Blade detachable tool

Abstract

To provide a blade detachable tool which can suppress damage of a washer blade during wearing.SOLUTION: A blade detachable tool 1 for attaching / detaching a washer blade to / from a flange fixed to a spindle tip includes at least a columnar body 10, a plurality of suction holes 25 which is formed at positions corresponding to the washer blade in a circumferential direction, and sucks and holds the washer blade, on an outer periphery of one end face 11 of the body 10, a supply port 21 for supplying gas, discharge ports 24 for discharging the gas, and a flow channel 26 for generating a negative pressure in the suction holes 25, wherein when the washer blade is sucked and held on the one end face 11 of the body 10, the washer blade is sucked and held thereon by a negative pressure generated by the suction hole 25, when the suction and holding of the washer blade is released, the gas is discharged from the suction holes 25 by blocking the discharge ports 24 and the suction and holding of the washer blade are released.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a blade attachment / detachment tool for attaching and detaching a washer blade. [Background technology]

[0002] Silicon wafers with multiple devices such as ICs (Integrated Circuits) and LSIs (Large Scale Integration) formed on their front surface are ground on the back surface to a specified thickness, and then cut into individual devices by a cutting machine for use in electrical equipment such as mobile phones and personal computers.

[0003] One example of the cutting blade used in the cutting device is a known annular cutting blade (washer blade) such as a metal blade or a resin blade.

[0004] The washer blade is housed in a blade case and handled carefully to prevent damage during transportation (see, for example, Patent Document 1).

[0005] At the manufacturing site, a worker removes the cutting blade from the blade case with his or her bare hands, attaches it to a flange attached to the end of the spindle of the cutting device, and fixes it to the end of the spindle with a fixing flange and a fixing nut. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4431016 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the washer blade has a small thickness of, for example, 0.1 mm or more and 0.3 mm or less, and there is a problem that the washer blade may be damaged if an operator handles it with bare hands.

[0008] An object of the present invention is to provide a blade attachment / detachment tool that can prevent damage to a washer blade during attachment. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems and achieve the object, the blade attachment / detachment device of the present invention is a blade attachment / detachment device for attaching and detaching a washer blade to a flange fixed to the tip of a spindle of a cutting device, and is equipped with at least a cylindrical main body and a plurality of suction holes formed in the circumferential direction on the outer periphery of one end face of the main body at positions corresponding to the washer blade, the suction holes being configured to suck and hold the washer blade, a supply section being configured to supply gas, a discharge section being configured to discharge the gas, and a flow path being configured to create negative pressure in the suction holes, and when the washer blade is to be released from the suction hold, the discharge section is blocked to discharge gas from the suction hole, thereby releasing the washer blade from the suction hold. Effect of the Invention

[0010] The present invention has the effect of suppressing damage to the washer blade during installation. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration example of a blade attachment tool according to the first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic view of the blade attachment tool shown in FIG. [Diagram 3] FIG. 3 is an exploded perspective view of a cutting unit in which a washer blade is attached to and detached from the tip of a spindle by the blade attachment tool shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view that typically illustrates a state in which the blade attachment / detachment tool illustrated in FIG. 1 holds a washer blade. [Diagram 5] FIG. 5 is a cross-sectional view showing a schematic state in which the blade attaching / detaching tool shown in FIG. 4 holds a washer blade. [Figure 6] FIG. 6 is a cross-sectional view showing a state in which one end face of the blade attaching / detaching tool shown in FIG. 5 faces a flange fixed to the tip of a spindle. [Figure 7] FIG. 7 is a cross-sectional view showing a schematic state in which the boss portion of the flange is inserted into the insertion recess of the blade attachment / detachment tool shown in FIG. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the blade attachment / detachment tool shown in FIG. 7 has attached the washer blade to the flange. [Figure 9] FIG. 9 is a cross-sectional view showing a schematic state in which the blade attachment / detachment tool shown in FIG. 8 has been separated from the flange. [Figure 10] FIG. 10 is a perspective view illustrating a configuration example of the blade attachment tool according to the second embodiment. [Figure 11] FIG. 11 is a cross-sectional view that typically shows the blade attachment tool shown in FIG. [Figure 12] FIG. 12 is a perspective view that typically shows one end face of the blade attachment tool shown in FIG. [Figure 13] FIG. 13 is a cross-sectional view showing a state in which the main body of the blade attaching / detaching tool shown in FIG. 10 holds a washer blade. [Figure 14] FIG. 14 is a cross-sectional view showing a state in which one end face of the main body of the blade attacher holding the washer blade shown in FIG. 13 faces a flange fixed to the tip of a spindle. [Figure 15] 15 is a cross-sectional view showing a schematic state in which the boss portion of the flange is inserted into the insertion recess of the main body of the blade attaching / detaching tool shown in FIG. [Figure 16]FIG. 16 is a cross-sectional view showing a state in which the blade attachment / detachment tool shown in FIG. 15 has attached a washer blade to a flange. [Figure 17] 17 is a cross-sectional view showing a schematic state in which the boss portion of the flange is inserted into the insertion recess of the main body of the blade attachment / detachment tool shown in FIG. 10 when removing the washer blade. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The form (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the following embodiment. Furthermore, the components described below include those that a person skilled in the art can easily imagine and those that are substantially the same. Furthermore, the configurations described below can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the configurations can be made without departing from the gist of the present invention.

[0013] [Embodiment 1] A blade attachment tool according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a typical configuration example of the blade attachment tool according to the first embodiment. Fig. 2 is a schematic cross-sectional view showing the blade attachment tool shown in Fig. 1. Fig. 3 is an exploded perspective view showing a cutting unit in which a washer blade is attached to and detached from the tip of a spindle by the blade attachment tool shown in Fig. 1.

[0014] (Cutting unit) The blade attachment tool 1 shown in FIG. 1 and FIG. 2 is for attaching and detaching a washer blade 101 to and from the tip of a spindle 120 of a cutting unit 100 of a cutting device shown in FIG. 3. As shown in FIG. 3, the washer blade 101 is an extremely thin cutting grindstone having a ring shape. The washer blade 101 has a cutting blade 102 to which abrasive grains are fixed with a bond, and in the first embodiment, the washer blade 101 is composed only of the cutting blade 102. In the first embodiment, the washer blade 101 is formed in a ring shape, and a circular mounting hole 103 is formed on the inner periphery side. The washer blade 101 is attached to the spindle 120 of the cutting unit 100 of the cutting device shown in FIG. 3, and cuts a workpiece such as a wafer such as a semiconductor wafer or an optical device wafer.

[0015] As shown in FIG. 3, the cutting unit 100 to which the washer blade 101 is attached comprises a spindle housing 110 which is movable in the Y-axis direction parallel to the horizontal direction by a Y-axis moving unit of the cutting device and movable in the Z-axis direction parallel to the vertical direction by a Z-axis moving unit, a spindle 120 which is rotatably mounted on the spindle housing 110 about an axis parallel to the Y-axis direction and rotated about the axis by a spindle motor (not shown), a flange 130 fixed to the tip of the spindle 120, a holding flange 140, a fixing screw 150, a nut 160, a blade cover 170, and a cutting water supply nozzle 180.

[0016] The spindle 120 is provided with its tip protruding from the tip surface of the spindle housing 110, and is formed in a tapered shape (also called a taper) that gradually increases in diameter as the tip approaches the spindle housing 110. In addition, the spindle 120 has a screw hole 121 opening in the tip surface.

[0017] The flange 130 is fixed to the tip of the spindle 120 and supports the washer blade 101. The flange 130 has a cylindrical boss portion 131 extending in the Y-axis direction, and a receiving flange portion 132 provided at one end of the boss portion 131 closer to the spindle housing 110.

[0018] The boss portion 131 extends in the Y-axis direction, and has an outer diameter smaller than the inner diameter of the central mounting hole 103 of the washer blade 101 over the entire length. The boss portion 131 has a through hole 133 on the inner periphery into which the tip of the spindle 120 is inserted. The boss portion 131 has a stepped surface 134 formed on the outer periphery of the through hole 133, the stepped surface 134 being parallel to the Z-axis direction. The boss portion 131 also has a male thread 135 formed on its outer periphery.

[0019] The receiving flange portion 132 is formed in a ring shape that protrudes from the axial rear end of the boss portion 131 near the spindle housing 110 toward the outer periphery along the radial direction and has a diameter larger than the outer diameter of the boss portion 131. The receiving flange portion 132 has an outer diameter that is larger than the inner diameter of the washer blade 101 and smaller than the outer diameter of the washer blade 101. The receiving flange portion 132 includes a support surface 136 that is flat along the Z-axis direction at the outer edge and supports the washer blade 101, and a ring-shaped annular protrusion 137 that is located on the inner periphery side of the support surface 136 and has an outer diameter equal to the inner diameter of the washer blade 101. The annular protrusion 137 is fitted into the mounting hole 103 of the washer blade 101 to position the washer blade 101. The boss portion 131 and the receiving flange portion 132 are arranged coaxially.

[0020] The flange 130 is fixed to the tip of the spindle 120 by inserting the tip of the spindle 120 into the through hole 133, threading a fixing screw 150 into a screw hole 121 provided in the tip surface of the spindle 120 through the through hole 133, and bringing a head 151 of the fixing screw 150 into close contact with the stepped surface 134. The flange 130 supports the washer blade 101 with the support surface 136 of the receiving flange portion 132 by inserting the boss portion 131 into the mounting hole 103 of the washer blade 101 and fitting the annular protrusion 137 into the mounting hole 103.

[0021] The pressing flange 140 is formed in an annular shape having an attachment hole 141 in the center to be attached to the boss portion 131 of the flange 130. The inner diameter of the pressing flange 140 is equal to the outer diameter of the boss portion 131, and the outer diameter is smaller than the outer diameter of the washer blade 101. The tip of the boss portion 131 of the flange 130 passes through the attachment hole 141, and the pressing flange 140 clamps the washer blade 101 between itself and the support surface 136 of the flange 130.

[0022] The nut 160 is formed in an annular shape, and a female thread 161 that screws into the male thread 135 of the boss portion 131 is formed on the inner peripheral surface. The boss portion 131 of the flange 130 fixed to the spindle 120 is passed through the mounting hole 141 of the pressing flange 140, and the female thread 161 screws into the male thread 135 of the boss portion 131 of the flange 130 in a state in which the pressing flange 140 holds the washer blade 101 between the support surface 136, and the nut 160 is fastened to the boss portion 131. By fastening the nut 160 to the boss portion 131, the washer blade 101 is held and fixed between the flange 130 and the pressing flange 140.

[0023] The blade cover 170 includes a blade cover body 171 fixed to the tip surface of the spindle housing 110, and a slide cover 172 that is slidable in the X-axis direction that is horizontal to the blade cover body 171 and perpendicular to the Y-axis direction. The blade cover body 171 is configured to expose the tip of the spindle 120.

[0024] The slide cover 172 is connected to the blade cover body 171 via an air cylinder 173, and slides in the X-axis direction relative to the blade cover body 171 by pressurized air supplied to the air cylinder 173. The slide cover 172 slides between an attachment / detachment position shown by a solid line in Fig. 3 where it is separated from the blade cover body 171 and where the washer blade 101 is attached / detached to / from the tip of the spindle 120 via the flange 130, and a covering position shown by a dashed line in Fig. 3 where it covers the top of the washer blade 101.

[0025] A pair of cutting water supply nozzles 180 are fixed to the lower end of the slide cover 172. In the first embodiment, the cutting water supply nozzles 180 extend in a substantially L-shape when viewed from the side, and the lower end of the washer blade 101 is positioned between them. The cutting water supply nozzle 180 receives cutting water (pure water in the first embodiment) from a cutting water supply source (not shown), and supplies the supplied cutting water to the washer blade 101 to cool and clean the washer blade 101.

[0026] The washer blade 101 is attached to the spindle 120 of the cutting unit 100 of the cutting device in a state where it is sandwiched between the flanges 130 and 140. In the first embodiment, the washer blade 101 has a constant thickness, which is not less than 0.1 mm and not more than 0.3 mm.

[0027] (Blade attachment / detachment tool) The blade attachment / detachment tool 1 according to the first embodiment is a jig for attaching and detaching a washer blade 101 to a flange 130 fixed to the tip of a spindle 120 of a cutting unit 100 of a cutting device. The blade attachment / detachment tool 1 includes a cylindrical main body 10 and a gas flow path 20, as shown in Figs. 1 and 2.

[0028] The main body 10 is formed in a cylindrical shape with an outer diameter smaller than the outer diameter of the washer blade 101 and larger than the inner diameter of the washer blade 101. The main body 10 has one circular end face 11 (corresponding to one end face) formed flat in a direction perpendicular to the axis, and is provided with an insertion recess 12 into which the boss portion 131 of the flange 130 inserts, and a positioning protrusion 13 that is fitted into the mounting hole 103 of the washer blade 101 to position the washer blade 101.

[0029] The entry recess 12 is formed concavely from one end face 11, and is formed as a circular recess in plan view with an inner diameter larger than the outer diameter of the boss portion 131. The depth of the entry recess 12 from one end face 11 is deeper than the amount of protrusion from the receiving flange portion 132 at the tip of the boss portion 131. The positioning protrusion 13 is formed in a circular shape convex from one end face 11 and with an outer diameter equal to the inner diameter of the washer blade 101, and is disposed at a position coaxial with the entry recess 12. In the first embodiment, the amount of protrusion of the positioning protrusion 13 from one end face 11 is equal to or slightly larger than the thickness of the cutting edge 102 of the washer blade 101.

[0030] The gas flow path 20 is a space provided within the main body 10 through which the pressurized gas supplied from the gas supply source 2 flows within the main body 10 and is discharged to the outside of the main body 10. The gas flow path 20 includes a supply port 21 (corresponding to a supply section), a gas supply passage 22, a throttle section 23, an exhaust port 24 (corresponding to an exhaust section), a suction hole 25, and a flow path 26.

[0031] The supply port 21 opens on the outer surface of the main body 10 and is connected to the gas supply source 2 via a flexible pipe 3 or the like. In the first embodiment, the supply port 21 opens on the other circular end face 14 of the main body 10. The supply port 21 supplies gas from the gas supply source 2 into the main body 10.

[0032] The gas supply passage 22 is a passage provided in the main body 10, one end of which is connected to the supply port 21 and through which the gas from the gas supply source 2 flows via the supply port 21. In the first embodiment, the gas supply passage 22 extends from the one end connected to the supply port 21 along the axis of the main body 10 and is bent toward the outer peripheral surface 15 of the main body 10.

[0033] One end of the throttle portion 23 is connected to the other end of the gas supply passage 22, and extends from the gas supply passage 22 toward the outer circumferential surface 15 of the main body 10. The throttle portion 23 is formed so as to become gradually thinner with increasing distance from the gas supply passage 22, so that the opening area in the cross section gradually decreases with increasing distance from the gas supply passage 22.

[0034] The exhaust port 24 is connected to the other end of the narrowed portion 23 and opens to the outer circumferential surface 15 of the main body 10 to exhaust gas.

[0035] The suction holes 25 open on the outer periphery of the positioning protrusion 13 on one end face 11 of the main body 10, and are formed at intervals in the circumferential direction on the outer periphery of the positioning protrusion 13 on one end face 11 of the main body 10 to suck and hold the washer blade 101 on one end face 11. Note that the outer periphery of the positioning protrusion 13 on one end face 11 of the main body 10 refers to a position corresponding to the washer blade 101 positioned by the positioning protrusion 13. In the first embodiment, the suction hole 25 is blocked by the washer blade 101 positioned by the positioning protrusion 13.

[0036] The flow path 26 generates a negative pressure (air pressure lower than atmospheric pressure) in the suction holes 25. The flow path 26 includes a suction hole connecting portion 27 and a connecting flow path 28. The suction hole connecting portion 27 includes a hole connecting portion 271 connected to each suction hole 25, and a connecting space 272 provided in the center inside the main body 10 and connecting all the hole connecting portions 271.

[0037] Both ends of connecting flow passage 28 are connected to connecting space 272 and the other end of throttle portion 23, and extend gradually in a direction approaching throttle portion 23 and outer peripheral surface 15 of main body 10 as it moves from connecting space 272 toward the other end of throttle portion 23, and connects to the other end of throttle portion 23 from the rear side in the direction of gas flow in throttle portion 23. In a state in which exhaust port 24 discharges gas from gas supply source 2, flow passage 26 generates negative pressure in each suction hole 25 by connecting flow passage 28 being sucked by the gas flowing in throttle portion 23.

[0038] Next, a method of mounting the washer blade 101 to the flange 130 fixed to the tip of the spindle 120 of the cutting unit 100 of the cutting device using the blade attachment tool 1 having the above-mentioned configuration will be described with reference to the drawings. FIG. 4 is a cross-sectional view showing a state in which the blade attachment tool shown in FIG. 1 holds a washer blade. FIG. 5 is a cross-sectional view showing a state in which the blade attachment tool shown in FIG. 4 holds a washer blade. FIG. 6 is a cross-sectional view showing a state in which one end face of the blade attachment tool shown in FIG. 5 faces a flange fixed to the tip of the spindle. FIG. 7 is a cross-sectional view showing a state in which the boss part of the flange is inserted into the insertion recess of the blade attachment tool shown in FIG. 6. FIG. 8 is a cross-sectional view showing a state in which the blade attachment tool shown in FIG. 7 attaches a washer blade to the flange. FIG. 9 is a cross-sectional view showing a state in which the blade attachment tool shown in FIG. 8 is separated from the flange.

[0039] Before the washer blade 101 is attached to the cutting unit 100 of the cutting device, the rotation of the spindle 120 around its axis is stopped, the slide cover 172 is positioned at the attachment / detachment position, and the nut 160 and the holding flange 140 are removed from the boss portion 131. First, in the blade attachment / detachment tool 1, pressurized gas is supplied from the gas supply source 2 to the supply port 21. Then, as shown by the arrows in FIG. 4, the gas flows from the supply port 21 through the gas supply passage 22 and the narrowed portion 23, and is discharged from the exhaust port 24 to the outside of the main body 10.

[0040] In addition, the flow rate of the gas supplied to the main body 10 is accelerated as it flows through the narrowing portion 23, and it sucks inside the flow path 26 and sucks the suction hole 25, generating a negative pressure in the suction hole 25. As shown in Fig. 4, the blade attachment / detachment tool 1 faces one end face 11 of the main body 10 against the washer blade 101 in a blade case (not shown), and then sucks the washer blade 101 through the suction hole 25 to hold the washer blade 101 by suction on the one end face 11, as shown in Fig. 5. At this time, the positioning protrusion 13 is fitted into the mounting hole 103, and the blade attachment / detachment tool 1 positions the washer blade 101 on the one end face 11 of the main body 10.

[0041] As shown in Fig. 6, in the blade attachment / detachment tool 1, one end face 11 of the main body 10 holding the washer blade 101 by suction is opposed to the boss portion 131 of the flange 130, and then the boss portion 131 is inserted into the insertion recess 12, and the positioning protrusion 13 is abutted against the annular protrusion 137 of the flange 130, as shown in Fig. 7. In the blade attachment / detachment tool 1, the discharge port 24 is blocked by the operator's finger or the like, as shown in Fig. 8.

[0042] Then, as shown by the arrow in Fig. 8, the gas that had been discharged outside the main body 10 from the exhaust port 24 enters the flow path 26 from the other end of the throttle portion 23 and is discharged from the suction hole 25. Then, the washer blade 101 is pushed out toward the receiving flange portion 132 of the flange 130 as shown in Fig. 8, the annular protrusion 137 is fitted into the mounting hole 103, and the washer blade 101 is supported by the support surface 136 and attached to the flange 130. The blade attachment / detachment tool 1 is separated from the flange 130 as shown in Fig. 9.

[0043] In this way, when the blade attaching / detaching tool 1 suction-holds the washer blade 101 to one end surface 11 of the main body 10, the washer blade 101 is suction-held by the negative pressure generated in the suction hole 25, and when the suction-holding of the washer blade 101 is to be released, the exhaust port 24 is blocked to discharge the gas from the suction hole 25, thereby releasing the suction-holding of the washer blade 101. When removing the washer blade 101 from the flange 130, the blade attaching / detaching tool 1 removes the washer blade 101 from the flange 130 by performing the reverse operation to that performed when attaching the washer blade 101.

[0044] As described above, the blade attaching / detaching tool 1 according to the first embodiment includes the suction hole 25 on the outer periphery of the positioning protrusion 13 on one end face 11 of the main body 10, the supply port 21 for supplying gas into the main body 10, the exhaust port 24 for exhausting the gas, the gas supply passage 22 for supplying gas from the supply port 21 to the exhaust port 24, and the flow path 26 connected to the other end of the narrowed portion 23 and connected to the suction hole 25. Therefore, when the exhaust port 24 is opened, the suction hole 25 is sucked in by the gas flowing inside the narrowed portion 23 via the flow path 26, and the washer blade 101 can be sucked and held on the one end face 11.

[0045] In addition, the blade attachment / detachment device 1 of embodiment 1 can attach the washer blade 101 to the flange 130 by inserting the boss portion 131 into the insertion recess 12 and blocking the exhaust port 24, thereby discharging gas through the suction hole 25.

[0046] For this reason, the blade attachment / detachment tool 1 according to the first embodiment can suck and hold the washer blade 101 on one end surface 11 without an operator or the like touching the washer blade 101, and can attach and detach the washer blade 101 to and from the flange 130. As a result, the blade attachment / detachment tool 1 according to the first embodiment has the effect of allowing the operator to attach and detach the washer blade 101 to and from the flange 130 fixed to the tip of the spindle 120 of the cutting device without touching the washer blade 101, and suppressing damage to the washer blade 101 during attachment.

[0047] [Embodiment 2] The blade attachment tool according to the second embodiment will be described with reference to the drawings. Fig. 10 is a perspective view showing a typical configuration example of the blade attachment tool according to the second embodiment. Fig. 11 is a sectional view showing a typical configuration of the blade attachment tool shown in Fig. 10. Fig. 12 is a perspective view showing a typical end face of the blade attachment tool shown in Fig. 10. In Figs. 10, 11 and 12, the same parts as those in the first embodiment are designated by the same reference numerals, and description thereof will be omitted.

[0048] As shown in Fig. 10 and Fig. 11, the blade attachment / detachment tool 1-2 according to the second embodiment includes a gun body 30, a main body 10, and a gas flow path 20-2. The gun body 30 includes a grip portion 31 that is held by an operator, and a main body portion 32 that is connected to the grip portion 31. The grip portion 31 and the main body portion 32 each extend in a straight line. The base end of the main body portion 32 is connected to the tip of the grip portion 31 and intersects with the longitudinal direction of the grip portion 31. The gun body 30 of the blade attachment / detachment tool 1 according to the second embodiment includes the grip portion 31 and the main body portion 32 that are integrally formed, and is composed of two plate members 33 that are arranged in parallel with a gap between them.

[0049] The gun body 30 also includes an operating lever 34 rotatably supported at the tip of the grip portion 31 of the two plate members 33, a switching lever 35 rotatably supported at the tip of the main body portion 32, and a switching mechanism 36. The levers 34 and 35 are formed in a rod shape, and the center of rotation is disposed between the two plate members 33. One end of the operating lever 34 is rotatably supported by the plate members 33, and the other end is disposed closer to the tip of the main body portion 32 than the grip portion 31. The operating lever 34 is biased by a biasing means (not shown) in a direction in which the base end approaches the grip portion 31.

[0050] The switching lever 35 has a central portion in the longitudinal direction supported by the plate member 33 so as to be freely rotatable.

[0051] The switching mechanism 36 includes a slide member 37 that is rotatably connected to one end of the switching lever 35 and slides along the longitudinal direction of the main body 32 as the switching lever 35 rotates about its center, and a guide member 38 that is fixed to the plate member 33 and slides the slide member 37 along the longitudinal direction of the main body 32. The switching lever 35 has one end rotatably connected to one end of the switching lever 35 and the other end located closer to the base end of the main body 32, i.e., the grip portion 31 side, than the one end. A through hole 39 passes through the other end of the switching lever 35.

[0052] The rotation center of the operating lever 34, the rotation center of the switching lever 35, and the rotation center of the slide member 37 relative to the switching lever 35 are perpendicular to the longitudinal direction of the main body 32 and are parallel to one another.

[0053] The other end face 14 of the main body 10 of the blade attachment / detachment tool 1 according to the second embodiment is attached to the tip of the main body part 32 of the gun main body 30, and both end faces 11, 14 are perpendicular to the longitudinal direction of the main body part 32. As in the first embodiment, the main body 10 has an insertion recess 12, a suction hole 25, and a positioning protrusion 13 formed on one end face 11 as shown in FIG.

[0054] As shown in FIG. 11, the gas flow path 20-2 includes an opening / closing valve 41 as a supply section for supplying gas into the main body 10, a branch joint 42 connected to the opening / closing valve 41, a suction hole 25, an exhaust hole 43, a flow path 26-2, and a second flow path 47.

[0055] The opening / closing valve 41 is disposed between the two plate members 33 of the gun body 30 and at the base end of the grip part 31, and is supplied with pressurized gas from the gas supply source 2. The opening / closing valve 41 is provided with a valve body 411 having a flow path formed therein for passing gas and accommodating a valve body that opens and closes the flow path, a link lever 412 rotatably provided on the valve body 411, and an opening / closing member 413 that is provided in the valve body 411 so as to be capable of projecting and retracting, and that faces a central portion of the link lever 412 in the longitudinal direction.

[0056] One end of the link lever 412 is rotatably supported by the valve body 411, and the other end is in contact with the grip portion 31 side of the other end of the operating lever 34. The other end of the link lever 412 is biased by a biasing means (not shown) in a direction toward the other end of the operating lever 34. When the opening / closing member 413 protrudes from the valve body 411, it causes the valve body to close the flow path in the valve body 411, and when it retracts into the valve body 411, it causes the valve body to open the flow path in the valve body 411.

[0057] 11, when the other end of the operating lever 34 is separated from the grip portion 31, the opening / closing member 413 protrudes from the valve body 411, causing the valve body to close the flow path in the valve body 411, and blocking the flow of gas from the gas supply source 2 in the flow path. When the other end of the operating lever 34 is brought closer to the grip portion 31 from the position shown in FIG. 11, the other end of the link lever 412 is pressed by the other end of the operating lever 34, and the central portion of the link lever 412 presses the opening / closing member 413 toward the valve body 411, causing the opening / closing member 413 to sink into the valve body 411. Then, the opening / closing valve 41 causes the valve body to open the flow path in the valve body 411, allowing gas from the gas supply source 2 to flow in the flow path.

[0058] The branch joint 42 is disposed between two plate members 33 of the gun body 30. The branch joint 42 is a pipe joint having a flow path formed therein, one inlet 421, and two outlets 422, 423. The branch joint 42 has the inlet 421 connected to the open / close valve 41, and branches the gas from the gas supply source 2 via the open open / close valve 41 to be discharged from each of the two outlets 422, 423. The branch joint 42 has the inlet 421 and the two outlets 422, 423 parallel to each other.

[0059] As shown in FIG. 12, a plurality of ejection holes 43 open at the tip of positioning protrusion 13 on one end face 11 of body 10, and are formed at intervals in the circumferential direction of body 10.

[0060] The flow path 26-2 generates a negative pressure in the suction hole 25, and includes a suction hole connecting part 27 formed in the main body 10, and a connecting flow path 44. The suction hole connecting part 27 includes a hole connecting part 271 and a connecting space 272, similar to the first embodiment.

[0061] The connecting flow passage 44 connects the connecting space 272 and the branch joint 42. The connecting flow passage 44 includes a second branch joint 45 and a connecting pipe 46. The second branch joint 45 is disposed between the two plate members 33 of the gun body 30. The second branch joint 45 is a pipe joint having a flow passage formed therein, one inlet 451, and two outlets 452, 453.

[0062] In the second embodiment, the second branch joint 45 has an inlet 451 and one of the outlets 452 arranged in the same straight line, and the other outlet 453 is perpendicular to the inlet 451 and the one of the outlets 452. The inlet 451 is connected to one of the outlets 422 of the branch joint 42. The one of the outlets 452 of the second branch joint 45 protrudes outside the main body portion 32 of the gun body 30, and is a discharge portion that discharges the gas clamped from the gas supply source 2 via the opening / closing valve 41 and the branch joint 42, etc.

[0063] 11, one outlet 452 of the second branch joint 45 overlaps with the through hole 39 of the slide member 37 and is opened when the other end is positioned closer to the main body 10 than one end of the switching lever 35. Also, one outlet 452 of the second branch joint 45 is blocked by the slide member 37 when the other end is positioned closer to the grip part 31 than one end of the switching lever 35.

[0064] The connecting pipe 46 is a pipe having a flow path formed therein. One end of the connecting pipe 46 is connected to the other outlet 453 of the second branch joint 45, and the other end is connected to the connecting space 272. In a state in which one outlet 452 of the second branch joint 45, which is the discharge part, discharges gas from the gas supply source 2, the connecting pipe 46 is sucked by the gas flowing from the inlet 451 to the one outlet 452 of the second branch joint 45, and the connecting pipe 46 is sucked by the gas flowing from the inlet 451 to the one outlet 452 of the second branch joint 45, thereby generating a negative pressure in each suction hole 25.

[0065] The second flow path 47 includes a nozzle hole connecting portion 48 formed in the main body 10, and a second connection flow path 49. The nozzle hole connecting portion 48 includes a hole connecting portion 481 connected to each nozzle hole 43, and a second connection space 482 provided in the center inside the main body 10, to which all the hole connecting portions 481 are connected and which is independent of (i.e., not connected to) the connection space 272.

[0066] The second connecting flow path 49 connects the second connecting space 482 and the branch joint 42. The second connecting flow path 49 is a pipe having a flow path formed therein. One end of the second connecting flow path 49 is connected to the other outlet 423 of the branch joint 42, and the other end is connected to the second connecting space 482. The second flow path 47 ejects the gas supplied from the gas supply source 2 via the branch joint 42 and the opening / closing valve 41 from the ejection hole 43.

[0067] 12, in the main body 10, an annular connecting groove 16 that connects the ejection holes 43 to each other is formed on the tip surface of the positioning protrusion 13, and a discharge groove 17 that opens into the connecting groove 16, i.e., the ejection holes 43 and the outer circumferential surface of the positioning protrusion 13. For this reason, in the second embodiment, the ejection holes 43 open to the bottom of the connecting groove 16. A plurality of discharge grooves 17 are formed at intervals (equally spaced in the second embodiment) in the circumferential direction of the positioning protrusion 13.

[0068] Next, a method of mounting the washer blade 101 to the flange 130 fixed to the tip of the spindle 120 of the cutting device using the blade attachment tool 1-2 having the above-mentioned configuration will be described with reference to the drawings. FIG. 13 is a cross-sectional view showing a state in which the main body of the blade attachment tool shown in FIG. 10 holds a washer blade. FIG. 14 is a cross-sectional view showing a state in which one end face of the main body of the blade attachment tool holding the washer blade shown in FIG. 13 faces the flange fixed to the tip of the spindle. FIG. 15 is a cross-sectional view showing a state in which the boss part of the flange is inserted into the insertion recess of the main body of the blade attachment tool shown in FIG. 14. FIG. 16 is a cross-sectional view showing a state in which the blade attachment tool shown in FIG. 15 attaches the washer blade to the flange. FIG. 17 is a cross-sectional view showing a state in which the boss part of the flange is inserted into the insertion recess of the main body of the blade attachment tool shown in FIG. 10 when removing the washer blade.

[0069] First, in the blade attachment / detachment tool 1-2, pressurized gas is supplied from the gas supply source 2 to the supply port 21, the gas is supplied to the opening / closing valve 41, and the other end of the switching lever 35 is positioned closer to the main body 10 than one end of the switching lever 35. When the operating lever 34 is rotated about one end in a direction in which the other end of the operating lever 34 approaches the grip part 31 against the biasing force of the biasing means, the link lever 412 and the opening / closing member 413, etc. are pressed by the operating lever 34, and the opening / closing valve 41 opens.

[0070] Then, in the blade attachment / detachment tool 1-2, gas supplied from the gas supply source 2 via the on-off valve 41 and the branch joint 42 is discharged from one outlet 452 of the second branch joint 45, and is sucked into the suction hole 25 via the other outlet 453 and the connecting pipe 46, etc., generating a negative pressure in the suction hole 25. As shown in Fig. 13, after one end face 11 of the main body 10 faces the washer blade 101 in a blade case (not shown), the blade attachment / detachment tool 1-2 sucks the washer blade 101 through the suction hole 25 and holds the washer blade 101 on the one end face 11 by suction.

[0071] At this time, the positioning protrusion 13 is fitted into the mounting hole 103, and the blade attaching / detaching tool 1-2 positions the washer blade 101 on one end surface 11 of the main body 10. In the blade attaching / detaching tool 1-2, gas supplied from the gas supply source 2 via the opening / closing valve 41 and the branch joint 42 is ejected from the ejection hole 43 via the second flow path 47.

[0072] As shown in Fig. 14, in the blade attachment / detachment tool 1-2, one end face 11 of the main body 10 holding the washer blade 101 by suction is opposed to the boss portion 131 of the flange 130, and then the boss portion 131 is inserted into the insertion recess 12, and the positioning protrusion 13 is abutted against the annular protrusion 137 of the flange 130, as shown in Fig. 15. Then, in the blade attachment / detachment tool 1-2, since the gas ejected from the ejection hole 43 is exhausted from the exhaust groove 17 through the connecting groove 16, the flow of the gas exhausted from the exhaust groove 17 generates the Bernoulli effect, causing negative pressure above the washer blade 101 held by suction on one end face 11, and the main body 10, i.e., the washer blade 101 and the flange 130, are aligned so as to be coaxial with each other.

[0073] When the switching lever 35 of the blade attachment / detachment tool 1-2 is rotated around the center in a direction in which the other end of the switching lever 35 approaches the gripping part 31 more than the one end, the sliding member 37 is slid by the switching lever 35, and the sliding member 37 closes one outlet 452 of the second branch joint 45, which is an exhaust port. Then, in the blade attachment / detachment tool 1-2, the gas discharged from one outlet 452 of the second branch joint 45 is discharged from the suction hole 25 via the other outlet 453, the connecting tube 46, etc. Then, as shown in FIG. 16, the washer blade 101 is pushed toward the receiving flange part 132 of the flange 130, the annular protrusion 137 is fitted into the mounting hole 103, and the washer blade 101 is supported by the support surface 136 and attached to the flange 130.

[0074] In this manner, the blade attaching / detaching tool 1-2 is used when attaching the washer blade 101 to the flange 130. When removing the washer blade 101 from the flange 130, the blade attaching / detaching tool 1-2 removes the washer blade 101 from the flange 130 by performing the reverse operation of that used when attaching the washer blade 101.

[0075] When removing the washer blade 101 from the flange 130, the blade attaching / detaching tool 1-2 inserts the boss portion 131 into the insertion recess 12 and abuts the positioning protrusion 13 against the annular protrusion 137 of the flange 130 in a state in which the other end of the switching lever 35 is positioned closer to the main body 10 than one end of the switching lever 35 to generate negative pressure in the suction hole 25. Then, the blade attaching / detaching tool 1-2 attracts the washer blade 101 to one end surface 11 so that the positioning protrusion 13 is fitted into the mounting hole 103, as shown in Fig. 17, by the Bernoulli effect, i.e., negative pressure, generated by the flow of gas that is ejected from the ejection hole 43, passes through the connecting groove 16, and is exhausted from the exhaust groove 17. After that, the blade attaching / detaching tool 1 sucks the washer blade 101 through the suction hole 25 and holds the washer blade 101 by suction on one end surface 11.

[0076] The blade attachment / detachment tool 1-2 according to the second embodiment includes a suction hole 25 on the outer periphery of the positioning protrusion 13 on one end face 11 of the main body 10, an on-off valve 41 for supplying gas, one outlet 452 of a second branch joint 45 which is a discharge part for discharging gas, a branch joint 42 for supplying gas from the on-off valve 41 to the one outlet 452 which is a discharge part, and a connecting pipe 46 connected to the other outlet 453 of the second branch joint 45 and the suction hole 25. Therefore, when the one outlet 452 which is a discharge part is opened, the suction hole 25 is sucked by the gas flowing inside the second branch joint 45 via the connecting pipe 46, and the washer blade 101 can be sucked and held on the one end face 11 of the blade attachment / detachment tool 1-2.

[0077] In addition, in the blade attachment / detachment device 1-2 of embodiment 2, the boss portion 131 is inserted into the insertion recess 12, and one of the outlets 452, which is the exhaust portion, is blocked, thereby discharging gas from the suction hole 25 and attaching the washer blade 101 to the flange 130.

[0078] As a result, the blade attachment / detachment device 1-2 of embodiment 2, like embodiment 1, can be attached and detached to the flange 130 fixed to the tip of the spindle 120 of the cutting device without the operator having to touch the washer blade 101, thereby achieving the effect of suppressing damage to the washer blade 101 during attachment.

[0079] Moreover, the blade attachment / detachment tool 1-2 according to the second embodiment includes a switching lever 35 and a switching mechanism 36 for switching between a state in which negative pressure is generated in the suction hole 25 and a state in which gas is discharged from the suction hole 25. Therefore, the blade attachment / detachment tool 1 according to the second embodiment can reliably hold the washer blade 101 on one end face 11 of the main body 10, and can reliably attach the washer blade 101 to the flange 130.

[0080] Moreover, the blade attachment / detachment tool 1-2 according to the second embodiment ejects gas from an ejection hole 43 opening at the bottom of a connecting groove 16 formed in the positioning protrusion 13 of the main body 10, and an exhaust groove 17 opens between the connecting groove 16 and the outer circumferential surface of the positioning protrusion 13. Therefore, when the blade attachment / detachment tool 1-2 according to the second embodiment is attached to the flange 130, the main body 10 can be aligned with respect to the flange 130 by the Bernoulli effect of gas ejected from the exhaust groove 17. Moreover, when the blade attachment / detachment tool 1-2 according to the second embodiment removes the washer blade 101 from the flange 130, the washer blade 101 can be pulled to one end surface 11 of the main body 10 by the Bernoulli effect of gas ejected from the exhaust groove 17.

[0081] It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. [Explanation of symbols]

[0082] 1,1-2 Blade attachment tool 10 Main unit 11 One end face (one end face) 21 Supply port (supply section) 24 Discharge port (discharge part) 25 Suction hole 26,26-2 Flow path 41 Opening and closing valve (supply section) 101 Washer Blade 120 Spindle 130 Flange 452 One outlet (discharge section)

Claims

[Claim 1] A blade attachment / detachment tool for attaching and detaching a washer blade to a flange fixed to a tip of a spindle of a cutting device, A cylindrical body, a plurality of suction holes are formed in the outer periphery of one end surface of the main body in the circumferential direction at positions corresponding to the washer blades, and the suction holes suck and hold the washer blades; The device includes at least a supply unit that supplies gas, a discharge unit that discharges gas, and a flow path that generates negative pressure in the suction hole, When the washer blade is sucked and held on one end surface of the main body, the washer blade is sucked and held by negative pressure generated in the suction hole, When releasing the suction and holding of the washer blade, the exhaust portion is blocked so that the gas is discharged from the suction hole, and the suction and holding of the washer blade is released. Blade attachment / detachment tool.

Images