JPH0443885Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention consists of dividing the main body of a copying machine into an upper case and a lower case, or displacing the upper case with respect to the lower case upstream in the paper feeding direction. Through a horizontal connecting shaft perpendicular to the paper feeding direction on the side or downstream side,
Alternatively, the present invention relates to an opening/closing device for a so-called shell-type copying machine, which is connected to the rear side of the copying machine via a horizontal connection shaft in the paper feeding direction so as to be able to swing open and close.

[Conventional technology]

As an opening/closing device for the upper case of the above-mentioned shell-type copying machine, one of the connecting shaft and the shaft support, which fit vertically with each other, is provided in the upper case and the other in the lower case, and the connecting shaft is prevented from slipping out from the shaft support. A member is provided to connect the upper case to the lower case so as to be able to swing open and close around a connecting shaft, and an opening/closing regulating mechanism for regulating the opening/closing range of the upper case is provided between the upper case and the lower case. In some cases, a biasing mechanism for biasing the upper case in the opening direction is provided across the upper case and the lower case.

Conventionally, in the opening/closing device of such a shell-type copying machine, two torsion bars are provided on the connecting shaft portion in order to bias the upper case in the opening direction. As shown in FIGS. 5 and 6, shaft supports 17 are formed on both sides of the lower case D in the horizontal direction orthogonal to the paper feeding direction thereof, and a cylindrical connecting shaft is connected to the upper case U. 20 is fitted onto the shaft support 17 from above, and the connecting shaft 20 is attached to the connecting member 19.
While drilling a long hole d around the connecting shaft 20,
A pin hole a facing the elongated hole d is formed in the lower case D, while a hole f for fitting the connecting shaft 20 is bored in the retaining member 21, which is equipped with a pin e that engages in both the holes a and b. Then, by externally fitting the hole f to the connecting shaft 20 and engaging the pin e into both holes a and b, the upper case U is connected to the lower case D.
are connected to each other so as to be able to swing open and close within the range of the elongated hole d around the connecting shaft 20.

Before screwing the connecting member 19 to the upper case U, two torsion bars 27, 27 each having both ends bent, are attached to the connecting shaft 20.
The connecting shaft 20 is inserted into the shaft support 1.
When connecting the upper case U by fitting into the upper case U and fixing the retaining member 21 to the lower case D, at the same time, the torsion bar 27 is twisted and stretched between the upper and lower cases U and D, and opened to the upper case U. This is to apply a directional biasing force.

[Problem that the invention attempts to solve]

However, it is extremely difficult to assemble and connect the upper case U to the lower case D by twisting the torsion bar 27 while holding the upper case U in a state where the opening is restricted. A worker holds the retaining member 21 while twisting the two torsion bars 27, 27 respectively.
It required two, sometimes three, workers to fasten it, which had the disadvantage of poor operability and workability.

The present invention was devised in view of the above-mentioned circumstances, and aims to rationally eliminate the above-mentioned drawbacks while being a simple improvement.

[Means for solving problems]

In order to achieve the above object, the present invention provides an opening/closing device for a shell-type copying machine as described above, in which the biasing mechanism is configured with a coil spring, and the biasing mechanism is configured with a coil spring, and is integrated with the connecting shaft or concentrically with the connecting shaft. The coil spring is externally fitted onto a cylindrical member that is fitted concentrically to a shaft member, and when the upper case is connected to the lower case and the upper case is regulated to open and close, the coil spring is The present invention is characterized in that the cylindrical member is fitted onto the connecting shaft or the shaft member while a biasing force is applied to open the upper case.

〔Example〕

Hereinafter, embodiments of the present invention will be explained based on the drawings. Fig. 1 shows the details of the upper case opening/closing device A, and Fig. 2 schematically shows the entire so-called shell type copying machine. The machine is equipped with a contact glass 1 and a document holder 2 for the contact glass 1 on a copying machine main body 3.
A charging device 5, a developing device 6, a transfer device 7, a recording paper separation device 8, and a cleaning device 9 are installed around the photoconductor 4 in the rotation direction of the photoconductor 4 in that order. R, and an exposure device 10 with a moving optical system is provided in the space below the contact glass 1, and a paper feeding and conveying device 12 that conveys the recording paper in the cassette case 11 to the transfer device 7 is separated. A paper discharge conveying device 14 that transports the subsequent recording paper to the fixing device 13 and a pair of paper discharge rollers 16 that discharge the fixed recording paper onto a tray 15 are provided.

The copying machine main body 3 is divided into two parts, an upper case U and a lower case D, with the paper feeding path as a boundary, and
An opening device A is provided on the upstream side in the paper feeding direction across both cases U and D, and swings the upper case U containing the photoreceptor 4, developing device 6, cleaning device 9, exposure device 10, etc. It can be opened and closed.

The opening/closing device A is provided with two sets of structurally symmetrical structures on both sides of the copying machine main body 3 in a direction perpendicular to the paper feeding direction, one of which is shown in FIG. It is shown in

This opening/closing device A has a shaft support 17 that is open at the top.
is formed in the lower case D, and the shaft support 17
A pin hole a and a screw hole b are formed in the lower part of the holder, and a connecting member 19 with a bent spring seat 18 is fixed to the upper case U with screws c and c. A connecting shaft 20 that fits into the shaft support 17 from above is provided on the connecting member 19, and a long hole d facing the pin hole a under the fitting is formed in the connecting member with the axis of the connecting shaft 20 as the center. 19.

Then, the connection shaft 20
A hole f for fitting the screw h into the screw hole b and an insertion hole g for the screw h screwed into the screw hole b are formed, and the retaining member is attached to the connecting shaft 20 fitted to the shaft support 17. 21, the pin e is inserted into the pin hole a and the elongated hole d, and the screw h
By screwing into the screw hole b through the insertion hole g, the connecting shaft 20 is fixed to the lower case D in a manner that prevents it from coming off.

As shown in FIGS. 3 and 4, the case is in a closed state
The upper case U can be swung open and closed around the connecting shaft 20 in the case open state Y in which the upper case U is in contact with the upper case U.

Furthermore, by inserting the pin e between the pin hole a on the lower case side and the elongated hole d on the upper case side, an opening/closing regulating mechanism 22 for regulating the opening/closing range of the upper case is constructed. , a long hole around the connecting shaft 20 is formed on the lower case side, and a pin screw hole is bored in the upper case side in a portion facing the long hole, and a pin is inserted into the pin screw hole through the long hole. The opening/closing range of the upper case U can be restricted by a structure in which the upper case U is screwed, or by a structure in which stopper members are provided at the portions corresponding to both ends of the elongated hole and a swing regulating member is provided between the stopper members. That is, the specific structure of the opening/closing regulating mechanism 22 can be modified in various ways.

Although not shown, a lock mechanism for maintaining the closed state X of the upper case U is provided on the free end side of the lower case D and the upper case U which can be opened and closed. The opening/closing device A is provided with a biasing mechanism 23 that switches and holds the upper case U in the open state Y in the unlocked state.

This biasing mechanism 23 is composed of a coil spring S having biasing pieces i and j for the spring seats 18 and 24 connected to the connecting member 19 and the lower case D, and the coil spring S
is externally fitted in front of a cylindrical member 26 with a flange that is fitted substantially tightly to the connecting shaft 20, and as shown in FIG. After connecting to the lower case D, the upper case U is brought into the open state Y, and the cylindrical member 26 is externally fitted to the connecting shaft 20,
During the fitting, the coil spring S
While bending and deforming the coil spring S so as to apply a biasing force to open the upper case, the biasing pieces i and j are moved to the spring seats 18 and 24.
As shown in FIG.

Since the biasing mechanism 23 is set after the upper case U is connected to the lower case D, this series of operations can be easily carried out by one person.

Incidentally, by adopting a configuration in which the coil spring S is externally fitted onto the connection shaft 20 itself, the series of operations described above can be performed by one person. Normally, the coil spring S is deflected in a direction that reduces the diameter. In this case, if the coil spring S is fitted externally to the connecting shaft 20 itself, the coil spring S is bent in the direction of reducing the diameter. I don't like that it gets tightened and makes it difficult to insert the spring.

In this regard, since the coil spring S is previously fitted externally onto the cylindrical member 26 and the cylindrical member 26 is fitted onto the connecting shaft 20, the coil spring S is No tightening force is applied to the connecting shaft 20, making the spring setting work extremely easy and highly workable.

A shaft member that is concentric with the connecting shaft 20 is provided on the retaining member 21, and the shaft is integrated into the connecting shaft 20 with the retaining member 21 fitted to the connecting shaft 20. The cylindrical member 26 may be fitted into the member, or the cylindrical member 26 may be integrally connected to the retaining member 21 and the pin e may be elongated to extend the open range of the upper case U. The coil spring S may be locked to the spring seats 18 and 24 after the regulation and the connection of the upper case U to the lower case D are completed.

Further, the connecting shafts 20 of the two sets of opening/closing devices A may be configured as a single shaft.

[Effect of idea]

As explained above, the opening/closing device for a shell-type copying machine according to the present invention applies a biasing mechanism composed of a coil spring to the upper and lower cases under the connection of the upper case to the lower case and under the regulation of the opening/closing range of the upper case. It is assembled by crossing over, and the process of flexing and deforming the coil spring when assembling the biasing mechanism is the same as in the past, but this work is extremely easy because it is performed while the upper and lower cases are connected. Furthermore, the connection of the upper and lower cases and the assembly of the biasing mechanism can be easily performed even by one person, and since the coil spring is fitted externally to the cylindrical member, the work of setting the coil spring is also easy. Although it is a simple improvement, it has become possible to rationally eliminate the conventional drawbacks, and in turn, it has become possible to improve both the workability and operability of the switchgear assembly.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an exploded perspective view of the opening/closing device, Fig. 2 is a schematic vertical sectional view of the entire shell-type copying machine, and Figs. 3 and 4 are explanations of switching between opening and closing of the upper case. It is a diagram. and Figures 5 and 6.
The figures show a conventional example, FIG. 5 is an explanatory diagram of the arrangement of the torsion bar, and FIG. 6 is an exploded perspective view of the opening/closing device. 3... Copying machine main body, 17... Axis support, 20...
Connection shaft or shaft member, 21... Removal prevention member, 22
...Opening/closing regulation mechanism, 23(S)...Biasing mechanism (coil spring), 26...Cylinder member, D...Lower case, U...Upper case.

Claims (1)

[Scope of utility model registration request] The main body of the copying machine is divided into an upper case and a lower case, and one of a connecting shaft and a shaft support that fit vertically with each other is provided in the upper case and the other in the lower case, and the connection to the shaft support is provided. A shaft retaining member is provided to connect the upper case to the lower case so as to be able to swing open and close around the connecting shaft, and an opening/closing regulation mechanism for regulating the opening/closing range of the upper case is provided between the upper case and the lower case. In an opening/closing device for a seal-type copying machine, the opening/closing device is provided between the upper case and the lower case, and a biasing mechanism for biasing the upper case in an opening direction is provided across the upper case and the lower case,
The biasing mechanism is constituted by a coil spring, and the coil spring is attached to a cylindrical member that is fitted concentrically to the connecting shaft or a shaft member that is coaxially integrated with the connecting shaft. When the upper case is fitted to the lower case and the upper case is regulated to open and close, the coil spring has a biasing force for opening the upper case, and the cylindrical member is connected to the connecting shaft or shaft member. An opening/closing device for a seal type copying machine, characterized in that the opening/closing device is fitted with a seal type copying machine.