JPS6150792B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character wheel feed detection device for a rotary number printing machine, and is used to detect when a character wheel has a half-turn, co-rotation, non-rotation, etc. This relates to a device that detects a defective signal.

Generally, New Year's postcards with lottery tickets, cash certificates such as securities, etc. are given consecutive numbers in order to ensure proper management and inspection. Consecutive numbers are usually printed using a printing machine equipped with a number printing device after printing the main text of the vouchers.

By the way, as is well known, number printing machines print a unique number on each coupon by intermittently feeding the wheel of each digit by transmitting an external force from an arm to a mechanism consisting of a feeding pawl, a ratchet, etc. ing.
In other words, the number or type feed of the type wheel of the number printing machine is based on a mechanical feed mechanism. For this reason, defective character wheel feeding often occurs during character wheel feeding and carry.

Inadequate letter wheel feeding can include half-turning (a phenomenon in which the letter wheel does not rotate at a certain angle and stops rotating midway), co-rotation (a letter wheel that should not rotate rotates as another letter wheel rotates). (a phenomenon in which the character wheel does not rotate when it should), non-rotation (a phenomenon in which the character wheel does not rotate when it should), etc.

When half-turning occurs, there may be blanks in some of the numbers, or the numbers may become inconsistent, and such coupons no longer have any value as products. Also,
When co-rotation or mis-rotation occurs, the wrong number is printed, and the coupons with the corresponding number are duplicated or missing, resulting in extremely unpleasant results. Traditionally, such printing defects are checked by visual inspection by inspectors during or after the number printing process.
Removal or replacement.

However, since the serial numbers are usually printed not only in one place but in many places on each coupon, a great deal of time and effort is required to inspect the numbers. Therefore, it is a good idea to detect such printing defects in advance during the number printing process and remove them or replace them with normal ones in order to reduce the labor involved in the later inspection process. This is desirable for the purpose of achieving this goal.

The present invention has been made in view of this point, and is intended to reduce the work involved in the inspection process by making it possible to detect defective letter wheel feeding in a rotary number printing machine.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an example of a rotary number printing machine.

In the figure, 10 is a shaft, 12 is a mount ring fixed to the shaft, 14 is a number plate, 16 is a cam groove fixed to the machine frame (not shown), and 18 is an arm of the number plate that engages with the cam groove. 20 is a bearing, 20 is a number wheel, and 22 is an inking roller.

Printing by this number printing machine is performed as follows. As the shaft 10 rotates, a sheet or continuous paper of a cash voucher or the like, on which text is preprinted, flows on the running path 24 from the left side of the figure. Number device 14
revolves around the shaft 10 in synchronization with the supply of paper, and after printing a certain number, the number device 14-1 updates the printing surface of the character ring within the range of θ by the cam groove 16, and the number The character wheel feeding is completed at the position corresponding to the container 14-2, and then, after being supplied with ink by the inking roller 22, it is rotated again to the original position and the updated numbers are printed.

Each time the above operation is repeated, a different number is printed on each paper, but during this time, even if the arm is activated by the cam groove 16, the number wheel 20 malfunctions, and the number wheel turns half a turn, causing the number machine to rotate simultaneously. It has already been mentioned that malfunctions such as turning and non-rotation may occur.

Therefore, in the present invention, as a character wheel feed detection device, as shown in FIG.
Magnets 28 are provided on the circumferential surface of the number 0 in correspondence with the letters 26, and as shown in FIG. They are placed in a row.

The magnets 28 are all the same size as the other magnets, and in addition to being buried as shown, they can be screwed in, injected with a fluid magnetic substance, pasted, pasted as magnetic tape, or locally magnetized on the letter ring itself. It can be attached with The Hall element 30 needs to be installed so as to face the locus of the magnet 28 within the range of an angle θ at which a resultant velocity due to the revolution and rotation of the character wheel 20 accompanying the rotation of the shaft occurs. The Hall element row 30 is supported by a rod-shaped support member 32, for example.

By cooperating the magnet 28 and Hall element 30 with timing setting means, only the truly necessary signals can be extracted therefrom.

Setting the timing can be effected from the drive of the number printing machine, for example from the shaft 10, by the use of cams and microswitches (not shown).
In this case, the number of cams is determined by the number 14 in the shaft circumferential direction.
, and the point in time at which the cam presses the switch is made to coincide with the point in time when the letter wheel comes to the angle .theta. at which type feed is being carried out.

As another means for setting the timing, it is also conceivable to provide a timing element corresponding to each column of the number machine 14 in the shaft axis direction and to detect this with a detector. These may be similar to the magnet 28 and Hall element 30, or may be metal protrusions and proximity switches. Further, it may be a combination of a photoelectric conversion element and a light source, or a combination of an eddy current detection element and a current source.

Next, the operation of the present invention will be described based on FIG. In the figure, 20a, b, c... are character wheel groups in an arbitrary numberer 14-1. First, a case where the character wheel 20b makes a half turn will be described. During rotation of the shaft, each time each column of numberers 14 in the shaft axial direction passes under the Hall element 30b, the timing detection Hall element emits a timing signal and a Hall voltage is generated in the Hall element 30b.

In this case, the Hall element 30b does not face the magnet 28 of the half-turned wheel 20b, so a small Hall voltage is generated. Then, when a signal comes from the detector 36 that detects the timing element 34,
A signal is sent to comparator 40b through AND circuit 38b. A reference voltage is set in the comparator 40, and the above-mentioned Hall element 3
When the signal voltage from 0b is low, comparator 4
A signal is emitted from 0b. This signal turns on the F/F circuit 44 via the OR circuit 42, and activates the alarm device 46 to issue an alarm that a half rotation has occurred. Furthermore, this signal can also be used to stop the printing press or to attach a mark to defective paper.

Next, a case where co-rotation or non-rotation occurs in a certain character wheel 20b will be described. In this case, a multiplexer 48 is provided to detect the occurrence of co-rotation and non-rotation, and a counter 50 and a memory 52 are provided for each numberer 14 in the shaft circumferential direction. Further, the Hall element 30 is provided within the angle θ. Character wheel 20b
If it rotates with another character wheel, for example 20a, even though there is no carry, or does not rotate even though there is a carry, then the Hall element 30b generates a Hall electromotive force corresponding to the renewal of the character wheel, or the Hall voltage increases. It does not occur at a given size. Therefore, when the timing signal comes from the OSM 54, the Hall electromotive force signal corresponding to the co-rotation passes through the gate circuit 38b.
The signal is input to the multiplexer 48 by operating the OSM 56b. On the other hand, since the unrotated signal does not reach the OSM threshold, it is not input to the multiplexer. The multiplexer 48 has counters 50-1, 50-1' corresponding to the number machine 14-1.
and selects memory 52-1. The signals from the counters 50-1, 50-1'... pass through a delay circuit 58 and a gate circuit 62 whose gate is opened by the strobe pulse coming from the OSM 60, and then reach the memory 52-1. It reaches 64. The matching circuit 64 compares the previous value from the memory 52-1 with the current value from each character wheel, detects that there is not a predetermined numerical difference as a result of co-rotation, and issues a signal. On the other hand, in the case of a mismatch, the difference between the previous value and the current value is not the predetermined value, so a signal is output from the matching circuit 64. For example, taking the decimal wheel as an example,
The above predetermined value, that is, the difference between the previous value and the current value, is 1 for the lowest digit wheel, and for digits other than the lowest digit, the next lower digit changes from 9 to 0.
It becomes 1 only when the value changes to , and 0 otherwise. The signal outputted from the matching circuit 64 passes through the OR circuit 42 and is turned into a flip-flop (F/F/
F) Activate 44 and activate alarm device 46. Alternatively, activate the drive stop device of the printing press.

Incidentally, as shown in FIG. 4, processing can also be performed using only the matching circuit 64 without using the memory circuit 52 or the like. In this case, the criterion for judgment is the counter 50-
1, 50-N is used to count the number of rotations of the cylinder or the number of printed sheets based on the signal from OSM54, and if the value and the number counted from the letter ring do not match, non-rotation or co-rotation will occur. A signal is output from the matching circuit 64 when it is determined that the
The F/F 44 is operated via the circuit 42.

That is, in the coincidence circuit 64, the counters 50-1, .
... Compare each signal of 50-N with each signal of counter 50-1', which counts the number of outputs of the Hall element signal obtained by detecting the rotation of the letter wheel, and 50-N'. If they do not match, it is determined that malrotation or co-rotation has occurred and a signal is output.

The above signal processing device is provided for each row of numberers in the shaft circumferential direction. In such a configuration, since the counter, memory, etc. are selectively used by the multiplexer, the input section, display section, and judgment section can be shared. Therefore, the device can be simplified to that extent. Note that the delay circuit 58 in FIG.
The OSM 60 delays the STRB signal, which is the gate signal of the matching circuit 64, by the delay in calculation time at the multiplexer and counter.

As described above, the present invention provides a rotary number printing machine with a magnet provided on the circumference of the numbering wheel corresponding to each character, and a magnet corresponding to each character wheel at the location where the character wheel is fed. Since the sensor is equipped with a Hall element, it is possible to accurately detect not only when the character wheel half turns, but also when malfunctions such as co-rotation or non-rotation occur. I can do it. Also,
Since the Hall element is installed where the letter ring can be rotated, it is possible to detect that the letter wheel is moving. Therefore, it is possible to detect co-rotation and non-rotation even without special processing to form a code pattern on the magnet.

Moreover, the above means that it becomes easy to detect printing defects during the number printing process, and the subsequent inspection process can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of a rotary number printing machine to which the present invention is applied. FIG. 2 is a partially cutaway side view showing an example of a character wheel used in the present invention. FIG. 3 is a block diagram of the signal processing device, and FIG. 4 is a partial modification thereof. 10...Shaft, 14...Number, 16...
Cam groove, 20... Character wheel, 24... Paper running path, 2
6...Print, 28,34...Magnet, 30,36...
...Hall element, 40...Comparator, 42...
OR circuit, 44... F/F circuit, 46... Alarm device, 48... Multiplexer, 50... Counter, 52... Memory device, 54, 56... OS
M, 58...Delay circuit, 60...OSM, 62...
...gate circuit, 64...matching circuit.

Claims (1)

[Claims] 1. A character wheel feed detection device for a rotary number printing machine comprising the following items. a. Magnets provided on the circumferential surface of the letter ring of each number plate installed around the shaft, corresponding to each character b. and a Hall element c installed so as to face each character wheel at a location where character wheel feeding is performed.Every time each row of the shaft axial direction row of the number plate faces the Hall element row. Timing setting means d for extracting a signal from the Hall element at a time d; Means e for generating a half-circle signal when the output signal extracted from the Hall element is smaller than a reference signal; The number of outputs of the signal of the Hall element for each wheel is counted, and if the difference between the current value and the previous value of the counted value is not a predetermined value, or the number of outputs of the signal of the timing setting means and each When the value calculated by counting the number of outputs of the Hall element signal for each number wheel does not match,
Means for generating a signal indicating whether the wheels are rotating together or not. 2. The character wheel feed detection device according to claim 1, wherein the timing setting means is configured to take out a timing signal from a drive unit of a number printing machine. 3. The character wheel feed detection device according to claim 1, wherein the timing setting means comprises a timing element provided corresponding to each shaft axis direction row of number indicators and a detector for the element. 4. The character wheel feed detection device according to claim 1, wherein the row of the number dials in the shaft circumferential direction or the shaft axial direction is one row. 5. The character wheel feed detection device according to claim 1, wherein the numbers are arranged in a plurality of rows in the shaft circumferential direction and in the axial direction. 6 Claim 1, in which the number device is one
Character wheel feed detection device described in section.