JPH0780797A - Device for cutting pipe in standard length - Google Patents

Abstract

PURPOSE:To provide a device for cutting a pipe in a standard length, which positively cuts in a standard length the pipe continuously formed while rotating. CONSTITUTION:A first travelling carriage 10 is provided on a base 3. A cutting blade 15a driven by a motor 15b is provided on the first travelling carriage 10. A second travelling carriage 20 is stationed at a predetermined front position in the pipe moving direction. On the second travelling carriage 20, a positioning roller 23d is provided which abuts against the tip end face P1 of the pipe when the pipe P is moved as far as a regular size position. Both the travelling carriages 10, 20 are interconnected to each other so that pipe cutting work may be executed while integrally moving both the travelling carriages 10, 20 in the same direction when the positioning roller 23d is pushed to the pipe moving direction by the pipe tip face P1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe constant length cutting device for cutting a pipe continuously formed while rotating into a predetermined length.

[0002]

2. Description of the Related Art For example, in the case of manufacturing a pipe used for a power cable protection tube, etc., Japanese Patent Laid-Open No. 54-991.
As described in Japanese Patent Publication No. 69, after a molding material layer is supplied onto a core die that rotates in the circumferential direction and moves in the axial direction to continuously form a pipe having a predetermined thickness, a pipe in front of the pipe is predetermined. At the position, the pipe is cut in the rotating state to finish to a fixed length.

A device for cutting such a pipe to a fixed length
Then, in the conventional case, the pipe is cut to a fixed length as shown in FIG.
The disconnecting device was being used. It rotates in the direction of arrow a
While moving continuously (arrow b)
Direction 10) base 10 which is slightly inclined forward and downward
The traveling carriage 101 with a brake is installed on the vehicle so that it can travel.
Roller chuck 102 for holding a pipe on the traveling carriage of
... Cutting driven by rotation of 102 and motor 103
Equipped with a blade 104 and in front of the moving direction of the pipe p
Toward the fixed position on the base 101
Is provided with a fixed length position detection switch 105 for detecting that
It is a success. And the tip surface p of the pipe p ₁Is a fixed length position inspection
When it touches the output switch 105, it rotates the pipe p.
By holding the chuck 102 in this state, the pipe
The traveling carriage 101 is made to travel according to the speed
Is used to rotate the cutting blade 104 to move in the pipe cutting direction.
By doing so, the pipe p is cut.

In order to cut a pipe that is continuously molded using this type of cutting device to a fixed length, the traveling carriage 101 is moved in the pipe moving direction in accordance with the molding speed of the pipe p, and in that moving direction. It is necessary to prevent the positional deviation between the pipe p and the cutting blade 104.
Therefore, it is necessary to reduce the traveling resistance of the traveling carriage 101 as much as possible.

On the other hand, when forming the pipe p as described above, the tip end side of the pipe to be cut bends downward due to the weight, and the pipe p bent downward must be cut vertically. In addition, the base 101 is provided with a front-down inclination as necessary, but even in that case, the brake is applied to the traveling carriage 101 so that the traveling carriage 101 does not run on its own, and the traveling carriage 101 travels according to the pipe forming speed. Is required. Also, care must be taken so as not to resist the propulsive force of the pipe p due to the molding even when the brake is applied.

[0006]

However, in the case of the conventional pipe constant length cutting device as described above, the pipe p is rotatably held by the chucks 102 ... 102 provided on the traveling carriage 101 to travel. Since the trolley 101 is running, if the running resistance increases even slightly due to over-braking of the trolley 101, the trolley 101 may not follow the pipe p or a travel delay may occur. As a result, a positional deviation occurs between the pipe p and the cutting blade 104, and the pipe p cannot be cut to a fixed length. Further, even when the way of applying the brake to the traveling carriage 101 is weak and the braking force is too small, the traveling carriage 101 is self-propelled along the inclination of the base 100 described above, and thus the pipe p and the cutting blade 104 are also provided. The positional relationship with and will be out of order.

Therefore, in order to prevent such a problem from occurring, in the conventional pipe constant length cutting device,
It was necessary to delicately balance the holding force of the chucks 102 ... 102 with respect to the pipe p with the running resistance of the running carriage 101. Further, even if the balance is once set in a balanced state, when the tilt angle of the base 100 is changed, the tilt angle must be reset and the adjustment for that purpose is extremely troublesome.

The present invention addresses such a problem, and when a pipe continuously formed while rotating is cut to a fixed length, a positional deviation between the pipe to be cut and the cutting blade is achieved. It is an object of the present invention to provide a pipe constant length cutting device capable of reliably cutting a pipe to a constant length by preventing the above.

[0009]

To achieve the above object, the present invention provides a traveling carriage provided on a base so as to be capable of traveling, a chuck for holding a pipe and a pipe cutting provided on the traveling carriage. With the cutting blade of, when it is detected that the pipe to be cut has moved to a predetermined fixed position above the base, the chuck is rotatably holding the pipe and the traveling carriage in the pipe moving direction. By moving the cutting blade in the pipe cutting direction while traveling, the pipe constant length cutting device for cutting the continuously formed pipe into a predetermined length dimension is characterized in that it is configured as follows. .

That is, a positioning member is provided in front of the pipe moving direction on the base so as to come into contact with the pipe tip surface when the pipe moves to a fixed length position, and the positioning member moves in the pipe moving direction by the pipe tip surface. When pushed, it generates a signal to detect the movement of the pipe to the fixed length position, and connects the traveling carriage and the positioning member so that the traveling carriage moves integrally with the positioning member in the same direction. To do.

[0011]

According to the above construction, a continuously molded pipe can be reliably cut into a predetermined length dimension as follows.

First, when the pipe reaches a predetermined fixed position above the base, a signal for detecting this is generated, and along with this, the pipe is rotatably held by a chuck on the traveling carriage and then the cutting blade. The cutting work is started.

Simultaneously with the detection of the movement of the pipe to the fixed length position, the tip end surface of the pipe abuts against the positioning member on the base, and in that state, the positioning member is positioned by further pushing the positioning member by the propulsive force accompanying the pipe molding. It moves together with the member.

At this time, since the traveling carriage is connected so as to move integrally with the positioning member, the moving speed of the positioning member, that is, the moving speed of the pipe tip surface (pipe forming speed) is the same as the basic speed. Travel on the platform in the direction of pipe movement. Therefore, the positional relationship between the cutting blade provided on the traveling carriage and the pipe to be cut is always kept constant. As a result, the positional deviation between the cutting blade and the pipe in the moving direction of the pipe is prevented, and the pipe is reliably cut to a fixed length.

When the base (or the traveling rail provided on the base) is inclined, the brake is set to a predetermined state in advance on the traveling vehicle so that the traveling vehicle does not travel by itself. Is good. Then, when the tilt angle is changed, the brake is adjusted accordingly, but at that time, even if the running resistance is slightly increased, the positioning member is pushed and moved by the pipe tip surface as described above. As a result, the traveling carriage also moves integrally with the pipe to be cut, so that there is no positional deviation between the cutting blade and the pipe.

[0016]

EXAMPLES Examples of the present invention will be described below. 1 and 2 are a front view and a plan view of a pipe constant length cutting device according to the present embodiment.

As shown in these figures, the pipe constant length cutting device 1 has a slight downward inclination (downward to the right in FIG. 1) (for example, an inclination of 0.5 °) via the support legs 2 ... ) -Shaped base 3 is provided. On this base 3, traveling rails 4, 4'are provided on both sides along the longitudinal direction.
Are attached, and the first traveling vehicle 10 and the second traveling vehicle 20 are provided so as to be able to travel along these traveling rails 4, 4 '.

In the present embodiment, the first traveling vehicle 10 has a pair of omniroll parts 12 and 1 for receiving pipes, which are arranged forward and backward in the moving direction (direction of arrow A) of the pipe P to be cut.
2'and 13, 13 'and a pair of left and right wheels,
A brake (not shown) is provided on the rear wheel 13, 13 'side of them.

Further, on the first traveling carriage 10, a pair of pipe holders 14 are arranged in the front and rear direction in the pipe moving direction.
14 and a pipe cutting portion 15 located between these pipe holding portions 14 and 14.

Of these, each of the pipe holding portions 14 and 14 is a pair of chuck rolls 14 for holding the pipe, which are rotatably provided so as to be located on both sides of the pipe path.
a, 14a and a chuck mounting member 1 for holding the same
Each cylinder 14c presses each chuck roll 14a to the pipe P side via 4b and 14b as needed. When the pipe P, which is continuously molded while rotating, moves to a predetermined standard position (chain line position in FIG. 2) on the base 3, each cylinder 14c is driven to chuck each chuck on the outer peripheral surface of the pipe. By pressing the roll 14a, the pipe P is held in a rotating state.

The cylinder 14c and the like are provided on a support member 14d extending in the lateral direction of the base 3.
By operating the handles 14e, 14e provided on one side thereof, it is possible to move the handle 14e, 14e as a whole along the support member 14d in the direction approaching the pipe path or in the opposite direction.

The pipe cutting unit 15 includes a disc-shaped cutting blade 15a for cutting a pipe, a motor 15b connected to a spindle of the cutting blade 15a via a belt to drive the cutting blade 15a to rotate. The cutting blade case is composed of a cylinder 15c, one end of which is connected to the cutting blade case and can move the cutting blade 15a and the motor 15b in the pipe cutting direction. Then, the pipe P moves to the fixed length position and the chuck rolls 14a ...
When it is held by 14a, by driving the cylinder 15c to move the cutting blade 15a in the pipe cutting direction,
The pipe P is cut at a predetermined position between the pipe holding portions 14, 14.

On the other hand, the second traveling carriage 20 has a pair of left and right wheels 21, 21 'and 22, 22' at the front and rear,
The first traveling carriage 10 is arranged in front of the first traveling carriage 10 in the pipe moving direction, and is connected to the first traveling carriage 10 via connecting members 5 and 5 whose lengths are adjustable so that the traveling carriage can travel at a predetermined distance. It is connected to one traveling carriage 10. Then, the second traveling carriage 20 is provided with a positioning means 23 having a positioning member which is a characteristic part of the present invention.

The positioning means 23 rotates a support shaft 23b extending in the lateral direction orthogonal to the pipe path to bearings 23a ... 23a arranged in the front part of the second traveling carriage 20 in the pipe moving direction. While being movably supported, a positioning roller (positioning member) 23 is attached to a roller mounting portion 23c fixed to the center of the support shaft 23b as shown in FIG.
d is rotatably provided around the center axis of the roller,
This is a structure in which one end of a thin lid 23f is connected to both ends of the support shaft 23b via connecting members 23e.

The cylinder 23f is used for the second traveling carriage 20.
Are arranged at both sides of the positioning rod 23d by rotating the support shaft 23b around the shaft center by a predetermined angle through the connecting member 23e by the withdrawal movement of these piston rods. It is configured so that it can be set at the standing position shown by the solid line in FIG. 1 or the tilted position shown by the chain line in FIG. 1 as required. In that case, when the tip end surface P ₁ of the pipe P is brought into contact with the positioning roller 23d in the standing position, the distance L from the contact position to the cutting position by the cutting blade 15a on the first traveling carriage 10 is the pipe P. The cutting length, that is, the standard length is set.

Then, when the pipe P moves to the standard position on the base 3 while being rotated by its molding while the positioning roller 23d is held at the standing position by both cylinders 23f, 23f, The pipe tip end surface P ₁ comes into contact with the positioning roller roller 23d to position the pipe at a fixed length position, and in that state, the positioning roller 23d receives the pipe propulsion force and is pushed in the pipe moving direction (direction A). , The second traveling carriage 20 and the first traveling carriage 10 connected thereto move as a whole to the predetermined position in the pipe moving direction in accordance with the moving speed of the pipe tip surface P ₁ , that is, the pipe forming speed, while In addition, a predetermined portion of the pipe P is cut by the cutting blade 15a on the first traveling carriage 10.

The second traveling carriage 20 is provided with an omni-roll portion 24 for receiving a pipe at the rear end thereof, and is provided with a fast-forward roll 25 and a driving motor 26 for the same at the center of the upper surface. . Among them, the fast-forward roll 25 is used for the positioning roller 2 after cutting the pipe P.
By driving the motor 3 after the 3d is tilted as shown by the chain line, the cut pipe P is fast-forwarded forward (to the right in FIG. 1 or FIG. 2).

In addition to this structure, in this embodiment, as shown in FIG. 1, 2 or 4, a positioning roller 23d is provided on one side of the second traveling carriage 20 after the pipe P is fast-forwarded. Confirmation sensors 6 for confirming that the pipe P is not present at the standing position when the pipe is raised from the chain line position to the solid line position shown in the figure, and the pipe moving direction is provided at each predetermined position of the base 3. In the opposite direction, the forward end detection sensor 7 for detecting the forward end of the first traveling vehicle 10 and the pressed portion (not shown) provided on the lower surface side of the first traveling vehicle 10 that has moved to the forward end in the opposite direction. A returning cylinder 8 for pushing the first traveling carriage 10 and the second traveling carriage 20 connected thereto to return to the initial position, and detecting that the first traveling carriage 10 has retracted from the forward end and returned to the initial position. After doing And the end detection sensor 9 are provided. Then, as described above, when the first traveling carriage 10 starts moving in the pipe moving direction from the initial position by the propulsive force of the pipe P that is in contact with the positioning roller 23d, the rearward end detection sensor 9 detects this. By generating the predetermined signal, it is detected that the pipe P is set at the predetermined fixed position, and accordingly, the cutting work by the cutting blade 15a and the pipe holding work by each chuck roll 14a are performed. Has become.

Next, the operation of this embodiment will be described. First, the first and second traveling carriages 10 and 20 in the pipe length cutting device 1 are cut in a state where the first and second traveling carriages 10 and 20 are in the initial positions shown by the solid lines in FIGS. 1 and 2 and the positioning roller 23d is held in the standing position. When the power pipe P moves in the direction of arrow A in FIG. 1 and reaches a predetermined position while rotating with the molding, the pipe tip surface P ₁ moves to the second position.
Positioning roller 23 in an upright state on traveling carriage 20
abut on d. At this time, the positioning roller 23d receives the rotational force of the pipe P when the pipe tip end surface P ₁ comes into contact with the pipe P while rotating, and therefore rotates, so that the rotation of the pipe P is not hindered.

Further, the distance L from the contact portion to the cutting position by the cutting blade 15a on the second traveling carriage 20 is the pipe P.
Since the cutting length dimension is set to, the pipe P is positioned at a predetermined standard position by contact with the positioning roller 23d. Then, in this state, the pipe P pushes the positioning roller 23d and tries to move further in the arrow A direction.

In this case, the second traveling carriage 20 provided with the positioning roller 23d and the first traveling carriage 1 behind the second traveling carriage 20.
Since 0 is connected via the connecting members 5 and 5 while maintaining a predetermined positional relationship, they start moving integrally in the direction of arrow A by the pipe propulsion force. When the movement is started, the first traveling carriage 10 is disengaged from the initial position, and at the same time, the rearward end detecting sensor 9 senses that the pipe P is set at a predetermined fixed position. As a result, the pipe cutting unit 15 and the pipe holding units 14 and 14 on the first traveling carriage 10 are operated. Therefore, the pipe P positioned at the fixed length position by contacting the positioning roller 23d is held in the rotating state by the chuck rolls 14a in the pipe holding portions 14 and 14 almost simultaneously with the positioning.
In this state, the cutting blade 15a, which is rotationally driven by the motor 15b of the pipe cutting unit 15, is moved in the pipe cutting direction by the cylinder 15c, whereby the cutting is started.

Thus, in the pipe cutting work, the first traveling carriage 10 and the second traveling carriage 2 are adjusted in accordance with the molding speed of the pipe P.
0 is run in the direction of arrow A, but if the positional relationship between the cutting blade 15a and the pipe P in the pipe moving direction is changed during that time, the pipe P will not be cut into a predetermined state.

However, in the pipe constant length cutting device 1, as described above, the first traveling carriage 10 and the second traveling carriage 20 are connected to each other through the connecting members 5 and 5 so as to maintain a fixed positional relationship with each other. With the pipe tip surface P ₁ in contact with the positioning roller 23d provided at a predetermined position on the second traveling carriage 20 and being positioned, the first and second pipe propelling forces acting on the positioning roller 23d. The traveling vehicles 10 and 20 move together in the direction of arrow A. That is, the first and second traveling carriages 10 and 20 travel on the traveling rails 4 and 4 ′ of the base 3 in the direction of arrow A at the same speed as the moving speed of the pipe tip surface P ₁ (pipe forming speed). To do. Therefore, the first traveling vehicle 10
The cutting blade 15a provided above and the pipe P to be cut
The positional relationship of is always kept constant. This allows
Positional deviation between the cutting blade 15a and the pipe P in the pipe moving direction is prevented, and the pipe P is reliably cut into a predetermined length dimension (standard length) while the first traveling carriage 10 travels to a predetermined forward end. Will be.

Further, after the pipe P is cut to a fixed length in this way, the cylinders 23f and 23f on the second traveling carriage 20 are cut.
And the positioning roller 23d is tilted to the position of the chain line, and the motor 26 is operated in that state to rotationally drive the fast-forward roller 25 in a predetermined direction, whereby the cut pipe P is fast-forwarded in the direction of arrow A. It And
The forward end of the first traveling vehicle 10 is detected by the forward traveling end detection sensor 7, the return cylinder 8 is activated accordingly, and the first traveling vehicle 10 is pushed back in the direction opposite to the arrow A direction. Both traveling carriages 10 and 20 are returned to the above-mentioned initial positions.

The brakes provided on the first traveling carriage 10 are provided on both traveling carriages 10 and 20 along the inclined base 3.
Is set in advance to prevent it from running on its own. Then, when the tilt angle is changed, the brake is also adjusted accordingly, but at that time, even if the running resistance is slightly increased, the positioning roller 23d is pushed by the pipe tip surface P ₁ as described above. By moving the traveling carriages 10 and 20 together with the pipe P, the positional deviation between the cutting blade 15a and the pipe P does not occur.

Further, in the above-described embodiment, when the first traveling carriage 10 starts moving in the pipe moving direction from the initial position by the tip end surface P _{1 of} the pipe contacting and pushing the positioning roller 23d, it is moved backward. The detection sensor 9 senses and generates a predetermined signal to detect that the pipe P has been set at a predetermined fixed length position. However, as another embodiment, the positioning roller is provided with a pipe tip. The positioning roller itself may detect that the surfaces are in contact with each other (for example, a contact-type sensor is provided on the positioning roller), and the positioning roller may detect that the pipe is set at the fixed length position. .

[0037]

As described above, according to the pipe constant length cutting device of the present invention, in the case of cutting a continuously formed pipe to a constant length, the pipe moving direction of the traveling carriage provided with the cutting blade A positioning member that moves integrally with the traveling carriage is provided at a predetermined position in front of the traveling carriage. Since they are configured to move together, the positional relationship between the cutting blade on the traveling carriage and the pipe to be cut is always kept constant. As a result, the positional deviation between the cutting blade and the pipe in the axial direction of the pipe can be reliably prevented, and the pipe can be reliably cut to a predetermined length dimension (standard length) while the traveling carriage travels a predetermined distance. be able to.

[Brief description of drawings]

FIG. 1 is a front view of a pipe constant length cutting device showing an embodiment of the present invention.

FIG. 2 is a plan view of the device.

FIG. 3 is a partially enlarged right side view showing a state in which the pipe tip surface is in contact with a positioning roller in the same apparatus.

FIG. 4 is a right side view of the same device, part of which is omitted.

FIG. 5 is a schematic perspective view showing a conventional pipe constant length cutting device.

[Explanation of symbols]

1 ... Pipe constant length cutting device 3 ... Base 10 ... Traveling carriage (first traveling carriage) 14a ... Chuck (chuck roll) 15a ... Cutting blade 23d ... Positioning member (positioning) Roller) P ... Pipe P ₁ ... Pipe tip surface A ... Pipe moving direction

Claims (1)

[Claims] 1. A pipe to be cut has a traveling carriage provided on a base so as to be capable of traveling, a pipe holding chuck and a pipe cutting blade provided on the traveling carriage. When it is detected that the pipe has moved to a predetermined fixed position above the base, the chuck holds the pipe rotatably and moves the cutting blade in the pipe cutting direction while moving the traveling carriage in the pipe moving direction. According to the pipe constant length cutting device for cutting a continuously formed pipe into a predetermined length dimension, when the pipe is moved to the fixed length position forward of the pipe moving direction on the base, the pipe tip surface is Is provided with a positioning member that comes into contact with, and when this positioning member is pushed in the pipe moving direction by the pipe tip surface,
A feature is that the traveling carriage and the positioning member are connected so that a signal for detecting the movement of the pipe to the fixed length position is generated, and the traveling carriage moves integrally with the positioning member in the same direction. A pipe constant length cutting device.