JP2007082936A - Stretcher also serving as wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change the mode of a stretcher/wheelchair from a stretcher mode to a wheelchair mode via a tilted state, or on the contrary, from the wheelchair mode to the stretcher mode. <P>SOLUTION: A backrest frame 3 is supported to a base frame 1 in such a way as rotatably around a shaft 21 and supported to the rear side of a main frame 2 by a second fixing means 22 in such a way as rotatable around a shaft 23. A seat frame 4 is rotatably supported to the front side of the main frame 2. The rear part of the seat frame 4 and the lower end of the backrest frame 3 are connected to each other in such a way as slidable forward/backward and rotatable to each other, and their positional relation can be fixed at an arbitrary position. On the other hand, a leg-rest frame 5 is rotatably supported to the front end of the seat frame 4 to be interlocked with the lower end of the backrest frame 3, and the seat frame 4 is interlocked with the standing-up motion of the backrest frame 3 to be tilted. Then, the leg-rest frame is folded downward so that the mode is changed to the wheelchair mode in the tilted state, or the mode is changed to the stretcher mode from the wheelchair mode in the tilted state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stretcher / wheelchair that can be changed from a stretcher (bed) to a wheelchair or vice versa. More specifically, the present invention relates to a wheelchair for both a stretcher and a wheelchair including a tilting state in which the backrest and the seating surface are tilted so that the back side sinks in the form of a wheelchair in addition to changing the form from a stretcher to a wheelchair or vice versa.

  As shown in FIG. 14, a conventional stretcher-use wheelchair has a back frame 210 that supports the back 221, a seat frame 220 that supports the seat 222, and a legrest frame 230 that supports the legs 223 when it takes the form of a wheelchair. Are provided independently of each other, and are configured so as to be changeable in form by being connected to each other by rotating shafts 211 and 212. That is, the lower end of the back frame 210 is connected to the rear end of the seat frame 220, and the upper end of the legrest frame 230 is connected to the front end of the seat frame 220 so as to be rotatable with respect to each other by a single shaft 211, 212. A wheelchair is formed by bending the back frame 210 and the legrest frame 230 in conjunction with the rotation shafts 211 and 212 at the rear end and the front end while maintaining a horizontal state. To change to the stretcher state. Therefore, when the back frame 210 is raised about the rotation axis 211 from the stretcher state of FIG. 14, the legrest frame 230 interlocked with the back frame 210 rotates downward about the rotation axis 212 and bends. It becomes a wheelchair state. At this time, the seat remains horizontal.

  Here, in order to stabilize the hold state of the patient to be seated (including a nurse requiring care and a physically handicapped person), the seat 222 and the back 221 are slightly tilted backward to support the body with the seat 222 and the back 221. The mode can be changed to 16 tilt states. In this tilted state, it is possible to sit deeper while leaving weight on the back 221, so that it is possible to sit in a relaxed and easy posture, and the seated patient may take a forward leaning posture against its will. It is difficult to prevent accidents such as falling from a chair. This chair tilt mechanism is such that each frame 210, 220, 230 is supported by a carriage 203 via a four-joint rotation chain mechanism 204, and the movement / deformation of the four-joint rotation chain is made possible by the telescopic mechanism 205. The entire frame bent into a chair shape is tilted to the rear side as it is.

International Publication WO 2004/021953 JP2001-238911

  However, the conventional wheelchair / stretcher wheelchair has to go through the wheelchair state shown in FIG. 15 to move from the stretcher state shown in FIG. 14 to the tilt state shown in FIG. In addition, it has a structure that must pass through a wheelchair. For this reason, when converting from a stretcher state where the body is maintained in a substantially horizontal state to a wheelchair state, the upper body of the patient is awakened by being pushed by the backrest, and at the same time, the support of the lower leg from the knee is lowered. For this reason, there is a concern that it may slide forward on the seat and cause fear of sliding down. The same applies when changing from a wheelchair state to a stretcher state. If you take a posture that suddenly scoops up your feet while sitting down on the chair and falls back, it will apply force to your abdominal muscles and fall backwards. There is a risk of anxiety. Therefore, it is necessary to perform the shape change operation for deforming the frame structure with a sufficient care such as restraining the patient and still gently. Even so, it is difficult to get rid of anxiety when sleeping suddenly from a state of sleeping almost horizontally, or suddenly falling backward from the sitting state.

  In particular, a person using an assistive wheelchair cannot bend the upper body by himself, so when the back frame 210 is raised from the stretcher state, the position of the hips is shifted forward by being pushed by the back 221. Sit in front of the seat. Since it is not safe in this state, it is necessary to move the patient so that the assistant can sit in the back of the seat, but in the case of a patient who can hardly move, moving on the wheelchair is a hard work. In addition, when a person requiring care who cannot move himself / herself is placed in a normal wheelchair and then changed to a stretcher state, he / she can only sit shallowly in front of the seat. It is necessary to move the patient to sit deeply, and there is a problem that requires a lot of hard work.

  Therefore, an object of the present invention is to provide a stretcher-use wheelchair that can be changed in form from a stretcher state to a wheelchair state or vice versa after a tilt state.

  In order to achieve such an object, the stretcher / wheelchair of the present invention includes a base frame having wheels, a main frame rotatably supported on the base frame by a shaft, and a rear side of the rotation shaft of the main frame. A back frame rotatably supported by a shaft on the side, a seat frame having a front portion rotatably supported by the shaft on the front side of the rotation shaft of the main frame, and a front frame. A legrest frame that is supported, a rear portion of the seat frame, and a lower end portion of the back frame are slidable in the front-rear direction and rotatably connected to each other, and the rear portion of the seat frame is connected to the lower end of the back frame. A slider connecting portion supported by a portion, a lower end portion of the back frame, and the leg rest frame are connected to each other so as to be freely rotatable. A link for interlocking with the rest frame, and the back frame and the main frame are connected to each other so as to be freely rotatable. A first fixing means for fixing a positional relationship; and a second fixing means for connecting the base frame and the main frame to fix the main frame at an arbitrary angle with respect to the base frame. The seat frame is tilted while sinking the rear portion of the seat frame in conjunction with the standing motion of the seat, and the legrest frame is bent downward to change to a chair shape in the tilted state, or in the tilted state. The form is changed from the chair form to the stretcher state.

  Therefore, when the first fixing means for fixing the positional relationship between the back frame and the main frame is released to cause the backrest in the stretcher state, the slider can be slid through the slider connecting portion in conjunction with the standing motion of the back frame. The seat frame is tilted while sinking the rear portion of the seat frame connected to the frame, and the legrest frame is bent downward so that the chair can be changed into a tilted state. At this time, while the patient's back is raised, the front end side of the seat frame, i.e., the part supporting the knee of the sleeping patient is relatively lifted, so that the knee is supported while supporting the buttocks from the patient's thigh on the seating surface. The patient is able to leave his / her body with peace of mind because he / she lifts his back and lifts his / her back. Then, the form change from the form of the stretcher to the form of the tilted chair while holding the patient is completed, and the tilt state is obtained. Further, to change to the normal wheelchair state, the second fixing means is operated to change the angle of the main frame with respect to the base frame, thereby causing the tilted chair to change to the normal wheelchair state. . Further, when changing the form from the normal wheelchair state to the stretcher state, the form is changed to the tilt state and then changed to the stretcher state. In other words, it does not suddenly change from a stretcher state to a wheelchair state in which the seat surface is kept almost horizontal (referred to as a normal wheelchair state), but a wheelchair state in which the seat surface is inclined so that the back side (rear side) sinks (this book In the specification, it is referred to as a tilted state), and then once transformed into a normal wheelchair state. Also, when changing the form from the normal wheelchair state to the stretcher state, the form is changed to the tilt state and then changed to the stretcher state.

  Further, the slider connecting portion of the stretcher wheelchair according to the present invention is installed on the slide receiver that forms a long hole in the front-rear direction in the rear part of the seat frame, and on the lower end of the back frame that penetrates the long hole and engages the slide receiver. It is preferable that the seat frame is interlocked with the back frame by engagement between the shaft and the long hole.

  The stretcher-use wheelchair of the present invention includes an adjustment plate having a ratchet-shaped groove in which the legrest frame can selectively fix the link at a plurality of positions, and one end of the link is one of the plurality of grooves of the adjustment plate. The angle of the legrest frame with respect to the seat frame is adjustable.

  According to the stretcher-use wheelchair according to claim 1, when changing from the stretcher state to the wheelchair state, or when changing the form from the wheelchair state to the stretcher state, the form is always changed via the tilt state. So, in the middle of the form change, the patient is placed in a state where the knee and back are lifted and held at the same time as the hip is supported on the seating surface, and in the state of normal wheelchair Or form change is completed to the form of a stretcher. Therefore, when changing from a stretcher state to a normal wheelchair state, the seated patient only gets up in the same state, giving him the fear of slipping forward on the seat and giving the momentum to slide down There is nothing. In addition, when changing from a normal wheelchair to a stretcher, tilt it slightly backward while in a sitting position, change the tilt while holding it, and lift it from the buttocks to the waist. However, since the posture is changed so that the legs are extended and the back is tilted, if the abdominal muscles are not stressed, there is no fear of suddenly scooping the feet.

  In addition, even when the back frame is raised from the stretcher state, the position of the hips is not shifted forward by being pushed by the back, and the patient can be changed from the normal wheelchair state to the stretcher state. Even if the person sits shallowly on the front side of the seat, it is safe because the patient can move deeper by moving to the back side of the seat when shifting to the tilted state. Therefore, even in the use of a patient who cannot bend himself or hardly move, he / she does not need a great labor to move the patient on the seat.

  Furthermore, according to the wheelchair for stretcher as claimed in claim 2, since it is a simple structure in which the slide receiver is fixed to the seat frame by welding or the like and the shaft at the lower end of the back frame is penetrated, it is easy to manufacture and assemble. Manufacturing costs can be reduced.

  According to the stretcher-use wheelchair described in claim 3, the angle of the legrest frame with respect to the seat frame can be adjusted, so that the inclination of the legrest that supports the leg can be adjusted according to the patient's situation.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

  FIG. 1 to FIG. 13 show an embodiment of a stretcher / wheelchair according to the present invention. This stretcher wheelchair includes a base frame 1 having wheels 16a and 16b, a main frame 2 that is mounted on the base frame 1 while supporting a frame structure that can be changed into a stretcher state and a chair state, and the frame structure described above. The back frame 3, the seat frame 4 and the leg rest frame 5 are included. In addition, the code | symbol 11 in a figure shows a spine, 12 shows a headrest, 13 shows a seat.

  The main frame 2 is rotatably supported on the base frame 1 by a shaft 21, the back frame 3 is supported by a shaft 23 on the rear side of the rotating shaft 21, and is seated on the front side of the rotating shaft 21. The front part of 4 is rotatably supported by a shaft 24.

  A legrest frame 5 is rotatably supported by a shaft 51 at the front end of the seat frame 4, and the rear portion of the seat frame 4 and the lower end portion of the back frame 3 are slidable in the front-rear direction and rotate relative to each other. The slider frame 6 is slidably and rotatably connected via a slider connecting portion 6 that is freely connected and supports the rear portion of the seat frame 4 at the lower end portion of the back frame 3.

  Further, the lower end portion of the back frame 3 and the legrest frame 5 are coupled to each other by a link 41 so that the back frame 3 and the legrest frame 5 are interlocked with each other. Between them, first fixing means 46 and 47 for fixing the positional relationship between the back frame 3 and the main frame 2 are connected to each other so as to be rotatable. The first fixing means 46 and 47 are extendable and the extension operation is fixed at an arbitrary position. Further, a second fixing means 22 for fixing the main frame 2 to the base frame 1 at an arbitrary angle is provided between the base frame 1 and the main frame 2 to connect the main frame 2 and the base frame 1. It is provided as follows. The second fixing means 22 is fixed to the bracket 48 and the base frame 1 of the main frame 2 by connecting pins 19 and 20. Here, the second fixing means 22 enables the base frame 1 and the main frame 2 to be variably connected to each other so that the main frame 2 can be fixed to the base frame 1 at an arbitrary angle. It is preferable to use a single-acting or reverse-acting fluid pressure cylinder or a reaction force mechanism such as a gas spring with a lock mechanism, but in some cases, a motor-driven screw feed mechanism or the like can be used. . In the case of this embodiment, since a single-acting fluid pressure cylinder is employed, it is simply referred to as a cylinder hereinafter.

  As shown in FIG. 7, the main frame 2 of the present embodiment is configured by a pipe formed in a bell crank shape, and includes a bracket 18 connected to the bracket 17 of the base frame 1 via a shaft 21 at the center. Collars 36 and 37 for fitting the boss portions of brackets 33 and 27 corresponding to shafts 23 and 24 for rotatably connecting the back frame 3 and the seat frame 4 to each other are provided at both ends. A bracket 48 for attaching the first fixing means 47 and one end of the cylinder 22 to the main frame 2 is provided between the bracket 18 and the collar 37 at the tip. Further, a connecting pin 26 for attaching one end of the first fixing means 46 to the main frame 2 so as to be rotatable is provided at a position away from the bracket 48. Note that one end of the other first fixing means 47 is fixed to the bracket 48 via the connecting pin 25.

  The main frame 2 is provided so as to be fixed to the base frame 1 by a cylinder 22, and in a state in which the operation lever 52 provided at the upper part on the back side of the back frame 3 is operated to release the fixing by the cylinder 22. The main frame 2 is provided so as to be tilted (tilt operation).

  As shown in FIG. 1 and FIG. 9, when the back frame 3 is changed to the stretcher state, the lower end portion is under the seat frame 4 and extends to the position of the long hole 32 a on the seat frame 4 side. A collar 28 for supporting the shaft 31 penetrating the long hole 32a of the seat frame 4 while being slightly bent at the front end side is provided. Further, the back frame 3 is provided with a bracket 27 through which a rotation shaft 23 is rotatably connected to the rear end of the main frame 2. Reference numeral 49 in the drawing is a connecting plate for attaching the handle 50. A handle 50 is attached to the connecting plate 49. Further, operation levers 45 and 52 are attached to the handle 50. Reference numeral 10 denotes a square pipe that connects the left and right tubes of the back frame 3. In this embodiment, a stopper rubber 9 for positioning the back frame 3 and the seat frame 4 is attached to the square pipe 10.

  As shown in FIG. 8, the seat frame 4 is formed by bending a pipe into a U shape, and collars 34 for rotatably mounting the legrest frame 5 are provided at both ends of the pipe (the tip of the seat frame 4). Is provided. On the other hand, on the rear side of the seat frame 4, there is provided a slider connecting portion 6 for connecting the lower end portion of the back frame 3 so as to be slidable in the front-rear direction and to be mutually rotatable. The slider connecting portion 6 of the present embodiment is configured by forming a long hole 32 a in the front-rear direction between the seat frame 4 and the slide receiver 32 attached to the seat frame 4, and is installed on the lower end portion of the back frame 3. The seat frame 4 is interlocked with the back frame 3 by engaging the shaft 31 with the slide receiver 32 or the seat frame 4 by passing the shaft 31 through the elongated hole 32a. The slide receiver 32 is formed by, for example, welding a metal bar bent in a U shape as shown in FIG. 8 to the bottom of the seat frame 4 by welding or the like. Thus, a space that becomes the long hole 32a is formed. The slide receiver 32 is formed of a U-shaped pipe when viewed from above with the rear end side (the back side of the seat) of the seat frame 4 bent in an arc shape. In order to arrange the slide receiver 32, it is arranged so as to cross the corner portion obliquely. The shaft 31 passes through a long hole 32 a formed between the seat frame 4 and the slide receiver 32, and is fitted and fixed to the collar at the lower end of the back frame 4 outside the slide receiver 32. Incidentally, reference numeral 35 in the figure denotes an elbow receiving pipe. Reference numeral 33 denotes a bracket for rotatably mounting the seat frame 4 to the front end of the main frame 2.

  One end of first fixing means 46 and 47 that connect between the back frame 3 and the main frame 2 is rotatably fitted and fixed to the shaft 31 that connects the back frame 3 and the seat frame 4. In addition, one end of a link 41 that connects the back frame 3 and the legrest frame 5 is rotatably fitted.

  The first fixing means 46 and 47 whose both ends are rotatably connected between the shaft 31 of the back frame 3 and the main frame 2 are telescopic and can be of any length except when operated. The length can be fixed between the shortened state and the extended state by operating the operation lever 45 provided on the handle 50 attached to the upper back side of the back frame 4. ing. In the case of the present embodiment, as the first fixing means 46 and 47, for example, a well-known lock mechanism generally called a mechanical lock is used. Although the detailed structure of the mechanical locks 46 and 47 is not shown, the movement of the rod is restricted by tightening a coil spring that is wound around a rod that can freely enter and leave the housing. This is a mechanism for fixing the positional relationship. Either the housing or the rod is rotatably connected to the back frame 3 while the other is rotatably connected to the main frame 2 to fix the back frame 3 to the main frame 2 at an arbitrary angle. Is possible. More specifically, the tip of the rod is fitted to the shaft 31 which is the lower end portion of the back frame 3, and the housing side is rotatably fixed to the main frame 2.

  Here, the winding and loosening of the coil of the mechanical lock are performed by lever operation via the wire of the control cable. That is, while the operating lever 45 is being gripped (pulled), the winding of the coil spring is loosened to allow the rod to move freely, and when the operating lever 45 is released, the coil spring is wound and the rod is in that position. To prevent the rod from moving. Therefore, the operation lever 45 is provided on the operation handle 50 on the back side of the spine 11 as shown in FIG. 4, for example, to facilitate the operation of the nurse, and the operation lever 45 can be operated with the operation handle 50 held. Is provided to be possible. By operating the lever, the movement of the rod of the lock mechanism is restricted or released, so that the expansion and contraction is allowed or fixed. The extension of the locking mechanism enables the lower end of the back frame 3 (back 11) to move to the rear end side of the seat frame 4 of the shaft 31, and the contraction of the locking mechanism causes the lower end of the back frame 3 to move. The shaft 31 can be moved toward the front end side of the seat frame 4, that is, the back frame 3 can be tilted. Then, the back frame 3 can be fixed at an arbitrary angle with respect to the main frame 2 and thus the seat frame 4 by fixing the lock mechanism to an arbitrary length. That is, the lengths of the mechanical locks 46 and 47 are fixed and function as links, and the main frame 2, the back frame 3 and the seat frame 4 including the mechanical locks 46 and 47 are fixed chains.

  In the case of the present embodiment, two mechanical locks 46 and 47 facing different positions and different directions are provided. In this case, the dead point as the first fixing means can be eliminated. Since these two mechanical locks 46 and 47 originally function as one first fixing means, they are simultaneously operated by operating one operation lever 45. Further, the first fixing means is not limited to the mechanical lock mechanism of the present embodiment, and it is also possible to employ one that also serves as a reaction force mechanism such as a gas spring with a lock mechanism. Reference numeral 25 denotes a connecting pin for rotatably attaching one end of the mechanical lock 47 to the main frame 2.

  The legrest frame 5 is for supporting the legrest 14 and the footrest 15, and the legrest 14 is attached via a leg slide assembly member 30 as shown in FIG. 11. In the present embodiment, the legrest frame 5 is provided with an adjusting plate 43 having a ratchet-shaped groove 44 that can selectively fix the link 41 at a plurality of positions. ) Is adjustable. That is, with the ring 39 at one end of the link 41 inserted between the two adjustment plates 43 having the plurality of grooves 44, the connecting rod 42 as shown in FIG. The connecting rod 42 is engaged and fixed in the groove 44. Therefore, the angle of the legrest frame 5 with respect to the seat frame 4 can be adjusted by changing the groove 44 into which the connecting rod 42 is fitted. In addition, a pipe 29 is provided at the upper end of the legrest frame 5 so as to be engaged with the collar 34 of the seat frame 4 so as to be rotatably connected.

  Here, the link 41 is for linking the legrest frame 5 to the back frame 3, and one end is fitted to the shaft 31 of the back frame 3 as shown in FIGS. 10A and 10B, for example. And a collar 40 that is rotatably connected, and has a ring 39 that is inserted between the two adjustment plates 43 at the other end and through which the connecting rod 42 is inserted.

  According to the stretcher / wheelchair configured as described above, when the back frame 3 is raised by releasing the fixation by the mechanical locks 46 and 47 from the stretcher state shown in FIG. The leg rest frame 5 interlocked with the leg rest, the leg rest 14 supported by the leg rest 14 and the footrest 15 rotate downward. The back frame 3 rotates about the shaft 23, but the shaft 31 at the lower end of the back frame 3 is engaged through the long hole 32 a formed by the slide receiver 32 of the seat frame 4. In conjunction with this, the seat frame 4 rotates around the shaft 24. The direction of this rotation is the direction in which the rear part of the seat 13 descends. At this time, the seat frame 4 is inclined and the legrest frame 5 is lowered while sinking the rear portion of the seat frame 4 slidably connected via the slider connecting portion 6 in conjunction with the standing motion of the back frame 3. It can be bent to the side and changed into a chair form in the tilted state. Thus, the tilted wheelchair state shown in FIG. 2 is reached. Here, as the back 11 on the back frame 3 and the seat 13 on the seat frame 4 are changed from the stretcher state to the tilt state, the rear end of the seat 13 is separated from the lower end of the back 11 (see FIG. Therefore, it is useful for preventing the seated person from slipping forward when raising the spine 11.

  Further, to change to the normal wheelchair state shown in FIG. 3, if the main frame 2 is rotated around the shaft 21 with respect to the base frame 1 by operating the cylinder 22, the angle of the main frame 2 with respect to the base frame 1 changes. To do. This raises the chair in a tilted state and changes the form to a normal wheelchair state. By raising the main frame 2 itself, the shape of the wheelchair is changed into a normal wheelchair state in which the seat 13 is almost horizontal without changing the frame structure on the main frame 2 which is changed to the shape of a wheelchair. To change. Here, the cylinder 22 is fixed in an extended state in the stretcher state and the tilt state. By changing the cylinder 22 from the extended state to the contracted state, the front of the main frame 2 is pulled more than the rotating shaft 21 and the entire main frame 2 tilts forward, so that the entire frame in the form of a chair remains intact. Get up in the form of

  Further, when changing the form from the normal wheelchair state to the stretcher state, the main frame 2 is returned to the original position by releasing the cylinder 22, so that the form is once changed to the tilt state and then changed to the stretcher state. . That is, once the state is changed to the tilt state (FIG. 2), the form is changed to the stretcher state (FIG. 1) or the normal wheelchair state (FIG. 3).

  Here, in the stretcher state, the mechanical locks 46 and 47 are contracted and fixed, and when the state is shifted to the tilt state, the mechanical locks 46 and 47 are extended and fixed. Release of the mechanical locks 46 and 47 and release of the cylinder 22 are completely independent operations. On the other hand, the two mechanical locks 46 and 47 are operated in common. In the present embodiment, the mechanical locks 46 and 47 are such that only one of the mechanical locks 46 extends in the wheelchair state (including the normal state and the tilt state), and this is the stopper (movable of the frames 3 and 4 in the wheelchair state). Range regulation). On the other hand, the positional relationship between the back frame 3 and the seat frame 4 in the stretcher state is such that the stopper rubber 9 provided so that the rear end of the seat frame 4 protrudes to the back side of the back frame 3 as shown in FIG. By being hit, it is provided so as to be kept constant by the frictional force. Further, the movable range of the main frame 2 is determined when the cylinder 22 is fully retracted in the normal wheelchair state (FIG. 3), and before the cylinder 22 is fully extended in the tilted state (FIG. 2) and the stretcher state (FIG. 1). Further, the rearward tilt position of the main frame 2 is caused by the contact between the stopper rubber 7 provided on the bracket 17 that rotatably supports the main frame 2 of the base frame 1 and the stopper pin 8 provided on the main frame 2 side. Identified.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, the slider connecting portion 6 of the present embodiment is configured by passing the shaft 31 of the back frame 3 through a long hole 32a formed by the seat frame 4 and the slide receiver 32, but is particularly limited thereto. Instead, the seat frame 4 itself may be perforated with a long hole 32a to penetrate the shaft 31, or other sliders may be used.

[BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view which shows one Embodiment of the wheelchair combined with a stretcher of this invention, and shows the state which changed the form into the stretcher state. Similarly, a state in which the shape of the stretcher-use wheelchair of the present invention is changed to a tilted state is shown. Similarly, the state in which the shape of the stretcher combined wheelchair of the present invention is changed to a normal wheelchair state is shown. The side view of the wheelchair and the wheelchair of the present invention continuously shows the form change from the stretcher state to the normal wheelchair state. It is a bottom view of the wheelchair and wheelchair of FIG. It is a figure which shows one Embodiment of a base frame, (A) is a top view, (B) is a side view. It is a figure which shows one Embodiment of a main frame, (A) is a top view, (B) is a side view. It is a figure which shows one Embodiment of a seat frame, (A) is a top view, (B) is a side view. It is a figure which shows one Embodiment of a back frame, (A) is a top view, (B) is a side view. (A) And (B) is the top view and side view which show one Embodiment of a link, (C) is a front view which shows one Embodiment of a connection rod. It is a figure which shows one Embodiment of a legrest frame, (A) is a front view, (B) is a side view. It is explanatory drawing which shows the positioning state of a back frame and a seat frame when a form change is carried out to a stretcher state. It is explanatory drawing which shows the positioning state of a main frame and a base frame when a form change is carried out to a stretcher state and a tilt state, (A) is a side view, (B) is a rear view. It is a side view which shows the state which changed the form to the stretcher state of the conventional stretcher combined use wheelchair. It is a side view which shows the state which changed the form into the normal wheelchair state of the conventional stretcher combined use wheelchair. It is a side view which shows the state which changed the form into the tilt state of the conventional wheelchair and wheelchair.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base frame 2 Main frame 3 Back frame 4 Seat frame 5 Leg rest frame 6 Slider connection part 21 The axis | shaft which connects a main frame and a base frame rotatably 22 Cylinder (2nd fixing means)
23 A shaft that rotatably connects the main frame and the back frame 24 A shaft that rotatably connects the main frame and the seat frame 31 Shaft (lower end of the back frame)
32 Slide receiver 32a Long hole 41 Link for rotatably connecting the back frame and legrest frame 42 Connection rod for rotatably connecting the legrest frame and link 43 Adjusting plate 44 Groove 46 Mechanical lock (first fixing means)
47 Mechanical lock (first fixing means)
51 A shaft that rotatably connects the seat frame and the legrest frame

Claims (3)

A base frame including wheels; a main frame rotatably supported on the base frame by a shaft; a back frame rotatably supported by a shaft on a rear side of the rotation shaft of the main frame; and the main frame A seat frame in which a front portion is rotatably supported by a shaft in front of the rotation shaft of the frame, a legrest frame rotatably supported by a front end of the seat frame, a rear portion of the seat frame, and the A slider connecting portion that is slidable in the front-rear direction and rotatably connected to the lower end portion of the back frame and supports the rear portion of the seat frame at the lower end portion of the back frame; and a lower end portion of the back frame; A link for connecting the legrest frame to each other in a rotatable manner to link the back frame and the legrest frame; A first fixing means that is connected to each other in a freely rotatable manner, is extendable, and its extension operation is fixed at an arbitrary position to fix the positional relationship between the back frame and the main frame, A second fixing means for connecting the base frame and the main frame to fix the main frame at an arbitrary angle with respect to the base frame; and a rear portion of the seat frame in conjunction with a standing motion of the back frame The seat frame is tilted while the seat is sunk and the legrest frame is bent downward to change to a chair shape in a tilted state, or to change from a tilted chair shape to a stretcher state. This is a stretcher wheelchair. The slider connecting portion is composed of a slide receiver that forms a long hole in the front-rear direction in the rear portion of the seat frame, and a shaft that is installed at the lower end of the back frame that penetrates the long hole and engages the slide receiver. The stretcher-use wheelchair according to claim 1, wherein the seat frame is interlocked with the back frame by engagement of the shaft and the elongated hole. The legrest frame includes an adjustment plate having a ratchet-shaped groove capable of selectively fixing the link at a plurality of positions, and by fixing one end of the link to any of the plurality of grooves of the adjustment plate, The stretcher-use wheelchair according to claim 1 or 2, wherein an angle of the legrest frame relative to a seat frame is adjustable.

Images