JPH04266337A - Blank pickup device of dry stock feeder - Google Patents

Abstract

PURPOSE:To form a structure suitable for energy saving on the whole by ensuring the attraction of a blank of a day stock feeder, and by inhibiting the double feeding. CONSTITUTION:A blank pickup device is formed out of a lifter 4, a sheet separator 6, and of a carrier means 8, which is supported by a bracket 11, which is vertically moved in the approaching and receding directions to the uppermost blank 5 loaded, along with a frame 15 to which the bracket is fixed, by a driving device 21.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to a lifter that is loaded with blanks and inched up according to the destack feed cycle, and a lifter that approaches the blanks from the side of the lifter and floats the uppermost blank among the loaded blanks. The present invention relates to a blank pickup device for a destack feeder, which comprises a sheet separator that moves the sheet separator, and a conveyor that runs a belt above the lifter in a direction substantially perpendicular to the direction of movement of the lifter.

0002

BACKGROUND OF THE INVENTION Conventionally, a blank pickup device for a destack feeder of this type has a lifter that loads blanks and moves up according to the destack feed cycle, and a lifter that is loaded with blanks and moves up according to the destack feed cycle. A blank pick-up device for a destack feeder was used, which consisted of a magnet for floating the uppermost blank, and a conveying means for running a belt above the lifter in a direction substantially perpendicular to the direction of movement of the lifter. However, in the blank pickup device of such a destack feeder, the uppermost blank of the stack is magnetically levitated, and is attracted and conveyed by a conveying device consisting of a magnetic conveyor. However, with this apparatus, the blanks cannot be picked up reliably, and after the topmost blank starts being conveyed, the next blank is picked up by the conveyor, resulting in a so-called two-sheet difference. Furthermore, it is uneconomical for the electromagnet to continue operating during the entire operation of the conveying device.

The present invention is a blank pickup device for a destack feeder, in which the conveying means itself is moved up and down to attract the blanks by the conveying means equipped with an electromagnet, or the blanks are attracted to the electromagnet of the conveying means by raising the lifter significantly. By adsorption, the blank pickup of the destack feeder can be ensured and the blank pickup work can be carried out in a labor-saving manner.

0004

[Problems to be Solved by the Invention] The problem to be solved is to provide a blank pick-up device for a destack feeder that ensures the adsorption of blanks in the destack feeder, prevents double sheet insertion, and saves energy as a whole. The basis of the task is to create a unique composition.

[0005]

[Means for Solving the Problems] The problems of the present invention are solved by the structures set forth in claims 1 to 5.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to FIG. 1, a blank pick-up device 1 for a destack feeder consists of the following components. 2 is a hydraulic cylinder, 3 is a lift table, and 4 is a lifter that is a combination of 2 and 3. 5 is loaded on lift table 3 (
6 is a sheet separator made of a permanent magnet or an electromagnet for separating the uppermost blank 5 of the stacked blanks 5; 7 is an instantaneous pick-up; 7a is an electromagnet; 8 is a conveying means; 9 is a pulley 10 is a sensor for detecting the adsorption of the blank 5 by the conveying means 8, and 11 is a bracket supporting both shafts 9, 9 so as to enable vertical movement of the conveying means 8 as a whole. The bracket 11 is fixed to a pedestal 15, and the pedestal 15 itself is configured to be moved up and down by a drive device, such as a cylinder piston device 21, a cam drive device, a servo motor, or the like. A reciprocating movement of the entire conveying means 8 in the directions of arrows A and B can be achieved by the up-and-down movement.

FIG. 2 shows the setting of the reference value of the lift amount δ when the conveying means 8 or the lifter 22 of the blank pickup device of the destack feeder according to the present invention is used to adsorb blanks. This lift amount indicates a constant distance δ serving as a reference between the lower surface of the belt and the upper surface of the uppermost blank of the sheet stack of the blank pickup device of the destack feeder. When the stacked blanks are picked up one by one and transported, the distance between the blank transport section and the top surface of the stacked blanks increases. In order to perform pick amplification of blanks, the distance between the blank transport section and the top surface of the loaded blanks is controlled and maintained at a constant value, which is the optimum value δ. The inching up of the lifter is performed by the cylinder-piston device 4, but the lifter according to this embodiment uses the cylinder-piston device 22 to perform a large vertical movement of the lifter in addition to the inching up.

FIGS. 1 and 2 show a system for interrupting electromagnets using sensors. The blanks attracted to the electromagnet by the blank destacking are conveyed by a conveyor belt. At this time, the electromagnets 7a arranged inside the belt can be shut off one by one as the conveyance of the blank progresses. In this method, a signal detected by the rear end of the blank is sent to the electromagnet 7a by a sensor that can be attached to a frame (not shown) on the side of the conveyance means 8.
A phototube 7b or a search coil 7c can be used as the sensor. Photocells 7b are arranged on both sides of the belt of the conveying means 8, close to the plane of the belt, and detect the passage of the blank. Search coil 7c
is arranged following the electromagnet 7a, and serves to detect the passage of the blank and cut off the power supply to the electromagnet. Note that the phototube 7b or the search coil 7c can also be formed to function as the sensor 10 for detecting the attraction of the blank 5 by the conveying means 8 and halving the voltage of the electromagnet 7a by setting the control circuit. .

FIGS. 1 and 2 further show the arrangement of sheet separators 6 in a blank pick-up device of a destack feeder. Here, depending on the shape or size of the blank 5, a plurality of them can be provided at one end of the blank 5 when viewed in the conveying direction or on both sides in the traveling direction. This makes it possible to reliably separate the blanks 5 and, as a result, to optimize the adsorption and conveyance of the blanks 5.

FIGS. 3 and 4 show time charts of the operation of the blank pickup device of the destack feeder.

FIG. 3 clearly shows a time chart in an embodiment of the upper and lower conveying means. Simultaneously with the lifter 4 starting to rise, the transporting means 8 itself is moved up and down by the vertical movement of the pedestal 15 by the drive device 21, and at this time, the upper position of the transporting means 8 is changed at the same time as the lifting of the lifter 4 in its operating cycle. In the upper end position of the lifter 4, the conveying means 8 is in the lower position and receives the blank 5, and in the lowering position of the lifter 4, the conveying means 8 is in the upper position. At the raised position of the lifter 4, the uppermost blank 5 of the stacked blanks 5 is separated from the loaded blanks by the float of the blanks 5 caused by the application of the sheet separator 6.The uppermost blank 5 is separated from the stacked blanks and is attracted by the electromagnet 7a. Ru. After a certain period of time has elapsed, the detection of the attracted blank 5 by the sensor 10 is confirmed, and the voltage of the electromagnet 7a is halved, and the conveying means 8 is operated by a drive servo motor (not shown), so that the blank 5 can be conveyed. The conveying means 8 is returned to the lower position together with the pedestal 15, and the blank 5 is moved by the operation of the drive servo motor.
can be transported. The sheet separator 6 is energized when the lifter 4 is in the raised position. Electromagnet 7a
Excitation of the sheet separator 6 is performed with a slight delay in the operation of the sheet separator 6. The servo motor is operated after the conveying means 8 reaches the upper position by raising and lowering.

According to FIG. 4, the lifter 4 is lifted directly to the rising end position suitable for attracting the blank 5 by the electromagnet 7a of the instantaneous pickup 7, and thereby the uppermost blank among the loaded blanks 5 is lifted. 5 is attracted by the electromagnet 7a. The inching up and down movement of the lifter 4 is repeated every time one blank 5 is sucked. Further, each time a blank 5 is picked up one by one, the lifter 4 increments upward by an amount corresponding to the thickness of one blank 5 and maintains the original position. Furthermore, in this embodiment, instead of the vertical movement of the conveying means 8 in the case of the previous embodiment, in addition to the inching upward movement, the lifter 22 itself is moved significantly up and down, so that blanks can be properly attracted.

[0013]

As explained above, according to the present invention, the blank pick-up can be carried out reliably and without inserting two blanks in the blank pickup device of the destack feeder, and the blank pickup work efficiency of the destack feeder can be improved overall. Labor-saving.

[Brief explanation of the drawing]

FIG. 1 is a diagram of an embodiment of a vertical movement type conveying means of a blank pickup device of a destack feeder according to the present invention.

FIG. 2 is a diagram showing an embodiment of the lifter vertical movement type of the blank pickup device of the destack feeder.

FIG. 3 is an operation time chart of the blank pickup device of the destack feeder according to the present invention, and is a diagram showing the case where the conveyance means is of the vertical movement type.

FIG. 4 is an operation time chart of the blank pickup device of the destack feeder according to the present invention, and is a diagram showing the case of a lifter vertical movement type.

[Explanation of symbols]

4... Lifter 5... Blank 6... Sheet separator 8... Conveying means 11... Bracket 15... Frame 21... Conveying device upper and lower drive device 22...
lifter

Claims (5)

[Claims] Claim 1: A lifter (4) loaded with blanks (5) and inching upward according to the destack feed cycle, and a lifter (4) loaded with blanks (5) that approaches the blanks (5) from the side of the lifter (4). Sheet separator (6) that floats the topmost blank (5) of )
and a conveying means (8) for running the belt above the lifter (4) in a direction substantially perpendicular to the direction of movement of the lifter (4).
The conveying means (8) is supported by the bracket (11), and the bracket (11) is supported by the bracket (11).
) is fixed together with the drive device (21)
), characterized in that it is movable up and down in the direction toward and away from the uppermost loaded blank (5). Claim 2: A lifter (22) loaded with blanks (5) and blanks (5) from the side of the lifter (22).
A sheet separator (6) that floats the uppermost blank (5) of the blanks (5) loaded close to the
) and a conveying means (8) for running a belt above the lifter (22) in a direction substantially perpendicular to the direction of movement of the lifter (22), and the blank conveying means (8) is attached to a bracket (11). The bracket (11) is fixed to a fixed frame (15), and the lifter (22)
2.) A blank pickup device for a destack feeder, characterized in that it is raised according to the destack feed cycle and is movable up and down in directions approaching and away from the conveying means (8). 3. The topmost blank (5) among the loaded blanks (5) is always held at a constant distance (δ) from the conveying device (8), and when the blank is picked up, 3. The blank pickup device for a destack feeder according to claim 1, wherein the entire conveyance device (8) or the lifter (22) is configured to move up and down by the certain distance (δ) each time. 4. A plurality of sheet separators (6) for floating the uppermost blank (5) among the stacked blanks (5) are arranged at one end of the sheet stack and/or on both sides. Claims 1 to 3
A blank pickup device for a destack feeder according to any one of the preceding items. 5. The separator (6) is composed of a permanent magnet or an electromagnet (7a), and the sensor (7b or 7c) detects the end of the blank (5), and as the blank (5) is conveyed, the individual electromagnets (7a) are sequentially separated. The blank pickup device for a destack feeder according to any one of claims 1 to 4, characterized in that: ) is cut off.