JP5847018B2 - Holder and wheel unit - Google Patents

Description

  The present invention relates to a holder for holding a scribing wheel for forming a scribe line on a brittle material substrate such as a glass substrate, a ceramic substrate, or a silicon substrate, and a wheel unit including the scribing wheel and the holder.

  Conventionally, in the manufacturing process of flat display panels such as liquid crystal display panels and organic electroluminescence (EL) panels, solar cells, etc., a step of dividing a brittle material substrate such as a mother glass substrate is provided. In these cutting processes, the scribing wheel (also referred to as a cutter wheel) rolls the scribing wheel on the surface of the brittle material substrate while applying a load corresponding to various conditions such as the material and thickness of the brittle material substrate. Thus, a scribe line is formed, and a predetermined force is applied to the brittle material substrate so that the brittle material substrate is divided along the scribe line to manufacture individual panels and various substrates.

  Here, the wheel unit provided with the scribing wheel currently disclosed by the following patent document 1 is demonstrated using FIG. 7A is a front view of the wheel unit disclosed in Patent Document 1 below, and FIG. 7B is a partial cross-sectional view taken along the line VIIB-VIIB in FIG. 7A.

  The wheel unit 50 includes a holder 51 and a scribing wheel 52, and the scribing wheel 52 is rotatably held on the lower end side of the holder 51. The holder 51 is a rectangular parallelepiped member whose lower part is formed in a substantially triangular shape, and has a through hole 53 for fixing the holder 51 to the upper part. A holder groove 54 (see FIG. 7B) is formed below the holder 51 so as to open a triangular lower portion of the holder 51, and support portions 55 and 56 are formed by this triangular portion sandwiching the holder groove 54. Yes. The opposing surfaces of the support portions 55 and 56 of the holder 51 are formed substantially in parallel, and the distance between the holder grooves 54 is set to be slightly larger than the thickness of the scribing wheel 52. For example, the width w of the holder groove 54 of the holder 51 for holding the scribing wheel 52 having a thickness d of 0.65 mm is, for example, about 0.67 mm.

  Pin holes 57 and 58 that pass through the support portions 55 and 56, respectively, are formed coaxially on the lower ends of the left and right support portions 55 and 56. The pin holes 57 and 58 are circular through holes that intersect the holder groove 54 perpendicularly and hold the pins 59 of the scribing wheel 52. Above these pin holes 57, 58, a gap adjusting hole 60 is formed which has a small inner diameter on the support groove 55 side on the support groove 55 side and a large outer diameter on the support groove 55 side. A spacing screw 61 is attached to the spacing adjusting hole 60. The spacing screw 61 finely adjusts the spacing w of the holder groove 54. In FIG. 7B, in order to facilitate understanding of the configuration, the pin 59 and the spacing screw 61 are shown in outline rather than in cross section.

  A stopper 62 is attached to the right side of the interval adjusting hole 60 of the support portion 55 by a fixing screw 63, and a stopper 64 is similarly attached to the left side of the interval adjusting hole 60 of the supporting portion 56 by a fixing screw 65. It is attached. The clasps 62 and 64 hold the pin 59 in the pin holes 57 and 58 so that the pin 59 does not fall off. As shown in FIG. 7A, the clasps 62 and 64 have a washer shape with one end protruding.

  The scribing wheel 52 is a disk-shaped member made of a metal such as cemented carbide or sintered diamond, for example, having a thickness d of about 0.65 mm, and has a through hole at the center. The scribing wheel 52 has a blade having a V-shaped vertical section that forms a ridge line along the outer peripheral portion. The inclined surfaces on both sides of the ridge line usually intersect with each other at an angle of 90 to 165 ° to form a ridge line. The pin 59 is a cylindrical member formed of, for example, a metal such as cemented carbide or sintered diamond, and one end thereof has a pointed shape.

  The assembly of the wheel unit 50 is performed as follows. First, as shown in FIG. 7B, a spacing screw 61 is inserted from the spacing adjustment hole 60 and is engaged with a thread groove of the spacing adjustment hole 60. At this time, the spacing screw 61 is not tightened. Next, the stopper 62 is attached from the support portion 55 side by the fixing screw 63, and one end of the pin hole 57 is closed. Next, the scribing wheel 52 is inserted and held in the holder groove 54, and the pin 59 is inserted from the pointed portion into the pin hole 58, the through hole of the scribing wheel 52 and the pin hole 57. The pin 59 is inserted until the pointed portion of the pin 59 comes into contact with the clasp 62 in the vicinity of one opening of the pin hole 57, and the clasp 64 is screwed with the fixing screw 65, and the left end of the pin hole 58 is inserted. Close. As a result, the pin 59 does not fall out of the pin holes 57 and 58, and the scribing wheel 52 is rotatably held by the pin 59.

  At this time, since the clearance between the holder groove 54 and the scribing wheel 52 of the wheel unit 50 may vary, the interval is adjusted by the interval screw 61 inserted into the interval adjustment hole 60. Thus, the clearance can be set to an optimum value, for example, an interval of 2 μm. If a brittle material substrate such as a glass substrate is scribed using the wheel unit 50 in this state, the position of the scribing wheel 52 in the holder groove 54 is stabilized, so there is almost no left-right blurring in the traveling direction of the scribing wheel 52. . This produces an excellent effect that the linearity of the scribe line when scribed can be improved.

JP 2011-093186 A JP 2011-240540 A

  In the wheel unit 50, the pin holes 57 and 58 of the holder 51 are fixed by the fixing screws 63 and 65 by the clasps 62 and 64 for the purpose of preventing the pins 59 from coming off. When exchanging the scribing wheel 52, the fixing screws 63 and 65 are loosened, the clasps 62 and 64 are shifted, and then the pins 59 are removed. However, the fixing screws 63 and 65 are loosened while the wheel unit 50 is in use, and the pin 59 may come off due to the stoppers 62 and 64 moving or coming off, or the loose stoppers 62 and 64 may be cut. There is a risk of damaging the target brittle material substrate.

  As the scribing speed increases, the vibration transmitted from the scribing wheel 52 through the pin 59 to the holder 51 increases, so that the possibility that the fixing screws 63 and 65 are loosened increases. Therefore, in order to increase the scribing efficiency by increasing the scribing speed of the brittle material substrate, it is necessary to make the stopper plates 62 and 64 difficult to move or disengage. On the other hand, if the clasps are firmly fixed, the clasps 62 and 64 are difficult to move or disengage, but it takes time to perform maintenance when the scribing wheel needs to be replaced.

  Patent Document 2 describes a wheel holder that can extend the service life while maintaining high rotational accuracy by forming the periphery of the pin insertion hole with a cylindrical body made of a super hard material. In this wheel holder as well, the cover fixed by screws is used to block the pin insertion hole of the holder to prevent the cutter pin from falling off. When exchanging the cutter wheel, the cover is removed and the cutter pin is pulled out, so that there is a problem that the exchanging work is complicated and there is a high risk of losing small screws and covers. Further, in this wheel holder, the wire of the wire electric discharge machine is passed through the cover mounting hole, and moved along the trajectory from the cover mounting hole to the cylindrical body, whereby the pin insertion hole is formed in the axial center portion of the cylindrical body. Process. At this time, depending on the shape of the wheel holder, the size of the wheel, the size of the cylindrical body, the position and size of the mounting hole, the arrangement of the cover mounting hole becomes like the holder shown in Patent Document 1, and the Patent Document As in the case of the holder described in No. 1, the cover is loosened, and the loose cover sometimes damages the brittle material substrate to be cut.

  The present invention has been made to solve the above-described problems of the prior art, and the stopper plate is screwed with fixing screws at two positions, and the pin hole is moved by shifting the stopper plate without removing the fixing screw. It is an object of the present invention to provide a wheel unit that can be exposed so that it is difficult to remove a clasp even if a fixing screw is loosened, and a scribing wheel can be easily replaced.

In order to achieve the above object, the holder of the present invention comprises:
A groove in which the scribing wheel is rotatably held, a pair of support portions having mutually parallel faces formed by the groove, and a pair of pin holes formed coaxially with the pair of support portions, respectively And a holder having a clasp screwed so as to close the pin hole on at least one side of the outer surfaces of the pair of support portions,
The clasp is fixed to the holder by a fixing screw in at least two places, and when the fixing screw is loosened, the pin hole is rotated or slid upward or laterally. It is made to be able to expose.

  In the holder of the present invention, stoppers provided to prevent the pins from being removed from the holder are screwed to the holder by fixing screws in at least two places. For this reason, even if the fixing screw is loosened due to vibration or the like during use, it is difficult for the stopper plate to move, so that the pin is less likely to come out than when it is screwed in one place. In addition, the stopper plate is configured so that the pin hole can be exposed by rotating or sliding upward or laterally with the fixing screw loosened, so that the scribing wheel is pulled out of the pin hole. Can be easily replaced in a short time, and maintenance becomes easy.

  In the holder of the present invention, one of the screwing locations of the clasp may be a through hole and the other location may be a notch.

  When such a configuration is employed, the pin holes can be easily exposed by loosening all the fixing screws and rotating the stopper plate around the position where the through holes are formed. As the shape of the stopper plate, any shape can be adopted as long as the pin hole is not exposed when all the fixing screws are tightened and does not come into contact with the brittle material substrate during scribing.

  In the holder of the present invention, it is preferable that the lower side of the clasp is opened when the notch is provided in the clasp.

  With such a configuration, the stopper plate is rotated upward when the pin hole is exposed, but the stopper plate does not fall down even when the fixing screw is loosened during use. It becomes hard to be damaged.

  In the holder of the present invention, each of the screwing locations of the clasps may be a notch portion where the lower side of the clasp is open.

  With such a configuration, even if the fixing screw is loosened during use, the clasp does not fall, so that it is difficult for the brittle material substrate to be damaged by the clasp, and the fixing screw is loosened and the clasp is slid upward. By moving, the pin hole can be exposed and the stopper plate can be easily removed. Therefore, the scribing wheel can be easily replaced in a short time by pulling out the pin from the pin hole, and the maintenance becomes easy.

  Further, in the holder of the present invention, the stopper plate is formed so that the lateral width of the portion closing the pin hole is narrower than the lateral width of the screw fastening portion, and the screw fastening portion of the stopper plate extends in the lateral direction. It may be a rounded rectangular through hole.

  With such a configuration, the pin hole can be exposed only by sliding the stopper plate in the right direction or the left direction. Therefore, the scribing wheel can be easily replaced in a short time by pulling out the pin from the pin hole, and the maintenance becomes easy. In addition, as for the shape of a clasp, if the lower side is narrower than a screwing location, the lower shape may be stepped, triangular, trapezoidal, or arcuate.

  In the holder of the present invention, the screwing portions of the clasps may be rounded rectangular through holes extending in the vertical direction. In this case, it is preferable that the screwing portion of the clasp is an upper end portion of the rounded rectangular through hole.

  With such a configuration, the pin hole can be easily exposed by sliding the stopper plate in the vertical direction, so the scribing wheel can be easily replaced in a short time by pulling the pin out of the pin hole. Maintenance can be facilitated. Further, when the screwing position is at the upper end of the rounded rectangular through hole, even if the fixing screw is loosened during use, the clasp will not be lowered, and the brittle material substrate will not be damaged by the clasp. Note that the extending direction of the rounded rectangular through-holes does not necessarily have to be perpendicular to the horizontal plane. It may be.

  In the holder of the present invention, the clasp may be provided on both outer surfaces of the pair of support portions.

  With such a configuration, the stoppers provided on the outer surfaces of the pair of support portions can be shared, so that the number of parts prepared in advance can be reduced and the cost can be reduced. Become.

  In the holder of the present invention, the clasp is provided only on one side of the outer surfaces of the pair of support portions, and at least one simple through hole is provided on the other side of the outer surfaces of the pair of support portions. Another formed clasp may be screwed at the at least one through-hole portion so as to close the pin hole.

  With such a configuration, it is not necessary to loosen the fixing screw for maintenance with another clasp, so it can be firmly fixed to the holder and both clasps may be accidentally removed. Disappears.

  In the holder of the present invention, the clasp is provided only on one side of the outer surface of the pair of support portions, and the pin hole formed on the other side of the pair of support portions has the outer surface side of the pin. The diameter may be smaller than the outer diameter.

  Since the pin inserted into the pin hole hits a smaller diameter portion than the outer diameter of the pin formed on the other side of the pair of support portions of the pin hole, a stopper plate is provided only on one side of the outer surface of the pair of support portions. Even the pin is difficult to pull out from the pin hole. Therefore, it is possible to obtain a holder that can achieve the above-described effects in a similar manner with a simple configuration.

  Furthermore, the wheel unit of the present invention is rotatably held by the pin according to any one of the above, a pin inserted between a pair of pin holes of the holder, and a groove formed in the holder. And a scribing wheel.

  According to the wheel unit of the present invention, it is possible to obtain a wheel unit capable of achieving the effects of the holder of the present invention.

FIG. 1A is a front view of the wheel unit according to the first embodiment, and FIG. 1B is a left side view. 2A is a front view when the clasp of the wheel unit of Embodiment 1 is rotated, FIG. 2B is a front view of the clasp, and FIG. 2C is a rear view of the wheel unit. 3A is a front view of the wheel unit according to the second embodiment, FIG. 3B is a front view of the clasp, and FIG. 3C is a front view of the wheel unit when the clasp is slid. 4A is a front view of the wheel unit according to the third embodiment, FIG. 4B is a front view of the clasp, and FIG. 4C is a front view of the wheel unit when the clasp is slid. FIG. 5A is a front view of the wheel unit according to the fourth embodiment, FIG. 5B is a front view of the clasp, and FIG. 5C is a front view of the wheel unit when the clasp is slid. It is a partial cross-section left side view of the wheel unit of the fifth embodiment. 7A is a front view of a conventional wheel unit, and FIG. 7B is a cross-sectional view taken along the line VIIB-VIIB in FIG. 7A.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a wheel unit for embodying the technical idea of the present invention, and is not intended to identify the present invention as the wheel unit. Other embodiments within the scope of the claims are equally applicable. In this specification, the terms “upward direction” and “downward direction” indicate the side (cut end side) on which the wheel unit is brought into contact with the brittle material substrate as “downward direction” and the opposite side as “upward direction”. ".

[Embodiment 1]
A wheel unit 10 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. 1A is a front view of the wheel unit of the first embodiment, and FIG. 1B is a left side view. Moreover, FIG. 2A is a front view when the clasp of the wheel unit of Embodiment 1 is rotated, FIG. 2B is a front view of the clasp, and FIG. 2C is a rear view of the wheel unit.

  As in the case of the conventional wheel unit shown in FIG. 7, the wheel unit 10 according to the first embodiment includes a holder 11 and a scribing wheel 12, and the scribing wheel 12 is rotatable at the lower end of the holder 11. Is retained. The holder 11 is a rectangular parallelepiped member whose lower part is formed in a substantially trapezoidal shape with a convex downward, and has a through-hole 13 for fixing the holder 11 at the upper part.

  The scribing wheel 12 is a disk-shaped member made of, for example, sintered diamond and having a thickness of about 0.65 mm, and has a through hole in the center. In addition, the scribing wheel 12 has a V-shaped blade that forms a ridge line along the outer peripheral portion, as in the conventional example. The inclined surfaces on both sides of the ridge line usually intersect with each other at an angle of 90 to 165 °, and the ridge line is formed by these inclined surfaces.

  Below the holder 11, a holder groove 14 is formed so as to open below the substantially trapezoidal portion of the holder 11, and the pair of support portions 15, 16 are attached to the substantially trapezoidal portion sandwiching the holder groove 14. Forming. In addition, cylindrical support holes, which are through holes, are coaxially formed in the support portions 15 and 16 of the holder 11, and cylindrical bodies 15a and 16a made of cemented carbide material (made of sintered diamond or cemented carbide), respectively. Is fixed by brazing. The lower part of the cylindrical body is processed together with the holder 11 and removed. Further, pin holes 17 and 18 penetrating each other are formed coaxially in the cylindrical bodies 15a and 16a. The pin holes 17 and 18 intersect with the holder groove 14 perpendicularly and are circular through holes that hold the pins 19 of the scribing wheel 12. The pin 19 is a cylindrical member formed of, for example, a metal such as cemented carbide, sintered diamond, or the like, and one end has a pointed shape.

  Although not shown, the holder 11 is formed with two fixing screw mounting holes for mounting a fixing screw, which will be described later, and one of them has a wire introduction groove communicating with the pin holes 17 and 18, respectively. Is formed. The wire introduction groove is for introducing a wire for processing the pin holes 17 and 18 of the cylindrical bodies 15a and 16a by wire electric discharge machining.

  The distance between the cylinders 15 a and 16 a in the holder groove 14 is set to be slightly larger than the thickness of the scribing wheel 12. The thickness of the scribing wheel 12 is about 0.65 mm, for example, and the distance between the cylindrical bodies 15a and 16a in the holder groove 14 is about 0.67 mm, for example.

  Further, in the wheel unit 10 of the first embodiment, both end portions of the pin holes 17 and 18 formed in the cylindrical bodies 15a and 16a of the holder 11 are closed by clasps 22 and 23, respectively. The detailed shapes of these clasps 22 and 23 will be described later. These clasps 22 and 23 are fixed to the outer surface of the holder 11 by fixing screws 24 a and 24 b and 25 a and 25 b, respectively, at two locations above the holder 11.

  The assembly of the wheel unit 10 is performed as follows. First, the stopper plate 23 is attached from the support portion 16 side with the fixing screws 25a and 25b, and the outside of the pin hole 18 is closed. Next, a part of the scribing wheel 12 is inserted and held between the holder grooves 14, and the pin 19 is inserted from the pointed portion into the pin hole 17, the through hole of the scribing wheel 12 and the pin hole 18. The pin 19 is inserted until the pointed portion of the pin 19 comes into contact with the stopper 23 near the one opening of the pin hole 18, and then the stopper 22 is screwed with the fixing screws 24a and 24b from the support portion 15 side. Stop and close the outside of the pin hole 17. As a result, the pin 19 does not fall out of the pin holes 17 and 18, and the pin 19 itself is rotatably held in the pin holes 17 and 18, and the scribing wheel 12 is rotatably held by the pin 19. Is done.

  If the wheel unit 10 in this state is used to scribe a brittle material substrate such as a glass substrate, the position of the scribing wheel 12 is stabilized between the cylindrical bodies 15a and 16a of the holder groove 14, so that the scribing wheel 12 travels in the traveling direction. There is almost no blurring on the left and right, and the linearity of the scribe line when scribed can be improved.

  Here, the shapes of the clasps 22 and 23 used in the first embodiment will be described in detail. One clasp 22 is screwed and fixed to the upper side of the holder 11 at two locations. As shown in FIG. 2B, one of the clasps 22 is a notch 22a having an open bottom. The other is a screw hole 22b consisting of a simple through hole. The state where the stopper plate 22 is attached to the holder is as shown in FIGS. 1A and 2A, and is indicated by a broken line in FIG. 2A. As shown in FIG. 2C, the other clasp 23 is screwed to the upper side of the holder 11 at two locations, but the two screw fastening locations are simply through holes (not shown). Yes.

  When the scribing wheel 12 reaches the end of its life and needs to be replaced, first, the fixing screws 24a and 24b that fix one stopper plate 22 are loosened. At this time, it is not necessary to remove both the fixing screws 24a and 24b. In this state, one clasp 22 is rotated in the direction indicated by the arrow in FIG. 2A around the screw hole 22b. The clasp 22 in this state is shown by a solid line in FIG. 2A.

  Since the pin hole 17 is exposed in this state, the scribing wheel 12 can be removed when the pin 19 is pulled out. Then, a new scribing wheel is prepared, and the wheel unit 10 is assembled again in the same manner as in the assembly process described above. In addition, it is only necessary to confirm whether or not the fixing screws 25a and 25b are loose on the other clasp 23 side.

  According to the wheel unit 10 of the first embodiment, when the scribing wheel 12 is replaced, the pin holes 17 are exposed by simply loosening the fixing screws 24a and 24b and rotating one of the stopper plates 22 upward. The scribing wheel 12 can be exchanged in a short time, and maintenance becomes easy. Further, even when the fixing screws 24a to 24b are loosened due to vibration or the like when the wheel unit is used, one of the clasps 22 is supported by the fixing screws 24a and 24b and falls downward (scribing wheel 12 side). Therefore, the clasp 22 makes it difficult to damage the brittle material substrate. Further, since the other clasp 23 does not need to be particularly operated, the fixing screws 25a and 25b can be tightened to be firmly fixed, so that the other clasp 23 falls and becomes a brittle material substrate. There is very little scratching. Further, since the stopper plate 22 almost completely covers the lower part of the holder, the wire introduction groove formed so as to communicate with the pin holes 17 and 18 from one of the fixing screw mounting holes is not exposed at the time of scribing. It becomes difficult for the fine powder to enter from the wire introduction groove.

  In the wheel unit 10 of the first embodiment, an example in which one stopper plate 22 and the other stopper plate 23 are different from each other is used, but one stopper plate 22 is used as the other stopper plate 23. You may use the thing of the same structure as. With such a configuration, it is only necessary to prepare one type of stopper plate, and it is not necessary to prepare a different configuration, which leads to a cost reduction of the wheel unit 10.

  Moreover, in the wheel unit 10 of Embodiment 1, the example using the thing which the downward opening was used as the notch 22a of one clasp 22 was shown. However, when the notch 22a having an opening at the top is used, the same effect as that of using the opening at the bottom is obtained from the viewpoint of easy replacement of the scribing wheel 12. If the fixing screw is loosened due to this, the clasp may fall and come into contact with the brittle material substrate, which may cause damage to the brittle material substrate. Moreover, in the wheel unit 10 of Embodiment 1, although the example using what was screwed and fixed to the upper side of the holder 11 at two places was shown as one clasp 22, it is being fixed at at least two places. What is necessary is just three places or more. In this case, the screw hole 22b1 consisting of a simple through hole is used at one place, and the remaining screw-fastened place is a notch 22a opened at the lower side. The pin hole 17 can be exposed by rotating one stopper plate 22 upward.

[Embodiment 2]
Next, the wheel unit 10A according to the second embodiment will be described with reference to FIG. 3A is a front view of the wheel unit 10A of the second embodiment, FIG. 3B is a front view of the clasp, and FIG. 3C is a front view of the wheel unit when the clasp is slid. In FIG. 3, the same components as those of the wheel unit 10 according to the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The wheel unit 10A of the second embodiment is different in configuration from the wheel unit 10 of the first embodiment in the shape of one clasp 22A of the holder 11A and the shape of the screwing portion formed on the clasp 22A. That is, in the wheel unit 10 of the first embodiment, one of the two screwing locations is a notch opened to the lower side and the other is a simple through hole. Then, as shown in FIG. 3B, the clasp 22A has two points for screwing, which are rounded rectangular through holes 22c and 22d extending in the lateral direction, and a pin hole 17. This is a point that the width of the closed portion 22Aa is formed in a step shape so that the width of the portion 22Aa is narrower than the width of the screwed portion. Note that the shape and the like of the other clasp are the same as those in the first embodiment, and thus detailed description thereof is omitted.

  One clasp 22A used in the wheel unit 10A of the second embodiment is screwed and fixed to the upper side of the holder 11A at two locations. The state in which the clasp 22A is attached to the holder is shown in FIG. This is as shown in FIGS. 3A and 3C, and is indicated by a broken line in FIG. 3C.

  When the scribing wheel 12 reaches the end of its life and needs to be replaced, first, the fixing screws 24a and 24b that fix the stopper 22A with screws are loosened. At this time, it is not necessary to remove both the fixing screws 24a and 24b. In this state, one stopper plate 22A is slid in the lateral direction indicated by an arrow in FIG. 3C. The clasp 22A in this state is shown by a solid line in FIG. 3C.

  Since the pin hole 17 is exposed in this state, the scribing wheel 12 can be removed when the pin 19 is pulled out. Then, a new scribing wheel is prepared, and the wheel unit 10A is assembled again in the same manner as the assembly process of the wheel unit 10 of the first embodiment described above.

  According to the wheel unit 10A of the second embodiment, when the scribing wheel 12 is replaced, the pin holes 17 are exposed by simply loosening the fixing screws 24a and 24b and sliding one stopper plate 22A laterally. Therefore, the scribing wheel 12 can be replaced in a short time, and maintenance is facilitated. Further, even if the fixing screws 24a to 24b may be loosened due to vibration or the like when the wheel unit 10A is used, the one stopper plate 22 is supported by the fixing screws 24a and 24b and does not fall down. The clasp 22A makes it difficult to damage the brittle material substrate.

  In addition, in the clasp 22A of the second embodiment, the step 22Aa for closing the pin hole 17 is formed in a stepped shape so that the lateral width is narrower than the lateral width of the screwing portion, but such a configuration is adopted. This is because the pin hole 17 can be exposed even if the sliding distance of the stopper plate 22A in the lateral direction is short. Therefore, in the clasp 22A of the second embodiment, when the sliding distance may be large, the same one as the clasp 24 used in the wheel unit 10 of the first embodiment may be used. In addition, the shape of the lower side of the portion 22Aa that closes the pin hole 17 of the clasp 22A of Embodiment 2 is not limited to the step shape as described above, but may be a triangular shape, a trapezoidal shape, or an arc shape. it can. In addition, the clasp 22A of the second embodiment can be fixed to the upper side of the holder 11A with screws at three or more positions similarly to the clasp 22 of the first embodiment.

[Embodiment 3]
Next, the wheel unit 10B of Embodiment 3 is demonstrated using FIG. 4A is a front view of the wheel unit 10B of the third embodiment, FIG. 4B is a front view of the clasp, and FIG. 4C is a front view of the wheel unit 10B when the clasp is slid. In FIG. 4, the same components as those of the wheel unit 10 of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The wheel unit 10B according to the third embodiment is different in configuration from the wheel unit 10 according to the first embodiment in the shape of a screwing portion formed on one clasp 22B of the holder 11B. That is, in the wheel unit 10 according to the first embodiment, as shown in FIG. 2B, one of the two screw-fixed portions formed on one clasp 22 is a notch 22a whose lower side is opened, and the other Is a screw hole 22b consisting of a simple through-hole, but the clasp 22B used in the wheel unit 10B of the third embodiment has a notch 22e in which both lower sides are opened as shown in FIG. 4B. , 22f. Note that the shape and the like of the other clasp are the same as those in the first embodiment, and thus detailed description thereof is omitted.

  One clasp 22B used in the wheel unit 10B of the third embodiment is screwed and fixed to the upper side of the holder 11B at two locations. The state in which the clasp 22B is attached to the holder 11B is as follows. This is as shown in FIGS. 4A and 4C, and is indicated by a broken line in FIG. 4C.

  When the scribing wheel 12 reaches the end of its life and needs to be replaced, first, the fixing screws 24a and 24b that fix the stopper 22B with screws are loosened. At this time, it is not necessary to remove both the fixing screws 24a and 24b. In this state, one stopper plate 22B is slid in the upward direction indicated by the arrow in FIG. 4C. The clasp 22B in this state is shown by a solid line in FIG. 4C.

  In this state, the stopper plate 22B can be removed from the holder 11B, and the pin hole 17 is exposed. Therefore, when the pin 19 is pulled out, the scribing wheel 12 can be easily removed. Then, a new scribing wheel 12 is prepared, and the wheel unit 10B is assembled again in the same manner as the assembly process of the wheel unit 10 of the first embodiment described above.

  According to the wheel unit 10B of the third embodiment, when replacing the scribing wheel 12, the pin holes 17 are exposed by simply loosening the fixing screws 24a and 24b and sliding one of the stopper plates 22B upward. Therefore, the scribing wheel 12 can be replaced in a short time, and maintenance is facilitated. Further, even if the fixing screws 24a to 24b may be loosened due to vibration or the like when the wheel unit 10B is used, the one stopper plate 22B is supported by the fixing screws 24a and 24b and does not fall down. The clasp 22 makes it difficult to damage the brittle material substrate.

  In addition, in the clasp 24B of the third embodiment, the example in which the two screwing locations are the notches 22e and 22f in which the lower side is opened is shown. It is better not to adopt the stopper 22B because the stopper 22B may drop when the fixing screws 24a to 24b are loosened due to vibration or the like when the wheel unit 10B is used.

[Embodiment 4]
Next, the wheel unit 10C of the fourth embodiment will be described with reference to FIG. 5A is a front view of the wheel unit 10C of the fourth embodiment, FIG. 5B is a front view of the clasp, and FIG. 5C is a front view of the wheel unit 10C when the clasp is slid. In FIG. 5, the same reference numerals are given to the same components as those of the wheel unit 10 of the first embodiment shown in FIGS. 1 and 2, and detailed description thereof is omitted.

  The wheel unit 10C according to the fourth embodiment is different from the wheel unit 10A according to the second embodiment in the shape of a screwing portion formed on one clasp 22C of the holder 11C. That is, in the wheel unit 10A of the second embodiment, the two screwing portions formed on one clasp 22A are both rounded rectangular through-holes extending laterally as shown in FIG. 3B. As shown in FIG. 5B, the clasps 22C used in the wheel unit 10C of the fourth embodiment are both rounded rectangular through holes 22g and 22h extending in the vertical direction, respectively. This is the point. Note that the shape and the like of the other clasp are the same as those in the first embodiment, and thus detailed description thereof is omitted.

  One clasp 22C used in the wheel unit 10C of the fourth embodiment is screwed and fixed to the upper side of the holder 11C at two locations. The state in which the clasp 22C is attached to the holder is shown in FIG. This is as shown in FIG. 5A and FIG. 5C, and is indicated by a broken line in FIG. 5C. It should be noted that the screwing portion of the clasp 22C is configured to be the upper end portion of the rounded rectangular through holes 22g and 22h so that the clasp 22C does not fall even if the fixing screws 24a and 24b are loosened.

  When the scribing wheel 12 reaches the end of its life and needs to be replaced, first, the fixing screws 24a and 24b that fix the stopper 22C with screws are loosened. At this time, it is not necessary to remove both the fixing screws 24a and 24b. In this state, one clasp 22C is slid in the upward direction indicated by the arrow in FIG. 5C. The clasp 22C in this state is shown by a solid line in FIG. 5C.

  In this state, since the pin hole 17 is exposed, the scribing wheel 12 can be easily removed when the pin 19 is pulled out. Then, a new scribing wheel 12 is prepared, and the wheel unit 10C is assembled again in the same manner as the assembly process of the wheel unit 10 of the first embodiment described above.

  According to the wheel unit 10C of the fourth embodiment, when replacing the scribing wheel 12, the pin holes 17 are exposed by simply loosening the fixing screws 24a and 24b and sliding one of the stopper plates 22C upward. Therefore, the scribing wheel 12 can be replaced in a short time, and maintenance is facilitated. Further, even if the fixing screws 24a to 24b are loosened due to vibration or the like when the wheel unit 10C is used, the one stopper plate 22C is supported by the fixing screws 24a and 24b and does not fall down. The clasp 22 makes it difficult to damage the brittle material substrate.

  In addition, in the clasp 22C of the fourth embodiment, an example in which the two screwing portions are both rounded rectangular through holes 22g and 22h extending in the vertical direction is shown. The extending direction of the rectangular through holes 22g and 22h does not necessarily have to be a direction perpendicular to the horizontal plane. If the stopper plate 22C can be slid relative to the vertical plane, it is oblique to the horizontal plane. It may be.

[Embodiment 5]
Next, the wheel unit 10D of Embodiment 5 will be described with reference to FIG. FIG. 6 is a partial cross-sectional left side view of the wheel unit 10D of the fifth embodiment. The difference between the wheel unit 10D of the fifth embodiment and the wheel unit 10 of the first embodiment is the number of clasps and the internal shape of the pin hole 18 formed in the support portion 16 on the other side. Therefore, in FIG. 6, only a partial cross-sectional left side view corresponding to FIG. 1B is shown, and the other drawings are omitted, and the same reference numerals are given to the same components as those of the wheel unit 10 of the first embodiment. Detailed description thereof will be omitted.

  That is, in the wheel unit 10D of the fifth embodiment, one clasp 22 has the same configuration as the clasp 22 of the wheel unit 10 of the first embodiment. However, in the wheel unit 10 of the first embodiment, the other clasp 23 is provided, but in the wheel unit 10D of the fifth embodiment, this other clasp is not provided, and in addition, the other clasp of the holder 11D is provided. The pin hole 18 formed in the support portion 16 has a smaller diameter on the outer surface side than the outer diameter of the pin 19.

  Therefore, the pin 19 inserted into the pin holes 17 and 18 abuts against a portion 18 a having a smaller diameter than the outer diameter of the pin 19 formed on the outer surface side of the support portion 16 on the other side of the pin hole 18. Even if it is provided only, the pin 19 is difficult to be removed from the pin holes 18 and 19. Therefore, according to the wheel unit 10D of the fifth embodiment, the same operational effects as the wheel unit 10 of the first embodiment can be achieved with a simple configuration.

DESCRIPTION OF SYMBOLS 10, 10A-10D ... Wheel unit 11, 11A-11D ... Holder 12 ... Scribing wheel 13 ... Through-hole 14 ... Holder groove | channel 15, 16 ... Support part 15a, 16a ... Ring member 17, 18 ... Pin hole 18a ... (Pin hole) ) Small diameter portion 19 ... Pin 20 ... Clearance 22, 22A to 22C ... One clasp 22Aa ... Location for closing the pin hole (of one clasp) 22a, 22e, 22f ... Notch 22b ... Screw opened downward Holes 22c, 22d, 22g, 22h ... round rectangular through holes 23 ... other clasps 24, 25 ... fixing screws

Claims (11)

A groove in which the scribing wheel is rotatably held, a pair of support portions having mutually parallel faces formed by the groove, and a pair of pin holes formed coaxially with the pair of support portions, respectively And a holder having a clasp screwed so as to close the pin hole on at least one side of the outer surfaces of the pair of support portions,
The clasp is fixed to the holder by a fixing screw in at least two places, and when the fixing screw is loosened, the pin hole is rotated or slid upward or laterally. The holder is characterized in that it can be exposed.   2. The holder according to claim 1, wherein one screw fastening portion of the clasp is formed of a through hole and the other portion is formed of a cutout portion.   The holder according to claim 2, wherein the notch has an open lower side of the clasp.   The holder according to claim 1, wherein each of the screw fastening portions of the clasp is formed by a notch portion in which a lower side of the clasp is opened.   The clasp is formed so that the lateral width of the portion that closes the pin hole is narrower than the screwing portion, and the screwing portion of the clasp is a through-hole of a rounded rectangular shape extending in the lateral direction. The holder according to claim 1, wherein:   The holder according to claim 1, wherein each of the screw fastening portions of the clasp is a rounded rectangular through hole extending in the vertical direction.   The holder according to claim 6, wherein the screwing portion of the clasp is an upper end portion of the rounded rectangular through hole.   The holder according to claim 1, wherein the clasp is provided on both outer surfaces of the pair of support portions.   The clasp is provided only on one side of the outer surfaces of the pair of support portions, and another clasp in which at least one simple through hole is formed on the other side of the outer surfaces of the pair of support portions, The holder according to any one of claims 1 to 7, wherein the holder is screwed at the at least one through-hole portion so as to close the pin hole.   The clasp is provided only on one side of the outer surface of the pair of support portions, and the pin hole formed on the other side of the pair of support portions has a smaller diameter than the pin hole formed on the one side on the outer surface side. The holder according to any one of claims 1 to 7, wherein   A holder according to any one of claims 1 to 10, a pin inserted between a pair of pin holes of the holder, a scribing wheel rotatably held by the pin in a groove formed in the holder, Having a wheel unit.

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