JP2558111B2 - Copying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an apparatus such as a copying machine, a facsimile, a printer or the like (collectively referred to as a copying apparatus) of a type using roll paper as an image support.

[Prior Art] Generally, in a copying machine that uses roll paper, the roll paper is placed in a storage box that can be loaded into and pulled out from the apparatus body. It is pulled out from the core by a paper feed roller arranged to an appropriate length, cut into a predetermined length by a cutter, and then conveyed to an image transfer portion of the apparatus to carry an image.

One of the problems in such an apparatus is the length of the paper conveyance time from the core to the image transfer section, which is one of the determining factors of the copying time. That proposal has been made. For example, JP-A-53-68229
In Japanese Patent Laid-Open Publication No. 2004-242242, there is proposed a technique in which the leading end of the roll paper is advanced to a predetermined position further forward of the cutting position and is made to stand by, thereby shortening the paper transport time.

[Problems to be Solved by the Invention] Although this conventional technique has an excellent effect of being able to shorten the paper transport time, on the other hand, on the other hand, the roll paper storage box cannot be installed in the main body of the device when inspecting the device or replacing the roll paper. When the paper is pulled out from the roll paper storage box, the advanced paper portion is pulled out from the roll paper storage box. For this reason, after the inspection, when the storage box is loaded into the apparatus again, the extra roll paper that has been eaten out must be carefully rewound manually, which is a troublesome work. At the same time, when the storage box is pulled out, the paper portion that is eroded causes indentations, wrinkles or damage due to contact with other members such as rollers, so that it is no longer used as an image support. It resulted in the uneconomical of having to cut and waste.

[Means for Solving the Problems] In order to solve the above problems, the copying apparatus according to the present invention is equipped with a paper feed roller for pulling out roll paper from the core and is loaded in a storage section of the apparatus main body. And a roll paper storage box that is arranged so that it can be pulled out, a feed roller that is arranged in the main body of the apparatus, and that receives the leading edge of the paper that has been pulled out by the paper feed roller and advances it to a predetermined position, and opens and closes the storage section. In a copying apparatus having a possible door and a lock device that locks the door in a closed state and automatically releases the lock in response to an electric signal, the lock device is turned on / off, and the paper feed roller and the feed roller are fixed. It has a control means for controlling the reverse rotation, and the control means reversely rotates the paper feed roller and the feed roller in accordance with an instruction to open the door, so that the leading edge of the paper from the feed roller is removed. After pulling back, the door is automatically unlocked so that the door can be opened, and when the door is closed, the control means causes the supply to be performed based on the turning on of a switch that is energized in conjunction with the operation of the door. It is characterized in that the paper roller and the feed roller are normally rotated to automatically advance the front end of the paper to a predetermined position.

[Operation] According to the present invention, by such means, the paper feed roller reversely rotates before the door is opened, and the fed roll paper is pulled back to eliminate the extra paper feeding, and then the lock device is not operated. To unlock the door.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the appearance of an example of a copying apparatus according to the present invention.
A roll paper storage box 5 (shown in FIG. 3) is provided below the apparatus main body 1.
A storage unit 2 for loading the is provided. The rear side of the apparatus main body is opened so that the storage box can be loaded into or pulled out from the storage section 2, and a door 3 is pivotally attached to the apparatus main body 1 at one side so that the opening can be opened and closed. Has been.

A lock device 4 is provided to lock the free end side of the door 3 to the main body of the device when the door 3 is closed.

As shown in detail in FIG. 2, the lock device 4 is provided with a roller 7 rotatably provided on a support shaft 6 protruding from the inner surface of the door 3.
And a latch device 8 which is provided on the device body 1 and which engages with and holds the roller 7 when the door 3 is closed. The latch device 8 has a latch 11 which is pivotally attached to the side plate 1a of the device main body 1 at the substantially center thereof and whose rear end is connected to the plunger of the electromagnetic solenoid 9.
Is provided. The latch 11 is provided with a guide side 12 which is inclined downward to guide the roller 7 and a recess 13 for accommodating the roller 7 at the lower end of the guide side 12, and one end of which is provided with a side plate 1a of the apparatus body. The tension spring 14 fixed to the member 11 and the other end to the member 11 is constantly biased counterclockwise as viewed in FIG. As a result, when the door 3 is closed, the roller 7 moves forward while pushing up the latch 11 in the clockwise direction in accordance with the operation of the door 3 and drops into the recess 13 to be locked.

On the other hand, a door pushing device 16 is arranged below the lock device 4. The pushing device 16 includes a guide member 17 fixed to the side plate 1a of the main body of the device, and a pin 18 supported by the guide member 17 so as to be slidable in a substantially horizontal direction and prevented from coming off.
Due to the action of the compression spring 21 arranged between the annular flange 19 of the pin 18 and the guide member 17, the pressure is always biased to the left as viewed in FIG. On the other hand, the actuator 40 is fixed to the inner surface of the door 3 at a position where it can come into contact with the rear end surface of the pin 18.
When the door 3 is closed, this actuator 40 pushes the pin 18 against the action of the spring 21 and moves it forward. In this state, it is locked by the lock device 4. Thus, when the lock device 4 releases the door, the action of the spring 21 causes the door 3 to move.
Is pushed out and the storage is opened.

The micro switch 20 is arranged to be turned on / off in response to the movement of the pin 18 accompanying the opening / closing operation of the door 3. Output signals from the micro switch 20 are CPU, ROM, RA
It is sent to the control unit 30 (FIG. 4) as a control means composed of M.

FIG. 3 shows a roll paper feeding section. Roll paper storage box 5
Is a casing whose upper part is open, and is supported by an appropriate guide means such as a slide rail so that it can be slid horizontally with respect to the apparatus main body 1 and can be pulled out or loaded. In this example, two rolls of paper 2 of different sizes are stored in the storage box 5.
2 and 23 are rotatably accommodated, and paper feed rollers 24 and 25 for sandwiching the roll papers 22 and 23 from both sides and appropriately pulling out the roll papers 22 and 23 are provided above them. These rollers
24 and 25 are connected to a roller driving source arranged in the apparatus main body 1 when the storage box is loaded in the position shown by the solid line in the drawing, and supply paper corresponding to the roll paper designated according to the command transmitted from the control unit 30. The paper roller is selected and driven in the specified direction.

The roll paper 22 or 23 pulled out by either the paper feed roller 24 or 25 is guided through a guide 27, 28 to a feed roller 29 which is a pair of a drive roller and a driven roller. A cutter 31 that cuts the roll paper into a predetermined length by a cutting command from the control unit 30 is provided downstream of the feed roller 29, and the paper cut by the cutter is driven by a main roller 32 to transfer an image to a copying apparatus. It is transported to a section (not shown).

In order to control the conveyance of the paper, the paper size sensors S1 and S2, the backward position sensors S3 and S4 are arranged on the guides 27 and 28,
A timing sensor S5 is arranged immediately before the main roller 32.

Next, the operation of the paper feed unit and the door will be described. Storage box 5 with roll paper 22 and 23 set as shown by the broken line in FIG.
When the device main body 1 is loaded and the door 3 is closed, the micro switch 20 is turned on, and the control unit 30 rotates the paper feed roller 24 and the feed roller 29 to pull out the roll paper 22 and feed it forward. When the timing sensor S5 detects the leading edge of the roll paper, the paper feed roller 24 and the feed roller 29 stop, and the paper stands by at that position. At this time, the size sensor S1 detects the paper size of the roll paper 22 and displays the size on the display unit of the operation panel of the apparatus body via the control unit 30.

To print on the roll paper 22, press the print button in this state. As a result, desired image formation is started in the image forming section, and at the same time as the operation of the image forming section, the paper feed roller 24 and the feed roller 24 are formed.
29 and the main roller 32 are driven to feed the paper, and when the feeding is performed for a predetermined length, the cutter 31 operates to cut the paper. The main roller 32 conveys the cut paper to the transfer section of the apparatus. The leading edge of the subsequent roll paper is pulled out in the same way as above, and the timing sensor is used for the next print.
Wait at S5. For example, an encoder is provided concentrically with the driven roller of the feed roller 29 to detect the length of pulling out the paper, and this can be performed.

On the other hand, when it is desired to print the roll paper 23, the roll paper selection switch on the operation panel is switched. The paper feed roller 24 and the feed roller 29 are reversely rotated in response to a command from the switch, and the already advanced roll paper is pulled back until the leading end thereof is detected by the retreat position sensor S3. Next, the paper feed roller 25 and the feed roller 29 are rotated in the forward direction, and the roll paper 23 is advanced to the timing sensor S5 in the same manner as described above to be on standby.

If it is necessary to inspect the paper feed unit or replace the roll paper, operate the door open button on the operation panel. As a result, the paper feed roller 24 or 25 and the feed roller 29 are reversely rotated, and the previously fed paper is pulled back. Rear end position sensor
When S3 or S4 detects the pulled-back paper front end, the control unit 30 slightly delays the paper feed roller 24 or 25 and stops it. At this time, the front end of the paper is pinched in a state of slightly protruding from the paper feed roller. Then, the electromagnetic solenoid 9 of the door lock device 4 is momentarily energized. As a result, the latch 11 is disengaged from the roller 7, and the door 3 is automatically opened by the action of the pushing device 16. When the micro switch 20 engaged with the pin 18 is turned off along with this opening, the control unit 30 causes the drive unit in the paper feeding unit where the operator may touch to prevent danger, for example, the cutter 31, The operation of the feed roller 29, the paper feed rollers 24, 26, etc. is prohibited.

Incidentally, the latch 11 has a handle portion integrally projecting to the outside, and when the power of the apparatus is cut off, the latch 3 can be manually operated to open the door 3 by operating the projecting handle portion. it can.

[Effects of the Invention] According to the present invention as described above, it is possible to shorten the paper transport time by advancing and waiting a desired roll paper, and when pulling out the roll paper storage box, Since the door is opened to automatically open the roll paper to the specified position and then automatically, it is easy to re-load the storage box, which is required in the past, such as rewinding the eaten paper. In addition, there is an advantage that the paper can be economically used by eliminating the cause of wrinkling, bending, damage, etc. of the hot paper that may occur when the storage box is pulled out.

[Brief description of drawings]

FIG. 1 is a view showing the external appearance of a copying apparatus according to the present invention, FIG. 2 is a side view showing a door locking device of the apparatus shown in FIG. 1, and FIG. 3 is a side view showing a sheet feeding section of the apparatus shown in FIG. 4 and 5 are block diagrams of the electric control means of the apparatus shown in FIG. 1 ... Device body, 2 ... Storage unit, 3 ... Door, 4 ... Lock device, 5 ... Storage box, 22, 23 ... Roll paper, 24, 25 ... Paper feed roller 29 ... Feed roller .

Claims (1)

(57) [Claims] 1. A roll paper storage box provided with a paper feed roller for pulling out roll paper from a winding core and arranged so that it can be loaded into and pulled out from a storage portion of the apparatus main body, and a roll paper storage box disposed inside the apparatus main body. A feed roller that receives the leading edge of the paper pulled out by the paper feed roller and advances it to a predetermined position, a door that can be opened and closed with respect to the storage unit, locks the door in a closed state, and locks the lock to an electric signal. In accordance with the present invention, a copying apparatus having a lock device that automatically releases the lock device has a control unit that controls ON / OFF of the lock device and forward / reverse rotation of the paper feed roller and the feed roller, and the control unit operates in accordance with an instruction to open the door. The paper feed roller and the feed roller are reversely rotated to pull back the paper tip from the feed roller, and then the door is automatically unlocked to enable the door to be opened, and When the door is closed, the control means rotates the paper feed roller and the feed roller forward in response to the turning on of a switch that is urged in conjunction with the operation of the door to automatically advance the leading edge of the paper to a predetermined position. Characteristic copying machine.