JPH01158461A - Bisected copying device - Google Patents

Abstract

PURPOSE:To attain reduction in weight and size by folding the open end part of the base plate of an upper main body in a downward-angled groove shape and using the groove side of the folded part as a hanging rail for an image producing unit and the upper surface thereof also as the part to be locked of a lock pawl provided on a lower main body side. CONSTITUTION:The image producing unit 5 is hung with the hanging rails 12a and 12b provided on the base plate of the upper main body 1 through projecting stripes 5a and 5b provided on both side parts in order to be freely drawn out from a front side. The groove side of the folded part 11' obtained by folding the end part of the base plate 11 in the downward-angled groove shape is used as the rail 12a on the open end part side between the rails 12a and 12b. Since the end part of the base plate is reinforced by forming the folded part 11', the thinning and the lightening of the base plate is accomplished as it is reinforced. The upper surface of the folded part 11' is used also as the part to be locked for locking the lock pawl provided on the lower main body side. Thus, the structure of a device can be simplified and the scaling-down of an entire device can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a two-part copying device whose upper body can be opened in the shape of a taram shell.

[Background of the invention]

In general, this type of two-part type copying apparatus is designed so that the upper side above the paper path can be opened in order to facilitate paper jam removal and maintenance. In other words, the upper main body contains an optical unit that obtains document information, and the lower part contains an image forming unit that records document information (including a photoreceptor drum and charging, developing, transfer, and cleaning mechanisms arranged around it). (incorporated). Furthermore, a plurality of image forming units are prepared for each color of toner to be used, and color copies can often be easily created by replacing them as appropriate.

However, such devices have the following problems. ■In order to prevent the built-in optical unit from becoming distorted when the upper body opens and closes, the bottom plate is made of a thick metal plate, which increases the weight of the upper body. ■There is not enough space to install a hanging rail for attaching the image forming unit to the lower surface of the bottom plate of the upper body so that it can be pulled out. ■Because the upper body is heavy, the spring means that opens the upper body requires a large spring force, and the structure of the lower body and the locking mechanism that holds the upper body in the closed state also need to be robust. became.

■As a result of the above (■) to (■), this resulted in an increase in production costs and made it difficult to downsize the entire device.

[Purpose of the invention]

This invention is intended to solve the above-mentioned problems (1) to (3), and aims to provide a two-part copying device that is lightweight and compact, and can reduce production costs.

[Structure of the invention]

To achieve the above object, the present invention provides a two-part copying device in which upper and lower bodies are hinged and the upper body is spring-biased in the opening direction. The groove side of the folded part is used as a suspension rail for the image forming unit, and the upper surface is also used as the locked part of the lock claw provided on the lower body side, so that the optical unit, image forming unit, and locking mechanism can be efficiently connected. It is configured so that it can be placed.

〔Example〕

Next, the present invention will be described based on an embodiment shown in the accompanying drawings.

In the figure, 1 is an upper body, and 2 is a lower body. The upper body 1 and the lower body 2 are connected via a hinge joint 3, so that the upper body 1 can be opened in the shape of a taram shell.

A document table glass 1a is fitted on the upper surface of the upper main body 1.
A document holding plate 1b is attached thereon so as to be openable and closable. Inside the upper body 1, there is a light source 4a that can move while irradiating the original placed on the original table glass la, and a first mirror 4 fixed to the traveling unit 4a' of the light source 4a.
b, second and third mirrors 4C and 4d that bend the reflected light obtained by the first mirror, a variable magnification lens 4e, and a fourth mirror 4f.

Reference numeral 5 denotes an image forming unit, and the image forming unit 5 includes a photoreceptor drum 6 inside, a charging section 7, a phenomenon section 8, and a transfer section 9 around the photosensitive drum 6.
and a cleaning section 10. The transfer section 9 is disposed on the lower main body 2 side, facing the photosensitive drum 6 with the paper path 13 in between.

In order to allow the image forming unit 5 to be freely pulled out from the front side (operator side), a hanging structure is provided on the bottom plate of the upper body 1 (bottom plate of the optical unit) via protrusions 5a and 5b provided on both side surfaces of the image forming unit 5. It is suspended from rails 12a and 12b. Of these rails 12a and 12b, the rail 12a on the open end side folds the end of the bottom plate 11 downward into a square groove shape, and utilizes the groove side of the folded portion 11'. Since the end portion of the bottom plate is reinforced by forming the folded portion 11', the thickness and weight of the bottom plate can be reduced accordingly. Further, the upper surface of this folded portion 11' also serves as a locked portion to which a lock claw provided on the lower body side is locked, as will be described later.

Reference numeral 14 denotes a paper feed cassette in which recording sheets are stored in a stacked manner.

Reference numeral 15 denotes a paper feeding unit, which is arranged in a timing manner between a half-moon roller 16 that feeds the recording paper R one by one from the cassette 14 to the paper path 13, the photosensitive drum 6, and the transfer section 9. It is provided with a second paper feed roller 17 for feeding paper and a guide roller 18, and has a manual feed tray 19 which is detachably attached to the outer surface of one side wall of the lower body 2. A manual feed path 20 communicating with the manual feed tray 19 is provided with a manual feed roller 21 .

Reference numeral 22 denotes a fixing and discharging unit that applies heat and pressure to the recording paper after transfer in the transfer section 9 to fix the toner image on the paper and discharges the paper. A fixing roller 24a is installed inside the fixed unit frame 23.
, a pressure roller 24b and a cleaning roller 25, and further provided with paper ejection rollers 26a and 26b. The recording sheets R discharged from the sheet discharge rollers 26a and 26b are stacked from the inner bottom surface 27 of the lower body 2 toward the outside onto a sheet discharge tray 28 that is removably attached to the outer wall. The fixing roller 24a and pressure roller 24b of the fixing paper discharge unit 22 are connected to the upper main body 1.
When it is closed, a fairly high pressure is applied. This pressing force is applied to the rollers 23 provided above the unit frame 23.
A is obtained by pressing the pressure biasing protrusion 46 provided on the lower surface of the upper body 1.

As shown in the second figure, the hinge joint portion 3 is an upper hinge piece 3 extending from the lower edge of one side of the front and rear skeleton 29.29' of the upper body 1.
A frame 33.3 in which a hinge hole 31 provided at 0 is fixed to the upper surface of one side of the front and rear reinforcing members 32.32' of the lower body 2.
An annular groove 34' provided at the tip of one hinge shaft 34 after being connected to the hinge shafts 34 implanted on the same direction surfaces of the hinge shafts 34'.
The upper body 1 can be easily connected to the lower body 2 by inserting the C ring 34'' and preventing its removal, while the upper body 1 can be moved in one direction along the hinge axis 34 by removing the C ring 34''. can be easily disassembled.

Reference numeral 37 denotes a counterbalance mechanism that opens the upper body 1 in a clamshell shape around the hinge joint 3 as shown in the third figure, and the counterbalance mechanism 37 is fixed to the upper surface of the reinforcing member 32, 32' as described above. Frame 33.3
A fourth
As shown in the figure, it is composed of a shaft 39 whose base end is pivotally connected, and a compression coil spring 40 fitted into the shaft. The head end of the compression coil spring 40 hits a washer 42 that is engaged with a spherical body (large diameter portion at the upper end) 41 fixed to the upper end of the mandrel 39, and its length at maximum extension is regulated. This compression coil spring 4
0 opens the upper body 1 by about 30° with the spring force at maximum extension. Conversely, if the upper body 1 is raised beyond the above angle, it will have no effect on the upper body 1 at all. Therefore, when removing and reassembling the upper body 1 with respect to the lower body 2, the work can be done very easily. Further, when the upper body 1 is closed, the upper end large diameter portion 41 of the shaft 39 is connected to the upper hinge piece 3.
The compression coil spring 40 enters a compressed state by passing through a through hole 44 provided in the horizontal frame body 43 and a through hole 45 provided in the bottom plate 11 of the upper body 1.

The reinforcing members 32, 32' are formed of metal irregularly shaped channel members, and are laid in parallel to the rear and front walls of the lower body 2. The reinforcing member 32' on the rear wall side is directly fixed to the inner bottom surface of the lower body 2, and the reinforcing member 32 on the front wall side straddles the cassette mounting part 2a between the pillars 50 and 51 integrally molded with the lower body 2. It is bridged by

52 is a leg member provided on the lower surface of the lower body 2;
correspond to the respective opposite ends of the reinforcing members 32, 32'. That is, when the upper body 1 is closed, the reinforcing member 32.
A load such as a moment load applied to the leg member 5
I'm trying to concentrate on 2.

Reference numeral 53 denotes a locking mechanism that maintains the free end sides of the upper body 1 and the lower body 2 in a closed state. On the left and right upper edges of the exterior member 54 having the paper feed port 21'',
A locking claw (locking part) 55 having an inclined surface 55' on the upper surface is provided, and the upper surface part (locking part) 56 of the folded part 11' has the locking claw 55 formed at the end of the bottom plate 11 of the upper body 1. It is designed so that it can be locked. As described above, this locked portion 56 also serves as the suspension rail 12a of the image forming unit.

The exterior member 54 includes the left and right lower surfaces and the lower body 2 as shown in FIG.
A compression spring 57a is interposed between the compressed springs 57a and 57a.

57b, it is biased counterclockwise (the direction in which the lock pawl 55 is locked). Therefore, in order to close and lock the open upper body 1, by thrusting your hand into the upper surface of the upper body 1 and pushing it downward, the lower edge of the suspension rail 12a of the image forming unit will move against the upper surface of the lock claw 55. Inclined surface 55
', the exterior member 54 is compressed by springs 57a, 57
While the rail 12a is swung clockwise against the spring force of b, when the upper surface of the rail 12a becomes below the lock claw 55, the exterior member 54 is swung by the action of the compression springs 57a and 57b, and the rail 12a is swung clockwise. It will be locked on the top surface.

Further, a groove 58 is formed on the upper surface of the rail 12a as shown in FIG. 6(a), into which a convex portion 55# provided on the lower surface of the lock pawl 55 can be fitted. That is, this is to prevent the lock claw 55 from easily coming off the rail 12a. As a result, when the lock claw 55 is disengaged, the upper body 1 is once pressed downward and the rail 12a is lowered in the direction of the arrow A as shown in FIG. After floating from the groove 58, the exterior member 5
Put your finger on the handle 59 provided at 4 and turn it outward (in the direction of arrow B)
It is configured so that it cannot be unlocked unless it is swung.

〔Effect of the invention〕

As described above, the present invention provides a two-part copying device in which the upper and lower bodies are hinged and the upper body is biased by a spring in the opening direction. The groove side of the folded part is used as a suspension rail for the image forming unit, and the upper surface is also used as a locked part for a lock claw provided on the lower body side, so that the bottom plate of the upper body, that is, the bottom plate of the optical unit Since it is reinforced by forming the folded portion, the bottom plate can be made thinner and lighter by that amount.

Therefore, the spring means for opening the upper body does not require a large spring force, and the structure of the lower body and the structure of the locking mechanism that holds the upper body in the closed state can be simplified, and production costs can be reduced. It can also contribute to miniaturization of the entire device.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front sectional view of the upper body in a closed state, Fig. 2 is an exploded perspective view showing the reinforcing member and hinge joint of the lower body, and Fig. 3 is the upper body. 4 is an enlarged sectional view of the counterbalance mechanism, FIG. 5 is a partial perspective view of the external appearance showing the locking mechanism, and FIG. 6 is a sectional view showing the function of the hook. - Upper body 2 - Lower body 3 - Seven-ring joint 53 - Lock mechanism 5L-m - Exterior member 55 - Hook 55' - Upper inclined surface 55" - Lower surface convex Part 56 - Locked part (rail 12a) 57a, 57b - Compression sprue IJ 7g 58 - Concave groove 59 - Handle 60 - Seal

Claims (2)

[Claims] (1) In a two-part copying device in which the upper and lower bodies are hinged and the upper body is biased by a spring in the opening direction, the open end of the bottom plate of the upper body is folded downward into a square groove shape, and the groove in the folded part is A two-part copying apparatus characterized in that the side is used as a suspension rail for an image forming unit, and the upper surface is also used as a locked part of a locking claw provided on the lower main body side. (2) A two-part copying apparatus according to claim 1, wherein the bottom plate is a bottom plate of an optical unit built into the upper main body.