JPH0230876B2 - - Google Patents

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 printing roller that has a repeated printing surface all around its outer periphery, and prints by passing a printing material between the printing roller and a feed roller.

(Problems 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 the two rollers, there is a drawback that ink gets on the feed roller side and stains the back side of the printing material. 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 leading edge of the sticker mount to which many separate payment stickers are attached.

SUMMARY OF THE INVENTION 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 the printing device does not have an adverse effect on the feeding roller or the printing material.

(Means for Solving the Problems) The structure of the present invention for achieving the above objects will be explained with reference to FIGS. 1 to 3 corresponding to embodiments. A printing material support plate 2 is provided to be supported inside the plate 2, and a feed roller 4 forcibly rotated by a motor is provided under the back side of the plate 2 with the outer peripheral surface facing the front side of the plate 2. First and second sensors 11 and 12 are provided between the front and rear positions in the feeding direction of the printing material to control the rotation of the feed roller 4 only when the printing material is being detected, and the plate 2 A swing frame 14 supported by the body frame 1 and swingable in a direction facing the feed roller 4 is provided on the front side of the swing frame 14, and the swing frame 14 has a position where printing can be performed on the printing material on the feed roller 4. A biasing means 24 is provided between the body frame 1 and the swing frame 14 for biasing the printing roller 16 in a direction away from the feed roller 4 during non-printing. is provided between the body frame 1 and the swing frame 14, and the first and second sensors 11 and 12 detect the object to be stamped and when the feed roller 4 is rotationally driven, the printing is performed. A pulling down means 29 is provided for pulling down the roller 16 toward the feed roller 4 side against the force of the urging means 24, and this pulling down means 29 is connected to a first roller fixed to the rotation shaft 5 of the feed roller 4. A friction plate 30, a second friction plate 31 rotatably fitted to the rotating shaft 5, and a second friction plate 31 supported by the rotating shaft 5 on the side of the first friction plate 30. The pressing force biasing tool 33 and the second friction plate 3
1 and the urging means 24 to connect the second friction plate 31
This is characterized in that it is comprised of a connector 32 that transmits the rotational force of the rotational force to the swinging frame 14 to pull down the swinging frame 14.

(Function) In such a printing device, when the first and second sensors 11 and 12 do not detect the presence of a printing medium, the printing roller 16 is activated by the urging means 24 via the swing frame 14. It is held at a position away from the feed roller 4. When both the first and second sensors 11 and 12 detect the printing material, the feed roller 4 starts rotating and starts feeding the printing material.
Regarding this, the swinging frame 14 is pulled down by the action of the pull-down means 29, the printing roller 16 approaches the feed roller 4, the printing material is held between them, and the printing roller 16 is rotated as the printing material moves. The required printing is performed on the surface.

(Example) Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing a printing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the bent line A-A in FIG. 1, and FIG. B-
It is a sectional view along the B line. 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 under the back side of the plate 2 so that its upper outer peripheral surface faces the opening 3. Both ends of the rotating shaft 5 of the feed roller 4 penetrate the body frame 1 and are rotatably supported. Airframe frame 1
A motor 6 for rotating the feed roller 4 is provided at the lower part of the inside. The rotational force of the motor 6 is transmitted from an output shaft 7 of the motor to a rotation shaft 5 of the feed roller 4 via a pulley 8, a belt 9, and a pulley 10. First and second sensors 11 and 12 are disposed at front and rear positions in the feeding direction of the printing material with the feeding roller 4 in between, which rotate the feeding roller 4 only when both sensors are detecting the printing material. There is. 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 attached, and when applying ink, the printing roller 16 can be manually rotated by turning this knob 18. Further, an ink roller 19 that supplies ink to the printing roller 16 is rotatably supported on the swing frame 14 . 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 the handle frame 22, and when attached, the ink roller 19 can be attached to and detached from the cover 2.
It is multiplied by 3.

A biasing means 24 is provided between the body frame 1 and the swing frame 14 for biasing the printing roller 16 in a direction to separate it from the feed roller 4 during non-printing. The biasing means 24 includes an adjustment screw 26 screwed through 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.

Also, between the machine frame 1 and the swing frame 14, a printing roller 16 is placed between the feeding roller 4 and the swinging frame 14.
A pulling means 29 is provided on the side for pulling down against the force of the biasing means 24. The pulling means 29 is
A first roller fixed to the outer periphery of the rotating shaft 5 of the feed roller 4
a friction plate 30, a second friction plate 31 rotatably fitted to the rotating shaft 5, and this second friction plate 31.
A link-type connector 32 connects the protruding peripheral end 31a protruding from the pivot frame 14 to the connecting shaft 27 of the swing frame 14.
and a pressing biasing device 33 made of a spring that presses and biases the second friction plate 31 toward the first friction plate 30 side, and a pressing biasing device 33 that is supported by the rotating shaft 5 by receiving an end of the pressing biasing device 33. It is made up of a receptor 34 and a receptor 34.

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

In such a printing device, when not printing, the urging means 2
Since the swing frame 14 is lifted up at 4, the printing roller 16 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 transmitted through the first friction plate 30 to the second friction plate 31 which is in frictional contact with the first friction plate 30, and the second friction plate 31 is rotated in the rotation direction of the first friction plate 30. An angular displacement is made in a counterclockwise direction as indicated by an arrow P in FIG. Due to the rotation of this second friction plate 31, the swing frame 14 is
The connecting shaft 27 is pulled down against the force of the urging means 24, and the swing frame 14 is thereby lowered and the printing roller 16 approaches the feed roller 4, sandwiching the printing material between the rollers 4 and 16. Printing begins. 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 roller 4 is stopped, which also stops the rotation of the second friction plate 31, and it is pulled down. Since the force disappears, the force of the biasing 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 lowers to the printing position, it eliminates problems such as staining the printing roll with ink and printing on unnecessary areas such as the leading edge of the printing material, and also swings the printing roller above the feed roller. By supporting the frame and making it swingable, the imprint object support plate can be fixed to the machine frame.
Unlike when the feed roller is swingable, there is no need to adjust the position of the plate to match the position of the feed roller, which simplifies the structure. This has the effect that it can be easily applied to objects to be stamped. Furthermore, in the present invention, the pulling means includes a first friction plate fixed to the rotating shaft of the feed roller, a second friction plate rotatably fitted to the rotating shaft, and a second friction plate supported by the rotating shaft. a pressurizing device that presses and urges the second friction plate toward the first friction plate; and a pressing device that connects the second friction plate and the urging means to and a coupling device that transmits the rotational force of the oscillating frame to the oscillating frame to lower the oscillating frame, thereby requiring less electricity to operate the solenoid than when a solenoid is used as the pulling means. Since no equipment is required, it is possible to provide a printing device at low cost and with fewer electrical failures.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of a printing apparatus according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG.
The figure is a sectional view taken along the line B-B in FIG. 1. 1... Airframe frame, 2... Plate, 3...
Opening, 4...Feed roller, 5...Rotary shaft, 6...
... Motor, 11, 12 ... First and second sensors, 14 ... Swing frame, 15 ... Pivotal part, 1
6... Printing roller, 17... Rotating shaft, 19... Ink roller, 24... Urging 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, 31a...
Projecting peripheral end, 32...link type connector, 33...pressing biasing tool.

Claims (1)

[Claims] 1. An imprint object support plate that is directed by the machine frame, a feed roller whose outer circumferential surface faces the front side of the plate and which is forcibly rotated by a motor on the back side of the plate, and an object that is imprinted with the feed roller in between. first and second sensors located at front and rear positions in the feeding direction of the stamped object and for controlling the rotation of the feed roller only while the stamped object is passing, and which detect the stamped object; a swinging frame that is supported by the body frame on the front side and is swingable in a direction facing the feed roller; and a swinging frame that is rotatable at a position where printing can be performed on the imprint object with the outer peripheral surface of the feed roller. a printing roller supported by a printing roller; and urging means provided between the body frame and the swinging frame and urging the printing roller in a direction away from the feed roller during non-printing;
The first and second sensors located between the body frame and the swinging frame detect an object to be imprinted, and when the feed roller is rotationally driven, move the printing roller toward the feed roller side. a pulling-down means for pulling down against the urging force of the urging means, the pulling-down means being rotatably fitted to the first friction plate fixed to the rotating shaft of the feed roller; a second friction plate that is fitted together; a pressing force that is supported by the rotating shaft and presses and urges the second friction plate toward the first friction plate;
The second friction plate and the urging means are connected to each other, and the rotational force of the second friction plate is transmitted to the swinging frame to lower the swinging frame. Printing device.