JP5762256B2 - Mobility chair for walker - Google Patents

Description

  The present invention relates to a walker / moving chair in which a chair and a walker disposed on a hospital bed or the like are integrated.

Conventionally, a wheelchair with wheels that can be moved while sitting for a person who has difficulty walking is usually provided in a hospital bed, etc., and a movable walker with casters for rehabilitation etc. Are also always available.
By the way, many things which united these movable wheelchairs and walker into one device are disclosed and proposed. For example, the “folding walker” disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-142419) is provided with a pair of all four casters on the front, rear, left and right, and presses the tire surfaces of the rear left and right casters with a system pin. And what is braked is disclosed. With this device, when the wheelchair and walker hold the brake lever, the caster is in a braking state and is normally in an unbraking state.

Further, for example, in the “walker and wheelchair” of Patent Document 2 (Japanese Patent Laid-Open No. 2001-321404), driving wheels are provided outside the four casters, and the normal brake presses the tires of the large wheels. The brake member is operated, and when used as a walker, the armrest is used up to a position where it can be used in a walking state.
A device that is not a walker or wheelchair, but locks and unlocks all casters at the same time, has been developed by the applicant as a floor-top caster on which a TV or the like is placed. 3 (Japanese Patent Laid-Open No. 2010-143290).

JP 2000-142419 A JP 2001-321404 A JP 2010-143290 A

  By the way, since the “walker / wheelchair” disclosed in Patent Document 2 locks the large-diameter large wheel 1 for driving, the ground contact area is large and the braking force is large, but the direction of the large wheel itself is fixed. Since there is no turning ability, there is a problem that the radius of curvature becomes large when the wheelchair is bent, and it is difficult to turn in a small direction, and unexpected accidents such as clothes getting caught in rotating large wheels Furthermore, when the walker / wheelchair is locked, it is necessary to brake each of the pair of large driving wheels. In addition, when the walker / wheelchair is locked, the brake pin is pressed against the tire, which sometimes hurts the tire.

Further, as in Patent Document 1, since only a pair of rear wheels can be locked among a plurality of casters of the “foldable walker”, braking is unstable, and further, the rear wheels are locked. There is a problem that the caster side does not have a turnability and has a large radius of curvature when the walker and the wheelchair bend, making it difficult to turn in a small direction. In addition, each individual caster had to be locked individually, which was a burden on the user and nurse. In particular, there is a problem that it is extremely troublesome for busy nurses.
In recent years, hospitals have been working to eliminate portable toilets to prevent bedside falls. However, by eliminating it, nurses are often called as patient toilet aids. Therefore, by using what is normally used as a chair and becoming a walking aid, the attendance of the nurse can be reduced and the work can be reduced.

In addition, there are often chairs for visitors in small hospital rooms, but there are also wheelchairs, walker and instillers, etc., but these are always placed in hospital rooms because of space requirements. There was a problem.
Also, when used as a visitor chair, it is usually necessary to lock it, but normal walker and wheelchair are set to move at all times, and the lever is operated when braking. Many of the wheels were bare and the appearance was inferior for visitors.

  An object of the present invention is a walker / mobile chair that can be used as a visitor's chair, can also be used as a walker that assists the movement of the patient itself, and has good turning performance during movement. It is easy to move, and as a visitor, the casters are normally locked, all the casters are unlocked only at the time of movement, and it is locked at the same time so that the burden on the user and nurse is reduced. Further, the present invention provides a walker / moving chair that can be unlocked and further provided with an infusion bar as required.

In order to solve the above-mentioned problem, the invention of claim 1 is a walker / moving chair provided with a plurality of swivelable casters in the front, rear, left and right on the base part,
It said base portion is provided a walker unit and the seat part in Rutotomoni, placing the grip portion of the walking dexterity on the back of the chair portion,
The gripping part spans almost the entire width of the chair part. The gripping bar is stretched to the left and right side parts. The gripping bar spans the left and right side parts and casts on the lower part of the lower gripping bar. Along with the lever, the upper gripping bar can be adjusted in height,
The caster operation lever operates an operation mechanism so that all casters can be locked and unlocked simultaneously, and the operation mechanism releases the lock of the caster when the caster operation lever is gripped.
The caster is a walker / moving chair characterized in that a cover portion is provided so that the caster is not exposed to the outside .

According to a second aspect of the present invention, in the walker / moving chair according to the first aspect, an attachment portion for attaching a drip bar is provided on the walker portion or the chair portion.

According to the invention of the walker / movable chair of claim 1, since all four (multiple) swivelable casters on the front, rear, left and right are provided, the swivel performance is good and easy to move. At the same time, a caster operation lever that performs locking and unlocking operations is provided, reducing the burden on the operation of the user and nurse, and the chair base and walker unit are integrated into the leg base, so in a narrow hospital room Neither occupies the place.
In recent years, hospitals have been working to eliminate portable toilets to prevent patients from falling over bedside. However, by eliminating portable toilets, nurses are often referred to as patient toilet assistance, but by using what is normally used as a chair, it becomes a nursing aid. The attendance of the teacher can be reduced, resulting in reduced work.
In addition, since all casters are locked in a normal state, the chair can be used as a fixed chair for visitors, and if all casters are unlocked together, the chair remains seated like a conventional wheelchair. Can be used as a moving chair.
In addition, a caster operation lever that simultaneously locks and unlocks all casters at the same time is provided in the vicinity of the gripping unit, so that the caster operation lever can be easily operated by the user's hand gripped by the gripping unit. it can.
In addition, since the gripping rods are arranged in two steps and spanned on both sides, it is possible to appropriately cope with different heights and the like.
In addition, since the caster operation lever is located below the lower gripping rod, when holding it as a starting aid, there is a lower gripping rod, so if you touch your hand quickly, touch the lower gripping rod. Therefore, it is possible to prevent the malfunction of the caster of the walker / movable chair being unlocked.
Also, since the casters are covered with an outer cover so as not to be exposed to the outside, clothes are not wrapped around the wheels, and large wheels and casters are exposed as before to improve the appearance for visitors. Can be used as a visitor chair.
The caster lock and unlock operation mechanism is unlocked when the handle of the operation mechanism is grasped, so that it can be used as a visitor chair. Ordinary walker and wheelchair can be moved at all times.

According to the invention of the walker / moving chair according to claim 2, the walker / chair is provided with an attachment portion for attaching the drip rod, so that the walker / movable chair is stable even if the drip rod is attached. Ru can be a fallen hard to drip rod from the fact that.

An external perspective view from the right side of the walking chair combined movement chair of the present invention, FIG. 1 is a perspective view from the back of FIG. Bottom view of FIG. 4 (a) is a cross-sectional explanatory view from the side of the internal mechanism of the caster operating lever in which the walker / moving chair in FIG. 1 is fixed and the caster is locked, and FIG. FIG. 4C is a cross-sectional explanatory view from the side of the internal mechanism of the caster operating lever illustrating the state in which the two-wheel caster is unlocked by raising the caster operating lever. FIG. 3 is an overall configuration diagram of the operation transmission mechanism of FIG. 3; 6 (a) is an enlarged exploded view of one end of the lever connecting wire of FIG. 5, FIG. 6 (b) is an enlarged exploded view of the lever connecting wire of A part, FIG. 7 (a) is an enlarged exploded side view of the branch wire at B in FIG. 5, FIG. 7 (b) is an enlarged exploded view of the branch wire at the other end of FIG. 8A is a front view of the inside of the wire branch board 32 of FIG. 5, FIG. 8B is a side sectional view of the wire branch board taken along the line aa of FIG. FIG. 1 is a schematic external perspective view of the twin-wheel caster of FIG. FIG. 10 (a) is a front view and FIG. 10 (b) is a side view of one wheel portion of a twin-wheel caster. FIG. 11 (a) is a front perspective view of a state in which the knock member is raised and the tooth portion 542 is fitted to the internal gear 45, and FIG. 11 (b) is its knock. Side perspective view of the member, Sectional view taken along line (a)-(a) in FIG. FIG. 13 (a) is a front perspective view of the double wheel caster in the unlocked state, and FIG. 13 (b) is a side perspective view of the knock member. FIG. 13A is a plan view from above of the caster mounting bracket of FIG. A perspective view of the base portion 541 of the wheel tooth meshing lock portion 54, FIG. 16A is a front view, FIG. 16B is a side view, and FIG. 16C is a top view of the slider cam.

  The present invention relates to a walker / moving chair that can be used as a walker and a movable chair, in which all casters can turn and have a lock / unlock function by remote control. Here, the Example applied to the suitable walker / moving chair of this invention is described along drawing.

(Foundation with casters, chair and walker)
FIG. 1 is an external perspective view of the entire walking chair / movable chair 1 of the embodiment from the right side, FIG. 2 is a perspective view from the back, and FIG. 3 is a rear view.
On the bottom surface of the base 11 with casters, a pair of twin wheel casters 4a, 4b are arranged on both the left and right sides of the front side, and a pair of twin wheel casters 4c, 4d are also arranged on the left and right sides of the rear side. A trapezoidal leg portion 13 and a chair portion 12 are mounted and fixed on the front side of the upper surface of the base portion.
The chair portion 12 is provided with a cushion portion 121 for receiving a heel portion, a backrest portion 122, and a pair of armrest portions 123 on the left and right, forming a high-class chair that can be used as a visitor chair.

Further, a walker unit 14 is formed on the rear side of the upper surface of the base unit, and this walker unit 14 is formed of side plates 17 (17a, 17b) that form the left and right sides of the walker / movable chair 1. The mounting column 172 of the gripping part (caster operation part) provided in the rear part is composed of a gripping part consisting of a two-stage gripping rod, and it is relatively easy for patients and nurses to operate even if they are not in the middle waist The caster operation 2 and the caster operation lever 21 are arranged at a low position. Of these two stages of the gripping rod, the caster operation lever of the caster operation unit 2 is stretched around the lower side of the lower gripping bar 15. 21 is arranged so that the lower gripping rod 15 and the caster operation lever 21 can be grasped simultaneously with one hand. In addition, since the caster operation lever 21 is arranged below the lower gripping rod 15, there is a lower gripping rod when gripping as a stand-up assist, so when touching the hand, touch the lower gripping rod. Since the operation lever 21 is prevented from being touched, the caster of the walker / movable chair 1 is not unlocked, and it is safe to prevent malfunction.
Furthermore, the upper gripping bar 16 is arranged at a slightly higher position of the backrest part 122 and is fixed so that the height position can be adjusted as necessary, and is configured to be easily operated by a user such as a patient or a nurse. .

The lower portions of the left and right side plates 17a and 17b are configured to cover the two-wheel caster 4 from the outside of the side, and a cover portion 171 up to the front of the floor is formed so as not to get anything caught in the caster. It has a high-class feel that can be used as a visitor chair.
Further, in the embodiment, the drip portion mounting member 18 (FIG. 2) to which a drip rod (not shown) can be attached to the mounting column portion 172 of the side plate 17 on which the caster operation lever 21 is not disposed is provided as necessary. However, the position of the mounting portion 18 may be at an appropriate position of the walker 14 or the chair 12 of the walker / movable chair 1, and the walker / movable chair 1 is heavy and considerably Since it is a stable moving device, the attached drip bar is also difficult to fall.

As shown by the dotted line and the alternate long and short dash line in FIG. 3, an operation transmission wire 30 that is a coaxial wire of the operation transmission mechanism 3 is connected from the caster operation 2 to each double wheel caster 4, and by operating the caster operation lever 21, All casters are configured to perform locking and unlocking operations simultaneously at the same time. That is, as shown in FIG. 2, when the caster operation lever 21 is grasped and lifted up, the lever connecting wire 31 (one-dot chain line) in the caster operation 2 is pulled, and then, as shown in FIG. 32 is divided into four branch wires 33 (33a, 33b, 33c, 33d: dotted lines), and each branch wire 33a, 33b, 33c, 33d is pulled, and the wheel lock of each twin wheel caster 4a, 4b, 4c, 4d By operating the mechanism 5, all the twin wheel casters 4a, 4b, 4c, and 4d are simultaneously unlocked simultaneously. On the contrary, when the caster operation lever 21 is released, the caster operation lever 21 is automatically lowered by the spring in the wheel lock mechanism 5,
The four branch wires 33 (33a, 33b, 33c, 33d) also return to their original positions, and the two-wheel casters 4a, 4b, 4c, 4d are locked by the wheel lock mechanism 5.

(Caster operation part)
The details of the following operation structure will be described.
1 and 2 are external perspective views in which a plurality of four wheel casters 4 in the front, rear, left, and right are locked in the caster operation unit 2, but FIG. 2 is a diagram of the lock state of the four twin wheel casters 4. 4a to 4c are partial cross sections of the caster operation unit 2 for explaining a state where the lock is released from this locked state.
First, FIGS. 4a to 4c show the unlocked state from the locked state of the four twin-wheel casters 4, and FIGS. 4 (a) to (c), FIG. Referring to FIGS. 11 and 12, the caster operation unit 2 mainly includes an operation lever 21, a rotating shaft 22, a wire end (ball) locking unit 23, a wire guide pulley 24, and a wire covering (outer periphery) locking. It comprises a part 25, a rotary stopper 26, a caster lock release holding lever 27, and a case 28.

The operation of the caster operation unit 2 is as follows. In FIG. 4A in the caster locked state, the caster operation lever 21 rotates about the rotation shaft 22, and the wire end (ball) locking unit is integrated with the caster operation lever 21. 23, the rotary stopper stopper 211, and the lock holding stopper 212 also rotate. Normally, the inner wire 312 of the lever connection wire 31 (operation transmission wire 30) is also always pulled through the branch wires 33 by the spring force of the caster lock mechanism (right side in FIG. 4A).
Accordingly, the caster operating lever 21 has an end 311 of the inner wire 312 locked to the wire end (ball) locking portion 23. As a result, the operation lever 21 is turned counterclockwise and lowered (FIG. 4A), and is usually locked and fixed by the spring of the wheel lock mechanism 5.
It should be noted that the rotating stopper stopper 211 locks the rotating stopper 26 fixed to the case 28 so that the caster operation lever 21 does not rotate excessively.

When a nurse or patient wants to move the chair part 12 of the walker-use mobile chair 1 or to use the walker part 14, as shown in FIG. 4 (c) and FIG. 4 (b) during the operation. This is done by raising the operation lever 21 upward.
In FIG. 4C, when the caster operating lever 21 of the caster operating unit 2 is given, the operating lever 21 is connected to the lever via the wire branch board 32 and each branch wire 33 against the force of the spring of the caster lock mechanism. The wire 31 is pulled upward in the figure, and the caster operation lever 21 is raised to the state shown in FIG. As a result, the operation lever 21 turns clockwise as shown in FIG. 10C and releases the lock against the spring of the wheel lock mechanism 5.

In this state, the walker / movable chair 1 is movable, but the caster operation lever 21 must be lifted by hand. Therefore, when the movable state is maintained for a long time, the caster lock release holding lever 27 is Even if the lock portion is pulled and locked to the lock holding engagement portion 212 and the hand is released, the caster operation lever 21 remains in the raised state (FIG. 4c), and when the movement is finished, the caster lock release holding lever 27 is retained. Is returned to the original state of the caster operating lever 21 (FIG. 4A), and is locked and fixed by the spring of the wheel lock mechanism 5.
However, the caster lock release holding lever 27 and the lock holding engagement portion 212 are deleted in order to prevent the lock from being accidentally released even in a normal state where the wheel must be locked. Also good.

(Operation transmission mechanism)
The operation transmission mechanism 3 uses a coaxial so-called lock wire composed of an inner wire that forms a core and an outer wire that is coaxial and is also a covering portion. As shown in FIG. The operation transmission wire 30 includes a lever connecting wire 31 (31a, 31b) and four branch wires 33 (33a, 33b, 33c, 33d).

  The lever connecting wire 31 attached to the caster operating part 2 is composed of a core inner wire 312 and a covering part 313 which is an outer wire covering the core, as shown in FIG. A spherical end portion 311 a is provided at the tip of the inner wire 312, and a mounting fixing portion 314 is provided at the tip of the covering portion 313, so that the inner wire 312 can move forward and backward with respect to the mounting fixing portion 314. The other end 311b (see FIG. 6a) is connected to the wire branch board 32. The end portion 311b on the opposite side of the lever connecting wire 31 is cylindrical as shown in FIG. 6A, and is connected to the fitting portion 3221 (see FIG. 8) of the wire branch board 32.

  Here, the configuration of the wire branch board 32 will be described with reference to FIG. 8. As shown in FIGS. 8 (a) and 8 (b), the first wire branch board 32 of the wire branch mechanism has a lid 321 (see FIG. 8). Inside the opening 8 (b), a slider 322 is accommodated so as to be movable left and right. Attach the mounting fixing part 314 of the lever connecting wire 31 to the side plate 323a on the lever connecting wire 31 side of the wire branch board 32, and the side plate 323b on the opposite side of the slider 322 corresponds to the end 331b of each wire, The end portion 331b is fitted into a fitting portion 3221 composed of a semi-cylindrical half-cylindrical portion 32212 and a through groove 32212 whose ends are released.

Further, as shown in the cross-sectional view along line aa in FIG. 8 (a), this slider 322 is provided at the end of the inner wire 332 of the four branch wires 33 (33a, 33b, 33c, 33d). Since the moving distance of the end portion 331a must be the same, a plurality of peak portions 3223 parallel to the moving direction of the upper surface of the slider 322 are provided, and the peak portion 3223 is left and right as shown in the side view in which the lid 321 is fitted. A guide groove 3211 that guides in the direction is provided in the lid 321 so that the slider 322 accurately translates with respect to the wire axis. Needless to say, on the contrary, a parallel peak portion 3223 may be provided on the lid 321 and a corresponding guide groove 3211 may be provided on the slider 322. A fixing convex portion 3212 is inserted and fixed to the inner wall of the wire branch board 32 on the fitting side surface of the lid 321.
Therefore, as a parallel advance / retreat movement means for moving the slider 322 in parallel with the advance / retreat direction of the inner wires 312, 332, as well as the both side walls inside the wire branch board 32, this alone is not sufficient for parallel movement. Therefore, a plurality of parallel ridges 3223 are provided on the upper surface of the slider 322, and guide grooves 3211 for guiding the ridges 3223 in the left-right direction are also provided on the lid 321 side.

Next, the structure and function of the wire branch board 32 and the branch wire 33 will be described.
The branch wire 33 (33a, 33b, 33c, 33d) is as shown in FIG. 7, and one of the branch wires 33 (33a, 33b, 33c, 33d) is an enlarged view of the symbol B in FIG. The end portion of the wire 332 is provided with an end portion 331 having an engagement hole at the center thereof, the end of the cover portion 333 is provided with a mounting fixing portion 334, and the inner wire 332 is attached. The end portion 331 is configured to be able to advance and retract with respect to the fixing portion 334.
Thus, one end portion 331a (FIG. 8 (b)) is the same as the end portion 331b of the lever connecting wire 31 and is cylindrical, and is connected to the four twin wheel casters 4 (4a, 4b, 4c, 4d). The terminal portion 311b (FIG. 8 (a)) is different only in that a fitting hole is provided in order to connect to the lock mechanism frame 51, and the other description is omitted.

In this way, the one lever connecting wire 31 is attached to the attachment fixing portion 314 of the side plate 323 a, and the end portion 311 b of the inner wire 312 of the lever connecting wire 31 is fitted to the fitting portion 3221 of the slider 322. Similarly, the attachment fixing portion 334 of the four branch wires 33 is also attached to the side plate 323b, and one end portion 331a of the branch wire 33 (33a, 33b, 33c, 33d) is also fitted to the fitting portion 3221. ing.
With this configuration, when the end portion 311b of the lever connecting wire 31 is pulled, the slider 322 moves to the side plate 323a side (FIG. 8: right direction), but the four ends fitted to the slider 322 are used. The part 331a also moves away from the side plate 323b at once (FIG. 8: right direction).

Thus, the advance / retreat movement of the lever connecting wire 31 is transmitted to the four branch wires 33 via the wire branch board 32. Since the coaxial wire is used for the operation transmission, as shown in FIG. 8, the positions of the four twin wheel casters 4 can be freely set on the lower surface of the base portion 11 of the walker / movable chair 1, and the link mechanism Unlike the above-mentioned combination and the grounding member for floating the entire table as in the above-mentioned Patent Document 1, the structure is simple, the production cost is low, and maintenance is easy. Furthermore, since the lever connecting wire 31 is basically branched from one to four branch wires 33 (33a, 33b, 33c, 33d), the four casters can be accurately and simultaneously used with a very simple configuration. Since the wire branching board 32 can be formed thin and flat because it can be locked and unlocked, the height of the wire branching mechanism can be lowered and thinned, so that it can be attached to the bottom of the lower base portion 11 that is not high from the floor.
In other words, one lever connecting wire 31 from the caster operating portion 2 is branched into four branch wires 33 and connected to the four caster operating mechanisms which are the wheel lock mechanisms 5, and one lever connecting wire 31 is connected. The forward / backward movement of the inner wire 312 is transmitted to the forward / backward movement of the inner wire 332 of the four branch wires 33, and a wire branch board 32 is provided as a wire branch mechanism for branching to the four branch wires 33. The wire branch board 32 is provided with a slider 322 for fixing the four end portions 331 of the branch wires 33 (33a, 33b, 33c, 33d) in parallel, and the slider 322 is set in the forward and backward directions of the inner wires 312 and 332. Can be accurately transmitted in parallel.

(Arrangement of twin wheel casters)
FIG. 8 described above is a plan view of the back surface of the base portion 11 with casters, and a pair of twin wheel casters 4 (4a, 4b, 4c, 4d) are attached to the front and rear, and the outline of the appearance of these casters 4 is shown in FIG. Although details of the configuration of the caster 4 will be described later, a pair of wheels 41A and 41B are rotatably supported on both sides of a lock mechanism frame 51 of a wheel lock mechanism 5 which is a caster operating mechanism. On the upper surface of the lock mechanism frame 51, there is provided a turning support portion 52 for pivotally supporting the caster 4 with respect to the mounting frame so as to move up and down coaxially with the axis X of the turning support portion 52. The knock member 531 is provided. When the knock member 531 is pushed up by the pressing spring 543, the twin wheel caster 4 is locked and the wheel portion 41 cannot rotate. On the contrary, when the knock member 531 is lifted up and released downward, the tooth portion 542 to the internal gear 45 of the double wheel caster 4 is released, the lock is released, and the double wheel can freely rotate.
By the way, the twin-wheel casters 4 (4a, 4b, 4c, 4d) used in this embodiment are more stable than the single-wheel casters because the width of the twin wheels is wider than that of the single wheels. Locking can prevent turning because of the wide width of the twin wheels as well as the direction of travel.
Therefore, as in this embodiment, when the four casters are locked, even if the lock mechanism of one of the four casters is incomplete or damaged, the bedside table is surely secured. Can be fixed and released.

(Caster wheel)
The wheel portion 41 of the above-described twin wheel caster 4 will be described. As shown in FIG. 9, one wheel portion 41 (41A, 41B: wheel) is arranged on each side of each of the four twin wheel casters 4, As shown in FIG. 10, the wheel shaft 42 is rotatably supported by a wheel bearing portion 511 of the wheel lock mechanism 5 (see FIG. 11), and the wheel portion 41 is fixed to the wheel shaft 41. The wheel shaft fixing portion 43 may be pivotally supported by the portion 43 (the wheel shaft fixing portion 43 may be configured to pivotally support the wheel). The outer ring 44 of the wheel portion 41 is made of rubber and absorbs vibrations, smoothes running, reduces noise, and strengthens the grip to the floor.
Further, an inner gear 45 coaxial with the wheel shaft 42 is formed in the vicinity of the outer ring 44 inside the wheel portion 41 of the twin-wheel caster 4, and when a lock tooth portion 542 described later is raised by a pressing spring 543, The tooth portion 542 meshes with the gear 45 to prevent the wheel portion 41 from rotating.

(Caster wheel lock mechanism)
As described in FIG. 9, the caster of this embodiment is a twin-wheel caster 4 of wheels 41A and 41B having a predetermined interval with the lock mechanism frame 51 of the wheel lock mechanism 5 interposed therebetween. Travel is more stable than casters. Further, when both wheels (double wheels) of the wheels 41 (41A, 41B) are locked, the vehicle cannot run and the turning of the caster is restricted. Further, as in this embodiment, the base portion 11 of the walker / movable chair 1 is used. When the two wheel casters 4a and 4b at the two ends of the frame 132 and the wheels 41A and 41B of the two wheel casters 4c and 4d are fixed, the rotation of the wheels can be performed without fixing the turning of the caster 4 itself. It is found that the walker / movable chair 1 is almost completely fixed only by fixing, and is based on this knowledge.

First, the wheel lock mechanism 5 of the twin-wheel casters (4a to 4d) disposed on the back surface of the base portion 11 with casters will be described in more detail with reference to FIGS.
FIG. 11 is a view of the caster locked state, in which the knock member 531 is loosened by the branch wire 33, the slider cam 56 is moved to the left side by the coil spring 567, and the knock portion 53 is raised upward. 14 (a) is a cross-sectional view of the wheel lock mechanism 5, and FIG. 11 (b) is a side cross-sectional view of FIG. 11 (a). FIG. 12 is a cross-sectional view taken along the line aa in FIG. 12A, and shows a state in which the tooth portion 542 is fitted and locked to the internal gear 45 of the twin wheel caster 4.
FIG. 13 is a view of the unlocked state of the twin-wheel caster 4 with the tooth portion 542 separated from the internal gear 45. The knock member 531 is pulled by the branch wire 33, and the slider cam 56 resists the tensile force of the coil spring 567. Is moved to the right side in the figure, and the tooth portion 542 is lowered against the pressing spring 543 inside the caster, that is, the caster is unlocked. FIG. 14 is a diagram of FIG. It is a top view from above.

  11 (a) and 11 (b) are diagrams showing a normal state of the walker / movable chair 1, that is, in a state where the operation lever 21 is lowered in FIG. In the frame 51 of the wheel lock mechanism 5, a turning support 52 is pivotally supported so that the two-wheel caster 4 can turn with respect to the caster mounting bracket 55, and a knock portion 53 that moves up and down inside the turning support 52. The wheel tooth meshing lock portion 54 is connected to the knock portion 53 via a pressing spring 543. In the state where the tooth portion 542 is raised by the pressing force of the pressing spring 543 by the cam surface 561 of the slider cam 56 that moves the knock member 531 up and down, the wheel tooth meshing lock portion 54 also has the tooth portion 542 The tooth portion 542 is engaged with the internal gear 45 inside the wheel portion 41, the rotation of the wheels 41A and 41B is prevented, and the twin-wheel caster 4 is locked.

Here, the configuration of each part will be described in more detail. First, the lock mechanism frame 51 is molded of plastic, and as shown in FIG. 11, a wheel bearing 511 is provided at the center, and the frame 51 On the left side, a cylindrical fitting portion 512 into which the swivel support portion 52 (knock portion 53) is inserted and a storage portion 513 are arranged, and the portion of the fitting portion 512 adjacent to the caster mounting bracket 55 is the two-wheel caster 4 A projecting wheel 514 is provided for smooth turning, and a storage portion 515 for storing a wheel tooth meshing lock portion 54 that moves up and down and a pressing spring 543 is disposed above the wheel bearing portion 511. The fitting part 512 of the twin-wheel caster 4 including the storage part 515 and the turning support part 52 are firmly supported in a freely rotatable manner, but the turning support part 52 is firmly fixed to the caster mounting bracket 55 side.
In addition, the storage part 513 has an opening on the lower side and one side (a dust cover may be provided if necessary), which is fixed to the caster mounting bracket 55 during assembly work. The turning support washer 523 and the stopper (fixed snap ring) 524 are attached so that the turning support portion 52 to be rotated can be freely rotated on the fitting portion 512.
After the swivel support part 52 is inserted into the fitting part 512, a swivel auxiliary washer 523 is inserted into the lower end of the swivel support part 52, and a stopper (fixed snap ring) 524 provided at the lower end of the swivel support part 52 The snap ring 524 is locked to the fixed circumferential groove 525 for the snap ring so as to fix the turning support portion 52 so that the lock mechanism frame 51 does not fall out of the turning support portion 52.

  Further, a base portion 541 of the wheel tooth meshing lock portion 54 is attached to the lower end portion of the knock member 531 of the knock portion 53, and this base portion 541 is shown in FIG. The lower horizontal portion 5411, the upper horizontal portion 5412, and a connecting portion 5413 that connects the lower horizontal portion 5411, the upper surface of the lower horizontal portion 5411 is the lower tip of the knock member 531 The upper horizontal portion 5412 is engaged with the upper end portion of the spring 543 that is pressed and pressed outward so that the tooth portion 542 is fixed to the upper horizontal portion 5412. An upper spring engaging portion 544 is provided. The lower end portion of the pressing spring 543 engages with the lower spring engaging portion 545 provided on the lock mechanism frame 51 side, and the upper spring engaging portion 544 on the lower surface of the upper horizontal portion 5412 is always pressed upward. Yes.

(Swivel support part and knock part)
Next, the fitting part 512, the turning support part 52, and the knock member 531 in FIG. 11 will be described.
The fixed support cylinder member 521 of the turning support portion 52 is a metal cylinder (pipe), and its upper end is fixed to the bottom plate 554 of the metal caster mounting bracket 55 by welding or the like. Here, as shown in FIG. 9, the turning of the twin wheel caster 4 means that the vertical line of the ground contact point X2 of the normal twin wheel caster 4 and the ground contact point X1 of the shaft center of the knock member 531 are eccentric. When the walker / movable chair 1 is moved, the traveling direction of the twin-wheel caster 4 is automatically set to the moving direction. Naturally, when the twin-wheel caster 4 is locked, the twin-wheel caster 4 rotates. By doing so, turning is prevented, but conversely, when the walker / movable chair 1 is not in a locked state, it must be freely turned. Therefore, a protruding wheel 514 is interposed between the turning support portion 52 and the bottom plate 554 of the caster mounting bracket 55 so that the turning on the upper surface of the lock mechanism frame 51 is smooth.
The swivel support part 52 constitutes the swivel shaft of the caster and fits and stores a knock member 531. The knock part 53 can freely move up and down by the concentric fitting part 512 of the swivel support part 52. It is mated.

(Wheel tooth meshing lock)
As shown in FIG. 15, the base portion 541 has a U-shaped cross section of the base portion 541 (inverted U-shape from the opposite side) at the central portion (in FIG. 14) of the lower surface of the upper horizontal portion 5412. An upper spring engaging portion 544 that locks the upper end of the pressing spring 543 is provided, and a pair of two tooth portions 542a on the left and right so as to be fitted to the internal gears 45 of the pair of wheel portions 41 of the twin-wheel caster 4. , b are fixed, and are configured to always push upward by a pressing spring 543 that presses outward.
Therefore, as shown in FIGS. 10 and 12, the tooth portions 542a and b of the wheel tooth meshing lock portion 54 are always pushed upward by the pressing spring 543 and lifted unless the knock member 531 is regulated. In the normal case where the walker / movable chair 1 is installed in the vicinity of the bed, the tooth portions 542a and 542b are fitted to the internal gear 45 of each twin wheel caster 4 by the pressing spring 543 to rotate the twin wheel caster 4. It is blocked and locked, making it impossible for the walker / mobile chair 1 to move.
In addition, the vertical movement of the wheel tooth meshing lock portion 54 is lowered and raised along the side wall of the guide groove 516 of the storage portion 515 of the wheel tooth meshing lock portion 54 provided in the lock mechanism frame 51.
Further, a concentric internal gear 45 is formed on the wheel shaft 42 in the vicinity of the outer ring 44 inside the wheel portion 41 of the twin-wheel caster 4, and when the tooth portions 542 a and b rise, the tooth portions 542 are formed on the internal gear 45. Prevents the wheel 41 from rotating.

(Caster mounting bracket and slider cam)
The slider cam 56 for operating the caster mounting bracket 55 and the knock member 531 in FIGS. 13 to 16 will be described.
The lever connecting wire 31 is pulled by the operation of raising the operation lever 21 (see FIG. 4) of the caster operation unit 2, and the four branch wires 33 are also pulled by the wire branch board 32. Furthermore, the inner wire 332 of each of the branch wires 33a, 33b, 33c, and 33d is pulled, but this has a slider-like cam mechanism attached to the caster mounting bracket 55 that converts this into movement of the knock portion 53. This is a slider cam 56.
As shown in FIG. 16, the slider cam 56 is mainly provided with a cam surface 561 whose flat shape is flat and whose lower surface is inclined, and an end portion 331 of the branch wire 33 is provided at one end in the direction in which the slider cam 56 moves. Are attached to the front plate 551 of the caster mounting bracket 55 (see FIG. 14), and the lever fixing wire 31 and the branch wire 33 (33a, 33b, 33c, 33d: see FIGS. 11 and 16) As a result, the entire body is moved horizontally. As shown in FIGS. 13, 14, and 16, a guide elongated hole 564 is provided in the center portion in parallel with the horizontal upper surface 563 of the slider cam 56, and both side plates of the caster mounting bracket 55 are provided in the guide elongated hole 564. A guide shaft 565 fixed to 552 is fitted.

One end of the coil spring 567 in the contracting direction is locked to the locking portion 566 opposite to the locking portion 562, and the other end of the coil spring 567 is locked to the locking portion 568 of the back plate 553 of the caster mounting bracket 55. The coil spring 567 returns the slider cam 56 to the position shown in FIG. 12 when the lever connecting wire 31 and the branch wire 33 are relaxed. Further, as shown in FIG. 14, the axis of the guide shaft 565 intersects with the axis of the upper tip 532 of the knock member 531.
In FIG. 14, frame body mounting portions 555 are provided on both side plates 552 of the caster mounting brackets 55 (4 in total), and bolts (not shown) are provided at both ends of the caster frame bodies 132a and 132b. Etc.) and so on.

Accordingly, the upper end 532 of the knock member 531 comes into contact with the cam surface 561 of the slider cam 56. However, in the unlocked state where the branch wire 33 is pulled, as shown in FIGS. Since the cam surface 561 moves from the left side to the right side, the cam surface 561 is at the lowest point 5611 which is the lowest position, and the knock member 531 is pushed downward.
On the contrary, as shown in FIGS. 11 and 12, when the lever connecting wire 31 and the branch wire 33 are relaxed, the slider cam 56 is moved to the left side by the coil spring 567 as shown in FIGS. The cam surface 561 is at the highest point 5612 which is the highest position, and by the action of the pressing spring 543 of the tooth portion 542, the upper end portion 532 of the knock member 531 is also raised, and the tooth portion 542 is also raised, The inner wheel 45 of the caster 4 is fitted, and the twin-wheel caster 4 is maintained in a locked state.
This flat slider cam 56 operates so that the uppermost point 5612 moves from the lowermost point 5611 of the cam surface 561 to the upper end portion 532 of the knock member 531, but the end portion 331 of the branch wire 33 of the slider cam 56 The movement distance Z (see FIG. 11) is substantially the same as the distance Y (see FIG. 16) from the lowest point 5611 to the highest point 5612 of the cam surface 561.
Therefore, the distance from the lowest point 5611 to the highest point 5612 can be changed by the inclination angle of the cam surface 561, so that the height of the caster mounting bracket 55 is kept low and the distance (stroke) of the branch wire 33 is adjusted. Can do.

(Caster lock / unlock operation)
Since the terminal operating device for fixing the walker / movable chair 1 of the present embodiment has the above-described configuration, it operates generally as follows.
As shown in FIG. 1 (FIG. 2), the operation lever 21 for unlocking the caster 4 (also used for lifting the table) provided on the base portion 11 of the walker / moving chair 1 is configured so that the caster 4 can be When the walker / moving chair 1 is locked, the operation lever 21 for maintaining the release is lifted upward to release the lock of the caster 4 as shown in FIG. 3 (FIG. 4).
In order to set the caster 4 of the walker / movable chair 1 to the original locked state and fix the height of the table portion 11, release the operation lever 21 from the hand, the spring in the table lifting mechanism 23, and the lock in the caster 4. Due to the spring of the pulling force of the wire by the mechanism, the operation lever 21 is naturally lowered and the table portion 11 is fixed and the twin wheel caster 4 is locked.

[Lock state of twin wheel caster]
The locked state of the twin wheel caster 4 is as shown in FIG.
In a normal state in which the walker / moving chair 1 is disposed at a proper place in the hospital room or near the bed, the operation lever 21 is automatically positioned below (see FIG. 4).
As a result, the branch wire 33 has the tooth portion 542 fitted to the caster internal gear 45 by the pressing spring 543 in the caster, the knock member 531 is also above the pressing spring 543, and the branch wire 33 is also in a relaxed state. Although the state in this case lasts for a long time, it is not necessary to keep the operation lever 21 in a state where the wire 31 is always pulled, so that each wire is not in a tensioned state (relaxed state), and the wire stretches over time. And the maintenance of the device becomes easy.
[Unlocking condition of twin wheel caster]
The unlocked state of the twin-wheel caster is as shown in FIG.
In this case, in the state where the walker / movable chair 1 is moved, the operation lever 21 is raised, the lever connecting wire 31 is pulled up to be in a tensioned state, and the knock member 531 is pushed downward by the branch wire 33. Against the pressing spring 543 in the caster, the tooth part 542 is released from the internal gear 45 of the caster. Therefore, in the state where the operation lever 21 is raised, the two-wheel caster is in the unlocked state, and the walker / mobile chair 1 can be moved.

Since the present embodiment is configured as described above, in the walker / movable chair 1 used as a walker or a movable chair, the operation lever that can be operated to lock / unlock the casters at once is walked. Since it is arranged near the upper end of the backrest part 122 of the portable chair for genital function 1, it can be arranged in the vicinity of the gripping part used as a walker, and it can be designed neatly without interfering with medical practice. Become.
Further, since the caster operation lever 21 for locking / releasing casters is provided in the vicinity of the gripping portion, the operation portion of the walking chair / movable chair 1 can be concentrated, and the user is less confused by the operation. In addition, since the caster operation lever 21 is provided in the walker unit 14 of the walker / movable chair 1, the caster operation lever 21 that is close to the user can be easily used to lock / release the casters at a time. Becomes simple and completes the operation once.
In this way, all casters of the walker / movable chair 1 can be locked and released in a single operation, and there is no need to lock each caster as in the prior art. The caster operation unit 2 is provided in the walker / movable chair 1 so that the patient and nurse can easily operate the walker / movable chair 1 and the caster lock / release operation once. Can finish with.

In addition, since the operation transmission mechanism 3 using the operation transmission wire 30 is used for the lock / release operation of the casters, unlike the conventional link mechanism combination, the structure is simple, the production cost is low, and the number of parts is small. Therefore, maintenance is facilitated, and one operation wire is branched into four and used, so that the four casters can be accurately and simultaneously locked and released with a very simple configuration.
Furthermore, since the height of the wire branching mechanism can be made small and thin, it is not necessary to make the base part 11 high or thick even if it is provided on the back surface of the base part 11, and there is no restriction in terms of design, and a neat design is possible. The length of the branch wire 33 up to the caster can be set freely, and the caster can be locked and unlocked uniformly.

Further, since the lock and unlock operation mechanism of the twin-wheel caster 4 is unlocked when the handle 21 of the operation mechanism is gripped, it is normally in a locked state, so that it can be used as a visitor chair. If necessary, the walker and wheelchair can be moved at all times.
Furthermore, in recent years, patients and the like are proceeding to eliminate portable toilets in hospitals to prevent bedside falls. However, by eliminating portable toilets, nurses are often referred to as patient toilet assistance, but by using what is normally used as a chair, it becomes a nursing aid. The attendance of the teacher can be reduced, resulting in reduced work.
In addition, since the gripping rods are arranged in two steps and are stretched over the left and right sides, it is possible to appropriately cope with different heights of the back. Since the caster operation lever is located below the lower gripping rod, there is a lower gripping rod when grasping as a starting aid, so when touching the hand, touch the lower gripping rod to Since it does not need to be touched, it is possible to prevent malfunctions such as unlocking the casters of the walker / moving chair.
Further, the upper gripping bar 16 is disposed at a slightly higher position on the backrest portion 122 and is fixed so that the height position can be adjusted as necessary, and is appropriately adjusted to an appropriate height for a user such as a patient or a nurse. It will be easy to operate.

Further, since the side plate 17 of the walker / movable chair 1 is provided with a cover portion 171 of a caster that hides the twin-wheel caster 4 and is covered with the cover so as not to be exposed to the outside, clothes and the like are not involved in the wheels. , The large wheels and casters are barely exposed as before, and it is not like a wheelchair, it can be designed neatly, the appearance for visitors can be improved, and it can be used as a chair for visitors .
In addition, as the walker, the gripping rods are arranged in two steps and spanned to the left and right sides, so that it is possible to appropriately cope with different heights of the back.
In addition, since the attachment part which attaches an infusion stick was provided in the appropriate place of the walker part 14 or the armrest part 123 walker / combined movement chair 1, it can be set as the infusion stick which cannot fall easily.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired.

1. Transfer chair for walker
11. ・ Casting base part,
12 .. Chair part, 121 ... Cushion part, 122 ... Backrest part, 123 ... Armrest part,
13.Legs
14 .... Walker part, 15 .... Lower gripping rod (grip), 16 .... Upper gripping rod (grip)
17,17a, 17b ... Side plate,
171 ... Caster cover part, 172 ... Grip part (caster operation part) mounting column part
18 ... Drip part mounting member,
2 ・ Caster operation part,
21, ・ Caster operation lever, 211 ・ ・ Rotating stopper stopper,
212 .. Lock holding latch
22 ・ ・ Rotating shaft, 23 ・ Wire end (ball) locking part, 24 ・ ・ Wire guide pulley,
25 ・ ・ Wire covering (outer circumference) locking part, 26 ・ ・ Rotating stopper
27 ・ ・ Caster unlock release lever, 28 ・ ・ Case,
3. Operation transmission mechanism, 30 (31, 32, 33) Operation transmission wire
31,31a, 31b ... Lever connecting wire, 311,311a, 311b ... Terminal part,
312 ... Inner wire, 313 ... Cover (outer wire),
314 ・ ・ Mounting fixing part,
32 ... Wire branch board, 321 ... Lid, 3211 ... Guide groove,
3212 ・ ・ Fixed convex part, 322 ・ ・ Slider,
3221 ・ ・ Fitting part, 32211 ・ ・ Semi-cylindrical part, 32212 ・ ・ Through groove,
3223 ... Yamabe, 323a, 323b ... Side plates,
33 (33a, 33b, 33c, 33d) ・ ・ Branch wire,
331,331a, 331b ... Terminal, 332 Inner wire,
333 ... Coating part (outer wire), 334 ... Installation fixing part,
4, 4a, 4b, 4c, 4d · Twin wheel casters,
41 ・ ・ Wheel, 41A, 41B ・ ・ Wheel,
42 .. Wheel axle, 43 .. Wheel axle fixing part, 44 .. Outer ring, 45 .. Internal gear,
5. Wheel lock mechanism,
51 ··· Lock mechanism frame, 511 · · Wheel bearing portion, 512 · · Fitting portion,
513, 515 ... Storage part, 514 ... Projection ring, 516 ... Guide groove,
52 .. Rotation support part, 521 .. Fixed support cylinder member, 522 .. Mounting edge part,
523 ・ ・ Swivel auxiliary washer, 524 ・ ・ Stopper (fixed snap ring),
525 ・ ・ Fixed circumferential groove for snap ring,
53 .. Knock part, 531 ... Knock member, 532 ... Upper tip part, 533 ... Lower tip part,
54 .. Wheel tooth meshing lock part, 541 .. Base part,
5411 ... Lower horizontal part, 5412 Upper horizontal part,
5413 ・ ・ Connecting part, 542,542a, 542b ・ ・ Tooth part, 543 ・ ・ Pressing spring,
544 ... Upper spring engagement part, 545 ... Lower spring engagement part
55 ・ ・ Caster mounting bracket, 551 ・ ・ Front plate, 552 ・ ・ Side plate (side),
553 ... Back plate, 554 ... Bottom plate, 555 ... Frame body mounting part, 556 ... Bolt hole,
56 ・ ・ Slider cam, 561 ・ ・ Cam surface, 5611 ・ ・ Bottom point, 5612 ・ ・ Top point,
562, 566, 568 ... Locking part, 563 ... Horizontal upper surface, 564 ... Guide slot
565 ・ ・ Guide shaft, 567 ・ ・ Coil spring,

Claims (2)

A walker / moving chair provided with a plurality of swivelable casters in the front, rear, left and right of the base,
It said base portion is provided a walker unit and the seat part in Rutotomoni, placing the grip portion of the walking dexterity on the back of the chair portion,
The gripping part spans almost the entire width of the chair part. The gripping bar is stretched to the left and right side parts. The gripping bar spans the left and right side parts and casts on the lower part of the lower gripping bar. Along with the lever, the upper gripping bar can be adjusted in height,
The caster operation lever operates an operation mechanism so that all casters can be locked and unlocked simultaneously, and the operation mechanism releases the lock of the caster when the caster operation lever is gripped.
A walker / moving chair, wherein the caster is provided with a cover so that the caster is not exposed to the outside . The walker / moving chair according to claim 1 , wherein the walker part or the chair part is provided with an attachment part for attaching an infusion rod.

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