JP2023005808A - Conveyance vehicle - Google Patents

Abstract

To provide a conveyance vehicle capable of unloading cargoes with a simple mechanism.SOLUTION: A conveyance vehicle 10 has: a body part 12 configured to be capable of autonomous travel and having an upper surface 12A inclined with respect to a horizontal direction; a rotary shaft 14 erected on the upper surface 12A; and a loading platform 16 supported by the body part 12 and rotatably attached to the rotary shaft 14 and having a lower surface 16A inclined along the upper surface 12A of the body part 12. An upper surface 16B of the loading platform 16 is horizontal at an initial position and is configured to incline as the loading platform 16 rotates.SELECTED DRAWING: Figure 1

Description

The present invention relates to transport vehicles.

Patent Literature 1 discloses a carriage capable of autonomous travel. Specifically, the carriage disclosed in Patent Document 1 has a structure in which a workpiece placement section is provided above an autonomous traveling section, and includes an elevator, a toggle arm, a slider, and the like.

JP 2019-38505 A

However, the carriage described in Patent Literature 1 uses a complicated mechanism for unloading, which increases the weight and leaves room for improvement.

An object of the present invention is to provide a transport vehicle capable of unloading with a simple mechanism.

A carrier vehicle according to claim 1 is configured to be able to travel autonomously, and is supported by a body portion having an upper surface inclined with respect to a horizontal direction, a rotating shaft erected on the upper surface, and the body portion, and a cargo bed rotatably attached to the rotating shaft and having a lower surface inclined along the upper surface of the main body, wherein the upper surface of the cargo bed is horizontal at an initial position; It is configured to tilt as it rotates.

The transport vehicle according to claim 1 is provided with a main body configured to be able to run smoothly, and the upper surface of the main body is inclined with respect to the horizontal direction. A rotating shaft is erected on the upper surface of the main body, and a loading platform is rotatably attached to the rotating shaft.

Here, the loading platform is supported by the main body, and the top surface of the loading platform is horizontal at the initial position and is configured to incline as the loading platform rotates. As a result, the cargo can be unloaded by its own weight simply by loading the cargo on the loading platform at the initial position, conveying it to the destination, and rotating the loading platform when the cargo arrives at the destination.

In addition, the loading platform may be rotatably attached to the rotating shaft at a central portion in the front-rear direction.

Further, the loading platform may be rotatably attached to the rotating shaft at a position offset forward or rearward from the central portion in the front-rear direction.

Furthermore, the rotating shaft may be movable in the front-rear direction with respect to the main body.

Furthermore, a fall prevention wall may be erected on the upper surface of the loading platform.

Moreover, a plurality of rollers may be arranged along one direction on the upper surface of the loading platform.

Furthermore, the loading platform may be circular in plan view.

According to the carrier vehicle according to the present invention, it is possible to unload cargo with a simple mechanism.

It is the schematic side view which looked at the conveyance vehicle which concerns on 1st Embodiment from the side. FIG. 2 is a schematic side view showing the transport vehicle after rotating the loading platform from the state of FIG. 1; FIG. 4 is a diagram for explaining the rotation of the bed in the first embodiment, (A) shows the state of the initial position, (B) shows the state between the initial position and the unloading position, (C) shows the unloading position. It is the schematic side view which looked at the conveyance vehicle which concerns on 2nd Embodiment from the side. FIG. 5 is a schematic side view showing the transport vehicle after rotating the loading platform from the state of FIG. 4; FIG. 11 is a schematic plan view of a carrier vehicle according to a third embodiment; FIG. 11 is a partially cutaway schematic side view of a transport vehicle according to a third embodiment, viewed from the side; FIG. 11 is a schematic plan view of a carrier vehicle according to a fourth embodiment;

<First embodiment>
A transport vehicle 10 according to the first embodiment will be described below with reference to the drawings. An arrow FR, an arrow UP, and an arrow RH appropriately shown in each figure respectively indicate the advancing direction (forward side) of the transport vehicle 10, the upper side of the transport vehicle 10, and the right side in the width direction of the transport vehicle.

As shown in FIG. 1, the carrier vehicle 10 of this embodiment mainly includes a main body 12, a rotating shaft 14, and a loading platform 16. As shown in FIG.

The body portion 12 includes front wheels 18 and rear wheels 20 . A pair of front wheels 18 are provided on the left and right sides, and are rotatably attached to front brackets 19 extending downward from the lower surface of the main body 12 . Note that FIG. 1 shows only the right front wheel 18 .

A pair of rear wheels 20 are provided on the left and right sides, and are rotatably attached to rear brackets 21 extending downward from the lower surface of the body portion 12 . Note that FIG. 1 shows only the right rear wheel 20 .

Here, the front wheels 18 and the rear wheels 20 are provided with motors (not shown), and the front wheels 18 and the rear wheels 20 are configured to rotate by the driving force of the motors. That is, the transport vehicle 10 of this embodiment has an in-wheel motor structure.

A battery (not shown) is provided inside the main body 12, and electric power stored in the battery is supplied to the motor to drive the front wheels 18 and the rear wheels 20 independently. That is, the transport vehicle 10 of this embodiment is a kind of BEV (Battery Electric Vehicle).

Furthermore, an ECU (Electrical Control Unit) 22 as a control section is provided inside the body section 12 . The ECU 22 supplies electric power from the battery to the motor, controls the front wheels 18 and the rear wheels 20, and the like.

The ECU 22 is also electrically connected to sensors (not shown) provided in the main body 12, and causes the main body 12 to autonomously travel based on signals from the sensors. As sensors, an optical camera, radar, LIDAR (Light Detection and Ranging), etc. are used in combination.

Here, the upper surface 12A of the body portion 12 is inclined with respect to the horizontal direction. Specifically, the upper surface 12A is inclined so as to be gradually positioned downward from the rear end of the body portion 12 toward the front end. Therefore, the body portion 12 has a lower vertical height at the front end than at the rear end.

A rotary shaft 14 is erected on the upper surface 12A of the body portion 12 . The rotating shaft 14 is provided in the front-rear direction central portion of the body portion 12 and extends in a direction perpendicular to the upper surface 12A of the body portion 12 . That is, the axis of the rotating shaft 14 and the upper surface 12A are substantially perpendicular to each other when viewed from the side of the vehicle.

The rotary shaft 14 is rotatably attached to the main body 12 and is rotated by driving a motor (not shown) provided on the main body 12 . Driving of the motor is controlled by the ECU 22 .

A loading platform 16 is rotatably attached to the rotary shaft 14 . The loading platform 16 is supported on the upper surface 12A of the main body 12 via bearings 24. As shown in FIG. Therefore, the loading platform 16 is rotatable around the rotating shaft 14 while being supported by the main body 12 .

Further, the loading platform 16 is rotatably attached to the rotating shaft 14 at the central portion in the front-rear direction, and the lower surface 16A of the loading platform 16 is inclined along the upper surface 12A of the main body 12 at the initial position. FIG. 1 shows a state in which the loading platform 16 is at the initial position, and in this state, the lower surface 16A of the loading platform 16 is inclined so as to be positioned gradually downward from the rear end to the front end. In this embodiment, as an example, the angle of inclination of the lower surface 16A of the loading platform 16 and the angle of inclination of the upper surface 12A of the body portion 12 are substantially the same.

On the other hand, the top surface 16B of the loading platform 16 is horizontal at the initial position shown in FIG. 1, and the load G is placed on the top surface 16B. Here, the upper surface 16B of the loading platform 16 is configured to incline as the loading platform 16 rotates.

As shown in FIGS. 3A to 3C, the loading platform 16 is horizontally rotatable with respect to the main body 12 from the initial position to the unloading position rotated 180 degrees. Here, the body portion 12 and the loading platform 16 are formed in a substantially rectangular shape with the front-rear direction as the longitudinal direction in a plan view, and as shown in FIG. is placed in front of the

As shown in FIG. 3B, the loading platform 16 rotates clockwise in a plan view around the rotating shaft 14, and in the state of moving to the unloading position, the loading platform 16 moves in the lateral direction of the main body 12. It will be in a state of protruding to

As shown in FIG. 3C, when the loading platform 16 has moved to the unloading position, the load G is rotated 180 degrees with respect to FIG. located on the side.

As shown in FIG. 2, when the loading platform 16 is moved to the unloading position, the loading platform 16 rotates around the rotation shaft 14, so that the upper surface 16B of the loading platform 16 is inclined. That is, the loading platform 16 rotates while maintaining the inclination angle of the lower surface 16A substantially equal to the inclination angle of the upper surface 12A of the main body 12, so that the upper surface 16B is inclined. At the unloading position, the upper surface 16B of the loading platform 16 is the most inclined with respect to the horizontal direction, and the load G slides down from the loading platform 16 under its own weight. Here, in FIG. 2 , a predetermined cargo collection box 100 is arranged in front of the transport vehicle 10 , and the cargo G slides down from the loading platform 16 and is accommodated in the cargo collection box 100 .

(Action)
Next, the operation of this embodiment will be described.

The carrier vehicle 10 according to the present embodiment includes a main body portion 12 configured to be able to run smoothly, and the main body portion 12 supports a loading platform 16 . The upper surface 16B of the loading platform 16 is horizontal at the initial position and is configured to incline as the loading platform 16 rotates. As a result, the transport vehicle 10 with the cargo G loaded on the loading platform 16 at the initial position autonomously travels to the destination under the control of the ECU 22 . When the cargo G arrives at the destination, it can be unloaded by its own weight only by rotating the loading platform 16 under the control of the ECU 22. - 特許庁

<Second embodiment>
Next, the transport vehicle 30 according to the second embodiment will be described. In addition, the same code|symbol is attached|subjected about the structure similar to 1st Embodiment, and description is abbreviate|omitted suitably.

As shown in FIG. 4, the transport vehicle 30 of this embodiment is the same as that of the first embodiment except for the rotating shaft 32. As shown in FIG.

The rotating shaft 32 is provided upright on the upper surface 12A of the body portion 12, and the rotating shaft 32 of the present embodiment is provided at a position offset forward from the central portion of the body portion 12 in the front-rear direction. Further, the rotating shaft 32 extends in a direction perpendicular to the upper surface 12A of the body portion 12. As shown in FIG. That is, the axis of the rotating shaft 32 and the upper surface 12A are substantially perpendicular to each other when viewed from the side of the vehicle.

The rotary shaft 32 is rotatably attached to the main body 12 and is rotated by driving a motor (not shown) provided on the main body 12 .

At the initial position, the loading platform 16 is rotatably attached to the rotating shaft 14 at the front side of the central portion in the front-rear direction. Therefore, as shown in FIG. 5, the loading platform 16 protrudes forward from the main body 12 at the unloading position where the loading platform 16 is rotated 180 degrees in the horizontal direction.

(action)
Next, the operation of this embodiment will be described.

In the carrier vehicle 30 of the present embodiment, the load G can be unloaded with the loading platform 16 protruding from the main body 12 . As a result, the main body 12 can be stopped in front of the collection box 102 and unloaded, and interference of the main body 12 with the collection box 102 can be suppressed.

Also, at the unloading position, the front end of the loading platform 16 (the rear end of the loading platform 16 at the initial position) is positioned lower than in the first embodiment. This allows unloading to the collection box 102 that is lower in height than in the first embodiment. Other actions are the same as in the first embodiment.

<Third Embodiment>
Next, a transport vehicle 40 according to a third embodiment will be described. In addition, the same code|symbol is attached|subjected about the structure similar to 1st Embodiment, and description is abbreviate|omitted suitably.

As shown in FIGS. 6 and 7, the transport vehicle 40 of this embodiment differs from that of the first embodiment in that the configuration of the loading platform 42 is different.

Specifically, the loading platform 42 of this embodiment is supported by the upper surface 12A of the main body 12 via the bearings 24 . Moreover, the loading platform 42 is rotatably attached to the rotating shaft 32 .

Here, the lower surface 42A of the loading platform 42 is inclined along the upper surface 12A of the body portion 12 at the initial position. FIG. 7 shows a state in which the loading platform 42 is at the initial position, and in this state, the lower surface 42A of the loading platform 42 is inclined downward from the rear end toward the front end.

On the other hand, the top surface 42B of the loading platform 42 is horizontal at the initial position shown in FIG. 7, and the load G is placed on the top surface 42B. Further, the upper surface 42B of the loading platform 42 is configured to incline as the loading platform 42 rotates.

A fall prevention wall 44 is erected on the upper surface 42B of the loading platform 42 . As shown in FIG. 6, the fall prevention wall 44 includes a front side wall portion 44A standing along the periphery of the front end portion of the loading platform 42 in the initial position, and a front wall portion 44A extending from both left and right ends of the front side wall portion 44A to the periphery of the loading platform 42. As shown in FIG. and left and right wall portions 44B extending rearward along the . Therefore, the load G is surrounded on three sides by the fall prevention walls 44 .

A plurality of rollers 46 are arranged on the upper surface 42B of the loading platform 42 . The rollers 46 are arranged in the longitudinal direction of the loading platform 42 at the initial position, and both ends of each roller 46 are rotatably supported by the left and right walls 44B. It also has a lock mechanism (not shown) to prevent it from rotating during transportation.

(Action)
Next, the operation of this embodiment will be described.

In the transport vehicle 40 of the present embodiment, even if centrifugal force acts on the cargo G when rotating the cargo bed 42, the fall prevention wall 44 can prevent the cargo G from falling from the cargo bed 42. .

In addition, since the transport vehicle 40 of the present embodiment is provided with a plurality of rollers 46 arranged in the front-rear direction, the rollers 46 rotate to reliably unload the cargo G when the lock mechanism is released during unloading. can do. Other actions are the same as in the first embodiment.

<Fourth Embodiment>
Next, a transport vehicle 50 according to a fourth embodiment will be described. In addition, the same code|symbol is attached|subjected about the structure similar to 1st Embodiment, and description is abbreviate|omitted suitably.

As shown in FIGS. 8A to 8C, the carrier vehicle 50 of the present embodiment differs from the first embodiment in that the loading platform 52 is formed substantially circular in plan view.

Specifically, the loading platform 52 of the present embodiment is provided in the central portion of the main body 12 in the front-rear direction, and is rotatably attached to the rotating shaft 14 . Although not shown, the bottom surface of the loading platform 52 has the same configuration as that of the first embodiment shown in FIG. That is, the lower surface of the loading platform 52 is inclined at the same angle as the upper surface 12A of the main body 12, and the upper surface of the loading platform 52 is horizontal at the initial position and is inclined as the loading platform 52 rotates. It is configured.

Here, four partition plates 54 are provided on the upper surface of the loading platform 52 at equal intervals in the circumferential direction, and each partition plate 54 extends from the periphery to the center of the loading platform 52 in plan view. . For this reason, the upper surface of the loading platform 52 is partitioned into four areas 52A, 52B, 52C and 52D by four partition plates 54. As shown in FIG.

FIG. 8(A) shows a state in which the loading platform 52 is in the initial position. In this state, the upper surface of the loading platform 52 is horizontal. Also, the region 52A is positioned forward, and the region 52C is positioned rearward. Further, the area 52B is located on the left and the area 52D is located on the right.

Here, the load GA is placed in the area 52A, the load GB is placed in the area 52B, and the load GD is placed in the area 52D. That is, in this embodiment, as an example, three packages are placed on the loading platform 52 .

In addition, each loading platform 52 is provided with a stopper (not shown), which prevents each luggage from slipping down. The stopper is controlled by the ECU 22 . Then, when the ECU 22 releases the stopper while the cargo is under its own weight, the cargo is unloaded by its own weight.

(Action)
Next, the operation of this embodiment will be described.

When the loading platform 52 is rotated 90 degrees clockwise from the initial position shown in FIG. 8A, the region 52B moves forward. Further, the upper surface of the loading platform 52 is inclined as the loading platform 52 rotates. Therefore, in the state of FIG. 8B, the upper surface of the region 52B is inclined downward toward the front. By releasing the stopper in the region 52B in this state, the load GB is unloaded from the loading platform 52 by its own weight.

Next, when the loading platform 52 is further rotated clockwise by 90 degrees in plan view from the state of FIG. 8(B), the region 52C moves forward. When the loading platform 52 is subsequently rotated clockwise by 90 degrees in plan view, the region 52D moves forward as shown in FIG. 8(C). By releasing the stopper of the region 52D in this state, the cargo GD is unloaded from the loading platform 52 by its own weight.

As described above, the transport vehicle 50 of the present embodiment is capable of transporting a plurality of packages and can unload any package. Other actions are the same as in the first embodiment.

Although the transport vehicles 10, 30, 40, and 50 according to the first to fourth embodiments have been described above, it is needless to say that they can be implemented in various ways without departing from the gist of the present invention. In the first embodiment described above, as shown in FIG. 1, the rotary shaft 14 is provided at the central portion of the main body 12 in the front-rear direction, but the present invention is not limited to this. For example, a moving mechanism may be provided to move the rotating shaft in the front-rear direction with respect to the main body. In this case, the state of the second embodiment shown in FIG. 4 can be obtained by moving the rotating shaft forward from the state of FIG. 1 by the moving mechanism.

In the first to third embodiments described above, a substantially rectangular cargo bed in plan view was employed, and in the fourth embodiment, a substantially circular cargo bed in plan view was employed, but the present invention is not limited to this. . That is, the cargo bed may be formed in other shapes, for example, a substantially triangular cargo bed in plan view may be employed.

Furthermore, the shape of the main body 12 and the number of wheels are not particularly limited, and various configurations can be adopted. For example, instead of wheels, a moving mechanism having spherical rollers may be used. In this case, movement in all directions can be easily performed.

Reference Signs List 10, 30, 40, 50 conveyance vehicle 12 main body 12A upper surface 14, 32 rotating shaft 16, 52 loading platform 16A lower surface 16B upper surface

Claims (1)

a main body configured to be able to travel autonomously and having an upper surface inclined with respect to the horizontal direction;
a rotating shaft erected on the upper surface;
a loading platform supported by the main body and rotatably attached to the rotating shaft, the lower surface of which is inclined along the upper surface of the main body;
has
A transport vehicle, wherein the upper surface of the loading platform is horizontal at an initial position and is configured to incline as the loading platform rotates.

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