JP2011064277A - Pipe pull-out tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe pull-out tool allowing piping to be pulled out and replaced only on the upper floor, allowing comparatively safe work without using a stepladder, a jack, or the like in work and requiring less working time with high work efficiency. <P>SOLUTION: The pipe pull-out tool includes a divided piece 3 having a tapered outer peripheral surface and recesses and protrusions on the inner peripheral surface and contacting the outer peripheral surface of a pipe A to be pulled out, to hold the pipe A; a holder 1 fitting and holding the piece 3; a plate 2 connected to the holder 1 with a bolt; a cylinder shaft 5 fixed to the plate 2; a cylinder 8 lifting the cylinder shaft 5 upward by oil pressure; and a cylinder holder 4 holding the cylinder 8. The outer peripheral surface of the piece 3 is tapered, and the inner peripheral surface is provided with the recesses and protrusions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an extraction tool for a pipe that is used when replacing an old water pipe (SGP pipe) in an apartment house such as an apartment, an apartment, or a housing complex, and pulls out the water pipe (SGP pipe) from the concrete on the floor.

  In ordinary houses, pipes for water supply (water supply and sewerage) are arranged, and if the service life is extended, troubles such as water leakage will occur. To prevent this, old water supply pipes will be replaced with new pipes. Replace. However, since pipes are often embedded in concrete, it is difficult to extract old pipes. In particular, when removing existing pipes and renewing water supply pipes in the same route as existing pipes in an apartment house, the existing pipes are usually cut up and down, and concrete is drilled with a tire mound cutter, and the pipes penetrate. The existing pipe is taken out as it is. Or when pulling out the pipe buried in concrete straddling the upper floor and the lower floor, a method of pushing up from the lower floor to the upper floor using a jack can be considered. This method has the advantage that the working time is relatively short.

  In addition, when exchanging an old tube and a new tube, a tube drawing device is used. The tube pulling device includes a cylindrical core pit that can be divided into a plurality of parts along the circumferential direction, and a rotary drive mechanism that rotates by being held by a head part that can be divided into a plurality of parts along the circumferential direction similar to the core pit. Slab (concrete) pipe is penetrated by lowering the core pit rotated around the pipe and cutting the slab (concrete). The core pit penetrates the concrete and cuts the core pit and the rotary drive mechanism from the pipe, and then the pipe separated from the slab (concrete) is cut out. After removing the pipe, insert a new pipe into the cut-out hole, Slab space has to fill in the fillers (concrete) through piping replaced method and apparatus has been known (Patent Document 1). However, this method has a problem that it is difficult to work in a narrow place, and the working time becomes considerably long. Moreover, there is a risk of cutting an electric wire embedded in the slab (concrete).

  Further, the drainage pipe joint is configured to be attached through an upper body having an upper receptacle, and a concrete slag that partitions an upper floor and a lower floor of an apartment house, a lower body having a lower connection portion, and an upper body thereof. The lower body is connected to the lower body in a watertight state, and has a longitudinal connection mechanism that is configured to be disengageable. The lower connection portion of the lower body of the drainage pipe joint and the upper end of the drainage stack on the lower floor And a drainage facility having a configuration in which a pipe connection mechanism configured to be separable is provided, and the lower connection portion of the drainage pipe joint and the drainage stack on the lower floor are connected in a watertight state, A method for renewing the drainage facility is known (Patent Document 2). However, this method is a method after removing a concrete slab penetration pipe or at the time of new construction, and is not a method of removing an existing pipe.

JP 2006-200656 A JP2008-180056 JP2007-032759

As mentioned above, when pushing up to the upper floor using a jack from the lower floor, you must go back and forth between the lower floor and the upper floor, and since it becomes a step work and upward work near the ceiling, There is a problem that safety and work efficiency are lowered. There is also a method of generating vibration between concrete and pipes when replacing pipes, but it is annoying to neighboring neighbors such as noise.
Furthermore, the thing of the cited reference 1 also generate | occur | produces a vibration and noise, provides the chip | tip made from a diamond or a super hard steel material in the lower part of a core bit, drives an external gear with a motor, and makes a slab (concrete) cylindrical. It is something to be cut out, and you must go back and forth between the upper and lower floors.

  Although the cost of the cited document 2 is also reduced, it is still necessary to go back and forth between the upper floor and the lower floor in the middle of the piping work, the work is complicated and troublesome, and a stepladder must be used. This is the same as cited document 1. The thing of the cited reference 3 is an invention in the case of exchanging the old buried pipe with the new installed pipe, and shows the configuration in the case of pulling out the buried pipe in the case of replacing the buried pipe buried in the road ground with the new installed pipe. It cannot be applied to apartment buildings.

The present applicants, as a pipe extraction tool when replacing residential pipes,
A three-piece frame having a tapered outer surface in contact with an outer peripheral surface of the pipe to be pulled out; a pipe holder holding the pipe to be pulled out and the three-divided frame; and the pipe A cylinder shaft connected to a holder, a cylinder that lifts the cylinder shaft upward by hydraulic pressure, and a pipe pulling tool including a cylinder holder that holds the cylinder are proposed (Japanese Patent Application No. 2009-048842). ). However, the tube and the tube holder must be almost concentric from the beginning, and if they are offset, the frame may not enter the gap. Also, when pulling up the pipe, if the stroke is full, some of the three pieces will fall when the hydraulic pressure is released and the holder is lowered. I had to. For this reason, there was a problem that workability was poor and work time was required.

  The present invention has been made in order to address the above-described problems, and piping can be pulled out or replaced only on the upper floor, and it is possible to work relatively safely without using a stepladder or a jack during the work. It is another object of the present invention to provide a tube pulling tool that can be operated and that does not require a long working time.

  In other words, in order to solve the above-described problems, the invention according to claim 1 is directed to the tube pulling tool in which the tube A is held in contact with the outer peripheral surface of the tube A to be pulled out and the outer peripheral surface is The top 3 is tapered, the inner peripheral surface is in contact with the pipe to be pulled out, the inner peripheral surface is uneven and divided, the holder 1 for fitting and holding the top 3, and the holder 1 and the bolt are connected by bolts And a cylinder shaft 5 fixed to the plate 2, a cylinder 8 that lifts the cylinder shaft 5 upward by hydraulic pressure, and a cylinder holder 4 that holds the cylinder 8. It is characterized by.

According to a second aspect of the present invention, there is provided a tube in which the tube drawing tool is in contact with the outer peripheral surface of the tube A to be pulled out to hold the tube A, the outer peripheral surface is tapered, and the inner peripheral surface is pulled out. A top 3 which is in contact with A and has an unevenness on the inner peripheral surface and is divided, a holder 1 for fitting and holding the top 3, a plate 2 connected to the holder 1 by bolts, and fixed to the plate 2 A shaft 15 provided with an external thread on the outer peripheral surface;
A fixed base 20 formed by connecting one plate 14 that has penetrated the shaft 15 and the other plate 16 on which the holder 1 containing the piece 3 is placed with a plurality of bolts and nuts;
And a female screw 17 screwed into the male screw of the shaft 15 on the upper side of the one plate 14.

According to a third aspect of the present invention, there is provided a tube in which the tube drawing tool is in contact with the outer peripheral surface of the tube A to be pulled out to hold the tube A, and the outer peripheral surface is tapered, and the inner peripheral surface is pulled out. A top 3 which is in contact with A and has an unevenness on the inner peripheral surface and is divided, a holder 1 for fitting and holding the top 3, a plate 2 connected to the holder 1 by bolts, and fixed to the plate 2 A shaft 15 provided with an external thread on the outer peripheral surface;
A fixed base 20 formed by connecting one plate 14 that has penetrated the shaft 15 and the other plate 16 on which the holder 1 containing the piece 3 is placed with a plurality of bolts and nuts;
A female screw 17 screwed onto the male screw of the shaft 15 on the upper side of the one plate 14 and a handle 21 provided at an end of the shaft 15 provided with a male screw on the outer peripheral surface are provided. .

  Furthermore, the invention described in claim 4 is characterized in that the holder 1 is formed with a tapered hole 1a in which an inner peripheral surface accommodates and holds the top 3.

  The invention according to claim 5 is characterized in that the frame 3 is divided into two parts and these are connected by a link 3l.

  The invention described in claim 6 is characterized in that a chamfer 3d is formed around the inner peripheral lower end of the top 3.

  If the present invention is used as the above means, it is not necessary to go back and forth between the upper and lower floors when performing the piping work and the pipe replacement work, and the pipe drawing work and the replacement work are performed only on one floor. be able to. Moreover, since the work can be performed safely on the floor, the work efficiency can be greatly increased. Moreover, it is safe because it does not get tired during the pulling out of the pipe and does not use a stepladder or the like. Furthermore, vibration and noise are low when using the tube drawing tool of the present invention. In particular, the hydraulic pressure can be manually increased, noise can be further reduced, and there is no inconvenience to the neighbors and the neighborhood. In the present invention, even if a split type piece is used, there is no need to worry about the concentricity between the tube and the holder or the deviation of the piece, so workability and working time are improved in each stage. In addition, since the holder, the plate, and the cylinder holder are assembled by bolts and nuts, they are disassembled and free to carry when the work is completed, and can be used anywhere and are convenient.

It is a whole perspective view which shows the structure of the extraction tool of the pipe | tube of this invention. FIG. 2 (A) is an overall perspective view of a tube pulling tool shown by taking out a tube to be pulled out and a frame housed and held by a holder attached to the lower part from the top of the tube, and FIG. It is a longitudinal section of a holder and a frame accommodated in the holder. FIG. 3A is a vertical cross-sectional view when the pipe drawing tool is attached to the pipe, and FIG. 3B is a vertical cross-sectional view showing a state where the pipe is pulled out to some extent. 4A is a partially enlarged cross-sectional view showing a state in which the frame and the other plate are pulled out, and FIG. 4B shows a load state of the frame fitted into the holder on the surface of the tube when being pulled out. It is sectional drawing. FIG. 5 (A) shows a state in which the tube pulling tool of the present invention is set to the tube to be pulled out, and FIG. 5 (B) is an overall perspective view showing a state in which the tube is pulled out by the tube pulling tool of the present invention. These are the figures corresponding to FIG. 3 (A) and FIG. 3 (B). FIG. 6 (A) is a partial vertical view showing another embodiment in which a tube is pulled out without using a cylinder, and FIG. 6 (B) is still another embodiment in which a tube is pulled out without using a cylinder. It is a partial longitudinal view which shows an example.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an overall perspective view showing the structure of a tube pulling tool according to the present invention. FIG. 2 (A) shows a tube to be pulled out and a frame accommodated and held by a holder attached to the lower portion from the top of the tube. FIG. 2B is a longitudinal sectional view of a holder and a frame housed in the holder. The pipe pulling tool of the present invention comprises a top 3 which is in contact with the outer peripheral surface of the pipe A from which the inner peripheral surface is pulled out to hold the pipe A and whose outer peripheral surface 3b (see FIG. 2B) is tapered. , A holder 1 for accommodating and holding the top 3, a cylinder shaft 5 connected to a plate 2 above the holder 1, a cylinder 8 for lifting the cylinder shaft 5 upward by hydraulic pressure, and the cylinder 8 And a cylinder holder 4 to be placed. The inner peripheral surface 1a of the holder 1 is formed in a tapered shape whose diameter increases upward. The pipe A is cut to a predetermined length up and down on a certain floor (upper floor).

  The holder 1 and the upper plate 2 are configured by assembling three bolts 1c, 1c, 1c and nuts 1d, 1d, 1d. That is, the holder 1 and the upper plate 2 are of an assembly type in which they are screwed into a female screw provided in the holder 1 and the other screw is protruded from a hole provided in the plate 2 and a bolt 1c is tightened with a nut 1d. . The cylinder holder 4 is fitted in one (upper) plate 4a on which the cylinder 8 is installed, the other (lower) plate 4b installed on the floor, and a counterbore provided in the other plate 4b. The three ports 4c, 4c, and 4c to be inserted, and nuts 4d, 4d, and 4d that are screwed onto the end portions of the bolts 4c protruding on the plate 4a. The holder 1 that accommodates and holds the frame 3 is placed on the other (lower) plate 4b. Moreover, it becomes possible to compensate for the shortage of the stroke of the cylinder 8 by substituting the other plate 4b for a frame.

  The cylinder 8 is provided with an injector 6 for injecting oil and applying hydraulic pressure by a hydraulic pump. Although illustrations and details are omitted, a piston that moves upward by hydraulic pressure is disposed in the cylinder 8, and the cylinder shaft 5 is connected to the piston. The cylinder holder 4 holds the holder 1 and the upper plate 2 and the like inside. The hydraulic pressure applied to the cylinder 8 may be a manual type. Further, the number of bolts 1c for connecting the holder 1 and the upper plate 2 is not three, but may be two, four or more, and the number of bolts 4c constituting the cylinder holder 4 is not three. Two, four or more may be used.

  Next, the top 3 is divided into two parts and connected by a link 31 in FIGS. 1 and 2 of the embodiment. Further, an unevenness 3c is formed on the inner peripheral surface of the top 3 so as to bite well into the surface of the tube A to be extracted. Further, the top 3 has a tapered outer peripheral surface 3 b as shown in FIG. 2B so that the tapered inner peripheral surface 1 a of the tube holder 1 is fitted.

The tube drawing tool of the present invention is configured as described above. Next, the operation when the tube A is actually pulled out will be described.
FIG. 3A is a longitudinal sectional view in the case where the tube drawing tool is attached to the tube A, and FIG. 3B is a longitudinal sectional view showing a state in which the tube A is pulled out to some extent.
4A is a partially enlarged cross-sectional view showing a state in which the frame 3 and the other plate 4b are pulled out. FIG. 4B is a diagram illustrating a state where the tube 1 is fitted into the holder 1 on the surface of the tube A when being pulled out. 6 is a cross-sectional view showing a load state of the top 3. FIG. When the pipe pulling tool of the present invention is attached to the pipe A, the hydraulic pressure of the cylinder 8 is pulled out so that the holder 1 is positioned at the lowest position, and the top 3 is accommodated and held in the pipe holder 1. That is, the frame 3 is stored in the holder 1 from the beginning. Then, the pipe pulling tool of the present invention in which the top 3 is housed in the holder 1 is slowly inserted from above the pipe A from the state of FIG. At this time, there is a large chamfer 3d (see FIG. 4B) at the inner lower portion of the top 3, so that the tube A can be easily inserted. Further, the frame 3 is connected by the link 3 l, so that the frame 3 does not jump out of the holder 1 and remains in the holder 1.

  Thereafter, when hydraulic pressure is applied to the cylinder 8, the top 3 lifts up with the holder 1 while biting into the outer periphery of the pipe A. Then, the inner peripheral surface 1a of the holder 1 and the tapered outer peripheral surface (3b) of the frame 3 are in close contact with each other, and the holder 1 tries to move upward together with the frame 3. At this time, as shown in FIG. 4B, since the outer peripheral surface 3b of the top 3 is tapered, when the upward force is applied to the holder 1, the "wedge action" causes the inner peripheral surface of the top 3 A force that pushes the surface of the tube A acts on the surface of the tube A, and the saw-like unevenness 3c formed on the inner peripheral surface of the top 3 tries to bite into the surface of the tube A. For this reason, the inner peripheral surface of the top 3 does not slide on the surface of the tube A. Then, when an upward force is applied to the tube holder 1, the frame 3 moves upward together with the tube holder 1 while biting into the tube A due to “wedge action”, and the tube A finally moves upward. Thus, the old tube A can be pulled out.

  When the stroke is full, the hydraulic pressure of the cylinder 8 is released to lower the whole, and when it is confirmed that the top 3 is in the pipe holder 1, the hydraulic pressure is applied again. Tube A is pulled out by repeating this process. FIG. 5 (A) shows a state in which the tube drawing tool of the present invention is set to the tube A to be pulled out, and FIG. 5 (B) is an overall perspective view showing a state in which the tube A is pulled out by the tube pulling tool of the present invention. Although these are diagrams, these correspond to FIGS. 3A and 3B.

  Like the present invention, the frame 3 divided into two is placed on the holder 1 and the tube A is pulled out. Thus, if it is divided into two, when setting the pipe pulling tool of the present invention to the pipe A, it becomes almost concentric if divided into two, so that the top 3 is a gap because it is offset like the third. Will not enter or part of it will not fall. Therefore, it is not necessary to be conscious of concentricity when working. Further, if the top 3 is divided into three, the stroke is full, and when the pipe holder 1 is lowered by releasing the hydraulic pressure, it is necessary to be conscious of concentricity so that the top 3 does not fall. Even if the height of the holder 1 is increased, it is possible to immediately apply hydraulic pressure just by confirming that the top 3 stays in the pipe holder 1, and there is no loss in workability and work time. However, it is possible to connect the frames 3 by dividing the frames 3 into three by the links 3l.

  In the pipe pulling tool of the present invention, the top 3 is connected (linked) by the link 3l, and the reason is clear by the above-described action. That is, if the frame 3 is divided when the tube A is inserted, it is often difficult to set the tube holder 1 out of the tube holder 1 no matter how chamfered on the lower part of the inner peripheral surface. When the top piece 3 is divided into two parts, it prevents the piece 3 from jumping out of the tube holder 1 or becoming indented, and the top piece 3 does not bite into the surface of the pipe A. Further, it is easy to carry and some parts are eliminated. It becomes difficult to do.

  In the above embodiment, the cylinder 8 and the cylinder shaft 5 act to move the pipe holder 1 and the top 3 upward. However, as shown in FIG. Instead of using one of the plates 4a of the cylinder holder 4, a normal plate 14 is used, and instead of the cylinder shaft 5, a male shaft (a base screw is good) is engraved, and the shaft 15 is One of the plates 14 pierced, a holder 1 having a tapered hole enough to fit the pipe A to be pulled out and the top 3 and the holder 1 are connected with bolts and nuts, and the shaft 15 is fixed. The plate 2 may be used. That is, the top 3 that holds the tube A in contact with the outer peripheral surface of the pipe A to be pulled out and has a tapered outer peripheral surface, the holder 1 that holds the top 3, and the shaft 15 that is provided with a male screw on the outer peripheral surface. And the other plate 16 on which the holder 1 is placed, and the one plate 14 and the other plate 16 are connected by a plurality of bolts 4c and nuts 4d. It is good also as a tube drawing tool provided with the fixed base 20 and the internal thread 17 screwed together with the external thread of the shaft 15 on the upper side of the one plate 14.

  Alternatively, as shown in FIG. 6 (B), the top 3 is held in contact with the outer peripheral surface of the pipe A to be pulled out and holds the pipe A, and the outer peripheral surface is tapered, and the pipe A and the top 3 are held. Holder 1, a shaft 15 provided with an external thread on the outer peripheral surface, one plate 14 penetrating the shaft 15, the other plate 16 on which the holder 1 housing the piece 3 is placed, and one of these plates 14 and the other plate 16 connected by a plurality of bolts 4c and nuts 4d, a female screw 17 screwed onto the male screw of the shaft 15 on the upper side of the one plate 14, and the outer periphery It is good also as a tube extraction tool provided with the handle | steering-wheel 21 provided in the edge part of the shaft 15 which provided the external thread in the surface. Thus, the tube holder 1 in which the top 3 is fitted may be moved upward by turning the handle 21. Of course, the pipe holder 1 in which the plate 2 to which the shaft 15 is fixed and the frame 3 are fitted is installed on the upper side of the other plate 16. In this case, the handle 21 is rotated while holding the female screw nut 17. Alternatively, the shaft 15 provided with the male screw may be a ball screw, and the ball screw may be driven by a motor. Alternatively, a female screw may be provided on the plate 14 instead of the female screw nut 17.

1 Pipe holder 1a Pipe holder inner peripheral surface (tapered)
1c bolt 1d nut 2 plate 3 frame 3b frame outer peripheral surface (tapered)
3c Serrated irregularities 3l Link 4 Cylinder holder 4a One plate
4b The other plate 4c Bolt 4d Nut 5 Cylinder shaft 6 Injector 8 Cylinder 14 One plate 15 Shaft 16 The other plate 17 Female thread nut 20 Fixing base 21 Handle

Claims (6)

  A top 3 which is in contact with the outer peripheral surface of the pipe to be pulled out and holds the pipe and the outer peripheral surface is tapered; the inner peripheral surface is in contact with the pipe to be pulled out; A holder for fitting and holding the frame, a plate connected to the holder by bolts, a cylinder shaft fixed to the plate, a cylinder for lifting the cylinder shaft upward by hydraulic pressure, and the cylinder And a cylinder drawing tool. A piece that is in contact with the outer peripheral surface of the pipe to be pulled out and holds the pipe and has an outer peripheral surface that is tapered, the inner peripheral surface is in contact with the pipe to be pulled out, and the inner peripheral surface is provided with irregularities and divided; A holder for inserting and holding a frame; a plate connected to the holder by a bolt; a shaft fixed to the plate and provided with an external thread on the outer peripheral surface;
A fixing base formed by connecting one plate that has penetrated the shaft and the other plate on which the holder containing the piece is placed with a plurality of bolts and nuts;
A tube drawing tool comprising: a female screw threadedly engaged with the male screw of the shaft on the upper side of the one plate. A piece that is in contact with the outer peripheral surface of the pipe to be pulled out and holds the pipe and has an outer peripheral surface that is tapered, the inner peripheral surface is in contact with the pipe to be pulled out, and the inner peripheral surface is provided with irregularities and divided; A holder for inserting and holding a frame; a plate connected to the holder by a bolt; a shaft fixed to the plate and provided with an external thread on the outer peripheral surface;
A fixing base formed by connecting one plate that has penetrated the shaft and the other plate on which the holder containing the piece is placed with a plurality of bolts and nuts;
A tube drawing tool comprising: a female screw screwed onto the male screw of the shaft on the upper side of the one plate; and a handle provided at an end of the shaft provided with a male screw on the outer peripheral surface.   4. The tube drawing tool according to claim 1, wherein an inner peripheral surface of the holder is formed with a tapered hole that accommodates and holds the frame. 5.   The pipe pulling tool according to any one of claims 1 or 2, wherein the frame is divided into two parts and connected by a link.   6. The tube drawing tool according to claim 1, wherein a chamfer is formed around an inner periphery lower end of the frame.

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