JP2011036926A - Method and tool for pulling out cylindrical member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for pulling out a cylindrical member with which the cylindrical member such as a dry bearing fitted into a non-pierced hole formed on an arbitrary member can be appropriately pulled out, and a tool for pulling out the cylindrical member. <P>SOLUTION: A fitted member 10 is of an approximately cylindrical shape, and a plurality of circumferentially formed sawteeth 13 are formed on an outer peripheral surface of the fitted member in a direction of pulling out so that frictional force caused when moving the fitted member in the direction of pulling out is larger than that caused when moving the fitted member in pressure-fitting. One or more clearance grooves 14 with a predetermined width are formed along the direction of pulling out. The method for pulling out includes: a step of pressure-fitting the fitted member into the cylindrical member; a step of rotating the fitted member by a predetermined angle to cause the sawteeth to engage from a circumferential direction with the internal wall surface of the cylindrical member facing the clearance groove when pressure-fitted; and a step of fixing relatively moving members (20 and 30) on the fitted member and moving the fitted member in the direction of pulling out the cylindrical member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cylindrical member extraction method and a cylindrical member extraction tool used when extracting a cylindrical member such as a dry bearing fitted in a non-through hole formed in an arbitrary member.

Conventionally, various extraction tools and extraction methods for extracting a cylindrical member such as a bearing fitted in a non-through hole formed in an arbitrary member have been disclosed.
For example, the prior art described in Patent Document 1 describes a bearing extraction tool including a collet portion that is inserted into a bearing that is fitted in a recessed portion such as a case. In this bearing extraction tool, the collet portion is divided in the circumferential direction by a plurality of grooves, and a bulge (claw portion) is formed at the tip of the collet portion. And after inserting a collet part so that a bearing may be penetrated, the outer diameter of a collet part is extended by screwing a bolt from the inner side of a collet part, and a nail | claw part is hooked on a bearing and it describes.
Further, in the prior art described in Patent Document 2, an anchor pot hard paper in which a long deformed round steel and a short deformed round steel whose end portions are obliquely cut obliquely and arranged in a direction perpendicular to a rod-shaped handle are attached. An extraction tool is described. And the outer peripheral surface of the anchor pot hard paper is arranged so that the short deformed round steel is arranged on the inner peripheral side of the cylindrical anchor pot hard paper fitted in the non-through hole and the long deformed round steel is arranged on the outer peripheral side. A long deformed round steel bar is inserted between the non-through hole and the handle is turned so that the short deformed round steel bar (or long deformed round steel bar) becomes the rotation axis. And it describes that it pulls out, after winding up an anchor pot hard paper with a long irregular round steel and a short irregular round steel.

Japanese Patent Laid-Open No. 10-146773 JP-A-10-202542

In the prior art described in Patent Document 1, when a cylindrical member such as a bearing is pulled out, stress concentrates on the claw portion at the tip of the collet portion, so that the claw portion may be deformed or broken.
Moreover, in the prior art described in Patent Document 2, when the cylindrical member to be extracted is a bearing or a dry bearing, it cannot be wound with a long deformed round steel and a short deformed round steel.
The present invention was devised in view of such points, and has a cylindrical shape capable of appropriately extracting a cylindrical member such as a dry bearing fitted in a non-through hole formed in an arbitrary member. It is an object to provide a member extraction method and a cylindrical member extraction tool.

As means for solving the above-mentioned problems, the first invention of the present invention is a method for extracting a cylindrical member as described in claim 1.
The cylindrical member extraction method according to claim 1 is a cylindrical member extraction method for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member. A fitting member that has an outer diameter larger than the inner diameter of the cylindrical member and is press-fitted in the insertion direction opposite to the extraction direction of the cylindrical member inside the cylindrical member; A relative movement member that moves the fitting member relative to an arbitrary member in the extraction direction of the cylindrical member is used.
The fitting member has a substantially columnar shape, and on the outer peripheral surface of the fitting member, a cylindrical member and a fitting member when the fitting member is moved in the insertion direction inside the cylindrical member. Saw teeth formed in the circumferential direction so that the frictional force between the cylindrical member and the fitting member when the fitting member is moved in the extraction direction is larger than the frictional force in the extraction direction. A plurality of relief grooves having a predetermined width are formed along the extraction direction, and the fitting member is press-fitted inside a target cylindrical member; and the fitting member And rotating the saw blade into the inner wall surface of the cylindrical member facing the relief groove at the time of the press-fitting from the circumferential direction, and the fitting member to the relative movement member Install the front It said fitting member for any member, having the steps of moving the extraction direction of the cylindrical member, a sampling method cylindrical member.

Moreover, 2nd invention of this invention is the extraction tool of a cylindrical member as described in Claim 2.
The extraction tool for a cylindrical member according to claim 2 is an extraction tool for a cylindrical member for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member, and is a target cylindrical member. A fitting member that has an outer diameter larger than the inner diameter of the cylindrical member and is press-fitted in the insertion direction opposite to the extraction direction of the cylindrical member inside the cylindrical member; A relative movement member that moves the fitting member in an extraction direction of the cylindrical member with respect to an arbitrary member.
And the said fitting member is substantially columnar shape, and the cylindrical member and fitting member when the said fitting member is moved to the said insertion direction inside the said cylindrical member on the outer peripheral surface of the said fitting member Saw teeth formed in the circumferential direction so that the frictional force between the cylindrical member and the fitting member when the fitting member is moved in the extraction direction is larger than the frictional force with the extraction direction. A plurality of relief grooves having a predetermined width are formed along the extraction direction.

Moreover, the 3rd invention of this invention is the extraction tool of a cylindrical member as described in Claim 3.
The cylindrical member extraction tool according to claim 3 is a cylindrical member extraction tool for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member. A fitting member inserted in the insertion direction opposite to the extraction direction of the cylindrical member, and the fitting member attached to the fitting member with respect to the arbitrary member in the extraction direction. And a relative movement member to be moved.
The fitting member has a substantially cylindrical shape, and a link mechanism that slides on the outer peripheral surface of the fitting member so as to draw an arc within a sliding surface that is an arbitrary plane passing through the axis of the fitting member. Are provided in the circumferential direction, and at the tip of each link mechanism portion, the frictional force with the cylindrical member when the fitting member is moved in the insertion direction inside the cylindrical member. Also, a friction member in which a plurality of saw teeth formed in the circumferential direction are formed along the extraction direction so that the frictional force with the cylindrical member when the fitting member is moved in the extraction direction is increased. Is attached.
In addition, the link mechanism portion has a diameter of the outermost periphery of the friction member at a sliding position at the time of insertion that slides and reaches when the fitting member is moved in the insertion direction inside the cylindrical member. Extraction which becomes the diameter of the outermost circumference of the friction member at the sliding position at the time of extraction that slides and reaches when the fitting member is moved in the extraction direction inside the cylindrical member The sliding range is set so that the diameter becomes larger.

Moreover, the 4th invention of this invention is the extraction tool of a cylindrical member as described in Claim 4.
The extraction tool for a cylindrical member according to claim 4 is the extraction tool for the cylindrical member according to claim 2 or 3, wherein a locked portion is provided on a side of the fitting member in the extraction direction. The relative movement member is a plate member having a screw member, a screw hole for fitting the screw member, and a locking portion for locking the locked portion of the fitting member. It is configured. Alternatively, the relative movement member has a locking portion that locks the locked portion of the fitting member and acts as an action point, and a contact that acts as a fulcrum at a position opposite to the locking portion. And a second arm part having a grip part connected to the vicinity of the contact part and acting as a power point.

The fifth invention of the present invention is a cylindrical member extraction tool as defined in claim 5.
The cylindrical member extraction tool according to claim 5 is the cylindrical member extraction tool according to claim 2 or 3, wherein the fitting member has a screw hole penetrating along the axial direction. The relative movement member is formed of a screw member that fits into the screw hole.

  If the cylindrical member extraction method according to claim 1 is used, on the inner wall surface of the cylindrical member fitted in the non-through hole formed in an arbitrary member (the surface facing the escape groove at the time of press-fitting), The cylindrical member can be extracted by appropriately biting the sawtooth of the fitting member.

  Moreover, according to the cylindrical member extraction tool according to claims 2 to 5, a cylindrical shape capable of appropriately extracting the cylindrical member fitted in the non-through hole formed in an arbitrary member. The member extraction tool can be appropriately realized.

It is a figure explaining the appearance of each member which constitutes extraction tool 1 in a 1st embodiment. It is a figure explaining signs that cylindrical member TW is extracted using extraction tool 1 in a 1st embodiment. It is a figure explaining the appearance of each member which constitutes extraction tool 2 in a 2nd embodiment. It is a figure explaining a mode that cylindrical shape member TW is extracted using the extraction tool 2 in 2nd Embodiment. It is a figure explaining the appearance of each member which constitutes extraction tool 3 in a 3rd embodiment. It is a figure explaining a mode that cylindrical member TW is extracted using the extraction tool 3 in 3rd Embodiment. It is a figure explaining the appearance of each member which constitutes extraction tool 4 in a 4th embodiment. It is a figure explaining the appearance of each member which constitutes extraction tool 4 in a 4th embodiment. It is a figure explaining a mode that cylindrical member TW is extracted using the extraction tool 4 in 4th Embodiment.

Hereinafter, a first embodiment to a fourth embodiment for carrying out the present invention will be described with reference to the drawings. 1 (A) to 1 (C) and FIGS. 2 (A) and 2 (B) show a cylindrical member extraction tool of the present invention (hereinafter, “cylindrical member extraction tool” will be referred to as “extraction tool”). The example of 1st Embodiment of this is shown.
In the first to fourth embodiments described below, the cylindrical member TW fitted in the non-through hole H formed in the arbitrary member BS is press-fitted into the non-through hole formed in the housing. An example of a dry bearing will be described.

[[Overall Configuration of Extraction Tool 1 in First Embodiment (FIGS. 1 and 2)]]
Next, the appearance of the extraction tool 1 (see FIG. 2B) and each member (see FIGS. 1A to 1C) constituting the extraction tool 1 in the first embodiment will be described.
The extraction tool 1 shown in FIG. 2 (B) includes a fitting member 10 shown in FIG. 1 (A), a plate member 20 shown in FIG. 1 (B), and a screw member 30 shown in FIG. 1 (C). It is configured. 1A to 1C show a plan view and a front view of each member.
In the first embodiment, the relative movement member that moves the fitting member 10 in the extraction direction with respect to the arbitrary member BS is constituted by the screw member 30 and the plate member 20.

A fitting member 10 shown in FIG. 1A has a substantially columnar shape, and includes a locked portion 11 and an insertion portion 12. Note that the right side of the insertion portion 12 in the front view of FIG. 1A shows the appearance, and the left side shows a cross-sectional view. The fitting member 10 is made of, for example, a material of S45C, and is then created by induction hardening.
The locked portion 11 is formed with a flange portion for locking (hanging) in the U groove 21 formed in the plate member 20 shown in FIG. A flat portion 11M is formed. In the example of FIG. 1A, four planes 11M are formed, but six or two planes may be used.
The insertion portion 12 has a cylindrical shape, and a plurality of saw teeth 13 are formed on the outer peripheral surface along the extraction direction (axial direction). The sawtooth 13 has a cylindrical shape when the fitting member 10 is moved in the extraction direction (upward in FIG. 2B) when press-fitted into the cylindrical member TW as shown in FIG. The frictional force between the cylindrical member TW and the fitting member 10 when the frictional force between the member TW and the fitting member 10 moves the fitting member 10 in the press-fitting direction (downward direction in FIG. 2B). The teeth are in the extraction direction so that they are larger.
Further, as shown in the AA cross-sectional view of FIG. 1A, a relief groove 14 having a predetermined width is formed on the outer peripheral surface of the insertion portion 12 along the extraction direction (the axial direction of the fitting member 10). Yes. The number of escape grooves 14 may be singular or plural. In the present embodiment, as shown in the A-A cross-sectional view of FIG. 1A, the circumferential direction of the insertion portion 12 is divided into eight, and the relief grooves 14 and the saw teeth 13 are alternately arranged. 14 and saw blade 13 are arranged.
Moreover, it is preferable to make the front-end | tip (the lower end of the front view in FIG. 1 (A)) of the insertion part 12 into a taper-tapered shape in order to make press fit easy.

In the plate member 20 shown in FIG. 1B, the locked portion 11 is larger than the diameters of the screw holes 22 and 23 having the screw grooves NM into which the screw member 30 is fitted and the insertion portion 12 of the fitting member 10. A U-shaped groove 21 (corresponding to a locking portion) having a diameter smaller than the width of the groove is formed.
The screw member 30 shown in FIG. 1 (C) is a so-called bolt having a top portion 31 for rotating with a spanner and an insertion portion 32 having a cylindrical shape and having a thread groove NM formed on the outer peripheral portion. It is.

● [Procedure for extracting cylindrical member in the first embodiment (FIG. 2)]
Next, with reference to FIGS. 2A and 2B, a procedure for extracting the cylindrical member TW fitted (press-fitted) into the non-through hole H formed in an arbitrary member BS using the extraction tool 1. Will be described.
In the first step, the insertion part 12 of the fitting member 10 is press-fitted into the hole (inside) of the cylindrical member TW to be extracted. The outer diameter of the fitting member 10 is set to be slightly larger than the inner diameter of the cylindrical member TW. For example, the fitting member 10 is struck using a hammer or the like and press-fitted.
In the next step, a spanner is applied to the locked portion 11 of the press-fitted fitting member 10 to rotate the fitting member 10 by a predetermined angle. The predetermined angle in this case is an angle at which the saw-tooth 13 bites into the inner wall surface of the cylindrical member TW facing the relief groove 14 when the fitting member 10 is press-fitted from the circumferential direction. In the case of the fitting member 10 shown in FIG. Thereby, the saw-tooth 13 can be made to bite into the inner wall surface of the cylindrical member TW like a machine tap.
In the next step, the U groove 21 of the plate member 20 is fitted into the fitting member 10, the screw member 30 is fitted into the screw holes 22 and 23 of the plate member 20, and the top 31 of the screw member 30 is wrenched. The two screw members 30 are rotated to move the plate member 20 in a direction away from the surface of the arbitrary member BS (extraction direction). Then, the screw member 30 may be rotated until the cylindrical member TW is removed from the arbitrary member BS.

[[Overall Configuration of Extraction Tool 2 in Second Embodiment (FIGS. 3 and 4)]
Next, the appearance of the extraction tool 2 (see FIG. 4) and each member (FIGS. 3A and 3B) constituting the extraction tool 2 in the second embodiment will be described.
The extraction tool 2 shown in FIG. 4 includes a fitting member 50 shown in FIG. 3 (A) and a screw member 60 shown in FIG. 3 (B). 3A and 3B show a plan view and a front view of each member.
In the second embodiment, the relative movement member that moves the fitting member 50 in the extraction direction with respect to the arbitrary member BS is constituted by the screw member 30.

A fitting member 50 shown in FIG. 3A has a substantially columnar shape, and includes a spanner hanging portion 51 and an insertion portion 52. Note that the right side of the insertion portion 52 in the front view of FIG. 3A shows the appearance, and the left side shows a cross-sectional view. The fitting member 50 is made of, for example, a material of S45C, and is then created by induction hardening.
The spanner hanging portion 51 is formed with a flat portion 51M for spanning and rotating. In the example of FIG. 3A, six planes 51M are formed, but four or two planes may be used.
The insertion portion 52 has a cylindrical shape, and a plurality of saw teeth 53 are formed on the outer peripheral surface along the extraction direction (axial direction). The shape of the saw blade 53 is the same as that of the saw blade 13 shown in FIG.
Further, as shown in the CC cross-sectional view of FIG. 3A, a relief groove 54 having a predetermined width is formed on the outer peripheral surface of the insertion portion 52 along the extraction direction (the axial direction of the fitting member 50). Yes. The number of escape grooves 54 may be singular or plural. In the present embodiment, as shown in the A-A cross-sectional view of FIG. 3A, the circumferential direction of the insertion portion 52 is divided into eight, and the relief grooves 54 and the saw teeth 53 are alternately arranged. 14 and saw blade 13 are arranged.
Moreover, it is preferable that the front-end | tip (the lower end of the front view in FIG. 3 (A)) of the insertion part 52 is made into a taper-taper shape in order to make press fit easy.
A screw hole 55 in which a screw groove NM for fitting the screw member 60 is formed is formed along the axial direction inside the fitting member 50. The screw hole 55 is a through hole.

  The screw member 60 shown in FIG. 3 (B) has a top part 61 for spanning and rotating, and an insertion part 62 having a cylindrical shape and having a thread groove NM formed on the outer peripheral part. . In the example shown in FIG. 3B, an example in which the diameter of the top portion 61 is smaller than the diameter of the insertion portion 62 is shown. However, the diameter of the top portion 61 is made larger than the diameter of the insertion portion 62, so There may be.

● [Procedure for Extracting Cylindrical Member in Second Embodiment (FIG. 4)]
Next, a procedure for extracting the cylindrical member TW fitted (press-fitted) into the non-through hole H formed in an arbitrary member BS using the extraction tool 2 will be described with reference to FIG.
In the first step, the insertion part 52 of the fitting member 50 is press-fitted into the hole (inside) of the cylindrical member TW to be extracted. The outer diameter of the fitting member 50 is set slightly larger than the inner diameter of the cylindrical member TW. For example, the fitting member 50 is struck using a hammer or the like and press-fitted.
In the next step, a spanner is hung on the spanner hanger 51 of the press-fitted fitting member 50, and the fitting member 50 is rotated by a predetermined angle. The predetermined angle in this case is an angle at which the saw-tooth 53 bites into the inner wall surface of the cylindrical member TW facing the relief groove 54 when the fitting member 50 is press-fitted from the circumferential direction. In the case of the fitting member 50 shown in FIG. Thereby, the saw-tooth 53 can be made to bite into the inner wall surface of the cylindrical member TW like a machine tap.
In the next step, the screw member 60 is fitted into the screw hole 55 of the fitting member 50, the spanner is hung on the top 61 of the screw member 60, the screw member 60 is rotated, and the fitting member 50 is moved to an arbitrary member BS. It moves in the direction away from the surface (sampling direction). Then, the screw member 60 may be rotated until the cylindrical member TW comes off the arbitrary member BS.

[[Overall Configuration of Extraction Tool 3 in the Third Embodiment (FIGS. 5 and 6)]
Next, the appearance of the extraction tool 3 (see FIG. 6) and each member (FIGS. 5A and 5B) constituting the extraction tool 3 in the third embodiment will be described.
The extraction tool 3 shown in FIG. 6 includes a fitting member 70 shown in FIG. 5 (A) and a lever member 80 shown in FIG. 5 (B). 5A and 5B show a plan view and a front view of each member.
In the third embodiment, the relative movement member that moves the fitting member 70 in the extraction direction with respect to the arbitrary member BS is constituted by the lever member 80.

The fitting member 70 shown in FIG. 5 (A) is the same as the fitting member 10 shown in FIG. 1 (A), and is a locked part 71 (11), an insertion part 72 (12), and a flat part 71M (11M). ), The description of the sawtooth 73 (13) and the relief groove 74 (14) is omitted.
A lever member 80 shown in FIG. 5 (B) includes a first arm portion 81 and a second arm portion 82.
The first arm portion 81 has a U groove 84 (corresponding to a locking portion) that locks the locked portion 71 and acts as an action point, and serves as a fulcrum at a position opposite to the U groove 84. It has a contact portion 83 that acts.
Further, the second arm portion 82 has a grip portion 85 that is connected to the vicinity of the contact portion 83 of the first arm portion 81 and acts as a power point.

[[Extraction Procedure of Cylindrical Member in Third Embodiment (FIG. 6)]
Next, with reference to FIGS. 6A and 6B, a procedure for extracting the cylindrical member TW fitted (press-fitted) into the non-through hole H formed in an arbitrary member BS using the extraction tool 3. Will be described.
In the first step, as in the first embodiment shown in FIGS. 2 (A) and 2 (B), for example, hammering is used to press-fit.
In the next step as well, as in the first embodiment shown in FIGS. 2A and 2B, the fitting member 70 is spanned over the locked portion 11 of the fitting member 70 that has been press-fitted, so that the fitting member 70 has a predetermined angle. Just rotate.
In the next step, the U groove 84 of the lever member 80 is fitted into the fitting member 70, the contact portion 83 is brought into contact with an arbitrary member BS, and the grip portion 85 is moved downward with the contact portion 83 as a fulcrum. Press down. Then, the grip 85 may be pushed down until the cylindrical member TW comes off the arbitrary member BS.

[[Overall Configuration of Extraction Tool 4 in Fourth Embodiment (FIGS. 7 to 9)]
Next, the extraction tool 4 (see FIG. 9) according to the fourth embodiment and the members (FIGS. 7A to 7C and FIGS. 8A to 8D) constituting the extraction tool 4 are described. The appearance will be described.
The extraction tool 4 shown in FIG. 9 includes a base fitting member A10 shown in FIG. 7A, a positioning plate A20 shown in FIG. 7B, a block member A30 shown in FIG. 7C, and FIG. The friction member A40 shown in FIG. 8A, the link A50 shown in FIG. 8B, the sliding restriction screw A60 shown in FIG. 8C, and the screw member A70 shown in FIG. 8D. Yes. 7A to 7C and 8A to 8D show a plan view and a front view of each member.
Moreover, in 4th Embodiment, as shown in FIG. 9, it fits combining the member shown to FIG. 7 (A)-(C), and the member shown to FIG. 8 (A)-(C). The relative movement member which comprises a member and moves a fitting member to the extraction direction with respect to arbitrary members BS is comprised by screw member A70.

A fitting member A10 shown in FIG. 7 (A) is not formed with a relief groove 54 and a saw tooth 53 on the outer peripheral surface of the fitting member 50 shown in FIG. 3 (A). A thread groove NMa is formed. Note that the through hole A15 (55) in which the spanner hanging part A11 (51), the insertion part A12 (52), the flat part A11M (51M), and the thread groove NMb (NM) are formed is shown in FIG. Since it is the same as the joint member 50, description is abbreviate | omitted.
The screw member A70 shown in FIG. 8D is the same as the screw member 60 shown in FIG. 3B, and the top portion A71 (61) and the insertion portion A72 (62) are also the same, and the description thereof is omitted. .

  The positioning plate A20 shown in FIG. 7B includes an opening hole A25 in which a screw groove NMc that fits into the screw groove NMa on the outer peripheral surface of the base fitting member A10 is formed, and a sliding restriction shown in FIG. This is a substantially disk-shaped member having a plurality of screw holes A26 in which screw grooves for fitting the screws A60 are formed. As shown in FIG. 9B, two positioning plates A20 are used for the base fitting member A10, and the block member A30 is sandwiched to hold the position of the block member A30 with respect to the base fitting member A10. (Position). The screw hole A26 is formed at a position corresponding to the notch A37 of the block member A30.

  A block member A30 shown in FIG. 7C includes an opening hole A35 in which a screw groove NMd that fits into the screw groove NMa on the outer peripheral surface of the base fitting member A10 is formed, and a link A50 shown in FIG. 8B. A plurality of notches A37 provided in the circumferential direction so as to support and pin holes H1 to H6 into which pins (not shown) for supporting the link A50 slidably with respect to the block member A30 are inserted. An annular member. As shown in FIGS. 9A and 9B, the links 50 are slidably supported in the notches A37 formed in the block member A30. A friction member A40 shown in (A) is slidably supported.

  A link A50 (corresponding to a link mechanism portion) shown in FIG. 8B includes a pin hole H51 through which pins (not shown) inserted into the pin holes H1 to H6 passing through the notches 37 of the block member A30, and a friction member And a pin hole H52 through which a pin (not shown) is inserted into the pin hole H40 formed in A40. When the extraction tool 4 is assembled as shown in FIGS. 9A and 9B, the link A50 is a slide that is an arbitrary plane passing through the shaft of the fitting member (or the shaft of the base fitting member A10). It slides so as to draw an arc around the pin hole of the block member A30 in the moving surface.

  In the friction member A40 shown in FIG. 8 (A), the extraction tool 4 is assembled on the arc surface A40M formed along the inner wall of the cylindrical member TW as shown in FIGS. 9 (A) and 9 (B). If the fitting member (or base fitting member A10) is moved in the insertion direction (downward direction in FIG. 9B), the drawing direction (FIG. 9) is greater than the frictional force with the cylindrical member TW. A plurality of saw teeth A43 formed in the circumferential direction are arranged along the extraction direction so that the frictional force when the fitting member (or base fitting member A10) is moved in the upward direction in FIG. Is formed. Further, the friction member A40 is formed with a pin hole H40 corresponding to the pin hole H52 of the link A50 at a position sandwiching the notch A47. The friction member A40 is attached to the pin hole 52 of the link A50 through the notch A47 and the pin hole H40.

The sliding restriction screw A60 shown in FIG. 8C is a positioning plate A20 disposed above and below the block member A30 when the extraction tool 4 is assembled as shown in FIGS. 9A and 9B. Threaded grooves are formed in the respective screw holes 26 to regulate the sliding range of the link A50 as shown in FIG. 9B.
In FIG. 9 (B), the slide regulating screw A60 attached to the positioning plate A20 located on the block member A30 is inserted in the fitting member (or base fitting member A10) in the insertion direction (FIG. 9 (B)). When the link A50 is moved downward (downward), the sliding position at the time of insertion when the link A50 slides upward in FIG. 9B is determined.
Further, in FIG. 9B, the sliding restriction screw A60 attached to the positioning plate A20 positioned below the block member A30 is used to remove the fitting member (or the base fitting member A10) (see FIG. 9B). 9), the link A50 slides downward in FIG. 9B and reaches the sliding position at the time of extraction.
In addition, the extraction diameter which becomes the diameter of the outermost periphery of the friction member A40 at the above-described sliding position at the time of extraction becomes larger than the insertion diameter which becomes the diameter of the outermost periphery of the friction member A40 at the above-mentioned sliding position at the time of insertion. In this way, the position of each sliding restriction screw A60 is adjusted.

[Extraction procedure of cylindrical member in the fourth embodiment (FIG. 9)]
Next, with reference to FIGS. 9A and 9B, a procedure for extracting the cylindrical member TW fitted (press-fitted) into the non-through hole H formed in an arbitrary member BS using the extraction tool 4. Will be described.
In the first step, as shown in FIGS. 9A and 9B, the extraction tool 4 assembled with each member is inserted inside the cylindrical member TW. When inserting, the link A50 slides to the sliding position at the time of insertion and the diameter becomes small, so that it can be inserted easily.
In the next step, the screw member A70 is wrenched on the top portion A71 of the screw member A70, the screw member A70 is rotated, and the fitting member (or the base fitting member A10) is moved away from the surface of the arbitrary member BS (withdrawing direction). Move. At the time of extraction, the link A50 slides to the sliding position at the time of extraction to increase the diameter, the saw tooth A43 of the friction member A40 bites into the inner wall of the cylindrical member TW, and moves the cylindrical member TW in the extraction direction. Then, the screw member A70 may be rotated until the cylindrical member TW is detached from the arbitrary member BS.

  The screw member A70 is omitted from the extraction tool 4 shown in FIG. 9B (the through hole A15 is also omitted), and the engagement member shown in FIG. If a locked portion similar to the locking portion 11 is provided, the relative movement member (configured by the plate member 20 and the screw member 30) shown in FIGS. 2A and 2B, and FIGS. The extraction tool can be configured using the relative movement member (the lever member 80) shown in B).

The cylindrical member extraction method and cylindrical member extraction tool of the present invention are not limited to the method, procedure, appearance, configuration, structure, etc. described in the present embodiment, and are various within a range that does not change the gist of the present invention. Can be changed, added, or deleted.
The cylindrical member extraction method and cylindrical member extraction tool described in the present embodiment are not limited to extraction of a dry bearing fitted in a non-through hole formed in the housing, and are formed on an arbitrary member. The present invention can be applied to extraction of various cylindrical members fitted into the non-through holes.

1, 2, 3, 4 Extraction tool 10, 50, 70 Fitting member 11, 71 Locked portion 12, 52, 72, A12 Insertion portion 13, 53, 73, A43 Sawtooth 14, 54, 74 Relief groove 20 Plate Member 21 U groove 22, 23 Screw hole 30, 60 Screw member 51 Spanner hook 55 Screw hole 80 Lever member 81 First arm portion 82 Second arm portion 83 Contact portion 84 U groove 85 Grip portion A10 Base fitting member A20 Positioning plate A26 Screw hole A30 Block member A37 Notch A40 Friction member A50 Link (link mechanism)
A60 Sliding regulating screw A70 Screw member BS Arbitrary member H Non-through hole NM Screw groove TW Cylindrical member

Claims (5)

A cylindrical member extraction method for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member,
A fitting member that has an outer diameter larger than the inner diameter of the target cylindrical member and is press-fitted in the insertion direction opposite to the extraction direction of the cylindrical member inside the cylindrical member;
A relative movement member that is attached to the fitting member and moves the fitting member in the extraction direction of the cylindrical member with respect to the arbitrary member;
The fitting member has a substantially columnar shape, and on the outer peripheral surface of the fitting member, a cylindrical member and a fitting member when the fitting member is moved in the insertion direction inside the cylindrical member. Saw teeth formed in the circumferential direction so that the frictional force between the cylindrical member and the fitting member when the fitting member is moved in the extraction direction is larger than the frictional force in the extraction direction. A plurality of relief grooves having a predetermined width are formed along the extraction direction.
Press-fitting the fitting member inside a cylindrical member of interest;
Rotating the fitting member by a predetermined angle to bite the sawtooth from the circumferential direction into the inner wall surface of the cylindrical member facing the relief groove during the press-fitting;
Attaching the relative movement member to the fitting member, and moving the fitting member relative to the arbitrary member in the extraction direction of the cylindrical member,
A method for extracting a cylindrical member. A cylindrical member extraction tool for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member,
A fitting member that has an outer diameter larger than the inner diameter of the target cylindrical member and is press-fitted in the insertion direction opposite to the extraction direction of the cylindrical member inside the cylindrical member;
A relative movement member attached to the fitting member and moving the fitting member with respect to the arbitrary member in the extraction direction of the cylindrical member;
The fitting member has a substantially columnar shape, and on the outer peripheral surface of the fitting member, a cylindrical member and a fitting member when the fitting member is moved in the insertion direction inside the cylindrical member. Saw teeth formed in the circumferential direction so that the frictional force between the cylindrical member and the fitting member when the fitting member is moved in the extraction direction is larger than the frictional force in the extraction direction. A plurality of relief grooves having a predetermined width are formed along the extraction direction.
Extraction tool for cylindrical members. A cylindrical member extraction tool for extracting a cylindrical member fitted in a non-through hole formed in an arbitrary member,
A fitting member that is inserted into the insertion direction opposite to the extraction direction of the cylindrical member inside the target cylindrical member;
A relative movement member that is attached to the fitting member and moves the fitting member relative to the arbitrary member in the extraction direction;
The fitting member has a substantially cylindrical shape, and a link mechanism that slides on the outer peripheral surface of the fitting member so as to draw an arc within a sliding surface that is an arbitrary plane passing through the axis of the fitting member. Are provided in the circumferential direction,
At the tip of each link mechanism portion, the fitting member is placed in the extraction direction more than the frictional force with the cylindrical member when the fitting member is moved in the insertion direction inside the cylindrical member. A friction member in which a plurality of saw teeth formed in the circumferential direction is formed along the extraction direction so that the frictional force with the cylindrical member at the time of movement is larger is attached,
The link mechanism portion has a diameter that is the diameter of the outermost periphery of the friction member at the insertion sliding position that slides and reaches when the fitting member is moved in the insertion direction inside the cylindrical member. The diameter of the outermost circumference of the friction member in the sliding position at the time of extraction that slides and reaches when the fitting member is moved in the extraction direction inside the cylindrical member. The sliding range is set to be larger,
Extraction tool for cylindrical members. A cylindrical member extraction tool according to claim 2 or 3,
A locked portion is formed on the side in the extraction direction of the fitting member,
The relative movement member is composed of a screw member, a plate member having a screw hole for fitting the screw member, and a locking portion for locking the locked portion of the fitting member.
Alternatively, the relative movement member has a locking portion that locks the locked portion of the fitting member and acts as an action point, and a contact that acts as a fulcrum at a position opposite to the locking portion. A first arm portion having a portion, and a second arm portion having a grip portion that is connected in the vicinity of the contact portion and acts as a power point.
Extraction tool for cylindrical members. A cylindrical member extraction tool according to claim 2 or 3,
The fitting member is formed with a screw hole penetrating along the axial direction,
The relative movement member is composed of a screw member that fits into the screw hole.
Extraction tool for cylindrical members.

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