JP4569896B2 - Magnet key manufacturing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manufacturing apparatus (hereinafter simply referred to as a manufacturing apparatus) of a magnetic key used for locking and unlocking a magnetic tumbler lock.
[0002]
[Prior art]
It is no exaggeration to say that there has been no automatic magnet key manufacturing apparatus of the type in which a magnet is embedded in the side edge of the key stem portion.
[0003]
Then, as to how the magnet key was manufactured, for example, a manufacturing method disclosed in Japanese Patent Publication No. 2-41637 can be cited.
[0004]
In the manufacturing method described in the publication, a plurality of recessed portions for accommodating magnets are formed at predetermined positions of a non-magnetic material magnet key, and at least one small protrusion is formed in the vicinity of the opening edge of each recessed portion. The main body forming step to project, the magnet filling step to fill each concave portion with a magnet with the magnetizing direction in a predetermined direction according to the key difference of the corresponding magnet tumbler lock, and the small projection of each concave portion And a magnet fixing step in which the inner side surface of the recessed portion is plastically deformed so as to be bent and protrude toward the magnet side by crimping, and the magnet is pressed and clamped more strongly to the inner side surface of the recessed portion and fixed. is there.
[0005]
However, according to the manufacturing method as described above, it is necessary to fill each concave portion with a magnet while checking the direction of the magnetic pole by hand, and there is a disadvantage that the productivity is very low. .
[0006]
In addition, a permanent magnet preliminarily magnetized is embedded in each of the plurality of recessed portions formed in the key material in a predetermined attaching / detaching direction, and a small protrusion formed near the opening edge of the recessed portion is caulked. Since the machine key was used to make the finished product magnetic key, the direction of the magnetic pole is often mistaken in the middle.
[0007]
Furthermore, if the mechanical processing at the final caulking point is not performed properly, the key body and the magnet will crack, and the product will tend to be defective, and the magnet key will have to be remanufactured as a whole. It was.
[0008]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus capable of automatically manufacturing a magnet key, thereby improving productivity and remarkably reducing the defective rate in manufacturing the magnet key.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention magnetizes magnet materials arranged in the length direction of the side edge of the key material in the width direction of the key material in accordance with the key signal. Te, the side edges of the stem portion of the non-magnetic metal material made of the key material, and a work table for temporarily fixing a workpiece which is embedded a plurality of magnetic material along its length, is fixed to the worktable One magnet is arranged for each side edge of the workpiece, and is guided so as to be movable along the length direction in a state of being opposed to the corresponding side edge . Magnetizing means for instantaneously supplying a magnetizing current by electric discharge, a moving table for moving the magnetizing yoke along the length direction of the workpiece, and the presence or absence of magnetization of each magnet material of the workpiece The memory that stores the key signal set with, and the work fixed to the work table Reads the corresponding key signals, the magnetizing yoke while moving to match the respective magnetic material, a key material this by setting whether or magnetizing direction of magnetization in response to a key signal corresponding to the magnetic material And a control device that magnetizes only from one direction from the outer surface of the side edge toward the center .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
In the present invention, as shown in FIG. 1 (A), the stem portion (main body portion) 1a of the key material 1 made of a non-magnetic metal material is arranged along the longitudinal direction of the side edge thereof as described later. A plurality of recessed portions 2 having a cylindrical shape or other arbitrary shape for fitting and fixing the magnet material 3 are formed in rows at appropriate intervals (pitch). The rows of the recessed portions 2 may be one row or a plurality of rows.
[0011]
In the illustrated example, the concave portion 2 is provided such that its central axis is directed in the width direction of the key material 1 [vertical direction in FIG. 1A], but the coaxial line is the thickness of the key material 1. It may be provided so as to be directed in the vertical direction [direction perpendicular to the paper surface in FIG. 1A].
[0012]
Further, in the key material 1, a small protrusion or small protrusion for caulking (both not shown) for fixing the magnet material 3 put in the recessed portion 2 is provided near the opening edge of the recessed portion 2. It can be provided integrally.
[0013]
The concave portion 2 and the small protrusion or small protrusion described above are simultaneously formed when the key material 1 is formed by die-casting together with the protrusion 4 to be drilled with a bowl-shaped key hole (not shown) that engages with the pin tumbler. It is acceptable to form.
[0014]
The magnet material 3 to be inserted into each recess 2 of the key material 1 is made of a ferromagnetic metal material and has the same shape as that of the recess 2, such as a columnar shape or any other arbitrary shape. It is to be wearing.
[0015]
The non-magnetized magnet material 3 fitted in each recess 2 of the key material 1 by an appropriate supply device is configured to plastically deform the edge of each recess 2 by tightening the above-described small protrusions (none of which are shown). Fixing means, fixing means using an adhesive, or covering means for covering the stem portion 1a of the key material 1 with a thin sheath made of a nonmagnetic metal material [see FIG. 1 (B)] .
[0016]
The workpiece W [see FIG. 1 (B)] configured as described above is temporarily fixed to the workpiece base 51 of the magnet key device 5 according to the present invention, as shown in FIGS.
[0017]
The work table 51 is a block body made of a non-magnetic material having a work holding hole (not numbered) having the same cross section as the keyhole ward of the magnet tumbler lock, and the work W is inserted into the work holding hole. Thereafter, the workpiece is pressed against the inner bottom surface of the holding hole by, for example, clamping means 52 that moves up and down by an air cylinder (not shown), and temporarily fixed to the manufacturing apparatus.
[0018]
In the illustrated embodiment, as shown in FIG. 3, horizontally long bowl-shaped recessed portions 51a into which a later-described conical magnetized yoke can be engaged are formed on both side surfaces of the work table 51. The side edge of the workpiece W is exposed on the bottom surface of the portion 51a.
[0019]
Further, the manufacturing apparatus 5 includes at least one (two in the illustrated example) magnetizing yoke 55 including an electromagnetic coil and an electromagnetic yoke in the front-rear direction, that is, the length of the key material 1 fixed to the work table 51. It is provided so as to be movable along the vertical direction (left-right direction in FIG. 3).
[0020]
2 and 3, an electric moving table 56 provided on a base 53 supports X / Y-axis sliders 57, 57 arranged on both the left and right sides. The magnetizing yoke 55 is provided so as to be adjustable.
[0021]
The magnetizing yoke 55 on each X / Y-axis slider 57 is finely adjusted in the front-rear direction and the left-right direction by a micrometer-like screw device having a first adjustment knob 58 and a second adjustment knob 59, respectively. It is.
[0022]
In FIG. 2, the magnetizing yoke 55 and the workpiece W are drawn so as to be separated from each other, but this is for the purpose of clearly showing the constituent members of the magnetizing device 5 and actually operates the manufacturing apparatus. In the preparation stage, the second adjustment knob 59 of the X / Y-axis slider is turned to bring the magnetizing yoke 55 close to the workpiece W, and the gap between the side edge and the tip of the magnetizing yoke 55 is set to 0, for example. Set to about 5 mm.
[0023]
Further, the first adjustment knob 58 is turned to adjust the position of the magnetized yoke 55 in the length direction of the workpiece W.
[0024]
Then, the magnetized yoke 55 is placed at the reference position on the left side of the magnet material 3 at the left end of the work W in FIG. 3, and that position is set as a standby position.
[0025]
On the other hand, a known ball-containing screw feed device (not shown) is incorporated in the moving table 56, and this feed screw is also configured to be driven by a pulse motor (not shown). In FIG. Move in the length direction.
[0026]
By controlling the number of control pulses supplied to the pulse motor, the amount of movement of the moving table 56 can be precisely controlled. The movement table 56 is controlled by control means using a personal computer, which will be described later.
[0027]
Further, the rotation direction of the pulse motor, that is, the movement direction of the moving table 56 can be switched by supplying the control pulse input terminal to the reverse input terminal.
[0028]
On the other hand, the control device 6 of this manufacturing apparatus is configured as shown in FIG. That is, in FIG. 4, reference numeral 60 denotes a DC power supply, and the voltage of the DC power supply 60 is converted to a large-capacity capacitor 62, an electromagnetic coil 63 (see FIG. 2) of the magnetizing yoke 55, The charging resistor 64 is applied to a serial connection.
[0029]
A first normally open switch device 65 such as an electromagnetic relay is connected in parallel to the magnetic pole switching device 61, and a second normally open switch device 66 is connected in parallel to the charging resistor 64. These first and second switches A magnetization signal MS is supplied to the trigger input terminals of the devices 65 and 66 via the monostable multivibrator 67.
[0030]
The power supply device 60, the magnetic pole switching device 61, and the charge / discharge circuit constitute the magnetizing means 16.
[0031]
With the configuration described above, in a normal state where the magnetization signal MS is not input, the charging circuit including the capacitor 62, the electromagnetic coil 63, and the charging resistor 64 is charged with a predetermined time constant.
[0032]
On the other hand, when the magnetizing signal MS is supplied, the first and second normally open switch devices are closed, and a discharge circuit is formed by the capacitor 62 and the electromagnetic coil 63. A strong magnetic flux from the magnetizing yoke 55 flows through the coil 63 and passes through the magnet material 3, and this magnet material is magnetized by a predetermined magnetic pole.
[0033]
Note that the output pulse width of the monostable multivibrator is set to at most about twice the time constant of the discharge circuit, so that the preparation for the next charging can be completed efficiently.
[0034]
On the other hand, the magnetic pole switching device 61 is configured as follows. That is, the first magnetic pole signal for magnetizing the outer end surface of the magnet material 3 to the N pole is supplied as the set signal SS to the set input terminal of the set-reset type flip-flop 67, and the obtained positive output is supplied to the amplifier. 68 is supplied to a drive coil 69 of a double-pole double-throw relay.
[0035]
When the four fixed contacts of the relay are connected in an X shape as shown in the figure, one pair of fixed contacts is connected to the DC power source 60 and the other pair of fixed contacts is connected to the charging circuit, the set signal SS The direction of the voltage of the DC power source applied to the charging circuit is switched depending on whether or not it is supplied. Accordingly, the direction of the discharge current during the discharge is switched, so that the magnetic pole of the magnet material 3 is switched.
[0036]
The second magnetic pole signal for magnetizing the outer end surface of the magnet material 3 to the south pole is supplied as the reset signal RS to the reset input terminal of the flip-flop 67, and the positive output is extinguished. Then, the current to the relay drive coil 69 is cut off, and the output voltage of the magnetic pole switching device 61 is switched.
[0037]
These devices constituting the control device 6 are controlled and controlled by the personal computer 70, and a flowchart thereof is shown in FIG. In FIG. 5, Pi (i = 1 to 11) indicates the step.
[0038]
In step P1, this control software is started up, and in step P2, input of a key number is awaited. Here, the key number is an identification number that distinguishes the key from other keys when the work temporarily fixed on the work table is completed and becomes a magnet key. It is a number with several digits.
[0039]
When the work is set on the work table 51 and its key number is input to the personal computer 70, a key signal group corresponding to the key number is read out in step P3 and temporarily stored in the temporary memory.
[0040]
Here, the key signal is information that combines the position of the magnet material 3 in the workpiece W and the magnetization direction or whether the magnet material is a dummy magnet without being magnetized. For example, refer to FIG. To explain, when magnetizing the magnet material 3 in order along the direction of the arrow P, when magnetizing the first magnet material 3 so that the outer end surface is N-pole, (1-N) is the first magnet. Assign as a key signal.
[0041]
Similarly, the second key signal is (2-S), and since the fifth magnet is a dummy magnet as the unmagnetized material 3a, (5-0) is assigned.
[0042]
These key signals are stored in a memory such as an FD (floppy disk) as n groups, for example, 14 key signal groups, for each key number.
[0043]
Next, in step P4, the first unread key signal group is read, and in step P5, for example, the magnetizing yoke 55 that was in the standby position is moved to a position that is aligned with the first magnet material 3.
[0044]
For this purpose, for example, as shown in FIG. 4, the feed signal FS is supplied to the pulse motor 71 to drive the moving table 56.
[0045]
Next, in step P6, it is verified whether the magnet material 3 facing the magnetizing yoke 55 is a dummy magnet. If the magnet material 3 is a dummy magnet, the process returns to step P4 to read the next key signal.
[0046]
When not using a dummy magnet, the first magnetization signal SS (see FIG. 4) or the second magnetization signal RS is supplied to the magnetic pole switching device 61 according to the contents of the key signal in step P7 to set the magnetization direction. To do.
[0047]
Next, in step P8, the magnetizing signal MS is supplied to the body 1 and the second normally open switch devices 65 and 66 (see FIG. 4), and a large current is instantaneously supplied to the electromagnetic coil 63 by the discharge of the capacitor 62, thereby generating a magnet. The material 3 is magnetized in a predetermined direction.
[0048]
After magnetization, whether or not all the key signals have been read out is verified in step P9, and if there are those that have not been read yet, the process returns to step P4 and the above operation is repeated. The magnetizing yoke 55 is returned to the original standby position to end the program and wait for the next workpiece W.
[0049]
In the illustrated embodiment, there are magnetized yokes 55 on both sides of the workpiece, which are switched for use. In FIG. 5, the switching step is omitted, and only one side is described.
[0050]
【The invention's effect】
According to the magnet key manufacturing apparatus of the present invention described above, a process up to a process in which a defective product is relatively likely to occur, that is, a process of fitting and fixing a non-magnetized magnet material in the recessed portion of the key material. If the target process is completed in advance, all or part of the plurality of magnet materials properly embedded in the key material can be automatically magnetized in the desired magnetization direction, and the productivity is remarkably improved. improves.
[0051]
In addition, for the same reason, defective products are rarely generated, and the defective rate is remarkably reduced when dealing with an urgent order or the like.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram showing an overview of the whole process in an example of a manufacturing method of the present invention, and (A) to (C) sequentially show the state of change of a key material and a magnet material.
FIG. 2 is a front view showing an outline of a magnetizing apparatus used for carrying out the present invention.
FIG. 3 is a side view thereof.
FIG. 4 is a block diagram showing a configuration of a control device.
FIG. 5 is a flowchart showing software of a personal computer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Key material 2 Recessed part 3 Magnet raw material 16 Magnetization means 30 Permanent magnet 5 Magnetization apparatus 51 Work stand 55 Magnetization yoke 6 Control apparatus

Claims (1)

A magnet material arranged in the length direction of the side edge of the key material is magnetized in the width direction of the key material according to the key signal, and the stem of the key material made of a non-magnetic metal material the side edge parts, and a work table for temporarily fixing a workpiece which is embedded a plurality of magnetic material along its length, one distribution for each side edge of the workpiece this is fixed to the work table A magnetizing yoke that is provided so as to be movable along its length in a state of facing the corresponding side edge, and a magnetizing current that instantaneously supplies a magnetizing current generated by discharging a capacitor to the magnetizing yoke. A magnetic table, a moving table for moving the magnetizing yoke along the length direction of the workpiece, a memory storing key signals for setting the presence / absence or magnetization direction of each magnet material of the workpiece, Reads the key signal corresponding to the workpiece fixed to the table, and magnetizes the yoke While moving to match the respective magnetic material, one direction toward the center of this set whether or magnetizing direction of magnetization in response to a key signal corresponding to the magnetic material from the side edges the outer surface of the key member A magnet key manufacturing apparatus, comprising: a control device that magnetizes only from a magnet.

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