JPS5821755A - Image forming apparatus - Google Patents

Abstract

PURPOSE:To obtain an image forming apparatus, such as electrophotographic copying machine or a recording apparatus, prevented from unexpectedly shutting of the opening of the main apparatus when an operator tries to remove jammed paper by putting in his hand through the opening. CONSTITUTION:An upper unit 3 is provided with a stay 12 rotatable around a shaft 13. Since this stay 12 is energized on the projected edge 12A in the direction A with a spring 15 fixed to a pin 14, its other edge 12b touches the side of a stopper 16 on the bottom plate 11 of a lower unit 4 when the upper unit 3 of the main body 1 of a copying machine is opened. When an operator tries to push down the unit 3 at this sate to close it, the stay 12 comes into contact with the lower face 16c of the stopper 16 and its vertical part 16d and hinders the turn of the unit 3, and further, since the stay 12 bends protruding in the opening direction of the unit 3, and the upward reaction force acting on the stay 12 produces rotational moment in the direction B, the unit 3 is never shut unexpectedly by deviation of the stay 12 in the direction C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus such as an electrophotographic copying machine or a recorder. More particularly, the present invention relates to an image forming apparatus whose main body can be divided into a first main body and a second main body.

Hereinafter, an electrophotographic copying apparatus whose straight body can be divided downwardly from -E will be described in detail.

2. Description of the Related Art Conventionally, some electrophotographic copying apparatuses have a structure in which the main body of the apparatus is divided into two parts so that one can be moved upward and downward in order to deal with paper jams and the like. In such conventional devices, a torsion bar is used to maintain the open state of the device body. However, when the torsion bar is used to maintain the open state of the device body, the opening of the main body may cause other operators to close the device or they may not be able to see the lifting member directly. Sometimes I feel anxious about having to manually remove jams. □Therefore, the present invention provides an Ill11 body forming device that prevents the main body from being closed inadvertently and also provides a sense of security when dealing with jams.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

In the figure, 1 is the main body of the copying machine. Further, the upper unit 4 of the 3tJ copying machine is a lower unit, an 8Fi sensitive drum, which is pivotally supported on the upper unit 3 by a shaft 8a. Moreover, it rotates around the L=knit 3IIi hinge, is lifted up by the toshi lift member 6-7, and when it reaches the peak of summer shown in FIG. 1, it hits a stopper (not shown) and is prevented from rotating. Note that when the copying machine is closed, the hook 9 of the upper unit 3@ is locked to the receiver 10 of the lower unit 4@.
The upper unit 3 #i is fixed to the lower unit 4 in the closed state. Here, a stay 12 that is rotatable about a shaft 13 is attached to the upper unit 3. This stay 12 has its protrusion 412a urged in the entry direction by a spring 15 fixed to the bottle 14, so that the copying machine main body 1
When the upper unit 3 is open, the other end 12
b#i It is in contact with the body surface of the stopper 6 on the bottom plate 11 on the lower unit side.

At this time, a gap 16 is provided between the lower surface of the stopper 6 and the lower end 12b of the stay 12 so that the stay 12 can freely rotate.
It has an upper 9 slope 'lI & 16b facing from the direction of track arrow C to the direction of B. Therefore, when the upper unit 3 is pushed down in order to close it in this state, the stay 12 is pressed against the lower surface 16c of the stopper 16.
and the vertical portion 16d to prevent its rotation, thereby preventing the upper unit 3 from being inadvertently closed. At this time, since the stay 12 is curved with the opening direction of the upper unit 6 as a convex part, the upward reaction force acting on the stay 12 generates a rotational moment in the B direction, so the stay 12 comes off in the C direction. The upper unit 6 will not be closed inadvertently. Further, since the stay 12a% can be provided near the end of the opening of the main body 1, it is very conspicuous, and even an operator who attempts to close the stay without knowing the existence of the support means can immediately notice the existence of the stay.

Also, since it is located near the end, no unreasonable force is applied to the stay 12.

Next, the operation when closing the upper unit 6 will be explained in detail.

If the stay 12 is at the position indicated by the solid line, it is impossible to close the copying machine for the reason described above, so the operator must release the stay 12 when closing the upper unit 6.

Here, the lower unit 4 is provided with a latch 17 in the rotation path of the stay 12 with its opening facing the surrounding path. Therefore, the stay 12 can be rotated in the direction C, and the stay 12 can be held by the launch 17 as shown by the two-dot chain line. This latch 17 is made of a spring material, as shown in 2-, and has a U-shape that is once narrowed between both ends (hereinafter referred to as narrow portion 17e). Therefore, the stay 12 that passes through the narrow portion 17e against the spring force of the launch 17 and reaches the surrounding portion 17f is not released from the latch 17 due to the force of the spring 15 and the stay 12's own weight. When the stay 12 reaches the state shown by the two-dot chain line in Figure sg1, that is, the stay 12 passes through the narrow part 17e of the latch 17, reaches the U-shaped enclosure 17f, and is held in this enclosure wlyt. When this happens, the upper unit) 3#i has no support and can be lowered freely.

Therefore, when closing the upper unit 3, the operator must
2 from the solid line position in FIG.
Rotate it to the dotted line position where it is held. At this time, if the force of the springs 6 and 7 is made sufficiently large, the upper unit 6 will not descend and it will be safe.

Then, as shown in Fig. 6, unit 6
7 and hits the bottom plate 11, and as the upper unit 3 rotates in the D direction, it then slides outward on the bottom plate 11, and when the upper unit 3 is completely lowered, that is, the receiver 10
The position shown by the solid line in FIG. 4 is reached with the hook 9 locked. Therefore, when closing the upper unit 3, the operator cannot move it.

Furthermore, when opening the upper unit 3, the engagement between the hook 9 and the receiver 10 is released by grasping the handle (not shown), and when the upper unit 3 is released, the center of the shaft 13 is set on the trajectory of the dashed line. , and the stay 12 moves along with it, but when it is pulled by the spring 15 and released, it reaches the position shown by the solid line in FIG. During this time, the stay 12 moves at a location lower than the launch 17, so the stay 12 does not engage with the latch 17.

According to the embodiments described above, it is possible to provide a copying machine in which the upper unit filter does not close inadvertently when it is in the open state, and the upper unit can be easily closed when the upper unit is closed.

In the above embodiment, the stay 12tj may be a straight member, or it may be a member that falls into the recess of the bottom plate 11 by the action of its own weight and maintains the open state of the main body. Furthermore, a latch 17ti magnet may also be used, which is provided in the upper unit 3 and cooperates with the lower unit 4 so that the stay 12
It is also possible to have a configuration that releases . Also, the member that presses the stay 12 is linked to the rotation of the push pin, for example, the latch 170).
The stay 12 may come into contact with the U-shaped side wall, and the stay 12 may be pushed downward by this force and released from the latch 17. In other words, the removal stay 1 that holds the main body of the device
2 to the -H launch 17 to open the main body of the apparatus again, it is only necessary that the latch 17 of the stay 12 be disengaged. Further, the device main body is not limited to one that is divided into vertical sections (for example, the present invention can be applied even if it is divided into left and right sections or three sections).

As described above, in the present invention, since the device main body is locked in the open state by the support means when opened, it is possible to provide a 1iki* formation km in which the main body will not be closed inadvertently.

[Brief explanation of drawings]

Fig. 1 is a side view of a copying machine using an embodiment of the present invention, Fig. 2 is a diagonal view of the latch portion, Fig. 3 is a top view showing the state in which the upper unit is about to close, and Fig. 4 is a side view of a copying machine using an embodiment of the present invention. The figure is a side view showing a state in which the upper unit is closed. In the figure, 3ti is the upper unit, 4 is the lower unit, 6.
7 is a torsion bar, 12 is a stay, 15 is a spring, 16 is
F! A stopper, 17 is a latch, and 18 is a push bottle. Tanfu Canon Co., Ltd.

Claims (1)

[Claims] (1) The MV-shaped tube has a structure that can be divided into a first body and a second body, and a supporting means for locking the opened state when the first body and the second body are opened. , an IItIi image forming device, which is patented as having a capturing means that once captures and then releases the released support means when the first and second bodies are closed. (Installation) Claim No. 3, wherein the support means is a stay.
1) The one-email forming device described in item 1). (3) Claim No. 3, wherein the capturing means is a latch.
In term 1) = e* one-time forming device d0