JPH0225032Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a mortar presser for pipe joints used when filling mortar into pipe joints of pipes penetrating a slab (concrete floor). .

〓Conventional technology〓 Conventionally, the method shown in Fig. 3 has been used to fill the joints of slab penetrating piping with mortar.

In this conventional construction method, first, a portion of the pipe P penetrating the slab S is placed at an appropriate distance below the slab S.
The fixing base part 50 is assembled by tightening the square pieces 51, 51, 51, etc. prepared in advance in a grid shape with wires 52 or the like. Next, on the lower surface of the slab S, plywood plates 55, 5 are provided with semicircular notches into which the pipes P fit.
5 is placed between the left and right sides of the pipe P, and between the plywood plates 55, 55 and the fixing base portion 50, there are presser bars 53, 53 whose upper ends press the plywood plates 55, 55 against the lower surface of the slab S. , 53... are fixed to appropriate locations on the fixing base 50 with nails 54, etc.
The plywood boards 55, 55 are fixed so as to cover the bottom of the pipe joint Q. Then, mortar M is placed on this pipe joint Q.
After the mortar M is filled and solidified, the presser rod 53, the plywood board 55, and the fixing base portion 50 are removed.

〓Problems to be solved by the invention〓 Therefore, according to the above-mentioned conventional construction method, it takes a lot of work to fix the plywood boards 55, 55 to the lower surface of the slab S, and in particular, this work is an overhead work. It is known that not only does it require a lot of effort, but it is also difficult to securely fix the plywood boards 55, 55 and to properly close the bottom of the pipe joint Q, and the finish tends to deteriorate even if effort is put into it. It is being

Furthermore, in this conventional construction method, the work of removing the fixing base portion 50 at a later date is similarly complicated and requires a great deal of labor, and the cost of filling mortar into the pipe joints is a major cause of the increase in piping work costs. There is.

Therefore, the present invention was devised to solve the above-mentioned drawbacks, and the purpose is to provide a mortar holder for pipe joints that can securely and accurately fix the mortar receiving surface to the lower surface of the slab with easy work. That is.

〓Means for solving the problem〓 In line with the above-mentioned purpose, the structure of the present invention, which is based on the above-mentioned claims for utility model registration, is to solve the above-mentioned problem. At the top of 10,
A horizontal mortar receiving surface portion 20 is provided protruding outward, and an overlapping surface portion 21 having a thickness approximately half of the upper surface side of the horizontal mortar receiving surface portion 20 is provided at one end of the horizontal mortar receiving surface portion 20, and an overlapping surface portion 21 having a thickness approximately half of the upper surface side of the horizontal mortar receiving surface portion 20 is provided at one end of the horizontal mortar receiving surface portion 20. A low step surface portion 22 is formed, and an overlapping surface portion 11 having a thickness approximately half of the outer peripheral surface side of the horizontal mortar receiving surface portion 20 extends from one end of the cylindrical body portion 10, and the overlapping surface portion 11 extends from the other end. A low step surface portion 12 is formed for the purpose of securing the cylindrical body portion 10, and fasteners 30 are provided on the outer peripheral surface portions of both ends of the cylindrical body portion 10.
This is a technical measure in which a fastening protrusion 14 having an insertion hole 13 is arranged.

〓Operation〓 Therefore, in the present invention, a pair of mortar holders for the pipe joints of the present invention are prepared, and as shown in Fig. 2, the pipe P is sandwiched from both sides at the bottom surface of the slab S of the pipe P. Both ends of the body portions 1a, 1a and both ends of the mortar receiving surfaces 1b, 1b are respectively joined. Then, the overlapping surface section 21 of one horizontal mortar receiving surface section 20 overlaps on the low step surface section 22 of another horizontal mortar receiving surface section 20, and there is some error between the inner diameter of the cylindrical body section 10 and the outer diameter of the pipe P. Both mortar receiving surfaces 20, 20 form a ring disk shape with no gap. Then, when the fastening protrusions 14, 14 of the two cylindrical body parts 10, 10 are connected and fixed with an appropriate fastener 30, both the cylindrical body parts 10, 10 and both horizontal mortar receiving surfaces 20, 20 are connected to the pipe P. Fixed. Therefore,,
Both mortar receiving surfaces 20, 20 serve to close the bottom of the pipe joint Q, thereby allowing the pipe joint Q to be filled with mortar M.

In addition, the ability to cope with changes in the diameter of the pipe P is affected by the degree of overlap between the overlapping surface portion 11 and the low-step surface portion 12, and the fact that they are overlapping allows the cylindrical body portion 1a with a semicircular cross section to be mounted on two hinges. If this configuration is adopted, both ends of the cylindrical body part 1a will easily deform in response to a force that pushes them inward, and a local force will be applied to the pipe P when tightening.
a and 1a can be considered as an integral structure with a circular cross section, and exhibit the effect of not locally concentrating the fastening force.

Embodiments Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 and 1' are mortar holders for the piping joints of the present invention, which are of the same shape and are used as a pair.

The mortar retainer 1, 1' for a pipe joint according to the present invention has a horizontal mortar receiving surface 20 projecting outward from the upper end of a vertically halved cylindrical body 10. The cylindrical body part 10, the mortar receiving surface part 20, and the later-described fastening protrusion 14
is integrally molded with synthetic resin material, and its cylindrical body part 10
The inner diameter of the mortar receiving surface 20 is set to substantially match that of the pipe P, and the width of the mortar receiving surface 20 is set larger than the width of the normal pipe joint Q. Although omitted in the figure,
When the width of the mortar receiving surface 20 is large, a reinforcing connecting arm may be provided at an appropriate corner of the cylindrical body 10 and the mortar receiving surface 20.

At one end of the horizontal mortar receiving surface section 20, an overlapping surface section 21 having a thickness approximately half of the upper surface side of the horizontal mortar receiving surface section 20 is extended, and at the other end, a low step surface section 21 is provided.
2 is formed. As most clearly shown in FIG. 2, this overlapping surface portion 21 is formed by overlapping the mortar holder 1 of one pipe joint onto the low step surface portion 22 of the paired mortar holder 1' of another pipe joint, and The mortar holder 1' of the pipe joint is superposed on the low step surface part 22 of the mortar holder 1 of the pipe joint. The upper surfaces of the horizontal mortar receiving surfaces 20 and 20 are set to be on the same horizontal plane, and the extension length of the overlapping surface section 21 is set to be smaller than the length of the low step surface section 22 so as not to interfere with fastening as described later. I am doing it.

Further, at one end of the cylindrical body part 10, an overlapping surface part 11 having a thickness approximately half of the outer peripheral surface side of the horizontal mortar receiving surface part 20 is extended, and at the other end, a low step surface part for the overlapping surface part 11 to overlap. 12 is formed. The overlapping surface portion 11 and the low step surface portion 12 are connected to the overlapping surface portion 21.
Similarly, the mortar holder 1 of one pipe joint is superimposed on the lower part 12 of the mortar holder 1' of another pipe joint forming a pair, and the mortar holder 1 of the pipe joint ' is superimposed on the low step surface part 12 of the mortar holder 1 of the pipe joint, and when the thickness of the overlap surface part 11 and the depth of the low step surface part 12 are made to match, and the overlap is carried out, the outer periphery of both cylindrical body parts 10 The extended length of the overlapping surface portion 11 is set to be smaller than the length of the lower step surface portion 12 so as not to interfere with fastening, which will be described later.

Further, fastening protrusions 14 having insertion holes 13 for fastening tools 30 are arranged on the outer circumferential surface of both ends of the cylindrical body 10 . In the illustrated example, this fastener 30 has a through hole 31a in a head 31 integrally molded with a flexible band-shaped main body 32, and the main body 32 is provided on both sides of the main body 32 through which the through hole 31a is inserted. When inserted into the through hole 31a, the main body 32 is not caught in the through hole 31a.
Protrusions 32a, 32 that are hooked when coming out from a
A, 32a, etc. are used, but the insertion holes 13 of both fastening protrusions 14, 14,
13 to connect and fix the two, it goes without saying that they may be tightened with wire or screwed.

To fix the fastener 30, temporarily tighten the mortar pressers 1 and 1' at both pipe joints at an appropriate distance below the bottom surface of the slab S to the extent that they can be moved up and down. It is preferable to lift the mortar holders 1, 1' of the pipe joints until they come into contact with the lower surface of the slab S to perform final tightening. In addition, to the pipe P,
If the foamed synthetic resin sheet 60 is wound in advance, it will not only be possible to adapt the inner diameter of the cylindrical body 10 even if it is somewhat larger than the outer diameter of the pipe P, but also increase the frictional force, and furthermore, the horizontal mortar receiving surface 20 By deforming the foamed synthetic resin sheet 60, the vertical load applied to the pipe P can be converted into a force in the direction of the central axis of the pipe P, so that the pipe P can be prevented from slipping even when a large load is applied.

〓Effects of the invention〓 The present invention, as described above, has a simple structure and can be mass-produced, so it can provide a very inexpensive mortar retainer for pipe joints.

In particular, the present invention has an overlapping surface section 21 and a low step surface section 22 arranged on the horizontal mortar receiving surface section 20, so that it can be used for both small diameter piping and large diameter piping to some extent, and the horizontal mortar receiving surface sections 20, 20 are arranged in a ring with no gap. It has a disk shape and can reliably close the bottom of the pipe joint Q.

In addition, as mentioned above, this invention can be fixed to the pipe P with a simple operation, so it is possible to securely and accurately hold the mortar at the pipe joint, and it is possible to press the mortar at the pipe joint, which makes it possible to significantly reduce the work effort. This is something that can be provided.

In addition, since the mortar retainer for pipe joints of the present invention is inexpensive, compact, and has a good appearance, it is not necessary to remove the mortar from pipe joints after it has solidified, which can halve the work effort. It is something.

In addition, not only can changes in the diameter of the pipe P be coped with depending on the degree of overlapping between the overlapping surface portion 11 and the low-step surface portion 12, but also by setting this overlapping portion widely, it is possible to prevent the local concentration of the tightening force and ensure reliability. It is possible to provide a mortar retainer for pipe joints that can be fastened to the pipe P without the risk of damage or deformation when the pipe P is fastened.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the mortar presser for pipe joints of the present invention, Fig. 2 is a partially cutaway front view showing the state of use, and Fig. 3 is a partially cutaway front view illustrating a conventional construction method. 10...Cylinder part, 11...Overlapping surface part, 12...
Small outer diameter step surface portion, 13...Insertion hole, 14...Tightening protrusion, 20...Mortar receiving surface portion, 21...Overlapping surface portion, 22...Low step surface portion, 30...Fastening tool.

Claims (1)

[Claims for Utility Model Registration] A horizontal mortar receiving surface portion 20 protruding outward is provided at the upper end of the vertically halved cylindrical portion 10, and one end of the horizontal mortar receiving surface portion 20 is provided with a horizontal mortar receiving surface portion 20 projecting outward. An overlapping surface portion 21 having a thickness approximately half of the upper surface side of the surface portion 20 is extended, a low-step surface portion 22 is formed at the other end, and one end of the cylindrical body portion 10 is provided with an overlapping surface portion 21 having a thickness approximately half of the upper surface side of the horizontal mortar receiving surface portion 20 . A half-thick overlapping surface portion 11 is extended, a low step surface portion 12 is formed at the other end for the overlapping surface portion 11 to overlap, and fasteners 30 are provided on the outer peripheral surface portions of both ends of the cylindrical body portion 10.
A mortar holder for a pipe joint, which is provided with a fastening protrusion 14 having an insertion hole 13.