JP3293931B2 - Large diameter resin pipe scraper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper for separating the surface of a large-diameter resin tube.

[0002]

2. Description of the Related Art When laying a resin pipe or attaching valves and instruments to the resin pipe, it is necessary to peel off the surface of the resin pipe thinly. Are known was originally published in Japanese Patent actual opening flat 3-103101 as scraper for the release (cutter).

[0003]

However, the above-mentioned known scraper is effective for small-diameter pipes. For example, in the case of a large-diameter pipe having a diameter of 30 cm or more, the scraper goes around the pipe or cleans a cut line. It is inconvenient to exfoliate.

Therefore, the inventor of the present application sandwiches the tip of the tube between the capstan roller and the idler roller, revolves the scraper along the outer periphery of the tube using the capstan roller having the groove on the outer periphery as a driving wheel, and revolves the scraper. (Japanese Patent Application No. 4-13823) proposes a scraper which feeds a blade while stripping the surface of a tube spirally.
No. 8).

However, in the case of this scraper, there is no problem when the end face of the pipe is cut at a right angle, but in many cases, the end face is not cut at a right angle. Further, as shown in FIG. 7, a taper D in the radial direction may be attached to the distal end side of the pipe A in some cases. When the scraper is applied to a pipe having such a shape, the circumference around which the capstan roller revolves is different, and the scraper gradually moves away from the pipe during the revolving, and eventually comes off to the end face side. There's a problem.

The present invention has been proposed in view of the above points, and a scraper for a large-diameter resin pipe which does not come off even if the end face of the pipe is not right-angled or the tip end of the pipe is tapered in the radial direction. The purpose is to propose.

[0007]

The construction of the scraper for a large-diameter resin pipe according to the present invention is as follows.

[0008] Two capstan rollers 3, 3a are interposed
The capstan 2 mounted at a septum is attached horizontally with respect to the scraper body 1, the lower the capstan 2, a parallel to the capstan 2, and the spacing between the capstan 2 To be able to adjust
2 idler roller 10 of Ke to the arrangement of the low <br/> error shaft 9 mounted at intervals, to the capstan 2
Drive shaft 4 formed with motor connection 6 at the end is coaxial
A drive gear 5 is attached to the drive shaft 4 so as to freely rotate, and a feed screw 1 is provided parallel to the capstan 2 and on the side thereof from the front end to the middle.
9 mounting the drive screw 18 which is externally set in the main body 1, and that is engaged with this feed gear 20 is attached to feed gear 20 to the drive gear 5 to the drive screw 18, the feed screw 19 of the drive screw 18 Do not screw with the screw hole 22a
It is attached to the drive screw 18
The end side engages with the capstan 2 from above with a step 24
And a blade holder having a blade 27 attached to the lower surface.
That the rudder 22 is provided, above the capstan 2
To the main body 1 so that it is parallel to the capstan 2.
That the port shaft 26 is attached, the blade holder
A leaf spring 25 is attached to the upper surface of the
Contacting the support shaft 26 from below.
In large diameter scraper resin tube according to symptoms, peeling pairs
Also than the outer diameter of the capstan roller 3a located outside diameter of the capstan roller 3 located at the top side of the resin tube to be a elephant the opposite side to a larger diameter, for large diameter resin tube, wherein scraper.

[0009]

[Function] At the tip of the target resin tube, sandwich the thickness between the capstan and the roller shaft and push up the roller shaft so that the capstan roller does not slide on the surface of the resin tube. Crimp. Next, when the rotation shaft of the hand motor is connected to the motor connecting portion 6 of the drive shaft to drive the drive shaft, the capstan is driven together with the drive shaft, and the capstan roller rotates. As the capstan roller rotates, the body revolves around the outer circumference of the tube, and the blades cut into the surface cut into the surface. Then, when the drive gear is manually rotated after one rotation of the pipe, this rotation is transmitted to the drive screw via the feed gear, and the feed screw rotates. When the feed screw rotates, feed is applied to the blade holder meshed with the screw hole, and the blade holder moves in the pipe axis direction (groove direction) along the drive screw and the capstan. By this action, the blade makes a spiral cut into the surface. When the blade holder comes off the feed screw, the movement stops, and the surface peeling ends. The cutting amount of the blade is determined by the amount of pressing of the leaf spring by the support shaft. In this operation, the driving capstan roller for revolving the main body (scraper) has a larger outer diameter on the tip end side (groove side) of the pipe than the outer diameter of the inner capstan roller . Revolves around the outer circumference of the pipe with the direction contacting the end face. As a result, it does not come off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a scraper main body, on which a capstan 2 having two capstan rollers 3, 3a having a projection formed on the surface is mounted horizontally with a gap therebetween . A drive shaft 4 is coaxially connected to the capstan 2. The caps
Capstan rollers 3, 3a attached to the tongue 2
At the drive shaft 4 side (the base of the capstan 2)
The outer diameter of the capstan roller 3 on the side
Outer diameter of the capstan roller 3a located on the tip side of No. 2
It is slightly larger than the diameter. Reference numeral 5 denotes a drive gear which is fitted around the drive shaft 4 so as to freely rotate, and reference numeral 6 denotes a motor connecting portion formed at the tip of the drive shaft 4. Reference numeral 7 denotes two left and right support arms attached to the main body 1 by a ring shaft 8 so that the tip side can move up and down.
During the rollers 10 of the two positions is between the tip of the support arm 7
A roller shaft 9 rotatably mounted at a distance is rotatably mounted by a holder 11. 11 'is a holder shaft. The roller shaft 9 is parallel to the capstan 2 in the upper and lower directions, is provided with an interval where the thickness of the tube can freely enter, and has a generally U-shaped appearance when viewed from the side.

Reference numeral 12 denotes a screw hole 13 of the body 1
4 is a knob for adjusting the distance between the capstan 2 and the roller shaft 9 by screwing the distal end 15 into contact with the contact portion 16 of the support arm 7. 17 is a roller holder, 1
Reference numeral 8 denotes a side of the capstan 2 ,
A drive screw with a feed screw 19 rotatably attached to the main body 1 so as to be parallel to the tongue 2, and a feed gear 20 fixed to the drive screw 18 meshes with the drive gear 5. . Note that the feed screw 19 is cut off in the middle of the drive screw 18, and is located ahead of the drive screw 18.
A coil spring 21 is provided on the base side .

Reference numeral 22 denotes a blade holder which engages the capstan 2 from above via a stepped portion 24 with a screw hole 23 screwed into the feed screw 19 of the drive screw 18 as a fulcrum. A leaf spring attached to the upper surface of the blade holder 22 is used as the leaf spring 25.
Is a support shaft 2 attached to the main body 1 so as to be parallel to the capstan 2 on the capstan 2.
6 comes into contact with the blade holder 22 from below.
Is pressed from above.

Reference numeral 27 denotes a blade attached to the blade holder 22, and the direction of the blade 27 is perpendicular to the capstan 2 (the direction of the tube axis). 28
Is a blade holding screw, and 29 is a handle attached to the drive gear 5.

FIG. 5 shows a working example using the above-mentioned scraper. When the thickness of the groove of the resin tube A is inserted between the capstan 2 and the roller shaft 9 and the knob 12 is tightened, the support arm 8 is turned into a ring. The shaft rotates around the shaft 8 in the clockwise direction (FIG. 1), and as a result, the roller shaft 9 is horizontally pressed against the inner surface of the resin tube A by the rotating action about the holder shaft 11 '. By this action, the capstan rollers 3 and 3a of the capstan 2 bite into the surface B and the frictional force increases. At the same time, the blade 27 bites into the surface B. After the scraper has been set in the resin tube A in this manner, when the capstan 2 is driven by fitting the rotation shaft of a hand motor (not shown) to the motor connecting portion 6 of the capstan 2, the capstan roller 3, 3a travels along the outer peripheral surface B of the resin pipe A, and the outer diameter of the outer capstan roller 3 is larger than that of the inner capstan roller 3a. Revolves around the circumference. By this action, the blade 27 peels the surface B along the periphery. After one revolution,
When the drive gear 5 is rotated by rotating the handle 29 little by little while the capstan 2 is being driven, the feed gear 20 meshing with the handle is rotated, and the drive screw 18 is rotated. As a result, due to the action of the feed screw 19 and the screw hole 23 of the blade holder 22, the blade holder 22 moves rightward in FIG. 1 (FIG. 1), and the revolution of the main body 1 and the blade holder 22 (blade 2)
The blade 27 peels off the surface B of the resin tube A in a spiral shape by the moving action of 7). FIG. 6 shows this spirally peeled state, where C is a capstan impression. Spiral of resin tube A
After peeling the surface for a certain section , the blade holder 22
When the screw hole 23 is removed from the feed screw 19, the blade
The movement of the rudder 22 stops. However, since the coil spring 21 pushes the blade holder 22 back to the feed screw 19 side, when the handle 29 is rotated in the reverse direction, the feed screw 1
9 and the screw holes 23 of the blade holder 22 are engaged with each other, and the blade holder 22 can be returned to the original position in FIGS.

[0015]

The effects of the present invention are as follows.

A. By rotating the capstan roller with a hand motor by sandwiching the thickness of the groove of the resin tube between the capstan rollers, the resin pipe can be made to make a round while peeling off the surface with a blade. For this reason, the peeling operation can be performed easily and quickly in a large-diameter pipe.

B. By rotating the drive gear with the handle and transmitting this rotation from the feed gear to the drive screw (feed screw), the blade holder (blade) is moved along the pipe axis, and the surface is revolved by the action of the body's revolution. Can be peeled spirally.

C. By attaching the leaf spring to the blade holder and pressing the leaf spring with the support shaft, the peeling can be surely performed while adjusting the biting amount of the blade.

D. Capstan capstan roller
The outer diameter of the base side of the capstan is larger than the outer diameter of the tip side.
Because it is large, the main body (scraper) revolves in a direction in contact with the end face of the resin tube, and does not come off during this revolving.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of a scraper according to the present invention.

FIG. 2 is a plan view showing a capstan and a drive screw portion.

FIG. 3 is a front view of the scraper as viewed from a front end side.

FIG. 4 is a front view of the scraper as viewed from the front.

FIG. 5 is a perspective view showing a state in which a scraper is attached to a resin tube.

FIG. 6 is a perspective view of a state where the surface is spirally separated.

FIG. 7 is an explanatory view of an example in which the tip end side of the tube is tapered in the radial direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Capstan 3, 3a Capstan roller 4 Drive shaft 5 Drive gear 6 Support arm 9 Roller shaft 10 Roller 18 Drive screw 19 Feed screw 20 Feed gear 22 Blade gear 25 Leaf spring 26 Support shaft 27 Blade A Resin pipe B Surface

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-329709 (JP, A) JP-A-6-254718 (JP, A) JP-A-3-103101 (JP, U) (58) Field (Int. Cl. ⁷ , DB name) B23D 79/00 B23B 5/12 B29C 37/00

Claims (1)

(57) [Claims] 1. Two capstan rollers 3, 3a
The capstan 2 attached at intervals is attached horizontally with respect to the scraper body 1, the lower the capstan 2, a parallel to the capstan 2,
And to the arrangement of the b <br/> Ra shaft 9 the two positions idler roller 10 so that the distance can be adjusted mounted at intervals between the capstan 2, with respect to the capstan 2 the drive shaft 4 to form the motor connecting section 6 to the distal end the
A drive gear 5 is attached to the drive shaft 4 so as to freely rotate, and a feed screw is provided parallel to the capstan 2 and on the side thereof from the front end to the middle.
19 mounting a drive screw 18 which is externally set in the main body 1, and that is engaged with this feed gear 20 is attached to feed gear 20 to the drive gear 5 to the drive screw 18, the feed screw 19 of the drive screw 18 Into the screw hole 22a.
While being attached to the drive screw 18,
The free end engages the capstan 2 from above with a step 24.
And a blade holder having a blade 27 attached to the lower surface.
That the rudder 22 is provided, above the capstan 2
To the main body 1 so that it is parallel to the capstan 2.
That the port shaft 26 is attached, the blade holder
A leaf spring 25 is attached to the upper surface of the
Contacting the support shaft 26 from below.
In large diameter scraper resin tube according to symptoms, peeling pairs
Also than the outer diameter of the capstan roller 3a located outside diameter of the capstan roller 3 located at the top side of the resin tube to be a elephant the opposite side to a larger diameter, for large diameter resin tube, wherein scraper.