Guide rail fastening device

Abstract

Guide rail fastening device (100) comprising: a rail holder (5) for contacting a bottom surface of a base (4a) of a guide rail (4) placed in a lowest portion of a plurality of guide rails (4) to be arranged conformally in an elevator shaft; a first rail clamp for clamping the base (4a) of the guide rail (4) in cooperation with the rail holder (5); and a friction plate (14) for contacting the underside of the base (4a) of the guide rail (4) placed in the lowest section, wherein a lower end of the friction plate (14) is in contact with an upper end of the rail holder (5), wherein the friction plate (14), in cooperation with a second rail clamp (10), clamps the base (4a) of the guide rail (4) placed in the lowest section.

Description

Technical area

[0001] The present invention relates to a guide rail fastening device for an elevator. Technological background

[0002] In an elevator shaft, a pair of guide rails for guiding both an elevator car and a counterweight for ascending and descending are installed or installed across the entire ascending / descending distance of the elevator car and the counterweight. Each guide rail is fixed to a beam or wall-side bracket installed or installed on a shaft inner wall with guide rail fixing devices, each of which consists of a rail bracket, a rail holder, a screw or bolt, a nut, and a spring washer (see, for example, Patent Document 1 and Patent Document 2).

[0003] Also, the guide rail installed in a high-rise building may be bent or bucked for deformation when thermal shrinkage of the building's steel frame, concrete contraction due to its creep phenomenon, interlayer displacement, or uneven settlement caused by weight increase due to installation of air conditioners or the like occurs. To solve this problem, a guide rail fixing device is known (see, for example, Patent Document 3) that fixes the guide rail in such a way that a space is provided between the lowest end of the guide rail and the bottom of the shaft to prevent the guide rail from deforming. Prior art documentsPatent document Patent Document 1: JP H06- 239 559 A (page 2, Fig. 1) Patent Document 2: JP H06- 255 941 A (page 5, Fig. 2) Patent Document 3: JP H03- 72 578 U (page 6, Fig. 5) Patent document 4: DE 11 2012 006 051 T5 Summary of the inventionProblem to be solved by the invention

[0004] In cases where a conventional guide rail fastening device contains design flaws in a guide rail or rail clamp, sufficient frictional force is sometimes not generated between the guide rail and the guide rail fastening device. In this case, if the building equipped with an elevator is rocked significantly by an earthquake or strong wind, the guide rail could fall off.

[0005] Installing more guide rail fixing devices may increase the number of guide rail fixing points, resulting in increased friction between the guide rail and the guide rail fixing devices. However, considering that the guide rail fixing devices are attached to beams or wall-side brackets installed on a shaft inner wall, the increased number of guide rail fixing points increases the number of beams or wall-side brackets that need to be installed on the shaft inner wall, resulting in building installation costs.

[0006] The present invention has been made to solve the problems described above and to provide a guide rail fixing device that can increase the frictional force against the guide rail without increasing the number of brackets or wall-side holders to be installed on the shaft inner wall. Means of solving the problem

[0007] A guide rail fastening device according to the present invention is defined in claim 1. Effects of the invention

[0008] According to the present invention, the friction force between the guide rail and the guide rail fixing device can be increased without increasing the number of brackets or wall-side holders to be installed on the shaft inner wall. Short description of the drawings Fig. 1 shows a cross-section of an elevator shaft in a plan view. Fig. 2 is a diagram for explaining a guide rail mounting method according to a carrier mounting method. Fig. 3 is a diagram for explaining a guide rail mounting method according to a wall mounting method. Fig. 4 is a schematic diagram showing a guide rail and a guide rail fixing device for fixing the guide rail in a shaft according to Embodiment 1 of the present invention. Fig. 5 shows a front view of the Fig. 4 shown guide rail fastening device. Fig. 6 shows a side view of the Fig. 4 shown guide rail fastening device. Fig. 7 is a schematic diagram of the guide rail fixing device according to Embodiment 1, which is arranged in the lowest section for fixing the guide rail. Fig. 8 shows a front view of the Fig. 7 shows the guide rail fastening device. Fig. 9 shows a side view of the Fig. 7 shows the guide rail fastening device. Embodiment for carrying out the inventionEmbodiment 1

[0009] Fig. 1 illustrates a cross-section of an elevator shaft 1 in a plan view. In the shaft 1, a pull-out car 2 and a counterweight 3 are suspended by a cable (not illustrated). Guide rails 4 are provided in pairs to sandwich both the pull-out car 2 and the counterweight 3, and are installed across the entire ascending / descending range of the pull-out car 2 and the counterweight 3. Furthermore, each of the guide rails 4 is configured by arranging and securing a plurality of guide rails 4 in a compliant or aligned manner ("in line") across the entire ascending / descending range of the pull-out car 2 and the counterweight 3.

[0010] Fig. 2 is a diagram for explaining a method of assembling the guide rails 4 according to a beam assembling method. In the beam assembling method, each of the guide rails 4 is fixed to a beam 7 via a rail holder 5 and a base plate 6. The rail holder 5 is a steel member consisting of a horizontal part 5a and a vertical part 5b extending continuously and vertically upward from the horizontal part 5a to have an L-shaped cross section. The vertical part 5b contacts the guide rail 4. The base plate 6 is a plate member welded and fixed to the lower side of the horizontal part 5a of the rail holder 5. A plurality of beams 7, for example, H-shaped steel sections, are installed vertically and separately from each other on an inner wall 1a of the shaft 1 so that flanges 7a of the H-shaped steel sections are oriented horizontally.The upper side of the flange 7a, positioned on the upper side of each support 7, is welded and fixed to the lower side of the corresponding base plate 6.

[0011] Tabs 8 are provided between the guide rails 4 to suppress vibration caused when the pull-out car 2 or the counterweight 3 ascends or descends to pass through the level difference between the guide rails 4.

[0012] Fig. 3 is a diagram for explaining a method of mounting the guide rails 4 according to a wall mounting method. In the wall mounting method, each of the guide rails 4 is fixed to the inner wall 1a of the shaft 1 via the rail holder 5 and a wall-side holder 9. The rail holder 5 used here is the same as the rail holder 5 used in the beam mounting method, and the vertical part 5b is in contact with the guide rail 4. The wall-side holder 9 is a steel member consisting of a horizontal part 9a and a vertical part 9b that continuously and vertically extends downward from the horizontal part 9a to have an L-shaped cross section. The horizontal part 9a is welded and fixed to a lower side of the horizontal part 5a of the rail holder 5. The vertical part 9b is fixed to the inner wall 1a of the shaft 1 with an anchor bolt (not illustrated).

[0013] Also in the wall mounting method, similarly to the beam mounting method, tabs 8 are provided between the guide rails 4 for suppressing vibration caused when the pull-out car 2 or the counterweight 3 ascends or descends to pass through the level difference between the guide rails 4.

[0014] A guide rail fastening device 100 according to this embodiment is manufactured using the Fig. 4 to 9. An explanation of the support mounting method will be given below, and the same explanation is applicable to the wall mounting method.

[0015] Fig. 4 illustrates a schematic diagram of the guide rail 4 and the guide rail fixing device 100 for fixing the guide rail 4 in the shaft 1 according to this embodiment. Fig. 5 shows a front view of the Fig. 4. Fig. 6 shows a side view of the Fig. 4.

[0016] The guide rail 4 consists of a base 4a and a sliding part 4b extending vertically from the center of the base 4a, forming a T-shaped cross section. The guide rail 4 is arranged such that the base 4a is close to the inner wall 1a of the shaft 1 and the sliding part 4b is close to the pull-out car 2 or the counterweight 3. The guide rail 4 is fixed in the shaft 1 using the guide rail fixing device 100, which has the configuration shown below.

[0017] As in the Fig. 4 to 6, the guide rail fastening device 100 includes the rail holder 5, rail clamps 10, bolts 11, nuts 12, and spring washers 13. The vertical part 5b of the rail holder 5 contacts the bottom surface of the base 4a of the guide rail 4, which faces the inner wall 1a of the shaft 1. The rail clamps 10 contact two ends of the base 4a of the guide rail 4 in a width direction. The bolts 11, the nuts 12, and the spring washers 13 are used when fastening the guide rail 4 to fix the rail clamps 10 to the rail holder 5, with both ends of the base 4a in the width direction being held clamped by the rail clamps 10 and the rail holder 5.The vertical part 5b of the rail holder 5 and the rail clamps 10 each have a bolt hole (not shown) through which the bolt 11 is inserted to fasten them together.

[0018] Fig. 7 illustrates a schematic diagram of a guide rail fixing device 100 for fixing the guide rail 4 placed in the lowest portion according to this embodiment. Fig. 8 shows a front view of the Fig. 7. Fig. 9 shows a side view of the Fig. 7.

[0019] As in the Fig.As shown in Figures 7 to 9, the guide rail fastening device 100 includes a rail holder 5, rail clamps 10, bolts 11, nuts 12, spring washers 13, and a friction plate 14. The friction plate 14 has a rectangular shape whose long side is longer than the width of the base 4a of the guide rail 4. The friction plate 14 contacts the underside of the base 4a of the guide rail 4, which faces the inner wall 1a of the shaft 1. The lower end of the friction plate 14 contacts the upper end of the vertical part 5b of the rail holder 5. In a state in which ends of the base 4a of the guide rail 4 are clamped in a width direction by the rail clamps 10 and the friction plate 14, the friction plate 14 is fixed to the rail clamps 10 with the bolts 11, nuts 12 and spring washers 13.The friction plate 14 and the rail clamp 10 each have a bolt hole (not shown) through which the bolt or screw 11 is inserted to fasten them together. The rail clamps 10, which clamp the base 4a of the guide rail 4 in cooperation with the friction plate 14, are the same components as the rail clamps 10 that clamp the base 4a in cooperation with the rail holders 5. Also, the bolts 11, nuts 12, and spring washers 13 used to fasten the rail clamps 10 to the friction plate 14 are the same as the bolts 11, nuts 12, and spring washers 13 used to fasten the rail clamps 10 to the rail holder 5.

[0020] When a vertically downward force acts on the guide rail 4 fixed by the guide rail fixing device 100 according to this embodiment, the guide rail 4 is held by a frictional force between the guide rail 4 and the friction plate 14, which is placed at a position higher than the rail holder 5 and in contact with the upper end of the vertical part 5b. Therefore, the guide rail 4 can be prevented from falling off.

[0021] It is preferable that the friction plate 14 be formed of a plate member having a friction coefficient greater than that of the rail holder. If the material of the friction plate 14 is the same as that of the rail holder 5, it is preferable that roughness is created on a side of the friction plate that is in contact with the base 4a of the guide rail 4 to increase the vertical friction coefficient. This can increase the friction force between the guide rail 4 and the guide rail fixing device 100.

[0022] It should be noted that, instead of being provided only for the guide rail fastening device 100 that secures the lowermost guide rail 4, the friction plate 14 could be provided for each guide rail fastening device 100 or for any number of the guide rail fastening devices 100. By adjusting the number of friction plates 14 to be provided, the friction force between the guide rails 4 and the guide rail fastening devices 100 can be adjusted.

[0023] As described above, in the guide rail fixing device 100 according to this embodiment, the friction plate 14 is provided at a position higher than that of the rail holder 5 that fixes the lowermost guide rail 4, so that the friction plate 14 contacts the upper end of the vertical part 5b to increase the friction force against the guide rail 4. This can prevent the guide rail 4 from falling off without increasing the number of installed rail holders 5.

[0024] Furthermore, in the fastening device 100 according to this embodiment, the friction coefficient of the side of the friction plate 14 in contact with the bottom surface of the base 4a of the guide rail 4 is larger than that of the side of the rail holder 5 in contact with the same bottom surface, which can thereby prevent the guide rail 4 from falling off without increasing the number of the rail holders 5.

[0025] Furthermore, since the guide rail fixing device 100 according to this embodiment can increase the frictional force against the guide rail 4 without increasing the number of installed rail holders 5, it is not necessary to increase the number of brackets 7 or wall-side holders 9 to be fixed to the inner wall 1a of the shaft 1, so that the guide rail 4 can be prevented from falling off without increasing the installation cost.

[0026] Furthermore, the guide rail fixing device 100 according to this embodiment uses the same parts as the rail clamp 10, the bolt 11, the nut 12, and the spring washer 13 used to fix the guide rail 4 in the shaft 1, to increase the frictional force against the guide rail 4. This can prevent the manufacturing cost and installation cost from increasing due to the number of parts, which might increase.

[0027] Furthermore, the guide rail fastening device 100 according to this embodiment includes the rail holder 5, which is in contact with the bottom surface of the base 4a of the guide rail 4 placed in the lowest section among a plurality of guide rails 4 conformably arranged in the elevator shaft 1, and the rail clamps 10, which clamp the base 4a of the guide rail 4 in cooperation with the rail holders 5. Furthermore, the guide rail fastening device 100 includes the friction plate 14, which is in contact with the bottom surface of the base 4a of the guide rail 4 placed in the lowest section, and which is in contact with the upper end of the rail holder 5 to clamp the base 4a of the guide rail 4 placed in the lowest section in cooperation with the rail clamps 10.With such a configuration, the guide rail fixing device 100 according to this embodiment can have an increased frictional force against the guide rail 4 without increasing the number of the supports 7 or the wall-side holders 9 fixed to the inner wall 1a of the shaft 1.

[0028] Furthermore, in the guide rail fixing device 100 according to this embodiment, the friction coefficient of the side of the friction plate 14 in contact with the underside of the base 4a of the guide rail 4 is larger than the friction coefficient of the side of the rail holder 5 in contact with the underside of the base 4a of the guide rail 4. Therefore, the guide rail fixing device 100 can have a further increased frictional force against the guide rail 4.

[0029] Furthermore, in the guide rail fixing devices 100 according to this embodiment, the rail clamp 10 for clamping, in cooperation with the friction plate 14, of the base 4a of the guide rail 4, which is placed in the lowest portion, is of the same type as the rail clamp 10 for clamping, in cooperation with the rail holder 5, of the base 4a of the guide rail 4. This can prevent the number of parts types of the guide rail fixing device 100 from increasing, thereby preventing an increase in manufacturing costs and installation costs.

[0030] Furthermore, in the guide rail fastening devices 100 according to this embodiment, the rail holders 5 are in contact with the respective bottom surfaces of the bases 4a of the plurality of guide rails 4. Further, the rail clamps 10 clamp the respective bases 4a of the plurality of guide rails 4 in cooperation with the rail holders 5. Furthermore, a friction plate 14 is additionally provided for one of the guide rails 4 other than the guide rail 4 located in the lowest portion, wherein the friction plate 14 is in contact with the bottom surface of the base 4a of the guide rail 4 and is in contact with the upper end of the rail holder 5, which is in contact with the bottom surface of the base 4a of the guide rail 4, to clamp the base 4a of the guide rail 4 in cooperation with the rail clamps 10.In this configuration of the guide rail fastening devices 100, the total magnitude of a friction force against the guide rails 4 can be adjusted by changing the number of friction plates 14 to be installed.

[0031] It should be noted that the friction plate 14 according to this embodiment can be installed with the existing guide rails 4. Therefore, in a case where the friction force between the guide rail 4 and the guide rail fixing device 100 has decreased, for example, due to the passage of time, the friction force can be increased by providing the required number of friction plates 14, thereby eliminating the need to replace parts of the guide rail fixing device 100. Description of the symbols 1 shaft 1a interior wall 2 pull-out cabins 3 Counterweight 4 guide rail 4a Base 4b Sliding part 5 rail holders 6 Base plate 7 carriers 7a Flange 8 tab 9 wall-mounted holder 10 rail clamps 11 bolt or screw 12 Mother 13 Spring washer 14 Friction plate 100 guide rail fastening device

Claims

[1] Guide rail fastening device (100) comprising: a rail holder (5) for contacting a bottom surface of a base (4a) of a guide rail (4) placed in a lowest portion of a plurality of guide rails (4) to be arranged conformally in an elevator shaft; a first rail clamp for clamping the base (4a) of the guide rail (4) in cooperation with the rail holder (5); and a friction plate (14) for contacting the underside of the base (4a) of the guide rail (4) placed in the lowest section, wherein a lower end of the friction plate (14) is in contact with an upper end of the rail holder (5), wherein the friction plate (14), in cooperation with a second rail clamp (10), clamps the base (4a) of the guide rail (4) placed in the lowest section. [2] The guide rail fixing device (100) according to claim 1, wherein a friction coefficient of a side of the friction plate (14) in contact with the underside of the base (4a) of the guide rail (4) is larger than that of a side of the rail holder (5) in contact with the underside of the base of the guide rail. [3] The guide rail fastening device (100) according to claim 1 or 2, wherein the second rail clamp (10) for clamping, in cooperation with the friction plate (14), the base (4a) of the guide rail (4) placed in the lowest portion is of the same type as the first rail clamp (10) for clamping, in cooperation with the rail holder (5), the base (4a) of the guide rail (4). [4] Guide rail fastening device (100) according to one of claims 1 to 3, wherein the rail holder (5) has a plurality of rail holders (5), each of which serves to contact a bottom side of a base (4a) of a corresponding guide rail (4) of the plurality of guide rails (4); the first rail clamp (10) comprises a plurality of first rail clamps (10), each of which, in cooperation with a corresponding rail holder (5) of the plurality of rail holders (5), clamps the base (4a) of the corresponding guide rail (4) of the plurality of guide rails (4); and at least one friction plate (14) is additionally provided for a guide rail (4) which is different from the guide rail (4) placed in the lowest section, wherein the at least one friction plate (14) is in contact with a bottom side of a base (4a) of the guide rail (4) and is in contact with an upper end of a rail holder (5) which is in contact with the bottom side of the base (4a) of the guide rail (4), wherein at least one friction plate (14), in cooperation with the other second rail clamp (5), clamps the base (4a) of the guide rail (4).

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