JP2589708Y2 - Opening / closing device for original cover and copier equipped with this opening / closing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for a document pressure plate suitable for use in a printing machine, a copying machine, and the like, and a copying machine equipped with the opening / closing device.

[0002]

2. Description of the Related Art Conventionally, an original cover plate for covering an upper surface of a contact glass of a copying machine or the like is generally attached to a main body of the apparatus so as to be freely opened and closed via a pair of left and right opening and closing devices. As an opening / closing device for this type of original cover, a support member for the original cover is rotatably mounted on a mounting member fixed to the apparatus main body via a hinge pin, and is attached to a free end side of the support member. It is known that a compression spring is elastically provided between a position where the hinge pin of the member is attached and a position different from the position where the hinge pin is attached.

[0003]

[Problem to be Solved by the Invention] The original cover needs to be evenly pressed on the contact glass at the time of closing in order to bring the original into close contact with the contact glass. There was a problem that a difference in height between the right and left sides at the time of closing occurred due to torsion, mounting errors of the opening / closing device and other members, and it was difficult to perform uniform crimping.

Therefore, conventionally, in order to adjust the height, mounting adjustment such as interposing a spacer between the mounting member of the opening / closing device and the main body of the device is performed on an assembly line. .

It is an object of the present invention to provide an opening / closing device for an original cover having a height adjusting function without adjusting the height, and a copying machine equipped with the opening / closing device. And

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a mounting member mounted on a main body of a device, and one end of the mounting member is rotatably mounted via a first hinge pin. A first support member, a spring resiliently provided between the first support member and the mounting member for rotationally biasing the first support member in one direction, and a free end of the first support member. On the end side, in the same direction as the first support member,
Via a second hinge pin so that it can rotate only in one direction
A second support member axially attached to the second support member, and an upper surface of a contact glass attached to the second support member on the apparatus body side
And extend the rear end to the hinge pin side.
And a first support at the rear end of the original cover.
A control member mounted in proximity to the support member, and pushes down the control member together with the original cover Previous Symbol mounting member side
The first support member or the first hinge pin and the control member
And a spring elastically provided between the original and the original
The second support member and the first support portion when the plate is closed
It is configured to engage with a material .

This invention also uses a pair of opening and closing devices configured as described above, mounting each mounting member of each of the opening and closing devices on the upper part of the apparatus main body, and attaching one end of the original pressure plate to each of the second support members. A gap is provided between each control member attached to the original cover and each first support member or each first hinge pin.
A pulling is provided .

[0008]

The original cover attached to the second support member is
The spring elastically provided between the attachment member and the first support member allows the spring to be opened lightly without feeling its original weight, and is stably held when the weight of the original cover and the elasticity of the spring are balanced. The original cover is elastically provided between the control member and the first support member or the first hinge pin.
The spring allows the second support member to be constantly pushed down toward the mounting member with the pivot point of the second support member as a fulcrum.

Therefore, when a pair of the opening / closing devices configured as described above are used for opening / closing the original cover, the floating of the original cover on the contact glass is controlled by the control member and the first support.
This can be corrected by a spring elastically provided between the holding member and the first hinge pin .

[0010]

1 to 3 show an embodiment of the present invention. In FIGS. 1 to 3, reference numeral 1 denotes a mounting member which is fixed to, for example, a rear upper portion of an apparatus main body 2 of a copying machine. On both side plates 1a, 1a of the mounting member 1, both side plates 3a, 3a of a first support member 3 serving also as a spring case are rotatably mounted via first hinge pins 4. A slider 5 is slidably housed inside the first support member 3, and the slider 5 is provided on both lower side plates 3 a, 3 a on the lower side of the first support member 3, and is mounted on the elongated holes 3 b, 3 b. The operating pin 6 and the groove 5a provided at the lower end thereof are fitted. A pair of large and small springs 7a, 7a, 7b, 7b are elastically provided between the slider 5 and the top plate 3c of the first support member 3, and the slider 5 has an elasticity of the springs 7a, 7a, 7b, 7b. It is pushed by the operating pin 6 in opposition, and can slide by the length of the long holes 3b, 3b. Reference numeral 8 denotes a holding pin for reinforcing the top plate 3c. On both side plates 1a, 1a of the mounting member 1,
The control pin 9 is located at a position different from the shaft position of the first hinge pin 4.
The control pin 9 and the operating pin 6 are connected by both side plates 10a, 10a of the connecting member 10. In addition, both side plates 10a, 10
In the portion connected to the operating pin 6 of FIG.
0b is provided, and the operating pin 6 and the long holes 10b, 10b
A gap is provided between the holes b and b by the length of the long holes 10b and 10b.

Attachment portions 3d, 3d project from both side plates 3a, 3a of the first support member 3, and are attached to the attachment portions 3d, 3d via second hinge pins 11 at both side plates of the second support member 12. 12a, 12a are rotatably supported by the shaft. A part of the original cover 13 is attached to the second support member 12, as shown in FIG.
Protruding pieces 12b, 12 protruding from both side plates 12a, 12a
b (only one is displayed) engages with the attachment portions 3d, 3d of the first support member 3 when the original cover 13 is closed. Original pressure plate 1
3 is on the contact glass (not shown) of the apparatus main body 2 side
While covering the surface, the portion extending to the first hinge pin 4 side of the rear end, the control member 14 of a substantially angle shape first supporting
The control member 14 is fixed close to the holding member 3.
The lower hanging locking member 15 locks one end 16 a of the torsion spring 16 wound around the first hinge pin 4. The other end 1 of the torsion spring 16
6b is locked by a locking member 3e erected from the first support member 3.

A tension spring may be provided between the control member 14 and the first support member 3 instead of the torsion spring.

Therefore, when the original cover 13 is closed, the operating pin 6 is connected to the slots 3b, 3b of the first support member 3.
b, located on the upper end side of the connecting member 10,
0b is in pressure contact with the lower end of the spring 7a.
7b, 7b are sliders 5 pushed by operating pins 6.
In a compressed state. By opening the original cover 13, the slider 5 slides and pushes the operating pin 6 to move to the lower end side of the elongated holes 3 b and 3 b. It remains pressed against.

[0014] about as original cover 13 is shown in FIG. 4 6
When opened to 0 ° , the operating pin 6 comes into contact with the lower ends of the long holes 3b, 3b, and the elasticity of the springs 7a, 7a, 7b, 7b does not act on the first support member 3 at this position.

From this position, the original cover 13 is opened around the first hinge pin 4 without being affected by the elasticity of the springs 7a, 7a, 7b, 7b. Then, the operation pin 6 is stopped by contacting the upper ends of the long holes 10b, 10b of the connecting member 10.

Next, as shown in FIG.
Each of the mounting members 1, 1,.
Is attached to, for example, the main body 2 of the copying machine.
6 and FIG. 6 due to torsion of the crimping plate 13 and other causes.
For example, as shown by an imaginary line in FIG.
Floating above the attached contact glass (not shown)
In the event that the switchgear A on the left
Mounting via the control member 14 by the traction force of the ring 16
The document pressing plate 13 is always attached to the member 1 but to the apparatus main body 2 side.
Since it is pushed down, it is shown by a solid line in FIGS.
The original cover 13 is pressed onto the contact glass.
The above-mentioned float can be automatically absorbed.
Things. As shown by another imaginary line in FIG.
When the floating occurs on the right side of the original cover 13,
Opening and closing device A functions as described above,
It can be absorbed.

In the above embodiment, the original pressing plates A, A
An opening / closing device in which the elastic means ( spring) for urging the opening in the opening direction is specially devised has been described, but the gist of the present invention is not limited to the opening / closing device. It can be widely applied to other devices using a compression spring or a tension spring.

[0018]

[Effects of the invention] Since the invention was constructed as described above,
In addition to automatically absorbing the floating of the original cover, the original cover can be uniformly pressed on the contact glass at all times, so that the original can be uniformly pressed on the contact glass.
It is possible to obtain the effect of eliminating the necessity of performing the mounting adjustment on the assembly line unlike the conventional one.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a switchgear embodying the present invention.

FIG. 2 is a rear view of the switchgear implementing the present invention.

FIG. 3 is a side view of the switchgear implementing the present invention.

FIG. 4 is an explanatory diagram illustrating the function of the opening / closing device when the original cover is opened by about 60 °.

FIG. 5 is an explanatory diagram illustrating the function of the opening / closing device when the original cover is opened by about 90 °.

FIG. 6 is an explanatory diagram for explaining the gist of the present invention.

FIG. 7 is an explanatory diagram for explaining the function of the switchgear according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mounting member 2 apparatus main body 3 first support member 3b long hole 4 first hinge pin 5 slider 6 operating pin 7a spring 7b spring 9 control pin 10 connecting member 10b long hole 11 second hinge pin 12 second support member 13 document crimping plate 14 Control member 15 Locking member 16 Torsion spring

Claims (2)

(57) [Scope of request for utility model registration] 1. A mounting member mounted on an apparatus main body, a first supporting member having one end pivotally attached to the mounting member via a first hinge pin, and the first supporting member being moved in one direction. A spring resiliently provided between the first support member and the mounting member for biasing the rotation; and a free end of the first support member in the same direction as the first support member.
Through the second hinge pin so that it can rotate only in the
A second support member mounted on the second support member, and an upper surface of the contact glass on the device body side attached to the second support member.
An original pressing plate having a rear end extending to the hinge pin side, and a first supporting member attached to a rear end of the original pressing plate.
A control member mounted close to the member, and a control member for pushing down the control member together with the document pressing plate toward the mounting member.
The first support member or the first hinge pin and the control member
The original pressure plate
The second support member and the first support member when closing
And an opening / closing device for the original cover. 2. A pair of the opening and closing devices according to claim 1, wherein each mounting member of each of the opening and closing devices is mounted on an upper portion of the apparatus main body, one end of a document pressing plate is mounted on each second support member, and the document pressing plate is attached to the document supporting plate. Each mounted control member and each first support member or each
A copying machine characterized in that a spring is provided between the first hinge pin and the first hinge pin .