JP2012040639A - Piping cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping cutting device used when exchanging various kinds of piping.SOLUTION: The piping cutting device for cutting the only piping 11 to be removed which is connected to an existing socket 10 includes: a base body 1 having a piping receiver seat 7 for supporting the piping 11 to be removed by inserting the piping 11 to be removed inside thereof; a cutting chisel 2 mounted on the base body 1 freely to move upward and downward; and a guide rail 3 for guiding the cutting chisel 2 to move upward and downward. The piping 11 to be removed is supported to the inside of the piping receiver seat 7 of the base body 1, and in a state of pinching the piping 11 to be removed between the guide rail 3 and the piping receiver seat 7, a corresponding part of the piping to be removed is cut by the cutting chisel 2 while pushing the corresponding part of the pipe to be removed. The piping 11 to be removed can be thereby easily removed from the socket 10.

Description

  The present invention relates to a pipe cutting device used when, for example, various pipes such as a water supply pipe, a drain pipe, a steam pipe, and a hot water pipe are replaced.

  When removing and replacing the old piping at the work site such as a renovation building, the existing socket part is left and only the old removed piping is replaced with new piping. Since the removal pipe and the socket part are firmly connected to each other by internal rust, other deposits, or corrosion, it is difficult to easily remove the removal pipe from the socket part.

  Therefore, normally, heat such as a torch or burner is applied to the connection between the removal pipe and the socket part to decompose rust and deposits, or forcibly rotate while using a dedicated tightening tool, Or, while using this special tightening tool, it was removed by applying vibration while hitting it with a hammer.

However, when using a torch or burner, there is a risk of causing a fire at the repair work site. When using a dedicated tightening tool, considerable force work is required. When used with a hammer, other existing pipes that do not need to be removed were often damaged and leaked.
In particular, in renovation work where there is a lot of work in narrow places, work near places such as walls and floors is forced, workability is bad, existing pipes are damaged, and it is necessary to dismantle even parts that do not need to be removed is there.

  The present invention has been developed in view of such a conventional situation, and the invention according to claim 1 is a pipe cutting device that cuts only a removed pipe connected to an existing socket portion, and is removed inside. A base having a pipe receiving seat for inserting and supporting the pipe, a cutting chisel attached to the base so as to be movable up and down, and a guide rail for guiding the raising and lowering of the cutting chisel. The removal pipe is supported inside the seat, the state where the removal pipe is held between the guide rail and the pipe receiving seat, and the corresponding part of the removal pipe is cut while being pushed by the cutting chisel. .

  According to a second aspect of the present invention, on the premise of the first aspect, the pipe receiving seat of the base body has a V-shape capable of supporting two points of the removed pipe on the lower side thereof.

  According to a third aspect of the present invention, on the premise of the first or second aspect, the tip edge of the cutting chisel has a tapered shape in which the socket portion side first bites into the removal pipe.

  Therefore, in the invention described in claim 1, the removed pipe is inserted inside the pipe receiving seat of the base body without using a torch, a burner, a dedicated tightening tool or a hammer as in the prior art. After the base is assembled into the connection between the removal pipe and the socket part, the removal pipe supported by the pipe receiving seat is cut between the guide rail and the pipe receiving seat and cut with a cutting chisel to connect the removal pipe. Since the corresponding part on the part side is cut, it is possible to easily remove the removal pipe from the existing socket part.

  In the invention according to claim 2, since the lower side of the pipe seat has a V-shape, the removal pipe can be supported at two points by this V-shape. It becomes reliable and the corresponding part of the removal pipe can be easily cut with a cutting chisel.

  In the invention according to claim 3, in the presence of the taper shape, the tip edge of the cutting chisel cuts into the socket part side of the removal pipe first, so that the part firmly connected to the socket part is separated first. Since it can do, after that, it becomes possible to cut | disconnect the corresponding | compatible site | part of the connection part of removal piping easily.

It is a front view which shows the piping cutting device which concerns on the Example of this invention. FIG. It is a principal part front view which shows the state which incorporated the piping cutting device in the connection part side of removal piping. It is the principal part side sectional drawing. It is a principal part front view which shows the state cut | disconnected while pushing in the upper surface side of removal piping. It is the principal part side sectional drawing. It is a principal part front view which shows the state cut | disconnected while pushing in the lower surface side of removal piping. It is the principal part side sectional drawing. It is a principal part front view which isolate | separates the perimeter of removal piping from a socket part, and shows a state. It is the principal part side sectional drawing.

  The present invention presupposes a pipe cutting device that cuts only a removed pipe connected to an existing socket portion, and a base having a pipe receiving seat for inserting and supporting the removed pipe on the inside, and the base can be moved up and down And a guide rail for guiding the raising and lowering movement of the cutting chisel. The removal pipe is supported inside the pipe receiving seat of the base, and the removal pipe is connected to the guide rail and the pipe receiver. By obtaining a holding state between the seats and cutting the corresponding part of the removal pipe while pushing it with the above-mentioned cutting chisel, the old pipe that needs to be replaced is easily removed from the socket part.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to a preferred embodiment. A pipe cutting device according to the embodiment includes, for example, various pipes (single pipe) such as a water supply pipe, a drain pipe, a steam pipe, and a hot water pipe. When replacing these old pipes with new pipes, it is possible to separate and remove the connection part of the pipe that is firmly connected to the existing socket part from the socket part. It is what.

  Specifically, as shown in FIGS. 1 and 2, the pipe cutting device mainly includes a base body 1 incorporated in a connection portion between an existing socket portion 10 and a removal pipe 11, and a vertical movement of the base body 1. A cutting chisel 2 that can be attached and a pair of guide rails 3 that guide the up-and-down movement of the chisel 2 for cutting are provided.

  As shown in the figure, the first base 1 includes a bolt guide 4 for screwing the push bolt 5 so as to be able to advance and retreat, a pair of side walls 6 hanging from both ends of the bolt guide 4, and the pair of side walls. A pushing bolt 5 that has a pipe receiving seat 7 that continuously extends from the wall 6 and is connected in a V shape on the lower side, and that is screwed into the bolt guide 4 is connected to the cutting chisel 2 via a bolt adapter 8. The pair of side walls 6 are connected to the rear end portion, and the pair of guide rails 3 are mounted so as to be movable up and down, and the pipe receiving seat 7 is inserted and supported by the removal pipe 11 inside. It has a configuration that can support two points of the removal pipe 11 in a V shape.

  The second cutting chisel 2 is connected to the push-in bolt 5 and moves up and down between the pair of guide rails 3, and its tip has a sharp shape so that it can be cut while pushing the removal pipe 11. And the front-end | tip edge is exhibiting the taper shape 2a of the downward inclination which the said socket part 10 side bites into first.

  The third guide rail 3 guides the cutting chisel 2 so as to be movable up and down. Each guide rail 3 is slidably supported on the corresponding side wall 6 of the base 1 and is fixed by a fixing screw 9. The vertical position can be freely adjusted.

  Therefore, when cutting and removing the old removed pipe 11 using such a pipe cutting device, first, the pair of guide rails 3 are connected via the fixing screws 9 according to the diameter of the removed pipe 11. At the same time as moving upward in advance, the cutting chisel 2 is also set in a state of being moved upward via the push-in bolt 5, while the removal pipe 11 connected to the existing socket part 10 is cut to a predetermined length Then, while the cut end is inserted into and supported by the inside of the pipe receiving seat 7, the entire apparatus is assembled into the connection portion between the socket portion 10 and the removal pipe 11, and then the pair of guide rails 3 and the cutting chisel 2. If the removal pipe 11 is held between the pipe receiving seat 7, the cutting chisel 2 and the guide rail 3, the removal pipe 11 connected to the socket portion 10 as shown in FIGS. Correspondence of connection part Position is to be supported two points by utilizing the V-shape seat 7 pipe.

  Therefore, this time, when the push bolt 5 is rotated in a predetermined direction using a tool such as a ratchet, the cutting chisel 2 is lowered as shown in FIGS. 5 and 6, and the corresponding portion of the removal pipe 11 is pushed in. However, since it will cut | disconnect so that it may wind inside, the removal piping 11 is prevented from expanding unnecessarily.

  In this case, since the lower surface side of the removal pipe 11 is supported at two points on the pipe receiving seat 7 and its rotation is prevented, it goes without saying that it can be easily cut with the cutting chisel 2. Since the tip edge of the chisel 2 has the taper shape 2a having the downward slope described above, the removal pipe that the tip of the chisel 2 for cutting cuts strongly into the corresponding portion on the socket portion 10 side and is connected to the socket portion 10 11 connection parts are immediately disconnected from the socket part 10.

  Next, when the entire apparatus is set upside down with respect to the removal pipe 11 while raising the lowered cutting chisel 2 this time, as shown in FIGS. 7 and 8, the lower surface side of the removal pipe 11 is cut. The chisel 2 will face each other.

  After obtaining this state, when the pushing bolt 5 is rotated again in a predetermined direction using a tool such as a ratchet, the cutting chisel 2 descends as shown in FIGS. 9 and 10, and the removal pipe 11 is removed. In this case, the tip edge of the cutting chisel 2 has a downwardly inclined taper shape 2a, and the tip of the chisel 2 for cutting bites into the socket portion 10 side. Accordingly, the connecting portion of the removal pipe 11 connected to the socket portion 10 is separated from the socket portion 10.

  Accordingly, since the connection portion of the removal pipe 11 is completely separated from the socket portion 10 over the entire circumference, it is easy to remove the pipe 11 and connect a new pipe to the existing socket portion 10. It is possible to replace the pipe.

  Since the pipe cutting device according to the present invention can disconnect the pipe connecting part connected to the existing socket part, the pipe such as a water supply pipe, a drain pipe, a steam pipe, and a hot water pipe can be used. If used for replacement, it is very convenient.

DESCRIPTION OF SYMBOLS 1 Base body 2 Cutting chisel 2a Taper shape 3 Guide rail 4 Bolt guide 5 Push bolt 6 Side wall 7 Piping seat 8 Adapter 9 Fixing screw 10 Socket part 11 Removal piping

Claims (3)

  A pipe cutting device that cuts only the removed pipe connected to the existing socket part, and has a base having a pipe receiving seat for inserting and supporting the removed pipe inside, and a cutting attached to the base so as to be movable up and down And a guide rail for guiding the lifting movement of the cutting chisel, supporting the removal pipe inside the pipe receiving seat of the base, and holding the removal pipe between the guide rail and the pipe receiving seat. A pipe cutting device characterized in that it obtains a state and cuts the corresponding part of the removed pipe with the cutting chisel.   2. The pipe cutting device according to claim 1, wherein the pipe receiving seat of the base body has a V shape in which a lower side thereof can support the removed pipe at two points.   The pipe cutting device according to any one of claims 1 to 2, wherein a tip edge of the cutting chisel has a tapered shape in which the socket portion side first bites into the removed pipe.

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