JP3194632B2 - Document pressure plate opening and 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 original cover opening / closing device for a printing machine or a copying machine.

[0002]

2. Description of the Related Art Conventionally, a mounting member is attached to a main body of a copying machine or the like, and a support member pivotally attached to the mounting member via a hinge pin so as to rotate in the same direction as the opening and closing direction of the original cover is provided. A compression coil spring for urging the support member in the opening direction is provided between the support member and the mounting member, and a lift member is provided on a free end side of the support member so as to rotate in a direction opposite to the support member. Axle via pin,
A document pressing plate is attached to the lift member, and a torsion spring is provided between the support member and the lift member to bias the lift member in a direction overlapping with the support member, and the compression coil spring does not buckle. It is known that a pair of spring holding members are arranged above and below the compression coil spring by being supported on a support pin attached to the mounting member and the support member by crimping one end thereof or using an E-ring. is there.

Further, the lifting member and the control member having the above-described configuration are omitted, and an attachment member attached to the main body of a copying machine or the like, and the attachment member is rotated in the same direction as the opening / closing direction of the original cover. A supporting member having one end pivotally attached thereto via a hinge pin, and one end portion caulked at a position different from the hinge pin of the mounting member and a free end side of the supporting member, or an E-ring is used. A pair of support pins attached so as not to come out during use, a pair of spring holding members having end portions supported by the respective support pins, and a compression coil elastically provided between the pair of spring holding members. A spring and a spring are also known.

[0004]

The prior art opening and closing device of the prior art requires a torsion spring having a strong torque when the original cover is heavy. In addition to this, there is a problem in that a strong operation force is required, the operability is problematic, and the structure is complicated, the number of parts is large, and the production cost is high. In addition, both of the opening and closing devices have a problem in that when mounting the support pin to the mounting member or the support member, caulking or the use of an E-ring increase the cost of parts and processing.

SUMMARY OF THE INVENTION An object of the present invention is to provide an opening / closing device for a manuscript crimping plate for a copying machine or the like in which the structure is simplified as much as possible to reduce the manufacturing cost and the function is improved.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to an apparatus mounted on an apparatus body such as a copying machine.
Mounting member, and the opening and closing direction of the original cover
One through the hinge pin to rotate in the same direction as
A support member having its end portion pivotally mounted, and a free end side of the support member
To rotate in the direction opposite to the opening and closing direction of the original cover.
A lift member having one end pivotally mounted via a support shaft,
Rotate by contacting one end beyond the fulcrum to the approximate center of the support shaft
At one end, the shaft is mounted so that it can be
Control member locked to the
The support member and the control unit are wound around the support shaft to the left and right.
A pair of torsion springs arranged between the material and
The hinge pin and the support shaft of the mounting member and the control member are different.
And a pair of bearing pins
A pair of swivels, each of which has its end supported by a pin and
A spring holding member and a pair of spring holding members.
It is composed of a compression coil spring
A pair of spurs that compress and compress the compression coil spring
While holding with the ring holding member, this spring holding
One of the members is pivoted with the lift member around the support shaft.
Rotate the bearing pin to the bearing, the other side of the mounting member
A pair of notches provided on the plate at positions different from the hinge pins
And one or both of the bearing pins are wrapped around the center.
The spring holding member has a circumferential shape.
A projection that fits into the groove is provided.

At this time, the present invention provides the above-mentioned pair of bearing pins.
Either or both of them have a shape with small diameter portions at both ends.
The small diameter portion of the above is supported by the mounting member or the supporting member.
Can be.

[0008]

When the original cover is opened, it is opened lightly with its weight reduced by the elasticity of the compression coil spring elastically provided between the mounting member and the support member, and the elasticity of the spring and the weight of the original cover are reduced. When the hand is released when the balance is reached, the original cover stops at that position. At this time, since the lift member is urged to rotate in a direction overlapping with the support member by the combined force of the respective elastic forces of the torsion spring and the compression coil spring, the lift member does not reverse due to the weight of the opened original cover. . When the original is a thick three-dimensional original such as a book, close the open original cover and bring it into contact with the end of the three-dimensional original, and apply a slight force to close the original. The support shaft rotates about the support shaft against the urging force of the above, and the upper surface of the three-dimensional original can be covered in the horizontal direction by the original cover.

On the other hand, either or one of the bearing pins is provided with a circumferential groove at the center, or both ends are reduced in diameter.
When a protrusion is fitted into the circumferential groove or a small diameter portion is supported, the end of the support pin is swaged or E
Even without using the ring, the bearing pin does not come out of the mounting member or the support member.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a copying machine according to an embodiment of the present invention; FIG. I have. The mounting member 1 may be fixed on the rear upper plate a with screws or the like, or may be integrally formed with the rear upper plate a. A hinge pin 2 is provided on one side of both side plates 1a, 1a of the mounting member 1.
The support member 3 rotatably pivotally attaches one end of the both side plates 3a, 3a. Both side plates 3 of this support member 3
A lift member 4 is provided on both sides 4a, 4a
a is rotatably mounted on a support shaft 5, and the rear end of the original cover B is fixed to the lift member 4.
The lift member 4 may be formed integrally with the original cover B.

A control member 6 is rotatably attached to a substantially central portion of the support shaft 5 by pivotally inserting through holes 6c, 6c provided in both side plates 6a, 6a. The upper part is locked by notches 4c, 4c provided on the top plate 4b of the lift member 4, as shown in FIG. A pair of torsion springs 7 are arranged on both sides of the control member 6 while being wound around the support shaft 5 with the control member 6 interposed therebetween, and are elastically provided between the support member 3 and the control member 6. The control member 6 is always urged to rotate clockwise together with the lift member 4 by the torsion springs 7. As shown in FIGS. 1 and 5, hinge pins 3 and support shafts 5 are provided on both side plates 1a, 1a, 6a and 6a of the mounting member 1 and the control member 6, respectively.
The notches 1b, 1b (only one is displayed) and 6b, 6b are formed by making cuts from positions different from the mounting positions. A support pin 9 provided with a peripheral groove 9a at the center as shown in FIG. 4 is mounted on the notches 1b and 1b, and a support pin 10 is provided with small diameter portions 10a at both ends in the notches 6b and 6b. , 10a.

A spring holding member 11, 12 fitted to each bearing pin 9, 10 has a bearing 11a, 1
2a, and the spring holding member 1
A pair of compression coil springs 13, 1
3 are provided. The indication symbol 12 of the spring holding member is made of an iron plate, and its bearing portion 12a is made of a synthetic resin as shown in FIG. This bearing portion 12a
Has a pair of legs 12b, 12b and a bearing groove 12c, and is configured to lock the legs 12b, 12b to the spring holding member 12. The spring holding member 11 is made of a synthetic resin, and particularly, as shown in FIG.
A projection 11b is provided at the center of the bearing portion 11a having a protrusion. The projection 11b fits into the peripheral groove 9a of the support pin 9 to prevent the support pin 9 from sliding left and right.

FIG. 7 shows an example of use of the original cover opening / closing apparatus according to the present invention. When the original is a thick three-dimensional original 14 such as a book, the original cover B is closed and the end of the three-dimensional original 14 is closed. When the original pressure plate B is further pressed down when it touches,
The original cover B is torsion coil springs 7, 7 and compression coil springs 13, 13 which are urged clockwise through the control member 6 and the lift member 4 about the end of the three-dimensional original 14 as a fulcrum. Is rotated in the counterclockwise direction against the elasticity of the solid document 14 so that the upper surface of the three-dimensional document 14 can be covered in a horizontal state.

The bearing pin according to the present invention can be implemented in a known configuration other than the original cover opening / closing device described above. Although not shown in the drawings, the known document pressing plate opening / closing device has the following configuration, for example.

An attachment member attached to the main body of a copying machine or the like, a support member having one end pivotally attached to the attachment member via a hinge pin so as to rotate in the same direction as the opening / closing direction of the original cover; A pair of support pins mounted on a position different from the hinge pin of the mounting member and on a free end side of the support member, a pair of spring holding members having their respective ends supported by the respective support pins, and a pair of spring holding members The compression coil spring is provided between the members.

The present invention relates to an apparatus of this known construction,
One or both of the pair of support pins have a shape in which a peripheral groove is provided at a central portion, and a projection that fits into the peripheral groove is provided on the spring holding member, or one or both of the pair of support pins are provided. Both have a shape in which a small diameter portion is provided at both ends, and this small diameter portion is pivotally supported by the mounting member or the support member.

[0017]

As described above, the present invention has the following advantages.

According to the first aspect of the present invention, since the combined elasticity of the compression coil spring and the torsion spring is used as the biasing means for controlling the inversion and automatic return of the original cover, the original cover is inverted and automatically returned. In addition to smooth operation, operability can be significantly improved,
The structure for covering the top surface of the three-dimensional original horizontally with the original pressure plate is simplified, and in particular, the support pin
Since the installation is simple, the production cost can be greatly reduced, and the number of failures is small and the yield is high.

According to a second aspect of the present invention, the first and second aspects are provided.
With the same effect, the use of caulking and the use of E-rings can be omitted, and the mounting of each bearing pin becomes easy, and the number of parts and labor can be reduced, further reducing the manufacturing cost.
Is what you can do .

[Brief description of the drawings]

FIG. 1 is a side view of an original cover opening / closing device according to the present invention.

FIG. 2 is a plan view of the original cover pressing device according to FIG. 1;

FIG. 3 is a side sectional view of the original cover pressing device according to FIG. 1;

FIG. 4 is a plan sectional view of the document pressing plate opening / closing device according to FIG. 1;

FIG. 5 is a perspective view of a control member.

FIG. 6 is a perspective view of a bearing portion of the spring holding member.

FIG. 7 is an explanatory view showing an example of use of the original cover pressing device according to the present invention.

[Explanation of symbols]

 A Body of Copying Machine, etc. B Original Crimping Plate 1 Attachment Member 1b Notch 2 Hinge Pin 3 Support Member 4 Lift Member 5 Support Shaft 6 Control Member 6b Notch 7 Torsion Spring 9 Support Pin 9a Peripheral Groove 10 Support Pin 10a Small Diameter Section 11 Spring Holding Member 11b Projection 12 Spring holding member 13 Compression coil spring

Claims (2)

(57) [Claims] 1. An apparatus which is attached to an apparatus body such as a copying machine.
The mounting member and the mounting member
Its one end through hinge pin to rotate in one direction
A support member having a shaft attached thereto, and a front end toward a free end side of the support member.
Rotate the cover in the opposite direction to the opening and closing direction of the original cover.
A lift member having one end pivotally mounted via a support shaft;
Rotation is possible by contacting one end beyond the fulcrum with the approximate center of the shaft
And one end beyond its pivot point is attached to the lift
A control member locked to the material and left and right
The support member and the control member while being wound around the support shaft.
A pair of torsion springs disposed between
The hinge pin and the support shaft of the mounting member and the control member are at different positions.
And a pair of bearing pins attached to the
A pair of splices whose ends are supported on each other
Between the spring holding member and the pair of spring holding members.
It is composed of a compression coil spring
A pair of springs that are fitted and retracted by coil springs
And a spring holding member.
Is pivoted together with the lift member about the support shaft as a fulcrum.
Bearing on the other side of the mounting member.
A pair of notches provided at positions different from the hinge pins
And one or both of the bearing pins have a circumferential groove in the center.
And the peripheral groove in the spring holding member.
An original cover is provided with a projection to be fitted.
Closing device. 2. One or both of said pair of bearing pins are both
The small diameter part is provided at the end, and this small diameter part is
A member or a supporting member is pivotally supported.
2. The document pressing plate opening and closing device according to 1.