JP3082042B2 - Work transfer system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Field of Industrial Application) The present invention relates to a work transfer system mainly having a function of absorbing a displacement between a transfer device and a counterpart conveyor when transferring a work.

(Prior Art) As an example of a conventional technique, an example in which a transfer device is attached to a carrier will be described with reference to FIGS. 6 to 8. FIG. In the figure, 21 is a counterpart conveyor, 22 is a counterpart conveyor guide, 23 is a transfer device guide, 24 is a stop marker, 25 is a transfer roller, 26 is a transport vehicle, 27 is a traveling tape, 28 is a counterpart conveyor guide, 29 Is a counterpart conveyor upper stage, 30 is a counterpart conveyor side photoelectric tube, 31 is a counterpart conveyor lower stage, 32 is a carrier side photoelectric tube, 33 is a transfer table, and 34 is a battery.

As a positioning method for transferring a conveyed object between a conveyer and a counterpart conveyor, stop positioning of the conveyer is performed in a first step, and position adjustment of a transfer surface is performed in a second step.

First, as the stop positioning of the carrier, the transfer device guide 23 on the carrier shown in FIG.
Change the position of the stop marker 24 that determines the stop position of the transport vehicle to stop the transport vehicle at the position where the position of 28 matches,
The optimum position is detected while the carrier is actually running, and the stop marker 24 is positioned.

As a second step, as a means for adjusting the height of the transfer surface, the vertical position is determined by the photoelectric tubes attached to both the transfer table and the counterpart conveyor shown in FIGS. 7 and 8, and the height of the transfer surface is adjusted. It is carried out. That is, the transfer table
By moving 33 in the vertical direction, the position where light is captured is positioned between the photoelectric tube on the transporting vehicle side and the photoelectric tube on the counterpart conveyor side as the optimum position.

(Problems to be Solved by the Invention) In the above-mentioned conventional transfer device, it takes time to level and adjust the transfer device and the counterpart conveyor, and the state of the floor surface on which the transport vehicle travels, the loading load, and the like. The stopping accuracy of the carrier varies depending on the state of the battery, which is the power source of the carrier, and there has been a drawback that stable transfer cannot be performed. Also,
Since the transfer surface between the transfer table and the counterpart conveyor is positioned using the photoelectric tube, the positioning accuracy is hardly obtained, and the transfer surface is easily affected by external light or light reflection.
Furthermore, since the width of the transfer device guide is fixed to the maximum width, the loading direction of a work having a width smaller than the maximum width is tilted due to friction of rollers during conveyance or transfer, and the transfer at the counterpart conveyor portion is performed. The loading may become unstable.
That is, since the work is sent to the counterpart conveyor in an inclined state, there is a drawback that the work is caught by the counterpart conveyor guide.

The object of the present invention is to solve the conventional drawbacks, to absorb the displacement between the transfer device and the counterpart conveyor, to stabilize the transfer of the work, and to transfer various kinds of work to the same conveyor. Is to provide a work transfer system.

(Means for Solving the Problems) A work transfer system according to the present invention includes a transfer apparatus having a transfer table on which a work conveyed from a counterpart conveyor is transferred and which can be moved in a vertical direction, and the transfer apparatus. A transport device for moving the device in the front-rear direction, a first magnet member provided on the counterpart conveyor, and having a longitudinal direction extending in the vertical direction;
A second magnet member provided on the counterpart conveyor corresponding to a magnetic sensor and having a longitudinal direction in the front-rear direction, a first magnetic sensor provided on the transfer table, and detecting a magnetism of the first magnet member; A second magnetic sensor provided on the transfer table, for detecting the magnetism of the second magnet member, wherein the first magnetic sensor detects the magnetism of the first magnet and the second magnetic sensor is the second magnetic sensor.
The transfer table is moved up and down or back and forth so as to detect the magnetism of a magnet, thereby enabling positioning of the counterpart conveyor and the transfer table. The width of the workpiece to be transferred is detected by using a detection device such as a pressure sensor, and the guide width of the transfer apparatus can be automatically adjusted to a guide width suitable for the width of the workpiece.

(Operation) The present invention absorbs a positional shift between the transfer device and the counterpart conveyor by the above method, and stabilizes the transfer of the work. Also, it enables the transfer of various types of works on the same conveyor.

Embodiment An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a conceptual view of a counterpart conveyor in a work transfer system according to an embodiment of the present invention, FIG. 2 is a perspective view showing an appearance of the transfer device, and FIG. 3 is a transfer carrying the transfer device of FIG. It is a perspective view showing a car, 1 is a counterpart conveyor vertical position detection magnet, 2 is a bracket, 3 is a counterpart conveyor front and rear position detection magnet, and 4 is a bracket. Each magnet is fixed to a bracket and screwed to the conveyor body. 5 is a counterpart conveyor guide, 6 is a counterpart conveyor upper row, 7 is a counterpart conveyor lower row, 8 is a vertical position detecting magnetic sensor, 9 is a front and rear position detecting magnetic sensor, 10 is a work width detecting pressure sensor,
11 is a fixed guide of the transfer device, 12 is a movable guide of the transfer device, 13
Is a ball screw for moving the transfer device, 14 is a transfer roller, 15 is a transfer table, 16 is a controller motor unit, and 17 is a carrier.

The positioning in the vertical direction is performed by moving the transfer table 15 up and down, and detecting the magnet 1 for detecting the vertical position of the counterpart conveyor by the magnetic sensor 8 for detecting the vertical position. Similarly, the positioning in the front-rear direction is performed by operating the carrier 17 in the front-rear direction, and detecting the magnet 3 for detecting the front-rear position of the mating conveyor by the front-rear position detecting magnetic sensor 9.

First, the movement of the transfer table 15 until the work is carried out from the counterpart conveyor by the carrier 17 will be described with reference to FIG.

First, similarly to the prior art shown in FIG. 6, the transport vehicle 17 moves along the traveling tape 27 and stops at the position of the stop marker 24 to arrive at the counterpart conveyor (step 1). 15 is moved in the up-down direction to align the transfer surface in the up-down direction (step 2). As a specific example, when receiving a work from the counterpart conveyor upper stage 6, upon arrival, the transfer table 15 is moved upward or downward,
The magnet 1 attached to the counterpart conveyor by the vertical position detecting magnetic sensor 8 attached to the movable guide 12
Is detected, and vertical alignment is performed. After the vertical alignment is completed, the front-back alignment is performed (step 3). The transfer device is moved in the traveling direction and the front-back direction of the transport vehicle 17, and the magnet 3 attached to the counterpart conveyor is detected by the front-back position detection magnetic sensor 9 attached to the fixed guide 11, and the front-back position is adjusted. After the positioning in the up-down direction and the front-back direction is completed, the work is transferred from the other party (step 4). After the transfer of the work, the movable guide 12 is operated, the work is pressed against the fixed guide 11, the work width is detected by the pressure sensor 10, and the guide width is adjusted to that value (step 5). After the adjustment, the transfer is completed, and the carrier is started (step 6).

Next, the movement of the transfer table 15 until the work conveyed by the counterpart conveyor is unloaded will be described with reference to FIG.

The flow from the arrival of the carrier (step 7) to the positioning in the front-rear direction (step 9) is the same as in FIG. After positioning, unload the work to the other party (Step 1
0) Then, the movable guide 12 is returned to the maximum width so as to be able to cope with any work (step 11), and the transfer vehicle 17 is started when the transfer is completed.

(Effects of the Invention) According to the present invention, even if the upper and lower positions of the transfer device slightly vary depending on the state of the floor, the first magnet is long in the vertical direction. Even if the front and rear positions of the transfer device fluctuate slightly due to variations in the stopping accuracy when the transfer device arrives at the other conveyor, the second magnet is long in the front-rear direction. Magnetic sensor is the first
The magnetism of the magnet can be detected. As a result, the first magnetic sensor detects the magnetism of the first magnet, and the second magnetic sensor detects the magnetism of the second magnet, whereby the front and rear positions of the transfer table can be adjusted with high accuracy, and the transport The displacement between the transfer device and the counterpart conveyor due to the stop accuracy of the device, the state of the floor surface, and the like can be absorbed, and the work transfer can be stabilized. Furthermore, by preventing the displacement of the work due to the movement and vibration of the transfer device,
Transfer can be stabilized, and its practical effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a counterpart conveyor in a work transfer system according to an embodiment of the present invention, FIG. 2 is a perspective view showing an appearance of a transfer device, and FIG. 3 is a diagram in which the transfer device shown in FIG. FIG. 4 and FIG. 5 are flow charts showing the movement of the transfer device when transferring a work, FIG. 6 is a conceptual diagram of a conventional transfer vehicle and a counterpart conveyor, and FIG. FIG. 8 is a conceptual diagram of a counterpart conveyor having the same two-stage structure, and FIG. 8 is a perspective view of a carrier having the lifter type transfer device. 1,3 ... magnet, 2,4 ... bracket, 5 ... conveyor guide, 6 ... conveyor upper, 7 ... conveyor lower,
8,9 ... magnetic sensor, 10 ... pressure sensor, 11 ... fixed guide, 12 ... movable guide, 13 ... ball screw, 14 ...
... Roller, 15 ... Transfer stand, 16 ... Motor part, 17 ...
Transport vehicle.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI B65G 47/52 101 G05D 1/02 J G05D 1/02 T 3/12 E 3/12 B65G 47/22 B (72) Inventor Masayuki Kajiyama 1006 Kazuma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-167909 (JP, A) JP-A-63-198103 (JP, A) Jpn. (JP, U) Japanese Utility Model 60-143072 (JP, U) Japanese Utility Model 54-43514 (JP, Y1)

Claims (2)

(57) [Claims] 1. A transfer device having a transfer table on which a work conveyed from a counterpart conveyor is transferred and movable in a vertical direction, a transfer device for moving the transfer device in the front-rear direction, A first magnet member provided on the conveyor, the longitudinal direction of which is provided on the counterpart conveyor corresponding to the second magnetic sensor, and a second magnet member provided with the longitudinal direction of the front and rear direction, and provided on the transfer table. A first magnetic sensor that detects the magnetism of the first magnet member; and a second magnetic sensor that is provided on the transfer table and that detects the magnetism of the second magnet member. The transfer table is moved up and down or back and forth so that the magnetism of the first magnet is detected and the second magnetic sensor detects the magnetism of the second magnet. A work transfer system, wherein positioning of a counterpart conveyor and the transfer table is enabled. 2. The method according to claim 1, wherein the width of the workpiece to be transferred is detected by using a detection device such as a pressure sensor, and the guide width of the transfer apparatus can be automatically adjusted to a guide width suitable for the width of the workpiece. The work transfer system according to claim 1, wherein