JP2562390Y2 - Rotary die plate positioning device for stamp type printing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rotary (rotary) die plate (hereinafter simply referred to as a rotary die plate) having a cylindrical shape as a whole in addition to general printing such as date and time by a dot printer. More particularly, the present invention relates to a rotary die plate positioning apparatus suitable for use in a stamp type printing machine.

[0002]

2. Description of the Related Art A die plate is arranged before and after a type wheel such as a date and a time. A printing card (printing paper) is inserted between the type wheel and the type surface of the die plate, and then the solenoid is excited. The conventional stamp-type printing device, which is configured to perform engraving printing by beating with a printing hammer, is very loud due to the hitting sound of the printing hammer at the time of printing, the angle adjustment of the printing hammer and the surface of the hammer rubber. There were various problems that maintenance such as adjustment was very troublesome. In view of the above, the present applicant has filed a Japanese Patent Application No. 2-114515, and has proposed a silencing type time printing device in which general printing such as date and time is performed by a dot printer, and printing of die plate characters is performed by a rotary die plate. We proposed a stamp and succeeded in solving the above problems.

[0003]

However, in the above-described muffled time stamp, the rotary die plate is rotated by a DC motor, and the rotary die plate is rotated.
Since the rotation is detected by the home position sensor and stopped at a predetermined position (home position), there is no accumulated error in the stop position of the rotary die plate, but each stop position is an overrun after the DC motor is turned off. The run is not constant due to the variation, and as a result, there is a problem that the position of the die plate printing on the print card varies.

If a stepping motor is used in place of the DC motor, the above-mentioned problem can be solved and the die plate can always be printed accurately at a predetermined position on the print card by numerical control. However, a stepping motor is very expensive and requires a complicated control program (software), so that there is an economic problem that raises the price of the entire printing machine and cannot be easily used. was there.

Accordingly, the technical problem of the present invention is that even if a DC motor having a variation in overrun is used, the rotary die plate is accurately stopped at a predetermined stop position every time, and the die plate printing on the print card is performed. This is to always print at a fixed position.

[0006]

Means taken by the present invention to solve the above technical problems are as follows. Card transport means for drawing and ejecting the inserted print card, dot printer for performing general printing such as date and time on the inserted print card, and die plate printing for the print card as well In a platen type printing machine equipped with a rotary die plate,

(1) A worm gear is mounted on the output shaft of the drive motor for the rotary die plate so as to be movable in the axial direction, and the worm gear meshes with a helical gear mounted on the rotary shaft of the rotary die plate to drive the motor. When rotating, the worm gear is configured to move in the axial direction along the teeth of the helical gear while rotating the helical gear in conjunction therewith. (2) A sliding wheel provided with a positioning V-groove is attached to the rotary shaft of the rotary die plate, and the positioning locking claw which engages with the V-groove by receiving the elastic force of the spring is provided with the shaft. A projection for disengaging is provided to face the moving path of the worm gear moving in the direction. (3) The rotation shaft is provided with a stop means for turning off the rotation of the drive motor at a position slightly before the rotary die plate makes one rotation. (4) A detection piece is attached to the rotary shaft of the rotary die plate, and when the detection piece is detected by the home position detection sensor provided on the machine body side, the drive motor of the rotary die plate is rotated slightly before the rotary die plate makes one rotation. Configure to turn off in position.

[0008]

The above means operates as follows. In the element (1), when the transport of the print card by the card transport means reaches a set position, the die plate drive motor rotates the rotary die plate to perform die plate printing on the print card. At the time when the drive motor starts rotating, the worm gear attached to the output shaft of the motor receives the rotational resistance due to meshing with the helical gear and moves in the longitudinal direction of the output shaft, and rotates the rotary die plate in conjunction with the helical gear. To print the die plate type.

In the element (2), when the worm gear moves in the axial direction in accordance with the rotation of the die plate drive motor, the engagement disengagement protruding from the passage is pushed up to engage the worm gear. Since the pawl is rotated against the elastic force of the spring, the pawl is removed from the V-groove provided on the sliding wheel so that the rotary die plate can be rotated for printing.

The element (3) turns off the drive motor shortly before the rotary die plate makes one rotation. However, even if the drive motor stops, the rotary die plate does not stop immediately but overruns. When the locking claw is applied to the V groove, the elastic force (traction force) of the spring pushes the worm gear down to the starting position and rotates to engage the V groove, thereby stopping the rotation of the rotary die plate. The engagement between the locking claw and the V-groove allows the rotary die plate to be stopped at the same home position each time, thereby enabling the die plate printing on the print card to be accurately performed at the same position each time.

In the element (4), when the home position detection sensor detects the detecting piece attached to the rotary shaft of the rotary die plate, the drive motor is turned off slightly before the rotary die plate makes one rotation. The overrun of the rotary die plate after the motor is stopped is stopped at a fixed position by engaging the above-mentioned locking claw with the V groove. It enables to stop exactly at the same position. As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the rotary die plate positioning apparatus in the stamp type printing machine according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing an example of a stamp-type printing machine that implements the rotary die plate positioning device according to the present invention. The entire printing machine 1 is an upper base 1A incorporating a dot printer or a transport device, which will be described later. And a lower base 1B in which a platen, a pressing roller shaft and the like, which will be described later, are incorporated. A space between the upper base 1A and the lower base 1B is a print card (print paper) PC (see FIGS. 3 and 4). The print card PC is inserted into the transport path as shown by an arrow from a guide table 2 continuously provided on the front surface of the lower base 1B, and is sent back to the guide table 2 after printing. I have.

Reference numerals 3 and 4 denote a first sensor and a second sensor provided at a small distance from the entrance of the conveyance path and inside thereof. When the detection is detected, the card feed motor 8M (stepping motor) is turned on to start the retraction of the print card PC, and the second sensor 4 detects the conveyed print card P.
When the leading end of C is detected, a counter (not shown) for counting the card feed amount (conveyance distance) is turned on to start counting the feed amount.

Reference numerals 5, 6, and 7 denote card feed roller shafts which are provided on the upper surface side of the transport passage at an interval in the front-rear direction. The drive pulley 8 of the card feed motor 8M,
A transport belt 9 formed endlessly is stretched over these roller shafts 5, 6, and 7.
Driven roller shafts 10, 11, 1 installed opposite to 6, 7
2 and a print card PC inserted between the transfer belts 9 described above, the card is conveyed by sandwiching the print card PC from above and below. When the drive pulley 8 is rotated in the counterclockwise direction in FIG. The card PC is pulled in and conveyed in the direction of arrow F shown in FIG. 3, and when the drive pulley 8 rotates clockwise in FIG.
And is conveyed in the direction of arrow B shown in FIG.

Reference numeral 13 denotes a printer base on which a dot printer 13P is mounted. The printer base is movably mounted on a guide shaft 13G mounted on the upper base 1A so as to be orthogonal to the transport direction of the print card PC in the horizontal direction. Have been
The printer operating belt 15 is a printer moving motor 15.
When the printer card 13 is rotated by the drive of the printer M, the printer base 13 moves and the print card P to which the dot printer 13P has been conveyed.
3 and 4, a general printing TP such as a date and a time as shown in FIGS. 3 and 4 is performed with the platen 14P.
Is a mechanism for returning the dot printer 13P to the home position by reverse rotation of.

Reference numeral 14 denotes a platen table on which the above-described platen 14P is mounted. The front and rear ends of the platen table 14 have a substantially U-shaped cross section for holding the front and rear driven roller shafts 10 and 12 rotatably, respectively. Hanging portions 14a, 1
4b, the platen 14P is provided on the upper surface of the platen table 14 laid between the front and rear driven roller shafts 10 and 12 so as to face the printer head 13F of the dot printer 13P. ing.

Further, 14c and 14d are provided within the respective intervals of the above-mentioned three driven roller shafts 10, 11, and 12 which are erected vertically between frames (not shown) of the lower base 1B, respectively. Fixed pins 14c, 1 that are located slightly above the line connecting the bottom surfaces of the roller shafts 10, 11, 12 and protrude from the frame of the lower base 1B.
One spring 14 formed in a linear shape is provided on the upper surface side of 4d.
S, and the left and right sides thereof are bent downward against elasticity, respectively, and the upper surface of the downwardly bent spring 14S is elastically contacted with the bottom surface of each of the driven roller shafts 10, 11, 12. , Each driven roller shaft 10, 11,
12 is pushed up in the direction of the opposing card feed roller shafts 5, 6, 7 so that the respective roller shafts 10 and 5, 11 and 6, 12 and 7
Is maintained at, for example, about 0.4 to 0.5 mm, which is slightly smaller than the thickness of the print card PC, and the distance between the platen 14P and the printer head 13F is also, for example, about 0.4 to 0.5 mm. It is a mechanism to keep it.

Reference numeral 16 denotes a rotary die plate having a die plate type (not shown) formed on a peripheral surface thereof. The rotary die plate 16 erected on the upper base 1A side so as to cross the card conveying path is provided with a driving motor 16M. While being rotated by the (DC motor), the die plate characters formed on the peripheral surface are pressed against the upper surface of the printing card PC being conveyed, and are rotatably supported on the support base 17 while being supported by the spring plate 17S. Between the platen roller 17
Die plate print D as shown in FIG. 4 on print card PC
P is always stopped at a position where a flank (not shown) cut out on the peripheral surface faces the conveyance path, and the print card PC being conveyed has a die plate type. It is configured not to touch.

FIG. 2 is a block diagram showing the electrical configuration of the stamp-type printing machine described above. In FIG. 2, reference numeral 30 denotes a control unit mainly composed of a CPU, and 31 denotes a position of a general print TP with respect to a print card PC. A storage unit (ROM) storing various system programs such as the contents or the number of times of printing and the position of the die plate printing DP is shown in the control unit 30 described above. First and second sensors 3 and 4, a card feed motor 8M,
Die plate driving motor 16M, printer 13P and printer moving motor 15M, rotary die plate 1
6, a sensor circuit 25 for detecting the home position, a clock circuit 22 for transmitting a reference clock signal, a printing position of the general printing TP by the dot printer 13P, and printing of a die plate printing DP by the rotary die plate 16. A means 32 for setting the position is connected.

The stamp-type printing machine used in the present invention has the configuration as described above.
The number, position, contents, etc. of the general printing TP for C are programmed in advance, and the position of the die plate printing is also programmed, so that general printing such as date and time can be performed at an arbitrary position on the inserted printing card PC. The TP and the die plate printing DP can be printed. Next, the configuration of the rotary die plate positioning device according to the present invention implemented in the stamp type printing machine will be described with reference to FIGS. This will be described in detail.

In FIGS. 5 and 6, reference numeral 16F denotes a fixed base for the rotary die plate 16 mounted in the above-described upper base 1A, and bearing plates 18a and 18b of a support frame 18 mounted on the bottom surface thereof. Bearings 16Na and 16Nb are mounted, and left and right shaft ends 16Ta and 16Tb of a rotating shaft 16T on which the rotary die plate 16 is mounted are rotatably supported on these bearings 16Na and 16Nb.

Reference numerals 19 and 20 denote a helical gear and a sliding wheel fixed to the one shaft end 16Ta.
A V-groove 20a for stopping the rotary die plate 16 at the home position is formed on the peripheral surface thereof. Further, a worm gear 23 attached to the output shaft 16Ma of the die plate drive motor 16M meshes with the helical gear 19, and the drive motor The rotation of 16M is transmitted to the rotary die plate 16. The above-described V-groove 20a has a groove on the right side in FIG.
The groove is formed gently to make it easier to enter the inside, and the groove surface on the left side is formed vertically so that the locking claw can be securely locked.

The output shaft 16M of the drive motor 16M described above.
a uses a spline shaft, and the worm gear 23 in which the output shaft 16Ma is fitted into the grooved hole 23a is
Although it rotates integrally with the output shaft 16Ma, the mechanism freely moves in the axial direction (vertical direction in FIG. 5).
At the start of rotation of the output shaft 16Ma based on the activation of the drive motor 16M, the entirety is guided by the inclination of the teeth of the meshed helical gear 19, and the entirety is shown in FIG. 7 from the state shown in FIG. To the position, and thereafter, the rotation of the drive motor 16M is transmitted to the rotary die plate 16 via the helical gear 19,
The rotary die plate 16 is configured to rotate once by one activation.

Further, in the figure, reference numeral 21 denotes a locking claw having a root end 21b rotatably mounted on a mounting shaft 21T provided on the bearing plate 18a of the support frame 18, and the locking claw 21 is provided on the bottom surface. Due to the traction effect of the spring 22 stretched between the hook 21d provided and the support plate 18c protruding from the bearing plate 18a, the claw portion 21a on the distal end side is constantly moved by the sliding wheel 20.
When the claw portion 21a engages with the V-groove 20a of the sliding wheel 20 as shown in FIG. 8, the rotary die plate 16 can be stopped at the home position. The support plate 18c also serves as a stopper for receiving the bottom surface of the worm gear 23 that moves up and down along the output shaft 16Ma.

Reference numeral 21c denotes a disengagement projection which protrudes from the side surface of the locking claw 21 so as to face the movement path of the worm gear 23, and extends along the output shaft 16Ma when the drive motor 16M rotates. The worm gear 23 that moves up
As shown in FIG. 7, the upper edge is brought into contact with
1 is lifted up and rotated against the pulling force of the spring 22 to remove the claw 21a from the V-groove 20a of the sliding wheel 20, and then the stopper 16 provided at the base of the output shaft 16Ma.
The upper surface is brought into contact with Mb, the ascent is stopped, and the meshing helical gear 19 is rotated in conjunction therewith to rotate the rotary die plate 16 once.

5 and 6, reference numeral 24 denotes a detecting piece attached to the other shaft end 16Tb of the rotary die plate 16, and a home position detecting means to which the detecting piece 24 is attached to the fixed base 16F. When the sensor 25 detects, the drive motor 16M is turned to the rotary die plate 1
6 is a position slightly before one rotation, specifically, the claw portion 2 of the locking claw 21 that is pushed up and rotated on the outer periphery of the sliding wheel 20.
It is configured to turn off at the position where 1a reaches near the entrance of the V-groove 20a.

Since the positioning device for the rotary die plate in the stamp-type printing machine according to the present invention is configured as described above, by inserting the print card PC, either the pull-in transport or the discharge transport is performed. Then, the dot printer 13P prints the general print TP such as date and time on the print card PC once or plural times at an arbitrary position on the print card PC according to the program. The die plate printing DP is performed once at an arbitrary position of the above. In the present invention, in particular, in performing the die plate printing DP by driving the rotary die plate 16 by the driving motor 16M, the driving motor 16M When the output shaft 16Ma starts to rotate and starts, the helical gear 19 is stopped by the locking claw 21. Mugiya 23 this helical gear 19
7, the locking pawl 21 is pivoted upward against the traction force of the spring 22 as shown in FIG. 20
a, the helical gear 19 can be unlocked. Therefore, the helical gear 19 is engaged with the worm gear 23 to rotate and rotate the rotary die plate 16, so that the print card PC being conveyed to and from the platen roller 17 can be moved. Die plate printing DP can be performed.

In this manner, the rotary die plate 16 on which the die plate printing DP has been performed is positioned slightly before one rotation, specifically, the claw portion 21a of the locking claw 21 is inserted into the V groove 20a of the sliding wheel 20. When the home position detection sensor 25 detects the detection piece 24 at a position slightly short of the hook and turns off the drive motor 16M, the locking claw 21 is
As the worm gear 23 is pressed down in the axial direction while being pulled down, the claw 21a is pressed against the peripheral surface of the sliding wheel 20 and then the claw 21a is overrun by the rotary die plate 16 as shown in FIG. The rotary die plate 1 can be engaged in the V-groove 20a.
6 can be stopped accurately at the home position every time.

Even if the overrun of the rotary die plate 16 is stopped at a position before the claw portion 21a is not completely engaged with the V-groove 20a, the claw portion 21a is gently positioned before the V-groove 20a. Since the groove surface is pressed downward, the rotary die plate 16 is fed and rotated by this pressing to completely engage the claw portion 21a in the V-groove 20a, thereby eliminating variations in the overrun of the rotary die plate 16. it can.

[0030]

As described above, according to the rotary die plate positioning device in the stamp-type printing machine according to the present invention, the overrun of the rotary die plate is achieved by engaging the locking claw with the V groove. Since the rotary die plate can be stopped at the same home position each time without variation, the die plate printing on the print card can be accurately performed at the same position each time. It is possible to use an inexpensive DC motor as the drive motor of the present invention, thereby exhibiting an economic advantage of reducing the cost of the stamp-type printing machine, and its practical effect is extremely high.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of a stamp-type printing machine in which a rotary die plate positioning device according to the present invention is implemented.

FIG. 2 is a block diagram showing an electrical configuration of the stamp-type printing machine.

FIG. 3 is an explanatory diagram showing a print example of general printing on a print card.

FIG. 4 is an explanatory diagram showing a printing example of general printing and die plate printing on a print card.

FIG. 5 is an exploded perspective view showing a main part of the present invention.

FIG. 6 is a bottom view showing a main part of the present invention.

FIG. 7 is a diagram illustrating a relationship between a locking claw and a V-groove when the rotary die plate starts rotating.

FIG. 8 is a diagram showing an engagement state between a locking claw and a V-groove when the rotary die plate stops rotating.

[Explanation of symbols]

 5, 6, 7 Card feed roller shaft 8M Card feed motor 13P Dot printer 14P Platen 16 Rotary die plate 16M Die plate drive motor 16Ma Output shaft 16T Rotary shaft 17 Platen roller 19 Hasuba gear 20 Sliding wheel 20a V groove 21 Locking claw 21a Claw 21c Protrusion 22 Spring 23 Worm gear 24 Detection piece 25 Home position detection sensor

Claims (2)

(57) [Scope of request for utility model registration] 1. A card conveying means for drawing and ejecting an inserted print card, a dot printer for performing general printing such as date and time on the inserted print card, and a dot printer for In a platen type printing machine having a rotary die plate for performing die plate printing, a worm gear is attached to the output shaft of the drive motor for the rotary die plate so that the worm gear can be moved in the axial direction, and the worm gear is attached to the rotary die plate. The worm gear meshes with the helical gear attached to the rotating shaft, and the worm gear moves in the axial direction along the teeth of the helical gear while the helical gear rotates while driving the motor, and is positioned on the rotary shaft of the rotary die plate. A V-groove provided with a sliding wheel is attached, and the V The positioning locking claw that engages with the worm gear is provided with a disengagement projection that faces the movement path of the worm gear that moves in the axial direction. A rotary die plate positioning apparatus in a stamp-type printing machine, comprising a stopping means for turning off the rotation of the motor at a position slightly before the rotary die plate makes one rotation. 2. A detection piece is attached to a rotary shaft of a rotary die plate, and when the detection piece is detected by a home position detection sensor provided on the machine body side, a drive motor of the rotary die plate is slightly rotated by one rotation of the rotary die plate. 2. The rotary die plate positioning apparatus according to claim 1, wherein the rotary die plate is turned off at a front position.