JPH0745393Y2 - Wheelchair fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fixing device for fixing a wheelchair on various floors such as a floor of a vehicle.

(Prior Art) A number of devices for fixing a wheelchair on a floor such as a floor of a vehicle while a person is seated have already been proposed, for example, JP-A-60-92754 and JP-B-60-52010. It is disclosed in Japanese Utility Model Publication No. 61-10267.

(Problems to be solved by the invention) In a wheelchair fixing device, it is most important that the wheelchair can be firmly and firmly fixed on the floor. However, the wheelchair is fixed and released. For this reason, it is important that the seated person and the assistant can easily perform the operation in a comfortable posture and that the wheelchair is versatile enough to be used in various wheelchairs. Therefore, it is an object of the present invention to provide a fixing device for a wheelchair that can address these problems.

(Means for Solving the Problems) A fixing device for a wheelchair according to the present invention includes a pair of links, one end of which is rotatably assembled to a predetermined portion of a floor, and the other ends of these links. A first connecting member that is connected to form a parallel link and moves up and down by the rotation of both links, and one end of the first connecting member is rotatably assembled and the other end is movable to the floor. A second connecting member mounted on the first connecting member, a driving means for moving the other end of the second connecting member to rotate the parallel link, and a first connecting member provided above the first connecting member. It is characterized in that it is provided with an engaging means which engages with an engaged portion provided in a lower portion of the vehicle body of the wheelchair and moves a downward urging force to the vehicle body when moving downward from the vehicle body.

(Operation and Effect of the Invention) In the fixing device having such a configuration, the second connecting member moves on the floor at the other end to rotate the parallel link by operating the driving means, and the parallel link is formed during this. The first connecting member that moves moves up and down. When the first connecting member moves from the upper side to the lower side, the engaging means provided on the first connecting member engages with the engaged portion provided on the vehicle body of the wheelchair,
Further downward movement of the connecting member is restricted, and as a result, a large downward biasing force is applied to the vehicle body. Therefore, the pair of left and right wheels of the wheelchair and the pair of left and right casters are strongly pressed against the floor, and the wheelchair is securely and firmly fixed on the floor. In order to release the fixation of the wheelchair in this fixed state, the other end of the second connecting member may be moved in the opposite direction to the above to move the first connecting member slightly upward. The engagement of the engaging means with the engaged portion on the wheelchair side is released.

Thus, in the fixing device, various known driving means such as electric type, hydraulic type, pneumatic type, etc. can be adopted as the driving means, and thereby these driving means can be operated remotely. By arranging the operation switches, operation levers, etc. for driving these means at the desired positions where the seated person and the assistant of the wheelchair can easily operate, it is extremely easy to fix and release the wheelchair in a comfortable posture. Can be Further, in the fixing device, by providing the engaged portion in the lower portion of the vehicle body of the wheelchair, it can be used regardless of the type of wheelchair. In this case, if the engaged portion is formed of a member (engaged member) different from the vehicle body of the wheelchair, and the position is adjustable between the wheels and casters of the frame constituting the vehicle body, The versatility of the fixing device can be further enhanced.

(Embodiment) The present invention will be described below with reference to the drawings. FIG. 1 shows the relationship between a fixing device and a wheelchair according to an embodiment of the present invention. The fixing device is housed in each of the recesses f _{1 to} f ₃ provided on the floor shown in FIG. 2 and operates as shown in FIGS. 3 and 4. Thus, the fixing device is composed of the parallel link 10a, the operating mechanism 10b and the engaging mechanism 10c. The parallel link 10a is provided with a pair of front and rear links 11a and 11b on the left and right, respectively, and one end of each of the links 11a and 11b is assembled on the floor so as to be rotatable in the front-rear direction with a predetermined interval in the front-rear direction. . The other end of each of the pair of links 11a, 11b on the left side of each link is rotatably assembled to the front and rear parts thereof at the left end of the connecting plate 12, and each of the pair of links 11a on the right side. The other end of 11b is a connecting plate 12.
It is rotatably attached to the front and rear parts at the right end of the. The connecting plate 12 corresponds to the first connecting member of the present invention, and a pair of left and right links 11a and 11b and a pair of right and left links 11a and 11b respectively form a pair of left and right parallel links 10a. .

As shown in FIGS. 5 to 8, the operating mechanism 10b includes a pair of left and right connecting arms 13 that are second connecting members, uppers that are slide rails, both lower rails 14a and 14b, and rod-shaped screws that are drive means. Member 15a, nut member 15b, electric motor 15
It is composed of c and the operation switch 15d. Each connecting arm is composed of two arms 13a and 13b, and one end of the first arm 13a is rotatably connected to the front end of the connecting plate 12,
The other end of the second arm 13b is rotatably connected to the left and right sides of the bracket 14c fixed to the upper rail 14a. In addition, the connecting pin 1 provided on the other end of the first arm 13a
3c is a long hole 13d provided in the middle of the second arm 13b in the longitudinal direction.
The first arm 13a is connected to the other end of the first arm 13a so as to be rotatable and movable in the longitudinal direction with respect to the second arm 13b. The left and right second arms 13b are connected by a connecting rod 13e and rotate integrally with each other. The relative rotation of the first and second arms 13a and 13b causes the connecting pin 13c to have a long hole 13d.
When they are located at the rear end, they extend in the same direction as shown in FIGS. 2 to 5, and when both arms 13a and 13b rotate relative to each other, they are shown in FIG. 6 and FIG. It becomes a state. A coupling means is provided between the both arms 13a and 13b. The coupling means includes an engaging rod 13f provided on the connecting plate 12, an engaging hook 13g provided on the first arm 13a, an engaging hook 13h provided on the second arm 13b, and an engaging pin 13i, and the engaging rod 13f. By engaging the engagement hook 13h with the engagement pin 13i and the engagement hook 13g with each other, the arms 13a and 13b are coupled with each other with a predetermined force.
It is in a state of extending in the same direction as shown in FIGS.
In this combined state, as shown in FIG.
When is inserted between the connecting rod 13e and the engaging rod 13f and rotated by a predetermined force, the engaging portions are separated from each other, and the arms 13a and 13b are released from the coupling as shown in FIG. Upper rail 14
The a is fitted to a lower rail 14b fixed on the floor so as to be movable in the front-rear direction, and a screw member 15a is rotatably supported on the outer side of the lower rail 14b and extends in the front-rear direction. The nut member 15b is attached to the bracket 1 as shown in FIG.
It is fixed to 4c and is screwed to the screw member 15a so as to be able to move forward and backward. The motor 15c rotates the screw member 15a in the forward and reverse directions by switching the operation switch 15d to rotate the screw member 15a in the forward and reverse directions. ,
In addition, when reversing, these 15b, 14c and 14a are moved forward.

The engaging mechanism 10c is composed of a pair of right and left engaging members 16 and an engaged member 17, and the engaging member 16 has a plate shape as shown in FIG. It has a recess 16a. Engaging recesses 16a is made of and covering the circular recess 16a ₂ leading to the rear end of the inlet 16a ₁ an inlet 16a ₁ to gradually expanded to the front side at the cover plate 16a _3, a cover plate 16a ₃ is equipped with an inlet 16a ₄ that gradually expands to the front end side. As shown in FIG. 10, the engaging member 16 includes bolts 16b at the left and right ends of the connecting plate 12 of the parallel link 10a,
It is tightened and fixed by a nut 16d fixed to the retainer 16c. Each bolt 16b is connected plate via spacer 16e
The engaging members 16 are inserted through the elongated holes 12a of the twelve, and the positions of the engaging members 16 can be adjusted in the left-right direction. The engaged member 17 includes a mounting bracket 17a and an engaged portion extending from the lower surface thereof,
The rod portion 17b that constitutes the engaged portion is sized to insert the respective inlets 16a ₁ and 16a ₄ of the engagement recess 16a, and the disc portion 17c is sized to fit into the circular recess 16a _2. Has been formed. The engaged member 17 is attached to the vehicle body frame of the wheelchair 20 by the attachment bracket 17a. The engaged member 17 is provided on the lower frame 21 that extends in the front-rear direction on the left and right of the vehicle body frame.
It is attached to an intermediate portion between the caster 23 and the caster 23 and is positioned so that it can be engaged with and disengaged from the engaging recess 16a of the engaging member 16.

In the fixing device 10 having such a configuration, when not in use the first and second arms 13a, 13b is housed in the recess f ₁ ~f ₃ of the vehicle floor as shown in FIG. 2 in a state of being mutually coupled There is. Then, when fixing the wheelchair 20, as shown in FIG. 1, the wheelchair 20 is carried in and stopped at a predetermined position slightly ahead of the position where the engaging member 16 engages with the engaged member 17. Then, the operation switch 15d is operated to normally rotate the electric motor 15c. As a result, the upper rail 14a is moved rearward and the parallel link 10a is rotated rearward through the connecting arm 13 as shown in FIGS.
The connecting plate (12) forming a is moved upward to be positioned behind the engaged member (17) on the wheelchair (20) side. Next, when the assistant or the seated person moves the wheelchair 20 slightly rearward, the engaging members 16 provided on both sides of the connecting plate 12 are fitted into the opposite engaged members 17 at the engaging recesses 16a. To meet. After that, when the operation switch 15d is switched and the motor 15c is rotated in the reverse direction,
The upper rail 14a moves forward to rotate the parallel link 10a forward, thereby moving the connecting plate 12 downward. As a result, each engaging member 16 is engaged with each engaged member 17 at the engaging recess 16a.
Securely and firmly engaged with the wheelchair 20, and transmits a large downward urging force to the wheelchair 20. This allows the wheels 22 of the wheelchair 20 to
Both casters 23 are strongly pressed onto the floor, and the wheelchair 20
Is securely and firmly fixed on the floor. To unlock the wheelchair 20 normally, the operation switch 15d and the wheelchair 20 may be operated in the reverse of the above-described fixing operation.
FIG. 11 shows the operation principle of the fixing device 10 according to the present embodiment in a skeleton, and normally, the respective constituent members operate as indicated by arrows to fix and release the wheelchair. on the other hand,
When the drive system is out of order, the drive system cannot be operated, or when the user wants to quickly release the fixation of the wheelchair, the release bar A is used to rotate as shown in FIG. As a result, both arms 13a and 13b that form the connecting arm 13 are
As shown in FIG. 7 and FIG. 7, the coupling is released from each other, and the state where the drive system can freely rotate is obtained. As a result, the parallel link 10a can be freely moved up and down by hand, and the wheelchair 20 can be easily unlocked by moving the parallel link 10a slightly upward.

Thus, in the fixing device, the wheelchair 20 can be fixed and released by the switching operation of the operation switch 15d, but the operation switch 15d can be freely moved to a desired position where the seated person and the assistant can easily operate. Since they can be arranged, the operation of fixing and releasing the wheelchair 20 is extremely easy. The fixing device 10 is basically a parallel link 10
a, which consists of the operating mechanism 10b and the engaging mechanism 10c, has a simple structure, and can be used as a fixing device for many wheelchairs 20 by assembling the engaged member 17 to the wheelchair 20. You can

In the fixing device according to the present invention, as shown in the above-mentioned embodiment, the second connecting member is composed of the connecting arm 13 including the first and second arms 13a and 13b, and both arms are formed. 13a and 13b are rotatably and movably connected, both arms 13a and 13b are releasably connected, and
If the arm 13b is releasably connected to the side of the connecting plate 12 which is the first connecting member, both arms 13a, 13b
Parallel link 10a
Can be freely moved up and down by hand separately from the driving means, and it is necessary to urgently release the fixation of the wheelchair, and to deal with the case of releasing the fixation of the wheelchair when the drive system fails. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing a relationship between a fixing device and a wheelchair according to an embodiment of the present invention, FIG. 2 is a perspective view showing a stored state of the device, and FIGS. 3 to 7 are operations of the device. FIG. 8 is a perspective view showing a state, FIG. 8 is an enlarged vertical sectional view taken along the line VIII-VIII of FIG. 1, FIG. 9 is an enlarged perspective view of the engaging member, and FIG. FIG. 11 is a skeleton diagram for explaining the principle of the fixing device according to the present invention. Explanation of symbols 10a ... Parallel link, 10b ... Operating mechanism, 10c ... Engaging mechanism, 11a, 11b ... Link, 12 ... Connecting plate, 13 ...
Connecting arm, 13a ... first arm, 13b ... second arm,
13f ... Engaging rod, 13g, 13h ... Hook, 13i ... Engaging pin, 14a, 14b ... Rail, 15c ... Motor, 16 ... Engaging member, 16a ... Engaging recess, 17 ... … Engagement member, 20 ……
Wheelchair, 21 …… lower frame, 22 …… wheel, 23 …… caster.

Claims (1)

[Scope of utility model registration request] 1. A pair of links, one end of which is rotatably assembled to a predetermined portion of a floor, and the other ends of both of these links are connected to each other to form a parallel link. A first connecting member that moves up and down by a second connecting member that has one end rotatably assembled to the first connecting member and the other end movably assembled to the floor; A driving means for moving the other end of the connecting member to rotate the parallel link; and a first connecting member provided on the first connecting member.
A wheelchair fixing device, comprising engaging means for engaging an engaged portion provided on a lower portion of a vehicle body of a wheelchair and moving a downward biasing force to the vehicle body when the connecting member is moved from above to below.