JPS6158777A - Paper feed mechanism - Google Patents

Abstract

PURPOSE:To achieve the miniaturization, wt. reduction and simplification of the titled mechanism and to facilitate the reduction in cost and a noise and vibration measure, by performing the rotation of a platen and that of a feed roller by one drive source. CONSTITUTION:The idle gear 18 having the support member 19 rotatable at the shaft center of a motor 6 is engaged with the gear 17 directly connected to the motor 6. The support member 19 is supported by a spring 21 and the solenoid 22 provided in opposed relation to said spring 21. When the solenoid 22 is brought to a non-attracted state, the idle gear 18 is engaged with a platen gear 20 and a platen is rotated to feed a slip 24. When the solenoid 22 is brought to an attracted state, the idle gear 18 is engaged with a gear 23 and a feed roller 3 comes to a rotary state through a pulley 28, a belt 10 and a pulley 9. A pressure roller 4 is contacted with the feed roller 3 under pressure to feed a slip 25 from the nip of both rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pawl feeding mechanism that can be used in printing devices and the like.

[Conventional technology]

Conventionally, when an abrasive feeding mechanism used in a printing device has both a feed roller that sends single sheets and a platen that can feed forms, there is a unique method for driving the feed roller or platen. motor was used. FIG. 1 shows one example. In the figure, 1 is the print head, 2
The platen 2 is connected to a drive motor 6 via a platen pulley 5, a timing belt 8, and a motor pulley 7.
It is connected with. 3 is a feed roller, a feed roller pulley 9, a timing belt 10. Motor pulley 12
It is connected to the drive motor 11 via.

A pressure roller 4 is supported by a support member 25 that is rotatable about a rotating shaft 27, and is installed facing the feed roller 3. The support member 15 is supported by a spring 14 and a lunoid 13 installed opposite to the spring 14, and the pressure roller 4 can be retracted from the feed roller 3 when the solenoid 13 is not in the suction state. Note that 16 is an insertion device and 26 is an insertion port.

However, in such a paper feeding mechanism, there is a limit to how small, lightweight and simple the device can be made due to the size of the motor, weight scale, control, etc. Furthermore, since two motors are required, it is difficult to reduce noise or photographing.

[Problems to be solved]

The present invention is an attempt to solve the conventional problem that there is a limit to the size, weight, and simplification of the motor due to the size, importance, control, etc., and it is difficult to reduce noise and imaging. be.

[Means for solving problems]

The paper feeding mechanism of the present invention has a support member rotatable around the shaft of a drive source, and a deceleration transmission part that transmits the drive of a transmission part directly connected to the drive source to a feed roller IC of a platen or a paper insertion slot; A paper feed drive switching mechanism that transmits the drive of the transmission part to either the platen or the feed roller, and a pressure roller that faces the feed roller and is retractable when not printing on paper inserted into the insertion slot. 2, and a press/yield roller opening/closing mechanism for retracting and pressurizing the pressure roller in conjunction with the paper feed drive switching mechanism, thereby solving the above-mentioned conventional problems.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 shows a case where the platen 2 is driven and the form 24 is sent. A motor gear 17 directly connected to the drive motor 6 meshes with an idle gear 18 having a support member 19 rotatable around the shaft of the drive motor 6 . The support member 19 is supported by a spring 21 and a solenoid 22 installed opposite the spring 21, and when the solenoid 22 is not in the suction state, the idle gear 18 is brought into mesh with the platen gear 20 by the spring 21. Furthermore, platen gear 20
is directly connected to platen 2. Therefore, this state is the case where the rotation of the drive motor 6 is transmitted to the platen 2 and the form 24 is sent. FIG. 3 is a diagram showing the case where the feed roller 3 is driven to feed the cut sheet 25. The pressure roller 4 is installed opposite the feed roller 3 and has a rotating shaft 27.
It has a support member 15 that is rotatable around.

The support member 15 is supported by a spring 14 and a solenoid 13 installed opposite to the spring 14. When the solenoid 13 is not in the suction state, the pressure roller 4 is retracted from the feed roller 3 as shown in FIG. . When the cut sheet 25 is inserted into the insertion slot 26, the gravure roller 4 is retracted, and the cut sheet 25 can be inserted. Therefore, with the ticket 25 inserted through the insertion slot 26, the following operations are performed. When the solenoid 22 is sucked, the idle gear 18 is brought into mesh with the gear 23 as described above, and at the same time, the solenoid 13 is pulled a, and the pressure roller 4 is pressed against the feed roller 31C. A pulley 28 is directly connected to the gear 23.
8 is connected to a feed roller pulley 9 by a timing belt 10. Further, the feed roller pulley 9 is directly connected to the feed roller 3. Therefore, in this state, the rotation of the drive motor 6 is transmitted to the feed roller 3, and the cut sheet 2
This is the case when sending 5. In this way, one drive motor 6 rotates both the feed roller 3 and the platen 2, resulting in a small size.

This makes it possible to make a lightweight 1m tangle.

〔Effect of the invention〕

As explained above, the present invention allows the rotation of the platen and the rotation of the feed row 2 to be performed by one drive source,
As a result, compared to the case where a plurality of drive sources are used, the device can be made smaller, lighter, and simpler, and the cost can be reduced and measures against noise and vibration can be easily taken.

[Brief explanation of the drawing]

W1 diagram shows conventional paper feed! An explanatory diagram showing one example of the 7 mechanisms, Fig. 2 is an explanatory diagram showing a case where a form is sent by the platen 5 movement of the present invention, and Fig. 3 is an explanatory diagram showing a case where a form is sent by the feed roller drive of the present invention. FIG. 2...Platen 3...Feed roller 4...Pressure roller 6...Drive motor 15.
19...Supporting member

Claims (1)

[Claims] A deceleration transmission component that has a rotatable support member centered on the shaft of the drive source and transmits the drive of the transmission component directly connected to the drive source to the platen or the feed roller of the paper insertion slot; a paper feed drive switching mechanism that transmits transmission to one side of the feed roller; a pressure roller that faces the feed roller and is arranged so as to be retractable except when printing on paper inserted into the insertion slot; and the paper feed drive switching mechanism. A paper feeding mechanism that includes a pressure roller opening/closing mechanism that works in conjunction with the mechanism to retract and press the pressure roller.