JP2003190220A - Removable table device of wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a removable table device of a wheelchair, which is normally detached from the wheel chair and placed on armrests mounted on right and left sides of the wheelchair to be used as a table in need in the light of circumstances where when a seated person of the wheelchair takes a meal or reads a book still in his seated posture, a removable table is convenient, because a fixed table is normally an obstacle to getting on and off the wheelchair. <P>SOLUTION: This table 21 is provided with a hook 23 turned to a first state of being rotatably supported on a lower shaft support part 25 to press the lower side of the armrest 4, thereby holding the table 21 on the armrests 4 and a second state of releasing the above pressing to detach the table 21 from the armrests 4. Thus, the table is provided with a mechanism for holding the pressing state of the armrests 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair table device.

[0002]

2. Description of the Related Art In a conventional wheelchair, when a person in a wheelchair eats or reads a book as it is,
It would be nice to have a table. However, if this table is fixed, it normally interferes with getting on and off the wheelchair.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a table device for convenience of use by a person in a wheelchair, which is normally removed from the wheelchair and is used when necessary. (EN) Provided is a removable table device which can be used as a table by being mounted on armrests provided on the left and right sides of a seat forming a seat of a wheelchair.

[0004]

DISCLOSURE OF THE INVENTION A removable wheelchair table device of the present invention is a table placed on armrests provided on the left and right sides of a seat forming a seat of a wheelchair. Side support portion is rotatably supported to press the lower side of the armrest to hold the table on the armrest, and the pressing is released to remove the table from the armrest. In the second state, a rotatable hook is provided, and a mechanism is provided for holding the state where the hook presses the lower side of the armrest.

As a result, the fixed table device can be removed in place of the fixed table device, can be attached and used as needed, and the table can be held in a stable state during use.

The wheelchair removable table device of the present invention is a table placed on armrests provided on the left and right sides of the seat forming the seat of the wheelchair, and the shaft support portion on the lower side of the table. A link mechanism is configured by a hook that is rotatably supported, a lever that is rotatably supported by a shaft support portion below the table, and a link member that connects the hook and the lever. A first lever for holding the table on the armrest by pressing the lower side of the armrest by the turning operation of the lever.
And a second state in which the pressing is released to allow the table to be removed from the armrest, and the link mechanism moves from the second state to the first state.
During the transition to the above state, the hook passes through the action point where the pressed state is changed to the pressed state.

Therefore, it can be detached in place of the fixed table device, can be attached and used according to the need of use, and can be conveniently used by removing it after use. Further, the link mechanism acts so that the hook passes through the point of action at which the hook switches from the released state to the pressed state during the transition from the second state to the first state, whereby the hook maintains the pressed state. . That is, a mechanism for holding the state in which the hook presses the lower side of the armrest is configured by a method in which a spring is not provided in the link mechanism. When a spring is provided, an operation against this spring force is required and it is difficult to operate. However, this configuration is effective in that the purpose can be achieved without providing a spring. Therefore, adding a spring to further increase the holding force of the table is within the scope of the present invention.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 to 12 show an embodiment of a table device of the present invention. 1 is a schematic perspective view of a wheelchair equipped with the table device of the present invention, FIG. 2 is an explanatory plan view of a left end side of the table device of the present invention in plan view, and FIG. 3 is an explanatory view of a side face of the table device of the present invention. 4 is an explanatory view of a first state of the table hook device of the present invention, FIG. 5 is an explanatory diagram of a second state of the table hook device of the present invention, and FIG. 6 is an explanatory diagram of a third state of the table hook device of the present invention. FIG. 7 is an explanatory view of the table hook device of the present invention in a plan view, FIG. 8 is an explanatory view of the table hook device of the present invention in a side view, and FIG. 9 is an explanatory diagram of another embodiment of the table hook device of the present invention. FIG. 10 is an explanatory plan view of another embodiment of the table hook device of the present invention, FIG.
1 is an explanatory view of another embodiment of the table hook device of the present invention, and FIG. 12 is an explanatory view of another embodiment of the table hook device of the present invention.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a general self-driving wheelchair, on which main wheels 3 are rotatably mounted by axles 3A on both sides of a vehicle body 2 which forms a frame 8 by connecting pipes. Left and right armrests 4 are attached to the horizontal frame 8A by screws 40, respectively, and a seat 6 that forms a seat is provided between the left and right armrests 4. From the seat 6 to the grip 5 formed in the upper rear part of the vehicle body 2. A formed backrest 7 is provided. In addition to this, a footrest 9 provided on the lower portion of the frame 8 of the vehicle body 2 extending vertically to the left and right on the front side of the wheelchair
And a caster 10 rotatably attached to the vertical frame 8 of the vehicle body 2 in front of the main wheel 3, so that a person on the wheelchair 1 attaches the wheel 11 attached to the outside of the wheel 3 with a space. Wheelchair 1 by grasping and operating
It is a self-operated structure that can be operated to move forward, backward, and rotate. This wheelchair 1 has a variety of shapes, but is generally configured on the market, and in addition to this, a brake device 12, a legrest 13 for supporting a calf of a person on the wheelchair 1, and the like are provided. There is.

The present invention provides a detachable table device 20 which is effective when applied to such a wheelchair 1.
According to the present invention, table hook devices are provided on the left and right lower sides of the table 21, whereby the table 21 is configured to be attachable to and detachable from the left and right armrests 4. Here, the table device 2 of the present invention equipped with such a table hook device.
One embodiment of No. 0 will be described. The table device 20 of the present invention is a table 21 that is placed on the armrests 4 provided on the left and right sides of a seat 6 that forms a seat of the wheelchair 1, and rotates on a shaft support portion 22 below the table 21. A link mechanism 28 is formed by a hook 23 supported movably, a lever 26 rotatably supported by a shaft support portion 25 below the table 21, and a link member 27 connecting the hook 23 and the lever 26. The first state in which the hook 23 presses the lower side of the armrest 4 to hold the table 21 on the armrest 4 by the turning operation of the lever 26, and this pressing is released to remove the table 21 from the armrest 4. The link mechanism 28 is rotatable to the second state.
Is a configuration in which the hook 23 passes through an action point at which the armrest 4 is switched from a state where the pressure is released to a state where it is pressed during the transition from the second state to the first state.

The table device 20 of this embodiment will be described in more detail below. In the link mechanism 28,
The lever 26 is provided with an operating portion 30 that is operated by fingers on one side of the shaft supporting portion 25 as a boundary, and an operating portion 32 that is rotatably connected to one end of a link member 27 and a shaft connecting portion 31 on the other side.
Is formed. The hook 23 has a substantially L-shape, and the upper end of the vertical side of the L-shape is supported by the shaft support portion 22, and the intersection of the vertical side and the horizontal side 23A is connected to the other end of the link member 27 and the shaft coupling portion. It is rotatably connected by 29. The lateral side 23A of the hook 23 serves to hold the table 21 on the armrest 4 by pressing the lower side of the armrest 4 as described later.

The shaft supporting portion 22 and the shaft supporting portion 25 are a pair of bearing sides 35 extending vertically downward from a bearing member 34 fixed to the lower surface of the table 21 by mounting screws 33.
It is constituted by shafts 22A and 25A supported horizontally.

FIG. 4 shows a case where the table 21 is attached to and detached from the armrest 4 by the table hook device of the present invention.
It will be described with reference to FIG. The state of FIG.
The table 21 is placed on the armrest 4 to attach 1. In this state, the lever 26 is at the position where the operating portion 30 is rotated in the counterclockwise direction so that the hook 23 is kept in the position deviated from the lower side of the armrest 4, and the link member 27 also moves the hook 23 in the counterclockwise direction. It is rotating.

In order to fix the table 21 to the armrest 4 from the state shown in FIG. 4, the lever 26 is rotated clockwise by the operating portion 30 so that its action is transmitted to the hook 23 via the link member 27, and the hook 23 is moved. 23 rotates clockwise. The state in the middle of this is shown in FIG.

When the lever 26 is further rotated in the clockwise direction by the operating portion 30 from the state shown in FIG. 5, its action is transmitted to the hook 23 via the link member 27, and the hook 23 is rotated in the clockwise direction. Finally, the hook 23 presses the lower side of the armrest 4. This state is a state in which the armrest 4 is sandwiched between the back surface of the table 21 and the hooks 23, whereby the table 21 is fixed on the armrest 4. This state is shown in FIG.

When the table 21 is detached from the armrest 4, the state shown in FIG. 6 can be changed to the state shown in FIG. 4 by rotating the operating portion 30 of the lever 26 counterclockwise, contrary to the above.

In the above operation, the hook 23 presses the lower side of the armrest 4 by the turning operation of the lever 26 to hold the table 21 on the armrest 4.
The first state shown in FIG.
4 is detachable from the armrest 4 and is rotatable to a second state shown in FIG. 4, and the link mechanism 28 causes the hook 23 to move from the released state to the first state during the transition from the second state to the first state. The configuration is such that it passes through the point of action for converting to the pressed state.

That is, the lever 2 is moved from the second state shown in FIG.
6 rotates clockwise, and the center Q of the shaft coupling portion 31 of the lever 26 and the link member 27 becomes the center S of the shaft coupling portion 29 of the hook 23 and the link member 27 and the shaft support portion 25 of the lever 26. The hook 23 is set so as to press the lower side of the armrest 4 as shown in FIG. 6 when passing through the line P connecting the center R upward. Therefore, even if the hook 23 tries to rotate in the counterclockwise direction due to the reaction force due to the pressing force, the lever 26 receives the clockwise rotation force,
The hook 23 cannot be removed from the state in which the lower side of the armrest 4 is pressed. To release the hook 23 from the state in which the lower side of the armrest 4 is pressed, as described above, the lever 26
Is rotated counterclockwise and the center Q of the shaft coupling portion 31 has passed the line P downward. That is, the link mechanism 28
Is a point of action at which the hook 23 switches from the pressed release state to the pressed state during the transition from the second state to the first state (the point where the center Q of the shaft coupling portion 31 intersects the line P).
Pass through.

This structure constitutes a mechanism for holding the state in which the hook 23 presses the lower side of the armrest 4 by a method in which a spring is not provided in the link mechanism 28. When a spring is provided, an operation against this spring force is required and it is difficult to operate. However, this configuration is effective in that the purpose can be achieved without providing a spring. Therefore, adding a spring to further increase the holding force of the table is within the scope of the present invention.

An elastic material 38 such as rubber is attached to the lateral side 23A of the hook 23 in order to cushion the hook 23 when pressing the lower side of the armrest 4. This makes it possible to absorb an error in the link mechanism 28, an error in the thickness of the armrest 4, and the like, which facilitates the setting of the fixed configuration of the table 21 by the link mechanism 28. Further, in a vehicle type in which the thickness of the armrest 4 is different, it is possible to cope with it by adopting the elastic material 38 having a different thickness.

The table 2 with respect to the left and right armrests 4
In order to support 1 at an appropriate position, a structure in which the attachment position of the link mechanism 28 with respect to the table 21 can be adjusted is adopted. That is, the plurality of nuts 3 fixed to the upper side of the back plate of the table 21 according to the intervals between the left and right armrests 4.
6 is provided and the bearing member 34 is mounted in that position by screwing the mounting screw 33 onto the selected one of the nuts 36. In the figure, the mounting position can be selected in three stages. In order to finely adjust the position of the bearing member 34 with respect to each of the nuts 36, there are three mounting screws 33 at the bearing member 34.
7 has a hole 37 through which the screw 33 is inserted.

9 and 10 are explanatory views of other embodiments of the table hook device of the present invention. Here, the same reference numerals as those in FIGS. 1 to 8 indicate the same functional parts,
Since the description is the same as the above, the description is omitted.
Here, what is basically different from FIGS. 1 to 8 is that a coil-shaped spring 41 that applies a clockwise acting force to the lever 26 in FIG. 9 is attached to the shaft support portion 25 of the lever 26.

As a result, the lever 26 is biased clockwise by the spring 41 in FIG.
The table 21 is placed on the armrest 4 while the lever 26 is rotated counterclockwise against 1. In this state, the lever 26 is rotated clockwise by the force of the spring 41, so that the hook 23 presses the lower side of the armrest 4 to shift to the first state in which the table 21 is held on the armrest 4. During this transition, the center Q of the shaft coupling portion 31 passes upward at the point where the center Q intersects the line P.

As described above, the configuration of FIG. 9 is similar to that of FIGS.
The spring 41 is added to the structure described in 1 above, whereby the hook 23 allows the armrest 4 to move.
The lower side is pressed to hold the table 21 on the armrest 4 and the state is held more stably. For this reason,
Basically, as described with reference to FIGS. 4 to 6, the table 21 is held on the armrest 4 by the link mechanism 28, and the spring 41 is added to stabilize the holding. For this reason, the spring 41 does not need to be provided with a very strong urging force, and the strength with which the table 21 can be removed without difficulty is appropriate.

As a mechanism for holding the state where the hook 23 presses the lower side of the armrest 4, the biasing force of the spring 41 is strengthened and the table 21 is held on the armrest 4 only by the biasing force of the spring 41. Can also be That is, in FIG. 9, with the table 21 placed on the armrest 4, the lever 26 is rotated clockwise by the force of the spring 41, and the lower side of the armrest 4 is pressed by the hook 23 to move the table 21 onto the armrest 4. The table is held in the table holding state. In this transition, the hook 23 may press the lower side of the armrest 4 before the center Q of the shaft coupling portion 31 intersects with the line P to be in a table holding state. Also in this case, basically, the table 21 is linked by the link mechanism 28.
Is held on the armrest 4.

FIG. 10 employs another embodiment in which the mounting position of the link mechanism 28 can be adjusted with respect to the table 21 in order to support the table 21 at the proper positions with respect to the left and right armrests 4. That is, in order to adjust the position of the bearing member 34 according to the distance between the left and right armrests 4, a long hole 42 that can move the position of the bearing member 34 in the left-right direction with respect to the mounting screw 33 attached to the back plate of the table 21 is formed. It is formed on the bearing member 34. Accordingly, by tightening the mounting screw 33 at the adjusted position, the bearing member 34 can be fixed to the table 21 at a position corresponding to the distance between the left and right armrests 4.

FIG. 9 shows a side 23 of the hook 23 as another technique corresponding to a vehicle model in which the thickness of the armrest 4 is different.
An adjusting screw 43 screwed into A is provided, and the protruding length of this screw 43 is adapted to correspond to the thickness of the armrest 4.

In FIG. 11, a seat member 44 made of an elastic material is provided at the tip of the adjusting screw 43 in the technique of FIG. 9 corresponding to the vehicle model in which the thickness of the armrest 4 is different. As a result, the adjusting screw 43 does not damage the lower surface of the armrest 4.

In FIG. 12, the hook 23 has an armrest 4
The table hook device having the simplest structure, in which a spring 45 is provided as a mechanism for holding a state in which the lower side is pressed, is shown. In this case, the same reference numerals as those in FIGS. 1 to 11 indicate the same functional parts, and the description thereof is the same as the above, so that the description thereof will be omitted. In this structure, a hook 23 rotatably supported by a shaft support 22 is provided below the table 21.
Is urged clockwise by the spring 45, so that the hook 23 presses the underside of the armrest 4. The configuration in which the hook 23 presses the lower side of the armrest 4 is the same as in FIG. 11. When removing the table 21, the hook 23 is rotated counterclockwise against the spring 45.

As described above, the present invention is a table placed on the armrests provided on the left and right sides of the seat forming the seat of the wheelchair, and the table is rotatable on the shaft support portion below the table. A first state in which the lower side of the armrest is pressed to hold the table on the armrest, and a second state in which the pressing is released to remove the table from the armrest is rotatable. A detachable table device for a wheelchair comprising a hook, and a mechanism for holding a state in which the hook presses the lower side of the armrest.

A table mounted on armrests provided on the left and right sides of a seat forming a seat of a wheelchair, and a hook rotatably supported by a shaft support portion on the lower side of the table, and a hook. A link mechanism is constituted by a lever rotatably supported by a shaft supporting portion below the table and a link member connecting the hook and the lever, and the hook is moved by the turning operation of the lever. The link mechanism is rotatable between a first state in which the lower side of the armrest is pressed to hold the table on the armrest and a second state in which the pressing is released to remove the table from the armrest. The wheelchair is characterized in that the hook passes through a point of action at which the hook switches from the release state to the release state during the transition from the second state to the first state. A removable table device.

As a result, it is possible to provide a removable table device which can be removed from the wheelchair at normal times and can be used as a table by mounting it on armrests provided on the left and right sides of the seat forming the seat of the wheelchair when necessary. .

The present invention is not limited to the above-described embodiment, and various modifications can be considered without departing from the technical scope of the present invention, and include various embodiments related thereto.

[0034]

According to the present invention, the fixed table device can be detached in place of the fixed table device, can be attached and used as needed, and the table can be held in a stable state during use.

A spring force can be applied to a rotatable hook that presses the lower side of the armrest, and the armrest can be sandwiched between the table and the hook.
According to the second aspect of the present invention, the link mechanism causes the hook to pass through the point of action at which the hook switches from the released state to the pressed state during the transition from the second state to the first state. The table can be held by the hook without providing the link mechanism with a spring for holding the pressed state. When a spring is provided, an operation against this spring force is required, but stable table holding can be achieved without the spring. Also in this case, addition of a spring does not prevent further increasing the holding force of the table.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a wheelchair equipped with the table device of the present invention.

FIG. 2 is an explanatory plan view of a left end side of the table device of the present invention in plan view.

FIG. 3 is a side view of the table device according to the present invention.

FIG. 4 is an explanatory diagram of a first state of the table hook device of the present invention.

FIG. 5 is an explanatory diagram of a second state of the table hook device of the present invention.

FIG. 6 is an explanatory diagram of a third state of the table hook device of the present invention.

FIG. 7 is a plan view of the table hook device of the present invention.

FIG. 8 is an explanatory diagram of a side view of the table hook device of the present invention.

FIG. 9 is an explanatory diagram of another embodiment of the table hook device of the present invention.

FIG. 10 is an explanatory plan view of another embodiment of the table hook device of the present invention.

FIG. 11 is an explanatory diagram of another embodiment of the table hook device of the present invention.

FIG. 12 is an explanatory diagram of another embodiment of the table hook device of the present invention.

[Explanation of symbols]

1 …… Wheelchair 2 ... Body 4 ... Armrest 8: Body structure frame 20 ... Table device 21 ... table 22 …… Hook shaft support 23 ... Hook 25: Lever shaft support 27 ... Link material 29: Shaft connecting part between hook and link material 31: Shaft coupling part between lever and link material 34 ... Bearing member

Claims (2)

[Claims] 1. A table mounted on armrests provided on the left and right sides of a seat forming a seat of a wheelchair,
The table is in a first state in which it is rotatably supported by a shaft support portion below it and presses the lower side of the armrest to hold the table on the armrest; A detachable table device for a wheelchair, comprising a hook rotatable to a second state for removing the table from the armrest, and a mechanism for holding a state in which the hook presses the lower side of the armrest. 2. A table mounted on armrests provided on the left and right sides of a seat forming a seat of a wheelchair,
A hook rotatably supported on a lower shaft support portion of the table, a lever rotatably supported on a lower shaft support portion of the table, and a link connecting the hook and the lever. And a first state in which the hook presses the lower side of the armrest to hold the table on the armrest by rotating the lever, and the pressing is released to release the table. The table is rotatable to a second state where the table is detached from the armrest, and the link mechanism is configured such that the hook changes from the pressure release state to the pressure state during transition from the second state to the first state. A detachable table device for a wheelchair, which is configured to pass through a point of action for conversion.