JPS6093043A - Sheets supply device - Google Patents

Abstract

PURPOSE:To scoop up sheets surely one after another by allowing a pad to make square motion using a oscillative swinging mechanism and lifting mechanism, swinging each sheet group fore and aft per cycle of said motion, permitting air to bite into the pair of frontmost adjoining sheets, and thereby preventing fast contact of sheets with one another. CONSTITUTION:When a lifting/sinking pad 4 is in its lower dead point, the sheet 8 supported by this pad 4 takes an attitude as shown by solid line with less angle of forward tilting, and with the rise of pad 4 it escapes ahead through the work of a pad swinging mechanism 16 using cam 17, so that the sheet group in linkage with this escape motion is tilted a little forward by its own weight while supported by a sheet receptacle 2 at the bottom, and when the top of the foremost sheet reaches bite-in rollers 20, 29, this sheet is pulled up quickly and exhausted by belts 23, 27 to the bar cord sensor side 33. Meantime the pad 4 is sunk by a lifting/sinking mechanism 12 with a crank arm 13, and at the same time moved backward by said swinging mechanism 16 so as to receive the sheet group now going to incline, and further pushes the frontmost sheet 3 a little backward to allow the air to bite in the adjoining sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sheet feeding device suitable for being incorporated into, for example, a counting device for unfolded sheets made of resin or paper before being assembled into a videotape case.

(Prior art) For example, before assembling a videotape case, various types of printing have already been applied to the cardboard-like resin board, and the unit price is relatively high, so a barcode sensor is incorporated into the counting device.
We are checking to see if other varieties are mixed in. However, conventionally, in order to supply sheets to a portion of the barcode sensor, K uses a vacuum to suck up the sheets one by one and transfer the sheets to a conveyor or the like. However, in that case, it takes time to pick up the paper, and only about 80 sheets can be processed per minute.

(Objective of the Invention) The object of the present invention is to increase the number of sheets to be processed by placing a group of sheets in an upright position against a pad having a large coefficient of friction and scooping up sheets one by one with the pad.

(Structure of the Invention) The present invention includes a conveyor that is slightly tilted forward and downward, a sheet receiver at the front end of the conveyor, a lifting pad that receives sheets in a nearly vertical front-stop position above the sheet receiver, and a guide for the pad. It includes a pad swinging mechanism that engages with the guide, a pad lifting and lowering mechanism, and a sheet gripping roller above the pad.
This sheet supply device is characterized in that a pad swinging mechanism and a pad elevating mechanism are interlocked and connected so that the pad retracts slightly forward while receiving the load of the following sheet group when scooping up the frontmost seat tray. With this device, a group of seats in an upright state is swayed back and forth by the square motion of the pad every cycle, and air is trapped between the front and rear adjacent seats, preventing the seats from coming into close contact with each other, making it possible to drive at high speeds. You will also be able to reliably pick up each sheetra one by one.

(Example) In FIG. 1, 1 is a conveyor, 2 is a sheet receiver near the front end of the conveyor l, 8 is a large number of sheets, and 4 is a lifting pad that supports the entire front end of the sheet 3. The conveyor 1 is constructed by completely passing a plurality of belts around front and rear rollers 5 and 6, and the upper surface of the belt is tilted slightly forward and downward, so that the angle α of the upper surface of the belt is about 15 degrees, for example, and the upper surface of the belt is directed forward as indicated by the arrow. Driven slowly. The forward speed of the upper surface of the belt is determined so that the lift pad 4 advances slightly more than the thickness of the sheet 3 during the cycle in which the front end sheet 8 is scooped upward. Even when placed in an unfolded state (code 8a), each sheet 8
The lower end of a is driven forward by the conveyor 1 and the contact pressure is quickly reached.

The lifting pad 4 is made of a rubber material with a high friction coefficient that is generally used for anti-slip belts, etc., and is provided on two sides with an interval in the direction perpendicular to the plane of the paper (horizontal direction) in FIG. 2), the holder 7 of each pad 4 is fitted to the guide rod 8 so as to be able to move up and down, and the central part of the holder 7 is connected to the crank arm 1B of the pad elevator s12 via the bin 9, link 10, and bin 11. are doing. The lower end of the guide rod 8 is supported by a fixed support shaft 14, and the roller 15 provided at the upper end of the guide rod 8 is supported by a pad swing mechanism 16.
The cam 17 is brought into contact with the elasticity of the tension spring 18.

The crank arm 1B and the cam 17 are synchronized, and when the pad 4 is at the bottom dead center as shown in FIG. 1, the maximum lift portion of the cam 17 contacts the roller 15 and pushes the roller 15 to the rearmost position. Then, when the crank arm 18 rotates 180 degrees clockwise as shown by the arrow, the cam 17 also rotates 180 degrees in the same direction, and the minimum lift portion (base surface) of the cam I7 contacts the roller 15, causing the roller 15 to rotate. Retract to the frontmost position. When the crank arm 18 then rotates another 180 degrees and the pad 4 returns to the bottom dead center in FIG. 1, the maximum lift portion of the cam 17 pushes the roller 15 to the rearmost position shown.

Above the lifting pad 4 are a belt 28 wound around rollers 20.21.22, a belt 27 wound around rollers 24.25.26, and a spring 2 facing the roller 20.
A roller 29 is disposed which is seated by the elasticity of the roller 8. And Laura 20.29F! , forming a gripping roller that grips the sheet 8t which is immediately lifted upward by the elevating pad 4 while receiving the load of the eight-layer sheet group. Further, the belts 2B and 27 are brought into close contact with each other between the rollers 24.2i22, and the belts 2B and 27 are driven so that the contact portion moves in the direction of the arrow. Further, 80 and 81 are rollers, 82 is a belt, and 88 is a bar code sensor.

Next, the operation will be explained. When the device is started, the sheets 8 supplied onto the conveyor 1 are driven forward by the conveyor belt and brought into close contact with each other, but since the elevating pad 4 generally performs a spherical motion, the sheet group as a whole sways back and forth. While moving, the sheets 8 at the front end are sequentially fed upward. That is, when the elevating pad 4 is at the bottom dead center position (the position shown in FIG. 1), the seat 8 is supported by the elevating pad 4 and assumes the posture shown by the solid line with a small forward tilt angle, but the elevating pad 4 rises. As the pad 4 moves forward (to the right in Figure 1) due to the action of the cam 17, the sheet group tilts slightly forward due to its own weight while being supported by the seat support 2 at the lower end in conjunction with the retraction movement of the pad 4. However, by the time the sheet reaches the 3° position, the upper end of the frontmost sheet reaches the gripping roller 20.29, is quickly pulled upward, and is discharged to the barcode sensor 88 side by the belt 28.27. The sheet 3 at the front end is grabbed by the pad 4 and scooped up by the Ronilla 20.29, and at the same time the pad 4 is lowered by the action of the crank arm 18, and at the same time by the action of the cam 17 it is moved rearward (towards the left in Fig. 1). )-1 Move and catch the group of seats that are about to lean forward, and further push the front end seat 3 slightly backward. By this operation, the upper end of the seat group as a whole is pushed back to the rear, and the front end seat occupies the entire position indicated by the solid line. In this manner, each cycle in which the elevating pad 4 moves up and down, the stacked sheet group swings back and forth, and an appropriate amount of air is trapped between adjacent sheets, thereby preventing extreme adhesion.

(Effects of the Invention) As explained above, according to the present invention, when the conveyor 1 is slightly tilted forward and downward, the sheets 3 that are somewhat roughly arranged on the conveyor 1 are quickly brought into a parallel and substantially close contact state. They are aligned and pressed against the pad 4 in an optimal posture. In addition, the pad 4 uses a cam 17, a pad swinging mechanism 16, and a crank arm 13.
The pad elevating mechanism 12 uses a pad lifting mechanism 12 that moves forward when ascending and returns backwards when descending, making it possible to move the seat group forward and backward every cycle. Appropriate air is trapped between adjacent sheets, ensuring good separation and ejecting one sheet at a time.Furthermore, the pad 4 prevents the following sheets from falling over when the frontmost sheets 1-8 are immediately lifted up. By making good use of this load l, the frontmost sheet 8 and the pad 4 are kept in close contact with each other.
Each sheet can be scooped upward, making the sheet feeding operation stable.

(Other Embodiments) In place of the guide rod 8, a rail, plate, etc. that supports the lifting pad 4 may be adopted. Pad rocker #116
It is also possible to use a cam or crank arm. As the pad rocking all' 16 and the pad elevating mechanism 12, an interlocking mechanism using a combination of links may be considered in addition to the si shown in the drawing.

[Brief explanation of the drawing]

FIG. 1 shows a sheet 8 according to the invention (schematic view of the right side of the feeding device,
FIG. 2 is a directional view of the section shown by the arrow ``■'' in FIG. 1... Conveyor, 2... Sheet receiver, 4... Elevating hat, 8...
Guide rod, 12... Pad lifting mechanism, 16...
Pad swing mechanism, 20.29...Roller patent applicant
Koji Saeki

Claims (1)

[Claims] A conveyor that is slightly tilted forward and downward, a sheet holder at the front end of the conveyor, an elevating pad that receives the sheet in a nearly vertical upward position above the sheet holder, a pad guide, and a swinging pad that engages with the guide. The pad swing mechanism and the pad are equipped with a pad lifting mechanism, a pad raising/lowering mechanism, and a sheet gripping roller above the pad. A sheet feeding device characterized by interlocking and connecting a lifting mechanism.