JPH04345175A - Clamshell type image forming device - Google Patents

Abstract

PURPOSE:To attain reduction in cost by reducing the number of interlocking switches individually required in origin, for detecting the opening/closing of the upper body and a front door. CONSTITUTION:This clamshell type image forming device is provided with a first member 15 turned by the movement of a position regulating lever 14 interlocking to the opening/closing of the upper body 2 and a second member 19 which is pivotally attached to the first member 15, and operated by a projection 22 provided on the inner surface of the front door 21, to turn on/off the interlocking switch 23 at the time of closing the upper body 2, and adopts a constitution that the opening/closing of the upper body 2 and a door are detected by one interlocking switch.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamshell type image forming apparatus whose upper body can be opened across a paper path.

0002

2. Description of the Related Art In general, this type of clamshell type image forming apparatus has the advantage of facilitating the processing, maintenance, inspection, repair, etc. of recording paper jammed in the middle of the paper path. In order to regulate the maximum opening angle of the upper body and maintain the open state, such a clamshell type image forming apparatus has a mechanism that is connected to the opening and closing of the upper body near the hinge joint between the upper body and the base body. It is equipped with a position regulating lever that can be moved. In addition, there is a door on the front of the upper body that allows maintenance, inspection, repair, etc. to be performed with the upper body closed, and the door can be opened and closed independently of the opening and closing of the upper body. There is. An interlock switch is provided that detects the opening/closing of the upper body and the opening/closing of the front door, and prevents the device from operating even if the start button is pressed when they are opened.

0003

[Problems to be Solved by the Invention] The above-mentioned interlock switch is normally required to open and close the upper body and to open and close the front door, and each interlock switch is provided with an operating mechanism. The number of parts increased, leading to higher costs.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a clamshell type image forming apparatus that reduces the number of interlock switches and reduces the cost.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention allows the upper body to open across the paper path, move in conjunction with the opening and closing of the upper body, and regulate the maximum opening angle. A clamshell image forming apparatus including a position regulating lever includes a first member that rotates in conjunction with movement of the position regulating lever, and a first member pivotally attached to the first member and provided on the inner surface of the door when the upper body is closed. and a second member that is activated by a protrusion provided on the interlock switch to turn the interlock switch on and off, and is configured such that opening and closing of the upper body and opening and closing of the door can be detected with a single interlock switch.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained based on an embodiment shown in the accompanying drawings. FIG. 1 is a schematic front view of the image forming apparatus of the present application, FIG. 2 is a schematic front view when the upper body is open, FIG. 3 is a perspective view of the main parts, and FIG. 4 is when the upper body is open and closed. FIG. 5 is a diagram showing the action when the door is opened. In the figure,
1 is a main body of the image forming apparatus of the present application, 2 is an upper body thereof, and 3 is a base body. The upper body 2 is connected to the base body 3 via a hinge joint 4 so as to be openable in a clamshell shape.

Reference numeral 5 denotes a photosensitive drum installed on the upper body 2. Around the drum 5, there is a charging electrode 6, a writing unit 7 for writing image information as a latent image on the circumferential surface of the drum 5, and a toner toner for writing the latent image. A developing unit 8 that develops an image, a transfer conveyance unit 9 that transfers a toner image from the drum to a recording paper, and a cleaning unit 10 that cleans toner remaining on the circumferential surface of the drum are arranged.

The developing unit 8 includes four developing devices each containing yellow, magenta, cyan, and black toners. Further, the transfer conveyance unit 9 has a rotatable transfer shaft 9a, and the transfer shaft 9a is charged with a voltage and comes into contact with the circumferential surface of the drum 5 via the belt 9b. It constitutes a transfer section that transfers the toner image on the circumferential surface onto recording paper. belt 9
b is driven by a drive shaft 9c. 11 is a fixing section, 12 is a paper discharge section, and 13a to 13c are paper paths from a paper feed section (not shown) to a transfer section, from the transfer section to a fixing section, and from the fixing section to a paper discharge section.

Reference numeral 14 denotes a position regulating lever provided in the vicinity of the hinge joint 4 that connects the upper body 2 and the base body 3. The position regulating lever 14 is formed in the shape of a boot, and is located at the upper and lower portions of the shin portion 14a. has a vertical long hole K1 into which the pins P1 and P2 erected above and below the upper body 2 can fit and slide.
, K2 are provided, and the leg portion 14b is provided with an oblique horizontal elongated hole K3 into which a pin P3 provided upright on the base body 3 can fit and slide.
is provided.

When the upper body 2 is opened centering on the hinge joint 4 from the closed state shown in FIG. 1, the position regulating lever 14 is fitted into an obliquely horizontal elongated hole K3 provided in the leg portion 14b. It is regulated by the pin P3 of the base body 3 and gradually descends. However, when the upper body 2 is opened to the maximum, the pin P
1, P2 reaches the upper ends of the long holes K1 and K2 of the shin part 14a, and the pin P3 reaches the long hole K of the foot part 14b.
It reaches the heel end of 3 and restricts the maximum opening angle of the upper body 2. Since these pins P1 to P3 are fixed,
In reality, the position regulating lever 14 moves. Note that the shin portion 14a of the position regulating lever 14 has oblique long holes K4 and K5.
This is to release the toner replenishing member connected to each developing device of the developing unit 8 in conjunction with the opening and closing of the upper body 2, and the toner replenishing member is integrated with the toner replenishing member. Pins P4 and P5 provided on the plate are fitted together.

Reference numeral 15 denotes a first member that rotates in conjunction with the movement of the position regulating lever 14, and the first member 15 is rotatably attached to a support shaft 17 implanted in a mounting board 16 as shown in FIG. One end 15a of the lever 15a resists the spring force of the spring member 18 at its side edge when the position regulating lever 14 is in the upper position (when the upper body 2 is closed). It is in a state of rotation in the clockwise direction.

Reference numeral 19 denotes a second member pivotally attached to the other end 15b of the first member 15 via a pin 20;
is configured in the shape of a "h", one end 19a of which is connected to the other end 19
It is heavier than b. That is, in the normal state, the second member 19 has one end 19a that is substantially hanging down, and the other end 19b that is substantially horizontal.

21 is a shaft 21a so as to cover the front surface of the upper body 2.
The door 21 is a door that can be opened and closed centering on the door 21. The door 21 is provided so that the developing unit 8 and the like can be pulled out and maintenance and inspection operations can be performed without opening the upper body 2. Reference numeral 22 denotes a protrusion provided on the inner surface of the door 21. When the door is at rest, the protrusion 22 presses one end 19a of the second member 19 clockwise, and the other end 19b pushes the actuator 23a of the interlock switch 23. It is turned on.

In the above embodiment, when the upper body 2 is opened from the closed state shown in FIG. 1 as shown in FIG. It is regulated by the pin P3 of the base body 3 fitted into the obliquely horizontal long hole K3, and gradually descends. When the position regulating lever 14 is lowered, the first member 15 is no longer supported, so the spring force of the spring member 18 is applied to the support shaft 1.
Rotate counterclockwise around point 7 as shown by the two-dot chain line in FIG. As a result, the second member 19 is connected to the interlock switch 23.
(See FIG. 2).

Next, when the upper body 2 in the open state is closed,
The position regulating lever 14 has a diagonal horizontal elongated hole K3 provided in its foot 14b and a pin P3 of the base body 3 fitted into the oblique horizontal elongated hole K3.
The first member 15 is gradually raised by the action of the first member 15, and one end 15a of the first member 15 is rotated clockwise at the side edge of the position regulating lever 14 against the spring force of the spring member 18. Therefore, the first member 1
The actuator 23a of the interlock switch 23 is turned on at the other end 19b of the second member 19, which is pivotally connected to the other end 15b of the second member 19 via the pin 20, as shown by the solid line in FIG.

Furthermore, when the front door 21 is opened with the upper body 2 closed in order to pull out the developing unit 8, etc., one end 19a of the second member 19 is pressed clockwise by the protrusion 22. This state is released as shown in FIG. Since the second member 19 rotates counterclockwise due to the weight on the one end 19a side, the other end 19b of the second member 19 separates from the actuator 23a of the interlock switch 23. When the door 21 is closed, one end 19a of the second member 19 is pressed clockwise by the protrusion 22,
As shown in FIG. 4, the actuator 23a of the interlock switch 23 is turned on.

[0017]

As described above, the present invention provides a clamshell whose upper body can be opened across a paper path, and which is equipped with a position regulating lever that moves in conjunction with the opening and closing of the upper body and can regulate its maximum opening angle. The type image forming apparatus includes a first member that rotates in conjunction with the movement of the position regulating lever, and an interface that is pivotally attached to the first member and is actuated by a projection provided on the inner surface of the door when the upper body is closed. Since it is equipped with a second member that turns the lock switch on and off, it is possible to detect the opening and closing of the upper body and the opening and closing of the door with a single interlock switch, making it possible to reduce the number of interlock switches and reduce costs. It has the following effects.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an image forming apparatus of the present application.

FIG. 2 is a schematic front view of the upper body when it is opened.

FIG. 3 is a perspective view of main parts.

FIG. 4 is a diagram showing the action when the upper body is opened and closed.

FIG. 5 is a diagram showing the effect when the door is opened.

[Explanation of symbols]

1 Main body of image forming apparatus 2 Upper body 3 Base 4 Hinge joint 5 Photoreceptor drum 6 Charged electrode 7 Writing unit 8 Developing unit 9 Transfer conveyance unit 10 Cleaning unit 11 Fixing section 12 Paper discharge section 14 Position regulation lever 15 First member 19 Second member 21 Door 22 Protrusion 23 Interlock switch

Claims (1)

[Claims] 1. A clamshell image forming apparatus, wherein the upper body can be opened with a paper path as a boundary, and a position regulating lever that moves in conjunction with the opening and closing of the upper body and can regulate the maximum opening angle thereof. a first member that rotates in conjunction with the movement of the position regulation lever; and a second member that is pivotally connected to the first member and that is actuated by a protrusion provided on the inner surface of the door when the upper body is closed to turn an interlock switch on and off. A clamshell image forming apparatus comprising two members.