JPH07301964A - Image forming device - Google Patents

Abstract

PURPOSE:To improve the taking-out property of jammed paper and to enhance the safety of a carrying time by providing the pivotal point of a guide cover on the main body inner side of a carrying path side in a paper passing direction which does not cross the carrying path. CONSTITUTION:The pivotal point R for turning and supporting the guide cover 7a is provided on the main body inner side of the carrying path 6a side in the paper passing direction Z which does not cross the path 6a of the side surface of a main body 2. The pivotal point S for turning and supporting the guide cover 7b is provided on the main body inner side of the carrying path 6b side in the paper passing direction Z which does not cross the path 6b of the side surface of a paper supply unit 3. Since the covers 7a and 7b are turned in a horizontal direction shown by an arrow X with the points R and S as a center, the surface of the paths 6a and 6b are perfectly exposed when the covers 7a and 7b are opened. Thus, the transfer paper 5 jammed on the paths 6a and 6b can be easily removed. Besides, since the outside surface of the device does not project when the covers 7a and 7b are closed, the device is made compact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a PPC, a fax machine, a printer, etc. having a guide cover which can be opened and closed.

[0002]

2. Description of the Related Art In a conventional image forming apparatus, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 63-90239, "Opening / Closing Mechanism of Copying Machine", the operation of removing transfer paper when a jam occurs is considered. In some cases, when the guide cover of the copying machine is opened, the surface of the transfer paper transport path is exposed to the operation side. Therefore, a conventional example of a structure in which the transfer paper transport path is exposed will now be described with reference to FIGS. Figure 6
The image forming apparatus 1 is composed of a main body unit 2 on which an image is formed, and a paper feed unit 3 arranged below the main body unit 2. On the front surface of the paper feeding unit 3, a paper feeding tray 4 containing the transfer paper 5 is provided in a plurality of stages. Conveyance paths 6a and 6b for conveying the transfer paper 5 in the vertical direction (sheet passing direction Z) from the paper feeding units 3 to the main body unit 2 side are provided on the side surface of the image forming apparatus 1. There is. This transport path 6a,
The guide covers 7a and 7b that cover the surface of 6b are supported by rotation fulcrums P and Q located below the units 2 and 3, respectively, and are lower fulcrums that are rotatable along the sheet passing direction Z. It is openable. Further, as shown in FIG. 7, a base 8 having a transfer paper passage opening 8a for transferring the transfer paper 5 between the transfer paths 6a and 6b is attached to the bottom surface of the main body unit 2. There is. The guide cover 7
Also on the a, 7b side, a transport member (not shown) facing the transport paths 6a, 6b is attached. In the image forming apparatus having such a vertical conveyance structure, the guide covers 7a and 7b cover the surfaces of the conveyance paths 6a and 6b during normal image formation. As a result, the transfer paper 5 fed from the paper feed tray 4 advances from the transfer path 6b on the paper feed unit 3 side to the transfer path 6a on the main body unit 2 side via the transfer paper passage opening 8a on the base 8. Further, the image is carried into an image forming section (not shown) in the main body unit 2 and an image is formed.

[0003]

In the image forming apparatus having the guide covers 7a and 7b of the lower fulcrum opening / closing type (having the rotational fulcrums P and Q in the direction transverse to the sheet passing direction Z) as described above. When a jam occurs in the middle of the transport paths 6a and 6b, the guide covers 7a and 7b are opened to remove the jammed transfer paper 5.
However, the rotation fulcrums P and Q of the guide covers 7a and 7b are
The units 2 and 3 are mounted below the units 2 and 3 in the X direction, which is transverse to the sheet passing direction Z on the transport paths 6a and 6b. Thereby, as a method of removing the transfer paper 5 jammed between the transport path 6a near the rotation fulcrum P and the guide cover 7a, the transfer paper 5 is pulled up or pulled down. The transfer paper 5 may be stressed and damaged in some cases. If the minute pieces of the transfer paper 5 thus damaged remain in the transport paths 6a and 6b without being detected by the detection means (not shown), the transfer paper 5 is transferred to the remaining pieces in the next copying operation. Will be caught and will cause the jam to recur.

Further, as shown in FIG. 7, the main body unit 2
A transfer paper passage opening 8a for transferring the transfer paper 5 is formed in the base 8 attached to the bottom surface of the base paper. But,
As shown in FIG. 8, when a jam occurs in the area of the transfer paper passage opening 8a, the transfer paper passage opening 8a has an elongated shape and a narrow width. Therefore, it is easy to remove the jammed transfer paper 5. is not.

Further, as shown in FIG. 9, in the case of a desk-top type image forming apparatus, it is generally found that a handle 9 is attached to the bottom surface of the main body unit 2 as a transportation means, but depending on the user, the rubber is used. It may be possible to insert a hand into a space with a height of 10 minutes and carry it. In such a case, as shown in FIG. 10, there is a risk that the metal burr 11 at the end portion of the base 8 directly touches the user's hand and is injured.

[0006]

According to a first aspect of the present invention, a guide cover that is openable and closable is provided, and when the guide cover is opened, the surface of the feeding path of the sheet feeding unit and the main body unit is In the image forming apparatus exposed to the operation side, the rotation fulcrum of the guide cover is provided on the inner side of the main body of the path side in the sheet passing direction that does not traverse the transport path.

According to a second aspect of the present invention, in the first aspect of the present invention, a notch portion that is largely cut open toward the front surface is formed in the transfer paper passage area of the base attached to the bottom surface of the main body.

According to a third aspect of the invention, in the second aspect of the invention, the outer peripheral region of the end of the base mounted on the bottom surface of the main body is curled.

[0009]

According to the first aspect of the present invention, the guide cover is opened and closed in the lateral direction orthogonal to the sheet passing direction about the rotation fulcrum provided on the inner side of the main body of the side of the sheet feeding direction of the conveying route. To do. As a result, when the guide cover is opened, the entire surface of the transport path is exposed to the operating side, so that the transfer paper jammed on the transport path can be easily removed.

According to the second aspect of the present invention, even if a jam occurs in the transfer paper passage area of the base located in the middle of the conveying path, a cutout portion is formed in the transfer paper passage area and faces the front side on the operating side. Since it is cut open largely, the jammed transfer paper can be more easily removed.

According to the third aspect of the present invention, since the outer peripheral region of the end of the base is curled, the user does not directly touch the metal burr at the end of the end when carrying the main body. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The description of the same parts as in the conventional example is omitted, and the same parts are denoted by the same reference numerals. Figure 1
1 shows an example of an image forming apparatus having a vertical conveyance structure. A rotation fulcrum R for rotatably supporting the guide cover 7a is provided on the rear side of the main body on the side of the side of the main body unit 2 in the sheet passing direction Z that does not cross the conveyance path 6a. Similarly, a rotation fulcrum S for rotatably supporting the guide cover 7b is provided on the back side of the main body on the side of the path in the sheet passing direction Z that does not cross the conveyance path 6b on the side surface of the sheet feeding unit 3.
Is provided. In this way, the rotation fulcrums R and S are arranged in a direction parallel to the sheet passing direction Z, so that the guide covers 7a and 7b can be freely opened and closed in the lateral direction X that does not traverse the transport paths 6a and 6b. It has a structure that opens and closes the inner fulcrum.

Further, as shown in FIG. 2, the main body unit 2
In the transfer paper passage area A of the base 8 attached to the bottom surface of the base, a notch 12 that is largely cut open toward the front is formed. FIG. 3 shows a structure for increasing the strength of the base 8 having the cutout portion 12, and a front side plate 13 and a rear side plate 14 are attached to the plane portion of the base 8. In addition, in FIG. 4, the base 8 is the main unit 2
Is attached to the bottom surface of the base 8, and the outer peripheral region of the end 8a of the base 8 is curled over the entire circumference.

In such a structure, the guide cover 7
Since a and 7b rotate in the lateral direction X about rotation fulcrums R and S provided on the inner side of the main body on the path side of the conveyance paths 6a and 6b in the sheet passing direction Z, the guide covers 7a and 7b. When is opened, as shown in FIG. 5, the surfaces of the transfer paths 6a and 6b are completely exposed to the operation side. This is clearly different from the conventional state (see FIG. 6) in which the guide covers 7a and 7b traverse the sheet passing direction Z and the entire surfaces of the transport paths 6a and 6b are not exposed to the operating side. Therefore, from the above, in the apparatus including the guide covers 7a and 7b that rotate in the lateral direction X as in the present embodiment, the jammed transfer paper 5 on the transport paths 6a and 6b can be easily removed. You can Further, since the rotation fulcrums R and S are provided on the inner side of the unit main body, the guide covers 7a and 7
When b is closed, the outer surface does not project and a compact structure can be obtained.

Further, even if a jam occurs in the transfer paper passage area A of the base 8, a notch 12 is formed in the transfer paper passage area A and is greatly cut open toward the front side of the operating side. The converted transfer paper 5 can be easily removed. This makes it possible to further improve the take-out property of the transfer paper 5.

Further, since the outer peripheral region of the end 8a of the base 8 is curled, the metal burr 11 at the tip of the end 8a is housed inside the main body. This prevents the user from directly touching the metal burr 11 at the end of the end of the base 8 when carrying the main body unit 2, thereby reducing the risk of injury and further improving work safety. it can.

[0017]

According to the first aspect of the present invention, a guide cover which can be opened and closed is provided, and by opening the guide cover, the surfaces of the sheet feeding unit for feeding the transfer sheet and the feeding path of the main body unit are exposed on the operating side. In the image forming apparatus that
Since the rotation fulcrum of the guide cover is provided on the inner side of the main body of the side of the sheet passage direction that does not traverse the conveyance path, when the guide cover is opened, the guide cover is oriented in the sheet passage direction of the conveyance path. Is not traversed, and the entire surface of the transport path is exposed on the operating side. As a result, it is possible to provide a compact image forming apparatus in which the take-out property of the jammed transfer paper is improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the transfer paper passage area of the base mounted on the bottom surface of the main body is formed with a notch that is largely cut open toward the front. Even if a jam occurs in the passage area, the transfer paper can be easily removed, and thus the take-out property of the transfer paper can be further improved.

According to a third aspect of the present invention, in the second aspect of the invention, since the outer peripheral region of the end of the base attached to the bottom surface of the main body is curled, the end of the base is carried when the user carries the main body. There is no direct contact with the metal burr at the tip of the part, which further improves the safety of maintenance work.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an image forming apparatus that is an embodiment of the present invention.

FIG. 2 is a plan view of a base.

FIG. 3 is a perspective view showing a state in which a base is incorporated into front and rear side plates.

4 is a cross-sectional view taken along the line aa of the base of FIG.

FIG. 5 is a perspective view showing a state in which a jam has occurred near the transfer paper passage area of the base.

FIG. 6 is a perspective view showing an example of a conventional image forming apparatus.

FIG. 7 is a plan view showing the shape of a conventional base.

FIG. 8 is a perspective view showing a state in which a jam has occurred near a transfer paper passage area of a conventional base.

FIG. 9 is a perspective view showing how a conventional main unit is transported.

10 is a cross-sectional view taken along the line bb of FIG. 7 showing a conventional base shape having a metal burr at the end.

[Explanation of symbols]

 2 Main body unit 3 Paper feed unit 5 Transfer paper 6a, 6b Conveyance path 7a, 7b Guide cover 8 Base 8a End 12 Cutout A Transfer paper passage area R, S Rotation fulcrum Z Paper feed direction

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area G03G 21/16 // B65H 7/06

Claims (3)

[Claims] 1. An image forming apparatus, comprising an openable and closable guide cover, wherein a surface of a feeding path of a sheet feeding unit for feeding a transfer sheet and a main body unit is exposed to an operating side by opening the guide cover. An image forming apparatus characterized in that a pivot fulcrum of the cover is provided on a rear side of a main body of a side of a path in a sheet passing direction that does not cross the conveyance path. 2. The image forming apparatus according to claim 1, wherein a cutout portion that is largely cut open toward the front surface is formed in a transfer paper passage area of a base attached to the bottom surface of the main body. 3. The image forming apparatus according to claim 2, wherein a curling is applied to an outer peripheral region of an end portion of a base attached to the bottom surface of the main body.