A drive unit that is screwed into a spiral formed on a peripheral surface of the bolt unit and moves away from the sliding contact unit according to the rotation of the bolt unit;
Electric drive means for rotating the bolt means;
A corner-clamping device for a concrete mold, characterized by comprising: 2. The sliding contact means and one end of the driving means are slidably attached by a support member, and a chain for corner tightening of the concrete mold is slid on the outer peripheral surface of the driving means. Clamping equipment for concrete formwork. The corner fastening device for a concrete formwork according to claim 1 or 2, wherein the sliding contact means is in sliding contact with a round pipe-shaped pulling material. 3. The concrete mold corner tightening device according to claim 1, wherein the sliding contact means is in sliding contact with a square pipe-shaped pulling material. The concrete formwork according to claim 1, 2, 3, or 4, wherein a projection that penetrates into a hole formed in the pulling material is provided on an inner peripheral surface of the sliding contact means. Corner tightening device. 6. The concrete form corner fastening according to claim 1, wherein covering means corresponding to a head shape of the bolt means is attached to the electric drive means. apparatus. The corner fastening device for a concrete mold according to claim 1, 2, 3, 4, 5, or 6, wherein an end of the chain is fixed to a separator attached to the concrete mold.

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