JPH03120142A - Picture forming device - Google Patents

Abstract

PURPOSE:To contrive the simplification and the highness of efficiency in jam processing work by connecting an open-close mechanism of a case and a paper feed mechanism in a paper feed part through an interruptable interlocking mechanism. CONSTITUTION:Being based on signals from actuators 10, 8, in the case of detecting a paper jam in the vicinity of a transcription part 6 and in the vicinity of a paper feed cassette 2, a clamshell 9, which serves as a location to be operat ed, is displayed, and a clutch 16 is turned on. As a result, by opening the clam shell 9, the paper feed cassette 2 is drawn out with the clamshell 9. Next by the signal from the actuator 10, in the case of detecting a paper jam in the vicinity of the transcription part 6, the clamshell 9, serving as a location to be operated, is displayed, and the clutch 16 is placed in an offcondition. As a result, only the clamshell 9 is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus such as a laser beam printer or a copying machine. The present invention relates to an image forming apparatus.

[Prior Art and Problems to be Solved by the Invention] Conventionally, in a copying machine, for example, when a paper jam occurs due to transfer paper, the approximate location where the paper jam occurred is displayed on the operation panel. No instructions are given as to which part to operate to clear the jam.

Therefore, it is necessary to individually open each section that is considered to correspond to the paper jam depending on the location where the paper jam occurs, and dispose of the jam, which is a troublesome task for the operator.

Therefore, it is an object of the present invention to provide an image forming apparatus that can indicate operation parts according to the occurrence of paper jams and can selectively open them as appropriate, thereby simplifying and increasing the efficiency of jam clearance work. It is to provide.

[Means to solve the problem]

In order to achieve the above object, the main means adopted by the present invention is to feed the transfer paper in the paper feed section to the transfer section covered with a casing that can be opened and closed across the conveyance path. In the image forming apparatus, the opening/closing mechanism of the housing and the paper feeding mechanism of the paper feeding section are connected via an intermittent interlocking mechanism, and the opening/closing mechanism of the housing and the paper feeding mechanism of the paper feeding section are connected to each other via an intermittent interlocking mechanism. image formation in which the interlocking mechanism is turned on and off as appropriate, and the housing and/or the paper feeding mechanism are operated in conjunction with each other or independently to clear a jam. It is a device.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following examples are examples embodying the present invention, and are not intended to limit the technical scope of the present invention.

Here, FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention, and FIG. This is a diagram corresponding to FIG. 1, which shows an example, FIG. 3 is a diagram showing the relationship between the operating states of each part according to the paper jam pattern, and FIG. 4(a) is a diagram corresponding to another embodiment of the present invention. A schematic configuration diagram of the image forming apparatus (see Figure 16)
), a partial side view showing the roller support structure of the manual feeding unit installed in the image forming apparatus shown in FIG. 5+1),
(11) is a diagram corresponding to FIG. 4 ta+, which shows an example of the operation status of each part in response to the occurrence of a paper jam in the image forming apparatus according to the embodiment of the image described above.

In the copying machine A according to this embodiment, FIGS. 1 and 2 (a
), (As shown in bl, a paper feed cassette 2 (paper feed unit) is removably installed at the bottom of the copying machine main body l. Transfer paper (not shown) is installed at the bottom of the paper feed cassette 2. A mounting board 3 is provided for storing the transfer paper, and the mounting board 3 is always held upward by a spring 5 so that the transfer paper can come into contact with the paper feed roller 4 provided on the copying machine main body 1. It is elastically biased towards.

Then, as the paper feed roller 4 rotates, the transfer paper in the paper feed cassette 2 is fed to the pair of registration rollers 7 on the upstream side of the transfer section 6. In this case, the paper feed roller 4. Paper feed cassette 2 (For details, loading plate 3. Spring 5.
A paper feeding mechanism 17 is constituted by a rack 15), which will be described later, a pinion gear 14, which will be described later, and the like.

Further, when a paper jam of transfer paper near the paper feed cassette 2 is detected by the actuator 8, the paper feed cassette 2 is pulled out and the transfer paper and the paper feed roller 4 are pulled out so that the jam can be easily cleared. The contact is released.

The transfer section 6 is covered with a taram shell 9 (housing) that can be opened and closed across the transport path. Talamusiel 9 above
can swing together with one of the rollers constituting the pair of registration rollers 7 (FIG. 2(a)).

2). Therefore, when a paper jam of transfer paper near the transfer section 6 is detected by the actuator IO, the jam can be easily cleared by opening the clamshell 9.

A gear 11 is attached to the swinging wheel core of the Taram shell 9, and the gear 11 includes a gear 12, a double gear 13
It is connected via a pinion gear 14 to a rack 15 provided in the longitudinal direction (drawing direction) of the side portion of the paper feed force set 2 . A latch 16 (interlocking mechanism) is interposed inside the double gear 13 so as to be able to connect and disconnect.

Therefore, when the clutch 16 is turned on, the double gear 13 is integrated, and the paper feed cassette 2 is pulled out as the taram shell 9 is opened. On the other hand, when the clutch 16 is turned off, the double gear 13 is separated, and only the taram shell 9 is opened.

Further, in the present embodiment, a display panel is provided on the transfer section 6 and in the vicinity of the paper feed cassette 2 to display the parts to be operated when clearing the paper jam, depending on the state of the paper jam.

That is, depending on the state of the output signal from the actuator 8.10, the clamshell 9. The configuration is such that LEDs indicating each part of the paper feed cassette 2 are lit. An example of the display on the display panel is shown in the jam display column in FIG.

Subsequently, based on FIG. 3, the operation of the copying machine according to the above configuration will be explained.

(2) When a paper jam is detected near the transfer section 6 and the paper feed cassette 2 based on the signal from the actuator 1O18, the taram shell 9 is displayed as the part to be operated, and the clutch 16 is turned on. As a result, by opening the taram shell 9, the paper feed cassette 2 is pulled out together with the taramu shell 9 (Fig. 2 T
a+).

(2) When a paper jam near the transfer unit 6 is detected by a signal from the actuator IO, the clamshell 9 is displayed as the part to be operated, and the clutch 16 is turned off. As a result, only the taram shell 9 is opened (see FIG. 2(g)).

(2) When a paper jam near the paper feed cassette 2 is detected based on a signal from the actuator 8, the paper feed cassette 2 is displayed as the part to be operated, and the clutch 16 is turned off.

As a result, only the paper feed cassette 2 is pulled out.

In the device of this embodiment, as described above, the parts to be operated are displayed according to the state of paper jams near the transfer section 6 and near the paper feed cassette 2, and the clutch 16 is controlled on and off as appropriate to prevent paper jams. Since the paper feed cassette 2 constituting the shell 9 and/or the paper feed mechanism 17 can be opened in conjunction with each other or independently, jam removal work on the transfer paper conveyance path can be performed extremely easily and efficiently. be able to.

Furthermore, in the apparatus of this embodiment, a manual feeding unit can be installed in place of the paper feeding cassette 2 in a removable manner.

In this case, it is necessary to provide a rack capable of meshing with the pinion gear 14 in the longitudinal direction of the side of the manual feeding unit, as in the case of the paper feeding cassette 2.

Continuing, Figure 4 (al, (bl) and Figure 5 (al,
(A copying machine B according to another embodiment of the present invention will be explained based on bl.

Since the copying machine 11B according to this embodiment has substantially the same basic structure as the copying machine A (see FIGS. 1 and 2), the same reference numerals will be used for common elements, and detailed descriptions thereof will be given. is omitted.

That is, in the copying machine B according to this embodiment, the copying MIA
Manual feed unit 1 instead of paper feed cassette 2 in case of
8 (paper feed section) is removably attached to the lower part of the copying machine main body l. A roller 19 is supported inside the manual feeding unit 18 so as to be slidable in the vertical direction.
The roller 19 feeds the transfer paper (
A spring 20 (not shown) is always elastically biased upward so that the transfer paper can come into contact with the paper feed roller 4 when the transfer paper (not shown) is manually fed. ing.

On the other hand, a gear 21 is meshed with the double gear 13 provided with the clutch 16, and a crankshaft 22 is pivotally attached to the gear 21 at a position eccentric from the rotation axis.

The crankshaft 22 is in contact with a shaft 23 that rotatably supports the roller 19, and is used to push down the roller 19 as the gear 21 rotates. The return operation of the roller 19 and crankshaft 22 is achieved by the elastic biasing force of the spring 20.

Therefore, when a paper jam of transfer paper near the manual feeding unit 18 is detected by the actuator 8, the roller 19 is pushed down as the gear 21 rotates so that the jam can be easily cleared. The contact between the transfer paper and the paper feed roller 4 is released.

Furthermore, in the copying machine B according to this embodiment, the double gear 13
A bevel gear 24 is attached coaxially with the side that meshes with the gear 21, and the bevel gear 24 meshes with a bevel gear 25. The bevel gear 25 is connected to a knob 26 rotatably provided on the copying machine main body 1.
is connected to.

Therefore, by rotating the knob 26 while the clutch 16 is off (the connection with the opening/closing mechanism of the clamshell 9 is cut off!!), the roller 19 is rotated through the gear 21 and crankshaft 22. can be pushed down.At this time, by operating the clamshell 9, only the clamshell 9 is released (see Figure 5).
reference).

On the other hand, when the clutch 16 is on, the roller 19 is pushed down in conjunction with the opening operation of the clamshell 9 (see FIG. 5 ta+).

In this case, the paper feed roller 41 manual feed unit 18 (
For details, see Laura 19. Spring 20. axis 23).

Gear 21. Crankshaft 22. A paper feeding mechanism 27 is composed of bevel gears 24, 25, a knob 26, and the like.

In the structure of the above embodiment, a paper feed cassette is installed in place of the manual feed unit 18, and the mounting plate, which is always elastically biased upward within the paper feed force center, is attached to the crankshaft 22. It may be pressed down further.

Further, in place of the bevel gears 24, 25 and the knob 26, an operating lever (not shown) is provided on the copying machine main body l so as to be slidable vertically, and the gear 21 is rotated by the operating lever to rotate the crankshaft 22. may be activated.

That is, the operating lever is pivotally attached to the side of the double gear 13 that meshes with the gear 21, and the operating lever is slid along an arc locus.

Further, an elongated hole is formed in the longitudinal direction of the operating lever, and a pin attached to the side of the double gear 13 that meshes with the gear 21 is inserted into the elongated hole, and the operating lever is slid linearly.

However, in these cases, if the gear ratio between the double gear 13 and the gear 21 is set to a relatively large value, the amount of movement of the operating lever can be made relatively small.

Furthermore, in the apparatus of this embodiment, as in the case of the copying machine A, the operation panel (not shown) is the part that should be operated depending on the state of paper jams near the transfer section 6 and near the manual feeding unit 18.
At the same time, the clutch 16 is controlled on and off as appropriate to feed the clamshell 9 and/or the paper feed mechanism 27.
The rollers 19 constituting the
6) can be opened independently by rotating the switch.

In this case, in FIG. 3, the roller 19 in this embodiment corresponds to the paper feed cassette 2 of the release section in the same figure.

Therefore, also in the copying machine B according to the present embodiment, the jam removal work on the transfer paper conveyance path can be carried out extremely simply and efficiently.

Although this embodiment has been explained using a Taramshiel type copying machine as an example, the mechanism according to the present invention is capable of attaching and detaching the transfer section, fixing section, etc. to the main body of the apparatus in a pull-out manner across the transport path of the transfer paper. It can also be applied to image forming apparatuses having a structure that can be opened and closed.

〔Effect of the invention〕

As described above, the present invention provides an image forming apparatus in which transfer paper in a paper feeding section is fed to a transfer section covered with a casing that can be opened and closed across a conveyance path, and the present invention provides an opening/closing mechanism for the casing and an opening/closing mechanism for the casing. It is connected to the paper feeding mechanism of the paper feeding unit via an interlocking mechanism that can be intermittent, and displays the parts to be operated depending on the state of paper jams on the transfer unit and the paper feeding unit, and operates the interlocking mechanism as appropriate. Since the image forming apparatus is characterized in that the above-mentioned housing and/or the above-mentioned paper feeding mechanism can be turned on and off in conjunction with each other or independently operated to clear a jam, the jam clearing work can be simplified and High efficiency can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention, and FIG. 2 (al and (bl) respectively show an example of the operation status of each part depending on the state of paper jam occurrence in the image forming apparatus. 1, FIG. 3 is a chart showing the relationship between the operating states of each part according to the paper jam pattern, and FIG. 4 is a schematic diagram of an image forming apparatus according to another embodiment of the present invention. 5(a) is a partial side view showing the roller support structure of the manual feeding unit installed in the image forming apparatus shown in FIG. 5(a), and FIG. FIG. 4 (corresponding to 111) shows an example of the operation status of each part according to the occurrence of a paper jam in the image forming apparatus according to the embodiment. [Explanation of symbols] 1... Copying machine Main body 2... Paper feed cassette (paper feed section) 3... Mounting plate 4... Paper feed roller 5.2
0... Spring 6... Transfer section 7... Registration roller pair 8.10... Actuator 9... Clam shell (housing) 1.12.21... Gear 3... Double gear 14.・Pinion gear 5・
...Rack 6...Clutch (interlocking mechanism) 7.27...Paper feeding mechanism 8...Manual feeding unit (paper feeding section)

Claims (1)

[Scope of Claims] 1. In an image forming apparatus configured to feed transfer paper in a paper feeding section to a transfer section covered with a housing that can be opened and closed with a conveyance path as a boundary, an opening/closing mechanism of the housing and the feeding section are provided. It is connected to the paper feeder model of the paper section via an intermittent interlocking mechanism, and displays the parts to be operated depending on the state of paper jams on the transfer section and the paper feed section, and turns on the interlocking mechanism as appropriate. - An image forming apparatus characterized in that a jam can be cleared by turning off and operating the casing and/or the paper feeding mechanism in conjunction with each other or independently.