Patent Publication Number: US-6907625-B2

Title: Sliding bed

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a sliding bed used in the care or nursing of the elderly or disabled (hereinafter, “patient”) and designed so as to lessen the burden of a patient in a hospital or the like when getting into or out of a bed, or to lessen the burden of a caregiver for such patient. 
   2. Description of the Related Art 
   In conventional nursing beds for the disabled, the predominant art involves the raising up of the upper body of a patient. With just this art, however, a patient cannot get up by himself, nor can he lower his feet from the bed and assume a position as of sitting in a chair. Therefore, this is disadvantageous when considered from the perspective of patient treatment or rehabilitation, as the circulation of the bodily fluids throughout the entire body and the use of muscles throughout the body are far lower than for a healthy person; in addition, being unable to assume a state similar to sitting in a chair is disadvantageous when considered from the point of view of relieving stress and improving the psychological state of a patient. 
   For this reason, art has been proposed to allow a seat and back rest portion to move laterally, as can be seen in Japanese Utility Model Registration #3038378 or Japanese Laid-open Patent Application 2000-042053. Moving the seat or back rest portion laterally allows a patient to lower his feet from a bed, giving the patient the feeling of sitting in a bed. 
   In the sliding beds described in Japanese Utility Model Registration #3038378 and Japanese Laid-open Patent Application 2000-042053, the load on the sliding portion of the bed is supported by leg members, preventing the bed from tipping over during sliding. 
   However, when considered from the perspective of patient care, treatment, and safety, it is preferable that the height of the bed be such that the bed is positioned as close to the floor as possible when the patient is sleeping. For the person providing care, it is preferable that the bed height be raised, to a height that allows a caregiver to give care more efficiently. For this reason, in recent years, it has become standard for nursing beds or beds for the disabled to be configured to allow bed height to be changed. 
   In addition, when moving a patient on a sliding bed into a wheelchair or onto a portable toilet, having the height of the patient&#39;s waist when on the bed higher than the height of the wheelchair and the like results in improved efficiency in care-giving work, as a caregiver can take advantage of the difference in heights when moving the patient. Thus it is preferable that the height of a sliding bed be adjustable. 
   Further, because individual patients will have different body sizes, with the lengths of patients&#39; legs in particular varying from individual to individual, it is difficult to adjust bed height to match individual patients. 
   Further, as in the art disclosed in Japanese Utility Model Registration #3038378 and Japanese Laid-open Patent Application 2000-042053, in cases of a configuration where a sliding portion is not supported by leg members, but support members are provided extending directly from the frame of the bed main body, the load on the sliding portion is centered on the bed end part on the slide side of the movement mechanism, and when a patient is placed thereupon, it is heavy and difficult to move. In addition, a bed used by patients needs to be disinfected or otherwise sterilized periodically, and a metal slide mechanism used in a slide bed can easily suffer from rusting or other such corrosion. In addition, it is necessary to bear in mind that, including the weight of the patient, a load of 100 kg or greater will bear upon the slide mechanism. 
   SUMMARY OF THE INVENTION 
   It is an object of the present invention to devise a slide mechanism, and provide a sliding bed that reduces the burden on a caregiver, by employing a configuration that allows for easy sliding and, further, that allows the height of the bed itself to be easily adjusted. 
   In order to solve the above-described problems, the present invention, in the aspect described in claim  1 , is a sliding bed that includes a bed base, a fixed frame provided on the upper part of the bed base, a movable bed frame provided on the upper part of the bed base and capable of moving in the widthwise direction of the bed base, and a seat and back rest on the movable bed frame; the back rest can be raised up either electrically or manually. The movable bed frame is supported so as to be capable of moving in the widthwise direction of the bed base, by means of at least two or more slide parts provided on both sides, respectively, of the movable frame; thus a configuration is preferable such that the two slide parts include an intermediate slide frame and an upper slide frame that is provided on a side surface of the movable bed frame, and that the intermediate slide frame can slide with respect to the bed base, and the upper slide frame can slide with respect to the intermediate slide frame, by means of support members such as rollers. 
   Further, it is preferable to provide a tipping-over prevention member on the side of the bed base to which the movable bed frame is to be slidingly moved, in order to prevent the bed from tipping over, and to provide a balance weight on the side of the bed base opposite the side to which the movable bed frame is to be slid, or, alternatively, to provide a balance weight that in concert with the sliding movement of the movable bed frame moves to the opposite side, thereby providing stability to the sliding bed. 
   Further, the above-described sliding bed is provided with mats on the upper surfaces of the fixed bed frame and movable bed frame such that the upper surfaces thereof are aligned; of the end surfaces of the mats on the fixed bed frame and movable bed frame that come in contact with each other, one or both are formed to have a downward cutaway with a tapered or curved shape, and a shield is provided below the cutaway shape on either the fixed bed frame or movable bed frame. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1A  is a drawing for explaining a sliding bed in accordance with the present invention. 
       FIG. 1B  is a top view of FIG.  1 A. 
       FIG. 2  is an oblique view showing the present invention in a state of use. 
       FIG. 3  is an exploded oblique view of a sliding bed according to the present invention. 
       FIG. 4A  is a drawing showing a bed in an elevated state. 
       FIG. 4B  is a drawing showing the bed in  FIG. 4A  in a lowered state. 
       FIG. 5A  is an oblique view for explaining a slide part used in the present invention. 
       FIGS. 5B and 5C  are enlargements of portions of FIG.  5 A. 
       FIG. 5D  shows the device in  FIG. 5A  in a slid-out state. 
       FIGS. 6A-6E  are drawings showing a load condition when a movable bed frame of a conventional bed is supported in a manner so as to be slidingly movable on an upper frame and showing different positions of the movable bed frame. 
       FIGS. 7A-7E  are drawings showing a load condition when a movable bed frame of a bed according to the present invention is supported in a manner so as to be slidingly movable on an upper frame and showing different positions of the movable bed frame. 
       FIGS. 8A-8D  are drawings for explaining a mat used in the present invention and showing different shapes of the mat ends. 
       FIG. 9  is a plan view showing an embodiment of a slide bed according to the present invention in which a balance weight is caused to move. 
       FIG. 10  is a drawing for explaining the embodiment shown in  FIG. 9  prior to sliding. 
       FIG. 11  is a drawing for explaining the embodiment shown in  FIG. 9  subsequent to sliding. 
       FIG. 12  is a lateral view of the embodiment shown in FIG.  9 . 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   An explanation will now be given of the preferred embodiment of the present invention, using the accompanying drawings; however, the present invention should not be construed as being limited to such embodiment. 
     FIGS. 1A-6E  show a first embodiment of the present invention. 
   Broadly speaking, the present invention comprises a bed base  1 , a fixed bed frame  2  provided on the upper part of the bed base  1 , a movable bed frame  3  capable of moving to a widthwise side of the bed base  1 , a slide part  4  for moving the movable bed frame  3  to a widthwise side of the bed base  1 , and a mat  5  mounted on the upper part of the bed. 
   These components will be discussed in order. 
   The Bed Base  1  and the Fixed Bed Frame  2   
   For the bed base  1 , a strong material such as steel is used in a configuration that is substantially the same as what is typically used for this type of bed. 
   For example, the bed base  1  can comprise a base frame  11  and an upper frame  13 . The base frame  11  is supported by four bed legs  10 , and the upper frame  13  is provided on the base frame  11  with a link mechanism  12  therebetween. Changes in the height of the upper frame  13  are effected by, for example, expansion and contraction (actuation) of an electric piston and cylinder  14 , as shown in  FIGS. 4A and 4B . 
   The upper frame  13  is configured so that near the center of the bed a space  130  is provided in which a movable bed frame  3  (discussed below) can slide. The portion above the legs is used as the fixed bed frame  2 . Slide parts  4  (discussed below), which can be rollers or the like, are provided on portions facing this space. 
   Further, a tipping-over prevention member  15  is provided on the side of the base frame  11  to which the movable bed frame  3  slides and which is used as a chair. As shown in the figures, this tipping-over prevention member  15  may, for example, be configured so that the bottom surface thereof is disc-shaped and the height of the upper portion thereof is adjusted using a screw; alternatively, standard casters may be used. 
   Further, a balance weight  16  is provided on the side opposite the above-described tipping-over prevention member  15 , that is, on the side of the base frame  11  opposite the side to which sliding is made, such balance weight having a weight that is about 20% of the weight of the patient using the bed, for example, a weight of 20 kg for a patient weighing 100 kg. 
   In cases where the bed base  1  can be fixed in a room or where a bed will not be moved, if the environment is such that the sliding out side and the opposite side can be anchored or otherwise fixed to the floor, it goes without saying that the above-described weight balance  16  does not have to be used. 
   Further, as is described below, the frame on the side on which a patient&#39;s upper body will rest is supported by the movable bed frame  3 . For this reason, the portion of the upper frame  13  on the upper body side is configured so that no particular support is carried out. 
   The Movable Bed Frame  3  and Slide Parts  4   
   As shown in  FIGS. 3 ,  5 A, and  5 D, the movable bed frame  3  slides to a side of the bed base  1 , within the space  130  between the upper frame  13  and the fixed bed frame  2  by means of the slide parts  4 . 
   The movable bed frame  3  is made from a relatively strong material such as steel; in this embodiment, it is formed as a rectangular frame. Levers on both sliding sides form channel-shaped upper slide frames  30 . Upper slide frame support rollers  31 , which are movable within these upper slide frames  30  and which have a width dimension that is slightly smaller than the internal width of the groove of the upper slide frames  30 , are movably inserted therein. 
   These upper slide frame support rollers  31  are fixed to an intermediate slide frame  32 , with consideration given to the amount of sliding from the movable bed frame  3 . 
   For the intermediate slide frame  32 , a channel shaped opening in a direction opposite to that of the upper slide frame  30  is used, and an intermediate slide frame support roller  33  is provided in the space within the intermediate slide frame  32 . The location at which the intermediate slide frame support roller  33  is provided can be, for example, the widthwise center of the upper frame  13  and fixed bed frame  2 . 
   Further, the bottom surface of the intermediate slide frame  32  is supported by intermediate slide frame mounting rollers  34  provided, respectively, on the upper frame  13  and fixed bed frame  2 , on both ends of the space  130 , in the movable bed frame  3  slide direction; the intermediate slide frame  32  is also supported by the intermediate slide frame support roller  33  in such as a manner as to be able to move back and forth along the upper frame  13  and the fixed bed frame  2 . 
   In addition, because the space between the intermediate slide frame mounting roller  34  and the intermediate slide frame support roller  33  is large, in this embodiment, guide rollers  35  are provided; when the slide parts move, these serve to facilitate the transfer to the intermediate slide frame mounting roller  34 . 
   In the above-described embodiment, because a large load bears upon the intermediate slide frame mounting roller  34  during sliding and therefore there is a slight downward positional shift, the intermediate slide frame  32  will bend upwards centered on the intermediate slide frame mounting roller  34 . For this reason, when one tries to pull the intermediate slide frame back, the transfer to the guide roller  35  and intermediate slide frame mounting roller  34  may not occur smoothly. To address this, the intermediate slide frame mounting roller  34  is positioned from 0.5 to 1.0 mm higher, with the precise degree depending on the thickness of the material used for the intermediate slide frame  32 . 
   Further, the upper and intermediate slide frames are disposed vertically with respect to each other and the directions of their openings are opposite to each other; however, the present invention is not limited to such a configuration. That is to say, provided that the movable bed frame can support the load thereupon using at least two slide frames, configurations other than that described above can be used. 
     FIGS. 5A and 5D  show oblique views of the slide part  4 , with  FIG. 5A  showing a contained state and  FIG. 5D  showing a slid-out state. The center of the intermediate slide frame  32  and both ends of the upper slide frame  30  are connected in the sliding direction by a spring  40 . Further, in two places, to the left and right of and near the center of the upper slide frame  30  are formed pinholes  41 ,  42 ; a pin receiving/positioning pin stop block  43  is provided in the center of the intermediate slide frame  32 . By inserting a left/right intermediate slide frame positioning pin  44  into a left/right intermediate slide frame pin hole  41  on the side to which sliding is made, movement of the upper slide frame  30  along the intermediate slide frame  32  in the pushing direction can be controlled. 
   An explanation will be made of the lock mechanism that maintains the upper slide frame  30  in the slid state, using  FIGS. 5A-5D . As a specific lock mechanism, for example, two lock grooves  45 ,  46  are provided on the upper slide frame  30 . Lock block wheels  48 ,  49  provided on a lock removal lever  47  provided on the upper frame  13  (or on the fixed bed frame  2 ) can be inserted into these lock block grooves  45 ,  46 ; therefore, for example, the lock block grooves  45 ,  46  are formed to have the same radius as the lock block wheels and a depth of 2 mm. With regard to the positions at which the lock block grooves  45 ,  46  and the lock block wheels  48 ,  49  are provided, when the bed is used before sliding, the lock block wheels  48 ,  49  are inserted respectively into the two lock block grooves  45 ,  46 ; when the movable bed frame  3  has been slid and is at the position for use as a chair, the foremost lock block wheel  48  is inserted into the deeper lock block groove  46 ; so doing fixes the movable bed frame  3  at the upper frame  13  (or at the fixed bed frame  2 ). 
   When the upper slide frame  30  is moved, the lock block wheels  48 ,  49  roll along the bottom surface or bottom surface corner of the upper slide frame  30 . 
   Next, an explanation will be given of a load support state in a case where the above-described two slide frames are used and in a case where the load is supported simply. 
     FIGS. 6A-6E  show a configuration in which the movable bed frame  3  is simply supported directly on the upper frame  13  by four support rollers (a), (b), (c), and (d).  FIGS. 7A-7E  show a configuration in which the upper slide frame  30  and intermediate slide frame  32  according to the present invention are supported with two upper slide frame support rollers (e), (f), intermediate slide frame mounting rollers (g), (k), intermediate slide frame support roller (i), and guide rollers (h, j) interposed therebetween. 
   As shown in the configurations of  FIGS. 6A-6E  and  7 A- 7 E, the movable bed frame  3  is moved at slide strokes of 0 mm, 120 mm, 240 mm, 360 mm and 480 mm; Table 1 shows the load on each support roller in cases where an intermediate slide frame is not used and a load of 100 kg is applied in the direction indicated by the arrows, and Table 2 shows the load on each support roller when an intermediate support roller is used. 
   As two slide parts are used, the figures in the table show the load on one slide part. 
   
     
       
         
             
             
             
             
             
           
             
               TABLE 1 
             
             
                 
             
             
                 
               Support 
               Support 
               Support 
               Support 
             
             
               Slide amount 
               roller (a) 
               roller (b) 
               roller (c) 
               roller (d) 
             
             
                 
             
           
          
             
                 
             
          
         
         
             
             
             
             
             
             
          
             
               (a) 
                0 mm 
                33 kg 
                 17 kg 
                  0 kg 
               0 kg 
             
             
               (b) 
               120 mm 
                51 kg 
                  0 kg 
                −1 kg 
               0 kg 
             
             
               (c) 
               240 mm 
                58 kg 
                  0 kg 
               −18 kg 
               0 kg 
             
             
               (d) 
               360 mm 
                78 kg 
                  0 kg 
               −28 kg 
               0 kg 
             
             
               (e) 
               480 mm 
               106 kg 
               −56 kg 
                  0 kg 
               0 kg 
             
             
                 
             
          
         
       
     
   
   
     
       
         
             
             
             
             
             
             
             
             
           
             
               TABLE 2 
             
             
                 
             
             
               Slide 
               Support 
               Support 
               Support 
               Support 
               Support 
               Support 
               Support 
             
             
               amount 
               roller (e) 
               roller (f) 
               roller (g) 
               roller (h) 
               roller (i) 
               roller (j) 
               roller (k) 
             
             
                 
             
           
          
             
               (a) 0 mm 
               48 kg 
                 2 kg 
               34 kg 
               0 kg 
                 16 kg 
               0 kg 
               2 kg 
             
             
               (b) 
               48 kg 
                 2 kg 
               51 kg 
               0 kg 
                −1 kg 
               0 kg 
               0 kg 
             
             
               120 mm 
             
             
               (c) 
               48 kg 
                 2 kg 
               67 kg 
               0 kg 
               −17 kg 
               0 kg 
               0 kg 
             
             
               240 mm 
             
             
               (d) 
               48 kg 
                 2 kg 
               82 kg 
               0 kg 
               −32 kg 
               0 kg 
               0 kg 
             
             
               360 mm 
             
             
               (e) 
               58 kg 
               −8 kg 
               98 kg 
               0 kg 
               −48 kg 
               0 kg 
               0 kg 
             
             
               480 mm 
             
             
                 
             
          
         
       
     
   
   As can be seen from these tables, in either case, when pulling out commences, the center of gravity is toward the inside of the bed, meaning that sliding can be accomplished relatively easily. In the states shown in  FIGS. 6C-6E  and  7 C- 7 E, an upwards load bears upon rollers (c) and (i). This becomes somewhat heavy. However, because the movable bed frame  3  is in a state of movement in  FIGS. 6A ,  6 B,  7 A, and  7 B, it is relatively easy to move the movable bed frame  3 . 
   An explanation will now be given of returning from a state in which the movable bed frame  3  has been slid out ( FIGS. 6E and 7E ) to a state in which the bed is used as a standard bed (FIGS.  6 A and  7 A). 
   In cases where an intermediate slide frame is not used, because the load bears on the support roller (a) at the end of the upper frame  13  and the support roller at the far end of the movable bed frame  3 , when the movable bed frame  3  is pulled out to the farthest extent, a load of 106 kg bears upon the support roller (a) and an upwards load of 56 kg bears upon the support roller (b). For this reason, when one attempts to slide the movable bed frame  3  to a standard state, it becomes extremely heavy. 
   In contrast, in cases where the intermediate slide frame  32  is used, as shown in the tables, the load that bears upon the roller (e), which is the outermost roller on the slide side of the upper slide frame  30 , is 48 kg. In addition, a load of 98 kg bears upon the roller (g) on the end of the upper frame  13 . Also, with regards to the portion of the support roller (i) provided in the center of the upper frame  13 , which is in the same positional relationship as the roller (b) when the intermediate slide frame  31  is not used, the upwards load when the movable bed frame  3  is pulled out to the farthest extent is 48 kg. In such a state, if one wishes to slide the upper slide frame  30  to a standard state, because an upwards load of 48 kg bears upon the roller (i), the intermediate slide frame  31  is heavy when sliding is attempted. However, the upper slide frame  30  can be easily moved with just light force, as a load of 58 kg bears upon the roller (e) and an upwards load of 8 kg—which, while in the opposite direction, is not a particularly large force—bears upon the roller (f). Movement to the state shown in  FIG. 7C  can be easily accomplished. Thereafter, through continuous operation, sliding is possible; further, because in the position shown in  FIG. 7D , in which the upper slide frame  30  and intermediate slide frame  31  are at substantially the same position, the load on the support roller (i) is an upwards load of 32 kg, meaning that pulling back can be accomplished with no practical difficulties. 
   Mat  5   
   An explanation will now be given for the mat  5  mounted on the slide bed upper surface. 
   The mat  5  is divided into a leg mat  50 , a waist mat  51  and an upper body mat  52 . 
   The upper body mat  52  can be raised up and is formed so as to be connected with the waist mat  51  with an appropriate means such as a cover, so that when the upper body mat  52  is in a down position there is no gap between it and the waist mat  51 . 
   The leg mat  50 , waist mat  51 , and upper body mat  52  are configured so as to be mounted upon the mat mounting bodies  60 ,  61  and  62 , respectively; the waist mat  50  and the mat mounting body  60  are mounted on the fixed bed frame  2  and fixed thereto with appropriate means. Further, the waist mat  51  and the mat mounting body  61  are mounted upon the movable bed frame  3  and fixed thereto with appropriate means. Further, the upper body mat  52  and the mat mounting body  62  are mounted on the movable bed frame  3  on the side opposite the leg mat  50 , with the waist mat  51  interposed therebetween, and the end of the mat mounting body  62  on the waist mat  51  side is pivotably supported by a pivot support  36  provided on the movable bed frame  3 , and the bottom surface of the mat mounting body  62  is supported by the movable bed frame  3 . Then, by electric or manual means not shown in the figures, the end of the mat mounting body  62  can be raised up with the pivot support  36  as the rotation shaft. 
   Therefore, the waist mat  51  and the upper body mat  52  move unitarily with the movable bed frame  3 . 
   The shape of the ends of the mat  5  will be discussed. 
   On the end surfaces of the leg mat  50  and waist mat  51  that come in contact with each other, the lower sides of the mat ends are formed to have a cutaway shape. 
   The cutaway shape can be a tapered shape (e.g.,  FIGS. 8A and 8B ) or it can be a curved shape (FIG.  8 C). The position at which the cutaway shape is provided is the lower side of the mat; as shown in  FIG. 8A , this can start virtually at the top edge; however, it is preferable to have this start at a position that is one-third of the mat thickness from the top. The cutaway shape may be provided on one or both of the leg mat  50  and waist mat  51 . 
   The reason for providing cutaway shapes in such a manner is, when the bed is made to slide, the resistance of flexible mats is large, and the force needed for causing sliding becomes large. 
   Further, because the covers or sheets normally covering the leg mat  50  and waist mat  51  have but a small contact surface, there are only small portions that will suffer wear; in addition, the sheets are unlikely to get tangled, and can be placed on the mats easily. 
   Furthermore, an expanded polyurethane material with a relatively low specific gravity of 0.025 is generally used for the mat&#39;s upper surface side, and an expanded polyurethane material with a relatively high specific gravity of 0.07, is used for the bottom surface side. Therefore, by providing, as described above, a configuration such that the lower side of one or both sides of the mat end is cut away, the mat resistance can be lowered, meaning that pulling-out resistance can be lowered. 
   Because a configuration in which the lower side of a mat end has a cutaway shape will allow a draft to pass through from the mat end, it is preferable to provide a shielding plate  63 , as shown in FIG.  8 D. 
   Other Embodiment 
   Next, in the embodiment shown in  FIGS. 9  to  12 , the balance weight  16  described above is not fixed to the bed, but moves in accordance with slide amount. 
   Thus the intermediate slide frame  32  and a moving balance weight  70  capable of moving along a moving guard rail are connected by a wire  72  that changes direction by means of a wire sheave  71  provided on the upper frame  13  (or fixed bed frame  2 ). 
   Therefore, as shown in  FIG. 11 , when the upper slide frame  30  is moved from the state shown in  FIG. 10  to the right side, the intermediate slide frame  32 , in accordance with the sliding of the movable bed frame  3 , moves in the opposite direction of the movable bed frame  3  slide direction, by means of the wire  72 , operating to offset the movement of the center of gravity of the movable bed frame  3 . Therefore, the movable bed frame  3  can be pulled in either direction, increasing the range of use of the sliding bed. 
   It should be noted that while the above-described moving weight balance  70  can be used to prevent tipping over, in order to provide greater protection against tipping over, it is preferable to provide tipping-over prevention members  15  on both directions of the bed base  1 , as shown in FIG.  12 . 
   Effect of the Invention 
   As described above, a sliding bed according to the present invention has a configuration in which both sides of a movable bed frame are caused to slide using two or more slide parts, thereby allowing movement to commence with that slide part having the least resistance to sliding. For this reason, during slide commencement, when much force is usually needed, movement can be effected using relatively small force. 
   A sliding bed according to the present invention is stable even when the height is adjusted, and the height can be freely adjusted; therefore, when a patient on a sliding bed is transferred to a wheelchair or portable toilet, the height of the sliding bed can be adjusted to be slightly higher than the wheelchair or portable toilet, and the patient can be transferred to the wheelchair or the like without being carried, by making use of this difference in height, resulting in far greater efficiency in care-giving tasks. 
   Further, because the tipping-over prevention member and slide parts are formed unitarily, height adjustment of the bed is easy. Further, by providing a tipping-over prevention member or a balance weight on the side of the bed base opposite the side to which sliding is made, the tipping over of a sliding bed can be more safely assured. 
   Further, by providing a moving balance weight that moves to the opposite side in concert with the sliding movement of the movable bed frame, the sliding bed can be slid in either direction, resulting in a significant expansion of uses for the bed. 
   Explanation of the Reference Numbers 
   
       
         1 : BED BASE 
         10 : BED LEG 
         12 : LINK MECHANISM 
         13 : UPPER FRAME 
         130 : SPACE 
         14 : ELECTRIC PISTON AND CYLINDER 
         15 : TIPPING-OVER PREVENTION MEMBER 
         16 : BALANCE WEIGHT 
         2 : FIXED BED FRAME 
         3 : MOVABLE BED FRAME 
         30 : UPPER SLIDE FRAME 
         31 : UPPER SLIDE FRAME SUPPORT ROLLER 
         32 : INTERMEDIATE SLIDE FRAME 
         33 : INTERMEDIATE SLIDE FRAME SUPPORT ROLLER 
         34 : INTERMEDIATE SLIDE FRAME MOUNTING ROLLER 
         35 : INTERMEDIATE SLIDE FRAME GUIDE ROLLER 
         36 : PIVOT SUPPORT 
         4 : SLIDE PART 
         40 : SPRING 
         41 ,  42 : PINHOLE 
         43 : PIN RECEIVING/POSITIONING PIN STOP BLOCK 
         44 : PIN 
         45 ,  46 : LOCK GROOVE 
         47 : LOCK REMOVAL LEVER 
         48 ,  49 : LOCK BLOCK WHEEL 
         5 : MAT 
         50 : LEG MAT 
         51 : WAIST MAT 
         52 : UPPER BODY MAT 
         60 ,  61 ,  62 : MAT MOUNTING BODY 
         63 : SHIELDING PLATE 
         70 : MOVING BALANCE WEIGHT 
         71 : WIRE SHEAVE 
         72 : WIRE