JP3161557U - Through-hole forming tube - Google Patents

Abstract

Provided is a through-hole-forming tube body that can be easily removed from the foundation concrete, can be diverted from an existing product, and can be used repeatedly. A cylindrical tube made of synthetic resin having elasticity has an elasticity on an inner peripheral surface of one first cut side of a first notched cylindrical tube provided with a first cut portion cut in an axial direction. An outer peripheral surface on one second cut side of the second cutout cylindrical tube 3 provided with a second cut portion cut in the axial direction of the cylindrical tube made of synthetic resin is arranged, and the other cutout of the first cutout cylindrical tube 2 is arranged. An inner peripheral surface of the other second cut side 9 of the second notched cylindrical tube 3 is arranged on the outer peripheral surface of the first cut side 6 to form a cylindrical tube, and the inner periphery of both end openings of the cylindrical tube body A diameter of the inner peripheral surface is expanded on the surface, and a pair of synthetic resin ring-shaped holding short tubes 10 are detachably fitted. [Selection] Figure 1

Description

  The present invention relates to a reusable through-hole-forming tube body that forms a hole penetrating a water supply / drain pipe or other pipe in a concrete structure.

  2. Description of the Related Art Conventionally, a through-hole forming tool for forming a through-hole used for a concrete structure on a building or civil engineering site has a predetermined length of a cylindrical body called a long rigid paper void tube (conventional 1). When the void tube was removed from the concrete, it was deformed and crushed and removed.

  In recent years, a reusable sleeve (cylindrical body forming a through hole) has a predetermined diameter of a pipe hole and is formed by providing an incision in the axial direction of a cylindrical tube having elasticity. A first adjusting pipe formed by providing a cut in the axial direction of a cylindrical tube having an outer diameter larger than the inner diameter of the sleeve main body and having elasticity, and the positions of both cuts coincide with each other. In addition, a cylindrical tube having an outer diameter larger than the inner diameter of the first adjustment pipe and having elasticity is cut inside the first adjustment pipe. There has been proposed a sleeve characterized by detachably fitting a second adjusting pipe formed to be detachable so that the positions of the cuts do not coincide with each other. (Patent Document 1)

JP-A-2005-200963

  When removing the above-mentioned void pipe (conventional 1) from the concrete, insert a sharp screwdriver or burl into the boundary between the outer circumference of the void pipe and the concrete and hit the inside with a hammer etc. The tube was deformed, crushed and extracted. For this reason, it takes time to extract the void tube, and it cannot be used repeatedly, resulting in waste, resulting in economic and environmental problems.

  In addition, when removing the first adjusting pipe and the second adjusting pipe from the concrete, the sleeve of Patent Document 1 is sharp because the outer peripheral surface of the sleeve body and the concrete adhere to each other and the sleeve body cannot be reduced in diameter. It was necessary to insert a screwdriver or the like into the boundary between the outer peripheral surface of the sleeve body and the concrete and press it inside with a hammer.

  In addition, when the sleeve of Patent Document 1 is poured into the concrete, when the sleeve sinks due to vibration or load and part of the sleeve is buried in the base base, the part of the base base is damaged and removed. It was hanging.

  In order to solve the above problem, the device according to claim 1 is the first cut of one of the first notched cylindrical tubes provided with a first cut portion cut in the axial direction of a cylindrical tube made of synthetic resin having elasticity. The outer peripheral surface of one second cut side of the second cutout cylindrical tube provided with a second cutting portion cut in the axial direction of the cylindrical tube made of synthetic resin having elasticity on the inner peripheral surface on the side, An inner peripheral surface on the other second cutting side of the second notched cylindrical tube is arranged on the outer peripheral surface on the other first cutting side of the first notched cylindrical tube, and is formed into a cylindrical tube. The inner peripheral surface is enlarged in diameter to the inner peripheral surface of both end openings, and a pair of synthetic resin ring-shaped holding short tubes are detachably fitted.

  A device according to claim 2 is the device according to claim 1, wherein the synthetic resin ring-shaped holding short tube is formed in a circular lid provided with a removal hole.

  A device according to claim 3 is the device according to claim 1, wherein the synthetic resin ring-shaped holding short tube is formed of a circular lid provided with a removal hole, and the circle of the circular lid is formed. It is that it was made the notch cover body which provided the linear part in the periphery.

  According to the first aspect of the present invention, when removing the through hole forming tube from the concrete, the holding short tube is simply pulled out, and the first notched cylindrical tube and the second notched cylindrical tube themselves are not contacted with the concrete. It can be removed easily because it is reduced in diameter by the elastic force and easily peeled off from the concrete surface.

  According to the first aspect of the present invention, it can be easily formed from a tube made of synthetic resin. Moreover, since it can be used repeatedly, it can be expected to reduce carbon dioxide.

  According to the first aspect of the present invention, when a short tube made of a ready-made synthetic resin is used, there is no need for equipment and cost for newly manufacturing a through-hole forming tube. Further, the material cost and the disposal cost of the waste pipe are not required, and the cost and carbon dioxide can be reduced.

  According to the second aspect of the present invention, since the lid is fitted to both ends of the through-hole forming tube body, it is possible to prevent the concrete from entering the inside of the through-hole forming tube body.

  According to the third aspect of the present invention, even if the through-hole forming tube member sinks, it is easy because the straight portion is not buried in the foundation base because of the circular notched lid provided with the straight portion on the circumference. Can be extracted.

It is a perspective view which shows 1st Embodiment of the through-hole formation tube body which concerns on this invention. It is the front view and back view which show 1st Embodiment of the said through-hole formation tubular body. It is a disassembled perspective view which shows 1st Embodiment of the said through-hole formation tubular body. It is a perspective view shown when the said through-hole formation tubular body is fixed to a reinforcing bar. It is a perspective view which shows the removal procedure of the said through-hole formation tubular body from the foundation concrete. It is a perspective view which shows 2nd Embodiment of the through-hole formation tubular body which concerns on this invention. It is a perspective view which shows 3rd Embodiment of the through-hole formation tubular body which concerns on this invention.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the through-hole forming tube body 1 according to the first embodiment includes a first cutout cylindrical tube provided with a first cut portion 4 cut in the axial direction of a cylindrical tube made of synthetic resin having elasticity. One of the second notched cylindrical tubes 3 is provided with a second cut portion 7 cut in the axial direction of a cylindrical tube made of synthetic resin having elasticity on the inner peripheral surface of one of the first cut sides 5 of the two. The outer peripheral surface of the cutting side 8 is arranged, and the inner peripheral surface of the other second cutting side 9 of the second notched cylindrical tube 3 is arranged on the outer peripheral surface of the other first cutting side 6 of the first notched cylindrical tube 2. The cylindrical tubular body is arranged to form a cylindrical tubular body, and the inner circumferential surface is enlarged in diameter to the inner circumferential surface of both end openings of the cylindrical tubular body, and a pair of synthetic resin ring-shaped holding short tubes 10 are detachably fitted. Configured.

The first cutout cylindrical tube 2 and the second cutout cylindrical tube 3 of the through-hole-forming tube body 1 are made of two cylindrical tubes having substantially the same outer diameter and axial length, and are cut in the respective axial directions. Formed. Although the width | variety cut | disconnected in the axial direction is not limited, it cut | disconnects suitably in the range which can form the 1st notch cylindrical tube 2 and the 2nd notch cylindrical tube 3 in a cylindrical tube body. Subsequently, although the width of the holding short tube 10 is not limited, the cylindrical tube having substantially the same outer diameter is appropriately cut within a range of 5 mm to 20 mm in width.

The first cutout cylindrical tube 2 and the first cutout cylindrical tube 3 and the holding short tube 10 of the through hole forming tube body 1 of the present invention are excellent in strength and water resistance, and are made of synthetic resin hard vinyl chloride having elasticity. Made for ready-made drainage pipes is optimal and available at low cost. In addition, material costs are eliminated when extra waste pipes are used in the construction work.

Next, the attachment procedure of the through hole forming tube 1 of the present invention will be described.
As shown in FIG. 4, the through-hole forming tube 1 is arranged in a reinforcing bar 11 arranged in a lattice pattern, and is fastened to the upper, lower, left, and right reinforcing bars by a wire 13, and the through-hole forming tube 1 A formwork (not shown) is placed so as to face both ends, and concrete is cast to form the foundation concrete 13.

Next, a procedure for removing the through-hole forming tubular body 1 of the present invention from the basic concrete 13 will be described.
FIG. 5 is a perspective view showing a procedure for removing the formwork (not shown) after the concrete is solidified and removing the through-hole forming tube 1 from the foundation concrete 13. As shown in FIG. 5, when the holding short tube 10 of the through-hole forming tube 1 embedded in the foundation concrete 13 is knocked out with a stick-like piece of wood or the like, the other of the first notched cylindrical tube 2 not in contact with the concrete surface Since the diameter of the first cut side 6 and the second cut side 8 of the second cutout cylindrical tube 3 is reduced by the elastic force of confidence from the first cut side 6 and easily peeled off from the concrete surface, the first cutout cylindrical tube 2 and the second cutout cylindrical tube 2 can be easily removed. The through-hole 14 can be formed by extracting the 2-cut cylindrical tube 3.

  As shown in FIG. 6, the through hole forming tube body 1 according to the second embodiment forms a first notched cylindrical tube 2 and a second notched cylindrical tube 3 in a cylindrical tube as in the first embodiment, The inner peripheral surface of both end openings is enlarged in diameter, and a circular lid body 16 having a removal hole 19 provided at the center position is detachably fitted.

Next, the removal procedure is as follows. When a rod-like wood or tool is inserted into the removal hole 19 and the opposite cover body 16 is pressed from the inside or the cover body 16 that has been struck out is removed, the first embodiment will be described below. It is the same as the form.

  As shown in FIG. 7, the through-hole forming tube body 1 according to the third embodiment forms a first notched cylindrical tube 2 and a second notched cylindrical tube 3 in a cylindrical tube as in the first embodiment, The inner peripheral surface of the opening at both ends is enlarged in diameter and formed with a circular lid provided with a removal hole 19, and a notched lid 17 provided with a linear portion 18 on the circumference of the circular lid is replaced with the linear portion 18. Is detachably fitted so as to be positioned on the lower side, and the removal procedure is the same as in the second embodiment.

DESCRIPTION OF SYMBOLS 1 Through-hole formation tubular body 2 1st notch cylindrical tube 3 2nd notch cylindrical tube 4 1st cutting part 5 One 1st cutting side 6 of a 1st notch cylindrical tube The other 1st cutting side 7 of a 1st notch cylindrical tube 2nd cutting part 8 One 2nd cutting side 9 of the 2nd notch cylindrical pipe The other 2nd cutting side 10 of the 2nd notch cylindrical pipe Holding short tube 11 Reinforcing bar 12 Wire 13 Foundation concrete 14 Through-hole 15 Foundation base 16 Lid 17 Notch lid 18 Straight line portion 19 Removal hole

Claims (3)

  A cylinder made of synthetic resin having elasticity on the inner peripheral surface of one first cut side of the first notched cylindrical pipe provided with a first cutting portion cut in the axial direction of the cylindrical pipe made of synthetic resin having elasticity An outer peripheral surface on one second cutting side of a second notched cylindrical tube provided with a second cutting portion cut in the axial direction of the tube is disposed, and an outer peripheral surface on the other first cutting side of the first notched cylindrical tube is arranged The second cut-out cylindrical tube has an inner peripheral surface on the other second cut side and is formed into a cylindrical tube, and the inner peripheral surface is enlarged in diameter to the inner peripheral surface of both end openings of the cylindrical tube. A through-hole-forming tube body, wherein a ring-shaped holding short tube made of synthetic resin is detachably fitted.   The through-hole forming tube body according to claim 1, wherein the synthetic resin ring-shaped holding short tube is formed of a circular lid body provided with a removal hole.   The ring-shaped holding short tube made of synthetic resin is formed of a circular lid provided with a removal hole, and is a notched lid provided with a linear portion on the circumference of the circular lid. The through-hole forming tube body according to claim 1.

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