JPS5914093Y2 - Pipe cutting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe material cutting device that cuts various types of moving pipe materials into desired lengths while stopping the pipe materials intermittently.

As a device for continuously cutting moving pipe materials, an upper blade that moves up and down and a fixed lower blade are arranged on a machine base that reciprocates along the material feeding line, and the machine machine runs at a speed synchronous with the material feeding speed. A device is known in which the upper blade descends to cut the pipe material.

Although it is not yet publicly known, the device invented by the present inventor and has already applied for a patent includes a reciprocating machine base, a clamp that also serves as a lower blade, a rotary blade for notching, and a rotary blade for cutting. There is a machine that is configured so that when the machine base synchronizes with the material feeding speed, the pipe material is clamped and fixed, and then the pipe material is sequentially notched with a notching rotary blade and then cut with a cutting rotary blade. .

This device has the greatest advantages over the former device in that it has a faster cutting speed, can cut shorter lengths, and does not leave dimples at the cut end of the tube.

However, since this equipment moves the machine back and forth and cuts the pipe material by synchronizing the machine base with the material feeding speed during the forward stroke, there is a theoretical limit to the shortest cutting length even with considerable effort. I have to admit that there is.

Therefore, the present invention was developed with the aim of providing a device that can cut pipe material as short as necessary, while retaining the advantage of the latter device in that no tangles occur.

To summarize the configuration of the present invention, an electrical or mechanical stopping mechanism that stops the running pipe material at a desired length;
A pipe material cutting system consisting of a clamping mechanism that clamps a stopped pipe material, a notching rotary blade that notches a predetermined position on the surface of the pipe material while the pipe material is being clamped, and a cutting rotary blade that cuts the pipe material at the notch position immediately after making the notch. It is a device.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, centering around the clamp mechanism 1,
Diagonally below to the right is a notch rotary blade 2 installed in a position where the notch blade can cut into the surface of the pipe while the pipe is being clamped, and diagonally below to the left is a rotary blade 2 installed in a position where the cutting blade can cut the pipe. A rotary cutting blade 3 is provided.

As the stop mechanism, a mechanical stopper mechanism 4 is used.
It is placed on the right side of the clamp mechanism 1 and extends in the front-rear direction.

As shown in FIGS. 1 to 3, the clamp mechanism 1 is basically constructed by combining a pair of clamp pieces 5, 5 with a shaft 6 in the shape of a pair of pliers.

In the lower portions of both clamp pieces 5, 5, semicircular grooves 7, 7 are formed on surfaces facing each other.

In addition, as particularly shown in FIGS. 2 and 3, clearances 5', 5' are formed at the lower parts of both clamp pieces 5, 5 through which the notch rotary blade 2 and the cutting rotary blade 3 can pass. It is.

The lower opposing surfaces of both clamp pieces 5, 5 are connected to the cam 8 described below.
, 8, a circular hole is formed by the semicircular grooves 7, 7.

The tube material 9 is thereby clamped.

Note that the semicircular grooves 7, 7 also serve as a lower blade.

The clamp mechanism 1 includes a cam mechanism for driving it.

As shown in Fig. 1, these are cams 8, 8 placed on both sides of the top of both clamp pieces 5, 5 and driven members provided on the tops of both clamp pieces 5, 5, respectively.In this case, fine adjustment is possible. It consists of an adjustment screw 10.10 screwed into the body and a return spring (not shown).

The cams 8, 8 have a defined outer shape as shown in FIG. 1, and as they rotate, they move the upper portions of the clamp pieces 5, 5 inward at a required time.

That is, the clamp pieces 5, 5 are brought into contact with each other at the lower opposing surfaces,
Clamp the tube material 9.

When the above-mentioned restriction by the cam 8.8 is released, the lower opposing surfaces of the clamp pieces 5, 5 are separated from each other by the notaturn spring.

The notch rotary blade 2 and the cutting rotary blade 3 are arranged as described above, and the clearance 5' between the clamp pieces 5, 5 is
, to allow passage through 5'.

The surface rotating blades 2 and 3 are rotationally driven by drive shafts that rotate in opposite directions.

For example, in FIG. 1, the notch rotary blade 2 must be rotated clockwise, and the cutting rotary blade 3 must be rotated counterclockwise.

Further, as shown in Fig. 2, the notch rotary blade 2 has a notch blade at the front end, and is of a cantilever type with the notch blade placed at a position where it can cut the surface of the pipe material with respect to the clamp piece. Similarly, the necessary cutting rotary blade has a cutting blade at the front end, and has a cantilevered structure in which the cutting blade is provided at a position where the cutting blade can cut the pipe material with respect to the clamp piece.

Note that 2', 3', 8', and 8' are gears, which are fixed to the drive shafts of the notch rotary blade 2, the cutting rotary blade 3, and both cams 8, 8, respectively.

Gears 2' and 3' have the same diameter and mesh with each other.

The gears 8', 8' have the same diameter and mesh with each other.

One gear 8' further meshes with an idle gear 11 having the same diameter, and the idle gear 11 meshes with a gear separately fixed to the drive shaft of the rotary cutting blade 3.

This gear has the same diameter as the idle gear 11.

The meshing relationship of these gears is determined so that the cutting rotary blade 3 cuts the tube material 9 immediately after the cutting rotary blade 2 cuts the tube material 9, and during the operation of such rotary blade 2. It is determined that the clamping operation of the pipe material 9 is performed.

Further, as shown in FIGS. 1 and 3, the stopper mechanism 4 has a guide shaft 12 disposed on the side (right side) of the clamp mechanism 1 so as to extend in the front-rear direction, and is slidable on the guide shaft 12. A reference part 13 is fixedly fitted into the reference part 13, a base part 14 is fitted to the reference part 13 so as to be fixed in the circumferential direction and slightly slidable in the axial direction, and the tip of the base part 14 extends from the base part 14 to a point on the advancement line of the tube material 9. Cage, pipe material 9
A stopper arm 15 that can stop the movement of the guide shaft 12, a driven arm 16 fixed to the guide shaft 12, and a drive cam 17 with which the driven arm 16 comes into contact.

The drive cam 17 is fixed to the drive shaft of the cam 8, and has an outer diameter as shown in FIG.

As the drive cam 170 rotates, the driven arm 16 rises and falls, and the stopper arm 15 rises and falls via the guide shaft 12, reference portion 13, and base portion 14.

The drive cam 17 determines the phase so that the driven arm 16 is raised and erected immediately after the notch cutting by the surface rotating blade 2.degree. 3, that is, the tip of the stopper arm 15 is raised.

Note that a switch is provided in the reference section 13.

That is, when the base 14 of the stopper arm 15 is pushed by the pipe material 9 being fed and comes into contact with the left inner surface of the reference part 13, the switch is activated, the material feeding device is stopped, and the clutch of this device is engaged. The surface rotating blades 2, 3, cams 8, 8, drive cam 17, etc. start operating.

Since this embodiment is configured as described above,
The pipe material 9 of metal, plastic, or other material can be cut to a desired length by operating as follows.

First, the reference portion 13 of the stopper mechanism 4 is moved along the guide shaft 12 according to the cutting length of the tube material 9, and is individually fixed at a predetermined position.

When the material feeding device is driven, the tube material 9 advances through the semicircular grooves 7, 7 of the clamp mechanism 1, comes into contact with the tip of the stopper arm 15, slides the stopper arm 15 slightly, and stops.

As soon as the length of the tube material 9 is measured, the clutch of this device is engaged and the driving state is established, and as shown in FIG. abutting each other, thus the tubing 9 has semicircular grooves 7,7
is clamped by.

Of course, the material feeding device stops at the same time as the measurement of the tube material 9.

Subsequently, the notching rotary blade 2 passes through the clearance 5' between the clamp pieces 5, 5, and cuts the surface of the tube material 9.

Immediately after that, the cutting rotary blade 3 passes through the same location and cuts the tube material 9 at the notch position.

A dimple-free cut end is thus obtained.

Immediately thereafter, the restriction by the cams 8, 8 is released, and the lower opposing surfaces of the clamp pieces 5.5 are separated from each other by the action of the no-turn spring, and the clamping of the tube member 9 is released.

At about the same time, due to the action of the drive cam 17,
The tip of the stopper arm 15 is raised through the driven arm 16, the guide shaft 12, etc., and the tube material 9 is allowed to advance.

After the pipe material 9 cut in this way has traveled a predetermined distance,
The material is delivered to the required location.

If there is no change in cutting dimensions, continuous cutting can be performed by making the above cycle a -cycle.

Note that the following stopping mechanism may be used instead of the stopper mechanism 4.

That is, an electrical length detection mechanism is attached to the feeding device for the tube material 9, and this detects the length of the tube material 9 that has been fed, and the length determined in advance is reached by a known control device. The material feeding device is stopped at this point.

Of course, the above-mentioned "predetermined length" can be changed.

Even when the stop mechanism is configured as described above, it can be used in the same manner as in the previous embodiment.

Since this device is constructed as described above and operates as described above, it has the advantage that the cutting dimensions of the pipe material 9 can be easily changed and cutting of extremely short lengths is also possible. .

Furthermore, since a notch is made with the cutter rotary blade 2 at the intended cutting position before cutting with the cutter rotary blade 3, there is also the advantage that no dimples are formed at the cut end of the tube material 9.

As understood from the above description of the embodiments, the present invention can sufficiently achieve the intended purpose.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view showing the rotary blade and the lower part of the clamp piece, and FIG. 3 is a side view of FIG. It is an explanatory diagram. 1... Clamp mechanism, 2... Rotary blade for notching, 3... Rotary blade for cutting, 4... Stopper mechanism, 5...・Clamp piece, 5'...
...Clearance, 6...Shaft, 7...
・Semicircular groove, 8...Cam, 9...Tube material, 10...Adjustment screw, 11...Idle gear, 12...・Guide shirt) ~, 13...
...Reference part, 14...Base, 15...
...stopper arm, 16...follower arm,
17... Drive cam, 2', 3', 8'...
····gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A clamp mechanism equipped with a clamp piece for clamping a pipe material, and a notch blade at the front end, the notch blade being located in a position relative to the clamp piece so that it can cut the surface of the pipe material. a cantilever-type rotary blade for notching, and a cantilever-type rotary blade for cutting, which has a cutting blade at the front end and is provided in a position relative to the clamp piece where the cutting blade can cut the pipe material; During clamping, the notch rotary blade passes through the clearance of the clamp piece and cuts a predetermined position on the surface of the pipe material, and immediately after making the notch, the cutting rotary blade passes through the clearance of the clamp piece at the notch position. A pipe material cutting device characterized in that it is configured to cut a pipe material by.