JPS629175Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle for transporting luggage, etc., and in particular, to a vehicle that is lightweight and foldable and has excellent safety and stability when going up and down stairs.

BACKGROUND OF THE INVENTION Conventional jogging cars, strollers, and other hand-push carts have configurations that primarily take into consideration stability and operability when traveling on flat land. For example, a wheel is attached to each end of two parallel axles arranged at a predetermined distance, and a cargo platform is formed on top of the wheels, so that the vehicle always travels on four wheels. However, when pulling these four-wheeled vehicles up a step on a sidewalk or over a step or obstacle on the road, you must first lift the front wheels, place them on the step, and then pull up the vehicle (or Not only was this extremely inconvenient, but it also made it impossible to go up and down the stairs. In addition, in places where it is unavoidable to go up and down stairs to transport luggage, such as the stairs on a station platform, two-wheeled transport vehicles are used, which are convenient for going up and down stairs.
If the wheels do not rest on the top of the flat part of the stairs, for example, when the wheels are on the edge of the step, if your hand slips and you release the grip, the vehicle will fall, which is dangerous. Ta. In addition, a large amount of force is required to pull up the step, and furthermore,
When the radius of the wheel was smaller than the height at the step, it was sometimes impossible to pull up.

Furthermore, recently, a stair-climbing vehicle having a running section made of a crawler belt has been developed.
Crawler type has a continuous running surface (belt surface)
Because of this, it is possible to move up and down stably with little vertical movement, but the structure is complicated, the shape is large, the weight is large, and the manufacturing cost may also be high.
Moreover, there is a greater risk of falling when the hand is released than the two-wheeled ones mentioned above.

The purpose of this invention is to solve the above-mentioned problems by creating a lightweight and collapsible transport vehicle that has excellent stability and operability when operating on flat roads and staircases, and is free from the risk of falling during stairs. It also provides.

For this reason, the transport vehicle of this invention comprises legs, a slide bar slidably attached to the legs, a handle supported at the tip of the slide bar so as to bend freely, a foldable seat and wheels attached to the legs, and the slide bar is slidable in the axial direction of the legs and is fixed to the legs at a desired sliding length.
The wheel section is made up of two or more pairs of wheels, and in order to easily overcome steps, the straight line connecting the axles of each wheel is inclined upward, with the lowest wheel having the largest diameter and the wheel diameter gradually decreasing upward.

The vehicle for transporting luggage, etc. of the present invention will be explained below.

FIGS. 1 and 2 show an embodiment of a carrier according to the present invention. It has a slide bar 4 supported by a slide bar 4, a handle 6 which is bendably engaged with the tip of the slide 4, and a cargo seat 7 attached to the front of the leg part 2.

The wheel section 3 is composed of a right-angled frame 8 fixed to the leg section 2 and wheels 9, 10, 11 rotatably supported on the frame 8. The diameter of the frontmost wheel 9 of the wheel group is made the maximum, and the diameter decreases sequentially toward the rear, and each rotating shaft 9a,
A straight line connecting 10a and 11a is inclined upward toward the rear. In the embodiment, each rotating shaft 9a, 1
The angle θ formed by the straight line connecting 0a and 11a and the leg portion 2 is 25°.

For example, as shown in FIGS. 2A to 2C, the bending mechanism 5 has a connecting member 12 fixed to the tip of the slide bar 4, and a handle 6 rotatably supported on the connecting member 12 by a pin 13. Further, a projection 16 protruding from the side surface of the slide bar 4 is hooked to a hook 15 rotatably supported by a pin 14 on the side surface of the handle 6. When attaching the handle 6 to the slide bar 4, raise the handle as shown in Fig. 2A,
Hook 15 is hooked onto protrusion 16.

When folding the handle, rotate the hook 15 in the direction of the arrow to release the engagement with the protrusion 16, and then rotate the handle 6 around the pin 13 in the direction of the arrow to bring it into the state shown in Fig. 2B. do it.

Next, the slide bar 4 is fixed to the upper part of the leg part 2 and opened at the top and bottom as shown in FIG. Hook 18,
25.

The hook 18 is rotatably supported by a pin 18a provided on the leg 2 at the lower end of the guide pipe 17, and when the slide bar 4 is pulled upward, the hook 18 is attached to the lower end of the slide bar 4. It is configured to be latched onto a protrusion 19 protruding from. By hooking the hook 18 to the protrusion 19, the slide bar 4 is prevented from falling downward, and upward sliding is prevented by the protrusion 19 coming into contact with the lower end surface of the pipe 17. do.

On the other hand, the hook 25 is rotatably supported at the upper end of the guide pipe 17 by a pin 25a, and when the slide bar 4 is pulled down,
A protrusion 2 protruding from the side surface of the middle part of the slide bar 4
6 to prevent the slide bar 4 from sliding upward. When the slide bar 4 falls downward, the protrusion 26 is connected to the pipe 1.
This is prevented by coming into contact with the upper end surface of 7 and being locked.

The cargo seat 7 has one end rotatably supported by a pin 20 at the lower part of the leg portion 2, and its movable range is limited by a connecting rod 21. That is, the connecting rod 21 includes a grounding frame 21a and a connecting plate 2 rotatably connected to the upper end of the grounding frame 21a with a pin 22.
1b, and when the grounding frame 21a and the connecting plate 21b are made into a straight line, they are locked by a fixing piece 23 formed by bending the top end of the connecting plate 21b, so that they can maintain a straight connected state. It is said that (See FIG. 4) Furthermore, the upper end of the connecting plate 21b is rotatably supported on the leg portion 2, while the substantially central portion of the grounding frame 21a is rotatably supported on the side frame 7a of the seat portion 7. has been done. With this configuration, by lifting the central part of the connecting rod 11 upward, the grounding frame 21a and the connecting plate 2 can be removed.
1b is folded around the pin 22, and at the same time, the tip of the cargo seat 7 rotates upward, making it possible to fold it. (See Fig. 5) Reference numeral 24 indicates a connecting rod that is integrally formed with the handle 6. This connecting rod 24 protrudes toward the wheel portion 3 side of the vehicle body, and a through hole is formed in the center of the connecting rod 24. It has a connecting portion 24a that is rotatable. This connecting rod 24 is provided so that when the transport vehicle 1 is towed by a bicycle, for example, the connecting portion 24a is connected and fixed to the rear cargo bed of the bicycle so that the transport vehicle 1 can be towed, and may be omitted as appropriate. I can do it.

In the above configuration, when the transport vehicle of the present invention is used to move up and down stairs, the wheels 9, 10, and 11 are arranged at predetermined intervals and are inclined upward. The wheels 11 ride on the flat part of the upper stage, and then the wheels 10 abut against the side surfaces of the upper stage. Further, when it is pulled up, the wheels 10 ride on the flat part of the upper stage, and then the wheels 9 come into contact with the side surfaces of the upper stage. When this is pulled up again, the wheel 9 will be placed on the upper stage. In this way, each wheel can climb the stairs of a road, building, etc. one after another. Furthermore, when descending the stairs, each wheel can be descended one step at a time in the reverse order of the above-mentioned ascending steps. Incidentally, if the steps such as stairs are low, the wheels 9 and 10 alone can be used to move up and down sufficiently, so the wheels 11 will not operate in this case.

As is clear from the above explanation, the three wheels allow climbing over the steps one after another with great ease, and each wheel rides on the upper step one by one, so that one of the wheels is always on the top of the step. Since the vehicle is touching the ground by riding on the flat part of the ground, the load of the transport vehicle is always applied perpendicularly to the ground surface. Therefore, even if the vehicle stops in the middle of the stairs, the vehicle will not fall down the stairs, and the vehicle can be stopped at that position simply by lightly grasping the handle, so it is safe. Furthermore, it goes without saying that when descending from the stairs, you can safely descend step by step, just as you do when climbing up.

Note that when traveling on a flat road, only the wheels 9 touch the ground, so it can be used in the same manner as a generally known two-wheeled vehicle.

Furthermore, when carrying the vehicle, it can be easily made compact by fixing the slide bar 4 at the solid line position shown in Figure 1, bending the handle 6 and seat 7 in the direction of the arrows, and folding them into the state shown in Figure 5. can do.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the wheel portion does not necessarily have to be three pairs of wheels, but may be two or more pairs of wheels.
Other modifications and changes are possible without changing the gist of the invention.

As described above in detail, the foldable transport vehicle of the present invention is configured such that the rotating axes of each wheel are located approximately in a straight line, and each wheel has a diameter that becomes smaller as it goes toward the rear, and is located upward. did. Therefore, it is not only easy to get over steps and go up and down stairs, but also when going up and down stairs, one of the wheels is always in contact with the flat surface.
Since the load on the vehicle body is applied vertically, it can be stopped in a stable state, so there is no danger of it falling. It is also extremely easy to fold.
It has a simple structure and can be made lightweight, making it extremely convenient to transport and handle. Furthermore, since the structure is simple and lightweight, it has great effects such as being able to be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 A and B are side and front views of the carrier of the present invention, Fig. 2 A, B and C are explanatory diagrams of the structure of the bending mechanism, and Fig. 3 A and B are the structure of the connecting part of the slide bar. Figure 4 is an explanatory diagram of the bent portion of the connecting rod, Figure 5 is an explanatory diagram of the vehicle body in a folded state, and Figures 6 A and B are explanatory diagrams of the ascending and descending states of the wheel part when going up and down stairs. be. 1... Transport vehicle, 2... Legs, 3... Wheels, 4
...Slide bar, 5...Bending mechanism, 6...Handle, 7...Cargo seat, 8...Frame, 9,10,
11... Wheel, 1... Connecting member, 13, 14...
Pin, 15, 18, 25... Hook, 19... Locking protrusion, 20... Pin, 21... Link, 22...
Pin, 23...fixing piece, 24...connecting rod.

Claims (1)

[Scope of utility model registration request] Consisting of a leg part, a slide bar slidably attached to the leg part, a handle supported in a foldable manner at the tip of the slide bar, a foldable cargo seat attached to the leg part, and a wheel part, The slide bar is slidable in the axial direction of the leg and is fixed to the leg at a desired sliding length, and the wheel section is made up of two or more wheels, and the wheel section is configured to move upward along a straight line connecting the axles of each wheel. A foldable transport vehicle that is tilted and has a wheel at the lowest end having a maximum diameter, and a wheel diameter that gradually decreases as it goes upward.