Patent Publication Number: US-9409748-B2

Title: Elevator safety device and elevator safety device mounting method

Description:
TECHNICAL FIELD 
     The present invention relates to an elevator safety device that is mounted onto a car to apply a braking force to the car, and to an elevator safety device mounting method for mounting the safety device onto the car. 
     BACKGROUND ART 
     Conventionally, in order to make safety devices mountable to cars even if the mounting methods differ, elevator safety devices have been proposed in which the safety devices are mounted onto lower beams of cars by means of mounting adapters (Patent Literature 1 and 2). 
     CITATION LIST 
     Patent Literature 
     [Patent Literature 1] 
     Japanese Patent Laid-Open No. 2008-162767 (Gazette) 
     [Patent Literature 2] 
     Japanese Patent Laid-Open No. 2009-220898 (Gazette) 
     SUMMARY OF THE INVENTION 
     Problem to be Solved by the Invention 
     In hydraulic direct-coupled plunger-type elevators (elevators in which a car is coupled directly to a hydraulic plunger, and the car moves vertically by vertical movement of the plunger), for example, sometimes safety devices are not mounted to the car. Consequently, when hydraulic direct-coupled plunger-type elevators are remodeled into suspension elevators in which a car is suspended by ropes or belts, for example, it is necessary to mount safety devices onto the car. 
     However, when mounting the safety devices that are shown in Patent Literature 1 and 2 onto a hydraulic direct-coupled plunger-type elevator car, because bolt apertures, etc., for mounting the mounting adapter are not disposed on the lower beam of the car, the lower beam, etc., of the car must be transported to a factory to perform machining such as drilling, etc., making the work of mounting the safety devices onto the car very time-consuming. Because of that, the duration of the remodeling work is lengthened, prolonging down time during which the elevator cannot be used. 
     Because the safety devices that are shown in Patent Literature 1 and 2 are mounted onto the lower beam of the car by means of mounting adapters, the safety devices protrude downward from the car significantly, and if there are not sufficient room in the pit of the hoistway, the safety devices cannot be mounted onto the car. 
     The present invention aims to solve the above problems and an object of the present invention is to provide an elevator safety device that can be prevented from protruding significantly vertically from a car, and that can be easily mounted onto the car, and to provide an elevator safety device mounting method. 
     Means for Solving the Problem 
     In order to achieve the above object, according to one aspect of the present invention, there is provided an elevator safety device that is mounted onto a car that includes a cage and a car frame that surrounds the cage, the car being moved along a guide rail and the elevator safety device applying a braking force to the car, wherein the elevator safety device includes: a safety supporting body that includes: a supporting body main body that is disposed inside a vertical stanchion groove that is disposed vertically on a vertical stanchion of the car frame; and an engaging portion that protrudes outward from the supporting body main body, and that is hooked onto an upper end portion of the vertical stanchion; a supporting body fixing apparatus that includes: a first fixing bolt that applies pressure between a side surface of the vertical stanchion groove and the supporting body main body; and a second fixing bolt that applies pressure between the engaging portion and a guiding apparatus mounting base that is fixed to the car frame above the safety supporting body, the supporting body fixing apparatus being disposed on the safety supporting body so as to fix the safety supporting body to the vertical stanchion; a safety device main body that includes a braking member that is displaceable relative to the safety supporting body, and that is disposed on the safety supporting body so as to apply a braking force to the car by placing the braking member in contact with the guide rail; a safety mounting apparatus that is mounted onto the car frame; and an actuating apparatus that is supported by the safety mounting apparatus, and that displaces the braking member to activate the safety device main body. 
     Effects of the Invention 
     The elevator safety device according to the present invention can be prevented from protruding significantly vertically from a car, and can be easily mounted onto the car. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front elevation that shows an elevator car according to Embodiment 1 of the present invention; 
         FIG. 2  is a plan that shows the elevator car in  FIG. 1 ; 
         FIG. 3  is a front elevation that shows an upper portion of a car frame from  FIG. 1 ; 
         FIG. 4  is a side elevation that shows the car frame in  FIG. 3 ; 
         FIG. 5  is a cross section that is taken along Line V-V in  FIG. 4 ; 
         FIG. 6  is a cross section that is taken along Line VI-VI in  FIG. 4 ; 
         FIG. 7  is an exploded perspective that shows the upper portion of the car frame from  FIG. 3 ; 
         FIG. 8  is a perspective of a safety frame and a vertical stanchion from  FIG. 7  when viewed from a different angle; 
         FIG. 9  is a side elevation that shows an upper portion of a car frame according to Embodiment 2 of the present invention; 
         FIG. 10  is a cross section that is taken along Line X-X in  FIG. 9 ; 
         FIG. 11  is an exploded perspective that shows the upper portion of the car frame from  FIG. 9 ; and 
         FIG. 12  is an exploded perspective that shows a safety device main body from  FIG. 11 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Preferred embodiments of the present invention will now be explained with reference to the drawings. 
     Embodiment 1 
       FIG. 1  is a front elevation that shows an elevator car according to Embodiment 1 of the present invention.  FIG. 2  is a plan that shows the elevator car in  FIG. 1 . In the figures, a pair of guide rails  1  that face each other in a horizontal direction are installed vertically inside a hoistway. A car  2  is disposed between the pair of guide rails  1 . The car  2  is suspended inside the hoistway by a plurality of suspending bodies  3 . Ropes or belts, for example, are used as the suspending bodies  3 . The suspending bodies  3  are wound around a driving sheave of a hoisting machine (not shown) that is a driving apparatus that is disposed inside the hoistway. The car  2  is guided by the guide rails  1  while being moved vertically inside the hoistway by the rotation of the driving sheave of the hoisting machine. 
     The car  2  has: a cage  4 ; and a car frame  5  that supports the cage  4 , and that surrounds the cage  4 . The cage  4  has: a car floor  6 ; and a cage main body  7  that is mounted onto the car floor  6 . The car frame  5  has: a lower frame  8  that is disposed horizontally, on which the cage  4  is mounted; an upper frame  9  that is disposed horizontally above the cage  4 ; a pair of vertical stanchions  10  that connect respective end portions of the lower frame  8  and the upper frame  9  to each other, and that respectively face the guide rails  1 . Gussets  11  that reinforces the car frame  5  are fixed to joined portions between each of the vertical stanchions  10  and the upper frame  9 . Each of the suspending bodies  3  is connected to the upper frame  9 . 
     A plurality of guiding apparatuses  12  that guide the car  2  vertically along the guide rails  1  are respectively fixed removably to upper surfaces of two end portions of the upper frame  9  and lower surfaces of two end portions of the lower frame  8  by means of flat guiding apparatus mounting bases  13 . Oilers  14  that supply lubricating oil to the guide rails  1  are respectively disposed on each of the guiding apparatuses  12  that are fixed to the upper frame  9 . 
     Mounted onto an upper portion of the car frame  5  are: a pair of safety devices  15  that apply a braking force to the car  2  by gripping the pair of guide rails  1  individually; and a coupling apparatus  16  that operates each of the safety devices  15  together by coupling the pair of safety devices  15  to each other. 
     A speed governor is disposed in an upper portion of the hoistway, and a tensioning sheave is disposed in a lower portion of the hoistway (neither shown). The speed governor has a speed governor sheave (not shown). A speed governor rope  17  is wound around the speed governor sheave and the tensioning sheave. A first end portion and a second end portion of the speed governor rope  17  are connected to each other by means of a rope connecting apparatus  18 . 
     Connected to the rope connecting apparatus  18  are: a safety linking apparatus  19  that is coupled to the safety devices  15 ; and a car linking apparatus  20  that is coupled to the car frame  5 . Thus, when the car  2  moves vertically, the speed governor rope  17  is moved together with the car  2 , and the speed governor sheave is moved in response to the movement of the car  2 . 
     The overspeed switch that is activated when rotational speed of the speed governor sheave reaches a preset set overspeed is disposed on the speed governor. When the overspeed switch is activated, power supply to the hoisting machine that moves the car  2  is stopped, activating the hoisting machine braking apparatus. The speed governor grips the speed governor rope  17  if the rotational speed of the speed governor sheave  15  reaches a safety overspeed that is higher than the set overspeed. Because movement of the speed governor rope  17  is stopped when the speed governor rope  17  is gripped by the speed governor, but movement of the car  2  continues, the car  2  is displaced relative to the speed governor rope  17 . The safety linking apparatus  19  is operated by the displacement of the car  2  relative to the speed governor rope  17 , activating each of the safety devices  15 . 
       FIG. 3  is a front elevation that shows an upper portion of the car frame  5  from  FIG. 1 .  FIG. 4  is a side elevation that shows the car frame  5  in  FIG. 3 . In addition,  FIG. 5  is a cross section that is taken along Line V-V in  FIG. 4 , and  FIG. 6  is a cross section that is taken along Line VI-VI in  FIG. 4 .  FIG. 7  is an exploded perspective that shows the upper portion of the car frame  5  from  FIG. 3 . In the figures, as shown particularly in  FIG. 7 , each of the vertical stanchions  10  is a prism that has a box-shaped cross section that has: a back plate portion  10   a  that faces a guide rail  1 ; and a pair of side plate portions  10   b  that protrude toward the guide rail  1  from two side portions of the back plate portion  10   a . Consequently, a vertical stanchion groove  21  that is open toward the guide rail  1  is formed vertically on each of the vertical stanchions  10  by the back plate portion  10   a  and each of the side plate portions  10   b.    
     The upper frame  9  has a pair of upper beams  22  that are on opposite sides of the vertical stanchion  10  in a width direction of the vertical stanchion  10  (the direction in which the pair of side plate portions  10   b  face each other). Each of the upper beams  22  is fixed to the vertical stanchion  10  by nuts and bolts so as to have a gusset  11  interposed. Each of the upper beams  22  is a beam that has a box-shaped cross section that has: a vertical plate portion  22   a ; and an upper plate portion  22   b  and a lower plate portion  22   c  that protrude outward horizontally from an upper edge portion and a lower edge portion, respectively, of the vertical plate portion  22   a  so as to face each other vertically. The pair of upper beams  22  are disposed such that the vertical plate portions  22   a  face each other in the width direction of the vertical stanchion  10  and the upper plate portions  22   b  and the lower plate portions  22   c  face outward. 
     The guiding apparatus mounting bases  13  are disposed on top of each of the upper beams  22  so as to span between the pair of upper beams  22 . The guiding apparatus mounting bases  13  are thereby disposed above the vertical stanchions  10  so as to be separated from the vertical stanchions  10 . The guiding apparatus mounting bases  13  are fixed to each of the upper plate portions  22   b  by fastening together a plurality of bolts  23  that are passed sequentially through a plurality of penetrating apertures that are disposed on the guiding apparatus mounting bases  13  and the upper plate portions  22   b , and a plurality of nuts  24  that are screwed onto each of the bolts  23 . The guiding apparatus mounting bases  13  are thereby fixed removably onto the upper frame  9 . The guiding apparatuses  12  are fixed to the guiding apparatus mounting bases  13 , and the oilers  14  are fixed to the guiding apparatuses  12 . Moreover, as shown in  FIGS. 3 through 5 , the guiding apparatuses  12  are fixed to the guiding apparatus mounting bases  13  by bolts  25 . 
     As shown particularly in  FIG. 7 , the safety devices  15  have: safety frames (safety supporting bodies)  31  that are supported by upper end portions of the vertical stanchions  10 ; frame fixing apparatuses (supporting body fixing apparatuses)  32  that are disposed on the safety frames  31 , and that fix the safety frames  31  to the vertical stanchions  10 ; safety device main bodies  33  that are mounted onto the safety frames  31  so as to be able to grip the guide rails  1 ; safety mounting apparatuses  34  that are mounted onto the upper frame  9 ; and actuating apparatuses  35  that are supported by the safety mounting apparatuses  34 , and that activate the safety device main bodies  33 . 
     Now,  FIG. 8  is a perspective of the safety frame  31  and the vertical stanchion  10  from  FIG. 7  when viewed from a different angle. The safety frame  31  has: a frame main body (a supporting body main body)  41  that is disposed inside the vertical stanchion groove  21 ; a pair of horizontal plates (engaging portions)  42  that protrude horizontally from an upper end portion of the frame main body  41  so as to hook onto the upper end portion of the vertical stanchions  10 ; and an inclined plate (a supporting guiding portion)  43  that protrudes from a portion of the upper end portion of the frame main body  41  between the pair of horizontal plates  42  so as to be inclined downward. In this example, the horizontal plates  42  and the inclined plate  43  are formed by bending a portion of the plate that extends from the upper end portion of the frame main body  41 . 
     The frame main body  41  has: a rear plate portion  41   a  that is disposed so as to be parallel to the back plate portion  10   a  of the vertical stanchions  10 ; and a pair of facing plate portions  41   b  that protrude outward toward the open portion of the vertical stanchion groove  21  from two side portions of the rear plate portion  41   a  so as to face each other in a width direction of the frame main body  41 , and a box-shaped cross section is formed by the rear plate portion  41   a  and the respective facing plate portions  41   b . A width dimension of the frame main body  41  is smaller than a width dimension inside the vertical stanchion groove  21 . The horizontal plates  42  and the inclined plate  43  protrude from the upper end portion of the rear plate portion  41   a  in an opposite direction to the facing plate portions  41   b.    
     The frame fixing apparatus  32  has: a plurality of horizontal bolts (first fixing bolts)  51  that are screwed into a plurality of screw-threaded apertures that pass through each of the facing plate portions  41   b ; a plurality of jack bolts (second fixing bolts)  52  that are screwed into a plurality of screw-threaded apertures that pass through the horizontal plates  42 ; and a plurality of restricting bolts  53  that are screwed into a plurality of screw-threaded apertures that pass through the horizontal plates  42  at positions that are closer to the rear plate portion  41   a  than each of the jack bolts  52 . 
     Each of the horizontal bolts  51  protrudes outward from an external surface of the facing plate portions  41   b  in the width direction of the frame main body  41 . The amount of protrusion of each of the horizontal bolts  51  from the facing plate portions  41   b  is adjustable by adjusting the amount of thread engagement of the horizontal bolts  51  in the facing plate portions  41   b . The horizontal bolts  51  are pressed against two side surfaces of the vertical stanchion groove  21  so as to apply pressure between the side surfaces of the vertical stanchion groove  21  and the facing plate portions  41   b . The safety frame  31  is fixed to the vertical stanchion  10  mainly in the width direction of the vertical stanchion  10  (left and right) by the horizontal bolts  51  applying pressure between the side surfaces of the vertical stanchion groove  21  and the facing plate portions  41   b . The position of the frame main body  41  in the width direction of the vertical stanchion  10  is adjusted by adjusting the amount of thread engagement of the left and right horizontal bolts  51  such that a center position of the frame main body  41  is aligned with a center position of the guide rail  1 . 
     The jack bolts  52  protrude upward from the horizontal plates  42 . The amount of protrusion of each of the jack bolts  52  from the horizontal plates  42  is adjustable by adjusting the amount of thread engagement of the jack bolts  52  relative to the horizontal plates  42 . Each of the jack bolts  52  is pressed against a lower surface of the guiding apparatus mounting bases  13  so as to apply pressure between the lower surface of the guiding apparatus mounting bases  13  and the horizontal plates  42  ( FIGS. 4 through 6 ). The safety frame  31  is fixed to the vertical stanchion  10  mainly in the vertical direction of the vertical stanchions  10  by the respective jack bolts  52  applying pressure between the lower surfaces of the guiding apparatus mounting bases  13  and the horizontal plates  42 . The locknuts  54  that fasten the jack bolts  52  to the horizontal plates  42  are screwed onto the jack bolts  52 . The amount of protrusion of the jack bolts  52  from the horizontal plates  42  is fixed by fastening of the locknuts  54 . 
     The restricting bolts  53  protrude downward from the horizontal plates  42 . The amount of protrusion of each of the restricting bolts  53  from the horizontal plates  42  is adjustable by adjusting the amount of thread engagement of the restricting bolts  53  relative to the horizontal plates  42 . Each of the restricting bolts  53  is configured so as to hold the back plate portion  10   a  at an upper end portion of the vertical stanchion  10  against the back surface of the rear plate portion  41   a  of the frame main body  41 . The safety frame  31  is fixed to the vertical stanchion  10  mainly in a thickness direction of the vertical stanchion  10  (a depth direction of the vertical stanchion groove  21 ) by the restricting bolts  53  holding the back plate portion  10   a  against the frame main body  41 . 
     A tapered portion that becomes narrower toward a tip end portion is formed on a screw-threaded portion of each of the restricting bolts  53 . Screw thread is not formed on the tapered portions. The frame main body  41  is placed in close contact with the back plate portion  10   a  of the vertical stanchion  10  by the action of the tapered portions by screwing the restricting bolts  53  into the horizontal plates  42  to increase the amount of downward protrusion. The back plate portion  10   a  at the upper end portion of the vertical stanchion  10  is thereby held firmly between the frame main body  41  and each of the restricting bolts  53 . 
     As shown particularly in  FIGS. 4 and 7 , the safety device main body  33  is disposed in a space between the pair of facing plate portions  41   b  (i.e., a space inside the frame main body  41 ). The safety device main body  33  has: a movable base (a movable body)  61  that can be moved vertically relative to the frame main body  41 ; a pair of wedges (a braking member)  62  that are disposed on the movable base  61  so as to be displaced vertically together with the movable base  61 ; a pair of guiding members  63  that are supported by the frame main body  41  so as to guide the wedges  62  in a direction of contact with and separation from the guide rail  1  by the vertical displacement of the wedges  62 ; and a plurality of compressed springs (elastic bodies)  64  ( FIG. 4 ) that are disposed between the guiding members  63  and the facing plate portions  41   b.    
     Each of the guiding members  63  is disposed so as to be separated from the guide rails  1  on two width direction sides of the guide rails  1 . An inclined surface that is inclined relative to the guide rail  1  so as to be further away from the guide rail  1  lower down is formed on each of the guiding members  63 . 
     The wedges  62  are mounted onto a shared movable base  61  so as to be displaceable horizontally. The wedges  62  are disposed on two sides of the guide rail  1  in the width direction of the vertical stanchion  10 , and are respectively disposed between the inclined surfaces of the guiding members  63  and the guide rail  1 . 
     The wedges  62  contact the guide rail  1  while being guided by the inclined surfaces of the guiding members  63  by being displaced upward relative to the frame main body  41  together with the movable base  61 , and push open gaps between the guide rail  1  and the guiding members  63  by being displaced further upward. Each of the compressed springs  64  is compressed by the gap between the guide rail  1  and the guiding members  63  being pushed open by the wedges  62 , generating an elastic force of recovery. The wedges  62  are pressed against the guide rail  1  from two sides by the elastic forces of recovery of the compressed springs  64  so as to grip the guide rail  1 . When the guide rail  1  is gripped by the wedges  62 , frictional force is generated between the wedges  62  and the guide rail  1 , applying a braking force to the car  2 . In other words, in this example, the safety device main bodies  33  are progressive safety device main bodies in which the magnitude of the braking force on the car  2  is maintained stably. 
     The safety mounting apparatuses  34  are mounted onto each of the upper beams  22  individually. The safety mounting apparatuses  34  have: a metal brace (a restraining member)  71  that is disposed above the lower plate portion  22   c ; a metal mounting device (a safety-supporting member)  72  that is disposed below the lower plate portion  22   c  so as to hold the lower plate portion  22   c  from opposite sides together with the metal brace  71 ; and a plurality of fastening bolts  73  that fasten the metal brace  71  and the metal mounting device  72 . The metal mounting device  72  has: a backing plate portion  72   a  that is disposed alongside the lower plate portion  22   c ; and, a flat bearing portion  72   b  that protrudes downward from the backing plate portion  72   a.    
     A plurality of penetrating apertures  74  through which the fastening bolts  73  are passed are disposed on the metal brace  71 . A plurality of screw-threaded apertures  75  into which the fastening bolts  73  are screwed are disposed on the backing plate portion  72   a  of the metal mounting device  72 . The metal brace  71  and the metal mounting device  72  are fastened by screwing the fastening bolts  73  that have been passed through the penetrating apertures  74  into the screw-threaded apertures  75  and fastening them. The safety mounting apparatuses  34  are mounted to the upper frame  9  by clamping the lower plate portions  22   c  of the upper beams  22  between the metal braces  71  and the metal mounting devices  72 . 
     The actuating apparatuses  35  have: a pivoting shaft  81  that is rotatably supported horizontally by the shaft-bearing portions  72   b ; a pivoting lever  82  that is disposed on the pivoting shaft  81  so as to be pivoted together with the pivoting shaft  81 ; and a chain (a cord-like body)  83  that is connected to the movable base  61  so as to suspend the wedges  62  and pull the movable base  61  and the wedges  62  up by being pulled by the pivoting lever  82 . Moreover, in this example, the cord-like body that suspends the wedges  62  is a chain  83 , but the cord-like body may also be a wire, a rope, or a belt, for example. 
     A penetrating slot  84  is disposed on an end portion of the pivoting lever  82 . An upper end portion of the movable base  61  is connected to a first end portion of the chain  83 , and a screw-threaded rod  85  that is passed through the penetrating slot  84  is connected to a second end portion of the chain  83 . A plurality of nuts  86  that prevent the screw-threaded rod  85  from dislodging from the penetrating slot  84  are screwed onto the screw-threaded rod  85 . The chain  83  extends from the first end portion, to which the movable base  61  is connected, over the inclined plate  43 , and then to the second end portion, to which the screw-threaded rod  85  is connected. The chain  83  is guided by the inclined plate  43  while being moved by the pivoting lever  82  being pivoted. The movable base  61  and the wedges  62  are displaced vertically by the movement of the chain  83 . 
     The rope connecting apparatus  18  has: a rod (a rod-shaped body)  91  that is fastened by a plurality of clips (fastening devices)  92  to the first end portion and the second end portion of the speed governor rope  17 ; an upper portion backing plate  93  and a lower portion backing plate  94  that are respectively disposed on the rod  91  so as to be separated from each other in a longitudinal direction of the rod  91 ; an intermediate member  95  that is disposed between the upper portion backing plate  93  and the lower portion backing plate  94  so as to be displaceable in the longitudinal direction of the rod  91 ; and connecting springs (elastic bodies)  96  that are respectively interposed between the intermediate member  95  and the upper portion backing plate  93  and between the intermediate member  95  and the lower portion backing plate  94 . The intermediate member  95  is configured so as to be subjected to elastic forces of recovery from the connecting springs  96  in directions of return to their original positions when displaced relative to the rod  91 . 
     The safety linking apparatus  19  has: a first link  101  that is coupled pivotably to the intermediate member  95  by means of a pin  104 ; and a second link  102  that is fixed to the pivoting shaft  81  so as to be coupled pivotably to the first link  101  by means of a pin  103 . The second link  102  is pivoted together with the pivoting shaft  81 . 
     If the car  2  is displaced downward relative to the rope connecting apparatus  18 , the safety linking apparatus  19  operates interdependently in response to the displacement of the car  2  relative to the rope connecting apparatus  18  such that the pivoting shaft  81  is pivoted in a direction in which the wedges  62  are pulled upward. 
     The car linking apparatus  20  has: a rope-coupling mounting apparatus  111  that is mounted onto the upper frame  9  by clamping the lower plate portion  22   c ; and a link  112  that is coupled between the intermediate member  95  and the rope-coupling mounting apparatus  111 . 
     The rope-coupling mounting apparatus  111  has: a metal brace (a restraining member)  113  that is disposed above the lower plate portion  22   c ; a metal mounting device (a coupling mounting member)  114  that is disposed below the lower plate portion  22   c  so as to hold the lower plate portion  22   c  from opposite sides together with the metal brace  113 ; and a plurality of fastening bolts  115  that fasten the metal brace  113  and the metal mounting device  114 . The metal mounting device  114  has: a backing plate portion  114   a  that is disposed alongside the lower plate portion  22   c ; and a vertical plate portion  114   b  that protrudes downward from the backing plate portion  114   a.    
     A plurality of penetrating apertures  116  through which the fastening bolts  115  are passed are disposed on the metal brace  113 . A plurality of screw-threaded apertures  117  into which the fastening bolts  115  are screwed are disposed on the backing plate portion  114   a  of the metal mounting device  114 . The metal brace  113  and the metal mounting device  114  are fastened by screwing the fastening bolts  115  that have been passed through the penetrating apertures  116  into the screw-threaded apertures  117  and fastening them. The rope-coupling mounting apparatus  111  is mounted to the upper frame  9  by clamping the lower plate portion  22   c  of an upper beam  22  between the metal brace  113  and the metal mounting device  114 . 
     A first end portion of the link  112  is coupled pivotably to the intermediate member  95  by means of the pin  104 , and a second end portion of the link  112  is coupled pivotably to the vertical plate portion  114   b  of the metal mounting device  114  by means of a pin  118 . 
     As shown in  FIG. 3 , the coupling apparatus  16  couples together the pivoting shafts  81  of each of the safety devices  15 . The coupling apparatus  16  has: a pair of (first and second) pivoting arms  121  that are fixed individually to each of the pivoting shafts  81 ; and a coupling member  122  that couples together each of the pivoting arms  121 . 
     A first end portion of the coupling member  122  is coupled pivotably to the first pivoting arm  121  by means of a pin, and a second end portion of the coupling member  122  is coupled pivotably to the second pivoting arm  121  by means of a pin. The pin that is disposed on the first end portion of the coupling member  122  and a pin that is disposed on the second end portion of the coupling member  122  are positioned at mutually opposite ends of a plane that contains the shaft axis of each of the pivoting shafts  81 . Thus, when the safety linking apparatus  19  is operated by the displacement of the car  2  relative to the rope connecting apparatus  18 , the respective pivoting shafts  81  are pivoted interdependently by the coupling apparatus  16  so as to be oriented in opposite directions to each other such that each of the safety devices  15  is operated in synchrony. 
     The coupling member  122  has: a cylindrical joint member  123  that has an inner surface that is a screw-threaded portion; and a pair of coupling rods  124  that are coupled to each of the pivoting arms  121  individually, and that are screwed into two end portions of the joint members  123 . A longitudinal dimension of the coupling member  122  is adjustable by adjusting the amount of thread engagement of each of the coupling rods  124  into the joint member  123 . 
     When a hydraulic direct-coupled plunger-type elevator in which safety devices are not mounted onto a car  2  is remodeled into a suspension elevator such as that described above, in which safety devices  15  are mounted onto the car  2 , a hydraulic jack that is directly coupled to the car  2  is removed, and a hoisting machine is installed at a predetermined position inside the hoistway, and the car  2  is suspended using suspending bodies  3  that are wound onto the driving sheave of the hoisting machine. A speed governor and a tensioning sheave are installed inside the hoistway, and a speed governor rope  17  is wound continuously around the speed governor sheave and the tensioning sheave, and then the first end portion and the second end portion of the speed governor rope  17  are connected using the rope connecting apparatus  18 . In addition, the safety devices  15  are mounted onto the car  2 , and then the safety devices  15  and the rope connecting apparatus  18  are coupled using the safety linking apparatus  19 , and the car frame  5  and the rope connecting apparatus  18  are coupled using the car linking apparatus  20 . 
     Next, a method for mounting the safety devices  15  onto the car  2  will be explained. First, safety units are produced in advance by mounting safety device main bodies  33  inside frame main bodies  41 . At this point, the horizontal bolts  51 , the jack bolts  52 , and the restricting bolts  53  are respectively predisposed on the safety frames  31  in a loosened state. The first end portions of the chains  83  are also connected to the upper end portions of the movable bases  61  (a unit preparing step). 
     Next, with the guiding apparatus mounting bases  13  removed from the car frame  5 , the frame main bodies  41  are inserted into the vertical stanchion grooves  21 , and the horizontal plates  42  are hung on the upper end portions of the vertical stanchions  10 . The safety units are thereby held on the upper portions of the vertical stanchions  10  such that the frame main bodies  41  and the safety device main bodies  33  are disposed inside the vertical stanchion grooves  21  (a unit mounting step). 
     Next, the back surfaces of the frame main bodies  41  are placed in close contact with the back plate portions  10   a  of the vertical stanchions  10  by the action of the tapered portions of the restricting bolts  53  by tightening the restricting bolts  53  with the back plate portions  10   a  held between the frame main bodies  41  and the restricting bolts  53  (a restricting bolt tightening step). 
     Next, each of the horizontal bolts  51  is turned (manipulated) to press the horizontal bolts  51  against the side surfaces of the vertical stanchion grooves  21  to apply pressure to each of the horizontal bolts  51  between the side surfaces of the vertical stanchion grooves  21  and the facing plate portions  41   b . Here, the positions of the safety frames  31  are adjusted in the width directions of the vertical stanchions  10  while adjusting the amount of thread engagement of the horizontal bolts  51  to align center positions of the frame main bodies  41  and the safety device main bodies  33  with the center positions of the guide rails  1  (a width direction fixing step). 
     Next, the backing plate portions  72   a  of the metal mounting devices  72  are placed in contact with the lower surfaces of the lower plate portions  22   c , and the backing plate portions  72   a  and the metal braces  71  are fastened using the plurality of fastening bolts  73  such that the metal braces  71  are placed in contact with the upper surfaces of the lower plate portions  22   c . The pivoting shafts  81  on which the pivoting levers  82 , the second links  102 , and the pivoting arms  121  are fixed at a predetermined angle are mounted onto the metal mounting devices  72  pivotably in advance. The safety mounting apparatuses  34  are thereby mounted onto the lower plate portions  22   c  such that the pivoting shafts  81  are supported pivotably on the safety mounting apparatuses  34  with the pivoting levers  82 , the second links  102 , and the pivoting arms  121  fixed thereto (a safety mounting apparatus mounting step). 
     Next, the screw-threaded rods  85  that are connected to the second end portions of the chains  83  are inserted into the penetrating slots  84  of the pivoting levers  82 , and the plurality of nuts  86  are screwed onto the screw-threaded rods  85  so as to prevent the screw-threaded rods  85  from dislodging from the pivoting levers  82 . The chains  83  are thereby connected to the pivoting levers  82  (a chain coupling step). 
     Next, the guiding apparatus mounting bases  13  are disposed above the safety frames  31  that are mounted onto the upper end portions of the vertical stanchions  10 , and the guiding apparatus mounting bases  13  are fixed to the upper surfaces of each of the upper beams  22  by the plurality of bolts  23 . The guiding apparatuses  12  and the oilers  14  are mounted onto the guiding apparatus mounting bases  13  in advance (a mounting base fixing step). 
     Next, each of the jack bolts  52  is turned (manipulated) to press the jack bolts  52  against the lower surfaces of the guiding apparatus mounting bases  13  to apply pressure to each of the jack bolts  52  between the guiding apparatus mounting bases  13  and the horizontal plates  42 . At this point, the respective locknuts  54  are tightened onto the horizontal plates  42  so as to prevent each of the jack bolts  52  from loosening (a vertical fixing step). The safety devices  15  are thereby mounted onto the car  2 . 
     Next, as described above, a speed governor and a tensioning sheave are installed inside the hoistway, and a first end portion and a second end portion of a speed governor rope that is wound continuously around the speed governor sheave and the tensioning sheave are connected using the rope connecting apparatus  18 . 
     Next, the backing plate portion  114   a  of the metal mounting device  114  is placed in contact with the lower surface of the lower plate portion  22   c , and the backing plate portion  114   a  and the metal brace  113  are fastened using the plurality of fastening bolts  115  such that the metal brace  113  is placed in contact with the upper surface of the lower plate portion  22   c . The lower plate portion  22   c  is thereby held between the metal brace  113  and the metal mounting device  114 , mounting the rope-coupling mounting apparatus  111  onto the lower plate portion  22   c  (a rope-coupling mounting apparatus mounting step). 
     Next, the first link  101  is coupled between the intermediate member  95  of the rope connecting apparatus  18  and the second link  102 , and the link  112  is coupled between the intermediate member  95  of the rope connecting apparatus  18  and the vertical plate portion  114   b  of the metal mounting device  114 . 
     The pair of safety devices  15  are mounted onto the car  2 , and then the coupling member  122  is coupled between the pivoting arms  121  of the pair of (first and second) pivoting shafts  81  that are mounted left and right (a pivoting arm coupling step). In addition, equipment relating to the safety devices  15  is installed by wiring between switches such as an overspeed switch of the speed governor, etc., and the controlling board, and performing adjustment of equipment such as the speed governor, for example. 
     Next, operation will be explained. When the car  2  is moved, the speed governor rope  17  is moved together with the car  2 , thereby moving the speed governor sheave in response to the movement of the car  2 . If the descent speed of the car  2  rises for any reason and reaches a set overspeed that is preset, an overspeed switch that is disposed on the speed governor is activated. Thus, power supply to the hoisting machine that moves the car  2  is stopped, activating the hoisting machine braking apparatus. 
     If the descent speed of the car  2  rises further after the power supply to the hoisting machine is stopped and reaches a safety overspeed that is higher than the set overspeed, the speed governor is activated and the speed governor rope  17  is gripped by the speed governor. Thus, movement of the speed governor rope  17  stops, and the car  2  is displaced downward relative to the rope connecting apparatus  18 . 
     If the car  2  is displaced downward relative to the rope connecting apparatus  18 , the first pivoting shaft  81  is pivoted by means of the safety linking apparatus  19 . Here, the second pivoting shaft  81  is also pivoted interdependently with the first pivoting shaft  81  by the coupling apparatus  16 . The wedges  62  of each of the safety devices  15  are thereby pulled upward by means of the pivoting levers  82  and the chains  83  such that the respective guide rails  1  are gripped by the pairs of wedges  62 . Thus, a braking force is generated on the car  2 , making the car  2  perform an emergency stop. 
     In an elevator safety device  15  of this kind, because the safety frames  31  are fixed onto the vertical stanchions  10  by the respective horizontal bolts  51  applying pressure between the side surfaces of the vertical stanchion grooves  21  and the frame main bodies  41 , and the respective jack bolts  52  applying pressure between the guiding apparatus mounting bases  13  and the horizontal plates  42 , and the safety device main bodies  33  are disposed on the safety frames  31 , the safety frames  31  can be fixed to the car frame  5  and the safety device main bodies  33  can be mounted to the car frame  5  without machining the car frame  5 . Thus, during mounting of the safety device main bodies  33  onto the car frame  5 , time spent on machining the car frame  5  at a factory, etc., can be eliminated, enabling the safety devices  15  to be easily mounted onto the car  2 . Consequently, the installation work period for the safety devices  15  can be shortened, enabling shortening of down time during which the elevator cannot be used to be achieved. Because the frame main bodies  41  on which the safety device main bodies  33  are disposed are inserted inside the vertical stanchion grooves  2 , the safety device main bodies  33  can be prevented from protruding significantly vertically from the car  2 . Thus, the safety devices  15  can be mounted to the car  2  even if there is not sufficient room in the pit of the hoistway, for example. 
     Because the restricting bolts  53  that protrude downward from the horizontal plates  42  to clamp the back surfaces of the frame main bodies  41  against the upper end portions of the vertical stanchions  10  are disposed on the safety frames  31 , the safety frames  31  can be fixed reliably to the vertical stanchions  10 . 
     Because the safety mounting apparatuses  34  are mounted onto the car frame  5  by clamping the upper frame  9 , the safety mounting apparatuses  34  can be easily mounted to the car frame  5  without machining the car frame  5 . 
     Because the actuating apparatuses  35  that displace the wedges  62  to activate the safety device main bodies  33  have: pivoting shafts  81 ; pivoting levers  82  that are pivoted together with the pivoting shafts  81 ; and chains  83  that pull up the wedges  62  by being pulled by the pivoting levers  82  while suspending the wedges  62 , the safety device main bodies  33  can be activated more reliably using a simple configuration. 
     Because the pairs of wedges  62  are disposed on two sides of the guide rails  1 , and the raised wedges  62  are respectively guided in a direction of contact with the guide rails  1  by the pairs of guiding members  63 , the safety device main bodies  33  that are disposed on the safety frames  31  can be made into progressive safety device main bodies. 
     In a method for mounting a safety device  15  of this kind, because the safety units in which the safety device main bodies  33  that are mounted into the safety frames  31  are inserted into the vertical stanchion grooves  21 , and pressure is applied to the horizontal bolts  51  between the side surfaces of the vertical stanchion grooves  21  and the frame main bodies  41  of the safety frames  31  by manipulating the horizontal bolts  51  and pressure is applied to the jack bolts  52  between the guiding apparatus mounting bases  13  and the horizontal plates  42  of the safety frames  31  by manipulating the jack bolts  52 , a need to machine the car frame  5  is eliminated, enabling the safety device main bodies  33  to be mounted to the car frame  5  easily. The safety device main bodies  33  can also be prevented from protruding significantly vertically from the car  2 . 
     Embodiment 2 
     In Embodiment 1, progressive safety device main bodies  33  in which the magnitude of the braking force on the car  2  is maintained stably are disposed on the safety frames  31 , but instantaneous safety device main bodies that generate a braking force against the car  2  rapidly to stop the car  2  almost instantaneously may also be disposed on the safety frames  31 . 
     Specifically,  FIG. 9  is a side elevation that shows an upper portion of a car frame  5  according to Embodiment 2 of the present invention.  FIG. 10  is a cross section that is taken along Line X-X in  FIG. 9 .  FIG. 11  is an exploded perspective that shows the upper portion of the car frame  5  from  FIG. 9 , and  FIG. 12  is an exploded perspective that shows a safety device main body  33  from  FIG. 11 . In Embodiment 2, the rest of the configuration is similar or identical to that of Embodiment 1 except that the configuration of the safety device main body  33  is different from that of Embodiment 1. 
     The safety device main body  33  has: a metal portal fitting (a movable body)  131  that can be moved vertically relative to the frame main body  41 ; a roller (a braking member)  133  that is disposed on the metal portal fitting  131  by means of a roller shaft (a rotating shaft)  132  so as to be displaced vertically together with the metal portal fitting  131 ; and a gripper  134  that is fixed to the frame main body  41  so as to guide the roller  133  in a direction of contact with and separation from the guide rail  1  by the vertical displacement of the roller  133 . 
     The metal portal fitting  131  has: a pair of mounting frames  131   a  that each have a predetermined length and that face each other; and a coupling frame  131   b  that links together first end portions of each of the mounting frames  131   a . The roller shaft  132  is supported between second end portions of each of the mounting frames  131   a . The roller  133  is disposed between the second end portions of each of the mounting frames  131   a  so as to be rotatable around the roller shaft  132 . 
     The metal gripper  134  has: a base portion  134   a  that faces the rear plate portion  41   a  so as to leave a gap; and a guiding portion  134   b  and a bearing portion  134   c  that each rise toward the guide rail  1  from the base portion  134   a  so as to be disposed on two sides in a width direction of the guide rails  1 . 
     The guide rail  1  is inserted into a space that is formed between the guiding portion  134   b  and the bearing portion  134   c . A surface of the guiding portion  134   b  near the bearing portion  134   c  is an inclined surface that is inclined relative to the guide rail  1  in a direction that is further away from the guide rail  1  lower down. A surface of the bearing portion  134   c  near the guiding portion  134   b  is a vertical surface that is parallel to the guide rail  1 . 
     A penetrating slot (a roller shaft escape slot)  135  that is parallel to the inclined surface of the guiding portion  134   b  is disposed on the base portion  134   a . The roller  133  is disposed between the inclined surface of the guiding portion  134   b  and a side surface of the guide rail  1 . The roller shaft  132  is passed through the penetrating slot  135 . Each of the mounting frames  131   a  are respectively disposed on two sides in a thickness direction of the metal gripper  134  so as to support the roller shaft  132  that is passed through the penetrating slot  135 . 
     A first end portion of the chain  83  is connected to the coupling frame  131   b . The position of the roller  133  is a position that is offset toward the guiding portion  134   b  from the central axis of the guide rail  1  when the safety device main body  33  is viewed from a side near the guide rail  1 . The chain  83  is thereby also inclined toward the guiding portion  134   b . The roller  133  is displaced upward relative to the safety frame  31  by the metal portal fitting  131  being pulled up by the chain  83 . 
     The roller  133  contacts the guide rail  1  while being guided by the inclined surface of the guiding member  134   b  and the penetrating slot  135  by being displaced upward relative to the frame main body  41 , and pushes open the gap between the inclined surface of the guiding member  134   b  and the guide rail  1  by being displaced further upward. The metal gripper  134  is thereby displaced in the width direction relative to the guide rail  1  such that the vertical surface of the bearing portion  134   c  contacts the guide rail  1 , and the roller  133  wedges between the inclined surface of the guiding portion  134   b  and the guide rail  1 . The guide rail  1  is thereby gripped between the vertical surface of the bearing portion  134   c  and the roller  133 . When the guide rail  1  is gripped between the vertical surface of the bearing portion  134   c  and the roller  133 , frictional force is generated between the vertical surface of the bearing portion  134   c  and the guide rail  1 , rapidly applying a braking force to the car  2 . Using this construction, the safety device main bodies  33  are instantaneous safety device main bodies in which the braking force on the car  2  is generated rapidly. 
     Thus, even if instantaneous safety device main bodies that grip the guide rails  1  between the rollers  133  and the metal grippers  134  are used as the safety device main bodies  33  that are disposed on the safety frames  31 , similar effects to those in Embodiment 1 can be achieved such as preventing significant vertical protrusion from the car  2  and enabling easy mounting onto the car  2 . 
     Moreover, in each of the above embodiments, restricting bolts  53  are disposed on the horizontal plates  42 , but the restricting bolts  53  may also be omitted provided that a fixed state of the safety frames  31  on the vertical stanchions  10  is ensured by the respective horizontal bolts  51  and the respective jack bolts  52 . 
     In each of the above embodiments, the safety devices  15  are mounted onto the car  2  during elevator remodeling work, but the safety devices  15  may also be mounted onto the car  2  in a newly installed elevator.