JPH07123199A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To simplify the structure and to make the size small and the weight light by adopting one feed/platen roller and one motor for the facsimile equipment which conventionally have been provided with a feed roller in an original fed path, a platen roller to a recording paper discharge path respectively and separate motors for the rollers. CONSTITUTION:The facsimile equipment is provided with a paper feed path 10 in which an image scanner 11 is arranged to one side of a feed/platen roller 20 and a recording paper discharge path 21 in which a printer head 22 is pressed into contact/detached from the opposite side and the press contact/detachment of the printer head 22 is conducted by horizontal movement of a connected rack 25 to the head 22. The horizontal movement of the rack 25 is conducted by using a changeover lever 26a. After the end of transmission and copy, a motor 42 is automatically reversed and an intermediate gear 34 meshes with a 1st gear 31 to move the rack 25 to the right and restores the changeover lever 26a in a receptible state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine which can perform transmission, reception and copy operations by driving one roller.

[0002]

2. Description of the Related Art In a conventional facsimile apparatus, a feed roller is provided in a document feed path and a platen roller is provided in a recording sheet discharge path, and the feed roller is rotationally driven at the time of transmission so that a transmission document is fed. On the other hand, when receiving,
The platen roller is rotationally driven to eject the recording paper, and at the time of copying, the document feeding operation by the rotational driving of the feed roller and the recording paper ejection operation by the rotational driving of the platen roller are simultaneously performed. It was

[0003]

However, in the conventional drive mechanism for independently driving the feed roller and the platen roller, it is necessary to mount a dedicated motor for each of the two roller drives, and the number of parts is large. The structure is complicated and the cost is high, which is a factor that hinders reduction in size and weight.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a facsimile apparatus capable of performing all the conventional operations described above by driving one roller.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a platen roller, a motor for driving the platen roller, a print head, a rack for bringing the print head into contact with and away from the platen roller, and a transmission position for the rack. An operating means for moving the rack to a receiving position, a gear meshing with the rack, and a movable gear provided between the gear and the motor for returning the rack to the receiving position when the rack is in the transmitting position. It is characterized by being configured.

[0006]

When the switching lever is set to the receiving position, the moving gear meshes with the second gear and the rack moves to the right in the longitudinal direction, so that the print head comes into contact with the feed / platen roller and printing is performed. Be seen. In this state, the second gear comes to a place where there are no teeth on the rack, so that the second gear is disengaged from the rack and the rack is not pushed further to the right (inward).

When the switching lever is moved to the transmitting position (only at this time), the moving gear and the second gear are separated from each other, and at the same time, the lever pushed by the switching lever moves the rack leftward (outward). The print head is separated from the feed / platen roller and no printing is performed.

After the transmission is completed, when the motor is rotated in the reverse direction, the intermediate gear meshes with the first gear to move the rack to the right (inward), and the print head is fed through the lever pivotally attached thereto. / Contact the platen roller and receive the switching lever to return to the copy position.

A document sensor provided on the entrance side of the paper feed path operates by feeding a document.

[0010]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure, 20 is a feed / platen roller, 11 is an image scanner, and 22 is a print head. In this case, a thermal head is used. The feed / platen roller 20 includes a motor 42 as shown in FIGS.
The rotation in the arrow direction is transmitted through the gear and rotates in the arrow direction. Then, the feed / platen roller 20 comes into contact with the image scanner 11 disposed in the middle of the paper feed path 10 for the document 13, and when the document 13 is inserted, the image information of the document 13 is read.

The document sensor 12a is provided on the entrance side of the paper feed path 10 and is operated by the passage of the document 13. Reference numeral 27 denotes a recording paper roll, and the recording paper 27 a passes through a recording paper discharge path 21 arranged on the side opposite to the paper feed path 10 side of the feed / platen roller 20, and passes through the print head 22.
Is abutted on the feed / platen roller 20, and is discharged in the direction of the arrow by the feed / platen roller 20 in the state shown in FIGS.

When the print head 22 is separated from the feed / platen roller 20 as shown in FIG.
a is not discharged. The means for bringing the print head 22 into contact with and separating from the feed / platen roller 20 is as follows. That is, the press lever 23, to which the print head 22 elastically urged by the spring 22a is attached, is pivotally attached to the rack 25 via the link 24, and the rack 25 is moved to the left or right to thereby move the print head 22. To or from the feed / platen roller 20. The pressing lever 23 has a base end on the main body case 41 and a front end on the link 2
It is pivotally attached to 4.

As shown in the drawing, the rack 25 is provided with a flat portion without teeth in the middle thereof, the outer gear portion 25a has a first gear 31 and the inner gear portion 25b has a second gear. 32 mesh with each other. In order to bring the print head 22 into contact with the feed / platen roller 20, when the position of the switching lever 26a is set to the receiving state and the copying state of FIGS. 1 and 3, the moving gear 33 meshes with the second gear 32 and the motor 32 is moved. The rotation of 42 in the direction of the arrow causes the second gear 32 to rotate in the direction of the arrow (clockwise), so that the rack 25 slides in the direction of the arrow (to the right) and pushes the pressing lever 23 via the link 24, thus The print head 22 contacts the feed / platen roller 20.

In order to separate the print head 22 from the feed / platen roller 20, the position of the switching lever 26a is set to the transmitting state in FIG.
6 is pushed outward (to the left) and the rack 24 pivotally attached to the rod 26 is moved outward (to the left) by a predetermined distance, so that the print head 22 is separated from the feed / platen roller 20 and, at the same time, the moving gear is moved. 33 and the second gear 32 are disengaged from each other.

The switching lever 26a is moved only during the transmission, and after the transmission is completed, when the motor 42 is rotated in the reverse direction as shown in FIG. 4, the intermediate gear 34 swings from the state of the chain line to move the first gear. 31, the rack 25 is moved inward (to the right) by a predetermined distance as indicated by the arrow, and the switching lever 26a returns to the state of receiving and copying.

Next, the operation will be described. FIG. 1 shows the receiving state, and when the switching lever 26a is in the position shown in the drawing, the print head 2 is
2 comes into contact with the feed / platen roller 20 and the recording paper 2
7a is discharged in the direction of the arrow. Figure 3 shows the state when copying
When the document 13 is inserted into the paper feed path 10 in the state shown in FIG. 1, the document sensor 12a is actuated, and the read document 13 is recorded on the recording paper 27a and discharged.

When the switching lever 26a is switched to the position shown in FIG. 2, a transmission state is set, and the rod 26 pushed by the switching lever 26a moves the rack 25 outward (to the left), so that the print head 22 moves to the feed / platen roller. The recording sheet 27a is separated from the recording sheet 20 and is not fed. When the document 13 is inserted into the paper feed path 10 in this state, transmission is performed. When the transmission is completed, the motor 42 automatically reverses as shown in FIG. 4, and the rack 25 is moved inward (rightward) as indicated by the arrow.
The switching lever 26a returns to the state of receiving and copying.

[0018]

According to the present invention described in detail above, the following effects are exhibited. (1) Since the feed roller arranged in the document feeding path and the platen roller arranged in the recording paper discharging path are combined into one feed / platen roller, only a single drive motor is required. The structure is simplified and the cost can be reduced. It is also effective in promoting the reduction in size and weight of the device.

(2) When receiving easily with a manual switching lever,
It is possible to switch between copying and transmitting, and after the transmission is completed, it is automatically in the receiving and copying state, so that it is possible to prevent printing not being performed when receiving due to forgetting to operate the switching lever.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a receiving state according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a transmission state according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a copying state according to an embodiment of the present invention.

FIG. 4 shows an embodiment of the present invention, and is an explanatory diagram in the case where the motor rotates in the reverse direction and the transmission state returns to the reception state.

[Explanation of symbols]

 10 Paper Feeding Path 11 Image Scanner 12a Original Sensor 13 Original 20 Feed / Platen Roller 21 Recording Paper Ejecting Path 22 Printing Head 22a Spring 23 Pressing Lever 24 Link 25 Rack 25a Outer Teeth 25b Inner Teeth 26 Rod 26a Switch Lever 31 First gear 32 Second gear 33 Moving gear 34 Intermediate gear 41 Main body case 42 Motor

Claims (1)

[Claims] 1. A platen roller, a motor for driving the platen roller, a print head, a rack for bringing the print head into contact with and away from the platen roller, and an operation for moving the rack to a transmission position and a reception position. Means and
A facsimile apparatus comprising: a gear that meshes with the rack; and a movable gear that is provided between the gear and the gear that returns the rack to the reception position when the rack is at the transmission position.