JPH0443892Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention divides the copying machine case into upper and lower halves, and configures the upper case to be openable and closable with respect to the lower case. This invention relates to a safety device for a shell-type copying machine equipped with a flexible front cover.

[Conventional technology]

Shell-type copying machines are already known in which a copying machine case is divided into upper and lower halves, the upper case is configured to be openable and closable relative to the lower case, and each of the upper and lower cases is provided with a front cover that can be opened and closed.

[Problem that the invention attempts to solve]

Shell-type copiers have an upper case, a front cover of the upper case, and a front cover of the lower case that can be opened and closed. This allows you to open the necessary parts at any time, making maintenance inspections around the photoreceptor and the transport path easier. This has the advantage of making it easy to clear paper jams, etc., but on the other hand, because the upper case, front cover of the upper case, and front cover of the lower case can be opened and closed, it is important to ensure safety. must be configured so that a safety switch operates to shut off the electrical system when any of these three are opened.
The drawback was that the structure of the safety device was complicated because there were many parts that could be opened and closed.

In view of the above-mentioned conventional drawbacks, the present invention has a simple and inexpensive configuration in which one safety switch is shared by the upper case, the front cover of the upper case, and the front cover of the lower case to ensure safety. This is what I am trying to do.

[Means for solving problems]

The technical measures taken by the present invention to achieve the above objectives are as follows. That is, the features of the present invention are that the copying machine case is divided into upper and lower halves, and the upper case is configured to be able to be opened and closed with respect to the lower case.
In a shell-type copying machine, in which the upper and lower cases each have a front cover that can be opened and closed, the safety switch can be moved back and forth between an active position and a non-active position, and can be moved to the non-active position. the front cover of the upper case is provided with a first operation part for turning on and operating the safety switch in the operating position by opening and closing the front cover or the upper case;
The front cover of the lower case is provided with a second operation part that moves the safety switch between the non-operating position and the operating position by opening and closing the front cover.

[Effect]

According to the above configuration, when the front cover of the upper case is opened, the first operating section provided on the front cover is separated from the safety switch, so the safety switch is turned off and the electrical system is cut off.

Even when the front cover of the upper case remains closed, opening the upper case causes the first operating section to move away from the safety switch, thereby turning off the safety switch and cutting off the electrical system.

Even when the upper case and the front cover of the upper case are closed, by opening the front cover of the lower case, the pressure on the safety switch by the second operation part provided on the front cover is released, so the safety switch can be activated. is moved to a non-operating position by the biasing force and separated from the first operating section, so the safety switch is turned off and the electrical system is cut off.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the external appearance of a shell-type electrostatographic copying machine capable of double-sided copying, and FIG. 2 shows an outline of the inner structure of the copying machine. Copy machine case 1
The upper case 2 is divided into upper and lower halves, and the upper case 2 is pivotally connected to the lower case 3 so as to be able to swing open and close around a horizontal axis. The upper case 2 and the lower case 3 are provided with front covers 2a and 3a, respectively, which are pivotally supported on the lower side portions so as to be able to swing open and close in the front and rear directions.

The upper case 2 includes a movable document platen exposure device 4,
Additionally, a photoreceptor 5, a developing device 6, a cleaning device 7, etc. are attached, and these can also be lifted upward as a unit by opening the upper case 2.

The lower case 3 includes a transfer device 9 and a separation device 10 facing the photoreceptor 5, and a paper feed cassette 11.
a paper feeding and conveying device 12 that feeds the copy paper sent out from a and 11b to the transfer device 9, and a paper ejection tray through which the copy paper after transfer and separation is passed from the fixing device 13 to a pair of upper and lower paper ejection rollers 14a and 14b. A paper discharge conveying device 16 for discharging paper onto a paper 15, and a double-sided copying mechanism 17 for performing double-sided copying if necessary are provided. The double-sided copying mechanism 17 includes a reversing mechanism section 18 that reverses the conveyance direction of the copy paper after completing single-sided copying through the fixing device 13, and a copy paper conveyance device 20 that conveys the reversed copy paper to the intermediate tray 19. a paper refeeding mechanism section 21 for refeeding copy sheets temporarily stocked in the intermediate tray 19 to the transfer device 9;
It is composed of.

This embodiment is characterized in that the following safety device A is provided in the shell-type copying machine having the above configuration.

The configuration of safety device A is as follows.

As shown in FIGS. 3 and 4, a bracket 23 having a substantially square shape in plan view is screwed to the front plate 22 on the lower case 3 side, and the bracket 23 is used to cut off the electrical system of the copying machine. safety switch for
SW... is in the operating position (directly below the first operating section 29, which will be described later) and the non-operating position (the first operating section 29, which will be explained later).
It is provided in a state where it can freely move back and forth across the position (deviated from the position) and is biased toward the non-operating position. To explain this configuration in more detail, the third
As shown in the figures and FIG.
4 and the upper edge of the bracket 23.
A movable member 25 having a substantially U-shape in plan view is provided so as to be slidably supported only in the axial direction of the safety switch SW.
6 is fixed with screws, and a compression spring 27 is provided between the movable member 25 and the bracket 23 so as to be fitted around the guide shaft 24.

Note that the movable member 2 is attached to the front end of the bracket 23.
A through hole 28 is formed at a position opposite to the front surface of 5.

On the other hand, the front cover 2a of the upper case 2 is provided with a first operation part 29 that turns on and operates the safety switch SW that is in the operating position by opening and closing the front cover 2a or the upper case 2. The tip of the front cover 3a can be inserted into the through hole 28, and a safety switch can be activated by opening and closing the front cover 3a.
A second operating section 30 is provided for moving the SWs between a non-operating position and an operating position. Reference numeral 29a is an oblique side portion formed on the first operating portion 29, and serves to guide the second operating portion 30 to smoothly move the safety switch SW from the non-operating position to the operating position.

The movable member 25 is provided with a longitudinal shaft 31 that penetrates the front plate 22 and is capable of reciprocating in the axial direction together with the movable member 25, and is moved by the biasing force of the compression spring 27. It is energized to move forward. 22a is a through hole formed in the front side plate 22.

As shown in FIG. 8, the frame 20a that pivotally supports the lower rollers 32a of the copy paper conveying device 20 is configured to be able to swing vertically around a support shaft 33, and by swinging the frame 20a, It is configured to open and close a conveyance path a formed by upper rollers 32b and lower rollers 32a. In other words, if a paper jam occurs in the conveyance path a, the frame 20a can be swung downward to open the conveyance path a.

The frame 20a is provided with a contact portion 34 that can be switched between a state located within the movement path of the shaft body 31 and a state located outside the movement path by opening and closing the conveyance path a.

Next, the operation of the safety device A having the above configuration will be explained.

As shown in FIG. 4, when the front covers 2a and 3a of the upper and lower cases 2 and 3 are closed, the second operating section 30 of the front cover 3a moves the safety switch SW to the operating position via the movable member 25. Since the safety switch SW... is kept in the engaged state by the first operating portion 29 of the front cover 2a. Further, the shaft body 31 is in a state of being pushed rearward via the movable member 25.

As shown in FIG. 5, the front cover 3 of the lower case 3
When a is released, the pressing state of the safety switch SW... by the second operation part 30 is released, so the safety switch SW... moves to the non-operating position by the biasing force of the compression spring 27, and the safety switch SW... The electrical system will be cut off. In this state, since the shaft body 31 is moving forward together with the movable member 25, the frame 20a of the copy paper transport device 20 can be swung downward to open the transport path a. By opening the conveyance path a, the contact portion 34 provided on the frame 20a enters the movement path of the shaft body 31, so the front cover 3a cannot be closed unless the conveyance path a is closed. That is, as shown in FIG. 6, even if the front cover 3a is attempted to be closed, the tip of the second operating section 30 comes into contact with the movable member 25 that is integrated with the shaft 31, and the tip of the shaft 31 comes into contact with the abutting section 34. Front cover 3
It is possible to prevent an erroneous operation such as when the front cover 3a is closed while the transport path a is left open because the transport path a cannot be closed.

Furthermore, when only the front cover 2a of the upper case 2 is opened, the first operation part 29 swings around the fulcrum of the front cover 2a, as shown by the solid line in FIG. 7, so the safety switch SW... Cut, front cover 2a
Even in the closed state, by opening the upper case 2, the first operation part 29 rises as shown by the dashed line in Fig. 7, so the safety switch SW...
safety is ensured in both cases.

[Effect of idea]

The present invention consists of the above-mentioned configuration, including an upper case,
The safety switch operates and cuts off the electrical system when any of the three front covers, the front cover of the upper case and the front cover of the lower case, is opened, so one safety switch can be connected to the upper case, the front cover of the upper case, and the lower case. The simple and inexpensive structure in which the front cover is shared by all three parties has the effect of ensuring safety.

Moreover, a safety switch is provided on the lower case side so as to be able to reciprocate between an active position and a non-active position, and is biased toward the non-active position. A first operation part is provided on the front cover of the lower case to turn on and operate the safety switch in the active position by opening and closing the upper case, and to move the safety switch between the non-working position and the working position by opening and closing the front cover. Since the second operation part is provided, the stroke of the reciprocating movement of the safety switch can be shortened, and there is an effect that the wiring of the safety switch is less likely to break.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention,
Fig. 1 is a perspective view showing the external appearance of a shell-type electrostatographic copying machine capable of double-sided copying, Fig. 2 is a schematic sectional view showing the outline of the internal structure of the copying machine, and Fig. 3 is a safety device. FIGS. 4 to 7 are sectional views explaining the operation of the safety device, and FIG. 8 is a partially cutaway perspective view.
The figure is a side view of essential parts of the copy paper conveying device. A... Safety device, SW... Safety switch, 1...
... copying machine case, 2 ... upper case, 3 ... lower case, 2a, 3a ... front cover, 29 ... first operation section, 30 ... second operation section.

Claims (1)

[Scope of utility model registration request] In a shell-type copying machine, the copying machine case is divided into upper and lower halves, and the upper case can be opened and closed relative to the lower case, and each of the upper and lower cases has a front cover that can be opened and closed. The switch is provided so that it can freely reciprocate between an active position and a non-active position and is biased toward the non-active position, and the front cover of the upper case has a switch that can be moved to the active position by opening or closing the front cover or the upper case. A first operation part is provided on the front cover of the lower case to turn on and operate the safety switch, and a second operation part is provided on the front cover of the lower case to move the safety switch between a non-operating position and an operating position by opening and closing the front cover. A safety device for a shell-type copying machine characterized by the following.