Brake vehicle extracting jig

Abstract

To provide a brake wheel pull-out jig capable of more surely pulling out a brake wheel from a drive shaft and dispensing with a detent device.SOLUTION: The brake wheel pulling jig includes a pantograph-supporting member 1 provided on a driving shaft 6, a pair of pulling rods 2 provided one by one in a pair of through-holes 705 formed in a brake wheel 7, and a pulling member 3 provided over the pair of pulling rods 2 and moving each of the pair of pulling rods 2 in the D1a part of the pulling direction by moving in the D1a part of the pulling direction. And a pantograph device 4 that expands and contracts in a direction along an axis of the drive shaft 6, wherein the pantograph device 4 moves the drawing member 3 in the drawing direction D1a by contracting, and the drawing member 3 moves each of the pair of drawing rods 2 in the drawing direction D1a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a brake wheel extraction jig. [Background technology]

[0002] Conventionally, a brake wheel extraction jig has been known that includes a drawing base plate, a push screw, a pair of connecting mechanisms, and a pair of extraction rods. A threaded hole is formed in the drawing base plate. The push screws are inserted into the threaded holes formed in the drawing base plate. Each connecting mechanism connects a corresponding one of the pair of extraction rods to the drawing base plate. Each extraction rod is inserted into a corresponding one of a pair of through holes formed in the brake wheel and hooked onto the brake wheel. With each extraction rod inserted into the corresponding through hole and hooked onto the brake wheel, the push screws move toward the brake wheel relative to the drawing base plate and push the drive shaft, thereby extracting the brake wheel from the drive shaft (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-187630 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration of the brake wheel extraction jig described in Patent Document 1, each connecting mechanism includes a first connecting piece, a second connecting piece, and a third connecting piece. The first connecting piece is connected to the extraction bar. The second connecting piece is connected to the extraction base plate. The third connecting piece is connected to the first connecting piece and the second connecting piece. The first connecting piece, like the extraction bar, is arranged along the axis of the drive shaft. The third connecting piece is arranged at an angle relative to the first connecting piece. The angle of the third connecting piece relative to the first connecting piece is adjusted according to the radial size of the brake wheel. If the force with which the set screw presses the drive shaft is large, the angle of the third connecting piece relative to the first connecting piece may change while the set screw is pressing the drive shaft. If the angle of the third connecting piece relative to the first connecting piece changes while the set screw is pressing the drive shaft, the first connecting piece may be tilted relative to the axis of the drive shaft, which may cause the extraction bar to bend. If the pull rod is bent, it becomes difficult to remove the brake wheel from the drive shaft. Also, because the drive shaft is pressed by turning the set screw, a separate anti-rotation device is required to prevent the drive shaft and brake wheel from rotating.

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a brake wheel removal tool that can more reliably remove a brake wheel from a drive shaft and eliminate the need for an anti-rotation device. [Means for solving the problem]

[0006] The brake wheel removal jig according to the present disclosure comprises a pantograph support member provided on the drive shaft, a pair of removal rods provided in a pair of through holes formed in the brake wheel, one for each rod, a removal member provided across the pair of removal rods and moving in the removal direction, which is a direction along the axis of the drive shaft and in which the brake wheel is removed from the drive shaft, thereby moving each of the pair of removal rods in the removal direction, and a pantograph device provided across the pantograph support member and the removal member and expanding and contracting in the direction along the axis of the drive shaft; when the pantograph device contracts, the pantograph device moves the removal member in the removal direction, and the removal member moves each of the pair of removal rods in the removal direction. [Effects of the Invention]

[0007] The brake wheel removal jig according to the present disclosure allows the brake wheel to be more reliably removed from the drive shaft, making a rotation prevention device unnecessary. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing a brake wheel removal jig according to a first embodiment. FIG. [Figure 2] FIG. 2 is a right side view showing the brake wheel removal jig of FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 1. FIG. [Figure 5] FIG. 2 is a front view showing the drive shaft and brake wheel of FIG. 1. [Figure 6] 2 is a front view showing a state in which the pantograph device of FIG. 1 is contracted in the axial direction. FIG. [Figure 7] 1 is a front view showing a drive shaft and a brake wheel before a brake wheel removal jig according to a first embodiment is attached. FIG. [Figure 8] 8 is a front view showing a state in which a fixing part is attached to the drive shaft of FIG. 7. FIG. [Figure 9] 2 is a front view showing the pantograph device of FIG. 1 in an extended state. FIG. [Figure 10] 10 is a front view showing a state in which a pull-out member is disposed between the first and second pushing members and the pantograph support body in FIG. 9. FIG. [Figure 11] 11 is a front view showing a state in which a pantograph support body is inserted into a support member through-hole of the extraction member of FIG. 10.

[0033] FIG. [Figure 12] 12 is a front view showing a state in which the pantograph support body of FIG. 11 is attached to the fixing part of FIG. 8. FIG. [Figure 13] 13 is a front view showing a state in which a pair of extraction rods are attached across the extraction member and the brake wheel of FIG. 12. FIG. [Figure 14] FIG. 2 is a front view showing a brake wheel removal jig of a first comparative example. [Figure 15] FIG. 10 is a front view showing a brake wheel removal jig of a second comparative example. [Figure 16] 16 is a front view showing a state in which the angle of the third connecting piece relative to the first connecting piece in FIG. 15 has changed. FIG. [Figure 17] FIG. 10 is a front view showing a brake wheel removal jig according to a second embodiment. [Figure 18] FIG. 18 is a right side view showing the brake wheel removal jig of FIG. 17. [Figure 19] FIG. 1 is a diagram showing the configuration of three types of extraction members. [Figure 20] FIG. 1 is a diagram showing the configuration of three types of fixing parts. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 Fig. 1 is a front view showing a brake wheel removal jig according to embodiment 1. Fig. 2 is a right side view showing the brake wheel removal jig of Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 1.

[0010] The brake wheel extraction jig according to the first embodiment includes a pantograph support member 1, a pair of extraction rods 2, an extraction member 3, a pantograph device 4, and a link member rotation device 5. The brake wheel extraction jig according to the first embodiment is used when extracting, from the drive shaft 6, a brake wheel 7 that is fixed to the drive shaft 6 of an elevator hoisting machine.

[0011] Figure 5 is a front view showing the drive shaft 6 and brake wheel 7 of Figure 1. The direction along the axis of the drive shaft 6 is defined as the axial direction D1. The direction along the radius of a circle centered on the axis of the drive shaft 6 in a plane perpendicular to the axis of the drive shaft 6 is defined as the radial direction D2. The direction along the circumference of a circle centered on the axis of the drive shaft 6 in a plane perpendicular to the axis of the drive shaft 6 is defined as the circumferential direction D3. The direction along the axis of the drive shaft 6 in which the brake wheel 7 is pulled out from the drive shaft 6 is defined as the pulling direction D1a. The direction along the axis of the drive shaft 6 opposite to the pulling direction D1a is defined as the pressing direction D1b.

[0012] The drive shaft 6 is cylindrical in shape. The outer peripheral surface of the drive shaft 6 is tapered so that the diameter continuously decreases in the drawing direction D1a. A thread groove 601 is formed on the outer peripheral surface of the portion of the drive shaft 6 on the drawing direction D1a side.

[0013] The brake wheel 7 is attached to the drive shaft 6. The brake wheel 7 includes an inner cylindrical portion 701, a flange portion 702, and an outer cylindrical portion 703. The inner cylindrical portion 701, the flange portion 702, and the outer cylindrical portion 703 are integrally formed with one another.

[0014] The inner cylindrical portion 701 has a cylindrical shape. The inner cylindrical portion 701 is disposed coaxially with the axis of the drive shaft 6. A through hole 704 is formed in the center of the inner cylindrical portion 701 in the radial direction D2.

[0015] The through hole 704 penetrates the inner cylindrical portion 701 in the axial direction D1. The inner peripheral surface of the through hole 704 is tapered so that the diameter continuously decreases in the drawing direction D1a.

[0016] The drive shaft 6 is inserted into the through hole 704. The brake wheel 7 is attached to the drive shaft 6 by inserting the drive shaft 6 into the through hole 704. The brake wheel 7 is removed from the drive shaft 6 by pulling the drive shaft 6 out of the through hole 704.

[0017] The flange 702 has a disk shape and protrudes outward in the radial direction D2 from the outer circumferential surface of the inner cylindrical portion 701 at the side in the drawing direction D1a.

[0018] A pair of through holes 705 is formed in the middle portion of the flange portion 702 in the radial direction D2. Each of the through holes 705 penetrates the flange portion 702 in the axial direction D1. The pair of through holes 705 is arranged such that the through hole 704 is located between the pair of through holes 705 when viewed along the axial direction D1.

[0019] The outer cylindrical portion 703 has a cylindrical shape. The outer cylindrical portion 703 is disposed coaxially with the axis of the drive shaft 6. The outer cylindrical portion 703 is provided on the outer portion of the flange portion 702 in the radial direction D2.

[0020] In FIG. 5 , a nut 8 is attached to the drive shaft 6. The drive shaft 6 is screwed into the nut 8, thereby attaching the nut 8 to the drive shaft 6. Attaching the nut 8 to the drive shaft 6 prevents the brake wheel 7 from coming off the drive shaft 6. The nut 8 is attached to and detached from the drive shaft 6 by rotating in the circumferential direction D3 relative to the drive shaft 6. When the brake wheel 7 is to be removed from the drive shaft 6, the nut 8 is removed from the drive shaft 6.

[0021] The pantograph support member 1 is provided on the drive shaft 6. The pantograph support member 1 includes a fixing portion 101 and a pantograph support body 102.

[0022] The fixed portion 101 is fixed to the drive shaft 6. The fixed portion 101 includes a first cylindrical portion 103, a second cylindrical portion 104, and a third cylindrical portion 105. The first cylindrical portion 103 is attached to the drive shaft 6. The second cylindrical portion 104 is provided on the pulling-out direction D1a side relative to the first cylindrical portion 103. The third cylindrical portion 105 is provided on the pulling-out direction D1a side relative to the second cylindrical portion 104. The first cylindrical portion 103, the second cylindrical portion 104, and the third cylindrical portion 105 are arranged in a straight line along the axis of the drive shaft 6. The first cylindrical portion 103, the second cylindrical portion 104, and the third cylindrical portion 105 are formed integrally with one another.

[0023] The first cylindrical portion 103, the second cylindrical portion 104, and the third cylindrical portion 105 are each cylindrical. The diameter of the first cylindrical portion 103 is larger than the diameter of the end of the drive shaft 6 on the side of the pulling-out direction D1a. The diameter of the second cylindrical portion 104 is smaller than the diameter of the first cylindrical portion 103. The diameter of the third cylindrical portion 105 is smaller than the diameter of the second cylindrical portion 104.

[0024] An insertion hole 106 is formed in the surface of the first cylindrical portion 103 facing the pressing direction D1b. The insertion hole 106 is disposed so as to be recessed inward in the axial direction D1 on the surface of the first cylindrical portion 103 facing the pressing direction D1b. The end of the drive shaft 6 facing the pulling direction D1a is inserted into the insertion hole 106.

[0025] A thread groove is formed on the inner peripheral surface of the insertion hole 106. When the drive shaft 6 is screwed into the insertion hole 106, the first cylindrical portion 103 is attached to the drive shaft 6 and the fixed portion 101 is fixed to the drive shaft 6. When the first cylindrical portion 103 rotates in the circumferential direction D3 relative to the drive shaft 6, the fixed portion 101 is attached to and detached from the drive shaft 6.

[0026] The pantograph support body 102 is attached to the fixed part 101. The pantograph support body 102 includes a cylindrical part 107 and a support part 108. The cylindrical part 107 is attached to the fixed part 101. The support part 108 is provided on the pull-out direction D1a side of the cylindrical part 107. The cylindrical part 107 and the support part 108 are arranged side by side in a straight line along the axis of the drive shaft 6. The cylindrical part 107 and the support part 108 are formed integrally with each other.

[0027] The cylindrical portion 107 is formed into a cylindrical shape. The diameter of the cylindrical portion 107 is the same as the diameter of the second cylindrical portion 104. The support portion 108 is formed into a quadrangular prism shape. When viewed along the axial direction D1, the height and width dimensions of the support portion 108 are larger than the diameter of the cylindrical portion 107.

[0028] An insertion hole 109 is formed in a surface of the cylindrical portion 107 facing the pressing direction D1b. The insertion hole 109 is disposed so as to be recessed inward in the axial direction D1 on the surface of the cylindrical portion 107 facing the pressing direction D1b. The third cylindrical portion 105 is inserted into the insertion hole 109.

[0029] By inserting the third cylindrical portion 105 into the insertion hole 109, the cylindrical portion 107 is attached to the third cylindrical portion 105, and the pantograph support body 102 is attached to the fixed portion 101. By moving the cylindrical portion 107 in the axial direction D1 relative to the third cylindrical portion 105, the pantograph support body 102 is attached to and detached from the fixed portion 101.

[0030] An insertion hole 110 is formed in a surface of the support part 108 facing the pulling-out direction D1a. The insertion hole 110 is disposed in the surface of the support part 108 facing the pulling-out direction D1a so as to be recessed inward in the axial direction D1.

[0031] The pair of pull rods 2 are inserted one by one into a pair of through holes 705 formed in the flange 702 of the brake wheel 7. Each pull rod 2 includes a pull bolt 201, a nut 202, and a washer 203.

[0032] The draw bolt 201 is inserted into the through hole 705. A nut 202 and a washer 203 are attached to the draw bolt 201. A flange 702 of the brake wheel 7 is arranged between the head of the draw bolt 201 and the nut 202 and washer 203. In other words, the nut 202 and the washer 203 are arranged to face the surface of the flange 702 of the brake wheel 7 opposite to the head side of the draw bolt 201. The washer 203 is arranged between the nut 202 and the flange 702 of the brake wheel 7. As the draw bolt 201 moves in the draw-out direction D1a, the nut 202 is hooked onto the flange 702 of the brake wheel 7 via the washer 203, and the brake wheel 7 is disengaged from the drive shaft 6.

[0033] The extraction member 3 is provided across the pair of extraction rods 2. The extraction member 3 is formed in the shape of a long plate.

[0034] A support member through hole 301 is formed in the center portion of the extraction member 3 in the longitudinal direction. The support member through hole 301 penetrates the extraction member 3 in the plate thickness direction of the extraction member 3. The diameter of the support member through hole 301 is larger than the diameters of the second cylindrical portion 104 and the cylindrical portion 107 of the pantograph support member 1. The second cylindrical portion 104 and the cylindrical portion 107 are inserted into the support member through hole 301.

[0035] A pair of pull rod through holes 302 are formed at both longitudinal ends of the extraction member 3. Each pull rod through hole 302 penetrates the extraction member 3 in the thickness direction of the extraction member 3. The diameter of each pull rod through hole 302 is larger than the diameter of the threaded portion of the extraction bolt 201 and smaller than the diameter of the head of the extraction bolt 201. A corresponding pull rod 201 is inserted into each pull rod through hole 302.

[0036] The extraction member 3 is disposed between the head of the extraction bolt 201 and the nut 202. In other words, the head of the extraction bolt 201 is disposed facing the surface of the extraction member 3 opposite to the nut 202 side. When the extraction member 3 moves in the extraction direction D1a, the head of each extraction bolt 201 is hooked on the extraction member 3, and the pair of extraction rods 2 moves in a direction away from the drive shaft 6 in the axial direction D1.

[0037] The pantograph device 4 is provided across the pantograph support member 1 and the extraction member 3. The pantograph device 4 includes a rotating shaft 401, a pair of first link members 402, a first pushing member 403, a pair of second link members 404, and a second pushing member 405.

[0038] The rotation shaft 401 is provided on the support portion 108 of the pantograph support member 1. The rotation shaft 401 is disposed so as to extend in a direction perpendicular to the axial direction D1.

[0039] The pair of first link members 402 are arranged spaced apart from each other in the axial direction of the rotating shaft 401. The pair of first link members 402 are arranged facing each other in the axial direction of the rotating shaft 401. The pantograph support member 1 and the extraction member 3 are arranged between the pair of first link members 402.

[0040] Each of the first link members 402 is formed in the shape of a long plate. A rotation shaft 401 is attached to the middle portion in the longitudinal direction of each of the first link members 402. Each of the first link members 402 is rotatable around the rotation shaft 401.

[0041] The first pushing member 403 is formed in a cylindrical shape. The first pushing member 403 is provided across one end of each first link member 402 in the longitudinal direction. The first pushing member 403 is arranged closer to the fixed part 101 than the pull-out member 3 in the axial direction D1. When each first link member 402 rotates around the rotation shaft 401, the first pushing member 403 moves in the axial direction D1.

[0042] The pair of second link members 404 are arranged spaced apart from each other in the axial direction of the rotating shaft 401. The pair of second link members 404 are arranged facing each other in the axial direction of the rotating shaft 401. The pantograph support member 1 and the extraction member 3 are arranged between the pair of second link members 404.

[0043] Each second link member 404 is formed in the shape of a long plate. A rotation shaft 401 is attached to the middle portion in the longitudinal direction of each second link member 404. Each second link member 404 is rotatable around the rotation shaft 401.

[0044] The second pushing member 405 is formed in a cylindrical shape. The second pushing member 405 is provided across one end of each second link member 404 in the longitudinal direction. The second pushing member 405 is arranged closer to the fixed part 101 than the pull-out member 3 in the axial direction D1. When each second link member 404 rotates around the rotation shaft 401, the second pushing member 405 moves in the axial direction D1.

[0045] The first pushing member 403 is disposed on one side of the rotating shaft 401 in the longitudinal direction of the pulling member 3, and the second pushing member 405 is disposed on the other side of the rotating shaft 401 in the longitudinal direction of the pulling member 3.

[0046] The first pushing member 403 and the second pushing member 405 move in the axial direction D1 as the first link member 402 and the second link member 404 rotate. The first pushing member 403 and the second pushing member 405 move in the axial direction D1 as the first pushing member 403 and the second pushing member 405 move in the axial direction D1, causing the pantograph device 4 to expand and contract in the axial direction D1.

[0047] Specifically, the first link member 402 rotates so that the first pushing member 403 moves in the pulling-out direction D1a, and the second link member 404 rotates so that the second pushing member 405 moves in the pulling-out direction D1a, thereby contracting the pantograph device 4 in the axial direction D1. As the pantograph device 4 contracts in the axial direction D1, each of the first pushing member 403 and the second pushing member 405 applies a force to the pulling-out member 3 in the pulling-out direction D1a.

[0048] The link member rotating device 5 is provided across the first link member 402 and the second link member 404. The link member rotating device 5 includes a guide member 501, a rotating shaft 502, a pair of third link members 503, a first connecting shaft 504, a pair of fourth link members 505, and a second connecting shaft 506.

[0049] The guide member 501 is attached to the support portion 108 of the pantograph support body 102. The guide member 501 includes a cylindrical portion 507 and a support portion 508. The cylindrical portion 507 is attached to the support portion 108. The support portion 508 is provided on the pull-out direction D1a side of the cylindrical portion 507. The cylindrical portion 507 and the support portion 508 are arranged side by side in a straight line along the axis of the drive shaft 6. The cylindrical portion 507 and the support portion 508 are formed integrally with each other.

[0050] The cylindrical portion 507 is formed in a cylindrical shape. The support portion 508 is formed in a rectangular prism shape. When viewed along the axial direction D1, the height and width dimensions of the support portion 508 are larger than the diameter of the cylindrical portion 507.

[0051] The cylindrical portion 507 is inserted into the insertion hole 110. With the cylindrical portion 507 inserted into the insertion hole 110, the cylindrical portion 507 is movable in the axial direction D1. When the cylindrical portion 507 moves in the axial direction D1, the distance between the support portion 108 and the support portion 508 changes.

[0052] The rotation shaft 502 is provided on the support portion 508. The rotation shaft 502 is disposed so as to extend in a direction perpendicular to the axial direction D1. Specifically, the rotation shaft 502 is disposed parallel to the rotation shaft 401.

[0053] The pair of third link members 503 are arranged spaced apart from each other in the axial direction of the rotating shaft 502. The pair of third link members 503 are arranged facing each other in the axial direction of the rotating shaft 502. A guide member 501 is arranged between the pair of third link members 503.

[0054] Each third link member 503 is formed in the shape of a long plate. A rotation shaft 502 is attached to one end in the longitudinal direction of each third link member 503. Each third link member 503 is rotatable around the rotation shaft 502.

[0055] The first connecting shaft 504 is provided across the other end in the longitudinal direction of each of the third link members 503. Each of the third link members 503 is rotatable around the first connecting shaft 504. The first connecting shaft 504 is provided across the other end in the longitudinal direction of each of the second link members 404. Each of the second link members 404 is rotatable around the first connecting shaft 504.

[0056] When the third link member 503 rotates around the rotation shaft 502 , the second link member 404 rotates around the rotation shaft 401 .

[0057] The pair of fourth link members 505 are arranged spaced apart from each other in the axial direction of the rotating shaft 502. The pair of fourth link members 505 are arranged facing each other in the axial direction of the rotating shaft 502. A guide member 501 is arranged between the pair of fourth link members 505.

[0058] Each fourth link member 505 is formed in the shape of a long plate. A rotation shaft 502 is attached to one end of each fourth link member 505 in the longitudinal direction. Each fourth link member 505 is rotatable around the rotation shaft 502.

[0059] The second connecting shaft 506 is provided across the other end in the longitudinal direction of each of the fourth link members 505. Each of the fourth link members 505 is rotatable around the second connecting shaft 506. The second connecting shaft 506 is provided across the other end in the longitudinal direction of each of the first link members 402. Each of the first link members 402 is rotatable around the second connecting shaft 506.

[0060] When the fourth link member 505 rotates around the rotation shaft 502 , the first link member 402 rotates around the rotation shaft 401 .

[0061] Fig. 6 is a front view showing a state in which the pantograph device 4 of Fig. 1 is contracted in the axial direction D1. The link member rotating device 5 is operated via a hammer 9. Specifically, the link member rotating device 5 is operated by using the hammer 9 to strike the support portion 508 of the guide member 501 toward the support portion 108 of the pantograph support body 102.

[0062] When the guide member 501 is operated and moves in the pressing direction D1b, the third link member 503 and the fourth link member 505 rotate about the rotation axis 502 so that the first connecting shaft 504 and the second connecting shaft 506 move away from each other. As a result, the fourth link member 505 rotates the first link member 402 so that the first pressing member 403 moves in the pulling-out direction D1a, and the third link member 503 rotates the second link member 404 so that the second pressing member 405 moves in the pulling-out direction D1a.

[0063] Therefore, when the link member rotating device 5 is operated, the link member rotating device 5 rotates the first link member 402 so that the first pushing member 403 moves in the pulling-out direction D1a. Also, when the link member rotating device 5 is operated, the link member rotating device 5 rotates the second link member 404 so that the second pushing member 405 moves in the pulling-out direction D1a.

[0064] A pantograph support member 1 is attached to a drive shaft 6, a removal member 3, a pantograph device 4, and a link member rotating device 5 are attached to the pantograph support member 1, and a pair of removal rods 2 are attached across the brake wheel 7 and the removal member 3. This eliminates the need for an operator to hold a brake wheel removal jig when removing the brake wheel 7 from the drive shaft 6.

[0065] A gap T1 is provided between the nut 8-side end face of the inner cylindrical portion of the brake wheel 7 and the brake wheel flange-side end face of the fixing portion 101. When the brake wheel 7 is released from its position on the drive shaft 6, the brake wheel 7 moves in the extraction direction D1a by the gap T1, and then the brake wheel 7 comes into contact with the fixing portion 101, restricting further movement.

[0066] Next, a procedure for attaching the brake wheel removal jig according to the first embodiment to the drive shaft 6 and the brake wheel 7 will be described. Figure 7 is a front view showing the drive shaft 6 and the brake wheel 7 before the brake wheel removal jig according to the first embodiment is attached. First, the nut 8 is rotated in the circumferential direction to remove the nut 8 from the drive shaft 6.

[0067] Fig. 8 is a front view showing the state in which the fixing part 101 is attached to the drive shaft 6 of Fig. 7. After the nut 8 is removed from the drive shaft 6, the drive shaft 6 is inserted into the insertion hole 106 of the first cylindrical part 103, and the fixing part 101 is fixed to the drive shaft 6.

[0068] 9 is a front view showing the pantograph device 4 of FIG. 1 in an extended state. After the fixing portion 101 is fixed to the drive shaft 6, the pantograph device 4 is extended in the axial direction D1. At this time, the dimension T2 between the first pushing member 403 and the second pushing member 405 and the pantograph support body 102 in the axial direction D1 is made larger than the dimension of the extraction member 3 in the plate thickness direction.

[0069] 9 is a front view showing a state in which the extraction member 3 is disposed between the first and second pushing members 403 and 405 and the pantograph support body 102. After the pantograph device 4 is extended in the axial direction D1, the extraction member 3 is disposed between the first and second pushing members 403 and 405 and the pantograph support body 102.

[0070] 11 is a front view showing a state in which the pantograph support body 102 is inserted into the support member through hole 301 of the extraction member 3 of FIG. 10. After the extraction member 3 is placed between the first pushing member 403 and the second pushing member 405 and the pantograph support body 102, the columnar portion 107 of the pantograph support body 102 is inserted into the support member through hole 301 of the extraction member 3. In addition, the pantograph device 4 is contracted in the axial direction D1 to bring the first pushing member 403 and the second pushing member 405 into contact with the extraction member 3.

[0071] Fig. 12 is a front view showing a state in which the pantograph support body 102 of Fig. 11 is attached to the fixed part 101 of Fig. 8. After inserting the cylindrical part 107 of the pantograph support body 102 into the support member through-hole 301 of the extraction member 3, the third cylindrical part 105 of the fixed part 101 is inserted into the insertion hole 109 of the cylindrical part 107, and the pantograph support body 102 is attached to the fixed part 101.

[0072] 13 is a front view showing a state in which a pair of extraction rods 2 are attached across the extraction member 3 and brake wheel 7 of FIG. 12. After the pantograph support body 102 is attached to the fixing part 101, the pair of extraction rods 2 are attached across the extraction member 3 and brake wheel 7. This completes the procedure for attaching the brake wheel extraction jig according to the first embodiment to the drive shaft 6 and the brake wheel 7.

[0073] The fixed part 101 is attached to the drive shaft 6, and the pantograph support body 102 and the extraction member 3 are attached to each other. Then, the pantograph support body 102 is attached to the fixed part 101, and a pair of extraction rods 2 is attached across the extraction member 3 and the brake wheel 7. This eliminates the need for workers to carry heavy objects when assembling the brake wheel extraction jig.

[0074] Next, a brake wheel removal jig of the first comparative example will be described. FIG. 14 is a front view showing the brake wheel removal jig of the first comparative example. The brake wheel removal jig of the first comparative example includes a removal base plate 1A, a set screw 2A, and a pair of claw members 3A. A threaded hole 11A is formed in the removal base plate 1A. The set screw 2A is inserted into the threaded hole 11A formed in the removal base plate 1A. The pair of claw members 3A are rotatably supported on the removal base plate 1A. Each of the claw members 3A is hooked onto the peripheral edge of the brake wheel 7. With each of the claw members 3A hooked onto the peripheral edge of the brake wheel 7, the set screw 2A moves toward the brake wheel 7 relative to the removal base plate 1A and presses the drive shaft 6, thereby removing the brake wheel 7 from the drive shaft 6.

[0075] In the brake wheel removal jig of the first comparative example, each of the claw members 3A is hooked onto the peripheral edge of the brake wheel 7, causing each of the claw members 3A to come into contact with the outer peripheral surface of the brake wheel 7. When the claw members 3A come into contact with the outer peripheral surface of the brake wheel 7, there is a possibility that the outer peripheral surface of the brake wheel 7 will be damaged. Because the outer peripheral surface of the brake wheel 7 is used as the braking surface, damage to the outer peripheral surface of the brake wheel 7 will also result in damage to the braking surface of the brake wheel 7. Furthermore, in the brake wheel removal jig of the first comparative example, when the set screw 2A presses the drive shaft 6, the set screw 2A must rotate. In order to prevent the brake wheel 7 from rotating as the set screw 2A rotates, it is necessary to attach an anti-rotation device to the brake wheel 7.

[0076] On the other hand, in the brake wheel removal jig according to the first embodiment, the removal rod 2 passes through the through-hole 705 of the brake wheel 7, and the removal rod 2 is hung on the brake wheel 7. This makes it possible to prevent damage to the outer peripheral surface of the brake wheel 7. Furthermore, in the brake wheel removal jig according to the first embodiment, the brake wheel 7 does not rotate when it is removed from the drive shaft 6. This eliminates the need to attach an anti-rotation device to the brake wheel 7.

[0077] Next, a brake wheel extraction jig of the second comparative example will be described. FIG. 15 is a front view showing the brake wheel extraction jig of the second comparative example. The brake wheel extraction jig of the second comparative example includes a extraction base plate 1B, a push screw 2B, a pair of connecting mechanisms 3B, and a pair of extraction rods 4B. A threaded hole 11B is formed in the extraction base plate 1B. The push screw 2B is inserted into the threaded hole 11B formed in the extraction base plate 1B. The pair of connecting mechanisms 3B connects the corresponding one of the pair of extraction rods 4B to the extraction base plate 1B. The pair of extraction rods 4B are inserted one by one into a pair of through holes 705 formed in the brake wheel 7 and are engaged with the brake wheel 7. With each extraction rod 4B inserted into the corresponding through hole 705 and engaged with the brake wheel 7, the push screw 2B moves toward the brake wheel 7 relative to the extraction base plate 1B, pushing the drive shaft 6 and extracting the brake wheel 7 from the drive shaft 6.

[0078] In the brake wheel removal jig of the second comparative example, each connecting mechanism 3B includes a first connecting piece 31B, a second connecting piece 32B, and a third connecting piece 33B. The first connecting piece 31B is connected to the removal rod 4B. The second connecting piece 32B is connected to the removal base plate 1B. The third connecting piece 33B is connected to the first connecting piece 31B and the second connecting piece 32B. Like the removal rod 4B, the first connecting piece 31B is arranged along the axis of the drive shaft 6. The third connecting piece 33B is arranged at an angle relative to the first connecting piece 31B. The angle of the third connecting piece 33B relative to the first connecting piece 31B is adjusted depending on the radial size of the brake wheel 7.

[0079] 16 is a front view showing a state in which the angle of the third connecting piece 33B relative to the first connecting piece 31B in FIG. 15 has changed. In the brake wheel extraction jig of the second comparative example, if the force with which the set screw 2B presses the drive shaft 6 is large, the angle of the third connecting piece 33B relative to the first connecting piece 31B may change while the set screw 2B is pressing the drive shaft 6. If the angle of the third connecting piece 33B relative to the first connecting piece 31B changes while the set screw 2B is pressing the drive shaft 6, the first connecting piece 31B may become inclined with respect to the axis of the drive shaft 6, and the extraction rod 4B may be bent.

[0080] On the other hand, in the brake wheel extraction jig according to the first embodiment, the pantograph device 4 contracts, causing the pantograph device 4 to move the extraction member 3 in the extraction direction D1a, and the extraction member 3 moves the extraction bar 2 in the extraction direction D1a. This makes it possible to prevent the extraction bar 2 from being bent.

[0081] As described above, the brake wheel extraction jig according to the first embodiment includes the pantograph support member 1, the pair of extraction rods 2, the extraction member 3, and the pantograph device 4. The pantograph support member 1 is attached to the drive shaft 6. The pair of extraction rods 2 are respectively attached to a pair of through holes 705 formed in the brake wheel 7. The extraction member 3 is attached across the pair of extraction rods 2. As the extraction member 3 moves in the extraction direction D1a, the extraction member 3 moves each of the pair of extraction rods 2 in the extraction direction D1a. The pantograph device 4 is attached across the pantograph support member 1 and the extraction member 3. The pantograph device 4 expands and contracts in the axial direction D1. As the pantograph device 4 contracts, the pantograph device 4 moves the extraction member 3 in the extraction direction D1a, and the extraction member 3 moves each of the multiple extraction rods 2 in the extraction direction D1a. This configuration makes it possible to prevent the removal rod 2 from being bent even when a large force is applied to remove the brake wheel 7 from the drive shaft 6. This allows the brake wheel 7 to be more reliably removed from the drive shaft 6. Furthermore, this configuration prevents the brake wheel 7 from rotating when it is removed from the drive shaft 6. This makes it possible to eliminate the need for a rotation prevention device.

[0082] Furthermore, in the brake wheel extraction jig according to the first embodiment, the pantograph device 4 has a rotating shaft 401, a first link member 402, a first pushing member 403, a second link member 404, and a second pushing member 405. The rotating shaft 401 is provided on the pantograph support member 1. The first link member 402 is provided rotatably about the rotating shaft 401. The first pushing member 403 is provided on the first link member 402. As the first link member 402 rotates, the first pushing member 403 moves in the axial direction D1. The second link member 404 is provided rotatably about the rotating shaft 401. The second pushing member 405 is provided on the second link member 404. As the second link member 404 rotates, the second pushing member 405 moves in the axial direction D1. The first link member 402 rotates so that the first pushing member 403 moves in the pulling-out direction D1a, and the second link member 404 rotates so that the second pushing member 405 moves in the pulling-out direction D1a, thereby contracting the pantograph device 4. As the pantograph device 4 contracts, each of the first pushing member 403 and the second pushing member 405 applies a force in the pulling-out direction D1a to the pulling-out member 3. With this configuration, the pantograph device 4 can be easily configured.

[0083] The brake wheel extraction jig according to the first embodiment also includes a link member rotation device 5 that is provided across the first link member 402 and the second link member 404. By operating the link member rotation device 5, the first link member 402 is rotated so that the first pushing member 403 moves in the extraction direction D1a, and the second link member 404 is rotated so that the second pushing member 405 moves in the extraction direction D1a. With this configuration, the pantograph device 4 can be easily contracted.

[0084] Furthermore, in the brake wheel extraction jig according to the first embodiment, the link member rotation device 5 has a guide member 501, a third link member 503, and a fourth link member 505. The guide member 501 moves in the axial direction D1 relative to the pantograph support member 1. The third link member 503 is provided across the second link member 404 and the guide member 501. The fourth link member 505 is provided across the first link member 402 and the guide member 501. When the guide member 501 is operated to move the guide member 501 in the pressing direction D1b, the fourth link member 505 rotates the first link member 402 so that the first pressing member 403 moves in the extraction direction D1a. When the guide member 501 is operated to move the guide member 501 in the pressing direction D1b, the third link member 503 rotates the second link member 404 so that the second pressing member 405 moves in the extraction direction D1a. According to this configuration, the link member rotating device 5 can be configured simply.

[0085] Furthermore, in the brake pulley removal jig according to the first embodiment, the pantograph support member 1 has a fixing portion 101 fixed to the drive shaft 6. The fixing portion 101 restricts the movement of the brake pulley 7 in the removal direction D1a when the brake pulley 7 is released from the drive shaft 6. This configuration makes it possible to prevent the brake pulley 7 from falling off the drive shaft 6 when the brake pulley 7 is released from the drive shaft 6.

[0086] Embodiment 2 Figure 17 is a front view showing the brake wheel removal jig according to embodiment 2. Figure 18 is a right side view showing the brake wheel removal jig of Figure 17. In the brake wheel removal jig according to embodiment 2, the link member rotation device 5 includes a screw member 10 provided across the first link member 402 and the second link member 404.

[0087] The screw member 10 is connected to the first link member 402 via a second connecting shaft 506 and is connected to the second link member 404 via a first connecting shaft 504 .

[0088] When the screw member 10 is operated and rotated, the third link member 503 and the fourth link member 505 rotate about the rotation axis 502 so that the first connecting shaft 504 and the second connecting shaft 506 move away from each other. As a result, the screw member 10 rotates the first link member 402 so that the first pushing member 403 moves in the pull-out direction D1a, and the screw member 10 rotates the second link member 404 so that the second pushing member 405 moves in the pull-out direction D1a.

[0089] Other configurations of the brake wheel removal jig according to the second embodiment are the same as those of the brake wheel removal jig according to the first embodiment.

[0090] As described above, in the brake wheel extraction jig according to the second embodiment, the link member rotating device 5 includes the screw member 10 provided across the first link member 402 and the second link member 404. When the screw member 10 is operated and rotated, the screw member 10 rotates the first link member 402 so that the first pushing member 403 moves in the extraction direction D1a. Furthermore, when the screw member 10 is operated and rotated, the screw member 10 rotates the second link member 404 so that the second pushing member 405 moves in the extraction direction D1a. This configuration allows the link member rotating device 5 to be easily configured. Furthermore, this configuration allows the link member rotating device 5 to be operated without using the hammer 9 to strike the support portion 508 of the guide member 501 toward the support portion 108. This allows the link member rotating device 5 to be operated even when there is no space around the support portion 508 to accommodate the hammer 9.

[0091] The brake pulley extraction jig according to each embodiment has been described as being configured to be used when extracting the brake pulley 7 from the drive shaft 6 of an elevator hoist. However, this configuration is not limiting. The brake pulley extraction jig according to each embodiment can also be used when extracting the brake pulley 7 from a drive shaft 6 other than that of an elevator hoist.

[0092] Furthermore, in the brake wheel removal jig according to each embodiment, the configuration of the brake wheel removal jig has been described as including one type of removal member 3. However, this configuration is not limited to this. The brake wheel removal jig may be configured to include multiple types of removal members 3. Figure 19 is a configuration diagram showing three types of removal members 3. The longitudinal dimensions of the removal members 3 shown in Figures 19(a), 19(b), and 19(c) are different from one another. One removal member 3 can be selected from the multiple removal members 3 to correspond to the diameter of the brake wheel 7.

[0093] Furthermore, in the brake wheel removal jig according to each embodiment, the pantograph support member 1 has been described as having one type of fixing portion 101. However, this configuration is not limited thereto. The pantograph support member 1 may have multiple types of fixing portions 101. FIG. 20 is a configuration diagram showing three types of fixing portions 101. The first cylindrical portions 103 of the fixing portions 101 shown in FIGS. 20(a), 20(b), and 20(c) have different radial dimensions D2. The insertion holes 106 of the first cylindrical portions 103 shown in FIGS. 20(a), 20(b), and 20(c) have different radial dimensions D2. One fixing portion 101 can be selected from the multiple fixing portions 101 depending on the diameter of the drive shaft 6.

[0094] Although the brake wheel removal jigs according to the preferred embodiments have been described above, the present invention is not limited to the brake wheel removal jigs according to the above-described embodiments. Various modifications and alterations can be made to the brake wheel removal jigs according to the above-described embodiments without departing from the scope of the claims. [Explanation of symbols]

[0095] 1 Pantograph support member, 2 Pull-out rod, 3 Pull-out member, 4 Pantograph device, 5 Link member rotation device, 6 Drive shaft, 7 Brake wheel, 8 Nut, 9 Hammer, 10 Screw member, 101 Fixing portion, 102 Pantograph support body, 103 First cylindrical portion, 104 Second cylindrical portion, 105 Third cylindrical portion, 106 Insertion hole, 107 Cylindrical portion, 108 Support portion, 109 Insertion hole, 110 Insertion hole, 201 Pull-out bolt, 202 Nut, 203 Washer, 301 Support member through hole, 302 Pull-out rod through hole, 401 Rotating shaft, 402 First link member, 403 First pushing member, 404 Second link member, 405 Second pushing member, 501 Guide member, 502 Rotating shaft, 503 Third link member, 504 First connecting shaft, 505 fourth link member, 506 second connecting shaft, 507 cylindrical portion, 508 support portion, 601 thread groove, 701 inner cylindrical portion, 702 flange portion, 703 outer cylindrical portion, 704 through hole, 705 through hole.

Claims

1. a pantograph support member provided on the drive shaft; a pair of pull rods provided in a pair of through holes formed in the brake wheel, one for each; an extraction member provided across the pair of extraction rods, and moving in an extraction direction along the axis of the drive shaft, in which the brake wheel is extracted from the drive shaft, thereby moving each of the pair of extraction rods in the extraction direction; a pantograph device provided across the pantograph support member and the extraction member, and extending and contracting in a direction along the axis of the drive shaft; Equipped with A brake wheel extraction jig in which the pantograph device contracts, causing the pantograph device to move the extraction member in the extraction direction, and the extraction member moves each of the pair of extraction rods in the extraction direction.

2. The pantograph device a rotation shaft provided on the pantograph support member; a first link member provided rotatably around the rotation axis; a first pressing member provided on the first link member and moving in a direction along the axis of the drive shaft as the first link member rotates; a second link member provided rotatably around the rotation axis; a second pressing member provided on the second link member and moving in a direction along the axis of the drive shaft as the second link member rotates; and 2. The brake wheel removal jig according to claim 1, wherein the first link member rotates so that the first pushing member moves in the removal direction, and the second link member rotates so that the second pushing member moves in the removal direction, thereby contracting the pantograph device and causing each of the first pushing member and the second pushing member to apply a force in the removal direction to the removal member.

3. a link member rotation device provided across the first link member and the second link member; 3. The brake wheel removal jig according to claim 2, wherein, when the link member rotation device is operated, the first link member is rotated so that the first pushing member moves in the removal direction, and the second link member is rotated so that the second pushing member moves in the removal direction.

4. The link member rotating device is a guide member that moves relative to the pantograph support member in a direction along the axis of the drive shaft; a third link member provided across the second link member and the guide member; a fourth link member provided across the first link member and the guide member; and 4. The brake wheel removal jig according to claim 3, wherein the guide member is operated to move in a pressing direction that is a direction along the axis of the drive shaft and opposite to the removal direction, such that the third link member rotates the second link member so that the first pushing member moves in the removal direction, and the fourth link member rotates the first link member so that the second pushing member moves in the removal direction.

5. the link member rotation device has a screw member provided across the first link member and the second link member, 4. The brake wheel removal jig according to claim 3, wherein, when the screw member is operated and rotated, the screw member rotates the first link member so that the first pushing member moves in the removal direction, and the screw member rotates the second link member so that the second pushing member moves in the removal direction.

6. the pantograph support member has a fixing portion fixed to the drive shaft, 6. The brake wheel removal jig according to claim 1, wherein the fixing portion restricts movement of the brake wheel in the removal direction when the brake wheel is released from fixation to the drive shaft.

Images