JPS6346596Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an end closure cover for a penetrating sleeve.
Specifically, for the penetration sleeve that is buried to form a penetration hole in a concrete structure, it can be used as a lid to close both ends of the penetration sleeve that has been installed in the formwork in advance to prevent concrete from flowing in and is easy to handle. are trying to provide.

Conventional end-closure lids for through-sleeves simply involve closing the end of the through-sleeve by simply bringing a flat plate such as a steel plate into contact with the end face of the through-sleeve.Due to construction errors, concrete pouring pressure, etc. Concrete easily flows into the interior through the gap between the holes and the holes, resulting in a dirty finish.

For this reason, currently, after concrete is poured, it is necessary to cut and remove concrete pieces that have flowed into the through sleeve and hardened, or to repair the area around the end face of the through sleeve, which results in a lot of waste during construction, and improvements are desired.

Therefore, in this invention, we have solved the above-mentioned conventional drawbacks, completely preventing concrete from flowing into the through-sleeve, reducing the need for rework around the end face of the through-sleeve, and streamlining construction. Its structure is that the entire body is made of an elastic material and is formed into a substantially plate shape, and has an outer diameter that is the same as or slightly larger than the inner diameter of the small opening at both ends of the through-sleeve, and has a large number of grooves on the outer periphery. It is characterized in that a tapered part is formed at the outer periphery tip on the side that is inserted into the penetrating sleeve, and further, a through hole for the separator shaft is formed in the center part.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

Reference numeral 1 denotes an opening cover, which is in the form of a thick plate made of an elastic material such as synthetic resin foam or synthetic rubber that can be elastically deformed, and has an outer diameter that is the same as or slightly larger than the inner diameter of the openings at both ends of the penetrating sleeve 2. It has
For example, the outer diameter of the lid 1 is approximately 2 mm larger than the inner diameter of the small opening of the penetrating sleeve 2, and the thickness of the lid 1 is 30 mm.
A diameter of about mm is used, but in actual practice, it is made to an appropriate size according to the diameter of the through sleeve 2, and it is also possible to use a rectangular or other irregular shape other than circular to match the cross-sectional shape of the through sleeve 2. be.

On the outer periphery of the lid 1, a tapered part 10 for insertion consisting of a chamfer, taper, radius, etc. is formed on the tip end on the side to be inserted into the penetration sleeve 1, so that it can be easily inserted into the edge of the penetration sleeve 1. . Also lid 1
A large number of grooves 11 are formed on the entire outer periphery. Note that if the concave groove 11 is formed in a tapered shape that becomes larger toward the fitting tapered part 10 at the tip, fitting into the sleeve 2 becomes even easier (see FIG. 1).

In addition, a through hole 12 is formed in the center of the lid 1 through which the shaft 60 of the separator 6 for tightening the formwork can be inserted. The separator shaft 60 is formed into a tapered shape that gradually increases in size toward the end (when inserted into the sleeve), thereby making it easier to insert the separator shaft 60 and improving the adhesion with the shaft 60.

Furthermore, the outer periphery and the through hole 12 on the inner side of the lid 1
By hollowing out the middle part excluding the periphery in an annular shape to form the concave part 13, it is possible to easily deform the outer periphery of the lid 1 when inserting or removing the lid 1 into the penetrating sleeve 2, and to prevent material from being stolen. It also saves money (see Figure 2).

Next, the construction process of the penetrating sleeve 2 using the edge closing lid 1 as described above will be sequentially explained.

First, after the erection of the steel frame of a building, etc. is completed, the penetration sleeve 2, which has been appropriately cut in advance to match the width of the concrete beam 3, etc., is inserted into the hole of the steel beam 4 and set in a predetermined position. Further, reinforcement reinforcement work around the penetrating sleeve 2 is done. The penetrating sleeve 2 is a steel tube or paper tube (sonoboid).
etc. are used.

Next, the fitting tapered parts 10 at the tip of the lid 1 are lightly fitted into both ends of the penetrating sleeve 2 to the extent that they do not fall off, and the opening of the penetrating sleeve 2 is temporarily closed. Thereafter, a formwork 5 for pouring concrete is erected and tightened so as to come into contact with the outer surface of the lid 1. When installing the separator 6 used to tighten and hold the formwork 5, insert the separator shaft 6 into the through hole 12 of the lid 1.
0 can be inserted through it, so it is possible to directly tighten the formwork 5 on both sides of the penetrating sleeve 2 with the separator 6.

By tightening the mold 5 with the separator 6, the lids 1 on both sides are pushed into the through sleeve 2 and are tightly fitted without any gaps, and the inner surface of the mold 5 and the lid 1 are also tightly fitted without any gaps. It will be possible. In addition to tightening the formwork 5 until it contacts the end surface of the through-sleeve 2 and completely fitting the lid 1 into the through-sleeve 2 (see the right end part in Figure 3), it is also possible to only fit the lid 1 halfway. It is also possible to leave a slight gap between the end surface of the penetrating sleeve 2 and the inner surface of the formwork 5 (see the left end part in Fig. 3).
In this way, the end surface of the through sleeve 2 can be prevented from being exposed to the outside of the through hole formed after concrete is poured. The distance between the end face of the penetrating sleeve 2 and the inner surface of the formwork 5 is from a minimum of 0 mm to a maximum of 20 mm.
It can be carried out within a range of about mm. Even if the formwork 5 and the through-sleeve 2 are not in close contact with each other as described above, the lid 1 and the through-sleeve 2 and the lid 1 and the inner surface of the formwork 5 are in close contact with each other without any gaps, so that concrete does not flow completely. It can be prevented.

Then, concrete is poured in this state, and after the concrete has solidified, the formwork 5 and separator 6 are removed, and the lid 1 is removed from the penetration sleeve 2, thereby forming a through hole in the concrete structure 3. Regarding the removal of the lid 1, if the lid 1 is not to be reused, it can be cut and removed.In this case, the lid 1 may be made of synthetic resin foam that is inexpensive and easy to cut. It is preferable to leave it there. Further, when removing the lid 1 from the penetrating sleeve 2, it is convenient and easy to pull the lid 1 by hooking your finger on the through hole 12 at the center of the lid 1.

According to the edge closing lid 1 of this invention configured as described above, it is made of an elastic body with excellent deformability,
Since a large number of concave grooves 11 are formed on the outer periphery and a tapered part 10 is formed at the outer periphery tip on the side where it is inserted into the penetrating sleeve 2, it is easy to fit into the small opening of the penetrating sleeve 2, and it can also be fitted into the penetrating sleeve 2. In this case, the outer periphery of the lid 1 is easily deformed, and errors and variations in the inner diameter of the sleeve can be easily accommodated.
It absorbs dimensional errors and variations in the through sleeve 2 and allows it to be fitted tightly and securely, and there is no gap at the end of the through sleeve 2, completely preventing concrete from flowing into the through hole after concrete is poured. There is no need for any surrounding repair work.

In particular, when fitting the lid 1 into the through-hole 2 by tightening the formwork 5, even if there is some construction error in the formwork 5 or the through-sleeve 2, the amount of insertion of the lid 1 into the through-hole 2 will be reduced. Since it can be adjusted freely, the inner surface of the formwork 5 and the lid 1 can always be brought into close contact with each other without any gaps.

Furthermore, since a through hole 12 for inserting the separator shaft 60 is formed in the center of the lid 1, the formwork 5 on both sides of the penetrating sleeve 2 can be securely and securely tightened directly with the separator 6, and concrete This is preferable since there is no fear that a gap will be created between the formwork 5 and the through-sleeve 2 or the lid 1 due to the driving pressure during installation.

Furthermore, a lid 1 made of an elastic material such as synthetic resin foam
It is much lighter and cheaper than conventional iron plates, etc., and exhibits various excellent effects such as greatly contributing to reducing overall work costs.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of this invention; FIG. 1 is a perspective view, FIG. 2 is a sectional view of the main part when fitting into the sleeve, and FIG. 3 is a schematic sectional view of the installed state. 1... Lid, 10... Tapered part, 11... Concave groove,
12... Through hole, 13... Recessed portion, 2... Penetrating sleeve, 3... Concrete structure, 4... Steel beam, 5... Formwork, 6... Separator, 60... Separator shaft.

Claims (1)

[Claims for Utility Model Registration] 1. The entire body is made of an elastic material and is formed into a substantially plate shape, and has an outer diameter that is the same as or slightly larger than the inner diameter of the small opening at both ends of the penetrating sleeve, and has a number of grooves formed on the outer periphery. An edge closing lid for a penetrating sleeve, characterized in that a tapered part is formed at the outer peripheral tip on the side to be inserted into the penetrating sleeve, and further a through hole for a separator shaft is formed in the center part. 2. The through hole for the separator shaft is formed in a tapered shape that becomes larger toward the side where it is inserted into the penetrating sleeve.
The end closure lid for the through-sleeve described in section 1. 3. The edge closing lid for a penetrating sleeve according to claim 1, wherein an annular recess is formed on the inner surface of the penetrating sleeve that is inserted into the penetrating sleeve.