JP7377492B2 - pipe cutting equipment - Google Patents

Description

The present invention mainly relates to a pipe cutting device that can be used to cut synthetic resin pipes, particularly so-called fiber-reinforced resin pipes such as FRP and CFRP.

Conventionally, a synthetic resin pipe cutting device has an outer cylinder, an inner cylinder rotatably disposed at an eccentric position within the outer cylinder, and an inner cylinder rotatably disposed eccentrically in the same direction as the eccentric position within the inner cylinder. A shaft provided, a rotating means such as a motor for rotating the shaft, a disc-shaped cutter attached to the other side of the rotating means on the shaft, and an inverted L-shaped through hole formed in an outer cylinder. It is equipped with a handle, etc. that moves and rotates the outer cylinder and the inner cylinder together, and the entire device is inserted into the pipe to be cut, and the handle is moved along the through hole to cut the final cut. A pipe is known in which the entire circumference of the pipe is cut by the eccentrically positioned cutter.

Japanese Patent Application Publication No. 3-166008

The pipe cutting device mentioned in the previous section is for cutting pipes buried in the walls or foundations of construction sites from the inside, and not only is it time-consuming to operate, but it also cuts pipes that are not buried in the first place. It is not suitable for this purpose, and has disadvantages such as a complicated structure.

An object of the present invention is to provide a pipe cutting device that can easily and reliably cut so-called fiber-reinforced resin pipes such as FRP and CFRP.

The present invention according to claim 1 is provided with a chuck for gripping a pipe, a chuck rotation means for rotating the chuck, and a rail for moving the chuck in a front-back direction, and the chuck and the chuck rotation means are installed on a base. , a chuck moving means in which the base is disposed on a rail , a pair of left and right guide rollers that abut on both sides of the pipe, one or two support rollers that abut on the lower side of the pipe, and a chuck according to the outer diameter of the pipe. a guide roller interval adjustment means for adjusting the interval between the guide rollers, a support roller lifting means for raising and lowering the support roller according to the outer diameter of the pipe, a circular saw disposed above the pipe, and a circular saw for rotating the circular saw. The pipe is equipped with a circular saw rotation means and a circular saw lifting means for raising and lowering the circular saw relative to the pipe, and the pipe is gripped by a chuck and is supported by support rollers, and the pipe is regulated from left and right by guide rollers on both sides. A pipe cutting device that cuts a pipe P with a circular saw that descends from above while rotating the pipe.

The present invention as set forth in claim 2 provides the pipe cutting device as set forth in claim 1, wherein the chuck rotation means includes a central shaft protruding integrally and concentrically with the chuck, and a bearing portion rotatably supporting the central shaft. and a motor that rotates the central shaft via a belt or chain.

The present invention as set forth in claim 3 provides the pipe cutting device as set forth in claim 1 or 2 , wherein the base is disposed on a pair of left and right rails and is rotatably provided between the rails as the chuck moving means. The chuck is characterized in that it has a female thread that is screwed together with a rod-shaped male threaded member, and the chuck on the base is moved in the front and back direction by rotating the rod-shaped male threaded member.

The present invention as set forth in claim 4 provides the pipe cutting device as set forth in any one of claims 1 to 3, wherein the guide roller interval adjusting means is configured to adjust the interval between the base and the base in the left and right direction. A pair of plate-like members that are erected with space between each other and rotatably support each guide roller, female threads formed on both plate-like members to face each other, and a rod-shaped male thread member that is screwed into the female threads. The apparatus is characterized in that the interval between the guide rollers supported by both plate-like members can be changed by rotating the rod-like male screw member.

The present invention according to claim 5 provides the pipe cutting device according to any one of claims 1 to 4, wherein the support roller lifting means includes a support base rotatably supporting the support roller; a rod-shaped male screw member supporting the base; a female screw formed on the support base and screwed into the rod-shaped male screw member; a male-threaded member-side bevel gear attached to the lower end of the rod-shaped male screw member; An operating shaft is provided with an operating bevel gear that meshes with a bevel gear on the male threaded member side, and by rotating the operating shaft, the height of the support roller is adjusted via both bevel gears, the rod-shaped male threaded member, and the female thread of the support base. It is characterized in that its position can be changed.

The present invention according to claim 6 provides the pipe cutting device according to any one of claims 1 to 5, wherein the circular saw lifting means comprises a motor and a worm wheel attached to the rotating shaft of the motor. and a worm that engages with the worm wheel, and is attached to a post that supports a station that rotatably supports a circular saw.By rotating the motor, the height position of the circular saw can be changed via the worm wheel and the worm. is characterized in that it is adapted to be changed.

The present invention according to claim 7 provides the pipe cutting device according to any one of claims 1 to 6, wherein the circular saw rotation means is a motor provided at the station, and the circular saw rotation means is a motor provided at the station, and the belt or chain is rotated. The circular saw is rotated by a motor through the saw.

The present invention according to claim 8 provides a method for cutting a pipe using the pipe cutting device according to any one of claims 1 to 7, wherein the first step is to rotate a circular saw. At the same time, the circular saw is brought into light contact with the pipe to form streak-like cutting grooves all around the outer circumferential surface of the pipe. In the second step, while rotating the circular saw, the circular saw is deeply removed from the cutting groove. It is characterized by completely cutting the pipe at once by pushing it in.

According to the pipe cutting device of the present invention, after setting the pipe in the chuck and operating the motor to move the pipe to the cutting position, each handle is turned to adjust the spacing of the guide rollers according to the outer diameter of the pipe. After adjusting the height position of the support roller, the motor is rotated to rotate the pipe and the circular saw is rotated, and the pipe is cut by rotating the motor and bringing the circular saw into contact with the outer circumference of the pipe. .

Furthermore, in the pipe cutting described above, in the first step, while rotating the circular saw, the circular saw is brought into slight contact with the pipe to form a streak-like cut groove all around the outer circumferential surface of the pipe, and then in the second step As a step, the pipe can be cut easily and beautifully by rotating the circular saw and pushing the circular saw deeply through the cut groove to completely cut the pipe at once. In particular, such two-stage cutting allows composite material pipes such as FRP and CFRP, which are made of a matrix and filler, to be cut without fluffing the filler in the pipe or causing delamination. There is no so-called burr generation, and the pipe can be easily and beautifully cut. Further, in the cutting operation, it is preferable that the pipe and the circular saw are rotated in the same direction.

FIG. 1 is a side view of a pipe cutting device according to an embodiment of the present invention. It is a top view of the same pipe cutting device. It is a front view of the same pipe cutting device. It is a perspective view of the same pipe cutting device. It is an enlarged front view showing the structure of the support roller in the same pipe cutting device. It is an enlarged front view showing the holding state of the pipe in the same pipe cutting device. It is an enlarged perspective view showing the structure of guide rollers etc. in the same pipe cutting device.

Next, an embodiment in which the present invention is applied to a cutting device for fiber-reinforced resin pipes will be described with reference to the drawings, but the present invention is not limited to this embodiment.

As shown in FIGS. 1 to 7, a pipe cutting device 1 according to the present embodiment is provided on a table T, and includes a chuck 2 that grips a pipe P, a chuck rotation means 3 that rotates the chuck 2, A chuck moving means 4 that moves the chuck 2 in the front-back direction, a pair of left and right guide rollers 5A and 5B that abut on both sides of the pipe P, one support roller 6 that abuts the lower side of the pipe P, and a A guide roller interval adjustment means 7 for adjusting the interval between guide rollers 5A and 5B according to the outer diameter, a support roller lifting means 10 for raising and lowering the support roller 6 according to the outer diameter of the pipe P, and a support roller lifting means 10 for raising and lowering the support roller 6 according to the outer diameter of the pipe P; The pipe P gripped by the chuck 2 includes a circular saw 9 arranged therein, a circular saw rotating means 11 for rotating the circular saw 9, and a circular saw lifting means 12 for raising and lowering the circular saw 9 with respect to the pipe P. is supported by support rollers 6, and the pipe P is cut by a circular saw 9 descending from above the pipe P while rotating the pipe P with its left and right movement restricted by guide rollers 5A and 5B on both sides. This is how it is done.

In this embodiment, the chuck 2 is a split-jaw scroll chuck having three jaws 8 for gripping the pipe P.

As the chuck moving means 4, a chuck 2 and a chuck rotating means 3 are installed on a base 13. The base 13 and the chuck 2 thereon are moved in the front-rear direction by rotating the rod-shaped male screw member 14 with a motor M1.

The chuck rotating means 3 rotates the central shaft 16 via a central shaft 16 that protrudes integrally and concentrically with the chuck 2, a bearing portion 17 that rotatably supports the central shaft 16, and a belt B1. It is composed of a motor M2 that causes the Note that 17a in the figure is a ball bearing of the bearing portion 17.

The guide roller spacing adjustment means 7 is a pair of left and right plate-like plates having a base 18 and brackets 20 that are erected at intervals in the left-right direction on the base 18 and rotatably support the respective guide rollers 5A and 5B. The members 19A and 19B, the female screws 21 formed opposite to each other on both the plate-like members 19A and 19B, the rod-shaped male screw member 22 that is screwed into the female screw 21, and the rod-shaped male screw member 22 is attached to the base end thereof. The guide rollers 5A and 5B supported by the plate-like members 19A and 19B can be changed by rotating the rod-shaped male screw member 22 by operating the distance adjustment handle H1. It is designed so that Further, the plate-like members 19A and 19B are brought close to each other and separated from each other along two guide bars 30, and both ends of the guide bars 30 are formed into penetrating walls 51 that are erected on the left and right edges of the base 18. is supported by

More specifically, in this embodiment, the pair of left and right plate-like members 19A and 19B are a pair of front and rear guide bars constructed on a pair of left and right upright walls 51 erected at the left and right edges of the upper surface of the base 18. 30 , and the female screws 21 are screwed in opposite directions on the inner periphery of a ring-shaped member 27 that is integrally attached to both the plate-shaped members 19A and 19B. A rod-shaped male screw member 22 is screwed and inserted into the ring-shaped member 27.

The support roller lifting means 10 includes a support base 43 on which a bracket 40 that rotatably supports the support roller 6 is erected, a guide bar 44 that supports the support base 43, a rod-shaped male screw member 32, and the support base 43. The female thread 28 is engaged with the rod-shaped male threaded member 32, the male-threaded member-side bevel gear 31A attached to the lower end of the rod-shaped male threaded member 32, and the male-threaded member-side bevel gear 31A is engaged with the tip end thereof. It is equipped with an operation shaft 50 having a side bevel gear 31B, and by rotating a height adjustment handle H2 attached to the operation shaft 44, the male screw member 32 and the support base 43 are connected via both the bevel gears 31A and 31B. The engagement position of the female screw 28 is moved to change the height position of the support roller 6.

In this embodiment, the circular saw 9 is rotatably attached to a bracket 33, and the circular saw rotating means 11 is a motor M3 attached to a station 38, and a motor attached to a central axis M3a of the motor M3. The circular saw 9 is rotated via the side pulley 34, the circular saw pulley 35 attached to the central shaft 9a of the circular saw 9, and the belt B2 spanned between the circular saw pulley 35 and the motor pulley 34. is being done.

The circular saw lifting means 12 is attached to a motor M4, a worm wheel (not shown) attached to a rotating shaft 51 of the motor M4, and a column 53 that supports the station 38 that rotatably supports the circular saw 9. , has a gear mechanism 54 including a worm (not shown) that meshes with the worm wheel (not shown), and the meshing position of the worm wheel 52 and the worm 54 is moved by rotating the motor M4. The height position of the circular saw 9 can be changed by changing the height position of the circular saw 9.

Next, how to use the pipe cutting device according to this embodiment will be explained. After setting the pipe P in the chuck 2 and operating the motor M1 to move the pipe P to the cutting position, turn the handles H1 and H2. After adjusting the interval between the guide rollers 5A and 5B and the height position of the support roller 6 according to the outer diameter of the pipe P, the motors M2 and M3 are rotated to rotate the pipe P and the circular saw 9 is rotated. Then, the pipe P is cut by rotating the motor M4 and bringing the circular saw 9 into contact with the outer periphery of the pipe P. At this time, it is usually preferable to rotate the pipe P and the circular saw 9 in the same direction. In addition, as a first step, cutting into the pipe P with the circular saw 9 is performed by lightly contacting the circular saw 9 with the pipe P while rotating the circular saw 9, and cutting a striped groove on the entire outer peripheral surface of the pipe P. Then, in the second step, while rotating the circular saw 9, the circular saw 9 is pushed deeply into the cut groove to completely cut the pipe P at once. By the two-stage cutting as described above, the pipe can be easily and beautifully cut without fluffing the filler inside the pipe P or causing the surface layer to peel off, and without causing so-called burrs.

According to the pipe cutting device of the present invention, a composite material pipe such as FRP or CFRP consisting of a matrix and a filler can be cut without fluffing the filler in the pipe or causing delamination, and without causing so-called delamination. It is expected to be widely used in the field of composite materials because it can easily cut beautiful pipes without creating burrs.

1 Pipe cutting device 2 Chuck 3 Chuck rotation means 4 Chuck moving means 5A/5B Guide rollers 6 Support rollers 7 Guide roller interval adjustment means 9 Circular saw 11 Circular saw rotation means 12 Circular saw lifting means

Claims (8)

A chuck for gripping a pipe, a chuck rotation means for rotating the chuck, and a rail for moving the chuck in the front-back direction, and the chuck and the chuck rotation means are installed on a base, and the base is disposed on the rail. the chuck moving means, a pair of left and right guide rollers that contact both sides of the pipe, one or two support rollers that contact the bottom of the pipe, and the interval between the guide rollers is adjusted according to the outside diameter of the pipe. A guide roller interval adjustment means, a support roller lifting means for raising and lowering the support roller according to the outer diameter of the pipe, a circular saw disposed above the pipe, a circular saw rotating means for rotating the circular saw, and a circular saw rotating means for rotating the circular saw. The pipe is gripped by a chuck and is supported by support rollers, and the pipe is rotated from above with its left and right movement being regulated by guide rollers on both sides. A pipe cutting device adapted to cut pipe by means of a descending circular saw. The chuck rotating means includes a central shaft protruding integrally and concentrically with the chuck, a bearing that rotatably supports the central shaft, and a motor that rotates the central shaft via a belt or chain. 2. The pipe cutting device according to claim 1. As a chuck moving means, the base is disposed on a pair of left and right rails, and has a female thread that engages with a bar-shaped male threaded member rotatably provided between the rails, and by rotating the bar-shaped male threaded member. 3. The pipe cutting device according to claim 1, wherein the chuck on the base is movable in the front and back direction . The guide roller interval adjustment means includes a base, a pair of plate-like members that are erected at intervals in the left-right direction on the base and that rotatably support each guide roller, and a pair of plate-like members that are arranged opposite to each other on both the plate-like members. and a rod-shaped male screw member that is screwed into the female screw, and by rotating the rod-shaped male screw member, the interval between the guide rollers supported by both plate-shaped members can be changed. The pipe cutting device according to any one of claims 1 to 3, wherein: The support roller lifting means includes a support base that rotatably supports the support roller, a rod-shaped male screw member that supports the support base, a female screw formed on the support base and screwed with the rod-shaped male screw member, and a rod-shaped male screw member. It is equipped with an operating shaft having a male-threaded member-side bevel gear attached to the lower end of the threaded member and an operating-side bevel gear at its tip that meshes with the male-threaded member-side bevel gear, and by rotating the operating shaft, both the bevel gears and The pipe cutting device according to any one of claims 1 to 4, wherein the height position of the support roller is changed via the rod-shaped male screw member and the female screw of the support base. . The circular saw lifting means includes a motor, a worm wheel attached to the rotating shaft of the motor, and a worm that is attached to a column supporting a station that rotatably supports the circular saw and meshes with the worm wheel, The pipe cutting device according to any one of claims 1 to 5, wherein the height position of the circular saw is changed by rotating the motor via a worm wheel and a worm. The circular saw rotating means is a motor provided at the station, and the circular saw is rotated by the motor via a belt or chain. Pipe cutting equipment. A method for cutting a pipe using the pipe cutting device according to any one of claims 1 to 7, wherein, as a first step, the circular saw is lightly contacted with the pipe while rotating the circular saw. After forming a streak-like cut groove all around the outer circumferential surface of the pipe, the second step is to completely cut the pipe at once by pushing the circular saw deeply through the cut groove while rotating the circular saw. Features: Pipe cutting method.

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