Elevator

Abstract

To achieve the improved maintenance / inspection workability of a hoist and the overturning prevention of the hoist without complicating the structure around the leg of the hoist body.SOLUTION: An elevator comprises a first machine stand on which a hoist is installed, two first supporting stands to support two locations in the longitudinal direction of the first machine stand respectively via a first elastic body, and an overturning prevention mechanism to prevent the hoist overturning. Each leg part of the hoist body is rigidly connected to the first machine stand. The overturning prevention mechanism comprises: a second machine stand which is rigidly connected to at least one end in the longitudinal direction of the first machine stand, and extending in a different direction from the first machine stand in the horizontal plane; and a second supporting stand supporting the end part in the extending direction of the second machine stand via a second elastic body and fixed to a second guide rail.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an elevator.

Background Art

[0002] A machine roomless elevator with a hoisting machine installed at the top inside a hoistway is known. In a machine roomless elevator, a machine table is arranged between a pair of guide rails, and a hoisting machine is installed on the machine table. Specifically, a machine table is bridged between two guide rails, both ends of the machine table are supported by the guide rails, and an elastic body is interposed between the legs of the hoisting machine main body and the machine table, thereby suppressing the transmission of the vibration of the hoisting machine to the guide rails.

[0003] On the other hand, a sheave is provided on the hoisting machine. A rope for raising and lowering a car or a counterweight in a hoistway is wound around the sheave. The sheave is arranged to protrude from one side of the hoisting machine so that, for example, the rope does not interfere with the machine table. Further, a downward load corresponding to the mass of the car or the counterweight is applied to the sheave. For this reason, the hoisting machine may fall due to the downward load applied to the sheave. Therefore, the elevator is provided with a mechanism for suppressing the fall of the hoisting machine (hereinafter referred to as "fall suppression mechanism").

[0004] Patent Document 1 describes a technique related to a hoisting machine installation device for an elevator in which a hoisting machine is installed on a machine table. Specifically, Patent Document 1 describes a configuration in which the front legs of the hoisting machine main body are attached to the machine table via a support elastic body, and the rear legs of the hoisting machine main body are attached to the machine table by a fall suppression mechanism. Further, Patent Document 1 describes a configuration in which a raising platform is arranged between the hoisting machine main body and the machine table, the raising platform is attached to the machine table via a support elastic body below the front legs of the hoisting machine main body, and the raising platform is attached to the machine table by a fall suppression mechanism below the rear legs of the hoisting machine main body.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Japanese Patent No. 6238262 (International Publication No. 2016 / 030943) Summary of the Invention Problems to be Solved by the Invention

[0006] In the technology described in Patent Document 1, in order to facilitate the maintenance and inspection work of the hoisting machine, the legs of the hoisting machine body and the vicinity of the legs are assembled with a support elastic body, a tilting suppression mechanism, etc. concentrated thereon. Therefore, the structure around the legs of the hoisting machine body becomes complicated.

[0007] An object of the present invention is to provide an elevator that can achieve both improvement in the maintainability inspection workability of the hoisting machine and suppression of the tilting of the hoisting machine without complicating the structure around the legs of the hoisting machine body. Means for Solving the Problems

[0008] In order to solve the above problems, for example, the configuration described in the claims is adopted. This application includes a plurality of means for solving the above problems. If one of them is mentioned, it is a hoisting machine in which a pair of legs are provided on the hoisting machine body, a first machine base on which the hoisting machine is installed, two positions in the longitudinal direction of the first machine base are supported via first elastic bodies respectively, and two first support bases fixed to a pair of first guide rails, and an elevator comprising a tilting suppression mechanism for suppressing the tilting of the hoisting machine. Each leg of the hoisting machine body is rigidly coupled to the first machine base. The tilting suppression mechanism is rigidly coupled to at least one end in the longitudinal direction of the first machine base and extends in a direction different from that of the first machine base in the horizontal plane, and an end in the extending direction of the second machine base is supported via a second elastic body and a second support base fixed to a second guide rail different from the pair of first guide rails. Advantages of the Invention

[0009] According to the present invention, it is possible to achieve both an improvement in the maintainability inspection workability of the hoist and suppression of the tipping of the hoist without complicating the structure around the legs of the hoist body. Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals, and duplicate descriptions are omitted as appropriate. Also, the following description and drawings are examples for explaining the present invention, and may be omitted and simplified for convenience of explanation. Each component may be in a single or plural number unless otherwise limited. Also, the positions, sizes, shapes, ranges, etc. of the components shown in the drawings may not represent the actual positions, sizes, shapes, ranges, etc. in order to facilitate understanding of the invention.

[0012] <Comparative form> First, a comparative form compared with the embodiment of the present invention will be described. FIG. 1 is a schematic perspective view showing a configuration example of an elevator according to a comparative form. An elevator 50 shown in FIG. 1 is a machine roomless elevator in which a hoisting machine 54 is installed at the top of a hoistway 51. The elevator 50 includes a car 52 that moves up and down in the hoistway 51, a counterweight 53 that moves up and down in the hoistway 51 in a direction opposite to the car 52, a hoisting machine 54 that generates a driving force for moving the car 52 and the counterweight 53 up and down, a pair of guide rails 55a and 55b that guide the up and down movement of the car 52, and a pair of guide rails 56a and 56b that guide the up and down movement of the counterweight 53.

[0013] The hoisting machine 54 includes a sheave 57. A rope (not shown) for moving the car 52 and the counterweight 53 up and down in the hoistway 51 is wound around the sheave 57. This rope is also wound around a pulley 67 disposed above the counterweight 53 and a pulley 59 attached to a pulley frame 58. The pulley 67 is a pulley for moving the counterweight 53 up and down in accordance with the movement of the rope accompanying the drive of the hoisting machine 54. The pulley 59 is a pulley for moving the car 52 up and down in accordance with the movement of the rope accompanying the drive of the hoisting machine 54.

[0014] The hoisting machine 54 is installed on the machine base 61. The hoisting machine 54 has a hoisting machine main body 60. A pair of left and right legs 60a, 60a are provided on the hoisting machine main body 60. The hoisting machine 54 is installed on the machine base 61 with each leg 60a of the hoisting machine main body 60 placed on the machine base 61 via an elastic body 62. The elastic body 62 functions as a vibration isolator that suppresses the transmission of vibrations associated with the drive of the hoisting machine 54 to the pair of guide rails 56a, 56b via the machine base 61 and the support base 63.

[0015] The machine base 61 is supported by a support base (not shown) fixed to the guide rail 56a and a support base 63 fixed to the guide rail 56b. A support beam 64 is fixed to one end of the machine base 61 in the longitudinal direction. Two suspension bolts 65 are provided on the pulley frame 58 described above. The upper end of the suspension bolt 65 protrudes above the support beam 64. Further, a nut 68 is engaged with the upper end of the suspension bolt 65 via an elastic body 66 for the pulley. Thus, the pulley frame 58 is supported in a state of being suspended from the support beam 64. The elastic body 66 for the pulley functions as a vibration isolator that suppresses the transmission of vibrations associated with the rotation of the pulley 59 to the guide rail 55a etc. via the support beam 64.

[0016] In the elevator 50 according to the above-described comparative form, when a downward load corresponding to the mass of the car 52, the counterweight 53, etc. is applied to the sheave 57 around which the rope is wound, the hoisting machine 54 will fall due to the deformation of the elastic body 62. For this reason, a tipping prevention mechanism for preventing the tipping of the hoisting machine 54 is required.

[0017] Figure 2 is a perspective view for explaining the configuration of the first tipping prevention mechanism according to the comparative form. As shown in FIG. 2, the first overturning prevention mechanism 70 is disposed above the hoist 54. The first overturning prevention mechanism 70 includes a support member 71 spanned across a pair of guide rails 56a and 56b, an upper bracket 72 attached to the upper part of the hoist body 60, and an elastic body 73 disposed between the support member 71 and the upper bracket 72. One end and the other end in the longitudinal direction of the support member 71 are fixed to the corresponding guide rails 56a and 56b, respectively. The elastic body 73 functions as a vibration isolation material that suppresses the transmission of vibrations associated with the driving of the hoist 54 to the pair of guide rails 56a and 56b via the upper bracket 72 and the support member 71. By disposing the first overturning prevention mechanism 70 above the hoist 54 in this way, the overturning of the hoist 54 can be suppressed.

[0018] FIG. 3 is a perspective view for explaining the configuration of a second overturning prevention mechanism according to a comparative form. As shown in FIG. 3, the second overturning prevention mechanism 80 is arranged in pairs on the left and right sides of the hoist 54. The second overturning prevention mechanism 80 includes side brackets 81a and 81b attached to both side surfaces of the hoist body 60, a support bracket 82a fixed to the guide rail 56a, a support bracket 82b fixed to the guide rail 56b, an elastic body 83a disposed between the side bracket 81a and the support bracket 82a, and an elastic body 83b disposed between the side bracket 81b and the support bracket 82b. The elastic body 83a functions as a vibration isolation material that suppresses the transmission of vibrations associated with the driving of the hoist 54 to the guide rail 56a via the side bracket 81a and the support bracket 82a. The elastic body 83b functions as a vibration isolation material that suppresses the transmission of vibrations associated with the driving of the hoist 54 to the guide rail 56b via the side bracket 81b and the support bracket 82b. By disposing the second overturning prevention mechanism 80 on the left and right sides of the hoist 54 in this way, the overturning of the hoist 54 can be suppressed.

[0019] However, if a configuration is adopted in which the first tipping prevention mechanism 70 is arranged above the hoisting machine 54, or a configuration in which the second tipping prevention mechanism 80 is arranged on the left and right sides of the hoisting machine 54, when an operator performs maintenance and inspection work on the hoisting machine 54, the presence of the first tipping prevention mechanism 70 and the second tipping prevention mechanism 80 will narrow the working space, making the maintenance and inspection work time-consuming.

[0020] <First Embodiment> FIG. 4 is a schematic perspective view showing a configuration example of an elevator according to the first embodiment. The elevator 1 shown in FIG. 4 is a machine roomless elevator in which a hoisting machine 5 is installed at the top of a hoistway 2. The elevator 1 includes a car 3 that moves up and down in the hoistway 2, a counterweight 4 that moves up and down in the hoistway 2 in the direction opposite to the car 3, a hoisting machine 5 that generates a driving force for moving the car 3 and the counterweight 4 up and down, a pair of guide rails 6a, 6b that guide the up and down movement of the car 3, and a pair of guide rails 7a, 7b that guide the up and down movement of the counterweight 4. The guide rails 6a, 6b and the guide rails 7a, 7b are each formed in a T shape in plan view. Plan view means the case of viewing the object from directly above.

[0021] The hoisting machine 5 includes a sheave 8. A rope (not shown) for moving the car 2 and the counterweight 3 up and down in the hoistway 2 is wound around the sheave 8. This rope is wound around a pulley 9 arranged above the counterweight 3. The pulley 9 is a pulley for moving the counterweight 4 up and down in accordance with the movement of the rope accompanying the drive of the hoisting machine 5.

[0022] The hoisting machine 5 is installed on a machine base 12a. The hoisting machine 5 has a hoisting machine main body 11. A pair of left and right legs 11a are provided on the hoisting machine main body 11. The hoisting machine 5 is installed on the machine base 12a with each leg 11a of the hoisting machine main body 11 placed on the machine base 12a. Further, the elevator 1 includes a tipping prevention mechanism 13 for suppressing the tipping of the hoisting machine 5. Hereinafter, the installation structure of the hoisting machine 5 including the tipping prevention mechanism 13 will be described in detail.

[0023] FIG. 5 is a perspective view for explaining the configuration of the fall prevention mechanism according to the first embodiment. In FIG. 5, in the horizontal plane, the longitudinal direction of the machine base 12a is defined as the X direction, and the direction orthogonal to the longitudinal direction of the machine base 12a is defined as the Y direction. As shown in FIG. 5, the hoist 5 is mainly supported by using two machine bases 12a, 12b, three elastic bodies 14a, 14b, 14c, and three support bases 15a, 15b, 15c. Among these, the main components of the fall prevention mechanism 13 are the machine base 12b, the elastic body 14c, and the support base 15c.

[0024] The machine base 12a is supported at two positions in the longitudinal direction X of the machine base 12a by using two elastic bodies 14a, 14b and two support bases 15a, 15b. The elastic body 14a and the support base 15a are arranged closer to one side (the left side in FIG. 5) in the longitudinal direction X of the machine base 12a, and the elastic body 14b and the support base 15b are arranged at the end of the other side (the right side in FIG. 5) in the longitudinal direction X of the machine base 12.

[0025] Both the machine base 12a and the machine base 12b are formed in a square tube shape. The machine base 12a and the machine base 12b are made of a metal material such as steel, and each of the support bases 15a, 15b, 15c is also made of a metal material such as steel. Each leg portion 11a of the hoist main body 11 is rigidly coupled to the machine base 12a. In this specification, "rigidly coupled" means that the members are integrally and firmly coupled without interposing an elastic body or the like between the members to be coupled.

[0026] A machine base 12b is rigidly coupled to one end portion of the machine base 12a in the longitudinal direction X. The machine base 12b extends in a direction different from that of the machine base 12a in the horizontal plane. Specifically, the machine base 12a extends in the X direction from the coupling portion with the machine base 12b, while the machine base 12b extends in the Y direction from the coupling portion with the machine base 12a. Also, the angle formed by the machine base 12a and the machine base 12b in the horizontal plane is 90°. Thereby, the machine base 12a and the machine base 12b are arranged in an L shape in plan view. The machine base 12a corresponds to the first machine base, and the machine base 12b corresponds to the second machine base.

[0027] The elastic body 14a is disposed between the machine base 12a and the support base 15a. The elastic body 14b is disposed between the machine base 12a and the support base 15b. The elastic body 14c is disposed between the machine base 12b and the support base 15c. The elastic bodies 14a and 14b correspond to the first elastic body, and the elastic body 14c corresponds to the second elastic body.

[0028] The elastic bodies 14a, 14b, and 14c can be constituted by, for example, a rubber member or a spring member. In the present embodiment, as an example, it is assumed that the elastic bodies 14a, 14b, and 14c are all constituted by rubber members. The basic configurations and mounting structures of the respective elastic bodies 14a, 14b, and 14c are the same.

[0029] The elastic body 14a functions as a vibration isolator (anti-vibration rubber in this exemplary form) between the machine base 12a and the support base 15a. Also, the elastic body 14b functions as a vibration isolator between the machine base 12a and the support base 15b. Therefore, even when each leg portion 11a of the hoist main body 11 is rigidly coupled to the machine base 12a, transmission of vibrations associated with the driving of the hoist 5 to the guide rails 7a and 7b can be suppressed. Further, the elastic body 14c functions as a vibration isolator between the machine base 12b and the support base 15c. Therefore, even when the machine base 12b is rigidly coupled to one end portion in the longitudinal direction of the machine base 12a, transmission of vibrations associated with the driving of the hoist 5 to the guide rail 6a via the machine bases 12a and 12b can be suppressed.

[0030] The support base 15a supports the machine base 12a via an elastic body 14a below the machine base 12a. The support base 15a is fixed to the guide rail 7a. The support base 15b supports the machine base 12a via an elastic body 14b below the machine base 12a. The support base 15b is fixed to the guide rail 7b. The support base 15c supports the machine base 12b via an elastic body 14c below the machine base 12b. The support base 15c is fixed to the guide rail 6a. Both the support base 15a and the support base 15b correspond to the first support base. Both the guide rail 7a and the guide rail 7b correspond to the first guide rail, and the guide rail 6a corresponds to the second guide rail. In FIG. 5, the shapes of the respective support bases 15a, 15b, and 15c are shown in a simplified manner and do not represent the actual shapes. The shapes of the respective support bases 15a, 15b, and 15c are basically the same. The specific shapes (structures) of the respective support bases 15a, 15b, and 15c will be described later.

[0031] FIG. 6 is a diagram for explaining the coupling structure between the leg portion 11a of the hoisting machine main body 11 and the machine base 12a, and the coupling structure between the machine base 12a, the elastic body 14a, and the support base 15a in the first embodiment. In FIG. 6, for the sake of convenience, the coupling structure between the leg portion 11a of the hoisting machine main body 11 and the machine base 12a, and the coupling structure between the machine base 12a, the elastic body 14a, and the support base 15a are collectively represented in one cross-section. However, the cross-section of the upper part above the height position H shown in FIG. 6 and the cross-section of the lower part below the height position H show cross-sections at different positions in the longitudinal direction of the machine base 12.

[0032] (Coupling structure between the leg portion of the hoisting machine main body and the machine base) As shown in Fig. 6, the leg portion 11a of the hoist main body 11 and the machine base 12a are rigidly coupled using a plurality of hoist fixing bolts 16 and a plurality of hoist fixing nuts 17. Specifically, the male screw portion of the hoist fixing bolt 16 projects into the interior of the machine base 12a through a through hole provided in the leg portion 11a of the hoist main body 11 and a through hole provided in the upper wall portion of the machine base 12a, and the hoist fixing nut 17 is engaged with this projecting portion. Then, the leg portion 11a of the hoist main body 11 is fastened and fixed to the upper wall portion of the machine base 12a by tightening each hoist fixing nut 17 corresponding to the plurality of hoist fixing bolts 16. With such a coupling structure, the leg portion 11a of the hoist main body 11 is integrally and rigidly coupled to the machine base 12a. Note that the number of hoist fixing bolts 16 and hoist fixing nuts 17 used to rigidly couple one leg portion 11a to the machine base 12a is determined according to the size and mass of the hoist 5, etc.

[0033] (Coupling Structure of Machine Base, Elastic Body, and Support Base) A support base 15a is attached to the lower wall portion of the machine base 12a via an elastic body 14a. The elastic body 14a is formed in a rectangular parallelepiped shape. A metal plate 18a is joined to the upper surface of the elastic body 14a, and a metal plate 18b is joined to the lower surface of the elastic body 14a. The elastic body 14a and the metal plates 18a, 18b can be configured as, for example, an integrally molded product. A plurality of screw shafts 19a are joined to the metal plate 18a by welding or the like, and a plurality of screw shafts 19b are also joined to the metal plate 18b by welding or the like.

[0034] The screw shaft 19a is arranged in a state of protruding upward from the upper surface of the metal plate 18a. Further, the screw shaft 19a protrudes into the interior of the machine base 12a through a through hole provided in the lower wall portion of the machine base 12a, and a nut 20a is engaged with this protruding portion. Then, the metal plate 18a is fastened and fixed to the machine base 12a by tightening each nut 20a corresponding to the plurality of screw shafts 19a. Thereby, the elastic body 14a is coupled to the machine base 12a. The number of the screw shafts 19a and the nuts 20a is determined according to the size of the elastic body 14a and the like. This also applies to the number of the screw shafts 19b and the nuts 20b described later.

[0035] The screw shaft 19b is arranged in a state of protruding downward from the lower surface of the metal plate 18b. Further, the screw shaft 19b protrudes below the first plate portion 151 of the support base 15a through a through hole provided in the first plate portion 151 of the support base 15a, and a nut 20b is engaged with this protruding portion. Then, the metal plate 18b is fastened and fixed to the support base 15a by tightening each nut 20b corresponding to the plurality of screw shafts 19b. Thereby, the elastic body 14 is coupled to the support base 15a.

[0036] Note that the coupling structure among the machine base 12a, the elastic body 14b, and the support base 15b, and the coupling structure among the machine base 12c, the elastic body 14c, and the support base 15c are basically the same as the coupling structure among the machine base 12a, the elastic body 14a, and the support base 15a described above. However, the coupling structure among the machine base 12a, the elastic body 14a, and the support base 15a is not limited to the structure shown in FIG. 6, and various modifications are possible.

[0037] FIG. 7 is a diagram for explaining the coupling structure between the support base 15b and the guide rail 7b in the first embodiment. As shown in FIG. 7, the support base 15b integrally has a first plate portion 151, a second plate portion 152, and a third plate portion 153. The first plate portion 151 and the second plate portion 152 are formed to form a right angle. Also, the first plate portion 151 is horizontally arranged, and the second plate portion 152 is vertically arranged. The first plate portion 151 is placed on the upper end portion of the guide rail 7b. The second plate portion 152 is arranged along the length direction (vertical direction in FIG. 7) of the guide rail 7b. The third plate portion 153 is arranged in a state of protruding downward from the lower surface of the first plate portion 151.

[0038] The guide rail 7b integrally has a base portion 700 and a guide portion 701. The base portion 700 is fixed to the wall portion of the lifting path 2 using a rail bracket or the like. The guide portion 701 protrudes from the central portion in the width direction (depth direction in FIG. 7) of the base portion 700, and guides the movement of an object (the balance weight 4 in this exemplary form) at this protruding portion. Here, the configuration of the guide rail 7b has been described as an example, but the configurations of the other guide rails 6a, 6b, 7a are basically the same as the configuration of the guide rail 7b.

[0039] The second plate portion 152 is fastened and fixed to the base portion 700 of the guide rail 7b using a plurality of bolts 22 and a plurality of nuts 23. The third plate portion 153 is fastened and fixed to the guide portion 701 of the guide rail 7b using a bolt 24 and a nut (not shown) that meshes with the bolt 24. The bolt 24 is arranged in a direction perpendicular to the bolt 22. With such a coupling structure, the support base 15b and the guide rail 7b are coupled. Also, the support base 15b is fixed to the upper end portion of the guide rail 7b.

[0040] Note that the shapes (structures) of the support bases 15a and 15c are basically the same as the shape (structure) of the support base 15b. Also, the coupling structures between the support base 15a and the guide rail 7a and between the support base 15c and the guide rail 6a are basically the same as the coupling structure between the support base 15b and the guide rail 7b described above. However, the coupling structure between the support base 15b and the guide rail 7b is not limited to the structure shown in FIG. 7, and various modifications are possible.

[0041] FIG. 8 is a diagram for explaining the coupling structure between the first machine base (machine base 12a) and the second machine base (machine base 12b) in the first embodiment. FIG. 8 shows an example of a structure for rigidly coupling the machine base 12b to one end in the longitudinal direction of the machine base 12a. As shown in FIG. 8, a plate-like member 25 made of metal is fixed to one end in the longitudinal direction (the left-right direction in FIG. 8) of the machine base 12a by welding or the like. Thereby, the machine base 12a and the plate-like member 25 are integrated. The plate-like member 25 is disposed at one end in the longitudinal direction of the machine base 12a so as to close the opening of the machine base 12a. In the longitudinal direction of the machine base 12a, the plate-like member 25 is sandwiched between the machine base 12a and the machine base 12b. Then, the plate-like member 25 and the machine base 12b are fastened and fixed using a plurality of bolts 26 and a plurality of nuts 27. Specifically, the male screw portion of the bolt 26 projects into the machine base 12b through a through hole provided in the plate-like member 25 and a through hole provided in the side wall portion of the machine base 12b, and the nut 27 is engaged with this protruding portion. And the plate-like member 25 attached to the machine base 12a is fastened and fixed to the side wall portion of the machine base 12b by tightening each nut 27 corresponding to the plurality of bolts 26.

[0042] In addition, a pair of upper and lower connecting plates 28a and 28b are disposed at the coupling portion between the machine base 12a and the machine base 12b. Each of the connecting plates 28a and 28b is constituted by, for example, a metal plate having high rigidity. The connecting plate 28a is a plate for connecting the upper wall portions of the machine bases 12a and 12b on the upper surface side of the machine bases 12a and 12b. The connecting plate 28b is a plate for connecting the lower wall portions of the machine bases 12a and 12b on the lower surface side of the machine bases 12a and 12b.

[0043] The connecting plate 28a is arranged in contact with the upper surface of the machine base 12a and the upper surface of the machine base 12b. The connecting plate 28a and the upper wall portion of the machine base 12a are fastened and fixed using a plurality of bolts 29a and a plurality of nuts 30a. Specifically, the male screw portion of the bolt 29a protrudes into the machine base 12a through the through hole provided in the connecting plate 28a and the through hole provided in the upper wall portion of the machine base 12a, and the nut 30a is engaged with this protruding portion. Then, the connecting plate 28a is fastened and fixed to the upper wall portion of the machine base 12a by tightening each nut 30a corresponding to the plurality of bolts 29a.

[0044] Also, the connecting plate 28a and the upper wall portion of the machine base 12b are fastened and fixed using a plurality of bolts 29b and a plurality of nuts 30b. Specifically, the male screw portion of the bolt 29b protrudes into the machine base 12b through the through hole provided in the connecting plate 28a and the through hole provided in the upper wall portion of the machine base 12b, and the nut 30b is engaged with this protruding portion. Then, the connecting plate 28a is fastened and fixed to the upper wall portion of the machine base 12b by tightening each nut 30b corresponding to the plurality of bolts 29b. Thereby, the upper wall portion of the machine base 12a and the upper wall portion of the machine base 12b are connected using the plurality of bolts 29a, 29b, the plurality of nuts 30a, 30b, and the connecting plate 28a.

[0045] On the other hand, the connecting plate 28b is arranged in contact with the lower surface of the machine base 12a and the lower surface of the machine base 12a. The connecting plate 28b and the lower wall portion of the machine base 12a are fastened and fixed using a plurality of bolts 31a and a plurality of nuts 32a. Specifically, the male screw portion of the bolt 31a protrudes into the machine base 12a through the through hole provided in the connecting plate 28b and the through hole provided in the lower wall portion of the machine base 12a, and the nut 32aa is engaged with this protruding portion. Then, the connecting plate 28b is fastened and fixed to the lower wall portion of the machine base 12a by tightening each nut 32a corresponding to the plurality of bolts 31a.

[0046] In addition, the connecting plate 28b and the lower wall portion of the machine base 12b are fastened using a plurality of bolts 31b and a plurality of nuts 32b. Specifically, the male screw portion of the bolt 31b protrudes into the machine base 12b through a through-hole provided in the connecting plate 28b and a through-hole provided in the lower wall portion of the machine base 12b, and the nut 32b is engaged with this protruding portion. Then, the connecting plate 28b is fastened and fixed to the lower wall portion of the machine base 12b by tightening each nut 32b corresponding to the plurality of bolts 31b. As a result, the lower wall portion of the machine base 12a and the lower wall portion of the machine base 12b are connected using a plurality of bolts 31a, 31b, a plurality of nuts 32a, 32b, and the connecting plate 28b.

[0047] Note that the number of bolts and nuts used to rigidly couple the machine base 12b to one end portion in the longitudinal direction of the machine base 12a can be appropriately changed. Further, the structure for rigidly coupling the machine base 12b to one end portion in the longitudinal direction of the machine base 12a is not limited to the structure shown in FIG. 8, and various modifications are possible.

[0048] In the elevator 1 according to the first embodiment, each leg portion 11a of the hoisting machine body 11 is rigidly coupled to the machine base 12a on which the hoisting machine 5 is installed. Specifically, each leg portion 11a of the hoisting machine body 11 is firmly coupled to the upper wall portion of the machine base 12a using a plurality of hoisting machine fixing bolts 16 and a plurality of hoisting machine fixing nuts 17. As a result, compared with a configuration in which a support elastic body, a tilting suppression mechanism, or the like is assembled near the leg portion of the hoisting machine body as in the hoisting machine installation device of the elevator described in Patent Document 1, or a configuration in which an elastic body 62 is disposed between the leg portion 60a of the hoisting machine body 60 and the machine base 61 as in the elevator 50 according to the comparative form, the structure around the leg portion 11a of the hoisting machine body 11 becomes simple.

[0049] Also, in the elevator 1 according to the first embodiment, when a downward load corresponding to the mass of the car 3, the counterweight 4, etc. is applied to the sheave 8 around which the rope is wound, the hoisting machine 5 tends to fall due to the deformation of the elastic bodies 14a and 14b. However, in the tipping prevention mechanism 13 according to the first embodiment, the machine base 12b is rigidly coupled to one end in the longitudinal direction of the machine base 12a. Further, the machine base 12b extends in a direction different from that of the machine base 12a within the horizontal plane, and the end of the machine base 12b in the extending direction is supported by the support base 15c via the elastic body 14c. For this reason, the elastic body 14c exerts an elastic restoring force that resists the downward load applied via the machine base 12b. Also, since the support base 15c is fixed to the guide rail 6a, it receives and supports the downward load applied via the machine base 12b. Therefore, the tipping of the hoisting machine 5 is suppressed by the machine base 12b, the elastic body 14c, and the support base 15c. As a result, the first tipping prevention mechanism 70 and the second tipping prevention mechanism 80, which were required in the elevator 50 according to the above comparative form, become unnecessary. For this reason, when an operator performs maintenance and inspection work on the hoisting machine 5, the upper part and the left and right spaces of the hoisting machine 5 can be opened, and a wide space for maintenance and inspection work can be secured around the hoisting machine 5. As a result, according to the elevator 1 according to the first embodiment, it is possible to achieve both an improvement in the maintainability of the hoisting machine 5 and suppression of the tipping of the hoisting machine 5 without complicating the structure around the leg portion 11a of the hoisting machine body 11.

[0050] Also, in the elevator 1 according to the first embodiment, the two support bases 15a and 15b are fixed to the upper end portions of the corresponding guide rails 7a and 7b, respectively. For this reason, when an operator performs maintenance and inspection work on the hoisting machine 5, the left and right spaces of the hoisting machine 5 are opened wider. Therefore, the maintainability of the hoisting machine 5 can be further improved.

[0051] Also, as shown in FIG. 5, the end portion of the machine base 12b in the extending direction is supported by the elastic body 14c and the support base 15c at a position away from the machine base 12a in the Y direction. Therefore, when the force for the hoist 5 to fall is received by the elastic body 14c and the support base 15c via the machine base 12b, the downward load applied to the elastic body 14c and the support base 15c can be reduced according to the length of the machine base 12b. In that case, the length L of the machine base 12b is preferably 500 mm or more, more preferably 700 mm or more. The length L of the machine base 12b is defined as the dimension from one end of the machine base 12b coupled to the machine base 12a to the other end of the machine base 12b supported by the elastic body 14c and the support base 15c.

[0052] Also, in the elevator according to the first embodiment, the machine base 12a as the first machine base and the machine base 12b as the second machine base are arranged in an L shape in plan view. Thereby, it becomes easier to rigidly couple the machine base 12a and the machine base 12b, and the number of main components (12b, 14c, 15c) of the fall prevention mechanism 13 can be suppressed to be small.

[0053] FIG. 9 is a perspective view for explaining a modified example of the fall prevention mechanism 13 according to the first embodiment. As shown in FIG. 9, one end portion in the longitudinal direction of the machine base 12a is directly above the elastic body 14a and the support base 15a and is rigidly coupled to one end portion of the machine base 12b. And the angle formed by the machine base 12a and the machine base 12b in the horizontal plane is an angle larger than 90°, that is, an obtuse angle. Although not shown, the angle formed by the machine base 12a and the machine base 12b in the horizontal plane may be an acute angle. For achieving the intended object of the present invention, the angle formed by the machine base 12a and the machine base 12b in the horizontal plane is preferably 75° or more and 135° or less. <Second Embodiment> FIG. 10 is a perspective view for explaining the configuration of the fall prevention mechanism 13A according to the second embodiment. The fall prevention mechanism 13A according to the second embodiment is characterized in that the machine base 12b serves as the support beam 64 in the comparative form (see FIG. 1). A pulley 34 is attached to the pulley frame 33. A rope (not shown) is wound around the pulley 34 via the sheave 8 of the hoist 5. The pulley 34 is a pulley for raising and lowering the car 3 in accordance with the movement of the rope accompanying the drive of the hoist 5. The pulley frame 33 is supported in a state of being suspended from the machine base 12b. Two suspension bolts 35 are provided on the pulley frame 33.

[0054] FIG. 11 is a diagram for explaining the coupling structure of the machine base 12b, the pulley frame 33, and the suspension bolt 35 in the fall prevention mechanism 13A according to the second embodiment. As shown in FIG. 11, a bolt insertion hole 121a is provided in the upper wall portion of the machine base 12b, and a bolt insertion hole 121b is provided in the lower wall portion of the machine base 12b. The suspension bolt 35 is fixed to the pulley frame 33 by, for example, welding or the like. The structure for fixing the suspension bolt 35 to the pulley frame 33 is not limited to a specific structure. The suspension bolt 35 protrudes upward in a state of standing vertically from the upper surface of the pulley frame 33. Then, the suspension bolt 35 passes through the bolt insertion holes 121a and 121b of the machine base 12b and protrudes above the upper wall portion of the machine base 12b, and two nuts 36a and 36b are engaged with this protruding portion.

[0055] The two nuts 36a and 36b constitute a double nut structure portion 36. The double nut structure portion 36 generates a locking force by the two nuts 36a and 36b, and suppresses the displacement of the double nut structure portion 36 in the axial direction of the suspension bolt 35 by this locking force. Further, the lower nut 36b is a nut integrally formed with the washer 37, that is, a nut with a washer. However, the washer 37 may be a separate structure from the nut 36b. The washer 37 is in contact with the upper surface of the machine base 12b. Thereby, the pulley frame 33 is supported in a state of being suspended from the machine base 12b by using the suspension bolt 35 and the nuts 36a and 36b engaged therewith.

[0056] In the elevator according to the second embodiment, as shown in FIGS. 10 and 11, a pulley frame 33 to which a pulley 34 is attached is supported in a state of being suspended from a machine base 12b using a suspension bolt 35 or the like. Therefore, the pulley frame 33 and the pulley 34 can be arranged in the hoistway by using the machine base 12b for suppressing the tipping of the hoisting machine 5.

[0057] Also, as shown in FIG. 10, the machine base 12b is supported by a support base 15c via an elastic body 14c. Further, the machine base 12a is supported by a support base 15a via an elastic body 14a and is also supported by a support base 15b via an elastic body 14b. Therefore, even when vibrations associated with the rotation of the pulley 34 are transmitted to the machine base 12b or are transmitted to the machine base 12a through the machine base 12b, the vibrations transmitted to each of the machine bases 12a and 12b can be absorbed by the three elastic bodies 14a, 14b, and 14c. Thus, it is possible to suppress vibrations of the guide rails 6a, 7a, and 7b associated with the rotation of the pulley 34 without using the pulley elastic body 66 (see FIG. 1) that was required in the comparative form.

[0058] <Third Embodiment> FIG. 12 is a perspective view for explaining the configuration of the tipping suppression mechanism 13B according to the third embodiment. The tipping suppression mechanism 13B according to the third embodiment is different from the tipping suppression mechanism 13 (see FIG. 5) according to the first embodiment described above in that a machine base 12c, an elastic body 14d, and a support base 15d are added.

[0059] One end of the machine table 12a in the longitudinal direction X is rigidly coupled to one end of the machine table 12b, and one end of the machine table 12c is rigidly coupled to the other end of the machine table 12a in the longitudinal direction X. The machine table 12c corresponds to the second machine table. The machine table 12c extends in a direction different from that of the machine table 12a in the horizontal plane. Specifically, the machine table 12c extends in the Y direction from the joint portion with the machine table 12a so as to be parallel to the machine table 12b in the horizontal plane. And the end portion in the extending direction of the machine table 12c is supported by the support base 15d via the elastic body 14d. Also, the angle formed by the machine table 12a and the machine table 12c in the horizontal plane is 90°. Thus, the machine table 12a, the machine table 12b, and the machine table 12c are arranged in a substantially U-shape in plan view.

[0060] The elastic body 14d is disposed between the machine table 12c and the support base 15d. The elastic body 14d corresponds to the second elastic body. The elastic body 14d functions as a vibration isolator (such as vibration isolator rubber) between the machine table 12c and the support base 15d. Therefore, it is possible to suppress the vibration accompanying the driving of the hoist 5 from being transmitted to the guide rail 6b via the machine tables 12a and 12c.

[0061] The support base 15d is below the machine table 12c and supports the machine table 12c via the elastic body 14d. The support base 15d is fixed to the guide rail 6b. Specifically, the support base 15d is fixed to the upper end portion of the guide rail 6b in a state of being placed on the upper end portion of the guide rail 6b. The support base 15d corresponds to the second support base.

[0062] In the elevator according to the third embodiment, a machine base 12a as a first machine base and machine bases 12b and 12c as second machine bases are provided, and these three machine bases 12a, 12b, and 12c are arranged in a U shape in plan view. For this reason, among the forces that cause the hoisting machine 5 to fall due to the downward load applied to the sheave 8, some of the forces can be received by the elastic body 14c and the support base 15c via the machine base 12b, and the other forces can be received by the elastic body 14d and the support base 15d via the machine base 12c. Thereby, compared with the case where the force that causes the hoisting machine 5 to fall is received only by the elastic body 14c and the support base 15c via the machine base 12b (the case of the first embodiment shown in FIG. 5), the mechanical strength required for the machine bases 12b and 12c and the elastic restoring force required for the elastic bodies 14c and 14d can be reduced. For this reason, it is possible to reduce the size of the machine bases 12b and 12c and the size of the elastic bodies 14c and 14d.

[0063] <Modifications and the like> Note that the present invention is not limited to the above-described embodiments and includes various modifications. For example, in the above-described embodiments, the present invention has been described in detail for easy understanding of the content of the present invention, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiments. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. In addition, the configuration of another embodiment can be added to the configuration of one embodiment. Also, a part of the configuration of each embodiment can be deleted, another configuration can be added, or it can be replaced with another configuration.

[0064] For example, in the third embodiment, similar to the second embodiment, a configuration may be adopted in which the machine base 12b serves as the support beam 64 in the comparative form.

Explanation of reference numerals

[0065] 1... elevator, 5... hoisting machine, 6a, 6b... guide rail (second guide rail), 7a, 7b... guide rail (first guide rail), 11... hoisting machine body, 11a... leg, 12a... machine base (first machine base), 12b, 12c... machine base (second machine base), 14a, 14b... elastic body (first elastic body), 14c, 14d... elastic body (second elastic body), 15a, 15b... support base (first support base), 15c, 15d... support base (second support base), 33... pulley frame, 34... pulley

Claims

1. A hoisting machine with a pair of legs provided on the hoisting machine body, a first machine base on which the hoisting machine is installed, two first support bases that support two positions in the longitudinal direction of the first machine base via first elastic bodies respectively and are fixed to a pair of first guide rails, a tilting suppression mechanism for suppressing the tilting of the hoisting machine, and comprising each of the legs of the hoisting machine body is rigidly coupled to the first machine base, the tilting suppression mechanism is rigidly coupled to at least one end in the longitudinal direction of the first machine base and extends in a direction different from that of the first machine base in the horizontal plane, a second machine base, supports an end in the extending direction of the second machine base via a second elastic body, and a second support base fixed to a second guide rail different from the pair of first guide rails, an elevator comprising.

2. The second machine base is rigidly coupled to one end in the longitudinal direction of the first machine base, the first machine base and the second machine base are arranged in an L shape in plan view The elevator according to Claim 1.

3. The second machine bases are respectively rigidly coupled to both ends in the longitudinal direction of the first machine base, the first machine base and the second machine base are arranged in a U shape in plan view The elevator according to Claim 1.

4. The two first support bases are fixed to the upper ends of the corresponding first guide rails respectively The elevator according to Claim 1.

5. The angle formed by the first machine base and the second machine base in the horizontal plane is 75° or more and 135° or less The elevator according to Claim 1.

6. The length of the second machine base is 500 mm or more The elevator according to Claim 1.

7. Comprising a pulley frame to which a pulley for raising and lowering a car according to the movement of a rope accompanying the driving of the hoisting machine is attached, the pulley frame is supported in a state of being suspended from the second machine base The elevator according to Claim 1.

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