Brake pad insertion / extraction assistance tool and brake pad insertion / extraction method for traction machine brake device

Abstract

A brake pad insertion / extraction aid is provided with: a main body section in which a first flat surface section and a second flat surface section are connected so as to form an L-shape in a cross section perpendicular to the longitudinal direction; the two long screws for pulling out are respectively screwed with the threaded hole parts; and two pull-out nuts which are respectively screwed with the two long screws. The first planar portion has two through-holes formed so as to have a diameter larger than the outer diameter of the extraction long screw. In the pull-out operation of the pair of brake pads, each of the two pull-out long screws is configured such that one end of each of the two pull-out long screws is screwed into the threaded hole portion of each of the pair of brake pads in a state of penetrating through each of the two through holes. The two pull-out nuts are configured so as to be screwed between the other ends of the two pull-out long screws and the main body.

Description

Technical Field

[0001] The present disclosure relates to a technology for removing or inserting a brake pad of a brake device mounted on an elevator hoisting machine. Background Art

[0002] Patent document 1 discloses an auxiliary tool capable of inserting and removing a brake pad. The auxiliary tool comprises a main body of a groove-shaped cross-section component with a flange, a long screw and a nut. The end of the long screw is connected to the brake pad. The flange of the main body is brought into contact with the outer surface of the housing, and the nut screwed into the long screw is rotated to pull the brake pad out of the interior of the brake device.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-168866 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The auxiliary tool of Patent Document 1 needs to remove the pair of brake pads inserted into the brake device one by one in sequence. Such repeated removal work may cause a burden on the operator.

[0008] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a brake pad insertion and extraction auxiliary tool and a brake pad insertion and extraction method for assisting the work of removing or inserting a brake pad mounted on a brake device of a hoisting machine.

[0009] Means for solving problems

[0010] The present disclosure is applied to the following brake pad insertion and extraction auxiliary tool, which is used when a pair of brake pads arranged in the internal space are extracted or inserted from an opening portion connected to the internal space of the brake device of the elevator traction machine. The pair of brake pads are respectively provided with threaded hole portions on the front portions facing the opening portion. The brake pad insertion and extraction auxiliary tool comprises: a main body, a first plane portion and a second plane portion of which are connected in an L-shaped manner in a cross section perpendicular to the long side direction; two long extraction screws, which are respectively screwed into the threaded hole portions; and two extraction nuts, which are respectively screwed into the two long screws. The first plane portion has two through holes formed with a diameter larger than the outer diameter of the long extraction screws. In the extraction operation of the pair of brake pads, the two long extraction screws are respectively configured so that one end is screwed into the threaded hole portion respectively in a state of respectively passing through the two through holes, and the two extraction nuts are configured so as to be respectively screwed between the other end of each of the two long extraction screws and the main body.

[0011] In addition, the present disclosure is applied to the following brake pad insertion and extraction method, which uses the above-mentioned brake pad insertion and extraction auxiliary tool to extract a pair of brake pads set in the internal space from the opening portion connected to the internal space of the brake device of the elevator traction machine. The brake pad insertion and extraction method includes: a process of screwing two extraction nuts with two extraction long screws respectively; a first setting process, which is to arrange the main body on the outer side of the opening portion, make the two extraction long screws pass through the two through holes respectively, and make one end of the two extraction long screws screwed with the threaded hole portion respectively; and a process of tightening the two extraction nuts.

[0012] In addition, in the above-mentioned brake pad insertion and extraction auxiliary tool, the second plane portion has a pair of insertion threaded holes arranged in a row along the long side direction. The brake pad insertion and extraction auxiliary tool has a pair of long insertion screws, and the pair of long insertion screws have heads at one end side and are screwed into the insertion threaded holes at the other end side. During the insertion operation of the brake pad, the main body is arranged in the internal space at a position where the second plane portion contacts the inner side surface of the opening portion, and the other end side of the pair of long insertion screws screwed into the insertion threaded holes contacts the front side of the brake pad. A brake pad insertion and removal method for inserting a brake pad into an installation position from an opening portion connected to the internal space of a brake device of an elevator traction machine using the brake pad insertion and removal auxiliary tool includes: a process of arranging the brake pad at a position in the internal space that is closer to the installation position in the insertion direction; a second setting process, in the internal space, arranging the main body at a position where the second plane portion contacts the inner side surface of the opening portion and the other end side of a pair of long insertion screws screwed into the insertion threaded hole portion contacts the front side of the brake pad; and a process of tightening the pair of long insertion screws.

[0013] Effects of the Invention

[0014] According to the technology of the brake pad insertion and extraction auxiliary tool disclosed in the present invention, a pair of left and right brake pads can be extracted at one time with a small force, thereby reducing the burden on the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view showing the external appearance structure of a braking device to which the insertion and extraction assisting tool according to the embodiment is applied.

[0016] Figure 2 This is a diagram showing the brake device as viewed from the front side of the opening.

[0017] Figure 3 It is a diagram for explaining the component structure of the brake pad insertion and extraction auxiliary tool.

[0018] Figure 4 This is a perspective view of the main body of the insertion and extraction assisting tool as viewed from the back side of the first flat surface portion.

[0019] Figure 5 This is a perspective view of the main body of the insertion and extraction assisting tool as viewed from the front side of the second flat surface portion.

[0020] Figure 6 It is a diagram for explaining the installation process of the brake pad insertion and extraction auxiliary tool in the extraction work.

[0021] Figure 7 It is a diagram for explaining the installation process of the brake pad insertion and extraction auxiliary tool in the extraction work.

[0022] Figure 8 This is a schematic diagram showing a brake pad insertion and extraction auxiliary tool installed in the installation process, with the housing body cut off in a horizontal plane and viewed from above.

[0023] Fig. 9 It is a diagram for explaining the brake pad removal process in the removal work.

[0024] Fig.10 It is a view for explaining the installation process of the brake pad insertion and extraction auxiliary tool in the brake pad insertion operation.

[0025] Fig.11 This is a schematic diagram showing the brake pad insertion and extraction auxiliary tool installed in the installation process, cut through the housing body along a vertical plane parallel to the insertion direction and viewed from the left side. DETAILED DESCRIPTION

[0026] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the same reference numerals are given to the common elements in each figure, and the repeated description is omitted.

[0027] Implementation method.

[0028] 1. Appearance and structure of the brake device

[0029] Figure 1 1 is a perspective view showing the appearance structure of a brake device of an insertion and extraction auxiliary tool according to an embodiment of the present invention. The brake device 10 shown in the figure is a disc brake device mounted on a traction machine of an elevator. The brake device 10 includes a housing body 12 and a brake disc 14. An internal space 16 is formed in the housing body 12. The internal space 16 is connected to the external space through a rectangular opening 18.

[0030] Figure 2 1 is a diagram of the brake device as viewed from the front side of the opening. In addition, in the internal space 16 of the brake device 10, a pair of brake pads 20 and 22 are inserted on the left and right sides of the brake disc 14, respectively. In addition, in the internal space 16 of the brake device 10, in addition to the pair of brake pads 20 and 22, a plurality of components are installed. Figure 2 Illustration omitted.

[0031] The pair of brake pads 20, 22 are configured to be able to be removed and inserted through the opening 18. In the following description, the direction in which the pair of brake pads 20, 22 are removed from the brake device 10 is referred to as the "removal direction", and the direction opposite to the removal direction is referred to as the "insertion direction". Figure 2 The up-down direction and the left-right direction when the opening 18 of the brake device 10 is viewed from the front are defined as the up-down direction and the left-right direction of the brake device 10. The front portions 20a and 22a of the brake pads 20 and 22 facing the opening are provided with screw holes 201 and 221 for extraction, respectively. The screw diameter of the screw holes 201 and 221 is, for example, M8.

[0032] 2. Structure of brake pad insertion and removal auxiliary tool for elevator traction machine according to the embodiment

[0033] The brake device 10 of the hoisting machine of the elevator is regularly inspected by the operator. The replacement parts during the inspection may include, for example, a pair of brake pads 20 and 22. In the replacement operation of the pair of brake pads 20 and 22, the bolts are usually screwed into the threaded hole portions 201 and 221, and the brake pads are pulled out together with the bolts. However, there are cases where it is difficult to pull out the firmly fitted brake pads 20 and 22, and it may become a heavy operation for the operator.

[0034] The brake pad insertion and extraction auxiliary tool of the present embodiment is used during maintenance work of such a brake device 10 , and is a tool that assists the work of extracting the pair of brake pads 20 , 22 . Figure 3 The diagram is for explaining the component structure of the brake pad insertion and extraction auxiliary tool. The insertion and extraction auxiliary tool includes a main body 30 , two long extraction screws 32 , two extraction nuts 34 , two flat washers 36 , two long insertion screws 38 , and four nuts 40 .

[0035] The main body 30 is an L-shaped cross-section angle material in which the first plane portion 301 and the second plane portion 302 are connected in an L-shaped manner in a cross section perpendicular to the long side direction. In the following description, the surface on the side where the plane angle between the first plane portion 301 and the second plane portion 302 is 90 degrees is defined as the back surface, and the surface on the side where the plane angle is 270 degrees is defined as the front surface.

[0036] Two through holes 303 are formed in the first planar portion 301 along the longitudinal direction. Figure 4This is a stereoscopic view of the main body of the plug-in / pull-out auxiliary tool as viewed from the back side of the first plane portion. The spacing between the two through holes 303 is the same spacing as the spacing between the threaded hole portions 201, 221 of the pair of brake pads 20, 22 mounted on the brake device 10. For example, the two through holes 303 are formed at positions 30 mm away from the center of the long side direction of the first plane portion 301 toward the end. The aperture of the two through holes 303 is larger than the outer diameter of the long screw 32 for extraction. For example, when the thread diameter of the long screw 32 for extraction is M8, the aperture diameter φ of the two through holes 303 is 10 mm to 12 mm.

[0037] A guide label portion 309 is attached to the back side of the first plane portion 301 for guiding when removing the brake pads 20, 22. The guide label portion 309 here is marked with a mark of "pad removal side" and an arrow mark indicating the direction from the base end side to the terminal side in the short side direction of the first plane portion 301. The shape, number, and arrangement of the guide label portion 309 are not limited. For example, the guide label portion 309 can also be configured as a single label. Chamfered portions 310 are formed at the corners of both ends in the long side direction of the first plane portion 301. The shape and size of the chamfered portion 310 are not limited.

[0038] A positioning through hole 304 and two insertion screw hole portions 305 are formed in the second flat surface portion 302 . Figure 5 3D view of the main body of the plugging and unplugging auxiliary tool as viewed from the front side of the second plane portion. The positioning through hole 304 is formed in the central portion of the second plane portion 302 in the long side direction. The aperture of the positioning through hole 304 is larger than the outer diameter of the long screw 32 for extraction. For example, when the thread diameter of the long screw 32 for extraction is M8, the aperture φ of the positioning through hole 304 is 10 mm. In addition, the positioning through hole 304 is not a necessary structure.

[0039] Two insertion threaded hole portions 305 are respectively formed on both sides of the long side direction with the positioning through hole 304 sandwiched therebetween. The two insertion threaded hole portions 305 are formed, for example, by forming a through hole in the second plane portion 302 and welding a nut from the front side at the position of the through hole. The thread diameter of the insertion threaded hole portion 305 is a thread diameter that the insertion long screw 38 can be screwed into. For example, in the case where the insertion long screw 38 is an M10 screw, the thread diameter of the insertion long screw 38 is M10. The spacing between the two insertion threaded hole portions 305 is set to a width smaller than the width dimension of the brake pad 20 installed on the brake device 10 in the up-down direction. For example, the two insertion threaded hole portions 305 are formed at positions 40 mm away from the center of the long side direction toward the end.

[0040] Guide label portions 306 and 308 are added to the front side of the second plane portion 302 for guiding when inserting the brake pads 20 and 22. When the second plane portion 302 is arranged in the long side direction in the vertical direction with the first plane portion 301 located on the right side, the guide label portion 306 is located above the upper insertion screw hole portion 305. The guide label portion 306 here is marked with a mark "pad insertion side R" and an arrow mark indicating the direction toward the end side of the long side direction of the second plane portion 302. When the second plane portion 302 is arranged in the vertical direction with the first plane portion 301 located on the left side, the guide label portion 308 is located above the upper insertion screw hole portion 305. The guide label portion 308 here is marked with a mark "pad insertion side L" and an arrow mark indicating the direction toward the end side of the long side direction of the second plane portion 302. The shape and number of the guide label portions 309 are not limited. For example, the guide label portions 306 and 308 may be formed as one label or divided into a plurality of labels. Chamfered portions 312 are formed at the corners of both ends in the longitudinal direction of the second flat portion 302. The shape and size of the chamfered portions 312 are not limited.

[0041] The two long extraction screws 32 are configured to be respectively screwed into the threaded hole portions 201 and 221 of a pair of brake pads 20 and 22 mounted on the brake device 10. The long extraction screw 32 is, for example, a bolt having a hexagonal head. Alternatively, the long extraction screw 32 may be a full-thread bolt without a head. The long extraction screw 32 has a thread diameter that can pass through the through hole 303 of the main body 30. When the hole diameter φ of the through hole 303 is 10 mm, the thread diameter of the long extraction screw 32 is, for example, M8. The long extraction screw 32 has a length that protrudes from the opening portion 18 toward the outer side surface of the housing body 12 when screwed into the threaded hole portions 201 and 221 of a pair of brake pads 20 and 22 mounted on the brake device 10.

[0042] The two extraction nuts 34 are nuts that can be screwed together with the two extraction long screws 32. The two flat washers 36 are washers through which the two extraction long screws 32 pass. The two extraction long screws 32 pass through the two through holes 303 of the main body 30 from the back side while being screwed together with the two extraction nuts 34 and passing through the two flat washers 36.

[0043] The two long insertion screws 38 are, for example, full-thread bolts without heads. The two long insertion screws 38 are configured to be screwed into the two insertion threaded hole portions 305 of the main body 30, respectively. A set of nuts 40 are screwed tightly into one end of the long insertion screw 38. The set of nuts 40 are fixed to the long insertion screw 38 in a non-rotatable manner by the action of the so-called double nut. That is, the set of nuts 40 functions as the head of the long insertion screw 38. In addition, the long insertion screw 38 may also be a bolt with a head. In this case, a set of nuts 40 is not required.

[0044] The long insertion screw 38 has a thread diameter capable of passing through the insertion threaded hole 305 of the main body 30. When the thread diameter of the insertion threaded hole 305 is M10, the thread diameter of the long extraction screw 32 is M10. The long insertion screw 38 has a length that protrudes from the opening 18 to the outer side surface of the housing body 12 of the brake device 10 when the brake pads 20, 22 are inserted into the brake device 10 by the insertion operation described later.

[0045] 3. Brake pad insertion and removal method using a brake pad insertion and removal aid

[0046] Next, the procedure of the brake pad removal operation and the brake pad insertion operation using the brake pad removal auxiliary tool according to the embodiment will be described in detail.

[0047] Preparation process: Disassembly process of shoe press plate, etc.

[0048] As a preliminary preparation, the operator removes the shoe presser and the like from the brake device 10. As a result, the front surfaces 20a and 22a of the pair of brake pads 20 and 22 are exposed.

[0049] First step: First step of setting the brake pad insertion and extraction auxiliary tool

[0050] Figure 6 and Figure 7 It is a diagram for explaining the installation process of the brake pad insertion and extraction auxiliary tool in the extraction work. Figure 8This is a schematic diagram of the brake pad insertion and extraction auxiliary tool installed in the installation process, which is cut in a horizontal plane and viewed from above. In the first process of the operation, the operator screws two long extraction screws 32 into the extraction nuts 34 respectively, and passes through the flat washers 36. The operator holds the main body 30 on the outside of the housing body 12 so that the long side direction of the main body 30 is the left-right direction and the arrow mark of the guide label part 309 on the back side of the first flat part 301 is facing upward. As a result, the main body 30 is held in the horizontal direction and the second flat part 302 is located below the first flat part 301. Then, the operator passes the long extraction screw 32 through the through hole 303 on the right side of the main body 30 from the back side and screws it into the threaded hole 201 of the brake pad 20. Similarly, the operator passes another long extraction screw 32 through the through hole 303 on the left side of the main body 30 from the back side and screws it into the threaded hole 221 of the brake pad 22. The main body 30 is configured such that the total length L1 in the longitudinal direction is greater than the lateral opening width W1 of the opening 18 . Therefore, both ends of the front side of the first flat surface 301 are in contact with the outer side surface 121 of the case body 12 .

[0051] Second process: extraction process

[0052] Fig. 9 1 is a diagram for explaining the brake pad removal process in the removal operation. In the second step of the operation, the operator prepares a wrench 50 that matches the size of the removal nut 34, and uses the wrench 50 to evenly screw in the left and right removal nuts 34. The wrench 50 used is not limited. Fig. 9 , a ratchet-type eyeglass wrench is shown as the wrench 50. When the extraction nut 34 is screwed in, the extraction long screw 32 moves relatively in the extraction direction. As a result, the pair of brake pads 20 and 22 connected to the extraction long screw 32 are respectively extracted in the extraction direction with a small force.

[0053] Next, a method of inserting the pair of brake pads 20 and 22 using the brake pad insertion and extraction auxiliary tool according to the embodiment will be described in detail.

[0054] The third step: brake pad preparation

[0055] In the third step of the operation, the operator arranges the pair of brake pads 20 and 22 to be newly installed at positions in the internal space 16 that are closer to the front side in the insertion direction than the installation positions.

[0056] Step 4: Second installation step of the brake pad insertion and extraction auxiliary tool

[0057] Fig.10It is a view for explaining the installation process of the brake pad insertion and extraction auxiliary tool in the brake pad insertion operation. Fig.11 This is a schematic diagram of the brake pad insertion and extraction auxiliary tool installed in the installation process, which is cut off by a vertical plane parallel to the insertion direction and viewed from the left side. In the fourth process of the operation, the operator holds the main body 30 in the internal space 16 of the shell body 12 with the arrow mark of the guide label portion 306 on the front side of the second flat surface portion 302 facing upward. As a result, the main body 30 is maintained so that the first flat surface portion 301 is located on the outer surface side of the brake pad 20. Then, the operator passes the extraction nut 34 through the positioning through hole 304 from the front side and screws it into the threaded hole portion 201 of the brake pad 20 on the right side. Next, the operator fixes a set of nuts 40 on one end side of each of the two long insertion screws 38, and screws the other end side into the two insertion threaded hole portions 305 respectively. In addition, the main body 30 is configured so that the total length L1 in the long side direction is larger than the width of the opening 18 in the vertical direction, that is, the longitudinal opening width H1. Therefore, both ends of the second flat surface portion 302 on the front side are in contact with the inner side surface 122 of the case body 12 .

[0058] Fifth step: step of inserting the brake pad 20

[0059] In the fifth step of the operation, the operator prepares a wrench that matches the size of the nut 40, and uses the wrench to evenly screw in the nuts 40 fixed to the upper and lower long insertion screws 38. The wrench used is not limited. When the nut 40 is screwed in, the long insertion screw 38 fixed to the nut 40 moves relatively in the insertion direction. The tip ends of the two long insertion screws 38 evenly press the front portion 20a of the brake pad 20 in the insertion direction. As a result, the brake pad 20 is inserted into the brake device 10 with a small force.

[0060] Step 6: Second step of setting the brake pad insertion and extraction auxiliary tool

[0061] In the sixth step of the operation, the operator holds the main body 30 on the inner space 16 side of the housing body 12 with the arrow mark of the guide label portion 308 on the front side of the second flat surface portion 302 facing upward. As a result, the main body 30 is held so that the first flat surface portion 301 is located on the outer surface side of the brake pad 20. Then, the operator passes the extraction nut 34 through the positioning through hole 304 from the front side and screws it into the threaded hole portion 221 of the left brake pad 22. Next, the operator fixes a set of nuts 40 to one end side of each of the two long insertion screws 38, and screws the other end side into the two insertion threaded hole portions 305, respectively.

[0062] Seventh step: step of inserting the brake pad 22

[0063] In the seventh step of the operation, similarly to the fifth step, the nuts 40 fixed to the upper and lower long insertion screws 38 are screwed in evenly using a wrench. Thus, the brake pad 22 is inserted into the brake device 10 with a small force. Finally, necessary components such as the shoe presser are installed.

[0064] 4. Function and effect of brake pad insertion and extraction auxiliary tools

[0065] According to the brake pad insertion and removal auxiliary tool as described above, the following operations and effects can be obtained.

[0066] The main body 30 has a shape in which the first flat surface portion 301 and the second flat surface portion 302 are connected to form an L-shape in a cross section perpendicular to the longitudinal direction. With such a shape, strength can be ensured with a simple structure.

[0067] The main body 30 is configured such that the spacing between the two through holes 303 is the same as the spacing between the threaded hole portions 201 and 221 of the pair of brake pads 20 and 22 mounted on the brake device 10. According to such a structure, when the two long extraction screws 32 are screwed into the threaded hole portions 201 and 221, respectively, the two long extraction screws 32 are parallel, so that the position of the main body 30 can be prevented from being shifted when the extraction nut 34 is screwed in.

[0068] The main body 30 is configured such that the total length L1 in the longitudinal direction is greater than the lateral opening width W1 of the opening 18. With such a configuration, when the main body 30 is disposed in front of the opening 18 with the longitudinal direction aligned with the left-right direction of the opening during the removal operation of the brake pads 20, 22, both ends of the main body 30 can be reliably brought into contact with the outer side surface 121 of the housing body 12.

[0069] In addition, the main body 30 is configured such that the entire length of the short side direction of the first flat surface portion 301 is narrower than the height of the opening 18 in the vertical direction. With such a configuration, when the main body 30 is arranged in an orientation such that the long side direction coincides with the left-right direction of the opening during the removal operation of the brake pads 20, 22, the operation can be performed while visually checking the internal space 16 from the opening 18.

[0070] The main body 30 is configured such that the total length L1 in the longitudinal direction is greater than the longitudinal opening width H1 of the opening 18. With such a configuration, when the main body 30 is arranged in the internal space 16 in an orientation such that the longitudinal direction coincides with the height direction of the opening 18 during the insertion operation of the brake pads 20, 22, both ends of the main body 30 can be reliably brought into contact with the inner side surface 122 of the housing body 12.

[0071] The main body 30 is configured such that the entire length of the second flat surface portion 302 in the short-side direction is narrower than the width of the opening 18 in the left-right direction. With such a configuration, the main body 30 can be arranged in the internal space 16 during the insertion operation of the brake pads 20, 22.

[0072] The two long extraction screws 32 have a length such that when one end is screwed into the threaded hole 201, 221 of the brake pad 20, 22 mounted on the brake device 10, the other end protrudes from the opening 18. According to such a structure, after the two long extraction screws 32 are passed through the through hole 303 of the main body 30, the extraction nut 34 can be screwed into the long extraction screw 32 to be tightened.

[0073] The flat washer is passed through the gap between the main body 30 of each of the two long extraction screws 32 and the extraction nut 34. According to such a structure, the tightening of the extraction nut 34 becomes easy.

[0074] During the removal operation of the brake pads 20 and 22, the main body 30 is arranged in an orientation such that the second flat surface portion 302 is located below the first flat surface portion 301. With such a configuration, the operator can perform the tightening operation while visually checking the removal nut 34. In addition, the operator can operate the wrench 50 at a position above the main body 30, thereby improving the work efficiency.

[0075] The main body 30 has chamfered portions 310 and 312 respectively at the corners of the first plane portion 301 and the second plane portion 302 in the short-side direction. According to such a structure, when the main body 30 is set in the internal space 16, the insertion operation into the narrow part becomes easy. In addition, it is possible to prevent the corners from being hooked on the housing body 12 and being damaged. In addition, it also has the effect of preventing the operator from being injured.

[0076] During the insertion operation of the brake pad 20, the long extraction screw 32 passes through the positioning through hole 304 and then screws into the threaded hole 201 of the brake pad 20. With such a structure, the main body 30 can be easily positioned relative to the brake pad 20. The same also applies to the insertion operation of the brake pad 22.

[0077] The two insertion threaded holes 305 are formed at positions where the distal ends of the pair of insertion long screws 38 contact the front surface 20a of the brake pad 20 when the pair of insertion long screws 38 are screwed together. According to such a structure, the brake pad 20 can be inserted to a proper position by screwing in the pair of insertion long screws 38 evenly.

[0078] A set of nuts 40 is fixed to one end of the insertion long screw 38 in the form of a so-called double nut. According to such a structure, the nut 40 on the main body 30 side functions as a limiting member to prevent the eyeglass wrench caught on the nut 40 on the end side from deviating in the insertion direction. As a result, the work efficiency of the operator who displays the nut 40 is improved.

[0079] During the insertion operation of the brake pad 20, the main body 30 is arranged on the outer surface side of the brake pad 20 so that the first flat surface 301 is located on the right side. In addition, during the insertion operation of the brake pad 22, the main body 30 is arranged on the outer surface side of the brake pad 22 so that the first flat surface 301 is located on the right side. According to such an arrangement, it is easy for the operator to visually check the internal space 16 from the opening 18, so the workability is improved.

[0080] Description of symbols

[0081] 10: Braking device; 12: Shell body; 14: Brake disc; 16: Internal space; 18: Opening; 20, 22: Brake pad; 20a, 22a: Front; 30: Main body; 32: Long screw for removal; 34: Nut for removal; 36: Flat washer; 38: Long screw for insertion; 40: Nut; 50: Wrench; 121: Outer side; 122: Inner side; 201, 221: Threaded hole; 301: First plane; 302: Second plane; 303: Through hole; 304: Through hole for positioning; 305: Threaded hole for insertion; 306, 308: Guide label; 309: Guide label; 310, 312: Chamfered.

Claims

1. A brake pad insertion and extraction auxiliary tool, which is used when a pair of brake pads arranged in the inner space of a brake device of an elevator traction machine is extracted or inserted from an opening portion communicating with the inner space of the brake device, wherein: The pair of brake pads each have a threaded hole portion on a front portion facing the opening portion. The brake pad insertion and extraction auxiliary tool comprises: A main body, wherein the first plane portion and the second plane portion are connected in a manner to form an L-shape in a cross section perpendicular to the long side direction; two long extraction screws, which are respectively screwed into the threaded hole portions; and Two extraction nuts, which are respectively screwed with the two long screws, The first flat surface portion has two through holes formed with a diameter larger than the outer diameter of the long extraction screw. In the removal operation of the pair of brake pads, The two long extraction screws are respectively configured such that one end is screwed into the threaded hole portion while passing through the two through holes. The two extraction nuts are configured to be screwed respectively between the other ends of the two long extraction screws and the main body.

2. The brake pad insertion and extraction aid according to claim 1, wherein: The two through holes are formed at the same pitch as the pitch between the threaded hole portions of the pair of brake pads.

3. The brake pad insertion and extraction auxiliary tool according to claim 1 or 2, wherein: The entire length of the first planar portion of the main body in the longitudinal direction is greater than the lateral opening width of the opening.

4. The brake pad insertion and extraction auxiliary tool according to any one of claims 1 to 3, wherein: The brake pad insertion and extraction auxiliary tool further includes two flat washers, through which the two long extraction screws respectively pass, and the two flat washers are sandwiched between the extraction nut and the through hole.

5. The brake pad insertion and extraction auxiliary tool according to any one of claims 1 to 4, wherein: During the extraction operation, the main body is arranged in an orientation in which the second planar portion is located below the first planar portion.

6. The brake pad insertion and extraction auxiliary tool according to any one of claims 1 to 5, wherein: The main body portion includes chamfered portions at corners on the end side of the short-side direction of the first planar portion and at corners on the end side of the short-side direction of the second planar portion.

7. The brake pad insertion and extraction aid according to any one of claims 1 to 6, wherein: The second flat surface portion includes a pair of insertion screw holes arranged in parallel along the longitudinal direction. The brake pad insertion and extraction auxiliary tool includes a pair of long insertion screws, each of which has a head at one end and the other end is screwed into the insertion threaded hole. During the insertion operation of the brake pad, The main body is arranged in the internal space at a position where the second flat surface contacts the inner side surface of the opening and the other ends of the pair of long insertion screws screwed into the insertion threaded holes contact the front surface of the brake pad.

8. The brake pad insertion and extraction aid according to claim 7, wherein: A positioning through hole having a diameter larger than the outer diameter of the long extraction screw is further provided between the pair of insertion threaded hole portions. In the insert operation, The long extraction screw is configured to pass through the positioning through-hole and be threadedly engaged with the threaded hole portion of the brake pad.

9. The brake pad insertion and extraction auxiliary tool according to claim 7 or 8, wherein: A pitch between the pair of insertion screw hole portions is configured to be narrower than a length in a longitudinal direction of the front surface portion of the brake pad.

10. The brake pad insertion and extraction aid according to any one of claims 7 to 9, wherein: The entire length of the second planar portion of the main body in the longitudinal direction is greater than the longitudinal opening width of the opening.

11. The brake pad insertion and extraction aid according to any one of claims 7 to 10, wherein: In the insert operation, The main body portion is disposed in an orientation in which the first flat surface portion is located on an outer surface side of the brake pad.

12. A brake pad insertion and extraction method, using the brake pad insertion and extraction auxiliary tool according to any one of claims 1 to 6, to extract or insert a pair of brake pads arranged in the internal space of a brake device of an elevator traction machine from an opening communicating with the internal space of the brake device, wherein: The brake pad insertion and extraction method comprises: The step of screwing the two extraction nuts into engagement with the two long extraction screws, respectively; a first setting step of disposing the main body on the outer side of the opening, allowing the two long extraction screws to penetrate the two through holes respectively, and allowing one end of the two long extraction screws to be screwed into the threaded hole portions respectively; and A step of tightening the two extraction nuts.

13. The brake pad insertion and extraction method according to claim 12, wherein: In the first setting step, the main body is arranged in an orientation in which the second planar portion is located below the first planar portion.

14. A method for inserting and removing a brake pad, using the brake pad insertion and removal auxiliary tool according to any one of claims 7 to 11, inserting the brake pad into an installation position from an opening communicating with the internal space of a brake device of an elevator traction machine, wherein: The brake pad insertion and extraction method comprises: a step of disposing the brake pad at a position in the internal space that is closer to the front side of the installation position in the insertion direction; a second setting step of arranging the main body in the internal space at a position where the second flat surface contacts the inner side surface of the opening and the other ends of the pair of long insertion screws screwed into the insertion threaded hole contact the front surface of the brake pad; and A step of tightening the pair of long insertion screws.

15. The brake pad insertion and extraction method according to claim 14, wherein: In the second installation step, the main body portion is arranged in a direction in which the first flat surface portion is located on the outer surface side of the brake pad.

16. The brake pad insertion and extraction method according to claim 14 or 15, wherein: The main body further includes a positioning through hole between the pair of insertion threaded holes, the positioning through hole being formed to have a diameter larger than the outer diameter of the long extraction screw. The second setting step further includes a step of passing the long extraction screw through the positioning through hole and threading the long extraction screw into the threaded hole portion of the brake pad.

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