Patent Publication Number: US-2022227602-A1

Title: Elevator passenger car and elevator having same car

Description:
TECHNICAL FIELD 
     The present invention relates to an elevator passenger car, and an elevator provided with the car. 
     BACKGROUND ART 
     The art disclosed in PTL 1 has been proposed as the conventional elevator passenger car structure. PTL 1 discloses the car frame constituted by a pair of vertical frames disposed parallel to a pair of guide rails, a lower beam which is provided with a pulley, and connected to lower sections of the pair of vertical frames while making the longitudinal direction horizontally oriented, and an upper beam which is connected to upper sections of the pair of vertical frames while making the longitudinal direction horizontally oriented. The pair of under-car frames fabricated by L-shaped steel is disposed on the upper surface of the lower beam in the direction orthogonal to the longitudinal direction of the lower beam. The pair of under-car frames is connected to a pair of support frames which is disposed in the direction orthogonal to the longitudinal direction of the pair of under-car frames. The pair of under-car frames serves to support a car room. 
     CITATION LIST 
     Patent Literature 
     PTL 1: Japanese Patent Application Laid-Open No. 2012-6695 
     SUMMARY OF INVENTION 
     Technical Problem 
     The elevator passenger car as disclosed in PTL 1 had a disadvantage of insufficient rigidity of the pair of under-car frames for supporting the car room. It was therefore required to connect the pair of under-car frames to the pair of support frames disposed in the direction orthogonal to the longitudinal direction of the pair of under-car frames, resulting in the complicated configuration. 
     An object of the present invention is to provide an elevator passenger car, which allows enhancement of rigidity of the lower beam with the simple configuration while suppressing an increase in the number of components, and an elevator provided with the passenger car. 
     Solution to Problem 
     For attaining the object, the present invention provides an elevator passenger car including an upper beam disposed at an upper side, a pair of vertical frames having upper ends connected to both ends of the upper beam in a longitudinal direction, a lower beam disposed between lower ends of the pair of vertical frames while having both ends connected, and a pair of underfloor side surface beams which is mounted and connected onto the both ends of the lower beam while extending in a direction orthogonal to the lower beam. The elevator passenger car has a car room disposed at a part defined by the upper beam, the pair of vertical frames, and the lower beam. The car room is mounted on the pair of underfloor side surface beams. An underfloor side surface beam reinforcing member is further provided for each of the pair of underfloor side surface beams so as to be reinforced. 
     The present invention provides an elevator including a hoisting machine, a main rope wound around the hoisting machine, a passenger car provided at one side of the main rope, and a balance weight provided at the other side of the main rope. The passenger car includes a car frame and a car room formed inside the car frame. The car frame includes an upper beam disposed at an upper side, a pair of vertical frames having upper ends connected to both ends of the upper beam in a longitudinal direction, and a lower beam disposed between lower ends of the pair of vertical frames while having both ends connected to the lower ends of the vertical frames. A pair of underfloor side surface beams is mounted and connected to both ends of the lower beam while extending in a direction orthogonal to the lower beam. The car room is mounted on the pair of underfloor side surface beams. An underfloor side surface beam reinforcing member is provided for each of the pair of underfloor side surface beams so as to be reinforced. 
     Advantageous Effects of Invention 
     The present invention provides the elevator passenger car which allows enhancement of rigidity of the lower beam with the simple configuration while suppressing an increase in the number of components, and the elevator provided with the passenger car. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  schematically illustrates a structure of an elevator system according to an embodiment of the present invention. 
         FIG. 2  is an enlarged side view of a passenger car  3  as illustrated in  FIG. 1 . 
         FIG. 3  is a perspective view only of a car frame as illustrated in  FIG. 2 . 
         FIG. 4  is an overall perspective view of an underfloor side surface beam according to an embodiment of the present invention. 
         FIG. 5  is a sectional view taken along line V-V of  FIG. 4 . 
         FIG. 6  is a partially enlarged view of an area as a dotted frame  40  of  FIG. 2 . 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     An embodiment of the present invention will be described referring to the drawings. The same components will be designated with the same reference signs so that the redundant explanations are omitted. 
     Each of the respective components of the present invention does not have to be independent of each other. The structures as described as follows are allowed. For example, the single component may be constituted by multiple members. Each of the multiple components may be constituted by the single member. A specific component constitutes a part of another component. A part of a specific component may serve as a part of the other component. 
       FIG. 1  schematically illustrates a structure of an elevator system according to an embodiment of the present invention. Referring to  FIG. 1 , the elevator system is disposed in an unshown hoistway. One end of a main rope  2  wound around a hoisting machine  1  is suspended through under-car pulleys  4 A,  4 B disposed below a passenger car  3 , and fixed to an upper position of the hoistway. The other end of the main rope  2  is suspended through a pulley  6  above a balance weight  5 , and fixed to an upper position of the hoistway. The elevator system is configured to vertically move the passenger car  3  disposed at one side of the main rope, and the balance weight disposed at the other side of the main rope in the hoistway by rotatably driving the hoisting machine  1 . 
       FIG. 2  is an enlarged side view of the passenger car  3  as illustrated in  FIG. 1 . In the embodiment, directions of front-rear, up-down, and left-right are defined on the basis of a sight of a user of the elevator with respect to the passenger car  3  as illustrated in  FIG. 2 . Referring to  FIG. 2 , the passenger car  3  includes a car frame  7  and a car room  8  that is formed inside the car frame  7 . 
     The car frame  7  includes an upper beam  9  disposed above the car room  8 , a lower beam  10  disposed below the car room  8 , and a pair of vertical frames  11 A,  11 B for connecting the respective ends of the upper beam  9  and the lower beam  10 . The vertical frame  11 A is not shown in the drawing as it is located at a back side of the car room  8 . The car frame  7  is disposed closer to the front side from the center of the front-rear direction of the car room  8 . The under-car pulleys  4 A,  4 B are positioned at the center of the car room  8  in the front-rear direction. 
       FIG. 3  is a perspective view only of the car frame as illustrated in  FIG. 2 . Referring to  FIG. 3 , the car frame  7  is formed by connecting upper ends of the pair of vertical frames  11 A,  11 B to both longitudinal (left-right direction) ends of the upper beam  9  disposed at the upper side using bolts  31 , and connecting lower ends of the pair of vertical frames  11 A,  11 B to both longitudinal (left-right direction) ends of the lower beam  10  disposed at the lower side using bolts  32 . 
     The lower beam  10  formed to have a U-like shape with an upper open section includes a mount part  10 A having one upper end bent outward (front side), and a mount part  10 B having the other upper end bent inward (front side). The car frame  7  is disposed along an unshown guide rail. An emergency stop device  12  disposed below the lower beam  10  applies braking force to the passenger car  3  via the guide rails when the speed of the passenger car  3  exceeds the predetermined fall speed so that the passenger car  3  is stopped. A guide device bracket  13  is disposed below the emergency stop device  12  for securing stability upon vertical movement of the passenger car  3  along the guide rail. 
     A pair of underfloor side surface beams  14 A,  14 B is mounted on the mount parts  10 A,  10 B as upper parts of the lower beam  10 , which will be described in detail later, and are fixed with bolts  33  ( FIG. 2 ). A floor of the car room  8  is mounted on the underfloor side surface beams  14 A,  14 B at the part indicated by a dotted frame  40  of  FIG. 2  via antivibration devices  15 . The underfloor side surface beams  14 A,  14 B are horizontally disposed inside the space defined by the opposing vertical frames  11 A,  11 B while extending in the front-rear direction orthogonally to the left-right direction (longitudinal direction) of the lower beam  10 . 
     Pulley brackets  16 A,  16 B are fixed to the lower surfaces of the underfloor side surface beams  14 A,  14 B with bolts  34 , respectively. The under-car pulleys  4 A,  4 B are rotatably journaled to the pulley brackets  16 A,  16 B. A rope guide  17  is fixed with bolts  35  below the pulley brackets  16 A,  16 B so as to be connected to each other. The rope guide  17  is configured to prevent foreign matters from being caught in the main rope  2  wound around the under-car pulleys  4 A,  4 B. 
     The structure of the underfloor side surface beam will be described referring to  FIGS. 4 and 5 .  FIG. 4  is an overall perspective view of the underfloor side surface beam according to the embodiment of the present invention.  FIG. 5  is a sectional view taken along line V-V of  FIG. 4 . The underfloor side surface beam  14 A has a U-shaped section cut in the direction orthogonal to the longitudinal direction, which is reinforced while having an upwardly directed open section. 
     An underfloor side surface beam reinforcing member  18  has a U-shaped section cut in the direction orthogonal to the longitudinal direction reinforced while having a downwardly directed open section disposed opposingly to the upwardly directed open section of the underfloor side surface beam  14 A. The underfloor side surface beam reinforcing member  18  is formed to have a width of the section cut orthogonally to the longitudinal direction larger than a width of the underfloor side surface beam  14 A. The underfloor side surface beam reinforcing member  18  and the underfloor side surface beam  14 A are arranged to have the respective open sections opposite to each other so that the underfloor side surface beam  14 A is inserted to be fitted with the inside of the underfloor side surface beam reinforcing member  18 . Each of the inner side surfaces of the underfloor side surface beam reinforcing member  18  and each of the outer side surfaces of the underfloor side surface beam  14 A are opposingly joined and fixed with bolts  36 . 
     The underfloor side surface beam reinforcing member  18  is formed to have its longitudinal direction length shorter than that of the underfloor side surface beam  14 A, and located in the center of the underfloor side surface beam  14 A. Because of difference in the longitudinal direction length between the underfloor side surface beam  14 A and the underfloor side surface beam reinforcing member  18 , both ends each having no opposing section of the underfloor side surface beam reinforcing member  18  disposed above serve as areas on which the floor of the car room  8  is mounted via the antivibration devices  15  to be described in detail later. 
     The underfloor side surface beam  14 A is reinforced by the underfloor side surface beam reinforcing member  18  in the form of a simple fitting structure without largely changing the outer appearance configuration. The underfloor side surface beam is mounted on the lower beam  10  at the section reinforced by the underfloor side surface beam reinforcing member  18 . Accordingly, it is possible to impart sufficient strength to both the underfloor side surface beams  14 A,  14 B using the relatively simple configuration with small number of components. 
     Although not shown in the drawing, the other underfloor side surface beam  14 B is similarly configured to the underfloor side surface beam  14 A as described above. 
     Connection of the lower beam  10  to the underfloor side surface beams  14 A,  14 B will be further described referring to  FIGS. 2 and 3 . As  FIGS. 2 and 3  illustrate, each of the underfloor side surface beams  14 A,  14 B is longitudinally longer than the underfloor side surface beam reinforcing member  18 , and fixed onto the lower beam  10  each at the section reinforced by the underfloor side surface beam reinforcing member  18 . 
     Since each of the underfloor side surface beams  14 A,  14 B is longitudinally longer than the underfloor side surface beam reinforcing member  18 , antivibration device mount sections  19 A,  19 B are formed on both longitudinal direction ends each having no opposing section of the underfloor side surface beam reinforcing member  18  disposed above. Corresponding to the dotted frame  40  shown in  FIG. 2 , the antivibration devices  15  are disposed on the antivibration device mount sections  19 A,  19 B, on which the floor of the car room  8  is mounted via the antivibration devices  15 . The antivibration device  15  is made of an elastic body such as a coil spring, rubber, and the like. 
       FIG. 6  is a partially enlarged view of the dotted frame of  FIG. 2 . A reinforcing plate  20  serving as a panel is disposed on the bottom of the underfloor side surface beam  14 B at the antivibration device mount section  19 B. Another reinforcing plate  22  corresponding to the reinforcing plate  20  is disposed below the lower surface of a floor  21  of the car room  8 . The multiple antivibration devices  15  intervene between the opposing reinforcing plates  20  and  22 . A stopper bolt  23  is inserted through a hole  26  formed in the bottom of the underfloor side surface beam  14 B and the reinforcing plate  20 . A leading end of the stopper bolt  23 , which is screwed with a nut  24 , is inserted into a hole  29  of the floor  21  while having the nut  24  around the leading end in contact with the lower surface of the reinforcing plate  22  for preventing the slipping-off. 
     An adjusting jack bolt  25  is inserted into the other hole  27  formed in the bottom of the underfloor side surface beam  14 B and the reinforcing plate  20 . A gap G (opening) is formed between a leading end of the adjusting jack bolt  25  and the reinforcing plate  22  for adjusting a flexure amount of the antivibration device  15 . The adjusting jack bolt  25  holds the space between the reinforcing plates  20  and  22  when the elevator is in operation so that the floor  21  of the car room  8  is supported with the antivibration devices  15 . The vibration of the passenger car  3  thus can be absorbed by the antivibration device  15 . When replacing the antivibration device  15 , the adjusting jack bolt  25  is rotated to reduce the gap G so that the leading end of the adjusting jack bolt  25  is brought into abutment on the reinforcing plate  22 . The adjusting jack bolt  25  is further rotated to bring the reinforcing plate  22  and the antivibration device  15  into the non-contact state. In this state, the passenger car  3  is lifted by the adjusting jack bolt  25  so that the old antivibration device  15  which has been used in the state is replaced with a new antivibration device  15 . Thereafter, the adjusting jack bolt  25  is rotated in reverse until the predetermined gap G between the leading end of the adjusting jack bolt  25  and the reinforcing plate  22  is restored to bring the reinforcing plate  22  into contact with the antivibration device  15 . 
     Although not described herein, the underfloor side surface beam  14 A is also similarly configured. 
     As described above, the embodiment includes the upper beam  9  disposed at an upper side, the pair of vertical frames  11 A,  11 B having upper ends connected to both ends of the upper beam  9  in a longitudinal direction, the lower beam  10  disposed between lower ends of the pair of vertical frames  11 A,  11 B while having both ends connected thereto, and the pair of underfloor side surface beams  14 A,  14 B which is mounted and connected onto the both ends of the lower beam  10  while extending in a direction orthogonal to the lower beam  10 . The car room  8  is disposed at a part defined by the upper beam  9 , the pair of vertical frames  11 A,  11 B, and the lower beam  10 . The car room  8  is mounted on the pair of underfloor side surface beams  14 A,  14 B. The underfloor side surface beam reinforcing member  18  is provided for each of the pair of underfloor side surface beams  14 A,  14 B so as to be reinforced. The underfloor side surface beam reinforcing member  18  is located in at least each center of the underfloor side surface beams  14 A,  14 B. 
     The structure allows the underfloor side surface beams  14 A,  14 B to be reinforced by the underfloor side surface beam reinforcing member  18  without largely changing the configuration. The section rigidity of an area around the center to which the stress is applied intensively can be sufficiently enhanced with the simple configuration with small number of components. 
     In the embodiment, in addition to the above-described structure, the pair of underfloor side surface beams  14 A,  14 B has the U-shaped section cut in the direction orthogonal to the longitudinal direction, having an upwardly directed open section. The underfloor side surface beam reinforcing member  18  has the U-shaped section cut in the direction orthogonal to the longitudinal direction, having the downwardly directed open section to be opposite to each of the open sections of the pair of underfloor side surface beams  14 A,  14 B. 
     In the structure, the underfloor side surface beams  14 A,  14 B of U-shaped section, and the underfloor side surface beam reinforcing member  18  of U-shaped section are arranged to have the respective open sections are opposite to each other. This makes it possible to further enhance each section rigidity of the underfloor side surface beams  14 A,  14 B. 
     In the embodiment, in addition to the above-described structure, each longitudinal direction length of the pair of underfloor side surface beams  14 A,  14 B is longer than the longitudinal direction length of the underfloor side surface beam reinforcing member  18 . The antivibration devices are disposed on both ends of each of the pair of underfloor side surface beams  14 A,  14 B, each end having no opposing section of the underfloor side surface beam reinforcing member  18  disposed above for accommodating the car room  8  via the antivibration devices  15 . 
     The structure allows provision of the antivibration devices  15  to provide the passenger car  3  with less vibrations by enhancing each section rigidity of the underfloor side surface beams  14 A,  14 B. 
     In the embodiment, in addition to the above-described structure, the reinforcing plate  22  is disposed below the lower surface of the car room  8 . The adjusting jack bolt  25  is inserted into the hole  27  formed in each bottom at both ends of the pair of underfloor side surface beams  14 A,  14 B. 
     The structure allows easy adjustment of the flexure amount of the antivibration device  15  by regulating the gap between the adjusting jack bolt  25  and the reinforcing plate  22 . Furthermore, regulation of the gap between the adjusting jack bolt  25  and the reinforcing plate  22  allows easy detachment or attachment of the antivibration device  15 . 
     The present invention is not limited to the embodiment as described above, and includes various modifications. For example, the embodiment is described in detail for readily understanding of the present invention which is not necessarily limited to the one equipped with all structures as described above. It is possible to replace a part of the structure of one embodiment with the structure of another embodiment. The one embodiment may be provided with an additional structure of another embodiment. It is further possible to add, remove, and replace the other structure to, from and with a part of the structure of the respective embodiments. 
     REFERENCE SIGNS LIST 
     
         
         
           
               7  . . . car frame, 
               8  . . . car room, 
               9  . . . upper beam, 
               10  . . . lower beam, 
               10 A,  10 B . . . mount part, 
               11 A,  11 B . . . vertical frame, 
               14 A,  14 B . . . underfloor side surface beam, 
               15  . . . antivibration device, 
               16 A,  16 B . . . pulley bracket, 
               17  . . . rope guide, 
               18  . . . underfloor side surface beam reinforcing member, 
               19 A,  19 B . . . antivibration device mount section, 
               20 ,  22  . . . reinforcing plate, 
               21  . . . floor, 
               25  . . . adjusting jack bolt