JPS61144381A - Printer - Google Patents

Abstract

PURPOSE:To assure both a printing roller and printing paper freedom from respective troubles specified below by pulling down the feed roller in resistance against the force of energization while the feed roller is running. CONSTITUTION:When printing paper which has been fed inward along a plate 2, touches each of sensors 11 and 12, a motor 6 starts running, and the rotations thereof are then transmitted to a feed roller 4, which is turn starts feedingthe printing paper. Further, the rotations of the feed roller 4 are subsequently trans mitted to a friction plate 31 via a friction plate 30, thereby the former friction plate turns in the direction of the latter, and a link shaft 27 of a rocking frame 14 is withdrawn downward in resistance against the force of an energization means 24 by means of a coupling 32, thereby the rocking frame 14 goes down, bringing a printing roller 16 and the feed roller into engagement with printing paper getting caught therebetween for the start of printing, whereby the printing roll is ensured free from staining with ink, and such a portion of printing paper wherein no film printing cannot be expected, is likewise assured free from undergoing irregular printing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a printing device suitable for postmarking postage stickers, etc.

(Prior Art) This type of printing device has a repeating printing surface all around the outer periphery of the printing roller, and printing is performed by passing the printing material between the printing roller and the feed roller. .

(Problem to be Solved by the Invention) However, in the case of such a printing device, if the rollers start rotating before the printing material is inserted between both rollers, ink gets on the feed roller side and the printing material There was a drawback that the back side of the paper was stained.

Furthermore, since the printer has a printing surface all around the circumference, it has the disadvantage that it prints even on the leading edge of the printing material, that is, the green part at the leading edge of the sticker mount to which many separate payment stickers are attached.

An object of the present invention is to provide a printing device in which the printing roller does not approach the feed roller until the printing material is inserted to a predetermined printing position, and does not adversely affect the feeding roller or the printing material.

(Means for Solving the Problems) The configuration of the present invention for achieving the above objects will be explained with reference to FIGS. 1 to 3 corresponding to the embodiments.
In the present invention, a printing material support plate 2 is supported within a machine frame 1, and a feed roller 4, which is forcibly rotated by a motor, is provided below the surface side of the plate 2 with its outer peripheral surface facing the surface side of the plate 2. The first control unit controls the rotation of the feed roller 4 only when the printing medium is detected at both front and rear positions in the feeding direction of the printing medium with the feeding roller 4 in between. A second sensor 11, 12 is provided, and a swing frame 14 is provided on the front side of the plate 2 and is supported by the body frame 1 and is swingable in a direction facing the feed roller 4. The printing roller 16 is rotatably supported on the feed roller 4 at a position where printing can be performed on the printing material, and the printing roller 16 is rotatably supported between the body frame 1 and the swing frame 14 when not printing. A biasing means 24 for biasing the rollers 4 away from the rollers 4 is provided, and between the body frame 1 and the swing frame 14, the first. When the second sensor 11.12 detects the object to be stamped and the feed roller 4 is rotationally driven, the printing roller 16 is moved toward the feeding roller 4 side against the force of the biasing means 24. The device is characterized in that it is provided with a pulling means 29 for pulling it down.

(Function) Such a printing device has the following features: 1. Second sensor 11.1
2 do not detect the presence of a printing medium, the printing roller 16 is moved through the swinging frame 14 by the urging means 24.
is held at a position away from the feed roller 4. 1st. When the second sensors 11 and 12 both detect the printing material, the feed row 54 starts rotating and starts feeding the printing material, and the swinging frame 14 is pulled down by the action of the lowering means 29 and the printing roller 16 is moved down. The printing roller 16 approaches the feed roller 4 and sandwiches the printing material between them, and as the printing material moves, the printing roller 16 is rotated, and the desired printing is performed on the surface of the printing material.

(Example) Examples of the present invention will be described in detail below with reference to FIGS. 1 to 3. The printing apparatus of this embodiment has a pair of body frames 1 on the outside, and a printing material support plate 2 is provided horizontally inside the body frame 1. An opening 3 is provided at a position near the end of the plate 2. A feed roller 4 is rotatably provided below the front surface of the plate 2 so that its upper outer peripheral surface faces the opening 3. feed roller 4
Both ends of the rotating shaft 5 pass through the fuselage frame 1 and are freely rotatable (supported).A motor 6 for rotating the feed roller 4 is provided at the lower part of the fuselage frame 1.Motor 6
The rotational force is transmitted from the output shaft 7 of the motor to the pulley 8 and belt 9.
, the rotational force is transmitted to the rotating shaft 5 of the feed roller 4 via the pulley 10. At the front and rear positions in the feeding direction of the printing material with the feeding roller 4 in between, there are first rollers that rotate the feeding roller 4 only when the printing material is being detected.
A second sensor 11.12 is arranged.

These sensors 11 and 12 each consist of a switch and are connected in series so that the power supply to the motor 6 is controlled by a switch box 13.

Above the surface side of the plate 2, a swing frame 14 is supported by the body frame 1 with a pivot 15 so as to be swingable in the vertical direction. A printing roller 16 is rotatably supported on the swing frame 14 at a position on the feed roller 4 where printing can be performed on the printing material. Rotating shafts 17 at both ends of the printing roller 16 pass through the swing frame 14 and are rotatably supported by the swing frame 14. There is a knob 1 on the tip of the rotating shaft 17.
8 is installed, and when applying ink, use this knob 1.
By turning 8, the printing roller 16 can be manually rotated. In addition, the swing frame 1
An ink roller 19 for supplying ink to the printing roller 16 is rotatably supported at 4 . Both ends of the rotating shaft 20 of the ink roller 19 are fitted into recesses 21 of the swing frame 14 and are rotatably supported by the swing frame 14.

The ink roller 19 can be attached and detached by holding a handle frame 22, and is covered with a cover 23 in the attached state.

A biasing means 24 is provided between the body frame 1 and the swing frame 14 for biasing the printing row 516 in a direction to separate it from the feed roller 4 during non-printing. The biasing means 24 includes an adjustment screw 26 screwed back into the connection shaft 25 of the body frame 1, and a tension spring 28 installed between the tip of the adjustment screw 26 and the connection shaft 27 of the swing frame 14.
It consists of.

Moreover, between the fuselage frame 1 and the swing frame 14,
A means 2 for urging the printing roller 16 toward the feed roller 4 side during printing.
Pulling down means 29 are provided for pulling down against the force of 4. The pulling down means 29 includes a first friction plate 30 fixed to the outer periphery of the rotating shaft 5 of the feed roller 4, a second friction plate 31 rotatably fitted to the rotating shaft 5, and a second friction plate 31 that is rotatably fitted to the rotating shaft 5. A link-type connector 32 that connects the peripheral end of the friction plate 31 and the connecting shaft 27 of the swing frame 14, and a spring that presses the second friction plate 31 toward the first friction plate 30 side. It is composed of a pressing force 33 and a receiver 34 which receives an end of the pressing force 33 and is supported by the rotating shaft 5.

A U-shaped printing material insertion guide 37 is supported in the middle of the other connecting shaft 35 of the body frame 1 via a piece 36 . Note that 38 is a power switch.

In such a printing device, the swinging frame 14 is lifted by the urging means 24 when not printing, so the printing roller 1
6 is spaced apart from the feed roller 4. In this state, when a material to be printed, such as a mount with a separate payment sticker attached, is inserted along the plate 2 and comes into contact with the first and second sensors 11 and 12, the motor 6 is driven and its rotational force is transferred to the belt 9. The signal is transmitted to the feed roller 4, and the feed roller 4 starts rotating to start feeding the printing material. Also, when the rotation shaft 5 of the feed roller 4 starts rotating, the rotational force is the first.
I11 to this through the friction plate 30! [Transmitted to the second friction plate 31 that is in contact, and the second friction plate 31
The friction plate 30 is rotated in the 8-turn direction. Due to the rotation of this second friction plate 31, the swing frame 1 is
The connecting shaft 27 of No. 4 is pulled down against the force of the urging means 24, thereby lowering the swinging frame 14, and the printing roller 16 approaches the feed roller 4, and the printing material is sandwiched between both rollers 4 and 16. Then printing will start. The printing roller 16 is rotated as the substrate moves. When the printing material is moved to the left in FIG. 1 and its end passes past the first sensor 11, the rotation of the feed row 54 is stopped, and thereby the rotation of the second friction plate 31 is also stopped, and it is pulled down. Since the force disappears, the force of the urging means 24 prevails and the swing frame 14 is raised and returned to its original position.

(Effects of the Invention) As explained above, in the printing apparatus according to the present invention, the printing roller together with the swing frame is separated from the feed roller by the urging means before printing starts, and is pulled down by the pulling means during printing. Since it is lowered to the printing position, it is possible to eliminate drawbacks such as staining the printing roll with ink or printing in an unstable area such as the leading edge of the printing material.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of a printing device according to the present invention;
Figure 2 is a cross-sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 1.
-B sectional view. 1... Body frame, 2... Plate, 3... Opening, 4... Feed roller,
5...Rotating shaft, 6...Motor, 11.
12- 1st. Second sensor, 14...
... Swinging frame, 15... Pivotal part, 16...
...Print roller, 17... Rotation shaft, 19.
...Ink roller, 24...Biasing means,
25...Connection shaft, 26...Adjustment screw,
27... Connection shaft, 28... Tension spring, 29... Pulling down means, 30... First
Friction plate, 31...Second friction plate, 32...
...Link type connector, 33...Press biasing tool.

Claims (2)

[Claims] (1) A printing material support plate is provided supported by the machine frame, and a feed roller that is forcibly rotated by a motor is provided on the front side of the plate so that the outer peripheral surface faces the front side of the plate, and the feed roller is placed in between. First and second sensors are provided at the front and rear positions in the feeding direction of the printing material to control the rotation of the feed roller only when the printing material is being detected, and on the surface side of the plate, the A swinging frame supported by the frame and swingable in a direction facing the feed roller is provided, and the swinging frame rotatably supports a printing roller at a position where printing can be applied to the printing material on the outer peripheral surface of the feed roller. , a biasing means is provided between the body frame and the swinging frame for biasing the printing roller in a direction away from the feed roller during non-printing, and a biasing means is provided between the machine body frame and the swinging frame. is a pulling means for pulling down the printing roller toward the feed roller against the force of the biasing means when the first and second sensors detect an object to be imprinted and the feed roller is rotationally driven; A printing device characterized by being provided with. (2) The pulling means includes a first friction plate fixed to the rotation shaft of the feed roller, a second friction plate rotatably fitted to the rotation shaft of the feed roller, and a second friction plate fixed to the rotation shaft of the feed roller, and a second friction plate fixed to the rotation shaft of the feed roller. a pressing force that is supported by a rotational shaft and presses and urges the second friction plate toward the first friction plate; and a pressing force that transmits the rotational force of the second friction plate to the swing frame. 2. The printing apparatus according to claim 1, further comprising a connecting means for pulling down the swinging frame.