JPS5859462A - Image recording device - Google Patents

Abstract

PURPOSE:To secure the accuracy of a position at the time of attaching and detaching a photoreceptor, by having constitution in which a belt unit of the photoreceptor converted to in a cassette and a developing unit are unified by clamp to fit in on a main body. CONSTITUTION:When the restraint by a pin of a tension lever 29 is released, a tension roller 23 is pushed by a spring 32 and a belt 2 of the photoreceptor is stretched. When a belt unit 1 is pushed into a main body of a copying machine while putting a guide pin 31 along a rail 35, a crank pin 36 is engaged to a blanket 37 and a correct position is determined. A developing unit 6 is fitted to the main body by engaging a channel 38 to a pivot 39 and rotating a crank lever 40 and pushing a crank pin 42 by a crank spring 41. When a belt unit made in a cassette is fitted to the main body by such a way, as the belt unit is made in one body with the developing unit by a clamp means, the accuracy of a position at the time of attaching and detaching a photoreceptor is secured easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer type image recording device using an endless belt-shaped recording medium. In an image recording device, a recording medium is mounted between a drive roller 2 and a tension roller, which are electrically provided at a fixed position, and the tension roller tensions and loosens the recording medium, thereby attaching and detaching the recording medium. I'm trying to get them to do it.

However, the periphery of the recording medium is charged with electricity - recording - scratches - transfer.
Various devices 2 that sequentially execute recording processes such as cleaning as the recording medium moves, and a mechanism for feeding and conveying paper at a fixed timing are provided, so that the work of attaching and detaching the recording medium is facilitated. Moreover, when a recording medium is loaded, it becomes difficult to ensure the positional accuracy of the various devices installed around the recording medium without causing the surface of the recording medium to rise or sink. ing.

The present invention has been made in consideration of the above points, and it is possible to make the belt unit into a cassette, thereby making it easier to handle when installing and removing the recording medium, and to easily ensure positional accuracy of 8. In addition, we provide a transfer type image recording device using an endless belt-like recording medium, which is advantageous in terms of structure and image recording by making full use of the characteristic of the belt having an arbitrary shape. It is something to do.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the image recording apparatus according to the present invention, as shown in FIG. 1, a belt unit 1 (see FIG. 2) formed into a cassette so as to be detachable from the main body, and an endless belt-shaped belt unit IKΣ An AC charger 32 for static elimination and a DC charger 4 for charging (both chargers 3.4 (the recording medium 2 is uniformly charged), the recording head 5 has a stylus arranged in an array in the main scanning direction with respect to the recording medium 2 surface, and the developing unit 6 is detachably installed from the main body. (See Fig. 2), an electrostatic recording 10-seat system consisting of a transfer charger 72 and a cleaning unit 8, and a recording paper lo in a cassette 9 or a recording paper manually set on a table 11 with its leading edge facing the recording medium 2. l]Iig developed in
I! The feed roller 12f or 13. feeds the paper to the transfer position at a timing T that coincides with the leading edge of the sheet. Registration roller 1
48 and a transfer feed roller 15, a belt mechanism 16 that conveys the transferred record@paper, and a fixing unit 1 that performs a fixing process on the conveyed record@paper.
7, and a paper discharge roller 19 that sends the paper to be fixed to the tray 18. The first developing unit 6 includes a developing roller 62 provided within its case 61.
．． The IA image crawler 62 [developing blade 63 which adjusts the amount of developed toner]. Consisting of a toner cassette 64 that supplies toner into the case 61, the toner cassette 64
can be easily replaced from above the case 61. Further, the cleaning unit 8 includes a mag roller 82 having a flocked sleeve 81 on its surface. A transfer roller 83 that transfers the toner attached to the flocking sleeve 81. A blade 84 scrapes off toner adhering to the transfer roller 83
．． A container 85 for collecting scraped toner includes a toner scraping spring 86 for transporting the toner inside the container 85 to the outside. In addition, the fixing unit 1) includes a Brera shallow-y 171 and a heat roller 173 provided with a heater run 1172. It consists of a separation claw 176 on which a spring 175 is mounted. Additionally, there is also a flexible pad 2012 and a lever 202 for feeding the sheets of paper 10 in the cassette 9 one by one. A friction mechanism consisting of a spring 203 is provided corresponding to the feed roller 12 portion.

Furthermore, sensors 81, 82, and 83 are provided on the recording paper feeding path to detect whether or not recording paper is fed.
Also, a sensor S detects the end of the recording paper in the cassette 9.
4 forget lever 21. A sensor 85E and a lever n, which detect that m recording sheets have been ejected from the paper ejection roller 19,
It also detects the deviation of the recording medium 2 in the main scanning direction.
A sensor S6 is provided respectively.

Furthermore, a conductive brush for grounding the conductive layer of the recording medium 2 is provided at the tension roller 23 portion of the base unit 1.

FIG. 2 shows a specific mechanism for detachably attaching the belt unit 12 and the developing unit 6 to the main body. 8 in the figure, the cassette-shaped belt unit 1 has a V-shaped drive roller 26 rotatably attached between frame plates 251 and 252. This configuration is achieved by mounting the endless belt-shaped recording medium 2 on the tensile roller 232 and the idle rollers 27, 2B (see FIG. 1). 1j2, 1 piece for belt unit 1, its frame plate 25
1,252, a back roller 45g of the recording head 5 and a back roller 46 of the cleaning unit 8 are each integrally assembled. Also, Tenshi Adventure Roller 2
3C, the elongated holes provided at both ends of the frame plate 251 through the tensile levers 29 respectively.
, 252 , the guide bins 31 provided respectively in
(and a spring 32 is provided between the end of the tensilon lever 4 and the guide pin 31, respectively.) The tension lever 4 can be slid in the direction of contracting against the spring 32 VC to release the restraint of the recording medium 2 by the tensile roller 23, and the end of the tensile lever 4 can be hooked to the pin 33 to replace it. Attach the belt unit 1 to the main body (1) by pushing it horizontally in the direction of the arrow in the figure. 2, along the installed rail 35 and the roller shaft 231.2.
61 to the main body side plate 34 [Align the belt unit 1g
The crank bin 36 provided with the 4I/C is pushed in until it engages with the fixing bracket 37 provided on the rail 35 portion and descends.

The crankbin 36 and the fixing bracket 37 are held together at four points, and the belt unit 1
Attachment to the main body will be perfectly positioned. Next, the developing unit 61 is attached to the main body, but at this time,
Pivots 39 attached to both sides of the main body side plate 34 connect grooves 38 provided at the bottom of each side plate of the case.
The clamp spring 41 is connected to the developing unit 611 by operating the gran lever 40 provided on the main body side.
1, the provided clamp bin 42K acts to push the developing unit 6 toward the main body, and in this state, the clamp lever 40 is hooked to the fixing bin 43K to complete mounting of the developing unit 6 to the main body. Further, the position of the developing roller 62 of the developing unit 6 with respect to the recording medium 2 surface of the belt unit 1 is adjusted appropriately using adjustment screws 44 (each tip of which collides with an end surface of the frame plate 251, 252 of the belt unit 1). Now that it can be adjusted 20, once the adjustment screw 44 is adjusted and locked, there is no need to adjust it every time the developing unit 6 is attached or removed.

Therefore, when attaching the belt unit 1z and the developing unit 6 to the main body, if the crank lever 40 is operated and the developing unit 6 is pushed toward the main body by its clamp spring 41, the inner body of the belt unit 1 can also be pushed in by its adjustment screw 44. By locking the crank look-40, the belt unit IE and the developing unit 6 are integrally cranked to the main body.

Therefore, in the image recording apparatus tVC according to the present invention, the belt unit 1 is made into a cassette and has a detachable structure that can be inserted and removed in the horizontal direction together with the developing unit 6. The belt unit 1 can be easily attached and detached without being obstructed by other equipment, and the recording medium 2 can be replaced with the belt unit 1 removed from the main body. In addition, by making the Velsito unit 1 itself elongated so that it can be attached to and removed from the main body in a horizontal direction, it becomes possible to arrange other peripheral devices horizontally, and as shown in FIG. The overall thickness of the apparatus can be effectively reduced by forming the recording head in a 5 ft L-shape and by providing the recording paper feeding and conveying paths almost horizontally. 2. The recording paper feeding and I9 feeding paths are designed to be almost straight (However, in the transfer section, the recording paper is pressed against the two sides of the recording medium to ensure good transfer. ), it has become a symbol of reliability with a low probability of jam occurrence.

Further, in the image recording apparatus according to the present invention, as shown in FIG. Plunger solenoid 48.4 for driving the tip 4 of the 4th up and down
A twist adjustment mechanism for the recording medium 2 consisting of 9 is provided, and the link lever 47 is adjusted by appropriately driving the plunger solenoid 48 or 49 according to the output of the sensor S6 that detects the twist of the recording medium 2. By tilting one end of the tension roller upward or downward through the tension roller, the skew of the recording medium 2 can be automatically adjusted. 2. In the figure, 50 indicates a tent spring. In addition, in the uniform recording apparatus according to the present invention, as shown in FIG. The development roller 62 enables the development process with the K recording medium 2 wrapped around it.The development process with the K recording medium 2 wrapped around the developing roller 62 means that the nip width is large, so that the image is not easily formed. This is advantageous especially when the belt unit 1 and the developing unit 6 are constructed to be relatively removable, since it allows the density to be improved and the positional accuracy of the developing roller 62 relative to the two surfaces of the recording medium to be coarsened. becomes.

Note that when installing the idle rollers 28, the idle roller row is placed diagonally downward (by arranging , the recording medium 2 is prevented from slipping v. Also, since the slope gKfA of the recording medium 2 which is applied between the drive roller and the idle roller Vcg is brought into contact with the image low roller T, the recording medium 2 is prevented from slipping. The drive roller 26 is advantageous in terms of toner supply during the developing process of the recording medium 2. Also, since the drive roller 26 is located immediately after the recording head 5, it is advantageous in terms of toner supply during the developing process of the recording medium 2. This is desirable for securing stacking.Also, a gear 5111ti& is placed on the shaft of the drive roller to connect it to the developing roller 6.
The belt unit 1 and the developing roller 62 are driven by meshing with the gear 52 provided on the shaft of the belt unit 1 and the developing roller 62.
This makes it possible to easily attach and detach the device.

Note that the gear ratio is normally selected so that the rotational speed of the developing roller 62 is 1.5 to 3 times the circumferential speed of the recording medium 2. In addition, an idle roller 271 is installed in the belt unit l.
By arranging the transfer charger 7 at the corresponding location to perform the transfer, the transfer position can be brought closer to the paper feed section, and therefore the transfer charger 7 can be placed at a shorter interval than the sheet paper. The number of conveyance rollers required for transfer is small, and it is advantageous for aligning the edge of the image frame portion of the two sides of the recording medium and the recording paper at the transfer position, and for skiing, etc. Recording paper with 2 marks afterward
In the present invention, when separating the recording paper 10 from the two surfaces of the recording medium, the recording paper 10 is separated from the tension roller 2 by its own stiffness.
3, the recording medium 2 is naturally separated at the curved portion of the recording medium 2. In this case, the radius of curvature of the recording medium 20 at the tension roller 23 is set to be small, so that the recording medium 2 and Even if an electrostatic attraction force acts between the recording paper 10 and the recording paper 10, the stiffness of the recording paper 10 can sufficiently overcome the electrostatic attraction force and ensure that it is separated from the two sides of the recording medium. That's what I do.

Figure 5 is an image record of Figure 1 f! In particular, in the present invention, the drive system is divided into two systems so that the recording apparatus can be driven more efficiently in one hour. T, that is, belt unit IK
a drive roller 26 (coupled with the developing roller 62);

A first system whose drive source is a step motor M1 that drives the transfer feed roller 15 (belt-coupled with the registration roller 14), and the feed roller 12.
or 13. Cleaning unit 8° belt mechanism 16
Heat roller 173 (
A second system is connected to a second system whose drive source is an induction motor M2 that drives a chain connected to a paper ejection roller 19. B. In the first system, 53 to 56 are pulleys attached to the motor output shaft 2 and each roller shaft, 57 and 58 are timing belts, respectively, and the transfer feed roller 15 and pulleys Two electromagnetic clutches 59 are interposed between the two IC'1 IC@clutches 59, and when the IC@clutches 59 are engaged, the transfer feed roller 15 is driven to send the recording paper to the transfer section. Also in the @2 system, 91-94
is the tin rocket attached to motor shaft B and each roller shaft, 95.96 is the chain, and 97 to 99
8 indicate idlers, and eight electromagnetic clutches 100 are inserted between the feed roller 13 and the tin rocket 93.
The feed roller 13 is driven only when 00 is input. Furthermore, a one-turn clutch 101 is interposed between the feed roller 12 and the tin rocket 92. Also, in the cleaning unit 8,
A tin rocket 102E and a gear 103 are provided so that driving force is transmitted to the transfer roller 83 via the tin rocket 103. Furthermore, belt mechanism 1
For the 6E Yohi fixing unit 17, the tin rocket 104, the TOSG gear 106,
K so that the driving force is transmitted via 107.

Therefore, by dividing the drive system into two systems in this way, specifically limiting the objects to be driven by the step motor M1 to the necessary minimum, and separately driving the others by the induction motor M2, the Stella 1 motor can be realized. By reducing the load on the 4M1, it is possible to effectively (ensure) the feeding accuracy of the recording medium 2 in the sub-scanning direction and the accuracy of the feeding timing of the recording paper to the transfer position, and it is also possible to perform intermittent recording. S1 In the present invention, the drive roller in the S@tC belt unit 1 drives the belt.The influence of the backlash crystal of the GX and four-wheel motor M1 is absorbed during the belt transmission, and the gear coupling is performed. This is done so that the effect does not become jitter, as would happen if the

Further, in the image recording device Vc1 according to the present invention, @1
As shown in Fig. @5, there are two paper feeding systems: automatic paper feeding z using the cassette 9 and manual paper feeding using the table IIK.The automatic paper feeding system operates normally, and the manual feeding system operates when paper is fed manually. The automatic paper feeding system is given priority over the automatic paper feeding system. Ttゎchi, when the recording paper is set on the manual feed table ll, it is detected by the sensor BIK,
The detection output (accordingly, the electromagnetic clutch 100 is engaged and the feed roller 13 is driven, and the table 1
When the recording paper on 1 is fed a, a one-turn clutch 1o1 (a structure t/Cf that rotates once each time a solenoid (not shown) is pulled) is activated in response to the output of sensor s1.
When the feed roller 12 is stopped by tripping at 1), and the leading edge of the manually fed recording paper is detected by the sensor S2, the electromagnetic clutch 100 is turned off after a certain period of time.
The one-turn clutch 101 is turned on to return to normal automatic paper feeding. 2. The one-turn clutch 101 has a structure in which a solenoid (not shown) is pulled in one turn (each time it makes one turn, it has a structure of P:I). Specifically, the one-turn clutch 101 has a signal processing that does not pull the solenoid at all. The recording paper that is fed by hand is fed by the registration roller i4.
A small loop is formed in front of the .

Furthermore, as shown in FIG. 1, the art recording apparatus according to the present invention is provided with a mask mechanism 108 that can appropriately limit the width of the transfer charger 7 (in the main scanning direction) to record a narrow width. A mask can be applied to prevent the recording medium 2 from being directly exposed to the transfer corona when transferring it to paper. If this happens, the surface potential will be greatly changed and will not be at the same potential as other parts during the next copy cycle when it is recharged, resulting in writing errors, background stains, etc. Therefore, when using multiple types of recording paper with different paper widths, K can partially mask the transfer charger 7 when the width of the recording paper fed to the transfer position is narrower than the recording medium 2. Mask mechanism 10
8, the transfer charger 7 as shown in FIG.
A bracket 110 disposed below and rotatably attached to a fixed shaft 109; A spring 112 is installed between the lower end of the bracket 110 and the fixed leg side so as to tilt the bracket 110 in the direction in which the bracket 110 is set. and a lever 114 that is tilted against a spring 112 to reset the mask 111 from above the transfer charger 7. fXB, a sensor for detecting the paper width is provided in the paper feed path of the recording paper, and the sensor m is applied to the force. Depending on the situation, it is also possible to automatically set and reset the mask 111 via the solenoid means 1j. By controlling the transfer charger 7 on and off, the recording medium 2 is prevented from being directly exposed to the transfer corona.

FIG. 7 shows another example of the mask mechanism.
In this case, brackets 118 and 118' each having a mask 117 and 117' attached thereto are screwed onto a feed screw 116 gear-coupled to a DC motor 4115, and the moving position of the bracket 118' is detected step by step. Microswitches SWI to SW3 are provided, and the outputs of the microswitches SW1 to SW3 (depending on the DC motor 11
5, the mask width acting on the transfer charger 7 is set to II! of the recording paper. This allows for gradual changes depending on the situation.

In this case, the screws of the brackets 118 and 118' to the feed screw 116e'C are in a reverse thread relationship with each other, and the brackets 118, 118 are screwed together in accordance with the rotation of the feed screw 116. 'The gap is widened or narrowed.

As described above, in the image recording apparatus according to the present invention, there are two types of image recording apparatuses: a transfer type using an endless belt-shaped recording medium;
%, the belt unit is made into a cassette, and it has a structure that can be freely attached and detached together with the developing unit. It has the excellent advantage that the belt unit g and developing unit can be easily replaced, and the positional accuracy of the belt unit g and the developing unit can be easily ensured. By adopting a belt unit structure that takes advantage of the ability of the media to freely shape, it is advantageous in terms of thinning of the device, development with two rolls, curvature separation of the recording paper, sub-71:f feeding of the recording medium, etc. It has various excellent advantages such as being able to

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of an image recording apparatus according to the present invention, and FIG. Figure 3 is a front view showing the structure of the tension roller part in belt unit 2, Figure 4 is a diagram showing the mounting state of the recording medium in belt unit Vcg, and Figure 5 is a front view showing the structure of the tension roller part in belt unit Vcg. FIGS. 6, 8, and 7 are perspective views showing configuration examples of a mask mechanism of a transfer charger, respectively. l...Belt unit 2-recording medium 3-...A
C charger 4...DC charger 5...
Recording head 6...Developing unit 7...Transfer charger 8-Cleaning unit 9...Paper feed cassette 11...Manual feed table 12, 13...
・Feed roller 14...Registration roller 15・
...Transfer feel l'o-ra 17...Fixing unit 18
...Exhaust aO-ra n...Tension opening roller 26.
...Drive roller Ml...Step motor M2
...Inductor Motor Applicant's Representative Kiyoshi Torii Figure 6 trt Figure 7 11 Procedural Amendment January 12, 1980 Commissioner of the Japan Patent Office Shima 1) Haruki Tono1, Indication of Case 1988 Patent Application No. 158296 2, Name of the invention Image recording device 3, Relationship with the person making the amendment Patent applicant No. 6 No. 6, 1-3 Nakamagome, Oide-ku, Tokyo, Agent] 6. The invention made by the amendment Number 7, Detailed explanation of the invention in the specification subject to amendment - & Contents of amendment @ Specification page 16 g approval to first line 1, r on'' to ``
Correct it to ``enabled state'' and insert ``Kr system'' after ``@Kan-feeding'' on the Flth line u, and insert ``Respond to print command'' on the 14th line, next to ``r 101''. do.

Claims (1)

[Claims] In a transfer-type image recording device that sequentially performs recording processes by electrostatic recording or electrophotography according to the movement of an endless belt-shaped recording medium, the belt unit is made into a cassette and has a structure that can be detached and attached together with the developing unit. An image recording apparatus characterized in that an Evert unit and a developing unit are integrally fixed by means of a crank 1.