JPH0741460B2 - Pipe cutting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tubular body cutting device for cutting the tubular body at a predetermined length by at least one set of cutters inserted into the tubular body from both ends in the axial direction. Regarding

[Prior Art] Conventionally, there has been used a device which automatically cuts a tubular body such as a bellows pipe into a predetermined length. For example, a device configured so that the tubular body is cut from the outer peripheral portion by the disk blade being orbitally driven via a drive gear and a driven gear provided on a mounting body that is mounted on the tubular body (Japanese Patent Laid-Open No. Sho 61-206). 55-106717 gazette) or a tip of a rotationally driven spindle is eccentrically attached to its holder, and a holder is attached to the holder. There is known a device (see Japanese Utility Model Publication No. 58-44979) configured to cut the tubular body from its inner peripheral portion by being rotationally driven in the tubular body.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technique, since a tubular body is cut through a single disc blade or a cutter, a particularly long tubular body is formed into a plurality of tubes at a predetermined length. When cutting, there is a problem that the cutting work becomes complicated and inefficient.

The present invention has been made in view of this type of problem, and provides a tubular body cutting device configured to efficiently and easily cut a tubular body of a desired length from a relatively long tubular body. The purpose is to

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a split clamp block that positions and holds an outer peripheral portion of a tubular body at at least two locations, and an axial outer side of the tubular body. A set of cutter heads arranged and movable in the axial direction, a spindle provided on the cutter head, and a cutter to be inserted into the tubular body are attached, and a shaft eccentric to the axis of the spindle is attached. And a holder rotatable on a line.

[Operation] In the tubular body cutting device according to the present invention configured as described above, after the tubular body which is the object to be cut is positioned and held by the clamp block, a set of cutters is provided from both ends of the tubular body to a predetermined position. It is inserted to the position and eccentrically moves under the rotating action of the spindle. For this reason, the tubular body is simultaneously cut into a plurality of pieces through one set of cutters, and the efficiency of the tubular body cutting work is achieved.

[Examples] Examples of the tubular body cutting device according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a tubular body cutting device according to this embodiment. This tubular body cutting device 10 includes a set of cutter heads 14 arranged on a base 12 so as to be movable back and forth in the direction of arrow X, a spindle 16 provided on each cutter head 14 and driven to rotate, and a cutting target. A cutter 18 that is inserted into the tubular body W, which is an object, and is rotatable about an axis that is eccentric to the axis of the spindle 16, and a split clamp block 20 that positions and holds the outer peripheral portion of the tubular body W at at least two locations. And an annular fixed blade 22 which is provided on the clamp block 20 in correspondence with the rotational position of the cutter 18 and cuts the tubular body W in cooperation with the cutter 18.

A pair of bases 24 are provided on both sides of the clamp block 20 on the base 12, and a servo motor 26 is provided on the base 24.
Cutter head can be moved back and forth in the direction of arrow X under the rotating action of
14 are provided. This cutter head 14 has a rotary drive source 28
Is fixed, the belt 30 that engages with the rotary drive source 28,
It is provided on a pulley portion 32 that is coaxially fixed to the spindle 16.

As shown in FIG. 3, the spindle 16 rotatably arranged on the cutter head 14 is eccentric (axis B) by a predetermined distance from the center of rotation (axis A) of the spindle 16 to form a first eccentric hole portion 34.
Is formed. The end of the first eccentric hole portion 34 has a second small diameter.
The eccentric hole portion 36 communicates with, and the key groove 38 communicates with the second eccentric hole portion 36.

One end of a rotary shaft 40 that constitutes an eccentricity adjusting mechanism is inserted into the second eccentric hole portion 36, and a key 42 that engages with the key groove 38 at this one end.
On the other hand, the other end of the rotary shaft 40 is provided with a slide member that engages with a cylinder 44 fixed to the cutter head 14.
It is supported by itself by 46. The rotating shaft 40 has a first eccentric hole portion.
The lead grooved hole portion 48 is formed coaxially (axis B) with the 34 and the second eccentric hole portion 36, and the lead grooved hole portion 48 and the first
An internal spindle 50 is arranged in the eccentric hole portion 34.

The internal spindle 50 is rotatably supported in the spindle 16 via a metal bearing 52 and the like, and has at one end thereof a lead shaft 54 that engages with the lead grooved hole portion 48 of the rotary shaft 40.
Is provided. A third eccentric hole portion 56 having an axis C is formed in the internal spindle 50 at a position eccentric to the axis B of the spindle 16 by the same distance as the axis A of the spindle 16, and a holder spindle 58 is formed in the third eccentric hole portion 56. It is rotatably supported.

A cutter holder 62 is coaxially fixed to the end of the holder spindle 58 via a screw 60, and a pair of disc-shaped cutters 18 are attached to the cutter holder 62 at a predetermined distance.

As shown in FIG. 4, the clamp block 20 includes a lower block 70 for arranging the tubular body W and an upper block 74 swingable with respect to the lower block 70 under the action of a cylinder 72 which is an actuator. With. This lower block 70
A support surface 76, which is semicircular and has a notch on the front side, is provided at both ends of the pipe W to hold the small diameter portion of both ends of the pipe W, and further, an annular shape for cutting the pipe W into a predetermined length. First semi-circular cutting blades 78a to 78d, which constitute the fixed blade 22 and have a function of positioning and clamping the tubular body W, are provided at predetermined intervals. Between the first semicircular cutting blades 78a to 78d, clamp members 80a to 80c having a semicircular shape and for positioning and holding the tubular body W are disposed.

The upper block 74 is swingably supported via a support shaft 82, and a piston rod 86 of a cylinder 72 engages with a clamp arm 84 fixed to the upper side of the upper block 74. The upper block 74 has a second semi-circular cutting edge 88 corresponding to the first semi-circular cutting edge 78a to 78d, which constitutes the fixed blade 22 similarly to the lower block 70.
a to 88d are formed and clamp members 80a to 8d
The semicircular clamp members 90a to 90c are fixed corresponding to 0c, and a pair of holding springs (elastic bodies) 92 are attached to positions corresponding to the pair of support surfaces 76.

Below the clamp block 20, a delivery mechanism 100 for delivering the cut tube W to the conveyor 98 is mounted. The payout mechanism 100 is a first block provided on the lower block 70.
Provided with groove portions 101a to 101f formed between the semicircular cutting edges 78a to 78d and the clamp members 80a to 80c, and provided with claw portions 104a to 104f which are integrally swingable via a support shaft 102. .
The claw portions 104a to 104f are integrally fixed to the plate body 106, and the locking pin 108 is fixed to the plate body 106. A swing arm 110 is freely engageable with the locking pin 108, and the claws 104a to 104f are supported by the support shaft 102 as a fulcrum under the action of a cylinder 112 as an actuator that engages with the swing arm 110. It is configured to swing freely.

The claw portions 104a to 104f are formed in an arc shape at a portion on which the tubular body W is placed, and have a linear shape directed toward the support shaft 102 side, and the tubular body W is easily formed on the surface thereof. Teflon treatment is applied to slip on.

On the opposite side of the conveyor 98 across the clamp block 20,
A chute 120 for loading the pipe W is disposed, and a transport mechanism 122 that holds the pipe W and can move up and down and horizontally is disposed between the chute 120 and the clamp block 20 (first). (See Figure 2).

Next, the operation of the tubular body cutting device 10 thus configured will be described.

First, the tubular body W located at the tip of the chute 120 is transported to the clamp block 20 side via the transport mechanism 122. Here, the upper block 74 is swung upward in advance via the clamp arm 84 under the driving action of the cylinder 72, and the tubular body W conveyed to this clamp block 20 side.
Both ends of the lower block 70 are positioned on the supporting surface 76 which is cut out on the front side and are positioned and arranged on the first semicircular cutting blades 78a to 78d and the clamp members 80a to 80c.

Next, the upper block 74 swings downward through the cylinder 72 with the support shaft 82 as a fulcrum, and engages with the lower block 70. Therefore, the tubular body W includes the first semicircular cutting edges 78a to 78d, the second semicircular cutting edges 88a to 88d, and the clamp members 80a to 8d.
0c and the clamp members 90a to 90c press and hold the outer peripheral surface thereof, and further, both ends thereof are supported by the supporting surface 76 by the leaf spring 92.
Is supported by pressing. As a result, the tubular body W is positioned and held, and the annular fixed blade 22 is formed via the first semicircular cutting edges 78a to 78d and the second semicircular cutting edges 88a to 88d. .

Here, the claw portions 104a to 104f constituting the payout mechanism 100 are
The lower block 70 is positioned corresponding to the groove portions 101a to 101f, and the outer peripheral surface of the tubular body W is freely engageable with the respective arc-shaped surface portions.

On the other hand, in each cutter head 14, the rotary shaft 40 is positioned at the original position, that is, the position shown by the solid line in FIG. 3, so that the cutter holder 62 axis C supported eccentrically with respect to the internal spindle 50. Coincides with the axis A of the spindle 16.

Therefore, each cutter head 14 has its own servo motor 26
Is driven by the base 24 to be displaced toward both ends of the tubular body W, and each cutter 18 enters inward from both ends of the tubular body W to a position corresponding to the fixed blade 22. Positioned. Next, the spindle 16 is rotationally driven in a predetermined direction via the belt 30 and the pulley section 32 under the driving action of the rotary drive source 28, and the spindle 16 is engaged via the key groove 38 and the key 42 to rotate. The shaft 40 is rotated while being supported by the slide member 46. The rotation of the rotary shaft 40 is transmitted to the internal spindle 50, and the slide member 46 and the rotary shaft 40 are displaced toward the tubular body W side by a predetermined distance via the cylinder 44 (see FIG. 3). , See the alternate long and two short dashes line). Therefore, the lead shaft 54 fitted into the lead grooved hole portion 48 of the rotation shaft 40 rotates together with the internal spindle 50 by a predetermined angle with respect to the spindle 16. Therefore, as shown in FIG. 5, the cutter holder eccentrically supported by the internal spindle 50
The axis C of 62 is displaced along the arcuate locus Y from a position that coincides with the axis A of the spindle 16. As a result, the cutter 18 cuts the tubular body W from its inner peripheral portion.

At this time, in the present embodiment, a set of cutter heads 14 is provided, and the cutting work is simultaneously performed by each cutter head 14, so that the tube cutting work is performed by a single cutter head as in the conventional case. As compared with the case, the efficiency of this tube cutting operation can be easily achieved.

Moreover, each cutter head 14 is provided with a pair of cutters 18 spaced apart by a predetermined distance. Therefore, in a single cutting operation of the pipe cutting device 10, the four cutters 8 are driven, and the three pipes W from which both unnecessary ends are removed are integrated via these cutters 18. To be obtained. As a result, it is possible to obtain the effect that the pipe cutting work can be efficiently performed all at once.

After the cutting work of the tubular body W by the cutter 18 is completed, when the cylinder 44 is driven and the slide member 46 and the rotary shaft 40 are integrally retracted, the lead shaft that engages with the rotary shaft 40.
54 rotates in the opposite direction, and the axis C of the cutter holder 62 is displaced toward the axis A of the spindle 16. Therefore, the cutter 18 is displaced toward the center of the tubular body W, and the axis C of the cutter 18 coincides with the axis A. Then, the rotary drive source 28 is de-energized and the servo motor 26 is driven to displace the respective cutter heads 14 in the direction in which they are separated from the tubular body W.

The tubular body W divided into three parts in the cutting operation is clamp members 80a to 80c and 90 which form the clamp block 20.
While being held by a to 90c, unnecessary both ends thereof are held by a support surface 76 whose front side is notched by a leaf spring 92. Therefore, the tube W after cutting is the clamp block.
The problem of falling from 20 and damaging the cutter 18 is eliminated.

Then, when the upper block 74 is oscillated upward through the cylinder 72 after the cutter 18 retracts outward from both sides of the tubular body W, after the cutting, the plate spring 92 holds the supporting surface 76 on the supporting surface 76. The unnecessary pipes W located on both sides are removed to the outside due to their own weight drop.

Next, the claw portions 104a to 104f are integrally swing-displaced through the swing arm 110, the locking pin 108, and the plate body 106 under the driving action of the cylinder 112 that constitutes the dispensing mechanism 100, and these claw portions are displaced.
The three pipes W arranged in 104a to 104f are sent out to the conveyor 98 side. Here, the claw portions 104a to 104f are formed with a surface portion that is changed from an arc shape to a linear shape, and the surface portion is subjected to Teflon treatment, so that the tubular body W extends along the surface portion. Smooth and reliable conveyor
It will be sent to the 98 side.

[Effects of the Invention] As described above, the tubular body cutting device according to the present invention has the following effects and advantages.

A set of cutters is inserted from both ends of the tube body positioned and held by the clamp block, and the set of cutters integrally move eccentrically under the rotating action of the spindle. Therefore, the tubular body is simultaneously cut into a plurality of pieces via the one set of cutters, and the efficiency of the tubular body cutting work is easily achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of a tubular body cutting device according to the present invention, FIG. 2 is a schematic side view of the tubular body cutting device, and FIG. 3 constitutes the tubular body cutting device. Fig. 4 is a longitudinal sectional view of a cutter head, Fig. 4 is a perspective explanatory view of a clamp block which constitutes the tubular body cutting device, and Fig. 5 is an explanatory view of axes of a spindle, an internal spindle and a cutter holder which constitute the tubular body cutting device. Is. 10 …… Pipe cutting device 14 …… Cutter head 16 …… Spindle 18 …… Cutter 20 …… Clamp block 22 …… Fixed blade 40 …… Rotating shaft 44 …… Cylinder 46 …… Sliding member 50 …… Internal spindle 58 …… Holder spindle 62 …… Cutter holder 70 …… Lower block 74 …… Upper block 76 …… Supporting surface 100 …… Discharging mechanism

Claims (3)

[Claims] 1. A split clamp block for positioning and holding an outer peripheral portion of a tubular body at at least two points, and a set of cutter heads arranged on both outer sides in the axial direction of the tubular body and capable of advancing and retracting in the axial direction. A tubular body provided with a spindle provided on the cutter head, and a holder to which a cutter to be inserted into the tubular body is attached and which is rotatable on an axis eccentric to the axis of the spindle. Cutting device. 2. The pipe cutting apparatus according to claim 1, wherein the clamp block includes a clamp member for fixing the pipe, and a fixed blade for cutting the pipe in cooperation with a cutter. A tube cutting device characterized by the above. 3. The tubular body cutting device according to claim 1, wherein the holder includes at least two cutters.