Guide-rail height adjustment device

Abstract

To provide a guide-rail height adjustment device capable of improving workability while achieving downsizing and ensuring strength.SOLUTION: A height adjustment device 30 is installed at the bottom end of a guide rail (a second car side guide rail 7b) to guide a car 3 moving up and down in a hoistway 2 of an elevator apparatus 100. The height adjustment device comprises at least one or more adjustment plates 31 arranged between a rail receiver bracket (a second car side rail bracket 15) installed at the bottom of a pit 9 in the hoistway 2 and the bottom end of the guide rail (the second car side guide rail 7b), and comprises an adjustment plate fixing bolt 32 passing through the adjustment plate 31 and restricting the horizontal movement of the adjustment plate 31. The center position of the adjustment plate fixing bolt 32 is located inside the outer circumferential edge part of the rail flange part 7b1 of the second car side guide rail 7b.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a height adjustment device for a guide rail. [Background technology]

[0002] In an elevator system, a car guide rail and a counterweight guide rail are installed in a hoistway. The car and the counterweight that rise and fall in the hoistway move along the car guide rail and the counterweight guide rail, respectively.

[0003] In elevator equipment, if the guide rail height is higher than the design value due to dimensional errors in the building, the guide rail or its mounting parts may interfere with the ceiling, which requires additional work such as cutting the guide rail on-site or re-manufacturing the guide rail.

[0004] Furthermore, if the guide rail height is lower than the design value due to dimensional errors in the building, the car or counterweight may rise too high, causing interference with the mounting parts or the rail to come off, which will result in the additional work of re-manufacturing the guide rail.

[0005] For this reason, an adjustment device for adjusting the lowest end of the guide rail is provided in the pit of the elevator shaft. Patent Document 1, for example, discloses a technique for adjusting the lowest end of the guide rail.

[0006] In Patent Document 1, a fixed base installed at the bottom of the elevator shaft is provided with a bolt whose position can be changed in the vertical direction, and at least one or more compression force transmission members that transmit the load on the guide rail to the bolt. The compression force transmission members are connected by a connecting member. The connecting member is L-shaped or C-shaped, and at least one or more compression force transmission members are sandwiched from both sides according to the shape of the compression force transmission members, and fixed with at least one or more bolts according to the number of compression force transmission members. The lowest end position of the guide rail is adjusted by replacing the compression force transmission members. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 5556595 Summary of the Invention [Problem to be solved by the invention]

[0008] In the technology described in Patent Document 1, the connecting members that sandwich the compression force transmission members from both sides are connected and fixed using bolts in a number corresponding to the number of compression force transmission members, so when there are many compression force transmission members, the bolt tightening work becomes excessive and the workability is poor. Also, in order to make the height adjustment device smaller, it is necessary to consider the arrangement of each part.

[0009] SUMMARY OF THE PRESENT INVETION The object of the present invention is to provide a guide rail height adjustment device which overcomes the above problems, is compact, ensures strength, and improves ease of use. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the present invention provides a guide rail height adjustment device installed at the lower end of a guide rail that guides each of a car and a counterweight that rises and falls in a hoistway of an elevator apparatus, comprising at least one adjustment plate arranged between a rail support bracket installed at the bottom of a pit in the hoistway and the lower end of the guide rail, and an adjustment plate fixing bolt that penetrates the adjustment plate and regulates the horizontal movement of the adjustment plate, wherein the center position of the adjustment plate fixing bolt is positioned inside the outer peripheral end of the flange portion of the guide rail. Effect of the Invention

[0011] According to the present invention, it is possible to provide a guide rail height adjustment device that is compact, has sufficient strength, and has improved operability. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic configuration diagram of an elevator device 100 according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the elevator device 100 as viewed from above. [Diagram 3] This is a plan view of the car side pit base 10A seen from above. [Figure 4] This is an enlarged plan view of a portion of the car side pit base 10A and a portion of the weight side pit base 10B. [Diagram 5] 1 is a side view of a car side pit base 10A and a second car side rail support bracket 22 before an adjustment plate is installed in accordance with the first embodiment of the present invention. FIG. [Figure 6] 1 is a side view of a car side pit base 10A and a second car side rail support bracket 22 after an adjustment plate is installed in accordance with the first embodiment of the present invention. FIG. [Figure 7] FIG. 2 is a front view of the second car-side rail support bracket 22 after the adjustment plate has been installed according to the first embodiment of the present invention. [Figure 8] 8 is a front view of the second car-side rail support bracket 22 in a state in which the number of adjustment plates is changed from the state in FIG. 7. FIG. [Figure 9] 11 is an enlarged plan view showing a portion of a car side pit base 10A and a portion of a second car side rail support bracket 22 according to a second embodiment of the present invention. FIG. [Figure 10] 11 is a side view of the car side pit base 10A and the second car side rail support bracket 22 after the height adjustment device 30 according to the second embodiment of the present invention has been installed. FIG. [Figure 11] 11 is an enlarged plan view showing a portion of a car side pit base 10A and a portion of a second car side rail support bracket 22 according to a third embodiment of the present invention. FIG. [Figure 12] 11 is a side view of the car side pit base 10A and the second car side rail support bracket 22 after the height adjustment device 30 according to the third embodiment of the present invention has been installed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In principle, the same elements are given the same reference numerals in all drawings. Furthermore, explanations of parts having the same functions will be omitted. Note that the configurations described below are merely examples, and it is not intended that the embodiment of the present invention is limited to the specific embodiments described below. EXAMPLES

[0014] Fig. 1 is a schematic diagram of an elevator device 100 according to an embodiment of the present invention. As shown in Fig. 1, the elevator device 100 is generally composed of a car 3 and a counterweight 4 that ascend and descend in a hoistway 2 formed in a building 1, a hoist 5 installed at the top of the hoistway 2, a main rope 6 wound around a sheave of the hoist 5, one end of which is connected to the car 3 and the other end of which is connected to the counterweight 4, a car-side guide rail 7 that guides the ascending and descending of the car 3, a weight-side guide rail 8 that guides the ascending and descending of the counterweight 4, a car shock absorber (not shown) that is provided in a pit base 10 installed in a pit 9 at the bottom of the hoistway 2 and that absorbs the impact when the car 3 collides during an abnormal descent of the car 3 and the counterweight 4, and a counterweight shock absorber 11 that absorbs the impact when the counterweight 4 collides. The car side guide rail 7 and the weight side guide rail 8 have their upper ends fixed to the ceiling of the elevator shaft 2 and their lower ends fixed to the pit base 10 via rail support brackets (first car side rail support bracket 21, second car side rail support bracket 22, first weight side rail support bracket 23, second weight side rail support bracket 24).

[0015] 2 is a plan view of the elevator device 100 seen from above. A wall 2a of the hoistway 2 is provided with a first car-side guide rail 7a fixed via a first car-side rail bracket 14, a second car-side guide rail 7b fixed via a second car-side rail bracket 15, a first weight-side guide rail 8a fixed via a first weight-side rail bracket 16, and a second weight-side guide rail 8b fixed via a second weight-side rail bracket 17. The second car-side rail bracket 15 and the second weight-side rail bracket 17 may be shared to serve as a car-side and weight-side shared rail bracket.

[0016] The car 3 is guided by a first car-side guide rail 7a and a second car-side guide rail 7b to rise and fall in the hoistway 2. The counterweight 4 is guided by a first weight-side guide rail 8a and a second weight-side guide rail 8b to rise and fall in the hoistway 3. The car 3 is also provided with a door 3a that can be opened and closed.

[0017] Fig. 3 is a plan view of the car-side pit base 10A seen from above. Fig. 4 is an enlarged plan view of a part of the car-side pit base 10A and a part of the weight-side pit base 10B. In Fig. 3, the car-side pit base 10A is shown as the pit base 10, but the weight-side pit base 10B has the same configuration.

[0018] A pit base 10 is installed in the pit 9 at the bottom of the elevator shaft 2. The pit base 10 includes a car side pit base 10A that is installed to connect the first car side guide rail 7a and the second car side guide rail 7b, and a weight side pit base 10B that is installed to connect the first weight side guide rail 8a and the second weight side guide rail 8b. As shown in Fig. 4, the car side pit base 10A and the weight side pit base 10B are installed so as to be perpendicular to each other.

[0019] The first car-side guide rail 7a and the second car-side guide rail 7b are arranged to face each other across the car-side pit base 10A. Similarly, the first weight-side guide rail 8a and the second weight-side guide rail 8b are arranged to face each other across the weight-side pit base 10B.

[0020] A first car side rail support bracket 21 and a second car side rail support bracket 22 are connected to both ends of the car side pit base 10A, respectively. The first car side rail support bracket 21 is disposed so as to support the lower side of the first car side guide rail 7a, and the second car side rail support bracket 22 is disposed so as to support the lower side of the second car side guide rail 7b.

[0021] A first weight-side rail support bracket 23 and a second weight-side rail support bracket 24 are connected to both ends of the weight-side pit base 10B. The first weight-side rail support bracket 23 is disposed to support the lower part of the first weight-side guide rail 8a, and the second weight-side rail support bracket 24 is disposed to support the lower part of the second weight-side guide rail 8b.

[0022] As shown in Figure 4, the second car side rail support bracket 22 and the second weight side rail support bracket 24 are positioned close to each other, so that a cutout portion 24a is formed in the second weight side rail support bracket 24 to avoid interference with the second car side rail support bracket 22.

[0023] In this embodiment, rail support brackets are used at both ends of the car side pit base 10A and at both ends of the weight side pit base 10B. Since the rail support brackets have the same configuration, the following explanation will describe the second car side rail support bracket 22 as a representative. Furthermore, since the configuration of the height adjustment device 30 installed on the rail support brackets is also the same, the following explanation will describe the height adjustment device 30 installed on the second car side rail support bracket 22 as a representative.

[0024] Fig. 5 is a side view of the car side pit base 10A and the second car side rail support bracket 22 before the height adjustment device 30 according to the first embodiment of the present invention is installed. Fig. 6 is a side view of the car side pit base 10A and the second car side rail support bracket 22 after the height adjustment device 30 according to the first embodiment of the present invention is installed. Fig. 7 is a front view of the second car side rail support bracket 22 after the height adjustment device 30 according to the first embodiment of the present invention is installed. Fig. 8 is a front view of the second car side rail support bracket 22 in a state in which the number of adjustment plates is changed from the state in Fig. 7.

[0025] The second car-side rail support bracket 22 is formed in a U-shape when viewed from the side, and includes a flat bottom portion 22a that contacts the bottom of the pit 9, a first rising portion 22b that extends upward from the flat bottom portion 22a and connects to the car-side pit base 10A, and a second rising portion 22c that extends upward from the flat bottom portion 22a and connects to the second car-side guide rail 7b. The second rising portion 22c is configured to be longer (higher) than the first rising portion 22b.

[0026] At both ends of the car side pit base 10A, pit base flange portions 10A1 are formed which are bent at right angles from the longitudinal direction of the car side pit base 10A and extend outward.

[0027] The pit base flange portion 10A1 is opposed to the first rising portion 22b of the second car-side rail support bracket 22, a bolt 25 is placed so as to pass through the pit base flange portion 10A1 and the first rising portion 22b, and a nut 26 is placed on the passing bolt 25 and tightened to fix the pit base flange portion 10A1 and the first rising portion 22b. This connects and fixes the car-side pit base 10A and the second car-side rail support bracket 22.

[0028] The rail flange portion 7b1 of the second car side guide rail 7b is opposed to the second rising portion 22c of the second car side rail support bracket 22, a bolt 27 is arranged so as to pass through the rail clip 29 and the second rising portion 22c, and a nut 28 is arranged on the passing bolt 27 and tightened to fix the second car side guide rail 7b via the first rising portion 22b and the rail clip 29. The second car side guide rail 7b is fixed to the second car side rail support bracket 22 by pressing the rail flange portion 7b1 with the rail clip 29.

[0029] In elevator equipment, if the guide rail height is higher than the design value due to dimensional errors in the building, the guide rail or its mounting parts may interfere with the ceiling, which requires additional work such as cutting the guide rail on-site or re-manufacturing the guide rail.

[0030] Furthermore, if the guide rail height is lower than the design value due to dimensional errors in the building, the car or counterweight may rise too high, causing interference with the mounting parts or the rail to come off, which will result in the additional work of re-manufacturing the guide rail.

[0031] Therefore, in this embodiment, a height adjustment device 30 is provided to adjust the lowest end of the guide rail. The height adjustment device 30 is arranged between the lower end of the second car-side guide rail 7b and the flat bottom 22a of the second car-side rail support bracket 22, and is composed of a metal adjustment plate 31 having a predetermined thickness, an adjustment plate fixing bolt 32 that passes through a through hole 31a formed in the adjustment plate 31 and is screwed into a bolt fastening hole 22h formed in the flat bottom 22a of the second car-side rail support bracket 22, and an adjustment plate fixing nut 33 that has a spiral groove formed on the inside of a cylinder and is screwed into the spiral groove on the outer periphery of the adjustment plate fixing bolt 32. The adjustment plate fixing bolt 32 is fixed to the second car-side rail support bracket 22 by having its tip screwed into the bolt fastening hole 22h, and regulates the horizontal movement of the adjustment plate 31. The adjustment plate fixing nut 33 is screwed into a spiral groove on the outer periphery of the adjustment plate fixing bolt 32 to restrict the movement of the adjustment plate 31 in the up-down direction (vertical direction).

[0032] When installing the guide rails, first the guide rails are arranged for on-site installation based on the height dimensions of the elevator shaft on the design drawings. The number of adjustment plates used to adjust the gap between the bottom end of the guide rail and the rail support bracket is set as a standard value in advance (for example, the length of the guide rail is designed and arranged for on-site installation based on the standard value of 10 plates installed).

[0033] At the site where the guide rails are to be installed, a laser measuring device or similar is used to measure the exact height of the elevator shaft. If the gap between the bottom end of the guide rail and the rail support bracket is larger than the dimensions shown on the design drawings, the number of adjustment plates is added. Conversely, if the gap between the bottom end of the guide rail and the rail support bracket is smaller than the dimensions shown on the design drawings, the number of adjustment plates is reduced (adjustment plates are removed). Figures 7 and 8 show examples of changing the number of adjustment plates 31.

[0034] Then, the guide rails are erected from the top of the adjustment plates whose number has been adjusted. In this embodiment, at least one adjustment plate is used to adjust the gap. The lower end of the guide rail is supported by the adjustment plate 31, and the adjustment plate 31 is subjected to a compressive load from the guide rail.

[0035] The width dimension of the adjustment plate 31 (left-right direction on the paper in Figs. 7 and 8) is formed larger than the width dimension of the second car-side guide rail 7b, but is preferably made as small as possible to avoid interference with the weight-side guide rail 8b. The adjustment plate 31 is formed with a through hole 31a for passing the adjustment plate fixing bolt 32, but if the through hole 31a is formed close to the end of the adjustment plate 31 in the width direction, the strength of the adjustment plate 31 may be weakened.

[0036] Therefore, in this embodiment, the through hole 31a is formed closer to the second car-side guide rail 7b (inner side). As shown in Fig. 4, Fig. 7 and Fig. 8, the center line L of the adjustment plate fixing bolt 32 is disposed closer to the inner side than the outer peripheral end of the rail flange portion 7b1 of the second car-side guide rail 7b. In other words, the center position of the adjustment plate fixing bolt 32 is disposed closer to the inner side than the rail flange portion 7b1.

[0037] According to this embodiment, by adjusting the number of adjustment plates in accordance with the dimensional error of the building, the guide rail height adjustment work can be easily performed, improving workability.

[0038] Furthermore, according to this embodiment, by being configured as described above, it is possible to provide a height adjustment device that is compact, has sufficient strength, and has improved operability. EXAMPLES

[0039] Next, a second embodiment will be described with reference to Figs. 9 and 10. Fig. 9 is an enlarged plan view of a part of the car side pit base 10A and a part of the second car side rail support bracket 22 according to the second embodiment of the present invention. Fig. 10 is a side view of the car side pit base 10A and the second car side rail support bracket 22 after the height adjustment device 30 according to the second embodiment of the present invention has been installed. The same reference numerals are used for the configurations common to the first embodiment, and detailed descriptions thereof will be omitted.

[0040] In the second embodiment, a bottom plate 34 is provided below the adjustment plate 31. The bottom plate 34 is formed with a bolt fastening hole 34h that screws into the adjustment plate fixing bolt 32. In the second embodiment, the flat bottom 22a of the second car-side rail support bracket 22 is not formed with a bolt fastening hole.

[0041] In addition, the outer periphery of the bottom plate 34 is formed larger so as to protrude than the outer periphery of the adjustment plate 31. That is, the bottom plate 34 is formed longer so as to protrude toward the car-side pit base 10A, and has a wider width than the adjustment plate 31.

[0042] The tip portion 25a of the bolt 25 that fastens the car side pit base 10A and the second car side rail support bracket 22 protrudes from the end face of the nut 26, and a fixing portion C1 is formed by the outer periphery of the bolt 25 and the end face of the nut 26. A corner of the bottom plate 34 is positioned at this fixing portion C1. The horizontal movement of the bottom plate 34 is restricted by the fixing portion C1 and the second car side rail support bracket 22.

[0043] Furthermore, by restricting the horizontal movement of the bottom plate 34, the horizontal movement of the adjustment plate 31 fixed by the adjustment plate fixing bolts 32 is also restricted.

[0044] According to the second embodiment, in addition to the effects of the first embodiment, the horizontal movement of the adjustment plate 31 is restricted, so that the workability of installing the height adjustment device 30 can be improved. EXAMPLES

[0045] Next, a third embodiment will be described with reference to Figs. 11 and 12. Fig. 11 is an enlarged plan view of a part of the car side pit base 10A and a part of the second car side rail support bracket 22 according to the third embodiment of the present invention. Fig. 12 is a side view of the car side pit base 10A and the second car side rail support bracket 22 after the height adjustment device 30 according to the third embodiment of the present invention has been installed. The same reference numerals are used for the configurations common to the first and second embodiments, and detailed descriptions thereof will be omitted.

[0046] In the third embodiment, a container-shaped oil receiver 36 is provided below the lowest plate 34. The lowest plate 34 is formed with a bolt fastening hole 34h into which the adjustment plate fixing bolt 32 is screwed.

[0047] The guide rail is coated with oil to smooth the movement of the car and the counterweight. The coated oil falls due to gravity, and the fallen oil may accumulate at the bottom of the pit 9. Therefore, in this embodiment, an oil pan 36 is provided below the second car-side guide rail 7b to receive the fallen oil.

[0048] The oil pan 36 is placed on the flat bottom 22a of the second car side rail support bracket 22, and the bottom plate 34 is placed on the oil pan 36. The bolt fastening holes 34h are formed only in the bottom plate 34, and are not formed in the oil pan 36 or the flat bottom 22a of the second car side rail support bracket 22. For this reason, the dropped oil does not leak out from the bottom of the oil pan.

[0049] The bottom plate 34 is formed longer so as to protrude toward the car-side pit base 10A compared to the adjustment plate 31. The bottom plate 34 is in contact with the inner wall of the oil pan 36.

[0050] The tip portion 25a of the bolt 25 that fastens the car side pit base 10A and the second car side rail support bracket 22 protrudes from the end face of the nut 26, and a fixing portion C2 is formed by the outer periphery of the bolt 25 and the end face of the nut 26. The corner portion of the oil pan 36 is positioned at this fixing portion C2. The horizontal movement of the oil pan 36 is restricted by the fixing portion C2 and the second car side rail support bracket 22.

[0051] Furthermore, by restricting the horizontal movement of the oil pan 36, the horizontal movement of the bottom plate 34 is restricted, and further the horizontal movement of the adjustment plate 31 is also restricted.

[0052] According to the third embodiment, in addition to the effects of the first and second embodiments, the oil dropping from the second car-side guide rail can be received, and dirt in the pit can be suppressed.

[0053] The present invention is not limited to the above-mentioned embodiment, and various modifications are included. For example, the above-mentioned embodiment has been described in detail to easily explain the present invention, and is not necessarily limited to those including all of the configurations described. Also, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Also, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. [Explanation of symbols]

[0054] 100... elevator device, 1... building, 2... elevator shaft, 2a... wall, 3... car, 4... counterweight, 5... hoist, 6... main rope, 7... car side guide rail, 7a... first car side guide rail, 7b... second car side guide rail, 7b1... rail flange portion, 8... weight side guide rail, 8a... first weight side guide rail, 8b... second weight side guide rail, 9... pit, 10... pit base, 10A... car side pit base, 10A1... pit base flange portion, 10B... weight side pit base, 11... counterweight buffer device, 14... first car side rail bracket, 15... second car side rail bracket, 16... first weight side rail bracket bracket, 17...second weight-side rail bracket, 21...first car-side rail support bracket, 22...second car-side rail support bracket, 22a...flat bottom, 22b...first rising portion, 22c...second rising portion, 22h...bolt fastening hole, 24...second weight-side rail support bracket, 24a cutout portion, 25...bolt, 25a...tip portion, 26...nut, 27...bolt, 28...nut, 29...rail clip, 30...height adjustment device, 31...adjustment plate, 31a...through hole, 32...adjustment plate fixing bolt, 33...adjustment plate fixing nut, 34...bottom plate, 34h...bolt fastening hole, 36...oil receiver, C1...fixing portion, C2...fixing portion

Claims

1. A height adjustment device for a guide rail is provided at the lower end of a guide rail that guides a car and a counterweight that move up and down in a hoistway of an elevator apparatus, At least one adjustment plate is disposed between a rail support bracket installed at the bottom of the pit of the elevator shaft and a lower end of the guide rail, and an adjustment plate fixing bolt penetrates the adjustment plate and restricts horizontal movement of the adjustment plate, 2. A height adjustment device for a guide rail, comprising: a fixing bolt for fixing the adjustment plate, the fixing bolt being disposed inwardly of an outer peripheral end of the flange portion of the guide rail;

2. 2. The guide rail height adjustment device according to claim 1, 2. A guide rail height adjustment device, comprising: a rail support bracket having a flat bottom surface and a bolt fastening hole formed therein; and a bolt fastening hole formed in the flat bottom surface of the rail support bracket.

3. The guide rail height adjustment device according to claim 2, A guide rail height adjustment device, characterized in that an adjustment plate fixing nut that regulates the vertical movement of the adjustment plate is screwed onto the adjustment plate fixing bolt.

4. 2. The guide rail height adjustment device according to claim 1, A bottom plate is provided between the adjustment plate and the rail support bracket, the outer periphery of the lowermost plate is formed to protrude beyond the outer periphery of the adjustment plate, A guide rail height adjustment device characterized in that the corners of the bottom plate are prevented from moving horizontally by fixing parts formed by bolts and nuts that fix the rail support bracket to a pit base located at the bottom of the elevator pit.

5. The guide rail height adjustment device according to claim 4, 2. A guide rail height adjustment device, comprising: a lower plate for adjusting a height of the guide rail; a lower plate for adjusting the height of the guide rail;

6. 2. The guide rail height adjustment device according to claim 1, a bottom plate disposed below the adjustment plate; and an oil pan disposed between the bottom plate and the rail support bracket for receiving oil dropping from the guide rail, The outer periphery of the lowermost plate is formed to protrude beyond the outer periphery of the adjustment plate and contacts the inner wall of the oil receiver, A guide rail height adjustment device characterized in that horizontal movement of the corners of the oil receiver is restricted by fixing parts formed by bolts and nuts that fix the rail support bracket to a pit base located at the bottom of the elevator shaft pit.

7. 7. The guide rail height adjustment device according to claim 6, 2. A guide rail height adjustment device, comprising: a lower plate for adjusting a height of the guide rail; a lower plate for adjusting the height of the guide rail;

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