JPH0310516Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention includes a front cover that can be opened and closed in the front and rear directions around a first horizontal axis, and a conveyance path that extends around a second horizontal axis perpendicular to the first horizontal axis. a transport path opening/closing member that can be freely opened and closed; opening a safety switch by opening the front cover; and checking the opening/closing of the transport path opening/closing member when the front cover is closed; The present invention relates to a safety mechanism for a copying machine that prevents the front cover from being blocked when the path opening/closing member is opened.

According to the above-mentioned safety mechanism, the conveyance path opening/closing member cannot be opened unless the safety switch is opened. Therefore, it is possible to reliably avoid a dangerous situation in which the moving conveyance section is touched, and The safety switch cannot be closed unless the path opening/closing member is blocked to prevent access to the transport path.
It is excellent in terms of safety.

(Prior art) As a typical example of the above-mentioned safety mechanism,
-There is one published in No. 178248. This device has a mechanism that opens the safety switch when the front cover is opened, and a mechanism that prevents the conveyance path opening/closing member (the upper copying machine unit that can be divided into two parts into upper and lower parts) from being opened unless the front cover is opened. However, since both mechanisms are configured separately, the number of parts increases, and it takes time and effort to incorporate the separately configured mechanisms into the copying machine, resulting in increased costs. There was a drawback that came with it.

(Problems to be Solved by the Invention) The present invention has been devised in view of the above-mentioned circumstances. The purpose is to provide an inexpensive mechanism.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides the safety mechanism of the copying machine described at the beginning, in which the safety switch is attached to a base fixed to the main body of the copying machine,
A switch operating member that closes the safety switch when the front cover is closed is movably provided on the base while being biased in the switch opening direction by a spring, and the switch operating member A first check member for checking the movement in the closing direction is provided on the base so as to be able to be freely switched to a check release state against the urging force of the urging mechanism, and when the conveyance path opening/closing member is closed. Said first
A switching member that switches the restraining member to a restraining release state is connected to the conveyance path opening/closing member, and while the conveyance path opening/closing member is engaged with the switching member when the conveyance path opening/closing member is blocked, opening of the conveyance path opening/closing member is checked. A feature of the present invention is that a second restraining member is connected to the switch operating member.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. FIG. 1 shows a safety mechanism A, and FIGS. 2 and 3 show the operating state of the safety mechanism A. and the fourth
The figure shows the entire copying machine, and this fourth
In the figure, 1 is a main body of the copying machine, and 2 is an image forming unit, which is equipped with a photosensitive drum, a developing device, etc. (not shown), and is configured to be freely drawn out from the front side of the main body 1 of the copying machine.

Reference numeral 3 denotes a front cover that is attached to the lower front side of the copying machine main body 1 via two hinges 4, 4, and can be opened and closed around the left and right first horizontal shafts 5 of the hinges 4, 4; Moreover, it is closed and held by the magnets 6, 6 and the metals 7, 7 magnetically attached thereto.

Reference numeral 8 denotes a paper discharge section cover, which is an example of a conveyance path opening/closing member that will become clear later on, as shown in FIG.
A second horizontal shaft 9 perpendicular to the first horizontal axis 5 is pivotally connected to the lower part of the paper ejecting section of the copying machine main body 1 so as to be openable and closable, and on the inner surface of the paper ejecting section cover 8: A conveyance device 10 for discharging paper is attached, which consists of a pair of upper and lower rollers 10a and 10b, and by opening this paper discharge section cover 8, a conveyance path downstream of the fixing device 11 in the copy paper conveyance direction is opened. This makes it easier to clear paper jams and perform other maintenance.

The connecting hole 12 of the paper discharge section cover 8 with respect to the second horizontal shaft 9 has an elongated hole structure, and is set so that the upper end of the elongated hole corresponds to the second horizontal axis 9 when the cover 8 is closed. As the paper discharge section cover 8 is opened and closed, the lower end of the cover slides on the horizontal plate section 13 of the copying machine main body 1, and the relative position of the connecting hole 12 with respect to the second horizontal shaft 9 is adjusted. Therefore, it is necessary to form a notch in the horizontal plate part 13 to allow rotation of the lower end of the cover, as in the case where the paper discharge part cover 8 is fixedly pivoted. It is known to be advantageous in terms of strength and processing.

Reference numeral 14 denotes a fixing mechanism for the paper discharge section cover 8, which includes a fixing pin 15 provided on the side of the main body 1 of the copying machine, and a hook 16 that can be freely engaged and detached from the fixing pin 15.
It is pivotally connected to the paper discharge section cover 8 in an engaged and biased state by a spring (not shown).

Returning to FIG. 4, reference numeral 17 denotes a safety cover that covers electrical equipment and other devices, and the safety mechanism A is installed inside the safety cover 17.

In FIGS. 1 to 3 showing the safety mechanism A, reference numeral 18 denotes a base, which includes a plate part a for fixing to the copying machine main body 1, a horizontal plate part b extending from the lower end of the base toward the front of the copying machine, It has a rising plate part c bent upward from the front end of the horizontal plate part b, and a switch mounting plate part d, and extends between the fastening plate part a and the rising plate part c. A guide shaft 19 parallel to the second horizontal shaft 9 is provided. A holding plate 20 to which safety switches S for 0V voltage, 100V voltage, and copying function stop are fixed, directs the switch operation direction of the switch operation piece e to the guide shaft 19.
The switch is attached to the switch mounting plate part d in a state where it is oriented in the axial direction of the switch.

To attach this switch holding plate 20 to the switch mounting plate part d, long holes r, r extending in the axial direction of the guide shaft 19 are bored in the upper and lower parts of the plate part d, and the long holes r , r are formed in the switch holding plate 20, and screws 32, 32 are inserted into the elongated holes r, r to be screwed into the screw holes. The operation of the safety switches S can be adjusted within the range of the elongated holes r and r.

Reference numeral 21 denotes a switch operation member held by the guide shaft 19, which includes plate parts f and g corresponding to the horizontal and vertical plate parts b and c, and the switch operation piece e...
The horizontal plate part f has a long hole i in the direction of the guide shaft 19. Then, a pin 22 fitted into the long hole i
is erected on the horizontal plate part b of the base 18, and an E-clip j for preventing removal is fixed to the pin 22,
Then, move the switch operating member 21 to the guide shaft 1.
9 is slidable only in the axial direction. Incidentally, on the lower surface of the horizontal plate part f, protrusions k are bulged out to reduce the sliding resistance.

Next, reference numerals 23 and 24 are switch operation openings, which are formed in the raising plate part c of the base 18 and the safety cover 17 at a portion corresponding to the raising plate part g of the switch operating member 21, and The opening 2 is formed on the inner surface of the front cover 3 when the front cover 3 is closed.
An operating tool 25 is provided which fits into the switches 3 and 24 and presses and slides the switch operating member 21. As the front cover 3 is closed, the switch operation member 21 is in a state in which the protrusions k formed on the horizontal plate part f of the switch operating member 21 slide on the horizontal plate part b of the base 18; , slides along the guide shaft 19, thereby closing the safety switches S.

26 is a spring that urges the switch operation member 21 in the switch opening direction;
As shown in FIG. Slide the safety switch S...
It is something that will open up the world.

28 is a first shaft pivotally supported by the guide shaft 19;
The restraining member 29 is a spring that urges the first restraining member 28 in a restraining direction, which will be described later _{. 2} is wound around the guide shaft 19 with both ends locked, and as shown in FIG.
When the switch operating member 21 is opened, the first restraining member 28 is swung by the biasing force of the spring 29 to a position corresponding to the restraining plate portion l connected to the operating member 21. It is designed to prevent the switch from moving in the closing direction.

Therefore, it is impossible to close the front cover 3 when the paper discharge section cover 8 is open, or it is impossible to move the switch operating member 21 by a screwdriver or the like through the openings 23 and 24.
It has excellent safety.

Reference numeral 30 denotes a switching member provided on the inner surface of the paper discharge section cover 8, and as shown in FIG. The first restraining member 28 is pressed against the biasing force of the spring 29 and switched to the restraining release state.

The switching member 30 is formed with an engagement hole n, and the switch operating member 21 is provided with the switch operating member 21, as shown in FIGS. A second restraining member 31 is provided which engages and disengages from the engagement hole n as the operating member 21 slides, so that the paper discharge section cover 8 can be opened when the front cover 3 is closed. It has become impossible to do so.

In summary, by opening and closing the front cover 3, the safety switches S... are opened and closed, and the paper discharge section cover 8 cannot be opened unless the front cover 3 is opened, and the paper discharge section The front cover 3 cannot be closed unless the cover 8 is closed.

Although the paper ejecting section cover 8 has been illustrated as a transport path opening/closing member, the copying machine main body 1 is divided into an upper unit and a lower unit, and the upper unit is arranged on the horizontal axis on the upstream side in the paper feeding direction with respect to the lower unit. The present invention may be implemented by using a so-called shell-type copying machine that can be opened and closed around the copying machine, and providing the switching member 30 in the upper unit of the copying machine as a transport path opening/closing member.

Further, the first restraining member 28 is connected to a spring 29.
Although it was made to urge in the restraining direction with the urging force of
A weight may be attached to the first restraining member 28 to urge it in the restraining direction, or the first restraining member 28 may be biased by the gravity of the first restraining member 28 itself.
8 may be biased in the restraining direction, and in the present invention, these restraining and biasing means using springs, weights, and own gravity are collectively referred to as the biasing mechanism 29.

(Effect of the invention) As explained above, the safety mechanism of the copying machine according to the invention has a mutual check mechanism for opening the transport path opening/closing member when the front cover is closed and for blocking the front cover when the transport path opening/closing member is opened. The main feature of this machine is that the mechanism for opening and closing the safety switch by opening and closing the front cover is integrated into a single base, and the safety mechanism described above can be easily integrated into the manufacturing of the copying machine itself. The safety mechanism can be manufactured on a separate line, and the safety mechanism can be easily assembled to the main body of the copying machine.Furthermore, since the mutual check mechanism is constructed by using the component parts, the safety mechanism components can be manufactured on a separate line. The number of parts can be reduced, and overall, it has become possible to improve assembly workability and reduce costs at the same time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the safety mechanism when the front cover and paper ejecting section cover are in the closed state, FIG. 2 is a perspective view of the safety mechanism with the front cover open, and FIG. FIG. 3 is a perspective view of the safety mechanism with both covers open. FIG. 4 is an overall perspective view of a copying machine incorporating a safety mechanism, and FIG. 5 is a sectional view of a paper discharge section. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 3... Front cover, 5... First horizontal axis, 8... Conveyance path opening/closing member (sheet discharge section cover), 9... Second horizontal axis, 18... Base, 21
...Switch operating member, 26...Spring, 2
8...First check member, 29...Biasing mechanism, 30...
Switching member, 31... second check member.

Claims (1)

[Scope of utility model registration request] A front cover that can be opened and closed in the front and back directions around a first horizontal axis, and a conveyance path opening/closing member that can freely open and close a conveyance path around a second horizontal axis perpendicular to the first horizontal axis, and the front cover can be opened and closed. The safety switch is opened by opening the safety switch, and the opening/closing of the transport path opening/closing member is checked when the front cover is closed, and the front cover is checked from being blocked when the transport path opening/closing member is opened. A safety mechanism for copying machines,
The safety switch is attached to a base fixed to the main body of the copying machine, and a switch operating member that closes the safety switch when the front cover is closed is biased in the switch opening direction by a spring. movably provided on the base in a state, and
A first restraining member for restraining movement of the switch operating member in the switch closing direction is provided on the base so as to be able to be freely switched to a state in which the restraint is released against the biasing force of the biasing mechanism, and the transport path is opened/closed. A switching member that switches the first check member to a check release state when the member is blocked is connected to the conveyance path opening/closing member;
A copying apparatus characterized in that a second check member is connected to the switch operation member to check the opening of the transport path opening/closing member by engaging with the switching member when the transport path opening/closing member is closed. Machine safety mechanism.