JPH08183459A - Vehicle - Google Patents

Abstract

PURPOSE: To provide a vehicle easily traveling on one or both of step difference and steps as it is in the ground level traveling state, excellent in workability, and safer compared with a conventional one with no substancial change of the original structure of the vehicle such as a truck. CONSTITUTION: A fixed caster 10 is fitted to the back face front end part of a base plate 1 in such a state that a wheel 9 is slightly protruding from the front end of the base plate 1, and a swivel caster 12 is fitted to the back face rear end part of the base plate 1. An intermediate wheel 13 is fitted to the back face longitudinal intermediate part of the base plate 1 in such a state as to be slightly lifted from the ground plane, and a supporting arm 18 with a long side 16 and a short side 17 formed in nearly L-shape and with auxiliary wheels 20, 21 rotatably fitted to an angular part 19 and the tip of the long side 16 is fitted to the back face rear end part of the base plate 1 so as to be rotatable around the tip of the short side 17, thus constituting a truck 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle including a trolley including a human power drive and a power drive, a wheelchair, a baby carriage, a work vehicle of an arbitrary shape, etc., and more particularly to a vehicle capable of running on a step or stairs. Is.

[0002]

2. Description of the Related Art Conventionally, a vehicle is mounted with wheels, for example, 3 to 6 wheels, and the vehicle is traveling with the vehicle being held substantially constant, for example, substantially horizontal. In this case, just like when driving on a flat ground, you cannot climb the step even if you push it.

[0003]

Therefore, generally, with the rear end of the carriage held down by the foot, the upper end of the handle is pulled toward the front, and the front portion of the carriage is not lifted and pushed so that the front wheels are placed on the step. After pushing the dolly further while it is on the table, the rear part of the dolly must be pushed and the rear wheels must be placed on the step, especially when the load to be carried is heavy, pull the upper end of the handle toward you. However, since the front part of the dolly cannot be lifted, it is impossible to perform all of these operations at the handle position on the rear part of the dolly, and in the end, the operator goes to the front of the dolly or returns to the back and lifts the dolly. There was a drawback that the dolly had to be placed on a step. Furthermore, a normal trolley cannot climb the stairs as it is. Therefore, in order to allow the trolley to climb the stairs, a caterpillar is attached to the trolley or three wheels with three wheels attached to each tip of the three spokes. Spoke wheels must be installed on both sides of the trolley, which not only makes the trolley heavier but also unwieldy and can fall to the bottom when you let go of the trolley. Since the weight of the baggage is applied to the arm of the worker, it cannot be done unless the worker has a considerably strong force, and it has not become popular. Therefore, an object of the present invention is to
It is an object of the present invention to provide a vehicle that is much safer, has better workability, and can easily climb a step or stairs as compared with the conventional one, even though the structure of the cart itself is relatively simple.

[0004]

That is, according to the present invention, the vehicle body is supported by wheels of a front fixed caster and a rear free caster so that the vehicle can travel. An intermediate wheel is rotatably mounted in a state of being slightly floated from the grounding surface formed by the front and rear wheels, and is a support arm in which the long side and the short side are formed in a substantially L shape at the rear of the vehicle. A support arm rotatably attached to the corner of the arm and the tip of the long side is rotatably mounted around the tip of the short side, and the support arm of the corner auxiliary wheel changes from the non-grounded state to the grounded state. By the constant rotation, the rear part of the vehicle can be supported in a state in which the rear part of the vehicle is raised in correspondence with the preset short side length corresponding to the step running of the vehicle, and the support arm is further rotated to depend on the long side of the support arm. Rear of vehicle Certain vehicle rear by the support to the vehicle to allow up to correspond to the long side length set in advance in correspondence with staircase running of the vehicle. In this case, the front wheel of the vehicle can be made to project from the front end of the vehicle body, and in the state where the front wheel of the vehicle is made to project from the front end of the vehicle body, the maximum projecting position can be moved back and forth as the return position by the spring biasing force. The rotation of the support arm can be performed by stepping with a toggle spring, and further, a handle for lifting the vehicle can be attached to an intermediate portion on the back surface of the vehicle body.

[0005]

In the case of a vehicle constructed as described above, for example, a bogie, an intermediate wheel is attached to the middle part of the back side in the front-rear direction of a conventional four-wheel bogie in a non-grounded state slightly floating from the grounding surface, and at the rear part of the vehicle. A support arm having long and short sides with auxiliary wheels integrally formed in a substantially L-shape is attached so as to be slightly above the grounding surface so as not to hinder traveling on level ground. Therefore, the trolley can be pushed on the handlebar and run on the flat ground regardless of the support arm in the same way as the conventional trolley. If there is a step in the level running state by pushing this handle, first, the front end of the base plate or the protruding front wheel hits the wall of the step to stop the cart. In this state, when you put your foot on the long side of the support arm and rotate the support arm,
The rear portion of the trolley is supported by the short side of the support arm in a state of being lifted up to a height set in advance corresponding to step running, for example, about 30 mm to 50 mm. In this case, the rotation center position of the support arm is located closer to the center in the front-rear direction of the carriage than the mounting position of the universal caster. Therefore, in this state, if you pull the handle of the trolley toward you and tilt it down, the trolley of the trolley becomes the fulcrum, and the front of the trolley becomes relatively light, even if the load on the trolley is heavy. It can be lifted, and when pushed, it will naturally rest on the step along the shape of the step if the front wheel hits the wall of the step, and if the front wheel moves back and forth, the front wheel will already spring. When it returns and is on a step, and if you push it forward and push forward, when the intermediate wheel of the truck hits the step, push the truck while pulling the handle further toward you,
When the intermediate wheel also naturally rests on the step and is pushed as it is, the support arm hits the step and returns to the spring, and the entire trolley moves to the step while traveling on a level ground. Next, in the case of stairs, with the front part of the dolly placed on the first step of the stairs by the above operation, the dolly is further advanced and the front part of the dolly is in contact with the second step wall of the stairs, and the handle is turned up. When lifted, by the urging force of the toggle spring, or when pushing the support arm with the foot while lifting the handle, the rear part of the carriage is a long side of the support arm, which is a preset height corresponding to stair running, for example, One stair height 180
The carriage is lifted by about 210 mm to 230 mm with respect to mm, and the carriage is stably supported in a substantially horizontal posture in which the carriage is tilted slightly forward on the first step of the stairs so as not to hinder the transportation of luggage.
In this state, when pushing down the rear part of the trolley via the handle, the trolley is supported by the long side of the support arm and the front wheels are located on the second step of the stairs. Therefore, while lifting the handle in this state, When pushed, the long side of the support arm is placed on the first step of the stairs, the carriage is held almost horizontally on the second step of the stairs, and the carriage is easily climbed up the stairs by repeating the above operation. be able to. Here, even if the trolley is an arbitrary vehicle such as a wheelchair, a baby carriage, or a work vehicle, it is possible to obtain the same action and effect as the above.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction of the first embodiment of the present invention will be described with reference to FIGS. Vehicles including manual and power drives, vehicles such as baby carriages and wheelchairs, in this case, foldable by rotating on a platform bracket 2 on a platform 1 about an axis 3, and
A wheel bar 9 is attached to the front end of the rear surface of the base plate 1 of the carriage 8 to which the gate-shaped handle 7 is attached so that the lock bar 6 that can be moved up and down by the urging force of the stopper 4 and the spring 5 and stepping on and off can be held upright. 1 A fixed caster 10 is attached in a state of slightly protruding from the front end by, for example, 20 mm, and a free caster 12 that rotatably supports wheels 11 is attached to the rear end of the back surface of the base plate 1, and the front and rear surfaces of the back surface of the base plate 1 are attached. An intermediate wheel 13 is rotatably attached to an intermediate portion in the direction via an intermediate bracket 14 and a shaft 15 while being slightly floated from a ground contact surface formed by the front and rear wheels 9 and 11. On the other hand, at the rear end of the back surface of the base plate 1, a support arm 18 having a long side 16 and a short side 17 formed in a substantially L shape,
A support arm 18 having auxiliary wheels 20 and 21 rotatably attached to the corner portion 19 and the tip of the long side 16 is rotatably mounted around the tip of the short side 17 of the rear bracket 22 and the shaft 2.
The support arm 18 is mounted via the support arm 18, and the rear portion of the bogie 7 travels on the short side 17 of the support arm 18 at a step due to the constant rotation of the corner auxiliary wheel 20 changing from the non-grounded state to the grounded state. Correspondingly, it is mounted so as to be supported in a state where it is lifted up to a preset height, for example, about 30 mm to 50 mm, and the support arm 18 is further rotated to support the rear side of the carriage 7 by the long side 16 of the support arm 18, thereby supporting the carriage. The rear part of 7 has a preset height corresponding to stairs traveling, for example, 210 mm for a height of 180 mm for one staircase.
It can be lifted by about mm to 230 mm. A reinforcing stay 25 is attached between the long side 16 of the support arm 18 and the rotation center shaft 23 of the support arm 18 via a shaft 24, and the shaft 24 and the rear bracket 2 at the left and right positions of the base plate 1 are attached.
Between the shaft 26 attached between the two shafts 23, 2,
A toggle spring 27 having a line connecting 4 and 26 in a straight line as a dead line is attached, and a foot bar 28 and a gate-shaped operation bar 29 for operation are attached between the left and right long sides 17 of the support arm 18, Further, a handle 30 for lifting the dolly 8 is attached to an intermediate portion of the back surface of the base plate 1 via a shaft 26.

Next, the operation of this embodiment will be described with reference to FIGS. In the case of the bogie configured as described above, the intermediate wheel 13 is attached to the middle part of the back side in the front-rear direction of the conventional four-wheel bogie in a non-grounded state slightly floated from the grounding surface, and the auxiliary wheel is attached to the rear part of the base plate 1. A support arm 18 in which a long side 16 and a short side 17 with 20 and 21 are integrally formed in a substantially L-shape is attached so as to be slightly floated from the grounding surface so as not to hinder traveling on a flat ground. 8 can push on the handle 7 and travel on a level ground without any difference from the conventional cart regardless of the support arm 18. When the handle 7 is pushed, the step 31
If there is, first, the front wheel 9 that protrudes from the wall 3 of the step 31
Upon hitting 2, the carriage 8 stops as shown in FIG. In this stopped state, when the foot is put on the foot bar 28 of the support arm 18 to rotate the support arm 18 against the urging force of the toggle spring 27, the rear portion of the carriage 8 is moved to the support arm 18 as shown in FIG. The short side 17 is supported in a state where it is lifted up to a predetermined height corresponding to the step 31 running, for example, about 30 mm to 50 mm. In this case, the rotation center position of the support arm 18 is located closer to the center in the front-rear direction of the carriage 8 than the mounting position of the universal caster 12.
Therefore, in this state, as shown in FIG. 5, when the handle 7 of the carriage 8 is pulled toward the front and tilted down, the rotation center of the support arm 18 of the carriage 8 serves as a fulcrum of the lever, and the front portion of the carriage 8 is raised by at least the step 31. By the way, even if the load on the dolly 8 is heavy, it can be lifted relatively lightly, and when it is pushed as it is, the front wheel 9 hits the wall 32 of the step 31, as shown in FIG. Is naturally placed on the step 31 along the shape of the step 31, and when further pushed and moved forward, as shown in FIGS. 7 to 9, when the intermediate wheel 13 hits the step 31, the handle 7 is moved further forward. When the dolly 8 is pushed while pulling, the intermediate wheel 13 also naturally rests on the step 31, and when it is pushed as it is, the support arm 18 hits the step 31 and returns to the spring, and the entire dolly 8 is placed on the step 31 in the flatland traveling state. To Row. Next, in the case of the stairs 33, the front part of the carriage 8 is moved to the stairs 3 as shown in FIG.
As shown in FIG. 11, the dolly 8 is mounted on the first stage of No. 3
Is further advanced to lift the handle 7 upward while the front part of the carriage 8 is in contact with the wall 34 of the second step of the stairs, the support arm 18 is lifted by the biasing force of the toggle spring 27 or while lifting the handle 7. When pushed in, the rear part of the carriage 8 is moved to the stairs 3 by the long side 16 of the support arm 18.
A preset height corresponding to three runs, for example stairs 33
210 mm to 230 m for a height of 180 mm per step
The carriage 8 is lifted by about m, and is stably supported in a substantially horizontal posture on the first step of the stairs 33, which is slightly inclined forward so as not to hinder the transportation of luggage. In this state, when the rear portion of the truck 8 is pushed down via the handle 7 as shown in FIG. 12, the truck 8 is supported by the long side 16 of the support arm 18,
The front wheel 9 is located on the second step of the stairs 33. Therefore, when the handle 7 is pushed while being lifted as shown in FIG. 13 in this state, the long side 16 of the support arm 18 is on the first step of the stairs 33. The carriage 8 is held substantially horizontally on the second stage of the stairs 33, and the carriage 8 can easily climb the stairs 33 by repeating the above operation. Here, even if the carriage 8 is an arbitrary vehicle such as a wheelchair, a baby carriage, or a work vehicle, the same action and effect as described above can be obtained.
If no load is placed on the dolly 8 or if the load is light on the dolly 8, as shown in FIG. 14, the operator puts his / her foot on the rear end of the dolly 8 and tilts the handle 7 forward. It is also possible to drive the dolly 8 on the step 31. When the ground contact surface is inclined, such as on a slope, the support arm 18 is rotated with the front and rear direction of the carriage 8 perpendicular to the inclination direction of the ground contact surface, and the rear portion of the carriage 8 is supported by the support arm 18. By supporting the short side 17, the movement of the carriage 8 due to its own weight can be prevented. Further, in this embodiment, since the support arm 18 is inside and the free caster 12 is outside, even if the free caster 12 is provided with a brake, the operator can easily operate the brake in a standing posture. The support arm 1 with the free caster 12 inside
When the width of 8 is wide, the carriage 8 by the support arm 18
The running posture of the step 31 and the running posture of the stairs 33 can be further stabilized. Further, when the rear wheels of the conventional four-wheeled truck are used as the free casters, even if the auxiliary wheels 20 of the present embodiment are fixedly attached after the free casters in a state of slightly floating from the ground contact surface, the step 31 traveled by the truck Can be made much easier. Next, FIG. 15 shows a second embodiment of the present invention.
In this embodiment, in this case, the fixed caster 10 of the first embodiment is moved to the front wheel 38 by rotating the wheel arm 37 about the shaft 36 against the biasing force of the spring 35 by θ degrees. S-swing is made possible, whereby the front wheel 38 is placed on the step 31 and stairs 33 when the front wheel 38 is located on the step 31 and stairs 33, and the carriage 39 travels the step 31 and the stairs 33. The structure, action, and effect are almost the same as in the case of the first proposed embodiment except that they are made easier. Next, FIGS. 16 and 17 show the third embodiment of the present invention.
This is an embodiment, and in this case, the fixed caster 10, the free caster 12, the intermediate bracket 14 of the intermediate wheel 13 and the rear bracket 2 for mounting the support arm 18 of the first embodiment.
2 is attached to the caster mounting screw hole of the conventional trolley 40 via a bolt (not shown)
Attach to the conventional trolley 40 as an adapter via
The configuration, operation, and effect are almost the same as in the case of the first embodiment except that a new carriage 42 is used. In the first and third embodiments, even if the front wheel 9 is inside the base plate 1, the effect of the present invention can be obtained although the effect is slightly reduced, and the support arm 18 is provided. Can be driven externally by a hand or a motor in addition to the driving operation by the foot. Further, by removing the auxiliary wheels 20 from the support arm 18, the step traveling function is eliminated and only the stair traveling function is provided, so that the overseas travel is possible. It can also be attached to a large bag, baby carriage, wheelchair, etc.

[0008]

As a result, according to the present invention, the horizontal structure of the vehicle itself such as a trolley is hardly changed, and it is much safer than the conventional one, and the workability is good. Alternatively, there is an effect that both can be easily traveled.

[Brief description of drawings]

FIG. 1 is a side view of a dolly 8 according to a first embodiment of the present invention, and in this case, a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a plan view of the dolly 8 according to the present embodiment with the handle 7 removed.

FIG. 3 is an operation explanatory diagram of the present embodiment.

FIG. 4 is an operation explanatory diagram of the present embodiment.

FIG. 5 is an operation explanatory diagram of the present embodiment.

FIG. 6 is an operation explanatory diagram of the present embodiment.

FIG. 7 is an operation explanatory diagram of the present embodiment.

FIG. 8 is an operation explanatory diagram of the present embodiment.

FIG. 9 is an operation explanatory diagram of the present embodiment.

FIG. 10 is an operation explanatory diagram of the present embodiment.

FIG. 11 is an operation explanatory diagram of the present embodiment.

FIG. 12 is an operation explanatory diagram of the present embodiment.

FIG. 13 is an operation explanatory diagram of the present embodiment.

FIG. 14 is an operation explanatory diagram of the present embodiment.

FIG. 15 is an explanatory diagram of a second embodiment of the present invention.

16 is a side view of the truck 42 according to the third embodiment of the present invention, and in this case, is a sectional view taken along the line BB of FIG.

FIG. 17 is a plan view of the trolley of the present embodiment with the handle relation removed.

[Explanation of symbols]

 1 base plate 2 upper bracket 3 axis 4 stopper 5 spring 6 lock bar 7 handle 8 cart 9 wheel 10 fixed caster 11 wheel 12 universal caster 13 intermediate wheel 14 intermediate bracket 15 axis 16 long side 17 short side 18 support arm 19 corner 20 Auxiliary Wheel 21 Auxiliary Wheel 22 Rear Bracket 23 Axis 24 Axis 25 Stay 26 Axis 27 Toggle Spring 28 Stepping Bar 29 Operating Bar 30 Handle 31 Step 32 Wall 33 Stair 34 Wall 35 Spring 36 Axis 37 Wheel Arm 38 Wheel 39 Truck 40 Truck 41 Auxiliary frame 42 dolly

Claims (5)

[Claims] 1. A ground plane formed by front and rear wheels at an intermediate portion in the front and rear direction of a vehicle such as a trolley and a wheelchair including a manual and power drive in which a vehicle body is movably supported by wheels of a front fixed caster and a rear free caster. An intermediate wheel is rotatably attached in a slightly floating state, and a support arm having a long side and a short side formed in a substantially L shape at the rear of the vehicle, and assists at a corner and a tip of the long side of the support arm. A support arm having a wheel rotatably mounted is rotatably mounted around the tip of its short side, and the support arm is fixedly rotated when the corner auxiliary wheel changes from the non-grounded state to the grounded state, and the rear part of the vehicle is rotated. Corresponding to the short side length set in advance corresponding to the step running of the vehicle, the support arm is further rotated to support the rear part of the vehicle by the long side of the support arm so that the rear part of the vehicle corresponds to the stairs of the vehicle. Foresight A vehicle that can be upgraded according to the long side length that has been set. 2. The vehicle according to claim 1, wherein a front wheel of the vehicle projects from a front end of the vehicle body. 3. The vehicle according to claim 1, wherein the front wheel of the vehicle can be moved back and forth with the maximum protruding position as a return position by a spring biasing force in a state of protruding from the front end of the vehicle body. . 4. The method according to claim 1, wherein the rotation of the support arm is performed by a toggle spring and stepping.
Alternatively, the vehicle according to claim 3. 5. A vehicle-lifting handle is attached to an intermediate portion of the rear surface of the vehicle body.
Alternatively, the vehicle according to claim 4.