JPH05204197A - Opening/closing device for image forming device - Google Patents

Abstract

PURPOSE:To make the opening/closing radius of a door member small at the time of simultaneously opening/closing the two door members through hinge members when a front door is constituted by arranging plural door members at an aperture part having wide width as to an image forming device such as an electronic copying machine, etc. CONSTITUTION:When the front door 10 is constituted by arranging three door members 11-13 in a state where the aperture part of the paper feeding part 9 of the image forming device is closed, the door member 13 is supported through the hinge member 20 provided with a spring with respect to the door member 12. The hinge member 20 provided with the spring is constituted of the hinge member provided with the spring, and the door can be opened/closed by pressing the door member 13 in a direction where the aperture part is closed in the range of the space of the rotating radius of the door member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus such as an electronic copying machine for the purpose of inspecting a sheet feeding section and an internal apparatus.
Regarding a door member that can be opened and closed, in particular, a door member that opens and closes in a double door shape is configured by three or more doors,
The central one is supported via a hinged member with a spring on a door supported on the base of the main body frame,
The present invention relates to a door member that can be easily opened and closed.

[0002]

2. Description of the Related Art In an image forming apparatus such as an electronic copying machine, a front door is arranged on the front side of a main body frame of the apparatus, and the front door is opened to inspect the internal apparatus or the sheet conveying apparatus. Jam processing and the like can be performed. In a commonly used small-sized image forming apparatus, as the front door, a hinge portion is arranged at a lower portion of a main body frame of the apparatus so that one door can be opened. On the other hand, in a relatively large apparatus, as shown in Japanese Utility Model Laid-Open No. 61-135345, the front door is composed of three door members, and the central door is different from the side doors. Support via a hinge.

As an example of constructing a front door by the above-mentioned three door members, there is, for example, an electronic copying machine as shown in FIG. The electronic copying machine 1 shown in FIG. 8 is configured so that a drawing or the like can be copied using a large size paper such as A0 size paper. Is arranged so that large-sized paper such as roll paper can be fed from the paper feeding device 9. In the electronic copying machine 1, a document insertion section 5 and a document ejection section 6 are arranged above the main body frame 2 of the apparatus,
A discharge tray 7 is arranged above the document handling section, and a control panel 3 is arranged to control these devices.

In the electronic copying machine 1, a front door 10 is arranged in order to supply the roll paper to the paper feeding device 9, and the front door 10 has a structure as shown in FIG. Two door members 11 to 13 are provided. 3 above
Of the two doors, the right door 11 is openably and closably supported by the body frame via a base hinge 15, and the left door 12 is openably and closably supported by a base hinge 16. On the other hand, the central door 13 is supported by the one door 12 via the hinge 17, and the opening operation of the door 13 causes the end doors 12 to be simultaneously opened. There is. Then, the central door 13
Is swingably supported with respect to the end door 12, so that the floor area required for opening and closing the door can be reduced as compared with the case where the left door is constituted by one door member. It

[0005]

However, in the conventional front door constructed as a double door as described above, since the door member is made of sheet metal such as thin iron plate, the rigidity of the door itself is small. However, if another door member is supported by such a door member, there is a problem that the hinge of the connecting portion of the two doors does not work well. That is, when the central door member is supported by the base door member, the rigidity of the base door member is insufficient,
In some cases, the hinge that connects the two door members is affected by the deformation of the base door member, and the opening / closing operation cannot be performed smoothly.

When the central door is simply supported by a hinge, the door may be opened while being aligned with the base door, which causes a problem in operability when opening and closing the door member. There is a problem that it is easy to do. Also,
Even when the door is closed, it is necessary for the operator to manually close each of the door members. Therefore,
In a device such as a large-sized electronic copying machine, the strength of each door member constituting the front door is improved so that the door can be easily opened and closed. If the value is increased, the door member becomes heavier and the weight of the apparatus is greatly affected.

[0007]

SUMMARY OF THE INVENTION The present invention solves the problem of the front door in the conventional large-sized image forming apparatus as described above. When configuring the, the central door member is supported via a hinge member with a spring,
It is an object of the present invention to provide a front door that prevents the central door from interfering with the opening of the door and facilitates opening and closing operations.

[0008]

SUMMARY OF THE INVENTION According to the present invention, an openable and closable door member is arranged on a side portion of a main body frame of a device such as an electronic copying machine, and the door member is opened to open a paper feed unit or an internal unit. The present invention relates to a door member configured to inspect each device arranged in. In the front door of the present invention, the left and right door members are configured as asymmetrical objects having different sizes, and the door member is configured to be openable and closable in a double door shape, and one door member is ,
With respect to the door supported by the main body, another door is supported via a hinge provided with means for urging the door in the closing direction.

As described above, by supporting the central door member with respect to the end door member via the hinge member with the spring, when the central door member is opened, The door does not get in the way, and the floor area occupied when opening and closing the door member can be reduced.
Also, since the central door is always biased in the closing direction by the hinged member with spring, even if the strength of the end door is insufficient, a large moment should be applied to the end door. There is no problem, and the positioning can be easily performed when closing the door.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An opening / closing device for an image forming apparatus according to the present invention will be described with reference to the illustrated example. The example shown in FIG. 1 shows the case of the front door 10 arranged at the front portion of the sheet feeding device in the image forming apparatus as shown in FIG. It is composed of two door members. The three door members are the door members 11 and 12 respectively supported on the body frame via the base hinges 15 and 16, and the central door member supported on the door member 12 via the hinge. 13 and 13. Further, handles 18 are provided on the three door members respectively, but a blind member 19 can be attached to the handles that are not used for opening and closing the door members so as to prevent the operator from performing an erroneous operation.

In the front door shown in FIG. 1, when all the door members are opened, the result is as shown in FIG. As shown in FIG. 2, one door member 1
1 is supported by the body frame via base hinges 15 and 15a, and the other door member 12 is supported by the body frame via base hinges 16 and 16a. On the other hand, the door member 13 at the central portion is provided with the hinge members 20, 20a, 20b with springs with respect to the door member 12.
The door member 12 is supported via the door member 13 and the door member 12 can be simultaneously opened by opening the door member 13. As shown in FIG. 2, in the three door members 11 to 13, the widths of the doors are set as Ha, Hb, and Hc, respectively, and the width is Hb for the door member 12 having the width Hb.
The door member 13 of c is supported.

In the front door of the present invention, as shown in FIG. 2, a mechanism for supporting the central door member 13 with respect to the door member 12 at one end is shown in FIG. Thus, a mechanism for supporting the central door member 13 with respect to the other door member 11 can also be used. As described above, supporting the center door member 13 with respect to any side door member allows the door to be widely opened depending on the installation location of the electronic copying machine, and the door of the apparatus can be opened. This is to prevent the operability from being affected by other devices. Therefore, when there is a margin on one side with respect to the place where the electronic copying machine is installed, a method can be adopted in which the central door member is opened with respect to the margin. .. Further, also in the door member shown in FIG. 3, a blindfold member can be attached to a handle of the door which is not touched by an operator when opening and closing.

As described above, the base hinge can be formed in the portion supporting the door member with respect to the main body frame, similarly to the hinge member provided in a general electronic copying machine or the like. On the other hand, the hinge for supporting the central door member with respect to the side door member can be configured to have a mechanism as shown in FIG. 4, for example. Hinge member 2 with spring shown in FIG.
0, like the generally used hinge member, has two hinge plates 21 and 22 that are swingable with respect to each other via a shaft 23. The spring member 25 is arranged and the spring 25
Thus, the two hinge plates 21 and 22 are urged in the closing direction via the shaft 23.

Then, as shown in FIG. 5, the hinge member with spring 20 is connected to the two door members 12, 13.
In the case of arranging it between the two, the central door member 13 is provided so as to be biased in the arrow direction via the hinge shaft with respect to the side door member 12. As shown in FIG. 5, by urging the door member 13 toward the door member 12 in the closing direction, the front door of the present invention is
As shown in FIG. 6, the door members 11 and 12 on both sides are opened via respective hinges, and the door member 12 is opened via the base hinge by opening the door member 13. become. When the door member 12 is opened, the handle of the door member 13 is held and pulled out from the main body frame, so that the hinge member 20 with the spring is opened.
The door member 12 is opened via the door member 12, but at that time, the door member 13 is bent with respect to the door member 12 by the spring force provided to the spring-attached hinge member,
Can be opened.

As shown in FIG. 6, in the front door of the present invention, when three door members are opened, one door member 11 has a turning radius corresponding to its width Ha (shown in FIG. 2). I need. On the other hand, the door members 12, 13
On the side of the two doors, the length Hb of the two door members is
And Hc are not added to the turning radius R1 and the door member 1
The door can be opened according to a turning radius R corresponding to a width Hb of 2. Further, the door member 13 supported by the door member 12 is a hinge member 2 with a spring.
Since it is urged in the counterclockwise direction in FIG.
3 is in a state of being swung in the closing direction toward the main body frame. Therefore, the door member 13 is projected outward from the turning radius of the door member 12, the turning radius does not become R1, and opens within the range of the turning radius R corresponding to the width Hb of the door member 12. be able to.

Further, as shown in FIG. 6, the hinge member 2 with a spring is provided between the two door members 12 and 13.
Even when 0 is arranged, the door member 12 supported via the hinge of the base bears the weight of the door member 13, and therefore a force for bending the door member 12 in the direction indicated by the solid line in FIG. 7 acts.
However, in the door member 12 of the present invention, as shown in FIG. 2, three hinge members with springs are arranged between two door members, and the springs provided in the respective hinge members with springs cause the door member to move. 13 is biased in one direction. Therefore, it is possible to prevent the door member 12 from being greatly curved as shown by the phantom line in the state where the door member 13 is in a state of reinforcing the door member 12 by using the force of the springs. it can.

When a means for supporting the central door member 13 via the spring-equipped hinge member 20 with respect to the door member 12 supported via the base hinge 16 to the main body frame, the spring is used. The rigidity of the door member can be assisted by utilizing the biasing force of the spring of the attached hinge member. Further, as shown in the above embodiment, in addition to the case of using three door members, it is also possible to use means for supporting different door members for the side door members, The structure of these door members can be arbitrarily configured according to the width of the device such as an electronic copying machine. Further, as the hinge member with a spring used for connecting the door member of the present invention, as long as a general hinge member is provided with a biasing means by a spring, an arbitrary one can be used. As a spring member, any spring means other than the torsion spring can be used.

[0018]

Since the opening / closing device of the image forming apparatus of the present invention is configured as described above, for example, when three door members are combined to form a front door, the door member at the central portion is used. Can be supported to the end door member via the hinge member with spring.
Even when the central door member is opened in a state of being supported by the side door, the central door does not get in the way and the floor area occupied when opening and closing the door member can be reduced. Also, since the central door is always biased in the closing direction by the hinged member with spring, even if the strength of the end door is insufficient, a large moment should be applied to the end door. Without
Positioning can be easily performed when closing the door.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a front door of the present invention.

FIG. 2 is a front view showing a state in which a door member is opened.

FIG. 3 is a front view of another embodiment of the arrangement relationship of door members.

FIG. 4 is a perspective view of a hinge member with a spring according to the present invention.

FIG. 5 is an explanatory diagram of a state where door members are connected using a hinge member with a spring.

FIG. 6 is an explanatory diagram of an open / closed state of a door member according to the present invention.

FIG. 7 is an explanatory diagram showing a state in which a side door member is bent.

FIG. 8 is an explanatory diagram of an arrangement state of a front door in a general electronic copying machine.

FIG. 9 is an explanatory diagram of an open / closed state of a door member in a conventional front door.

[Explanation of symbols]

1 electronic copying machine, 9 paper feeding device, 10 front door, 11 to 13 door member, 15 and 16
Base hinge, 18 handle, 20 hinge member with spring, 21/22 hinge plate, 23 axis,
25 springs.

Claims (1)

[Claims] 1. A door member that can be opened and closed is arranged on a side portion of a main body frame of a device such as an electronic copying machine, and by opening the door member, it is possible to inspect each device arranged in a paper feed unit or inside. In the device configured as described above, the door member is composed of asymmetrical members on the left and right sides, and the door member is configured to be openable and closable in a double door shape. Against
An opening / closing device for an image forming apparatus, wherein another door is supported via a hinge provided with a means for urging in a closing direction.