JPH0470221B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a transmitting unit in a facsimile machine, and particularly to a paper jam release mechanism for a document to be transmitted.

[Background of the invention]

In the transmitting section of the facsimile machine,
When a paper jam occurs in a document to be transmitted, it is necessary to widen the gap between the feed roller that inserts the document and the pressure roller. Therefore, it is necessary to lightly move the feed roller or the pressure roller. On the other hand, in order to reliably feed the document, it is necessary to increase the contact pressure between the feed roller and the pressure roller. In this way, two contradictory functions are required between the feed roller and the pressure roller. On the other hand, in the transmitting section of a conventional facsimile device, a door 2 is provided which is rotatably supported via a guide pin 1 (not shown), as shown in FIGS. 4a and 4b, and a pin 3 is attached to the door 2. a hook 6 which is rotatably supported through the hook 6 and has a groove 5 on the lower surface of the tip into which the pin 4 fixedly supported by the guide is inserted; and two pressing rollers 7a whose both ends are rotatably supported by the door. , 7b, both ends of which are supported between the door 2 and the guide, and the door 2 is always kept at the solid line position shown in FIG. A spring 8 is provided to maintain a predetermined contact pressure between the drive rollers 9a and 9b. The two feed (drive) rollers 9a and 9b are each rotatably supported by the guide and connected to a drive mechanism (not shown). Note that the reference numeral 10 in the drawing is a guide plate for transmitting the original 11. As shown in FIG.

In the above configuration, a predetermined contact pressure is normally maintained between the two pressing rollers 7a, 7b and the two feed rollers 9a, 9b by the pressing force of the spring 8, and one pressing force The document 11 is fed in the direction of the arrow by the rotation of the rollers 7a and 7b. Further, when removing or inserting the document 11 inserted between the two pressure rollers 7a, 7b and the two feed rollers 9a, 9b, the rear end of the hook 6 is After the pin 4 is inserted from the groove 5, the upper part of the door 2 is hit by the pressing force of the spring 8, and a fourth
When it is rotated to the solid line position shown in FIG. and two feed rollers 9
Since the gap between the originals 11 and 9b increases, the original 11
can be removed or inserted. However, in the above configuration, when the document 11 is removed or inserted, the process shown in FIG.
Two pressing rollers 7a, 7b are shown by solid lines in
There is no problem when the document 11 is moved by a small amount, but when a paper jam occurs in the document 11, the two pressure rollers 7a, 7b and the two feed rollers are moved as shown by broken lines in FIG. 4b. 9a, 9b
However, since the spring 8 is generally formed to have a large pressing force, the two pressing rollers 7a, 7
b cannot be moved, and the above door 2
Due to its structure, it cannot be rotated to the position shown by the broken line in FIG. 4b.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a transmitting unit in a facsimile machine in which a pressing roller can be moved when taking out or inserting a document and when paper jams occur easily.

[Summary of the invention]

In order to achieve the above object, the present invention provides a fixed member that rotatably supports the feed roller with a support pin supported at both ends, and inserts this support pin into the lower surface of the tip (on the side of the feed roller). and a swinging member having an opening groove formed to be supported by the swinging member, and an elongated hole formed obliquely upward from the center portion toward the rear end portion (the side opposite to the feed roller). and is slidably supported in the elongated hole of the swinging member via a guide pin, a lower portion of which is rotatably supported by the fixed member, and rotatably supports a pressure roller that is in contact with the feed roller. A locking member is provided, which is inserted into the lower part of the door so as to be slidable in the vertical direction, and whose lower protrusion is in contact with the lower end surface of the door to prevent upward movement. A spring is provided, the ends of which are connected to the upper part of the stop member and the rear end of the swinging member, and which always presses the rear end of the swinging member downward around the support pin, and The present invention is characterized in that a spring is provided, the ends of which are connected to the central part of the member and the door, and which constantly presses the rear part of the swinging member downward about the support pin.

[Embodiments of the invention]

1 and 3 showing embodiments of the present invention will be described below. In the same figure, reference numeral 12 denotes a guide plate for an original 15 which is fixed to the main body of the facsimile machine (not shown) as a chassis, rotatably supports both ends of three feed rollers 13a, 13b, and 13c, and has a curved surface. Both ends of 14 are fixed.
The guide plate 14 has a document reading hole 14a penetrating through its lower portion. Reference numeral 16 designates a door, which is made up of a cover 16a and a guide 16b that are integrally formed with each other using a set screw (not shown). The guide 16b is rotatably supported by the chassis 12 via a shaft 16c fixed to the lower part of both sides so as to protrude outward, and has an upper end surface with a non-slip surface when gripping the upper part of the cover 16a. It forms an uneven surface 16h. Above guide 16
b is the front end of the surface 16 facing the guide plate 14;
d is formed into a curved surface parallel to the guide plate 14 and connected to a drive source (not shown), and three pressing rollers 17a, 17b, 17c are provided so as to be in contact with the three feed rollers 13a, 13b, 13c. The lower pressing roller 17 rotatably supports both ends of the
The document 15 is placed on the lower part of the pressing roller 1
A plurality of projections 16e are fixed in a direction perpendicular to the feeding direction of the document 15 to prevent the document 15 from sticking to the lower part of the guide 16b when inserted from between the document 7c and the lower feed roller 13c. ing. Although not shown, the central driving roller 17b is provided with a sliding clutch mechanism to prevent double feeding of the document 15. Reference numeral 18 is a hook, and a groove 18a is formed on the lower surface of the distal end thereof, and the groove 18a is opened at the bottom for inserting and supporting the support pins 19 fixedly supported at both ends of the shaft 12, In order to slidably support the guide pin 20 whose both ends are supported by the guide 16b, a long hole 18b is formed which is elongated obliquely upward toward the rear.
A protrusion 18c is formed at its lower part. The elongated hole 18b supports the upper part of the door 16 via the guide pin 20, and its length is the same as that of the upper feed rollers 13a, 13b, the pressure roller 17a,
In order to insert the document 15 from between the feed rollers 13a and 17b, the amount of movement of the upper portion of the door 16 in the opposite direction to the feed rollers 13a and 13b is controlled. 21 is a locking piece, and the cover 16a is
The cover 16a is slidably inserted into a hole 16f formed in the vertical direction, and an engaging part 21a is formed in the lower part to engage with the lower end surface of the cover 16a, thereby stopping the cover 16a from moving upward. and the hook 18 is attached to the upper part.
The lower end of the spring 22 is connected to the rear end. Therefore, due to the counter-pressure of the spring 22, the locking piece 21 always has its engaging portion 21 a pressed against the cover 1.
6a, and at the same time the rear end of the hook 18 is pressed downward around the support pin 19. 23 is a tension spring, and its upper end is connected to the protrusion 18c of the hook 18, and its lower end is connected to the spring seat 16g formed on the guide 16b, so that the rear part of the hook 18 is always connected to the support pin 19. It is centered and pulled downwards. 24a,
24b is a sensor, and the upper sensor 24a
is fixed to the upper part of the guide 16b, that is, to the feeding side of the uppermost pressure roller 17a, and the guide plate 1
When it is detected that the document 15 is inserted as shown in step 4, the drive source is driven to feed (drive) the above three pieces.
By rotating the rollers 13a, 13b, and 13c, the lower sensor 24b is fixed at a position below the guide 16b, that is, at a position slightly above the portion of the guide plate 14 opposite to the original reading hole 14a.
When this is detected, the drive source is stopped and the above 3.
feed (drive) rollers 13a, 13b, 13c
The rotation is stopped.

With the above configuration, the original 15 is placed on the guide plate 1.
4 and insert it into the upper sensor 24a.
When detected, the three feed drive rollers 13a, 1
3b and 13c rotate to guide the original 15 to the guide plate 14.
and the guide surface 16b, and when detected by the lower sensor 24b, the three drive rollers 13
The rotation of a, 13b, and 13c is stopped. Therefore, if a document is inserted diagonally between the upper pressure rollers 17a, 17b and the upper feed rollers 13a, 13b, the shaft 16c can be moved by grasping the uneven surface 16h of the upper part of the guide 16b. When the feed rollers 13a, 13b, 13c rotate in the opposite direction of arrow B, the guide pin 20
slides into the elongated hole 18b, and the three pressing rollers 17a, 17b, 1 supported by the guide 16b
Since the rollers 7c are spaced apart from the feed rollers 13a, 13b, 13c, the original 15 can be inserted between the upper pressure rollers 17a, 17b and the uppermost feed rollers 13a, 13b. When the insertion of the original 15 is completed and you release your hand from the upper part of the guide 16b, the tension force of the tension spring 23 causes the guide pin 20 to
slides into the elongated hole 18b in the opposite direction to the above and returns to its original position, and at the same time the door 16 returns to its original position. Three pressing rollers 17a, 17b, 17c
and the three feed rollers 13a, 13b, 13c.
3b, 13c, when the locking piece 21 is pulled downward, the rear end of the hook 18 is rotated downward around the guide pin 20 via the spring 22, and the opening groove 18a is supported. Insert from pin 19. Therefore, the door 16 and the hook 18 are in a free state with respect to the chassis 12, so the door 16 can rotate about the shaft 16c by a larger amount of rotation than in the above case. Therefore, the document 15 in which a paper jam has occurred between the pressure rollers 17a, 17b, 17c and the feed rollers 13a, 13b, 13c can be easily taken out.
After that, when the removal of the original 15 is completed and the door 16 is rotated about the shaft 16c in the direction opposite to the direction of the arrow B, and the downward pulling of the locking piece 21 is stopped, the spring 22 Due to the counter pressure of
The opening groove 18a of the door 1 is inserted into the support pin 19.
6 and hook 18 can be returned to their original positions.

〔Effect of the invention〕

As described above, the present invention has a simple structure and can easily connect the drive roller and the feed roller when a document is inserted diagonally or a paper jam occurs between the drive roller and the feed roller. This has the effect of making it possible to take out the original more easily and to easily change the amount of rotation of the door.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a paper jam release mechanism in a transmitting section of a facsimile machine according to an embodiment of the present invention, Fig. 2 is a plan view taken in the direction of arrow A, Fig. 3 is a sectional front view taken in the direction of arrow A, and Fig. 4. 1 is a side view showing a paper jam release mechanism in a transmitting section of a conventional facsimile machine, and FIG. 1A shows a state in which the door is closed, and FIG. 1B shows a state in which the door is opened. 1...Pin, 2, 16...Door, 15...Document, 17a, 17b, 17c...Press roller, 1
8... Hook, 19... Support pin, 20... Guide pin, 21... Engaging piece, 22... Spring, 23...
...Tension spring, 24a, 24b...Sensor, 25...
...presser spring.

Claims (1)

[Scope of Claims] 1. A support pin supported at both ends is provided on a fixed member that rotatably supports the feed roller, and the support pin is inserted into the lower surface of the tip (on the side of the feed roller). A swinging member is provided, which has an opening groove formed to be supported, and a long hole formed obliquely upward from the center toward the rear end (the side opposite to the feed roller). is slidably supported in the elongated hole of the moving member via a guide pin,
A door is provided whose lower part is rotatably supported by the fixed member and which rotatably supports the pressure roller that is in contact with the feed roller. A locking member is provided which is stopped from moving upward by facing the lower end of the door, and both ends of the locking member are connected to the upper portion of the locking member and the rear end of the swinging member, so that the swinging member is always A spring is provided that presses the rear end of the swinging member downward around the support pin, and both ends are connected to the center of the swinging member and the door, so that the rear end of the swinging member is always kept in the same position as above. A paper jam release mechanism characterized by having a spring that pulls downward around a support pin.