JPH08142469A - Marking method and marking device - Google Patents

Abstract

PURPOSE: To realize the execution of high speed and clear marking at low cost under the clean state without the generation of dusts by a method wherein dented struck marks are formed by projecting a plurality of rigid wires of a marking head against an object by laterally feeding the marking head. CONSTITUTION: The marking head 2 of a marking device 1 fixed to a bracket 3, which is pivotally attached to a guide bar 4, can be moved within the horizontal width 6 in response to the rotating of a feed screw 5. Further, a motor 9 is connected through pulleys 7 and a timing belt 8 to the feed screw 5. By the way, when the starting of marking is commanded, the feed motor 9 is driven so as to detect the commanded position of the marking head 2 with a slit disc 11 and a photointerruptor 13 so as to apply voltage from a driver to the electromagnet of the marking head 2 in order to project wires with a shock. Thus, dented struck marks similar to the conical projected parts of the tips of tire wires are formed on an object for performing marking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dent type marking method and a marking device for marking a two-dimensional code or a character by providing a pyramidal or conical dent mark on an object to be marked. is there.

[0002]

2. Description of the Related Art Conventionally, when marking a two-dimensional code or a character mainly on an object other than printing paper, laser irradiation or cutting with a cutter such as an end mill is performed.

However, when laser irradiation is performed on an object containing iron, iron oxide is generated in powder form, and the marking content becomes unclear. In addition, marking speed is extremely slow in cutting with a cutter, and there is generation of cutting chips,
There is a problem that it cannot be applied to marking on an object such as a soft metal thin plate such as an IC lead frame or a printed circuit board that requires cleanliness.

[Problems to be Solved by the Invention]

The problem to be solved is that powder is generated when a two-dimensional code or a character is marked on an object such as an IC lead frame or the like that is required to be clean such as a soft metal thin plate or a printed circuit board. , Unclear marking,
The delay in marking speed is inevitable.

[0005]

In order to solve the above-mentioned problems, according to a marking method, a marking bed in which a plurality of hard wires each having a protrusion at the tip of a pyramid or a cone are installed in a vertical line It is possible to form a pyramid-shaped or conical-shaped concave dent on the object by laterally feeding the wire and projecting the wire toward the object at an appropriate time, and to mark a two-dimensional code or character composed of the concave dent. Characterize.

The marking method is characterized in that the number of times the wire is ejected is increased or decreased to make a dent.

In the marking device, a plurality of hard wires each having a pyramidal or conical tip at the tip are provided in a vertical line and a marking bed having a protruding element for each wire, and a transverse feed of the marking bed. It is characterized in that it comprises an element and a control unit capable of timely controlling the two-dimensional code and the character denting operation of the protruding element and the transverse feed element.

[0008]

According to the marking method of the present invention, the marking bed is laterally fed at a suitable time, and a plurality of vertical hard wires in the marking bed are projected toward the object at appropriate times to form a pyramidal shape on the object. Or, by forming a conical dent mark, a two-dimensional code or character consisting of this dent mark is marked, so it is possible to clearly mark at high speed and low cost in a clean state where no powder is generated. You can Moreover, since the recessed dents have a pyramidal shape or a conical shape, it is possible to mark a two-dimensional code or a character having excellent display capability due to the binarization relationship by the reflected light.

Further, in the marking method, since the number of times the hard wire is ejected is increased or decreased to make a dent,
It is possible to adjust the marking quality due to the dent marks depending on the material and surface condition of the object.

In the marking device of the present invention, a plurality of hard wires each having a pyramidal or conical tip at the tip are provided in a vertical line and a marking bed provided with a protruding element for each wire, and this marking bed. The bed traverse element, and the protruding element and the traverse element are composed of a control unit capable of timely controlling the two-dimensional code or the character denting operation, so that the dented dent is in the shape of a pyramid or a cone,
Due to the binarization due to reflected light, it is possible to clearly and cleanly mark a two-dimensional code or character with excellent display capability at high speed and at low cost.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 are views for explaining an embodiment of the present invention.

FIG. 1 is a schematic front view of the marking device 1, and FIG. 2 is a schematic side view of the marking device 1. The marking head 2 is fixed to a bracket 3, and the bracket 3 is pivotally attached to two guide bars 4 which are parallel to each other in the vertical direction.
Can be moved. A motor 9 is linked to the feed screw 5 via a pulley 7 and a timing belt 8 so that the marking bed 2 is laterally fed by receiving the driving force of the motor 9. Further, slit disks 10 and 11 are attached to the motor 9. In addition, 12, 13
Is a photo interrupter, and 14 is a signal line connector.

FIG. 3 is a schematic bottom view of the marking head 2, in which a plurality of hard wires 16 are pivotally supported in a vertical line in a wire guide 15 at the center. And
Each wire 16 is individually interlocked with an electromagnet (not shown) of a protruding element 17 built in the marking bed 2 and can be protruded from the wire guide 15. The tip of the wire 16 is a pyramidal or conical protrusion 16a. The ejection element 17 has a known mechanical structure capable of ejecting the wire 16.

FIG. 4 shows a control unit 18 provided in the marking device 1.
FIG. 4 is a block diagram of the configuration, in which a driver circuit 19 is connected to each wire 16 in the marking head 2 via a built-in electromagnet and a connector 14. The interface 20 has slit disks 10 and 11 and a photo interrupter 12,
The home position of six left and right movements generated from 13 and a timing signal for applying a voltage to the electromagnet built in the marking head 2 to eject the wire 16 are connected. And
Commands and timings for the motor 9 and the electromagnet are controlled by the CPU that stores commands corresponding to the two-dimensional code or character to be marked.

A description will be given of the marking method in the above-mentioned marking device capable of carrying out the marking method of the present invention. In the normal state, the marking head 2 is in the home position in the left and right positions by the signals from the slit disk 10 and the photo interrupter 12. Then, the feed motor 9 is driven through the interface 20 of the control unit 18 according to the marking command from the CPU, the command position of the marking head 2 is detected by the slit disk 11 and the photo interrupter 13, and the driver 19 marks the marking head 2 A voltage is applied to the applicable electromagnet built into the wire 16 and the wire 16 is impacted and ejected toward the surface of the target object 21. It is formed and marked.

FIGS. 5A to 5C show an example in which the object 21 is marked by the marking method of the present invention, and FIG. 5A shows the data expressed by the dot pattern arrangement of the dents 21a. In the example of the dimension array code, (B) is an image of character marking. (C) is a concave dent 21a similar to the pyramidal or conical protrusion 16a at the tip of the wire 16.
The cross section of FIG.

[0018]

【The invention's effect】

A. According to claim 1, the marking bed is laterally fed at a proper time, and a plurality of vertical hard wires in the marking bed are projected toward the object at appropriate times to form a pyramidal or conical dent mark on the object. By forming
Since the two-dimensional code or characters consisting of the dents and dents are marked, it is possible to clearly mark at high speed and low cost in a clean state where no powder is generated, and an IC lead frame or the like that requires cleanliness It is suitable for marking an object such as a soft metal thin plate or a printed circuit board. Moreover, since the dent dent has a pyramid shape or a cone shape,
It is possible to mark two-dimensional codes and characters with excellent display capability due to the binarization of reflected light. B. According to the second aspect, the marking quality can be adjusted by increasing or decreasing the number of times the wire is ejected according to the material and surface condition of the object. C. According to claim 3, a plurality of hard wires each having a pyramidal or conical tip at the tip are provided in a vertical row, and a marking bed having a protruding element for each wire, and a transverse feed element for the marking bed, Since the protrusion element and the lateral feed element are composed of a control unit capable of controlling the two-dimensional code and the character denting action at appropriate times, the dented dent is pyramidal or conical, and is displayed from the relation of binarization by reflected light. High-performance two-dimensional codes and characters can be clearly marked at high speed and at low cost.

[Brief description of drawings]

FIG. 1 is a schematic front view illustrating an example of a marking device according to the present invention.

FIG. 2 is a schematic side view.

FIG. 3A is a schematic bottom view of a marking head.
(B) is a partially enlarged bottom view of the wire group. FIG. 6C is a partially enlarged front view showing the protrusion of the wire.

FIG. 4 is a block configuration diagram of a control unit.

5A and 5B show an example of marking, FIG. 5A is a plan view of a two-dimensional array code example, FIG. 5B is an enlarged plan view of a character marking image, and FIG.

[Explanation of symbols]

1 Marking device 2 Marking head 3 Bracket 4 Guide bar 5 Feed screw 6 Left and right width 7 Pulley 8 Timing belt 9 Motor 10 Slit disk 11 Slit disk 12,13 Photo interrupter 14 Signal line 15 Wire guide 16 Wire 16a Wire protrusion 17 Ejection element 18 Control unit 19 Driver 20 Interface 21 Object 21a Dent impression of object

Claims (3)

[Claims] 1. A marking bed in which a plurality of hard wires each having a pyramidal or conical tip at a tip thereof are installed in a vertical row is fed laterally at appropriate times, and the wires are projected toward an object at appropriate times. A marking method, which comprises forming a pyramidal or conical dent indentation on an object and marking a two-dimensional code or a character consisting of the dent dent. 2. The marking method according to claim 1, wherein a dent is made by increasing or decreasing the number of times the wire is ejected. 3. A marking bed having a plurality of hard wires each having a pyramidal or conical tip at a tip thereof in a vertical row and having a protruding element for each of the hard wires, and a traverse element of the marking bed. A marking device, comprising: a control unit capable of timely controlling the protrusion element and the lateral feed element with respect to a two-dimensional code or a dent operation of a character.