JPS6118650A - Paper feeding apparatus - Google Patents

Abstract

PURPOSE:To prevent the bending of a blank sheet in feeding by installing a plurality of supporting bodies which form contact or noncontact state between the blank sheet and a feeding belt independently and in synchronization with the paper feeding timing. CONSTITUTION:A paper feeding apparatus is constituted of a shutter 2, a pair of side guides 3, and a plurality of belts 4, and a blank sheet S is supplied by the friction between the belt 4 and the sheet S. In this case, a plurality of rollers 23 and 23' as supporting body which control the contact and noncontact state between the sheet S and the belt 4 are installed independently and in synchronization with the paper feeding timing, between the belts 4. When the blank sheet S in a B-type box whose A surface is longer than other surfaces B-D is supplied, the rollers 23 and 23' are lowered when the surfaces B-D pass through the shutter 2, and noncontact state is generated between the surfaces B-D and the belt 4, and then the rollers 23 and 23' are raised to contact the surface A with the belt 4, and the bending of the sheet S is prevented.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a drawing machine that manufactures a paper box by holding a die-cut flank sheet between belts, moving it straight, bending it, and gluing it at a predetermined position; The present invention relates to a so-called folder gluer, and specifically relates to an improvement of a paper feeding device for a folder gluer.

<Prior Art> Conventionally, as this type of paper feeding device, one using vacuum suction and one using friction between a belt and a blank sheet have been generally used. It is about improvement.

The belt-type sheet feeding device described above loads blank sheets cut into a predetermined shape onto a drive unit equipped with a plurality of end shields with a relatively large coefficient of friction that rotate intermittently or continuously. A shutter is provided at the front end of the blank sheet in the traveling direction, and a part of the hopper is formed by a pair of side guides on both sides of the blank sheet. At this time, the gap between the lower end of the shutter and the belt is adjusted so that the blank sheets are reliably fed one by one to the next process.

<Problems to be Solved by the Invention> In the conventional sheet feeding device configured as described above, when manufacturing a paper box called a B-type box, blank sheets are fed straight to the direction of travel. The problem was that it would bend. In the folder gluer, the blank sheet is held by a belt and moves straight while forming the box, so if the blank sheet is fed from the paper feed section in a bent state, it is impossible to obtain a paper box with the specified shape. There is a problem with becoming.

<Means to solve the problem> As a result of investigating the cause of paper bending during paper feeding, we found that, as shown in Fig.
, is longer than the D side, which is why the B and C sides.

The D side? Even after passing through a portion of the paper, side A has not yet completely passed through, so paper feeding resistance is applied due to the weight of the blank sheet above it. On the other hand, B and C.

Since side 0 is in contact with the belt, paper is being fed.

Also, while the B, C, and D sides of the next blank sheet come into contact with the belt and the sheet feeding operation starts, the A side does not come into contact with the belt yet. Therefore, at this time, the B, C, and D sides of the next blank sheet are already advanced in the direction of travel than the A side, and when this plank sheet is fed, it is fed in a bent state from the beginning. The work will be done. In the series of paper feeding operations, the above steps are performed continuously.

In order to solve this problem, it would be good if it were possible to cut off the contact between the upper blank sheet and the belt until each blank sheet completely passes through the stacking section with the upper blank sheet.

As described above, when feeding the stacked blank sheets, the present invention utilizes cams, levers, etc. to bring the blank sheets into contact with the belt in accordance with the feeding timing, so that unnecessary parts do not come into contact with the belt. This is an attempt to control a non-contact state.

Further, as a support that comes into direct contact with the blank sheet, for example, a roller or a bar whose surface is coated with a low-friction material is used.

<Function> A plurality of supports 23, 23' (hereinafter described as rollers 23, 23') are provided as shown in FIGS. , 23' are all raised, so that the blank sheet and the belt are in a non-contact state. In FIG. 1(B), all of the rollers 23° and 23' are lowered, and the blank sheet and the belt are in contact with each other, so that the sheet is being fed. FIG. 1(c) shows the state where the B, C, and D sides of the blank sheet have passed through a part of the shutter, and the rollers 23, 23'
A part of the blank sheet rises and the A side is in contact with the belt and continues feeding, and the B, C, and D sides of the blank sheet stacked on top of the blank sheet currently being fed are on the roller 23. , 23', and contact with the belt is cut off. FIG. 1(D) shows the state in which side A of the blank sheet has passed through a part of the shutter, and the rollers 23.degree. and 23' have all been raised, resulting in the same state as FIG. 1(A).

In this way, the rollers 23°23' match the paper feeding timing.
By establishing a rising and falling cycle, the occurrence of bending of the blank sheet is completely eliminated.

<Embodiment> An embodiment of the present invention is shown in FIGS. 3 to 7 and will be described in detail.

In the figure, 1 is the frame, 2 is the shutter, and 3
are a pair of side guides. Reference numeral 4 denotes a belt, which is arranged in multiple stages between the driving roller 5 and the driven roller 6.

Reference numeral 7 denotes a drive shaft, which is driven by a drive source (not shown). Reference numeral 8.8' denotes a pair of rotary bodies fixedly attached to the drive shaft 7, and a portion thereof is provided with first transmission levers 9, 9'. Reference numeral 10.10' denotes a second lever which imparts rotational motion to the two-piece cam ILII' in accordance with the rotation of the rotating body 8.8'. The outer periphery of cam ILII' has a convex portion 1
2.12' and recesses 13, 13'. Further, the cam 11.11' has elongated holes 14, 14', and can be fixed at any position on the bosses 17, 17' fixed to the shafts 16, 16' with screws 15, 15'. There is. 18.18' is a cam floor which is biased by springs 19, 19' and is constantly in contact with the outer periphery of the cam 11.11', further imparting movement to the lever 20.20' in accordance with the movement of the cam ILII'. Lever 20.20
' is fixed at one end to the projecting shaft 2], 21'. Thrust shaft 2L21' lever 20.20' and cam floor 19
By ゜19', the uneven portion 12.1 on the outer periphery of the cam ILII'
2'.

13. It performs a constant rocking motion corresponding to 13'.

A plurality of levers 22.2 are provided on the two shafts 21, 21'.
2' can be set at any position. Rollers 23, 23' are provided at the other end of the projecting lever 22, 22', and these rollers 23, 23' come into direct contact with the blank sheet. Incidentally, the projecting shafts 21 and 21' are each independently arranged substantially in the center of the frame 1, and each is supported at one end by a bearing.

In addition, the position of the rollers 23, 23' and the raising and lowering timing are set to be optimal for the dimensions of the blank sheet, so that the lifting lever 22.22' is set on the lifting shaft 21.21', and the cam 11.11' The positions and lengths of the two concave portions 13 and 13' are set in the convex portion on the outer periphery of the convex portion 12, 12', respectively, so that the states shown in FIGS. 1(a) to 1(d) can be independently controlled.

In this embodiment, the levers 9 and 9' are used to transmit power from the drive shaft 7 to the cams 11 and 11', but it is not necessarily necessary to use levers, and a chain sprocket or a gear train may be used. The same effect can be achieved. or,
The same effect can be obtained by applying a certain amount of rocking motion to the thrust shaft 2L21' by a linear drive mechanism such as an air cylinder, a rack and pinion, or a linear motor.

Furthermore, the present invention is that the rollers 23, 23' control contact and non-contact between the blank sheet and the belt.
23' is directly attached to the tip of a linear drive mechanism such as an air cylinder, rack and pinion, or linear motor, and one linear drive mechanism is provided between each belt,
Even if the drive is selected depending on the dimensions of the blank sheet, the same effect as expected by the present invention can be obtained.

<Effects of the Invention> According to the embodiments described above, there is no occurrence of bending of blank sheets during paper feeding, and therefore it is possible to reduce the defective rate, and there is no occurrence of paper jams during the process, and acceleration It is possible to obtain effects such as making it possible to raise the temperature.

[Brief explanation of the drawing]

Figures 1 (a) to (d) are explanatory diagrams of the action of the present invention, Figure 2 is an explanatory diagram of a blank sheet, Figure 3 is a plan view of the present invention, and 4M is an explanatory diagram of the relationship between the rotating body and the transmission lever. , FIG. 5 is an explanatory diagram of the cam portion, FIG. 6 is an explanatory diagram of the cam, and FIG. 7 is an explanatory diagram of the uplift lever. 2 is a shutter, 3 is a side guide, 4 is a belt, 5 is a drive roller, 7 is a drive shaft, 8 and 8' are rotating bodies, 9.9
' is the first transmission lever, 10.10' is the second lever, IL
II' is the cam, 12.12' is the cam outer peripheral convex part, 13.1
3' is the cam outer circumference recess, ]7.17' is the host, 18.18
' is the cam floor, 20.20' is the lever, 21.21'
22.22' is the thrusting shaft, 23.22' is the thrusting lever, and 23°23' is the roller. Figure 1 (a) (b) (c) (d)

Claims (3)

[Claims] (1) In a paper feeding device that is composed of a shutter, a pair of side guides, and a plurality of belts, and that supplies blank sheets by friction between the belt and the blank sheet, the paper feeding timing is determined between the belts. A paper feeding device having at least two or more supports and a support drive device that control the contact or non-contact state between a blank sheet and a belt synchronously with and independently of each other. (2) The support body is fixed at any position on two independent ejection shafts via ejection levers, and these ejection shafts are driven by a cam or a linear drive mechanism such as an air cylinder in synchronization with the paper feeding timing. A sheet feeding device according to claim 1, which is driven. (3) A patent claim in which a plurality of linear drive mechanisms, such as air cylinders, are installed between the belts, a support is provided at the tip of the linear drive mechanism, and the linear drive mechanisms are selectively driven in synchronization with the paper feeding timing. The paper feeding device according to item 1.