JPH04345176A - Clamshell type image forming device - Google Patents

Abstract

PURPOSE:To improve the sureness of the releasing operation of the upper body and workability for carrying out working by releasing the upper body and to prevent an accident occurring by misunderstandingly and forcibly releasing the upper body. CONSTITUTION:An upper body 2 can be released like a clamshell, through the use of a hinge coupling part 4 as a center, with respect to a substrate 3, and a position regulating lever 14 having oblong holes K1, K2, and K3, in which plural pins P1, P2 and P3 erectly provided on the upper body 2 and the substrate 3 can be fitted and slid, is provided in the vicinity of the hinge coupling part 4. Then, a recessed groove 15 in which the pin can be fitted when the upper body 2 is maximumly released, is provided, on the end part of, at least, one oblong hole of the position regulating lever 14 and a constitution that clicking is obtained when the upper body is maximumly released, is adopted.

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, adjustment, repair, etc. of recording paper jammed in the middle of the paper path. Such a clamshell type image forming apparatus regulates the maximum opening angle of the upper body and can maintain the open state. As for its structure, a position regulating lever is provided near the hinge joint between the upper body and the base body, and has a long hole into which a plurality of pins installed upright on the upper body and the base body can fit and slide. The maximum opening angle of the upper body is regulated by the length of the long hole, and the open state can be maintained in the direction of the long hole.

0003

[Problems to be Solved by the Invention] However, when the upper body is opened, there is no click feeling at the maximum opening point, and it is not possible to clearly sense whether or not the actual opening state is at the maximum. Therefore, if work such as jamming treatment, maintenance management, adjustment, and repair is performed in an insufficiently open state, there is a risk that parts, etc. may get caught in the drawer, or that the upper body may fall down during work. Even though the upper body was at its maximum opening point, there was a risk that the user would force the opening due to a misunderstanding and break the hinge joint.

[0004] This invention is intended to solve the above-mentioned problems, and improves the reliability of the upper body opening operation, the workability of opening the upper body, and the problem that occurs when the upper body is forced to open due to misunderstanding. It is an object of the present invention to provide a clamshell image forming apparatus that can prevent accidents.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a structure in which the upper body can be opened in a clamshell shape around the hinge joint, and the upper body and the base can be opened in the vicinity of the hinge joint. In a clamshell image forming apparatus, the position regulating lever is provided with a long hole into which a plurality of vertical pins can fit and slide, and the maximum opening angle of the upper body can be controlled by the length of the long hole. , at least one of the position regulating levers
A concave groove is provided at the end of the two long holes into which a pin can be inserted when the upper body is fully opened, so that a click feeling can be obtained when the upper body is fully opened.

[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 invention, FIG. 2 is a schematic front view when the upper body is fully opened, and FIG. 3 is a perspective view thereof. In the figure, 1 is a main body of the present image forming apparatus, 2 is an upper body thereof, and 3 is a base body. The upper body 2 is connected to a base bag 3 via a hinge joint 4 so as to be openable in a clamshell shape. ing.

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 portion 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 attached to the upper and lower portions of the thigh 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 thigh part 14a, and the pin P3 reaches the long hole K of the leg 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.

Reference numeral 15 denotes a concave groove provided at the heel end of the elongated hole K3 provided in the leg portion 14b of the position regulating lever 14, and the concave groove 15 is located at the end of the elongated hole K3, as shown in FIG. 1(b). Continuously provided on the lower edge. That is, as described above, when the upper body 2 is opened, the pin P3 moves while slidingly contacting the lower edge of the elongated hole K3, and falls into (fits into) the groove 15 when the upper body 2 is opened to the maximum. A slight shock occurs during this fall, which can be felt by the operator as a clicking sensation when fully opened.

Incidentally, the thigh portion 14a of the position regulating lever 14 is provided with oblique long holes K4 and K5, which are used to release the toner replenishing members connected to each developing device of the developing unit 8. This is to be performed in conjunction with the opening and closing of the upper body 2, and pins P4 and P5 provided on a plate integrated with the toner supply member are fitted.

In the above embodiment, when the upper body 2 is now opened from the closed state shown in FIG.
It gradually descends as it is regulated by the pin P3 of the base body 3 fitted in the diagonally horizontal long hole K3 provided in b. This descent is guided by the pins P1 and P2 and the long holes K1 and K2 of the shin portion 14a. Therefore, the pin P3 moves from the toe side to the heel side while slidingly contacting the lower edge of the long hole K3, and when fully opened, it is provided at the end of the long hole K3 near the heel, continuous with the lower edge. It falls into the groove 15, causing a slight shock to the upper body 2, which allows the operator to know that the upper body has been opened to the maximum.

[0014]

As described above, the present invention allows the upper body to be opened in a clamshell shape around the hinge joint, and a plurality of pins erected on the upper body and the base near the hinge joint. In the clamshell image forming apparatus, the clamshell image forming apparatus includes a position regulating lever having a long hole into which the levers can be fitted and slid, and the maximum opening angle of the upper body can be controlled by the length of the long hole, at least one of the position regulating levers. At the ends of the two long holes, we have created grooves into which the pins can fit when the upper body is fully opened, so when the pins fall (fit) into the grooves when the upper body is fully opened, a slight shock occurs, which can be felt as a click. Since it is clearly sensed by the operator, there is no possibility of insufficient opening, and it can contribute to improving the reliability of opening operations, jamming treatment, maintenance management, adjustment, repair, etc. work efficiency. In addition, since there is no possibility of excessive opening due to misunderstanding, there is no risk of accidents such as damage to the hinge joint, and various other excellent effects are achieved.

[Brief explanation of drawings]

FIG. 1 shows an image forming apparatus of the present invention, (a) is an overall view, (a) is an overall view;
b) is an enlarged view of the main part.

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

FIG. 3 is a schematic perspective view when the upper body is fully 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 13a-13c Paper aisle 14 Position regulation lever 15 Concave groove P1, P2, P3 pin

Claims (1)

[Claims] Claim 1: A length in which the upper body can be opened in a clamshell shape around a hinge joint, and a plurality of pins erected on the upper body and the base can be fitted and slid near the hinge joint. In a clamshell type image forming apparatus that includes a position regulating lever having a hole, and is configured to regulate the maximum opening angle of the upper body by the length of the elongated hole, an end portion of at least one elongated hole of the position regulating lever is provided. , a clamshell type image forming apparatus characterized in that a recessed groove into which a pin can be inserted is provided when the upper body is opened to the maximum.