JPS6223958Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a support for formwork made of wire mesh.

Conventional metal ladder-shaped supports are integrally formed,
A widely adopted method is to construct a concrete structure by erecting the pillars separated for a certain period of time, placing wire mesh in parallel on both sides of the pillars, assembling a formwork, and pouring concrete between the wire meshes. ing. In this conventional construction method, the pillars are buried along with the wire mesh, making it impossible to reuse the pillars and the like, making it extremely uneconomical. Furthermore, the pillars formed integrally in the form of a ladder did not provide much strength, and could only support a distance of about 18 cm between the two wire meshes.

In order to improve this drawback, in recent years, as shown in Fig. 11, supports a made of angle members having an L-shaped cross section are erected on both sides of the wire mesh c, which are erected opposite each other. A method of constructing a formwork by supporting the pillars a and holding the space between the pillars a with spacing holders b has been adopted. In the formwork for this construction method,
A support column a made of only one angle member cannot be used when assembling formwork of various heights, and when installing a spacing retainer b such as a steel bar with a nut d, the angle member is point symmetrical. Since the spacing holders b are erected facing each other, the spacing holders b are not perpendicular to the wire mesh c, making installation extremely difficult. Furthermore, when the thick piece e is attached to the support post a parallel to the wire mesh c, the thick piece e
This has the disadvantage that there is only a small contact area between the support column a and the angle member, which causes the angle member to bend.

This idea was made to improve the above-mentioned shortcomings; it can accommodate formwork of various heights, it is easy to install spacing retainers, and it does not bend even when thick timbers are installed. To provide a support for a formwork made of wire mesh, which can further improve the finish of the concrete surface without causing any damage.

The invention will be explained in detail below based on the embodiments shown in the figures.

In the figure, A is a support for wire mesh formwork according to this invention, and is made up of one or two C channel materials. The number of C channel materials 1 is not limited to two, but a plurality of them may be used.

The side surface of the flange 12 on one side of the C channel material is brought into contact with the side surface of the flange 12 on one side of the other adjacent C channel material 1. At this time, the directions of the C channel materials 1 are made to match so that the webs 11 of both C channel materials 1 are flush with each other.

These two C channel materials 1 are integrally connected by a connecting tool 2. Various embodiments are conceivable for the connector 2, but in the embodiment shown in FIG. The unwelded surface of the substrate 21 is bent toward the web 11 side of the C channel material 1 so as to be positioned parallel to the web 11. A sliding plate 22 is brought into sliding contact with this substrate 21.
The sliding plate 22 is also a plate body with an L-shaped cross section,
One side is brought into contact with the surface of the substrate 21 so as to be parallel to the web 11 of the C channel material 1. A long hole 23 extending in the expected width direction of the C channel material 1 is formed in the surface of the sliding plate 22 which is in contact with the substrate 21 . Furthermore, at the end of the surface of the sliding plate 22 that comes into contact with the substrate 21, there is a locking part 24 that is long in the longitudinal direction of the C channel material 1 and protrudes toward the side opposite to the C channel material 1.
is installed protrudingly.

Substrate 21 and sliding plate 22 configured as above
can be slidably contacted by a guide plate 25. The guide plate 25 is provided with two elongated holes 26 whose spacing gradually increases from one end to the other end. This guide plate 25 is brought into contact with the surface of the sliding plate 22, the locking part 24 is locked in one long hole 26, and the other long hole 2
6, the board 21 is inserted into the long hole 23 of the sliding plate 22.
A pin 27 is inserted through which the guide plate 25 is fixed by its head 28 so that it cannot be removed.

To explain the operation of the connector 2 configured as above, the guide plate 25 is moved in the longitudinal direction of the C channel material 1 to change the distance between the pin 27 and the locking portion 24. In other words, the distance between the two long holes 26 changes from one end to the other, and when the pin 27 and the locking portion 24 are moved toward the narrower distance between the two, the sliding plate 22 moves with the movement of the locking portion 24. It slides in the opposite direction to the C channel material 1. Therefore, the distance between the curved side surface of the sliding plate 22 that is not in sliding contact with the substrate 21 and the flange 12 of the C channel material 1 increases, and the other C channel material 1 becomes able to move freely. The length of can be expanded and contracted.

When the guide plate 25 is moved in the opposite direction to widen the distance between the pin 27 and the locking part 24, the space between the bent side of the sliding plate 22 that does not make sliding contact with the substrate 21 and the flange 12 of the C channel material 1 is increased. The gap between the two C channel materials 1 becomes narrower and the other C channel material 1
The two C channel materials 1 are connected and fixed by pulling them in the same direction and holding them therebetween.

Other connectors 2 such as those shown in FIGS. 4 and 5 can also be used. That is, a bolt 32 is screwably provided on one side of a rectangular connecting belt 31, a plurality of C channel materials are inserted into the connecting belt 31, and the bolts 32 are screwed together to connect each one of the C channel materials. becomes possible.

In addition, as the connecting device 2, two connecting plates 41 each having a U-shaped cross section with both ends bent, as shown in the embodiment shown in FIG. 6 and FIG.
It is also possible to use a device configured so that they can be moved close to each other. It is possible to construct the support column 1 by inserting the C channel material 1 on both sides of the bolt 42 between the two connecting plates 41 and connecting them.

Fixtures 5 and 6 for end pieces are fixed to the pillar A constructed as described above near the upper and lower ends, respectively. The fixture 5 fixed near the upper end of the column A is bent in a step-like manner, and this fixture 5 is fixed to the end face of the flange 12 of one C channel material 1 by welding, and at right angles to
A bolt 51 is attached so as to be movable in the direction of the web 11.

The fixture 6 to be fixed near the lower end of the support column A is fixed to the end face of the flange 12 near the end of the other C channel member 1 by welding. The fixture 6 is bent to have an L-shaped cross section, and is fixed on one side, and has a hole 61 bored in the other side.

Next, a case will be described in which a concrete structure is constructed by assembling a form using the pillar A constructed as described above.

As shown in FIG. 3, two columns A are erected in parallel with their webs 11 facing each other,
A spacer holder 7 made of a steel rod is inserted into a long hole 14 drilled in the
Maintain spacing through. In this way, the pillars A facing each other and maintaining a distance are erected at a certain distance apart,
In the direction perpendicular to the spacing retainer, the thick timber 8 is attached to the support A.
Pass it between. Thick material 7 attached to the top of column A
has an L-shaped cross section, and has a fitting 5 and a C channel material 1.
Place it on the top end. The end piece 8 attached to the lower part of the column A has a rectangular cross section and is fixed by nailing to the fixture 6. In addition, a steel pipe is used as the thick end material 8 and is clamped and fixed by a U-shaped clamping tool 71 attached to the tip of the spacing holder 7. A wire mesh 9 is erected in parallel between the opposing supports A, and the wire mesh 9
Place reinforcing bars in between.

Although this invention has the above-mentioned configuration, various other embodiments as shown in FIGS. 8 to 10 are conceivable. That is, as shown in FIG. 8, the end of the flange 12 of one C-channel material 1 may be bent into a U-shape, and the end of the flange 12 of the other C-channel material 1 may be locked. . In addition, in the embodiment shown in FIG.
The convex portion 15 may be formed along the entire length of the flange 12 of the channel material 1 in the longitudinal direction, and may be fitted into the recessed portion 16 formed along the entire length of the flange 12 of the other C channel material 1 in the longitudinal direction. Further, as shown in FIG. 10, a pin 17 or a bolt nut may be used as the connector 2. Other C-channel materials 1 in which lips are formed opposite to each other at the ends of the flange 12 can also be employed in the same manner.

Since this invention has the above configuration, the following effects can be obtained.

Since the C-channel materials are configured to be able to slide into contact with each other, the length of the support can be freely expanded and contracted, making it possible to accommodate formwork of various heights.

The spacer is easy to install because it can be installed through a hole formed in the web of the wide C-channel material.

Further, the thick end material is attached by making it come into contact with the flange of the C channel material, but since the C channel material comes into contact with the ends of a plurality of flanges, stable attachment can be achieved and the support column will not be bent.

Since the supports are erected with the web surface facing the wire mesh side, the web surface comes into contact with the concrete protruding from the mesh of the wire mesh, making it possible to finish the concrete surface smoothly.

In addition, the flanges prevent concrete protruding from the mesh from entering the back side of the web, allowing for smooth removal of the supports.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of this invention, Fig. 2 is an enlarged perspective view, Fig. 3 is a perspective view of a formwork assembled using columns according to this invention, and Figs. 4 to 7. 8 is a perspective view of another embodiment of the connector, FIGS. 8 to 10 are cross-sectional views of other embodiments of this invention, and FIG. 11 is a cross-sectional view of a formwork assembled with conventional supports. It is. A... Support column, 1... C channel material, 2... Connector, 5, 6... Mounting tool, 7... Spacing holder, 8
... end thick material, 11 ... web, 12 ... flange, 21 ... substrate, 22 ... sliding plate, 25 ... guiding plate.

Claims (1)

[Scope of utility model registration request] Connect all C-channel materials by connecting multiple C-channel materials so that the flange surface of each C-channel material is in contact with the flange surface of an adjacent C-channel material, and the webs of all C-channel materials are flush. A wire mesh formwork support that is connected together with a tool so that each C channel material can slide into contact with each other.