JP2020023028A - Scraper device - Google Patents

Abstract

To provide a scraper device that can be used for tubes or joint members of a plurality of inside diameters, including small inside-diameters, without replacing a fixing portion for each tube diameter.SOLUTION: A scraper device 1 that spirally scrapes a peripheral surface of a tubular end of a resin tube or joint member by means of a blade chip 2, comprises: a cylindrical fixed sleeve 11 inserted into the tubular end; a movable sleeve 12 movable on an outer periphery of the cylindrical fixed sleeve; a plurality of chuck members 14 abutting on an internal surface of the tubular end; a plurality of fist links 15 movably coupling the fixed sleeve and one end of each chuck member; a plurality of second links 16 coupling the other end of each chuck member and the movable sleeve; and a holding mechanism 13 that moves the movable sleeve along an extending direction of the cylindrical fixed sleeve and holds the plurality of chuck members in contact with the internal surface of the tubular end.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a scraper device used for shaving an outer peripheral surface of a tubular end portion of a pipe member or a joint member used as a gas pipe or a water pipe.

For gas pipes and water pipes, pipes and joints made of resin such as polyethylene are used instead of conventional metal pipes.
In particular, in the case of connecting a pipe made of resin to another pipe or a joint at a construction site, the outer peripheral surface of the tubular end of one of the pipes is scraped by a scraper device, and fitted to the other tubular end, and the electric power is supplied. Are fused and connected.

  For this reason, it is desirable that the outer peripheral surface of the tubular end after being scraped on site by the scraper device be as smooth as possible. If there is unevenness on the outer peripheral surface of the tubular end portion after the shaving process, if unevenness occurs in the interval with the inner surface of the other tubular end portion, unevenness of energization or melting tends to occur. As a result, even when the two tubular ends are fused and connected by electric current, a portion that is not fused with sufficient strength occurs, or a portion that cannot have sufficient durability occurs. there is a possibility.

Japanese Utility Model Laid-Open No. 06-063203 JP 2001-121302 A JP 2010-247275 A

  By the way, the tubular end of the tube or the joint member has a large inner diameter of several hundred mm, and a small inner diameter of several tens mm.

In the scraper devices disclosed in Patent Literature 1 and Patent Literature 2, a pantograph mechanism including a pair of long arms crossing each other is provided between a cylindrical fixing sleeve and a chuck member. Then, by setting up the pantograph mechanism between the sleeve and the chuck member, the chuck member moves largely away from the sleeve and presses against the inner surface of the tubular end. Moreover, by employing the pantograph mechanism, the pantograph mechanism can be used while being fixed to a plurality of tubular ends having different tube diameters.
However, when the pantograph mechanism is provided between the sleeve and the chuck member, the outer diameter of the fixing portion by the chuck member becomes large even when the pantograph mechanism is folded to the minimum. As a result, a scraper device employing a pantograph mechanism cannot be inserted into a tubular end having a small inner diameter of, for example, 40 mm, 30 mm, 25 mm, or 20 mm, which is 50 mm or less.

Therefore, as disclosed in Patent Document 3, in a scraper device inserted into a tubular end portion having a small inner diameter, the fixing portion pushes up by sandwiching the chuck member from front and rear. By adopting a structure in which nothing is disposed between the sleeve and the chuck member, the outer diameter of the fixed portion by the chuck member can be reduced, and it becomes possible to insert the fixed portion into the tubular end having a smaller inner diameter. .
However, in a fixed portion having a sandwiching structure as in Patent Document 3, the chuck member cannot be moved so as to be largely separated from the sleeve. It is difficult to fix one fixing portion to a plurality of pipe diameters. As a result, in the scraper device adopting the fixing portion of the sandwiching structure, it is necessary to prepare a plurality of fixing portions formed for each pipe diameter and exchange the fixing portion for each inner diameter of the tubular end to be worked and use it. No.

  As described above, in the scraper device, it is required that a plurality of inner diameter pipes or joint members including a small inner diameter pipe member or a joint member can be used without replacing a fixing portion for each pipe diameter. ing.

  The scraper device according to the present invention, the outer peripheral surface of the tubular end by applying a blade tip to the outer peripheral surface of the tubular end of the resin pipe material or the joint member and rotating and rotating around the axis of the tubular end. A spiral scraper device, wherein a fixing portion inserted and fixed to the tubular end portion to support the blade tip so that the blade tip can be rotationally fed around a shaft of the tubular end portion, A tubular fixed sleeve that is arranged along the axial direction of the tubular end while being inserted into the tubular end, and is movable on the outer periphery of the tubular fixed sleeve in the extending direction of the fixed sleeve. A movable sleeve, a plurality of chuck members abutting on the inner surface of the tubular end, a plurality of first links movably connecting the fixed sleeve and one end of each of the chuck members, and the other end of each of the chuck members. A plurality of second links for movably connecting the movable sleeve and the movable sleeve along a direction in which the cylindrical fixed sleeve extends, and a plurality of chuck members are provided on the tubular end. And a holding mechanism for holding in a state of hitting the inner surface.

  Preferably, the first link and the fixing sleeve are located at a position closer to a central axis of the cylindrical fixing sleeve at a front end portion of the fixing sleeve than an outer diameter of the cylindrical fixing sleeve. And be connected.

  Preferably, the connecting portion of the first link with the fixing sleeve is connected at a position closer to the central axis of the tubular fixing sleeve than the connecting portion with the chuck member. , And good.

  Preferably, the connecting portion between the first link and the fixing sleeve is the most cylindrical of the fixing sleeve among the connecting portions of the fixing sleeve, the first link, the chuck member, and the second link. It is good to be located near the central axis of.

  Preferably, the first link is formed to be longer than the second link.

  Preferably, the chuck member has a curved contact surface along a minimum inner diameter for the tubular ends of a plurality of tubing or coupling members having different inner diameters.

  Preferably, the chuck member has a convex portion protruding toward the fixed sleeve on a surface on a side in contact with the fixed sleeve.

  Preferably, a shaft inserted into the cylindrical fixing sleeve, a body to which the shaft is attached, and the blade tip attached to a tip portion, extending from the body along the cylindrical fixing sleeve. An arm to which the blade tip is swingably attached to the body so as to swing toward and away from the outer periphery of the tubular end; and A biasing member for biasing the blade tip, and a separation member provided on the body for holding the arm such that the blade tip is separated from the outer periphery of the tubular end portion against the biasing force of the biasing member. And a member.

In the present invention, by moving the movable sleeve along the axial direction of the cylindrical fixed sleeve by the holding mechanism by the screw fitting of the fixed sleeve and the movable sleeve and the clamp knob, the first link and the second link The chuck member is sandwiched from both sides, and the chuck member is pushed up so as to be separated from the fixed sleeve.
Therefore, in the present invention, there is no need to provide an elastic member or a pantograph mechanism for pushing up the chuck member from the fixed sleeve between the chuck member and the fixed sleeve.
As a result, in the present invention, the virtual minimum diameter of the fixing portion in a state where the plurality of chuck members are in contact with the periphery of the fixing sleeve can be reduced to the necessary minimum. The fixing portion of the present invention can be inserted into and fixed to a small-diameter tubular end portion having a diameter of, for example, 25 mm.

Further, in the fixing portion inserted and fixed to the tubular end portion, the plurality of chuck members are separated from the fixing sleeve so as to be sandwiched by the plurality of sets of the first link and the second link, and are attached to the inner surface of the tubular end portion. Hit it. Thereby, the fixing portion is fixed to the tubular end.
Therefore, the fixing portion of the present invention can be inserted and fixed to the tubular ends of a plurality of pipes or coupling members having different inner diameters, including a tube or coupling member having a small inner diameter. The scraper device can be used for shaving the outer peripheral surface of the tubular end without replacing the fixing portion for each pipe diameter. The scraper device of the present invention can be fixed to a plurality of small inner diameter tubular ends, for example 50 mm to 25 mm, using the same fixing part.

FIG. 1 is a perspective view of the scraper device according to the first embodiment of the present invention. FIG. 2 is a sectional view of the scraper device of FIG. FIG. 3 is an explanatory diagram of a shape of a contact surface of a chuck member of the scraper device of FIG. FIG. 4 is an explanatory diagram of a method of inserting and fixing the scraper device to the tubular material or the tubular end of the joint member. FIG. 5 is an explanatory view of a method of shaving the outer peripheral surface of the tubular end by a scraper device fixed to the tubular end. FIG. 6 is an explanatory view of a method of removing the scraper device from the tubular end. FIG. 7 is an explanatory view of a fixed state of the scraper device with respect to a plurality of tubular ends having different pipe diameters. FIG. 8 is a schematic diagram illustrating the relationship between the connection state of the front link, the chuck member, and the rear link of the scraper device of the present embodiment, and the ease of rising. FIG. 9 is a schematic diagram illustrating a difference in holding force depending on the length of the front link and the rear link. FIG. 10 is an explanatory diagram illustrating the structure and operation of the chuck member and its peripheral members of the scraper device according to the second embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1 is a perspective view of a scraper device 1 according to the first embodiment of the present invention.
FIG. 2 is a sectional view of the scraper device 1 of FIG.
The scraper device 1 is a tool for shaving the outer peripheral surface of a tubular end portion of a resin pipe such as polyethylene or a joint member used as a gas pipe or a water pipe for electric fusion.

  A scraper device 1 shown in FIGS. 1 and 2 has a fixing portion 10 inserted and fixed in a tubular end portion, and is rotatably supported on the fixing portion 10 so as to be rotatable and can be pressed against the outer peripheral surface of the tubular end portion. A movable portion 20 having an arm 24 for holding the blade tip 2 to be obtained.

  Such a scraper device 1 spirally scrapes the outer peripheral surface of the tubular end portion by rotating and feeding the movable portion 20 manually or by a driving tool while the blade tip 2 is pressed against the outer peripheral surface of the tubular end portion. . It is desirable that the outer peripheral surface of the processed tubular end be as smooth as possible. If the outer peripheral surface of the tubular end after the shaving process has irregularities, the gap between the outer peripheral surface of the tubular end and the inner surface of the other tubular end will be uneven, and it will be difficult to achieve uniformity. In the case where the gap between the two tubular ends is not uniform as described above, even when the two tubular ends are fused and connected by electric current, unevenness in current distribution and melting are likely to occur, and a portion not fused with sufficient strength may occur. A portion that cannot have sufficient durability is likely to occur.

Further, the tubular end of the pipe or the joint member has a large inner diameter of several hundred mm and a small inner diameter of several tens mm. It is often required that a single work site be connected to a plurality of tubular ends of different tube diameters. In this case, it is not possible to say that the workability is good if the fixing portion 10 inserted and fixed to the tubular end portion is replaced for each pipe diameter.
As described above, in the scraper device 1, it is possible to perform a scraping operation on a plurality of tubular ends having different pipe diameters without replacing the fixing portion 10 inserted into and fixed to the tubular end for each pipe diameter. Is required.

  However, in the related art, it has been difficult to use the fixing portion 10 without replacing it for each tube diameter, for example, in a small tube diameter of 50 mm or less. That is, in the fixing portion 10 to be inserted into a large pipe diameter, a pantograph mechanism including a pair of long arms 24 intersecting with each other is adopted between the cylindrical fixing sleeve 11 and the chuck member 14, and the chuck member 14 is used. It can be moved far away from the sleeve. On the other hand, with a small pipe diameter of 50 mm or less, since the inside diameter for inserting the fixing portion 10 is small, it is difficult to secure a space for adopting the pantograph mechanism between the fixing sleeve 11 and the chuck member 14 by using a scraper device. Due to other specifications such as the strength required for No. 1, it was technically difficult.

  Therefore, in the present embodiment, a description will be given of the scraper device 1 in which the chuck member 14 can be moved so as to be largely separated from the sleeve in the fixing portion 10 inserted into a small pipe diameter. Thereby, the scraper device 1 of the present embodiment can be inserted and fixed to a plurality of pipe diameters including a small pipe diameter of, for example, 25 mm to 50 mm.

  The scraper device 1 shown in FIGS. 1 and 2 includes a fixed sleeve 11, a movable sleeve 12, a clamp knob 13, a plurality of chuck members 14, a plurality of front links 15, and a plurality of rear links 16 as the fixed portion 10.

  The scraper device 1 shown in FIGS. 1 and 2 has a chuck member 14, a front link 15, and a rear link 16 in three sets. The three chuck members 14 are provided outside the movable sleeve 12 at intervals of, for example, 120 degrees as shown in FIG. 3 described later. The number of the chuck member 14, the front link 15, and the rear link 16 may be two or four or more. However, considering that the scraper device 1 is used in a state in which the plurality of chuck members 14 are pressed against and fixed to the inner surface of the tubular end portion, it is desirable to provide three or more sets so as to be less likely to be displaced during the operation.

The fixed sleeve 11 has a long and substantially cylindrical shape.
The movable sleeve 12 has a substantially cylindrical shape with a larger diameter than the fixed sleeve 11.
The clamp knob 13 has a substantially cylindrical shape with a larger diameter than the movable sleeve 12.
The fixed sleeve 11 is inserted inside the movable sleeve 12 having a substantially cylindrical shape and inside the clamp knob 13 having a substantially cylindrical shape.
Threads that engage with each other are formed on the outer peripheral surface of the substantially cylindrical fixed sleeve 11 and the inner peripheral surface of the clamp knob 13. When the clamp knob 13 rotates on the outer peripheral surface of the fixed sleeve 11, the clamp knob 13 can move in the front-rear direction along the elongate direction in which the fixed sleeve 11 extends. When the clamp knob 13 moves in the longitudinal direction along the elongate direction in which the fixed sleeve 11 extends, the movable sleeve 12 accordingly moves in the longitudinal direction along the elongate direction in which the cylindrical fixed sleeve 11 extends. Can be moved to

FIG. 3 is an explanatory diagram of the shape of the contact surface 17 of the chuck member 14 of the scraper device 1 of FIG.
The chuck member 14 is a member pressed against the inner surface of the tubular end 50. FIG. 3A shows a state in which the plurality of chuck members 14 are pressed against the smallest inner diameter of the plurality of tubular ends 50 to be inserted. FIG. 3B shows a state in which the plurality of chuck members 14 are pressed against the largest inner diameter of the plurality of tubular ends 50 to be inserted.

As shown in FIGS. 1 and 2, the chuck member 14 is a plate-like member having a long contact surface 17 in the extending direction of the fixed sleeve 11. The contact surface 17 may be formed on a rough surface roughened by a plurality of protrusions.
The contact surface 17 of the chuck member 14 is curved along the smallest inner diameter of the plurality of tubular ends 50 to be inserted as shown in FIG. The minimum inner diameter in the present embodiment is 25 mm.

  In this case, as shown in FIG. 3B, the contact surface 17 of the chuck member 14 is such that, at the tubular end 50 having an inner diameter other than the minimum, both end portions of the contact surface 17 rise from the inner surface of the tubular end 50. become. The contact width between the chuck member 14 and the tubular end 50 is reduced. This tendency becomes conspicuous at a tube diameter of 50 mm which is the largest when trying to cope with a plurality of tube diameters that are different by half, such as 25 mm and 50 mm. When the contact width between the chuck member 14 and the tubular end portion 50 becomes smaller, even if the chuck member 14 is strongly pressed against the tubular end portion 50, the chuck member 14 is firmly held so as not to be displaced with respect to the tubular end portion 50. It becomes difficult to fix.

  As shown in FIGS. 1 and 2, the chuck member 14 that is long in the extending direction of the fixed sleeve 11 has a positioning rib portion 18 protruding outward from the contact surface 17 from a trailing edge portion.

  The front link 15 is a substantially L-shaped link member. The front end of the substantially L-shaped short side portion of the front link 15 is movably connected to the front end portion of the fixed sleeve 11. The front end of the substantially L-shaped long side portion of the front link 15 is movably connected to the front end portion of the chuck member 14. Thereby, the front link 15 movably connects the fixed sleeve 11 and the front end of the chuck member 14.

  The rear link 16 is a substantially I-shaped link member. The front end of the substantially I-shaped rear link 16 is movably connected to the rear end portion of the chuck member 14. The rear end of the substantially I-shaped rear link 16 is movably connected to the movable sleeve 12. Thereby, the rear link 16 movably connects the rear end of the chuck member 14 and the movable sleeve 12.

  Since the front link 15 is formed in a substantially L-shape, as shown in FIG. 2, the substantially L-shaped long side portion of the front link 15, the chuck member 14, and the rear link 16 are They can be arranged along the outer peripheral surface of the fixed sleeve 11 so as not to form a gap between the outer peripheral surface of the cylindrical fixed sleeve 11. By folding the plurality of chuck members 14 into contact with the outer peripheral surface of the fixed sleeve 11, the outer diameter of the plurality of chuck members 14 due to the contact surface 17 is minimized before being inserted into the tubular end 50. It becomes possible.

  The scraper device 1 shown in FIGS. 1 and 2 has a shaft 21, a clamp handle 22, a body 23, and an arm 24 as the movable part 20.

The shaft 21 has a substantially cylindrical shape longer than the fixed sleeve 11.
The front half of the substantially cylindrical shaft 21 is inserted inside the substantially cylindrical fixed sleeve 11.
Threads that engage with each other are formed on the inner peripheral surface of the substantially cylindrical fixed sleeve 11 and the outer peripheral surface of the front half of the shaft 21. When the shaft 21 rotates inside the fixed sleeve 11, the shaft 21 can move in the front-rear direction along the elongate direction in which the fixed sleeve 11 extends.

An engagement pin 25 protrudes from the rear half of the substantially cylindrical shaft 21.
At the rear end portion of the substantially cylindrical shaft 21 on the rear side of the engagement pin 25, a screw thread that engages with the screw thread of the clamp handle 22 is formed.
A chuck portion 26 to which a rotation driving tool is attached is formed at a rear end portion of the substantially cylindrical shaft 21 behind the thread.

The body 23 is a substantially rectangular member.
An elongated hole 27 is formed at one end of the substantially rectangular body 23 along the longitudinal direction of the rectangular body. The substantially cylindrical shaft 21 is inserted into the long hole 27. The front half portion and the rear end portion of the shaft 21 project to both sides of the body 23.

A plurality of concave grooves 28 are formed in the substantially rectangular body 23 along the edge of the elongated hole 27. The engaging pin 25 protruding from the substantially cylindrical shaft 21 enters the concave groove 28. The plurality of concave grooves 28 are formed at positions corresponding to each of a plurality of target pipe diameters. In order to comply with two types of standards, the plurality of concave grooves 28 may be formed along the pair of edges of the elongated hole 27 for each standard.
In a state where the shaft 21 is inserted into the elongated hole 27 of the body 23 so that the engagement pin 25 is engaged with the one concave groove 28, the clamp handle 22 is attached from the rear side of the shaft 21 so that the shaft 21 and the body 23 And can be integrated. The shaft 21 is attached to the body 23 so as not to rotate within the body 23.

A fixed wall portion 29 is formed so as to protrude from a surface on the other end side of the substantially rectangular body 23.
The fixed wall portion 29 extends along the direction in which the elongated hole 27 is formed on the surface on the other end side of the substantially rectangular body 23.

The arm 24 has a substantially rod shape that is long in the front-rear direction.
The arm 24 is attached to the fixed wall portion 29 of the body 23 at a position near the center of the rear half portion.
The arm 24 is attached to a fixed wall portion 29 of the body 23 so as to be rotatable around an axis substantially perpendicular to the longitudinal direction of the substantially plate-shaped body 23 and the longitudinal direction of the shaft 21.
The arm 24 extends forward from the body 23 so as to extend along the shaft 21 and the cylindrical fixed sleeve 11.
At the front end of the arm 24, the blade tip 2 for shaving the outer peripheral surface of the tubular end portion 50 is exchangeably attached. The blade tip 2 is attached at the front end of the arm 24 so as to protrude toward the shaft 21 beyond the arm 24.
By rotating the arm 24 with respect to the body 23, the blade tip 2 is movable so as to swing in a direction in which the blade tip 2 comes into contact with and separates from the shaft 21 extending substantially parallel to the arm 24.

  An accommodation hole 30 for accommodating a spring 31 is formed in a surface of the rear end of the arm 24 facing the body 23 and a surface of the body 23 on the other end side adjacent to the fixed wall portion 29. The spring 31 is accommodated in the accommodation hole 30 in a state where the spring 31 is compressed from its natural length. The arm 24 rotatably attached to the body 23 is brought into a state in which the blade tip 2 is closest to the shaft 21 by the urging force of the spring spring 31.

At the rear end of the arm 24 attached to the fixed wall portion 29 of the body 23 and the fixed wall portion 29 of the body 23 adjacent to the arm 24, cylindrical cam holes 32 and 33 penetrating therethrough are formed. You.
The cam hole 32 of the arm 24 has a larger diameter than the cam hole 33 of the fixed wall 29 of the body 23.
A cam member 34 is rotatably inserted into the cam hole 33 of the fixed wall portion 29 of the body 23.

The cam member 34 includes a cam shaft 35 coaxially inserted into the cam hole 33 of the fixed wall portion 29, an eccentric cam portion 36 provided on the side of the arm 24 protruding from the cam hole 32 with respect to the cam shaft 35, And a retract knob 37 provided at a portion protruding from the arm 24 with respect to the arm 24.
The eccentric cam portion 36 is formed in a disk shape having a larger diameter than the cam hole 33 of the fixed wall portion 29. The center of the disk-shaped eccentric cam portion 36 is shifted from the center of the cam shaft 35. Thus, when the cam shaft 35 rotates, the position of the eccentric cam portion 36 inside the cam hole 32 of the arm 24 changes.

By rotating the cam member 34 in one direction by using the retract knob 37, the eccentric cam portion 36 is fixed so as to press the rear end portion of the arm 24 against the body 23 against the urging force of the spring spring 31. be able to. Thereby, the arm 24 can be held in the retracted state where the blade tip 2 is farthest from the shaft 21.
By rotating the cam member 34 in the other direction from the holding state, the eccentric cam portion 36 is separated from the cam hole 32 of the arm 24. The arm 24 can freely swing.

Next, a method of shaving the outer peripheral surface of the tubular end portion 50 using the scraper device 1 of FIGS. 1 to 3 will be described.
When scraping the outer peripheral surface of the tubular end 50, the scraper device 1 is fixed to the tubular end 50, is scraped from the outer peripheral surface, and is removed from the tubular end 50 after the outer peripheral surface is cut.

  FIG. 4 is an explanatory view of a method of inserting and fixing the scraper device 1 to the tubular end 50 of the pipe or the joint member.

  When fixing the scraper device 1 to the tubular end portion 50, the user holds the plurality of chuck members 14 of the fixing portion 10 of the scraper device 1 along the outer peripheral surface of the fixing sleeve 11, as shown in FIG. In the folded state, it is inserted inside the tubular end 50.

Then, as shown in FIG. 4B, the user turns the clamp knob 13 in one direction. Accordingly, the movable sleeve 12 is pushed forward by the clamp knob 13 and moves forward along the fixed sleeve 11. When the movable sleeve 12 moves forward, the front link 15 stands, and then the rear link 16 stands. With the front link 15 and the rear link 16 both standing with respect to the fixed sleeve 11, the plurality of chuck members 14 are separated from the fixed sleeve 11. The plurality of chuck members 14 begin to spread around the fixed sleeve 11.
When the clamp knob 13 is further turned in one direction, the contact surfaces 17 of the plurality of chuck members 14 that spread accordingly hit the inner surface of the tubular end 50.

  Then, as shown in FIG. 4C, when the clamp knob 13 is turned in one direction in a state where the positioning ribs 18 of the plurality of chuck members 14 are applied to the end surface of the tubular end 50, a plurality of The contact surface 17 of the chuck member 14 is pressed against the inner surface of the tubular end 50. The clamp knob 13 holds the plurality of chuck members 14 in contact with the inner surface of the tubular end 50. Thereby, the fixing part 10 of the scraper device 1 is fixed to the tubular end part 50. The fixing sleeve 11 is positioned and fixed so as to extend along the axial direction of the tubular end 50 while being inserted into the tubular end 50.

  After fixing the fixing portion 10 of the scraper device 1 to the tubular end portion 50, the user operates the clamp handle 22 of the movable portion 20 after confirming that the arm 24 is in the retracted state. Thereby, the shaft 21 moves forward while rotating in one direction inside the fixed sleeve 11. Thereby, the blade tip 2 attached to the front end of the arm 24 approaches the end face of the tubular end 50.

  Thereafter, as shown in FIG. 4 (D), the retraction knob 37 is rotated in the other direction to bring the blade tip 2 into contact with the outer peripheral surface of the tubular end portion 50. At this time, the step of the blade tip 2 is aligned with the end face of the tubular end 50.

  FIG. 5 is an explanatory diagram of a method of shaving the outer peripheral surface of the tubular end 50 by the scraper device 1 fixed to the tubular end 50.

  When the outer peripheral surface of the tubular end 50 is shaved, the shaft 21 is rotated in one direction while the step of the blade tip 2 is aligned with the end surface of the tubular end 50 as shown in FIG. The shaft 21 may be manually rotated by the clamp knob 13 or may be rotated by a rotation driving tool attached to the chuck portion 26.

  The shaft 21 rotating in one direction moves forward while rotating. Accordingly, the blade tip 2 attached to the tip of the movable portion 20 and the arm 24 also moves forward while rotating on the outer peripheral surface of the tubular end portion 50. The blade tip 2 pressed against the outer peripheral surface of the tubular end portion 50 by the urging force of the spring spring 31 moves forward while rotating, so that the outer peripheral surface of the tubular end portion 50 reaches the height of the step of the blade tip 2. It can be cut at a corresponding depth.

  Then, as shown in FIG. 5 (B), when the area required for welding to the other tubular end 50 has been cut, the rotation of the shaft 21 is stopped.

  FIG. 6 is an explanatory diagram of a method of removing the scraper device 1 from the tubular end portion 50.

  When removing the scraper device 1 from the tubular end portion 50, as shown in FIG. 6A, first, the scraper device 1 is rotated in one direction of the retract knob 37 in FIG. The eccentric cam portion 36 of the cam member 34 is rotated by the retract knob 37 to lift and hold the front end of the arm 24 against the urging force of the spring 31. The blade tip 2 after scraping is held in a retracted state away from the outer peripheral surface of the tubular end 50 by a simple operation.

  Next, the clamp knob 13 is slightly rotated in the other direction. As a result, the clamp knob 13 moves rearward while rotating around the fixed sleeve 11. When the clamp knob 13 retreats, the movable sleeve 12 is no longer pressed by the clamp knob 13, and the movable sleeve 12 can move rearward. The plurality of chuck members 14 pressed against the inner surface of the tubular end 50 can be separated from the inner surface of the tubular end 50.

  Then, for example, as shown in FIG. 6B, with the plurality of chuck members 14 separated from the inner surface of the tubular end 50, the entire fixing portion 10 such as the fixing sleeve 11 of the scraper device 1 is removed from the tubular end 50. Pull out.

Thereby, as shown in FIG. 6 (C), the scraper device 1 which has completed the operation can be removed from the tubular end portion 50.
When the fixing portion 10 of the scraper device 1 is pulled out from the tubular end portion 50, the scraper device 1 that has completed the work can be removed from the tubular end portion 50 so that the blade tip 2 does not hit the shaved outer peripheral surface.
In this manner, the outer peripheral surface of the tubular end 50 can be substantially uniformly ground so as to be entirely smooth within a predetermined range from the end of the tubular end 50.

FIG. 7 is an explanatory view of a state in which the scraper device 1 is fixed to a plurality of tubular ends 50 having different pipe diameters.
In FIG. 7A, the fixing portion 10 of the scraper device 1 is inserted into and fixed to the tubular end portion 50 having a small inner diameter (φ1).
In FIG. 7B, the fixing portion 10 of the scraper device 1 is inserted into and fixed to the tubular end portion 50 having a large inner diameter (φ2> φ1).

As shown in FIGS. 7A and 7B, the fixing portion 10 of the present embodiment adjusts the degree of spread of the plurality of chuck members 14 from the fixing sleeve 11 so that the inner diameter (φ1 2) to the tubular end 50 having a large inner diameter (φ2> φ1).
In the scraper device 1 of the present embodiment, the fixing portion 10 is inserted into and fixed to the plurality of tubular ends 50 having different tube diameters, and the outer peripheral surfaces of the plurality of tubular ends 50 having different tube diameters can be shaved. it can.
The scraper device 1 can be used to scrape the outer peripheral surfaces of a plurality of tubular ends 50 having different tube diameters, for example, from a tubular end 50 having a tube diameter of 25 mm to a tubular end 50 having a tube diameter of 50 mm.

Although not specifically shown, in the case of FIG. 7A and the case of FIG. 7B, the engagement pin 25 of the movable portion 20 has a plurality of recesses according to the diameter of the tubular end portion 50. The groove 28 is engaged with a different groove 28.
The engagement pin 25 in the case of FIG. 7A is engaged with the concave groove 28 formed at a position closer to the arm 24 as compared with the case of FIG. 7B.

  Next, the function and operation of the fixing unit 10 of the scraper device 1 of the present embodiment will be described in comparison with a modification.

FIG. 8 is a schematic diagram illustrating the relationship between the connection state of the front link 15, the chuck member 14, and the rear link 16 of the scraper device 1 of the present embodiment, and the ease of rising.
In FIG. 8, for easy understanding, the front link 15 is schematically illustrated as being formed not in an L-shape but in an I-shape similar to the rear link 16.
The chuck member 14 is schematically illustrated as a flat linear plate.

In the modification shown in FIG. 8A, the front link 15, the chuck member 14, and the rear link 16 are folded along the outer peripheral surface of the fixed sleeve 11 in a straight line.
A connecting portion 41 between the fixed sleeve 11 and the front link 15, a connecting portion 42 between the front link 15 and the chuck member 14, a connecting portion 43 between the chuck member 14 and the rear link 16, a rear link 16 and the movable sleeve The connecting portion 44 with the 12 is aligned in a straight line along the outer peripheral surface of the fixed sleeve 11.
The connecting portions 41 to 44 of the plurality of members are aligned in a straight line.
In this case, even if the clamp knob 13 is rotated in one direction to move the movable sleeve 12 forward, the force causes the front link 15, the chuck member 14, or the rear link 16 to rise from the outer peripheral surface of the fixed sleeve 11. hard.
The front link 15, the chuck member 14, and the rear link 16, in which the connecting portions 41 to 44 are arranged in a straight line, function to inhibit the movable sleeve 12 from moving forward.

On the other hand, in FIG. 8B corresponding to the present embodiment, the front link 15 at the front end portion of the fixed sleeve 11 is larger than the outer peripheral surface (outer diameter) of the cylindrical fixed sleeve 11. At a position close to the central axis, it is connected to the fixed sleeve 11.
The connecting portion 41 of the front link 15 with the fixing sleeve 11 is connected at a position closer to the center axis of the cylindrical fixing sleeve 11 than the connecting portion 42 of the front link 15 with the chuck member 14. You.
In this case, the force for rotating the clamp knob 13 in one direction to move the movable sleeve 12 forward is applied through the rear link 16 and the chuck member 14 aligned in a straight line along the outer peripheral surface of the fixed sleeve 11. , Acting on the connecting portion 42 of the front link 15 with the chuck member 14. Part of the force acting on the front link 15 acts to raise the front link 15 forward as indicated by the arrow vector in FIG. 8B.
Therefore, the front link 15, the chuck member 14, and the rear link 16 do not prevent the movable sleeve 12 from moving forward.
When the movable sleeve 12 is moved forward by rotating the clamp knob 13 in one direction, the front link 15 is immediately raised by a slight force, and then the rear link 16 is raised, and the chuck member 14 is moved from the outer peripheral surface of the fixed sleeve 11. Get away.

In FIG. 8C as a modified example of the present embodiment, the rear link 16 is configured such that the connecting portion 44 with the movable sleeve 12 is larger than the outer peripheral surface (outer diameter) of the cylindrical fixed sleeve 11. It is located near the central axis of.
Even in such a modification, when the clamp knob 13 is rotated in one direction to move the movable sleeve 12 forward, the rear link 16 rises immediately with a slight force, and then the front link 15 rises, and the chuck The member 14 is separated from the outer peripheral surface of the fixed sleeve 11.

However, in the case of the modification shown in FIG. 8C, the inner diameter of the movable sleeve 12 needs to be small in order to provide the connecting portion 44 with the rear link 16.
As a result, the fixed sleeve 11 inserted inside the movable sleeve 12 and the shaft 21 inside the fixed sleeve 11 have to be reduced in diameter.
When the shaft 21 becomes thinner in this manner, even if the fixing portion 10 can be firmly fixed by inserting the fixing portion 10 into the tubular end portion 50, the movable portion 20 and the blade tip 2 can be removed while the outer peripheral surface of the tubular end portion 50 is being shaved. Is more likely to fluctuate.
In order to suppress such fluctuations during the operation, it is necessary to form the shaft 21 to have the same diameter as that of the present embodiment. However, if the shaft 21 is formed so as to obtain strength in the modification of FIG.
The diameter of the fixed sleeve 11 must be increased so that the connecting portion 44 between the movable sleeve 12 and the rear link 16 is closer to the central axis of the fixed sleeve 11 than the other connecting portions 41 to 43. In this case, the outer diameter of the plurality of folded chuck members 14 also increases. The fixing portion 10 of the scraper device 1 cannot be inserted into the small-diameter tubular end portion 50.
For these reasons, the example of this embodiment in FIG. 8B is the most preferable in FIGS. 8A to 8C.

FIG. 9 is a schematic diagram illustrating a difference in holding force depending on the length of the front link 15 and the rear link 16.
In FIG. 9, for easy understanding, the front link 15 is schematically illustrated as being formed in an I-shape similar to the rear link 16 instead of the L-shape as in FIG. 8.

FIG. 9A is a modification of the present embodiment. In FIG. 9A, the front link 15 and the rear link 16 are formed to have the same length (L1 = L2).
In this case, the angle at which the front link 15 rises with respect to the fixed sleeve 11 (90 degrees-θ1) in a state where the outer peripheral surface of the chuck member 14 is pressed against the inner surface of the tubular end portion 50 is determined by setting the rear link 16 to the fixed sleeve. It becomes larger than the angle (90 degrees−θ2) which stands with respect to 11.
The force by which the front link 15 presses the front end of the chuck member 14 against the inner surface of the tubular end 50 is greater than the force by which the rear link 16 presses the front end of the chuck member 14 against the inner surface of the tubular end 50. Become.
As a result, the chuck member 14 is pressed against the inner surface of the tubular end 50 with different forces in the front-rear direction. As a result, the chuck member 14 may be pressed against the inner surface of the tubular end 50 even if the entire chuck member 14 is pressed against the inner surface of the tubular end 50 by a force greater than that required for normal holding. It becomes easy to slip.

FIG. 9B corresponds to the present embodiment. In FIG. 9B, the front link 15 is formed longer (L1> L2) than the rear link 16.
In this case, the angle at which the front link 15 rises with respect to the fixed sleeve 11 (90 degrees-θ1) in a state where the outer peripheral surface of the chuck member 14 is pressed against the inner surface of the tubular end portion 50 is determined by setting the rear link 16 to the fixed sleeve. The angle (90 ° −θ2) which stands with respect to 11 is substantially the same.
The component force of the front link 15 pressing the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50 is substantially equal to the component force of the rear link 16 pressing the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50. Will be the same.
As a result, the chuck member 14 is pressed against the inner surface of the tubular end 50 with a substantially uniform force in the front-rear direction. The chuck member 14 is pressed against the inner surface of the tubular end 50 by an appropriate and not excessively large force required for holding, and is easily shifted with respect to the inner surface of the tubular end 50.
In particular, as shown in FIG. 3B, when both widthwise end portions of the contact surface 17 of the chuck member 14 rise from the inner surface of the tubular end portion 50, the chuck member 14 moves to the center of the contact surface 17 in the width direction. Only that portion will press against the inner surface of the tubular end 50.
In the case of FIG. 9 (B), even in such a partially pressed state, the chuck member 14 is pressed against the inner surface of the tubular end portion 50 with a substantially uniform force in the front-rear direction, and the tubular end portion 50 is pressed. Is firmly fixed to the inner surface of the tubular end 50, and is less likely to be shifted with respect to the inner surface of the tubular end portion 50.

  As described above, in the present embodiment, the movable sleeve 12 is moved along the axial direction of the cylindrical fixed sleeve 11 by the holding mechanism using the screw fitting of the fixed sleeve 11 and the movable sleeve 12 and the clamp knob 13. Accordingly, the front link 15 and the rear link 16 push up the chuck member 14 so as to be separated from the fixed sleeve 11 while sandwiching the chuck member 14 from both sides. Therefore, in the present embodiment, there is no need to provide a pantograph mechanism or an elastic member for pushing up the chuck member 14 from the fixed sleeve 11 between the chuck member 14 and the fixed sleeve 11. As a result, in the present embodiment, the virtual minimum diameter of the plurality of chuck members 14 of the fixing portion 10 in a state where the plurality of chuck members 14 are in contact with the periphery of the fixing sleeve 11 is reduced to the necessary minimum. Can be smaller. The fixing portion 10 of the present embodiment can be inserted into and fixed to the tubular end portion 50 having a small tube diameter of, for example, about 25 mm.

  Further, in the fixing portion 10 inserted and fixed to the tubular end portion 50, the plurality of chuck members 14 are separated from the fixing sleeve 11 so as to be sandwiched by a plurality of sets of the front link 15 and the rear link 16, and It presses against the inner surface of the part 50. Thereby, the fixing part 10 is fixed to the tubular end part 50. Therefore, the fixing portion 10 of the present embodiment can be suitably inserted and fixed to the tubular ends 50 of a plurality of pipes or joint members having different inner diameters, including a tube or joint member having a small inner diameter. . The scraper device 1 can be used for shaving the outer peripheral surfaces of a plurality of tubular ends 50 having different pipe diameters without replacing the fixing portion 10 for each pipe diameter. In the scraper device 1 of the present embodiment, for example, a plurality of small-diameter tubular ends 50 having a diameter of 50 mm to 25 mm can be used without replacing the fixing portion 10 for each pipe diameter.

  In the present embodiment, the front link 15 and the fixed sleeve 11 are connected at a front end portion of the fixed sleeve 11 at a position closer to the center axis of the fixed sleeve 11 than the outer diameter of the cylindrical fixed sleeve 11. You. As a result, the connection portion 41 of the front link 15 with the fixed sleeve 11 is located closer to the central axis of the cylindrical fixed sleeve 11 than the connection portion 42 with the chuck member 14. The connecting portion 41 between the front link 15 and the fixed sleeve 11 is the most cylindrical among the connecting portions 41 to 44 of the fixed sleeve 11, the front link 15, the chuck member 14, the rear link 16, and the movable sleeve 12. Is located near the central axis of the fixing sleeve 11. By setting the plurality of connection portions 41 to 44 in an unbalanced connection state that is not linear, the movable sleeve 12 can be moved along the axial direction of the cylindrical fixed sleeve 11 by the clamp knob 13. The front link 15 can easily stand up with respect to the fixed sleeve 11. The front link 15, the chuck member 14 and the rear link 16 arranged along the outer peripheral surface of the cylindrical fixed sleeve 11 prevent the movable sleeve 12 from moving along the axial direction of the cylindrical fixed sleeve 11. It becomes difficult to function. The front link 15 moves so as to rise up smoothly with a small force by the clamp knob 13, and separates the chuck member 14 from the fixed sleeve 11. Further, the movable sleeve 12 can smoothly move along the axial direction of the cylindrical fixed sleeve 11 without stress.

  In the present embodiment, at the front end of the fixed sleeve 11, the front link 15 connected to the fixed sleeve 11 at a position closer to the center axis than the outer diameter of the cylindrical fixed sleeve 11 is longer than the rear link 16. Formed into a scale. Accordingly, in a state where the plurality of chuck members 14 are in contact with the inner surface of the tubular end portion 50, the front link 15 and the rear link 16 stand at substantially the same angle with respect to the chuck members 14. The front link 15 and the rear link 16 can stand at substantially the same angle with respect to the chuck member 14 in a fixed state, for example, as compared with the case where they are formed to the same length. As a result, both end portions of the chuck member 14 in the front-rear direction are pressed against the inner surface of the tubular end portion 50 by substantially the same force. The chuck member 14 comes to press against the inner surface of the tubular end portion 50 with a substantially uniform pressure over the entire length thereof. The chuck member 14 can be suitably secured to the tubular end 50 with a high retention force that makes it less likely that the chuck member 14 will shift during operation.

  Moreover, when the same chuck member 14 is used for a plurality of small-diameter tubular ends 50 as in the present embodiment, the contact surface 17 of the chuck member 14 is curved along the minimum inner diameter and becomes planar. It is formed to be in contact. In this case, it becomes difficult for the chuck member 14 to hit the inner diameter which is not the minimum, and it tends to hit the linear shape in an extreme case. In this case, the holding force of the fixing portion 10 by the chuck member 14 may be reduced. However, in the present embodiment, the chuck member 14 is pressed against the inner surface of the tubular end 50 with a substantially uniform pressure over the entire length thereof. Therefore, in the present embodiment, even if the chuck member 14 can only hit the tubular end portion 50 of the pipe member or the joint member having a minimum inner diameter only in a linear manner, the chuck member 14 extends in the front-rear direction. Due to the high holding force in the entire lengthwise direction, it is possible to suitably fix so that it is unlikely to be displaced during the work.

  In the present embodiment, the eccentric cam portion 36 of the cam member 34 is rotatably provided on the body 23 in the movable portion 20 that holds the blade tip 2 and is rotatably supported on the fixed portion 10 so as to be rotatable. . The eccentric cam portion 36 of the cam member 34 holds the arm 24 such that the blade tip 2 is separated from the outer periphery of the tubular end portion 50 against the urging force of the urging member by being rotated. Therefore, by operating the separating member after the shaving process on the outer peripheral surface of the tubular end portion 50 is completed, the blade tip 2 can be maintained in a state separated from the outer peripheral surface after the shaving process. By removing the scraper device 1 from the tubular end portion 50 in this state, the scraper device 1 can be removed from the tubular end portion 50 without damaging the outer peripheral surface after the shaving process with the blade tip 2.

[Second embodiment]
Next, a scraper device 1 according to a second embodiment of the present invention will be described.
In the present embodiment, the chuck member 14 is improved so as to easily start rising.

FIG. 10 is an explanatory diagram of the structure and operation of the chuck member 14 and its peripheral members of the scraper device 1 according to the second embodiment of the present invention.
As shown in FIG. 10A, the chuck member 14 of the scraper device 1 according to the second embodiment has a convex portion 51.
The convex portion 51 protrudes inward from the inner surface of the chuck member 14 on the side in contact with the fixed sleeve 11 toward the fixed sleeve 11.
In the present embodiment, the convex portion 51 is provided on a rear portion of the inner surface of the chuck member 14.
The protrusion 51 may be configured by inserting a screw body into a screw hole formed on the inner surface of the chuck member 14, for example. In this case, by rotating the protrusion 51, the amount of protrusion of the protrusion 51 from the inner surface of the chuck member 14 can be finely adjusted.
In addition, for example, the convex portion 51 may be formed by a member formed integrally with the chuck member 14 so as to protrude from the inner surface of the chuck member 14.

FIG. 10B is a diagram schematically illustrating the attitude of the chuck member 14 in FIG.
As shown in FIG. 10B, when the chuck member 14 of the scraper device 1 according to the second embodiment is folded so as to be in contact with the outer peripheral surface of the fixed sleeve 11, the convex portion 51 has the outer periphery of the fixed sleeve 11. Hit the surface.
The chuck member 14 has a posture inclined with respect to the longitudinal direction of the fixed sleeve 11 such that the front side is in contact with the fixed sleeve 11 and the rear side is separated from the fixed sleeve 11.
In this case, when the movable sleeve 12 moves forward by rotating the clamp knob 13, the rear link 16 reliably pushes up the rear side of the chuck member 14 at the connection portion 44.
Therefore, as shown by the arrow with a circle in FIG. 10B, the entire chuck member 14 smoothly separates from the fixed sleeve 11.
As a result, in the present embodiment, when the movable sleeve 12 starts to move forward, the front link 15 rotates forward about the connecting portion 41 and starts to rise, and the entire chuck member 14 starts to separate from the fixed sleeve 11. Become like
Thereafter, the front link 15 and the rear link 16 can reliably push up the chuck member 14 that has begun to smoothly move away from the fixed sleeve 11 at the timing when the movable sleeve 12 starts to move forward.
The front link 15, the chuck member 14, and the rear link 16 are less likely to be clogged so as to prevent the movable sleeve 12 from moving forward.
It is possible to substantially surely prevent the chuck member 14 from being manufactured such that it is difficult for the plurality of scraper devices 1 to separate from the fixed sleeve 11 due to manufacturing variations or the like.

On the other hand, for example, in the comparative example of FIG. 10C, the rear part of the chuck member 14 is lower than the front part in a state where the fixed member 11 is folded so as to be in contact with the outer peripheral surface. In this case, when the movable sleeve 12 starts to move forward, as shown by a crossed arrow in the drawing, the rear link 16 presses the rear side of the chuck member 14 at the connecting portion 44 against the fixed sleeve 11. As a result, it becomes difficult for the rear link 16 to push up the rear side of the chuck member 14. It is difficult for the chuck member 14 to start moving away from the fixed sleeve 11 smoothly. Then, the movable sleeve 12 cannot move forward any further. The movable sleeve 12 gets clogged.
In the present embodiment, it is possible to almost certainly prevent such a situation from occurring.

  The above embodiment is an example of a preferred embodiment of the present invention, but the present embodiment is not limited to this, and various modifications or changes can be made without departing from the gist of the invention. .

For example, in the above embodiment, the movable sleeve 12 is moved and held along the extending direction of the cylindrical fixed sleeve 11 using the clamp knob 13.
In addition to this, for example, using a ratchet mechanism that holds the clamp knob 13 or the movable sleeve 12 at a plurality of positions in the extending direction of the fixed sleeve 11, the plurality of chuck members 14 are brought into contact with the inner surface of the tubular end 50. The movable sleeve 12 may be held.

In the above embodiment, the outer peripheral surface of the fixed sleeve 11 and the inner peripheral surface of the clamp knob 13 are formed with threads that engage with each other over their entire circumferences.
In addition to these, for example, these screw threads may be formed in a range that is equal to or less than, for example, a half circumference of each outer peripheral surface.
Even in the case of forming a half-nut-like thread, a plurality of chuck members are formed by engaging the thread on the outer peripheral surface of the fixed sleeve 11 with the thread on the inner peripheral surface of the clamp knob 13. The movable sleeve 12 can be held at a position where the 14 hits the inner surface of the tubular end 50.
In addition, by rotating the clamp knob 13 by half a turn from that state, the engagement between these threads can be released. The clamp knob 13 that has been disengaged from the fixing sleeve 11 can be slid so as to be pulled all at once to the rear along the extending direction of the fixing sleeve 11.

DESCRIPTION OF SYMBOLS 1 ... Scraper device 2 ... Blade tip 10 ... Fixed part 11 ... Fixed sleeve 12 ... Movable sleeve 13 ... Clamp knob 14 ... Chuck member 15 ... Front link 16 ... Rear link 17 ... Contact surface 18 ... Rib part 20 ... Movable part 21 ... Shaft 22 Clamp handle 23 Body 24 Arm 25 Engagement pin 26 Chuck 27 Slot 28 Depressed groove 29 Fixed wall 30 Housing hole 31 Spring spring 32 Cam hole 33 Cam hole 34 ... Cam member 35 ... Cam shaft 36 ... Eccentric cam portion 37 ... Retract knob 41 ... Connecting portion 42 ... Connecting portion 43 ... Connecting portion 44 ... Connecting portion 50 ... Tube end 51 ... Convex portion

Preferably, a shaft inserted into the cylindrical fixing sleeve, a body to which the shaft is attached, and the blade tip attached to a tip portion, extending from the body along the cylindrical fixing sleeve. An arm to which the blade tip is swingably attached to the body so as to swing toward and away from the outer periphery of the tubular end; and An urging member for urging the blade tip, and a separation member provided on the body for holding the arm such that the blade tip is separated from the outer periphery of the tubular end portion against the urging force of the urging member. And a member.
Further, another scraper device according to the present invention is characterized in that the tubular end portion is formed by applying a blade tip to an outer peripheral surface of a tubular end portion of a resin pipe or a joint member and rotating the tubular end portion around an axis of the tubular end portion. A scraper device for spirally shaving the outer peripheral surface of the scraper, comprising a cylindrical fixing sleeve, a fixing portion inserted into and fixed to the tubular end portion, and rotatably inserted into the cylindrical fixing sleeve. Shaft, the body to which the shaft is attached, and the blade tip is attached to the tip portion, extends along the tubular fixed sleeve from the body, and the blade tip is An arm that is swingably mounted in a direction to come into contact with and separate from an outer periphery of the tubular end; and a force that urges the arm toward the outer periphery of the tubular end with respect to the arm. An urging member, and a separating member provided on the body and holding the arm so that the blade tip is separated from the outer periphery of the tubular end portion against the urging force of the urging member. It may be.
Preferably, the separation member has an eccentric cam portion rotatably provided on the body, and the blade tip is rotated against the biasing force of the biasing member by rotating the eccentric cam portion. Preferably, the front end of the arm is lifted and held so as to be spaced from the outer periphery of the tubular end.

Claims (8)

A scraper device for spirally shaving the outer peripheral surface of the tubular end by applying a blade tip to the outer peripheral surface of the tubular end of a resin-made pipe or joint member and rotating the outer peripheral surface of the tubular end around a shaft thereof. hand,
In order to pivotally support the blade tip so as to be rotatable around the axis of the tubular end, a fixing portion inserted and fixed to the tubular end,
A tubular fixing sleeve disposed along the axial direction of the tubular end while being inserted into the tubular end;
A movable sleeve movable on an outer periphery of the cylindrical fixed sleeve in an extending direction of the fixed sleeve,
A plurality of chuck members abutting the inner surface of the tubular end,
A plurality of first links movably connecting the fixed sleeve and one end of each of the chuck members,
A plurality of second links movably connecting the other end of each of the chuck members and the movable sleeve,
A holding mechanism that moves the movable sleeve along the direction in which the cylindrical fixed sleeve extends, and holds the plurality of chuck members in a state where the chuck members abut against the inner surface of the tubular end;
Having,
Scraper device.
The first link and the fixed sleeve,
At the front end portion of the fixed sleeve, the outer diameter of the cylindrical fixed sleeve is connected at a position closer to the central axis of the cylindrical fixed sleeve,
The scraper device according to claim 1.
Regarding the first link,
The connecting portion with the fixing sleeve is connected at a position closer to the central axis of the cylindrical fixing sleeve than the connecting portion with the chuck member.
The scraper device according to claim 1.
A connecting portion between the first link and the fixing sleeve,
Of the connecting portion of the fixing sleeve, the first link, the chuck member, and the second link, located closest to the central axis of the cylindrical fixing sleeve,
The scraper device according to claim 1.
The first link is formed longer than the second link,
The scraper device according to claim 1.
The chuck member has a contact surface curved along a minimum inner diameter for a tubular end of a plurality of tubing or coupling members having different inner diameters.
The scraper device according to claim 5.
The chuck member has a convex portion protruding toward the fixed sleeve on a surface on a side in contact with the fixed sleeve,
The scraper device according to claim 1.
A shaft inserted into the cylindrical fixed sleeve,
A body to which the shaft is attached;
The blade tip is attached to a tip portion and extends from the body along the cylindrical fixed sleeve, in a direction in which the blade tip comes into contact with and separates from the outer periphery of the tubular end with respect to the body. An arm that is swingably mounted,
An urging member for urging the arm to direct the blade tip toward the outer periphery of the tubular end portion,
A separating member provided on the body, for holding the arm so that the blade tip is separated from the outer periphery of the tubular end portion against a biasing force of the biasing member;
Having,
The scraper device according to claim 1.

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