JPH0525610Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fixing device for fixing a wheelchair on various floors such as a vehicle floor.

(Prior art) Many devices for fixing a wheelchair to the floor of a vehicle while a person is seated have already been proposed. It is disclosed in Publication No. 61-10267.

(Problem to be solved by the invention) By the way, in such a fixing device, the most important thing is to securely and firmly fix the wheelchair on the floor, but in order to fix the wheelchair and release the fixation, The operation by the seated person and the assistant is easy, and the structure of the device is simple.
It is also important that it is highly versatile and can be used in various types of wheelchairs. Considering these points and referring to the fixing devices shown in the above publications, each fixing device has the following problems: the fixing operation is complicated, and the fixing and releasing operations are performed bending down. However, it has at least one problem, such as being required to use a wheelchair, having an extremely complicated structure, and being limited in versatility because it is designed for a specific wheelchair.

Therefore, an object of the present invention is to solve the above-mentioned problems in a wheelchair fixing device.

(Means for Solving the Problems) A wheelchair fixing device according to the present invention includes a pair of links, one end of which is rotatably attached to a predetermined portion of the floor, and the other ends of these links are connected to each other. a first connecting member that is connected to form a parallel link and moves up and down as the two links rotate, and a first connecting member that is rotatably attached to the parallel link at one end and movably attached to the floor at the other end. a second connecting member attached thereto; a drive means for moving the other end of the second connecting member to rotate the parallel link;
an engaging means provided on the connecting member that engages with the engaged portion of the lower part of the vehicle body to transmit a downward biasing force to the vehicle body when the connecting member moves from above to below, and the driving means The driving source is fluid pressure.

(Operations and Effects of the Invention) In the fixing device configured as described above, the other end of the second connecting member is moved by operating the drive means to rotate the parallel link, and during this time the first connecting member constituting the parallel link is rotated. Move up and down. When this first connecting member moves downward from above, the engaging means provided on the connecting member engages with the engaged portion of the body of the wheelchair, thereby preventing further downward movement of the connecting member. As a result, a large downward biasing force is applied to the vehicle body. Therefore, the pair of left and right wheels and the pair of left and right casters of the wheelchair are strongly pressed against the floor, and the wheelchair is securely and firmly fixed on the floor. In addition, in order to release the fixation of the wheelchair in such a state, it is sufficient to move the other end of the second connecting member in the opposite direction to the above and move the first connecting member slightly upward. The engagement of the coupling means with the vehicle body-side engaged portion is released.

However, in this fixing device, since the driving source of the driving means is fluid pressure, a fluid pressure cylinder can be used as the driving means and remote control can be performed.
By arranging the operation switch and the operation lever at desired positions that are easy for the seated person and the assistant to operate, it becomes extremely easy to fix and release the wheelchair. Further, by connecting the above-described fluid pressure cylinder to the second connecting member, the structure of the drive mechanism becomes simple, and the structure of the device becomes simple. Furthermore, by providing the engaged portion at the lower portion of the vehicle body side of the wheelchair, the fixing device can be used regardless of the type of wheelchair. In addition, it is preferable that the engaged part is formed of a separate member (engaged member) from the vehicle body of the wheelchair, and is assembled so as to be adjustable in position between the wheels and casters of the frame that constitutes the vehicle body. This results in
The versatility of the fixing device can be further improved.

(Example) The present invention will be explained below based on the drawings.
The figure shows the relationship between a fixing device and a wheelchair according to an embodiment of the present invention. The fixing device 10 is the second
They are housed in recesses f ₁ to _{f 3} provided under the floor shown in the figure, and operate as shown in FIGS. 3 to 5.

Thus, the fixing device 10 includes parallel links 10a,
It is composed of an operating mechanism 10b and an engagement mechanism 10c. The parallel link 10a is provided with a pair of front and rear links 11a, 11b on the left and right, and one end of each link 11a, 11b is assembled so as to be rotatable in the front and rear direction with a predetermined interval maintained in the front and rear. The other ends of the links 11a and 11b are the first
The left and right ends of the connecting plate 12, which is a connecting member, are rotatably attached to the front and rear parts.

The operating mechanism 10b includes a pair of left and right connecting arms 13a, 13b which are second connecting members, upper and lower rails 14a, 14b which are slide rails, a hydraulic cylinder 15a which is a driving means, and a hydraulic motor 15.
b, and an operation switch 15c. Each of the connecting arms 13a, 13b is rotatably connected at one end to the front end of the connecting plate 12, and at the other end to the left and right sides of a bracket 14c fixed to the lower rail 14a. has been done. The lower rail 14b is fitted into an upper rail 14a fixed on the floor so as to be movable in the front and back direction. The bracket 14c is attached to both rails 14.
a, 14b, and the tip of the piston rod of the hydraulic cylinder 15a is connected to this protrusion. The hydraulic motor 15b selectively supplies and discharges oil to and from both oil chambers of the hydraulic cylinder 15a by switching the operation switch 15c.
The bracket 14c and the lower rail 15b integrated therewith are moved in the front-rear direction.

The engagement mechanism 10c consists of a pair of left and right engagement members 16 and an engaged member 17, and the engagement member 16 has a plate shape as shown in FIG. 6, and has an engagement member opening forward at its outer end. A recess 16a is provided. The engagement recess 16a is an introduction port 16 that gradually expands toward the front end side.
a ₁ and the circular recess 16a ₂ communicating with the rear end of the inlet 16a ₁
and is covered with a cover plate 16a ₃ , and the cover plate 16a ₃ is provided with an introduction port 16a ₄ that gradually expands toward the front end side. As shown in FIG. 7, this engaging member 16 is provided with bolts 16 at each left and right end of the connecting plate 12 of the parallel link 10a.
b. It is fixed with a nut 16d fixed to the retainer 16c. Each bolt 16b has a spacer 16
The engagement members 16 are inserted through the elongated holes 12a of the connection plate 12 through the bolts 16b, and the positions of the engagement members 16 in the left-right direction can be adjusted by the action of the bolts 16b. The engaged member 17 consists of a mounting bracket 17a and an engaged portion extending from its lower surface, and the rod portion 17b constituting the engaged portion is connected to each inlet 1 of the engagement recess 16a.
6a ₁ and 16a ₄ , and the disc part 1
7c is formed in a size that fits into the circular recess _16a2 . The engaged member 17 is attached to the body frame of the wheelchair 20 by a mounting bracket 17a. The engaged member 17 is assembled in a lower frame 21 that extends back and forth on the left and right sides of the vehicle body frame at a position intermediate between the wheel 22 and the caster 23, and is engaged with and disengaged from the engagement recess 16a of the engagement member 16. Located to get.

When the fixing device 10 having such a configuration is not in use, it is stored in recesses f ₁ to _{f 3} in the vehicle floor, as shown in FIG. 2. When fixing the wheelchair 20, as shown in FIG. Then, by operating the operation switch 15c, the hydraulic motor 1
5b is driven. As a result, the lower rail 14
b moves rearward, rotates the parallel link 10a rearward via the connecting arms 13a and 13b as shown in FIGS. 3 and 4, and moves the connecting plate 12 constituting the parallel link 10a upward. wheelchair 2
It is located behind the engaged member 17 on the 0 side. Next, when the assistant or the seated person moves the wheelchair 20 slightly backwards, each of the engaging members 16 provided on both sides of the connecting plate 12 engages the opposing engaged members 1.
7 in the engagement recess 16a. Thereafter, when the operating switch 15c is operated to switch and drive the hydraulic motor 15b, the lower rail 14b moves forward, rotates the parallel link 10a forward, and moves the connecting plate 12 forward and downward. As a result, each engaging member 16 is inserted into each engaged member 1 in the engaging recess 16a.
7 and transmits a large downward biasing force to the wheelchair 20. As a result, both wheels 22 and both casters 23 of the wheelchair 20 are strongly pressed onto the floor, and the wheelchair 20 is securely and firmly fixed onto the floor. In addition, in order to release the fixation of the wheelchair 20, the operating switch 15c and the wheelchair 20 may be operated in the opposite direction to the fixing operation described above.

In this manner, in the fixing device, the wheelchair 20 is fixed and unfixed using the operating switch 15c.
However, since the operating switch 15c can be freely placed at a desired position that is easy for the seated person and the assistant to operate, the wheelchair 2
0 fixing and release operations are extremely easy. Moreover, the fixing device 10 basically consists of parallel links 1
0a, an operating mechanism 10b, and an engagement mechanism 10c, the structure is simple, and in particular, the drive mechanism is simple because a hydraulic cylinder 15a is employed as the drive source. In addition, wheelchair 2
By assembling the engaged member 17 to the wheelchair 0, it can be used as a fixing device for many wheelchairs 20. In the above embodiment, a pneumatic cylinder such as a pneumatic cylinder may be used instead of the hydraulic cylinder 15a.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the relationship between a fixing device and a wheelchair according to an embodiment of the present invention, Fig. 2 is a perspective view showing the storage state of the device, and Figs. 3 to 5 show the operation of the device. FIG. 6 is an enlarged perspective view of the engaging member, and FIG. 7 is a longitudinal cross-sectional view of the mounting portion of the engaging member. Explanation of symbols, 10a...Parallel link, 10b...
...Operating mechanism, 10c...Engagement mechanism, 11a, 11
b... Link, 12... Connection plate, 13a,
13b...Connection arm, 14a, 14b...Rail, 15a...Hydraulic cylinder, 15b...Hydraulic motor, 16...Engagement member, 16a...Engagement recess,
17...Engaged member, 20...Wheelchair, 21...
Lower frame, 22...wheel, 23...caster.

Claims (1)

[Scope of utility model registration request] A pair of links with one end rotatably attached to a predetermined part of the floor, and a second link that connects the other ends of these links to each other to form a parallel link, and that moves up and down as the two links rotate. a second connecting member having one end rotatably attached to the parallel link and the other end movably attached to the floor; and the other end of the second connecting member. a driving means for moving and rotating the parallel link; and a drive means provided on the first connecting member that engages with an engaged portion in a lower part of the vehicle body when the connecting member moves from above to below, and A wheelchair fixing device comprising an engaging means for transmitting a downward biasing force to a wheelchair, the driving source of the driving means being fluid pressure.