JPS593363B2 - Goods transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide an article transfer device that moves a belt conveyor forward and backward to facilitate loading and unloading of articles.

For example, a belt conveyor may be attached to the loading platform of an unmanned transport vehicle (hereinafter referred to as a transport vehicle) in order to efficiently transport goods.

However, a slight distance is provided between the loading platform and the loading/unloading platform, and the arrangement is such as to prevent a collision between the carrier and the loading/unloading platform.

This device may not be able to load and unload items smoothly, and there is a need for a movable device that eliminates the gap.

The present invention was devised in view of the above-mentioned needs, and embodiments will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a transport vehicle, and its body 2 is supported by three wheels 3.

On the loading platform 4 of the transport vehicle 1, there is an eye-shaped machine frame 5 of an article transfer device.
Three pairs of support rollers 6.6 are disposed facing each other inside.

This support roller 6.6 supports the conveyor frame 7,
It is configured to be able to move forward and backward in a direction perpendicular to the traveling direction of the transport vehicle 1.

A drive shaft 9 for rotating the belt 8 and a driven shaft 10 are rotatably attached to the conveyor frame 7.

A sprocket 11 is attached to the end of the drive shaft 9.

Further, the conveyor frame 1 is provided with the sprocket 11.
A first guide roller 13 is suspended on the same vertical plane via a fixture 12, and a stopper 14 is attached to the forward end of the conveyor frame 7 so as to protrude slightly from the conveyor frame 7.

The retraction limit of the conveyor frame 7 is determined by a retraction limit stopper (not shown) attached to the machine frame 5, and is configured to be detected by a first limit switch LS1.

On the other hand, a second guide roller 16 is attached below the machine frame 5 via a fixture 15, and a deceleration motor 1T
A drive sprocket 18 is attached to its output shaft, and an endless chain 19 is wound between it and the sprocket 11, and the winding constitutes a transmission mechanism, and the deceleration motor 1
7 is transmitted to the drive shaft 9 of the belt 8.

The endless chain 19 is bent by the first and second guide rollers 13 and 16 in the backward direction of the conveyor frame 7 so that the conveyor frame 7 has a sufficient distance to move.

The deceleration motor 17 is a motor capable of forward and reverse rotation,
This control is performed by a control circuit shown in FIG.

This control circuit controls the switch MSF or M so that the deceleration motor 17 is rotated forward or reverse by the start switch ST and the loading/unloading operation changeover switch SS.
Activate SR.

The second limit switch LS2 detects that the conveyor frame 7 has stopped at the forward position, and the third limit switch L
S3 is arranged to detect the completion of loading of articles.

B1 is a brake for the conveyor frame, and B2 is a brake for the belt, each of which is attached to a predetermined position of the article transfer device.

In the above article transfer device, when the carrier 1 approaches the loading/unloading platform 20 and stops as shown in FIG. 4, the start switch ST is turned on.

When the changeover switch is set to the article loading side, the deceleration motor 17 rotates forward (clockwise).

At this time, the brake B1 of the conveyor frame 7 is released, and the brake B2 of the belt 8 is activated.

When the endless chain 19 is pulled by the rotation, the conveyor frame 7 is pushed out by the tension side and starts to move forward.

The stopper 14 of the conveyor frame 7 is connected to the loading and unloading table 20
When it comes into contact with the conveyor frame 7, the second limit switch LS2 detects this, applies the brake B1 to the conveyor frame 7, and releases the brake B2 of the belt 8.

At the same time, the deceleration motor 17 is reversed, the belt 8 is rotated, and articles can be easily and smoothly loaded onto the belt 8 from the loading/unloading table 20.

When loading is completed, the third limit switch LS3 is turned off, releasing the brake B1 of the conveyor frame 7 and applying the brake B2 to the belt 8.

The deceleration motor 17 continues to rotate in the reverse direction, the second guide roller 16 is fixed to the machine frame 5, and the endless chain 19 is pulled counterclockwise, so that the first guide roller 1
3 is attracted and causes the conveyor frame 7 to retreat.

When the conveyor frame 7 reaches its backward limit, the first limit switch LS1 is activated to stop the deceleration motor 17.

When the b contact of the changeover switch SS is turned on and set to the article unloading side, the deceleration motor 17 rotates forward at the same time as the start switch ST is turned on, and the conveyor frame 7 moves forward in the same manner as described above.

The stopper 14 of the conveyor frame 7 is connected to the loading and unloading table 20
, the second limit switch LS2 is activated to apply the brake B1 to the conveyor frame T and release the brake B2 of the belt 8.

At this time, since the deceleration motor 17 continues normal rotation, the belt 8
rotates, allowing articles to be smoothly unloaded onto the loading/unloading table 20.

When the work of unloading the article is completed, the fourth limit switch LS4 is turned on, the b contact is turned off, and the deceleration motor 1 is turned off.
7 is reversed, the brake B1 of the conveyor frame 7 is released, and the brake B2 is applied to the belt 8.

In the conveyor frame 7, the second guide roller 16 is stationary and the endless chain 19 is pulled counterclockwise, so the first guide roller 13 is attracted and the conveyor frame 7 is moved backward.

When the conveyor frame 7 reaches its backward limit, the deceleration motor is stopped and the work is completed.

Incidentally, when only the work of unloading articles is performed, the same effect can be obtained even without the conveyor frame brake B1 and the belt brake B2 described above.

Furthermore, in this embodiment, the explanation is limited to the transmission mechanism with the endless chain, but it does not need to be an endless chain, it may be a bowl body segment, or it may be a resin timing belt or a flat belt. Of course it's a good thing.

As explained above, the present invention uses a transmission mechanism to enable the conveyor frame to move forward and backward.
Even if there is an arbitrary interval between the belt conveyor and the loading/unloading table, the loading/unloading work of articles can be carried out smoothly and reliably, and there is an advantage that an inexpensive device with a simple structure can be provided.

[Brief explanation of drawings]

Figure 1 is a cutaway front view of the main parts of the present invention, and Figure 2 is A of Figure 1.
3 is a partially cutaway plan view of FIG. 1, FIG. 4 is an explanatory diagram showing the operation of the present invention, and FIG. 5 is a control circuit according to the present invention. 1 is a transport vehicle, 2 is a vehicle body, 3 is a wheel, 4 is a loading platform, 5 is a machine frame, 6 is a support roller, 7 is a conveyor frame, 8 is a belt, 9 is a drive shaft, 10 is a driven shaft, ' 11 is a sprocket , 12 is a fixture, 13 is a first guide roller, 14 is a stopper, 15 is a fixture, 16 is a second guide roller, 17 is a reduction motor, 18 is a drive sprocket, 19 is an endless chain, and 20 is a loading/unloading table.

Claims (1)

[Claims] 1. A drive shaft for rotating a belt is rotatably attached to a conveyor frame that is held movably in the horizontal direction, and a transmission mechanism applies rotation to this drive shaft through an endless chain from a rotational drive source, and the belt is rotated by a transmission mechanism. An article transfer device characterized in that the chain is arranged so as to be constantly bent in the backward direction of the conveyor frame by a guide roller that moves together with the conveyor frame at an intermediate position and a guide roller that is fixed at a predetermined position.