JP2009061199A - Operating apparatus for wheelchair foot plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating apparatus for a wheelchair foot plate which enables the installation work of an operating means for interlock-connecting an operation lever and a foot plate, and the adjusting work to easily be performed, and keeps the application handling simplified. <P>SOLUTION: The operating means 40 which interlock-connects the operation lever 21 being installed on the side section of a main body frame 2 and the foot plate 9 is constituted of an elastic tube 41 having elasticity, a wire 42, a fixing device 43, and a wire connecting device 55. In this case, the elastic tube 41 is connected with the operation lever 21, and stretches when a large tensile force being a tensile force by a normal activating operation or higher is applied. The wire 42 is freely slidably inserted in the elastic tube 41 and enables the pulling-out length to be adjusted. The fixing device 43 connect-fixes the wire 42 to the elastic tube 41. The wire connecting device is connected with the end section of the wire 42 and detachably fitted on the rear side section of the foot plate 9. The fixing device 43 is equipped with a supporting body 44 and a fixation lever 45. In this case, the supporting body 44 is attach-fixed in a manner to go along the external surface of the elastic tube 41. The fixation lever 45 is turnably attached to the supporting body 44. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a footplate operating device for a wheelchair including a footrest having a footplate on which a wheelchair user's foot is placed.

  A conventional footrest of this type of wheelchair has a pair of foot plates that are pivotally supported by a pair of mounting shafts extending forward from both front sides of the main body frame, and the two foot plates are used in a lateral position where they approach each other. (Closed position) and a standby position (open position) that stands up upward, and the foot plate rotates from an open position where it stands up unexpectedly toward a closed side position. In order to prevent this, a locking device using a forced frictional resistance by a spring, a screw or the like is provided at a pivotal support portion between the foot plate and the mounting shaft.

  When the wheelchair user gets on or off the wheelchair, the user himself / herself or his / her assistant uses his / her hand or foot to turn the footplate upright so that the footplate does not get in the way. After the wheelchair user sits on the seat of the wheelchair, both foot plates are rotated to a laterally closed position (use position) approaching each other and stopped so that the feet are placed on both foot plates.

  However, the above-mentioned opening and closing operations of both foot plates are performed directly by a wheelchair user or an assistant using his / her hands or feet, and in particular, when the wheelchair user is a disabled person or an elderly person, It is very difficult and often awkward to bend forward and open and close the foot plate. In addition, when the assistant performs the opening and closing operation of the foot plate, it is necessary to bend the waist in front of the wheelchair or to crouch down and rotate the foot plate. If there is not enough space, opening and closing operations are very difficult. In addition, since the user himself or his / her assistant touches the footplate with dirt or bacteria on the shoe soles walking on the streets, hospitals, toilets, etc., it is a serious problem in terms of hygiene. This type of wheelchair is regularly cleaned and disinfected, especially because there are concerns about infections in medical facilities.

  In order to solve the above-mentioned problems of the conventional wheelchair, both foot plates can be used without touching the foot plates directly by the operating means that interlocks and connects the operation levers provided on the side portions of the main body frame and the foot plates. For example, Patent Literature 1, Patent Literature 2 and the like are known as wheelchair footplate operation devices that enable the user to enter and exit the door and facilitate the user's getting on and off and the assistance of the assistant.

  The footplate operating device for a wheelchair disclosed in Patent Document 1 has a biasing means (coil spring) that is constantly biased so that both footplates rotate to an open position where the footplate stands up upward. A structure in which both foot plates are rotated to a lateral use position (closed position) approaching each other against the biasing means (coil spring) by an operating means (operation wire) for interlockingly connecting the operation lever and the foot plate. It is.

  In such a wheelchair described in Patent Document 1, since the biasing means such as a coil spring that constantly biases the foot plate to the open position (standby position) standing upward is provided, not only the structure becomes complicated. If dirt or bacteria attached to the foot plate adhere to the biasing means, it is difficult to wash and remove. In addition, there is a risk that the foot plate, which is always urged, suddenly jumps up to the open position (standby position) standing upward due to an erroneous operation of the operation lever, which is difficult to use. Furthermore, in order to accommodate the height adjustment of the foot plate, the operation wire, which is the actuating means, has a considerable slack. However, if another object is caught on the slack operation wire, the operation lever may be operated incorrectly. May be incurred.

On the other hand, the foot plate operating device described in Patent Document 2 is based on the proposal of the inventor of the present application, but a specific technical configuration is sufficiently disclosed for the operating means for interlockingly connecting the operating lever and the foot plate. There wasn't. The inventor of this application succeeded in practical use by making the foot plate operating device proposed in Patent Document 2 a specific configuration, has a simple structure, is easy to use, and is excellent in terms of safety. A wheelchair footplate operating device has been proposed and a patent has already been obtained (see Patent Document 3).
JP 2003-310664 A JP 2005-192959 A Japanese Patent No. 3910624

  The present invention is an improvement of the foot plate operating device for a wheelchair disclosed in Patent Document 3 (Japanese Patent No. 3910624), and has a simpler structure of the operating means for interlockingly connecting the operating lever and the foot plate. An object of the present invention is to provide a wheelchair footplate operating device that can be easily assembled and adjusted, and that is easier to use and handle.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a footrest provided on a front portion side of a body frame of a wheelchair has a pair of attachment shafts extending forward from both sides of the front portion of the body frame, and the attachment shafts. And a pair of foot plates pivotally supported at the side ends thereof, and an operating lever provided on a side portion of the main body frame and an operating means for interlockingly connecting the foot plate to the foot. A foot plate operating device configured to be able to rotate between a lateral use position (closed position) in which the plates approach each other and a standby position (open position) standing up upward, wherein the operating means includes the operation lever An elastic tube that stretches when a tensile force greater than a normal operating force is applied to the wire, and a wire that is slidably inserted into the elastic tube and has an adjustable draw length. A fixing tool for connecting and fixing the wire to the elastic tube, and an end portion of the wire is connected to a rear side portion of the foot plate close to the mounting shaft, and an end portion of the elastic tube is connected to the elastic tube. A foot plate operating device for a wheelchair connected to an operating lever and rotating to a standby position (open position) where the foot plate is lifted up by the elastic tube and wire and stands up when the operating lever is operated. The fixing device has a U-shaped support body that is attached and fixed so as to follow the outer surface of the elastic tube, and an L-shaped fixing member that includes a pressing protrusion formed by bending at the tip of the arm portion. And a distal end portion of the arm portion is rotatably attached to the support body via a pivot pin, and the arm portion is attached to the support body. When rotating so as to approach, the pressing protrusion presses the elastic tube, the wire inserted into the elastic tube is connected and fixed to the elastic tube, and the arm portion is separated from the support body. The foot plate operating device for a wheelchair is configured to release the pressing of the elastic tube by the presser protrusion when rotated as described above.

  The invention according to claim 2 is provided with a notch recess for accommodating the end of the elastic tube in the side surface portion of the operation lever, and a latching pin protruding in the lateral direction in the notch recess, On the other hand, a short screw-like shaft body is detachably inserted and fixed from the opening of the end portion of the elastic tube, the end portion into which the screw-like shaft body is inserted is bent and hooked on the latch pin, and The elastic tube is connected to the operation lever by being housed and fixed in the notch recess.

  According to a third aspect of the present invention, the connecting pin fixed laterally to the end of the wire is provided with an annular groove at an intermediate portion, and is detachably attached to the rear side of the foot plate. The wire connector includes a main body block in which a connecting hole into which the connecting pin is inserted is opened rearward, and a receiving plate that supports a front foot plate that extends forward from the bottom of the main body block from below. And a presser spring plate that is urged and attached to the upper surface of the main body block via a tightening screw, sandwiching the foot plate between the receiving plate portion and the presser spring plate, The wire connector is attached and fixed to the rear side of the foot plate, the connection pin fixed to the end of the wire is inserted into the connection hole of the body block, and the body block is inserted into the annular groove. A by engaging the inserted split pin from the side, wherein the connecting pin is rotatably connected to the oriented block.

  Since the footplate operating device of the present invention configured as described above can be opened and closed without touching the footplate, the wheelchair user can easily open and close the footplate while sitting on the seat. In addition, it is not necessary for the caregiver to bend or crouch, so assistance is facilitated. Moreover, the structure is simple and it can be easily attached to an existing wheelchair. Further, since the operating means can be adjusted only by adjusting the drawing length of the wire inserted into the elastic tube corresponding to the height adjustment of the foot plate, the elastic tube and the wire constituting the operating means can be adjusted. It is possible to arrange them in a substantially straight line without causing excessive slack. Therefore, there is no possibility that the loosened wire will get in the way or get caught by other objects and cause an erroneous operation.

  Furthermore, even if the operating lever is forcibly operated by mistake with the foot placed on the foot plate, the elastic tube extends and absorbs the pulling force, so that no excessive external force is applied to the operating device. In addition, at this time, even if the foot placed on the foot plate is removed, the elastic tube contracts slowly, so there is no risk of the foot plate jumping up suddenly.

  Further, when a clearance is provided between the shaft hole of the bearing portion provided in the foot plate and the mounting shaft to reduce the rotational frictional resistance of the foot plate with respect to the mounting shaft, and when the operation lever is released, If the foot plate is rotated by its own weight and returned to the lateral use position (closed position), it can be smoothly rotated to the lateral use position (closed position) without requiring an external force.

  As described above, the foot plate operating device of the present invention has a simple structure, is easy to use, and is excellent in terms of safety.

  In particular, according to the first aspect of the present invention, since the fixture of the actuating means can be fixed and released by a one-touch turning operation, the adjustment operation of the length of the wire inserted into the elastic tube is extremely easy. In addition, this can be done quickly, and damage to the elastic tube can be reduced.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the operation of connecting and removing the end of the elastic tube with respect to the operation lever can be performed easily and quickly.

  Further, according to the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the end portion of the wire is connected to the foot plate without adding any processing to the foot plate. Since the rear side can be easily connected to a predetermined position, it is convenient to attach the foot plate operating device to a ready-made wheelchair.

  As a whole, the assembling operation and the adjusting operation of the elastic tube and the wire constituting the operating means can be easily and quickly performed, and the use and handling can be simplified.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG.1 and FIG.2 has shown the use condition of the wheelchair 1 which attached the footplate operating device by this invention. Since the wheelchair 1 itself is the same as an off-the-shelf product that is commercially available, the general configuration will be described. Basically, a large-diameter rear wheel 3 and a small-diameter front wheel 4 are attached to a main body frame 2 formed of a metal pipe. In the assembled configuration, a footrest 5 is provided on the front side of the main body frame 2.

  The footrest 5 has lifting pipes 7 and 7 attached to support pipes 6 and 6 formed on both sides of the front part of the main body frame 2 so that the lifting and lowering length can be adjusted. A pair of extending mounting shafts 8 and 8 are projected, and the side end portions of the pair of foot plates 9 and 9 are pivotally supported by the mounting shafts 8 and 8 so that the foot plates 9 and 9 are mutually connected. It is the same as the conventional wheelchair 1 in that it can be rotated between the approaching side use position (closed position) approaching and the standby position (opening position) standing upward (see FIG. 3). Then, as shown in FIG. 4, the foot plates 9 and 9 are moved up and down by adjusting the protruding length of the lifting pipes 7 and 7 by a known lifting mechanism (not shown) incorporated in the support pipes 6 and 6. Since the structure which can be made is also the same as the ready-made wheelchair 1, description is abbreviate | omitted for details.

  The foot plate operating device 20 for opening and closing the foot plates 9 and 9 is configured such that the operating lever 21 provided on the side portion of the main body frame 2 and the foot plate 9 are interlocked and connected by the operating means 40 to move the foot plate 9 sideways. It is configured to be able to rotate between a use position (closed position) and a stand-up position (open position) that stands upward, and is attached to both sides of the front part of the main body frame 2 so that both foot plates 9, 9 are individually It is designed to open and close. Hereinafter, only one foot plate operating device 20 will be described.

  FIG. 5 shows a state in which the foot plate 9 is turned to the open position (standby position) in which the foot plate 9 stands upward with the foot plate operating device 20. The foot plate 9 has a bearing portion 10 provided integrally on the side end portion, and the shaft hole 11 has an inner diameter slightly larger than the diameter of the mounting shaft 8, and a gap is formed between the foot plate 9 and the mounting shaft 8. When the operation lever 21 is released by reducing the rotational frictional resistance with respect to the mounting shaft 8, the foot plate 9 smoothly rotates around the mounting shaft 8 due to its own weight to the laterally closed position (use position). Configured to go back.

  As shown in FIGS. 5 to 8, the operation lever 21 is assembled between the mounting base 25 and the cover plate 34 so as to be rotatable by a predetermined angle to constitute a unit. The operation lever 21 is made of a lightweight metal material such as aluminum, and a pivot hole 22 is provided at the lower end. A synthetic resin grip ball 24 is provided at the upper end of the operation lever 21.

  The mounting base 25 is a molded product of hard vinyl chloride, the contour shape is formed in a quadrant shape, and a support shaft 26 that fits in the pivotal support hole 22 of the operation lever 21 protrudes from the corner. A stopper 27 for restricting the operating position of the operation lever 21 and a stopper 28 for restricting the release position are provided on both ends of the arc. Further, mounting holes 29 and 29 for the ball plunger 30 are provided in the vicinity of both stoppers 27 and 28. The ball plunger 30 is provided to lock and hold the operation lever 21 in the operating position. As shown in FIG. 7, a ball 32 biased by a push spring 31 is provided on the side surface of the operation lever 21. The operation lever 21 is latched and held by engaging with the recess 33. Such a ball plunger 30 is a known locking means used in various mechanical devices. After the pivot support hole 22 of the operation lever 21 is fitted to the support shaft 26 of the mounting base 25 and rotatably assembled, the cover plate 34 is fixed to the mounting base 25 using a set screw 35, and the operation lever 21 is moved. An operating lever unit is constructed that is rotatably mounted between the stoppers 27 and 28 with the support shaft 26 as a fulcrum.

  The mounting base 25 and the cover plate 34 are manufactured in a symmetrical shape around the support shaft 26 at the corner, and the ball plunger 30 is mounted in a mounting hole 29 provided in the vicinity of the stoppers 27 and 28 for regulating the operating position. It is attached to.

  On the other hand, on the side surface of the operating lever 21, a notch recess 36 that holds an end 41 a of an elastic tube 41 of an operating means 40 described later and accommodates in a fixed state, and a pivotal support hole in the notch recess 36. The latch pin 37 which protrudes sideways substantially parallel to 22 is provided (refer FIG. 9). As shown in FIGS. 6 and 9, the notch recess 36 is formed in a substantially triangular shape in which the contour shape is such that the upper wall surface 36a and the inclined side wall surface 36b are continuous via the arcuate wall surface 36c. The latch pin 37 protrudes from the inner corner of the notch recess 36 adjacent to the arc-shaped wall surface 36c, and press fits the end portion 41a of the elastic tube 41 between the arc-shaped wall surface 36c to be fixedly accommodated. A portion 38 is formed.

  As shown in FIG. 9, a short threaded shaft (preferably a hollow set) 39 is detachably fitted and fixed to the end 41a of the elastic tube 41 from its opening 41b. The end 41a into which the threaded shaft 39 is inserted is bent and hooked on the latch pin 37, and the elastic tube 41 is operated by being press-fitted into the space 38 of the notch recess 36 and fixedly accommodated. The lever 21 is connected. Since the threaded shaft 39 is fitted and fixed to the end portion 41a, the end portion 41a does not extend and disengage from the latch pin 37 even if a tensile force acts on the elastic tube 41. The end 41a can be easily removed from the latch pin 37 by removing the threaded shaft 39.

  As shown in FIG. 8, the operating lever unit mounting base 25 having the above configuration is fixed to a frame pipe 70 at the front of the main body frame 2 using a band 71 and a set screw 72. The mounting base 25 can be attached and fixed to the side plate of the armrest of the main body frame 2.

  9 and 10 show the operating means 40 for interlockingly connecting the operation lever 21 and the foot plate 9. The operating means 40 includes an elastic tube 41, a metal wire 42 that can be slidably inserted into the elastic tube 41, and a fixture that connects and fixes the wire 42 to the elastic tube 41. 43. The elastic tube 41 is preferably a pressure-resistant and water-resistant polyurethane tube having moderate flexibility and stretchability that is extended when a pulling force (3 Kg or more) larger than a normal operation force is applied to the operation lever 21. Note that the elastic tube 4 hardly expands or contracts by the normal operating force of the operating lever 21.

  The fixing tool 43 includes a support body 44 having a U-shaped cross section that is attached and fixed so as to follow the outer surface of the elastic tube 41, and an L-shaped fixing lever 45. The support body 44 is manufactured by punching and bending a metal plate, and provided with a mouth ring portion 47 that is wound and fixed to the elastic tube 41 at one end of a U-shaped receiving portion 46 that follows the outer surface of the elastic tube 41. It has substantially triangular side plates 48, 48 that are connected to both side edges of the letter-shaped receiving portion 46 and are formed to gradually widen from the mouth ring portion 47 toward the other end. The fixing lever 45 is formed in an L shape in which a pressing protrusion 50 is bent at the tip of the arm portion 49, and the tip portion of the arm portion 49 is extended to the wide portions of the side plates 48, 48 of the support body 44. It is attached to the support body 44 so as to be rotatable via a pivot pin 51.

  Then, as shown in FIG. 10, when the arm portion 49 of the fixing lever 45 is rotated from the release position indicated by the phantom line to the fixed position approaching the support body 44 indicated by the solid line, the presser protrusion 50 is elastic. The tube 41 is pressed, and the wire 42 inserted into the elastic tube 41 is connected and fixed to the elastic tube 41.

  As shown in FIGS. 9 and 10, a connecting pin 52 for connecting to the foot plate 9 is fixed to the end of the wire 42 in the lateral direction. The connecting pin 52 is provided with an annular groove 53 at an intermediate portion.

  On the other hand, a connector 55 of the wire 42 is detachably attached to the rear side portion of the foot plate 9. The wire connector 55 includes a synthetic resin main body block 56 in which a connection hole 57 into which the connection pin 52 is inserted is opened rearward, and a foot plate 9 extending forward from the bottom of the main body block 56. A receiving plate portion 58 that supports the plate from below, a mounting step portion 59 formed on the upper surface portion of the main body block 56, and a stainless steel plate that is urged and attached to the mounting step portion 59 via a tightening screw 60. And a presser spring plate 61 made of metal. The mounting step portion 59 has a support step portion 59a and a contact step portion 59b in the rear portion, and the step portion 59c provided with the screw hole 62 of the tightening screw 60 is formed lower and larger than the support step portion 59a. . The presser spring plate 61 is provided with a mounting hole 63 for a tightening screw 60, and a presser portion 61a is formed by bending the tip portion downward.

  On the other hand, a rubber sheet 64 is installed on the receiving plate 58 for the purpose of preventing the foot plate 9 from being damaged and for preventing slippage.

  The wire connector 55 having the above-described configuration is configured such that the foot plate 9 is sandwiched between the receiving plate portion 58 provided with the rubber sheet 64 and the presser spring plate 61, and the presser spring plate 61 is tightened with the tightening screw 60 to rear the foot plate 9. Removably attached to and fixed to. Then, the connecting pin 52 fixed to the end of the wire 42 is inserted into the connecting hole 57 of the main body block 56, and the split pin 54 inserted from the lateral direction into the main body block 56 is engaged with the annular groove 53 of the connecting pin 52. Thus, the connecting pin 52 is rotatably connected to the main body block 56, the end of the wire 42 is connected to the rear side of the foot plate 9, and the operation lever 21 and the foot plate 9 are connected to the elastic tube 41 and the wire 42. It is linked and connected through. At this time, the fixing lever 45 of the fixing tool 43 is rotated to the release position indicated by the phantom line in FIG. 10 and inserted into the elastic tube 41 in a state where the pressing of the elastic tube 41 by the pressing protrusion 50 is released. If the length of the drawn wire 42 is adjusted and the elastic tube 41 and the wire 42 are arranged substantially linearly, there is no risk that the connected elastic tube 41 and the wire 42 are loosened and caught on other objects. The operability of the operation lever 21 can be improved.

  2 and 5 show a state in which the operating lever 21 of the foot plate operating device 20 configured as described above is operated. The foot plate 9 is pulled up by the elastic tube 41 and the wire 42 and rotated to an open position (standby position) that stands up around the mounting shaft 8. As shown in FIG. 8, the operation lever 21 is moved to the ball plunger 30. The foot plate 9 is locked and held at the open position. Thus, the wheelchair user can easily get on and off the wheelchair 1 with both the foot plates 9 and 9 being rotated to the open position.

  After the user sits on the seat of the wheelchair 1, when the operation lever 21 is tilted forward and the release operation is performed so as to come into contact with the stopper 28, the pulling action of the elastic tube 41 and the wire 42 is released and the closed position stands up 1, the foot plate 9 is smoothly rotated downward with almost no frictional frictional resistance around the mounting shaft 8 due to its own weight, and as shown in FIG. Return to. In this closed position, as shown in FIGS. 11 and 12, the side end portions of the foot plates 9 and 9 (the vicinity of the bearing portion 10) are in contact with and supported by the lower end portions 7a and 7a of the elevating pipes 7 and 7. Then, since both foot plates 9 and 9 stop at the lateral use position (closed position) close to each other, the wheelchair user uses the foot portion on both foot plates 9 and 9.

  On the other hand, as shown in FIG. 1, even when the wheelchair user places the foot on both foot plates 9, 9, even if the operating lever 21 is accidentally operated by force, the elastic tube 41 is extended and operated. Since the pulling force of the lever 21 is absorbed, there is no possibility that an unreasonable external force is applied to the operating device to cause inconvenience such as failure. At this time, even if the foot portion placed on the foot plate 9 is removed, the elastic tube 41 contracts slowly, so there is no risk of the foot plate 9 jumping up rapidly, which is excellent in terms of safety.

  Further, when the height of the foot plates 9 and 9 is adjusted by moving the elevating pipes 7 and 7 up and down, the fixing lever 45 of the fixture 43 of the actuating means 40 is shown in a release position indicated by a virtual line in FIG. The elastic tube 41 and the wire 42 are connected to each other by adjusting the pull-out length of the wire 42 with respect to the elastic tube 41 in a state where the elastic tube 41 is released from being pressed by the pressing protrusion 50. Therefore, the operability of the operation lever 21 can be ensured satisfactorily. Further, it is advantageous to arrange the connected elastic tube 41 and the wire 42 in substantially the same straight line, which is advantageous in terms of safety and handling, and particularly when the wheelchair 1 is folded, the elastic tube 41 or the wire 42 is touched. Inconveniences such as entanglement will not occur.

It is a perspective view which shows the use condition of the wheelchair provided with the footplate operating device which concerns on this invention. It is a perspective view which shows the operation operation of the footplate operating device of a wheelchair same as the above. It is a perspective view which shows the state of the open position (standby position) which stood up the footplate of the wheelchair same as the above. It is a perspective view explaining the height adjustment mechanism of the footplate of a wheelchair same as the above. It is a side view which shows the operation operation state of a footplate operating device same as the above. It is a disassembled perspective view which shows the operation lever unit of a footplate operating device same as the above. It is a vertical side view which shows the assembly state of an operation lever unit same as the above. It is a partially notched side view which shows the state which mounted | wore the main body frame of the wheelchair with the operation lever unit same as the above. It is a principal part disassembled perspective view explaining the component of a footplate operating device same as the above. It is a longitudinal cross-sectional view which shows the fixing tool and wire connector of a footplate operating device same as the above. It is a rear side view which shows the state which the footplate rotated to the open position (standby position) which stood up upwards. It is a principal part top view which shows the state which the footplate rotated to the horizontal closed position (use position).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Body frame 3 Rear wheel 4 Front wheel 5 Footrest 6 Support pipe 7 Lifting pipe 8 Mounting shaft 9 Foot plate 10 Bearing part 11 Shaft hole 20 Foot plate operating device 21 Operation lever 22 Pivoting hole 24 Grip ball 25 Mounting base 26 Support Shafts 27, 28 Stopper 29 Mounting hole 30 Ball plunger 31 Push spring 32 Ball 33 Recess 34 Cover plate 36 Notch recess 37 Latching pin 38 Protruding portion 39 Screw shaft 40 Actuating means 41 Elastic tube 41a End portion of elastic tube 42 Wire 43 Fixing tool 44 Support body 45 Fixing lever 46 U-shaped receiving part 48 Side plate part 49 Arm part 50 Pressing protrusion 51 Pivoting pin 52 Connecting pin 53 Annular groove 55 Wire connecting tool 56 Main body block 57 Connecting hole 58 Receiving plate part 59 Mounting step 60 Tightening screw 61 Sheet 64 Rubber sheet

Claims (3)

A footrest provided on the front side of the main body frame of the wheelchair includes a pair of mounting shafts extending forward from both sides of the front portion of the main body frame, and a pair of feet whose side ends are pivotally supported on the mounting shaft. A plate,
A lateral use position (closed position) in which the foot plates approach each other, and a standby position in which the foot plates are raised upward by an operating means that interlocks and connects the operation lever provided on the side portion of the main body frame and the foot plate ( A foot plate operating device configured to be rotatable to an open position),
The actuating means (40) has an elastic tube (41) having elasticity that extends when a pulling force larger than a normal operating force is applied to the operating lever (21), and is slidable on the elastic tube (41). A wire (42) inserted into the wire (42), the length of which can be adjusted, and a fixture (43) for connecting and fixing the wire (42) to the elastic tube (41). The end of the wire (42) A portion is connected to the rear side of the foot plate (9) close to the mounting shaft (8), and an end of the elastic tube (41) is connected to the operation lever (21),
When the operation lever (21) is operated, the foot plate (9) is pulled up by the elastic tube (41) and the wire (42) and turned to a standby position (open position) that stands upward. In the foot plate operating device,
The fixture (43) is formed by bending a U-shaped support body (44) attached and fixed so as to follow the outer surface of the elastic tube (41) and a tip of the arm portion (49). And an L-shaped fixing lever (45) having a pressing protrusion (50), and a tip portion of the arm portion (49) rotates to the support body (44) via a pivot pin (51). It is attached as possible
When the arm portion (49) is rotated so as to approach the support (44), the presser protrusion (50) presses the elastic tube (41) and is inserted into the elastic tube. (42) is connected and fixed to the elastic tube (4), and when the arm portion (49) is rotated away from the support (44), the elastic tube formed by the pressing protrusion (50). A footplate operating device for a wheelchair characterized by releasing the pressing of (41). A notch recess (36) for accommodating the end (41a) of the elastic tube (4) is provided on a side surface of the operation lever (21), and a latch pin (37) is provided in the notch recess (36). ) Protruding sideways,
On the other hand, a short screw shaft (39) is detachably inserted and fixed from the opening (41b) of the end (41a) of the elastic tube (41), and the screw shaft (39) is inserted. The elastic tube (4) is connected to the operating lever (21) by bending the end (41a) and hooking it on the latch pin (37) and accommodating and fixing it in the notch recess (36). The foot plate operating device for a wheelchair according to claim 1. An annular groove (53) is provided at an intermediate portion of the connecting pin (52) fixed to the end of the wire (42) in a lateral direction,
On the other hand, the wire connector (55) that is detachably attached to the rear side of the foot plate (9) has a connection hole (57) into which the connection pin (52) is inserted and opened rearward. A main body block (56), a receiving plate portion (58) for supporting a front foot plate (9) extending forward from the bottom of the main body block (56) from below, and an upper surface of the main body block (56) A presser spring plate (6) that is urged and attached so as to be pushed down via a tightening screw (60),
The foot plate (9) is sandwiched between the receiving plate portion (58) and the presser spring plate (6), and the wire connector (55) is attached and fixed to the rear side portion of the foot plate (9). The connecting pin (52) fixed to the end of the wire (42) is inserted into the connecting hole (57) of the main body block (56), and the main body block (56) is inserted into the annular groove (53). 3. The connecting pin (52) is rotatably connected to the main block (56) by engaging a split pin (54) inserted from a lateral direction into the main block (56). Wheelchair footplate operation device.

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