JP2000126235A - Wheelchair housing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce operating force of a wheelchair housing device and to prevent a holding frame from jumping up at a position for loading and unloading a wheelchair to the holding frame. SOLUTION: A main arm 60 connecting the holding frame holding the wheelchair is rotatable around a shaft 52 with respect to fixed brackets 70 and 71. A support gas spring 73 and a balancer gas spring 74 are stretched between the side plates 61, 62 of a main arm 60 and the brackets 70, 71. At the outside drawing position shown in the figure, in which the holding frame is put out to the outside of a cabin, the action lines S1, S2 of both of the gas springs 73, 74 are respectively on opposite sides from each other, but when the main arm 60 is rotated, the action line of the gas spring 74 is inverted to the same side as the gas spring 73. The lifting force of the holding frame by a synchronized angular moment by both of the gas springs is reduced at the outside drawing position but is increased with rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair storage device for mounting and storing a wheelchair in a vehicle.

[0002]

2. Description of the Related Art As a conventional wheelchair storage device of this kind,
For example, there is one as shown in FIG. This is to mount and store a wheelchair from the opening 3 of the rear door of the vehicle,
A holding frame 40 for holding the wheelchair in between is prepared, and a fixing bracket 5 fixed to the floor 1 in the vehicle interior is provided.
The main arm 10 is rotatably attached to 0 and 50,
The main arm 10 and the holding frame 40 are connected by a link mechanism.

[0003] That is, the main arm 10 is
The carrier bracket 18 is attached to the distal ends of the upper arm 14 and the lower arm 16 rotatably supported by the mounting bracket 12, respectively, to form a four-bar link.

[0004] The holding frame 40 is mainly composed of a pipe member, and extends in the up-down direction and is opened downward.
A receiving frame 42 extending in the front-rear direction is provided at the lower end of the
A U-shaped holding frame 44 is attached rotatably around a pin shaft 43 at the tip end. One end of a gas spring 45 is supported by the holding frame 44, and the gas spring 45
Is supported at a point offset from the pin shaft 43 of the receiving frame 42, so that the upper end of the holding frame 44 presses the wheelchair (not shown) placed on the receiving frame 42 toward the main frame 41. ing.

The main frame 4 is provided at the upper end of the carrier bracket 18.
A notch 19 for receiving the upper end pipe 41a is formed, and a bolt (not shown) is protrudingly provided at a lower end portion, while a bracket 46 having a bolt hole corresponding to the bolt is provided on the main frame 41, Upper end pipe 4
1a is locked in the notch 19, a bolt is inserted into a bolt hole of the bracket 46, and the grip nut 47 is tightened.
It is fixed to 8.

The main frame 41 of the holding frame 40 is provided with a rotatable hook 48 having a handle 49, and the hook 48 is engaged with the mounting bracket 12 of the main arm 10 in the wheelchair storage position. A matching striker 13 is provided. The hook 48 is provided with a spring (not shown) that urges in the direction of engagement with the striker 13. An auxiliary spring (not shown) is attached to the main arm 10 to urge the mounting bracket 12 to rotate in the room direction.

FIGS. 6 to 8 show the movement when the wheelchair storage device is operated, together with a detailed structure not shown in FIG. FIG. 6 shows a state in which the upper arm 14 and the lower arm 16 are extended out of the vehicle, and the lower end of the holding frame 40 is landed. A folded wheelchair 100 is placed between the main frame 41 and the holding frame 44. The mounting bracket 12 of the main arm 10 is substantially upright. When the holding frame 40 is lifted from this state, the mounting bracket 12 is rotated to the indoor side by the auxiliary spring attached to the main arm 10.

The lower arm 16 is provided with a carrier bracket 18.
It has an extension 16a extending to the side opposite to the side, and while the mounting bracket 12 rotates indoors, the extension 16a abuts against a stopper 15 provided on the mounting bracket,
The positional relationship between the mounting bracket 12, the lower arm 16, and the upper arm 14, that is, the relationship between the mounting bracket 12 and the holding frame 40, is kept constant.

Thus, as shown in FIG. 7, when the mounting bracket 12 is rotated to a substantially horizontal state along the floor 1, the holding frame 40 fixed to the carrier bracket 18 is provided.
Becomes substantially horizontal. 57 is the mounting bracket 12
Is a cushion attached to the floor facing surface.

Thereafter, when the holding frame 40 is pushed in the room direction,
When the upper arm 14 and the lower arm 16 rotate,
The holding frame 40 is moved in parallel by the joint link mechanism, and as shown in FIG. 8, the wheelchair 100 held by the holding frame is in a storage position accommodated in the indoor space while being substantially horizontal, and the rear door 2 can be closed. At this time, the cushion 58 attached to the upper arm 14 is
And the hook 48 of the holding frame 40.
Engages with the striker 13 of the mounting bracket 12 to maintain the storage position of the wheelchair.

When the wheelchair 100 is lowered, the hook 4
By pulling the handle 49 of the hook 8, the hook 48 is rotated to disengage from the striker 13, and the holding frame 40 holding the wheelchair can be pulled out to the position shown in FIG.
Thereafter, the operation is performed in the reverse order of the case of the accommodation.

[0012]

In the above-described conventional wheelchair storage device, an auxiliary spring for urging the mounting bracket 12 to rotate in the room direction is provided as shown in FIG.
It is attached to a rotation shaft of the main arm 10. That is, the hinge portion 17 of the horizontal member 11 of the main arm is connected to the fixed bracket 50 fixed to the floor 1 by the shaft 52, and the auxiliary spring 54, which is a torsion coil spring, is attached around the shaft 52. One end of the auxiliary spring 54 is locked to the horizontal member 11 of the main arm 10, and the other end is locked to the fixed bracket 50. As a result, a turning moment is generated as shown by an arrow a, and a lifting force is applied to urge the holding frame 40 in the state of FIG. 6 upward.

However, if the spring force of the auxiliary spring 54 is increased to reduce the operating force when lifting the holding frame 40 by hand, the holding frame 40 is always lifted upward, and the state shown in FIG. Therefore, when the wheelchair 100 is placed on the holding frame 40, there is a problem that the holding frame 40 must be kept pressed by hand. On the contrary, FIG.
If the balance is attempted in the state described above, the lifting operation force becomes large.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a wheelchair storage device in which the operating force is light, and when the wheelchair is mounted, the holding frame does not jump up without pressing with a hand. Aim.

[0015]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a main arm rotatably supported by a fixed bracket fixed in a vehicle interior, and a holding frame connected to the main arm via a link mechanism. In a wheelchair storage device for a vehicle having an external drawer position in which a holding frame is positioned at a low position outside a vehicle compartment and a wheelchair can be loaded and unloaded on the holding frame, and a storage position in which the holding frame is stored in the vehicle interior, A first urging means for applying a large rotational moment to the arm in the direction of lifting the holding frame near the external pull-out position, and reducing the rotational moment as the arm is displaced in the storage position direction; A second mechanism for applying a turning moment in the direction of pushing down the holding frame and inverting the turning moment in the direction of lifting the holding frame as it is displaced in the storage position direction. It was assumed to have a unit.

Thus, at the external pull-out position, the turning moment by the first urging means and the turning moment by the second urging means partially cancel each other, and the turning moment in the lifting direction acts on the main arm. Since the weight is substantially balanced with the weight of the holding frame or the like, the holding frame does not jump up without pressing. When the holding frame is lifted by hand, the turning moment by the second urging means decreases, and the combined lifting force increases. Further, as the position is further displaced toward the storage position, the turning moment by the first urging means is reduced, but a stable lifting force is obtained by the turning moment by the inverted second urging means.

The first biasing means is constituted by a first spring whose one end is supported by the main arm and whose action line of the spring force is offset from the rotation axis of the main arm at the externally withdrawn position. The second biasing means has one end supported by the main arm, and the line of action of the spring force at the external withdrawal position is opposite to the line of action of the spring force of the first spring from the rotation axis of the main arm. It can be constituted by a second spring arranged offset.

In particular, the main arm is supported at its end by a fixed bracket, the first spring and the second spring are each supported at one end by a side plate provided at the end of the main arm, and at the other end. Preferably, it is supported by a fixed bracket. Thus, the first and second urging means are unitized with the main arm and the like. Furthermore, the structure is simplified by providing the first spring at one end of the main arm and the second spring at the other end of the main arm.

[0019]

Embodiments of the present invention will be described below with reference to examples. FIG. 1 is an overall perspective view showing the configuration of the wheelchair storage device in the embodiment. As in the conventional example, the wheelchair is mounted and stored through the opening 3 of the rear door of the vehicle.
A main arm 60 formed by fixing the mounting bracket 12 to the lateral member 11 is rotatably mounted on the fixing brackets 70 and 71 fixed to the floor 1 in the vehicle compartment, and the mounting bracket 12 and the carrier bracket 18 are connected to the upper arm 14. The holding frame 40 is fixed to the carrier bracket 18 by being connected by a link mechanism including the lower arm 16.

Among them, the structure from the mounting bracket 12 to the holding frame 40 is the same as the conventional example shown in FIG. 5, and the position and the position of the holding frame 40 accompanying the rotation of the mounting bracket 12 and the upper arm 14 and the lower arm 16 are shown. The flow of the change of the posture is the same as in the above-mentioned conventional example. For convenience of explanation of the configuration of the embodiment, the state where the holding frame is at the lowest height outside the vehicle compartment for mounting and dismounting the wheelchair on the holding frame as shown in FIG. FIG.
Is referred to as a storage position.

In this embodiment, side plates 61 and 62 extending in substantially the same direction as the mounting bracket 12 are fixedly provided at both ends of a horizontal member 11 extending in the horizontal direction of the floor of the main arm 60. Instead of the auxiliary spring 54 in the conventional example, a support gas spring 73 is stretched between one end of the side plate 61 and the fixed bracket 70 at one end of the horizontal member 11, that is, at the left end here. A balancer gas spring 74 is stretched between the distal end of the side plate 62 and the fixed bracket 71 on the right end side of FIG.

FIG. 2 is an enlarged view of arrow A in FIG.
(A) shows the details of the mounting state of the support gas spring 73 at the externally withdrawn position of the wheelchair storage device,
(B) shows the details of the state of attachment of the balancer gas spring 74 at the external draw-out position. Although the balancer gas spring 74 is hidden by the shadow of the side plate 62 and the like, in order to facilitate understanding, in FIG.
Are indicated by virtual lines.

The fixing brackets 70 and 71 are fixed to the floor 1 of the passenger compartment by manually tightening grip bolts 72 (see FIG. 1). The fixed brackets 70 and 71 and the hinge 67 of the horizontal member 11 are rotatably connected by the shaft 52.

As shown in FIG. 2A, one end of the support gas spring 73 is supported by a tip of the side plate 61 by a support shaft 63, and the support shaft 63 is located substantially above the shaft 52 at the externally withdrawn position. Support gas spring 7
The other end of 3 is supported by the fixed bracket 70 by the support shaft 64 at a position substantially offset from the shaft at the same height as the shaft 52. As a result, the support gas spring 73 is disposed in a forward-upward position on the rear side of the shaft 52, and acts in a direction for rotating the main arm 60 counterclockwise in the drawing as shown by an arrow A with respect to the shaft 52.

On the other hand, as shown in (b), one end of the balancer gas spring 74 is attached to the tip of the side plate 62 by the support shaft 6.
5, and the support shaft 65 is located substantially above the shaft 52 at the external withdrawal position, similarly to the support shaft 63 of the support gas spring 73. Balancer gas spring 7
The other end of 4 is supported by a fixed bracket 71 by a support shaft 66 at a position closer to the shaft 52 than the one end and slightly offset from the shaft. As a result, the balancer gas spring 74 is disposed in a forward-downward position slightly forward of the shaft 52, and acts in a direction to rotate the main arm clockwise with respect to the shaft 52 as shown by an arrow B in the figure.

The distance between the line of action S2 of the spring force of the balancer gas spring 74 and the shaft 52 is smaller than the distance between the line of action S1 of the spring force of the support gas spring 73 and the shaft 52. Therefore, the counterclockwise turning moment by the support gas spring 73 and the clockwise turning moment by the balancer gas spring 74 partially cancel each other, and as a result, the counterclockwise turning moment acts on the main arm 60. This turning moment is applied to the holding frame 40.
A lifting force in the direction of lifting the upper arm 14, the link mechanism of the upper arm 14 and the lower arm 16, and the holding frame 40
The state where the holding frame 40 has landed is maintained in balance with the weight of the holding frame 40.

Next, the change of the lifting force by the support gas spring 73 and the balancer gas spring 74 in the wheelchair storage device configured as described above will be described. FIG. 3 is a diagram illustrating a state in which the main arm 60 has rotated to a position where the line of action S2 of the spring force of the balancer gas spring 74 passes through the shaft 52. (A) shows the state of the support gas spring 73, and (b) shows the state of the balancer gas spring 74.

When the holding frame 40 is lifted from the external pull-out position, the main arm 60 rotates about the shaft 52. During this time, the line of action S1 of the spring force of the support gas spring 73 is sufficiently distant from the shaft 52 and acts in the direction of lifting the holding frame 40 by the turning moment indicated by the arrow C, but the action of the spring force of the balancer gas spring 74 Since the line S2 approaches the shaft 52 and the clockwise turning moment decreases, the holding frame lifting force in the counterclockwise direction increases. In FIG. 3B, since the balancer gas spring 74 is at the dead center position with respect to the shaft 52, there is no clockwise turning moment.

When the main arm 60 further rotates, the action line S1 of the spring force of the support gas spring 73
Approaches the shaft 52, while the balancer gas spring 74 passes through the dead center and reverses the direction of rotating the main arm 60 counterclockwise with respect to the shaft 52. When the wheelchair storage device reaches the intermediate position, as shown in FIG. 4A, the line of action S1 of the spring force of the support gas spring 73 substantially passes through the shaft 52, and no rotational moment is generated. However, at this time, as shown in FIG. 4B, the line of action S2 of the spring force of the balancer gas spring 74 is separated from the shaft 52, and the turning moment in the counterclockwise direction becomes large as shown by the arrow D. I have.

As described above, in the present embodiment, the turning moments in the opposite directions are generated at the external pull-out position, and one of the turning moments is reversed as the main arm 60 is turned to generate the turning moment in the same direction. Support gas spring 73
And the balancer gas spring 74 were combined and attached to the main arm. In other words, at the external pull-out position, the lifting force offset by the support gas spring 73 and the balancer gas spring 74 and the weight of the holding frame 40 and the like are balanced, and the holding frame is maintained in a landed state. There is no need to manually hold up the holding frame when the 100 is placed.

When the holding frame 40 sandwiching the wheelchair is lifted, the action of the balancer gas spring 74 is reduced and the holding frame lifting force is increased, so that the operation can be performed with a light force. When the holding frame 40 is further lifted and the main arm 60 is rotated, the lifting force of the support gas spring 73 decreases, but the lifting force of the inverted balancer gas spring 74 increases instead. The lifting force is maintained without sudden change.

After the main arm 60 has pivoted to a position substantially along the floor 1 in this manner, the substantially horizontal holding frame 40 is simply pushed forward (toward the interior of the room), and the four-arm link upper arm The holding frame 40 can be lightly moved to the storage position by rotating the 14 and the lower arm 16.

In this embodiment, since both the support gas spring 73 and the balancer gas spring 74 are provided between the side plates 61, 62 of the main arm and the fixed brackets 70, 71, they are unitized with the main arm and the like. By simply fixing the fixing bracket to the floor, the entire wheelchair storage device can be mounted very easily.

Further, since the support gas spring 73 and the balancer gas spring 74 are separately provided at the left and right ends of the main arm 60, no complicated mechanism is required and the structure is simplified. However, the present invention is not limited to this. For example, by arranging a support gas spring and a balancer gas spring on both sides of the side plate, these can be concentratedly provided at one end of the main arm. Moreover,
A set of these support gas springs and balancer gas springs may be provided on both left and right ends.

The holding frame 40 is mainly composed of a pipe member. However, the structure and the shape are not particularly limited, and any structure may be used as long as the wheelchair can be securely held. The link mechanism for connecting the holding frame 40 and the main arm 60 is not limited to the one shown in the embodiment, and any link mechanism that lifts the holding frame holding the wheelchair from the outside of the cabin by rotating the main arm and moves the wheelchair to the cabin. The present invention can be applied to various wheelchair storage devices.

[0036]

As described above, according to the present invention, the holding frame is connected to the holding frame via the main arm link mechanism rotatably provided in the vehicle compartment, and the wheelchair can be loaded and unloaded to the holding frame, and the vehicle is pulled out. In a wheelchair storage device having a storage position in which a holding frame is stored in a room,
First biasing means for applying a large rotational moment in the direction of lifting the holding frame in the vicinity of the external draw-out position and reducing the rotational moment as it is displaced in the storage position direction;
In the vicinity of the external draw-out position, there is provided a second urging means for applying a turning moment in a direction of pushing down the holding frame and inverting the turning moment in a direction of lifting the holding frame as the displacement is made toward the storage position. In the external pull-out position, the lifting force due to the combined rotational moment is balanced with the weight of the holding frame, etc., so that the holding frame is not required to be pressed down, and a large change occurs while the holding frame is lifted and displaced in the storage position direction. This has the effect that the operation can be performed lightly with the increased lifting force.

Each of the first and second urging means is constituted by a spring, one end of which is supported by a side plate provided at the end of the main arm, and the other end of which is supported by a fixed bracket which supports the main arm. Since the first and second urging means are unitized with the main arm and the like, the entire wheelchair storage device can be mounted extremely simply by fixing the fixing bracket to the floor.

Further, the first spring is provided at one end of the main arm, and the second spring is provided at the other end of the main arm, so that the structure is simple and can be easily applied to the conventional device. be able to.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a view showing a state in which a main arm is rotated to a position where a line of action of a spring force of a balancer gas spring passes through a shaft.

FIG. 4 is a diagram showing a state in which a main arm has been rotated to an intermediate position.

FIG. 5 is an overall perspective view showing a configuration of a conventional example.

FIG. 6 is a diagram showing a movement when the wheelchair storage device is operated.

FIG. 7 is a diagram showing a movement when the wheelchair storage device is operated.

FIG. 8 is a diagram showing a movement when the wheelchair storage device is operated.

FIG. 9 is a view showing a main arm auxiliary spring in a conventional example.

[Explanation of symbols]

 Reference Signs List 1 floor 2 rear door 3 opening 5 seat back 10 main arm 11 lateral member 12 mounting bracket 13 striker 14 upper arm 15 stopper 16 lower arm 16a extension 17 hinge part 18 carrier bracket 19 notch 40 holding frame 41 main frame 41a upper end pipe 42 receiving Frame 43 Pin shaft 44 Holding frame 45 Gas spring 46 Bracket 47 Grip nut 48 Hook 49 Handle 50 Fixing bracket 52 Shaft 54 Auxiliary spring 57, 58 Cushion 60 Main arm 61, 62 Side plate 63, 64, 65, 66 Support shaft 67 Hinge Part 70, 71 Fixing bracket 72 Grip bolt 73 Support gas spring 74 Balancer gas spring 100 Wheelchair

Claims (4)

[Claims] 1. A vehicle comprising: a main arm rotatably supported by a fixed bracket fixed to a vehicle interior; and a holding frame connected to the main arm via a link mechanism, wherein the holding frame is located at a low position outside the vehicle interior. In a wheelchair storage device for a vehicle having an external drawer position capable of loading and unloading a wheelchair on the holding frame and a storage position in which the holding frame is stored in the vehicle compartment,
In the vicinity of the external pull-out position, a large turning moment is applied to the main arm in a direction of lifting the holding frame,
A first urging means for reducing a turning moment as it is displaced in the storage position direction, and a turning moment in a direction of pushing down the holding frame in the vicinity of the external draw-out position; A second urging means for reversing the rotational moment in the lifting direction. 2. The first biasing means, wherein one end of the first biasing means is supported by the main arm, and a line of action of the spring force is offset from a rotation axis of the main arm at an externally withdrawn position. The second biasing means has an end supported by the main arm at one end, and the line of action of the spring force at the externally withdrawn position has the action of the spring force of the first spring from the rotation axis of the main arm. The wheelchair storage device according to claim 1, further comprising a second spring that is arranged to be offset from a side opposite to the line. 3. The main arm is supported at its end by the fixed bracket, and the first spring and the second spring are each supported at one end by a side plate provided at an end of the main arm. The wheelchair storage device according to claim 2, wherein the other end is supported by a fixing bracket. 4. The device according to claim 2, wherein the first spring is provided at one end of the main arm, and the second spring is provided at the other end of the main arm. Wheelchair storage device.