JP3096543B2 - Wheelchair fixing device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fixing a wheelchair in a vehicle such as an automobile when the user is in a wheelchair.

[0002]

2. Description of the Related Art Conventionally, as a wheelchair fixing device for a vehicle,
For example, as shown in FIG. 12, a fixing device using a belt is often used. In the structure of fixing with such a belt, the fixing operation and the fixing releasing operation are troublesome,
There is a problem that it is difficult for a person sitting in a wheelchair to perform the operation himself, and an attendant is required.

[0003] The applicant of the present application has previously described the Japanese Utility Model Application 1-6
No. 8030 discloses a vehicle wheelchair fixing device. This prior art includes a regulating groove formed on a floor for dropping a wheelchair wheel, a lid member that opens and closes the regulating groove, and has a substantially 「-shaped shape when the regulating groove is opened to serve as a vehicle stop. A plurality of hooks rotatably supported from a state of being stored under the floor to a state of being raised up on the floor, a hook driving means for rotating the hook, and a lid member driving means for opening and closing the lid member; It has a structure with.

Therefore, when the wheelchair is fixed, each wheel of the wheelchair is dropped into the restricting groove, and the cover member is bent into a substantially "-" shape to be in a car stop state, thereby restricting the movement of the wheels in the front-rear and left-right directions. The hook was raised and hooked on the wheelchair to restrict the upward movement of the wheelchair, thus securely fixing the wheelchair.

[0005]

However, the above-mentioned prior art requires a large number of necessary driving means and many movable parts, so that the structure is complicated and the structure is desired to be simplified.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a vehicle wheelchair fixing device having a novel structure capable of securely fixing with a simple structure. I have.

[0007]

In order to achieve the above object, a vehicle wheelchair fixing device according to the present invention is installed on the floor of a vehicle body and restricts movement of a wheelchair to be fixed forward or backward. a bollard that, the each other end of the two links are constructed pivotably ligated, is formed to be bent at an intermediate portion which is a connection of these links, the floor
A link member extending in the wheel supporting direction by a bollard, a hook integrally provided at an intermediate portion of the link member, and formed to be able to engage with an anchor portion provided in the wheelchair; And moving both ends of the link member at different speeds in the front-rear direction .
Simultaneously move the hook in two directions, upward and forward and backward.
And a moving mechanism configured to allow the moving mechanism.

The moving mechanism is formed under the floor so as to be rotatable and extends in the front-back direction, an actuator for rotating the ball screw, and a helically formed outer periphery of the ball screw. A single spiral groove formed by connecting a large pitch portion with a coarse pitch and a small pitch portion with a fine pitch, an annular portion slidably mounted on the outer periphery of the ball screw, and an inward portion from the annular portion. A first projection having an engaging projection protrudingly engaged with the spiral groove and connected to one end of the link member and mounted on the large pitch portion;
It may be constituted by a slider and a second slider connected to the other end of the link member and mounted on the small pitch portion.

[0009] Alternatively, the moving mechanism includes a first ball screw and a second ball screw that are rotatably supported under the floor and are juxtaposed and extend in the front-rear direction, an actuator that rotates both ball screws, A first spiral groove spirally formed on the outer periphery of the first ball screw, and a second spiral groove spirally formed on the outer periphery of the second ball screw and formed at a pitch different from that of the first spiral groove. An annular portion slidably mounted on the outer periphery of each ball screw, and an engaging projection projecting inward from the annular portion to engage with the spiral groove. It may be constituted by a first slider mounted on the screw and a second slider connected to the other end of the link member and mounted on the second ball screw.

In order to achieve the above object, a vehicle wheelchair fixing device according to a fourth aspect of the present invention is provided on a floor of a vehicle body, and controls a movement of a fixed wheelchair forward or backward. The ends of the two links are rotatably connected to each other, are formed to be bendable at an intermediate portion that is a connecting portion of these links, and are arranged with both ends separated in the front-rear direction. A link member rotatably mounted below the floor at one end in the movement-restricting direction side by the bollard, and a link member installed under the floor so that the other end of the link member can be moved in the front-rear direction. A first moving mechanism, a hook formed to be able to engage with an anchor provided on the wheelchair, and a hook arranged at a position above a receiving portion provided at an intermediate portion of the link member; Connected to the base end of A second moving mechanism for moving the hook by pulling the fixed belt in the direction of movement restriction by the bollard, and moving the tension belt connected to a position on the distal end side of the fixed belt connecting portion of the hook by the second moving mechanism. There is provided a tension mechanism configured to be able to draw out and wind while maintaining a predetermined tension in a direction opposite to the direction.

[0011]

The procedure for fixing the wheelchair of the apparatus according to the first aspect of the present invention will be described. Before the wheelchair is fixed, it is assumed that the link member is stored under the floor with the middle bent portion extended. It is also assumed that at least a part of the hook integrally provided at the intermediate portion of the link member is stored under the floor together with the link member.

When the wheelchair is fixed, the front wheel or the rear wheel of the wheelchair is first moved by moving the wheelchair placed on the floor of the vehicle body, thereby restricting the forward or backward movement of the wheelchair.

Next, the moving mechanism is operated to move both ends of the link member at different speeds. In this case, when the rearward movement of the wheelchair is restricted by the vehicle stop, both ends of the link member are moved rearward, and the front end of the link member is naturally moved at a speed higher than the rear end. Conversely, when the forward movement of the wheelchair is restricted by a wheel stop, both ends of the link member are moved forward, and the rear end is moved at a higher speed than the front end.

As described above, when both ends of the link member are moved, the distance between both ends is reduced by the speed difference, the link member is bent at the intermediate portion, and the intermediate portion of the link member is lifted upward.
The hook also moves upward accordingly. Further, since both ends of the link member are moved forward or backward, the hook is moved not only upward but also forward or backward.

As described above, the hook is engaged with the anchor portion of the wheelchair by moving the hook upward and moving forward or backward, which is the direction of movement restriction by the wheel stop. Since the engagement is performed while also moving in the front-rear direction, the distance between the hook and the wheel stop in the front-rear direction can be reduced to a predetermined distance, and the wheelchair can be firmly fixed therebetween.

Next, when releasing the fixation of the wheelchair, both ends of the link member are moved by the moving mechanism in the opposite direction at the same speed difference as above. Thereby, the interval between both ends of the link member is widened, and the middle portion in the bent state gradually extends and is stored under the floor. In addition, the hook moves rearward or forward with the operation of the link member, moves downward, disengages from the anchor portion, and then moves below the floor.

As described above, in operating the moving mechanism, in the case of the apparatus according to the second aspect, the ball screw is rotated by the actuator. Then, each slider engaged with a spiral groove formed in a spiral shape on the outer periphery of the ball screw moves along the ball screw. At this time,
The first slider is engaged with the large pitch portion of the spiral groove, while the second slider is engaged with the small pitch portion. The sliding amount of the first slider that is engaged with is larger. Therefore, as described above, the link member can be bent or extended by changing the distance between both ends of the link member. After the first slider reaches the small pitch portion, the sliding speed of both sliders becomes equal, and the link member moves in parallel. Therefore, the hook provided in the intermediate portion of the link member is moved upward by the bending of the link member, and then moves horizontally with the link member.

In operating the moving mechanism, the ball screw is rotated by driving the actuator. Then, each slider engaged with the spiral groove of each ball screw slides along the ball screw in the same manner as in the device of the second aspect. In this case, since the pitch of the spiral groove of each ball screw is different, the sliding speed of each slider is different, the link member is bent as described above, and the hook is lifted up and moves in the direction of movement restriction by the bollard. .

Next, a procedure for fixing a wheelchair by the device according to the fourth aspect of the present invention will be described. Before the wheelchair is fixed, it is assumed that the link member is stored under the floor with the middle bent portion extended. Also, at least a part of the hook is stored under the floor together with the link member, and the fixed belt of the second moving mechanism is routed on the receiving portion of the link member.

When the wheelchair is fixed, first, the front wheel or the rear wheel of the wheelchair is moved by moving the wheelchair placed on the floor of the vehicle body, thereby restricting the forward or rearward movement of the wheelchair.

Next, the first moving mechanism is operated to move the unfixed end of the link member by a predetermined amount. Accordingly, the interval between both ends of the link member is reduced and the intermediate portion of the link member is bent until it rises to a predetermined height, and accordingly, the fixed belt disposed at a position above the receiving portion of the link member receives the receiving portion. As a result, the hook is lifted, and the tension belt is pulled out from the tension mechanism by the amount of displacement of the hook.

Next, the second moving mechanism is operated to pull the fixed belt in the direction restricted by the vehicle stop. Therefore, the hook moves in the direction in which the fixed belt extends while being maintained in a state of being pulled by the tension belt of the tension mechanism with a predetermined tension. Therefore, the hook first moves up to the height of the receiving portion, and then moves in the direction of movement restriction by the wheel stop, and engages with the anchor portion of the wheelchair on the way.

As described above, since the hook is engaged while moving in the direction of movement restriction by the wheel stop, the distance between the hook and the wheelchair is reduced to a predetermined distance, and the wheelchair is firmly fixed between the two. be able to.

Next, when releasing the fixation of the wheelchair, the second moving mechanism is driven in reverse to the above. As a result, the hook moves forward while the tension belt is being wound by the tension mechanism, whereby the engagement between the hook and the anchor portion is released. Thereafter, the first moving mechanism is operated in the opposite direction to that described above, and the link member is lowered while extending the intermediate portion in the bent state, and is stored under the floor. In addition, the position of the receiving portion is lowered, thereby lowering the positions of the hook, the fixing belt, and the tension belt, and the tension belt is wound up by the tension mechanism by an amount loosened by this downward movement, and the hook is stored under the floor. Is done.

[0025]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional side view showing a vehicle wheelchair fixing device according to a first embodiment of the present invention, wherein 1 is a floor of an automobile. The floor 1 is provided with an opening 1a.
The support plate 2 is elastically supported at the same height as the floor 1. This elastic support structure is shown in the cross-sectional view of FIG. 2 and the plan view of FIG. 3, in which four bolts 3 are erected inside the opening 1a. The support plate 2 is provided on the outer periphery of the rubber bush 4.
A frame 2a having a substantially double girder shape fixed to the lower side is supported. At the center of the support plate 2 , an operating groove 2b formed through the support plate extends in the front-rear direction (F indicates the front of the vehicle and R indicates the rear). ing.

In FIG. 1, reference numeral 5 denotes a wheelchair having a front wheel 5a and a rear wheel 5b, and a substantially "U" -shaped anchor portion 5c is provided on the lower side.

The device of the first embodiment is composed of bollards 6, 6, a link member 7, a hook 8, and a moving mechanism 9. As shown in FIGS. 1 and 3,
It is installed on the upper surface of the rear end of the support plate 2.

The link member 7 is composed of a first link 7a and a second link 7b. One end of each of the two links 7a and 7b is rotatably connected to each other, and can be bent at an intermediate portion. Have been.

The hook 8 is formed integrally with one end of the second link 7b, and is formed so as to be able to engage with the anchor portion 5c.

Next, the moving mechanism is installed in a space S formed below the support plate 2, and includes a motor 9a, a ball screw 9b, a first slider 9c and a second slider 9c. 9d.

The ball screw 9b is disposed directly below the operating groove 2b of the support plate 2, and both ends thereof are rotatably supported by support brackets 2c, 2c fixed to the back surface of the support plate 2. The ball screw 9b is rotated in the forward and reverse directions by driving a motor 9a connected to the front end thereof. Further, a single spiral groove 9e is formed on the outer periphery of the ball screw 9b over the entire length. As shown in FIG. 4, the spiral groove 9e has a rough pitch in the front half of the ball screw 9b. a large pitch portion 9f formed in the P _1, is composed of a small pitch portion 9g formed in the dense pitch P ₂ than the pitch P ₁ in the side half of the ball screw 9b.

As shown in FIGS. 4 and 5, the first slider 9c and the second slider 9d respectively
An annular portion 9h loosely fitted on the outer periphery of the ball screw 9b;
An engagement pin 9j projecting inward from the annular portion 9h and engaged with the spiral groove 9e; a first slider 9c is mounted on the front side of the ball screw 9b; 9b is mounted on the rear side.

Then, as shown in FIG.
Both ends of the link member 7, that is, one ends of the first and second links 7a and 7b are rotatably connected to the second sliders 9c and 9d, respectively. Therefore, as shown by the imaginary line in the figure, when the distance between the sliders 9c and 9d is widened, the links 7a and 7b are in the lying state and are stored in the space S below the support plate 2. ,vice versa,
When the distance between the two sliders 9c and 9d is reduced, the links 7a and 7b are connected to the operating grooves 2 as indicated by solid lines in FIG.
Stand up through b. When the two links 7a and 7b are in the down state, the first slider 9c is in the spiral groove 9
e, the second slider 9
d is configured to be arranged in the small pitch portion 9g.

Next, the operation of the embodiment will be described.

The procedure for fixing the wheelchair 5 will be described. At the time before the wheelchair 5 is fixed, the link member 7 is in a lying state as shown by an imaginary line in FIG. 1, and the hook 8 is also located in the space S below the support plate 2. It is stored.

When the wheelchair 5 is placed on the floor 1, the rear wheel 5b of the wheelchair 5 is arranged so as to be in contact with the wheelchair 6 as shown in FIG.

Next, the motor 9 is operated by operating a switch (not shown).
a is driven. The ball screw 9b is rotated by the driving of the motor 9a, and the engaging pins 9j of the sliders 9c and 9d are rotated.
As the engagement position between the slider 9c and the spiral groove 9e is displaced, the sliders 9c and 9d move rearward along the ball screw 9b. At this time, since the large pitch portion 9f of the spiral groove 9e is formed at a larger pitch than the small pitch portion 9g, the first slider 9c mounted on the large pitch portion 9f is formed.
Is the second slider 9d mounted on the small pitch portion 9g.
It moves to the rear R at a faster speed. Therefore, the distance between both sliders 9c and 9d gradually decreases, and both links
As shown by solid lines in FIG. 1, the link members 7 are bent and the hooks 8 are arranged at a predetermined height.

Then, the first slider 9c is moved to the small pitch portion 9
g, the sliders 9c and 9d move at the same speed, the hook 8 moves rearward while maintaining the predetermined height, and the anchor portion 5c of the wheelchair 5 as shown in the figure.
And the hook 8 attempts to move further rearward R after this engagement, so that the wheelchair 5
Between the vehicle stop 6 and the vehicle stop 6 without any clearance. In addition, the rearward movement of the hook 8 is restricted, and when the load on the motor 9a becomes higher than a predetermined value, the driving of the motor 9a is automatically stopped. Note that, as described above, the distance that the first slider 9c moves through the small pitch portion 9g is set slightly.

As described above, the wheelchair 5 is firmly fixed by the hook 8 and the wheel stopper 6 without any clearance therebetween, so that the movement in the horizontal direction is restricted, and the engagement with the hook 8 is performed. This also restricts upward movement.

Further, when the vehicle is driven in such a fixed state of the wheelchair 5, the vibration generated in the vehicle body is transmitted to the support plate 2 after being attenuated by the rubber bush 4 to improve the riding comfort in the wheelchair 5. it can.

Next, when releasing the fixation of the wheelchair 5, the motor 9a is driven in the opposite direction to the above, and the ball screw 9b is rotated in the reverse direction. Thereby, both sliders 9c, 9
d moves forward F, the link member 7 and the hook 8 move forward, and the hook 8 is disengaged from the anchor portion 5c. Thereafter, when the first slider 9c moves from the small pitch portion 9g to the large pitch portion 9f, the forward moving speed of the first slider 9c increases, and the interval between the two sliders 9c and 9d is widened. , 7b start to lie down and the link member 7 extends, and finally the support plate 2
In the lower space S.

As described above, according to the first embodiment, when the wheelchair 5 is fixed, the link member 7 that bends and expands and contracts in the middle as a structure for raising the hook 8 and moving the hook 8 to the rear R is provided. A moving mechanism 9 for moving both ends of the link member 7 at different speeds is provided, and the moving mechanism 9 is provided with one motor 9a and one ball screw 9
b and two sliders 9c and 9d,
The effect is that the structure is simple, the manufacturing is easy, and the cost can be reduced. In addition, since the support plate 2 for supporting the wheelchair 5 is elastically supported via the rubber bush 4, the vibration of the vehicle body is hardly transmitted to the wheelchair 5, so that an effect of improving the riding comfort can be obtained.

Hereinafter, another embodiment will be described.
In this description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted. The description of the same operation as in the first embodiment will be omitted, and only the differences will be described.

FIGS. 6 to 8 show a main part moving mechanism 29 of a second embodiment according to the third aspect of the present invention.
6 is a plan view of the moving mechanism 29, FIG. 7 is a side view of the moving mechanism 29, and FIG. 8 is a sectional view taken along line S8-S8 of FIG. The moving mechanism 29 is provided below the support plate as in the first embodiment.

As shown in the figures, the moving mechanism 29 has a first ball screw 29a and a second ball screw 29b juxtaposed, and both ends thereof are rotatably supported. Also,
One end of each of the ball screws 29a and 29b is provided with a drive gear 29.
c, 29d are connected, and each drive gear 29c, 29d is
It is meshed with a drive gear 29e driven by the motor 9a. The drive gears 29c to 29e are formed with the same number of gears. When the motor 9a is driven, the ball screws 29a and 29b are rotated at the same speed.

The first ball screw 29a has a first spiral groove 29f having the same pitch as the large pitch portion 9f, while the second ball screw 29b has the same pitch as the small pitch portion 9g. The second spiral groove 29g is formed, and the first slider 9c is mounted on the first ball screw 29a, while the second slider 9d is mounted on the second ball screw 29b.

Each of the sliders 9c and 9d has a first link 27a and a second
One end of the link 27b is rotatably connected. The two links 27a and 27b are bent at one end in the vehicle width direction. Also, both links 27a, 27b
The other ends are rotatably connected to each other as in the first embodiment, and the hook 8 is integrally provided at the tip of the second link 27b.

Therefore, as shown in FIG.
When the motor 9a is driven in a state where the link members 27a and 27b are folded down and the link member 27 is extended, the two ball screws 29a,
29b rotates at the same speed, and the first slider 9c slides rearward at a speed faster than the second slider 9d due to the difference in pitch between the spiral grooves 29f and 29g. Is narrowed, and both links 27a, 2
7b moves backward R while standing up. Therefore, the hook 8 moves rearward while ascending, engages with the anchor portion 5c of the wheelchair 5 (not shown), and further moves rearward R to move the wheelchair 5 to the hook 8 as in the first embodiment. And the bogie 6 can be firmly fixed without clearance.

Next, a description will be given of a third embodiment of the present invention shown in FIGS. In addition,
9 and 10 are side views of the main part of the third embodiment, and FIG.
FIG. 9 is a plan view of a main part of the device of the third embodiment.

In the figure, reference numeral 37 denotes a link member which is formed by connecting a first link 37a and a second link 37b. The difference from the above embodiment is that both links 37
a and 37b are connected to each other with the ends separated from each other in the vehicle width direction.
The receiving part 37d is formed between a and 37b.

In the figure, reference numeral 39 denotes a first moving mechanism for moving the front end of the link member 37 in the front-rear direction, and a first slider 9c to which the front end of the first link 37a is rotatably connected. When the first slider 9c is mounted on the first
And a ball screw 29a. That is, the rear end of the second link 37b is pivotally mounted on the vehicle body, and the link member 37 is extended by the sliding of the first slider 9c as shown in FIG. As shown in FIG. 10, the receiving portion 3
7 d is arranged above the support plate 2. In the drawing, a and b indicate the positions of the limit switches, respectively. When the first slider 9c reaches these positions, the driving of the motor 9a is stopped.

The hook 8 has a base end connected to a fixed belt 49a to be described later.
a tension belt 3 which will be described later,
1a are connected.

The fixed belt 49a is connected to the second moving mechanism 4
9. The second moving mechanism 49 is for moving the hook 8 backward R. In addition to the fixed belt 49a, a second slider 9d to which the fixed belt 49a is connected, and the second slider 9d are mounted. The second ball screw 49b (this second ball screw 49
The pitch of the second helical groove 49d formed on the outer periphery of a may be the same as or different from that of the first ball screw 29a. ) And a motor 49c for rotating the second ball screw 49b. When the motor 49c is driven, when the second slider 9d slides back and forth and slides backward R, the hook 8 is moved. Pull backward R. In the drawing, c indicates the position of the limit switch, and when the second slider 9d slides forward to this position, the drive of the motor 49c is stopped.

The tension belt 31a is connected to the tension mechanism 31 so that it can be pulled out and taken up. The tension mechanism 31 always pulls the hook 8 forward F with a predetermined tension, and has the same structure as that generally used as an automobile seat belt.

The tension mechanism 31 and the tension belt 31 described above.
a, the hook 8 is moved to the receiving portion 37d by the second moving mechanism 49.
At a predetermined tension.

Next, a procedure for fixing a wheelchair using the apparatus according to the third embodiment will be described. In a state before the wheelchair is fixed, the link member 37 is extended and stored below the support plate 2 as shown in FIG.
It is stored under

When the wheelchair is fixed, similarly to the first embodiment, the wheelchair (not shown) is moved so that the rear wheel of the wheelchair abuts the wheelchair, and the forward or rearward movement of the wheelchair is regulated.
The first moving mechanism 39 is operated to move the front end of the link member 37 by a predetermined amount until the limit switch b is turned on. That is, the first ball screw 29a is rotated by the motor 9a to slide the first slider 9c backward. Thereby, the interval between both ends of the link member 37 is narrowed, the link member 37 is bent, and the receiving portion 37d is raised to a predetermined height (FIG. 10). Then, the fixing belt 49a is lifted as shown in FIG. 10 by the upward movement of the receiving portion 37d, and the hook 8 is also lifted at the same time. Further, the tension belt 31a is pulled out from the tension mechanism 31 by the displacement amount of the hook 8.

Next, when the motor 49c of the second moving mechanism 49 is driven to rotate the second ball screw 49b,
The slider 9d moves to the rear R and pulls the fixed belt 49a to the rear R, and the hook 8 engages with the anchor portion 5c after being raised as shown by the imaginary line in FIG.
Further, by further pulling the hook 8 toward the obliquely lower rear R, which is the extending direction of the fixing belt 49a, the wheelchair is firmly fixed between the hook 8 and the unillustrated wheel stop.

Next, when releasing the fixation of the wheelchair, the second moving mechanism 49 is driven in reverse to the above until the limit switch c is turned on. Thereby, tension belt 3
1a is taken up by the tension mechanism 31, and the hook 8 moves forward, whereby the engagement with the anchor portion 5c is released.
Thereafter, the function first moving mechanism 39 is operated in the opposite direction to the above, and the link member 37 is extended as shown in FIG. Since the receiving portion 37 d descends due to the extension of the link member 37, the hook 8 also descends, and at the same time, the tension belt 31 a is taken up by the tension mechanism 31 while maintaining the tensioned state of the tension belt 31 a with a predetermined tension. This results in the state shown in FIG.

Although the embodiment has been described above, the specific configuration is not limited to this embodiment, and any change in the design without departing from the gist of the present invention is included in the present invention.

For example, in the second embodiment, in order to slide the first slider 9c and the second slider 9d at different speeds, the respective spiral grooves 29 of both ball screws 29a and 29b are required.
Although the pitches of f and 29g are made different, the pitches of both may be formed to be the same and the number of teeth of the drive gears 29c and 29d may be made different.

[0063]

As described above, in the vehicle wheelchair fixing device according to the first aspect, the wheelchair is provided with a moving mechanism for moving both ends of a link member integrally provided with a hook. When the hook is fixed, the hook is moved upward, and the hook is engaged with the anchor portion of the wheelchair by moving the hook forward and backward, which is the movement restriction direction of the wheelchair. By narrowing to a predetermined distance, the wheelchair can be firmly fixed between them. When the wheelchair is fixed in this manner, the only movable part is the link member, and the only driving means is a configuration that moves both ends of the link member. Therefore, the configuration can be simplified. That is, the effect of being able to provide a vehicle wheelchair fixing device having a novel structure capable of securely fixing with a simple configuration can be obtained.

Further, in the invention according to the second aspect, when moving both ends of the link member, the ball screw having a spiral groove in which a large pitch portion and a small pitch portion are connected to one another, and A first slider engaged with the large pitch portion and attached to the ball screw and a second slider engaged with the small pitch portion and attached to the ball screw are provided, and only one ball screw is rotated. Since the link member expands and contracts, an effect that the configuration can be greatly simplified can be obtained.

According to the third aspect of the present invention, in moving both ends of the link member, first and second ball screws having helical grooves having different pitches are provided, and the first and second sliders are respectively provided for the first and second ball screws. , The structure is simple.

Next, in the fourth aspect of the present invention, similarly to the first aspect of the present invention, one hook can be raised and moved in the direction of movement restriction by a car stop. The wheelchair can be firmly fixed between them by narrowing the front-rear direction gap between the wheelchair and the wheel stop to a predetermined distance, and the movable part is only the link member and the hook, and the link member is used as the driving means. The first moving mechanism for moving one end of the first and the second moving mechanism for moving the hook
Since the moving mechanism is used, the configuration can be simplified. That is, the effect of being able to provide a vehicle wheelchair fixing device having a novel structure capable of securely fixing with a simple configuration can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a vehicle wheelchair fixing device according to a first embodiment of the present invention.

FIG. 2 shows a main part of the first embodiment device (S2-S in FIG. 3).
2) It is sectional drawing.

FIG. 3 is a plan view showing a main part of the device of the first embodiment.

FIG. 4 is a perspective view showing a main part of the apparatus of the first embodiment.

FIG. 5 is a cross-sectional view showing a main part of the first embodiment device.

FIG. 6 is a plan view showing a moving mechanism of the second embodiment device.

FIG. 7 is a side view showing a moving mechanism of the second embodiment.

8 shows a main part of the device of the second embodiment (S8-S in FIG. 6).
8) It is sectional drawing.

FIG. 9 is a side view showing a moving mechanism of the third embodiment.

FIG. 10 is a side view showing a moving mechanism of the third embodiment.

FIG. 11 is a plan view showing a main part of the device of the third embodiment.

FIG. 12 is a perspective view showing a fixed state of a wheelchair by a conventional wheelchair fixing device.

[Explanation of symbols]

 Reference Signs List 1 floor 5 wheelchair 6 car stop 7 link member 7a first link 7b second link 8 hook 9 moving mechanism 9a motor (actuator) 9b ball screw 9c first slider 9d second slider 9e spiral groove 9f large pitch portion 9g small pitch portion 9h Annular part 9j Engagement pin (engagement projection) 27 Link member 27a First link 27b Second link 29 Moving mechanism 29a First ball screw 29b Second ball screw 29f First spiral groove 29g Second spiral groove 31 Tension mechanism 31a Tension Belt 37 Link member 37a First link 37b Second link 37c Receiver 39 First moving mechanism 49 Second moving mechanism 49a Fixed belt

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61G 3/00 A61G 5/02

Claims (4)

(57) [Claims] 1. A wheelchair, which is installed on the floor of a vehicle body and regulates the forward or backward movement of a wheelchair to be fixed, and a rotatably connected end of two links. Is formed so as to be able to bend at an intermediate portion which is a connecting portion of the vehicle, and a wheel supporting direction by a car stop along the floor.
A link member which extends into, integrally provided on the middle portion of the link member, engagable-formed hook anchor portion provided on the wheelchair, is installed under the floor, of the link member The two ends are moved at different speeds in the front-rear direction, whereby the foot is moved.
And a moving mechanism configured to be able to simultaneously move the wheel in two directions, upward and forward and backward . 2. The ball screw according to claim 1, wherein the ball screw is rotatably supported under the floor and extends in the front-rear direction, an actuator for rotating the ball screw, and a spiral around the outer periphery of the ball screw. A spiral groove formed by continuously forming a large pitch portion having a coarse pitch and a small pitch portion having a dense pitch, an annular portion and an annular portion slidably mounted on the outer periphery of the ball screw. A first slider mounted on the large pitch portion and connected to the other end of the link member connected to one end of the link member. A wheelchair fixing device for a vehicle, comprising: a second slider mounted on a small pitch portion. 3. A moving mechanism according to claim 1, wherein said moving mechanism is rotatably supported beneath the floor and is juxtaposed, and rotates the first ball screw and the second ball screw extending in the front-rear direction. An actuator to be formed; a first spiral groove formed in a spiral shape on the outer periphery of the first ball screw; and a first spiral groove formed in a spiral shape on the outer periphery of the second ball screw and formed at a different pitch from the first spiral groove. A helical groove, an annular portion slidably mounted on the outer periphery of each ball screw, and an engaging projection projecting inward from the annular portion to engage with the helical groove, and connected to one end of the link member. A first slider mounted on the first ball screw and a second slider connected to the other end of the link member and mounted on the second ball screw. . 4. A vehicle stop installed on the floor of a vehicle body for restricting a fixed wheelchair from moving forward or rearward, and a link between the two links by rotatably connecting the ends of the two links. A link that is formed to be bendable at an intermediate portion, and is disposed so that both ends are separated from each other in the front-rear direction, and one end in the movement regulation direction side by the wheel stop is rotatably mounted below the floor. A member, a first moving mechanism installed under the floor and configured to be able to move the other end of the link member in the front-rear direction, and formed to be engageable with an anchor provided in the wheelchair. A hook, and the hook is arranged at a position above a receiving portion provided at an intermediate portion of the link member, and the hook is moved by pulling a fixed belt connected to a base end of the hook in a movement regulating direction by the bollard. Sa A second moving mechanism, and a tension belt connected to a position closer to the distal end than the fixed belt connecting portion of the hook is pulled out and wound while maintaining a predetermined tension in a direction opposite to the moving direction by the second moving mechanism. A wheelchair fixing device for a vehicle, comprising: a tension mechanism configured to be capable of being used.