JPH0451933Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is used to cut a flexible pipe made of a corrugated metal pipe in which the peaks and valleys are continuous in the longitudinal direction. This invention relates to a flexible pipe cutting tool.

[Prior Art] A conventional flexible pipe cutting tool of this type is disclosed in Japanese Utility Model Publication No. 38546/1983.
In such a conventional example, as shown in FIG. 5, a guide roller 2' is rotatably attached to the tip of the main body 1', and a movable body 3' is movably inserted into the base of the main body 1'. The movable body 3' is made freely movable in a spiral motion by operating the handle a, a pressing roller 4' is attached to the tip of the movable body 3', and a cutter wheel 5' placed at the tip of the movable body 3' is supported by the cutter. The cutter support 6' is supported by a body 6' and can be freely moved in and out by a feed screw mechanism 7' by operating a handle b.
When cutting the flexible tube 8', the moving body 3' is moved by operating the handle a to widen the distance between the guide roller 2' and the pressure roller 4' or the cutter wheel 5'. , a flexible tube 8' is provided between the guide roller 2' and the pressure roller 4'.
, move the movable body 3' so that the pressure roller 4' advances by operating the handle a, sandwich the flexible tube 8' between the guide roller 2' and the pressure roller 4', and operate the handle b. Then take out the cutter wheel 5' and bite the cutter wheel 5' into the flexible pipe 8', and in this state rotate the main body 1' around the flexible pipe 8' and cut it with the cutter wheel 5'. .

[Problems to be solved by the invention] By the way, in the above conventional example, what should be done with the handle a when the flexible tube 8' is sandwiched between the pressure roller 4' and the guide roller 2' during cutting or when the flexible tube 8' is removed after cutting? The movable body 3' must be rotated several times to move the movable body 3', which poses a problem in that this operation is troublesome and takes time.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the flexible tube cutting tool of the present invention has a rack 10 provided on the movable body 3 in the moving direction of the movable body 3, and a rack 10 that is connected to and disengaged from the base of the main body 1. A cutter support 6, which is provided with a locking pawl 11 that can be freely locked and supports a cutter placed at the tip of the movable body 3, is attached to the movable body 3 by a feed screw mechanism so as to be freely removable and removable. An operating shaft 15 that is orthogonal to the moving direction of the moving body 3 is rotatably attached to the base, and an operating lever 21 that rotates the operating shaft 15 is attached to the end of the operating shaft 15. 15 pivot supports 15
An eccentric shaft portion 15c is provided eccentrically with respect to a and 15b, and the eccentric shaft portion 15c is rotatably inserted into a fitting hole 16 provided in the retaining pawl 11. In other words, with the above configuration, the movable body 3 can be fixed by unlatching the pawl 11 and sliding the movable body 3, and then locking the pawl 11 to the rack 10 at an arbitrary position. Therefore, the operation of holding the flexible tube 8 between the guide roller 2 and the pressing roller 4 during cutting and the operation of removing the flexible tube 8 after cutting can be performed easily and without requiring time. to rotate the operating shaft 15 by operating the operating lever 21 while holding the flexible tube 8 between the guide roller 2 and the pressing roller 4 and locking the locking claw 11 to the rack 10. Due to the eccentricity of the eccentric shaft portion 15c, the retaining pawl 11 is moved toward the tip side by this amount of eccentricity, and the movable body 3 is moved toward the tip side so that it can be held between the guide roller 2 and the pressing roller 4. It became.

[Example] As shown in FIGS. 1 and 2 a and b, two guide rollers 2 are provided at the top and bottom of the approximately C-shaped main body 1.
are arranged in parallel, and each is rotatably mounted with a shaft pin 12. The guide roller 2 is made of a hard material such as metal or hard synthetic resin.
At the base of the main body 1, the tip is close to the guide roller 2.
The movable body 3 is slidably mounted so that it can be separated freely. The upper surface of this movable body 3 is held down by a guide pin 13. The distal end of the movable body 3 is bifurcated, and a press roller 4 is rotatably mounted on a shaft 14 that projects laterally from each of the bifurcated pieces. In this embodiment, the pressure roller 4 is made of an elastic material such as rubber or synthetic resin, but it may also be made of metal or the like. A rack 10 is provided on the lower surface of the movable body 3 in the moving direction of the movable body 3, and a locking portion 1 of a pawl 11 provided at the base of the main body 1 is provided.
1a is adapted to be releasably engaged. An operating shaft 15 is arranged at the base of the main body 1 in a direction perpendicular to the longitudinal direction of the movable body 3. This operating shaft 15
are the pivot supports 15a and 15b at both ends and the pivot support 15a,
15b and an eccentric shaft portion 15c, the shaft supports 15a and 15b are rotatably mounted on the main body 1. The shaft center A of the shaft support 15a and the shaft support 15
The axis B of b is concentric, but the axis C of the eccentric shaft portion 15c is eccentric with respect to the axes A and B of the shaft supports 15a and 15b. A fitting hole 16 is provided in the retaining pawl 11.
is drilled, and the eccentric shaft portion 15 is inserted into this fitting hole 16.
C is inserted. Further, a spring storage recess 17 is provided at the base of the main body 1, and a spring 18 stored in the spring storage recess 17 biases the locking pawl 11 so that the locking portion 11a can lock onto the rack 10. It's getting old. A stopper pin 19 is provided protruding from the side surface of the retaining pawl 11, and a half portion 20 is provided on the eccentric shaft portion 15c side of the shaft support 15a of the operating shaft 15, and the tip of the stopper pin 19 is inserted into this half portion 20. is located. An operating lever 21 is attached to the end of the shaft support 15a of the operating shaft 15 that projects toward the outside. When this operating lever 21 is rotated in the direction of arrow A from the state shown in FIG.
1 in the direction of arrow A, and the locking portion 11a separates from the rack 10. In this state, the movable body 3 can freely slide back and forth. When the state shown in FIG. 2 is restored, the retaining pawl 11 is returned by the force of the spring 18, and the retaining portion 11a is engaged with the rack 10. When the operating lever 21 is rotated in the direction of arrow B from this state, the operating shaft 15 rotates with the locking portion 11a locked to the rack 10.
Due to the eccentricity of the eccentric shaft portion 15c with respect to the shaft supports 15a and 15b, the retaining pawl 11 and the movable body 3 move forward together by the amount of eccentricity. When the operating lever 21 is rotated to the position shown by the imaginary line in FIG. 2, the stepped surface of the half portion 20 hits the stopper pin 19 and does not rotate any further. A cutter wheel 5 serving as a cutter is disposed between the two forked portions of the movable body 3, and is rotatably supported by a cutter support 6 disposed between the two forked portions. In this embodiment, a rotatable disc-shaped cutter wheel 5 is used as the cutter, but the cutter is not limited to the cutter wheel 5, and a knife-shaped cutter or other cutter may be used. good. The female threaded cylinder portion 22 at the base of the cutter support 6 is slidably inserted into the hollow portion of the movable body 3. A handle 23 is provided at the base end of the moving body 3.
A male threaded rod 24 protruding from the handle 23 is inserted into the hollow part of the moving body 3, and the tip of the male threaded rod 24 is inserted into the female threaded cylindrical portion 22.
It is screwed together. The female threaded cylinder portion 22, male threaded rod 24, and handle 23 constitute a feed screw mechanism 7, and by rotating the handle 23, the cutter wheel 5 moves in and out together with the cutter support 6. There is.

The flexible tube cutting tool of the present invention is constructed as described above, and the flexible tube is cut in the following manner. Move the operating lever 21 in the direction of arrow A in Figure 2.
direction to disengage the locking portion 11a of the pawl 11 from the rack 10 and move the movable body 3 backward;
A flexible tube 8 is inserted between the guide roller 2 and the pressure roller 4, and the moving body 3 is moved forward to insert the flexible tube 8 between the guide roller 2 and the pressure roller 4.
sandwich. At this time, the guide roller 2 and the pressing roller 4 come into contact with the peaks 8a of the flexible tube 8, and the cutter wheel 5 faces the valleys 8b. When the operating lever 21 is released in this state, the locking portion 1 of the pawl 11
1a is locked to the rack 10, and the movable body 3 does not move back and forth. From this state, when the operating lever 21 is rotated in the direction of arrow B in FIG. The flexible tube 8 is strongly clamped and held. The holding pressure at this time can be adjusted by changing the amount of eccentricity of the eccentric shaft portion 15c. When the cutter wheel 5 is moved forward by operating the handle 23 from the held state, the cutter wheel 5 bites into the valley portion 8b of the flexible tube 8 by a certain amount. Next, when the main body 1 is rotated around the flexible tube 8 as shown by the arrow in FIG. 1, the flexible tube 8 is cut by the cutter wheel 5. Operation lever 21 after cutting the flexible tube 8
is rotated in the direction of arrow A, the movable body 3 is moved backward, and the flexible tube 8 is pulled out.

[Effects of the invention] As described above, in the present invention, the movable body is provided with a rack in the direction of movement of the movable body, and the base of the main body is provided with a stopper that can be detachably engaged with the rack. The movable body can be fixed by releasing the latch of the movable body, sliding the movable body, and easily locking the pawl at any position. The operation of holding the flexible tube and removing the flexible tube after cutting is easier and less time consuming than with conventional screw mechanisms (in other words, fast forwarding and reversing is possible), and the flexible tube can be moved to the base of the main body. An operating shaft perpendicular to the direction of movement of the body is rotatably mounted, and an operating lever for rotating the operating shaft is mounted on the end of the operating shaft, and the operating shaft is eccentric with respect to the shaft support of the operating shaft. Since the eccentric shaft part is provided and the eccentric shaft part is rotatably inserted into the fitting hole provided in the locking pawl, the movable body is moved and the flexible tube is clamped between the guide roller and the pressing roller to stop it. With the pawl easily engaged, operate the operating handle to rotate the operating shaft, and the eccentric shaft will push the retaining pawl toward the distal end by the amount of eccentricity of the eccentric shaft through the fitting hole. The movable body can be moved in the direction of the tip, and as the movable body moves, the flexible tube is held tightly between the guide roller and the pressure roller, and it can be used for fast forwarding or fast reversing. Even with the clamping structure, the flexible pipe can be firmly held between the guide roller and the pressing roller, and the flexible pipe can be strongly clamped and cut reliably.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the flexible tube cutting tool of the present invention, Fig. 2a is a front view of the same, and Fig. 2b is
is a plan view of the same as above, FIG. 3 a is a cross-sectional view of the same as seen from the front, FIG. 3 b is a cross-sectional view taken along the line X-X of FIG. 2 a,
Fig. 4a is an exploded perspective view showing the retaining pawl and the operating shaft, Fig. 4b, c, and d are a plan view, front view, and side view of the operating shaft, and Fig. 5 is a partially cutaway view of the conventional example. It is a front view, and 1 is a main body, 2 is a guide roller, 3 is a moving body, 4 is a press roller, 5 is a cutter wheel,
6 is a cutter support body, 7 is a feed screw mechanism, 8 is a flexible tube, 10 is a rack, 11 is a locking pawl, 1
5 is an operating shaft, 15a and 15b are shaft supports, 15c is an eccentric shaft portion, 16 is a fitting hole, and 21 is an operating lever.

Claims (1)

[Scope of utility model registration request] The flexible tube is held by two or more guide rollers rotatably attached to the tip of the main body and a press roller rotatably provided at the tip of a moving body that is movably attached to the base of the main body. In a flexible pipe cutting tool that cuts the flexible pipe with a cutter while rotating around the flexible pipe, the movable body is provided with a rack in the moving direction of the movable body, and the base of the main body is provided with a locking claw that can be easily and detachably locked. A cutter support supporting a cutter placed at the tip of the movable body is attached to the movable body so that it can move in and out through a feed screw mechanism, and an operating shaft perpendicular to the moving direction of the movable body is rotatable at the base of the main body. At the same time, an operating lever for rotationally operating the operating shaft is attached to the end of the operating shaft, and the operating shaft is provided with an eccentric shaft portion that is eccentric with respect to the shaft support of the operating shaft, and is provided on the stopper. A flexible pipe cutting tool in which an eccentric shaft is rotatably inserted into a fitting hole.