JPH0220471A - Cargo removing device for transfer vehicle - Google Patents

Abstract

PURPOSE:To miniaturize a driving device, to make the whole body less bulky and to save the labor in maintenance by forming a removing device by a roller unit consisting of a power roller, an idling roller and a friction gearing relay rotary body. CONSTITUTION:Loading from a station ST to a transfer vehicle 1 stops the power roller 5 of the tip in the removing direction of the load of the roller conveyor of the transfer vehicle 1 and rotates the other roller 5 toward the removing direction. On the other hand the conveyor 2 of the station ST is actuated and when the load transferred accordingly is detected by the optical sensor 9 just before the stopped roller 5, it is performed by stopping all of the roller 5 of the conveyor 2 of the transfer vehicle 1 and the conveyor 2 of the station ST. In this case, the load being transferred more than the specified position of a loading part can be checked by the friction between the rollers 5 of the removing direction tip with the inertia force by the roller 5 rotated in the removing direction because this is performed by stopping the roller 5 of the removing direction tip.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applicable to, for example, assembly lines in which various parts,
A transport vehicle for transporting various loads such as packets containing parts and pallets loaded with multiple packets from a sending load transfer station installed beside the line to a receiving load transfer station; A transfer device used to transfer loads to and from a load transfer station. Specifically, it is a transfer device that is used to transfer loads to and from a load transfer station. Specifically, a conveyor or load transfer station is equipped with a roller carrier or a bear for transferring loads between them. In other words, the present invention relates to a transfer device for a transport vehicle that uses a roller conveyor for transfer.

[Conventional technology]

Conventionally, in this type of roller conveyor type transfer device, the eighth
As shown in the figure, the roller conveyor (2) has a chain (jl ), each roller (1
0).

(Problem to be Solved by the Invention) However, in the above conventional technology, the driving force of one electric motor is transmitted to the plurality of rollers via a chain to drive the plurality of rollers at once. We need something big, something big, and as a result,
There were the following inconveniences.

In other words, in this type of transfer device, in order to avoid interference of the electric motor with transfer as much as possible, the electric motor (12) is usually disposed below the roller group, as shown in FIG. However, in such a case, if the electric motor is large as in the conventional case, a vertically large installation space for the electric motor is required, making the device bulky.

Moreover, since the transmission is carried out using a chain, maintenance such as adjusting the chain tension and oiling is frequently required to maintain good transfer performance, which is extremely time-consuming. When the number and dimensions of the rollers installed in parallel change depending on usage conditions such as the size and weight of the load, the winding of the chain for driving force transmission must be designed and manufactured taking into consideration the dimensions and arrangement route. It was difficult to respond to specification changes, such as the need to change the specifications.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks.

[Means to solve the problem]

In order to achieve this object, the transfer device for a transport vehicle according to the present invention is characterized in that the roller conveyor is constructed using power rollers each having a separate drive device.

It is preferable that the roller conveyor is configured using a roller unit including the power roller, an idling roller, and a friction transmission type relay rotating body that transmits driving force from the power roller to the idling roller.

Furthermore, there are two relay rotating bodies, one that enters between the power roller and the idling roller from above and one that enters from below, and both of them move in the direction of pressing against the power roller and the idling roller. It is preferable that the

[For production]

In other words, since the rollers are power rollers that have a drive device to rotate themselves, a drive force transmission means that uses a chain between each roller and a separate electric motor to transmit the drive force is required. This is no longer necessary, and when configuring a roller conveyor, only the installation position and number of power rollers need to be considered. Since the power roller drive device drives only a small number of power rollers, such as one or two, a small drive device with a low driving force can be used as the drive device.

In particular, in the case of claim 2, it is only necessary to provide one drive device for two rollers, so the drive device is only slightly larger, and the need for a drive device such as a motor, which tends to be expensive, is reduced. It's done.

Furthermore, in the case of claim 3, the power roller rotates in a direction that moves the surface facing the idle roller downward, and the upper relay rotating body moves downward as the power roller rotates. On the other hand, when the power roller rotates in the opposite direction to the above, the lower intermediate rotating body moves upward with the rotation of the power roller, that is, when the power roller rotates in the opposite direction. Since a moving force is applied to the pressure contact side, transmission by the relay rotating body can be performed reliably without slipping when the power roller rotates in either forward or reverse directions.

〔Effect of the invention〕

Therefore, according to the present invention, since the drive device can be small-sized, the vertical height of the space for installing the drive device formed below the roller group is low, so that the overall bulk can be made low. Since the conventionally required drive force transmission means is no longer required, it is possible to save labor on maintenance, and it is now possible to easily respond to changes in specifications.

Particularly, when the second aspect is adopted, the cost can be reduced, and when the third aspect is adopted, the intended transfer can be carried out reliably while reducing the cost.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 6, the manufacturing and transport equipment is configured to move the transport vehicle (1) along a travel line so that the transport vehicle (1) travels between the transport vehicle (1) and a plurality of load transfer stations (ST). (G), and a load transfer device for transferring loads between the transport vehicle (1) and the station (ST) with the conveyance vehicle (1) next to the station (ST), as shown in Figure 1. It is equipped with

As shown in FIGS. 1 and 5, the transport vehicle (1) has a pair of front and rear loading parts (la) on the upper part of the traveling vehicle body (IA).
, (lb), and the traveling vehicle body I
In A), a pair of left and right propulsion wheels (3) are disposed at the front and rear intermediate portions, a pair of left and right idle wheels (4) are disposed at each of the front and rear ends, and the rotational speed of the propulsion wheels (3) is It is configured to steer by making a difference between the two.

The load transfer device includes a load loading section (l) of the carrier vehicle (1).
a), (lb) and the loading section (IC) of the station (ST) are each provided with a roller conveyor (2).

The roller conveyor (2) of the transport vehicle (1) has two power rollers (5) supported by a conveyor frame (C) via bearings (B) with both ends located at both ends in the transport direction. , a plurality of roller units (8) are attached to a conveyor frame (C) in a state in which they are arranged side by side at an interval in the conveyance direction at an intermediate portion in the conveyance direction.

As shown in FIG. 4, the power roller (5) has a single-motion motor (5b) that is capable of forward and reverse rotation built into one end of the roller (5a) in the longitudinal direction as a drive device. (5b) uses the roller (5a) as a rotor and the support shaft (5C) as a stator.

As shown in FIGS. 2 and 3, the roller unit (8) includes two power rollers (5) and an idling roller (hereinafter referred to as free roller) (6), which are arranged in parallel as described above. and one longitudinal end of the rollers (5) and (6) (
D) Between the power roller (5) and the free roller (6)
(hereinafter referred to as friction rollers) (7a)
, (7b) from above and below, and place the friction rollers (7a) and (7b) in pressure contact with the power roller (5) and free roller (6), that is, the upper friction roller (7a). is provided below, and the lower friction roller (7b) is provided with a spring (7C) that urges it upward.

Therefore, the friction roller (7a) that comes into pressure contact with the power roller (5) as the power roller (5) rotates;
(7b) rotates in the opposite direction to the power roller (5), and as the friction rollers (7a) and (7b) rotate, the free roller (6) comes into pressure contact with the friction rollers (7a) and (7b). The friction rollers (7a) and (7b) rotate in the opposite direction, and as a result, the free roller (6) rotates in the same direction and at the same speed as the power roller (5). In particular, in the roller unit (8) configured as described above, the power roller (
5) rotates in a direction that moves the surface facing the free roller (6) downward, the lower friction roller (7b) is given a moving force in the direction of escape from the power roller (5). However, the upper friction roller (7a) is given a force to move downward, that is, to the pressure side, so it comes into strong pressure contact with both rollers (5) and (6), and as a result, the power roller (5) Frictional transmission from the to the free roller (6) via the friction roller (7a) is reliably performed without slipping. On the other hand, when the power roller (5) rotates in a direction that moves the surface facing the 7-lead roller (6) upward, the upper Frixigin roller (7a) moves away from the power roller (5). However, the lower friction roller (7a) is given a moving force upwards, that is, toward the compression side, so that the free roller (5) is moved from the power roller (5) in the same way as described above. 6) through the friction roller (7b) is reliably performed without slipping. That is, the two friction rollers (7a) and (7b
) so that the rotational force is equally reliably transmitted to the free roller (6) in either the forward or reverse direction of rotation of the power roller (5>).

In addition, power ports and
- On the inside of the roller (5), the roller conveyor (2) is installed.
Completion of loading and unloading operations by the load loading section (la)
, (lb) is provided with a photo ink sensor type optical sensor (9) for detecting the presence or absence of cargo. The optical sensor (9) is provided with a pair of light emitters (!la) and light receivers (9h) arranged opposite to each other at both ends of the vehicle body in the front-rear direction.
As it is carried in and out of (la), <lb), 1,
The transmitted light from the light projector (9a) to the light receiver (9b) depends on the cargo.

The structure is such that the cargo is detected by being blocked by the

Also, the roller conveyor (2) on the station (ST) side
The structure is similar to that of the transport vehicle (1) described above, and the explanation thereof will be omitted.

Transport vehicle (1) using the load transfer device configured as above
Next, the loading and unloading between the station (ST) and the station (ST) will be described.

In order to load the load from the station (ST) to the transport vehicle (1), the first power roller (5) in the load transfer direction on the roller conveyor (2) of the transport vehicle (1) is stopped, and the other The power roller (5) of the station (ST) is rotated in the transfer direction, while the roller conveyor (2) of the station (ST) is operated, and the load conveyed accordingly is moved to the position just before the stopped power roller (5). Based on what is detected by the optical sensor (9), all the power rollers (5) of the roller conveyor (2) and the roller conveyor (2) of the station (ST) are stopped in the transport vehicle (1). To do this. In this case, the first power roller (5) in the transfer direction is stopped to perform the transfer, so the inertial force of the power roller (5) rotated in the transfer direction moves the load over a predetermined position on the load storage section. This can be prevented by friction between the paper and the first power roller (5) in the transfer direction. Also, from the transport vehicle (1) to the station (ST)
) is carried out by operating all the power rollers (5) on both roller conveyors (2).

Although the details are omitted, the transport vehicle with the above-mentioned configuration is
As a guidance device for driving along a predetermined travel line, a guidance line formed of light reflective tape, guidance wire, etc. is attached along the travel route, and the vehicle body (A)
A steering control sensor for detecting deviation in the width direction with respect to the guide line is provided on the side, and the left and right propulsion wheels (3) are operated based on the detected information by the steering control sensor.

(3) By controlling the respective drives, the transport vehicle (1)
One example is one that controls turning so that the vehicle automatically travels along a predetermined route. In addition, in order to automatically stop the transport vehicle (1) at the load transfer station (ST) or to branch or merge in a predetermined direction at an intersection, the merging/branching position, stopping position, etc. are indicated on the travel line side. In addition to providing a mark, a mark sensor or the like for detecting the mark is also provided on the vehicle body side. Furthermore, a transport vehicle (1)
A communication device and the like for instructing various control information such as traveling route information to the vehicle will be provided on each of the traveling line side and the transport vehicle (1) side.

[Another example]

Other embodiments of the present invention will be described below.

[1 Co. In the above embodiment, the roller conveyor (2) is constructed using a roller unit I-<8) consisting of a power roller (5) and a free roller (6), but all the rollers are replaced by a power roller ( 5) may be used.

[2] In the above embodiment, the roller unit (8) is composed of one power roller (5) and one free roller (6), but as shown in FIG. (
5) and a plurality of free rollers (6), the driving force may be transmitted between the rollers by seven retraction rollers (7a) and (7b), respectively.

[3] The power roller (5) used in the above embodiment drives the roller main body by the motor (5b) configured inside the power roller (5), but the roller (5a) has a longitudinal direction externally connected to the roller axis. The power roller (5) may be configured by arranging a small motor.

[4] In the above embodiment, when stopping the load transfer by the roller conveyor (2), the first power roller ( 5) is stopped from the beginning, but the power roller (5) may be rotated in the opposite direction to the load transfer direction to prevent movement due to its inertial force.

[5] In addition to the example described in [4], the power roller (
5) may be rotated in the opposite direction for a predetermined period of time to block its inertial force and then stopped.

[6] In the above embodiment, the transport vehicle (1) side and the station
The present invention was applied to the roller conveyor (2) on the ST side (ST), but the present invention also applies to the transport vehicle (1) and the station (ST).
It may be applied only to either one of the roller conveyors (2) and the roller conveyor (2). Further, in the above embodiment, there are two loading portions (la).

(1b), but the present invention also includes:
It is also applicable to those having one or three or more loading parts.

[7] Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the accompanying drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the load transfer device for a transport vehicle according to the present invention, and FIG. 1 is a plan view of the transport vehicle and the station, FIG.
Fig. 3 is a cross-sectional view and longitudinal sectional view of the roller unit, Fig. 4 is a partially cutaway front view of the power roller, Fig. 5 is a side view of the transport vehicle, Fig. 6 is a plan view of the transport equipment, and Fig. The figure is a cross-sectional view of a roller unit showing another embodiment of the present invention. FIG. 8 shows a side view of a roller conveyor according to the prior art. (2)...Roller conveyor, (5)...Power roller, (6)...Idling roller, (7)...Relay rotating body.

Claims (1)

[Scope of Claims] 1. A load transfer device for a transport vehicle, in which a transport vehicle or a load transfer station is provided with a roller conveyor (2) for transferring loads between the transport vehicle and the load transfer station; Conveyor (2)
A load transfer device for a transport vehicle, which is constructed using power rollers (5) each having its own drive device. 2. The roller conveyor (2) is connected to the power roller (
5), an idling roller (6), and the power roller (5)
2. The transfer device according to claim 1, wherein the transfer device is constructed using a roller unit comprising a friction transmission type relay rotating body (7) that transmits driving force from the roller to the idle roller (6). 3. The relay rotating body (7) has two types, one that enters between the power roller (5) and the idle roller (6) from above and the other that enters from below, and both of them are connected to the power roller (5). The load transfer device for a transport vehicle according to claim 2, wherein the load transfer device for a conveyance vehicle is biased to move in a direction in which it comes into pressure contact with the idler roller (6).