JP4152844B2 - Pipe cutter - Google Patents

Description

  The present invention relates to a pipe cutter for cutting a pipe with high accuracy.

  Conventionally, pipe cutting jigs such as so-called flexible cutters and vinyl chloride cutters have been used to cut piping such as water supply and drainage pipes. All of these cutting jigs are configured to include a pipe receiving part and a blade part for cutting the pipe, and no mechanism for fixing the pipe to the receiving part is provided.

  Therefore, when cutting the pipe, the position of the pipe placed on the receiving part may be shifted or inclined, and the cut surface of the pipe may also be shifted from the predetermined position and become slanted. There was a risk of causing the cause.

  To deal with this problem, for example, in Patent Document 1, an upper handle provided with a pipe receiving portion and a lower handle provided with a pipe cutting blade are pivotally attached in a scissor shape, and are associated with the tip of the receiving portion. A pipe cutter having a configuration in which a pipe restraining member that can be detached and hold a pipe is provided in a lower handle is described. At the time of cutting the pipe, the pipe restraining member is locked to the tip of the receiving part, and the pipe is held by the pipe restraining member and the receiving part.

Patent Document 2 proposes a pipe cutter in which a pipe holder is provided on a side surface of a receiving portion that holds a pipe. The pipe holder is formed of a bent piece formed in a “<” shape and is configured to be able to contact and hold the lower outer peripheral surface of the pipe.
Japanese Utility Model Publication No. 57-103065 JP-A-9-215875

  In the pipe cutter described in Patent Document 1, since the pipe restraining member that holds the pipe must be manually engaged with the tip of the receiving portion, it takes time to attach and detach the pipe, and the workability is poor. In addition, in this pipe cutter, since the pipe diameter of the pipe that can be held between the pipe restraining member and the receiving portion is limited, the versatility is poor.

  Moreover, in the pipe cutter of the said patent document 2, since only a pipe is hold | maintained from the downward direction of a pipe with a pipe holder, it is thought that a pipe cannot fully be fixed.

  In particular, most of the pipes to be cut by these pipe cutters are cross-linked polyethylene pipes or polybuden pipes, and are stored in a tightly wound state. Therefore, there is a case where the pipe is entangled at the time of cutting, and the bent pipe must be cut. Therefore, in the conventional pipe cutter, the blade is inserted into the pipe perpendicular to the tube axis, and the pipe is It is still difficult to cut at a right angle.

  In view of the circumstances as described above, the present invention makes it easy to hold and fix a pipe when cutting the pipe, regardless of whether the pipe is wound or not, and can be cut accurately perpendicular to the tube axis. It aims at providing the pipe cutter excellent in all of versatility.

In order to solve the above problems, a pipe cutter according to the present invention, a pair of lever handle is connected openably pivoted by the pivot shaft, together with the receiving portion of the pipe is provided on the distal end side of one lever handle On the tip end side of the other lever handle, a cutting blade capable of cutting the pipe and a pressing member capable of fixing the pipe between the receiving portion are provided. And the holding member is pivotally attached to the lever handle via a torsion spring, and is biased in the direction close to the receiving portion, and when cutting the pipe, by holding the pair of lever handles, The pressing member is close to the pipe, and the pipe placed on the receiving part is naturally clamped and fixed between the receiving part, and when further gripped, the cutting blade enters the pipe held between the pressing member and the receiving part. It is characterized in that the pipe can be cut while being stabilized with a pressing member so as not to be displaced .

  As a result, when the pipe is cut, the presser member approaches the receiving portion in conjunction with the cutting blade in accordance with the operation of bringing both lever handles close to each other. That is, the holding member close to the receiving portion together with the cutting blade can naturally clamp the pipe placed on the receiving portion and fix it to the receiving portion, and can cut without causing any deviation or inclination.

  More specifically, in the pipe cutter according to the present invention, the spring is constituted by a torsion spring, and the cutting blade can further enter from a position where the pipe is sandwiched between the pressing member and the receiving portion.

  As a result, as the cutting blade cuts the pipe, the presser member fixes the pipe more firmly with the receiving portion, and even when a cutting load is applied, the holding member can be stably cut while holding the pipe. it can.

Also, in the pipe cutter according to the present invention, the pressing member that are provided on one or both sides of the cutting blade. As a result, even if the pipe to be cut is wound, it can be cut while being pressed and corrected by the pressing member.

Further, in the pipe cutter according to the present invention , a spring on a shaft hole of a rotating shaft to which the lever handle and the presser member are coupled is provided above the side surface on the distal end side of the other lever handle to which the presser member is pivotally attached. The connection hole for the eccentric is provided eccentrically, one end of the torsion spring is connected to the connection hole for the spring, and the connection recess having the shaft hole of the rotation shaft and the connection hole is formed on the proximal end side of the pressing member. The other end of the torsion spring is connected to the connection hole of the pressing member via a disk-shaped spacer in the connection recess, and the pressing member and the other lever handle are pivotally attached. . As a result, when the pair of lever handles are held close to each other, the presser member is urged in the direction of approaching the receiving portion by the action of the torsion spring to naturally hold the pipe, and the cutting blade has an upper outer periphery of the pipe. Since the pipe is cut by entering the surface, the pipe is not displaced by this cutting operation, and the pipe can be cut stably. It is also possible to fix various pipes having different diameters to the receiving part.

  In the pipe cutter according to the present invention, the pipe is fixed between the receiving portion of the pipe and the holding member, and the holding member is connected to the lever handle via a spring material such as a torsion spring. The pipe can be cut while being urged in the direction of approaching the portion and sandwiching the pipe. Accordingly, the holding member can be brought close to the pipe in accordance with the cutting operation of the pipe, and the pipe can be clamped between the receiving portion, so that the pipe holding and fixing work is extremely easy, and becomes stronger as the cutting progresses. By fixing the pipe, workability can be greatly improved.

  In addition, since the presser member is provided on one or both sides of the cutting blade, even if the pipe to be cut is wound, the pipe is stably held while correcting the winding and orthogonal to the tube axis. And can be cut with high accuracy.

  Furthermore, since the receiving portion is recessed in a substantially V shape, it can be used for various pipes with different diameters and can be versatile.

  Hereinafter, embodiments of a pipe cutter according to the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of a pipe cutter according to the present invention, FIG. 1 is a side view of the pipe cutter, FIG. 2 is a perspective view of the pipe cutter, and FIG. 3 is an exploded perspective view of the pipe cutter. .

  A pipe 2 cut by the pipe cutter 1 is indicated by a broken line in the figure, and is formed in a cylindrical shape by a synthetic resin material such as cross-linked polyethylene or polybutene. The pipe cutter 1 includes a pair of lever handles 12 and 14.

  The lever handle 12 is formed in a cross-sectional groove shape in which a grip portion 121 on the base end side is opened downward, and the other lever handle 14 can be stored inside the grip portion 121.

  The lever handle 12 is integrally provided with a receiving portion 13 so as to hold the pipe 2 to be cut. The receiving portion 13 is formed with a wide front end side of the lever handle 12 and is recessed in a substantially V shape in a side view. The receiving portion 13 includes a slit 13 a in the axial direction of the lever handle 12, and the cutting blade 15 provided on the other lever handle 14 can be inserted to the bottom of the receiving portion 13.

  The lever handle 12 is provided with a connecting hole 122 for connecting the lever handles 12 and 14 between the receiving portion 13 and the gripping portion 121 so as to penetrate in the vertical direction.

  The other lever handle 14 is provided with a cutting blade 15 for cutting the pipe 2 held by the receiving portion 13. The cutting blade 15 is attached to a connecting portion 142 on the distal end side of the lever handle 14. On both sides of the cutting blade 15, a pressing member 16 having a side surface slightly smaller than the cutting blade 15 is provided.

  Each pressing member 16 has a flat shape at the base end side, has a connection hole 161 inside the connection recess 162, and is formed so as to be pivotally attached to the coupling portion 142 of the lever handle 14. The front end side of the pressing member 16 is formed with a round bottom so as to follow the outer peripheral surface of the pipe 2, and the pipe 2 can be sandwiched between the receiving portion 13.

  In the illustrated embodiment, the spring connection hole 143 is provided eccentrically above the side surface of the coupling portion 142 of the lever handle 14. A torsion spring 17 and a spacer 18 are interposed between the pressing member 16 and the connecting portion 142. The torsion spring 17 is configured such that the spring is wound in a cylindrical shape, and both ends thereof are extended in opposite directions along the rotation shaft 11 to receive a load.

  One end of the torsion spring 17 is connected to the spring connection hole 143, and the other end of the torsion spring 17 is connected to the connection hole 161 of the pressing member 16 through the disk-shaped spacer 18 in the connection recess 162. Thereby, each pressing member 16 and the lever handle 14 are pivotally attached. The spacer 18 may be integrally formed in the connection recess 162 of the pressing member 16.

  The lever handle 14 configured as described above is inserted into the connecting hole 122 of the lever handle 12 and causes the cutting blade 15 to protrude above the connecting hole 122. The connecting hole 122 of the lever handle 12, each pressing member 16, and the connecting part 142 of the lever handle 14 are rotatably connected to the rotating shaft 11 from the outside of the connecting hole 122 through the shaft hole 111. ing. Thereby, both the lever handles 12 and 14 can be opened and closed in a direction close to or away from each other, and have a scissor-like configuration. In addition, each presser member 16 can be similarly opened and closed in conjunction with opening and closing of the connected lever handles 12 and 14.

When the pipe 2 is cut by the pipe cutter 1, first, the pipe 2 is placed on the receiving portion 13 of the lever handle 12. Then, the grip portions 121 and 141 of both lever handles 12 and 14 are gripped, and the tip ends of the lever handles 12 and 14 are brought close to each other. At this time, each pressing member 16 comes into contact with the upper outer peripheral surface of the pipe 2 placed on the receiving portion 13, and fixes the pipe 2 between the receiving portion 13.

  When the lever handles 12 and 14 are further gripped and brought close to each other, the cutting blade 15 enters the upper outer peripheral surface of the pipe 2 to cut the pipe 2 and each presser member 16 is received by the receiving portion 13 by the action of the torsion spring 17. The pipe 2 is pinched by being urged in the direction approaching the pipe 2. In the illustrated embodiment, since the pressing member 16 is provided on both sides of the cutting blade 15, the pipe 2 can be fixed from both sides of the cutting surface, and the pipe 2 is not displaced by a cutting operation and is stable. Can be pinched.

  Moreover, the pipe 2 cut | disconnected by this pipe cutter can be a thing of various diameter so that it may show in figure. The pipe 2 of any size can be cut while being clamped and fixed from above and below by the holding member 16 and the receiving portion 13.

  FIG. 4 is a side view showing a modification of the pipe cutter 1. The pipe cutter 10 is formed such that the cutting blade 15 provided on the lever handle 14 is hidden by the pressing members 16 on both sides of the cutting blade 15. In this case, the side surfaces of the cutting blade 15 and the pressing member 16 have substantially the same size, and can hold and fix the pipe 2 placed on the receiving portion 13 more stably, Since the cutting blade 15 is not exposed, the pipe 2 can be cut more safely.

  As described above, in the pipe cutter according to the present invention, the presser member comes close to the pipe in accordance with the cutting operation of the pipe, and the pipe can be held between the receiving portion. Cutting can be performed very easily with high accuracy, and the workability can be greatly improved. In addition, in the said form, although the holding member 16 of a pipe cutter is provided in the both sides of the cutting blade 15, this invention is not restricted to this, You may provide only in the one side of the cutting blade 15, and winding of a pipe It can be held and cut while correcting warps.

It is a side view of the pipe cutter which concerns on this invention. It is a perspective view of a pipe cutter concerning the present invention. It is a disassembled perspective view of the pipe cutter which concerns on this invention. It is a side view of the pipe cutter which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe cutter 11 Rotating shaft 12 Lever handle 121 Holding part 122 Connecting hole part 13 Receiving part 13a Slit 14 Lever handle 141 Holding part 142 Connecting part 143 Spring connection hole 15 Cutting blade 16 Holding member 161 Connection hole 162 Connection recessed part 17 Torsion Spring 18 Spacer 2 Pipe

Claims (1)

A pair of lever handles are connected to each other by a pivot shaft so as to be openable and closable. A pipe receiving portion is provided on the distal end side of one lever handle, and the pipe can be cut on the distal end side of the other lever handle. A pressing member capable of fixing the pipe between the cutting blade and the receiving portion,
The pressing member is pivotally attached to the other lever handle via a torsion spring, and is biased in the direction approaching the receiving portion,
A spring connection hole is provided eccentrically with respect to the shaft hole of the rotating shaft to which the lever handle and the presser member are coupled, and is provided above the side surface on the distal end side of the lever handle to which the presser member is pivotally attached. One end of the spring is connected to this spring connection hole,
A connection recess having a shaft hole and a connection hole of the rotation shaft is formed on the proximal end side of the presser member, and the other end of the torsion spring is connected to the presser member via a disk-shaped spacer in the connection recess. Connected to the connection hole,
When cutting the pipe, grasp the pair of lever handles so that the presser member comes close to the pipe, naturally holds the pipe placed on the receiving part, and fixes it between the receiving part. A pipe cutter characterized in that a blade can enter a pipe sandwiched between a holding member and a receiving part and can be cut while being stabilized by the holding member so that the pipe is not displaced.

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