JPS5811964A - Object detecting device - Google Patents

Abstract

PURPOSE:To detect objects including light transparent objects by mounting an air flow generating part on an object carrying or moving passage and fitting an element for detecting the chang of air flow of an air flow passage to detect the arrival or passage of these objects. CONSTITUTION:Plural grippers 24 are arranged to the periphery of a transfer roller 33 and an opening 334 of an air flowing hole 333 passed from the external periphery to the direction of a rotational axis is drilled near the grippers 24. The other end of the rotational axis 34 is connected to a suction fan 37 by hoses. A hot wire e.g. is used as a detecting element, i.e., a tungsten wire 38 is stretched in an air flow passage inside the rotational shaft 34 of the transfer roller 33 and current is supplied to the wire 38 to heat it. When a transfer paper 201 is normally gripped, the whole wire 38 acts as high resistance during the rotation of the roller 33 and, in case of a gripping error, a part of the wire 38 between the gripping part and the transfer part is turned to low resistance, so that a light penetrating object also can be detected.

Description

[Detailed description of the invention] Unexploded Il & 11rt, evacuation or moving object Yokochi reward cover:
Person in charge.

For example, it is desirable to provide an appropriate material for use as a detection device for carriers (transfer paper, sheet paper, etc.) that interfere with transport in an image forming apparatus.

For example, in a copying machine such as Ashisha JIc, an image bearing member such as paper is transferred from a paper feed section such as a cassette to a static image forming section, a developing section, or a transfer group I: delivery 0 order C: toner of a carrying member. m"t-
g C on the carrier: constant increase, C2 on the tray discharged.

In this case, the image bearing member sometimes becomes jammed at the 66 portion of its transport and cannot be ejected.

The image carrier is still 1 in the reproduction barrel 6:a fc! When the device is operated, not only is the image carrier not ejected,
*Because of 1, 4'l is induced. Therefore, it is necessary to detect transport defects as early as possible. Therefore, in the general area, a passage detection device is installed on the conveyance path of the image carrier.

Predetermined time C: If it does not pass, copying is stopped and the accident is investigated and stopped.

The detection method is to use the lever from the image carrier C2!
III. However, there is a mechanical method for making microswitches, etc., by which the light source and the light receiving element are faced across the conveyance path, and the image bearing member passes through. A method or a method of detecting the afUf source and the receiving IN element by arranging them in the same manner as in the case of the above-mentioned light 4@- have been devised and utilized.

However, the method using light transmission is ineffective when using a translucent carrier such as paper.

On the other hand, the mechanical method and the super f[I: translucent carrier 1; 41 Conveyance mode in which the carrier is placed on a supporting part such as a cylindrical row 2, a circular drum, or an endless belt.
It is difficult to use the support member because it is difficult to mechanically detect the presence or absence of a thin layer like paper. With the belt, it is difficult to pass fJ- even if the belt t screen is folded 62 times.Specially if the mesh of the second screen becomes finer, the passing rate of super f becomes worse. f
The detection device using a box is 66 degrees higher than the previous optical type 1 and mechanical reliability tC2. lf No. 1 = Always ≦ = 1 even for objects as large as sheets or film that are being transported while taking care of the kidneys
:Low-cost object detection device with a sensible configuration
The transport or movement route section of the object is provided with an air flow generation section, the air flow path 1 is provided with a rope for detecting changes in air flow, and the air flow generation section ζ2 is connected to the 6 objects. The arrival of an object is detected by the change in airflow as it passes. The gist of this paper is an object detection device with special ridges.

In the following uninvented 'a1 intelligent detection fk color copying machine, it is detected whether the leading edge of the transfer material has reached the grip part I of the transfer row 2 or not! When used as A-director, t911g and concrete C: Explain.

(Electrophotographic feeling) "With Mudram, axis 2C two rotations freely I
: Direction of arrow 6 from supported copy direction C: Rotation t
When the drum 1 rotates to the normal position, the original O placed on the gas plate 2 is illuminated by the illumination lamp 6 which is integrated with the first scanning mirror 5.

The reflected light is reflected by the second moving mirror 7. 6:J: The first traveler M2-5 and the second traveler J-7 must move at a speed ratio of 1:1/2. A set meal of manuscripts is served while the manuscripts are left hanging.

The reflected original image passes through a lens 8 and a third ξ gee 9, and then is color separated by a color separation filter 105 ni.

Further C: After passing through the fourth mirror 11 and anti-vandalism can closing glass 12', it is placed on the drum 1 at the base A 16.

The drum 1 is neutralized by a static eliminator 14 and charged (eg, positive) by a primary I secondary band 15.

Image t irradiated by the illumination 2 lamp 66 in the exposure section 16
Slit exposure. At the same time, 62 AC or - # electricity of the opposite polarity (for example, negative) is applied using the static eliminator 16,
After that 6: Omnidirectional happy light lamp 17 + 2 full surface 4) Qt
: A high-contrast static 1ita image is formed in Yoridosum 1.

The static image on the photosensitive drum 1 is converted into a toner image by the next step C: Development 418C2. The developer 18 is yellow 181. Magenta 182. Cyan 186 and $18
The color f is composed of the development 4 of 41d of 4, and the color f used in 4
J-screen filter I: A correspondingly designated developer operates to obtain a toner image of the required color.

The four sheets of paper 201 in the cassette 191 are fed directly to the paper feed row 2211, and the timing of gl@ is taken at the first register row 2221. At the appropriate timing, the tip of the gripper 24i of transfer@-255 is gripped. The 1# detail of the transfer roller will be described later, but the transfer roller 2
Rotation C of 55=Accordingly, the transfer roller 233 and the threshold of the photosensitive drum 1 are conveyed while wrapping around the roller 256 [transfer paper 20
1 passes C': the toner image on the drum 1 is transferred onto the transfer paper. The transfer row 256 is the gripper 24
While holding the leading edge of the transfer paper 201, the transfer paper 201 is rotated as required, and an image of the required number of colors is transferred.

The copy paper shown in the figure is made up of two cassettes loaded with transfer papers of different sizes and textures) t-ff! (If you don't know what to do with them, I'll show you how to feed them two times a day.)

After the transfer, the pig transfer paper is released from the gripper 24.

The sheet is guided to the conveyor belt 27 by the separation claw 26, then to a pair of constant layer rollers 28 and 29, fixed by pressure and heating, and then unloaded onto the tray 30. After the transfer, the photosensitive drum 1 is cleaned by a cleaning device made of elastic grade.
At t51, the surface 't<11 is swept and the first Iku height is 6
It's turning. 14 is a release for the front floor's frame! , is first-order f
δru in the tonki.

The transfer row 265 is 6
Then, the photosensitive drum 1 is pressed into contact with the photosensitive drum 1, and it rotates twice around the rotating shaft 64 in the same line. Transfer Ronia 36 outer circumference UkI! 712: For the transfer, a plurality of grippers 24 are arranged to grip the tip. Also, near the gripper 24, there is a 1L11 roller 1111 from the outer peripheral surface.
A nitrogen flow curved hole 363 (10364) is provided which leads to the J sword. And from FIG. 6, C: Transfer roller 33 (:
When the transfer paper 201 is 4 times N, open D! i54 is a sparrow.

Furthermore, transfer roller 5! In order to increase the transfer efficiency and to ensure that the transfer paper 201 is densely layered on the transfer roller 5, a bias voltage is applied to J+ from a 5-bias device [35 (Fig. 44) E2].

↓D In the case of a 4F4 configuration like mine, where the transfer paper 201 is gripped incorrectly at the grip section 40 (Fig. 4), the transfer paper 201Vi is not transported to the transfer position 41 and is placed below the grip section 40: Hiroshige 6 (shown by line A in Figure 4).

If such a grip error occurs, the rotation bias of the transfer roller 55 (if the magnetic pressure continues to be applied), the current trap on the drum 1 will be directly transferred to the transfer roller 55. 63 Upper C: Rolled 4 and stains the CT-fu. - When the missing transfer paper is gripped and the transfer roller 33 (two-wound)
2. To soil the back side (2. Therefore, the grip part 40I
= In this case, the tip of the transfer paper 201 is detected by the gripper 24C of the transfer roller 66,
If it is not gripped, the rotation of the transfer row 233,
It is necessary to immediately stop applying the bias voltage.

Therefore, in exceptional cases, an opening 354 for air intake is provided on the surface C of the transfer drum 35 near the above-mentioned ripper 24.
A hole 666 was provided extending from the opening 5 to the rotation axis 34t:n of 50-66. The eleven rotating shafts 64 are hollow, and -454□ (FIG. 5) is fanned out. Also, the rotating shaft 54
The above-mentioned hole 5551: At the corresponding position, there is a communication hole 641 which communicates the paper hole 364 with the inside of the rotary shaft 34 at an angle of 66 degrees, and the other end of the rotary shaft 64 is connected to the suction fan 57 by a hose 66.

When the suction fan 67 is activated and the communication hole 341 and the hole 355 in the transfer roller are aligned, air enters from the air suction opening '564, and the air flows inside the rotary shaft 54. However, if the transfer paper 201 is normally injected, the leading edge of the transfer paper 201 will blow through the air intake opening 334 (
(Figures 3 and 4), so communication fL541 and hole 5 in the transfer roller
Even if 63 match, air does not flow into the interior of the 2-rotation shaft 54 (
: No air flow occurs.

This is non-invention! i! Transfer paper 201 by sensing Mk of airflow
This is a device that detects grip errors. For example, a thermal attenuator can be used as the sensing element.

In other words, as shown in Figures 4 and 5, C: Rotation shaft 5 of transfer row 253
4 Tungsten wire 38t is stretched in the internal air flow path;
'Re I: Generate heat through the first stream. Then, the resistance of tungsten wire 3+8 increases. - 1: If you hit the air flow, the heat will be absorbed by the air, so the temperature will drop to 9.
．． resistance becomes smaller. This is extracted as a voltage change and suppresses the operation of the copying machine in the event of a grip error. Stopping the rotation of the transfer roller, canceling the bias, etc. t+l
l141'r.

The communication ratio 341 is set so that the gripper 24 matches the hole 655 in the transfer roller when the grip part 40 and the transfer part 41 are at the position t+2.

When the transfer paper 201 is gripped normally.

The heat d has a high resistance throughout one rotation of the transfer roller 65,
When there is a grip error, a low resistance C2 occurs in a part between the grip part and the transfer part.

In the above, when the communication hole 341 is connected in two parts of two rotations of the transfer roller, two ζ are used.
It's okay. In that case, except when the transfer paper is normally C-nigelipped, g! , air flow n, the hot wire has low resistance.

The explanation for more than 10,000 is the case I: It was one, but
Even in the case of speech bubbles, you can get results for your colleagues.

In addition, as a sensing element, a blade or the like that swings due to the external air flow of the hot wire is used, and even if a Hall Mizuko, Fotoishi Fupta, or micro switch is activated. Further, if the opening 534 is provided with the number of terms d, the total width in the direction of the rotation axis becomes 1: the detection distance NH+2 for whether normal C nigerip is performed over the entire width.

Figures 6 and 7 show C2 transfer belt 39t'' instead of transfer roller.
For 14 ft 4 & l two applied moths. Belt near the thumb gripper 24 (: Opening 4Zt is provided, and 1g1lt opposite the side of the transfer paper to be gripped = When a suction duct 42' is installed and the grip is missed, C double-line opening 42□
It is 643 degrees so that the energy flows through it.Of course, in this case, it can also be a blowout.In the figure, 43 is a transfer charger, and 44 is a transfer belt driving roller.

The fan for creating the airflow does not have to be part of the dedicated fan 37, but may be a part of the fan such as an air vent or an exhaust fan, and the blade is a transverse one.

The above describes the use of the transfer l in a copying machine≦2 as a device for detecting the arrival of the gripper part.1 The present invention is not limited to -nt=, but can be widely used as a device for detecting the arrival and passing sound of objects in each oak. Available. It can also detect transparent objects.

Surface C of conveying a thin sheet-like material: $6. It has a southern configuration and is low cost, such as 66, and is better suited to various types of
It has certain advantages t'', making it effective and suitable as an object detection device.

[Brief explanation of the drawing]

Figure 1 is a diagram of a row of color electrophotographic copying machines, Figure 2 is a diagram of the transfer roller, and Figure 6 is a diagram of the transfer roller.
``'cV%'' A slope view of the transfer roller. Figure 4 is a horizontal vR view of the transfer roller, Figure 5 is a vertical sectional view of the same, and Figures 6 and 7 are for the transfer belt. A side view showing 1 is a drum shop L body, 66 is a transfer roller, and 69 is a transfer belt. JP-A-58-11964 (6)

Claims (1)

[Claims] (1) Transportation or transfer of 1111 bodies ff1 (2g!,
An air flow generating section is provided, and an element for detecting air flow change is provided, and the air flow generation 1 fllt 2 and 6 proximal arrival formulas are 4g - With the accompanying air flow change, the arrival formula of the object is passing. Detect. An object detection device that targets t% enemies. L2) The object to be inspected is transferred to the 1111 carrier in the image forming apparatus I. Features ff-Claim A.