JPS60104959A - Copying machine - Google Patents

Abstract

PURPOSE:To discharge paper stopped in a fixing part easily by constituting an upper/lower separation type copying machine so that pressure applied to two rollers forming the fixing part at the non-separation time of the upper and lower units of the copying machine is released at the separation time. CONSTITUTION:When the upper and lower units 1, 2 are separated, a straight beam body 4 and a straight part of a bent member 5 on the straight beam body 4 side from a bent point are aligned in the same direction and said state is fixed. Consequently, the closing of the upper and lower units 1, 2 is interrupted. The other part of the bent member 5 on the elastic member 6 side is moved downward by a circular motion around the bent point of the bent member 5 and the interval between the bent member 5 expanding the elastic member 6 and a holding member 9 is narrowed, so that the expanded state of the elastic member 6 is released. Consequently, the holding member 9 is lowered by its tare weight and the lower roller 8 coupled with the holding member 9 is also lowered, so that the pressurized atate to the upper and lower rollers 7, 8 are released and the stopped paper is easily discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine, and more particularly to an improvement in a shell-type copying machine having an upper unit and a lower unit.

<Prior Art> Conventionally, in a shell type copying machine, when a paper jam occurs in the fixing section, in order to clear the paper jam, it is necessary to It is necessary to loosen the pressure between the upper and lower rollers and remove the paper held between the upper and lower rollers, but in order to do so, it is not enough to simply separate the upper and lower rollers; must be turned off. If you do not turn on the power, you will need to remove the jammed paper using the attached knob, or grasp the paper with your hand and pull it. The force acts in a concentrated manner and may cause the wire to be cut off midway.

<Object of the Invention> In view of the above, the present invention provides a shell-type copying machine that includes an upper unit and a lower unit. It is an object of the present invention to easily solve paper jams in a fixing section of a copying machine by releasing pressure on a roller.

<Example> The present invention will be explained in detail below.

First, one embodiment of the present invention will be described.

1 and 2 are partially schematic structural diagrams of the copying machine according to this embodiment, with FIG. 1 showing the state when not separated, and FIG. 2 showing the state when separated.

In FIG. 1, 1 is an upper unit and 2 is a lower unit. One end of the upper unit 1 and the lower unit 2 is inserted through a common shaft 3, and using the shaft 3 as a hinge, the upper unit 1 and the lower unit 2 are separated (opened) so that the other end is expanded to the maximum width. The structure is such that

The opening angle of the upper unit 1 and the lower unit 2 is regulated by three connected members.

The three members shown in the figure are a straight rod indicated by 4, a bending member indicated by 5 which is bent in the middle, and an elastic member (spring) indicated by 6. One end of the linear rod 1 is connected to the upper unit 1, and the other end of the linear rod 1 is connected to the bending member 5. The bent portion of the bending member 5 is pivotally supported so that it can rotate about the bent portion. The end of the bending member 5 on the side not connected to the linear rod 4 is locked to the elastic member 6. Note that the above-mentioned joints between the upper unit 1 and the straight rod 4 and the joints between the straight rod 4 and the bending member 5 are overlaid so that the connection angle can be freely changed, and the mandrel passes through the center. are doing.

Further, the lower unit 2 is provided with opposing upper and lower rollers 7.8 forming a fixing section. This lower roller 9 is set so that it can rotate freely around the end fixing point A of the gripping member 9 which fits into the recess and grips the pivot shaft that supports the rotation center of the lower roller 9. .

As described above, the elastic member 6 has one end locked to the bending member 5, but the other end is engaged with the gripping member 9, and the elastic member 6 is held by the gripping member 9 by physical elastic force. It is moving so as to lift the material 9 upwards (toward the upper unit 1 side). Therefore, the lower roller 8, which moves together with the gripping member 9, is also raised upward (toward the upper unit 1 side) and comes into strong contact with the opposing upper roller 7.

This non-separated state of the upper unit 1 and the lower unit 2 is maintained by a claw B formed on the opposite side of the upper unit 1 with the shaft 3 being engaged in a recess C of the lower unit 2.

Now, when the upper unit 1 and the lower unit 2 are separated, as shown in FIG.
The linear portions on the side of the linear rod 4 from the bending point are aligned in the same direction and fixed by an engagement mechanism (not shown). This prevents the closing operation of the upper unit 1 and lower unit 2.

Then, due to the circular movement of the bending member 5 centered on the bending point, the bending member 50 on the elastic member 6 side moves downward (toward the lower unit 2 side), and the bending member 5 that stretches the elastic member 6 and the The distance from the gripping member 9 becomes narrower, and the tensioned state of the elastic member 6 is released.

Then, the gripping member 9 lowers due to its own weight, and accordingly,
The lower roller 8 connected to the gripping member also descends, and the pressure between the upper roller 7 and the lower roller 8 is released.

Next, other embodiments of the present invention will be described.

3 and 4 are partially schematic structural diagrams of the copying machine according to this embodiment, with FIG. 3 showing the state when not separated, and FIG. 4 showing the state when separated.

In FIG. 3, 1' is an upper unit, and 2' is a lower unit. One end of the upper unit 1' and the lower unit 2' is inserted through a common shaft 3', and using the shaft 3' as a hinge, the other ends of the upper unit 1' and the lower unit 2' are expanded to the maximum @. It has a structure that opens in different ways.

The lower unit 2' is provided with an upper roller 7' and a lower roller 8' facing each other and forming a fixing section.
The upper roller unit 10 and the lower roller unit 11 move integrally.

The upper roller unit 10 is rotatable about a fulcrum, and the lower roller unit 11 is rotatable about a fulcrum E. Further, the lower roller unit 11 supports the fulcrum E with an elastic member (spring) 12.
The upper roller unit 10 is urged upward (toward the upper unit 1' side) around the fulcrum, and furthermore, the recessed portion F of the upper roller unit 10 is pressed by the protrusion 13 of the upper unit 1', and the upper roller unit 10 is urged downward (toward the upper unit 1' side) around the fulcrum. (to the lower unit 2' side) has been awarded a positive award. Therefore, the upper roller 7' of the upper roller unit 1' and the lower roller 8' of the lower roller unit 2', which face each other and adhere to each other, strongly adhere to each other.

Now, when the upper unit 1' and the lower unit 2' are separated, the protrusion 13 of the upper unit 1' is separated from the recess F of the upper roller unit 10, as shown in FIG. Therefore, the upper roller 7' of the upper roller unit 10 is lifted by the urging force of the lower roller 8' of the lower roller unit 11. And there is no force to suppress the lifting from above. That is, the upper roller 7' rests on the lower roller 8' under its own weight.

In this way, the pressure applied between the upper roller 7' and the lower roller 8' was released.

Effects> As described above, according to the present invention, in a shell-type copying machine having an upper unit and a lower unit, the upper unit and the lower unit 11. Since the pressure applied to the two rollers forming the fixing section is released when the toe is not separated, paper jams in the fixing section can be removed extremely easily.

[Brief explanation of drawings]

1 and 2 are partial schematic structural diagrams of a copying machine according to one embodiment of the present invention, and FIGS. 3 and 4 are partial schematic diagrams of a copying machine according to another embodiment of the present invention. It is a structural diagram. 1.1'...upper unit), 2.2'...lower unit,
3.3'... Shaft, 4... Straight member, 5... Bent member, 6°12... Elastic member, 7.7'... Upper roller,
8, 8'... lower roller, 9... gripping member, 10...
・Upper roller unit, 11...lower 0 5:x,=soto, 13...protrusion, A, D, E...fulcrum, B ・claw,
C, F... concavity. Agent Patent Attorney Aihiko Fukushi (and 2 others) Figure 2 Figure 1/2 Figure 3/2 Figure 4

Claims (1)

[Claims] 1. Upper and lower separated type (equipped with an upper unit and a lower unit)
1. A copying machine (shell type), characterized in that pressure applied to two rollers forming a fixing section is released when the upper unit and the lower unit are not separated.