JPH04121349A - Rewinding roller and picture recorder using it - Google Patents

Abstract

PURPOSE:To easily perform fixing and releasing a point end of a rewound material by providing a cam in a rewinding roller. CONSTITUTION:When a rewound material is conveyed to come into a slit opening, a cam 10c is rotated to interpose the rewound material by the first arm brought into contact with an internal diameter part in a range of predetermined angle, and a point end part of the rewound material is fixed to a rewinding roller 10. A cam rotational device is left as continued to rotate, but when the first arm is brought into contact, also cylindrical units (10a, 10b) are rotated at a rotational speed a little slower than the cam to rewind the rewound material to an external surface of the cylindrical unit. The cam rotational device tends to rotate faster than a cylindrical unit rotational device, but the device is slipped when torque is increased to a predetermined value or more, so that the cam rotational device is rotated at a rotational speed equal to the cylindrical unit rotational device while bringing the first arm into contact. Next, the rewound material on the cylindrical unit is wound back at winding back time, and when the cam is rotated a little in a winding back direction when rotation of the cylindrical unit is finally stopped, the first arm is separated from the internal diameter part of the predetermined angle range with which the first arm is brought into contact.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a winding roller with which the winding end of a winding object can be easily attached and detached, and an image recording apparatus using the same.

BACKGROUND ART When obtaining a multicolor image, a developer for each color is used, and latent image and development are repeated for each color. In this case, the recording paper is wound and rewound a number of times according to the number of colors (for example, three times in the case of four-color printing), and when the development of the last color is completed, it is sent to a cutter and undergoes processing such as cutting. , and is guided to a conveyance path different from that of the take-up roller.

Such an image recording apparatus is disclosed in Japanese Patent Application Laid-Open No. 62-269851.

Problems to be Solved by the Invention According to the above publication, a cylindrical guide plate is provided around the roller as a winding roller to guide the incoming recording paper, and a winding guide plate is provided to press the leading edge of the recording paper. A diagram of how to wind it up is shown, but there is no explanation of how to hold the tip. Further, in such a winding roller, if the recording paper enters the recording paper at an angle, it will be rolled up as it is, resulting in wrinkles and creases in the recording paper.

The present invention has been made in view of the above-mentioned problems.The present invention securely grips and winds the tip of the object to be wound, releases it when unwinding, and prevents the object from entering the object diagonally. An object of the present invention is to provide a take-up roller that can be straightened and taken up, and an image recording device using the same.

Means for Solving the Problems In order to achieve the above object, a cam for gripping the object to be wound is provided inside the winding roller, and the rotation of the cam and the winding cylinder is controlled. The take-off roller includes a hollow cylindrical body having a slit opening in the axial direction and an inner diameter in a predetermined angular range from one end of the slit opening is smaller than that in other angular ranges, and a hollow cylindrical body provided coaxially within the cylindrical body. A first arm disposed on the rotation axis and smaller in inner diameter than the other angle range and larger than the inner diameter in the predetermined angle range, and when abutting against the inner diameter in the predetermined angle range, the first arm closes the slit opening. The second
a cam having an arm; a cam rotating device that rotationally drives the rotating shaft and slips when the torque exceeds a predetermined torque; and a cylindrical body rotating device that rotationally drives the cylindrical body and slips when the torque exceeds the predetermined torque. It is something that

Further, the cam is provided at both ends and the center of the rotating shaft, and the friction force between the first arm of the cam at the center and the inner diameter portion in the predetermined angle range that comes into contact with the first arm is transferred to the first arm at both ends. This is greater than the similar frictional force on the arm. The cams are provided at both ends and the center of the rotating shaft, and the first arm of the cam at the center is connected to the first arm of the cam at both ends.
It is attached to the rotating shaft so as to have a phase angle that is more advanced in the winding rotation direction than the arm. Also,
The image recording apparatus of the present invention includes a recording section that repeatedly forms a latent image of each desired color and this development on a recording medium to form an image, and a conveyance roller that is provided downstream of the recording section and that conveys the recording medium. , a first rotation center provided on the conveying roller side, and a first rotation center provided on the other end with this first rotation center as one end of the guide surface.
A first guide portion having a contact surface, a second rotation center provided below the guide surface and having a second contact surface rotating in contact with the first contact surface within a predetermined rotation angle range at one end of the guide surface. The second guide part that rotates around this @2. A hollow cylindrical body provided downstream of the guide part and having a slit opening in the axial direction and having an inner diameter smaller in a predetermined angular range from one end of the slit opening than in other angular ranges; When the first arm is disposed on a rotary shaft provided and has an inner diameter smaller than the inner diameter of the other angular range (larger than the inner diameter of the predetermined angular range) and comes into contact with the inner diameter of the predetermined angular range, the first arm a cam having a second arm arranged so as not to block the slit opening; a cam rotating device that rotationally drives the rotating shaft and slips when the torque exceeds a predetermined torque;
The winding roller includes a cylindrical body rotation device that rotationally drives the cylindrical body and slips at a torque greater than the predetermined torque, and a cutter section provided downstream of the first guide section.

Effect With the above configuration, the winding roller is in a state in which the first arm does not close the slit opening when the second arm abuts the inner diameter portion of the hollow cylindrical body within a predetermined angle range.

Therefore, the cam rotation device and the cylindrical body rotation device are set so that this state is the winding start state. When the object to be wound is conveyed, it enters this slit opening. Then, the cam rotates, and the first arm comes into contact with the inner diameter part of the object to be wound up within a predetermined angle range, thereby fixing the tip of the object to be wound up to the winding roller. The cam rotating device continues to rotate, but when the first arm comes into contact with it, the cylindrical body also rotates at a slightly slower rotational speed than the cam, winding up the object to be wound onto the outer surface of the cylindrical body. , tries to rotate faster than the cylindrical body rotating device, but if the torque exceeds a predetermined value, it will slip, so it rotates at the same rotation speed as the cylindrical body rotating device while keeping the first arm in contact with it.Next, when rewinding, the cylinder When the object to be wound on the body is unwound and the rotation of the cylindrical body is finally stopped, if the cam is slightly rotated in the unwinding direction, it will move away from the inner diameter part of the predetermined angle range that the first arm is in contact with. , release the fixation of the tip of the object to be wound.

When the object to be wound up obliquely enters the winding roller, the object to be wound up is fixed to the cylindrical body by the first arms at the center and both ends, and the cylindrical body begins to rotate.

In order to apply tension to the object to be wound up, the cylindrical body rotating device rotates at a higher rotational speed than the conveyance roller that feeds the object to be wound up, and generates tension while slipping. At this time, the frictional force between the first arm at the center and the cylindrical body that is in contact with it is greater than the frictional force between the parts that are in contact with the first arms at both ends. A tension force is applied between the two and the object to be wound, which has entered at an angle, is straightened.

In addition, the first arm of the center cam is set to have a phase angle that is more advanced in the winding direction than the first arms of the cams at both ends (if the object to be wound comes in diagonally, the first arm of the center cam The first arm of the cam fixes the body to be wound up and generates tension in the body to be wound up, thereby straightening the body to be wound up at an angle.

Next, the operation of the image recording apparatus using this winding roller will be explained.

The recording unit generates latent images and develops them by the number n of desired colors, but at this time, the conveyance roller reciprocates the recording medium n-1 times one less time than the number of desired colors. Accordingly, the take-up roller is n-
Winding and unwinding are performed once, and at the nth time, the completed image is branched to the cutter section by the first guide section and sent out. In this way, during the first n1 reciprocating movements, the film is wound up and rewound by the winding roller via the first guide section and the second guide section. The first guide portion rotates around the first rotation center and moves toward the take-up roller and the cutter. The first guide part and the second guide part rotate in opposite directions about the first rotation center and the second rotation center, respectively, with the first contact surface and the second contact surface abutting each other within a predetermined rotation range. This rotation causes the second guide portion to move toward or away from the take-up roller. The first guide part and the second guide part are set so that the object to be wound up is conveyed to the take-up roller, and after the take-up roller fixes the object to be wound up, when the first guide part is rotated toward the cutter part. The second guide portion also follows and rotates as described above, and separates from the take-up reroller. This provides sufficient space around the outer periphery of the cylindrical body of the winding roller, making it possible to wind up a large amount of objects to be wound up. When winding and rewinding a number of times, the first guide section is switched to the winding roller side, and after the last color image is developed, the recording medium is conveyed to the cutter side.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an image recording apparatus according to an embodiment of the present invention. In the figure, 1 is an electrostatic recording paper, 2 is a feeding roller that feeds out and winds up this electrostatic recording paper 1, 3 is an electrostatic recording head that forms a latent image on the electrostatic recording paper 1, and 4 is an electrostatic recording head that forms a latent image on the electrostatic recording paper 1. A pad roller 5 is used to press the electrostatic recording paper 1 against the electrostatic recording head 3, and 5 is a developing head 5 to which each color developer of black, cyan, magenta, and yellow is supplied.
a.

5b, 5C, and 5d are developing units configured to be rotatable by a motor (not shown); 5a, 5b are conveyance rollers that convey the electrostatic recording paper 1 in both forward and reverse directions; and 7 is conveyed by a conveyance roller 6. A guide plate for guiding the electrostatic recording paper 1, 8
9 is a first guide portion that guides the electrostatic recording paper 1 to a winding roller 10 or a cutter 13 (described later); 9 rotates together with the first guide portion 8 and guides the electrostatic recording paper 1 to the winding roller 10 and winds it up. A second guide portion 10 operates to separate from the surface of the take-up roller 100 after being guided to the take-up roller 10 so that a large amount of electrostatic recording paper l can be wound onto the roller 10.
11 is a winding roller that holds the leading edge of the electrostatic recording paper 1, fixes it, winds it up, and unwinds it; 11 indicates the electrostatic recording paper 1 that is conveyed to the cutter 13 by rotation of the first guide section; a cutter guide plate 12 that guides the cutter 13 to the cutter 13;
a and 12b are cutter conveyance rollers that convey the electrostatic recording paper 1 guided by the cutter guide plate 11 to the cutter 13; This is a cutter that cuts together.

FIG. 2 is a structural diagram showing details of the first and second guide portions 8.9 and the winding roller 10 shown in FIG.

As shown in the figure, the first guide section 8 includes a guide surface 8a, a first
The rotation center portion 8b and the first portion provided at the rear end of the guide surface 8a.
The second guide portion 9 is composed of a contact surface 8C and a guide surface 9a.
, a second rotation center 9b that rotates in accordance with the rotation of the first guide portion 8, and a second contact surface 9C that contacts the first contact surface 8C when rotating around the second rotation center 9b. be done.

The winding roller 10 has a first winding plate 10a that forms part of an arc, and another part of the arc, and has an arcuate inner surface so that the inner diameter is smaller than that of the first winding plate 10a. a second winding plate 1ob, first and second winding plates 10a,
A first arm is installed inside the hollow body composed of the first winding plate 10b, and the first arm is smaller than the inner diameter of the first winding plate 10a and comes into contact with the arcuate part of the second winding plate 10b. A cam I having a second arm arranged so that the first arm does not close the slit opening formed by the first winding plate 10a and the second winding plate 10b when they come into contact with each other.
Consists of OC. Furthermore, a rubber 10e that increases the frictional force is attached to a portion of the arc-shaped portion of the second winding plate 10b near the slit opening where the first arm of the cam IOC comes into contact.

The hollow cylindrical body formed by the first and second winding plates 10a and 10b is rotated in both forward and reverse directions by a winding motor (not shown) to wind up and unwind the electrostatic recording paper 1. The cam IOC is attached to a cam rotation shaft 10d provided coaxially with the rotation shaft of the hollow cylindrical body, and this cam rotation shaft 10d is rotationally driven by a cam motor (not shown).

The take-up remoter is configured to slip when a predetermined torque is applied to the take-up remoter, and the cam motor is configured to slip at a torque lower than this predetermined torque.

Figure 3 shows the axial arrangement of the cams, which are installed on the cam rotation shaft 10d provided inside the take-up roller 10, and have a total of six cam IOCs, four in the center and one at each end. installed.

The operation of this embodiment configured as above will be explained below.

First, the electrostatic recording paper l is fed out by the feeding roller 2, and a latent image corresponding to an image of a first color (for example, black) is formed by the electrostatic recording head 3. Next, the latent image formed by the electrostatic recording head 3 is developed into black by a black developer supplied from the developing head 5a of the developing device 5, and becomes a visible image, completing the recording of the first color. At this time, the leading edge of the electrostatic recording paper 1 is transported by transport rollers 5a and 5b, guided by a guide plate 7, and guided by a first guide section 8. It is guided by the second guide part 9, fixed to the winding roller 10, and wound up. Next, the electrostatic recording paper l is rewound to record the second color.
The winding roller 10 and the conveying rollers 5a, 5
b and is rewound by the feed roller 2 to prepare for recording the second color. Next, in order to record the second color, the rotational directions of the feeding roller 2 and the transport rollers 5a and 6b are returned to the positive direction (the same direction as when recording the first color), and the electrostatic recording paper l is moved in the forward direction. Transport to. In the recording operation for the second color, similarly to the first color, a latent image corresponding to the image of the second color (for example, cyan) is formed on the electrostatic recording paper 1, and the developing head 5b (
This latent image is made visible by K (supplying a cyan developer). Below, the 4th color (yellow color) is the same as the 1st color.
Repeat the recording up to. During this recording, the winding roller 1o repeats winding and rewinding operations of the electrostatic recording paper 1. When the recording of the fourth color is completed, the first guide section 8 guides the cutter to the cutter guide plate 11, and the cutter conveyance roller 12a,
12tl: The material is transported to a predetermined size by a cutter 13.

Next, the first guide section 8. Second guide section 9 and take-up roller 1
The operation of 0 will be explained using FIGS. 4 to 9. These figures show the steps in which the electrostatic recording paper 1 is guided by the first guide section 8 and the second guide section 9, its raw end is fixed on the take-up roller 10, and it is wound once.

FIG. 4 shows a situation in which the leading edge of the electrostatic recording paper 1 enters the slit opening of the take-up reroller 10. First guide section8. Second
The guide section 9 is set as shown, and the take-up reroller 10 is set so that the slit opening is at the same position as the guide plate 9a of the second guide section 90. This position represents the initial state of the take-up roller 10. FIG. 5 shows a state in which the cam IOC has started rotating clockwise.

In Figure 6, the first arm of the cam IOC is connected to the second winding plate 10b.
Shows the state in which it is in contact with. Due to this contact, the electrostatic recording paper 1 is pressed and fixed to the first arm and the second winding plate 10b. If a rubber 10e is attached to this abutting portion as shown in FIG. 2, this degree of adhesion will be further strengthened by frictional force. FIG. 7 shows a state in which the take-up remoter rotates and the take-up reroller 10 rotates about half a turn to wind up the electrostatic recording paper 1. FIG. 8 shows a state in which the electrostatic recording paper 1 has been completely wound around the take-up reroller 10 once and is securely fixed. FIG. 9 shows a state in which the first guide portion 8 is rotated toward the cutter 13 around the first rotation center portion 8b. This rotation causes the second guide portion 9 to rotate counterclockwise, but stops at a predetermined position. This rotation causes the rear end of the second guide portion 90 and the guide surface 9a to
0 becomes wider (widens, and the winding allowance of the winding roller increases. From this state, the winding roller 10 winds up the electrostatic recording paper 1 at the normal rotational speed. Since it is unnecessary for the leading edge of the electrostatic recording paper 1 to be fixed by the cam 10C, the cam motor is stopped.

FIG. 10 is a time chart showing the operations of the take-up motor and cam motor. The starting state is the state shown in FIG. From this point on, the cam motor increases its rotational speed as shown by the broken line, and once it reaches a predetermined speed, it maintains that speed. The cam IOC is also rotated clockwise by being rotationally driven by this cam motor. This state is shown in FIGS. 5 and 6. The operation of the cam IOC is shown by a dashed line. As shown in FIG. 6, the cam IOC stops rotating when it comes into contact with the second winding plate 10b. Therefore, the cam motor continues to rotate while slipping. Next, as shown in FIGS. 7 and 8, the winding motor rotates and the winding roller 8 winds up the electrostatic recording paper 1 once. In this state, the winding motor and cam motor are temporarily stopped to check the winding state. Next, as shown in FIG. 9, the interval between the second guide portion 9 and the take-up roller is widened to allow a large winding allowance, and the take-up roller is rotated at a regular winding speed. At this time, it is unnecessary for the cam IOC to fix the leading end of the electrostatic recording paper 1, so the cam motor is stopped.

Next, a correction process when the leading edge of the electrostatic recording paper 1 enters the take-up reroller 10 obliquely will be described.

Figure 11 shows that the tip of the electrostatic recording paper 1 is tilted to the winding roller 1.
This shows a situation in which the object enters the slit opening of 0. As shown in FIG. 2, a rubber 10e is attached to the second winding plate 10 on which the four central cams IOC come into contact. Further, the circumferential speed of the take-up roller 10 is set to be somewhat faster than the circumferential speed of the conveyance roller 6. Therefore, in the state shown in FIG. Because it is faster, tension is applied to the electrostatic recording layer l.For this reason, tension is applied to the middle part of the electrostatic recording paper 1. works, and the film is normally wound around the winding roller 10.

Next, a method of correcting the oblique input of the electrostatic recording paper 1 by changing the mounting angles of the cams 10C at the center and both ends instead of attaching the rubber 10e to the second winding plate 10b will be described.

FIG. 12 shows a state in which the mounting angles of the cam 1oc at the center on the cam rotation shaft and the cams IOC at both ends are changed. The solid lines indicate the mounting angles of the four cams IOC attached to the center, and the broken lines indicate the mounting angles of the two cams 10C attached to both ends. Winding is done clockwise, and the mounting angle of the cam IOC at the center is mounted so as to lead in phase from the mounting angles of the cam IOCs at both ends. As a result, when the slanted electrostatic recording paper 1 is fixed by the four central cams l0C (see Figure 11), tension is applied to the electrostatic recording paper 1, and the electrostatic recording paper 1 is automatically straightened and wound. Becomes taken.

Next, the operation from when one image is cut by the cutter 13 to when the winding roller 10 starts the winding operation is described in the first stage.
This will be explained with reference to flowcharts in FIGS. 3 and 14.

In FIG. 13, the image recording apparatus of this embodiment starts the recording process when the recorded image is cut by the cutter 13. Therefore, first place the electrostatic recording paper 1 in the cutter 13.
If there is no electrostatic recording paper, check step 21 as an error in one set of electrostatic recording paper.
), if so, it is determined whether or not it has been cut (step 22), and if it has not been cut, it is corrected as a cut not executed error (step 23), and the state is set to be correctly cut. This state becomes the starting point for a new image recording process (step 24).

Step 25) of rewinding the electrostatic recording paper 1, and checking whether it has been rewound a specified length (steps 26 and 27). This specified length is the position where the leading edge (cut position) of the electrostatic recording paper l returns to the guide plate 7 in FIG. Next, the first guide section 8 and the second guide section 9 are rotated so that the electrostatic recording paper is conveyed toward the take-up reroller 10 (step 28).
. Once the rotational position of the first guide section 80 has been confirmed (step 29), it is rotated to a predetermined position and the switching operation of the electrostatic recording paper 1 is completed (step 30). Next, the winding roller 10
The slit opening position is rotated five times to the position shown in FIG. 2 (step 31), and the sensor confirms that this position has been reached (step 32), and the opening positioning work is completed (step 33). Next is the conveyance roller 6a.

As the electrostatic recording paper 1 is fed out by the first guide portion 8. The tip is guided by the second guide part 9 and inserted into the slit opening of the take-up roller 10 (step 34), and the cam motor starts rotating to fix the tip (step 35).
The take-up reroller 10 starts rotating, and the electrostatic recording paper 1 is conveyed (steps 36 and 37).

When the electrostatic recording paper 1 has been wound once around the take-up roller 1O, the rotation of the take-up roller 1° is stopped (Step 38), and it is checked whether the electrostatic recording paper 1 is securely fixed to the take-up roller 1O (Stella 39).
), if it is not fixed, the fixing operation is performed again, and if it is fixed, the electrostatic recording head 3 starts forming a latent image from this point.

Effects of the Invention As is clear from the above explanation, the present invention provides a cam in the winding roller to fix and release the tip of the body to be wound, and furthermore, the winding body is attached to the winding roller. To automatically correct even if it is inserted obliquely. In addition, a guide part is provided close to the winding roller so that the object to be wound is inserted into the opening of the winding roller, but after the tip of the object to be wound is fixed to the winding roller, it is separated from the winding roller and is wound. You will be able to earn a large amount of money. By using such a winding roller and guide section in an image recording apparatus, it is possible to automatically create a multicolor image and cut it.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a detailed structural diagram of the switching guide section and the take-up roller, and Fig. 3 is a diagram showing the arrangement of the cam provided in the take-up roller on the rotating shaft. , Figures 4 to 9 are diagrams explaining the operation of the switching guide and the winding roller, Figure 10 is a diagram showing the rotation speed of the winding remoter and cam motor, and Figure 11 is a diagram showing the rotational speed of the winding remoter and the winding roller. Figure 12 shows the mounting angle of each cam on the cam rotation shaft. Figures 13 and 14 show the winding roller winding from the start of the recording process. FIG. 3 is a flow diagram showing the operations up to this point. 1... Electrostatic recording paper, 2... Feeding roller, 3...
Electrostatic recording head, 4--putt roller, developing device, 6-conveyance roller, 7-guidance plate, 8-first
Guide part, 9... second guide part, Ba, ga... guide surface, 8b... first rotation center part, 8C... first contact surface,
9b...Second rotation center, 9C...Second contact surface, 1
0... Winding reroller, 10a... First winding plate, 1
0b...Second winding plate, IOC...Cam, 10d...
・Cam rotation shaft, 10e...Rubber, 11...Cutter guide plate, 12...Cutter conveyance roller, 13...Cutter

Claims (4)

[Claims] (1) A hollow cylindrical body having a slit opening in the axial direction and an inner diameter in a predetermined angular range from one end of the slit opening is smaller than the inner diameter in other angular ranges, and a rotary member provided coaxially within the cylindrical body. A first arm disposed on the shaft that is smaller in inner diameter than the other angle range and larger than the inner diameter in the predetermined angle range and the first arm does not close the slit opening when it comes into contact with the inner diameter part in the predetermined angle range. a cam having a second arm arranged in such a manner, a cam rotation device that rotationally drives the rotating shaft and slips when the torque exceeds a predetermined torque, and a cam rotating device that rotationally drives the cylindrical body and causes the cylindrical body to slip when the torque exceeds the predetermined torque. A take-up roller comprising a cylindrical body rotating device. (2) The cam is provided at both ends and the center of the rotating shaft, and the friction force between the first arm of the cam in the center and the inner diameter portion in the predetermined angle range that comes into contact with the first arm is transferred to the first arm at both ends. The take-up roller according to claim 1, characterized in that the friction force is greater than the same friction force of one arm. (3) The cams are provided at both ends and the center of the rotating shaft, and the first arm of the cam at the center has a phase angle that is more advanced in the winding rotation direction than the first arms of the cams at both ends. The take-up roller according to claim 1, wherein the take-up roller is attached to the rotating shaft. (4) A recording unit that repeatedly forms a latent image of each desired color on a recording medium and develops it to form an image; a conveyance roller provided downstream of this recording unit that conveys the recording medium; and a side of this conveyance roller. a first rotation center provided at
a second contact surface having a second contact surface at one end of the guide surface that rotates in contact with the first contact surface within a predetermined rotation angle range and rotates around a second rotation center provided below the guide surface; a guide part; a hollow cylindrical body provided downstream of the second guide part and having a slit opening in the axial direction and having an inner diameter in a predetermined angular range from one end of the slit opening that is smaller than the inner diameter in other angular ranges; When the first arm, which is disposed on a rotating shaft provided coaxially within the cylindrical body and is smaller than the inner diameter of the other angular range and larger than the inner diameter of the predetermined angular range, comes into contact with the inner diameter portion of the predetermined angular range. a cam having a second arm arranged so that the first arm does not close the slit opening; a cam rotating device that rotationally drives the rotating shaft and slips when the torque exceeds a predetermined torque; and a cam rotating device that rotationally drives the cylindrical body. An image recording apparatus comprising: a winding roller having a cylindrical rotating device that slips at a torque greater than the predetermined torque; and a cutter section provided downstream of the first guide section.