Elevator counterweight pushing jig and counterweight pushing method

Abstract

To provide a jig for pushing in a counterweight of an elevator, which can facilitate the alignment work of weights and improve safety. [Solution] A counterweight pushing tool according to an embodiment includes a support removably attached to a guide rail, and a pushing tool supported by the support for contacting a weight on a front side of the counterweight to push the weight in. The pushing tool is attached to the support so as to be movable in a direction perpendicular to the front side of the counterweight relative to the support.

Description

[Technical field]

[0001] The embodiment relates to a jig for pushing a counterweight into an elevator and a method for pushing a counterweight into an elevator. [Background technology]

[0002] There is known an elevator device in which a car and a counterweight are connected via a main rope, and the car is raised and lowered by winding up the main rope. The counterweight is configured by mounting a plurality of weights on a weight body frame. The weights are loaded one by one on the weight body frame by the manual force of an operator, and the loaded weights may be misaligned. In this case, a step is formed in the front of the counterweight. In order to eliminate this step, it is conceivable to remove the weights from the weight body frame and reload them one by one. This makes it possible to align the plurality of weights. However, in this case, the alignment of the weights takes a lot of time. In addition, the work of reloading the weights also raises concerns about the safety of the operator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-241549 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the embodiments is to provide an elevator counterweight pushing jig and a counterweight pushing method that can facilitate the alignment work of weights and improve safety. [Means for solving the problem]

[0005] The embodiment is a jig for pushing and aligning weights that constitute a counterweight that rises and falls along an elevator guide rail. The counterweight pushing jig includes a support removably attached to the guide rail, and a pushing tool supported by the support that abuts against the weights at the front of the counterweight to push in the weights. The pushing tool is attached to the support so as to be movable in a direction perpendicular to the front of the counterweight relative to the support.

[0006] The embodiment is a method for pushing and aligning a weight constituting a counterweight that rises and falls along a guide rail of an elevator using a counterweight pushing tool including a support and a pushing tool. The counterweight pushing method includes a jig attachment step of attaching the support to the guide rail and supporting the pushing tool on the support, a pushing step of abutting the pushing tool against the weight on a front side of the counterweight to push the weight, a pushing tool separating step of separating the pushing tool from the weight, and a jig removal step of removing the pushing tool from the support and from the guide rail. The pushing tool is attached to the support so as to be movable in a direction perpendicular to the front side of the counterweight relative to the support. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic cross-sectional view showing an elevator apparatus according to the present embodiment. [Diagram 2] FIG. 2 is a perspective view showing the elevator counterweight pushing jig according to the present embodiment. [Diagram 3] FIG. 3 is a perspective view showing the support structure shown in FIG. 2 from the back side. [Figure 4] 4(a) is a side view showing the attached state of the support structure shown in FIG. 3, and FIG. 4(b) is a side view showing the retracted state of the second support plate of the support structure in FIG. [Diagram 5] 5 is a cross-sectional view showing a weight contact portion of the pusher shown in FIG. [Figure 6] FIG. 6 is a top view showing the counterweight pushing jig of the elevator shown in FIG. [Figure 7]7 is a top view showing a state in which the stopper is separated from the weight main body frame in the elevator counterweight pushing jig shown in FIG. 6. FIG. [Figure 8] 8 is a cross-sectional view showing a state in which a pusher of the counterweight pusher jig of the elevator shown in FIG. 2 is brought into contact with a weight. [Figure 9] 9 is a cross-sectional view showing a state in which the pushing tool of the counterweight pushing jig of the elevator shown in FIG. 2 has been retracted from the weight. [Figure 10] FIG. 10 is a flowchart showing a method for pushing in a counterweight of an elevator according to this embodiment. [Figure 11] FIG. 11 is a flow chart showing a specific example of the jig mounting step shown in FIG. [Figure 12] FIG. 12 is a flow chart showing a specific example of the jig detaching step shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an elevator counterweight pushing jig and a counterweight pushing method according to the present embodiment will be described with reference to the drawings. First, an elevator apparatus according to the present embodiment will be described.

[0009] As shown in FIG. 1, the elevator device 1 includes a car 3 and a counterweight 4 disposed in a hoistway 2. The car 3 and the counterweight 4 are connected via a main rope 5. The main rope 5 is wound around a traction sheave 6a and a camber sheave 7 provided on a hoisting machine 6. The hoisting machine 6 winds up the main rope 5, causing the car 3 and the counterweight 4 to rise and fall. The car 3 rises and falls while being guided by a car guide rail 8 extending in the vertical direction. The counterweight 4 rises and falls while being guided by a counterweight guide rail 9 extending in the vertical direction. The hoisting machine 6 is installed in a machine room 10 provided above the hoistway 2. A control panel 11 is installed in the machine room 10. The control panel 11 is a device that controls the entire elevator device 1 including the hoisting machine 6. For example, the control panel 11 controls the operation of the hoist 6 in response to hall calls and car calls, and lands the car 3 at the hall 12 of the floor for which the call is registered.

[0010] The elevator apparatus 1 is not limited to the form shown in FIG. 1. For example, it may be a so-called machine room-less elevator apparatus. That is, the machine room 10 may not be provided, and the hoist 6 and the control panel 11 may be provided in the upper part of the hoistway 2, etc. Also, the counterweight 4 may not be connected to the main ropes 5, and the hoist 6 may wind up or pay out the main ropes 5 connected to the car 3. Even in this case, the hoist 6 can raise and lower the car 3 via the main ropes 5. That is, the elevator apparatus 1 may be an elevator apparatus that does not have a counterweight 4.

[0011] As shown in Fig. 2, the counterweight 4 includes a weight body frame 13 and a plurality of weights 14. The weight body frame 13 includes a lower beam 15, a pair of vertical beams 16 extending upward from the lower beam 15, and an upper beam 17 connecting upper ends of the pair of vertical beams 16. The weights 14 are loaded on the lower beam 15. The vertical beams 16 are configured to support corresponding ends 14a of the weights 14 in the lateral direction, and the movement of the weights 14 is restricted by the vertical beams 16.

[0012] More specifically, the ends 14a on both sides in the lateral direction of the weight 14 are inserted into the recesses 16a of the corresponding vertical beams 16. This restricts the horizontal movement of the weight 14 and prevents the weight 14 from falling off. However, a gap is formed between the ends 14a in the lateral direction of the weight 14 and the wall surface of the recesses 16a of the vertical beams 16 to ensure the ease of loading the weight 14. For this reason, the weights 14 loaded on the weight body frame 13 may be misaligned, and a step of the weight 14 may be formed on the front of the counterweight 4. The elevator counterweight pushing jig and the elevator counterweight pushing method according to the present embodiment are a jig and method for reducing such a step and aligning the weights 14. The front of the counterweight 4 is the surface that is located in front when the pair of vertical beams 16 are viewed in a state where they are lined up to the left and right, and is the surface that faces the inside of the elevator shaft 2. The front of the counterweight 4 may be the surface that faces the car 3.

[0013] Next, a description will be given of a counterweight pushing jig for an elevator according to this embodiment (hereinafter simply referred to as counterweight pushing jig 20). The counterweight pushing jig 20 is a jig for pushing and aligning weights 14 constituting counterweight 4 that rises and falls along weight guide rail 9 of the elevator.

[0014] As shown in FIG. 2, the counterweight pushing jig 20 includes a support tool 30, a pushing tool 50, and a stopper 60.

[0015] First, the support 30 will be described.

[0016] 2, the support 30 is removably attached to the weight guide rail 9. The support 30 is configured to support the pushing tool 50 on the weight guide rail 9. The support 30 may include a pair of side beams 31, a first front beam 32, a second front beam 33, and a support structure 34.

[0017] The side beams 31 are removably attached to the corresponding weight guide rails 9. More specifically, when viewed from the front, the left side beam 31 is attached to the left weight guide rail 9, and the right side beam 31 is attached to the right weight guide rail 9. The side beams 31 may extend perpendicular to the weight guide rails 9 and the longitudinal beam 16. The side beams 31 may extend horizontally. The side beams 31 are attached to the weight guide rails 9 using rail clips 18 (see FIG. 6) and bolts.

[0018] The first front beam 32 is attached to each side beam 31. The first front beam 32 faces the front of the counterweight 4. The first front beam 32 may extend perpendicular to the counterweight guide rail 9 and the longitudinal beam 16. The first front beam 32 may extend horizontally. The first front beam 32 is attached to the side beam 31 using bolts 35.

[0019] The second front beam 33 is attached to each side beam 31. The second front beam 33 faces the front of the counterweight 4. The second front beam 33 is located above the first front beam 32. The second front beam 33 may extend perpendicular to the counterweight guide rail 9 and the longitudinal beam 16. The second front beam 33 may extend horizontally. The second front beam 33 is attached to the side beam 31 using bolts 36 (see FIG. 6).

[0020] The support structure 34 is configured to support the pusher 50. A lower portion of the support structure 34 is attached to the first front beam 32, and an upper portion of the support structure 34 is attached to the second front beam 33. The support structure 34 may include a first support plate 37, second support plates 38A, 38B (see FIG. 3), mounting bolts 39, and support bolts 40 (see FIG. 3).

[0021] As shown in FIG. 2 to FIG. 4, the first support plate 37 is attached to the first front beam 32 and the second front beam 33 of the support 30 on the side opposite to the weight 14. The first support plate 37 abuts against the front of the first front beam 32 and the front of the second front beam 33. The front of the first front beam 32 is the side opposite to the weight 14, and the front of the second front beam 33 is the side opposite to the weight 14. The first support plate 37 extends downward from the first front beam 32 and upward from the second front beam 33. As shown in FIG. 3, a stacking plate 41 is stacked on the center of the first support plate 37. The stacking plate 41 may be located on the side of the weight 14 of the first support plate 37 and joined to the first support plate 37. It is located between the two second support plates 38A and 38B in the vertical direction. A pressing bolt 51 of a pressing tool 50 (described later) penetrates the first support plate 37 and the overlapping plate 41 and is screwed into a nut N1 joined to the overlapping plate 41.

[0022] The second support plates 38A and 38B are located on the side of the weight 14 with respect to the first support plate 37. As shown in FIG. 4, the second support plates 38A and 38B sandwich the first support plate 37 and the first front beam 32 or the second front beam 33 of the support 30. In this embodiment, the support structure 34 includes two second support plates 38A and 38B. One of the second support plates 38A is located below and faces the first front beam 32. The second support plate 38A located below holds the first support plate 37 and the first front beam 32 between them. The other second support plate 38B is located above and faces the second front beam 33 between them. The second support plate 38B located above holds the first support plate 37 and the second front beam 33 between them.

[0023] As shown in FIG. 3 and FIG. 4(a), the mounting bolts 39 are bolts for mounting the first support plate 37 and the second support plate 38A, 38B to the first front beam 32 or the second front beam 33 of the support 30. More specifically, the first support plate 37, the second support plate 38A, and the first front beam 32 are fixed using two mounting bolts 39. As shown in FIG. 4, these mounting bolts 39 are inserted into the bolt hole 37a formed in the first support plate 37, the mounting bolt insertion hole 38Aa formed in the second support plate 38A, and the first mounting hole 32a formed in the first front beam 32, and are fastened with nuts N2. The first support plate 37, the second support plate 38B, and the second front beam 33 are fixed using the other two mounting bolts 39. These mounting bolts 39 are inserted into bolt holes 37a formed in the first support plate 37, mounting bolt insertion holes 38Ba formed in the second support plate 38B, and second mounting holes 33a formed in the second front beam 33, and are fastened with nuts N2.

[0024] As shown in FIG. 3 and FIG. 4(a), the support bolts 40 are bolts for supporting the second support plates 38A and 38B to the first support plate 37. The support bolts 40 do not attach the second support plates 38A and 38B to the first front beam 32 and the second front beam 33 of the support 30. More specifically, the first support plate 37 and the second support plate 38A are attached to each other using two support bolts 40. The second support plate 38A is not attached to the first front beam 32. These support bolts 40 are inserted and fastened to the bolt holes 37b formed in the first support plate 37, the support bolt insertion holes 38Ab formed in the second support plate 38A, and the adapter holes 42a formed in the adapter 42 located below. The adapter 42 located below is interposed between the first support plate 37 and the second support plate 38A. The first support plate 37 and the second support plate 38B are attached to each other using the other two support bolts 40. The second support plate 38B is not attached to the second front beam 33. These support bolts 40 are inserted into bolt holes 37b formed in the first support plate 37, support bolt insertion holes 38Bb formed in the second support plate 38B, and adapter holes 42a formed in an adapter 42 located above, and fastened. The adapter 42 located above is interposed between the first support plate 37 and the second support plate 38B.

[0025] As shown in Fig. 3 and Fig. 4, the support bolt insertion holes 38Ab, 38Bb extend vertically in an elongated shape. Each of the support bolt insertion holes 38Ab, 38Bb is formed as an elongated hole. In the second support plate 38A, the mounting bolt insertion hole 38Aa is located in the upper part of the second support plate 38A, and the support bolt insertion hole 38Ab extends from the upper part to the lower part of the second support plate 38A. In the second support plate 38A, the mounting bolt insertion hole 38Aa is located in the lower part of the second support plate 38A, and the support bolt insertion hole 38Bb extends from the lower part to the upper part of the second support plate 38A.

[0026] 4(b), when the first support plate 37 and the second support plates 38A, 38B are not attached to the first front beam 32 or the second front beam 33 by the above-mentioned mounting bolts 39, the second support plates 38A, 38B can be moved upward and downward. Even in this case, the second support plates 38A, 38B can be supported on the first support plate 37 by the support bolts 40.

[0027] As shown in FIG. 2, the support structure 34 can be attached to the first front beam 32 and the second front beam 33 at a plurality of different positions in the lateral direction. More specifically, the first front beam 32 includes the above-mentioned plurality of first mounting holes 32a formed at a plurality of different positions in the lateral direction. The first mounting holes 32a are formed at different positions in the lateral direction of the first front beam 32. The second front beam 33 includes a plurality of second mounting holes 33a formed at different positions in the lateral direction. The second mounting holes 33a are formed at different positions in the lateral direction. The first support plate 37 and the second support plate 38A, 38B of the support structure 34 can be attached to the first front beam 32 and the second front beam 33 by inserting mounting bolts 39 into any combination of the first mounting holes 32a and the second mounting holes 33a among the plurality of first mounting holes 32a and the plurality of second mounting holes 33a.

[0028] Next, the pusher 50 will be described.

[0029] As shown in Figs. 2 and 3, the pushing tool 50 is supported by the support structure 34 of the support 30 described above. The pushing tool 50 is attached to a portion of the support structure 34 between the first front beam 32 and the second front beam 33. The pushing tool 50 is configured to abut against the front surface of the counterweight 4 and push in the weight 14 (see Fig. 7). The pushing tool 50 is attached to the support 30 so as to be movable in a direction perpendicular to the front surface of the counterweight 4 relative to the first front beam 32 and the second front beam 33 of the support 30. The front surface of the counterweight 4 corresponds to the side surface located on the front side among the side surfaces of the weight 14 loaded on the weight body frame 13. The pushing tool 50 may include a pushing bolt 51, a weight abutment portion 52, and a collar 53.

[0030] The push bolt 51 is screwed into the support structure 34 of the support 30. More specifically, as shown in FIG. 3, the push bolt 51 is screwed into the nut N1 joined to the stacking plate 41 described above. The bolt head 51a (see FIG. 6) of the push bolt 51 is located on the opposite side of the weight 14 with respect to the first support plate 37 of the support structure 34. The bolt head 51a is spaced apart from the first support plate 37. The threaded portion 51b of the push bolt 51 may be formed with a right-handed thread. By holding the bolt head 51a with a tool (not shown) and rotating the push bolt 51 clockwise when viewed toward the weight 14, the push bolt 51 can be advanced relative to the weight 14 and the weight abutment portion 52 can be abutted against the weight 14 (see FIG. 8). On the other hand, by rotating the push bolt 51 counterclockwise, the push bolt 51 can be retracted from the weight 14, and the weight abutment portion 52 can be separated from the weight 14 (see FIG. 9). The threaded portion 51b is not limited to being formed with a right-handed thread, and may be formed with a left-handed thread.

[0031] 3 and 5, weight abutment portion 52 is attached to the tip of push bolt 51. Weight abutment portion 52 is capable of abutting weight body 14 on the front side of counterweight 4. Weight abutment portion 52 is freely rotatable with respect to push bolt 51.

[0032] More specifically, the weight abutment portion 52 includes a cylindrical body 54 and a flange 55 connected to one end of the cylindrical body 54. The cylindrical body 54 includes an abutment surface 54a that can abut against the weight 14. The diameter of the cylindrical body 54 may be larger than the thickness of the weight 14. In this case, the cylindrical body 54 is capable of abutting against a plurality of weights 14. In the example shown in FIG. 7 described later, the cylindrical body 54 is capable of abutting against four weights 14.

[0033] The threaded portion 51b of the press bolt 51, the nut N3, and the washer 56 are inserted into the inside of the cylindrical body 54. The flange 55 includes a flange hole 55a into which a collar 53, which will be described later, is inserted. A gap may be formed between the flange hole 55a and the collar 53. The collar 53 may be thicker than the flange 55. In this way, the weight abutting portion 52 is free to rotate with respect to the press bolt 51.

[0034] The collar 53 includes a collar insertion hole 53a into which the threaded portion 51b of the push bolt 51 is inserted. The threaded portion 51b is inserted into the collar insertion hole 53a. The collar insertion hole 53a does not necessarily have to have a threaded portion formed therein.

[0035] On both sides of the collar 53, nuts N3 and N4 are screwed onto the threaded portion 51b of the push bolt 51. A washer 56 into which the threaded portion 51b of the push bolt 51 is inserted is interposed between the nuts N3 and N4 and the collar 53. The two nuts N3 and N4 are fastened to each other and abut against the end face of the collar 53 via the corresponding washer 56. The washer 56 has a planar shape larger than the collar 53 when viewed in a direction along the central axis of the push bolt 51. The washer 56 can abut against the flange 55 of the weight abutting portion 52. This allows the flange 55 of the weight abutting portion 52 to be held in the region between the two washers 56. In the region between the two washers 56, the weight abutting portion 52 is movable in a direction along the central axis of the push bolt 51 and is freely rotatable relative to the push bolt 51.

[0036] The pushing tool 50 thus configured can be attached to the support 30 at different positions in the lateral direction, as shown in FIG. 2. As described above, the pushing tool 50 is supported by the support structure 34. The support structure 34 can be attached to the first front beam 32 and the second front beam 33 at a plurality of different positions in the lateral direction. The support structure 34 can be attached to the first front beam 32 and the second front beam 33 by inserting the mounting bolt 39 into any combination of the first mounting holes 32a and the second mounting holes 33a formed in the first front beam 32 and the second front beam 33. Therefore, the pushing tool 50 can also be attached to the first front beam 32 and the second front beam 33 by inserting the mounting bolt 39 into any combination of the first mounting holes 32a and the second mounting holes 33a formed in the first front beam 32 and the second front beam 33.

[0037] Next, the stopper 60 will be described.

[0038] As shown in FIG. 6, the stopper 60 is configured to abut against the rear surface of the vertical beam 16 of the weight body frame 13. The stopper 60 abuts against each vertical beam 16. The stopper 60 is supported by the corresponding side beam 31 of the support 30. The stopper 60 is attached to the side beam 31 by using two stopper bolts 61. As shown in FIG. 7, when one of the stopper bolts 61 is removed, the stopper 60 can be separated from the rear surface of the vertical beam 16. In this case, the stopper 60 can be separated from the rear surface of the vertical beam 16 by rotating the attached bolt as a fulcrum.

[0039] Next, a counterweight pressing method using counterweight pressing jig 20 according to the present embodiment configured as described above will be described with reference to Figures 10 to 12. The counterweight pressing method is a method in which counterweights 14 are pressed and aligned using counterweight pressing jig 20 including support tool 30 and pressing tool 50.

[0040] First, as shown in FIG. 10, in step S1, the support tool 30 is attached to the weight guide rail 9, and the pushing tool 50 is supported by the support tool 30 (jig attachment step).

[0041] In the jig attachment process, as shown in FIG. 11, first, the stoppers 60 are attached to each side beam 31 (step S11). Then, the side beams 31 are attached to each weight guide rail 9 (step S12). Then, the first front beam 32 and the second front beam 33 are attached to each side beam 31 (step S13). Then, the support structure 34 is attached to the first front beam 32 and the second front beam 33 (step S14). Then, the pusher 50 is attached to the support structure 34 (step S15). In step S15, the weight abutment portion 52 of the pusher 50 is retracted from the weight body 14 so as not to abut against the weight body 14 (see FIG. 9).

[0042] Step S14 will be described in more detail. First, the second support plate 38A and the second support plate 38B are attached to the first support plate 37 of the support structure 34 using the support bolts 40. Then, as shown in Fig. 4(b), the first support plate 37 is brought into contact with the first front beam 32 and the second front beam 33. At this time, the second support plate 38A is moved downward and the second support plate 38B is moved upward.

[0043] More specifically, since the support bolt insertion hole 38Ab of the second support plate 38A is formed as a long hole extending in the vertical direction, the second support plate 38A is moved downward so that the second support plate 38A is positioned at the top of the support bolt insertion hole 38Ab. This makes it possible to avoid the second support plate 38A from interfering with the first front beam 32. Similarly, since the support bolt insertion hole 38Bb of the second support plate 38B is formed as a long hole extending in the vertical direction, the second support plate 38B is moved upward so that the second support plate 38B is positioned at the bottom of the support bolt insertion hole 38Bb. This makes it possible to avoid the second support plate 38B from interfering with the second front beam 33. In addition, when the first support plate 37 abuts against the first front beam 32 and the second front beam 33, it is possible to prevent the second support plates 38A and 38B from falling off the first support plate 37.

[0044] 4(a), the second support plate 38A is moved upward, and the first support plate 37 and the second support plate 38A are attached to the first front beam 32 with the attachment bolts 39. Similarly, the second support plate 38B is moved downward, and the first support plate 37 and the second support plate 38B are attached to the second front beam 33 with the attachment bolts 39. In this manner, the support structure 34 can be attached to the first front beam 32 and the second front beam 33.

[0045] In step S2 following step S1, as shown in Fig. 10, the counterweight 4 is raised and lowered so that the pushing tool 50 faces the weight body 14 to be pushed (raising and lowering step). More specifically, the height of the counterweight 4 is adjusted so that the weight body 14 to be pushed faces the weight abutment portion 52. In this case, the above-mentioned hoisting machine 6 is driven to raise and lower the counterweight 4.

[0046] In step S3 following step S2, the stopper 60 attached to the side beam 31 is abutted against the rear surface of the vertical beam 16 of the weight main body frame 13 (stopper abutment step). In this case, one of the two stopper bolts 61 is removed (see FIG. 7). This allows the stopper 60 to rotate and abut against the rear surface of the vertical beam 16. After that, the stopper 60 is fixed with the two stopper bolts 61 (see FIG. 6).

[0047] In step S4 following step S3, the push-in tool 50 is brought into contact with the weights 14 of the counterweight 4 in front of the counterweight 4, and the weights 14 are pushed in (pushing-in process). In this case, the bolt head 51a of the push-in bolt 51 is gripped with a tool (not shown) and the push-in bolt 51 is rotated. This causes the push-in bolt 51 and the weight abutment portion 52 attached to the tip of the push-in bolt 51 to advance toward the weights 14 (see FIG. 8). Eventually, the weight abutment portion 52 comes into contact with the multiple weights 14, and when the push-in bolt 51 continues to rotate, the weight abutment portion 52 can push in the multiple weights 14. Each weight 14 moves toward the back side of the counterweight 4 and comes into contact with the wall surface of the recess 16a of the vertical beam 16. At this time, each weight 14 does not move any further, and the pushing-in process is completed. In this manner, a plurality of weights 14 can be pushed into the back side of the counterweight 4 by a single push using the pusher 50.

[0048] In step S5 following step S5, the push-in tool 50 is separated from the weight 14 (push-in tool separating step). In this case, the push-in bolt 51 is rotated in the opposite direction to that in the pushing step. This causes the weight abutment portion 52 to move back away from the weight 14 (see FIG. 9).

[0049] In step S6 following step S5, it is confirmed whether or not there is another weight 14 to be pressed.

[0050] If there is no other weight 14 to be pressed, in step S7, the pressing tool 50 is removed from the support 30, and the support 30 is also removed from the weight guide rail 9 (support removal step). The pressing tool 50 and the support 30 can be removed by reversing the procedure of the jig attachment step in step S1 described above.

[0051] More specifically, in the jig removal step, as shown in Fig. 12, the pushing tool 50 is removed from the support structure 34 (step S21). Then, the support structure 34 is removed from the first front beam 32 and the second front beam 33 (step S22). Then, the first front beam 32 and the second front beam 33 are removed from each side beam 31 (step S23). Then, the side beams 31 are removed from each weight guide rail 9 (step S24). Then, the stoppers 60 are removed from each side beam 31 (step S25).

[0052] When there is another weight 14 to be pressed, as shown in Fig. 10, the stopper 60 is separated from the rear surface of the vertical beam 16 in step S8 (stopper separation step). In this case, one of the two stopper bolts 61 is removed (see Fig. 7). This allows the stopper 60 to be rotated and separated from the rear surface of the vertical beam 16.

[0053] After step S8, the process returns to step S2 described above, and the counterweight 4 is raised and lowered so that the pushing tool 50 faces the other weight body 14 to be pushed (raising and lowering process). More specifically, the height of the counterweight 4 is adjusted so that the other weight body 14 to be pushed faces the weight abutment portion 52.

[0054] Thereafter, the stopper abutment step in step S3 and the pushing step in step S4 described above are performed, and the weight 14 to be pushed is pushed in. As a result, the weight 14 pushed in this step S4 and the weight 14 pushed in the previous step S4 are aligned in front of the counterweight 4, and the step is reduced.

[0055] Thereafter, if there is no other weight 14 to be pressed, the process proceeds to step S6. If there is another weight 14 to be pressed, the process proceeds to step S8, where the step of pressing the weight 14 is repeated until there is another weight 14 to be pressed.

[0056] In this way, the multiple weights 14 are aligned in front of the counterweight 4. By aligning the weights 14, steps between the weights 14 can be eliminated. In an observation elevator, this is effective as an aesthetic measure. Of the multiple weights 14, the weights 14 located at the top may be pushed in manually without using the counterweight pushing jig 20.

[0057] Thus, according to this embodiment, the pushing tool 50 is supported by the support 30 attached to the weight guide rail 9, and the pushing tool 50 is attached to the support 30 so as to be movable in a direction perpendicular to the front surface of the counterweight 4 relative to the support 30. This allows the pushing tool 50 to come into contact with the weights 14 in front of the counterweight 4 and push in the weights 14, and allows the weights 14 to be aligned in front of the counterweight 4. This makes it possible to facilitate the alignment of the weights 14 and improve the safety of the alignment of the weights 14. It also makes it possible to reduce the time required for the alignment.

[0058] Furthermore, according to this embodiment, the pushing tool 50 includes a pushing bolt 51 screwed into the support 30, and a weight abutment portion 52 attached to the tip of the pushing bolt 51. The weight abutment portion 52 is capable of abutting against the weight body 14 on the front side of the counterweight 4. This allows the weight abutment portion 52 to move relative to the support 30 in a direction perpendicular to the front side of the counterweight 4.

[0059] Furthermore, according to this embodiment, weight abutment portion 52 is freely rotatable relative to push bolt 51. As a result, even if push bolt 51 is rotated while weight abutment portion 52 abuts weight body 14, the rotational force of push bolt 51 can be prevented from being transmitted to weight abutment portion 52. This makes it possible to prevent the rotational force of push bolt 51 from being loaded onto weight abutment portion 52. Also, it is possible to avoid an increase in the force required to rotate push bolt 51 due to the frictional force between weight abutment portion 52 and weight body 14, and the operating force of push bolt 51 can be reduced.

[0060] According to this embodiment, the second support plates 38A, 38B of the support structure 34 include support bolt insertion holes 38Ab, 38Bb into which the support bolts 40 for supporting the second support plates 38A, 38B on the first support plate 37 are inserted. The support bolt insertion holes 38Ab, 38Bb extend vertically in an elongated shape. This allows the second support plates 38A, 38B to be moved vertically relative to the first support plate 37 while being supported by the first support plate 37. This makes it possible to prevent the second support plates 38A, 38B from interfering with the first front beam 32 and the second front beam 33 when the first support plate 37 is brought into contact with the first front beam 32 and the second front beam 33. In addition, the second support plates 38A, 38B can be prevented from falling off the first support plate 37. As a result, the installation work of the support structure 34 can be facilitated, and the workability can be improved.

[0061] Furthermore, according to this embodiment, the lower part of the support structure 34 is attached to the first front beam 32, and the upper part of the support structure 34 is attached to the second front beam 33. The pushing tool 50 is attached to a portion of the support structure 34 between the first front beam 32 and the second front beam 33. This makes it possible to prevent the support structure 34 from twisting when the weight 14 is pushed in by the pushing tool 50. This makes it possible to improve the workability of pushing in the weight 14.

[0062] Furthermore, according to this embodiment, the pushing tool 50 can be attached to the support 30 at a plurality of different positions in the lateral direction. As a result, when the weight 14 is inclined with respect to the front surface of the counterweight 4, the attachment position of the pushing tool 50 can be changed according to the protruding position of the weight 14. Therefore, the weight 14 can be pushed in entirely, making it easier to align the weights 14.

[0063] According to this embodiment, the support 30 includes a plurality of first mounting holes 32a and a plurality of second mounting holes 33a formed at a plurality of different positions in the lateral direction. The pushing tool 50 can be attached to the support 30 by inserting a mounting bolt 39 into any one of the plurality of first mounting holes 32a and the plurality of second mounting holes 33a. This allows the pushing tool 50 to be attached to the support 30 at a plurality of different positions in the lateral direction.

[0064] Furthermore, according to this embodiment, the stopper 60 supported by the support 30 abuts against the rear surface of the vertical beam 16 supporting the lateral end of the weight 14. This makes it possible to prevent force from being applied to the guide member of the counterweight 4, which is constituted by a guide shoe or guide rail (not shown), when the weight 14 is pressed in by the pressing tool 50. Furthermore, when the weight 14 is pressed in by the pressing tool 50, the counterweight pressing jig 20 can hold the counterweight 4. Therefore, the pressing tool 50 can effectively press in the weight 14.

[0065] According to this embodiment, the stopper 60 is attached to the support 30 by using two stopper bolts 61 extending in the vertical direction. When one of the stopper bolts 61 is removed, the stopper 60 can be separated from the rear surface of the vertical beam 16. This allows the counterweight 4 to be raised and lowered in a state in which the support 30 is attached to the weight guide rail 9 by separating the stopper 60 from the rear surface of the vertical beam 16. This allows the pressing tool 50 to be easily opposed to the weight body 14 to be pressed, improving the workability of aligning the weight body 14.

[0066] Furthermore, according to this embodiment, after the pushing tool separating step, a lifting step is performed in which the counterweight 4 is raised and lowered to bring the pushing tool 50 into opposition to the weight body 14 to be pushed into. After the lifting step, a pushing step is performed on the weight body 14 to be pushed into. This makes it possible to easily bring the pushing tool 50 into opposition to the weight body 14 to be pushed into. This improves the workability of aligning the weights 14.

[0067] Furthermore, according to this embodiment, before the pushing step, a stopper abutment step is performed in which the stopper 60 attached to the support 30 is abutted against the back surface of the vertical beam 16 supporting the lateral end 14a of the weight 14. After the pushing tool separation step and before the lifting and lowering step, a stopper separation step is performed in which the stopper 60 is separated from the back surface of the vertical beam 16. This allows the counterweight 4 to be lifted and lowered in a state in which the support 30 is attached to the weight guide rail 9. Therefore, the pushing tool 50 can be easily placed opposite the weight 14 to be pushed, improving the workability of aligning the weights 14.

[0068] According to the embodiment described above, the alignment work of the weights 14 can be facilitated and safety can be improved.

[0069] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0070] 1: elevator device, 4: counterweight, 9: counterweight guide rail, 14: counterweight body, 14a: end, 16: vertical beam, 20: counterweight pushing jig, 30: support, 31: side beam, 32: first front beam, 32a: first mounting hole, 33: second front beam, 33a: second mounting hole, 34: support structure, 37: first support plate, 38A: second support plate, 38Ab: support bolt insertion hole, 38B: second support plate, 38Bb: support bolt insertion hole, 39: mounting bolt, 40: support bolt, 50: pushing tool, 51: pushing bolt, 52: counterweight abutment portion, 60: stopper, 61: stopper bolt

Claims

1. A counterweight pushing tool for pushing and aligning weights constituting a counterweight that moves up and down along an elevator guide rail, A support removably attached to the guide rail; a pusher supported by the support and configured to abut against the weight on a front surface of the counterweight to push in the weight; The pushing tool is attached to the support so as to be movable in a direction perpendicular to the front surface of the counterweight relative to the support. Elevator counterweight pushing jig.

2. The pushing tool includes a pushing bolt screwed into the support, and a weight abutment portion attached to a tip end of the pushing bolt and capable of abutting against the weight body on a front side of the counterweight. The elevator counterweight pushing jig according to claim 1.

3. The weight abutment portion is freely rotatable with respect to the push bolt. The elevator counterweight pushing jig according to claim 2.

4. The support includes a pair of side beams attached to the guide rail, a front beam attached to each of the side beams and facing a front surface of the counterweight, and a support structure that supports the pusher, The support structure includes a first support plate attached to the front beam on the side opposite to the weight, a second support plate located on the weight side of the first support plate and sandwiching the first support plate and the front beam, mounting bolts that mount the first support plate and the second support plate to the front beam, and support bolts that support the second support plate to the first support plate but do not mount the second support plate to the front beam, the second support plate includes a support bolt insertion hole into which the support bolt is inserted, The support bolt insertion hole extends vertically in an elongated shape.

3. The elevator counterweight pushing jig according to claim 1 or 2.

5. The support includes a pair of side beams attached to the guide rail, a first front beam attached to each of the side beams and facing a front surface of the counterweight, a second front beam attached to each of the side beams and facing a front surface of the counterweight, the second front beam being located above the first front beam, and a support structure supporting the pusher, A lower portion of the support structure is attached to the first front beam, and an upper portion of the support structure is attached to the second front beam; The pushing tool is attached to a portion of the support structure between the first front beam and the second front beam.

3. The elevator counterweight pushing jig according to claim 1 or 2.

6. The pusher can be attached to the support at a plurality of different positions in the lateral direction.

3. The elevator counterweight pushing jig according to claim 1 or 2.

7. The support includes a plurality of mounting holes formed at different positions in a lateral direction, The pushing tool can be attached to the support by inserting a mounting bolt into any one of the multiple mounting holes. The elevator counterweight pushing jig according to claim 6.

8. The support further includes a stopper that abuts against a rear surface of a vertical beam that supports a lateral end of the weight and is supported by the support.

3. The elevator counterweight pushing jig according to claim 1 or 2.

9. The stopper is attached to the support by using two stopper bolts extending in a vertical direction, When one of the stopper bolts is removed, the stopper can be separated from the rear surface of the vertical beam. The elevator counterweight pushing jig according to claim 8.

10. A counterweight pushing method for pushing and aligning a weight constituting a counterweight that moves up and down along an elevator guide rail by using a counterweight pushing tool including a support tool and a pushing tool, comprising: a jig attachment step of attaching the support tool to the guide rail and supporting the pushing tool on the support tool; a pushing step of pushing the weight by bringing the pushing tool into contact with the weight at a front surface of the counterweight; a pressing tool separating step of separating the pressing tool from the weight; a jig removal process of removing the pushing tool from the support tool and removing the support tool from the guide rail; Equipped with The pushing tool is attached to the support so as to be movable in a direction perpendicular to the front surface of the counterweight relative to the support. How to push in the elevator counterweight.

11. The pressing tool may further include a lifting step of lifting and lowering the counterweight after the pressing tool separating step to make the pressing tool face the other weight body to be pressed, After the lifting and lowering step, the pressing step is performed on the weight body to be pressed. The method for pushing in an elevator counterweight according to claim 10.

12. a stopper abutting step of abutting a stopper attached to the support against a rear surface of a vertical beam supporting a lateral end of the weight before the pushing step; The method further includes a stopper separating step of separating the stopper from the back surface of the vertical beam after the pushing tool separating step and before the lifting step. The method for pushing in an elevator counterweight according to claim 11.

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