JPH07101366A - Vehicles that can be stepped and adapters for stepping the vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to easily travel on a step or at least two or three steps of stairs, and in some cases, while maintaining the horizontal posture of the frame of a load or person, for example, the load carrier. An object of the present invention is to provide a step-traveling vehicle that can easily travel on a step or stairs and a step-traveling adapter for the vehicle. [Structure] A foldable wheeled stick is attached to the rear of a vehicle such as a baby carriage, wheelchair, or trolley, and the front wheel of the vehicle is projected from the tip of the vehicle. Install.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley used for transporting an object to be transported to a truck or unloading luggage from the truck, or a vehicle such as a baby carriage, wheelchair for carrying a person. In addition, the present invention relates to a step-travelable vehicle and a step-travel adapter for the vehicle that can easily step over a step or carry a step traveling up and down stairs while carrying objects to be transported such as luggage and people.

2. Description of the Related Art Conventionally, an external person moves a vehicle such as a baggage of an object to be conveyed, a trolley on which a person is placed, a baby carriage, a wheelchair, etc. while an outside person holds his / her hand on the handle.

[Problems to be Solved by the Invention] In this case, when the vehicle is traveling on a flat ground, and the load is relatively light, or the weight is constant to some extent like a baby carriage or a wheelchair. Allows the vehicle to travel smoothly over bumps even if there is a step, but in the case of a trolley with heavy luggage, the trolley is lifted by pulling the handle in front of the bump and raising the front of the trolley. Even if you try to press, the dolly will return, you will not be able to run the dolly with the front part raised, and you will not be able to cross the step with your hands on the steering wheel. A person goes to the front of the dolly, pulls it while lifting the front of the dolly, puts the front part of the dolly on the step, and then the worker goes after the dolly and pushes the dolly through the handle to move it. The rear wheel of the truck hits the step If you do not push the carriage while pushing it up, you will not be able to run the carriage on steps, let alone when carrying luggage or people, or even when it is empty, staircase the carriage, baby carriage, wheelchair, etc. It is virtually impossible to drive. However, in the case of a building, there are many cases where there are two or three stairs or five or six stairs between the elevator hall and the entrance of the building, so it is very troublesome and laborious to carry in and carry out luggage to and from the building. However, there was a drawback that the luggage would have to be removed from the dolly, carried individually up and down the stairs, and then loaded again on the dolly. Therefore, an object of the present invention is to make it possible to easily climb over a step while holding a hand on a handle even when the weight of a transported object is heavy, and to ascend and descend stairs with the transported object mounted. It is an object of the present invention to provide a vehicle capable of step travel and an adapter for step travel of the vehicle. In addition,
The inventions described below all include the invention of the vehicle filed by the applicant of the present application on January 11, 1993.

[Means for Solving the Problem] That is, the first
A second invention is a vehicle in which a vehicle body whose front and rear are supported by wheels is pushed by a hand through a handle mounted on the vehicle body to move, and which is provided with a front projecting wheel projecting from a front surface of the vehicle body, and a front and rear center of the vehicle body. A vehicle capable of stepping is provided with an intermediate wheel for supporting the vehicle body on the step at least when the vehicle travels on the step. A second aspect of the present invention is a step traveling adapter for a vehicle, which is equipped with a front protruding wheel and an intermediate wheel that can be attached to an existing vehicle. A third aspect of the invention is a vehicle in which a vehicle body whose front and rear are supported by wheels is pushed by hand through a handle attached to the vehicle body, and the rear portion of the vehicle body is moved up the stairs when the vehicle is running on stairs. This is a vehicle capable of stepping with rear supporting legs with wheels for supporting mounted so as to be able to retract when not needed. A fourth aspect of the present invention is a step traveling adapter for a vehicle, which is equipped with a rear support leg with a wheel that is attached to an existing vehicle so that it can be retracted when unnecessary. A fifth aspect of the present invention is a step-travelable vehicle in which a lift that is vertically expandable and contractible by an external operation is attached to the back surface of a vehicle body whose front and rear are supported by wheels so as to be slidable in the front-rear direction. Further, a sixth aspect of the present invention is, when the rear supporting legs for supporting the rear portions of the rear portion of the vehicle body and the rear portion of the lower frame of the lift for traveling the stairs while holding the vehicle body in a substantially horizontal posture are unnecessary. It is on a vehicle that can be stepped and is mounted so that it can be retracted.

[Operation] In the case of the first aspect of the invention, when there is a step in the front while the vehicle on which the object to be transported is placed is being pushed by the hand through the handle to move, the front protruding wheel of the vehicle is the first. Hit the stepped wall. In this state, while keeping the front protruding wheel hitting the wall of the step while tilting the handle toward you and raising the front part of the vehicle, the front protruding wheel climbs on the step as it is and pushes the vehicle as it is to move forward, Next, the middle wheel hits the wall of the step,
While keeping this state, if the steering wheel is further tilted toward you and the front part of the vehicle is raised, the intermediate wheels also climb up the steps. In this state, since the vicinity of the center of gravity of the vehicle is supported on the step via the intermediate wheel, the vehicle can move forward without lifting the rear portion. The above operation is the same in the vehicle in which the adapter is attached in the second aspect of the invention. Next, in the case of the third invention, when the front portion of the vehicle is raised and the rear support legs with wheels are taken out in a state in which the front wheels of the vehicle are placed on one or two steps of the stairs, the vehicle is shaped like a long-legged two-wheel vehicle. become. As a result, it is possible to climb the stairs while alternately riding the front wheels and the wheels of the rear supporting legs of the vehicle on the upper stairs, and it is also possible to descend the stairs backwards in the same manner. The above operation is the same in the vehicle in which the adapter is attached in the fourth aspect of the invention. Next, the fifth
In the case of the second aspect of the invention, in the state where the front surface of the vehicle in the middle of forward movement hits the wall of the step, the lift is raised by an external operation such as tilting the handle toward you, and the entire vehicle except the lift is positioned higher than the step. Slide the entire vehicle, excluding the lift, forward to position it on the step. Next, after returning the lift, it is slid and stored on the rear surface of the vehicle body, and the vehicle can travel on the step as it is. In this case, the vehicle body is always maintained in the horizontal posture. Next, the sixth
In the case of the second aspect of the invention, in the state where the front of the vehicle in the course of forward movement hits the first step of the stairs, after lifting up and sliding the car body, the rear support legs of the rear part of the car body are taken out and the car body is leveled on the stairs. In this supported state, the lift is lowered and then slid to return to the center of the rear surface of the vehicle body, and then the rear support legs are extended to support the lift on the stairs. By repeating the lift-up, the body slide, and the lift-back with the rear support legs in this way, the vehicle can climb the stairs while holding the body horizontally.
By the reverse action, the vehicle can go down the stairs while holding the vehicle body horizontally.

[Embodiment] Next, the construction of a first embodiment of the present invention will be described with reference to FIGS. On the vehicle body, in this case, on the front back surface of the base plate 1, front protruding wheels in which a part of the wheels are projected from the front surface of the base plate 1, in this case, fixed casters 2 are attached, and on the rear rear surface of the base plate 1 a little. The flexible caster 3 is retracted and attached, and the base plate 1 is grounded and supported by the fixed caster 2 and the flexible caster 3. On the other hand, at the intermediate position between the fixed caster 2 and the swivel caster 3 on the back surface of the base plate 1 and at the rear position of the swivel caster 3, 5 to 10
A fixed intermediate caster 4 and a fixed rear caster 5 are attached with a distance of about mm. Further, the bracket 6 at the rear surface position of the base plate 1 is rotatable about the shaft 7 from the solid line state of FIG. 1 to the two-dot chain line state, and the solid line state of FIG. At the base portion of the handle 8 that is mounted so as to be locked / unlocked with, the shaft 10 on the bracket 9 is centered to change from the solid line state in FIG. 1 to the two-dot chain line state against the biasing force of a toggle spring (not shown). A stick 11 is rotatably mounted, and a fixed caster 12 is mounted on the upper end of the stick 11.

Next, the operation of this embodiment will be described.
In the case of the vehicle constituted in this way, in this case, the cart 13 of the hand-held vehicle, when the handle 8 is set to the solid line state shown in FIG. 1 from the folded state of the two-dot chain line handle 8 shown in FIG.
The handle 8 is locked by the lock / unlock device in this solid line state, and in this state, the stick 11 is in the solid line state shown in FIG. 1 by the urging force of the toggle spring 10. In this state, when luggage is loaded on the base plate 1 and the handle 8 is pushed, the carriage 13 moves forward while being supported by the fixed casters 2 and the free casters 3. If there is a step 14 in the course of this forward movement, in the carriage 13, the fixed caster 2 protruding forward from the base plate 1 first hits the front surface of the step 14. Therefore,
In this state, pushing the carriage 13 forward and tilting the handle 8 toward you as shown in FIG.
By moving along the carriage 4, the front part of the carriage 13 is placed on the step 14, and in this state, the carriage 13
Is tilted and is supported by the rear casters 5 of the fixed casters as well as the front and rear fixed casters 2, and the dolly 13 can be stably advanced even when tilted, and when the dolly 13 is further advanced, the intermediate caster 4 hits the front surface of the step 14. . Therefore, if the handle 8 is pushed forward as shown in FIG. 4 while pushing the carriage 13 forward in this state, the intermediate caster 4 moves along the step 14, and the intermediate caster 4 is placed on the step 14. When the handle 8 is pushed forward in this state, the carriage 13 moves on the step 14 while rotating around the intermediate caster 4 as a fulcrum, and can move forward in the horizontal posture. Next, if there is a staircase 15 while the carriage 13 is moving forward, the carriage 13 will move in the same manner as the step 14 and the fixed casters 2
Is placed on the first and second steps of the stairs 15 and, in this state, the stick 11 is tilted to the front as shown in FIG. 5 against the biasing force of the toggle spring. In this state, put one foot on the step 16 of the walking stick 11 and push it,
Push the handle 8 upwards, and then press the fixed caster 2
Is clamped on the front of the second and third steps of stairs 15,
With the fixed caster 2 position serving as a fulcrum, the stick 11 is shown in FIG.
It is stabilized by the biasing force of the toggle spring in the state shown by the solid line. Therefore, when the handle 8 is tilted toward the front while keeping the foot on the step 16 in this solid line state and the carriage 13 is moved forward while the center of gravity of the carriage 13 is positioned on the fixed caster 12 of the stick 11, the fixed caster of the carriage 13 is moved. When 2 rides on the upper stairs 15 and pushes the trolley 13 in this state, the handle 8 is pushed upwards, and the fixed caster 2 serves as a fulcrum to move the trolley 13 one step above the stairs 15 as described above. By raising the stairs 15, the carriage 13 can climb up and down the stairs 15 relatively easily. By returning the stick 11 to the solid line state shown in FIG. Can run horizontally as it is. When the truck 13 descends the stairs 15, as shown in FIG. 7, when the rear part of the truck 13 is projected onto the stairs 15, the walking stick 11 is brought into a solid line state so that the truck 13 is fixed. It is possible to easily get down while being supported by 12 and 12.

Next, FIG. 8 shows a second embodiment of the present invention. In this case, a tire type having a large diameter, for example, an air pressure, which is always in contact with the back surface of the base plate 17 at a substantially central position in the front-rear direction is used. The fixed caster 18 and the base plate 1 have a relatively small diameter in a state of protruding from the base plate 17 to the front position of the fixed caster 18 and the base plate 17.
A fixed caster 20 having a relatively small diameter is also attached to the rear position of 7, and straight traveling is performed by grounding between the central fixed caster 18 and one of the front and rear fixed casters 19 or 20, and turning traveling is performed only by the central fixed caster 18. The configuration, action, and effect are almost the same as those of the first embodiment except that they are performed. By attaching a stopper arm (two-dot chain line) 16 that is biased in the direction of the two-dot chain line arrow to the front and back sides of the base plate 17 to prevent running trouble, the automatic braking is performed when the vehicle is stopped. Can also be formed. Further, it can be locked in a horizontal position when not in use.

In front of the carriage 13 in the first embodiment,
The casters 2 and 4 in the center are added to the conventional four-wheeled trolley, and can be attached to the back surface of the base plate as an adapter so that they are slightly floated so as not to touch the ground during horizontal traveling. The sticks 11 and 21 in the second embodiment can also be attached to the conventional four-wheeled trolley as an adapter to the handles 8 and 22, and as shown in FIG. 9, the handles 8 and 22 are inside and the sticks 11 and 21 are outside. It is also possible to attach the bracket 24 on the base plate 23 coaxially 25. or,
The walking sticks 11 ′ and 21 ′ are foldable and can be attached to the baby carriage 26 as shown in FIG. 10 or to the wheelchair 27 as shown in FIG. 11, in which case both the baby carriage 26 and the wheelchair 27 can be mounted by one person. You can go up and down stairs with the helper of.

Next, the configuration of the third embodiment of the present invention is shown in FIG.
~ It demonstrates by FIG. A front stay 30 in which free casters 29 are attached to both ends of the U-shaped bent pipe 28,
A handle 34 is provided on the back surface of a base plate 33 which is supported by a rear stay 32 having a fixed caster 31 attached to the pipe 28 and a lock / unlock device (not shown) so as to be adjustable in height.
An X pantograph type lift 35 that is lifted up by tilting the front side is attached to the base plate 33 so as to be slidable in the front-rear direction. That is, the main arm 37 and the sub arm 38 whose central portions are connected by the shaft 36
Rotatably attached to the upper frame 39 and the lower frame 40 via a shaft 41, respectively, and the rear ends of the main arm 37 and the sub arm 38 are respectively attached to the lower frame 4.
0 and the upper frame 39 are slidably mounted via wheels 42, and the lift 35 is lifted up by pulling the handle 34 integrally mounted with the main arm 37 forward. The rotatably mounted wheel 43 is mounted in a state in which it is slidably fitted in a groove 45 of a base frame 44 mounted on the back surface of the base plate 33. The base plate 33 is a lift 3
5 is always biased rearward by a spring (not shown) and hits a stopper (not shown) to stop in a solid line state. Further, fixed casters 4 for traveling with the base plate 33 lifted up are provided at the front and rear positions of the lower frame 40.
6 is attached, and at the rear position of the lower frame 40, a stick 47 for supporting the lower frame 40 in a horizontal posture on the stairs is provided downward from a vertical posture in a vertical direction against the biasing force of a toggle spring (not shown). It is mounted so that it can be rotationally displaced in a vertical position. Further, at the front position of the upper frame 39, the lift 35 is lifted up before the step and the base plate 33 is lifted.
While the lift 35 is being lifted, the lift 35 is advanced to the contact position with the step, and only the base plate 33 is advanced.
A fixed caster 48 is mounted for supporting the central portion of the base plate 33 on the step so that the rear portion of the base plate 33 does not fall even when the base plate 33 is returned (lifted down).

Next, the operation of this embodiment will be described.
In the thus configured horizontal carriage 49, when the handle 34 is in an upward vertical posture, the lift 35 is moved to the base plate 33.
The lift piece 35 is not lifted up because the engaging piece 50 protruding from the handle 34 is engaged with the base plate 33 in this state when it is stored in the lift-down state on the back surface, and therefore the carriage 49 stays forward and backward. 30 and 32 casters 2
It is possible to run horizontally while being supported by 9, 31. Next, in this forward state, the base plate 33 or the flexible caster 2
When 9 is in contact with the front surface of the step, the lift 35 is pulled backward while the position of the base plate 33 remains the same, or the base plate 33 is slightly slid forward by the foot to engage the engagement piece 50 with the base plate 33. When unraveled, the lower frame 40 of the lift 35 falls, and the handle 34 also falls toward the front by that amount, which makes it easier to mechanically lift up. Handle 34 in this state
To bring the base plate 33 up and lift the base plate 33
When only the chisel is pushed forward with the foot to slide and the lift 35 is also moved forward, the fixed caster 4 of the upper frame 39 is moved.
8 also rests on the step along with the front half of the base plate 33. In this state, when the handle 34 is returned to the upper vertical posture and pushed, the lift 3
5 is accommodated on the back surface of the base plate 33, and the carriage 49 can move from the lower step position to the upper step position in a horizontal posture and travel on a step. In addition, when climbing over this step, the rear stay 32 can be lowered simultaneously with the lift-up, and the lift 35 can be stored on the back of the base plate 33 in a more stable state. In this case, the upper frame 39 The fixed caster 48 function becomes unnecessary. Next, when the carriage 49 reaches the stairs, the rear stay 32 is lowered and the base plate 3 is lifted in a state where the base plate 33 is lifted up and placed on the second and third stairs.
While holding the horizontal posture of No. 3, after lifting down in this holding state, the stick 47 is brought to the downward vertical posture, and in this state, lifting up, sliding of the base plate 33, lifting down, and storage of the lift 35 are repeated, whereby the truck 49
Can be moved up in the horizontal posture, and by performing the reverse operation, the carriage 49 can be moved down in the horizontal posture. Further, the carriage 49 can be used as a wagon by lowering and locking the front and rear stays 30, 32 to the casters 29, 31 in the grounded state while the carriage 49 in the horizontal posture is lifted up.
In addition, by turning on the brakes of the casters 29 and 31 in a horizontal posture on the stairs, a stepladder is placed on the carriage 49 in the horizontal posture, and the trolley 49 is effectively used as a work tool on the stairs. The carriage 49 may be applied to a baby carriage, a wheelchair, or the like. In addition, by moving the lift 35 up and down and sliding the base plate 33 electrically, it is possible to further facilitate the stairs up and down of vehicles such as the carriage 49, the baby carriage, and the wheelchair.

[Effects of the Invention] As a result, the present invention has the effects of facilitating the step running of the vehicle and of being able to go up and down stairs.

[Brief description of drawings]

FIG. 1 is a side view of a carriage 13.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is an explanatory diagram showing a traveling state of a step 14 of a carriage 13.

FIG. 4 is an explanatory diagram showing a traveling state of the step 14 of the carriage 13.

FIG. 5 is an explanatory diagram showing a state in which the truck 13 climbs up the stairs 15.

FIG. 6 is an explanatory diagram showing a state in which the truck 13 is moving up the stairs 15.

FIG. 7 is an explanatory diagram showing a state where the carriage 13 descends the stairs 15.

FIG. 8 is a side view of a truck according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a truck according to another embodiment.

FIG. 10 is a side view of the baby carriage 26.

11 is a side view of the wheelchair 27. FIG.

FIG. 12 is a side view of a carriage 49.

13 is a view on arrow B of FIG.

FIG. 14 is a partially enlarged detailed view of FIG.

FIG. 15 is an explanatory diagram showing a staircase traveling posture of a carriage 49.

[Explanation of symbols]

 1 base plate 2 fixed caster 3 universal caster 4 intermediate caster 5 rear caster 6 bracket 7 axis 8 handle 9 bracket 10 axis 11 stick 12 fixed caster 13 trolley 14 steps 15 stairs 16 steps 17 base plate 18 fixed caster 19 fixed caster 20 fixed caster 21 Walking Stick 22 Handle 23 Base Plate 24 Bracket 25 Axis 26 Baby Carriage 27 Wheelchair 28 Pipe 29 Flexible Casters 30 Front Stay 31 Fixed Casters 32 Rear Stay 33 Platform Plate 34 Handle 35 Lift 36 Axis 37 Main Arm 38 Sub Arm 39 Upper Frame 40 Lower Frame 41 Axis 42 Wheel 43 Wheel 44 Unit Frame 45 Groove 46 Fixed Castor 47 Stick 48 Fixed Castor 49 Horizontal Cart 50 Engagement Piece

Claims (11)

[Claims] 1. A vehicle for moving a vehicle body, the front and rear of which are supported by wheels, by means of a handle mounted on the vehicle body by hand, comprising forward projecting wheels projecting from a front surface of the vehicle body and a front and rear center of the vehicle body. A step-travelable vehicle, characterized in that at least a middle wheel for supporting the vehicle body on a step is provided in a portion when the vehicle travels on the step. 2. A vehicle having front, rear, and intermediate wheels, and is a vehicle that travels in a grounded state of only front and intermediate wheels, rear and intermediate wheels, and intermediate wheels, respectively. The vehicle capable of stepping according to claim 1. 3. A front projecting wheel mounted so as to project from a front surface of a vehicle body of a vehicle which is manually moved by a handle mounted on the vehicle body, the front and rear wheels of which are supported by wheels, and a front and rear central portion of the vehicle body. A step traveling adapter for a vehicle, comprising at least an intermediate wheel that is mounted so as to support a vehicle body on the step when the vehicle travels on the step. 4. A vehicle for moving a vehicle body whose front and rear are supported by wheels by pushing manually with a handle mounted on the vehicle body, and a wheel for supporting the rear portion of the vehicle body on the stairs when the vehicle is running on stairs. A vehicle capable of stepping, wherein the rear supporting legs are attached so that the rear supporting legs can be retracted when unnecessary. 5. The step-driving vehicle according to claim 1, 2, or 4, wherein the vehicle is a bogie. 6. The step-driveable vehicle according to claim 1, 2, or 4, wherein the vehicle is a baby carriage. 7. The step-travelable vehicle according to claim 1, 2, or 4, wherein the vehicle is a wheelchair. 8. A vehicle body, the front and rear sides of which are supported by wheels, is attached to a vehicle body rear portion of a vehicle which is pushed and moved by a hand through a handle attached to the vehicle body so as to be retractable when unnecessary, and when the vehicle runs on stairs. A step traveling adapter for a vehicle, comprising rear supporting legs with wheels for supporting a rear portion of a vehicle body on stairs. 9. A rear surface of a vehicle body, the front and rear of which are supported by wheels,
A step-travelable vehicle characterized in that a lift that can be vertically expanded and contracted by an external operation is attached so as to be slidable in the front-rear direction. 10. The step traveling according to claim 9, further comprising an intermediate wheel capable of supporting the vehicle body on the uppermost step of the step or stairs when the vehicle travels on the uppermost step of the step or stairs. Possible vehicles. 11. A rear support leg for supporting the rear portion of each of the rear portion of the vehicle body and the rear portion of the lower frame of the lift for supporting the rear portion of each of the rear portions when traveling on stairs while holding the vehicle body in a substantially horizontal position so as to be retractable when not needed. The step-travelable vehicle according to claim 10, wherein