JPH0633121Y2 - Formwork for repairing piping holes - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is for repairing a hole for a pipe to prevent the mortar for repair from flowing out when the hole for a pipe is repaired with a mortar for repairing. It concerns the formwork.

[Prior Art] When a drainage pipe, a water pipe, a gas pipe or the like is piped through a floor slab of a concrete building, the pipe is inserted through a pipe hole previously opened in the floor slab. After that, repairing mortar is injected into the piping hole to close it for waterproofing and fire protection. Since this repair mortar is kneaded so that it can be filled in a small gap with a slightly larger amount of water, it is necessary to block the piping hole so that the repair mortar injected into the piping hole does not flow down. .

Conventionally, as a repairing form for a pipe hole that closes the pipe hole, as shown in FIG. 6, a hole 102 having the same diameter as the outer diameter of the pipe is made in a veneer plate 101 with a saw and the like, and the center of the hole 102 is formed. Some have a cut 103 facing toward them. As shown in FIG. 7, the mold 100 is constructed by inserting, for example, a drainage pipe 113 into a pipe hole 112 formed in a floor slab 111 of a concrete building, and then connecting the drainage pipe 113 to the rising portion thereof. The cut 103 of the frame 100 is spread and fitted, and the form 1
00 is pressed against the lower surface of the floor slab 111 using a plurality of support rods 114 to close the piping hole 112.

In this way, the pipe hole 112 can be repaired by injecting the repair mortar 115 and sufficiently hardening it while the pipe hole 112 is blocked by the mold 100.

[Problems to be Solved by the Invention] However, in the above-described conventional technique, the support rod 114 is not attached to the drain pipe 1.
Since it is supported by 13, the pipe joint 113a, the beam, and the like, there is a problem that the mounting work in a high place or a narrow place becomes difficult and the work efficiency decreases. Moreover, depending on the mounting location, the supporting rod 1
Since the lengths of the support rods 14 are different, it is very troublesome to adjust the length of the support rod 114 on site, and it is uneconomical because the support rod cannot be reused. In particular, when the pipes are installed vertically such as shared drainage pipes and rainwater drainage pipes, the support rod 1
Since 14 must be supported by the floor slab 111 on the lower floor, it is uneconomical to use a long, durable and expensive material as the supporting rod 114, and the supporting rod 114 is long.
Was very troublesome to handle.

In addition, it is very difficult to cut out a perfect circular hole 102 in the veneer plate with a saw, and it requires a high level of skill and time, and if the diameter of the hole 102 is smaller than the outer diameter of the drain pipe 113, the formwork 10 is formed.
0 cannot be easily fitted into the drain pipe 113, and if the diameter of the hole 102 is larger than the outer diameter of the drain pipe 113, a gap is created between the hole 102 and the drain pipe 113, and the repair mortar 115 flows out. There is.

The present invention has been made in view of the above problems, and can be easily attached and removed to improve work efficiency.
An object of the present invention is to provide a repairing mold for a piping hole, which can satisfactorily close the piping hole and completely prevent the repair mortar from flowing out.

[Means for Solving the Problem] The present invention inserts a pipe into a pipe hole formed in a floor slab of a concrete building, and injects repair mortar into the pipe hole to close the pipe hole when repairing. In a repairing form for a piping hole, a support portion made of a cylindrical elastic material wound around the pipe, and a frame body made of an elastic material extending in a dish-like brim shape shallower than one end of the support portion. It is characterized in that it is provided with a break formed in the supporting portion and the frame and a fixing means for fastening and fixing the supporting portion to the pipe. Further, an annular auxiliary plate having a cut may be provided on the frame body.

[Operation] According to the repairing form of the piping hole configured as described above, the cut formed in the support portion and the frame body is widened and fitted into the pipe, and the frame body is pressed against the lower surface of the floor slab and fixed. By fixing to the pipe by the means, the pipe hole can be closed with the frame body. Moreover, by forming the support portion and the frame body with the elastic material, the support body and the frame body can be in close contact with the pipe or the floor slab to enhance the sealing property.

Further, by forming the frame body into a shallow dish shape, the strength and elastic force of the frame body are increased, and the frame body can be pressed against the floor slab.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a repairing mold for a piping hole applied to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a sectional view of the same. In the figure, reference numeral 1 denotes a cylindrical supporting portion having an inner diameter equal to or slightly smaller than the outer diameter of the tube, and it is desirable that the inner diameter of the supporting portion 1 be slightly smaller than the outer diameter of the tube in order to improve the adhesion with the tube. In this embodiment, for example, when used for a cast iron pipe having a nominal diameter of 3/4 inch, the inner diameter of the support portion 1 is 26 mm, which is 1.2 mm smaller than the outer diameter of the cast iron pipe, 27.2 mm.
In addition, when using 2 for a cast iron pipe with a nominal diameter of 2 inches, when the inner diameter of the support part 1 is 59 mm, which is 1.5 mm smaller than the outer diameter 60.5 mm of the cast iron pipe, and for a cast iron pipe with a nominal diameter of 4 inches. Indicates that the inner diameter of the support portion 1 is 2.3 from the outer diameter 114.3 mm of the cast iron pipe.
It is set to 112 mm, which is smaller by mm.

A brim-shaped frame body 2 is extended to one end of the support portion 1. The support portion 1 and the frame body 2 are integrally molded of an elastic material such as natural rubber or synthetic rubber by using a known molding means. Made In this embodiment, the frame body 2 is formed in a shallow dish shape as shown in FIG. 3 so that the strength and elastic force of the frame body 2 itself are increased.

A gap 3 is formed between the support portion 1 and the frame body 2 so that the support portion 1 and the frame body 2 can be attached to and detached from the rising portion of the pipe that is piped.
Are formed. As shown in FIG. 4, the cut 3 is stepwise cut at the frame body 2, and fan-shaped tongues 2a and 2b are formed at both ends of the frame body 2. These tongue pieces 2a, 2
b is when the frame body 2 is pressed against the floor slab and becomes flat,
It is considered that the upper tongue piece 2a overlaps the lower tongue piece 2b so that the outer circumference of the frame body 2 is widened so that no gap is formed, and the upper tongue piece 2a is formed larger than the lower tongue piece 2b. .

Further, a velvet fastener 4 having a hook surface and a loop surface with a slit 3 sandwiched between the support portion 1 and the frame body 2, respectively.
a, 4b, 5a and 5b are fixed.

The formwork 6 configured in this way has a nominal pipe diameter (for example, 3/4
Multiple types are made according to inch, 2 inch, 4 inch).

Next, a method of using the repairing mold 6 for the piping hole will be described with reference to FIG. First, for example, a 4-inch drainage pipe 13 is inserted into a piping hole 12 formed in a floor slab 11 of a concrete structure as shown in the figure for piping. At the time of completion of this piping work, the support body 1 and the frame body 6 are fitted in the rising portion of the drain pipe 13 by widening the cuts 3 formed in the support body 1 and the frame body 2, and the support body 1 is wound around the drain pipe 13. After that, the support 1 is held by, for example, the left hand and pushed up, and the frame 2 is pressed against the lower surface of the floor slab 11. Then, while pulling the velvet fastener 4a with, for example, the right hand, the support 1 is fastened to the drain pipe 13, and in this state, the velvet fastener 4a
A is fastened and fixed to the velvet fastener 4b. At this time, the tongue pieces 2a and 2b of the frame body 2 are fixed with the velvet fasteners 5a and 5b so as not to open.

In this manner, with the formwork 6 closing the piping hole 12,
The repairing mortar 14 is injected into the piping hole 12. When the repair mortar 14 is sufficiently hardened, the velvet fasteners 4a and 5a are removed, the cut 3 between the support 1 and the frame 2 is widened, and the form 6 is removed from the drain pipe 13.

Therefore, according to such a configuration, the cut 3 formed in the support portion 1 and the frame body 2 is expanded and fitted into the drain pipe 13, and the frame body 1 is pressed against the lower surface of the floor slab 11 and tightened and fixed to the drain pipe 13. By doing so, the mold 6 can be easily attached, and by releasing the tightening of the support portion 1, the mold 6 can be easily removed.
The work efficiency can be remarkably improved as compared with the conventional one. Moreover, since the frame body 2 is integrally provided on the support portion 1 that is fastened and fixed to the drain pipe 13, the mold 6 can be directly attached to the drain pipe 13 without using a supporting rod, so that the conventional technique does not require attachment. The mold 6 can be easily attached to a narrow space and a vertically piped pipe, which was difficult, and the entire mold 6 can be reused, and an expensive supporting rod is not required, which is economical. is there.

Further, by forming the support portion 1 and the frame body 2 from an elastic material, the adhesion between the drain pipe 13 and the drain pipe 13 is secured, and even if foreign matter such as unevenness or nails exists on the floor slab 11, the foreign matter Is elastically wrapped to improve the adhesion with the floor slab 11, so that the piping hole 12 can be satisfactorily closed and the repair mortar 14 can be prevented from flowing out. In this case, by forming the frame body 2 in a shallow dish shape, the strength of the frame body 2 is increased to withstand the weight of the mortar to be injected, and the dish body 2 is attached to the floor slab 11. The close contact can remarkably enhance the sealing property.

The present invention is not limited to the above embodiment,
Various modifications can be implemented without changing the gist.

For example, when the piping hole is larger than the frame body, an annular auxiliary plate having a larger outer diameter than the frame body may be placed on the frame body to close the piping hole with the auxiliary plate and the frame body. Desirably, the inner diameter of the auxiliary plate is made larger than the outer diameter of the tube so that the auxiliary plate can freely move in the radial direction around the tube.

Further, in the above-mentioned embodiment, the supporting portion is fastened and fixed to the pipe by using the velvet fastener, but the present invention is not limited to this, and it can be fastened and fixed by using, for example, a string, a belt or a buckle.

[Effects of the Invention] As described above, according to the present invention, since the structure is an integral structure, the handling and mounting / removal is easy and the working efficiency can be improved, and the repair to be injected into the piping hole is performed. It is possible to provide a formwork for repairing piping holes, which can support the mortar for use and completely prevent the mortar from flowing out.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a repairing form for a piping hole to which the present invention is applied, FIG. 2 is a plan view of the embodiment, and FIG. 3 is a view taken along line AA in FIG. FIG. 4 is a cross-sectional view of the same embodiment seen in the direction of the arrow, FIG. 4 is an enlarged view showing a main part of the same embodiment, FIG. 5 is an explanatory view showing a usage state of the same embodiment, and FIG. FIG. 7 is a plan view showing an example of a mold for repairing holes, and FIG. 7 is an explanatory view showing a usage state of the mold. DESCRIPTION OF SYMBOLS 1 ... Support part, 2 ... Frame body 2a, 2b ... Tongue piece, 3 ... Cut line 4a, 4b, 5a, 5b ... Velvet fastener 6 ... Piping hole repair formwork 11 ... Floor slab, 12 ... Piping hole 13 … Drain pipe, 14… Repair mortar

Claims (2)

[Scope of utility model registration request] 1. A repair of a piping hole for inserting a pipe into a piping hole formed in a floor slab of a concrete building, and injecting repair mortar into the piping hole to close the piping hole when repairing. In the formwork, a support portion made of a cylindrical elastic material wound around the tube, a frame body made of an elastic material extending in a dish-like brim shape shallower than one end of the support portion, the support portion, and A formwork for repairing a hole for piping, comprising: a break formed in the frame body; and a fixing means for fastening and fixing the support portion to the pipe. 2. A formwork for repairing a hole for piping according to claim 1, wherein an annular auxiliary plate having a cut is provided on the frame body.