JPH0692004A - Electronic numbering device - Google Patents

Abstract

(57) [Abstract] [Purpose] The stepping motor is used as a drive source, and the resetting process in which a large load torque acts in a character selection device having a resetting process is divided into a plurality of times to ensure resetting operation and the like. An electronic numbering device configured to be implemented is provided. [Structure] By providing a first reset protrusion and a second reset protrusion on the character selection cam and operating a latch for a plurality of addresses at each position to perform a reset operation, the load torque applied to the type wheel shaft is halved. By doing so, a reliable reset operation can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic numbering device for electronically selecting arbitrarily set print data.

[0002]

2. Description of the Related Art Conventionally, as an electronic numbering device,
There has been proposed an apparatus that electronically sets and changes an arbitrary value with respect to the numbering for mechanically recording serial numbers.

[0003]

However, in the electronic numbering device using a stepping motor as a drive source, a type wheel shaft for resetting all the digits of the device having a large number of digits at once. There is a problem that the maximum load torque applied to is larger than the driving torque of the stepping motor and the reset operation cannot be executed.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to reliably execute the reset operation by dividing the reset operation into a plurality of times even when the stepping motor is used as a drive source. It is to provide an electronic numbering device that can be used.

[0005]

In order to achieve this object, the electronic numbering device of the present invention has an input means for inputting data to be printed and a display for displaying the data input by the input means. Electronic numbering including an apparatus, a control unit that changes a set value by a predetermined amount based on the input data, and a printing unit that prints the value set by the control unit on an arbitrary object by a plurality of type wheels. In the apparatus, a movable character selection cam having a protrusion for sequentially selecting the plurality of type wheels, and a plurality of character type cams provided separately corresponding to the plurality of type wheels and capable of engaging with and disengaging from the type wheels respectively. The selection cam, which acts on each of the sets of latches addressed to a plurality of sets in sequence during the resetting step of aligning the character wheels by aligning the girders. Electronic numbering device, characterized in that a plurality of reset unit to align the print wheel via the corresponding latch.

[0006]

The electronic numbering device of the present invention having the above-described structure acts on the type wheel shaft by performing the reset operation in a plurality of divided operations during the reset operation for aligning the type wheels of all the digits. The load torque can be reduced, and the reset operation can be surely executed even when the stepping motor is used as the drive source.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an external view of an electronic numbering device according to the present invention. The electronic numbering device is composed of a main body 1 and an opening 2 which is made of a transparent member and shows a printing position for easy confirmation of the printing position. And slide 3 with. The main body 1 is composed of a front body 1a and a rear body 1b. An input means 4 and a display device 5 (display means) composed of an LCD or the like are provided on the center front surface of the front part 1a of the main body, and a battery lid 6 for battery replacement is provided on the upper part.
Is provided.

FIG. 2 is a front sectional view of the present apparatus, and FIG.
FIG. 3 is a side sectional view taken along the line aa of FIG. 2.

Both sides of the type wheel shaft 7 are supported by the chassis 9 via the metal 8. On one side surface of the plurality of type wheels 10, a groove portion 10 for storing a type spring 11 for engaging and positioning the type wheel 10 and the type wheel shaft 7 at a constant pitch.
a and a plurality of engaging claws 10b for engaging and disengaging the engaging portion 15a at one end of the latch 15 are provided. On the opposite side surface, the type spring 11 is fitted with the groove portion 10a. Is integrally provided with a spring retainer 10e for restricting the swinging of the in the thrust direction.

In the character wheel 10, the character springs 11 for the respective digits stored in the groove 10a are divided in the radial direction on the character wheel shaft 7 at the same angular pitch as the marking surface 18 of the character wheel 7a. It is pivotally supported so that each digit can be rotated independently by connecting and disconnecting. Further, one end of the type wheel shaft 7 is connected to the stepping motor 25 by the shaft joint 12 so as to be integrally rotatable. The stepping motor 25 has a smaller diameter than the type wheel 10, and is fixed to the motor fixing plate 13 with screws (not shown). The motor fixing plate 13 is also fixed to the chassis 9 with screws (not shown). ing. Further, the mounting position of the stepping motor 25 to the motor fixing plate 13 is fixed at a position where it does not project in the printing position direction.

FIG. 4A is a perspective view of the character selection cam.
FIG. 4B is a perspective view of the character selection cam of FIG. 4A rotated by 180 °. As is apparent from this figure, the character selection cam 14 is arranged in a spiral shape on the surface of a cylindrical cam at substantially equal angular pitches, and is a projection that operates the cam follower 15b at the other end of the latch 15 for the number of digits ( 16a to 16h in the case of the embodiment and about half the height of the protrusion 16 and extend halfway in the longitudinal direction of the character selection cam 14, and the latch 15 (4 in the case of the embodiment) of each digit. The first reset protrusion 17 for pushing the digit) to the reset position and the second reset for extending the latch 15 of the remaining digit to the reset position by extending from the middle of the reset protrusion 17 in the longitudinal direction of the character selection cam 14 similarly. The protrusion 17a has the same height as that of the protrusion 16 and extends in the longitudinal direction of the character selection cam 14, and holds the stamp face 18 of the type wheel 10 so as not to be displaced after the character selection operation is completed. Digit latch 15 A positioning projection 19 to push in place, the seal face 18, which is the character selecting
And a blank 20 for rotating the printer to the print position.

The character selection cam shaft 21 has metal 2 on both sides.
It is supported by the chassis 9 via 2. The character selection cam 14 is fixedly supported by the character selection cam shaft 21 and rotates integrally with the character selection cam shaft 21. Further, one end of the character selection cam shaft 21 is connected to the stepping motor 26 by the shaft joint 23 so that the driving force of the stepping motor 26 can be directly received. Like the stepping motor 25, the stepping motor 26 is fixed to the motor fixing plate 13 with a screw (not shown). At the other end of the character selection cam shaft 21, an encoder 4 for indicating the base point position of the character selection cam 14 is provided.
7 and a position sensor 45 that is switched by the encoder 47 are fixed to the chassis 9 with screws or the like (not shown).

A latch 15 which sequentially fixes the type wheel 10 as the character selection cam 14 rotates is rotatably supported by a latch shaft 24 fixed to the chassis 9. The cam follower 15b at the other end of the latch 15 is constantly pressed against the character selection cam 14 by a comb spring 27 which is fixed to the chassis 9 with screws or the like (not shown).

The slide 3 engages the slide protrusions 34 formed integrally with the vertically long slots 33 formed on both side surfaces of the main body 1, and relatively slides relative to the main body 1 along the long slots 33. Move up and down. A spring 35 is provided between the slide protrusion 34 and the main body 1 so that the main body 1 can be used during printing operation.
Is manually pushed downward and released, the spring 35 causes the spring 35 to return to its original position.

The ink roll 28 comprises a roll-shaped ink pad 29 and a pad case 3 made of a porous polymer material.
0, and the ink pad 29 is rotatably supported by the chassis 9 via a pad case 30 at a position where the ink pad 29 is pressed against the type wheel 10. The ink roll 28 is replaced through the ink window 31 near the center of the rear surface of the rear body 1b.

Further, a room for accommodating a plurality of batteries 32 is integrally formed on the upper portion of the main body 1, and the battery lid 6 is provided.
Open and close to replace the battery.

FIG. 5 is a system block diagram of this apparatus, which is mainly arranged on the substrate 43 fixed to the chassis 9 by screws (not shown) or the like. The input means 4 is connected to the CPU 38 of the control means 39. Control means 3
Reference numeral 9 denotes a power supply circuit 50, a transmission circuit 48, a voltage detection circuit 37 that detects the voltage of the power supply circuit 50, and a CPU 38 that collectively manages input information and memory information and executes character selection operation and display. , And drivers 40 and 41 for operating the stepping motors 25 and 26, respectively, in response to signals from the CPU 38. The display device 5, which is a display unit, is controlled by the CPU 38 of the control unit 39. The printing unit 44 includes stepping motors 25 and 26 as motors for selecting characters, a print sensor 46 for detecting a printing operation, and a position sensor 45 for detecting an initial position of the character selection cam 14.

The operation will be described below.

The print sensor 4 indicates that the printing operation is completed.
6 is confirmed, the positioning protrusion 1 on the character selection cam 14
9 pushes up the cam followers 15b of all the latches 15, the engaging claws 15a of the latches 15 are engaged with the engaging claws 10b of the type wheel 10, and the type wheel 10 is held so as not to be displaced. It waits for the character selection command of the control means 39 as it is.

A general character selection operation is a case where an arbitrary numerical value is input from the input means 4 or the numerical value changes by a predetermined amount according to a specific regularity. Assuming that the distance in the radial direction from the stamp surface 18 on the type wheel 10 to the next stamp surface 18 is 1 pitch, the control means 39 compares the current state of the type wheel 10 with the set value to be changed next. The displacement amount, which is the number of pitches to rotate the type wheel 10 relative to the type wheel shaft 7, is determined for each digit, and the stepping motor 25,
Give 26 instructions.

The character selection cam 1 up to the position where the latch 15 engages with the type wheel 10 of the girder to be rotated by the displacement amount.
4 is rotated to rotate the type wheel 10 in the direction of arrow A by the amount of displacement described above from the time when the rotation of the character selection cam 14 is completed. Here, the type wheel 10 with which the latch 15 is engaged is Since the rotation is blocked by the latch 15, the type spring 11 housed in the type wheel is attached to the type wheel shaft 7.
The engagement and disengagement with the claw portion 7a is repeated by the rotation pitch, and the relative rotation between the type wheel 10 and the type wheel shaft 7 is executed by the displacement amount. By repeating the above-mentioned operation for a necessary digit, the set value and the stamp surface 18 are made to coincide in the digit direction.

When the set value and the printing surface 18 are made to coincide with each other through the above process, at this time, in most cases, the printing position for the printing operation and the set printing surface 18 are displaced.

M: total sum of relative change pitches of the type wheel 10 and the type wheel shaft 7 s: number of the stamp surface 18 x: number of rotations of the type wheel shaft 7 y: feed pitch amount required up to the printing position y = s (x + 1)- m In order to correct the misalignment by the amount of y, the character selection cam 14 is rotated again in the next step, and all the latches 15 are moved to the type wheel 1.
After stopping at the position of the blank 20 on the character selection cam 14 which is the position not engaging with the engaging claw portion 10b of 0, the type wheel shaft 7 and all the type wheels 10 rotate integrally by the pitch amount y. By doing so, the set stamp surface 18 is aligned with the printing position, and the character selection process is completed. In this way, the character selection cam 14 is rotated again, and the positioning projections 19 on the character selection cam 14 stop at the position where all the latches 15 are pushed up, so that the type wheel 10 is prevented from being displaced by the printing operation.
5 is waiting for the printing operation while holding the type wheel 10.

When used as numbering in a series of character selection operations including the correction operation, the character ring 10 is used.
In most cases, the ink passes through the contact point with the ink roller 28 at least once, so that the ink is automatically applied when the printing surface 18 is aligned with the printing position. If the printing operation is not performed for a certain period of time after the character selection operation and the printer is left unattended, the power is automatically turned off by the control means 39, and when the power is turned on next time by the user, the type wheel shaft 7 is turned on. The ink application operation is performed by rotating the blank 20 on the character selection cam 14 once.

The display device 5 indicates that the character selection is completed in this way.
The character is selected by notifying the user using some kind of notification means such as displaying on the display, confirming the end of the character selection operation, and pushing down the main body 1 with the opening 2 of the slide 3 aligned with the printing position. Printing is performed by pressing the stamp surface 18 against an arbitrary object.

Next, the reset process will be briefly described. When an error occurs in the character selection process when the battery 32 is replaced or due to some reason, all digits are immediately reset once and then the next process is started. Character selection cam 14
By rotating the multi-digit latch 15 (4 digits in the case of the embodiment)
Is stopped at a position where the first reset protrusion 17 pushes up. Here, since the reset protrusion 17 has only about half the height of the normal protrusion 16, the latch 15 pushed up by the reset protrusion 17 can rotate only up to the half of the conventional engagement position. , The engaging claw portion 10 of the type wheel 10
Only one position in b can be engaged with the engaging claw portion 10d having a high claw height. Type ring 1 in this state
When 0 is rotated once, the rotation is blocked by the latch 15 at the position of the engaging claw portion 10d where all the digits are provided at the same position, and a mechanical reset operation can be performed. Similarly second
The reset protrusion 17a is also subjected to the above-mentioned operation to reset the rest of the character wheel 10 which has not been reset, and the character selection cam 14 is rotated to the initial position to complete the reset step.

[0028]

As is apparent from the above description, the electronic numbering device of the present invention uses a motor having a weak driving force such as a stepping motor, but it can be applied to a plurality of steps with a large load torque. The divided operation has an excellent effect that the reset operation or the like can be surely executed by reducing the load torque applied to each operation.

[Brief description of drawings]

FIG. 1 is an external view of an electronic numbering device.

FIG. 2 is a front sectional view of the device.

FIG. 3 is a side sectional view taken along the line aa in FIG.

FIG. 4A is a perspective view of a character selection cam. (B) (a)
It is a perspective view in the state which rotated the character selection cam of the figure 180 degrees.

FIG. 5 is a system block diagram of the present apparatus.

[Explanation of symbols]

 4 Input Means 5 Display Device 10 Type Wheel 14 Character Selection Cam 15 Latch 16 Protrusion 17 Reset Protrusion 17a Reset Protrusion 39 Control Means 44 Printing Means

Claims (1)

[Claims] 1. An input means (4) for setting and inputting data to be printed, a display device (5) for displaying data input by the input means (4), and based on the input data. And a printing unit (44) for printing the value set by the control unit (39) on an arbitrary object by a plurality of printing wheels (10). In the electronic numbering device, a movable character selection cam (14) having a protrusion (16) for sequentially selecting the plurality of type wheels (10),
Provided for each of the plurality of type wheels (10),
And a latch (15) capable of engaging and disengaging corresponding to each type wheel (10), and a reset step for aligning the respective type wheels (10) on the character selection cam (14) so that the digits are aligned. At this time, a plurality of reset portions (17, 17) for sequentially acting on each set of the plurality of latches (15) and aligning the corresponding type wheels (10) through the respective latches (15) of the set. 17a) is provided. An electronic numbering device.