JP4191304B2 - Chip holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tip holder that rotatably holds a scribing cutter wheel tip.
[0002]
[Prior art]
FIG. 1 shows a conventional glass scriber having a general mechanism. The table 1 moves in the direction perpendicular to the paper surface (Y direction) along the two rows of rails 3 and 4 by the axial rotation of the ball screw 2 inserted therethrough. A glass plate 5 is sucked and fixed on the upper surface of the table 1 by vacuum suction. By recognizing the alignment mark written on the glass plate 5 with the pair of CCD cameras 6, a deviation from a fixed position when the glass plate 5 is set is detected. For example, when the glass plate 5 is shifted by an angle θ, the table 1 is rotated by −θ, and when the glass plate 5 is shifted by Y, the table 1 is moved by −Y. Above the table 1, a guide bar 7 extends in the X direction, and a scribe head 8 reciprocates along the guide bar 7 by a cutter shaft motor 9. A chip holder 10 is provided below the scribe head 8 so as to be movable up and down and swingable. A cutter wheel chip 11 is rotatably mounted on the lower end of the chip holder 10.
[0003]
The chip holder 10 is lowered, and the scribe head 8 is moved in a state where the cutter wheel chip 11 is pressed against the surface of the glass plate 5 with a predetermined pressure (this force is called a scribe load). Each time the table 1 is moved in the Y direction, the scribe operation is repeated, so that the scribe lines in the X direction are successively engraved. Next, the table 1 is turned 90 ° by a drive source (not shown), and then a similar scribe operation is performed to thereby engrave a scribe line in the Y direction.
[0004]
An enlarged view of the tip holder 10 is shown in FIG. At the time of scribing, the scribing head 8 moves in the right direction in the figure, and a nozzle 15 is provided on the rear side of the scribing head 8. Is blown away.
[0005]
[Problems to be solved by the invention]
However, the blown-off swarf stays in the chip holder 10 and slips by preventing the cutter wheel chip 11 from rotating, causing a scribe failure. In addition, as shown in FIG. 3, an apparatus that scribes the lower surface of the glass plate 5 can be seen, and in this case, the chip tends to accumulate especially in the chip holder 10 and wear progresses.
[0006]
The present invention has been made in order to solve the above-described problems, and provides a chip holder that can effectively blow off chips by setting a location where compressed air is blown to an appropriate position. Objective.
[0007]
[Means for Solving the Problems]
The tip holder is made of a “U” -shaped member as viewed from the front, and is held so that the concave portion faces downward, and the cutter wheel tip is rotatably held in the concave portion. Therefore, if compressed air is blown downward (that is, toward the cutter wheel chip) from the portion that hits the ceiling of the concave portion, the chips generated by the scribe are blown out to the outside without staying in the concave portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 4 is a cross-sectional view showing an embodiment of a chip holder 51 and a scribe head 52 for holding the chip holder 51 according to the present invention, and elements corresponding to those in FIG. The vertical support shaft 53 provided in the chip holder 51 is inserted into the inner peripheral body of the vertical bearing bearing 55 provided in the concave portion 54 a of the holder holding portion 54, thereby moving the scribe head 52. With the movement in the right direction in FIG. 4, the tip holder 51 swings its head so as to follow the movement direction.
[0009]
The holder holding portion 54 is located immediately below the scribe unit 56 with a slight gap G therebetween. A bearing 57 is embedded in a predetermined portion on the right side of the holder holding portion 54 in a direction orthogonal to the paper surface, and the center shaft 57a of the bearing 57 is fixed to the scribe unit 56 side. On the other hand, the lower left end portion of the holder holding portion 54 is locked by a stopper S. Accordingly, the holder holding portion 54 can perform an elevation operation as indicated by the arrow A with the bearing 57 as a fulcrum within the range of the gap G shown in the drawing, and the cutter wheel tip 11 also moves up and down accordingly.
[0010]
An air cylinder chamber 58 extending in the vertical direction is formed in the scribe unit 56, and a piston 59 is fitted in the air cylinder chamber 58, and a bearing 60 is fitted in a recess formed in the lower end portion of the piston 59. The inner shaft 60 a is supported by the piston 59. Therefore, the outer peripheral body of the bearing 60 rotates freely, and the lower end thereof is in contact with the holder holding portion 54 from above. Here, by passing a predetermined pressure of air through the air cylinder chamber 58, the piston 59 is pushed down together with the bearing 60, and a predetermined scribe pressure (scribe load) is applied to the cutter wheel chip 11. The bearing 60 is for constantly transmitting the pressing force from the piston 59 to the holder holding portion 54 even in a situation where the holder holding portion 54 is inclined.
[0011]
Now, a single air blowing hole 61 is formed in the chip holder 51 and its support shaft 53, and the upper end thereof opens into the above-described recess 54a. The air blowing hole 61 has a diameter of 2 to 2.5 mm. The recess 54a itself opens to the outside through the vent hole 54b. Then, a flat washer-like seal 62 is attached so as to close the upper end of the bearing 55. Such a structure is commercially available as a single seal type bearing.
[0012]
FIG. 5 is an enlarged view of the chip holder 51, and FIG. 6 is a front view of FIG. In both figures, only the bearing bearing 55 is shown in a sectional view. As shown in FIG. 6, the tip holder 51 has a “U” shape, and the cutter wheel tip 11 is rotatably mounted in a concave portion 65 (referred to as a slot). The lower end of the air blowing hole 61 is open to the slit groove 65.
[0013]
Therefore, if compressed air is supplied from the vent hole 54b of FIG. 4 to the recess 54a of the holder holding portion 54, the compressed air is blown from above the cutter wheel chip 11 through the air blowing hole 61. The chips generated at the time of scribing are conveniently blown outside without adhering to the slot 65 and the cutter wheel chip 11. The compressed air pressure is suitably 1 to 1.5 kg / cm2. Nitrogen may be blown in addition to air, and when ionized air is blown, generation of static electricity is prevented and the chips are completely blown away.
[0014]
【The invention's effect】
As described above, according to the present invention, an air blowing hole having an opening in the recess of the chip holder is formed in the chip holder, and compressed air is blown to the recess through the air blowing hole. Since the swarf is blown to the outside without staying in the concave portion, wear of the cutter wheel tip and the tip holder itself can be prevented, and good scribing can be performed without slipping of the cutter wheel.
[Brief description of the drawings]
FIG. 1 is a front view of a conventional glass scriber. FIG. 2 is a detailed view of a scribe head in FIG. 1. FIG. 3 is a diagram showing an example of scribing on the lower surface of a workpiece. Sectional view of the scribing head 52 holding the chip holder [FIG. 5] Enlarged view of the chip holder of FIG. 4 [FIG. 6] Front view of the chip holder of FIG.
11 Cutter wheel tip 51 Tip holder 52 Scribe head 53 Support shaft 54 Holder holding portion 54b Vent hole 55 Bearing bearing 56 Scribe unit 57 Bearing 58 Air cylinder chamber 59 Piston 60 Bearing 61 Through hole 62 Seal 65 Slot

Claims (1)

Consists member-shaped "U", in the chip holder for rotatably holding the cutter wheel tip in its recess, Chi lifting an opening in a location which corresponds to the ceiling when holding to face the concave portion downwards, said A chip holder, wherein an air blowing hole for blowing air toward the cutter wheel chip mounted downward from the opening is formed in the holder.

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