JPS6054672B2 - Copy machine document loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document loading device for a copying machine, and more particularly to a document loading frame mechanism for a moving document copying machine.

In a moving original copying machine, as the copying speed increases, and in a moving original copying machine having an enlargement/reduction function, as the reduction ratio increases, the moving speed of the original in the exposure section increases.

For this reason, the speed at the document loading section will inevitably increase, but this will make it difficult to load the document in the correct direction (that is, parallel to the document conveyance belt), and the copied image will not appear on the recording paper. This causes defects such as tilting and rubbing. As a countermeasure to this problem, a document loading device has been proposed in which the loading speed of the document in the document loading section, which is conventionally operated manually, is slow, and the document is transported at a predetermined high speed after the document is completely loaded. ing. The outline of such a document loading device will be explained with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a feed roll that constitutes a low-speed loading device that, together with an idler roll 3 facing the opposite one, holds a document (shown in the figure) at a slow speed. Reference numeral 2 denotes a document placed thereon in cooperation with idler rolls 3A and 3B. 4 is a platen that defines the position of the document in the exposure section; 5 is an exposure lamp that illuminates the document on the platen 4; 6 is a drive source that drives the belt 2; 8 is an exposure optical path, 8 is a photosensitive drum disposed on the exposure optical path, 9 is a pulley attached to the holding roll shaft 2A of the belt 2, and 10 is between the pulley 9A attached to the axis IA of the feed roll 1 and the pulley 9. 11 is an electromagnetic clutch that controls the drive of the pulley 9A, 12 is a pulley with a one-way bearing attached to the shaft IA, and 13 is a belt that connects the pulley 2 and the drive source 14.

Figure 3 is a block diagram showing the exposure of the control circuit.
F is a flip-flop that is set by the document detection signal DS and reset by the recording paper trailing edge detection signal TS, and CD is energized by the Q output of the lower F of the flip-flop to operate the electromagnetic clutch 11. This is the clutch drive circuit.

The document detection signal DS is obtained, for example, by a microswitch placed between the feed roll 1 and the belt 2, and the recording paper trailing edge detection signal DS is obtained by a microswitch placed along the roll paper conveyance path. etc. can be obtained by In addition,
The signal L may be generated not only by detecting the trailing edge of the recording paper but also by detecting the trailing edge of the document that has been carried in and, if necessary, generated after a certain period of time. Before loading the original, the belt 2 is driven by the drive source 6 in the direction of arrow A at a predetermined speed commensurate with the copying speed, while the feed roll 1 is moved from the drive source 14 via the belt 13, pulley 12 and shaft 1A. It rotates as shown by the arrow at a slower speed than belt 2.

On the other hand, flip-flop FF is in a reset state and the electromagnetic clutch is not operated. Therefore, when a user loads a document, the document should be loosely caught between the feed roll 1 and the idler roll 3, which rotate at low speed, and the document should be oriented correctly and parallel to the roller axis. When the document is corrected by hand and released when the document is in the correct position, the document is fully caught and carried toward the belt 2. Therefore, insertion errors such as tilting or protruding images on the recording paper are prevented. When the leading edge of the original reaches the belt 2, it is transported to the exposure section at a predetermined speed by the belt 2 and the idler roll 3A. FF is set. Since the electromagnetic clutch 11 is energized by the Q output, the feed roll 1 comes to rotate at the same circumferential speed as the belt 2, and the document is transported without any problem. be done. When the trailing edge of the document passes the feed roll 1, the trailing edge of the recording roll paper cut to the predetermined size is detected by appropriate means, and a signal TS is supplied to the flip-flop FF, so that the FF is reset. Ru. This deenergizes the electromagnetic clutch 11. The rotation of the feed roll 1 is then restored to the initial low speed in preparation for loading the next document. As described above, even if the copying speed increases, the original moving speed at the time of original insertion is kept constant and relatively low, so the original insertion work becomes easier and insertion errors are reduced.

However, depending on the type and size of the originals, there may be cases where it is desired to copy a plurality of originals onto a single sheet of recording paper, and in such cases, the originals must be inserted one after another in succession. However, because the traveling speed of the documents at the time of loading is slower than the traveling speed after loading is complete, gaps occur between the documents at the exposure position even if the documents are consecutively inserted, resulting in blank areas between the copied images. Become. As a result, recording paper is wasted, originals of a size that could be copied onto one sheet of recording paper if there were no margins cannot be copied onto one sheet, and furthermore, continuous copies of images from a copied original cannot be copied onto one sheet. This method has the drawback that it cannot be used for applications where the printing method requires a large amount of data, and also has the drawback that the copying process takes a long time. The present invention eliminates the above-mentioned drawbacks by providing a mechanism for appropriately switching the document carrying speed in the document carrying section so as to be equal to the feeding speed of the document conveying belt as necessary.

For this reason, in the present invention, a continuous copy selection button is provided, and the operation of the continuous copy selection button prohibits the operation of the roll paper cutter.

That is, since the roll paper cutter does not operate when the selection button is operated, the trailing edge detection signal TS is not generated even if the roll paper is fed out to the planned size, and therefore the flip-flop FF is not reset. , the electromagnetic clutch 11 continues to be biased. Therefore, the feed roll 1 continues to rotate at the same circumferential speed as the belt 2, and two or more documents can be successively loaded one after another. After loading the last document, by restoring the selection button, the state returns to the normal copying state, the roll paper is cut, and the flip-flop FF is reset by the recording roll paper trailing edge detection signal TS. be done. As a result, the bias of the electromagnetic clutch 11 is released, and the feed roll 1 returns to low speed rotation. As described above, according to the present invention, two or more originals are loaded consecutively and without any gaps on the recording paper,
Since it can be copied, it can be applied to a wide variety of uses, and the copying efficiency can be increased.

In addition, in the above, the detection of the trailing edge of the loaded document can be used as the signal TS for restoring the electromagnetic clutch 11, that is, resetting the lower flip-flop F, and if necessary, the signal can be generated after a scheduled time. should be obvious.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the document loading device, FIG. 2 is a partial plan view taken along line A--A in FIG. 1, and FIG. 3 is a block diagram showing an example of an electromagnetic clutch control circuit. 1111 feed rylonil, 211● belt, 393A93B
...Idler roll, 4...Platen, 6,14...Drive source, 10,13...Belt, 11...Electromagnetic clutch.

Claims (1)

[Claims] 1. A document conveyance device that conveys a loaded document at a predetermined speed; a low-speed carry-in device that is disposed upstream of the document conveyance device and is driven at a speed slower than the predetermined speed to sandwich the document; a document detection means disposed between the conveyance device and the low-speed import device; a roll paper cutter and a recording paper trailing edge detection means disposed along the roll paper conveyance path;
The low-speed loading device is driven at the same speed as the document conveying device in response to the generation of the detection signal from the document detection means, and is driven at the same speed as the document conveyance device in response to the generation of the detection signal from the recording paper trailing edge detection means. According to another aspect of the present invention, there is provided a document loading device for a copying machine equipped with a low-speed loading device driving means for driving at a slow speed, further comprising means for selectively inhibiting operation of the roll paper cutter. Document loading device.