Method for covering sleeve pipe opening

Abstract

To provide a method of covering a sleeve pipe opening capable of covering the opening of the sleeve pipe easily and suitably.SOLUTION: A covering body 4 having a body part 4a in a bag shape and an extendable annular fastening part 4b mounted to an edge of the body part 4a is mounted so as to cover a whole sleeve lid 2 fitted in an end 1a of a sleeve pipe 1 to form a sleeve using the sleeve pipe 1. A shower cap may be used as the covering body 4. In addition, the covering body 4 may be fixed to the sleeve pipe 1 using an adhesive body.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a method for covering an opening at an end of a sleeve pipe during construction such as pouring concrete. [Background technology]

[0002] When pouring concrete for the floors of buildings, etc., holes called sleeves are sometimes made to allow electrical wiring, water pipes, etc. to pass through. Such sleeves are formed by fixing a sleeve pipe (a paper pipe called a void, a PVC pipe, an iron pipe, etc.) with nails or the like at the desired position to the deck plate, which is also part of the formwork or composite floor and is also the formwork, pouring concrete around it after reinforcing bars have been placed, and removing the sleeve pipe if necessary after the concrete has hardened.

[0003] During the series of pouring operations, the opening at the end of the sleeve pipe needs to be appropriately sealed to prevent concrete from entering the sleeve pipe, to prevent workers from accidentally putting their hands or feet inside and falling, or to prevent objects from falling to the floor below. Specialized covers (hereinafter referred to as sleeve covers) are commercially available as members for sealing the opening of the sleeve pipe, and in many cases, such commercially available sleeve covers are used.

[0004] However, a typical sleeve cover does not have a function to seal the opening of the sleeve pipe, and cannot completely prevent the intrusion of concrete. In addition, on floors other than pipe shafts (PS) and machine rooms, the sleeve cover is directly covered with concrete, so it is necessary to scrape off the concrete attached to the surface of the cover after pouring the concrete. Therefore, the opening is blocked with adhesive tape for sleeves installed in any location. For example, after fitting the sleeve cover into the opening of the sleeve pipe, multiple pieces of curing tape cut into strips are applied from the end of the sleeve pipe to the surface of the sleeve cover to cover it. The gap between the end of the sleeve pipe and the sleeve cover is sealed with the curing tape, so that the intrusion of concrete can be reliably prevented. Alternatively, if the diameter of the sleeve pipe is relatively small, a dedicated commercially available product called pipe sealing tape is cut into a square shape and applied to the opening instead of the sleeve cover. This also allows the opening of the sleeve pipe end to be sealed.

[0005] Incidentally, examples of documents that describe the formation of such a sleeve and the technology for closing the opening of the sleeve pipe include Patent Document 1 listed below. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 7-15221 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the above-mentioned covering method using adhesive tape has a problem that it takes time and effort to apply and remove the tape. In particular, when using masking tape for a sleeve pipe with a large diameter, it is necessary to prepare and apply many strips of masking tape, which is a tedious task. Furthermore, depending on the site, similar work may be required for many sleeve pipes (for example, in a machine room, it is necessary to pass many pipes and wires through the floor and walls, and many sleeves must be formed when pouring concrete), and especially at such sites, the amount of work required to cover the opening of the sleeve pipe becomes enormous.

[0008] In addition, if adhesive remains on the sleeve lid or sleeve pipe after the tape is removed, it will look bad, and if the sleeve lid is covered with masking tape, the warning notice on the surface of the sleeve lid will be difficult to see. Furthermore, if the sleeve pipe or sleeve lid gets wet with rainwater, etc., the adhesive tape will not stick properly.

[0009] In view of the above circumstances, the present invention aims to provide a method for covering an opening of a sleeve pipe, which can cover the opening of the sleeve pipe simply and suitably. [Means for solving the problem]

[0010] In the present invention, when forming a sleeve using a sleeve pipe, A method for covering an opening of a sleeve tube, comprising fitting a sleeve lid to an end of the sleeve tube and covering the end of the sleeve tube together with the sleeve lid with a covering body, comprising: The covering body includes a bag-shaped main body and an expandable annular fastening portion attached to an edge of the main body, The sleeve cover has a portion that protrudes beyond the end of the sleeve tube with a larger outer diameter, When the end of the sleeve tube is covered with the sleeve lid by the covering body, the annular fastening portion is attached and is caught on the large protruding portion of the sleeve lid. The present invention relates to a method for covering an opening of a sleeve pipe, characterized in that

[0012] In the method for covering an opening of a sleeve tube of the present invention, a shower cap can be used as the covering body.

[0013] In the method for covering an opening of a sleeve pipe of the present invention, after the covering body is attached to the end portion of the sleeve pipe, the covering body may be further fixed to the sleeve pipe using an adhesive. Effect of the Invention

[0014] According to the method for covering an opening of a sleeve pipe of the present invention, it is possible to obtain the excellent effect of simply and suitably covering the opening of a sleeve pipe. [Brief description of the drawings]

[0015] [Figure 1] 4 is a flowchart showing an example of a procedure for forming a sleeve using the method for covering an opening of a sleeve pipe of the present invention. [Diagram 2] FIG. 4 is a perspective view showing a state in which a sleeve lid is attached to an opening of a sleeve tube. [Diagram 3] 4 is a cross-sectional view showing a state in which a sleeve cover is attached to an opening of a sleeve tube. FIG. [Figure 4] 1 is a perspective view showing a state in which a sleeve cover is attached to an opening of a sleeve tube and a cover is further attached. FIG. [Diagram 5] 1 is a cross-sectional view showing a state in which a sleeve cover is attached to an opening of a sleeve tube and a cover is further attached. [Figure 6] FIG. 11 is a perspective view showing a state in which an adhesive body is further attached to an edge portion of the covering body. [Figure 7] A cross-sectional view showing the state in which concrete has been poured around the sleeve pipe. [Figure 8] FIG. 13 is a diagram showing the removal of the covering body after concrete has been poured. [Figure 9] FIG. 11 is a perspective view showing another application example of the method for covering an opening of a sleeve pipe of the present invention, showing the case where it is applied to a through sleeve of a beam material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0017] Fig. 1 is a flow chart showing an example of a procedure for forming a sleeve using the method for covering the opening of a sleeve pipe of the present invention, and Figs. 2 to 8 show the state of the periphery of the sleeve pipe in each step. In the example shown here, it is assumed that a sleeve is formed on the floor of a building.

[0018] First, the sleeve pipe is placed at the desired position (Step S1). The sleeve pipe is fixed to the formwork that will form the floor, such as a wooden formwork or a deck plate, at a predetermined position avoiding the reinforcement that has already been placed, using nails, etc. Next, the sleeve lid is attached to the opening at the top end of the sleeve pipe (Step S2).

[0019] The state of the sleeve tube at this stage is shown in Fig. 2 and Fig. 3. The sleeve tube 1, whose central axis is arranged along the vertical direction, has openings at the top and bottom ends, and the sleeve cover 2 is attached to the opening 1b of the upper end 1a. The sleeve cover 2 is a disk-shaped part with a portion whose outer diameter is larger than the sleeve tube end and has a protrusion 2b protruding from one side of the disk-shaped main body 2a. The outer diameter of the main body 2a is set to be at least larger than the inner diameter of the sleeve tube 1. The protrusion 2b is, for example, a cylindrical member with an outer diameter slightly larger than the inner diameter of the sleeve tube 1. When the protrusion 2b is inserted into the opening 1b of the sleeve tube 1, the protrusion 2b is compressed radially inward by the member constituting the end 1a of the sleeve tube 1 and deformed, and the outer peripheral surface of the protrusion 2b is pressed against the inner peripheral surface of the sleeve tube 1 by the repulsive force of the protrusion 2b trying to return to its original shape, and the sleeve cover 2 is fixed to the sleeve tube 1. It should be noted that the shape and mechanism of the sleeve lid shown here are merely examples, and various other configurations of products can be used as the sleeve lid as long as they can be properly attached to the opening of the sleeve tube.

[0020] Since there may be openings that span multiple floors inside the sleeve pipe 1, in order to enhance safety, a warning label 3 including characters such as "Caution when opening" or an appropriate symbol may be provided on the sleeve cover 2 as necessary. In the example shown in Figures 2 and 3, a sticker with a warning label printed thereon is affixed as the warning label 3 to the top surface of the main body 2a.

[0021] 4 and 5, the cover 4 is attached to this (step S3). The cover 4 is configured to include a bag-shaped main body 4a and a fastening portion 4b attached to the edge of the main body 4a.

[0022] The main body 4a is a bag-shaped portion formed using a sheet-like material that is impermeable to liquids. For example, resin is a suitable material for the main body 4a, and when a warning display 3 is provided on the sleeve lid 2 as shown in Figures 2 to 5, it is more preferable for the material to be transparent so that the warning display 3 can be seen through the main body 4a. The fastening portion 4b is a stretchable ring-shaped member attached to the edge of the bag-shaped main body 4a, such as a rubber cord.

[0023] Such a covering body 4 is attached to the sleeve pipe 1 as shown in Figs. 4 and 5. In this state, the main body 4a covers the entire opening 1b together with the sleeve lid 2. The tightening part 4b is attached so as to surround the circumference of the end 1a of the sleeve pipe 1, tightening the end 1a by elastic force, and supporting the entire covering body 4 against the sleeve pipe 1. The edge of the main body 4a of the bag-shaped covering body 4 is in close contact with the outer circumferential surface of the sleeve pipe 1 with almost no gap due to the elastic force of the tightening part 4b. This makes it possible to effectively prevent concrete from entering the sleeve pipe 1. Since a normal sleeve lid 2 is not designed to seal the opening 1b, it is difficult to completely prevent the intrusion of concrete, but if the covering body 4 is attached in a manner that covers the gap between the sleeve lid 2 and the sleeve pipe 1 as in this embodiment, the intrusion of concrete can be prevented by a simple procedure.

[0024] As described above, in the past, when forming a sleeve, the entire end of the sleeve pipe to which the sleeve lid was attached was covered with masking tape, or the end of the sleeve pipe was sealed with pipe sealing tape. However, such methods had problems such as troublesome application and removal of the tape, sticky residue remaining after removal of the tape, and the inability to apply the tape if the sleeve pipe or sleeve lid was wet. In the method using the covering body 4 as in this embodiment, the work of covering the end of the sleeve pipe 1 is very simple, since it is only necessary to cover the end 1a of the sleeve pipe 1 with the covering body 4. In particular, in the case of construction of a machine room, for example, a considerable amount of work can be reduced at a site where a large number of sleeves need to be formed. Moreover, since the covering body 4 is attached by the elastic force of the fastening portion 4b, there is no problem with the attachment even if the sleeve pipe 1 is wet, and there is no worry of sticky residue remaining after removal. In addition, if the main body portion 4a is transparent, the covering body 4 does not interfere with the visibility of the warning display 3.

[0025] Incidentally, to explain the dimensions of the fastening portion 4b in particular, the overall length of the fastening portion 4b must be extended by an external force to at least the diameter of the end portion 1a of the sleeve tube 1 and the diameter of the sleeve cover 2. In addition, when no external force is applied, the overall length of the fastening portion 4b must be smaller than the diameter of the end portion 1a of the sleeve tube 1.

[0026] It is particularly convenient to use a commercially available shower cap as the covering 4. A shower cap is a product originally designed for waterproofing, with the main body 4a being made of a material that does not allow liquids to pass through, and the fastening portion 4b being designed to fasten the object with a moderate elastic force. For this reason, it is suitable for the purpose of being attached to the end 1a of the sleeve pipe 1 to prevent the intrusion of concrete, and is inexpensive. When using a shower cap as the covering 4, it is appropriate to use a sleeve pipe 1 with a diameter of about 20 cm, although this depends on the dimensions and materials of the main body 4a and fastening portion 4b that constitute the shower cap.

[0027] After the covering body 4 is attached as shown in Figures 4 and 5, the edge of the main body part 4a may be fixed with an adhesive 5 as shown in Figure 6, if necessary (step S4). For example, this is effective as a simple measure to prevent the covering body 4 from coming off the sleeve pipe 1 in a site where there is a concern that the covering body 4 may be blown away by the wind, or in a case where the outer periphery of the sleeve lid 2 does not protrude radially from the outer periphery of the sleeve pipe 1 to a small extent, and the fastening part 4b of the covering body 4 may easily exceed the outer periphery of the sleeve lid 2 and come off. Even in this case, the covering work requires less effort than the conventional method of covering the entire sleeve lid 2 with masking tape, and even if there is any adhesive remaining after removal, it is kept to a minimum.

[0028] An adhesive tape such as masking tape can be used as the adhesive body 5. The adhesive body 5 may be attached over the entire periphery so as to cover the entire edge of the covering body 4 located on the outer periphery of the end portion 1a of the sleeve pipe 1, or only a part of the edge of the covering body 4 may be fixed to the surface of the sleeve pipe 1. As long as the covering body 4 can be suitably attached to the sleeve pipe 1, the fixing form by the adhesive body 5 may be any form.

[0029] Next, as shown in Fig. 7, concrete 6 is poured around the sleeve pipe 1 without any gaps while applying vibration to compact the concrete so that it covers the reinforcing bars arranged to form the floor slab (step S5). In the case of Fig. 7, the concrete 6 is poured on the floor surface of the PS or machine room, and the top surface of the concrete 6 is at a lower level than the upper end of the sleeve pipe 1. At this time, the cover 4 is attached to the end 1a of the sleeve pipe 1 and the sleeve cover 2, so that the concrete 6 is prevented from directly adhering to the end 1a of the sleeve pipe 1 or the sleeve cover 2. In addition, while the concrete 6 is curing, the intrusion of concrete and rainwater into the opening 1b of the sleeve pipe 1 is prevented.

[0030] After the concrete 6 has been cured, the covering body 4 is removed as shown in FIG. 8 (step S6). This operation is very easy, since it is only necessary to pull the covering body 4. Even if a part of the concrete 6 is attached to the covering body 4 when the concrete 6 is poured, it easily falls off when the covering body 4 is removed. In addition, if no adhesive is used to fix the covering body 4, there is no need to worry about adhesive remaining on the sleeve pipe 1 or sleeve cover 2, and even if an adhesive body 5 is used as shown in FIG. 6, it is only necessary to remove the minimum amount of adhesive body 5 used, so it is also less work and there is little adhesive remaining. The removed covering body 4 can be disposable (a shower cap is inexpensive, so the cost burden is very small), or it can be reused if it is not dirty or damaged.

[0031] After removing the covering 4, if the sleeve pipe 1 is a paper void, it is removed from the hardened concrete 6, but if the sleeve pipe 1 is made of PVC or steel, it is left in place, completing the formation of the sleeve.

[0032] Although the above example shows a case where a sleeve is formed when pouring concrete 6 to form a floor, a similar method can be widely applied when it is necessary to cover the end of the sleeve pipe when forming a sleeve in a portion other than a floor using the sleeve pipe. For example, a sleeve may be provided to a steel frame or the like that constitutes a beam of a steel-framed building so as to penetrate the steel frame. FIG. 9 shows an example of a sleeve pipe in such a case, in which a sleeve pipe (penetrating sleeve) 8 made of an iron pipe or the like is provided so as to penetrate horizontally a beam material 7 that is a steel frame. In some cases, a fireproof material (not shown) such as rock wool may be sprayed onto such beam material 7. In this case, for example, the end of the sleeve pipe 8 may be covered with a sleeve cover 9, and the entire end of the sleeve pipe 8 to which the sleeve cover 9 is attached may be covered with a covering body 10 similar to the covering body 4 shown in FIG. 4 and FIG. 5. In addition, the edge of the covering body 10 may be fixed with an adhesive body 11 as necessary. In this way, when the fireproof material (not shown) is sprayed, it is possible to prevent the fireproof material from adhering to the end of the sleeve pipe 8 or the sleeve cover 9 or from penetrating into the inside of the sleeve pipe 8.

[0033] As described above, in the present embodiment, when forming a sleeve using the sleeve pipe 1, the cover 4 having the bag-shaped main body 4a and the expandable annular fastening portion 4b attached to the edge of the main body 4a is attached so as to cover the sleeve lid 9 fitted onto the end portion 1a of the sleeve pipe 1. In this way, the opening 1b of the sleeve pipe 1 can be covered in a simple procedure, and the intrusion of concrete can be prevented.

[0034] In the method for covering an opening of a sleeve tube of the present invention, a shower cap can be used as the covering body 4, and in this way, the above method can be carried out using an inexpensive commercially available product.

[0035] In the method of covering the opening of a sleeve pipe of the present invention, it is preferable that the sleeve cover 2 has a portion that protrudes with a larger outer diameter than the end of the sleeve pipe, and that the annular fastening portion 4b is caught after being attached.In this way, the intrusion of concrete at the end 1a of the sleeve pipe 1 of the covering body 4 can be even more effectively prevented.

[0036] In the method of covering the opening of a sleeve tube of the present invention, after the covering body 4 is attached to the end 1a of the sleeve tube 1, the covering body 4 can be further fixed to the sleeve tube 1 using an adhesive body 5, which makes it easy to prevent the covering body 4 from coming off the sleeve tube 1.

[0037] Therefore, according to the present embodiment, the opening of the sleeve pipe can be covered simply and suitably.

[0038] Incidentally, the method of covering the sleeve tube opening of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the gist of the present invention, for example, the sleeve lid and warning signs are not necessarily required. [Explanation of symbols]

[0039] 1 Sleeve tube 1a end 2 Sleeve Lid 4 Covering body (shower cap) 4a Main body 4b Fastening part 5. Sticky

Claims

1. A method for covering an opening of a sleeve tube, comprising the steps of: fitting a sleeve lid to an end of the sleeve tube; and covering the end of the sleeve tube together with the sleeve lid with a covering body, the method comprising the steps of: The covering body includes a bag-shaped main body and an expandable annular fastening portion attached to an edge of the main body, The sleeve cover has a portion that protrudes beyond the end of the sleeve tube with a larger outer diameter, When the end of the sleeve tube is covered with the sleeve lid by the covering body, the annular fastening portion is attached and is caught on the large protruding portion of the sleeve lid. A method for covering an opening of a sleeve pipe, comprising:

2. The covering body is a shower cap.

2. The method for covering an opening of a sleeve pipe according to claim 1,

3. After the covering body is attached to the end of the sleeve tube, and further fixing the covering body to the sleeve tube using an adhesive.

3. The method for covering an opening of a sleeve pipe according to claim 1 or 2, further comprising the steps of:

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