JPH018252Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a traveling pipe material cutting device that cuts a pipe material running on a material feeding line to a fixed size while it is in a running state.

Conventionally, the pipe material cutting mechanism of this type of traveling pipe material cutting device has generally adopted a configuration in which the pipe material is cut by raising and lowering a cutting blade disposed on the machine base using a crank mechanism or the like. However, in this type of device, the cutting blade must be configured to perform a predetermined reciprocating motion using a machine base etc. that simultaneously reciprocates. had become complex or large.

The purpose of the present invention is to provide a device which solves these problems, has a simple structure, stable operation, and is suitable for high-speed driving.

Next, to summarize the configuration of the present invention, on the machine base,
A rotary blade for cutting pipe material with a semi-circular blade shape is arranged, and this rotary blade is equipped with a spline shaft or sliding key that transmits rotational driving force while allowing reciprocating motion corresponding to the reciprocating motion of the machine base. This is a traveling pipe material cutting device equipped with a shaft.

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

By arranging two guide shafts 1, 1 in parallel at a predetermined interval, and slidably inserting the guide shafts 1, 1 into brackets 3, 3 fixed to both sides of the machine base 2, Arranged so that it can freely move back and forth within the required range. The guide shafts 1, 1 are fixedly mounted on an external support.

A clamp mechanism for clamping the pipe P to be cut is disposed near one side of the center of the machine stand 2, and a rotary blade 5 for cutting the pipe material is disposed near the other side.

The clamp mechanism includes an immovable fixed part 6 having a semicircular groove on its inner surface, a movable fixed part 7 having a similar semicircular groove on the surface facing the fixed part 6, and a drive for moving the movable fixed part 7 back and forth toward the immovable fixed part 6. It consists of mechanisms. Note that the semicircular groove described above forms the lower blade. This drive mechanism includes, for example, a cam 4 provided on the boss of the rotary blade 5, and a return spring 4' interposed between the immovable fixed part 6 and the movable fixed part 7. Needless to say, the cam 4 is arranged on the boss and shaped so as to press the movable fixed part 7 against the stationary fixed part 6 in synchronization with the cutting operation of the rotary blade 5. The return spring 4' plays the role of returning the movable fixed part 7.

The rotary blade 5 is attached to the guide shafts 1, 1 of the machine base 2.
It is fixedly fixed in the circumferential direction and slidably in the axial direction on the spline shaft 8 arranged parallel to the spline shaft 8. Of course, instead of the spline shaft 8, it is also possible to install a shaft with a sliding key under the same conditions. A rotary drive body is connected to the spline shaft 8, if appropriate to a shaft with a sliding key, for rotation in the counterclockwise direction in FIG. This rotary drive body uses a variable drive source such as a DC motor, and shares the reciprocating drive mechanism of the machine base 2, which will be described later. The rotational driving force is transmitted to the spline shaft 8 (including a shaft with a sliding key; the same applies hereinafter) through a suitable gear train.

Further, as shown in FIGS. 1 and 4, the rotary blade 5 has a semi-circular concave blade portion formed at the tip of the approximately trapezoidal base, and the rear end of the base is engaged with the spline shaft 8. It is designed to be attached to a matching boss. The boss of the rotary blade 5 is supported by the frame 9 of the machine base 2 in a sandwiched state, and is configured to reciprocate on the spline shaft 8 in accordance with the reciprocating movement of the machine base 2.

On the other hand, the lower part of the machine base 2 is provided with a cam groove 10 as shown in FIG. A reciprocating drive mechanism consisting of a driven roller 12 that is fixed and fitted into a cam groove 10 of a drum cam 11 is provided. When the rotary drive body is operated in this manner and the drum cam 11 is rotated, the driven roller 12 and the machine base 2 connected thereto will reciprocate along the cam groove 10 over a required distance.

The relationship between the rotary blade 5 and the reciprocating drive mechanism is determined so that the rotary blade 5 enters the cutting operation of the pipe material P to be cut in the middle of the forward stroke of the machine base 2.

Since this embodiment is configured as described above, when cutting the pipe material P to be cut into a predetermined length, the device is first started, and the machine 2, which is stopped in the middle of the return stroke, is operated, and the reciprocating movement is started. Let it start.

Since the machine base 2 is stopped in the middle of the backward stroke as described above, it starts operating from the remaining backward stroke.

The pipe material P to be cut is fed by a material feeding device (not shown), and protrudes a predetermined length in front of the clamp mechanism during the backward stroke of the machine stand 2 and at the beginning of the subsequent forward stroke. At the same time, the forward stroke speed of the machine 2 operated by the reciprocating drive mechanism is synchronized with the material feeding speed, and then the clamping mechanism moves the pipe material P to be cut in a semicircle between the fixed parts 6 and 7. It is tightened and fixed in the groove. This cutting of the pipe material P to be cut is performed by the rotary blade 5 at approximately the middle of the outgoing stroke synchronous speed section of the machine base 2.
This is done by The rotary blade 5 reciprocates in response to the reciprocating movement of the machine base 2 and rotatably cuts the pipe material P to be cut at the predetermined time point. The rotational driving force of the rotary blade 5 is applied through the spline shaft 8 while maintaining its sliding state in the axial direction.

After that, the clamp mechanism becomes released, and the machine base 2
The speed decreases and then begins the go-around stroke. After the middle of the backward stroke, the above-mentioned operations will be performed in the same way.
That is, by repeating the above cycle, the pipe material P to be cut is continuously cut.

To briefly describe the process of transition to the subsequent cycle, the clamp mechanism is released and the machine base 2 drops below the synchronized speed, after which it passes through the homeward stroke and then returns to the aforementioned synchronized speed in the next outward stroke. Until the speed is reached,
The pipe material P to be cut continues to protrude in front of the clamp mechanism, and when the synchronous speed is reached, it protrudes a predetermined length.

In the above, the rotary blade 5 is mounted on a spline shaft 8 disposed parallel to the guide shafts 1, 1 of the machine base 2.
Since it is fixed in the circumferential direction and slidable in the axial direction, it reciprocates smoothly following the reciprocating movement of the machine base 2, and at the same time, a rotational driving force is applied.
That is, the reciprocating motion and cutting motion of the rotary blade 5 can be provided with an extremely simple configuration compared to the conventional example described above.

In addition, as described above, the cutting of the pipe material P to be cut by the rotary blade 5 is performed by a rotary operation, so high-speed operation can be easily obtained, and considerably high-speed cutting can be achieved compared to the conventional example. It is possible.

The rotary blade 5 is arranged so that, when cutting the pipe material P to be cut, the tip thereof traces an arcuate locus shown by a dashed line in FIG.

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

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a schematic front view of the same, Fig. 2 is a partially cutaway schematic side view of Fig. 1, and Fig. 3 shows the cam groove of the drum cam. FIG. 4 is a side view of the rotary blade, and FIG. 5 is an explanatory view showing the state in which the rotary blade cuts a pipe material to be cut. 1...Guide shaft, 2...Machine base, 3...Bracket, 4...Cam, 4'...Return spring, 5...Rotary blade, 6...Imovable fixed part, 7...Movable fixed part, 8 ... Spline shaft, 9 ... Frame, 10 ... Cam groove, 11 ... Drum cam,
12...Followed roller.

Claims (1)

[Scope of Claim for Utility Model Registration] A machine base is fixed to a bracket that is fitted into two parallel guide shafts so as to be able to slide back and forth, and a reciprocating drive mechanism for the machine base is configured below the machine base. A rotary blade having a semi-circular concave blade section at the tip of a substantially trapezoidal base is arranged on the machine base, and the rotary blade is rotated while allowing reciprocating motion corresponding to the reciprocating motion of the machine base. A drive mechanism for a rotary blade that transmits driving force is provided, a movable fixed part and a fixed fixed part for clamping the pipe material are provided oppositely in front of the rotary blade, and a return spring is provided between the two fixed parts. A return spring is provided to urge the movable fixed part to move away from the immovable fixed part under normal conditions, while a cam on the side of the rotary blade rotates together with the rotary blade to press the movable fixed part. A traveling pipe material cutting device comprising: a rotating blade that rotates and approaches a pipe material, the movable fixed part is pressed against the fixed fixed part by the cam, and the pipe material is clamped and fixed only when cutting by the rotary blade.