JPH0345706Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a wheelchair that can be used in narrow passages inside airplanes and cars.

[Prior Art] Japanese Patent Publication No. 61-33590 discloses a wheelchair that can be used in narrow passages inside airplanes or cars and can be folded up when not in use.

A fixed link extends under the lower toggle brace to ensure that the chair does not collapse. The fixed link is pivotally connected to the front and rear toggle braces by having its bent end pivotally connected to respective mounting tubes fixed to associated hinges of the front and rear toggle braces. The fixed link has an upwardly projecting abutment stop and a striker element in its central portion. In the assembled state, the trailing edge of the abutting element is near the front edge of the hinge of the bottom toggle brace, so either the trailing toggle brace or the front toggle brace will not collapse until the bottom toggle brace is pulled up first. . When the bottom toggle brace is pulled up, the striker plate moves slightly until the hinge passes the abutment stop, and then the rear side of the bottom toggle brace moves the striker plate backwards, causing the front and rear toggle braces to move. It has a cam-like nose arranged to begin to close.

[The problem that the idea attempts to solve]

According to the above configuration, when folding the wheelchair, it is necessary to pull up the toggle brace on the bottom side to release the engagement of the hinge with the abutment stop and the striker element, which requires a lot of effort.

Furthermore, it is necessary to provide a lifting operation rod to release the engagement relationship, resulting in problems such as a complicated structure.

[Means to solve the problem]

In order to solve the above problem, this invention has left and right side frames with wheels on the front and rear of the lower edge,
At the upper ends of the rear edges of both side frames, there are side rods with grips that can be raised and lowered in the front-rear direction and that support the lower ends that overlap the side frames when folded forward, and when these side rods are raised, the side rods are in an upright state. an engagement device provided to maintain the position, a seat sheet and a backrest sheet whose side edges are respectively supported by the upper edges of the side frames and the side rods, and opposing inner ends thereof rotatably connected. A wheelchair consisting of a rotating member whose outer ends are rotatably attached to both side frames and arranged front and back, and a connecting rod that connects the inner end of the front rotating member and the inner end of the rear rotating member. A slidable cylindrical body is fitted on the outside of the connecting rod, and both ends of two support rods arranged in a figure-eight shape in plan are rotatably attached to both sides of the cylindrical body and to both side frames. , the cylindrical body is stopped at one end side of the connecting rod as the side frames finish expanding, and a line connects the inner end connecting point of both the rotating members to the outer end connecting point of the both rotating members. This configuration adopts a configuration in which the camera is located at the rear of the vehicle.

[Effect]

To assemble the wheelchair, when the connecting rod is slid backward, both side frames are pushed apart while rotating both bi-fold rotating members into a linearly extended state.

At the end of the pushing and spreading of both side frames, the cylindrical body stops at one end of the connecting rod, and the inner end connecting points of both rotating members form a straight line connecting the outer end connecting points of the two rotating members. Because it passes by and is located at the rear,
The spread of both side frames is maintained.

〔Example〕

Embodiments of this invention will be described below with reference to the accompanying drawings.

As shown in the figure, wheels 2 are provided before and after the lower edges of the pair of left and right side frames 1, 1'.

Also, at the upper end of the rear edge of both side frames 1, 1',
The lower ends of side rods 4, 4', which have grips 5 at their upper ends, are rotatably attached via pins 3 so as to be undulating in the front and back and to overlap on the side frames 1, 1' when tilted forward. .

Furthermore, the above-mentioned both side rods 4, 4' can be maintained in the upright state by the engagement device 6 when raised to a substantially vertical position.

As shown in FIG. 8, the above-mentioned engagement device 6 has a cylindrical body 7 attached to the upper rear edge of both side frames 1, 1', and a shaft member 8 fitted into the cylindrical body 7. When a rising restoring force is applied by the spring 9 and the protruding piece 10 provided at the lower end of the shaft member 8 is grasped and pushed down, the shaft member 8 is lowered and the upper end of the shaft member 8 is moved to the side rods 4, 4'. Since it comes out through the hole 11 of the side lever 4,
4' can be folded down, and when the side bars 4, 4' are raised, the hemispherical upper end of the shaft member 8 and the lower end of the side bars 4, 4' come into contact and push the shaft member 8 back downwards. When the hole 11 and the upper end of the shaft member 8 match, the upper end of the shaft member 8 is automatically fitted into the hole 11 and engaged automatically, but an engagement device having another configuration may be adopted. .

Reference numeral 12 designates a seat whose both side edges are supported by the upper edges of both side frames 1 and 1'.

Reference numeral 13 designates a backrest seat whose both side edges are supported by both side rods 4 and 4'.

Further, the opposing inner ends of the front and rear sides of both side frames 1, 1' are rotatably connected via pins 14.
Further, a pair of left and right rotating members 16, 16' are provided which are rotatably attached to both side frames 1, 1' via pins 15.

A connecting rod 17 connects the inner ends of the rotating members 16, 16' located on the front side and the inner ends of the rotating members 16, 16' located on the rear side.

The connection of the connecting rod 17 is the connecting rod 1 in the case shown in the figure.
A plate-like body 18 is provided at both ends of the plate-like body 18.
The inner ends of the rotating members 16, 16' are attached to both sides of the rotating member 16, 16' via pins 14.
Both ends of the connecting rod 17 may be rotatably attached to the inner ends of 6' or 16, 16'.

Reference numeral 20 denotes a cylindrical body slidably fitted on the outside of the connecting rod 17, and on both sides of this cylindrical body 20 and both side frames 1, 1', both ends of support rods 21, 21 arranged in an eight-shape shape are attached. Both side frames 1, 1, are attached rotatably via pins 19, and are rotated by sliding the connecting rod 17 rearward and rotating the bi-folded rotating members 16, 16' into a linearly extended state. 1' are pushed apart in the direction of separation, and when the pushing and spreading of both side frames 1, 1' is completed, the slide of the cylindrical body 20 is stopped by the plate member 18.

At this time, the inner end connecting points of the two rotating members 16, 16' are located at the rear, passing through the straight line connecting the outer end connecting points of the two rotating members 16, 16'.

As a result, both side frames 1, 1' are maintained in a spread state.

In the figure, reference numeral 22 denotes a turning rod attached to the front edges of both side frames 1, 1', and the lower end of this turning rod 22 has a
A footrest 23 is provided which can be rotated up and down between a vertical position and a horizontal position.

The above-mentioned turning rod 22 has both side frames 1,
The upper and lower ends of a shaft 24 perpendicular to 1' are supported, and the pipe 25 of the swing lever 22 is fitted on the outside of this shaft 24, and the pipe 25 is pulled down by the spring 26, and the pipe 25 is raised together with the swing lever 22. hand,
The plate 27' whose both ends are fixed to the pivot rod 22 and the pipe 25 is attached to the hook 2 of the side frame 1, 1'.
The foot rest 23 is stopped at a fixed position by being fitted into and locked at 8'. Reference numeral 28 denotes an armrest attached to the rods 4 and 4' on both sides in a manner that it can be raised and lowered freely, and 29 is a grip rod.

In addition, the opposing distance between both side frames 1 and 1' is as follows:
The width of the aisle is narrower than the aisles inside airplanes and cars, making it possible to drive in the aisle.

When folding the wheelchair configured as described above, first operate the engagement device 6 to release the maintenance of the upright state of both side bars 4, 4', and then fold the both side bars 4, 4' so that they overlap on both side frames 1, 1'. Defeat 4'.

Next, when the gripping rod 29 is grasped and the connecting rod 17 is pulled forward, as the connecting rod 17 slides, the left and right rotating members 16, 16' are rotated so as to be bent in the middle. member 16,
The tension on both side frames 1, 1' by 16' is released, and both side frames 1, 1' are pulled together.

As a result, the bifold seat sheet 12 and backrest sheet 13 are interposed between the side frames 1 and 1', and the side frames 1 and 1' are folded so as to overlap.

In addition, when assembling the wheelchair, by sliding the connecting rod 17 backward, both the bi-fold rotating members 16,
16' is rotated so that it is in a linearly extended state, the side frames 1, 1' are pushed apart, and the connecting point of the inner ends of the two rotating members 16, 16' is aligned with the above-mentioned two rotating members 16. , 16', the sliding of the cylinder 20 stops, and the assembled state is maintained by the rotating members 16, 16' pulling both side frames 1, 1' together. be done.

〔effect〕

As described above, according to the wheelchair according to this invention, the connecting rod is slid rearward and both rotating members are rotated so as to be in a linearly extended state, and both side frames are pushed apart, and the end of the connecting rod is rotated. When the cylindrical body is stopped, the connecting points of the inner ends of both rotating members pass slightly past the straight line connecting the connecting points of the outer ends of the rotating members, so that both side frames are pushed apart, That is, the assembled state of the wheelchair can be maintained with an extremely simple configuration.

[Brief explanation of the drawing]

Figure 1 is a side view of the wheelchair according to this invention, Figure 2
The figure is a front view of the same, Figure 3 is a side view of the folded state,
Figure 4 is a front view of the same, Figures 5 and 6 are bottom views of the same, Figure 7 is an enlarged partially cutaway side view of the engagement side view, and Figure 8 is a partially cutaway side view of the attachment part of the footrest. It is an enlarged view. 1, 1'...Side frame, 2...Wheel, 3
...Pin, 4,4'...Side rod, 5...Grip,
6... Engagement device, 7... Cylindrical body, 8... Shaft material, 9
... Spring, 10 ... Projection, 11 ... Hole, 12 ...
Seat sheet, 13... Back seat, 14, 15
...Pin, 16, 16'...Rotating member, 17...
Connecting rod, 18... plate-shaped body, 19... pin, 20...
...Cylinder, 21...Support rod.

Claims (1)

[Scope of utility model registration request] The left and right side frames have wheels on the front and rear of the lower edges, and the upper ends of the rear edges of both side frames have grips that can be raised and lowered freely in the front and back direction, and that support the lower ends that overlap the side frames when folded forward. A seat seat and a backrest seat whose side edges are supported by the upper edges of the side frames and the side bars, respectively. and a rotating member arranged front and back with opposing inner ends rotatably connected and outer ends rotatably attached to both side frames, and an inner end of the front rotating member and a rear rotating member. In a wheelchair consisting of a connecting rod that connects the inner ends of the members, a slidable cylinder is fitted on the outside of the connecting rod, and is arranged in an eight-shape shape on both sides of the cylinder and on both side frames. Both ends of the two supporting rods are rotatably attached, and the cylinder body is stopped at one end of the connecting rod when the two side frames have finished expanding. is located behind a line connecting the outer end connecting points of both rotating members.