JP6063022B1 - Wheelchair and armrest structure - Google Patents

Abstract

Provided is a wheelchair that provides a more improved feeling of use. A wheelchair 10 has a back frame 14 and a seat frame 13, and is fixed to a pair of side frames 12 that pivotally support a pair of main wheels 11 and the side frames 12, respectively. A support frame 110 that extends in the vertical direction in front of the seating space S that accommodates the torso, an armrest 120 that extends in the front-rear direction and is slidably supported by the support frame 110 in the front-rear direction, and the support frame 110 And a lock member 130 that is fixed and locks the armrest 120 with respect to the support frame 110 in the first lock position or the second lock position. In the first lock position, the rear end of the armrest 120 is close to the back frame 14 so that the armrest 120 extends to the side of the seating space S. In the second lock position, the rear end of the armrest 120 is separated from the back frame 14 so as to open the side of the seating space S. [Selection] Figure 1

Description

  The present invention relates to a wheelchair and an armrest structure for the wheelchair.

  2. Description of the Related Art In recent years, a wheelchair in which a person is seated is mounted on a vehicle by a boarding / alighting device, and the vehicle is run after the wheelchair is fixed to the floor of the vehicle. In order to ensure the safety of a wheelchair seated person when the wheelchair is mounted on a car or when the car is running, a wheelchair seat belt device for restraining the body of the seated person is installed in the boarding / alighting device or the car.

  For example, the seatbelt device for a wheelchair of Patent Document 1 is pulled out to a first retractor (23) fixed to a lifter mechanism (22) on one side of the wheelchair (21) and the first retractor (23). The first seat belt (24) wound freely, the buckle member (25) fixed to the lifter mechanism (22), and the vehicle body panel (20a) on the first retractor (23) side fixed to the upper position. It mainly comprises a second retractor (26) and a second seat belt (27) wound around the second retractor (26) so as to be freely drawn out. The first seat belt (24) has a buckle (28), which is an engaging member, fixed to the front end portion thereof, and a slugging (29) that can be engaged with and disengaged from the buckle member (25) is located at a predetermined position. It is slidably attached. On the other hand, the second seat belt (27) has a tongue (30), which is a locking member that can be engaged with and disengaged from the buckle (28) of the first seat belt (24), fixed at the tip, The through anchor (31) is slidably supported. In order to mount the first seat belt (24) with the wheelchair seat belt device, first, the first seat belt (24) is moved upward from the first retractor (23) with the buckle (28) at the tip. While pulling out, grab the thru-routing (29), pass it under one armrest (21a), pull it out right above the seated person's (not shown) knee, and then the other armrest (21b) Pass under. Next, holding the tongue (30) with the left hand, the second seat belt (27) is pulled out from the second retractor (26) toward the front of the person, and the tongue (30) is placed in front of the buckle (28). To lock. As a result, the mounting operation in which the first seat belt (24) is routed in an inclined manner to one shoulder of the person is easily completed. In addition, the code | symbol of patent document 1 was shown in ().

Japanese Patent Laid-Open No. 2002-315991

  Various seat belt devices with improved seat belt engagement / disengagement work have been developed, such as a wheelchair seat belt device of Patent Document 1. However, in most wheelchair seat belt devices, one seat belt restrains the seated person's torso from the shoulder, and the other seat belt passes horizontally underneath the seated person's abdomen. It is common in the point which restrains. In general, when an armrest is provided in a wheelchair, the armrest extends forward from the side of the torso so that a seated person's elbow can be placed. Therefore, when a caregiver or a seated person operates the seat belt, the armrest located on the side of the torso of the seated person may interfere with the attaching / detaching work of the seat belt, and the engaging / disengaging work may be difficult. . Alternatively, the seat belt may interfere with the armrest, making it difficult to attach or detach the seat belt, or the seated person cannot be restrained safely with the seat belt. That is, the conventional wheelchair is not limited to the seat belt attaching / detaching operation, and the armrest obstructs the operation on the side of the torso of the seated person.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wheelchair that provides a more improved feeling of use and an armrest structure that is attached to the wheelchair and can be easily operated. It is in.

The wheelchair according to claim 1 has a seat frame and a back frame, and a pair of side frames that pivotally support a pair of main wheels;
A support frame that is fixed to each of the side frames and extends in a vertical direction in front of a seating space that houses a torso of a seated person;
An armrest extending in the front-rear direction and supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame at a first lock position or a second lock position;
The first lock position and the second lock position can be alternately switched,
In the first lock position, the rear end of the armrest is the back frame so that the armrest extends to the side of the seating space so that the elbow can be placed on the armrest with the arm lowered from the torso. In the second locked position, the rear end of the armrest is configured to open the side of the seating space so that the seated person can freely move his arms and elbows outward. It is separated from the frame.

The wheelchair according to claim 3 is the wheelchair according to claim 1 or 2 , characterized in that the support frame is located at least in front of the middle of the seat frame.

The wheelchair according to claim 4 is the wheelchair according to any one of claims 1 to 3 , wherein the armrest can be locked in stages between the first lock position and the second lock position. Features.

The wheelchair according to claim 2 has a pair of side frames that have a seat frame and a back frame and pivotally support a pair of main wheels;
A support frame that is fixed to each of the side frames and extends in a vertical direction in front of a seating space that houses a torso of a seated person;
An armrest extending in the front-rear direction and supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame at a first lock position or a second lock position;
In the first lock position, the rear end of the armrest is close to the back frame so that the armrest extends to the side of the seating space, and in the second lock position, the side of the seating space is opened. The rear end of the armrest is separated from the back frame,
The support frame is fixed to the side frame and extends vertically. The support shaft is connected to the support shaft and guides the slide of the armrest. The lock member is fixed. And comprising
The armrest includes a hollow portion that allows the guide portion to be relatively slidable in the front-rear direction, and two or more lock holes that are positioned along the longitudinal direction of the armrest,
The lock member includes a lock pin that can be fitted into the lock hole, a biasing member that biases the lock pin toward the lock hole, and an operation knob that is coupled to the lock pin and protrudes outward of the armrest. With
When the operation knob is pulled, the lock pin is detached from the lock hole and the lock is released.

The wheelchair according to claim 5 is the wheelchair according to claim 2 , wherein the operation pin is pulled to the side opposite to the urging direction and rotated to maintain the state where the lock pin is detached from the lock hole. It is possible.

The wheelchair according to claim 6 is the wheelchair according to claim 2 or 5, wherein the support shaft portion is formed with a plurality of height adjustment holes for fixing to the side frame. And

The armrest structure according to claim 7 is an armrest structure configured to be fixed to a side frame of a wheelchair,
A support frame extending vertically in the wheelchair;
An armrest that extends in the front-rear direction of the wheelchair and is supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame,
The support frame is fixed to the side frame and extends vertically. The support shaft is connected to the support shaft and guides the slide of the armrest. The lock member is fixed. And comprising
The armrest includes a hollow portion in which the guide portion is inserted so as to be relatively slidable in the front-rear direction, and two or more lock holes positioned along the longitudinal direction of the armrest,
The lock member includes a lock pin that fits into the lock hole, a biasing member that biases the lock pin toward the lock hole, an operation knob that is coupled to the lock pin and protrudes outward of the armrest, With
When the operation knob is pulled and rotated in the direction opposite to the urging direction, the state where the lock pin is detached from the lock hole can be maintained.

  According to one aspect of the present invention, the support frame is positioned in front of the seating space for accommodating the seated person's torso, and the armrest is slidable in the front-rear direction with respect to the support frame. A first lock position in which the rear end of the armrest is close to the back frame so that the armrest extends to the side of the seating space, and a second lock in which the rear end of the armrest is separated from the back frame so as to open the side of the seating space. The armrest can be locked selectively depending on the position. That is, when the armrest is in the first lock position, the armrest is disposed beside the seating space, so that the seated person can sit on the wheelchair by placing an elbow on the armrest and relaxing. On the other hand, when the armrest is in the second locked position, the armrest slides forward and the side of the seating space is open, so that the seated person can freely move the arms and elbows outward, The caregiver can freely work on the side of the torso of the seated person. For example, by locking the armrest at the second lock position, it becomes easy to detach the seat belt while the seated person is seated on the wheelchair. That is, a wheelchair user (a seated person and an assistant) can use the wheelchair more comfortably by selecting the position of the armrest from the first lock position and the second lock position according to the use situation of the wheelchair. Is possible.

  According to the further form of this invention, the space for work can be ensured in the side of seating space because the support frame is located at least ahead rather than the middle of a seat part frame.

  According to a further aspect of the invention, the armrest can be locked in stages between the first locked position and the second locked position. Thereby, the position of the armrest can be adjusted back and forth according to the comfort of the seated person.

  According to the further form of the present invention, by operating the operation knob, it is possible to control the engagement / disengagement of the lock pin and the lock hole and easily change the lock position of the armrest. Furthermore, since the operation of pulling the operation knob is necessary for unlocking, it is possible to prevent a malfunction that is unexpectedly unlocked.

  According to a further aspect of the present invention, when the operation knob is pulled and rotated in the direction opposite to the urging direction, the state in which the lock pin is detached from the lock hole can be maintained, so that the hand is released from the operation knob. The armrest can be slid with respect to the support frame while keeping it. That is, it becomes easy to change the armrest lock position.

1 is a schematic side view of a wheelchair according to an embodiment of the present invention. Schematic which shows the usage example of the wheelchair (1st lock position) of this embodiment. Schematic which shows the usage example of the wheelchair (2nd lock position) of this embodiment. It is the partial expanded side view of the wheelchair of FIG. 1, Comprising: (a) The form in which the armrest was locked in the 1st lock position, and (b) The form in which the armrest was locked in the 2nd lock position. (A) AA sectional drawing of FIG. 4, (b) A'-A 'sectional drawing. (A) BB sectional drawing of FIG. 5, (b) B'-B 'sectional drawing. CC sectional drawing of FIG. It is a schematic sectional drawing of the locking mechanism of the wheelchair of FIG. 1, Comprising: (a) A locked state, (b) An unlocked state, (c) An unlocking maintenance state is shown. (A) DD sectional drawing of FIG. 8, (b) D'-D 'sectional drawing. Sectional drawing of the armrest structure of the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the shape of each figure referred in the following description is a conceptual diagram or a schematic diagram for explaining a suitable shape dimension, and a dimension ratio etc. do not necessarily correspond with an actual dimension ratio. That is, the present invention is not limited to the dimensional ratio in the drawings.

  FIG. 1 is a side view of a wheelchair 10 according to the present embodiment. The wheelchair 10 is configured by connecting a plurality of metal pipe-shaped frames. The wheelchair 10 includes a pair of side frames 12 connected to each other, and main wheels 11 are pivotally supported on the outer sides of the side frames 12. A pair of front wheels are provided in front of the main wheel 11. The side frame 12 includes a seat frame 13 on which a cloth-shaped seat sheet is stretched, a back frame 14 on which a cloth-shaped backrest sheet extending upward from the seat frame 13 is stretched, and a seat portion. A curved frame 15 extending in an arc shape between the tip of the frame 13 and the central part of the back frame 14 is provided. A side guard 15a is attached to the curved frame 15, and the main wheel 11 is separated from the seated person by the side guard 15a.

  Each side frame 11 is provided with an armrest structure 100. The armrest structure 100 includes a support frame 110, a longitudinal armrest 120 supported by the support frame 110, and a lock member 130 that locks the armrest 120 at a predetermined position. The support frame 110 that supports the armrest 120 is fixed to the curved frame 15 of the side frame 11.

  As shown in FIG. 1, in this embodiment, a space for accommodating a seated person's torso, that is, a range within a predetermined distance from the back frame 14 and above the main wheel 11 (or the side guard 15 a) The working space is defined as the sitting space S. The side of the seating space S can be an effective work space for attaching and detaching a seat belt. Considering the variety of seated person's physiques, the seating space S can generally fall within the range between the intermediate position in the front-rear direction of the seat frame 13 and the back frame 14. The support frame 110 is fixed to each side frame 12 (curved frame 15) so as to extend in the vertical direction in front of the seating space S. That is, the support frame 110 is not located on the side of the seating space S. More specifically, the support frame 110 is located in front of an intermediate position in the front-rear direction of the seat frame 13. In this embodiment, the support frame 110 (center axis) is fixed at a position of about 235 mm from the rear end of the seat frame 13 in the horizontal direction. Moreover, although it is preferable that the support frame 110 is provided in the position of about 200 mm-300 mm from the rear end of the seat part frame 13, depending on the object of a wheelchair user, the position can be defined arbitrarily. Is possible.

  And the wheelchair 10 of this embodiment assumes that it is mounted in vehicles, such as a motor vehicle, The armrest 120 slides ahead from a 1st lock position (solid line of FIG. 1) with respect to the support frame 110, It is possible to lock at the second lock position (virtual line in FIG. 1). That is, in the first lock position, the rear end of the armrest 120 is close to the back frame 14 (or the rear end of the seat frame 13) so that the armrest 120 extends to the side of the seating space S. On the other hand, in the second lock position, the rear end of the armrest 120 is separated from the back frame 14 so as to open the side of the seating space S. In other words, the state in which the side of the seating space S is open means that the gap between the rear end of the armrest 120 and the back frame 14 is such that work can be performed on the side of the seated person and / or the assistant. It is in an expanded state.

  FIG. 2 shows an example of use of the wheelchair 10 in the first lock position. As shown in FIG. 2, the armrest 120 extends to the side of the seating space S and is arranged beside the seated person's trunk (or elbow, arm). In this first lock position, the seated person can sit on the wheelchair 10 in a relaxed posture with his elbows placed on the armrest 120 with his arms gently lowered from the torso. In the present embodiment, the horizontal distance d1 between the rear end of the seat frame 13 and the rear end of the armrest 120 in the first lock position (that is, a substantial gap between the back frame 14 and the armrest 120) is not limited. In consideration of comfortable placement of the elbow, it is preferably 40 mm or less. The length of the armrest 120 is about 300 mm. However, since the side of the seating space S of the seated person is closed by the armrest 120 in the first lock position, the seated person cannot freely move the arm sideways. That is, when the wheelchair 10 with a seated person is mounted on a vehicle or when the seat belt is fastened while being fixed to the vehicle, the armrest 120 becomes an obstacle and is likely to be a relatively difficult task. . This can be said both when the seated person operates the seat belt and when the assistant operates the seat belt. Or there exists a possibility that the armrest 120 may interfere with a seatbelt and a seatbelt cannot be mounted | worn safely. On the other hand, in the wheelchair 10 of this invention, the said malfunction can be coped with by switching the position of the armrest 120 from a 1st lock position to a 2nd lock position.

  FIG. 3 shows an example of use of the wheelchair 10 in the second locked position. As shown in FIG. 3, the armrest 120 slides forward from the first lock position, and is locked at a position where the side of the seating space S above the main wheel 11 and the side guard 15a is opened. In other words, neither the support frame 110 nor the armrest 120 is located on the side of the seating space S. In the present embodiment, the horizontal distance d2 between the rear end of the seat frame 13 and the rear end of the armrest 120 in the second locked position is not limited, but is about 140 mm, and considering the size of a comfortable working space on the side, It is preferable that it is 100 mm or more. That is, when the armrest 120 is locked at the second lock position, the seated person can freely move the arms and elbows outward, and the assistant can work freely on the side of the torso of the seated person. It can be performed. Thereby, as shown in FIG. 3, the seat belt can be operated by freely using the side space of the seating space S while the seated person is seated on the wheelchair 10. However, in the second locked position, the armrest 120 does not extend beside the seated person's torso, so the seated person cannot place the elbow on the armrest 120 with the arm lowered, and takes a relaxed posture. It is not easy. That is, when the seated person wants to take a relaxed posture, the operation of switching the position of the armrest 120 from the second lock position to the first lock position can be performed.

  That is, in the armrest structure 100 of the wheelchair 10 according to the present embodiment, a user (a seated person and a caregiver) of the wheelchair 10 sets the first lock position in FIG. 2 and the second lock position in FIG. It is possible to switch alternately. Hereinafter, the armrest structure 100 of the present embodiment will be described in detail with reference to FIGS. 4 to 9.

  4 is a partially enlarged side view of the armrest structure 100 of the wheelchair 10 of FIG. 1, FIG. 4A shows a form in which the armrest 120 is locked in the first lock position, and FIG. The form which the armrest 120 was locked in the 2nd lock position is shown. 5 to 7 are cross-sectional views thereof.

  The armrest structure 100 includes a support frame 110 extending in the vertical direction of the wheelchair 10, a hollow armrest 120 extending in the front-rear direction of the wheelchair 10 and supported by the support frame 110 so as to be slidable in the front-rear direction, and the support And a lock member 130 that is fixed to the frame 110 and locks the armrest 120 with respect to the support frame 110.

  The support frame 110 is formed in a T shape in a side view as a whole. The support frame 110 is fixed to the side frame 11 (curved frame 15) and extends vertically, a guide shaft 112 extending in the front-rear direction at the upper end of the support shaft 111, and the guide portion 112. And a fixing portion 113 formed so as to penetrate substantially the center. The guide portion 112 guides the sliding (sliding) of the armrest 120 in the front-rear direction. As shown in FIGS. 5 and 6, the support shaft portion 111 formed in a hollow pipe shape and the guide portion 112 formed in a plate shape are welded to be integrally formed. A fixing portion 113 to which the lock member 130 is fixed is formed in the approximate center of the guide portion 112. As shown in FIG. 5, the fixing portion 113 is a bolt hole that penetrates the guide portion 112, and is configured to be capable of screwing the lock member 130. Further, a flange portion 114 is formed at the upper end of the guide portion 112 so as to extend to both sides (see FIG. 7). The armrest 120 is placed on the flange portion 114.

  As shown in FIG. 7, the support shaft portion 111 has a plurality of height adjustment holes 115 formed along the axial direction thereof. One of the plurality of height adjustment holes 115 is selected, and the support shaft portion 111 is fixed to the side frame 11 with bolts through the height adjustment holes 115. That is, the height of the armrest 120 can be changed by the height adjustment hole 115. Further, as shown in FIG. 7, a tension pin 117 is inserted into a concave portion formed on the side surface of the flange portion 114 of the guide portion 112. The tension pin 117 includes a pin 117a that comes into contact with the inner wall of the armrest 120, and a spring 117b that biases the armrest 120 and the support frame 110 away from each other. That is, rattling between the armrest 120 and the support frame 110 is suppressed by the tension pin 117.

  The armrest 120 is a hollow body extending in the longitudinal direction, and the guide portion 112 is slidably inserted along the longitudinal direction. The hollow part 121 of the armrest 120 has a T-shaped cross-sectional shape with the lower part opened in a front view of FIG. In the hollow portion 121, an upper end portion (guide portion 112, flange portion 114) having a T-shaped support frame 110 is disposed. That is, the flange portion 112 is engaged with the inner wall of the armrest 120 so that the armrest 120 is supported so as not to be detached from the support frame 110.

  More specifically, the top wall of the armrest 120 has a placement surface for placing a seated person's elbow. Two lock holes 123 are formed in one side wall of the armrest 120 (arranged outside the wheelchair 10). The lock hole 123 in front of the wheelchair 10 (left side in FIG. 5) is a first lock hole 123a for the first lock position. On the other hand, the lock hole 123 behind the wheelchair 10 (right side in FIG. 5) is the second lock hole 123b for the second lock position. Further, a long hole 125 extending along the longitudinal direction is formed in the other side wall (arranged inside the wheelchair 10). The shaft portion 133 of the lock member 130 is inserted into the long hole 125, and the lock member 130 can be slid relative to the long hole 125. Further, as shown in FIG. 6, an opening 127 extending in the longitudinal direction is formed in the bottom wall of the armrest 120. The support shaft portion 111 of the support frame 110 is inserted into the opening 127, and the support shaft portion 111 can be relatively slid within the opening 127. That is, the armrest 120 is configured to be slidable along the front-rear direction (longitudinal direction) with respect to the support frame 110 and the lock member 130 fixed thereto. Then, the guide portion 112 relatively moves in the armrest 120, and the lock pin 132 of the lock member 130 is inserted into the lock holes 123a and 121b, so that the armrest 120 is in the first lock position or the second position relative to the support frame 110. 2 selectively locked in the locked position.

  As shown in FIG. 8, the lock member 130 includes a hollow bolt-shaped main body 131, a lock pin 132 that can be fitted into the lock hole 123, and a spring 136 as an urging member that urges the lock pin 132 toward the lock hole. And an operation knob 134 that protrudes outward from the armrest 120 via a shaft 133 connected to the lock pin 132. The lock member 130 functions as a so-called “rotary lock”.

  The main body 131 is formed in a bolt shape including a head portion and a shaft portion. The lock member 130 is fixed to the support frame 110 by screwing the shaft portion on which the thread 131 of the main body 131 is formed to the fixing portion 113 of the support frame 110. The main body 131 defines a through hole in the axial direction so that the lock pin 132, the shaft portion 133, and the spring 136 are inserted therein. Although most of the through holes have a uniform diameter, the diameter is reduced in the vicinity of the base end. That is, a step is formed on the base end side (operation knob 134 side) of the through hole.

  The lock pin 132 and the shaft portion 133 are fixed to each other, and the diameter of the lock pin 132 is larger than the diameter of the shaft portion 133. Then, the spring 136 is extrapolated to the shaft portion 133 and disposed between the base end surface of the lock pin 132 and the step in the main body 131. The spring 136 biases the lock pin 132 toward the lock hole 123 side.

  The shaft portion 133 is accommodated in the through hole of the main body 131 at the tip, and is disposed so as to penetrate the long hole 125 of the armrest 120 in the vicinity of the base end. A bulging portion 135 bulging in an oval shape or a rectangular shape is formed at the base end of the shaft portion 133. The long shaft portion of the bulging portion 135 is formed to be larger than the short width of the long hole 125 (see FIG. 8B), and the short shaft portion of the bulging portion 135 is formed to be less than the short width of the long hole 125. (See FIG. 8A). In the present embodiment, the short shaft portion of the bulging portion 135 and the diameter of the shaft portion 133 are equal. That is, the bulging portion 135 has a cross section expanded only in the major axis direction. Only when the long axis portion of the bulging portion 135 substantially matches the longitudinal direction of the long hole 125, the bulging portion 135 can enter the long hole 125. In other words, when the long axis portion of the bulging portion 135 and the long axis of the long hole 125 intersect, the bulging portion 135 engages with the periphery of the long hole 125.

  A disc-shaped operation knob 134 projects integrally at the base end of the shaft portion 133 (the bulging portion 135). The operation knob 134 has a shape that is easy for a wheelchair user to pick, and is used for a manual lock operation. The operation knob 134 can be pulled with respect to the main body 131 together with the lock pin 132 and the shaft portion 133 and can be rotated while being pulled. A line groove 134 a is carved on the surface of the operation knob 134. That is, the wheelchair user can grasp the rotation angle of the operation knob 134 according to the direction (vertical or horizontal) of the line groove 134a.

  FIG. 8A shows a form in which the armrest 120 is locked (fixed) to the support frame 110 by the lock member 130. As shown in FIG. 8A, the shaft 133 moves forward until the back surface of the operation knob 134 contacts the side surface of the armrest 120, and the lock pin 132 is fitted in the lock hole 123. The lock pin 132 is maintained in the lock hole 123 by the elastic restoring force of the spring 136. At this time, the long axis portion of the bulging portion 135 substantially matches the longitudinal direction of the long hole 125, and the linear groove 134a extends in the vertical direction. That is, the vertical direction of the line width 134a indicates the locked state.

  FIG. 8B shows a form in which the armrest 120 is unlocked from the support frame 110 by the lock member 130 and can slide relative to each other. As shown in FIG. 8B, the shaft portion 133 is retracted so that the operation knob 134 is separated from the side surface of the armrest 120, and the lock pin 132 is pulled out from the lock hole 123. At this time, the spring 136 is further contracted, and a strong elastic force is generated. Then, the operation knob 134 is rotated 90 degrees, and the bulging portion 135 is engaged with the edge of the long hole 125 in the (up and down) width direction. That is, when the operation knob 134 is pulled and rotated in the opposite direction to the urging direction from the locked state, the bulging portion 135 is engaged with the edge of the long hole 125, and the lock pin 132 is detached from the lock hole 123. Is maintained. At this time, the long shaft portion of the bulging portion 135 is orthogonal to the longitudinal direction of the long hole 125, and the linear groove 134a extends in the horizontal direction. That is, the horizontal direction of the line width 134a indicates the unlocked state. In the unlocked state of FIG. 8B, the armrest 120 can be slid with respect to the support frame 110.

  The effect of the wheelchair 10 and the armrest structure 100 of this embodiment is demonstrated.

  According to the wheelchair 10 of the present embodiment, the support frame 110 is positioned in front of the seating space S in which the seated person's torso is accommodated, and the armrest 120 is slidable in the front-rear direction with respect to the support frame 110. . The rear end of the armrest 120 is close to the back frame 14 so that the armrest 120 extends to the side of the seating space S, and the rear end of the armrest 120 is open to the side of the seating space S. The armrest 120 can be selectively locked at the second locking position separated from the arm 14. That is, when the armrest 120 is in the first lock position, the armrest 120 is disposed beside the seating space S, so that the seated person can sit on the wheelchair 10 with his elbows placed on the armrest 120 and relaxed ( (See FIG. 2). On the other hand, when the armrest 120 is in the second locked position, the armrest 120 slides forward and the side of the seating space S is opened, so that the seated person can freely move the arm and elbow outward. In addition, the assistant can freely work on the side of the torso of the seated person (see FIG. 3). That is, by locking the armrest 120 at the second lock position, the seat belt can be easily detached by the seated person or the assistant while the seated person is seated on the wheelchair 10. That is, the user of the wheelchair 10 (a seated person and an assistant) selects the position of the armrest 120 as the first lock position and the second lock position according to the use situation of the wheelchair 10, thereby making the wheelchair 10 more comfortable. It is possible to use it. In addition, although this embodiment demonstrated the point which the removal | desorption operation | work of a seatbelt becomes easy concretely at the time of vehicle mounting, this wheelchair 10 contributes to the improvement of utilization comfort also in utilization situations other than vehicle mounting. For example, when the assistant holds the occupant from behind, the side of the seating space is open, so that both arms of the assistant can be turned to the torso of the occupant without being interrupted by the armrest 120. Is possible. In other words, the wheelchair of the present invention is not limited to in-vehicle use.

  According to the wheelchair 10 and the armrest structure 100 of the present embodiment, by operating the operation knob 134, it is possible to control engagement / disengagement of the lock pin 132 and the lock hole 123 and easily change the lock position of the armrest 120. It is. Furthermore, since the operation of pulling the operation knob 134 is necessary for unlocking, it is possible to prevent a malfunction that is unexpectedly unlocked. Further, when the operation knob 134 is pulled and rotated in the direction opposite to the urging direction, the state in which the lock pin 132 is detached from the lock hole 123 can be maintained. That is, the armrest 120 can be slid with respect to the support frame 110 while releasing the hand from the operation knob 134. Therefore, the operation for changing the lock position of the armrest 120 is facilitated.

  Therefore, the wheelchair 10 (and the armrest structure 100) of the present embodiment facilitates work on the side of the seating space S with a simple operation and provides a more improved usability.

[Modification]
The present invention is not limited to the above embodiment, and various embodiments and modifications can be taken. Hereinafter, modifications of the present invention will be described. In addition, in each embodiment, the component which the last two digits have in common among the components shown by three digits has the same or similar characteristics unless otherwise specified, and a part of the description is omitted.

(1) In the wheelchair 10 of the present embodiment, the armrest 120 can be locked at two positions of the first lock position and the second lock position, but is locked in stages between the first lock position and the second lock position. It may be possible. For example, in the armrest structure 200 of FIG. 10, two lock holes 223c and 223d are further provided between the first lock hole 223a and the second lock hole 223b. Thereby, the wheelchair user can adjust the position of the armrest 220 with respect to the support frame 210 in a stepwise manner.

(2) In the wheelchair 10 of the present embodiment, the armrest structure 100 is attached to the curved frame 15 that is a part of the side frame 12, but the present invention is not limited to this. That is, the side guard and the curved frame may be omitted, and the support frame may be fixed to or integrated with an arbitrary frame (for example, a seat frame) of the side frame.

  The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wheelchair 11 Main wheel 12 Side frame 13 Seat frame 14 Back frame 15 Curved frame 15a Side guard 100 Armrest structure 110 Support frame 111 Support shaft part 112 Guide part 113 Fixing part 114 Flange part 115 Height adjustment hole 117 Tension pin 120 Armrest 121 Hollow part 123 Lock hole 123a First lock hole 123b Second lock hole 125 Long hole 127 Opening 130 Lock member 131 Main body 132 Lock pin 133 Shaft part 134 Operation knob 134a Line groove 135 Swelling part 136 Spring S Seating space

Claims (7)

A pair of side frames having a seat frame and a back frame and pivotally supporting a pair of main wheels;
A support frame that is fixed to each of the side frames and extends in a vertical direction in front of a seating space that houses a torso of a seated person;
An armrest extending in the front-rear direction and supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame at a first lock position or a second lock position;
The first lock position and the second lock position can be alternately switched, and in the first lock position, the armrest can be placed so that the occupant can place the elbow on the armrest with the arm lowered from the torso. So that the rear end of the armrest is close to the back frame so that the seating space extends to the side of the seating space, and in the second locked position, the seated person can freely move the arm or elbow outward. The wheelchair is characterized in that a rear end of the armrest is separated from the back frame so as to open a side of the seating space. A pair of side frames having a seat frame and a back frame and pivotally supporting a pair of main wheels;
A support frame that is fixed to each of the side frames and extends in a vertical direction in front of a seating space that houses a torso of a seated person;
An armrest extending in the front-rear direction and supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame at a first lock position or a second lock position;
In the first lock position, the rear end of the armrest is close to the back frame so that the armrest extends to the side of the seating space, and in the second lock position, the side of the seating space is opened. The rear end of the armrest is separated from the back frame,
The support frame is fixed to the side frame and extends vertically. The support shaft is connected to the support shaft and guides the slide of the armrest. The lock member is fixed. And comprising
The armrest includes a hollow portion that allows the guide portion to be relatively slidable in the front-rear direction, and two or more lock holes that are positioned along the longitudinal direction of the armrest,
The lock member includes a lock pin that can be fitted into the lock hole, a biasing member that biases the lock pin toward the lock hole, and an operation knob that is coupled to the lock pin and protrudes outward of the armrest. With
When the operation knob is pulled, the lock pin is detached from the lock hole and unlocked. The wheelchair according to claim 1 or 2 , wherein the support frame is located at least in front of the middle of the seat frame. The wheelchair according to any one of claims 1 to 3, wherein the armrest is lockable in a stepwise manner between a first lock position and a second lock position. 3. The wheelchair according to claim 2 , wherein the lock pin is disengaged from the lock hole by pulling and rotating the operation knob in a direction opposite to the urging direction. 4. The wheelchair according to claim 2 or 5, wherein a plurality of height adjustment holes for fixing to the side frame are formed in the support shaft portion. An armrest structure configured to be fixed to a side frame of a wheelchair,
A support frame extending vertically in the wheelchair;
An armrest that extends in the front-rear direction of the wheelchair and is supported by the support frame so as to be slidable in the front-rear direction;
A locking member fixed to the support frame and locking the armrest with respect to the support frame,
The support frame is fixed to the side frame and extends vertically. The support shaft is connected to the support shaft and guides the slide of the armrest. The lock member is fixed. And comprising
The armrest includes a hollow portion in which the guide portion is inserted so as to be relatively slidable in the front-rear direction, and two or more lock holes positioned along the longitudinal direction of the armrest,
The lock member includes a lock pin that fits into the lock hole, a biasing member that biases the lock pin toward the lock hole, an operation knob that is coupled to the lock pin and protrudes outward of the armrest, With
An armrest structure characterized in that a state in which the lock pin is detached from the lock hole can be maintained by the operation knob being pulled and rotated in the direction opposite to the urging direction.