JPS6227635Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fabric sheet for formwork used in concrete work, particularly when concrete is poured to reinforce the bottom surface of the slab of a concrete structure, and is convenient for storage and transportation. The purpose of the present invention is to provide a fabric sheet for formwork that can be easily and reliably stretched, can be produced by a relatively simple weaving process, and can also function reliably as formwork for concrete construction. .

Conventionally, as a technique for forming a formwork for concrete work using a fabric sheet, a method is known in which a bag is formed using the fabric sheet and the inside of the bag is filled with mortar, cement paste, etc. ing.

However, in concrete work for reinforcing concrete legs, girders, the bottom surface of slabs, etc. on elevated expressways, elevated railways, etc., a method of attaching and fixing wooden forms etc. to the reinforced surface is adopted. , it requires the preparation and transportation of a large amount of formwork materials, as well as skilled carpentry skills.
Not only did the construction period take a long time and the cost was high, but the formwork always required removal after construction was completed.

The present invention eliminates the need for conventional wooden formwork, etc. by using a fabric sheet for formwork in concrete construction as described in the scope of the utility model registration claim. In addition to omitting work, the preparation, storage, transportation, and installation of the formwork materials were made simple, and the formwork functioned reliably.

The configuration of the illustrated example will be described below.

Figures 1 to 5 show a part of an example of implementation, and the ground structure portion 1 that constitutes the entire sheet surface.
is woven with a fabric density that allows water to pass through but does not allow cement particles to pass through, and is continuous in the directions of the double arrows A and B within the performance of the loom.

In the above-mentioned ground texture portion 1, additional warp and warp yarns are woven over the entire surface in the warp and warp direction, and one yarn of the additional warp and warp, the additional weft in the illustrated example, is woven into the ground texture portion 1, as shown in FIG. A floating tissue 3 is formed in a small area portion 2 of the surface A of the substrate 1 . As shown in FIG. 5, the small area portions 2 are formed at a number of locations on the surface A of the ground structure portion 1 at regular intervals in the longitudinal direction.

The additional warp yarns and additional weft yarns other than the portion forming the floating weave 3 are both in the warp direction C and weft passing through the small area portion 2 on the back surface B of the ground weave portion 1, as shown in FIG. In the direction D, floating structures 4 and 5 are formed. That is, the additional warp yarns form a floating structure 4 in the weft direction D, and the additional weft yarns form a floating structure 5 in the warp direction C.

The floating texture 3 portion of the small area portion 2 on the front surface A of the ground texture portion 1 forms a hook gap 7 for the hook 6, as shown in FIG. 6, and the floating textures 4, 5 portions on the back surface B of the ground texture portion 1 are
Gaps 10, 11 are formed for the ropes 8, 9, etc. to pass through.

The fabric sheet having the above structure is used as shown in FIGS. 7 and 8.

That is, the girder 13 of the concrete structure 12,
To explain the case where a reinforced concrete layer is formed on the lower surfaces 15 and 16 of the slab 14, the lower surface 1
5 and 16 to form a rough surface, embedded hook bolts 17 and 18 are attached to the lower surface 1 in correspondence with the position of the floating structure 3 in the small area portion 2 shown in FIG.
At the same time, ropes 8, 9, etc. are inserted and arranged in advance into the insertion gaps 10, 11 of the fabric sheet, and the fabric sheet is embedded using the hooking gap 7 of the floating tissue 3. hook bolt 17,1
8, and the peripheral edge of the fabric sheet is attached to the peripheral wall portions 19, 2 of the concrete structure 12.
0 by appropriate means, and both ends of the ropes 8, 9 are also fixed to the peripheral wall portion to tension the ropes 8, 9.

Through the above operations, the fabric sheet is stretched across the lower surface 15 of the girder 13 of the concrete structure 12 and the lower surface 16 of the slab 14 with a distance H between them.

After that, when this interval H is filled with mortar, cement paste, etc., the excess moisture flows down because the texture part 1 of the fabric sheet has a fabric density that allows moisture to pass through but does not allow cement particles to pass through. , discharged, and the mortar or glue-like material hardens. After curing, the fabric sheet may be peeled off, or a decorative layer such as mortar may be formed on the outer surface of the fabric sheet while it is being stretched.

The constituent yarns and additional warp yarns of the ground texture portion 1 of the fabric sheet according to the present invention may be made of any material as long as it has the strength to withstand the weight of the mortar etc. described above until it hardens during filling.
Synthetic fiber yarns are primarily used.

In addition, in the illustrated embodiment, floating tissues 3, 4, 5
are composed of only additional wefts or warps, respectively, but by weaving another warp or weft into this floating structure part, the floating structures 3, 4, and 5 are created.
Of course, the sections may also be constructed in a multilayer woven structure relative to the ground section 1.

The fabric sheet for formwork in concrete work according to the present invention has the structure and function described above, and is formed as a single sheet, so when storing and transporting it, it must be wrapped around a roll. Since it can be handled in a folded state, it does not take up much space to store and can be easily transported.

In addition, the formwork can be erected by simply hooking it to a hook using the floating structure, supporting it from below with a rope, etc., and fixing the peripheral edge to the surrounding wall, so it requires special skill. This has the effect that it can be easily and reliably stretched as a formwork without any problems.

Furthermore, it can be manufactured by a single step of weaving on a loom, and after that, it can be used as a formwork by simply inserting a rope, etc., so it is easy to manufacture, and when used as a formwork, Since it can be easily cut and used at the construction site according to the shape and dimensions of the construction site, it also has the effect of significantly reducing processing time and processing costs.

In addition, the ground structure has a fabric density that allows moisture to pass through but does not allow cement particles to pass through, and a rope or the like can be inserted through the floating structure on the back side of the ground structure to support weight. Because of this, it also has the effect of being able to function reliably as formwork for concrete work.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a part of an embodiment, FIG. 2 is a schematic rear view of what is shown in FIG. 1, and FIG. 3 is an enlarged schematic cross-sectional view taken along the line - , FIG. 4 is an enlarged schematic view of the cross section taken along the line - in FIG. 1, FIG. 5 is a schematic oblique view showing the entire fabric sheet shown in FIG. 1, and FIG. FIG. 7 is a schematic cross-sectional view showing the fabric sheet according to the present invention being used as a formwork, and FIG. 8 is a schematic enlarged cross-sectional view of the main part shown in FIG. be. 1: Ground tissue part, 2: Small area part, 3, 4,
5: floating tissue, 6: hook, 7: hook gap,
8, 9: rope, 10, 11: insertion gap, A: surface of the ground weave part, B: back surface of the ground weave part.

Claims (1)

[Scope of utility model registration request] The base texture that makes up the entire surface of the sheet is woven with a fabric density that allows moisture to pass through but does not allow cement particles to pass through.Additional warp and warp yarns are woven into the base texture in the warp and warp directions, and the additional warp and warp yarns One of the yarns has a floating texture in a large number of small area parts that are spaced at regular intervals in the warp and warp directions on the surface of the ground texture part, and the additional warp and warp yarns other than the parts forming the floating texture are: A floating structure is formed in the longitudinal direction passing through the small area portion on the back surface of the ground structure portion, and the floating structure portion on the surface of the ground structure portion forms a hook hooking gap, and the floating structure on the back surface of the ground structure portion is formed as a floating structure. Part,
A fabric sheet for formwork in concrete work, characterized by forming a gap through which ropes can be inserted.