JPH10324249A - Carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrier capable of easily moving on the stairs and steps. SOLUTION: A plurality of rollers are arrayed in a row with an axial angle θ. At this time, the rollers adjacent to each other are arrayed such that both end parts thereof are stacked in the vertical directions of roller arraying columns 6 and 7. Further, another plurality of rollers are arrayed in a row in a direction opposite that of the axial angle θ. These two roller arraying columns 6 and 7 are maid a pair and attached to the bottom part of a carrier. When the carrier is moved on the stairs or the steps, the plurality of rollers are moved on the corners of the steps sequentially and thus smooth stepping- over movement is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport vehicle that moves on stairs and steps.

[0002]

2. Description of the Related Art In conventional transport vehicles, it is very difficult to move on stairs and steps. Wheels on stairs,
In order to make it difficult to get over the steps, the vehicle was stopped in front of the stairs and steps, and the luggage was transshipped or the vehicles were forcibly lifted and moved. In addition, as a transportable vehicle capable of moving stairs and steps, there are those in which a plurality of wheels are attached to both ends of an axle, those in which an axle portion is supported by a U-shaped leaf spring, and those in which a caterpillar is driven by power. However, there is a lack of convenience such as a large backlash during movement, lack of smoothness, and a heavy and expensive driving device.

[0003]

SUMMARY OF THE INVENTION The present invention solves the problems of the prior art, such as rattling during moving, heavy and expensive, and smooth, lightweight, inexpensive and convenient movement of stairs and steps. It is intended to provide a transport vehicle with high performance.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a plurality of rollers are arranged in a line at a certain axis angle θ. At this time, the rollers are arranged such that both ends of the adjacent rollers overlap in the direction perpendicular to the row. Further, another plurality of rollers are arranged in a line in a direction opposite to the axis angle θ. These two rows of rollers are attached to the bottom of the vehicle as a pair.

[0005]

[Function] When the transport vehicle moves over stairs and steps,
First, the top roller of the multiple rollers is in contact with the corners of the steps and steps. When the truck is moved as it is, the top roller passes through the corner while rotating. At this time, since the roller has the axis angle θ, the contact portion with the corner rotates while moving in the axial direction of the roller. When the transport vehicle continues to move further, the corner comes into contact with the tip of the second roller and, like the first roller, rotates while shifting the contact portion with the corner in the axial direction of the roller, and passes through the corner. At this time, since the adjacent rollers are arranged so that both ends thereof overlap in the perpendicular direction of the roller side-by-side row, before the rear end of the first first roller comes out of contact with the corners, The tip of the second roller begins to contact the corner.
Thereby, the movement of the corner from the first roller to the second roller can be performed smoothly. By repeating this in sequence, the transport vehicle can move over the stairs and steps smoothly. In addition, since the rollers are arranged side by side with an axis angle θ, when the contact portion with the corner moves in the axial direction of the roller, a thrust force is generated in the lateral direction, but a plurality of rollers are opposite to each other in a pair of rows. Since they are juxtaposed with the axial angle of the direction, the thrust forces cancel each other out,
Helps to move stairs and steps.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a transport vehicle according to the present invention will be described below with reference to the drawings. 1 is an overall perspective view according to the present invention, FIG. 2 is a front view of a transport vehicle, FIG. 3 is a side view of the transport vehicle, FIG. 4 is an enlarged view of a roller mounting portion, and FIG. , FIG. 6 shows a state in which the carrier is moving on the stairs, and FIG. 7 shows a side view in a state in which the carrier is folded. The carrier 1 includes a frame 2, a roller mounting plate 3, wheels 4, and a stopper 5. The roller mounting plate 3 has a pair of rollers
And 7 are attached. As shown in FIG. 4, a plurality of rollers 8a, 8b, 8c,... At this time, the adjacent roller is disposed such that both ends of the roller overlap in the perpendicular direction of the row of rollers. This overlapping dimension is S.
Similarly, a plurality of rollers 9 are also provided in the roller side-by-side row 7.
, a, 9b, 9c,... are arranged side by side in a direction opposite to the axis angle θ, and are similarly arranged so as to have an overlapping dimension S.

When the luggage is loaded on the transport vehicle 1 and the stairs are moved as shown in FIG. 6, corners 13 of the stairs are first formed by the rollers 8a and 9a.
Contact the tip of a. Assuming that the contact point between the roller 8a and the corner 13 is 10a, as the transport vehicle 1 moves up the stairs, the contact points move from 10a to 10b and 10c. At this time, before the contact point reaches 10c, it comes into contact with the adjacent roller 8b at 11a. Contact point 11a
Similarly, the vehicle moves to 11b and 11c, and this is sequentially repeated, so that the carrier can move smoothly on the stairs.

The contact points with the corners 13 are 10a, 10b, 1
0c, a thrust force acts in the transverse direction with respect to the moving direction of the transport vehicle. However, the rollers 9a, 9b,
9c are arranged side by side, so that the thrust forces cancel each other out, which helps the transportation vehicle to move more smoothly.

The angle of the roller mounting plate 3 can be appropriately adjusted through the stopper 5 and the adjusting hole 12, and when not in use, it can be folded as shown in FIG.

As described above, according to the present invention, it is possible to provide a lightweight, inexpensive, and highly convenient transportation vehicle in which stairs and steps are smoothly moved. In addition, the present invention can be widely applied to not only luggage carriers but also travel bags, strollers and the like.

[0011]

[Effects of the Invention] It has been a long time since the development and efficiency of logistics are called out.
It is still in a state that cannot be resolved. The present invention is a great help in solving these problems.

[Brief description of the drawings]

FIG. 1 is an overall perspective view according to the present invention.

FIG. 2 is a front view of the transport vehicle according to the present invention.

FIG. 3 is a side view of the transport vehicle according to the present invention.

FIG. 4 is an enlarged view of a roller mounting portion of the transport vehicle according to the present invention.

FIG. 5 is a sectional view taken along the line AA in FIG. 4;

FIG. 6 is a diagram illustrating a state in which the carrier according to the present invention is moving on stairs.

FIG. 7 is a side view of the carrier according to the present invention in a folded state.

[Description of Signs] 1 Transport vehicle 2 Frame 3 Roller mounting plate 4 Wheel 5 Stopper 6 Roller side-by-side row 7 Roller side-by-side row 8a Roller 8b Roller 8c Roller 9a Roller 9b Roller 9c Roller 10a Contact point 10b Contact point 10c Contact point 11a Contact point 11b Contact point 11c Contact point 12 Adjustment hole 13 Corner of stairs

Claims (2)

[Claims] 1. A plurality of rollers are arranged in a line at a certain axis angle θ. At this time, the rollers are arranged so that both ends of the adjacent rollers overlap in the perpendicular direction of the row of rollers.
Further, another plurality of rollers are arranged in a line in a direction opposite to the axis angle θ. A transport vehicle characterized in that these two roller rows are mounted as a pair. 2. The transportation vehicle according to claim 1, wherein said shaft angle θ is set to 15 degrees to 60 degrees.