Elevator work fixture and method of detaching and attaching spacer from / to balance weight

Abstract

To provide a fixture or the like capable of detaching or attaching a space from / to a balance weight without detaching or attaching the spacer from / to the balance weight overhead, and improving human safety.SOLUTION: A fixture 1 comprises: an attachment 10 attached to a car upper part 3 positioned on the upper side of a car 5 in an elevator 50; and a plate-like part 60 connected to the attachment 10 through a connection 40. The connection 40 has a distance varying function 75 capable of varying a distance between the plate-like part 60 and the attachment 10.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an elevator work tool, for example, an elevator work tool that can be used when removing a spacer from an elevator counterweight or when attaching a spacer to an elevator counterweight. The present disclosure also relates to a method for removing a spacer from an elevator counterweight and a method for attaching a spacer to an elevator counterweight. [Background technology]

[0002] A conventional elevator is described in Patent Document 1. This elevator has a spacer attached to the lower end of the counterweight that extends downward. This ensures that if a problem occurs with the elevator and the counterweight descends to an unexpected position, the spacer will preferentially come into contact with a shock absorber installed in the pit, preventing the counterweight from descending to a position where the car would come into contact with the ceiling.

[0003] More specifically, the clearance between the counterweight and the buffer when the car is stopped at the top floor landing must be within a legally defined range. However, the clearance varies depending on the expansion and contraction of the wire rope. The spacer is attached to or detached from the counterweight as appropriate so that the clearance falls within the legally defined range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-178500 A Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, when removing or attaching a spacer to a counterweight, the counterweight must be moved to the lowest position, and the worker must place his / her feet on a counterweight wheel installed on a caterpillar, a beam of the elevator, or a pit, and then perform the work of removing the spacer from the counterweight or attaching the spacer to the counterweight overhead. However, with this method, the spacer, which is a gravitational object, is located overhead during the work, and there is a risk that the person may be exposed to danger if the spacer accidentally falls.

[0006] Therefore, an object of the present disclosure is to provide an elevator work tool that can increase human safety by enabling removal of a spacer from a balancing weight and installation of a spacer to a balancing weight without performing overhead removal work of the spacer from the balancing weight and overhead installation work of the spacer to the balancing weight.

[0007] Another object of the present disclosure is to provide a method of removing and attaching a spacer to a counterweight, which enables removal and attachment of a spacer from and to a counterweight without performing the overhead work of removing and attaching the spacer from and to the counterweight, thereby increasing the safety of the person performing the work. [Means for solving the problem]

[0008] In order to solve the above problems, the elevator work jig disclosed herein comprises an attachment portion that is attached to the top of the car located above the car in the elevator, and a plate-shaped portion that is connected to the attachment portion via a connecting portion (arm portion), and the connecting portion has a distance variation mechanism that can vary the distance between the plate-shaped portion and the attachment portion.

[0009] The elevator work jig is used, for example, as follows. In detail, when removing a spacer from a counterweight, for example, first, the mounting part is attached to the top of the car, and then the plate-shaped part is moved to a position where the top surface of the plate-shaped part overlaps the counterweight in the height direction using the distance variation mechanism. Thereafter, the spacer is removed from the counterweight and placed on the top surface of the plate-shaped part. Next, the plate-shaped part on which the spacer is placed is moved toward the car using the distance variation mechanism. Thereafter, a person who has boarded the car, for example a maintenance worker, removes the spacer by moving the spacer from the plate-shaped part located around the car in the depth direction onto the car.

[0010] Conversely, when attaching a spacer to the counterweight, for example, first, the attachment part is attached to the top of the car, and then the plate part is positioned around the car using the distance variation mechanism. Next, a person who has climbed onto the car, for example a maintenance worker, places a spacer on the top surface of the plate part from above the car. After that, the distance variation mechanism is used to move the plate part on which the spacer is placed from the periphery of the car to a position where the top surface of the plate part overlaps with the counterweight in the height direction. Finally, with the plate part positioned at that position, the spacer is attached to the counterweight, thereby completing the installation of the spacer.

[0011] According to this configuration, by using the elevator work tool, a person on the car can remove the spacer from the counterweight and can also attach the spacer to the counterweight. As a result, the spacer is not positioned above the person's head during the spacer removal and spacer installation work. Therefore, even if the spacer accidentally falls during work, the fallen spacer will not come into contact with the person. This increases the safety of the person performing the spacer removal and spacer installation work.

[0012] The present invention can also be used in the operation of an elevator equipped with a compensating rope that connects the car and the balancing weight via a balancing wheel provided in a pit, and when the connecting portion changes the distance between the plate-shaped portion and the mounting portion attached to the top of the car, the plate-shaped portion may be movable so as to avoid contact with the compensating rope in a plan view seen from above in the vertical direction.

[0013] Elevators equipped with compensating ropes are often high-rise, high-speed elevators, and the work of removing and installing spacers often requires work at high altitudes. In addition, the spacers are often heavy. As a result, conventional methods pose a high risk to workers.

[0014] In this background, according to the present configuration, the plate-shaped portion can be moved so as to avoid contact with the compensating rope, and even in an elevator with a compensating rope, the spacer removal and installation work can be performed by a person on the car alone. Therefore, the operational effect of increasing the safety of people during the work of removing and installing a spacer can be prominently achieved.

[0015] In addition, the connecting portion may have a first connection portion and a second connection portion positioned at a distance from the first connection portion, the first connection portion may have a first rod-shaped portion and a second rod-shaped portion having an end portion on the mounting portion side at an end opposite the mounting portion side of the first rod-shaped portion where a first rotation center is rotatably attached relative to a first fulcrum, and the second connection portion may have a third rod-shaped portion and a fourth rod-shaped portion having an end portion on the mounting portion side at an end opposite the mounting portion side of the third rod-shaped portion where a second rotation center is rotatably attached relative to a second fulcrum, and the length obtained by adding the length in the extension direction of the first rod-shaped portion to the length in the extension direction of the second rod-shaped portion may be shorter than the length obtained by adding the length in the extension direction of the third rod-shaped portion to the length in the extension direction of the fourth rod-shaped portion.

[0016] According to this configuration, by moving the plate-like portion along a curve, a configuration for varying the distance between the car and the plate-like portion can be realized with a simple structure, and the plate-like portion can be moved to avoid the compensating rope with a simple structure. Therefore, even if the elevator is a high-speed elevator for a high-rise building that has a compensating rope, a person in the car can remove or install the spacer using an elevator work tool with a simple structure.

[0017] The device may also be provided with a string-shaped member and a position limiting portion that can limit the position of a part of the string-shaped member relative to the plate-shaped portion, and the string-shaped member may be configured to connect the basket and the position limiting portion, thereby preventing the plate-shaped portion from falling out of the basket without restriction.

[0018] With this configuration, the plate-shaped portion can be prevented from falling into the pit.

[0019] The plate-shaped portion may have one or more screw holes.

[0020] The removable spacer may have a flange at its lower end, and the flange may have one or more screw holes for fastening another spacer to the underside of the spacer.

[0021] According to this configuration, since the plate-shaped portion has a screw hole, the plate-shaped portion can be fastened to the flange by a screw such as a bolt using the screw hole of the plate-shaped portion and the screw hole of the flange. Therefore, it is possible to prevent the spacer from coming off the plate-shaped portion and to suppress the spacer from falling into the pit.

[0022] More specifically, in a specification in which the plate-shaped portion has a screw hole, if the elevator work tool is equipped with a string-shaped member made of a wire or the like and a position limiting portion, it is possible to prevent the spacer from coming off the plate-shaped portion and also to prevent the plate-shaped portion from falling from the car. Therefore, even if the connecting portion is damaged by breaking or the like, it is possible to prevent the spacer, which is a heavy object, from falling into the pit, ensuring complete safety.

[0023] The mounting portion may also include a pie rack.

[0024] According to this configuration, the mounting portion can be firmly fixed to the upper part of the basket.

[0025] Furthermore, the spacer removal method according to the present disclosure is a spacer removal method for removing a spacer from a balancing weight using an elevator work jig according to the present disclosure, and includes: a first step of attaching a mounting portion of the elevator work jig to an upper part of a car located above the car; a second step of removing the spacer from the balancing weight with the plate-shaped portion covering an underside of the spacer of the balancing weight after the first step and placing the spacer on an upper surface of the plate-shaped portion; and a third step of shortening the distance between the plate-shaped portion and the mounting portion using the distance variation mechanism with the spacer placed on the upper surface of the plate-shaped portion after the second step.

[0026] According to the present disclosure, the spacer is not positioned above the head during removal of the spacer from the counterweight, thereby increasing the safety of the person performing the work.

[0027] Furthermore, a spacer installation method according to the present disclosure is a spacer installation method for installing a spacer to a balancing weight using an elevator work jig according to the present disclosure, and includes a first step of installing an installation portion of the elevator work jig to an upper part of the car located above the car, a second step of placing the spacer on an upper surface of the plate-shaped portion, a third step of using the distance variation mechanism to increase the distance between the installation portion and the plate-shaped portion while the spacer is placed on the upper surface of the plate-shaped portion after performing the first step and the second step, and a fourth step of installing the spacer on the underside of the balancing weight after the third step.

[0028] According to the present disclosure, the spacer is not positioned above the worker's head while being attached to the counterweight, thereby increasing the safety of the worker. Effect of the Invention

[0029] According to the elevator work tool of the present disclosure, a spacer can be removed from a counterweight and a spacer can be attached to the counterweight without performing overhead work to remove the spacer from the counterweight and to attach the spacer to the counterweight, thereby increasing the safety of people. Also, according to the method of removing and attaching a spacer to a counterweight of the present disclosure, a spacer can be removed from a counterweight and a spacer can be attached to the counterweight without performing overhead work to remove the spacer from the counterweight and to attach the spacer to the counterweight. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a side view of one state in which a spacer is being removed from a counterweight using an elevator jig according to an embodiment of the present disclosure, as viewed from the side of the car in a hoistway. [Diagram 2] FIG. 2 is a plan view of the surrounding area of ​​the elevator jig when the above-mentioned state is viewed from above the counterweight in the elevator shaft. [Diagram 3] FIG. 13 is a diagram for explaining an example of a method for attaching the attachment portion, and shows the attachment portion attached to the handrail. [Figure 4] 4 is a schematic plan view of the mounting portion as viewed from above in the height direction. FIG. [Diagram 5] FIG. 13 is a perspective view of the pie rack of the mounting portion. [Figure 6] 3 is a plan view illustrating a connection structure between a protrusion indicated by R1 in FIG. 2 and a first rod-shaped portion. FIG. [Figure 7] 3 is a plan view illustrating a connection structure between a first rod-shaped portion and a second rod-shaped portion indicated by R2 in FIG. 2. FIG. [Figure 8] This is a plan view of the end area on one side in the width direction and on the basket side in the depth direction on the back surface of the plate-shaped portion, as viewed from below in the thickness direction of the plate-shaped portion. [Figure 9] 2 is a plan view of the surface (upper surface) of the plate-shaped portion as viewed from above in the thickness direction of the plate-shaped portion. FIG. [Figure 10] FIG. 2 is a side view of the counterweight as viewed from one side in the width direction. [Figure 11]11 is a plan view of the area around the counterweight during removal of the spacer, as viewed from above in the height direction. FIG. [Figure 12] 13 is a side view of the counterweight during removal of the spacer, as viewed from one widthwise side. FIG. [Figure 13] 13 is a plan view of the surrounding area of ​​the elevator jig when viewed from above the balancing weight in another state in which a spacer is being removed from the balancing weight using the elevator jig. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, when multiple embodiments and modified examples are included below, it is assumed from the beginning that new embodiments will be constructed by appropriately combining the characteristic parts of those. In addition, in the following examples, the same components in the drawings are given the same reference numerals, and duplicated explanations are omitted. In addition, each drawing is a schematic diagram, and the dimensional ratios of length, width, height, etc. of each member between different drawings do not necessarily match. In addition, among the components described below, the components not described in the independent claims showing the highest concept are optional components and are not essential components.

[0032] Fig. 1 is a side view of a state in which a spacer 85 is being removed from a counterweight 80 using an elevator jig 1 according to an embodiment of the present disclosure, as viewed from the side of a car 5 in a hoistway. Fig. 2 is a plan view of the peripheral area of ​​the elevator jig 1, as viewed from above the counterweight 80 in the hoistway, in that state. Note that in Fig. 2, the compensating rope 70 is shown in a cross section obtained by cutting the compensating rope on a plane parallel to the upper surface of the plate-shaped portion 60.

[0033] 1 and 2, elevator jig (hereinafter simply referred to as jig) 1 includes a mounting part 10, a connecting part (arm part) 40 having one end connected to the mounting part 10 so as to be relatively movable, and a plate-like part 60 attached to the other end of the connecting part 40. The mounting part 10 is attached to a car upper part 3 located above a car 5 in an elevator 50, and is attached, for example, to a handrail 8 that is disposed on the car upper part 3 and extends in a substantially horizontal direction.

[0034] FIG. 3 is a diagram for explaining an example of a method for attaching the mounting portion 10, and is a diagram showing the mounting portion 10 attached to the handrail 8. FIG. 4 is a schematic plan view of the mounting portion 10 when viewed from above in the height direction. Referring to FIG. 3, in this embodiment, the handrail 8 has an L-shaped cross section. As shown in FIG. 3 and FIG. 4, the mounting portion 10 has a main body 11 and a pie rack 18 shown in a perspective view in FIG. 5. As shown in FIG. 4, the main body 11 has a structure in which the protruding portions 13, 14 protrude from both ends of the extension direction (corresponding to the width direction of the cage 5) of one flat plate portion 12 of the L-shaped angle in a direction perpendicular to the extension direction. Each of the protruding portions 13, 14 is provided with a cylindrical hole 15, 16 penetrating the protruding portion 13, 14 in the thickness direction of the protruding portion 13, 14.

[0035] As shown in FIG. 5, the pie rack 18 has a metal main body 19 curved into a U-shape, and a bolt 25. The main body 19 has a pair of opposing parts 21, 22 that face each other in the height direction of the pie rack 18 via a curved part 20. One of the opposing parts 21 has a screw hole 23 that extends in the height direction and penetrates the opposing part 21. The bolt 25 is screwed into the screw hole 23. As shown in FIG. 3, the handrail 8 and the flat part 12 are arranged between the pair of opposing parts 21, 22 so that they are approximately parallel to each other, and then the bolt 25 is tightened into the screw hole 23 to clamp the handrail 8 and the flat part 12 between the tip of the bolt 25 and the opposing part 22. This clamping allows the flat part 12 to be firmly fixed to the handrail 8.

[0036] With the flat plate portion 12 properly fixed to the handrail 8, the flat plate portion 12 protrudes toward the rear side in the depth direction of the cage 5 and expands in the horizontal direction. Next, the structure of the connecting portion 40 will be described. As shown in FIG. 2, the connecting portion 40 has a first connecting portion 41 and a second connecting portion 42 that is spaced apart from the first connecting portion 41. The first connecting portion 41 has a first rod-shaped portion 45 and a second rod-shaped portion 46. The first rod-shaped portion 45 and the second rod-shaped portion 46 are each composed of a rod member having a slender flat plate shape. The end portion of the second rod-shaped portion 46 on the mounting portion 10 side is attached to the end portion of the first rod-shaped portion 45 opposite to the mounting portion 10 side so that the first rotation center can rotate with respect to the first fulcrum.

[0037] The second connection portion 42 has a third rod-shaped portion 47 and a fourth rod-shaped portion 48. The third rod-shaped portion 47 and the fourth rod-shaped portion 48 are each formed of a long, thin, flat rod member. The end of the fourth rod-shaped portion 48 on the mounting portion 10 side is attached to the end of the third rod-shaped portion 47 on the opposite side to the mounting portion 10 side so that the second rotation center is rotatable with respect to the second fulcrum.

[0038] The end of the first rod-shaped portion 45 on the mounting portion 10 side is attached to the protruding portion 13 so that the third rotation center is rotatable about the third fulcrum, and the end of the third rod-shaped portion 47 on the mounting portion 10 side is attached to the protruding portion 14 so that the fourth rotation center is rotatable about the fourth fulcrum. The sum of the length of the first rod-shaped portion 45 in the extension direction and the length of the second rod-shaped portion 46 in the extension direction is shorter than the sum of the length of the third rod-shaped portion 47 in the extension direction and the length of the fourth rod-shaped portion 48 in the extension direction.

[0039] As shown in Fig. 2, the plate-shaped portion 60 preferably has a substantially rectangular shape in a plan view. The end of the second rod-shaped portion 46 opposite to the first rod-shaped portion 45 is attached to the end of the plate-shaped portion 60 on one side in the width direction and on the basket 5 side in the depth direction on the lower side so that the fifth rotation center can rotate about the fifth fulcrum. The end of the fourth rod-shaped portion 48 opposite to the third rod-shaped portion 47 is attached to the end of the plate-shaped portion 60 on the one side in the width direction and on the opposite side to the basket 5 side in the depth direction on the lower side so that the sixth rotation center can rotate about the sixth fulcrum.

[0040] Fig. 6 is a plan view for explaining the connection structure between the protrusion 13 and the first rod-shaped portion 45 indicated by R1 in Fig. 2, and Fig. 7 is a plan view for explaining the connection structure between the first rod-shaped portion 45 and the second rod-shaped portion 46 indicated by R2 in Fig. 2. The connection structure between the protrusion 14 and the third rod-shaped portion 47 is the same as the connection structure between the protrusion 13 and the first rod-shaped portion 45, and the connection structure between the third rod-shaped portion 47 and the fourth rod-shaped portion 48 is the same as the connection structure between the first rod-shaped portion 45 and the second rod-shaped portion 46. The connection structure between the protrusion 14 and the third rod-shaped portion 47 and the connection structure between the third rod-shaped portion 47 and the fourth rod-shaped portion 48 will not be explained.

[0041] As shown in FIG. 6, the structure of the first rod-shaped portion 45, in which the third rotation center is attached to the protruding portion 13 so as to be rotatable about the third fulcrum, can be realized by a joint structure, for example, by a joint structure using a push rivet 51a. More specifically, the push rivet 51a includes a screw and a base. The end of the first rod-shaped portion 45 on the side of the mounting portion 10 has a cylindrical hole 52 penetrating the end in the thickness direction of the first rod-shaped portion 45. The cylindrical hole 15 of the protruding portion 13 and the cylindrical hole 52 of the first rod-shaped portion 45 are overlapped in the thickness direction. Next, the temporarily integrated push rivet 51a, i.e., a screw whose leg side is simply inserted into the hole of the base, is inserted into the two overlapped cylindrical holes 15, 52.

[0042] The head of the screw is then pushed toward the base to open the legs of the base. In this way, the overlapping flat protruding portion 13 and flat first rod-shaped portion 45 are sandwiched between the opened legs and the head of the base, connecting the protruding portion 13 and the first rod-shaped portion 45. By using this method, the first rod-shaped portion 45 can be freely rotated relative to the protruding portion 13.

[0043] It is preferable that the flat protruding portion 13 and the flat first rod-shaped portion 45 extend in a substantially horizontal direction (a direction substantially perpendicular to the vertical direction) when the mounting portion 10 is properly attached to the basket 5, and it is preferable that the first rod-shaped portion 45 is located above the protruding portion 13 in this state. The joint structure may be a joint structure that does not use a push rivet, and may be, for example, a joint structure that includes a bearing. Any known joint structure that is used in existing parallel links may be used as the joint structure.

[0044] As shown in FIG. 7, the structure in which the second rod-shaped portion 46 is attached to the first rod-shaped portion 45 so that the first rotation center is rotatable about the first fulcrum can also be realized by a joint structure, for example, by a joint structure using a push rivet 51b. The push rivet 51b includes a screw and a base. The end of the first rod-shaped portion 45 opposite the mounting portion 10 side has a cylindrical hole 55 penetrating the end in the thickness direction of the first rod-shaped portion 45, and the end of the second rod-shaped portion 46 on the mounting portion 10 side has a cylindrical hole 56 penetrating the end in the thickness direction of the second rod-shaped portion 46. The cylindrical hole 55 of the first rod-shaped portion 45 and the cylindrical hole 56 of the second rod-shaped portion 46 are overlapped in the thickness direction.

[0045] Then, the temporarily integrated push rivet 51b, i.e., a screw with its leg simply inserted into the hole of the base, is inserted into the two overlapping cylindrical holes 55, 56. After that, the head of the screw is pushed toward the base to open the leg of the base. In this way, the overlapping flat plate-like first rod-shaped portion 45 and flat plate-like second rod-shaped portion 46 are sandwiched between the open leg and the head of the base, thereby connecting the first rod-shaped portion 45 and the second rod-shaped portion 46. By adopting this method, the second rod-shaped portion 46 can be freely bent relative to the first rod-shaped portion 45. The first rod-shaped portion 45, the second rod-shaped portion 46, the push rivet 51b, the third rod-shaped portion 47, the fourth rod-shaped portion 48, and the push rivet (not shown) that enables the bending of the fourth rod-shaped portion 48 relative to the third rod-shaped portion 47 constitute the distance variation mechanism 75 (see FIG. 2).

[0046] It is preferable that the flat first rod-shaped portion 45 and the flat second rod-shaped portion 46 extend in a substantially horizontal direction (a direction substantially perpendicular to the vertical direction) when the mounting portion 10 is properly attached to the basket 5, and it is preferable that the second rod-shaped portion 46 is located above the first rod-shaped portion 45 in this state. The joint structure may be a joint structure that does not use a push rivet, and may be, for example, a joint structure that includes a bearing. Any known joint structure that is used in existing parallel links may be used as the joint structure.

[0047] Next, the connection structure between the second rod-shaped portion 46 and the plate-shaped portion 60 will be described. The connection structure between the fourth rod-shaped portion 48 and the plate-shaped portion 60 is the same as the connection structure between the second rod-shaped portion 46 and the plate-shaped portion 60, so a description thereof will be omitted. The connection of the plate-shaped portion 60 to the second rod-shaped portion 46 so as to enable relative movement can be realized by the connection using the push rivet described above. However, here, a structure for connecting the second rod-shaped portion 46 and the plate-shaped portion 60 using a rolling bearing will be described.

[0048] FIG. 8 is a plan view of the end of the back surface of the plate-shaped portion 60 on one side in the width direction and on the basket 5 side in the depth direction, as viewed from the bottom side in the thickness direction of the plate-shaped portion 60. As shown in FIG. 8, a cylindrical portion 57 protruding downward is provided at the end. Meanwhile, a cylindrical hole 58 is provided at the end of the second rod-shaped portion 46 opposite to the first rod-shaped portion 45 side. A rolling bearing 59 such as a ball bearing is fixed between the cylindrical outer peripheral surface of the cylindrical portion 57 and the cylindrical inner peripheral surface of the cylindrical hole. In this way, a connection that allows the plate-shaped portion 60 to be moved relative to the second rod-shaped portion 46 can be realized.

[0049] Next, other structures of the plate-shaped portion 60 will be described. Fig. 9 is a plan view of the surface (upper surface) of the plate-shaped portion 60 when viewed from above in the thickness direction of the plate-shaped portion 60. As shown in Fig. 9, one or more screw holes 61, preferably a plurality of screw holes 61, are provided on the surface of the plate-shaped portion 60. In the example shown in Fig. 9, four screw holes 61 arranged in two rows and two columns in the longitudinal and width directions of the plate-shaped portion 60 are provided on the surface of the plate-shaped portion 60.

[0050] The jig 1 also includes a position limiting portion 65 that can limit the position of a string-like member 63 (see FIG. 2), for example, a part of a steel wire or rope, relative to the plate-like portion 60. In the example shown in FIG. 9, the position limiting portion 65 is configured with a hook bolt that is fastened and fixed inside the plate-like portion 60 from a side surface located on one side of the plate-like portion 60 in the width direction.

[0051] 2, a part of the string-like member 63 passes through the through hole 65a of the hook bolt. In addition, both ends of the string-like member 63 are fastened to the handrail 8 and fixed so as not to be detached from the handrail 8. As a result, the plate-like portion 60 cannot be detached from the car 5, and is prevented from falling from the car 5 to the pit of the elevator shaft.

[0052] In this embodiment, the position limiting portion 65 is configured with a hook bolt fastened to the side surface of the plate-shaped portion 60. However, the position limiting portion may have any configuration as long as it is capable of restricting the position of a part of the string-shaped member 63 relative to the plate-shaped portion 60. For example, the position limiting portion may be configured with a through hole penetrating the plate-shaped portion in the thickness direction of the plate-shaped portion, and for example, the through hole may be provided on an edge portion on one side in the width direction of the plate-shaped portion.

[0053] Next, an example of a method for removing a spacer from a counterweight 80 of an elevator 50 equipped with a compensating rope 70 (see Figs. 1 and 2) will be described. Fig. 10 is a side view of the counterweight 80 as viewed from one side in the width direction. As shown in Fig. 10, a spacer 85 is present below the counterweight 80, and the spacer 85 has a flange 86 at its lower end. The flange 86 also includes a shaft receiving portion 88 through which a shaft portion of a screw 87 such as a bolt can pass through the flange 86 in the height direction. The shaft receiving portion 88 penetrates the flange 86 in the thickness direction, and is constituted by, for example, a through-hole or a recess (notch).

[0054] In this removal method, an example of a method for removing one spacer 85 attached to the counterweight 80 will be described. Fig. 11 is a plan view of the area around the counterweight 80 when the spacer 85 is being removed from above in the height direction. Note that in Fig. 11, similar to Fig. 2, the compensating rope 70 is shown in a cross section obtained by cutting the compensating rope along a plane parallel to the upper surface of the plate-shaped portion 60.

[0055] When removing the spacer 85, first, as shown in Fig. 11, the plate-shaped portion 60 is placed near the handrail, and then the mounting portion 10 is attached to the handrail 8 extending in the width direction of the car at a location on one side of the compensating rope 70 in the width direction. In addition, the string-shaped member 63 is fastened to the position limiting portion 65 and fastened to a position between the first rod-shaped portion 45 and the third rod-shaped portion 47 of the handrail 8 to prevent the plate-shaped portion 60 from falling from the car 5 to the pit.

[0056] Next, the plate-shaped portion 60 is pressed toward the rear in the depth direction to avoid contact with the compensating rope 70 and move in an arc, thereby moving the plate-shaped portion 60 of the jig 1 from the position shown in Figure 11 to the position shown in Figure 2, i.e., from a position around the handrail 8 to a position where the plate-shaped portion 60 overlaps the counterweight 80 in the height direction.

[0057] 12, that is, a side view of the counterweight 80 viewed from one widthwise side during the removal of the spacer 85, the shafts of the bolts 94 are passed through the shaft receiving portions 88 of the flange 86 and then fastened into the screw holes 61 of the plate-like portion 60 to fix the flange 86 to the plate-like portion 60. The flange 86 is preferably fixed to the plate-like portion 60 using two or more bolts 94, for example, four bolts 94 arranged in two rows and two columns in a plan view.

[0058] After that, one or more bolts 91 attaching the spacer 85 to the weight body 89 of the counterweight 80 are removed. Next, as shown in Fig. 13, the plate-shaped portion 60 with the spacer 85 fixed to its upper surface is pulled toward the cage 5, and the plate-shaped portion 60 is positioned around the handrail 8. Next, the bolts 94 are removed from the plate-shaped portion 60, and the spacer 85 is released from its fixed position to the plate-shaped portion 60. Finally, after the spacer 85 has been moved from the plate-shaped portion 60 onto the cage 5, the jig 1 is removed from the handrail 8, completing the removal of the spacer 85 from the counterweight 80.

[0059] Meanwhile, the spacer 85 can be attached to the counterweight 80, for example, as follows. First, as shown in Fig. 11, the attachment part 10 is attached to the handrail 8 extending in the width direction of the car at a location on one side of the compensating rope 70 in the width direction. In addition, the string-like member 63 is fastened to the position limiting part 65 and is fastened to a position between the first rod-like part 45 and the third rod-like part 47 of the handrail 8 to prevent the plate-like part 60 from falling from the car 5 to the pit.

[0060] Next, the plate-shaped portion 60 is pulled toward the cage 5, and the spacer 85 is fixed to the plate-shaped portion 60 using one or more bolts 94. After that, the plate-shaped portion 60 is pushed toward the rear in the depth direction to move the plate-shaped portion 60 to a position where the plate-shaped portion 60 overlaps the counterweight 80 in the height direction. Next, as shown in FIG. 12, with the spacer 85 fixed to the upper surface of the plate-shaped portion 60, the spacer 85 is fixed to the body flange 93 located at the lower end of the counterweight body 89 using one or more bolts 91. After that, all the bolts 94 are removed from the spacer 85, and then the jig 1 is removed from the handrail 8, completing the installation of the spacer 85 to the counterweight 80.

[0061] As described above, the jig 1 according to the present disclosure includes the mounting part 10 that is attached to the car upper part 3 located above the car 5 in the elevator 50, and the plate-like part 60 that is connected to the mounting part 10 via the connecting part 40. In addition, the connecting part 40 has a distance variation mechanism 75 that can vary the distance between the plate-like part 60 and the mounting part 10.

[0062] According to this configuration, by using the jig 1, a person standing on the cage 5 can remove the spacer 85 from the counterweight 80 and can also attach the spacer 85 to the counterweight 80. As a result, the spacer 85 is not positioned above the person's head during the spacer removal and spacer attachment work. Therefore, even if the spacer 85 accidentally falls during work, the fallen spacer 85 will not come into contact with the person. This increases the safety of the person performing the spacer removal and spacer attachment work.

[0063] The jig 1 may also be used for working on an elevator 50 equipped with a compensating rope 70 that connects the car 5 and the counterweight 80 via a counterweight wheel (not shown) provided in a pit. When the connecting portion 40 varies the distance between the plate-shaped portion 60 and the mounting portion 10 attached to the car upper portion 3, the plate-shaped portion 60 may be movable so as to avoid contact with the compensating rope 70 in a plan view seen from above in the vertical direction.

[0064] The elevator 50 equipped with the compensating rope 70 is often a high-speed elevator for a high-rise building, and the work of removing and installing the spacer is often done at high altitudes, and the spacer is often heavy. As a result, the danger to the person performing the work is high when using the conventional method.

[0065] In this context, according to the present configuration, the plate-like portion 60 can be moved so as to avoid contact with the compensating ropes 70, and even in an elevator 50 in which the compensating ropes 70 are present, the work of removing and installing a spacer can be performed only by a person standing on the car 5. Therefore, the advantageous effect of increasing the safety of people during the work of removing and installing a spacer can be prominently achieved.

[0066] The coupling portion 40 may have a first connecting portion 41 and a second connecting portion 42 positioned at a distance from the first connecting portion 41. The first connecting portion 41 may have a first rod-shaped portion 45 and a second rod-shaped portion 46 having an end portion on the mounting portion 10 side where a first rotation center is rotatably attached to a first fulcrum at an end portion of the first rod-shaped portion 45 opposite the mounting portion 10 side. The second connecting portion 42 may have a third rod-shaped portion 47 and a fourth rod-shaped portion 48 having an end portion on the mounting portion 10 side where a second rotation center is rotatably attached to a second fulcrum at an end portion of the third rod-shaped portion 47 opposite the mounting portion 10 side. The sum of the length of the first rod-shaped portion 45 in the extension direction and the length of the second rod-shaped portion 46 in the extension direction may be shorter than the sum of the length of the third rod-shaped portion 47 in the extension direction and the length of the fourth rod-shaped portion 48 in the extension direction.

[0067] According to this configuration, by moving plate-like portion 60 on a curve, a configuration for varying the distance between car 5 and plate-like portion 60 can be realized with a simple structure, and plate-like portion 60 can be moved with a simple structure so as to avoid compensating ropes 70. Therefore, even if elevator 50 is a high-speed elevator for a high rise building that has compensating ropes 70, a person on car 5 can remove and attach spacer 85 using jig 1 with a simple structure.

[0068] Also, a string-like member 63 and a position limiting part 65 that can limit the position of a part of the string-like member 63 relative to the plate-like part 60 may be provided. The string-like member 63 may connect the basket 5 to the position limiting part 65, thereby preventing the plate-like part 60 from falling off the basket 5 without restriction.

[0069] According to this configuration, it is possible to prevent the plate-shaped portion 60 from falling from the car 5 to the pit of the elevator shaft.

[0070] Furthermore, the plate-shaped portion 60 may have one or more screw holes 61 .

[0071] A flange 86 is provided at the lower end of the removable spacer 85, and the flange 86 may be provided with one or more shaft accommodating portions (e.g., through holes, recesses, etc.) 88 for accommodating the shaft portions of one or more screws 87. This may allow another spacer 85 to be fixed to the lower side of the spacer 85 with the screws 87.

[0072] According to this configuration, since the plate-shaped portion 60 has the screw hole 61, the plate-shaped portion 60 can be fastened to the flange 86 with a screw 87 such as a bolt using the screw hole 61 of the plate-shaped portion 60 and the shaft receiving portion 88 of the flange 86. Therefore, it is possible to prevent the spacer 85 from coming off the plate-shaped portion 60, and to prevent the spacer 85 from falling into the pit.

[0073] More specifically, in a specification in which the plate-shaped portion 60 has the screw holes 61, if the jig 1 further includes a string-like member 83 made of a wire or the like and a position limiting portion 65, the spacer 85 can be prevented from coming off the plate-shaped portion 60 and the plate-shaped portion 60 can also be prevented from falling from the cage 5. Therefore, even if the connecting portion 40 is damaged by breaking or the like, the spacer 85, which is a heavy object, can be prevented from falling into the pit, ensuring complete safety.

[0074] The mounting portion 10 may also include a pie rack 18 .

[0075] According to this configuration, the mounting portion 10 can be firmly fixed to the basket upper portion 3.

[0076] Furthermore, the spacer removal method according to the present disclosure is a spacer removal method for removing a spacer 85 from a balancing weight 80 using a jig 1, and includes a first step of attaching the mounting portion 10 of the jig 1 to the cage upper portion 3 located above the cage 5, a second step of removing the spacer 85 from the balancing weight 80 with the plate-shaped portion 60 covering the underside of the spacer 85 of the balancing weight 80 after the first step, and placing the spacer 85 on the upper surface of the plate-shaped portion 60, and a third step of shortening the distance between the plate-shaped portion 60 and the mounting portion 10 using the distance variation mechanism 75 with the spacer 85 placed on the upper surface of the plate-shaped portion 60 after the second step.

[0077] According to the present disclosure, the spacer 85 is not positioned above the head during removal of the spacer 85 from the counterweight 80, thereby increasing the safety of the person performing the work.

[0078] Furthermore, the spacer mounting method according to the present disclosure is a spacer mounting method for mounting a spacer 85 to a balancing weight 80 using a jig 1, and includes a first step of mounting the mounting portion 10 of the jig 1 to the cage upper portion 3 located above the cage 5, a second step of placing the spacer 85 on the upper surface of the plate-shaped portion 60, a third step of lengthening the distance between the mounting portion 10 and the plate-shaped portion 60 using a distance variation mechanism 75 while the spacer 85 is placed on the upper surface of the plate-shaped portion 60 after performing the first and second steps, and a fourth step of mounting the spacer 85 to the underside of the balancing weight 80 after the third step.

[0079] According to the present disclosure, the spacer 85 is not positioned above the head during attachment of the spacer 85 to the counterweight 80, thereby increasing the safety of the person performing the work.

[0080] The present disclosure is not limited to the above-described embodiment and its modified examples, and various improvements and modifications are possible within the scope of the claims of the present application and their equivalents.

[0081] For example, in the above embodiment, a case has been described in which the flat plate portion 12 and the handrail 8, which overlap in the height direction, are clamped and fixed by the pile rack 18 of the mounting portion 10. However, a configuration in which a flat plate portion 96 (see FIG. 3) extending in the height direction present in the upper part of the car and a flat plate portion 97 of the jig 1 arranged so as to overlap the flat plate portion 96 in the depth direction are clamped and fixed by the pile rack 18 may also be used. Also, a case has been described in which the mounting portion 10 includes the pile rack 18, but the mounting portion does not have to include a pile rack, and may be configured, for example, to be fastened and fixed to the upper part of the car with screws.

[0082] Also, the case where the plate-shaped part 60 of the jig 1 can move on a curve so as to avoid contact with the compensating rope 70 has been described. However, the jig of the present disclosure may be used in an elevator that does not have a compensating rope. In this case, the distance variation mechanism may be configured to move the plate-shaped part approximately parallel to the depth direction. Such a distance variation mechanism can be easily realized, for example, by configuring it with one electric cylinder (linear actuator) that connects between the mounting part and the plate-shaped part, or by configuring it with multiple identical electric cylinders that connect between the mounting part and the plate-shaped part and are arranged approximately parallel. In this case, for example, an operating part may be provided on the mounting part, and the length of the electric cylinder may be extended or retracted by operating the operating part.

[0083] Furthermore, the jig and the method of removing and attaching a spacer according to the present disclosure may be configured as follows. Configuration 1: An elevator work tool comprising: a mounting part that is attached to the top of a car located above the car in an elevator; and a plate-shaped part that is connected to the mounting part via a connecting part, wherein the connecting part has a distance variation mechanism that can vary the distance between the plate-shaped part and the mounting part. Configuration 2: An elevator work tool as described in Configuration 1, which can be used for work on an elevator equipped with a compensating rope that connects the car and the balancing weight via a balancing wheel provided in a pit, and in which, when the connecting portion changes the distance between the plate-shaped portion and the mounting portion attached to the top of the car, the plate-shaped portion is movable so as to avoid contact with the compensating rope in a plan view seen from above in the vertical direction. Configuration 3: The elevator work jig according to configuration 1 or 2, wherein the coupling portion has a first connection portion and a second connection portion located at a distance from the first connection portion, the first connection portion has a first rod-shaped portion and a second rod-shaped portion having an end portion on the mounting portion side at an end opposite the mounting portion side of the first rod-shaped portion where a first rotation center is rotatably attached with respect to a first fulcrum, the second connection portion has a third rod-shaped portion and a fourth rod-shaped portion having an end portion on the mounting portion side at an end opposite the mounting portion side of the third rod-shaped portion where a second rotation center is rotatably attached with respect to a second fulcrum, and a sum of the length in the extension direction of the first rod-shaped portion and the length in the extension direction of the second rod-shaped portion is shorter than a sum of the length in the extension direction of the third rod-shaped portion and the length in the extension direction of the fourth rod-shaped portion. Configuration 4: An elevator work tool as described in any one of configurations 1 to 3, comprising a string-like member and a position limiting part that can limit the position of a part of the string-like member relative to the plate-like portion, wherein the string-like member ties the cage and the position limiting part together, thereby preventing the plate-like portion from falling unrestricted from the cage. Configuration 5: An elevator work tool according to any one of configurations 1 to 4, wherein the plate-shaped portion has one or more screw holes. Configuration 6: The elevator work jig described in any one of configurations 1 to 5, wherein the mounting portion includes a pie rack. Configuration 7: A spacer removal method for removing a spacer from a counterweight using an elevator work jig according to any one of configurations 1 to 6, comprising: a first step of attaching a mounting portion of the elevator work jig to an upper portion of a car located above the car; a second step of removing the spacer from the counterweight with the plate-shaped portion covering an underside of the spacer of the counterweight after the first step, and placing the spacer on an upper surface of the plate-shaped portion; and a third step of shortening the distance between the plate-shaped portion and the mounting portion using the distance variation mechanism with the spacer placed on the upper surface of the plate-shaped portion after the second step. Configuration 8: A spacer mounting method for mounting a spacer to a counterweight using an elevator work jig according to any one of configurations 1 to 6, comprising: a first step of mounting a mounting portion of the elevator work jig to an upper portion of a car located above the car; a second step of placing a spacer on an upper surface of the plate-shaped portion; a third step of using the distance variation mechanism to increase the distance between the mounting portion and the plate-shaped portion while the spacer is placed on the upper surface of the plate-shaped portion after performing the first step and the second step; and a fourth step of mounting the spacer to the underside of the counterweight after the third step. [Explanation of symbols]

[0084] 1 jig, 3 cage upper part, 5 cage, 8 handrail, 10 mounting part, 11 main body, 12,96,97 flat plate part, 13 protrusion, 14 protrusion, 15 cylindrical hole, 18 pipe rack, 19 main body part, 20 curved part, 21,22 opposing part, 23 screw hole, 25 bolt, 40 connecting part, 41 first connection part, 42 second connection part, 45 first rod-shaped part, 46 second rod-shaped part, 47 third rod-shaped part, 48 fourth rod-shaped part, 50 elevator, 51a,51b push rivet, 52,55,56,58 cylindrical hole, 57 columnar part, 59 rolling bearing, 60 plate-shaped part, 61 screw hole, 63 String-like member, 65 position limiting portion, 65a through hole, 70 compensating rope, 75 distance varying mechanism, 80 balancing weight, 83 string-like member, 85 spacer, 86 flange, 87 screw, 88 shaft accommodating portion, 89 weight main body, 91, 94 bolts, 93 main body flange.

Claims

1. An attachment part that is attached to an upper part of a car located on an upper side of the car in the elevator; A plate-shaped portion connected to the mounting portion via a connecting portion, An elevator work jig, wherein the connecting portion has a distance variation mechanism capable of varying the distance between the plate-shaped portion and the mounting portion.

2. The elevator can be used for the operation of the elevator equipped with a compensating rope that connects the cage and the counterweight via a counterweight provided in a pit, 2. The elevator work jig according to claim 1, wherein when the connecting portion changes the distance between the plate-shaped portion and the mounting portion attached to the upper portion of the car, the plate-shaped portion is movable so as to avoid contact with the compensating rope in a plan view seen from above in the vertical direction.

3. The coupling portion has a first connection portion and a second connection portion spaced apart from the first connection portion, the first connection portion includes a first rod-shaped portion and a second rod-shaped portion having an end portion on the attachment portion side, the end portion being attached to an end portion of the first rod-shaped portion opposite the attachment portion side such that a first rotation center is rotatable about a first fulcrum; the second connection portion includes a third rod-shaped portion and a fourth rod-shaped portion having an end portion on the attachment portion side, the end portion being attached to an end portion of the third rod-shaped portion opposite the attachment portion side such that a second rotation center is rotatable with respect to a second fulcrum; 3. An elevator work jig as described in claim 1 or 2, wherein the sum of the length of the first rod-shaped portion in the extension direction and the length of the second rod-shaped portion in the extension direction is shorter than the sum of the length of the third rod-shaped portion in the extension direction and the length of the fourth rod-shaped portion in the extension direction.

4. A string-like member; a position limiting portion that limits a position of a part of the string-shaped member relative to the plate-shaped portion, The elevator work jig according to claim 1 or 2, wherein the string-like member connects the cage and the position limiting portion to prevent the plate-like portion from falling unrestrained from the cage.

5. The elevator work jig according to claim 1 or 2, wherein the plate-shaped portion has one or more screw holes.

6. The elevator work jig according to claim 1 or 2, wherein the mounting portion includes a pie rack.

7. A spacer removal method for removing a spacer from a balance weight using the elevator work jig according to any one of claims 1 to 3, comprising: A first step of attaching a mounting portion of the elevator work jig to an upper portion of the car located above the car; a second step of removing the spacer from the counterweight in a state in which the plate-shaped portion covers an underside of the spacer of the counterweight after the first step, and placing the spacer on an upper surface of the plate-shaped portion; a third step of shortening a distance between the plate-like portion and the attachment portion using the distance variation mechanism while the spacer is placed on an upper surface of the plate-like portion after the second step; A spacer removal method comprising:

8. A spacer mounting method for mounting a spacer to a balance weight using the elevator work jig according to any one of claims 1 to 3, comprising the steps of: A first step of attaching a mounting portion of the elevator work jig to an upper portion of the car located above the car; a second step of placing a spacer on an upper surface of the plate-shaped portion; a third step of increasing a distance between the mounting portion and the plate-like portion using the distance variation mechanism while the spacer is placed on an upper surface of the plate-like portion after the first step and the second step are performed; a fourth step of attaching the spacer to a lower side of a counterweight after the third step; A spacer mounting method comprising:

Images