JPH0452656A - Image forming device - Google Patents

Abstract

PURPOSE:To enable one-hand attachment and detachment using a grip, to use the grip as a guide for a recording medium, and to prevent jam occurrence by fitting the grip rotatably above a unit at specific height. CONSTITUTION:The grip 15 is formed in a U shape, the length to the fitting positions of the tip parts of both the sides is made a specific size shorter than the distance from the top surface of the unit 14 to the fitting positions, and the outside parts of the tip parts of both the sides of the U shape are fitted rotatably to plural support plates 17. When the unit 14 is attached or detached, the grip 15 is rotated upward and gripped in one hand to lift the unit 14, thereby detaching the unit. When the grip 15 is not used, the grip 15 is rotated down ward. Then a gap of specific size is formed between the top surface of the unit 14 and the bottom surface of the U shape of the grip 15f as the guide for the recording medium 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] This invention relates to an image forming apparatus in which a handle is rotatably provided in the longitudinal direction of the upper surface of the unit when the photosensitive drum and the developing section are integrated or individually unitized. The unit with an integrated developing section or each individual unit can be attached and detached with one hand using the handle, improving operability and contributing to miniaturization of the device.Furthermore, the handle can be used as a guide for the recording medium. The purpose of the present invention is to provide an image forming apparatus that can prevent troubles such as paper jams, and to develop an electrostatic image formed by scanning an image forming body and light irradiated from a light source onto the image forming body with toner. As one unit,
Alternatively, each may be constructed as a unit and detachably mounted, and the toner image formed on the image forming body is transferred to a recording medium that is conveyed in contact with the upper direction of the image forming body, and the transferred toner image is fixed. An image forming apparatus that feeds out a recording medium by means of a plurality of supporting plates that are provided opposite to each other at a distance greater than the width through which the recording medium passes on the upper surface of the unit in the width direction with respect to the conveyance direction of the recording medium. The outer ends of both sides of the U-shaped handle are rotatably attached to the handle, and the length of the handle is the same as the length from the top of the unit to the attachment position of the ends of both sides. The configuration is such that the distance is shorter than the distance by a predetermined dimension.

[Industrial application field]

The present invention relates to an image forming apparatus such as an electrophotographic printing apparatus, and more particularly, to an image forming apparatus such as an electrophotographic printing apparatus, in which a handle is rotatably provided in the longitudinal direction of the upper surface of the unit when a photosensitive drum and a developing section are integrated or individually formed into a unit. The present invention relates to a forming device.

In recent years, with the development of office automation, there has been an increasing demand for character image information output devices that can use plain paper, have low noise, and produce beautiful prints.

For this reason, copying machines, facsimile machines, etc. that utilize electrophotographic technology have been provided, but due to the demand for miniaturization and ease of handling, the photosensitive drum and developing section are integrated into a unit, or each is made into a separate unit. Therefore, devices have been put into practical use in which each unit is attached and detached for maintenance or the like, and each unit is replaced when the photosensitive drum reaches the end of its life or the toner tank of the developing section runs out of toner.

In such a device, a mechanism is desired that can further improve the operability of attaching and detaching the unit.

[Conventional technology]

FIG. 5 illustrates an internal side view of the electrophotographic printing apparatus. In the figure, 1 is an optical scanning section, 2a is a photosensitive drum, 3 is a cleaner, 4 is a charging section, 5a is a developing section, 6 is a transfer section, and 7
8 is a static elimination unit, 8 is a fixing unit, 9 is a conveyance path, 10a, 10
Reference numeral b indicates a paper feed section that accommodates recording paper 12a according to size, and reference numeral 11 indicates a stacker.

With this configuration, when the power of the apparatus is turned on, the fixing roller R1 in the fixing section 8 is heated to a predetermined temperature by the heater lamp 80, and becomes ready for printing.

Then, based on the print instruction signal, the recording paper 12a of the specified size is moved from either the paper feed section 10a or 10b to the arrow A.
direction, and is conveyed along the conveyance path 9 and sent above the photosensitive drum 2a. By this time, the photosensitive drum 2a has been neutralized by the static eliminating section 7, the toner has been cleaned by the cleaner 3, and the photosensitive drum 2a has been charged again by the charging section 4.

Therefore, optical data irradiated from an optical scanning section 1a constituted by a laser light source or the like is scanned onto the photosensitive drum 2a.

The electrostatic image formed on the photosensitive drum 2a is developed into a toner image by the toner 52 supplied from the toner storage section 50 of the developing section 5a and attached to the developing roll 51, and then transferred to the transfer section 6.
After being transferred onto the recording paper 12a, the toner 5 is conveyed to the fixing unit 8 while being sandwiched between the fixing roller R1 and the pressure roller R2.
2 is heated and pressurized, fixed, and discharged. Note that the toner 52 is mainly composed of magnetic material powder, and is charged by stirring.

Further, in the apparatus, the upper lid part 13 above the conveyance path 9 is located at the rear.

The photosensitive drum 2a and the developing section 5 rotate upward about a support shaft (not shown) provided at the right end in the figure.
The upper part of a is open.

Furthermore, as shown in the conventional example (1) in FIG.
a, the cleaner 3, and the developing section 5a are integrated into a recording unit 14a, which is detachably set in the apparatus. Also, the developing section 5a of the recording unit 14a
Plate-shaped handles 15a and 15b are provided protruding from both ends of the upper surface of the housing 53 near the photosensitive drum 2a, and the recording paper 12a is passed between the handles 15a and 15b to the photosensitive drum 2a.
It is transported in the direction of a.

Therefore, when opening the top cover 13 and performing maintenance due to a malfunction, etc.,
When the toner 52 in the toner storage section 50 is used up, or when the photosensitive drum 2a has reached the end of its life due to scratches, etc., the upper lid section 13 can be opened, and the recording unit 14a can be attached/detached and replaced.

Furthermore, in the conventional example (2) shown in FIG.
In this method, a U-shaped handle 15c is provided on the top surface of the holder, and the holder can be attached and detached with one hand.

In the above example, the photosensitive drum 2a + the cleaner 3. This is the case where the developing section 5a is integrated into the recording unit 14a, but as a different unit configuration, as shown in FIG.
The photosensitive drum 2a and the cleaner 3 are integrated into a drum unit 14b, the developing section 5a is a developing unit 14c, and a plate-shaped handle 15 is provided on the upper surface of each housing 53a, 53b.
There is also an apparatus in which drum unit 14b and developing unit 14c are individually attached and detached by providing handles 15f and 15g.

Furthermore, there is also an apparatus configured such that the recording paper 12a is conveyed through the developing section 5a and the lower surface of the photosensitive drum 2a.

[Problem to be solved by the invention]

According to the conventional method described above, (1) In the method of conventional example (1), when the developing section or photosensitive drum, etc. is attached to or detached from the apparatus due to a failure or replacement, the recording unit, drum unit, and developing unit are attached and detached using a plate. It is necessary to hold the handles at both ends of the shape with both hands.
Furthermore, if the device must be attached or removed from the side, one hand must be inserted deep into the device, resulting in extremely poor operability. Further, there is a small space above the position where the handle is provided, but since there is no guide, when the recording paper is conveyed through that position, the recording paper may lift up and cause a jam.

(2) Conventional method (2) requires a space to put one's hand under the handle, which increases the dead space inside the device, making it difficult to miniaturize the device as required. Moreover, jam cannot be prevented.

There is a problem.

The present invention improves operability by allowing a unit in which a photosensitive drum and a developing section are integrated or each individual unit to be attached and detached with one hand using a handle, and contributes to miniaturization of the apparatus. Use it as a guide for
It is an object of the present invention to provide an image forming apparatus that can prevent problems caused by jamming.

[Means for Solving the Problems] Fig. 1 is a diagram showing the principle of the present invention, in which (a) is a side view and (2) is a front view. In the figure, 2 is an image forming body, 5 is a developing section,
12 is a recording medium; 14 is the image forming body 2 and the developing section 5 integrated or each independently; the recording medium 12 is the image forming body 2 and the developing section 5;
The unit 17 is formed to be conveyed in contact with the upper direction of the recording medium 12, and is opposed to the upper surface of the unit 14 in the width direction with respect to the conveying direction of the recording medium 12 at a distance larger than the width through which the recording medium 12 passes. The plurality of supporting plates 15 provided are formed in a U-shape, and the lengths of the tips of both sides of the U-shape up to the mounting position are set to be shorter by a predetermined dimension than the distance from the top surface of the unit 14 to the mounting position, This handle is rotatably attached to a plurality of support plates 17 on the outside of the ends of both sides of a U-shape.

Therefore, the unit 14 is configured to be attached to and removed from the device by holding the handle 15.

[Operation] When attaching or detaching the unit 14 to the device, rotate the handle 15 upward, grasp the handle 15 with one hand, and lift the unit 14 to attach or detach.

When the handle 15 is not used, the handle 15 is rotated downward. Then, a gap of a predetermined size is created between the top surface of the unit 14 and the U-shaped bottom surface of the handle 15, which can serve as a guide for the recording medium 12.

In this way, the handle 15 improves operability when attaching and detaching the unit 4, and by lowering the height when the handle 15 is not in use, it is possible to reduce the space and downsize the device. Furthermore, by guiding the recording medium 12, jamming can be prevented.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 and 3. The same reference numerals indicate the same objects throughout the figures.

Photosensitive drum 2a+recording paper 12a in FIG.

Recording unit 14a1 handle 15h and support plate 17a,
17b is the image forming body 2. of FIG. 1(a). Recording medium 12.
The unit 145 corresponds to the handle 15 and the support plate 17, respectively.

FIG. 2 shows a configuration diagram in which the present invention is applied to the electrophotographic printing apparatus described in the conventional example. FIG. 2(a) is a side view, and FIG. 2(b) is a perspective view of essential parts.

As shown in FIGS. 2(a) and (b), the photosensitive drum 2a
+Cleaner 3. and a unit that integrates the developing section 5a.
14a is housed in a housing 53, and the upper surface of the photosensitive drum 2a is opened to expose a portion of the photosensitive drum 2a.

The photosensitive drum 2a is placed on the upper surface of the housing 53 above the developing section 5a.
Support plates 17a and 17b of a predetermined height are attached to opposing positions in the width direction of the conveyed recording paper 12a at an interval wider than the width of the recording paper 12a, and have shaft holes 18a and 18b in their upper ends, respectively. is provided.

Further, spindles 19a and 19b are provided on the outside of the tips of both sides of the U-shaped handle 15h.
b is rotatably supported in shaft holes 18a, 18b of support plates 17a, 17b. The length Ll from the mounting surface of the support plates 17a, 17b to the support shafts 19a, 19b on both sides of the U-shape of the handle 15h is
It is set to be shorter by a predetermined length L3 than the length L2 up to 19b. (See Figure 3(a)) Also, when the U-shaped bottom of the handle 15h is rotated downward,
A chamfer 20 is provided on the outside of the bottom surface at least at the corner portions facing each other in the direction in which the recording paper 12a advances. (See FIG. 3(b)) With this configuration, when the recording unit 14a is installed in the apparatus, the handle 15h is rotated downward, and the recording paper 12a is rotated to the right in the figure. When the toner image passes through the upper surface of the housing 53 above the developing section 5a, it is guided by the chamfer 20 on the lower surface of the handle 15h and is conveyed without lifting, and the toner image is transferred onto the photosensitive drum 2a.

Also, when attaching or detaching the recording unit 14a to the device, use the handle 1.
It can be operated by rotating the handle 5h upward and grasping the handle 15h with one hand.

In this way, the recording unit 14a can be attached and detached with one hand, improving operability, and since the height of the handle 15h can be lowered by rotation, it is possible to achieve miniaturization without taking up space. Furthermore, when the apparatus is in use, the downwardly rotated lower surface of the handle 15h can be used as a guide for transporting the recording paper 12a, thereby preventing jamming.

In the above example, the recording unit 14a is provided with the handle 15h, but a different embodiment is shown in FIG.
17d and a handle 15i, and a developing unit 14c.
A similar effect can be obtained by providing support plates 17e, 17f and a handle 15j on the housing 53b. Drum unit 1
4b, support plates 17c and 17d are provided on the outer edge of the housing 53a in the longitudinal direction of the photosensitive drum 2a from above the pan lance at the center of gravity.

Although not shown in the drawings, as an application example of the present invention, in the case of an apparatus in which recording paper is conveyed below a photosensitive drum and a developing device for printing, the recording unit may be configured to be detachable, or the drum unit and Even when a developing unit is constructed, by providing the handle according to the present invention on the top surface of each unit, the effect of facilitating attachment and detachment can be obtained.

[Effects of the Invention] As explained above, according to the present invention, by rotatably attaching the handle at a predetermined height to the upper surface of the unit in which the image forming body and the developing section are integrated, or each individual unit, The handle allows for one-handed attachment and detachment, which improves operability and contributes to the miniaturization of the device.Furthermore, the handle can be used as a guide for the recording medium, preventing problems such as jams. be.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle of the present invention, Fig. 2 is a configuration diagram showing an embodiment of the invention, Fig. 3 is an explanatory diagram of the embodiment, Fig. 4 is a perspective view showing a different embodiment, and Fig. 5 is a diagram illustrating the embodiment. 6 and 7 are perspective views showing conventional examples (1) and (2). FIG. 8 is a perspective view showing different unit configurations. In the figure, 2 is an image forming body. , 5.5a is a developing section, 12a is a recording paper, 14a is a recording unit 14c is a developing unit 17 is a support plate, 2a is a flashing drum, 12 is a recording medium, 14 is a unit 14b is a drum unit, 15.15a to 15j are handles , (b) f + view of the handle, diagram (α) J Tomoe F upper C two B tan (b') grip'! Explanatory diagram of r and Shishidaji actual history j Fig. 3 2' image form A 5 transition image part 12, Kotoki (Todo certain work 14, l 2 1. fact 15j Tomoe j 7 Shikikari Sori of non-invention 2 Fig. 1 (Illusion and charm diagram of non-invention) Fig. 2 (Zone 1) A perspective view showing an interesting example Fig. 4 Electronic photocopy Mouth weight 1 Bo 11's internal flight 11 view Figure 5 record 7 to 14 α Conventional Italian 1 (1) and Hosu Saji Eigen No. 6 A 71 Nope 5 1!!! To the 522/Soto structure Fig. 3

Claims (1)

[Scope of Claims] 1) An image forming body (2) and a developing section (5) that develops an electrostatic image formed by scanning the image forming body (2) with light irradiated from a light source with toner are integrated. or as a unit (14) each independently and detachably attached to the image forming body (14).
The toner image formed in step 2) is transferred to a recording medium (12) that is conveyed in contact with the upper direction of the image forming body (2), and the transferred toner image is fixed to fix the recording medium (12). The image forming apparatus is configured to face an upper surface of the unit (14) in the width direction with respect to the conveying direction of the recording medium (12) at a distance greater than a width through which the recording medium (12) passes. The outside of the tips of both sides of the U-shaped handle (15) is rotatably attached to a plurality of support plates (17) provided in the U-shape. An image forming apparatus characterized in that the length of the tips of both sides of the character shape up to the attachment position is shorter by a predetermined dimension than the distance from the top surface of the unit (14) to the attachment position. 2) A corner portion on the side where the recording medium (12) is conveyed when the handle (14) is rotated and lowered between the support plates (17) is chamfered. The image forming apparatus according to claim 1.