JP5320966B2 - Extraction tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pull-out tool 10 structured so as to prevent a part pulled out from a fitting hole or the like from separating. <P>SOLUTION: The pull-out tool 10 is used to draw out a part having a cylindrical part 26 and a locked part 25 protruding radially outward from an outer peripheral surface of the cylindrical part 26 in an axial direction of the part 26. The pull-out tool 10 includes: a pair of locks 28 capable of axially engaging with the locked part 25 at two 180&deg; opposite positions on the outer peripheral surface of the cylindrical part 26; and regulating means 33 and 33 for restraining the pair of locks 28 and the locked part 25 from relatively moving in a radial direction of the cylindrical part 26 and also in a direction orthogonal to the facing direction of the pair of locks 28 while the pair of locks 28 are engaged with the locked part 25. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an extraction tool used for extracting a part fitted in an attachment hole or the like from the attachment hole or the like.

  In a rolling mill for steel, a rolling roller and a drive motor that drives the rolling roller are connected by a drive shaft. This drive shaft is easily damaged due to a large load, and it is important to detect the damage as soon as possible to prevent failure. For this reason, there is a technology in which a sensor unit incorporating a sensor or a communication device for wirelessly communicating the detection result is attached to a cross joint provided in the middle of the drive shaft, and an abnormality occurring in the drive shaft is quickly detected by the sensor. It has been developed (for example, see Patent Document 1 below).

  As shown in FIG. 1, a sensor unit 20 for detecting an abnormality in the drive shaft 11 is fitted in a mounting hole 19 formed in a bearing cup 18 of the cross joint 13 and fixed by screwing or the like. . And this sensor unit 20 needs to be removed for every predetermined period for maintenance, such as battery replacement, and the removal tool 110 as shown in FIG. 10 was conventionally used for this removal.

The pulling tool 110 includes locking portions 128 that protrude inward in the opposite direction at both ends of a handle 129 formed in a U-shape. The sensor unit 20 includes a cylindrical portion 26 at the upper end portion, and a disk-like locked portion 25 that protrudes radially outward from the upper portion of the cylindrical portion 26.
Then, the pulling tool 110 allows the locking portion 128 to be locked by passing the locking portion 128 from the upper side through the cutout portions 27 formed on both sides of the locked portion 25 and rotating it about 90 °. The sensor unit 20 can be pulled out from the mounting hole 19 by engaging the portion 25 in the axial direction and pulling up the handle 129 with fingers.

International Publication No. 2007/052504 Pamphlet

However, the conventional extraction tool 110 can move relative to the locked portion 25 in the direction of the arrow X in FIG. 10B with the locked portion 128 engaged with the locked portion 25. For this reason, the sensor unit 20 pulled out from the mounting hole 19 may fall out of the pulling tool 110, which causes the sensor unit 20 to be lost or damaged.
In view of such a situation, an object of the present invention is to prevent a component extracted from a mounting hole or the like from falling out of a tool for extraction.

The extraction tool of the present invention is an extraction tool for extracting a part having a cylindrical part and a locked part protruding radially outward from the outer peripheral surface of the cylindrical part in the axial direction of the cylindrical part. A pair of locking portions that can be engaged with the locked portion in the axial direction at two positions opposite to each other at 180 ° on the outer peripheral surface of the cylindrical portion, and the pair of locking portions. The pair of locking portions in the radial direction of the cylindrical portion and in a direction orthogonal to the opposing direction of the pair of locking portions (hereinafter simply referred to as “predetermined direction”) in a state of being engaged with the locking portions. And a restricting means for restricting relative movement of the locked part, and a thrust applying means for applying a thrust in a direction of pulling out the component to the locking part, the restricting means, provided corresponding to each of the pair of locking portions, and the outer circumferential surface of the cylindrical portion Comprising a regulating portion that is contactable with structure at two locations spaced in the circumferential direction even without the thrust applying means has an axis along a direction of pulling the component, and the rotation of the axis thereof A jack bolt for converting the force into a direction in which the component is pulled out is provided .

  According to this configuration, the component can be pulled out from the mounting hole or the like by engaging the pair of locking portions of the extraction tool with the locked portion of the component and pulling the extraction tool in the axial direction. And since the relative movement to a predetermined direction of a pair of latching | locking part and a to-be-latched part is controlled by a control means, the components after extracting from an attachment hole etc. do not fall out from the extraction tool. Therefore, loss or damage of the part can be prevented.

The restricting means includes a restricting portion provided corresponding to each of the pair of locking portions, and each restricting portion contacts at least two locations in the circumferential direction with respect to the outer peripheral surface of the cylindrical portion. Since it is configured to be able to contact, the restriction portion provided corresponding to each locking portion abuts on the outer peripheral surface of the cylindrical portion, so that the pair of locking portions and the locked portion in a predetermined direction Relative movement can be restricted, and it is possible to suitably prevent a component extracted from the attachment hole or the like from falling out of the extraction tool.

Further, the extraction tool of the present invention is an extraction tool for extracting a part having a cylindrical part and a locked part protruding radially outward from the outer peripheral surface of the cylindrical part in the axial direction of the cylindrical part. A pair of locking portions that can be engaged with the locked portion in the axial direction at two positions on the outer peripheral surface of the cylindrical portion that are 180 ° apart, and the pair of locking portions. The pair of engagements in the radial direction of the cylindrical portion and in a direction orthogonal to the opposing direction of the pair of engagement portions (hereinafter simply referred to as “predetermined directions”) in a state of being engaged with the engagement portions. comprising a regulating means for the the stop portion and the engaged portion is restricted from being moved relative to the object to be locked portion, have a peripheral surface concentric with the outer peripheral surface of said cylindrical portion, said regulating means Includes a restriction portion provided corresponding to each of the pair of locking portions, and each of the restriction portions is the locked portion. Characterized in that it is contactable with composed of at least circumferentially apart two positions with respect to the outer peripheral surface of.
According to this configuration, the component can be pulled out from the mounting hole or the like by engaging the pair of locking portions of the extraction tool with the locked portion of the component and pulling the extraction tool in the axial direction. And since the relative movement to a predetermined direction of a pair of latching | locking part and a to-be-latched part is controlled by a control means, the components after extracting from an attachment hole etc. do not fall out from the extraction tool. Therefore, loss or damage of the part can be prevented. Moreover, the relative movement of the pair of locking portions and the locked portions in a predetermined direction is controlled by the restriction portions provided corresponding to the locking portions coming into contact with the outer peripheral surface of the locked portions. Therefore, it is possible to suitably prevent the parts pulled out from the mounting holes and the like from falling out of the drawing tool.

  It is preferable that the drawing tool of the present invention further includes a thrust applying means for applying a thrust in a direction of pulling out the component to the locking portion. This makes it easier to pull out the parts.

  According to the present invention, it is possible to prevent a component pulled out from a mounting hole or the like from falling out of a drawing tool.

  FIG. 1 is a perspective view showing a part that is pulled out from a hole by using a drawing tool according to an embodiment of the present invention. In this figure, a part of a drive shaft 11 used in a rolling facility or the like is shown in an exploded state. This drive shaft 11 is a first shaft 12 having one end connected to a not-shown rolling roller. And a second shaft 14 connected to the first shaft 12 via a cross joint 13. The first shaft 12 and the second shaft 14 are connected to each other by a cross joint 13 so as to be integrally rotatable and relatively swingable.

The cross shaft joint 13 includes a cross shaft 17 having four shaft portions 16 arranged in a cross shape, and a bearing cup 18 fitted to each shaft portion 16. A plurality of rollers are provided between the cross shaft 17 and the bearing cup 18 so as to be able to roll.
A hole 19 is formed substantially at the center of the outer peripheral surface of the bearing cup 18. The hole 19 is originally a grease hole for lubricating the rolling contact portion with the bearing cup 18. In this embodiment, the hole 19 is a mounting hole for mounting the sensor unit 20 for detecting the state of the cross shaft 17. Has been diverted to. The extraction tool of the present embodiment is used for extracting the sensor unit 20 fitted in the mounting hole 19 of the bearing cup 18 from the mounting hole 19.

  FIG. 2 is a perspective view showing the extraction tool 10 and the sensor unit 20. The sensor unit 20 includes a cylindrical case 21 in which a battery, a sensor substrate, an antenna, and the like are built. An annular flange portion 22 projecting radially outward is formed on the upper outer peripheral surface of the case 21. A plurality of screw insertion holes 23 are formed in the flange portion 22, and the sensor unit 20 fitted in the mounting hole 19 is fixed to the bearing cup 18 by screws inserted into the screw insertion holes 23.

  The upper end surface of the case 21 is provided with a locked portion 25 for engaging the extraction tool 10 in order to extract the sensor unit 20 from the attachment hole 19. Specifically, a cylindrical portion 26 having an outer diameter smaller than the outer diameter of the case 21 is provided coaxially on the upper end surface of the case 21, and the upper end of the cylindrical portion 26 extends from the outer peripheral surface of the cylindrical portion 26. Also, a substantially disc-like locked portion 25 that protrudes radially outward is provided. Cutout portions 27 cut by straight lines parallel to each other are formed on both sides in the radial direction of the locked portion 25.

On the other hand, the extraction tool 10 includes a pair of locking portions 28 that can be engaged with a locked portion 25 provided in the case 21 in the axial direction, and a connecting portion that connects the pair of locking portions 28 to each other. 29, and the connecting portion 29 has a function as a handle of the extraction tool 10.
The connecting portion 29 is formed by bending an elongated strip into a U-shape, and includes a horizontal piece 30 and a pair of vertical pieces 31 extending orthogonally from both ends of the horizontal piece 30. . The pair of locking portions 28 are formed integrally with the connecting portion 29 by bending the tip end portions of the pair of vertically oriented pieces 31 in the opposite inner side.

  The distance between the pair of locking portions 28 is set so that they can be disposed at two positions on the outer peripheral surface of the cylindrical portion 26 that are opposite to each other by 180 °. Further, the opposing edges 32 of the pair of locking portions 28 are formed in a concave arc shape that curves with substantially the same curvature as the outer peripheral surface of the cylindrical portion 26. As shown in FIG. 4, when the pair of locking portions 28 are arranged at two positions opposite to each other by 180 ° on the outer peripheral surface of the cylindrical portion 26, the opposing end edges 32 of the pair of locking portions 28 are A small gap is provided along the outer peripheral surface of the.

By forming the opposing end edges 32 of the pair of locking portions 28 in a concave arc shape, two protrusions 33 projecting in the opposing direction are formed on both sides in the width direction of the opposing end edges 32 of the respective locking portions 28. Will be formed. The distance L between the protrusion 33 of the one locking portion 28 and the protrusion 3 of the other locking portion 28 that are arranged in line-symmetric positions with each other is set smaller than the outer diameter D of the cylindrical portion 26. ing.
The two protruding portions 33 of each locking portion 28 can be brought into contact with the outer peripheral surface of the cylindrical portion 26 at at least two locations separated in the circumferential direction. The movement of the relative movement of the stop portion 28 in the arrow X direction (the radial direction of the cylindrical portion 26 and the direction orthogonal to the opposing direction of the pair of locking portions 28) is restricted. In other words, the two protrusions 33 provided in each locking portion 28 prevent the locking portion 28 engaged with the locked portion 25 from moving relative to the locked portion 25 in the arrow X direction. It constitutes a regulating section (regulating means) that regulates.

Hereinafter, a method of using the extraction tool 10 will be described.
As shown in FIG. 2, the pair of locking portions 28 of the extraction tool 10 are arranged on the outside of the outer peripheral surface of the cylindrical portion 26 through the cutout portions 27 of the locked portions 25 from above (see FIGS. 2 and 2). 10 ′) indicated by a two-dot chain line in FIG. Then, the pulling tool 10 is rotated about 90 ° around the axis O of the cylindrical portion 26 to engage the pair of locking portions 28 with the locked portions 25 in the axial direction. This state is shown in FIG. The sensor unit 20 can be pulled out from the mounting hole (see FIG. 1) by placing a finger on the connecting portion 29 of the pulling tool 10 and pulling it upward Y.

  Since the distance L between the protrusions 33 formed on the opposing end edges 32 of the pair of locking portions 28 is smaller than the outer diameter D of the cylindrical portion 26, the pulling tool 10 is moved from the sensor unit 20 with respect to the sensor unit 20. The relative movement of the extraction tool 10 is restricted by the protrusion 33 coming into contact with (being caught on) the outer peripheral surface of the cylindrical portion 26 even if the relative movement is attempted in the arrow X direction. Therefore, after pulling out the sensor unit 20 from the mounting hole 19, the sensor unit 20 is hardly dropped from the pulling tool 10, and damage or loss of the sensor unit 20 can be prevented.

FIG. 5 is a plan cross-sectional view of the main part in a state in which the extraction tool 10 according to the second embodiment of the present invention is attached to a component.
In this embodiment, the opposing end edges 32 of the pair of locking portions 28 of the extraction tool 10 are recessed in a V shape, thereby projecting in opposite directions on both circumferential sides of each locking portion 28. Two protrusions 33 are formed. An interval L between the protrusion 33 of the one locking portion 28 and the protrusion 33 of the other locking portion, which are arranged in line-symmetric positions with each other, is set smaller than the diameter D of the cylindrical portion 26. The two protrusions 33 provided in each locking portion 28 can be in contact with two locations on the outer peripheral surface of the cylindrical portion 26 that are separated from each other in the circumferential direction. A restricting portion that restricts relative movement of the locked portion 25 and the locking portion 28 engaged therewith in a direction orthogonal to the facing direction of the portion 28 is configured. Therefore, the present embodiment has the same operational effects as the first embodiment.

FIG. 6 is a perspective view showing a state in which the extraction tool 10 according to the third embodiment of the present invention is attached to a part, and FIG. 7 is a plan view of a main part in a state in which the extraction tool 10 is attached to the part. It is sectional drawing.
In this embodiment, two protrusions 34 are formed corresponding to each of the pair of locking portions 28. The two projecting portions 34 corresponding to the respective locking portions 28 substantially extend along the outer peripheral surface of the locked portion 25 from the both sides in the width direction of the longitudinally facing pieces 31 slightly above the locking portions 28. Thus, it protrudes and can contact | abut to the outer peripheral surface of the to-be-latched part 25. FIG. In addition, the distance L2 between the protrusion 34 of the one locking portion 28 and the protrusion 34 of the other locking portion 28 that are arranged in line-symmetric positions with each other is based on the diameter D2 of the outer peripheral surface of the locked portion 25. Is also getting smaller.

  In the present embodiment, the two protrusions 34 formed on each locking portion 28 constitute a restricting portion. Even if the extraction tool 10 is moved relative to the sensor unit 20 in the radial direction of the cylindrical portion 26 and in the direction orthogonal to the opposing direction of the pair of locking portions 28, the protruding portion 34 is locked. The relative movement of the extraction tool 10 is restricted by contacting (hooking) the outer peripheral surface of the portion 25. Therefore, after pulling out the sensor unit 20 from the mounting hole 19, the sensor unit 20 is hardly dropped from the pulling tool 10, and damage or loss of the sensor unit 20 can be prevented.

  FIG. 8 is a front cross-sectional view of a state in which the extraction tool 10 according to the fourth embodiment of the present invention is attached to a component, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. The extraction tool 10 of the present embodiment includes an annular ring portion 35 that connects a pair of vertically oriented pieces slightly above the locking portion 28. And in this embodiment, the annular ring part 35 comprises the control part.

The inner diameter of the annular portion 35 is formed to be slightly larger than the outer diameter of the locked portion 25, and when the locking portion 28 is engaged with the locked portion 25, the annular portion 35 becomes the locked portion. It arrange | positions so that a slight clearance may be followed with respect to the outer peripheral surface of 25. Thus, even if the extraction tool 10 is moved relative to the sensor unit 20 in the radial direction of the cylindrical portion 26 and in the direction orthogonal to the opposing direction of the pair of locking portions 28, the annular portion 35 is covered. The relative movement is restricted by contacting the outer peripheral surface of the locking portion 25. For this reason, after pulling out the sensor unit 20 from the mounting hole 19, the sensor unit 20 is hardly dropped from the pulling tool 10, and the sensor unit 20 can be prevented from being damaged or lost.
Further, the annular portion 35 also has a function as a reinforcing member for keeping the distance between the pair of locking portions 28 constant by increasing the rigidity of the extraction tool 10.

  In the third embodiment, the annular portion 35 of the present embodiment surrounds the two protrusions 34 (see FIG. 7) provided corresponding to each of the pair of locking portions 28. It corresponds to an integrated one by connecting in the direction. Therefore, similarly to the third embodiment, in the present embodiment, a restricting portion is provided corresponding to each of the pair of engaging portions 28, and each restricting portion is at least 2 on both sides in the circumferential direction of each engaging portion 28. It is configured to be able to come into contact with the outer peripheral surface of the locked portion 25 at a location.

  Further, the extraction tool 10 of the present embodiment further includes a thrust applying means (extraction force applying means) that applies a thrust (extraction force) for extracting the sensor unit 20 to the locking portion 28. The thrust applying means includes a support piece 36 that protrudes radially outward from the vertical piece 31 of the connecting portion 29, and a jack bolt 37 that is screwed into a female screw 36a that vertically passes through the support piece 36. The jack bolt 37 is constituted by a hexagon socket head bolt, and the tip 37 a is in contact with the surface 18 a of the bearing cup 18 around the mounting hole 19.

  When the jack bolt 37 is rotated using a hexagon wrench or the like, the rotation is converted into an axial movement of the jack bolt 37 with respect to the support piece 36. Since the tip 37a of the jack bolt 37 is in contact with the surface 18a of the bearing cup 18, when the jack bolt 37 is moved in the direction of arrow a with respect to the support piece 36, the pair of locking portions 28 have a bearing cup. The reaction force from the surface 18a of 18 is given as an upward thrust. As a result, the sensor unit 20 can be lifted upward with a small operating force. Then, after the sensor unit 20 is lifted to some extent, the sensor unit 20 can be easily pulled out by placing a finger on the connecting portion 29 and pulling it upward.

  In addition, the thrust provision means of this embodiment is applicable also to the extraction tool 10 of the first to third embodiments. Further, the thrust applying means is not limited to the jack bolt, but may be configured using a lever or a link, but by using the jack bolt, the thrust in the pulling direction can be applied to the locking portion 28 with a simple structure. Can be granted.

The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate.
For example, the shape of the connecting portion 29 of the extraction tool 10 is not limited to a U-shape, and for example, a separate handle may be attached to the connecting portion 29. Further, the extraction tool 10 of the present invention includes both the projection 33 of the first or second embodiment and the projection 34 or the annular portion 35 of the third or fourth embodiment. Also good.
The extraction tool 10 of the present invention is not limited to a sensor unit for a rolling device, and can be used for extracting any part having a cylindrical portion and a locked portion.

It is a perspective view which shows the components extracted from a hole using the extraction tool which concerns on the 1st Embodiment of this invention. It is a perspective view which shows a mode that the tool for said extraction is attached to components. It is a front view of the state which attached the tool for extraction to parts. It is a plane sectional view (IV-IV arrow sectional view of Drawing 3) of the important section in the state where the extraction tool was attached to parts. It is a plane sectional view of the important section in the state where the extraction tool concerning a 2nd embodiment of the present invention was attached to parts. It is a perspective view which shows a mode that the extraction tool which concerns on the 3rd Embodiment of this invention is attached to components. It is a plane sectional view of the important section in the state where the extraction tool was attached to parts. It is front sectional drawing of the state which attached the extraction tool 10 which concerns on the 4th Embodiment of this invention to components. It is IX-IX arrow sectional drawing of FIG. (A) is a perspective view which shows a mode that the extraction tool 10 which concerns on a prior art is attached to components, (b) is a plane sectional view of the principal part in the state which attached this extraction tool 10 to components.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Extraction tool 19 Mounting hole 25 Locked part 26 Cylindrical part 28 Locking part 29 Connection part 32 Opposite edge 33 Protrusion part (regulation part)
34 Protrusion (regulator)
35 Circular part (Regulation part)
37 Jack bolt (Thrust imparting means)

Claims (1)

A tool for pulling out a part having a cylindrical part and a locked part protruding radially outward from the outer peripheral surface of the cylindrical part in the axial direction of the cylindrical part,
A pair of locking portions engageable in the axial direction with respect to the locked portion at two positions opposite to each other by 180 ° on the outer peripheral surface of the cylindrical portion;
With the pair of latching portions engaged with the latched portion, the pair of latching portions in a direction perpendicular to the opposing direction of the pair of latching portions in the radial direction of the cylindrical portion Restriction means for restricting relative movement of the locked portion;
A thrust applying means for applying a thrust in a direction of pulling out the component to the locking portion ;
The regulating means is provided corresponding to each of the pair of locking portions, and includes an abutment configured to be capable regulatory unit at two points spaced at least in the circumferential direction with respect to the outer circumferential surface of the cylindrical portion ,
The thrust applying means includes a jack bolt that has an axial center along a direction in which the component is pulled out and converts rotation around the axial center into a force in a direction in which the component is pulled out. Tool for pulling out.

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