JP4865288B2 - Tube cutting device. - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe cutter capable of automatically cutting a pipe along its axial line. <P>SOLUTION: A storage recess 26 vertically extending on a front face 22a is formed on the front face 22a of a slantly standing holding member 22. A pipe P to be cut is received in the storage recess 26. In this case, the recess 26 receives the pipe P in such a state that a half or more of the pipe P in its radial direction protrudes forward from the recess 26. Further, a cutting machine 3 is movably provided along the holding member 22 at the upper end of the member 22. When the cutting machine 3 moves downward by its own weight, a band saw 35 of the cutting machine 3 cuts the pipe P received in the storage recess 26 into two front and rear equal parts. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a tube cutting device for cutting a tube with a band saw.

  Conventionally, various cutting apparatuses for cutting a tubular body with a band saw have been proposed. For example, Patent Document 1 below proposes a band saw device that automatically cuts a tubular body with a band saw.

JP 2001-25919 A

  However, any of the conventional cutting devices using a band saw cuts a tubular body in a direction perpendicular to the axis, and there is no cutting device that bisects the tubular body along the axis. Therefore, there has been a demand for the development of a cutting device for cutting a tube body along its axis.

The present invention is to meet the above-mentioned demand, and the first invention is a tubular body cutting device for cutting a straight tubular body along its axis, and the tubular body is provided with a longitudinal direction thereof. A holding body that is held in a state in which the direction is directed in the vertical direction, and a cutting machine that is movably supported by the holding body along the longitudinal direction of the tubular body, and the cutting machine is mounted on the holding body. A frame attached to be movable along the longitudinal direction of the tubular body, an endless belt-like band saw provided on the frame, and a rotation driving means provided on the frame for rotating the band saw; However, it has an inclined plane that inclines so as to protrude forward as it goes downward, and in this inclined plane, an accommodating recess that extends obliquely up and down along the inclined plane is formed. Tube Its radial is protruded more than half, and the left-right direction along the longitudinal direction and the inclined plane is substantially immovably accommodating, portion cutting the tube body of the band saw is, in the radial direction of the tube The center is arranged to move left and right along the inclined plane, and the holding body has a base, the inclined plane, and the receiving recess, and the inclination angle of the inclined plane is variable. A holding member provided at the base so as to be rotatable about a horizontal axis extending in parallel with the inclined plane, and a fixing means provided between the base and the holding member and fixing the holding member to the base The frame of the cutting machine is provided on the holding member .
In this case, the upper Symbol rotation drive means, respectively disposed above the holding both end portions projecting to the left and right from the member of the frame, a drive pulley and the driven pulley is rotatably supported by the frame, is provided in the frame A motor that rotates the drive pulley, the band saw is wound between the drive pulley and the driven pulley, and the band saw is located between the drive pulley and the driven pulley. It is desirable to cut the tube.
It is desirable that the part of the band saw that cuts the tubular body is located on a vertical line passing through the center of gravity of the cutting machine.
A second invention is a tube cutting device for cutting a straight tube body along its axis, a holding body for holding the tube body in a state in which the longitudinal direction thereof is directed in the vertical direction, A cutting machine movably supported by the holding body along the longitudinal direction of the tubular body, and the cutting machine is attached to the holding body so as to be movable along the longitudinal direction of the tubular body And an endless belt-like band saw provided on the frame, and a rotation driving means provided on the frame for rotating the band saw. The holding body is inclined so as to protrude forward as it goes downward. The inclined flat surface is formed with an accommodation recess extending obliquely in the vertical direction along the inclined plane, and the tubular body projects more than half of the radial direction in the accommodation recess, and Longitudinal direction The part that cuts the tubular body of the band saw is substantially immovably moved in the left-right direction along the inclined plane, and moves in the radial center of the tubular body to the left and right along the inclined plane. The site | part which is arrange | positioned and cut | disconnects the said pipe body of the said band saw is located on the vertical line which passes through the gravity center of the said cutting machine, It is characterized by the above-mentioned.

  According to the present invention having the above-described characteristic configuration, the tubular body can be cut along its axis as follows. First, the cutting machine is set at a position above the tubular body of the holding body, and the band saw is rotated by the rotation driving means. Thereafter, the cutting machine is brought into a state where it can freely move in the vertical direction with respect to the holding body. In such a state, the cutting machine moves downward due to its own weight. As a result, the band saw cuts the tube body from the upper end surface along the axis.

The best mode for carrying out the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, a tubular body cutting device 1 according to the present invention includes a holding body 2 and a cutting machine 3.

  The holding body 2 includes a base portion 21, a holding member 22, and a support member (fixing means) 23. The base 21 is horizontally arranged on the floor surface F with its longitudinal direction directed in the front-rear direction (left-right direction in FIG. 2). The holding member 22 is disposed in a state where the longitudinal direction is inclined by an angle θ with respect to the horizontal plane. The angle θ is set to about 70 ° to 80 °, for example. The lower end portion of the holding member 22 is supported by the bracket 24 so as to be rotatable about a horizontal axis extending in the left-right direction. The support member 23 is disposed between the support member 21 and the holding member 22, and an upper end portion of the support member 23 is supported by the holding member 22 so as to be rotatable about a horizontal axis extending in the left-right direction. It is connected to the base 21 so that the position can be adjusted in the front-rear direction. By adjusting the position of the lower end portion of the support member 23 in the front-rear direction, the inclination angle θ of the holding member 22 can be appropriately changed. A fixing mechanism (not shown) is provided between the base portion 21 and the lower end portion of the support member 23, and the lower end portion of the support member 23 can be fixed at an arbitrary position. Therefore, the inclination angle θ of the holding member 22 can be changed to an arbitrary size although it is within a predetermined size range.

  The front surface (inclined plane) 22a of the holding member 22 is configured by a plane and is inclined at an angle θ. A groove 22b extending over the entire length of the holding member 22 is formed on the front surface 22a. The groove 22b is formed along the front surface 22a. Therefore, the groove 22b is also inclined at an angle θ, and the depth from the front surface 22a is constant over the entire length of the groove 22b. On the bottom surface of the groove 22b, a plurality of (three in this embodiment) partition plates 25 extending along the longitudinal direction of the groove 22b are provided. Each partition plate 25 has the same width as the depth of the groove 22b. Therefore, the front side surface of each partition plate 25 is located on the same plane as the front surface 22a. Each partition plate 25 is arranged at equal intervals in the width direction (left-right direction) of the groove 22b. Thus, the groove 22b is equally divided in the width direction, and a plurality (four in this embodiment) of accommodating recesses 26 extending in parallel with each other along the front surface 22a are formed. A lower end portion of each housing recess 26 is closed by an end plate 27. The front side surface of the end plate 27 is positioned on the same plane as the front surface 22a.

  A straight tube P to be cut by the cutting device 1 is inserted into each receiving recess 26 in a state in which the longitudinal direction thereof coincides with the longitudinal direction of the receiving recess 26. The tubular body P inserted into each housing recess 26 is supported by the end plate 27 when the lower end surface thereof abuts against the end plate 27. The depth of the accommodating recess 26 is slightly shallower than half of the outer diameter of the tube P. Therefore, the tubular body P is housed in the housing recess 26 in a state in which more than half of the front side protrudes forward from the housing recess 26. The width of the housing recess 26 is set to be approximately the same as the outer diameter of the tube body P. Therefore, the tubular body P is housed in the housing recess 26 so as not to move in the left-right direction. Note that an escape prevention member 28 is provided at the lower end of the holding member 22 in order to prevent the lower end of the tube body P from coming out of the housing recess 26 forward.

  The cutting machine 3 has a frame 31. The frame 31 is attached to the holding member 22 so as to be movable in the longitudinal direction. A driving pulley 32 and a driven pulley 33 are rotatably provided at both left and right ends of the frame 31. The drive pulley 32 is rotationally driven by a motor 34 provided on the back surface of the frame 31. A band saw 35 having an endless belt shape is wound between the drive pulley 32 and the driven pulley 33. Therefore, when the motor 34 is started, the band saw 35 wound around the pulleys 32 and 33 is rotated. As is clear from this, the drive pulley 32, the driven pulley 33 and the motor 34 constitute a rotational drive means for the band saw 35.

The frame 31 is provided with a pair of guide rollers 36, 36 between the holding member 22 and the drive pulley 32 and the driven pulley 33. The lower portion of the band saw 35 wound around the pulleys 32 and 33 is inserted between the pair of guide rollers 36 and 36 and between the other pair of guide rollers 36 and 36. As a result, the position and posture of the band saw 35 are regulated so that the lower part of the band saw 35 can cut the tube P from the upper end surface along the axis of the tube P on the tube diameter line. Yes. That is, a lower portion (hereinafter referred to as a cutting portion) 35a of the band saw 35 that cuts the tubular body P has a width direction equal to the longitudinal direction of the tubular body P so as to face the front surface 22a of the holding member 22. The posture is determined so that the thickness direction faces the radial direction of the pipe body P. Moreover, the cutting part 35a is arranged so as to pass right and left on the diameter line of the tube P so that the tube P can be divided into two equal parts on the diameter line. Further, as shown in FIG. 2, when the cutting portion 35 a is viewed from the left-right direction as the moving direction, the blade portion 35 b that cuts the tubular body P of the cutting portion 35 a is on the vertical line passing through the center of gravity G of the cutting machine 3. It is also arranged so as to be located almost directly below the center of gravity G. The blade portion 35b of the band saw 35 is directed obliquely downward so that the tubular body P can be cut.

  When cutting the tubular body P by the cutting device 1 having the above configuration, the tubular body P is inserted into the housing recess 26 and the lower end surface thereof is placed on the end plate 27. Next, the motor 34 is activated to drive the band saw 35. Thereafter, the cutting machine 3 is manually moved downward so that the cutting portion of the band saw 35 is substantially in contact with the upper end surface of the pipe P. Then, the hand is released from the cutting machine 3. Then, the cutting machine 3 moves downward by its own weight, and the cutting part 35a contacts the upper end surface of the pipe P. As a result, the cutting part 35a starts to cut the tube P from its upper end surface. At this time, since the cutting part 35a is located directly below the center of gravity of the cutting machine 3, the cutting part 35a can efficiently cut the tubular body P. The cutting machine 3 moves downward by its own weight while cutting the tubular body P by the cutting part 35a. When the cutting machine 3 moves downward to a predetermined position and cuts the tubular body P over its entire length, the motor 34 is stopped by a limit switch (not shown) provided at the lower end of the holding member 22. At the same time, the cutting machine 3 is stopped by a stopper (not shown) provided at the lower end of the holding member 22.

  When cutting another pipe P after completing the cutting of the pipe P, the cutting machine 3 is moved upward to a predetermined position and the cut pipe P is taken out from the housing recess 26. Thereafter, the above procedure may be repeated.

  Thus, according to this cutting device 1, it is possible to cut the tubular body P so as to bisect the diameter line. Moreover, since the cutting machine 3 moves downward due to its own weight, the tube P can be automatically cut.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it can change suitably.
For example, in the above embodiment, four pipes P are cut at the same time, but only one pipe P may be cut. In that case, it is only necessary to attach one tubular body P to any of the accommodating recesses 26. As is clear from this, only one receiving recess 26 may be formed.

It is a front view which shows one embodiment of this invention. It is a side view of the embodiment. FIG. 3 is an enlarged view taken along arrow X in FIG. 2. FIG. 2 is an enlarged view taken along arrow X in FIG. 1.

Explanation of symbols

G Center of gravity P of cutting machine Tubing body 1 Tubular cutting device 2 Holding body 3 Cutting machine 21 Base 22 Holding member 22a Front (inclined plane)
23 Support member (fixing means)
26 receiving recess 31 frame 32 driving pulley 33 driven pulley 34 motor 35 band saw 35a cutting part (part for cutting the tube)

Claims (4)

A tube cutting device for cutting a straight tube along its axis,
A holding body that holds the tubular body in a state in which the longitudinal direction thereof is directed in the vertical direction, and a cutting machine that is movably supported by the holding body along the longitudinal direction of the tubular body,
The cutting machine is provided on the holding body so as to be movable along the longitudinal direction of the tubular body, an endless band-shaped band saw provided on the frame, and provided on the frame to rotationally drive the band saw. Having rotational drive means;
The holding body has an inclined plane that is inclined so as to protrude forward as it goes downward, and an accommodation recess that extends obliquely in the vertical direction along the inclined plane is formed on the inclined plane. The tubular body protrudes more than half of its radial direction, and is accommodated substantially immovably in the left-right direction along the longitudinal direction and the inclined plane ,
The part of the band saw that cuts the tubular body is disposed so as to move right and left along the inclined plane in the radial center of the tubular body,
The holding body has a base, the inclined plane, and the receiving recess, and rotates around the horizontal axis extending parallel to the inclined plane in the base to make the inclination angle of the inclined plane variable. A holding member provided in a possible manner, and a fixing means provided between the base and the holding member for fixing the holding member to the base, and the frame of the cutting machine is provided on the holding member. and tube cutting apparatus, characterized in that it is. The rotational driving means is disposed at both ends of the frame protruding left and right from the holding member and is rotatably supported by the frame. The driving pulley and the driven pulley are provided on the frame, and the driving pulley is provided. And the band saw is wound between the drive pulley and the driven pulley, and the band saw is disposed at a portion located between the drive pulley and the driven pulley. The tube cutting device according to claim 1, wherein the tube cutting device is cut. The cutting apparatus according to claim 1 or 2, wherein a portion of the band saw that cuts the tubular body is located on a vertical line passing through the center of gravity of the cutting machine. A tube cutting device for cutting a straight tube along its axis,
A holding body that holds the tubular body in a state in which the longitudinal direction thereof is directed in the vertical direction, and a cutting machine that is movably supported by the holding body along the longitudinal direction of the tubular body,
The cutting machine is provided on the holding body so as to be movable along the longitudinal direction of the tubular body, an endless band-shaped band saw provided on the frame, and provided on the frame to rotationally drive the band saw. Having rotational drive means;
The holding body has an inclined plane that is inclined so as to protrude forward as it goes downward, and an accommodation recess that extends obliquely in the vertical direction along the inclined plane is formed on the inclined plane. The tubular body protrudes more than half of its radial direction, and is accommodated substantially immovably in the left-right direction along the longitudinal direction and the inclined plane ,
The part of the band saw that cuts the tubular body is disposed so as to move right and left along the inclined plane in the radial center of the tubular body,
The cutting device characterized in that a portion of the band saw for cutting the tubular body is located on a vertical line passing through the center of gravity of the cutting machine.

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