JPS5847743A - Rewinding device of rolled material - Google Patents

Abstract

PURPOSE:To realize the automatic rewinding with no slackening by a method wherein a plurality of supporting shafts, onto which rolls are set, and rollers, which are interlocked with a motor in order to forward rolled material, and turned to be interlocked with one another only when the rolled material is rewound in an automatic copier or a camera. CONSTITUTION:The rolls 1 and 2 are set onto respective supporting shafts 5.... When the roll 1 is used, firstly, the leader part 1' of the roll 1 is pinched between upper feed rollers 10 and 10' by rocking a nip lever 27 and secondly, a motor 15 is put into operation to drive the rollers 10 and 10' in order to forward the rolled material in the roll 1 and at the same time exposure operations are performed in succession. When the roll 2 is used, firstly, the motor 15 is put into reverse operation and the reverse operation of the motor 15 causes a one-way clutch 12 to turn ON and consequently the supporting shafts 5 and 5 to turn in reverse direction through gears 11 and 9 and as well as a lower one-way clutch 17 to release. In this case, because the feeding speed of the roller 10 is rendered to be a little bit slower than the rewinding speed of the supporting shafts 5 and 5, the rolled material is rewound under tension until the cut tip made by a cutter 22 attains to the location indicated with a limit switch 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for feeding and rewinding a roll material such as a photosensitive material loaded into a copying machine or a camera. In a copying machine loaded with two or more types of paper, if you need to stop copying the roll paper in use and use another roll paper of a different size, you must rewind the previous roll paper into the magazine. No. One method of unwinding is to reverse the center axis of the roll paper using a manual handle, but this method requires a sensor for a warning device such as a buzzer to prevent over-rolling during unwinding. , and the operation was time-consuming. Another known method is to automatically rotate the roll paper in the opposite direction.
Since it is necessary to unwind the roll paper while always applying a constant tension to it, the rotational speed of the winding must be changed, and a slip mechanism must be interposed in the rotation transmission mechanism. Ta. Therefore, there was a drawback that the device was expensive.

Therefore, the present invention was devised to eliminate these conventional drawbacks, and provides an inexpensive and easy-to-load roll material. To explain the present invention in detail, Figure 1 shows part of a large copying machine, which is shown in cross-section. Roll papers 1 and 2 wound up in magazines of different sizes are placed horizontally in a frame A and loaded. are doing. FIG. 2 is a perspective view showing only the essential parts of FIG. 1, and the following description will be made based on this diagram. First, regarding the roll paper 1, the plungers 4, 4 provided at both ends of the roll paper 1 are replaced by two bearing shafts 5, 5 parallel to the axis of the roll paper 1. It is placed in the groove 6 of. A rewinding sprocket 7.7 is wedged to the end of the bearing shaft 5.5, and a check 78 is suspended between both tin rockets 797. A rewinding gear 9 is wedged on one of the bearing shafts 5, 5.
The gear 9 meshes with a gear 11 equipped with a one-way clutch 12 provided at one end of the upper feed roller 1o. Zero or even number of idle gears are interposed between the gears 9 and 11. Bearing shaft 5 and upper feed row 21
0 and a gear ratio so that the receiving shaft rotates slightly more than the amount of rewinding. At the other end of the upper feed row 210, a sprocket 13 and an electromagnetic clutch 14 are arranged in parallel, and the sprocket 13 has a
It is driven by the controller 15 via the controller 716. The Che 7
Another sprocket 18 with a built-in one-way clutch 17 is also hung on sprocket 16.
8, the lower feed row 219 is driven. Above mentioned top feed
The reroller 10 and the lower feed roller 19 are paired with nip rollers 10'*19' facing each other, and grip the paper 1' and feed it. Between the upper and lower feed rollers 1 (Li 2), two facing plate glasses 21 and 21' are stood upright. A cutter 22 is provided directly below them. A predetermined light is applied to the plate glasses 21. Light is projected and exposure B is performed.

Next, returning to FIG. 1, this copying machine is loaded with roll papers 1 and 2 of different sizes as described above, and roll paper 2 is also attached to roll paper 1. The two bearing shafts, their grooves, rewinding sprocket, check 7, pair of upper feed rollers, gears, etc. are attached in exactly the same way. In other words, roll paper 1 and 2 are manually inserted into each bearing shaft 5.
, 5... is placed on top. When using roll paper 1, the nip lever 27 (see Figure 1) is rotated to widen the space between the upper feed rollers 10 and 10', and during this time the end (part of the leader) of paper 1'' is moved as will be described later. Push the upper limit switch 24 all the way to the upper limit switch 24, rotate it based on the nip lever 27, and clamp it.Next, turn on the motor 15, and in the case of the upper limit switch 24, the electromagnetic switch 14 is in the upper position. When rotation is given to 910.19, paper 1
1, and the paper l' is fed to the plate glass 21.
21', it is extended to the lower limit switch 29. The copy machine is now ready.

Next, a predetermined exposure copying operation is performed one after another, and after each exposure is completed, the electromagnetic clutch 14 is engaged, that is, the rotation of the motor 15 is transmitted to the upper feed roller 10, and the paper is transferred to the upper feed roller 10. 11 will be discharged. After the paper 11 has been discharged to an appropriate length to be exposed, the paper 11 is cut with a cutter 22.

In this way, when the motor 15 rotates forward, the one-way clutch 12 is disengaged, and the motor 1 is connected to the bearing shafts 5, 5.
The rotation of 5 is not transmitted, and the roll paper 1 on the bearing shafts 5, 5
is in a free state, and uses the weight of the roll paper 1 to provide frictional resistance to rotation, thereby preventing the paper 11 from sagging when being pulled out.

Furthermore, if it becomes necessary to use the roll papers 1 and 2 alternately, for example, the part of the roll paper 1 between the sheet glasses 21, 21' that is being used can be rewound towards the magazine - instead The roll paper 2 is sent out, but for this rewinding, the motor 15 is reversed (in this case, the electromagnetic clutch 14 is turned on), the upper feed row 210 is reversed, and the one-way clutch 12 is turned on. As a result, the gears 11 and 9 rotate, causing the bearing shaft 5 to rotate.

Since the one-way clutch 17 is in the disengaged state, the rotation of the motor 15 is not transmitted to the lower feed roller 19. At this time, the speed at which the paper 11 is fed by the upper feed roller 10 is
The ratio of the gears 9, 11 is selected so as to increase the speed at which the paper 1' is wound up by the rotation of both bearing shafts 5, 5. In other words, the receiving shaft 5 is slightly larger than the actual amount of rewinding.
, 5 rotate, the paper 11 is always kept under tension and is wound into the magazine until the cut end of the paper 11 comes to the position of the upper limit switch 24. Since the ratio of this gear 9911 is always constant, even if the winding speed gradually increases depending on the amount of paper lI wound into the magazine, the roll paper 1 is simply placed on the bearing shaft 5y5. Since there is as much space as possible, slippage occurs between the flange 4t4 and the groove 6, and the winding operation is always performed smoothly.

Here, the roll paper used in the present invention has a size of about 3QQmm in width, for example. Therefore, the resistance due to its own weight can be effectively utilized for the rotation of the paper 11 when feeding it out, and the drive and slip can be effectively used when the paper 11 is being rewound.

Note that when the paper 11 is finished, the elongated hole 25 provided near the end of the paper 11 passes over the detection lever 23 which is always biased toward the paper 11 side.
protrudes into the elongated hole 25, the limit switch 24 with the detection lever 23 as a tentacle is activated, and the end of the paper 11 is displayed on the operation panel (not shown), and the motor 15 continues to rotate in the forward direction. The remaining unused vapor 1' is all transported to the next process of the copying machine, for example, a developing process.

In summary, the configuration of the present invention is such that a magazine for winding roll-wound photosensitive materials, materials, etc. is simply placed on a plurality of bearing shafts, and a feed roller is connected to the bearing shafts and a motor that feeds the roll-wound material. Since this is a roll-wound material rewinding device that operates in conjunction only when the roll-wound material is unwinded, the following effects are achieved.

■ Even if the unwinding operation of the rolled material is automatically performed by a motor and the interlocking speed of each part due to Tanabata is constant, problems may occur due to changes in the unwinding speed due to the size of the roll, i.e. Furthermore, it is possible to prevent the material from sagging and strong tension/johns.

■ To absorb changes in rewinding speed due to the thickness of the winding, simply place the magazine on multiple bearing shafts, and the mechanism is extremely effective, as it is achieved by slipping between the magazine and the bearing shafts. It becomes simple and the device can be made inexpensive.

■ Loading the magazine into the device is simply a matter of placing it on the device, so even large rolled materials can be loaded very easily. ■ When feeding the rolled material, the motor does not act on the bearing shaft. The roll paper's own weight creates tension between the feed roller and the magazine, preventing the material from sagging.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a copying machine according to an embodiment of the present invention, and FIG. 2 is a perspective view of FIG. 1. 1 River Roll paper 5.5... Bearing shaft 10.19... Feed roller 15... Motor agent Patent attorney Yoshihiko Okabe

Claims (1)

[Claims] (1) A magazine with rolled material wound thereon is placed on a plurality of bearing shafts, and the bearing shafts and a feed roller interlocked with a motor for feeding the rolled material are connected to each other for rolling the roll material. A rewinding device for rolled material that operates only when rewinding the material. (2) Claim 1 in which the feed roller is provided with a one-way clutch that is disconnected during feeding and engaged during rewinding.
A device for unwinding a rolled material as described in 2. (31) The bearing shaft and the feed roller 2 are connected by a gear, and zero or an even number of gears are interposed between the gear of the bearing shaft and the gear of the feed roller. (4) The rewinding device for roll-wound material according to claim 1, 2, or 3, wherein the receiving shaft is provided with a groove in which the flange of the magazine is inserted. .