JPH0736071B2 - Shifting device in copier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is designed to automatically separate a photosensitive paper sent from a printing device from a superposed paper of an original in a copying machine so that the leading end of the photosensitive paper is relatively fixed. The invention relates to a shift device in a copying machine in which a superposed paper is shifted so as to precede.

[Prior Art] In such a copying machine, a shift roller having a pair of fast-forward rollers and constant-velocity rollers having different peripheral velocities at predetermined intervals is used as a method for relatively displacing the leading edge of the original and the photosensitive paper. Then, a method of supplying superposed paper between the rollers is common (for example, Japanese Utility Model Publication Nos. 55-27869 and 43-16872).
No., etc.). The known shifting device is a fast-forwarding roller arranged in a zigzag pattern as shown in FIGS. 7 to 8 and slightly bited.
The original 52 and the photosensitive paper 53 are sandwiched by the 50 and the constant velocity roller 51, and the photosensitive paper side is fast-forwarded so that the front end of the photosensitive paper precedes the original. The leading edge of the photosensitive paper 53 is sandwiched and abutted against the waiting separation claw 54 and pushed to move it upside down to be sent to the developing section. The original 52 is discharged to the front original exit without being turned over. It is what is done.

[Problems to be Solved by the Invention] However, this conventional device has the following drawbacks.

Since the frictional force is imparted by the biting of the rubber rollers arranged in the staggered shape, it is necessary to obtain a uniform frictional force over the entire length of the shaft, which makes setting the distance between the shifting rollers extremely difficult. The tolerance range of the bite size between the rollers is small and high accuracy is required. That is, if the bite is deep, longitudinal waves are generated on the photosensitive paper and it is difficult to reverse it, and a crisp sound is generated as the paper progresses, and an abnormal frictional force on the roller works to accelerate wear and damage of the Gorocom surface. If the bite is shallow, slipping will occur and the shifting action will be poor. Furthermore, since high precision is required, it takes time and effort to manufacture and assemble, resulting in high cost.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make use of the resilience of the photosensitive paper and the original document to make contact pressure to the shift roller, that is, friction. We provide a shifting device for copying machines that can increase the shifting effect by increasing the force, eliminate the biting of the fast-forwarding roller and the constant-velocity roller, and easily set the distance between the shifting rollers, and make it vertical to the photosensitive paper. It is an object of the present invention to provide a shifting device in a copying machine capable of preventing the generation of waves, accelerating reverse separation, and performing a smooth and smooth shifting action without the refraction of paper. Another object of the present invention is to provide a shifting device for a copying machine of this type, which has a wide tolerance range of accuracy for a rubber roller that constitutes another purpose shifting roller, which is easy to manufacture and assemble and is advantageous in terms of cost.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a shift device of a copying machine according to the present invention is a pair of shift devices in which a photosensitive paper and a superposed paper of an original are rotated in opposite directions and have different peripheral speeds. In a shifter in a copying machine, which is supplied between the rollers and sends the photosensitive paper faster than the original due to the speed difference between the rollers, the pair of shift rollers are provided at a predetermined interval,
Immediately before the gap between the two shift rollers, the superposed paper supplied between the two shift rollers is pressed to the fast-forward roller side of the photosensitive paper shift roller and the original is pressed to the other constant-velocity roller side by its own elasticity. A pressing roller is provided at a position, and the pressing roller rotates at the same speed and in the same direction as one fast-forwarding roller of the shift roller and forms an introduction port for the superposed paper with the other constant-velocity roller of the shift roller. Thus, they are provided at a predetermined interval.

[Embodiment] The printing apparatus 10 comprises a baking cylinder 11 made of translucent glass and a light source 12 built in this cylinder as shown in FIG. When the original 2 and the photosensitive paper 3 are superposedly fed to the belt 13, the printing is performed while closely adhering to the cylindrical body and being fed. Reference numeral 14 is a drive and guide roller for the belt 13.

The separating / shifting device 20 is a roller 21a as shown in FIGS.
And a pair of shift rollers 21.22 that rotate in opposite directions with different peripheral speeds provided at predetermined intervals on rotating shafts 21b.22b that support rollers 22a in parallel, press roller 23, and fast-forwarded photosensitive member. It is composed of a separation claw 24 which holds the front end of the paper and separates it by reversing it, and a guide receiving plate 25 which is introduced between the shift rollers 21.22 while guiding the original and the photosensitive paper so as to form a bypass.

The pair of shift rollers 21.22 may be arranged in a staggered manner with the rollers 21a.22a, or may be provided to face each other as shown in FIGS. Try to separate them. One of the shift rollers 21 is a fast-forward roller and the other 22 is a constant-velocity roller.

The rollers 21a.22a.23a are made of rubber having a large frictional force.

The pressing roller 23 is provided immediately in front of the both shift rollers 21.22. Similar to the shift roller, the pressing roller 23 is provided with rollers 23a at a predetermined interval on a rotary shaft 23b. The press roller 23 rotates at the same speed and in the same direction as the fast-forward roller 21, and the other constant speed roller 22 of the shift roller. Are spaced apart from each other at a required interval S'so as to form the introduction port 26 for the superposed paper 2.3.

The intervals S and S'are usually different depending on the quality of the photosensitive paper.
It is appropriate to set it to about 1 mm. This presser roller 23
As a result, the superposed paper 2.3 fed between the shift rollers 21.22 moves the photosensitive paper 3 to the fast feed roller 21 side and the original 2 moves to the other constant speed roller.
The 22 side is regulated so that it is pressed by its own elasticity.

As a modified example, as shown in FIG. 4, a double presser roller 23.23 is used, and the speeds are the same. Deploy in the same direction rotation.

Further, as shown in FIGS. 5 and 6, a pressing roller 23 with a flange and a rapid feed roller 21 with a flange can be used.

[Operation] The photosensitive paper 3 that has been baked is guided by the guide receiving plate 25 while being superposed on the original 2 and advances along the detour to hold the pressing roller 23.
From the lower side, the front ends of both papers simultaneously contact the constant velocity roller 22.
Since there is a space S'between the constant velocity roller 22 and the pressing roller 23, it reaches the fast feed roller 21 from the introduction port 26 through the space S '. When the superposed paper 2.3 reaches the fast-forward roller 21, the space S is provided between both rollers 21.22.
Due to the presence of the fast-forward roller 21, the polymer paper is
Touch 22. Since there is a space S'between the constant velocity roller 22 and the presser roller 23, the fast feed roller 21 is moved from the introduction port 26 through the space S '.
Reach When the superposed paper 2.3 reaches the fast-forward roller 21, both rollers 2
Since there is a space S between 1.22, rotation of the fast-forward roller 21 pushes the superposed paper toward the constant-velocity roller 22 side, and
It deforms along the circumference of 22. At this time, the photosensitive paper 3 and the original 2
Is repulsive to the above deformation, the photosensitive paper 3 is pressed against the fast feed roller 21 and the pressing roller 23, and the original 2 is pressed against the constant speed roller 22 side. Further, the photosensitive paper 3 applies pressure to the constant velocity roller 22 via the original 2, and the original 2 applies pressure to the fast-forward roller 21 and the pressing roller 23 via the photosensitive paper 3.

When the pressing state is achieved, the photosensitive paper is controlled by the fast-forward roller 21 and the pressing roller, and the original is controlled by the constant-velocity roller 22, respectively, so that the photosensitive paper is relatively displaced, and the photosensitive paper precedes. The leading edge of the photosensitive paper 3 is inserted into the separation claw 24 by the leading of the photosensitive paper 3 and is pushed and reversed as it advances, so that the photosensitive paper 3 is sent to the developing device (not shown) via the guide roller 27, and the original 2 Since the sheet is not turned over, it is discharged as it is to the document outlet (not shown).

EFFECTS OF THE INVENTION The present invention is characterized in that a pair of shift rollers are provided in a state of being separated from each other by a predetermined distance as described above, but the shift is possible.

That is, according to the present invention, as described above, the pair of shift rollers are provided apart from each other, the original side rotates at a constant speed and the photosensitive paper side rotates in different directions by fast-forwarding, and the pressing roller is provided at the position immediately before the both shift-rollers. Since it is provided so as to rotate in the same direction as that of the constant velocity side at a predetermined distance from the constant velocity side and rotate in the opposite direction to form an inlet for the superposed paper together with the constant velocity side roller, It is possible to effectively shift the overlapped paper without staggering each roller of the shift roller or putting them in a pressure contact state, and also to generate a longitudinal wave or a large refraction noise on the photosensitive paper. It can be eliminated, and since longitudinal waves do not occur, it is easy to reverse and shift at the same time, so that separation is performed smoothly and surely, and the distance between the shifting rollers is easy to set, and the allowable range is large, and manufacturing processing is possible. It is easy and cost effective.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a main part of a copying machine embodying the present invention.
FIG. 2 is a partial front view of the shifting device according to the present invention, FIG. 3 is an enlarged vertical side view of the AA line in FIG. 2, and another modification of the shifting device shown in FIGS. 4 and 5. Vertical side view,
FIG. 6 is a front view of the flanged shift roller of FIG. 5,
FIG. 7 is a vertical sectional side view of a conventional example, and FIG. 8 is a front view of the same. 2 ... Original, 3 ... Photosensitive paper 10 ... Printing device, 20 ... Separation and shift device 21 ... Shift roller (fast-forward roller), 22 ... Shift roller (constant speed roller) 23 ... Press roller, 25 ... … Guide receiving plate 33 …… Pressing member

Claims (1)

[Claims] 1. A photosensitive paper and a superposed paper of an original are supplied between a pair of shift rollers which rotate in opposite directions and have different peripheral speeds, and the photosensitive paper is sent out earlier than the original due to the speed difference between the rollers. In a shift device for a copying machine, the pair of shift rollers are provided at a predetermined interval, and
Immediately before the gap between the two shift rollers, the superposed paper supplied between the two shift rollers is pressed to the fast-forward roller side of the photosensitive paper shift roller and the original is pressed to the other constant-velocity roller side by its own elasticity. A pressing roller is provided at a position, and the pressing roller rotates at the same speed and in the same direction as one fast-forwarding roller of the shift roller and forms an introduction port for the superposed paper with the other constant-velocity roller of the shift roller. As described above, the shifting device in the copying machine is characterized in that it is provided at a predetermined interval.