JP6654120B2 - Dot marking device - Google Patents

Description

  The present invention relates to an apparatus for embossing a mark, and more particularly to an apparatus for marking a two-dimensional barcode or a character on a workpiece by dots.

  It is widely practiced to imprint a large number of dots on a workpiece that undergoes plastic deformation to represent marks such as characters and figures. The present applicant has disclosed a dot marking device using a numerically controlled machine tool (Patent Document 1).

  In a dot marking device, an element for embossing a workpiece is required to operate at a high speed, so that a so-called solenoid actuator in which a movable iron core is installed inside a solenoid is often used. In such a dot marking device, a pulse current is applied to a coil inside a solenoid to perform stamping while moving a stamping head incorporating a solenoid actuator.

  The size of the dot marking device varies from a large device using a numerically controlled machine tool as described in Patent Document 1 to a device that can be handled with one hand (Patent Document 2).

  The dot marking device often employs a mechanism for horizontally moving an embossing head along two linear axes on a limited plane, as described in Patent Documents 1 and 2 described above. However, a mechanism has been disclosed in which one linear axis is combined with one rotary axis employing an elbow arm to move the embossing head horizontally in one axial direction and rotationally in the other axial direction. (Patent Document 3).

JP 2007-229878 A JP 2012-148512 A JP-A-10-181293

  When trying to reduce the size of the dot marking device, a mechanism for horizontally moving the embossing head becomes a problem. In order to move the embossing head horizontally, not only a motor and a pulley, but also a linear guide rail or a similar element for connecting the embossing head and supporting the embossing head are required, which hinders miniaturization. There were challenges.

  Accordingly, it is an object of the present invention to provide a dot marking apparatus in which, when stamping a workpiece on an XY limited plane, the movement of a stamping head is based on rotation of two axes.

The dot marking device of the present invention achieves the above-mentioned object, and the means of claim 1 comprises a marking head having a marking means for stamping a workpiece, and a rod connected to the marking head. An X-axis arm into which the rod is inserted, an X-axis arm support shaft for supporting the X-axis arm, a Y-axis arm into which the rod is inserted in a space below the X-axis arm, and the Y-axis. A Y-axis arm support shaft for supporting the arm, an X-axis drive unit for swinging the X-axis arm around the Y-axis, and a Y-axis drive unit for swinging the Y-axis arm around the X-axis. , and a swinging means for swinging the rod in the X-axis, around the intersection of the central axis of the Y-axis and said rod.

A unit according to claim 2, wherein the dot marking apparatus, the rod, the X-axis, characterized in that it comprises the Y-axis and the spherical bearing for supporting around the intersection of the central axis of the rod.

  According to a third aspect of the present invention, the X-axis driving unit includes an X-axis motor and an X-axis driving belt, and the X-axis driving belt and the X-axis arm are connected by an X-axis belt clip. The X-axis arm has an X-axis U-shaped support at the tip end for supporting the X-axis belt clip, and the X-axis belt clip slides on the X-axis U-shaped support.

  According to a fourth aspect of the present invention, the Y-axis driving unit includes a Y-axis motor and a Y-axis driving belt, and the Y-axis driving belt and the Y-axis arm are connected by a Y-axis belt clip. The Y-axis arm has a Y-axis U-shaped support portion at the tip end for supporting the Y-axis belt clip, and the Y-axis belt clip slides on the Y-axis U-shaped support portion.

  According to the configuration of claim 1 or 2, the dot marking apparatus of the present invention has a swinging means, and has a size capable of grasping the frame, and a two-dimensional bar code or a two-dimensional bar code on the XY limited plane of the workpiece. There is an effect that it is possible to mark characters and the like with dots.

  According to the third or fourth aspect of the present invention, the dot marking apparatus of the present invention performs the engraving without distortion based on the embossing information on the premise that the engraving head is moved by rotation of two axes. There is an effect that can be.

FIG. 2 is a perspective view of the dot marking device of the present invention in Embodiment 1. 1 is a perspective view of a dot marking device according to a first embodiment of the present invention, excluding a frame. FIG. 5 is a perspective view for explaining the operation of the X-axis arm of the dot marking device of the present invention in Embodiment 1. FIG. 5 is a perspective view for explaining the operation of the Y-axis arm of the dot marking device of the present invention in Embodiment 1. FIG. 4 is a perspective view for explaining operations of an X-axis arm and a Y-axis arm of the dot marking device of the present invention in Embodiment 1. FIG. 2 is an enlarged view of an X-axis driving belt and an X-axis belt clip of the dot marking device of the present invention in Embodiment 1. FIG. 9 is an enlarged view of a Y-axis driving belt and a Y-axis belt clip of the dot marking device of the present invention in Embodiment 2. FIG. 13 is a perspective view for explaining the operation of an X-axis arm and a Y-axis arm of the dot marking device of the present invention in Embodiment 2.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of the dot marking device 1. A dot marking apparatus 1 includes a marking head 2 having marking means for stamping a workpiece, a rod 4 connected to the marking head 2, and a rod centered on an intersection of an X axis, a Y axis, and a central axis of the rod. Rocking means for rocking the. FIG. 1 does not show a part of the frame 5 to show the swinging means.

  The marking means is for stamping the workpiece with a marking pin 3 protruding from the tip of the marking head 2. The workpiece is preferably made of a plastically deformable material. Examples of the workpiece include metal and solid resin.

  Here, the embossing means is not limited, but the embossing means in this embodiment uses a solenoid. As an example of the stamping means other than the solenoid, there is an apparatus using compressed air. An engraving head 2 using a solenoid includes a coil, a plunger, and a spring, and an engraving pin 3 is connected to the plunger. The marking pin 3 is pushed out of the marking head 2 together with the plunger by the magnetic field generated by energizing the coil. When the energization of the coil is cut off, the plunger, which is also connected to the spring, is pulled back to the marking head 2 together with the marking pin 3 by the elasticity of the spring. When a pulsed current flows through the coil, the marking pin 3 repeats the expansion and contraction movement, and the stamped workpiece is plastically deformed. The dot marking apparatus 1 performs drawing while changing the position of the marking head 2, so that a dot-shaped dent locus can be drawn on a workpiece.

  The rod 4 is shaped like a shaft, has a central axis, and is connected to the engraving head 2. The dot marking device 1 swings the rod 4 by the swinging means, and moves the marking head 2 connected to the rod 4 to a desired stamping position.

  The oscillating means includes an X-axis arm 6 into which the rod 4 is inserted, an X-axis arm support shaft 7 that supports the X-axis arm 6, and a Y-axis into which the rod 4 is inserted in a gap below the X-axis arm 6. An arm 8, a Y-axis arm support shaft 9 for supporting the Y-axis arm 8, an X-axis drive means for swinging the X-axis arm 6 around the Y-axis, and a Y-axis arm 8 around the X-axis. It comprises a Y-axis driving means for swinging, and a spherical bearing 10 for supporting the rod 4 about the intersection of the X-axis, Y-axis and the central axis of the rod 4.

  FIG. 2 is a perspective view of the dot marking device 1 excluding the frame 5, and is a perspective view showing an X-axis driving unit and a Y-axis driving unit. The shape of the X-axis arm 6 oscillated by the X-axis driving means is U-shaped, and the inside of the bottom of the U-shape is arc-shaped. Similarly, the shape of the Y-axis arm 8 oscillated by the Y-axis driving means is U-shaped, and the opposing surface of the X-axis arm 6 at the U-shaped bottom has an arc shape. The X-axis arm 6 and the Y-axis arm 8 can swing independently without interfering with each other because the bottom of the U-shape is arc-shaped.

  FIGS. 3 to 5 are perspective views for explaining the operation of the X-axis arm 6 and the Y-axis arm 8 of the dot marking device 1. FIG. 3 is a perspective view showing the swing of the X-axis arm 6, and FIG. 4 is a perspective view showing the swing of the Y-axis arm 8. FIG. 5 is a perspective view showing the swing of the X-axis arm 6 and the Y-axis arm 8 in combination. An X-axis swing slot 11 is provided at the center of the U-shape of the X-axis arm 6. Similarly, a Y-axis swing slot 12 is provided at the center of the U-shape of the Y-axis arm 8. The rod 4 is inserted into the X-axis swing slot 11 and the Y-axis swing slot 12. When the X-axis arm 6 moves about the X-axis arm support shaft 7, the X-axis swing slot 11 moves the rod 4 in the Y-axis direction, and the Y-axis arm 8 moves about the Y-axis arm support shaft 9. At this time, the Y-axis swing slot 12 moves the rod 4 in the X-axis direction. Since the marking head 2 moves together with the rod 4, the marking head 2 is moved to a desired stamping position by the X-axis driving means and the Y-axis driving means.

  Here, the X-axis driving unit is not limited, but the X-axis driving unit in the present embodiment includes an X-axis motor 13 and an X-axis driving belt 14, and the X-axis driving belt 14 Connected to X-axis arm 6. Similarly, the Y-axis driving unit is not limited, but the Y-axis driving unit in this embodiment includes a Y-axis motor 15 and a Y-axis driving belt 16, and the Y-axis driving belt 16 Connected to Y-axis arm 8.

  Note that the X-axis drive belt 14 and the Y-axis drive belt 16 may be members that can transmit the rotation of the X-axis motor 13 and the Y-axis motor 15, and are not belt-shaped members as illustrated. Is also good. As an example, a string-like member such as a wire is cited. By using a stainless wire, advantages such as space saving and high rigidity can be obtained.

  The X-axis driving belt 14 and the X-axis arm 6 are connected by an X-axis belt clip 17, and the Y-axis driving belt 16 and the Y-axis arm 8 are connected by a Y-axis belt clip 18.

  The X-axis drive belt 14 is attached to an X-axis belt roller 19 that is directly connected to the X-axis motor 13 and a freely rotating X-axis belt idler roller 20. The X-axis drive belt 14 moves in parallel with the X-axis to swing the X-axis arm 6. Similarly, the Y-axis driving belt 16 is attached to a Y-axis belt roller 21 directly connected to the Y-axis motor 15 and a freely rotating Y-axis belt idler roller 22. The Y-axis drive belt 16 moves in parallel with the Y-axis to swing the Y-axis arm 8.

  The central axes of the X-axis arm support shaft 7 and the Y-axis arm support shaft 9 intersect. Further, the X-axis arm support shaft 7, the Y-axis arm support shaft 9 and the rod 4 have their respective central axes crossing each other at one point. The crossing point is the center point of the spherical bearing 10. The spherical bearing 10 is disposed on a plane where the X-axis arm support shaft 7 and the Y-axis arm support shaft 9 are orthogonal to each other, and the rod 4 is inserted as a shaft, thereby enabling the rod 4 to swing around a spherical center.

  With the above-described configuration, the dot marking device 1 has a swinging unit, and has a size capable of grasping the frame 5, and a two-dimensional barcode or a character is formed by dots on the XY limited plane of the workpiece. There is an effect that enables marking.

  The dot marking device 1 includes an embossing information storage unit that stores embossing information that is an embossing position of the embossing pin 3 on a workpiece. The embossing information input from the outside is stored in the embossing information storage means. The dot marking device 1 moves the engraving head 2 to the embossing position determined by the embossing information, based on the embossing information retrieved one by one from the embossing information storage means.

  Since the tip of the marking pin 3 follows the swing of the rod 4 about the center point of the spherical bearing 10, the locus of the tip of the marking pin 3 is on a curved surface. However, normally, it is assumed that the embossed surface of the workpiece is a plane, and the embossed information is created based on the plane.

Here, a case is considered in which the X-axis arm 6 is swung in order to move the marking head 2 to the marking position in the X-axis direction based on the marking information. Hereinafter, the central axis of the rod 4 and embossing initial position x ₀ of the embossing position when both the also vertical X axis and Y axis. At this time, it is assumed that the marking pin 3 is perpendicular to the workpiece.

In this case, the embossing position of the workpiece x, the center point of the spherical bearing 10 O, distance r _a from O when embossing the initial position x ₀ to the X-axis belt clip _17, the embossing initial position x ₀ when O a distance to x ₀ and r _x from the time, a is the distance to move the X-axis belt clip 17 may be calculated by multiplying the ratio of r _a and r _x to x.

  The X-axis motor 13 of the dot marking device 1 moves the X-axis belt clip 17 by the value of a calculated from the value of x based on the embossing information. The marking pin 3 of the marking head 2 moved by the X-axis motor 13 marks the position x of the workpiece to be stamped.

  In order to move the marking head 2 to the next embossing position x 'after x, a may be calculated relative to the difference between x' and x. Also, when the marking head 2 is moved to the stamping position in the Y-axis direction based on the stamping information, the distance to move the Y-axis belt clip 18 under the control of the Y-axis motor 15 is calculated by the same calculation.

  The present invention is required to be able to control the accurate positioning of the embossing means. Even when the X-axis motor 13 and the Y-axis motor 15 are open-loop stepping motors, accurate positioning of the embossing means is possible by pulse control, but mechanical factors such as angular displacement May cause a shift. An example of a more accurate positioning means is to use a servomotor having a rotation detector. By feeding back the position information detected by the rotation detector, it is possible to adjust the deviation of the embossing position. Further, a device capable of detecting a position such as an analog linear sensor may be combined with the stepping motor, which has the same effect as that of the servomotor, and further facilitates absolute positioning control such as returning the rod 4 to the origin.

  FIG. 6 is an enlarged view of the X-axis drive belt 14 and the X-axis belt clip 17. The X-axis arm 6 has an X-axis U-shaped support portion 23 that supports the X-axis belt clip 17 at the tip, and the X-axis belt clip 17 slides on the X-axis U-shaped support portion 23.

  While the X-axis arm 6 performs an arc-shaped swinging motion, the X-axis belt clip 17 performs a linear motion parallel to the embossing surface. By providing the X-axis arm 6 with the X-axis U-shaped support portion 23, even if the swing angle of the X-axis arm 6 becomes large, the X-axis belt clip 17 and the X-axis U-shaped support portion 23 slide to establish a connected state. Can be kept. The X-axis belt clip 17 converts the winding motion of the X-axis drive belt 14 into a linear motion, and transmits only the driving force to the X-axis arm 6. At this time, the X-axis drive belt 14 that moves in parallel with the embossing surface has an effect of canceling the curved surface locus of the tip of the embossing pin 3.

  4 and 5, unlike the X-axis belt clip 17, the Y-axis belt clip 18 of the Y-axis arm 8 is a fixed type that does not slide, and the Y-axis arm 8 is not provided with a U-shaped support. The X-axis belt clip 17 and the Y-axis belt clip 18 may be slidable or fixed. When the swing angle of the X-axis arm 6 and the Y-axis arm 8 is small, the force of the fixed type belt clip moving in the vertical direction is absorbed by the tension of the X-axis drive belt 14 or the Y-axis drive belt 16. Since the Y-axis belt clip 18 is fixed, no problem occurs.

  It should be noted that, as the embossing position becomes farther from the embossing initial position, the embossing mark formed by the embossing pin 3 becomes steeper and shallower. do not become. The maximum allowable value of θ, in other words, the limit value of the inclination of the rod 4 should be controlled by the X-axis driving means and the Y-axis driving means. There is also a limit depending on the shape of each part of the apparatus including the apparatus 12. The limit value of θ is preferably 12 degrees or less in angle, and more preferably 8 degrees or less when the X-axis belt clip 17 or the Y-axis belt clip 18 is a fixed type.

  Although not shown in the present embodiment, it is preferable that the dot marking device 1 be provided with legs on the frame 5. By making the tip of the leg portion flat and in contact with the workpiece, the grasped dot marking device 1 is stabilized, and a more accurate trajectory can be drawn. Further, the use of the dot marking device 1 is not limited to a form in which the frame 5 is directly grasped. As an example, there is a form in which a grip is connected to the frame 5 and the grip is grasped.

  Similarly, although not shown in the present embodiment, the dot marking device 1 may be equipped with a small battery and used as a power source. By using a small battery as a power source, the power supply cord does not become a hindrance, and the advantages of the miniaturized dot marking device 1 can be maximized.

  FIG. 7 is an enlarged view of the Y-axis driving belt 16 and the Y-axis belt clip 24 in the present embodiment. In the dot marking device 1 of the present embodiment, the Y-axis driving belt 16 and the Y-axis arm 8 are connected by a Y-axis belt clip 24. The Y-axis arm 8 includes a Y-axis U-shaped support portion 25 that supports the Y-axis belt clip 24 at the end, and the Y-axis belt clip 24 slides on the Y-axis U-shaped support portion 25. Other configurations are the same as those of the first embodiment.

  FIG. 8 is a perspective view for explaining the operation of the X-axis arm 6 and the Y-axis arm 8 in the present embodiment, and shows the swing of the X-axis arm 6 and the Y-axis arm 8 in combination. The functions of the Y-axis belt clip 24 and the Y-axis U-shaped support 25 in the present embodiment are the same as those of the X-axis belt clip 17 and the X-axis U-shaped support 23 in the first embodiment. Specifically, since the Y-axis arm 8 includes the Y-axis U-shaped support 25, the Y-axis belt clip 24 and the Y-axis U-shaped support 25 slide even when the swing angle of the Y-axis arm 8 increases. The connection state can be maintained. The Y-axis belt clip 24 converts the winding motion of the Y-axis drive belt 16 into a linear motion, and transmits only the driving force to the Y-axis arm 8. At this time, the Y-axis driving belt 16 that moves in parallel to the embossing surface has an effect of canceling the curved surface locus of the tip of the embossing pin 3.

  According to the configuration of the first embodiment or the second embodiment, the dot marking device 1 performs the engraving without distortion based on the embossing information on the premise that the engraving head 2 is moved by the rotation of two axes, based on the premise of the plane. There is an effect that can be.

1. Dot marking device.
2 ... engraved head, 3 ... engraved pin, 4 ... rod, 5 ... frame, 6 ... X-axis arm, 7 ... X-axis arm support shaft, 8 ... Y-axis arm, 9 ... Y-axis arm support shaft, 10 ... spherical bearing , 11: X-axis swing slot, 12: Y-axis swing slot, 13: X-axis motor, 14: X-axis drive belt, 15: Y-axis motor, 16: Y-axis drive belt, 17: X-axis belt clip , 18: Y-axis belt clip, 19: roller for X-axis belt, 20: idler roller for X-axis belt, 21: roller for Y-axis belt, 22: idler roller for Y-axis belt, 23: X-axis U-shaped support, 24: Y-axis belt clip; 25: Y-axis U-shaped support.

Claims (4)

An engraving head including engraving means for engraving a workpiece;
A rod connected to the engraving head;
An X-axis arm into which the rod is inserted,
An X-axis arm support shaft for supporting the X-axis arm;
A Y-axis arm into which the rod is inserted in a gap below the X-axis arm;
A Y-axis arm support shaft for supporting the Y-axis arm;
X-axis driving means for swinging the X-axis arm around the Y-axis,
Y-axis driving means for swinging the Y-axis arm around the X-axis,
The X-axis, the dot marking apparatus and a swinging means for swinging the rod around the intersection of the central axis of the Y-axis and said rod. Said rod, said X-axis, the Y axis and the dot marking apparatus according to claim 1, characterized in that it comprises a spherical bearing for supporting around the intersection of the central axis of the rod. The X-axis driving unit includes an X-axis motor and an X-axis driving belt,
The X-axis drive belt and the X-axis arm are connected by an X-axis belt clip,
3. The X-axis arm according to claim 2, further comprising: an X-axis U-shaped support portion that supports the X-axis belt clip at a distal end, wherein the X-axis belt clip slides on the X-axis U-shaped support portion. 4. Dot marking equipment. The Y-axis driving means includes a Y-axis motor and a Y-axis driving belt,
The Y-axis driving belt and the Y-axis arm are connected by a Y-axis belt clip,
The said Y-axis arm is provided with the Y-axis U-shaped support part which supports the said Y-axis belt clip at the front-end | tip, The said Y-axis belt clip slides the Y-axis U-shaped support part. 3. A dot marking device according to claim 1.

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