JPH0318302Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to transport vehicles, and more specifically, it can be used in transport lines, sorting lines, etc. of automated warehouses, and in particular, even when the trolley is turned, the upper part of the trolley does not The present invention proposes a transport vehicle in which the orientation of the loading platform does not change.

[Prior art]

In conventional unmanned transport systems, due to constraints on travel routes, the transfer point of the transported object (hereinafter referred to as station) and the automatic guided vehicle often have a positional relationship as shown in FIG. 1. In FIG. 1, reference numeral 1 denotes a linear main road, and a branch road 2 is formed in the middle of the main road 1, and a station 3 is provided at the tip of the branch road 2. Reference numeral 4 denotes an automatic guided vehicle, and a roller conveyor 4a that can convey the object in a direction perpendicular to the traveling direction indicated by the white arrow is provided on the upper part of the automatic guided vehicle, and a conveyed object 5 is placed on the upper part of the roller conveyor 4a. be done. In order to transfer the transported object 5 currently placed on the automatic guided vehicle 4 to the station 3, the automatic guided vehicle 4 is moved straight from point A to point B.
When the automatic guided vehicle 4 turns to the right and enters the branched travel path 2 to move to point C, the transfer direction of the roller conveyor 4a of the automatic guided vehicle 4 becomes perpendicular to the direction of the station 3, and the conveyed vehicle Object 5 cannot be transferred to station 3. Therefore, it is necessary to turn the vehicle body 90 degrees just for transfer in front of station 3.

In order to solve this problem, by changing the direction of the running wheels of the automatic guided vehicle 4 to the right angle direction and providing a traversing function, when the automatic guided vehicle 4 moves from point A to point B, the running wheels If the direction is changed to a right angle direction so as to be parallel to the branch running path 2, and the automatic guided vehicle 4 is moved on the branch running road 2 in the direction of the station, the conveyance direction of the roller conveyor 4a of the automatic guided vehicle 4 will match the direction of the station 3. Therefore, it becomes possible to transfer the transported object 5 from the automatic guided vehicle 4 to the station 3. However, the direction of the wheels when traveling straight on the main road 1 is different from that on the branch road 2.
When moving horizontally, the control of each wheel becomes complicated because it is necessary to change the direction at right angles, and a direction control motor is required to change the direction of each traveling wheel. There were problems such as the structure becoming more complicated.

〔the purpose〕

The present invention has been made to solve the above-mentioned problem, and is provided with a rotating loading platform on the upper part of the truck, and when the truck turns, the loading platform is moved in the rotating direction of the truck by the rotational driving force of the traveling wheels. It is an object of the present invention to provide a new conveyance vehicle which can easily transfer objects to the station as described above by having a structure in which the conveyance vehicle rotates in the opposite direction.

〔composition〕

The conveyance vehicle according to the present invention includes a cart whose wheels are driven by a motor, a mounting frame that is rotatably provided on the trolley and on which an object to be transported is placed, and is interposed between the mounting platform and the motor, It is characterized by comprising a transmission means for turning the pedestal by an angle substantially equal to the turning angle of the cart in a direction opposite to the turning direction of the cart, and a clutch mechanism for intermittent transmission of power by the transmission means. shall be.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The transport vehicle according to the present invention will be explained in detail below with reference to drawings showing embodiments. 2 to 4 are a top view, a partially cutaway side view, and a partially cutaway front view of the carrier.

In FIGS. 2 to 4, 10 is a truck, and 11 is a loading table which is rotatably provided on the upper part of the truck 10 and on which an object to be transported (not shown) is placed. The trolley 10 has a disk-shaped base plate 10a, and axle support members 10b are attached to the left and right sides of the lower surface of the base plate 10a at positions symmetrical to the center, and a motor mount is mounted opposite to the axle support members 10b. member 10d,
Traveling wheels 10l and 10r are attached between the vehicle and the vehicle 10e. Caster mounting legs 10c, 10c are attached centrally symmetrically to the front and back of the lower surface of the base plate 10a, and rotatable casters 10m, 10m are attached to the lower ends of the caster mounting legs 10c, 10c.

The traveling wheels 10l, 10r have a base plate 10a.
Motor mounting members 10d and 10e attached to the bottom surface of
The output shafts 10f', 10g' of the drive motors 10f, 10g attached to the respective ones are connected and driven individually. Further, the output shaft 10g' is provided with a clutch mechanism consisting of a drive plate 10h and a driven plate 10i connected to and detached from the drive plate 10h. This drive board 10h is spline-fitted with the output shaft 10g' and can be slid in the axial direction.
It moves to the i side and meshes with the driven plate 10i. On the other hand, the driven plate 10i is loosely fitted to the output shaft 10g' at a predetermined position so as to be able to idle.
When it is set to 0h, it rotates in conjunction with the output shaft 10g'. Note that a groove for hanging a belt is formed in the driven plate 10i.

The loading table 11 is formed to have the same size and shape as the bed plate 10a, and is arranged concentrically on the bed plate 10a.
The support shaft 10 is installed vertically at the center of the base plate 10a.
It is supported by J and can rotate freely. Furthermore, rollers 11a are rotatably attached to the lower surface of the loading platform 11 at four equally spaced positions on the circumference and can roll on the upper surface of the platform 10a to support the loading platform 11. On the other hand, an electrically driven roller conveyor 11b is provided on the upper surface of the loading platform 11.

A hole of an appropriate size is formed in a portion of the base plate 10a of the truck 10 that faces the driven plate 10i of the clutch mechanism, and a roller support member 10x is provided upright on the upper surface of this hole to support the roller. A drive roller 10z made of rubber or the like having a strong frictional force is rotatably attached to the member 10x by a rotation shaft 10y. The outer peripheral surface of the drive roller 10z is in contact with the lower surface of the loading platform 11. The rotating shaft 1
0y is a driven pulley 1 with a groove for belt hanging.
0w is fixed. And this driven pulley 1
A belt 12 constituting a transmission mechanism is stretched across the 0W belt hanging groove and the belt hanging groove of the driven plate 10i through a hole in the base plate 10a, and the driven plate 10i rotates. Board 10
The driving roller 10z rotates in a direction opposite to the rotational direction of i to rotate the loading platform 11.

Note that the base plate 10a and the loading platform 11 are not limited to circular shapes.

Next, the conveyance operation by the conveyance vehicle A constructed as described above will be explained with reference to a travel path as shown in FIG. This carrier A has a pair of traveling wheels 10l, 1
By driving the drive motors 10g and 10f to rotate 0r at a constant speed, the casters 10m and 10m provided on the front and rear sides of the truck 10 and the running wheels 10
1 and 10r, it travels straight on the main traveling path 1 as shown in FIG. At this time, the roller conveyor 11
The transfer direction b is perpendicular to the traveling direction. When the vehicle reaches a position B branched from the main traveling path 1, the drive motor 10g of the traveling wheel 10r provided with the drive board 10i is reversed to reverse the direction of rotation of the traveling wheel 10r, thereby moving the bogie 10 to the right. Rotate around the place. As a result, the pair of running wheels 10l and 10r are connected to the branch running path 2.
It becomes possible to move straight toward the side and move to the station 3. By the way, when turning the trolley 10 to the right, the drive motor 10g is reversed and at the same time the clutch mechanism is operated, and the drive plate 10h is rotated.
and the driven plate 10i. Then, the driving roller 10z is rotationally driven via the belt 12 by the rotational driving force of the motor 10g, and the loading platform 11 is rotated to the left. That is, when the cart 10 is turned to the right, the loading platform 11 is turned to the left and the conveyance direction of the roller conveyor 11b is maintained in the direction before turning. and trolley 1
After turning 0, the drive plate 10h is separated from the driven plate 10i again and the traveling wheels 10l, 10r are driven in the original rotational direction, so that the trolley 10 can be made to travel straight to the station 3 as it is. The transfer direction of the roller conveyor 11b is toward the station 3, so by driving the roller conveyor 11b, the objects (not shown) placed on the roller conveyor 11b are transferred in the direction of the arrow without changing the direction of the vehicle body. It can then be transferred to Station 3. Then, after transferring the object to be transported, move the station 3 by reversing the procedure described above.
It is possible to move away from the vehicle and return to the main travel path 1 at a predetermined time, allowing the vehicle to travel on the main travel path as before.

In this embodiment, the loading platform 11 is rotationally driven by the driving roller 10z, but this can also be achieved by using the driving roller 10z as a gear and providing circular teeth on the lower surface of the loading platform 11 that mesh with the gear. Of course you can.

As described in detail above, according to the present invention, when the trolley 10 turns, the rotational force of the motor 10g that rotates one traveling wheel 10r is transmitted to the loading platform 11 to rotate the loading platform 11. Since the direction of the loading platform 11 does not change even when the loading platform 11 rotates, the intended purpose can be achieved with a simple structure.

Further, unlike the conventional vehicle, there is no need for a drive motor for changing the direction of the traveling wheels, and the vehicle can be assembled at low cost, and the truck can be weighed. Furthermore, unlike in the past, the direction of the plurality of running wheels is not individually changed to enable the trolley 10 to move sideways, but only one pair of running wheels is driven, so the distance between the running wheels remains unchanged. The running performance can be made stable, and the running wheels 10l, 10
Since the mutual relationship between r does not change at all, there is no need to adjust or control their orientation, and excellent effects such as improved reliability can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing the traveling route of an automated guided vehicle in an automated guided vehicle system, and FIGS. 2 to 4 are a top view, a partially cutaway side view, and a partially cutaway side view of the guided vehicle according to the present invention. It is a front view of fracture. 1... Main running route, 2... Branch running route, 3... Station, 10... Trolley, 10l, 10r...
Traveling wheel, 10h... Drive board, 10i... Driven board, 10z... Drive roller, 11... Loading platform, 1
1b...Roller conveyor, 12...Belt.

Claims (1)

[Scope of utility model registration request] A trolley whose wheels are driven by a motor, a mounting frame that is rotatably provided on the trolley and on which an object to be transported is placed, and a mounting frame that is interposed between the mounting frame and the motor and that is opposite to the rotating direction of the trolley. A conveyance vehicle characterized by comprising: a transmission means for rotating the pedestal by an angle substantially equal to a rotation angle of the trolley in a direction; and a clutch mechanism for intermittent transmission of power by the transmission means.