JPS5931983A - Image transferring device - Google Patents

Abstract

PURPOSE:To prevent an image from blurring regardless of environmental condition as much as possible, by displacing the recording body guide surface of a guide by the elastic force of an elastic body according to the rigidity of a recording body. CONSTITUTION:A developer image 37 is transferred onto copying paper 24 by the corona discharge of a transfer corona discharger 19. The guide 32 is so constituted that the elastic body 34 is provided on the guide plate 33, so when copying paper 24 such as a post card with large rigidity is used, the elastic body 34 is removed by the rigidity of the copying paper 24, which is guided to a position near a transfer point (a) on a photoreceptor 14; the copying paper 24 is guided without any slip and the disorder and jam of an image due to a shift in transfer point (a) are prevented securely. Further, when the copy paper 24 has small rigidity, the elastic body 34 is not removed by the rigidity of the copying paper 24, which is guided to a position distant from the transfer point (a).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image transfer device for use in image forming apparatuses such as electronic copying machines, ηj, -T printers, and the like.

[Technical background of the invention and its problems]

For example, in a double-image transfer device used in an electronic copying machine, as shown in FIG. A device in which the transfer is performed by corona discharge of a transfer corona discharger 5 is known.

By the way, there is a growing demand for the above-mentioned copy paper 4 to be diversified from paper specified by manufacturers to regular paper for official postcards. However, the copy paper 4 is guided by the guide plate 3 and comes into close contact with the photoreceptor 1 near the transfer point a.
If the position where the density is applied is too far from the transfer point λ, the copy paper 4 with high rigidity will be moved along the photoreceptor 1.
11. Because the transfer point cannot be transferred, it may cause scratches or scratches. This may cause image disturbances or paper jams.

Also, if the contact point is too close to the transfer point a, the corona discharge will be '+14. When the copy paper 4 hits the photoreceptor 1 in a dense area where the
I'll put it away at 7. Therefore, it has been proposed that an insulating layer 1'418 is provided in a part of the transfer corona emitting ICt device 5 to prevent the transfer before the copy paper 4 is intimately attached to the photoreceptor 1. However, with this method, the width of the transfer point a is small and there is little flow to the photoreceptor 1, so the temperature is
It is limited by environmental conditions such as 7 and humidity IQ'.

[Purpose of the invention]

Mu brother 111 Chen 1. Based on the above 41 circumstances (it was created by JI, its purpose and dimensions are to ensure that the jam is JI)
An image transfer device that can prevent image blurring as much as possible without being limited by environmental conditions. The purpose is to propose J.

[Summary of the invention]

The present invention provides image transfer in which a developer image formed on an image carrier is transferred onto a recording member guided by a guide by a transfer means provided opposite to the image carrier. ? 1. i'f k (Come, the above guide is provided with an elastic body, and the recording medium guide surface of the above guide is configured to be displaced according to the rigidity of the ink recording body by the elongation f'1 force of this elastic body. [- is the IP, 'i' sign.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 to 51. FIG. 3 shows an electronic first copying machine using the image transfer device according to the present invention, and numeral 11 in the figure is the main body. A document mounting table 12 is provided on the upper surface of the main body II.
and fL are V-shaped so as to be reciprocated by a motor 13 provided within the main body 11. Further, a photoreceptor 14 serving as a drum-shaped image carrier is pivotally supported approximately at the center of the main body 11 and is configured to rotate in synchronization with the document mounting table 12 . An exposure thread 17 consisting of a rung 15, a light transmitting body 16, etc. is provided between the photoreceptor 14 and the 1m document mounting table 12, and it irradiates the original on the document mounting table 12-A and emits the reflected light. The document image is formed by guiding the light onto the photoreceptor 14. From this image formation position to the rotational direction of the photoreceptor 14? 1) IIM number 'L% developer 18, rotation'q corona direction θPh, vessel 1..., removal 'fi'i, vessel 20.
The cleaner 21 and the charger 22 are oriented. There is a feeling at the bottom of the top 3 and 11) Y;
4 and the transfer corona group 'N> device 19.
5 is installed (8, the proximal end of the slot is connected to a paper feed unit 28 having a manual feeder ID 26 and a paper feeder 4C position 27, and the terminal end thereof is connected to a paper feed section 28 having a permanent attachment device 29 for paper ejection. It faces the tray 30. 31° 31 is a conveyance roller.

As shown in FIG. 4 and FIG. ~
A flat elastic body 34 equivalent to 110 is provided, and this elastic body 34 has an id plate 33 VC on the side opposite to the photoreceptor 14.
ri'1, and the photoreceptor 14 side is in a free state at least two shoulders higher than the ID plate 33 (e in the figure).
Ru. The recording medium guide surface 35 of the guide 32' is configured to be displaced in accordance with the rigidity of the copy paper 24 due to the elasticity of the elastic body 34. When the extension line of the elastic body 34 intersects with the photoconductor 14, the intersection point C between the extension line of the paper feed side side wall 36 of the transfer corona discharger 19 and the photoconductor 14 crosses the photoconductor 14. In the tangential direction at transfer point a/
J) At least 3 mm or more (dl1 distance in the figure).

Thus, the surface of the photoreceptor 14 is first charged by the band TI and the container 22, and then the charges are selectively erased by image exposure of the exposure system 17 to form an electrostatic latent image. Next, this electrostatic latent image is visualized by applying high-resistance magnetic toner by the developing device 18 (1), thus forming a developer image 37. This developer image 37 is fed from the paper feed section 28, guided by a guide 32, and transferred onto the copy paper 24 by corona discharge from the transfer corona discharger 19. At this time, since the guide plate 32 is provided with an elastic body 34 on a guide plate 33, in the case of a copy paper 24 with a large oka 11 degree, the elastic body 34 is the rigidity of the copy paper 24. Since the copy paper 24 is guided to a position close to the transfer point a on the photoreceptor 14 after being pushed away by It is possible to reliably prevent image distortion and jams (paper jams) due to misalignment. In addition, in the case of the copy paper 24 having a small stiffness, the elastic body 34 is attached to the copy paper 24.
Due to the rigidity of the photoconductor 1, the copy paper 24 is not pushed away.
Guide the transfer point from the transfer point a on 4 to the 1st position. In other words, V12 copy paper 2 due to the strong influence of the IL world with nine layers of corona force.
This means that it is always in close contact with the four photoreceptors 14. 1.
Therefore, the copy paper 24 is brought into close contact with the photoreceptor 14.
Since 1 Jil of developer material 37 is often transferred beforehand, smearing is likely to occur in the image. Moreover, It? at transcription point a?
Since the discharge current to the photoreceptor 14 does not decrease due to a decrease in ^, there are no restrictions on environmental conditions such as temperature and humidity.

Incidentally, the guide 32 may be constructed as shown in the 61st section 14 or as shown in FIG. 71. That is, the guide 32 shown in FIG. 6 [T1] is one in which a net-like elastic body 34 is provided on the guide plate 33, and has the effect of the above-mentioned actual MIi example rotary punch. Also,
The guide 32 shown in FIG. 7 has a tlζ configuration in which a concave portion 38 is provided in the inner plate 33 and an elastic body 34 is provided in each of the four portions 38. With this configuration, for example, the elastic body 34 can provide the effect of the ID plate and the four diameters without the recess 38 for the copy paper 24 that is thin and weak, and for the copy paper 24 that has the stiffness. l1llll sex leave 34 aside, part 4 38
By allowing the paper to pass through, paper passing properties can be improved.

〔Effect of the invention〕

As explained above, according to the present invention, in the image transfer device in which the image is transferred by the transfer means provided with one color, the guide has an elastic body, and this elastic force causes the upper rudder guide to move. Since the recording medium guide surface is configured to be displaced by -C according to the rigidity of the recording medium, it is possible to prevent jams by T.
Hashizawa no 1. It is possible to prevent image blurring without being limited by environmental conditions. It has a great effect.

[Brief explanation of the drawing]

2. Figure 1 shows the structure ψ diagram showing the conventional example, and Figure 2 is! ■Figure 1 shows the blurring of the image, Figure 3 is a sectional view showing an example of an electronic first E machine using image transfer 4 for mokugyo, Rabbit, 4
Id: A configuration diagram showing the image transfer device of the same example,
Figure 5: 1. Figure 6 and FA7 are perspective M diagrams showing other embodiments in which the rod of the same embodiment is the rod.4... Image J'IJ (sensitive body), 19... transfer corona discharger, 32... is ID, 34... elastic body,
35...17 inner surface, 37...Developer image. IR+Person Patent Attorney Takehiko Suzue 597 Figure 1 Figure 4 Figure 5 Figure 6 Procedural Amendment Document 1939 (Monday/Monday) Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Case Indication Special i! 11r+Sho 57-142446 No. 2, Name of the invention Image transfer device 3, Person making the supplement gJv Relationship with the matter Patent 1! 'M person (307) East Toshiba/lIIi Tunki Co., Ltd. 4, agent 6, Ura 11] subject 7, contents of extraction (1) Meihei 1st edition, 3rd E (No. 1
Receive lil J limit. If the position after [Follow C, Fig. 1 (-Oi C1 Copy to photoreceptor 1 & 4 to contact] is outside the corona irradiation area of the transfer roller 5, the image will smear. In the case, copy A4 (if 4 is I'A;I'41;,η''1, its stiffness (2 hence the transcription) 11 d)
Since the straight line t[ is maintained when touching the person tc, the contact position with respect to the photoconductor 1 is within the irradiation area (2) of the corona 11 and the photoreceptor 5. However, the copy h (4 is Thin, 11 (
If so, the copy paper 4 may be bent due to its softness, and the contact position with respect to the photoreceptor 1 may be shifted to the front than in the case of the above-mentioned thick paper. In order to prevent this, the upper guide plate 3 of the guide plates 3 can prevent the copy paper 4 from bending, but conversely, when cardboard is used as the copy paper 4, the The plate 3 deteriorates paper passing performance. ” to join. (2) Specific Confucianism, page 5, lines 15 and 18. “Guide plate 33” in line 19, To1 ￥ “F guide plate 33”
and old tl2. (3) After the phrase “arranged” in the 8th to 9th lines of Meiho 1 River, 6j4, there is a gap fi3 at “Furthermore, the exit I between the upper guide plate 39 and the external body 34” 〜35, one corner of the connection between the upper guide plate 39 and the elastic body 34 is 1j' g(tJ, 0
Set at ~5°). ”/J11 people. (4) Details, page 6, line 20, "Guide plate 3.71 to 1F no. 33" and 11
已1-ru. (5) Particular State, No. 71A, November 1911-ttx 20-1, not subject to the first restriction. " followed by [As mentioned above, it has been experimentally confirmed that by setting the deviation values of (+, c, f, and g), good results can be obtained by 1%." (6) Add "Guide plate 33" on page 8, line 3 of the detailed description to 1.
33”. (7) The drawing and Figure 4 will be corrected as shown in the attached sheet.

Claims (1)

[Scope of Claims] (]) It is a developer image formed on the carrier 1.
The upper image JT is placed on the recording body guided by the guide.
(j) The guide has an elastic PL body, and the elastic force of this elastic body causes the recording medium guide surface of the guide to perform recording. 4. It is configured to be displaced according to the rigidity of the body.
・Special image transfer device. (2) The elastic body is opposite to the image carrier (till is fixed, and the image carrier 11i11 is displaced at least two times n3
[The image transfer device according to claim 1]. (3) The elastic body has an elastic modulus equivalent to Clark's four claws of 90 to 110.
ii Image transfer device.