JPH03102039A - Automatic feed device for sheet material - Google Patents

Abstract

PURPOSE:To smoothly separate and feed various sorts of sheet material by forming a transport passage at a slope, and enabling to institute a separating pad at least on two or more positions. CONSTITUTION:A sheet material loading part loaded with sheet material S is fitted on a feeder comprising a feed roller 1 and transport rollers 2a, 2b, further, a separating pad 8 is fitted on a transport passage 5a between the feed roller 1 and the transport rollers 2a, 2b, the sheet material S is fed with the feed roller 1, separated with the separating pad 8, and transported one by one to the transport rollers 2a, 2b. Further, the sheet material S is transported with the transport rollers 2a, 2b. In this case, the transport passage 5a is at a slope, and the separating pad 8 is rearranged at least on two or more positions on the transport passage 5a. Further, the separating pad 8 is moved against the transport passage 5a.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an automatic sheet material feeding device that separates and feeds stacked sheet materials one by one, and specifically relates to an automatic sheet material feeding device having a separation pad. Regarding the sending device. (B) Conventional technology In general, in paper feeding devices for office equipment such as copying machines, a large number of sheet materials such as transfer paper and photosensitive paper are stacked on a sheet material receiving board of a cassette or deck, and the sheets are fed. One sheet from this sheet bundle is fed to the next process using rollers, etc. At this time, in order to prevent double feeding of sheet materials, a friction member, for example, a separation pad made of rubber material containing cork, is provided near the tip of the sheet material in the sheet material feeding direction. contacts this separation pad and performs frictional separation. The relationship between the friction coefficient u1 between the fed sheet materials, the friction coefficient μs between the paper feed roller and the sheet, and the friction coefficient μ2 between the separation pad and the sheet material is μ1 and μ.
It is configured so that 2 × μ3. Due to μ1 < μ2, the conveyance of multiple overlapping sheets is stopped starting from the one closest to the separation pad, and finally due to μ2 and μ3, only one sheet material passes between the feeding roller and the separation pad. It is well known that they are transported. (c) Problems to be Solved by the Invention However, in the above conventional example, the position of the separation pad, which affects the separation performance of the automatic sheet material feeding device, is fixed at the same position. Considering the various cases in which sheet materials are used, it has been impossible to sufficiently separate the sheet materials in all of these cases. For example, if the sheet is folded, wrinkled, warped, etc., or if special sheet materials such as cardboard or envelopes are used, phenomena such as poor paper feeding or double feeding are likely to occur. This had the disadvantage that it was necessary to limit the types of equipment and the environment in which the equipment could be used. Therefore, the present invention has developed a sheet material that allows the attachment position and angle of the separation pad to be adjusted so that the sheet material can be fed even with special sheet materials, deformed sheet materials, and changes in the usage environment. The purpose is to provide automatic feeding equipment. (2) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, as shown in FIG. 1) and conveyance rollers (2a, 2b) disposed downstream of the feed roller (1).
D), a sheet material loading section (5) removably provided on the feeder (D), and the feeding roller (1)
A conveyance path (5a) is provided in the sheet material stacking section (5) between the conveyance rollers (2a, 2b), and the conveyance path (5a)
Sheet material automatic feeding device ( ) equipped with a separation pad (8)
In B), the transport path (5a) is formed to be inclined, and the separation pad (8) is configured to be set at at least two or more positions. Further, the separation pad (8) is disposed so as to be movable in the conveyance direction of the sheet material (S). Further, the separation pad (8) is arranged such that two or more inclination angles with respect to the conveyance direction of the sheet material (S) can be set. Further, the separation pad (8) is removably disposed on the conveyance path (5a) of the sheet material (S). Further, separation claws (7a, 7b) having passage gaps for the sheet material (S) are provided on both sides of the downstream end of the sheet material loading section (5).
is provided so that the sheet material (S) passing through the passage gap reaches the separation pad (8). (f) Based on the structure described above, the feeding roller (1) and the conveying roller (
2a, 2b) and the sheet material (
A sheet material loading section (5) loaded with S) is attached, and a separation pad (8) is attached to the conveyance path (5a) between the feed roller (1) and the conveyance rollers (2a, 2b), The sheet material (S) is fed by a feeding roller (1), separated by a separation pad (8), and transferred one by one to a feeding roller (2).
a, 2b), and then the conveyance rollers (2a, 2b)
The sheet material (S) is conveyed by. At this time, the conveyance path (5a) is inclined, and the separation pads (8) are arranged in at least two or more positions on the conveyance path (5a). Further, the separation pad (8) is moved relative to the conveyance path (5a). Further, the inclination angle of the separation pad (8) is adjusted to the inclination angle of the separation pad (8).
Change two or more settings for a). Further, the separation pad (8) may be attached to the conveyance path (5a),
Remove it. Further, when the sheet (S) is fed by the feeding roller, separation claws (7 a, 7
It passes through the gap b) and reaches the separation pad (8). (F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. In FIG. 1, an automatic feeding device B is placed on a stand C, and a printer A is fitted and locked onto this automatic feeding device B. Further, a feeding roller 1 is provided in the middle of the upper part of the automatic feeding device B, and a pair of conveying rollers 2a. 2b is provided to form a feeder D, and a bin 3a is fixedly installed at the bottom.
An L-shaped pressure lever 3 is pivotally supported on the pressure lever 3.
is biased clockwise by tension spring 4. Further, a cassette 5 marked with diagonal lines is detachably attached to the automatic feeding device B, a middle plate 6 is attached to this cassette 5 with the left side 6a as a fulcrum, and the pressure lever 3 is used to rotate the cassette 5 about the fulcrum 6a. A sheet material S is placed on this intermediate plate 6, which is biased counterclockwise. Also, the claw 7a against which the upper surface of the right end of the sheet material S is pressed
and a claw 7b against which the right end surface of the bundle of sheet materials S is pressed are provided in the cassette 5, and the sheet materials S are held between these 7a and 7b.
It is designed to be transported to the right between the A separation pad 8 is attached to the cassette 5 between the claw 7b and the transport rollers 2a, 2b.

Also, the relative positions of the claws 7a, 7b, feeding roller 1, separation pad 8, conveyance roller 2a +' 2b, etc. are shown in Figure 2 (
Shown in a) (b) (c). Three grooves 9a, 9b, 9 are formed in the inclined front wall 5a of the cassette 5.
c are arranged in steps from the bottom in this order, and these clear 9a and 9b
, 9c, guides 10 are provided on both sides of the separation pad 8 as shown in FIG. 8a is adapted to be locked in the grooves 9a, 9b, and 9c. Incidentally, the separation pad 8 may be configured to be removably removable. Since this embodiment is configured as described above, when the feeding roller 1 rotates, the sheet material S is fed in the direction of the arrow E. When the second sheet material S is taken out along with the uppermost sheet material S, the sheet material S is driven by the feeding roller 1 having a larger coefficient of friction than the separation pad 8. so go over the separation pad 8 and
As shown in FIG. 2(C), the sheet material S. is driven by the coefficient of friction between the sheet material S I, S snow which is smaller than the separation pad 8, so it is stopped by the friction with the separation pad 8.
That is, only the uppermost sheet material SL is separated and conveyed to the conveyance rollers 2a, 2b, and further conveyed to the printer A by the conveyance rollers 2a, 2b. At this time, when using a thin sheet material S that is likely to cause double feeding, set the separation pad 8 at the position (c) where the amount of overlapping is large, and it will be difficult to go over the separation pad 8, resulting in feeding failure. When using the sheet material S that causes the separation pad 8 to be used, the separation pad 8 is set at the position (A) where the amount of overlapping is small.

Further, when the sheet material S becomes less in the cassette 5, it is moved upward by the intermediate plate 6 and the upper surface of the sheet material S is maintained at a substantially constant level by the claw 7a, thereby stabilizing the separation and feeding of the sheet material S at all times. Next, another example is shown in FIG. 4(a). This will be explained with reference to (b). A separation pad 8 is pivotally supported on the front wall 5a of the cassette 5 by a shaft 11, and is driven by a cam 13 rotating about the shaft 12, so that the separation pad 8 tilts against the bias of a tension spring 15. It looks like this. Further, a dial 14 is attached to the shaft 12 of the cam 13, and a groove 14a of the dial 14 is attached to the shaft 12 of the cam 13.
is adapted to be locked by an elastic protrusion 17 provided on the main body 16 of the automatic feeding device, so that the angle of the separation pad 8 can be set in multiple stages. Thus, by changing the angle of the separation pad 8, the resistance with which the sheet material S passes over this separation pad 8 is changed. When using a thin sheet material S that is likely to cause double feeding, the inclination angle is increased to increase the resistance and prevent double feeding. Furthermore, when using a sheet material S that is difficult to get over the separation pad 8 and is likely to cause paper feeding failures, the inclination angle is made small to reduce resistance. Next, still another embodiment will be described with reference to FIG. (a). Due to the positions of (A) and (C), the slope of the surface on which the separation pad 8 is set is larger (B) than in (A) and (C) than in (B). That is, when using the sheet material S that is difficult to get over the separation pad 8 and is likely to cause paper feeding defects, shift to the position (A), and when using the sheet material S that is thin and prone to double feeding, By shifting to the position (c) and using it, the range of separation conditions for the sheet material S can be widened.

Note that by moving the separation pad 8 shown in FIG. 4, the crossing angle can be changed independently of the crossing amount. Next, another embodiment will be described with reference to the sixth embodiment.

This embodiment is an automatic feeding device in which a feeding roller 1 and a separation pad 8 are in pressure contact with each other.

A stand 18 is rotatably suspended from the shaft 1a of the feed roller 1, and a separation pad 8 is placed on this stand 18 via a compression spring 20, and the separation pad 8 is attached to the feed roller 1.
It is pressed against. Further, a locking pin 19 is fixedly provided, and engagement grooves 18a and 18b are provided on the bottom surface of the stand 18, so that the locking pin 19 is engaged with the engagement groove 18a or 18b. There is.

In this way, when the locking bottle l9 is locked in the engagement groove 18b, the angle at which the sheet material S enters the separation pad 8 is small;
When the locking pin 19 engages with the engagement groove 18a, the angle at which the sheet material S enters the separation pad 8 is large. When using a thin sheet material that is likely to cause double feeding, the angle of entry into the separation pad 8 is increased, and when using a thick sheet material S that is likely to cause paper feeding failures, the entry angle is made smaller. In this way, the problems that occur with thick and thin sheet materials S can be solved. (g) Effects of the invention As explained above, according to the present invention, the separation pad (8
〉 can be arranged in two or more positions with respect to the inclined conveyance path (5a), so the amount by which the sheet material (S) crosses over the separation pad (8〉) can be changed.
For thick sheet materials (S), such as postcards, etc., which are difficult to cross over and are prone to feeding defects, the overpass amount is reduced, and for thin sheet materials (S), which are prone to separation defects, the overflow amount is reduced. By increasing the size, various sheet materials (S
) can be smoothly separated and fed. Also, for items that are folded like envelopes and have different bulges depending on the environment in which they are used, the amount that the separation pad (8) can exceed should be determined according to the environment as described above! Since it can be adjusted as described above, it can be separated and fed smoothly as described above. Furthermore, since the structure for rearranging the separation pads (8) is simple, manufacturing costs can be reduced. Furthermore, by changing the setting of the inclination angle of the separation pad (8) to two or more, the conveyance resistance of the sheet material (S) in the conveyance path (5a) can be reduced by the entry angle of the sheet material (S). The conveyance speed of the sheet material (S) is stabilized by varying the surface condition of the sheet material (S) or the separation pad (8), and the thickness of the sheet material (S).
Coupled with the adjustment of the amount exceeding 8), the sheet material (S) can be smoothly separated and fed.

In addition, in some cases where the separation pad (8) can be installed and removed, the separation pad (8) whose frictional resistance has decreased due to wear and separation ability has decreased can be reused by installing it in a position that compensates for the situation. In addition, by feeding the sheet material (S) toward the separation pad (8) through the gap between the separation claws (7a, 7b), the life of the separation pad (8) can be extended. , the performance with which the sheet material (S) is fed and separated can be significantly stabilized.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an embodiment of the present invention, Fig. 2 is an explanatory view showing a feeding and separation state, Fig. 3 is a perspective view of a separation pad, and Fig. 4(a) shows another embodiment. 4(b) is a perspective view thereof, FIG. 5 is an explanatory view showing a separated state of another embodiment, and FIG. 6 is a longitudinal side view showing another embodiment. 1... Feeding rollers 2a, 2b... Conveying rollers 5... Sheet material loading section (cassette) 5
a... Conveyance path (front wall) 7a, 7b... Separation claws (claws) 8... Separation pad B... Sheet material automatic feeding device D... Feeder S... Sheet material

Claims (1)

[Claims] 1. A feeder having a feeding roller that feeds sheet material and a conveying roller disposed downstream of the feeding roller, and a sheet material loading section that is detachably attached to the feeder. and,
In the sheet material automatic feeding device, the sheet material automatic feeding device is provided with a conveyance path between the feed roller and the conveyance roller in the sheet material stacking section, and further provided with a separation pad in the conveyance path, wherein the conveyance path is inclined. What is claimed is: 1. An automatic sheet material feeding device characterized in that the separation pad is configured to be set at at least two positions. 2. The automatic sheet material feeding device according to claim 1, wherein the separation pad is movably arranged in the conveying direction of the sheet material. 3. The automatic sheet material feeding apparatus according to claim 1, wherein the separation pad is arranged such that two or more inclinations with respect to the conveying direction of the sheet material can be set. 4. The automatic sheet material feeding device according to claim 1, wherein the separation pad is removably disposed on the conveyance path of the sheet material. 5. The sheet according to claim 1, wherein separation claws having a passage gap for the sheet material are provided on both sides of the downstream end of the sheet material loading section, so that the sheet material that has passed through the passage gap reaches the separation pad. Material automatic feeding device.