JP5686654B2 - Penetration structure forming tool and method of forming penetration structure using the same - Google Patents

Description

  The present invention relates to a penetration structure forming tool for forming a through hole in a concrete structure and a method for forming a penetration structure using the penetration structure forming tool.

  Conventionally, a sleeve for forming a through hole in a concrete structure is known (see Patent Document 1). Further, a penetration structure forming tool including such a sleeve and a packing as a sealing member for sealing a gap between an inner surface of the through hole and an outer surface of a pipe disposed in the through hole is known (Patent Document 1). reference). The penetrating structure forming tool of Patent Document 2 includes a holder that is externally fitted to a sleeve, and is configured such that a packing is externally fitted to the holder. Then, after placing the concrete structure, the holder and the sealing member are fixed to the concrete structure by removing the sleeve. The removed sleeve can be reused.

JP 2004-244986 A JP 2008-285955 A

  In Patent Document 2, a sleeve and a sealing member are connected by a holder, and the holder is not removed and remains in the concrete structure. Here, in the penetration structure forming tool, increasing the number of reusable members is advantageous from the viewpoint of environmental friendliness. For example, when an attempt is made to reuse the holder by removing the holder from the concrete structure, there is no possibility that the concrete to be supported from the inner surface of the sealing member is present, so that the sealing member may be easily detached.

  The present invention has been made in view of such circumstances, and an object of the present invention is to increase the number of reusable members and easily form a penetration structure forming tool that makes it difficult to remove the sealing member from the concrete structure. And a method of forming a penetration structure using the same.

  In order to achieve the above object, a penetration structure forming tool according to claim 1 is provided in a through hole forming member for forming a through hole in a concrete structure, an inner surface of the through hole, and the through hole. A sealing member that seals a gap between the insertion member and an outer surface of the insertion member, and a connecting member that connects the through hole forming member and the sealing member, and the through hole is formed after the concrete structure is formed. A penetration structure forming tool that forms a penetration structure in which the sealing member is fixed by removing the forming member and the connecting member, and the sealing member has an insertion hole through which the insertion member is inserted. A sealing part main body, a peripheral wall standing on the sealing part main body, and a flange part projecting outward from the peripheral wall are provided, and the connecting member is attached to the inner side of the peripheral wall so as to be separated from the peripheral wall. The inner circumference of the peripheral wall And summarized in that the concrete enters configuration between the outer peripheral surface of the connecting member.

  According to this configuration, the through hole forming member and the connecting member removed after the concrete structure is formed can be reused. In addition, the connecting member is configured to be separated from the peripheral wall inside the peripheral wall of the sealing member and attached to the sealing member, so that the concrete enters between the inner peripheral surface of the peripheral wall and the outer peripheral surface of the connecting member. ing. As a result, the peripheral wall and the flange portion provided on the peripheral wall are supported by the concrete structure. As a result, the flange portion is prevented from coming out of the concrete structure.

The gist of the invention described in claim 2 is that, in the penetration structure forming tool according to claim 1, the peripheral wall and the flange portion are provided over the entire circumference of the sealing portion main body.
According to this configuration, in the sealing member, the number of portions supported by the concrete structure increases, and as a result, the flange portion is further suppressed from coming out.

  Invention of Claim 3 is the penetration structure formation tool of Claim 1 or Claim 2, The said connection member has a convex part inserted in the insertion hole which the said sealing member has, The said The gist is that the connecting member and the sealing member are connected.

According to this structure, a sealing member and a connection member can be connected by inserting the convex part which a connection member has in the penetration hole which a sealing member has.
A method for forming a penetrating structure according to a fourth aspect of the invention is a method for forming a penetrating structure using the penetrating structure forming tool according to any one of the first to third aspects, wherein the first formwork The through hole forming member is directed to the second mold frame facing the first mold frame, and the sealing member is directed to be sandwiched between the first mold frame and the second mold frame. A through structure forming tool is disposed, and after placing concrete between the first mold frame and the second mold frame, the through hole forming member and the connecting member are made into a concrete structure by hitting the connecting member. The gist is to extrude from the body.

  According to this method, the through hole forming member and the connecting member can be removed smoothly.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to increase the number of reusable members, the penetration structure forming tool which makes it easy to remove a sealing member from a concrete structure, and the formation method of a penetration structure using the same are provided. Is done.

The disassembled perspective view which shows the penetration structure formation tool in embodiment. Sectional drawing which shows a penetration structure formation tool. (A) is sectional drawing which shows the penetration structure forming tool arrange | positioned in a formwork, and the placed concrete, (b) is sectional drawing which shows a penetration structure forming tool and a foundation. Sectional drawing which shows the state which removed the member for through-hole formation, and a connection member from the foundation. (A) And (b) is a perspective view which shows the example of a change of a sealing member. (A) is principal part sectional drawing which shows the example of a change of the connection structure connected with a connection member and a sealing member, (b) is a perspective view which shows the example of a change of the connection structure connected with a connection member and a sealing member.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1 and FIG. 2, the penetrating structure forming tool 11 is connected to a cylindrical through hole forming member 21 and an annular sealing member 31 by a connecting member 41 having a disc shape. It is configured to be. The penetration structure forming tool 11 of the present embodiment forms a penetration structure that penetrates the foundation when the foundation is formed by placing concrete. The penetration structure forming tool 11 is arranged before placing the concrete, and after the foundation is formed, the penetration structure forming tool 11 and the connecting member 41 are removed so that the penetration structure with the sealing member 31 fixed is removed. It is formed.

  The through-hole forming member 21 has a main body portion 22 having an open front end and a base end wall 23 erected at the base end of the main body portion 22. The main body portion 22 is formed in a tapered shape whose diameter increases from the proximal end toward the distal end. A fitting hole 23a communicating with the inside of the main body 22 is formed in the center of the base end wall 23, and the first connecting convex portion 42 of the connecting member 41 is fitted into the fitting hole 23a. ing. The through hole forming member 21 is integrally formed from a resin material. Examples of the resin material include olefin resin, vinyl chloride resin, styrene resin, ester resin, amide resin, and carbonate resin.

  The sealing member 31 includes a sealing portion main body 32 having an insertion hole 32a, a peripheral wall 33 standing on the sealing portion main body 32, and a flange portion 34 protruding outward from the peripheral wall 33. Yes. The peripheral wall 33 is provided over the entire periphery of the outer edge of the main body 22, and the flange portion 34 is provided over the entire periphery of the distal end edge of the peripheral wall 33. Since the sealing member 31 is integrally formed from a rubber-based material, it has flexibility and water resistance. Examples of rubber materials include elastomers such as olefin elastomers and urethane elastomers, and rubbers such as acrylonitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR).

  The connecting member 41 has an outer shape that can contact the proximal end wall 23. As shown in FIG. 2, the connecting member 41 has a second connecting protrusion 43 that protrudes from a surface opposite to the first connecting protrusion 42. By inserting the second connection convex portion 43 into the insertion hole 32a, the connection member 41 and the sealing member 31 are connected. Specifically, as shown in an enlarged view in FIG. 2, the second connecting convex portion 43 is inserted into the insertion hole 32a, and the outer peripheral surface of the second connecting convex portion 43 and the insertion hole that is elastically deformed. It will be in the close fitting state with the inner peripheral surface of 32a. Such a 2nd connection convex part 43 has the flat front end wall 43a which plugs up the insertion hole 32a. The tip wall 43a can be used as an operation surface for performing an operation of hitting with a hammer or the like when the through hole forming member 21 and the connecting member 41 are removed from the foundation.

  The connecting member 41 is integrally formed from a resin material in the same manner as the through hole forming member 21. Specific examples of the resin material constituting the connecting member 41 include those exemplified as the resin material constituting the through hole forming member 21. The connection member 41 is made of a material harder than the through hole forming member 21, so that the durability can be enhanced when the tip wall 43 a is used as the operation surface. In the present embodiment, the through hole forming member 21 is made of polypropylene, while the connecting member 41 is made of polycarbonate that is harder than the polypropylene. Further, since the through-hole forming member 21 is softer than the connecting member 41, it is easy to fit the first connecting convex portion 42 into the fitting hole 23a.

  Next, details of a state in which the through hole forming member 21 and the sealing member 31 are connected by the connecting member 41 will be described. The outer diameter of the base end of the through hole forming member 21 and the outer shape of the connecting member 41 are formed to have substantially the same outer diameter. Thereby, the connection member 41 can be smoothly removed from the foundation. Here, when the outer diameter of the connecting member 41 is larger than the outer diameter of the base end of the through hole forming member 21, the periphery of the connecting member 41 may be caught on the foundation. For this reason, the outer shape of the base end of the through hole forming member 21 and the outer diameter of the connecting member 41 are preferably substantially the same outer diameter, and the connecting member 41 is more than the outer shape of the base end of the through hole forming member 21. It is more preferable that the external shape of is small.

  The connecting member 41 is attached inside the peripheral wall 33 so as to be separated from the peripheral wall 33. That is, a gap 51 into which concrete enters is formed between the inner peripheral surface of the peripheral wall 33 and the outer peripheral surface of the connecting member 41 so as to extend in the circumferential direction. Such a gap 51 is adjusted by setting the inner diameter of the peripheral wall 33 to be larger than the outer diameter of the connecting member 41. In this embodiment, since the peripheral wall 33 is formed over the entire circumference of the sealing portion main body 32, the gap 51 is formed over the entire circumference corresponding to the peripheral wall 33.

Next, the usage method of the penetration structure forming tool 11 will be described together with the operation.
As shown in FIG. 3A, the penetrating structure forming tool 11 is disposed at a predetermined position between the first mold 61 and the second mold 62 facing it. A reinforcing bar (not shown) is disposed between the first mold 61 and the second mold 62. The penetration structure forming tool 11 can be arranged at a predetermined position by using a support member that supports the through hole forming member 21 on the reinforcing bar. As such a support member, a member in which an annular part that supports the outer peripheral surface of the main body part 22 and a reinforcing bar support part supported by a reinforcing bar are connected by a connecting part can be used (for example, see Patent Document 1). The through hole forming member 21 may be supported by the reinforcing bar using a wire.

  In this way, the penetration structure forming tool 11 has the first mold 61 and the second mold 62 with the through hole forming member 21 facing the first mold 61 and the sealing member 31 facing the second mold 62. It arrange | positions so that it may be pinched | interposed with the formwork 62. FIG. Next, concrete is placed between the first mold 61 and the second mold 62 and cured. As a result, the concrete is hardened so as to be in close contact with the penetration structure forming tool 11, and the inside of the through hole forming member 21 becomes a cavity in which no concrete exists. At this time, the concrete enters the gap 51 and the concrete hardens also in the gap 51. Subsequently, by removing the first mold 61 and the second mold 62, a base 71 in which the penetrating structure forming tool 11 is embedded is formed as shown in FIG.

  Subsequently, the proximal end wall 23 is pressed by hitting the distal end wall 43a with a hammer or the like along the direction indicated by the arrow in FIG. 3B, and the connecting member 41 and the through hole forming member 21 are removed from the foundation 71. Extruded. Through this operation, the through hole forming member 21 and the connecting member 41 are removed from the base 71 as shown in FIG. 4, whereby a through hole 72 having one end opened by the insertion hole 32 a is formed in the base 71. The At this time, as shown in an enlarged view in FIG. 4, the outer periphery of the sealing portion main body 32, the peripheral wall 33, and the flange portion 34 are embedded in the foundation 71. Thereby, the sealing member 31 is fixed to the foundation 71. At this time, since concrete enters between the inner peripheral surface of the peripheral wall 33 and the outer peripheral surface of the connecting member 41, the concrete is also disposed inside the peripheral wall 33. As described above, the peripheral wall 33 and the flange portion 34 provided on the peripheral wall 33 are supported by the foundation 71, so that the movement of the flange portion 34 is restricted. As a result, the flange portion 34 is prevented from coming out of the foundation 71.

  The through hole forming member 21 and the connecting member 41 removed from the foundation 71 can be reused as the penetrating structure forming tool 11 by combining with the separately prepared sealing member 31. In addition, fluid or electric pipes or insertion members such as electric cables are inserted through the through holes 72 and the insertion holes 32a formed in the foundation 71. At this time, the gap between the inner surface of the through hole 72 and the outer surface of the insertion member is sealed with the sealing member 31 by setting the shape of the insertion hole 32a according to the outer shape of the insertion member. Such a sealing member 31 can suppress, for example, the entry of white ants and water.

The effects exhibited by this embodiment will be described below.
(1) The through structure forming tool 11 is configured to remove the through hole forming member 21 and the connecting member 41 after the foundation 71 is formed. Thereby, the through-hole forming member 21 and the connecting member 41 can be reused. The connecting member 41 is attached to be separated from the peripheral wall 33 inside the peripheral wall 33 of the sealing member 31, so that the concrete enters between the inner peripheral surface of the peripheral wall 33 and the outer peripheral surface of the connecting member 41. Yes. As a result, the peripheral wall 33 and the flange portion 34 provided on the peripheral wall 33 are supported by the foundation 71, and as a result, the flange portion 34 is prevented from coming out of the foundation 71. Therefore, it is possible to provide the penetrating structure forming tool 11 that can increase the number of reusable members and easily prevent the sealing member 31 from being detached from the foundation 71.

  (2) The peripheral wall 33 and the flange portion 34 are provided over the entire circumference of the sealing portion main body 32. In the sealing member 31, as a result of an increase in the number of places supported by the foundation 71, the flange portion 34 is further prevented from coming out. Therefore, it becomes easier to make it difficult to remove the sealing member 31 from the foundation 71.

  (3) The sealing member 31 and the connecting member 41 can be connected by inserting the second connecting convex portion 43 into the insertion hole 32a. By such connection, a configuration in which the connecting member 41 is attached to be separated from the peripheral wall 33 inside the peripheral wall 33 can be easily realized.

  (4) In the formation method of the penetrating structure, first, the through hole forming member 21 is directed to the first mold 61 and the sealing member 31 is directed to the second mold 62, so that the first mold 61 and the second mold The penetrating structure forming tool 11 is arranged so as to be sandwiched between the molds 62. Next, concrete is placed between the first mold 61 and the second mold 62. After that, the through hole forming member 21 and the connecting member 41 are pushed out from the foundation 71 by hitting the connecting member 41. According to this method, the through hole forming member 21 and the connecting member 41 can be removed smoothly.

In addition, the said embodiment can also be changed and comprised as follows.
The peripheral wall 33 of the sealing member 31 is erected over the entire circumference of the sealing portion main body 32, but may be partially erected on the outer peripheral edge of the sealing portion main body 32. For example, as shown in FIG. 5A, a pair of peripheral walls 33 may be erected facing each other at the outer peripheral edge of the sealing portion main body 32. Further, as shown in FIG. 5B, the peripheral wall 33 may be erected by being divided into three or more locations on the outer peripheral edge of the sealing portion main body 32. When the peripheral wall 33 is partially erected as shown in FIG. 5, the flange portion 34 is also erected partially with respect to the outer periphery of the sealing portion main body 32.

The flange portion 34 of the sealing member 31 is erected from the entire outer peripheral edge of the peripheral wall 33, but the flange portion 34 may be partially erected on the outer peripheral edge of the peripheral wall 33.
-As shown in Drawing 6 (a), the shape of the 2nd connecting convex part 43 can also be changed. This 2nd connection convex part 43 has the latching claw 43b latched to the sealing part main body 32 by protruding from the front-end edge. The locking claw 43 b suppresses the sealing member 31 from dropping from the connecting member 41. The locking claw 43 b is provided over the entire circumference at the tip edge of the second connecting convex portion 43. Note that the sealing member 31 can be prevented from falling off by being partially provided at the front end edge of the second connecting convex portion 43, but from the viewpoint of further suppressing the dropping, the entire circumference as described above. It is preferable to provide over.

  -The tip wall 43a of the second connecting convex portion 43 is not limited to a flat shape, and for example, a concave portion may be formed in the central portion. That is, you may form the 2nd connection convex part 43 in an annular | circular shape. Further, a through-hole penetrating the first connecting convex portion 42 and the second connecting convex portion 43 may be formed in the center of the tip wall 43a. However, as in the embodiment described above, the connecting member 41 preferably has a tip wall 43a that closes the insertion hole 32a, and the tip wall 43a more preferably has a flat outer surface. With this configuration, it becomes easy to hit the connecting member 41 with a hammer or the like, for example.

  -The 2nd connection convex part 43 is abbreviate | omitted, and the connection member 41 and the sealing member 31 can also be connected by changing the sealing member 31. FIG. For example, a plurality of engaging protrusions 35 are provided on the peripheral wall 33 of the sealing member 31 shown in FIG. 6B so as to be spaced apart along the inner peripheral surface thereof. The outer peripheral surface of the connecting member 41 is configured to fit inside the plurality of engaging protrusions 35. Even with this configuration, since the concrete can be configured to enter between the inner peripheral surface of the peripheral wall 33 and the outer peripheral surface of the connecting member 41, the operational effects described in (1) above can be obtained.

  -The shape of the said 1st connection convex part 42 may be changed into annular | circular shape, for example. Moreover, the 1st connection convex part 42 may be abbreviate | omitted and the member 21 for through-hole formation and the connection member 41 may be connected, for example using an adhesive tape.

  The through-hole forming member 21 and the connecting member 41 may be integrally formed from a similar resin material. In other words, the through-hole forming member 21 and the sealing member 31 may be connected by the connecting member 41 integrated with the through-hole forming member 21 in advance.

  The shape or size of the insertion hole 32a can be changed as appropriate in accordance with the shape or size of the insertion member inserted through the through hole 72. The shape of the through hole forming member 21 is not limited to a cylindrical shape, and may be changed to a cylindrical shape such as a square cylindrical shape.

  When placing the penetrating structure forming tool 11, the concrete that constitutes the foundation 71 is formed by performing a mold release treatment using a mold release agent or the like on the outer peripheral surface of the through hole forming member 21 and the outer peripheral surface of the connecting member 41. You may reduce the adhesiveness of. Thereby, the through hole forming member 21 and the connecting member 41 can be smoothly removed from the foundation 71.

  -Although the said penetration structure forming tool 11 is used for the use which forms a penetration structure in the foundation 71, it is not limited to this, For example, it changes as a penetration structure formation tool used for concrete structures, such as a concrete wall body. You can also.

Next, the technical idea that can be grasped from the above embodiment will be described below.
(A) The connecting member is configured to include the convex portion inserted into the insertion hole of the sealing member, so that the connecting member and the sealing member are connected, and the convex portion is A penetration structure forming tool having a tip wall that closes the insertion hole.

  (B) In the method for forming the penetration structure, the penetration structure forming tool described in (a) above is used, and the penetration hole forming member and the connecting member are pushed out from the concrete structure by hitting the tip wall. Structure formation method.

  DESCRIPTION OF SYMBOLS 11 ... Penetration structure formation tool, 21 ... Member for through-hole formation, 31 ... Sealing member, 32 ... Sealing part main body, 32a ... Insertion hole, 33 ... Perimeter wall, 34 ... Flange part, 41 ... Connection member, 43th 2 connection convex part (convex part), 51 ... gap | interval, 61 ... 1st mold, 62 ... 2nd mold, 71 ... foundation (concrete structure), 72 ... through-hole.

Claims (4)

A through hole forming member for forming a through hole in the concrete structure;
A sealing member for sealing a gap between the inner surface of the through hole and the outer surface of the insertion member disposed in the through hole;
A connecting member for connecting the through hole forming member and the sealing member;
A through structure forming tool for forming a through structure in which the sealing member is fixed by removing the through hole forming member and the connecting member after forming the concrete structure,
The sealing member includes a sealing portion main body having an insertion hole through which the insertion member is inserted, a peripheral wall erected on the sealing portion main body, and a flange portion protruding outward from the peripheral wall,
A penetration structure characterized in that concrete is inserted between the inner peripheral surface of the peripheral wall and the outer peripheral surface of the connecting member by attaching the connecting member apart from the peripheral wall inside the peripheral wall. Forming tool. The penetration structure forming tool according to claim 1, wherein the peripheral wall and the flange portion are provided over the entire circumference of the sealing portion main body. The said connecting member is comprised so that the said connecting member and the said sealing member may be connected by having the convex part inserted in the penetration hole which the said sealing member has. The penetration structure forming tool according to claim 1 or 2. It is a formation method of the penetration structure using the penetration structure forming tool according to any one of claims 1 to 3, wherein the through hole forming member is directed to a first mold and the first mold is formed. The penetrating structure forming tool is arranged so that the sealing member faces the second mold frame facing the frame and is sandwiched between the first mold frame and the second mold frame, and the first mold frame and the A method for forming a through structure, wherein the through hole forming member and the connecting member are pushed out of the concrete structure by striking the connecting member after placing concrete between the second formwork.

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