JPH08141802A - Coating layer separating device for outside coated pipe - Google Patents

Abstract

PURPOSE: To provide a coating layer separating device for an outside coated pipe lightweight and low-priced by arranging a handle member supporting the upper and lower sides of a cutting tool holding member rotatably and removably and having a handle at one end and a sliding member slidably provided at the other end. CONSTITUTION: A cutting tool holding member 27 is rotatably supported to a handle member 26 by an upper supporting pin and a lower supporting member, and the handle member 27 can be expanded by a sliding member 33 connected to an oblong hole 32 by a pin 34. As a result, even if the handle member 26 is rotated around a supporting shaft 25, the lower supporting member that supports the cutting tool holding member 27 is linearly guided by a guide member 28. The cutting tool holding member 27 thereby advances smoothly on machined material 22, and the resin coat of the machined material 22 is cut and removed by the cutting tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stripping device used for stripping a coating layer of an outer coating pipe used for gas pipes and water pipes.

[0002] Conventionally, for gas pipes and water pipes, plastic-lined steel pipes having a pipe inner circumference or a pipe outer circumference lined with a plastic such as polyethylene are often used for corrosion protection. When welding or mechanical joints (see FIG. 7) are used to connect such plastic-lined steel pipes, the linings need to be removed (in the case of mechanical joints, ring 4 is used to improve durability and strength).
Directly contact the steel pipe. ).

FIG. 8 is a diagram showing a conventional coating layer peeling device for an outer coating tube. This is the frame 1 as shown in the figure.
A chuck 13 that bites the work piece 12 is attached to a rotary shaft that is horizontally provided on the head unit 11 of 0, and the chuck 13 is arranged in the frame 10 while holding the work piece 12 It is designed to be rotationally driven by a motor.

Further, the frame 10 is provided with two horizontal and parallel guide shafts 14, 14 ', and the shaving head 1 is provided on the guide shafts 14, 14'.
5 is provided, and is reciprocally moved in the horizontal direction by the feed handle 16. Further, a plurality of shaving bites 17 are radially slidably arranged on the shaving head 15, and the cutting radius can be changed by an eccentric handle 18.

To remove the coating of the work material 12, the shaving bite 17 is set by the eccentric handle 18 at a position where the coating layer of the work material 12 can be cut, and then the chuck 13 and the work material 12 are rotated. While moving the shaving head 15 with the feed handle 16, the arrow A
The coating layer can be cut and removed by the shaving bite 17 by moving in the direction.

[0006]

The above-mentioned conventional apparatus for removing the coating layer of the outer coating tube requires a shaving head, two guide shafts, a feed handle for moving the shaving head, and the like. Since the rack needs to be processed into a guide shaft, there are problems that the number of parts is large, the weight is heavy, and the cost is high.

In view of the above conventional problems, it is an object of the present invention to realize a device for removing the coating layer of an outer coating tube which has a small number of parts, is lightweight and is inexpensive.

[0008]

SUMMARY OF THE INVENTION In the present invention, a frame, a rotary shaft horizontally provided on a head portion of the frame and driven to rotate by a driving means, and a workpiece mounted on the rotary shaft to be machined. A chuck that holds a material, a ring-shaped tool holding member that holds a cutting tool that can cut the coating layer on the outer periphery of the material that is bitten by the chuck, and the tool holder can be rotated and removed vertically And a handle member having a handle at one end and a slide member slidably provided at the other end, and a handle member rotatably supported on the frame via the slide member. And a guide member for guiding the handle member parallel to the central axis of the chuck.

In addition to this, the upper support member for supporting the bite holding member on the handle member has a pivot shaft and a spring for urging the pivot shaft downward, and the pivot shaft is urged by the spring. It is characterized in that it is disengaged from the bite holding member by pulling up against it, and the lower support member has a U-shaped groove that is engageably and disengageably engaged with a pin implanted in the bite holding member. It is characterized by Further, it is characterized in that the frame is provided with cutting means capable of cutting the material to be processed.

[0010]

In the present invention, as shown in FIGS. 1 and 3, the workpiece 23 is held by the chuck 23, and the chuck 23 and the workpiece 22 are rotated in the arrow A direction by a motor (not shown). On the other hand, the peeling mechanism 24 fits the cutting tool holding member 27 holding the cutting tool to the end of the rotating workpiece 22 and presses the handle 30 in the arrow B direction.

At this time, the bite holding member 27 is rotatably supported by the handle member 26 by the upper and lower support members 35 and 36, and the handle member 27 is slidable.
Since the handle member 26 is rotatable about the support shaft 25, the bite holding member 27
Since the lower support member 36 for supporting the workpiece is guided in the linear direction by the guide member 28, the cutting tool holding member 27 smoothly advances on the work material 22, and the cutting tool 39 cuts and removes the resin coating of the work material 22. can do.

[0012]

FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, reference numeral 20 denotes a frame, a head portion 21 of the frame 20 is provided with a rotation shaft (not shown) that is horizontally provided, and the chuck 2 that holds a workpiece 22 is provided on the rotation shaft.
3 is attached. Further, the chuck 23 and the rotating shaft are rotationally driven by a drive motor provided in the frame 20.

A peeling mechanism 24 for peeling the resin coating layer of the work piece 22 is provided on the front portion of the frame 20, that is, on the side opposite to the head portion 21. The peeling mechanism 24 includes a handle member 26 that is swingably supported by a support shaft 25 that is vertically implanted in the frame 20, and the handle member 26.
And a guide member 28 for guiding the cutting tool holding member 27 parallel to the center line of the rotating shaft.

Details of the peeling mechanism 24 will be described with reference to FIGS. The handle member 26 is a frame-shaped main body frame 2
A handle 30 is provided at one end of the slot 9, a slot 31 is formed at the other end, and slots 32 are formed in both side walls formed by the slot 31. A sliding member 33 is inserted into the slot 31, and a pin 34 is provided through the sliding member 33 so as to engage with the elongated hole 32, so that the sliding member 33 can slide with respect to the main body frame 29. Has become. The sliding member 33 is provided with a vertical hole at one end, and is rotatably supported by a support shaft 25 planted in the frame 20.

The bite holding member 27 has a ring shape, a front and rear concave groove 27a is formed in the lower surface thereof, and a pin 27b is vertically planted in the center thereof. The upper part is supported by the upper support member 35 and the lower part is supported by the main body frame 29 of the handle member 26 so as to be rotatable and detachable.

A bite holding portion 37 is provided on one side of the bite holding member 27, and the bite holding portion 37 is provided.
There is a slot 38 that opens to the inner peripheral surface from
When the cutting tool 39 shown in FIG. 6 is fixed to the cutting tool holding portion 37 with the screw 40 as shown in FIG. 3, the cutting edge 39a thereof can be seen through the inner peripheral surface of the cutting tool holding member 27.

The inside diameter of the bite holding member 27 is such that the front side of the bite 39 (the side closer to the chuck 23) is the work piece 22.
It is preferable that the outer diameter is slightly larger than the outer diameter and the rear portion is slightly larger than the outer diameter of the mother tube of the workpiece 22. Further, the front end face is preferably chamfered in order to facilitate fitting to the work piece 22.

The upper support member 35 for supporting the bite holding member 27 on the handle member 26 has a collar 41 as shown in FIG.
Pivot shaft 4 with a in the middle and knob 41b in the top
1 and a spring 42 for urging the pivot shaft 41 downward,
A holding cylinder 43 for accommodating them is inserted into a hole formed in an upper portion of the handle member 26 and fixed by a push screw 44, and the tip end portion of the pivot shaft 41 is fixed to the bite holding member 2.
It is adapted to be inserted into and engaged with a hole 45 provided in the No. 7.

Further, the bite holding member 27 is replaced with the handle member 2.
As shown in FIG. 5, the lower support member 36 that supports 6
A pin 2 having a cylindrical shape composed of an upper part and a lower part having a small diameter and a middle part having a large diameter, and the upper part of which is a pin 2 which is planted in a bite holding member 27
A U-shaped groove 36a that engages with 7b is formed so that the front side is open, and a ring-shaped groove 36b is formed in the middle portion. Then, the intermediate portion is inserted into the hole provided in the body frame 29 of the handle member 26, and the body 29 is pushed by the set screw 46.
Do not let go out.

As shown in FIGS. 2 and 3, the guide member 28 has a concave section and a predetermined length, and has a groove 28a.
The lower part of the lower support member 36 is engaged with and slides. The longitudinal direction of the guide member 28 is parallel to the center line of the rotation axis of the chuck 23, and
It is fixed to.

The operation of this embodiment thus constructed will be described below. First, as shown in FIG. 1, a workpiece (outer coating pipe) 22 is bitten by a chuck 23, and the chuck 23 and the workpiece 22 are rotated in the direction of arrow A by a motor (not shown). On the other hand, the peeling mechanism 24 fits the cutting tool holding member 27 holding the cutting tool to the end of the rotating workpiece 22 and presses the handle 30 in the arrow B direction.

At this time, the bite holding member 27 is rotatably supported on the handle member 26 by the upper support pin 35, the lower support member 36, and the lower support member 36, and the handle member 27 is attached to the elongated hole 32 by the pin 34. Since it can be expanded and contracted by the combined sliding member 33, the handle member 26
Even if the tool rotates about the support shaft 25, the bite holding member 2
Since the lower support member 36 supporting 7 is linearly guided by the guide member 28, the bite holding member 27 smoothly advances on the work material 22, and the cutting tool removes the resin coating on the work material 22. can do.

When exchanging the bite holding member 27 according to the size of the outer diameter of the work piece 22, the knob 41b of the upper support member 35 provided on the body frame 29 of the handle member.
The tip of the pivot shaft 41 and the bite holding member 27.
Can be disengaged from the hole 45 of the bite holding member 27 and the lower pin 27b of the bite holding member 27 can be easily disengaged from the U-shaped groove 36a of the lower support member 36.
Can be easily removed from the handle member 26.
The bite holding member 27 can be attached to the handle member 26 by reversing the above.

According to the present embodiment, the coating of the outer coating tube can be peeled by the peeling mechanism having a simple structure. Further, as shown in FIG. 1 in this embodiment, a cutting means including a metal saw 50 and a metal saw supporting arm 51 capable of supporting and rotating the metal saw 50 is provided in the frame 20.
By oscillating freely, it is possible to combine the removal of the outer coating and the cutting of the pipe with a single device.

[0025]

According to the present invention, a lightweight and inexpensive coating layer peeling device with an extremely simple structure can be realized, and particularly when it is portable, it contributes to the efficiency of the work of laying water pipes, gas pipes and the like. It is a big place to do.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a peeling mechanism in the embodiment of the present invention.

FIG. 3 is a sectional view showing a peeling mechanism in an example of the present invention.

FIG. 4 is a perspective view showing an upper support member that supports a bite holding member according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a lower support member that supports a bite holding member according to an embodiment of the present invention.

FIG. 6 is a diagram showing bytes in an embodiment of the present invention,
(A) is a side view, (b) is a plan view.

FIG. 7 is a cross-sectional view showing a mechanical joint.

FIG. 8 is a view showing a conventional coating layer peeling device for an outer coating tube.

[Explanation of symbols]

 20 ... Frame 21 ... Head part 22 ... Workpiece material 23 ... Chuck 24 ... Peeling mechanism 25 ... Support shaft 26 ... Handle member 27 ... Bit holding member 28 ... Guide member 29 ... Main body frame 30 ... Handle 31, 38 ... Slot 32 ... Long hole 33 ... Sliding member 34 ... Pin 35 ... Upper supporting member 36 ... Lower supporting member 37 ... Bite holding portion 39 ... Bite 41 ... Pivot shaft 42 ... Spring 43 ... Holding cylinder 50 ... Metal saw 51 ... Metal saw supporting arm

Claims (4)

[Claims] 1. A frame, a rotary shaft horizontally provided on a head portion of the frame and rotationally driven by a driving means, a chuck attached to the rotary shaft for biting a work material, and the chuck. A ring-shaped bite holding member that holds a bite capable of cutting the coating layer on the outer periphery of the work piece that has been bitten, a top and bottom of the bite holding member that are pivotably and detachably supported, and a handle at one end A handle member having a sliding member slidably provided at an end, a support shaft provided on the frame for rotatably supporting the handle member via the sliding member, and the handle member being the chuck. And a guide member that guides it in parallel with the central axis of the outer coating layer. 2. The upper support member for supporting the bite holding member on the handle member has a pivot shaft and a spring for urging the pivot shaft downward, and the pivot shaft resists the urging force of the spring. The coating layer peeling device for an outer coating tube according to claim 1, wherein the device is disengaged from the bite holding member by pulling it up. 3. The lower support member for supporting the bite holding member on the handle member has a U-shaped groove that is disengageably engaged with a pin implanted in the bite holding member. Item 2. A jacket tube stripping device according to Item 1. 4. The coating stripping device for an outer coating tube according to claim 1, wherein the frame is provided with cutting means capable of cutting a material to be processed.