CN112008890A - Holder unit and pin - Google Patents
Holder unit and pin Download PDFInfo
- Publication number
- CN112008890A CN112008890A CN202010345297.0A CN202010345297A CN112008890A CN 112008890 A CN112008890 A CN 112008890A CN 202010345297 A CN202010345297 A CN 202010345297A CN 112008890 A CN112008890 A CN 112008890A
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- pin
- scribing wheel
- holder unit
- scribing
- holder
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- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 29
- 239000000463 material Substances 0.000 description 27
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000006073 displacement reaction Methods 0.000 description 13
- 230000001105 regulatory effect Effects 0.000 description 11
- 239000011521 glass Substances 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000010432 diamond Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
- B28D1/225—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising for scoring or breaking, e.g. tiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
Abstract
The invention discloses a holder unit and a pin, and provides a holder unit capable of easily forming a scribing line along a scanning direction of the holder unit. In the holder unit (40), a pin (70) supporting a scribing wheel (60) is provided with a limiting part (80), the limiting part (80) prevents the scribing wheel (60) from moving relative to the pin (70) in the axial direction of the pin (70), and the limited part of the scribing wheel (60) contacts the limiting part (80) of the pin (70) at two points to support the scribing wheel (60), thereby inhibiting the deviation of the scribing wheel.
Description
Technical Field
The invention relates to a holder unit and a pin.
Background
The scribing device is used for forming scribing lines on brittle material substrates such as glass substrates. The scribing apparatus is provided with a holder unit and a scanning device for scanning the holder unit. The holder unit is composed of a holder body, a pin, and a scribing wheel. The holder body is mounted on the scanning device. The pin is supported by the holder body. The scribing wheel is supported by a pin. Patent document 1 discloses a scribe unit (20) as an example of a holder unit. The scribing unit (20) is composed of a scribing wheel (60), a pin (32) for rotatably supporting the scribing wheel (60), and a supporting frame (33) for supporting the pin (32). A scribing unit (20) scans the brittle material substrate in a predetermined scanning direction, thereby forming a scribing line on the brittle material substrate.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2012 and 106479
In a conventional scribing apparatus, for example, when a holder unit scans in a linear direction, a nonlinear scribing line may be formed on a brittle material substrate. In one example, the nonlinear scribe line includes a linear portion along a scanning direction of the scribe wheel and a nonlinear portion traveling in a direction different from the scanning direction. When the nonlinear portion is partially formed at one or more positions of the scribe line, the shape of the nonlinear scribe line may be varied in some cases, such as when the linear portion and the nonlinear portion are alternately formed almost entirely on the scribe line. From the viewpoint of improving the quality of the broken brittle material substrate, it is preferable to form a scribe line along the scanning direction. The same applies not only to the case of forming a straight scribe line but also to the case of forming a scribe line having a shape different from a straight line.
Disclosure of Invention
(1) The holder unit according to the present invention includes: a scribing wheel; a pin inserted into the insertion hole of the scribing wheel and rotatably supporting the scribing wheel; and a holder that holds the pin, wherein the scribing wheel is supported by a restricted portion provided on an inner peripheral surface of the insertion hole and a restricting portion provided on the pin in two-point contact.
When a reaction force acting in the axial direction of the pin is generated in the scribing wheel during scanning by the scribing wheel, the reaction force is received by the restricting portion of the pin. Therefore, the movement of the scribing wheel relative to the pin in the axial direction of the pin can be restrained. This makes it possible to easily form a scribe line along the scanning direction of the holder unit. Further, since the regulating portion of the pin is in contact with the regulated portion of the scribing wheel at two points, the position and posture of the scribing wheel are easily stabilized in the holder.
(2) In a preferred example, in the holder unit described in (1), the regulating portion is a concave portion formed on an outer periphery of the pin, and the regulated portion is a convex curved surface.
Therefore, the structure of the restricting portion is simple.
(3) In a preferred example, in the holder unit described in (2), a width of the concave portion is smaller than a thickness of the scribing wheel.
Therefore, the restricted portion and the restricting portion reliably contact at two points.
(4) In a preferred example, in the holder unit described in (2), the convex curved surface is provided over the entire thickness direction of the scribing wheel.
Since the concave portion and the convex portion are in line contact, the frictional resistance at the time of scribing is reduced.
(5) The pin according to the present invention is inserted into an insertion hole of a scribing wheel and rotatably supports the scribing wheel, and is characterized in that,
the pin is provided with a restricting portion that contacts the insertion hole of the scribing wheel at two points.
According to the pin, the same effects as those described in (1) can be obtained.
According to the holder unit and the pin of the present invention, the scribe line along the scanning direction of the holder unit can be easily formed.
Drawings
Fig. 1 is a perspective view of a scribing device according to an embodiment.
Fig. 2 is a sectional view of the holder unit of fig. 1.
Fig. 3 is a diagram showing variations in scribe lines when scribing is performed using the holder unit of the embodiment.
Fig. 4 is a diagram showing variations in scribe lines when scribing is performed using a conventional holder unit.
Fig. 5 is an enlarged side view showing a modification of the regulating portion of the holder unit according to the embodiment.
Description of the symbols
1 … scoring device; 40 … holder unit; 60 … marking wheels; 70 … pin; 80 … restriction; 81 … recess; 90 … restricted portion; 91 … convex part.
Detailed Description
(embodiment mode)
The scribing apparatus 1 shown in fig. 1 is used to form a scribing line on a surface of a brittle material substrate GB to break a substrate made of a brittle material such as a glass substrate or a ceramic substrate (hereinafter referred to as "brittle material substrate GB"). An example of the brittle material substrate GB is a glass substrate. An example of the glass substrate is alkali-free glass. Alkali-free glasses are used for flat panel displays and the like.
The main elements constituting the scribing apparatus 1 are a moving device 10, a table device 20, a holding mechanism 30, and a holder unit 40. The moving device 10 scans the brittle material substrate GB in the scanning direction. The mobile device 10 includes a mobile station 11 on which a table device 20 is mounted. The mobile station 11 is mounted on a pair of guide rails 12. The rotational-to-linear conversion device 13 moves the moving stage 11 along the guide rail 12. An example of the rotational/linear motion converter 13 is a feed screw device including a motor 13A as a drive source and a feed screw unit 13B connected to an output shaft of the motor 13A.
The table device 20 includes a table 21 rotatable about a rotation center axis J and a motor 22 for rotating the table 21. The brittle material substrate GB is placed on the table 21, and is held on the table 21 by being sucked onto the table 21 by a vacuum suction means (not shown). The motor 22 is housed in the table 21. The motor 22 rotates the table 21 to determine the position of the brittle material substrate GB in the rotation direction of the table 21.
The holder unit 40 is held by the holding mechanism 30. The holding mechanism 30 includes a bridge 31 provided so as to straddle the table 21 from above, and a pair of support columns 32 for supporting the bridge 31. A guide 31A is provided on the bridge 31. The scribing head 34 is movably attached to the guide 31A via the connecting portion 33 so that the scribing head 34 can move. The coupling portion 33 and the scribing head 34 move along the guide 31A. The connecting portion 33 and the scribing head 34 are connected via an elevating mechanism (not shown). The lifting mechanism is driven to move the scribing head 34 up and down relative to the connecting portion 33. A holder unit 40 is detachably attached to the scribe head 34 via a holder joint 35.
The main elements constituting the holder unit 40 shown in fig. 2 are the holder 50, the scribing wheel 60, and a pin 70 (hereinafter referred to as "pin 70") of the scribing wheel 60. Since the scribing wheel 60 is a consumable, it is replaced periodically. In one example, the scribing wheel 60 is replaced by replacing only the scribing wheel 60 or replacing the holder unit 40.
An example of a material constituting the holder 50 is a magnetic metal. The holder 50 has a substantially cylindrical shape or a prismatic shape. The holder 50 includes a groove 51 for receiving a part of the scribing wheel 60, and a support hole 52 penetrating the holder 50 to communicate with the groove 51. The groove 51 opens toward the brittle material substrate GB in a state where the holder 50 is attached to the scribe head 34 (see fig. 1).
The pin 70 supports the scribing wheel 60. The pin 70 is inserted into the support hole 52. One end 70A of the pin 70 has a tapered shape. The relationship of the bearing hole 52 to the pin 70 may be arbitrarily selected. In the first example, the pin 70 is fixed to the support hole 52 so as not to rotate relative to the support hole 52. The fixing method is pressing or bonding. In the first example, the maximum inner diameter of the support hole 52 is preferably substantially equal to the maximum outer diameter of the pin 70. In the second example, the pin 70 is inserted into the support hole 52 so as to be rotatable with respect to the support hole 52. In the case of the second example, the maximum inner diameter of the support hole 52 is slightly larger than the maximum outer diameter of the pin 70. Hereinafter, the direction in which the center axis of the pin 70 extends is referred to as the pin axial direction.
Examples of the material constituting the scribing wheel 60 and the pin 70 are sintered diamond, cemented carbide, single crystal diamond, and polycrystalline diamond. In other examples, there may be cases where the scribing wheel 60 is coated with a hard material. The hard material is, for example, diamond.
The scribing wheel 60 is mainly divided into a body portion 61 and a tip portion 62. The main body 61 is in the form of a disc, and is a portion of the scribing wheel 60 that is radially inward of the cutting edge portion 62. The cutting edge portion 62 has a V-shaped cross section and is formed over the entire periphery of the outer peripheral portion of the scribing wheel 60. The V-shaped cross section is a shape that is tapered toward the tip of the outer peripheral edge of the scribing wheel 60 in the cross section of the scribing wheel 60 cut by a plane along the thickness direction of the scribing wheel 60 (hereinafter referred to as "thickness direction DT"). In the following description, a cross section orthogonal to a plane parallel to the radial direction of the scribing wheel 60 is referred to as an orthogonal cross section. In a preferred example, an example of the outer diameter of the scribing wheel 60 is included in
Within the range of (1). In one example, the scribing wheel 60 has an outer diameter of
In a preferred example, the thickness of the scribing wheel 60 is included in the range of 0.38mm to 1.1 mm. An example of the thickness of the scribing wheel 60 is 0.64 mm. An example of the length of the groove 51 in the thickness direction DT, that is, the distance between the two surfaces 51A and 51B opposed to each other in the thickness direction DT among the inner surfaces of the groove 51 in the thickness direction DT is 0.66 mm.
An insertion hole 63 penetrating the body 61 in the thickness direction DT is formed in the center of the body 61. A pin 70 is inserted into the insertion hole 63. The main body 61 includes a first side surface 61A on which one end of the insertion hole 63 is formed, and a second side surface 61B on which the other end of the insertion hole 63 is formed. The first side surface 61A faces the surface 51A of the groove 51 with a predetermined gap SA therebetween at a portion accommodated in the groove 51. The second side surface 61B faces the surface 51B of the groove 51 with a predetermined gap SB therebetween in a portion accommodated in the groove 51. The relationship between the size of the gap SA and the size of the gap SB in the thickness direction DT can be arbitrarily selected according to the position and size of the regulating portion 80 described later. In the first example shown in fig. 2, the size of the gap SA in the thickness direction DT is equal to the size of the gap SB. In the second example, the size of the gap SA in the thickness direction DT is different from the size of the gap SB.
The size of the gaps SA and SB in the thickness direction DT can be set arbitrarily. In a preferred example, the size of the gaps SA and SB in the thickness direction DT is determined based on the relationship between how easily the scribing wheel 60 is prevented from tilting in the thickness direction DT in the groove portion 51 of the holder 50 and how hard foreign matter blocks the gaps SA and SB. An example of the foreign matter is glass chips of the brittle material substrate GB generated by forming scribe lines. An example of the maximum values of the sizes of the gaps SA and SB in the thickness direction DT is 10 μm. When the size of the gaps SA and SB is 10 μm or less, the scribing wheel 60 is easily prevented from being inclined in the thickness direction DT in the groove portion 51 of the holder 50. An example of the minimum values of the sizes of the gaps SA and SB in the thickness direction DT is 2 μm. When the size of the gaps SA and SB is 2 μm or more, foreign matters hardly block the gaps SA and SB. Further, the scribing wheel 60 and the holder 50 are less likely to interfere with each other. An example of a desirable range of the total size of the gaps SA and SB in the thickness direction DT is 4 μm to 20 μm.
In the step of forming the scribe line on the brittle material substrate GB, the holder unit 40 scans in a predetermined scanning direction while the scribing wheel 60 is pressed against the surface of the brittle material substrate GB. Examples of the scanning method include a method of moving the holder unit 40 relative to the brittle material substrate GB, a method of moving the brittle material substrate GB relative to the holder unit 40, and a method of combining these methods. When scribing the brittle material substrate GB, not only a first reaction force including a component acting in a direction opposite to the scanning direction but also a second reaction force including a component in the pin axis direction acts on the scribing wheel 60. This is mainly caused by the unevenness of the surface properties of the brittle material substrate GB. The surface shape unevenness is generated by, for example, a plurality of minute irregularities unevenly distributed on the surface, and surface deflection. The second reaction force includes a reaction force acting in a first pin axial direction, which is one of the pin axial directions, and a reaction force acting in a second pin axial direction, which is the other of the pin axial directions. Since the shape of the unevenness on the surface of the brittle material substrate GB differs at each location, the direction and intensity of the second reaction force acting on the scribing wheel 60 change as the scribing wheel 60 travels. Since the scribing wheel 60 is not fixed with respect to the pin 70, the scribing wheel 60 is displaced in the pin axial direction with respect to the pin 70 as the second reaction force acts on the scribing wheel 60. In the following description, the movement of the scribing wheel 60 in the pin axial direction with respect to the pin 70 is referred to as "wheel axial displacement".
The direction and amount of displacement in the wheel axial direction mainly depend on the relationship between the strength of the second reaction force acting in the first pin axial direction and the strength of the second reaction force acting in the second pin axial direction. Due to the generation of the wheel axial displacement, a non-linear scribing line is formed. By suppressing this displacement, it becomes difficult to form a non-linear scribe line. The holder unit 40 has a displacement suppression structure for suppressing the displacement in the wheel axial direction. The displacement suppressing structure includes a restricting portion 80 provided on the pin 70, and a restricted portion 90 provided on the scribing wheel 60.
The configuration of the restricting portion 80 can be arbitrarily selected. In the example shown in fig. 2, the restricting portion 80 includes a recessed portion 81 formed on the outer periphery of the pin 70. Therefore, the structure of the restricting portion 80 is simple. The concave portion 81 is a portion that can be brought into contact with the restricted portion 90 at two points by, for example, applying grinding, electric discharge machining, laser machining, or the like to the outer peripheral portion of the pin 70, and does not include minute irregularities formed at the time of manufacturing the pin 70. The recess 81 makes one revolution around the outer circumference of the pin 70. The position of the recess 81 in the axial direction of the pin 70 can be arbitrarily selected. In one example, the recess 81 is provided at the center in the axial direction of the pin 70. The concave portion 81 is recessed toward the central axis of the pin 70 with respect to the outer peripheral surface 71 of the pin 70.
The diameter of the pin 70 is included in the range of 0.35mm to 1.5 mm. The depth XA of the concave portion 81 is included in the range of 1 μm to 100 μm. The depth XA of the concave portion 81 is preferably included in the range of 15 μm to 60 μm. The depth XA of the recessed portion 81 is represented by, for example, the distance between a straight line LA passing through the outer peripheral surface 71 of the pin 70 and the bottom 81A of the recessed portion 81 in the orthogonal cross section.
The width XB of the recessed portion 81 in the pin axial direction is represented by the distance between one edge 81B and the other edge 81C of the recessed portion 81 in a straight line LA passing through the outer peripheral surface 71 in an orthogonal cross section. The width XB of the concave portion 81 is smaller than the thickness of the score wheel 60, and is preferably 50 μm or more.
The restricted portion 90 includes a convex portion 91 that contacts the concave portion 81 at two points. Therefore, the structure of the restricted portion 90 is simple. The surface 91A of the projection 91 is formed between the first side surface 61A and the second side surface 61B in the thickness direction DT, and is a curved surface defined by a predetermined radius of curvature RB. Therefore, stress concentration is less likely to occur in the convex portion 91. The relationship between the width of the concave portion 81 and the radius of curvature RB of the convex portion 91 can be arbitrarily selected. In the first example, since the edges 81B and 81C of the concave portion 81 and the surface 91A of the convex portion 91 are in line contact with each other at two points, the scribing wheel 60 is stably supported by the pin 70, and the frictional resistance during scribing is reduced. The height HA of the projection 91 is in the range of 0.1 μm to 20 μm. Preferably, the height HA of the projections 91 is in the range of 0.5 μm to 15 μm. The height HA of the projection 91 is represented by the distance between a straight line LB passing through the boundary between the side surfaces 61A, 61B and the surface 91A of the body portion 61 and the apex 91B of the projection 91. The minimum inner diameter of the projection 91 of the insertion hole 63 of the scribing wheel 60 is slightly larger than the maximum outer diameter of the pin 70.
The operation and effect of the holder unit 40 will be described. In a state where the scribing wheel 60 is pressed against the brittle material substrate GB without scanning, the apex 91B of the restricted portion 90 of the scribing wheel 60 is in contact with the restricting portion 80 of the pin 70 in the orthogonal cross section. In fact, a certain range of the restricted portion 90 is in line contact with the restricting portion 80. The restricted portion 90 receives a reaction force acting in the pressing direction from the restricting portion 80. When the second reaction force acts on the scribing wheel 60 in accordance with the scanning of the scribing wheel 60, the second reaction force that moves the restricted portion 90 in the pin axial direction is received by the restricting portion 80 of the pin 70. Therefore, the axial displacement of the scribing wheel 60 is prevented, and the scribing wheel 60 travels in the scanning direction, thereby forming a linear scribing line on the brittle material substrate GB. Therefore, the scribe line along the scanning direction of the holder unit 40 can be easily formed.
(experiment)
The holder unit of the present embodiment was used to scribe a line, and the amount of displacement in the axial direction of the scribing wheel was verified. As the scribing wheel, a scribing wheel having a curved surface-shaped convex part with a height of 13 μm formed on a scribing wheel with an outer diameter of 2.5mm, an inner diameter of 0.82mm and a thickness of 0.64mm was used. Further, as the pin, a pin having a recess portion with a width of 285 μm and a bottom depth of 50 μm formed on a pin with an outer diameter of 0.80mm and a length of 5.99mm was used.
Using the holder unit, scribe lines of 80mm length were formed on the glass substrate. In order to eliminate the influence immediately after the start of scribing, the amount of deviation of the scribe line in the lateral direction (direction perpendicular to the scribing direction) was measured at intervals of 0.2mm for the scribe line having a length of 20mm from the position 5mm from the scribe start point. The amount of deviation of the score line is believed to be primarily due to wheel axial displacement within the holder. The measurement results are shown in FIG. 3. In addition, as a comparative example, the amount of deviation of the scribing line was measured in the same manner using a holder unit using an existing scribing wheel having the same shape as that of the embodiment except that the convex portion was not provided and an existing pin having the same shape as that of the embodiment except that the concave portion was not provided. The measurement results of the comparative example are shown in FIG. 4.
In the holder unit of the embodiment, although it is confirmed that the scribe line periodically curves to the left and right, the deviation amount of the scribe line is about 2 μm at most. In the holder unit according to the embodiment, since the scribing wheel is stably supported at two points between the regulating portion and the regulated portion, it can be said that the amount of deviation of the scribing line can be suppressed by suppressing the displacement in the wheel axial direction. Therefore, the holder unit of the present embodiment can easily form the scribe line along the scanning direction of the holder unit.
In contrast, in the holder unit of the comparative example, the scribe line irregularly curves and runs, and the maximum deviation amount is about 14 μm. In the holder unit of the comparative example, the contact position between the scribing wheel and the pin is unstable during scribing, and the axial displacement of the scribing wheel occurs, or the scribing wheel is inclined in the holder, thereby causing large irregular variation in the scribing line.
Even when the holder unit having the recess 81 with a width of 408 μm and the same other structure as that of the above embodiment is used, the same tendency as that of the above embodiment can be seen.
(modification example)
The above embodiments are illustrative of the holder unit according to the present invention, and the scribing wheel and the pin thereof, and are not intended to limit the embodiments. The holder unit, and the scribing wheel and the pin thereof according to the present invention may be different from those exemplified in the embodiments. Examples thereof include a mode in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a mode in which a new configuration is added to the embodiment. An example of a modification of the embodiment is described below.
The structure of the restricting portion 80 provided on the pin 70 may be arbitrarily changed. Fig. 5 shows a structure of a pin including a restricting portion of a modification. Fig. 5 (a) is an enlarged side view of a portion of the pin 170 including the restricting portion 180 according to the first modification. In the pin regulating portion 180, the recess 181 is a groove having a curved surface having a predetermined radius of curvature in a side view, and is provided so as to surround the outer circumference of the pin 170. Here, the curvature radius of the concave portion 181 is preferably smaller than the curvature radius RB of the convex portion 91.
Fig. 5 (b) is an enlarged side view of a portion of the pin 270 of the second modification including the restricting portion 280. In the restricting portion 280, the recess 281 is a rectangular groove having a predetermined depth in a side view, and is provided so as to surround the outer circumference of the pin 270. Fig. 5 (c) is an enlarged side view of a portion of the pin 370 according to the third modification, including the restricting portion 380. In the restricting portion 380, the recess portion 381 is a V-shaped groove having an inclined surface facing the deepest portion in a side view, and is provided so as to surround the outer circumference of the pin 370 once.
The shape of the regulating portion is not limited to these modifications as long as it has a predetermined depth that does not contact the apex of the regulated portion of the scribing wheel. For example, two convex portions having a height equal to the depth of the concave portion of the embodiment may be provided so as to surround the outer periphery of the pin 70 at a predetermined interval.
The structure of the restricted portion 90 of the scribing wheel 60 may be arbitrarily changed. In one example, the restricted portion 90 of the holder unit 40 may include fine irregularities formed on the inner surface of the insertion hole 63 of the scribing wheel 60. In this case, the restricted portion 90 is a projection of a predetermined height provided in the insertion hole 63, and the maximum height Rz in the surface thereof is preferably 0.5 μm to 2.0 μm. Thus, even when the height of the convex portion of the restricted portion is relatively small, the displacement in the wheel axial direction can be more reliably suppressed when the two points of the edge 81B and the other edge 81C of the restricted portion are in contact with each other. The shape of the restricted portion 90 is not limited to the configuration disclosed in the above embodiment, and may be, for example, a shape having a flat portion in a part thereof.
Claims (5)
1. A holder unit comprising:
a scribing wheel;
a pin inserted into the insertion hole of the scribing wheel and rotatably supporting the scribing wheel; and
a holder for holding the pin, wherein the pin is fixed on the holder,
the holder unit is characterized in that,
the scribing wheel is supported by a limited part arranged on the inner circumferential surface of the insertion hole and a limited part arranged on the pin in a two-point contact manner.
2. The holder unit according to claim 1,
the restricting portion is a recess formed in the outer periphery of the pin,
the restricted portion is a convex curved surface.
3. The holder unit according to claim 2,
the width of the concave part is smaller than the thickness of the scribing wheel.
4. The holder unit according to claim 2,
the convex curved surface is provided over the entire thickness direction of the scribing wheel.
5. A pin for being inserted into an insertion hole of a scribing wheel and supporting the scribing wheel to be rotatable,
the pin is characterized in that it is provided with,
the pin is provided with a restricting portion that contacts the insertion hole of the scribing wheel at two points.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-100896 | 2019-05-30 | ||
| JP2019100896 | 2019-05-30 | ||
| JP2020-057727 | 2020-03-27 | ||
| JP2020057727A JP7474475B2 (en) | 2019-05-30 | 2020-03-27 | Holder Unit and Pin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112008890A true CN112008890A (en) | 2020-12-01 |
| CN112008890B CN112008890B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010345297.0A Active CN112008890B (en) | 2019-05-30 | 2020-04-27 | Holder unit and pin |
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|---|---|
| CN (1) | CN112008890B (en) |
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