JPH0133410B2 - - Google Patents

Description

Detailed Description of the Invention (Object of the Invention) The present invention is an automatic method for the subsequent processing step in which the topmost sheets of thin sheets such as veneer plywood, veneer veneer, particle board, hardboard, etc. are fed out one by one from a pile of thin sheets. The present invention relates to an automatic feeding device for thin plates that are supplied at a high speed. Generally, automatic feeding devices using suction devices often feed out two sheets, so the waiting time is required for air to flow between the first and second layers and the sheets to separate naturally from each other. This resulted in a serious defect that prevented frequent, high-speed feeding. The present invention provides an automatic sheet feeding device that does not require double sheet feeding and is excellent in high frequency and high speed compatibility by adding a new type of intermittent feeding mechanism to the conventional suction feeding and separation feeding mechanisms. The purpose is to

(Structure of the Invention) As shown in FIG. A thin plate adsorption/feeding mechanism 5 consisting of a suction box 3 and a suction blower 4 disposed to cover the entire surface, an elevating table for the stacking thin plate 1 provided below the suction/feeding mechanism 5, and an inside of the suction/feeding mechanism 5. A gap regulation roller 6 is provided at the front part of the plate 1 and above the conveyance line of the thin plate 1 that is fed out from the lifting table, and a triangular gap regulation stopper 7 is provided below the gap regulation roller 6. A separating and feeding mechanism 8 for the thin plate 1 is provided, and the thin plate is moved up and down between the thin plate 1 on the top surface of the stack located at the rear part of the suction and feeding mechanism 5 and the conveying surface of the suction and feeding mechanism 5. This is an automatic thin plate feeding device comprising a reciprocating actuator 9 and a shoe 10, which are provided so as to press the rear end of the top surface of the sheet and release the sheet.

That is, the automatic feeding device of the present invention first raises the lifting table 12 until the distance between the uppermost stacked thin plate 1 and the belt 2 of the suction feeding mechanism 5 is such that, for example, one or two thin plates 1 can be inserted therein. At this time, the shoe 10 of the pressing and stopping mechanism 11 is lowered by a reciprocating device 9 consisting of an air cylinder or the like. Therefore, since the rear end of the thin plate 1 on the uppermost surface is pressed and restrained by the shoe 10, even if the belt 2 of the suction/feeding mechanism 5 rotates, the thin plate 1 is only attracted at the front and curved into an arched shape. There is no automatic feeding operation. Also, thin plate 1 located at the second layer of the pile.
Even if the thin plate 1a on the top surface is lifted up all at once with the suction action of the thin plate 1 on the top surface, the second thin plate 1a will separate after a moment because air will flow between the layers due to its own reaction force. It will return to its original position (see Figure 1). Next, the top thin plate 1
When the shoe 10 that was restraining the movement of the thin plate 1 rises due to activation of the reciprocating actuator 9 and releases the pressing restraint on the rear end of the uppermost thin plate 1, the rear half of the thin plate 1 is instantly attracted to the belt 2 and released. is performed, and the second thin plate 1a is also completely separated (see FIG. 2).
The thin plate 1 fed out by the belt 2 passes through the separation feeding mechanism 8 located in front of the suction feeding mechanism 5, and even if there is a second or subsequent thin plate pushed out somewhat to the front, this is reliably separated. 1 in the subsequent process
You will have to pay out one by one. and the top thin plate 1
When the shoe 10 is fed out and its rear end passes directly under the shoe 10 of the pressing and stopping mechanism 11, the shoe 10
is lowered again by the reciprocating device 9 to press and stop the second thin plate 1a, which will be the uppermost surface, in preparation for the next feeding operation (see Fig. 3). Further, the upward movement of the shoe 10 is controlled by a detection signal of the suction state of the thin plate 1 by a rise control detector 13, which is provided near the conveyor line of the suction and feeding mechanism 5 and is comprised of a limit switch, a photoelectric switch, etc. The raising and lowering operations are automatically controlled by the detection signal of the rear end of the thin plate 1 by the lowering control detector 14, which consists of a limit switch, a photoelectric switch, etc., installed near the 10, and also for a predetermined period of time in connection with the subsequent process. Above-mentioned rise control detector 13 or descent control detector 14
is not turned ON or OFF, the reciprocating device 9 is controlled to be forcibly operated, and the shoe 10 is configured to strongly strike the rear end of the thin plate 1. Although the level is not shown, a level detector such as a photoelectric switch is installed on the side of the stack, and the elevating table 12 is automatically controlled based on the detection signal.

(Effects of the Invention) As described above, the present invention provides the separation feeding mechanism 8 in the front part of the suction feeding mechanism 5, and also provides the pressing restraining mechanism 11 in the rear part of the suction feeding mechanism 5, thereby achieving the following effects. The thin plate 1 on the top surface of the stack is pressed and restrained by the shoe 10 of the pressure restraining mechanism 11 in a suction atmosphere that exerts a strong suction force upwardly over substantially the entire upper surface of the deposited thin plate at all times. With the gap between the belt 2 and the thin plate 1 made as small as possible, air for separation can be allowed to flow in between the second sheet and the second sheet when the feeding operation is stopped, thus reducing the amount of air required for re-adsorption. It was possible to significantly shorten the time and demonstrate high frequency and high speed response. Furthermore, in the present invention, the rear end of the thin plate 1 is pressed and restrained by the shoe 10 of the pressing and restraining mechanism 11, so that the entire structure is in a bowed suction position, and the second thin plate 1a also instantly touches the uppermost thin plate. Although the second thin plate 1a is lifted together with the first thin plate 1a, due to its own rigidity, the second thin plate 1a immediately separates from the uppermost thin plate 1 and returns to its original position, which is repeated naturally. Furthermore, even if there is a second or subsequent thin plate pushed out somewhat toward the conveyance direction side by the above operation, they will be removed by the gap regulating roller 6 of the separation and feeding mechanism 8 provided at the front part of the suction conveyance mechanism 5. Not only is the second thin plate 1a reliably stopped by the triangular gap regulating stopper 7, and only the uppermost thin plate 1 is fed out,
In the case of plywood, etc., if the adhesion between the first and second sheets is strong due to adhesive etc. protruding from the periphery, and both sheets are stopped at the position of the gap regulating stopper 7, the above-mentioned pressing stop mechanism Since the shoe 10 of No. 11 acts to strongly strike the rear end of the thin plate 1 in a close contact state from above, the close contact state is released and only the topmost thin plate 1 is paid out without staying there for a long time. It is an invention with extremely remarkable implementation effects, including separation and feeding effects.

[Brief explanation of drawings]

The figure shows an example of implementation of the present invention,
1 to 3 are operation diagrams. 1... Thin plate, 2... Belt, 3... Suction cap, 4
...Blower, 5...Adsorption/feeding mechanism, 6...Gap regulation roller, 7...Gap regulation stopper, 8
... Separation feeding mechanism, 9 ... Reciprocating operation device, 10 ...
...Show, 11... Pressure restraint mechanism.

Claims (1)

[Claims] 1 Belt 2 that conveys the thin plate 1 while adsorbing it to the bottom surface
and a suction box 3 disposed to cover substantially the entire surface of the belt 2 so as to apply a suction force to substantially the entire surface of the belt 2.
a suction/feeding mechanism 5 for the thin plate 1 consisting of a suction blower 4; an elevating table for the stacked thin plate 1 provided below the suction/feeding mechanism 5; A mechanism for separating and feeding the thin plate 1, which includes a gap regulating roller 6 provided above the conveyance line of the thin plate 1 fed out from the table, and a triangular gap regulating stopper 7 provided below the gap regulating roller 6. 8 is located at the rear part of the suction/feeding mechanism 5 and moves up and down between the thin plate 1 on the top surface of the stack and the conveying surface of the suction/feeding mechanism 5 to press and stop the rear end of the top surface of the thin plate 1. A reciprocating device 9 and a shoe 1 provided so as to be released
1. An automatic thin plate feeding device characterized by comprising a pressing and stopping mechanism 11 made up of 0.