JPS59153106A - Key-shape detecting device for cylinder lock - Google Patents

Abstract

PURPOSE:To read the shape of a key without contact by a non-mechanical way, by providing a light source and a light receiving part at the upper and lower parts of the key to be detected, and using an electric signal, which is generated from the light receiving part in correspondence with the size of the shape of the key as data for assembling a cylinder lock. CONSTITUTION:A key to be detected 3 is inserted in a measuring position. Light is projected from the upper part of the key 3. The projected light, which is transmitted through the key 3, is inputted to a light receiving part 4. The light receiving part 4 sends the received light signals of photoelectric conversion parts of sectors to an analog multiplexer 10. The analog multiplexer 10 selects the received light signal for every sector and sends the signal to an adder 14. To a subtrator 14, a calibrating signal for each corresponding sector and the actuatlly measured received light signal from the key 3 are simultaneously inputted. The deviation signal is sequentially obtained for every sector. An AD converter 15 performs AD conversion of the output of the subtrator 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a key shape detection device for a cylinder lock, and particularly to a key shape detection device for a cylinder lock piece that is effective when assembling a cylinder lock.

Automatic assembly equipment for a cylinder part of a cylinder lock,
A method is used in which the depth of the groove of a key that has already been cut out is read out, and a cylinder lock is assembled according to the depth of the groove. Traditional automatic keyway depth readings have been made by mechanical methods. Explain in detail.

First, the grooved key is inserted into the detection mechanism section.

In the detection mechanism, when the key is inserted, a lever corresponding to each groove moves forward and stops when it comes into contact with the respective groove. The lever is L-shaped, with one corner serving as the center of rotation, and the short side touching the groove. Since the ratio of the short side to the long side of the lever is large, the enlarged long side of the lever is used as a stopper to stop the holder that holds the bottle corresponding to the groove depth, and each bottle is placed in the cylinder. do.

Such mechanical methods may result in lever wear or poor lever movement, which may result in incorrect cylinder lock assembly. Furthermore, if the key is inserted into the detection section with chips still attached to it, it may cause malfunction. Furthermore, if chips adhere to the detection lever side, the process will continue until the chips are removed.
They keep producing defective products.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder tablet key shape detection device that detects the key shape in a non-contact and non-mechanical manner.

The gist of the present invention is as follows. A light source and a light receiving section are placed above and below the button 1 to be detected. The light receiving section is configured to generate an electric signal 7 proportional to the size of the shape of the key. This electrical signal is captured and used as information for assembling the cylinder lock.

Furthermore, the present invention takes a configuration in which it is necessary to compensate for changes over time in the light source and changes over time in the light-receiving section.This configuration allows measurement to be performed without a key before inserting the key into the measurement position. , the configuration is to import it as preset data via the light receiving section.
o This preset data is used to calculate the deviation from the measured value when the key is inserted and measured. The deviation result is an accurate measurement value.

Hereinafter, the present invention will be explained in more detail in the drawings.

FIG. 1 shows an embodiment of the measurement system of the present invention. One light source 1 is an irradiation light source 7. Lens 2 converts the irradiated light from light source 1 into parallel light rays. The key 3 is a key for shape detection, and the key 3 is arranged so that the flat part of the irradiated light a is received (
(See FIG. 3) 8 The light receiving section 4 detects the light beam that passes through the key 3, and generates an electric signal according to the ridge shape of the key.

FIG. 2 is a perspective view of the light receiving section 4. FIG. The light receiving section 4 has a large number of photoelectric conversion sections 40Y. Each photoelectric conversion section 40 is separated by a slit 41. Each photoelectric conversion section 40 generates one electric signal proportional to the size of the area of light received by the conversion section. Therefore, if there are 16 photoelectric conversion units, 16 electrical signals can be extracted in parallel.

FIG. 3 shows a positioning device for positioning the key 3 in the measuring position. The key 3 is inserted from the direction of the arrow, inserted between the reference bottle 7 and the pusher 5 supported by the spring 6, and fixed. The reference bottle 7 is fixed and the key is fixed by the pusher 5 due to the compression of the spring 6. In the measurement, a parallel light beam is irradiated onto the flat surface of the key 3. When the measurement is completed, the key 3 is removed from this position, and a key for the next measurement is automatically inserted and positioned. The same applies below.

FIG. 4 is a diagram showing the positional relationship between the light receiving section 4 and @13 positioned in FIG. 3. In this figure, the reference bottle 7 and gutsher 5 are omitted from the irradiation surface.

The reason for this omission is that the reference bottle 7 and the pusher 5 may be made of transparent material. When the object is non-transparent, the bottle 7,
The pusher 5 projects onto the photoelectric section as a pattern. However, depending on the size of the key 3 and the photocathode, they can be removed as unnecessary items.

Now, in FIG. 4, each photoelectric section 40 generates an electric signal corresponding to the area of the key shape irradiated onto its photocathode. for example,
When the photoelectric section 40 is divided into 16 sections, signals 2 corresponding to the irradiation area within the 16 sections are generated from the 16 sections.
Occur. In the figure, the part where key 3 is present is black (without transparent light, indicated by diagonal lines), and the other parts are white (with transparent light)
It is shown by .

Electrical signals are generated within each section depending on the shape of the section, especially the state of the mountain cut. Therefore, the 16 signals from these 16 sections indicate each mountain cut V (other portions are included, of course), and serve as data for cylinder lock assembly. Note that 16 is just an example, and an appropriate value can be set based on factors such as the size of the key, the number and size of the ridges, and the accuracy of assembly. The 16 points are so-called sample points, and it is possible to set as many as 32, 64, or even 8 points.

FIG. 5 shows an embodiment of an electric circuit that extracts and processes signals from the light receiving section 4. As shown in FIG. The light receiving section 4 outputs a number of signals corresponding to the number of divisions. Analog multiplexer 0 selects this number of divisions of signals in an analog manner and outputs them for each division. Therefore, for example, if the number of sections is 16, 16#J
The 16479 signals for each cD section are converted into series by an analog multiplexer 1o, and the 16479 signals are connected in series.
signal.

Analog multiplexer 1o is demultiplexer 11
or adder 14. The demultiplexer 11, sample hold circuit 12, and analog multiplexer 13 form a circuit for obtaining a calibration signal.

That is, the light receiving section 4 is irradiated with light without being inserted into the m3 measurement position. Is the signal for each section of the light receiving section 4 analog multi-Zorek? 10 K are taken in, and this analog multiplexer] 0 selects the received light signal for each division and sends it to the demultiplexer 11. The demultiplexer 11 demultiplexes the received light signals within the divisions of the analog multiplexer 10 that are sent in a time-division manner, and selects and outputs them to the sample and hold circuit 12 . The sample and hold circuit 12 has two sample bold elements corresponding to the number of sections, and samples and holds the received light signal in each section, which is the demultiplexed output of the demultiplexer 11, into a corresponding sample bold element. Collection of correction signals ends when demultiplexing of all the number of sections is completed and storage in the corresponding sample-hold elements is completed.

After the calibration signal has been collected, the detection key 3 is inserted into the measurement position. After this insertion and positioning, irradiation is applied from the top of the light-seeking key 3. The light transmitted through the key 3 by this irradiation is
Light receiving section 4. incident on . The light receiving section 4 sends the light receiving signals of the photoelectric conversion sections of each section to the analog multiplexer 1o. The analog multiplexer 10 selects the received light signal every 1g and sends it to the adder ]4.8 At this time, the demultiplexer 1
Separate input 1. Therefore, demultiplexer 1
The 1' optical signal measured by inserting the key 3 into 1 is not input.

On the other hand, the scanning speed of the analog multiplexer 13 is
The scanning speed of the analog multiplexer 1o is set to match the scanning speed of the analog multiplexer 1o when the analog multiplexer 1o is inserted.

As a result of this failure, the mutual calibration signals of the corresponding sections and the actually measured light reception signal from the key 3 are input to the subtracter 14 at the same time. The subtracter 14 subtracts the calibration signal from the received light signal (or vice versa) to obtain a deviation signal. This deviation signal is a value obtained by subtracting the calibration signal 2, and is a value that is not affected by deterioration of the light source, deterioration of the light receiving section 4, etc.

Thus, the subtracter 14 outputs the deviation signal one after another for each section, and its output is input to the AD converter 5.

The AD converter 15 performs AD conversion on the output of the subtracter 14.

FIG. 6 is an embodiment of the control system of the cylinder lock assembly device. The microcomputer 16 runs the program-4
It is stored in a ROM (memory) and operates according to the contents of the ROM. Furthermore, the microcomputer 16
It has an AM (memory), and the data corresponding to the key as the object to be examined is stored in the RAM.

This key-corresponding data is the output of the AD converter 15, which is the output of the circuit shown in the fifth IK.

The procedure for storing data of the AI converter 15 in this RAM is as follows. The microcomputer 16 inputs the AD conversion output of the AD converter 15 into corresponding categories. Therefore, 16
If there are 16 divisions, received light data corresponding to 16 divisions can be obtained. The received light data corresponding to this classification is stored in the RAM.

Key 3 is not limited to one type of glaze, but generally includes multiple types. Therefore, the aforementioned light reception data is obtained for each key, and the light reception data is stored in the area of the RAM corresponding to the key.

The received light data stored in this RAM is read out in correspondence with the key when assembling the shilling-lock, and is outputted via the DA converter 17. The control section 18 of the cylinder lock assembling device latches this output signal, and assembles a cylinder lock according to the size of the output code. Incidentally, the received light data corresponding to the keys is classified into categories, and the control unit 18 also assembles the light reception data corresponding to each category. Therefore, the output from the DA converter 17 consists of two types: a display section indicating the division and a signal indicating the proportion of light reception in that division. Of course, a method such as displaying the classification according to the sending order may also be adopted. In addition, the light receiving section and the control section 18
may not necessarily match the control unit classification during assembly. For example, there may be a case where there are 16 light receiving sections and 8 assembly control unit sections, or vice versa. In this case, it is necessary to perform correction (complement) means within the microcomputer 17 so that the two match.

Note that a smaller size of the slit 41 contributes to improved accuracy. If you use CCD'&, slit is unnecessary and 1
Entire area can be measured with high accuracy. Furthermore, I removed two lenses,
A rod-shaped light source 7 may also be used.

According to the present invention, since non-contact shape detection can be performed, a highly accurate and long-life shape detection device can be provided.

Furthermore, a signal for error correction was obtained, and the actually measured signal was calibrated using this signal, making it possible to perform highly accurate detection.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the measurement system of the present invention, Fig. 2 is a perspective view of the light receiving part, Fig. 3 is a key positioning diagram, Fig. 4 is a diagram showing an example of detection of the light receiving part, and Fig. 5 is a diagram showing a detection example of the light receiving part. Circuit diagram of signal processing from light receiving section,
FIG. 6 is a diagram showing the control system of the single cylinder lock assembly device. 1...Light source, 2...Lens, 3...Key 1.4...
- Light receiving section, 40... Photoelectric conversion section, 41... Slit. Takeho Applicant: Hitachi Electronics Engineering Co., Ltd. Patent Attorney Juju Hon-Masa Figure 1 Figure 2 Figure 3 Figure 4 - 4041'+Li 41 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A means for irradiating a key of a cylinder lock piece placed at a measurement position, and a means for receiving reflected light or transmitted light from the key due to the irradiation, and receiving light corresponding to the shape of the key thread of the key. A cylinder lock for assembling a cylinder lock, comprising a part, a means for taking in the light reception signal from the light receiving part and calibrating it with a calibration signal of a measurement system, and a means for taking in the output from the calibration means and storing it as data for cylinder lock assembly. Key shape detection device. 2. The signal for calibration of the measurement system is a signal obtained by irradiating light from the above means without placing the key of the cylinder lock at the measurement position and without using the light receiving section. key shape detection device. 3. The light receiving section has a planar shape and is composed of a plurality of photoelectric conversion sections separated by a plurality of slits, and each photoelectric conversion section corresponds to the size of the area of the light irradiated onto the light receiving area of the conversion section. A key shape detection device according to claim 1 or 2, which is configured to output a signal.