JP5285295B2 - Folding wheelchair crossbar fixture - Google Patents

Description

  The present invention relates to a method for fixing a cross bar of a folding wheelchair. More particularly, the present invention relates to a crossbar fixing device for a folding wheelchair that can stably maintain the crossbar without swinging when the wheelchair is used by stably engaging the frame of the crossbar with the upper frame of the folding wheelchair. .

  A folding wheelchair is folded and stored when not in use, and a crossbar is installed at the center of the wheelchair so that it can be expanded and used quickly when in use. The crossbar of the wheelchair is preferably small when folded, and is easily engaged with the upper frame of the wheelchair when expanded so that it has a sense of stability. For this reason, with respect to the crossbar attached to the wheelchair, adjustment of the seat width of the wheelchair and a stable fixing method of the crossbar have been proposed.

  Claim 1 of Patent Document 1 states that “a foldable wheelchair is provided with a backrest, a seat, and two lateral frames, which support the driving wheels and the traveling wheels. Are connected to each other by two intersecting stays located in a plane transverse to the traveling direction, and the stays are coupled to each other so as to be rotatable at the intersection, and can move in a pinched manner around the rotation axis. The lower end of the stay is pivotally attached to the frame, and the upper end of the stay supports a seat tube positioned in the traveling direction, and each stay is above the intersection via a turning link. The seat tube is pivotally connected to an adjacent frame, and when the folded wheelchair is opened when the wheelchair is used, the seat tube is placed on a receiving member provided on the frame. To A folding wheelchair characterized in that the receiving member is formed as a locking member, and the seat tube is snapped into the locking member when the wheelchair is opened during use. Is disclosed.

  According to claim 1 of Patent Document 2, “it consists of a left and right side frame and a pair of front and rear X frames connecting the left and right side frames, and the left and right side frames are integrated from the upper edge collar and the front edge of the upper edge collar. A front edge collar, a rear edge collar, an intermediate collar, and a lower edge collar, which are bent downward, and an intermediate collar and a lower edge collar are passed between the front edge collar and the rear edge collar, Each X frame is composed of a pair of cross rods whose lower ends are pivotally attached to the lower edge rods and crossing each other at a cross point, and seat support rods supported on the upper ends of the cross rods. A claw for receiving a seat support rod of the X frame is provided inside the intermediate frame of the side frame, and a resin coating material is coated on the inner side of the intermediate frame and the claw, and the resin coating material is coated on the inner side of the intermediate frame. And a claw cover, a claw fitting recess is formed on the lower surface of the claw cover, and a locking claw is provided at the lower edge of each side wall of the claw fitting recess. The claw is locked by the locking claws on both sides of the fitting recess in a state where the claw fitting recess of the resin coating material is fitted to the claw inside the intermediate collar of the left and right side frames. Wheelchair frame "is disclosed.

  Claim 1 of Patent Document 3 states that “the left and right seat pipes that support the seat and are deployed in the vehicle width direction when the seat is used, and the pipes that receive the deployed left and right seat pipes. A foldable wheelchair comprising a right and left seat support pipe that supports the corresponding seat pipe with the pipe receiving member fixed and the pipe receiving member fixed, the receiving member being fixed, Provided in each of the left and right seat pipes, and when these pipes are received by the pipe receiving members, the seat pipes move in the axial direction with respect to the corresponding seat support pipes by coming into contact with the receiving members. Folding wheelchair characterized in that it is provided with stopper means for preventing the above. "

  In Patent Document 1, as described above, the seat tube snaps into the locking member fixed to the frame, and the frame tube and the seat tube are combined. Since the fixing of the frame of the cited document 1 is merely a snap-in of the seat tube to the locking member, there is a problem in that the sheet tube moves back and forth on the locking member if it stops suddenly. In Patent Document 2, the claw portion covered with the resin coating material attached to the frame supports the seat support rod of the cross bar, and has an effect of preventing wear due to friction between metals. In Patent Document 3, a receiving member is supported by a seat support pipe, and a stopper member is attached to the seat pipe.

A crossbar fixture that can open and close a crossbar of a foldable wheelchair as described above to fix the crossbar is disclosed. However, a fixing tool for fixing the crossbar to the side frame of the wheelchair and a fixing tool for the crossbar in which an engaging portion is attached to the frame of the crossbar so that the crossbar does not swing back and forth are not disclosed. . The emergence of a crossbar fixing tool that can be easily mounted, can be easily fixed, and can be seated with confidence.
Japanese Patent No. 2950850 Japanese Patent No. 3718549 JP-A-2005-28044

  In view of the above facts, when opening and using a folding wheelchair, the present inventors can easily engage the folded crossbar frame and the upper frame of the wheelchair to increase the seat width of the opened wheelchair. To provide a crossbar fixing device in which the seat does not swing back and forth due to the start, stop, etc. of the wheelchair.

  In order to solve the above-mentioned problems, as a result of intensive research, the engaging portion attached to the crossbar frame, the attaching portion attached to the upper frame of the wheelchair, and the crossbar frame were attached. The problem of the present invention has been solved as a fixture for a cross bar comprising a receiving portion that engages with an engaging portion and a fixing portion formed by the receiving portion.

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  Another feature of the present invention is a fixing device for a crossbar of a foldable wheelchair having a crossbar pivotally mounted on a lower frame of the wheelchair, and an attachment portion installed on the upper frame of the wheelchair. A fixing portion comprising a receiving portion having a semicircular recess, and an engaging portion having a fitting lid that engages with a shoulder of the semicircular recess of the receiving portion of the receiving portion of the crossbar frame. When the wheelchair is put into use by being mounted at the abutting position, the receiving portion of the fixing portion attached to the upper frame of the wheelchair is engaged with the engaging portion attached to the frame of the crossbar, and the recess of the receiving portion is engaged. A fitting tool for a crossbar of a foldable wheelchair characterized in that the fitting lid of the engaging portion is fitted on the shoulder of the wheelchair and the frame of the crossbar is fixed to the upper frame of the wheelchair with the wheelchair open. It is.

Another feature of the present invention is that a folding wheelchair equipped with the above-described crossbar fixture is fitted with a belt having a buckle or hook-and-loop fastener attached to the frame of the folding wheelchair, and the free end of the belt. This is a wheelchair folding mechanism characterized in that the crossbar can be easily closed and opened by raising and lowering.

Another feature of the present invention is a crossbar fixture for a folding wheelchair having a crossbar pivotally mounted on the lower frame of the wheelchair, and pivotally mounted on the lower frame of the wheelchair. A fixture for a crossbar of a folding wheelchair having an open crossbar, which receives a frame of the crossbar having a mounting portion to be attached to an upper frame of the wheelchair and a protrusion on a bottom surface of a semicircular recess And a fixing part formed by the part and an engaging part having a concave part engaging with the protrusion part of the receiving part attached to the frame of the cross bar, and the wheelchair is in use by opening the cross bar When the wheelchair is opened with the projection of the receiving portion provided on the fixed portion mounted on the upper frame of the wheelchair engaged with the recess of the engaging portion mounted on the frame of the crossbar, Fixing the arm to the upper frame of the wheelchair, and more formed fixed portion and the receiving portion having a recess in the mounting portion and the semi-circular shape clamped by the upper frame of the wheelchair, is clamped by the cross bar of the frame the A hole penetrating through the fixing portion of the crossbar fixing tool and the central portion of the engaging portion is formed by an engaging portion that engages with the receiving portion .

  A fixing device for a crossbar having a hole penetrating vertically in the center of the fixing portion and the engaging portion is attached to the frame of the crossbar, and a hole is formed in the frame at the same position as the hole drilled in the engaging portion. The bolt is passed from the upper part of the engaging part through the hole of the frame to the lower part of the fixing part, and fixed with a nut. Thus, the crossbar can be firmly fixed to the upper frame by fixing the frame and the fixing portion of the crossbar with the bolts. For a user who always uses the wheelchair without folding it, the wheelchair can be used in a stable state without rattling.

Another feature of the present invention is a fixing device for a crossbar of a foldable wheelchair having a crossbar pivotally mounted on a lower frame of the wheelchair, and an attachment portion installed on the upper frame of the wheelchair. Fixing of a fixing device for a cross bar comprising a fixing part comprising a receiving part having a semicircular recess and an engaging part having a fitting lid for engaging the shoulder of the semicircular concave part of the receiving part And a hole penetrating the central portion of the engaging portion and the engaging portion .

  A crossbar fixing tool having a hole penetrating vertically in the center of the fixing part and the engaging part is attached to the frame of the crossbar, and the hole is penetrated through the frame at the same position as the engaging part. The crossbar can be firmly fixed to the upper frame by passing the bolt from the upper part of the joint part to the lower part of the fixing part and fixing with a nut. For a user who always uses the wheelchair without folding it, the wheelchair can be used in a stable state without rattling.

  An attachment part of a fixed part consisting of an attachment part and a receiving part having a semicircular recess is attached to the upper frame of the wheelchair, and the semicircle of the receiving part is located at a position where the receiving part comes into contact with the frame of the crossbar By attaching the engaging portion that engages with the concave portion of the shape, the receiving portion and the engaging portion are engaged when the crossbar is opened, and the crossbar can be stably held in the open state. By attaching a protrusion at the center of the semicircular recess of the receiving portion and providing the engaging portion with a recess that engages with the protruding portion, the engagement between the receiving portion and the engaging portion becomes stronger. Have. Furthermore, a fitting lid that engages with the shoulder portion of the receiving portion can be attached to the outer edge of the engaging portion, so that the engaging portion can be more strongly engaged with the receiving portion.

  Further, when the free end of the belt having the buckle is pulled up, the cross bar is folded, the belt is tightened by the buckle, and the cross bar is held in a closed state. To open the crossbar, hold the free end of the belt and pull it to one side to release the buckle and open the crossbar. For belts with hook-and-loop fasteners attached, attach the belt to the crossbar frame, peel off the belt's free end and the hook-and-loop fasteners, and lift the free end of the belt with one hand. You can fold the wheelchair.

  The footless fixture of the present invention will be described in detail below with reference to the drawings, but the present invention is not limited to the following examples.

  FIG. 1 shows the shape from the side of a folding wheelchair with a crossbar. The wheelchair 10 has a caster 11 that can be rotated to the left and right at the front, and a main wheel 14 that is supported by the upper frame 12 and the lower frame 15 behind the caster 11. A backrest 17 is attached to the rear portion of the upper frame 12 so that a user can sit on the backrest. Under the seat portion 13, a cross bar 16 pivotally attached to the lower frame so as to connect the left and right upper frames 12 and the lower frame 15 is pivotally attached. The crossbar 16 is installed so that the wheelchair 10 can be easily folded when not in use or expanded when in use, but the crossbar frame 18 is provided with a seat 13 and maintains the strength of the wheelchair. To play an important role.

  FIG. 2 shows a fixing portion 20 including an attachment portion 21 and a receiving portion 22 having a semicircular recess 21 constituting one of the fixing devices 100 of the crossbar of the present invention. (2-1) of FIG. 2 is a top view of the receiving part 22 formed in the fixing part 20, and the attaching part 21 formed in the fixing part 20 is a part welded to the upper frame 15 of the wheelchair. The engaging portion 26 attached to the frame 18 of the crossbar engages with a semicircular concave portion 23 of the receiving portion 22 formed in the fixing portion 20. A protrusion 24 is attached to the center of the semicircular recess 23 of the receiving portion 22. As shown in (2-2) or (2-3) of FIG. 2, the protrusion 24 attached to the center of the semicircular recess 23 is screwed with a bolt 25 at the center of the receiving portion 22. The head of the bolt 25 protrudes to form a protrusion 24. The shape of the projecting portion 24 is not limited to the method of projecting the head of the bolt 25, and only the head portion may be welded to form the projecting portion 24. The shape of the projecting portion 24 provided on the receiving portion 22, The attachment method is not particularly limited as long as the engagement portion 27 is simply engaged and fixed to the receiving portion 22 and the shape and attachment method are not particularly limited.

  The material of the fixing part 20 composed of the attachment part 21 and the receiving part 22 is a structure in which one end is welded to the upper frame 12 of the wheelchair and the frame 18 of the crossbar is supported from below. used. Since the engaging portion 27 attached to the frame 18 of the crossbar is structured to be put on the receiving portion 22 of the fixing portion 20, a synthetic resin having high strength and weather resistance is used. The material of the fixing part 20 and the receiving part 22 is not limited to the above-described synthetic resin and may be made of metal as long as it has rigidity and durability capable of withstanding each load.

  FIG. 3 shows an engaging portion 27 attached to the crossbar frame 18 constituting one of the crossbar fixtures 100 of the present invention. (3-1) in FIG. 3 is a side view of the engaging portion 27 which is a component of the crossbar fixture 100, (3-2) in FIG. 3 is a top view of the engaging portion 27, and FIG. (3-3) is a bottom view of the engaging portion 27, and (3-4) in FIG. 3 is a perspective view from the side of the engaging portion 27. As shown in FIG. 3 (3-2), the shape of the engaging portion 27 is a semicircular cylindrical body having one cylindrical side surface opened, and is formed on both outer side surfaces of the cylindrical portion of the engaging portion 27. The shoulder portion 26 is attached, and the both sides of the receiving portion 22 of the fixing portion 20 attached to the upper frame 12 of the wheelchair are sandwiched between the shoulder portions 26 and fixed. On the outer surface of the engaging portion 27 attached to the frame 18 of the crossbar, a concave portion 23 that engages with the protruding portion 24 attached to the central portion of the receiving portion 22 was formed.

  FIG. 4 shows a state in which the receiving portion 22 of the fixing portion 20 attached to the upper frame 12 of the wheelchair and the engaging portion 27 attached to the frame 18 of the crossbar are engaged. When the crossbar of the wheelchair is opened, the contact recess 28 of the engaging portion 27 attached to the frame 18 of the crossbar and the protrusion 24 at the center of the receiving portion 22 attached to the upper frame 12 of the wheelchair are engaged. In addition, the shoulder portion 26 provided outside the engaging portion 27 sandwiches the receiving portion 22 to prevent the crossbar frame 18 from swinging back and forth during movement of the wheelchair.

  FIG. 5 shows another shape of the engaging portion 27 attached to the frame 18 of the crossbar. The receiving portion 22 of the fixing portion 20 attached to the upper frame 12 of the wheelchair that engages with the engaging portion 27 is also formed at the center of the semicircular concave portion 23 as shown in FIG. Although the shape is such that there is no protrusion, the protrusion 24 may be provided at the center of the semicircular recess 23 as in the case of the engagement portion 27 described above. The engaging portion 27 shown in (5-2) of FIG. 5 or (5-3) of FIG. 5 has a fitting lid 30 attached to the side surface of the engaging portion 27, and (5-4) of FIG. When engaged with the receiving portion 22 of the fixed portion 20 as shown in FIG. 2, the structure engages with the shoulder portion 30 of the receiving portion 22 of the fixed portion 20 so as to cover the shoulder portion 30. did. By fitting the shoulder portion 30 of the receiving portion 22 of the fixing portion 20 and engaging with the lid, the fitting lid 31 of the engaging portion 27 is fitted to the receiving portion 22 and the crossbar. This prevents the frame 18 from swinging back and forth and from side to side.

  FIG. 6 shows a crossbar frame in which two attachment portions 21 having receiving portions 22a and 22b of the fixing portion 20 are welded to the upper frame 12 of the wheelchair one by two and abutted against the receiving portions 22 of the fixing portion 20 thus welded. In the example shown in FIG. 18, two engaging portions 27a and 27b are attached to one side. Further, a buckle attachment portion 33 is attached to one side of the cross bar, the belt 32 attached to the other side of the cross bar is passed, and the cross bar 16 is folded when the free end 32a of the belt is grasped and pulled up. Even if the hand is released from the free end 32a, the belt is tightened and fixed while the buckle 33a is closed, and the cross bar 16 is held closed. When the cross bar 16 is opened, if the belt has the free end 32a and is pulled to one side, the buckle 33a is released and the cross bar 16 is opened.

  In FIG. 7, a belt 32 having a female or male hook-and-loop fastener 34 attached to the center and end of the belt 32 is attached to the frame 18 of the crossbar via a buckle 33 at one end. When the belt 32 is pulled up by peeling the free end of the belt fastener 34 from the hook-and-loop fastener 34, the crossbar frame 18 can be pulled easily, the wheelchair is folded, the belt 32 is pulled, and the free ends are stuck together. Shows a method of stably holding the wheelchair in a folded state.

  FIG. 8 shows an example in which a hole 35 through which a bolt is passed is formed in a fixture 100 of a crossbar of a folding wheelchair having a crossbar pivotally mounted on a lower frame of the wheelchair. A fixing portion 20 formed by an attachment portion 21 to be attached to an upper frame of a wheelchair, a receiving portion 22 to receive the frame of the crossbar having a semicircular recess, and the receiver to be attached to the frame of the crossbar A folding wheelchair cross characterized by having a hole 35 penetrating vertically in the center of the fixing portion 20 and the engaging portion 27 of the fixing member of the crossbar, which includes the engaging portion 27 engaged with the portion 22. A bar fixture 100 is shown.

  FIG. 9 shows an example in which a crossbar fixing tool 100 is attached to a folding wheelchair having a crossbar 16 pivotally attached to a lower frame 15 of the wheelchair. An attachment part 21 of a fixed part 20 comprising an attachment part 21 and a receiving part 22 with a hole formed in the upper and lower sides of the center of a semicircular recess is attached to the upper frame 12 of the wheelchair. 18 is engaged with an engagement portion 27 having a hole penetrating vertically in the central portion having a fitting lid 31 that engages with the shoulder of the semicircular recess of the receiving portion. A hole of the same diameter is also formed in the frame 18 of the crossbar so as to match the hole 35 in the center of the portion 27, and the bolt 36 is inserted so as to penetrate from the top of the engaging portion 27 to the bottom of the fixed portion 20. Then, the nut 37 (not shown) was firmly fixed from below.

  For those who use the wheelchair with the wheelchair open at all times, by fixing the crossbar frame firmly to the upper frame so that it does not move with bolts and nuts, the wheelchair can be used in a stable state without rattling. .

FIG. 1 is a side view of a wheelchair equipped with a crossbar. FIG. 2 is a top view, a side view, and a perspective view of a receiving portion constituting the crossbar fixture. FIG. 3 is a top view, a side view, and a perspective view of an engaging portion constituting the crossbar fixture. FIG. 4 is a perspective view in which the receiving portion and the engaging portion constituting the crossbar fixture are engaged. FIG. 5 is a perspective view of another shape of the receiving portion and the engaging portion constituting the crossbar fixture. FIG. 6 is a partial perspective view of a wheelchair equipped with a belt on which a receiving portion and an engaging portion constituting the crossbar fixture and a buckle for folding the crossbar are attached. FIG. 7 is a partial perspective view of a wheelchair equipped with an auxiliary belt to which a receiving part and an engaging part constituting the crossbar fixture and a hook-and-loop fastener for folding the crossbar are attached. FIG. 8 is a top view, a side view, and a perspective view of an engaging portion that constitutes a crossbar fixture having a hole penetrating vertically (through a bolt). FIG. 9 is a partial perspective view of a wheelchair equipped with a crossbar fixing tool having holes formed vertically.

Explanation of symbols

100: Crossbar fixture 10: Wheelchair 11: Caster 12: Upper frame 13: Seat 14: Main wheel 15: Lower frame 16: Crossbar 17: Backrest 18: Crossbar frame 19: Rear frame 20: Fixing portion 21: Attachment part 22: Receiving part 23: Recess 24: Protrusion 25: Bolt 26: Shoulder 27: Engaging part 28: Abutting part 29: Abutting recessed part 30: Shoulder part 31: Fit lid 32: Belt 33: Buckle attachment part 34: Hook fastener 35: (Pass the bolt) Hole 36: Bolt 37: Nut

Claims (5)

  A fixing device for a crossbar of a foldable wheelchair having a crossbar pivotally attached to a lower frame of the wheelchair and having a mounting portion to be attached to the upper frame of the wheelchair and a semicircular recess A wheelchair is mounted with an engaging part having a fixing part made of a part and an engaging part having a fitting lid that engages with a shoulder part of a semicircular recess of the receiving part at a position where the receiving part of the frame of the crossbar comes into contact When the wheelchair is in use, the receiving portion of the fixing portion attached to the upper frame of the wheelchair engages with the engaging portion attached to the frame of the crossbar, and the engaging portion engages with the shoulder portion of the recess of the receiving portion. A fitting device for a crossbar of a foldable wheelchair, wherein the fitting bar is fitted and the frame of the crossbar is fixed to the upper frame of the wheelchair with the wheelchair open. A folding wheelchair having a fixture of the crossbar according to 請 Motomeko 1, mounted buckle crossbar frame folding wheelchair, or clamped by the belt surface fasteners, raise and lower the free end of the belt The wheelchair folding mechanism is characterized in that the crossbar can be easily closed and opened by A foldable wheelchair crossbar fixture having a crossbar pivotally attached to a lower frame of a wheelchair, and attached to a bottom portion of a semicircular recess and an attachment portion to be attached to the upper frame of the wheelchair A fixing portion formed by a receiving portion for receiving the frame of the crossbar having a protruding portion, and an engaging portion having a concave portion for engaging with the protruding portion of the receiving portion attached to the frame of the crossbar. When the wheelchair is in use by opening the crossbar, the protrusion of the receiving portion provided on the fixing portion attached to the upper frame of the wheelchair and the recess of the engaging portion mounted on the frame of the crossbar are engaged. And fixing the crossbar frame to the upper frame of the wheelchair with the wheelchair open, and a fixing portion formed by an attachment portion to be attached to the upper frame of the wheelchair and a receiving portion having a semicircular recess , A hole penetrating the fixing portion of the crossbar fixture and the central portion of the engaging portion, which is formed of an engaging portion that engages with the receiving portion that is attached to the frame of the crossbar, is formed. It is that folding fixture of the cross bar of the wheelchair and. A fixing device for a crossbar of a foldable wheelchair having a crossbar pivotally attached to a lower frame of the wheelchair and having a mounting portion to be attached to the upper frame of the wheelchair and a semicircular recess A fixing part of the crossbar, and a central part of the engaging part. The fixing device for the cross bar of the folding wheelchair according to claim 1 , wherein a hole penetrating through the hole is formed. A wheelchair folding mechanism,
The fixing device for the crossbar of the wheelchair is a fixing portion formed by an attaching portion to be attached to the upper frame of the wheelchair and a receiving portion for receiving the frame of the crossbar having a protrusion on the bottom surface of the semicircular recess And an engaging portion having a recess that engages with the protruding portion of the receiving portion that is attached to the frame of the crossbar. When the crossbar is opened and the wheelchair is in use, it is attached to the upper frame of the wheelchair. The crossbar frame is fixed to the upper frame of the wheelchair with the projection of the receiving portion provided on the fixed portion provided and the recess of the engaging portion mounted on the frame of the crossbar engaged to open the wheelchair. ,
By attaching a belt with a buckle or hook-and-loop fastener attached to the frame of the crossbar of the folding wheelchair to the folding wheelchair having the crossbar fixing device, the free end of the belt is raised and lowered to A wheelchair folding mechanism, which can be easily closed and opened.

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