JP2987725B2 - Backup material for shoring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a unit-type unit which is used for receiving a concrete injection pressure, for example, by being addressed to a back surface of a formwork plate constituting a concrete casting formwork. It relates to backup material for shoring.

[0002]

2. Description of the Related Art A conventional method for constructing a formwork for casting a wall of a reinforced concrete building will be described with reference to FIGS. 11 and 12. Referring to FIGS. In order to form the space S in which the wall is to be formed by being arranged facing each other at a predetermined interval,
Is fixed in this arrangement. In order to do this, a steel rod separator 31 as an opposing spacing holder is penetrated between the facing form plates 30, 30, and the concrete injection pressure is received on the back surfaces of the form plates 30, 30. A plurality of square steel pipes 32 are arranged vertically and horizontally at a small interval as shown in FIG. 12 and along the separator 31. Then, a wedge 35 is driven into a wedge hole of a home tie (fastening fitting) 33 screwed to each end of the separator 31 through a washer, and each square steel pipe 32 is pressed against the back surface of the form plate 30 by a method. Was.

[0003]

In the above-mentioned conventional support method, the arrangement interval of the square steel pipes 32 for supporting the form plate 30 from the back is generally considerably close to the inside and outside of 20 cm.
The required number of square steel pipes 32 per unit supporting area becomes considerable. Therefore, it takes a lot of labor and time to support a large number of heavy square steel pipes 32, and these square steel pipes 3
A certain amount of attention is needed to place the two as evenly spaced as possible. In addition, it takes a lot of money and labor to remove many heavy square steel pipes 32 after use and transport or store them at the next construction site. Therefore, the inventor of the present application has been able to reduce the required number and gross weight as compared with the conventional one as a substitute for the supporting material such as a square steel pipe used for such a use, and perform construction, transportation,
A unit-type collapsible and unfoldable back-up material for supporting construction was constructed to reduce the labor and cost required for storage and the like, and was previously described in Japanese Patent Application No. Hei 2-298613.
No. filed. The present invention is concerned with the improvement of the prior application invention, and the object thereof is to connect a plurality of columnar members and a bridging member to a parallelogram through a connecting member having a hinge portion. In the configuration with a ladder-like structure that can be folded and unfolded as above, the hinge part is prevented from rotating unnecessarily during handling by attaching a rotation resistance member to the connection member. Another object of the present invention is to provide a backup material for a shoring work which is easy to handle.

[0004]

In order to achieve the above-mentioned object, a backing material for a shoring according to the present invention is directed to a back surface of a concrete casting form plate to receive a concrete injection pressure. And a plurality of columnar members 1 having a predetermined length and arranged in parallel at predetermined intervals, and a plurality of columnar members 1 at a plurality of positions in their longitudinal direction. A plurality of bridging members 2 to be connected in a ladder-like manner, and a connecting member 3 having a hinge portion 6 attached to each of the connecting portions of the plurality of columnar members 1 and the bridging member 2. And a rotation resistance member 10 that is attached to the connection portion and generates a rotation resistance in the hinge portion 6. As the columnar member 1 and the bridging member 2, channel materials having the same channel width are used, and the connecting member 3 is formed by bending a rectangular plate into an L shape.
The surface corresponding to the vertical drawing of the character may be fixedly screwed to the end of the bridging member 2, and the hinge portion 6 may be formed at the edge of the surface corresponding to the horizontal drawing. In addition, the rotation resistance member 10 is formed by bending a band-shaped spring material into a U-shape, screwing the U-shaped vertical drawing portion to the end of the bridging member 2, and connecting both horizontal drawing portions. The channel-shaped columnar member 1 may be configured to be brought into pressure contact with the side wall surface so that the rotation resistance is generated.

[0005]

A folding ladder is formed by connecting a plurality of columnar members 1 facing each other in parallel at a predetermined interval by a plurality of bridging members 2 having connecting members 3 attached to both ends thereof. tatami·
The unfoldable unit-type back-up material for the shoring according to the present invention is, for example, at least two steel pipes for the conventional shoring as long as they are applied to the back side of the pressure-receiving surface of a concrete casting form plate or the like. The work corresponding to the rear of the form plate and the removal work after use can be performed extremely simply and quickly. When not in use, each bridging member 2 is rotated around the hinge 6 of the connecting member 3 attached to both ends thereof, folded into a parallelogram, and each columnar member 1 and bridging member 2 are separated. In a compact state folded parallel to each other,
Can be transported and stored. In addition, since the rotation resistance member 10 attached to the connecting member 3 exerts rotation resistance on the hinge 6, the hinge 6 is unnecessarily rotated during handling of the backup material, making it difficult to handle. Absent.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the schematic structure of the backup material A of this embodiment is, as shown in FIG. 1, composed of two columnar members 1 and 2 each made of a metal channel material having a predetermined length.
1 are opposed to each other in parallel at a predetermined interval, and a plurality of bridging members 2 are connected in a ladder-like manner at a plurality of locations in their longitudinal direction via connecting members 3 attached to their respective ends. It has a folded shape and can be folded like a parallelogram. A rotation resistance member 10 is attached to each connecting portion between the columnar member 1 and the bridging member 2.

Next, the detailed configuration of the backup material A will be sequentially described. The columnar member 1 of this embodiment is made by extruding an aluminum material, the length is about 150 cm, the width of the channel bottom surface 1a (FIG. 4) is about 6 cm, and the height of the channel side wall 1b is about 2 cm. It is. On both side walls 1b, shaft holes a are provided at a plurality of equally spaced locations along the longitudinal center line (FIG. 1). The channel-like bridging member 2 also made of an extruded aluminum material has a length of about 16 cm.
The bottom surface 2a (FIG. 8) of the channel is about 6 cm in width, and the height of both side walls 2b is about 2 cm. In the middle of the height of the side walls 2b, a ridge 4 having a substantially C-shaped cross section is formed along the entire length of the side wall 2b as shown in FIGS.
Are provided so as to face inward of the channel.
The inner space of the ridge 4 is a screw hole into which the tapping screw 5 is screwed.

As shown in FIG. 8, the connecting member 3 formed by extruding an aluminum material has a shape obtained by bending a rectangular plate into a substantially L-shape, and corresponds to an L-shaped vertical picture. Vertical surface 3a
Has a width of about 6 cm and a height of about 3 cm, and the protruding length of the horizontal surface 3b corresponding to the horizontal drawing is about 1 cm. The vertical surface 3a is opposed to the screw holes of the ridges 4 and 4 with its upper edge aligned with the upper or lower edge of the bridging member 2 and in contact with the end surface of the bridging member 2. Screw holes c through which the tapping screws 5 pass are provided at respective locations. The horizontal surface 3b of the connecting member 3 has a substantially C-shaped cross section along the edge thereof, and a shaft hole 6a.
Is integrally provided with the cutout facing outward.

As shown in FIGS. 1, 7, and 8, the connection member 3 is provided with a rotation resistance member 10 respectively. As shown in FIG. 3, the rotation resistance member 10 has a shape in which a band-shaped spring material is bent in a U-shape. The U-shaped vertical drawing portion has a dimension substantially overlapping the vertical surface 3a of the connecting member 3, and the screw holes 10a, 10a are cut out at locations facing the screw holes c, c provided in the vertical surface 3a. Provided.
The two U-shaped horizontal drawing portions 10b, 10b are formed in a trapezoidal shape, and each of the tip portions 10c, 10c is bent obliquely so as to face each other so as to be easily fitted into the groove of the channel-shaped columnar member 1. I have. Then, in this fitted state, both the horizontal drawing portions 10b are elastically pressed against the channel side walls 1b of the columnar member 1 so that a rotation resistance is generated in the hinge portion 6.

Next, how to assemble the backup material A will be described. First, the connecting members 3 are attached to both ends of each bridging member 2 at opposite ends as shown in FIG. 1, that is, the connecting member 3 on the right side of the drawing The connecting member 3 on the left side of the drawing has its hinge portion 6 protruding toward the upper edge of the channel of the bridging member 2, and the connecting member 3 on the left side of the drawing is provided on each end face of the bridging member 2. Each is fixed using the tapping screw 5 of the book. At the time of this screwing, the turning resistance member 10 is also fixed at the same time in a state of being superimposed on the vertical surface 3a of the connecting member 3 by the tapping screw 5 as shown in FIG. Next, two columnar members 1,
1 are arranged in parallel with each other at an interval corresponding to the length of the bridging member 2, and each bridging member 2 is oriented in a direction orthogonal to the columnar member 1.
Shaft hole 6a of hinge 6 of connecting member 3 attached to both ends of
To the respective shaft holes a of the two columnar members 1 and 1, and a connecting pin 7 is passed through these shaft holes a, 6 a and a, and caulking and other appropriate retaining means are provided at both ends thereof. If you take it, you can assemble a unit-type backup material A that can be folded and unfolded freely.

Next, as in the prior art shown in FIG. 12, the backup material A is used for supporting a formwork for placing a wall of a reinforced concrete structure as an example.
The operation will be described with reference to FIG. Note that members common to FIGS. 12 and 9 are denoted by the same reference numerals. FIG.
As shown in FIG. 9, the backup material A developed as shown in FIG. 9 is a middle part of each of a plurality of formwork plates 30 which are vertically arranged side by side to form a wall placement space. Are sent one by one. Then, the plurality of backup materials A are straddled between the back surfaces of the plurality of backup materials A, and in this case, a plurality of the three square steel pipes 32 are addressed in parallel at predetermined intervals vertically. If the square steel pipe 32 is pressed against the form plate 30 by using the separator 31, the home tie 33, the wedge 35 and the like in the same manner as in the prior art, the support operation is easily completed.

The backup material A takes a form like a ladder in the deployed state of use, so that only one backup material A is addressed to the center of the back of one formwork plate 30. , Two columnar members 1 constituting the backup material A
And a plurality of bridging members 2 arranged in a direction orthogonal to the above, cooperate with each other to reliably receive the concrete injection pressure applied to the entire surface of the form plate 30. After the concrete poured into the form is hardened, the used back-up material A is removed, and if a force for reducing the distance between the two columnar members 1 and 1 is applied, the backup material A is crushed into a parallelogram, As shown by the solid line in FIG. 2, each bridging member 2 is composed of two columnar members 1, 1
It folds into a very compact form that is sandwiched in parallel between them.

As described above, the backup material A which can be folded and unfolded flaps when the hinge 6 is in a state of being rotated lightly and unnecessarily, and the handling becomes extremely inconvenient and wasteful. It will also take effort. However, since the rotation resistance member 10 is assembled to the connecting member 3 provided with the hinge portion 6, the hinge portion 6 has an appropriate rotation resistance that is neither too strong nor too weak. The fluttering can be almost completely eliminated. Then, if the backup material A is folded to make it less bulky, its handling becomes easier, and the transportation cost to the next construction site and the management cost for temporary storage are significantly reduced.

In the above configuration, the material of the columnar member 1 and the bridging member 2 may be a metal other than an aluminum alloy, a synthetic resin, or the like. They may be arranged and connected to each other so as to be connected in a lattice by a plurality of bridging members 2. In this case, it is preferable to use a columnar member 1 arranged at the intermediate portion and having a shape such that two channel members are united back to back. In the case where various types of backup materials A having different widths and lengths or different arrangements of the columnar member 1 and the bridging member 2 are manufactured, a channel material serving as the material is formed. There is no need to prepare many types of molds, and one type of molding die for forming each of the columnar member 1 and the bridging member 2,
Only by preparing a channel material cutting device, one kind of connecting member 3 and a tapping screw 5, respectively, a variety of backup materials having different sizes and shapes can be extremely easily and quickly as required, and It can be made cheaply.
Further, the shape of the connecting member 3 and the connecting structure thereof, and the shape and the assembling method of the rotation resistance member 10 are not limited to those shown in the drawings, and the design may be appropriately changed within a range that embodies the technical idea of the present invention. Even so, the object of the present invention is of course achieved.

[0015]

As is apparent from the above description, the backup material for a shoring according to the present invention can be used for, for example, the shoring of a concrete casting formwork to provide various excellent effects as listed below. As a result, the construction cost and construction period required for the support work can be largely reduced. a) The number of supporting materials such as square steel pipes, which had conventionally been arranged in a grid on the back of the form plate and addressed to them, is simply replaced with a backup material according to the present invention. It can greatly reduce the number of man-hours and labor required for the shoring work. b) Conventionally, the work of arranging support materials such as square steel pipes in a lattice shape requires a certain amount of attention. However, the backup material of the present invention can be addressed by an unskilled person with a relatively rough feeling. But it certainly fulfills its role. c) Since the rotation resistance member for generating the rotation resistance is attached to the hinge part of the connecting member, the hinge part is rotated unnecessarily during handling of the backup material, making it difficult to handle or causing danger. No fear. d) The backup material can be folded into an extremely compact form, which facilitates handling and greatly reduces the cost of transport and storage. e) A columnar member and a bridging member of only one kind each made by extruding an aluminum material or the like, and a cutting device therefor,
By preparing only one type of connecting member, backup materials of various shapes and sizes can be easily, quickly and freely made, so that the manufacturing cost can be kept sufficiently low.

[Brief description of the drawings]

FIG. 1 is a plan view showing a developed state of a backup material according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state where the backup material is folded.

FIG. 3 is a perspective view of the rotation resistance member.

FIG. 4 is a sectional view taken along line WW of FIG. 1;

FIG. 5 is a cross-sectional view taken along the line XX of FIG. 1;

FIG. 6 is a cross-sectional view taken along the line YY of FIG. 2;

FIG. 7 is a sectional view taken along the line ZZ in FIG. 1;

FIG. 8 is a partially exploded perspective view illustrating an assembling structure of the connecting member and the rotation resistance member on the end surface of the bridging member.

FIG. 9 is a front view illustrating the use state of the backup material according to the first embodiment;

FIG. 10 is an end view showing another embodiment of the bridging member.

FIG. 11 is a vertical sectional side view illustrating a conventional state of supporting a concrete casting formwork.

FIG. 12 is a front view of the same.

[Explanation of symbols]

 A Backup material 1 Columnar member 1a Bottom surface 1b Side wall 2, 2A Bridge member 2a Bottom surface 2b Side wall 2c Reinforcement rib 3 Connecting member 3a Vertical surface 3b Horizontal surface 4 Ridge 4a Screw hole 5 Tapping screw 6 Hinge 6a Screw hole 7 Connection pin 10 Rotation resistance member 10a Screw hole a Shaft hole b Cut c Screw hole 30 Form plate 31 Separator 32 Square steel pipe 33 Home tie 34 Washer 35 Wedge

Claims (3)

(57) [Claims] The present invention is used for receiving a concrete injection pressure addressed to a back surface of a concrete casting formwork plate, for example, and is provided in parallel with a predetermined interval. A plurality of columnar members 1 having a length; a plurality of bridging members 2 connecting the plurality of columnar members 1 in a ladder shape at a plurality of positions in a longitudinal direction thereof; and the plurality of columnar members. A connecting member 3 having a hinge portion 6 attached to each of the connection points of the bridge member 1 and the bridging member 2; and a rotation resistance that is attached to the connection portion and causes the hinge portion 6 to generate a rotation resistance. A backup material for a shoring comprising the member 10. 2. The columnar member 1 and the bridging member 2 are each made of a channel material having the same channel width, and the connecting member 3 has a shape such that a rectangular plate is bent into an L shape. 2. A surface corresponding to an L-shaped vertical drawing is screwed and fixed to an end of the bridging member 2, and a hinge portion 6 is formed at an edge of the surface corresponding to a horizontal drawing. Backup material for shoring. 3. The rotation resistance member 10 has a shape in which a band-shaped spring material is bent into a U-shape, and a vertical U-shaped portion is screwed to an end of the bridging member 2. 3. The shoring according to claim 1 or 2, wherein the rotation resistance is generated by press-contacting the two horizontal portions with the side wall surface of the channel-shaped columnar member 1. Backup material.