JP7153319B2 - scraper device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scraper device used for scraping the outer peripheral surface of a tubular end portion of a pipe material or a joint member used as a gas pipe or a water pipe.

For gas pipes and water pipes, pipe members and joints made of resin such as polyethylene are used instead of conventional metal pipe members.
Especially in the case of resin pipes, when connecting to other pipes or joints at a construction site, the outer peripheral surface of the tubular end of one pipe is scraped by a scraper device, fitted to the other tubular end, and electrically energized. It is fused and connected by

For this reason, it is desirable that the outer peripheral surface of the tubular end after scraping on site by the scraper device is as smooth as possible. If the outer peripheral surface of the tubular end portion after the cutting process has irregularities, unevenness in the distance from the inner surface of the other tubular end portion will likely cause unevenness in energization or melting. As a result, even if the two tubular ends are fused and connected by electric current, there may be a portion where the fused strength is not sufficient, or there may be a portion where sufficient durability cannot be provided. there is a possibility.

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

By the way, some tubular end portions of pipe members or joint members have large inner diameters of several hundred millimeters, while others have small inner diameters of several tens of millimeters.

In the scraper devices disclosed in Patent Documents 1 and 2, a pantograph mechanism with a pair of long arms crossing each other is provided between a cylindrical fixed sleeve and a chuck member. By setting up the pantograph mechanism between the sleeve and the chuck member, the chuck member is moved far away from the sleeve and presses against the inner surface of the tubular end. Moreover, by adopting a pantograph mechanism, it can be used by being fixed to a plurality of tubular ends having different pipe diameters.
However, when the pantograph mechanism is provided between the sleeve and the chuck member, the outer diameter of the portion fixed by the chuck member becomes large even when the pantograph mechanism is folded to the minimum. As a result, scraper devices employing a pantograph mechanism cannot be inserted into tubular ends with small inner diameters, such as 40 mm, 30 mm, 25 mm, 20 mm, for example 50 mm or less.

Therefore, as disclosed in Patent Document 3, in a scraper device that is inserted into a tubular end portion with a small inner diameter, the fixed portion pushes up the chuck member by sandwiching it from the front and back. By adopting a structure in which nothing is placed between the sleeve and the chuck member in this way, the outer diameter of the portion fixed by the chuck member can be reduced, making it possible to insert into a tubular end portion with a small inner diameter. .
However, in the fixed portion of the clamping structure as disclosed in Patent Document 3, the chuck member cannot be moved to be far apart from the sleeve. It is difficult to fix one fixing part to a plurality of pipe diameters. As a result, in a scraper device that employs a fixing part with a pick-up structure, a plurality of fixing parts formed for each pipe diameter must be prepared, and the fixing part must be exchanged for each inner diameter of the tubular end to be worked. not.

Thus, the scraper device is required to be able to be used for pipe materials or joint members with a plurality of inner diameters, including small inner diameter pipe members or joint members, without exchanging fixing parts for each pipe diameter. ing.

In the scraper device according to the present invention, a blade tip is applied to the outer peripheral surface of the tubular end of a resin pipe or joint member, and the outer peripheral surface of the tubular end is rotated around the axis of the tubular end. In the scraper device for helical scraping, a fixing portion inserted and fixed to the tubular end portion in order to pivotally support the blade tip so as to rotate around the axis of the tubular end portion includes: a cylindrical fixing sleeve inserted into the tubular end portion and arranged along the axial direction of the tubular end portion; a movable sleeve; a plurality of chuck members that contact the inner surface of the tubular end portion; a plurality of first links that movably connect the fixed sleeve and one end of each of the chuck members; A plurality of second links movably connected to the movable sleeve and the movable sleeve are moved along the extending direction of the cylindrical fixed sleeve so that the plurality of chuck members move toward the inner surface of the tubular end portion. and a holding mechanism for holding the fixed sleeve in a state where the first link and the fixed sleeve are closer to each other than the outer diameter of the tubular fixed sleeve at the front end portion of the fixed sleeve. and the connection portion between the first link and the cylindrical stationary sleeve is located closer to the cylindrical portion than the connection portion between the second link and the movable sleeve. The first link is located near the central axis of the stationary sleeve and is longer than the second link.

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

In another scraper device according to the present invention, a blade tip is brought into contact with the outer peripheral surface of the tubular end of a resin pipe or joint member, and the outer circumference of the tubular end is rotated around the axis of the tubular end. A scraper device for helically scraping a surface, wherein a fixed part is inserted into and fixed to the tubular end in order to pivotally support the blade tip so as to rotate around the axis of the tubular end. a cylindrical fixing sleeve inserted into the tubular end portion and arranged along the axial direction of the tubular end portion; a movable 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 chuck member, and the other end of each chuck member. and a plurality of second links movably connecting the movable sleeve and the movable sleeve along the extending direction of the cylindrical fixed sleeve, so that the plurality of chuck members are connected to the tubular end portion and a holding mechanism for holding the first link and the fixed sleeve in a state of contact with the inner surface of the fixed sleeve, wherein the first link and the fixed sleeve are arranged at a front end portion of the fixed sleeve so that the outer diameter of the fixed sleeve is larger than the outer diameter of the tubular fixed sleeve. The chuck member is connected at a position near the central axis of the fixed sleeve, and the chuck member has a projection projecting toward the fixed sleeve on the surface of the side that contacts the fixed sleeve.

Preferably, the connecting portion of the first link with the fixed sleeve is connected at a position closer to the center axis of the cylindrical fixed sleeve than the connecting portion with the chuck member. , good.

In still another scraper device according to the present invention, a blade tip is brought into contact with the outer peripheral surface of a tubular end portion of a resin pipe member or a joint member, and the tubular end portion is rotated around the axis of the tubular end portion. A scraper device for helically scraping an outer peripheral surface, wherein a fixed portion is inserted into and fixed to the tubular end portion in order to pivotally support the blade tip so as to rotate around the axis of the tubular end portion. is a cylindrical fixing sleeve that is inserted into the tubular end portion and arranged along the axial direction of the tubular end portion; a movable sleeve that can be moved; a plurality of chuck members that contact the inner surface of the tubular end portion; a plurality of first links that movably connect the fixed sleeve and one end of each of the chuck members; A plurality of second links movably connecting the end and the movable sleeve, and the movable sleeve are moved along the extending direction of the cylindrical fixed sleeve so that the plurality of chuck members are connected to the tubular end. and a holding mechanism that holds the first link and the fixed sleeve in a state of abutting against the inner surface of the portion, wherein the first link and the fixed sleeve have a cylindrical shape larger than the outer diameter of the cylindrical fixed sleeve at the front end portion of the fixed sleeve. The first link and the fixed sleeve are connected at a position near the central axis of the fixed sleeve, and the connection portion between the first link and the fixed sleeve includes the connection portion between the first link and the chuck member, and the chuck member and the second chuck member. It is located closer to the center axis of the cylindrical stationary sleeve than either of the connecting portion with the second link and the connecting portion between the second link and the movable sleeve.

In the present invention, the first link and the second link move the movable sleeve along the axial direction of the cylindrical fixed sleeve by means of a holding mechanism using screw engagement between the fixed sleeve and the movable sleeve and a clamp knob. The chuck member is pinched from both sides and pushed up so as to separate the chuck member from the fixed sleeve.
Therefore, in the present invention, there is no need to provide an elastic member or a pantograph mechanism between the chuck member and the fixed sleeve for pushing the chuck member up from the fixed sleeve.
As a result, in the present invention, the imaginary minimum diameter of the fixing portion in a state where a plurality of chuck members are in contact with the periphery of the fixing sleeve can be made as small as possible. The fixing portion of the present invention can be inserted and fixed to a tubular end portion having a small diameter, such as 25 mm.

In addition, 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 between 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. The securing part is thereby secured to the tubular end.
Therefore, the fixing part of the present invention can be inserted and fixed to the tubular ends of a plurality of pipe members or joint members having different inner diameters, including small inner diameter pipe members or joint members. The scraper device can be used for scraping the outer peripheral surface of the tubular end portion without exchanging the fixing portion for each tube 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 a scraper device according to a first embodiment of the invention. 2 is a cross-sectional view of the scraper device of FIG. 1; FIG. FIG. 3 is an explanatory diagram of the shape of the contact surface of the chuck member of the scraper device of FIG. FIG. 4 is an illustration of a method of inserting and fixing the scraper device to the tubular end of the pipe or joint member. FIG. 5 is an explanatory diagram of a method of scraping the outer peripheral surface of a tubular end portion with a scraper device fixed to the tubular end portion. Figure 6 is an illustration of how to remove the scraper device from the tubular end. FIG. 7 is an explanatory diagram of a fixed state of the scraper device to a plurality of tubular ends having different pipe diameters. FIG. 8 is a schematic diagram for explaining the relationship between the connection state of the front link, chuck member, and rear link of the scraper device of the present embodiment and the easiness of rising. FIG. 9 is a schematic diagram for explaining the difference in holding force due to the length of the front link and the rear link. FIG. 10 is an explanatory diagram of the structure and action of the chuck member and its peripheral members of the scraper device according to the second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on the drawings.

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

The scraper device 1 shown in FIGS. 1 and 2 includes a fixed portion 10 inserted into and fixed to a tubular end portion, and a fixed portion 10 pivotally supported so as to be rotatably fed to the fixed portion 10 and pressed against the outer peripheral surface of the tubular end portion. and a movable portion 20 having an arm 24 that holds the blade tip 2 held thereon.

Such a scraper device 1 spirally scrapes the outer peripheral surface of the tubular end portion by rotating 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 tubular end after processing is as smooth as possible. If the outer peripheral surface of the tubular end portion after the cutting process has unevenness, the interval from the inner surface of the other tubular end portion will be uneven and difficult to be uniform. If the gap between the two tubular ends is not uniform like this, even if they are fused and connected by electric current, uneven energization and uneven melting are likely to occur, and there may be portions that are not fused with sufficient strength. It is likely that there will be a portion where sufficient durability cannot be provided.

In addition, some tubular ends of pipe members or joint members have large inner diameters of several hundred millimeters, while others have small inner diameters of several tens of millimeters. It is often required to connect multiple tubular ends of different tube diameters at one job site. In this case, it cannot be said that workability is good to replace the fixing part 10 inserted and fixed to the tubular end for each pipe diameter.
As described above, the scraper device 1 is capable of scraping a plurality of tubular ends having different pipe diameters without exchanging the fixed part 10 inserted and fixed to the tubular ends for each pipe diameter. is required.

However, conventionally, it has been difficult to use small pipe diameters of, for example, 50 mm or less without exchanging the fixing portion 10 for each pipe diameter. That is, in the fixed part 10 to be inserted into a pipe with a large diameter, a pantograph mechanism with a pair of long arms 24 intersecting each other is adopted between the cylindrical fixing sleeve 11 and the chuck member 14, and the chuck member 14 is moved. It can be moved far away from the sleeve. On the other hand, in a small pipe diameter of 50 mm or less, since the inner diameter for inserting the fixing part 10 is small, securing a space for adopting the pantograph mechanism between the fixing sleeve 11 and the chuck member 14 is a scraper device. It was technically difficult due to other specifications such as the strength required for 1.

Therefore, in the present embodiment, a scraper device 1 in which the chuck member 14 can be moved away from the sleeve at the fixed portion 10 to be inserted into a pipe with a small diameter will be described. As a result, the scraper device 1 of the present embodiment can be inserted into and fixed to a plurality of pipe diameters, including pipe diameters as small as 25 mm to 50 mm, for example.

The scraper device 1 shown in FIGS. 1 and 2 has 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 a fixed portion 10 .

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

The fixed sleeve 11 has an elongated 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 stationary sleeve 11 is inserted inside the substantially cylindrical movable sleeve 12 and the substantially cylindrical clamp knob 13 .
The outer peripheral surface of the substantially cylindrical fixing sleeve 11 and the inner peripheral surface of the clamp knob 13 are formed with threads that engage with each other. When the clamp knob 13 rotates on the outer peripheral surface of the fixed sleeve 11, it can move forward and backward along the longitudinal direction in which the fixed sleeve 11 extends. When the clamp knob 13 moves forward and backward along the longitudinal direction in which the fixed sleeve 11 extends, the movable sleeve 12 also moves forward and backward along the longitudinal direction in which the cylindrical fixed sleeve 11 extends. can move 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 that is pressed against the inner surface of the tubular end portion 50 . FIG. 3A shows a state in which a plurality of chuck members 14 are pressed against the smallest inner diameter among the plurality of tubular end portions 50 to be inserted. FIG. 3B shows a state in which a plurality of chuck members 14 are pressed against the largest inner diameter among the plurality of tubular end portions 50 to be inserted.

The chuck member 14 is a plate member having a contact surface 17 elongated in the extending direction of the fixed sleeve 11, as shown in FIGS. The contact surface 17 may be formed to have a rough surface with a plurality of protrusions.
The contact surface 17 of the chuck member 14 is curved along the smallest inner diameter among the plurality of tubular end portions 50 to be inserted, as shown in FIG. 3(A). The minimum inner diameter in this embodiment is 25 mm.

In this case, the contact surface 17 of the chuck member 14 is designed so that both end portions of the contact surface 17 are lifted from the inner surface of the tubular end portion 50 at the tubular end portion 50 having an inner diameter other than the minimum as shown in FIG. 3(B). become. The contact width between the chuck member 14 and the tubular end portion 50 is reduced. This tendency becomes conspicuous at a tube diameter of 50 mm, which is the maximum when trying to cope with a plurality of tube diameters that differ by a factor of two and a half, such as 25 mm and 50 mm. When the contact width between the chuck member 14 and the tubular end portion 50 becomes small, even if the chuck member 14 is strongly pressed against the tubular end portion 50 , the chuck member 14 is firmly prevented from being displaced from the tubular end portion 50 . It becomes difficult to fix.

The chuck member 14 elongated in the extending direction of the stationary sleeve 11 has a positioning rib portion 18 projecting outward from the contact surface 17 from its rear edge portion, as shown in FIGS.

The front link 15 is a substantially L-shaped link member. The tip of the substantially L-shaped short side portion of the front link 15 is movably connected to the front end portion of the stationary sleeve 11 . The tip 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 . A 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. They can be arranged along the outer peripheral surface of the fixed sleeve 11 so as not to form a gap with 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 stationary sleeve 11 , the outer diameter of the plurality of chuck members 14 due to the contact surface 17 is minimized prior to insertion into the tubular end 50 . 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 a movable portion 20 .

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

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

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

A plurality of concave grooves 28 are formed side by side along the edge of the long hole 27 in the substantially rectangular parallelepiped body 23 . An engagement pin 25 protruding from the substantially cylindrical shaft 21 enters a concave groove 28 . The plurality of concave grooves 28 are formed at positions corresponding to each of the plurality of target pipe diameters. If two standards are to be met, a plurality of grooves 28 may be formed separately for each standard along each pair of edges of the long hole 27 .
Shaft 21 and body 23 are attached to shaft 21 and body 23 by attaching clamp handle 22 from the rear side of shaft 21 while shaft 21 is inserted into long hole 27 of body 23 so that engaging pin 25 is engaged with one groove 28 . can be integrated with Shaft 21 is attached to body 23 so as not to rotate within body 23 .

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

The arm 24 has a substantially bar shape elongated in the front-rear direction.
The arm 24 is attached to a fixed wall portion 29 of the body 23 at a position near the center of the rear half.
The arm 24 is attached to the 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 .
Arm 24 extends forward from body 23 so as to extend along shaft 21 and cylindrical stationary sleeve 11 .
A blade tip 2 for cutting the outer peripheral surface of the tubular end portion 50 is replaceably attached to the front end of the arm 24 . The blade tip 2 is attached to the front end of the arm 24 so as to protrude further toward the shaft 21 than the arm 24 .
By rotating the arm 24 with respect to the body 23 , the blade tip 2 is movable so as to swing toward and away from the shaft 21 extending substantially parallel to the arm 24 .

A housing hole 30 for housing a spring 31 is formed in a surface of the rear end portion of the arm 24 facing the body 23 and a surface of the body 23 adjacent to the fixed wall portion 29 on the other end side. The spring 31 is accommodated in the accommodation hole 30 in a state of being compressed more than its natural length. The biasing force of the spring 31 brings the arm 24 rotatably attached to the body 23 into a state where the blade tip 2 is closest to the shaft 21 .

The rear end portion of the arm 24 attached to the fixed wall portion 29 of the body 23 and the adjacent fixed wall portion 29 of the body 23 are formed with cylindrical cam holes 32 and 33 extending therethrough. be.
The cam hole 32 of the arm 24 is formed with a larger diameter than the cam hole 33 of the fixed wall portion 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 cam shaft 35 protruding into the cam hole 32 of the arm 24, and the cam shaft and a retraction knob 37 provided on a portion of the arm 24 protruding on the opposite side of the arm 24 .
The eccentric cam portion 36 is formed in a disc shape having a diameter larger than that of the cam hole 33 of the fixed wall portion 29 . The center of the disc-shaped eccentric cam portion 36 is shifted from the center of the cam shaft 35 . As a result, the eccentric cam portion 36 changes its position inside the cam hole 32 of the arm 24 when the cam shaft 35 rotates.

By rotating the cam member 34 in one direction using the retract knob 37, the eccentric cam portion 36 presses and fixes the rear end portion of the arm 24 against the body 23 against the biasing force of the spring 31. be able to. Thereby, the arm 24 can be held in a retracted state in which the blade tip 2 is farthest from the shaft 21 .
By rotating the cam member 34 in the other direction from the held state, the eccentric cam portion 36 is moved away from the cam hole 32 of the arm 24 . The arm 24 becomes freely swingable.

Next, a method of scraping 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 portion 50, the scraper device 1 is fixed to the tubular end portion 50, scrapes the outer peripheral surface, and is removed from the tubular end portion 50 after the outer peripheral surface has been scraped.

FIG. 4 is an illustration of a method of inserting and fixing the scraper device 1 into a tubular end portion 50 of a pipe member or joint member.

When fixing the scraper device 1 to the tubular end portion 50, the user moves the plurality of chuck members 14 of the fixed portion 10 of the scraper device 1 along the outer peripheral surface of the fixed sleeve 11 as shown in FIG. 4(A). It is inserted inside the tubular end 50 in a collapsed state.

Then, as shown in FIG. 4B, the user rotates the clamp knob 13 in one direction. As a result, 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, followed by the rear link 16. The plurality of chuck members 14 are separated from the fixed sleeve 11 by both the front link 15 and the rear link 16 standing against the fixed sleeve 11 . The multiple chuck members 14 begin to spread around the stationary sleeve 11 .
Further, when the clamp knob 13 is rotated in one direction, the contact surfaces 17 of the plurality of chuck members 14 , which spread accordingly, hit the inner surface of the tubular end portion 50 .

Then, as shown in FIG. 4(C), when the clamp knob 13 is turned in one direction while the positioning ribs 18 of the plurality of chuck members 14 are in contact with the end surface of the tubular end portion 50, the plurality of chuck members 14 are rotated. The contact surface 17 of the chuck member 14 is pressed against the inner surface of the tubular end portion 50 . The clamp knob 13 holds the plurality of chuck members 14 against the inner surface of the tubular end 50 . Thereby, the fixed 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 portion 50 while being inserted into the tubular end portion 50 .

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

After that, as shown in FIG. 4(D), the retract 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 portion 50 .

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

When cutting the outer peripheral surface of the tubular end portion 50, 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 portion 50 as shown in FIG. 5(A). The shaft 21 may be rotated by manually rotating the clamp knob 13 or by a rotary driving tool attached to the chuck portion 26 .

The shaft 21 rotating in one direction moves forward while rotating. Accordingly, the movable portion 20 and the blade tip 2 attached to the tip of the arm 24 also move 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 biasing force of the spring 31 moves forward while rotating, so that the outer peripheral surface of the tubular end portion 50 is level with the height of the step of the blade tip 2 . It can be cut to the appropriate depth.

Then, as shown in FIG. 5(B), when the range required for welding with the other tubular end portion 50 is finished, the rotation of the shaft 21 is stopped.

FIG. 6 is an illustration of how to remove the scraper device 1 from the tubular end 50 .

When removing the scraper device 1 from the tubular end portion 50, first, as shown in FIG. 6A, the retraction knob 37 of FIG. 1 is rotated in one direction. 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 biasing force of the spring 31 . The scraped blade tip 2 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. Thereby, the clamp knob 13 moves rearward while rotating around the fixed sleeve 11 . By retracting the clamp knob 13, the movable sleeve 12 is released from the clamp knob 13, and the movable sleeve 12 is allowed to move rearward. The plurality of chuck members 14 pressed against the inner surface of the tubular end portion 50 can be separated from the inner surface of the tubular end portion 50 .

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

Thereby, as shown in FIG. 6(C), the scraper device 1 that has finished the work can be removed from the tubular end portion 50 .
When the fixed part 10 of the scraper device 1 is pulled out from the tubular end part 50, the scraper device 1 after work can be removed from the tubular end part 50 so that the blade tip 2 does not come into contact with the scraped outer peripheral surface.
In this manner, the outer peripheral surface of the tubular end portion 50 can be scraped substantially uniformly so as to form a generally smooth surface over a predetermined range from the end surface of the tubular end portion 50 .

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

As shown in FIGS. 7A and 7B, the fixing portion 10 of the present embodiment has a small inner diameter (φ1 ) to a tubular end 50 with a large inner diameter (φ2>φ1) and fixed.
In the scraper device 1 of the present embodiment, the fixing part 10 is inserted into and fixed to a plurality of tubular ends 50 having different pipe diameters, so that the outer peripheral surfaces of the plurality of tubular ends 50 having different pipe diameters can be scraped. can.
The scraper device 1 can be used to scrape the outer peripheral surfaces of a plurality of tubular ends 50 having different pipe diameters, for example from a tubular end portion 50 having a pipe diameter of 25 mm to a tubular end portion 50 having a pipe diameter of 50 mm.

7A and 7B, the engaging pin 25 of the movable portion 20 has a plurality of concave portions according to the diameter of the tubular end portion 50, although not shown. Different grooves 28 are engaged in the grooves 28 .
The engagement pin 25 in the case of FIG. 7(A) is engaged with a groove 28 formed closer to the arm 24 than in the case of FIG. 7(B).

Next, the function and operation of the fixing portion 10 of the scraper device 1 of the present embodiment will be described in comparison with the modified example.

FIG. 8 is a schematic diagram for explaining 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 this embodiment and the easiness of rising.
In FIG. 8, the front link 15 is schematically illustrated as being formed in an I shape similar to the rear link 16, instead of an L shape, for the sake of clarity of explanation.
Also, the chuck member 14 is schematically illustrated as a flat straight plate member.

8A, the front link 15, the chuck member 14, and the rear link 16 are folded in a straight line along the outer peripheral surface of the fixed sleeve 11. In the modification shown in FIG.
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. 12 are arranged in a straight line along the outer peripheral surface of the fixed sleeve 11 .
The connecting portions 41 to 44 of these members are arranged 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, chuck member 14, or 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 aligned, function to inhibit the forward movement of the movable sleeve 12. As shown in FIG.

On the other hand, in FIG. 8B corresponding to this embodiment, the front link 15 is positioned at the front end portion of the stationary sleeve 11 so that the outer peripheral surface (outer diameter) of the tubular stationary sleeve 11 is larger than the outer peripheral surface (outer diameter) of the stationary sleeve 11 . It is connected with the fixed sleeve 11 at a position near the central axis.
A connection portion 41 of the front link 15 with the fixed sleeve 11 is connected at a position closer to the center axis of the cylindrical fixed sleeve 11 than a connection portion 42 of the front link 15 with the chuck member 14 . be.
In this case, the force that rotates the clamp knob 13 in one direction to move the movable sleeve 12 forward is applied through the rear link 16 aligned along the outer peripheral surface of the fixed sleeve 11 and the chuck member 14. , act 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 hinder the forward movement of the movable sleeve 12.
When the clamp knob 13 is rotated in one direction to move the movable sleeve 12 forward, the front link 15 immediately rises with a slight force, and then the rear link 16 rises, and the chuck member 14 is moved from the outer peripheral surface of the fixed sleeve 11. come to leave.

Further, in FIG. 8C as a modification of the present embodiment, the rear link 16 has a connection portion 44 with the movable sleeve 12 that is closer to the fixed sleeve 11 than the outer peripheral surface (outer diameter) of the cylindrical fixed sleeve 11 . It is located near the central axis of
In this modified example as well, when the clamp knob 13 is rotated in one direction to move the movable sleeve 12 forward, the rear link 16 immediately rises with a small amount of force, and then the front link 15 rises. 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. 8(C), the inner diameter of the movable sleeve 12 needs to be made small in order to provide the connecting portion 44 with the rear link 16 .
As a result, the diameter of the stationary sleeve 11 inserted inside the movable sleeve 12 and further the shaft 21 inside thereof must be small.
When the shaft 21 becomes thin in this way, even if the fixed part 10 can be inserted into the tubular end 50 and fixed firmly, the movable part 20 and the blade tip 2 will be damaged while the outer peripheral surface of the tubular end 50 is scraped. position is likely to fluctuate.
In order to suppress such fluctuations during work, it is necessary to form the shaft 21 with the same diameter as in the present embodiment. However, when the modified example of FIG.
The diameter of the stationary 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 stationary sleeve 11 than the other connecting portions 41-43. In this case, the outer diameter of the plurality of folded chuck members 14 also increases. The fixed part 10 of the scraper device 1 cannot be inserted into the tubular end part 50 of small diameter.
For this reason, among FIGS. 8A to 8C, the example of this embodiment in FIG. 8B is the most preferable.

FIG. 9 is a schematic diagram for explaining the difference in holding force due to the length of the front link 15 and the rear link 16. As shown in FIG.
In FIG. 9, for ease of explanation, the front link 15 is schematically illustrated as being formed in an I shape similar to the rear link 16, instead of an L shape as in FIG.

FIG. 9A is a modification of this 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, with the outer peripheral surface of the chuck member 14 pressed against the inner surface of the tubular end portion 50, the angle at which the front link 15 rises with respect to the fixed sleeve 11 (90 degrees - θ1) is 11 is larger than the rising angle (90 degrees - θ2).
The component force with which the front link 15 presses the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50 is greater than the component force with which the rear link 16 presses the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50 . Become.
As a result, the chuck member 14 is pressed against the inner surface of the tubular end portion 50 with different forces in the front-rear direction. As a result, chuck member 14 is held against the inner surface of tubular end 50 even if the entirety of chuck member 14 is pressed against the inner surface of tubular end 50 with a force greater than that required for normal retention. easily deviate.

FIG. 9B corresponds to this embodiment. In FIG. 9B, the front link 15 is formed longer than the rear link 16 (L1>L2).
In this case, with the outer peripheral surface of the chuck member 14 pressed against the inner surface of the tubular end portion 50, the angle at which the front link 15 rises with respect to the fixed sleeve 11 (90 degrees - θ1) is 11 is approximately the same as the angle (90 degrees-.theta.2).
The component force with which the front link 15 presses the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50 is approximately the component force with which the rear link 16 presses the front end portion of the chuck member 14 against the inner surface of the tubular end portion 50 . be the same.
As a result, the chuck member 14 is pressed against the inner surface of the tubular end portion 50 with substantially uniform force in the front-rear direction. The chuck member 14 is pressed against the inner surface of the tubular end portion 50 with an appropriate amount of force that is not excessively large as required for holding, and is easily displaced relative to the inner surface of the tubular end portion 50 .
In particular, as shown in FIG. 3B, when both widthwise end portions of the contact surface 17 of the chuck member 14 are lifted from the inner surface of the tubular end portion 50, the chuck member 14 is positioned at the widthwise center of the contact surface 17. Only a portion thereof will bear against the inner surface of the tubular end 50 .
In the case of FIG. 9B, 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. It is firmly fixed against the inner surface of the tubular end portion 50 and is less likely to slip against the inner surface of the tubular end portion 50 .

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

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

In this embodiment, the front link 15 and the fixed sleeve 11 are connected at the front end portion of the fixed sleeve 11 at a position closer to the central axis of the fixed sleeve 11 than the outer diameter of the cylindrical fixed sleeve 11. be. As a result, the connection portion 41 of the front link 15 with the fixed sleeve 11 is positioned 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. located near the central axis of the fixed sleeve 11 of the . By making the plurality of connecting portions 41 to 44 unbalanced and not in a straight line, 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. - 特許庁The front link 15, the chuck member 14, and the rear link 16, which are arranged along the outer peripheral surface of the cylindrical fixed sleeve 11, are arranged so as to prevent axial movement of the cylindrical fixed sleeve 11 with respect to the movable sleeve 12. become less functional. The front link 15 is moved so as to rise smoothly with a small force by the clamp knob 13, and the chuck member 14 is separated from the fixed sleeve 11. - 特許庁In addition, the movable sleeve 12 can be smoothly moved along the axial direction of the cylindrical fixed sleeve 11 without stress.

In this embodiment, the front link 15 connected to the stationary sleeve 11 at the front end portion of the stationary sleeve 11 at a position closer to the central axis than the outer diameter of the cylindrical stationary sleeve 11 is longer than the rear link 16 . formed on the scale. As a result, the front link 15 and the rear link 16 stand at approximately the same angle with respect to the chuck members 14 when 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 can stand at substantially the same angle with respect to the fixed chuck member 14 as compared to, for example, the case where they are formed to have the same length. As a result, both longitudinal end portions of the chuck member 14 are pressed against the inner surface of the tubular end portion 50 with approximately the same force. The chuck member 14 presses against the inner surface of the tubular end portion 50 with substantially uniform pressure over its entire longitudinal direction. The chuck member 14 can be preferably secured to the tubular end 50 with a high retention force so that it is less likely to shift during operation.

Moreover, when the same chuck member 14 is used for a plurality of tubular end portions 50 having small inner diameters as in this embodiment, the contact surface 17 of the chuck member 14 is curved along the smallest inner diameter to form a planar shape. formed to contact. In this case, the chuck member 14 is less likely to come into planar contact with an inner diameter that is not the smallest, and in an extreme case tends to come into linear contact. In this case, the holding force of the fixing portion 10 by the chuck member 14 may decrease. However, in this embodiment, the chuck member 14 is pressed against the inner surface of the tubular end portion 50 with substantially uniform pressure over the entire longitudinal direction. Therefore, in this embodiment, even if the chuck member 14 can only linearly contact the tubular end 50 of a tubular member or joint member that does not have the smallest inner diameter, Due to the high holding force in the entire longitudinal direction, it can be suitably fixed so that it is difficult to shift during work.

In this embodiment, in the movable portion 20 that holds the blade tip 2 and is pivotally supported to the fixed portion 10 so as to be rotatable, the eccentric cam portion 36 of the cam member 34 is rotatably provided on the body 23. . The eccentric cam portion 36 of the cam member 34 is rotated to hold the arm 24 so that the blade tip 2 is separated from the outer circumference of the tubular end portion 50 against the biasing force of the biasing member. Therefore, by operating the spacing member after the outer peripheral surface of the tubular end portion 50 has been shaved, the blade tip 2 can be held in a state separated from the outer peripheral surface that has been shaved. 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 scraping process with the blade tip 2 .

[Second embodiment]
Next, a scraper device 1 according to a second embodiment of the invention will be described.
In this embodiment, the chuck member 14 is improved so that it can start to rise easily.

FIG. 10 is an explanatory diagram of the structure and action 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. 10(A), the chuck member 14 of the scraper device 1 according to the second embodiment has projections 51 .
The convex portion 51 protrudes inward toward the fixed sleeve 11 from the inner surface of the chuck member 14 on the side that contacts the fixed sleeve 11 .
In this embodiment, the convex portion 51 is provided on the rear side portion of the inner surface of the chuck member 14 .
The convex portion 51 may be configured by inserting a threaded body into a threaded hole formed in the inner surface of the chuck member 14, for example. In this case, the protrusion amount of the protrusion 51 from the inner surface of the chuck member 14 can be finely adjusted by rotating the protrusion 51 .
Alternatively, for example, the convex portion 51 may be formed of a member integrally formed with the chuck member 14 so as to protrude from the inner surface of the chuck member 14 .

FIG. 10(B) is a diagram schematically illustrating the attitude of the chuck member 14 in FIG. 10(A).
As shown in FIG. 10(B), 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 , and the projection 51 is positioned on the outer periphery of the fixed sleeve 11 . hit the face.
The chuck member 14 is inclined with respect to the longitudinal direction of the fixed sleeve 11 so 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 clamp knob 13 is rotated and the movable sleeve 12 moves forward, the rear link 16 reliably pushes up the rear side of the chuck member 14 at the connecting portion 44 .
Therefore, as indicated by the circled arrow in FIG. 10(B), the entire chuck member 14 smoothly separates from the fixed sleeve 11 .
As a result, in this embodiment, when the movable sleeve 12 begins to move forward, the front link 15 rotates forward about the connecting portion 41 and begins to rise, and the entire chuck member 14 begins to separate from the fixed sleeve 11 . become.
After that, the front link 15 and the rear link 16 can reliably push up the chuck member 14 which is starting to move away from the fixed sleeve 11 smoothly 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 jam so as to hinder the forward movement of the movable sleeve 12 .
It is possible to almost certainly prevent the manufacturing of scraper devices 1 in which it is difficult for the chuck member 14 to begin to separate from the fixed sleeve 11 due to manufacturing variations among the plurality of scraper devices 1 .

On the other hand, for example, in the comparative example of FIG. 10C, the rear portion of the chuck member 14 is lower than the front portion when the stationary sleeve 11 is folded so as to be in contact with the outer peripheral surface. In this case, when the movable sleeve 12 begins to move forward, the rear link 16 presses the rear side of the chuck member 14 against the fixed sleeve 11 at the connecting portion 44 as indicated by the crossed-out arrow in the drawing. As a result, it becomes difficult for the rear link 16 to push up the rear side of the chuck member 14 . It becomes difficult for the chuck member 14 to smoothly begin to separate from the fixed sleeve 11 . Then, the movable sleeve 12 can no longer move forward. The movable sleeve 12 becomes jammed.
In this embodiment, the occurrence of such a situation can be prevented almost certainly.

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 and changes are possible without departing from the gist of the invention. .

For example, in the above embodiment, the clamp knob 13 is used to move the movable sleeve 12 along the extending direction of the cylindrical fixed sleeve 11 and hold it.
In addition, for example, by using a ratchet mechanism that holds the clamp knob 13 or the movable sleeve 12 at a plurality of positions in the extension direction of the fixed sleeve 11, the plurality of chuck members 14 are positioned to contact the inner surface of the tubular end portion 50. The movable sleeve 12 may be held.

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

Reference Signs List 1 scraper device 2 blade tip 10 fixed portion 11 fixed sleeve 12 movable sleeve 13 clamp knob 14 chuck member 15 front link 16 rear link 17 contact surface 18 rib portion 20 movable portion 21 Shaft 22 Clamp handle 23 Body 24 Arm 25 Engaging pin 26 Chuck portion 27 Long hole 28 Groove 29 Fixed wall portion 30 Accommodating hole 31 Spring spring 32 Cam hole 33 Cam hole 34 Cam member 35 Cam shaft 36 Eccentric cam portion 37 Retract knob 41 Connection portion 42 Connection portion 43 Connection portion 44 Connection portion 50 Tubular end portion 51 Convex portion

Claims (5)

A scraper device for spirally scraping the outer peripheral surface of a tubular end portion of a resin pipe member or joint member by applying a blade tip to the outer peripheral surface of the tubular end portion and feeding it in rotation around the axis of the tubular end portion. hand,
A fixing part inserted into and fixed to the tubular end in order to pivotally support the blade tip so as to rotate around the axis of the tubular end,
a cylindrical fixing sleeve disposed along the axial direction of the tubular end while being inserted into the tubular end;
a movable sleeve movable on the outer periphery of the cylindrical fixed sleeve in the extending direction of the fixed sleeve;
a plurality of chuck members against the inner surface of the tubular end;
a plurality of first links movably connecting the fixed sleeve and one end of each chuck member;
a plurality of second links movably connecting the other end of each chuck member and the movable sleeve;
a holding mechanism that moves the movable sleeve along the extending direction of the cylindrical fixed sleeve and holds the plurality of chuck members in contact with the inner surface of the tubular end;
havedeath,
The first link and the fixed sleeve are connected at the front end portion of the fixed sleeve at a position closer to the center axis of the tubular fixed sleeve than the outer diameter of the tubular fixed sleeve. ,
a connecting portion between the first link and the cylindrical stationary sleeve is positioned closer to the central axis of the cylindrical fixing sleeve than a connecting portion between the second link and the movable sleeve;
The first link is formed longer than the second link,
scraper device.
The chuck member has a curved contact surface along the smallest inner diameter for tubular ends of a plurality of tubular members or joint members having different inner diameters.
2. The scraper device of claim 1.
A scraper device for spirally scraping the outer peripheral surface of a tubular end portion of a resin pipe member or joint member by applying a blade tip to the outer peripheral surface of the tubular end portion and feeding it in rotation around the axis of the tubular end portion. hand,
A fixing part inserted into and fixed to the tubular end in order to pivotally support the blade tip so as to rotate around the axis of the tubular end,
a cylindrical fixing sleeve arranged along the axial direction of the tubular end while being inserted into the tubular end;
a movable sleeve movable on the outer periphery of the cylindrical fixed sleeve in the extending direction of the fixed sleeve;
a plurality of chuck members against the inner surface of the tubular end;
a plurality of first links movably connecting the fixed sleeve and one end of each chuck member;
a plurality of second links movably connecting the other end of each chuck member and the movable sleeve;
a holding mechanism that moves the movable sleeve along the extending direction of the cylindrical fixed sleeve and holds the plurality of chuck members in contact with the inner surface of the tubular end;
has
The first link and the fixed sleeve are connected at the front end portion of the fixed sleeve at a position closer to the center axis of the tubular fixed sleeve than the outer diameter of the tubular fixed sleeve. ,
The chuck member has a convex portion protruding toward the fixed sleeve on a surface that contacts the fixed sleeve,
scraper device.
said first linkabout,
The connecting portion with the fixed sleeve is connected at a position closer to the center axis of the tubular fixed sleeve than the connecting portion with the chuck member.
A scraper device according to any one of claims 1 to 3.
A scraper device for spirally scraping the outer peripheral surface of a tubular end portion of a resin pipe member or joint member by applying a blade tip to the outer peripheral surface of the tubular end portion and feeding it in rotation around the axis of the tubular end portion. hand,
A fixing part inserted into and fixed to the tubular end in order to pivotally support the blade tip so as to rotate around the axis of the tubular end,
a cylindrical fixing sleeve arranged along the axial direction of the tubular end while being inserted into the tubular end;
a movable sleeve movable on the outer periphery of the cylindrical fixed sleeve in the extending direction of the fixed sleeve;
a plurality of chuck members against the inner surface of the tubular end;
a plurality of first links movably connecting the fixed sleeve and one end of each chuck member;
a plurality of second links movably connecting the other end of each chuck member and the movable sleeve;
a holding mechanism that moves the movable sleeve along the extending direction of the cylindrical fixed sleeve and holds the plurality of chuck members in contact with the inner surface of the tubular end;
has
The first link and the fixed sleeve are connected at a position closer to the center axis of the cylindrical fixed sleeve than the outer diameter of the cylindrical fixed sleeve at the front end portion of the fixed sleeve. ,
A connection portion between the first link and the fixed sleeve is
The connecting portion between the first link and the chuck member, the connecting portion between the chuck member and the second link, and the connecting portion between the second link and the movable sleeve. located near the central axis of the fixed sleeve,
scraper device.

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