JPH067262Y2 - Mortar presser for piping joint - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to wind an air-conditioning duct or a pipe outer periphery that penetrates a concrete slab of a building, and fill the space between the pipe body and the slab through hole with mortar or the like. The present invention relates to a mortar retainer for a piping joint that supports a receiving plate such as the mortar used when sealing with a product.

[Prior Art] As is well known, in the plumbing work of a concrete structure, after the air conditioning duct and other pipes are inserted into the pipe holes formed in the slab, etc., the joints around this pipe (the outer periphery of the pipe) It was general that mortar or the like was poured into the space formed between the slab and the through hole of the slab) for filling, sealing, makeup, etc., and sealing was performed.

In sealing such piping joints, the following various jigs have been conventionally proposed in order to prevent a filler such as mortar from falling or flowing out and to improve workability.

For example, a mounting band that is bent so as to be wound around the outer periphery of the pipe body, a stopper that connects both ends of the band that is mounted to one end of the mounting band, and an outer and horizontal position at the opening end of the mounting band. , Which consists of a frame plate that can be expanded and contracted to close the opening at the lower end of the through hole of the concrete slab (Actual No. Sho 58-33667), consists of a single metal disc body, and the center of this disc A circular hole is made by leaving several projecting pieces, two groove holes are provided at several places on the disk surface, and tongue pieces are formed from both ends at the cut part where a part of the disk is cut. Something (Jitsuko Sho 59-16612) is known.

Further, recently, as shown in FIG. 5, a horizontal mortar receiving surface portion 1 facing outward is provided at an upper end of a cylindrical body portion 1a having a vertically split shape.
A pair of main bodies 1 and 1 formed by projecting b are pivotally attached to each other at one end outer peripheral portion of the horizontal mortar receiving surface portions 1b and 1b by a vertical axis 2, and the other end lower surfaces of both the mortar receiving surface portions 1b and A mortar presser for pipe joints has been proposed in which the fastening projections 3 are arranged at the ends of the openings of the outer peripheral surfaces of the cylindrical portions 1a, 1a (actually developed shokai).
62-12074).

[Problems to be Solved by the Invention] However, there is a problem that the pipe types and the pipe diameters that can be mounted are limited in any of the conventional devices. That is,
It is generally difficult to mount the above-mentioned ones on rectangular pipes other than circular pipes, and the mounting diameter can be adjusted only in an extremely narrow range. There is the inconvenience of having to prepare several types of jigs that correspond to the external dimensions. In addition, the conventional one has to be fixed with a special stopper or band at the time of use, or it must be used properly according to the pipe type and pipe diameter as described above, so workability is poor and construction cost is high. There is a problem.

In order to solve the above-mentioned conventional problems, the present invention focuses on a hollow plastic sheet formed of an extruded body, and by using this hollow sheet, the pipe type and pipe diameter are restricted. It is designed to be easily adapted to the surface shape of the pipe and to be wound and fixed at will. In addition, in consideration of the weight of the mortar applied to the sheet and the penetration of water from the mortar during use, the following measures are taken to ensure that water resistance (wetness) is maintained and a large vertical load is applied from above. However, it is an object of the present invention to provide a mortar retainer for pipe joints having a vertical rigidity that can sufficiently withstand it.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the mortar retainer of the present invention has a sheet-shaped hollow body made of plastic and a hollow body for winding and fixing the hollow body around the outer circumference of a pipe. Consisting of a member, the hollow body is an extrusion molded body of a thermoplastic resin,
A plurality of vertical ribs are integrally formed between two parallel sheets with a space therebetween in a direction orthogonal to the plane of the sheet, and at least one of the both sheets is parallel to the rib and has a space. It is characterized by forming a plurality of cut lines, a perforation line or a weak line consisting of ruled lines.

[Operation] The sheet-shaped hollow body that constitutes the main body of the mortar presser of the present invention is horizontally oriented through a plurality of cut lines, perforations or ruled lines formed parallel to the vertical ribs and spaced apart. Since it is a sheet-shaped hollow body that can flex freely,
Even if the shape of the pipe or duct to be wound is round or square, or if the thickness is changed, the pipe or duct can be immediately fitted to the outer peripheral surface of the pipe body and fixed by winding. The hollow body is an extruded body of thermoplastic resin, and a plurality of vertical ribs are integrally formed between two parallel sheets in a direction orthogonal to the sheet surface. Since the vertical rigidity is strengthened by forming multiple columns with a cylindrical cross-section inside, this hollow body will remain seated even when heavy weight such as mortar containing a large amount of water is applied during the filling work of the slab through hole. No deformation such as bending. Further, even when an impact is applied from the lateral direction of the tubular body during the filling operation of the mortar or the like or during curing of the mortar, the hollow body wound around the tubular body can buffer and protect it. Furthermore, since the hollow body of the present invention itself has water (wet) resistance, moisture does not permeate during use and strength does not decrease.

[Embodiment] Next, the present invention will be specifically described with reference to the illustrated embodiment.

In FIG. 1, S is a slab of a concrete structure, 1
Reference numeral 0 is a through hole formed in the slab S, and 11 is a tubular body inserted in the through hole. Further, M indicates a mortar filled in the space between the tubular body 11 and the slab through hole 10.
Reference numeral 13 is a horizontal receiving plate provided on the lower surface of the mortar for supporting the filled mortar, and 12 is a mortar retainer of the present invention used with its upper end abutting the lower side of the receiving plate.

The mortar retainer 12 is composed of a sheet-like hollow body 14 as shown in FIGS. 2 and 3, and a binding member 15 for fixing the sheet-like hollow body around the outer periphery of the pipe 11 after winding. .

Hereinafter, the configuration of the hollow body 14 will be specifically described with reference to FIGS. 2 and 3. The hollow body 14 is formed of an extruded body made of a thermoplastic resin such as polyethylene or polypropylene, and is formed between two sheets 16a, 16b extruded in parallel with respect to the sheet surface. A large number of vertical ribs 16c are integrally formed in the orthogonal direction at substantially regular intervals. Thus, the two sheets 16a, 1
6b and the vertical ribs 16c form a plurality of columns 16d having a substantially rectangular tubular cross section.

Reference numeral 17 is a weak line made up of cut lines, perforations or ruled lines formed on at least one of the two sheets 16a and 16b on one side in parallel with the vertical ribs 16c and at intervals. This weakening line provides flexibility so that the sheet-like hollow body 14 can be wrapped around the outer periphery of the pipe passing through the slab with good conformity. Of course, the weakening lines are provided at appropriate intervals in consideration of the rigidity of the hollow body. This line of weakness is usually
Although it is formed after the post-processing, that is, after extrusion molding of the hollow body, when a cut line or ruled line is provided, the hollow body can be simultaneously formed at the time of extrusion molding.

Reference numeral 18 denotes a welded portion of the binding material 15 to the hollow body 14, which is provided from the end of the sheet-like hollow body 14. Further, reference numeral 19 is a locking projection provided on the other end side of the sheet-shaped hollow body, and is provided so as to be inserted into an engagement hole 15a provided in the binding material 15.

When using the mortar retainer having the above structure, the mortar support plate 13 attached to the lower surface side of the slab through hole 10 is supported, so that the tubular body 1 that penetrates the slab through the weakening line is used.
The sheet-like hollow body 14 is wound around the outer circumference of the tubular body at least once so that the sheet-like hollow body 14 conforms to the surface of the sheet 1 (see FIG. 1). At that time, the overlap of the end portions of the sheet-shaped hollow body 14 may be large. Then, the upper end surface 16e of the sheet-shaped hollow body 14 is brought into contact with the lower surface of the receiving plate 13. In the case of the illustrated embodiment, the sheet-like hollow body 14 is wound around the outer periphery of the tube body 11 and then fastened with the binding material 15 to be fixed to the tube body 11. At that time, the locking projection 19 is engaged with the engagement hole 15a provided in the binding material. After that, mortar is poured into the through hole 10.

The sheet-like hollow body of the present invention made of an extruded body has a structure in which a plurality of vertical ribs are integrally formed between two parallel sheets in a direction orthogonal to the plane of the sheet. Since a column having a cylindrical cross-section is formed on the to enhance the vertical rigidity, even if the weight of the mortar poured into the slab through hole is concentrated on the hollow body as a vertical load, it does not deform. .

After waiting for the mortar to harden, the receiving plate 13 and the sheet-like hollow body 14 are removed, and the construction is completed.

Although the binding material 15 and the sheet-shaped hollow body 14 are integrally welded in this embodiment, they may be separate bodies. Further, the structure of the binding material is not limited to the illustrated example, and as shown in FIG. 4 (A) and FIG. 4 (B), for example,
A cord body provided with a large number of clamp claws 20 at one end and a locking ring 21 at the other end, or a sawtooth-shaped or a large number of projections 22 provided on one surface and a locking ring 23 at one end thereof. It may be a band made of PP or nylon provided. In some cases, the binding material may be made of a metal wire. In short, the member for binding the hollow body 14 to the pipe 11
Any material can be used as long as it can be fixed so that it does not slip off or come off the tube after being wrapped around the outer circumference of the. Further, the sheet-shaped hollow body 14 is not limited to that of the embodiment, and it is possible to use a sheet of fibrous material, a net, a sealing material, or the like, for example, on one side of the hollow body on which the hollow body is wound. .

[Effect of the Invention] As described in detail above, the mortar retainer of the present invention is
It is composed of a sheet-shaped hollow body made of plastic and a member for winding and fixing the hollow body around the outer circumference of the pipe. The hollow body is an extruded body of a thermoplastic resin and has two parallel sheets. Between the sheets, a plurality of vertical ribs are formed integrally with each other in the direction orthogonal to the plane of the sheet at intervals, and at least one of the both sheets is parallel to the ribs and has a plurality of intervals. Since it is a weak line made up of cut lines, perforations or ruled lines, it can be used even if the pipe to be wound is a round pipe or a square pipe, or if the thickness changes. The flexible hollow body can be immediately conformed to the outer circumference of the tube and wound, and then fixed by an appropriate binding member.

Moreover, even if the weight of mortar containing a large amount of water is concentrated on the upper end of the mortar retainer, the hollow body having the above-mentioned configuration does not bend or deform, and the hollow body itself has water (wet) resistance. Since water does not permeate during use and strength does not decrease, durability is greatly extended and construction efficiency is also improved.

Further, the hollow body of the present invention has a practical effect that it can be manufactured by an extrusion molded body of a thermoplastic resin, which requires a small number of manufacturing steps and is inexpensive.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a usage state of the present invention,
FIG. 2 is a perspective view of an embodiment of the present invention, FIG. 3 is a plan view thereof, FIGS. 4 (A) and 4 (B) are perspective views showing an example of a binding material, and FIG. It is a perspective view which shows an example. 10 ... Through hole, 11 ... Tube, 12 ... Mortar retainer, 13 ... Mortar receiving plate, 14 ... Sheet-like hollow body,
15 ... Bundling material, 16a, 16b ... Plastic sheet, 16c ... Vertical ribs, 16d ... Column, 16e ...
… Upper surface, 17 …… Weak line, 18 …… Welded part, 19 ……
Locking protrusion

Claims (1)

[Scope of utility model registration request] 1. A mortar for piping joints which supports a backing plate by having its upper end abut against the lower surface of a backing plate of a filling material such as mortar which is wrapped around the outer circumference of the pipe passing through the slab to fill the space between the pipe and the slab through hole. It is a presser, and comprises a sheet-shaped hollow body made of plastic and a member for winding and fixing the hollow body around the outer circumference of the pipe, and the hollow body is an extruded body of a thermoplastic resin. hand,
A large number of vertical ribs are integrally formed between two parallel sheets in a direction orthogonal to the plane of the sheet with a space therebetween, and at least one of the both sheets is parallel to the rib and has a space therebetween. A mortar retainer for piping joints, characterized in that a plurality of cut lines, perforations, or weakened lines consisting of ruled lines are formed.