JPH02132058A - printer print paper conveyance device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a print paper conveying device for a printer. [Conventional Techniques] Figure 4 shows an example of a conventional print paper transport device. In the figure, code (1) is printing paper, (2m),
(2b》) are the upper and lower paper guides that guide the movement of the print paper (1) between them, (3m>, (3
b) are upper and lower rollers for feeding the print paper (1) guided by the paper guides (2a) and (2b) to the next, and rotate in the direction of the arrow. Since the conventional device is configured as described above, when conveying the print paper (1), the print paper (1) is correctly placed between the upper and lower rollers (3a) and (3b).
), the paper guide (2
The printing paper (1) is fed between the upper and lower rollers (3a) and (3b).
The object is sandwiched between the objects and is fed to the next object by its rotation. [Problems to be Solved by the Invention] During printing, especially during printing using thermal energy, the printing paper is damaged due to the thermal energy given during printing. causes paper warpage. When conveying the warped print paper within the apparatus or ejecting it out of the apparatus, the print paper is placed between the upper and lower paper guides (2a), as described in the prior art section above.
, (2b) are arranged to restrain paper warping, and at least one pair of upper and lower rollers (3 m). It was transported by (3b). As described above, conventional devices have the problem of requiring rollers and paper guides that have high precision and are difficult to process and assemble. I had a problem to solve. This invention was made in order to solve the above-mentioned problems, and aims to provide a print paper conveying device for a printer that does not require high precision, is easy to process and install, and is highly economical. ．． [Means for Solving the Problems] A print paper conveyance device for a printer according to the present invention receives print paper that is printed and sent out, and is formed with a U-shaped paper edge receiving portion at the rear end, and is one-way. A paper push lever is configured to be movable in the transport direction of the print paper by the reverse drive of a drive source connected via a clutch, and a paper edge lever is parallel to the paper edge receiver that is connected to the drive source via a friction clutch. It is equipped with a paper press lever that is attached to a shaft and rotates downward, which enters a notch formed in a part of the paper edge holder and presses down the print paper. [Operation] Since the device of this invention is configured as described above, when the print paper is fed out, the print paper rides on the paper push lever, and then the friction clutch is activated by the forward rotation of the motor. The paper presser lever rotates through the lever, and its tip enters the notch in the paper push lever to press the trailing edge of the print paper. Next, when the motor is driven in reverse, the paper push lever is pushed in the conveying direction of the print paper via the one-way clutch, so that the trailing edge of the print paper engages with the U-shaped paper edge receiver and In this state, it is continuously pushed in the transport direction and transported. At that time, the paper holding lever passes through the notch and separates from the paper pushing lever, and the motor reverses, causing the paper holding lever to rise and prepare for the next step. Note that the paper holding lever descends and hits the paper pushing lever. The transmission of the rotation of the motor after the paper pushing lever moves forward or backward and stops, respectively, is prevented by a friction clutch and a one-way clutch. [Example] This invention will be explained below based on the drawings showing one example. In Figure 1, code (1) is printing paper, (11)
is a base, and (12) is configured to be movable on the base (11) in the conveying direction (13) of the print paper (1), and receives the print paper (1) on its upper surface and has a coat on the rear end. This is a paper pushing lever in which a paper edge receiving part (12a) in the shape of a square is formed.
) is configured to be moved by reversing the driving source, for example, the motor (14) via a one-way clutch (not shown). In addition, the above paper edge holder (
12a) has a notch (12b) formed in a part thereof. Next, reference numeral (15) indicates the paper edge receiving portion (1) at its base end.
2a) is fixed to a shaft (16) provided in parallel to the paper holding lever, which rotates as the shaft (16) rotates, and its tip has a notch (12b).
It is possible to descend so as to enter the body, and the tip part can be moved down through the elastic body (17) attached thereto.
It is constructed so that it can hold the printing paper (1).
Further, the shaft (16) is connected to the motor (14) via a friction clutch (18).
) and the friction clutch (18) are connected by a speed reducer, such as a worm (19) and a worm (20). Since this embodiment is oval shaped as described above, the second
It works as shown in Figures A-D and below. 1) The printed paper (1) is pressed into the paper push lever (12)
It is sent upward (Figure 2 A). 2) When the motor (14) is rotated in the normal direction (X direction in Figure 1) and the shaft (16) is rotated in the normal direction in the The elastic body (17) at its tip presses down the print paper (1) (Fig. 2B).In this case, even if the motor (14) continues to rotate normally, the paper press lever After the tip of (15) contacts the lower part, a slip occurs in the friction clutch (18), and the driving force of the motor (14) is transferred to the shaft (16).
is not transmitted. Also, because of the one-way clutch,
The paper push lever (12) does not operate in this case. 3
) When the motor (14) is reversed, the driving force of the motor (14) operates the paper push lever (12) in the direction of arrow P via a one-way clutch (not shown), and pushes the rear end of the print paper (1). so that it enters the upper part of the paper edge holder (12a). In that case, use the paper press lever (
15) is the notch (12b) of the paper push lever (12)
As a result of this reversal, the paper pressing lever also rotates and begins to rise (Fig. 2c). After that, the paper push lever (12) continues to move in the P direction, and the print paper (1
), the paper holding lever (15) rotates and returns to the initial state (Fig. 2D). In this case, the lower edge of the paper holding lever (15) hits a stopper (not shown), and the paper The presser lever (15) stops rotating, but in that case, even if the motor (14) continues to rotate, the friction clutch (18) prevents the rotation of the motor (14) and the paper presser lever (15). There is no problem in stopping the printing paper (
1) is conveyed, for example, in the opposite direction to the direction in which it was printed and sent out, but the invention is not limited to this. The device (21) of the present invention can also be arranged laterally so as to transport in the direction (T) at right angles to the direction (S), and as shown in FIG. It can also be constructed so that it can be transported in the same direction (T') as the direction (S) from which it came. In either case, the same effect as in the above embodiment is obtained. [Effects of the Invention] As described above, according to the present invention, a U-shaped paper edge receiving portion is formed at the rear end of the paper to receive printing paper that is sent out after printing, and is connected via a one-way clutch. A paper push lever is configured to be movable in the transport direction of the print paper by the reverse drive of the drive source that is attached to the paper push lever, and a paper push lever is attached to a shaft parallel to the paper edge receiver that is connected to the drive source via a friction clutch. Each member requires high precision because it is equipped with a paper holding lever that enters a notch formed in a part of the paper edge holder and holds down the 7-lint paper when it rotates downward. It is not necessary, and it is easy to assemble, and this component can be made into a unit to make it smaller. Therefore, it is economical, does not cause paper jams, and can stably transport print paper. The printer's print paper conveyance device has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the configuration of an embodiment of the present invention, and FIGS. 2A, B, C, and D are explanatory diagrams illustrating the relationship of each part in each process from sending out the printing paper to carrying it out according to the embodiment of FIG. 1. , FIGS. 3A, 3B, and 3C are relationship layout diagrams of three other embodiments of the present invention in the delivery direction, and FIG. 4 is a schematic explanatory diagram of a print paper conveying device of a conventional printer. (1)...Print paper, (12)...Paper push lever, (12a)...Paper edge holder, (12b)-Notch, (14)...Drive source (motor), ( 15)・Paper press lever, (16)...shaft, (18)・
...Friction clutch. In each figure, the same reference numerals indicate the same or equivalent parts. A Boru 3 map B City 2 map

Claims (1)

[Claims] A U-shaped paper edge receiving part is formed at the rear end to receive the print paper that is printed and sent out, and is moved in the transport direction of the print paper by the reverse drive of the drive source connected via a one-way clutch. The paper eject lever is configured to be able to rotate, and is attached to a shaft parallel to the paper edge receiver that is connected to a drive source via a friction clutch and rotates downward. A print paper conveyance device for a printer, comprising a paper press lever that enters a notch formed in a portion and presses the print paper.