JPS5926328Y2 - Automatic separation devices such as copying machines - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic separation device for separating and processing originals and photosensitive paper in diazo copying machines, etc., and in particular, the originals and photosensitive paper are separated by a pair of rolls with different circumferential speeds. This invention relates to an improvement in an automatic separation device that shifts the

Such an automatic separation device generally inserts the photosensitive paper and the document in a stacked manner between the rolls, with the photosensitive paper being in contact with a roll having a high circumferential speed and the document being in contact with a roll having a slow circumferential speed. The difference in circumferential speed of the rolls causes the photosensitive paper to advance, and a separating member located behind these rolls separates the photosensitive paper from the original.

However, in such an automatic separation device, if the photosensitive paper and the document are of the same size, the trailing edge of the document will be in contact with the rolls on both sides because the photosensitive paper will lead between the rolls. Since the circumferential speeds of both rolls are different, the low speed roll comes into sliding contact with the document surface.

Therefore, when a document is written in pencil, there is a risk that this document will be transferred onto the roll and re-transferred to a subsequent document, thereby staining the document.

The present invention eliminates the drawbacks of the conventional ones mentioned above,
In addition to preventing any shifting action at the rear edge of the original, the photosensitive paper and the original are transported at high speed so that the trailing edge of the original is removed between the photosensitive paper inserted later and the photosensitive paper with the leading edge of the original. This was developed with the aim of providing an automatic separating device for copying machines and other devices that prevents paper from overlapping the rolls, and uses the tension caused by the photosensitive paper being sandwiched between a pair of rolls to allow the low-speed rolls to rotate freely. In addition to preventing the shifting action, the number of rotations of the high-speed roll is reduced when an excessive load is applied to the photosensitive paper.

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 schematically shows an automatic separating device according to the present invention, in which a belt 3 that is run by a roller 2 along the circumferential surface of a cylinder 1 is disposed.

A pick-off member 4 faces the downstream side of the belt 3 in the running direction, and the tip of the pick-off member 4 is in contact with the circumferential surface of the cylinder 1.

A guide member 5 is connected to the rear end of the pickoff member 4, and the photosensitive paper 6 and the original 7 that have been peeled off from the circumferential surface of the cylinder 1 by the pickoff member 4 are guided between the high speed roll 8 and the low speed roll 9. It is designed to perform a shifting action.

These high-speed rolls 8 and low-speed rolls 9 each consist of a plurality of rolls spaced apart from each other in the axial direction, and are disposed so as to be interdigitated with each other.

A configuration for driving the high speed roll 8 and low speed roll 9 is shown in FIG.

In FIG. 2, the support shaft 10 of the high speed roll 8 and the support shaft 11 of the low speed roll 9 are supported by the side plate 12A via bearings 13 and 14, respectively.

Among these, the pressure contact member 1 is attached to the support shaft 10 of the high-speed roll 8.
5 is fitted with a bolt (not shown), and a gear 16 is fitted adjacent to this pressure contact member 15 so as to be able to slide along the support shaft 10.

Therefore, annular cork pieces 17 are placed on both sides of this gear 16.
A and 17B are installed.

Next, a plate 18 serving as a spring seat is fitted in a position adjacent to the gear 16 so as to be able to slide along the support shaft 10. A coil spring 21, one end of which is supported, is pressed against a spring seat 20 that is fitted onto a screw 19 that has been cut in the same direction.

Therefore, the above-mentioned configuration for transmitting rotation to the support shaft 10 forms a slipping clutch, and when a load greater than the spring pressure of the coil spring 21 is applied to the support shaft 10 of the high-speed roll 8, slippage occurs, and the support shaft It will rotate 10.

The driving force is transmitted to the gear 16 by a bearing 2 on the side plate 12A.
Gear 2 fitted to drive shaft 23 supported by Gear 2
4, via a gear 27 which is also supported by an axle 25 on the side plate 12A.

Note that the reason why the rotation is transmitted to the gear 16 via the intermediate gear 27 is because it is necessary to rotate the high speed roll 8 and the low speed roll 9 in mutually opposite directions.

A gear 28 that can mesh with the gear 24 is fitted to the support shaft 11 of the low-speed roll 9 so as to be able to slide along the support shaft 11. A coil spring 30 supported at one end is pressed against the attached spring seat 29, and this gear 28 is stopped at a position where it meshes with the gear 24.

Further, an L-shaped support plate 31 is provided protruding from the side plate 12A, and a pin 32 is implanted in this support plate 31.

This pin 32 is fitted into the long groove 34 of the L-shaped actuation arm 33, and this actuation arm 33 is fitted into the long groove 34 of the L-shaped actuation arm 33.
2 in the axial direction of the support shaft 11.

The tip of the actuating arm 34 faces the side of the gear 28 opposite to the coil spring 30, and when the actuating arm 33 is moved to the left against the spring 30, the gear 2 of the gear 28 is moved.
The meshing with respect to 4 is released.

Further, a solenoid 35 is provided at the other end of the operating arm 33.
A plunger 36 is pivotally mounted.

Note that the timing of energizing and deenergizing this solenoid 35 will be described later.

Returning to FIG. 1, an arm 37 extending horizontally faces the roller 2 and the high-speed roll 8 at an approximately intermediate position, and as shown in FIG.
On the outside of A and 12B, side plates 12A,
A pair of support plates 38A pivotally attached to 12B,
It is attached to 38B.

Therefore, as shown in FIG. 1, when the photosensitive paper 6 becomes tense, the arm 37 swings clockwise, thereby kicking the actuator 40 of the microswitch 39, as shown in FIG.

As shown in FIG. 4, one end of the coil spring 41 is attached to the side plate 12B, and the other end of the coil spring 41 is attached to the support plate 38B. 41 swings to prevent excessive load from being applied to the photosensitive paper 6.

Note that the support plate 38A. A stopper 42 can come into contact with the support plates 38A and 38B.
is designed to prevent it from swinging counterclockwise more than necessary.

When the arm 37 comes into contact with the actuator 40 of the microswitch 39, the solenoid 35 is energized,
The actuation arm 33 is pulled to the left in FIG.
8 is released from its engagement with the gear 24, and the low-speed roll 9 begins to rotate freely. It is necessary to allow the low speed roll 9 to maintain a freely rotating state until the rear end passes between the side rolls 8 and 9.

Therefore, the energizing state of the solenoid 35 is different from that of the arm 3.
7 can be maintained even if the arm 37 is separated from the actuator 40 of the microswitch 39. On the other hand, another solenoid is provided that is energized when the arm 37 is separated from the actuator 40, and the energization of this solenoid is The rotary plate of a known one-turn clutch (not shown) is driven by the rotary plate, and when the rotary plate rotates by a predetermined angle, it contacts the proximity switch and the solenoid 35 is biased. ing.

Note that the solenoid 35 may be controlled by a photosensor (not shown) that directly detects the passage of the photosensitive paper 6, but in this case, the photosensitive paper 6 may be oriented obliquely to the direction of travel. It is necessary to provide multiple photosensors.

Next, the operation of the above-described embodiment will be explained.

The photosensitive paper 6 and the original 7 are transported along the circumferential surface of the cylinder 1 as the belt 3 runs, are peeled off from the circumferential surface of the cylinder 1 by the pickoff member 4, and are guided by the guide member 5, with the leading end being transferred to the high-speed roll 8 and It is sandwiched between low speed rolls 9.

Since the high speed roll 8 and the low speed roll 9 rotate at different circumferential speeds, the photosensitive paper 6 in contact with the high speed roll 8 precedes the document 7 in contact with the low speed roll 9, and a predetermined sliding action is performed.

When a certain amount of sliding occurs in this way, the leading part of the photosensitive paper 6 is held between the side rolls 8 and 9, and the trailing part is held between the cylinder 1 and the belt 3 and becomes tense, causing the arm 37 to move clockwise. Make it sway.

Then, this arm 37 comes into contact with the actuators 40 of the three microswitches, and the solenoid 35 is energized.

This causes the actuation arm 33 to move and disengage the gear 28 from the gear 24 .

Therefore, the low-speed roll 9 is in a state where it can freely rotate, rotates at the same circumferential speed as the high-speed roll 8, and no longer performs any shifting action.

Note that the rotational speed of the high-speed roll 8 at this time is the same as that of the photosensitive paper 6.
is in tension, a large load is applied to the support shaft 10, causing slippage between the gear 16 and the cork pieces 17A, 17B, and the rotation speed becomes slower than normal and equal to the running speed of the belt 3, This substantially matches the normal circumferential speed of the low speed roll 9.

Next, when the rear end of the photosensitive paper 6 is released from being held by the cylinder 1 and the belt 3, the arm 3 moves as shown in FIG.
7 swings counterclockwise due to its own weight, but the solenoid maintains the biased state until the rear end of the document 7 passes between the side rolls 8 and 9, as described above, so that the photosensitive paper 8 and No sliding action occurs at the rear end of the document 9.

Further, the rear end of the photosensitive paper 6 is connected to the cylinder 1 and the bells 1 to 3.
Until the rolls 8 and 9 pass between the side rolls 8 and 9, the load applied to the support shaft 10 disappears, and the gears 24 and 28 are disengaged, causing both rolls 8 and 9 to rotate at high speed. do.

Therefore, the photosensitive paper 6 and the original 7 can be quickly discharged from the pickoff plate 5.

In other words, when the leading edge of the original 7 and the photosensitive paper 6 that are subsequently conveyed by the duplication rollers 8 and 9 are shifted, the speed increases to catch up with the trailing edge of the original 7 that was ejected earlier and separate them. This has the favorable result that there is less chance of insufficient guidance leading to non-separation.

Finally, the photosensitive paper 8 and the original 9, whose leading edges have been shifted, are separated by a separating member (not shown) and sent in different directions for processing.

As described above, the automatic separating device of a copying machine or the like according to the present invention is configured to operate the low-speed rolls aggressively after the leading edge of the photosensitive paper is clamped between the rolls and tensioned, until the trailing edge of the original passes between the rolls. Since the drive is stopped, there is no displacement effect on the trailing edge of the document, so even if it is a pencil document, it will not be transferred to the roll, and the low-speed roll will be driven following the high-speed roll. This allows the ejection speed of photosensitive paper and originals to be increased, so that they do not overlap with the following ones, and furthermore, since the high-speed roll is transmitted with driving force via a spring-based slip clutch,
This has many excellent effects such as eliminating the risk of excessive load being applied to the photosensitive paper under tension.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the automatic separating device according to the present invention, FIG. 2 is a longitudinal cross-sectional view showing a transmission mechanism for driving the rolls shown in FIG. 1, and FIG. 4 is a detailed side view showing the related structure of the arm and switch in FIG. 3; FIG. 5 is a state in which the rear end of the photosensitive paper has come out from being held by the cylinder and belt. This is a diagram similar to FIG. 1...Cylinder, 3...Belt, 6.
...Photosensitive paper, N7...Manuscript, 8...
...High speed roll, 9...Low speed roll, 12 A
, 12 B... Side plate, 15... Pressure contact member, 16... Gear, 17A, 17B...
... Cork piece, 21 ... Coil spring, 24.2
7.28... Gear, 30... Coil spring, 33... Operating arm, 35... Solenoid, 37... Arm, 39・・・・・・Micro switch, 40・・・・・・
actuator.

Claims (1)

[Scope of utility model registration request] In an automatic separation device such as a copying machine, in which a photosensitive paper and an original are sandwiched between a pair of rolls having different circumferential speeds, and the photosensitive paper is placed in front of the original due to the difference in circumferential speed, the original and the photosensitive paper are an arm that is swingably disposed at a position above the rear of the pair of rolls with respect to the traveling direction of the rolls, and swings when the photosensitive paper is clamped between the rolls and tensioned; A solenoid that is energized by the swinging when the roll swings is slidably fitted to the spindle of one of the rolls rotating at a low speed,
A gear that is moved by the energization of the solenoid to disengage from the driving gear, a means for maintaining the energized state of the solenoid until the rear end of the document passes between the rolls, and the other gear that rotates at high speed. An automatic separation device for a copying machine, etc., comprising a spring-based slipping clutch that transmits driving force to the rolls of the machine.