Cutting device

Abstract

To provide a cutting device which can easily and surely cut a material to be cut.SOLUTION: A cutting device 1 includes: a support body 10; a rotor 20 which is rotatably supported around a support shaft by the support body 10; rotary blades 30, 40, 50 which are provided in the rotor 20; and a stationary blade 60 which is mounted in the support body 10 so that ridge lines of the rotary blades 30, 40, 50 and a ridge line of a blade face each other. The cutting device cuts a material to be cut between the rotary blades 30, 40, 50 and the stationary blade 60 by rotation of the rotor 20. The ridge line 61 of the blade of the stationary blade 60 extends along an axial direction of the support shaft. The ridge lines of the blades of the rotary blades 30, 40, 50 are formed into a V-shape in a plan view so that a center section along the axial direction of the support shaft projects in a rotation direction and are formed into a circular arc shape around the support shaft in a side view. Therefore, a gap between the ridge lines of the rotary blades 30, 40, 50 and the ridge line of the blade of the stationary blade 60 is maintained constant during rotation of the rotor 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cutting device, and more particularly to a cutting device that can be suitably used for cutting a carrier tape or the like discharged from a chip mounter. [Background technology]

[0002] The carrier tape that is discharged after electronic components are mounted on a substrate by a chip mounter is generally cut and then discarded. However, because cutting the carrier tape manually is a cumbersome process, cutting devices for carrier tape have traditionally been developed.

[0003] For example, the carrier tape cutting device disclosed in Patent Document 1 comprises a movable blade attached to one end of a reciprocating slider and a fixed blade facing the movable blade, and is configured to be able to cut the carrier tape by inserting it between the movable blade and the fixed blade. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-292593 A Summary of the Invention [Problem to be solved by the invention]

[0005] When cutting the carrier tape by reciprocating the movable blade against the fixed blade, as in the above-mentioned conventional carrier tape cutting device, there was a problem that the work of adjusting the relative positions of the fixed blade and the movable blade using a shim plate, etc., was easily complicated. In particular, when a plurality of movable blades are provided, such a problem was more pronounced because each of the movable blades required individual position adjustment.

[0006] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a cutting device that can easily and reliably cut an object. [Means for solving the problem]

[0007] The object of the present invention is to provide a cutting device comprising a support, a rotor supported on the support so as to be rotatable or swingable around a support shaft, a rotary blade provided on the rotor, and a fixed blade attached to the support so that the ridgelines of the rotary blade and the blade face each other, and which cuts an object between the rotary blade and the fixed blade by the rotation or swing of the rotor, wherein the ridgeline of the fixed blade extends along the axial direction of the support shaft, the ridgeline of the rotary blade is formed in a V-shape in a plan view so that a central portion along the axial direction of the support shaft protrudes in the rotational or swinging direction, and is formed in an arc shape centered on the support shaft in a side view, thereby maintaining a constant gap between the ridgelines of the rotary blade and the fixed blade during the rotation or swing of the rotor. The surface of the rotary blade is arc-shaped from the base end to the tip end of the ridge of the rotary blade in a side view. This is achieved by a cutting device.

[0008] The cutting device may further include a drive unit having an output shaft that is driven to rotate, and a rotating member having an engagement unit that rotates around the output shaft by the rotation of the output shaft, and the rotating body may include a guide unit that is supported by the support body so as to be able to swing freely, and the engagement unit engages with the guide unit so as to be able to move back and forth in a radial direction with respect to the swing center. In this configuration, it is preferable that the rotary blade cuts the workpiece at one end of the swing range of the rotating body. Effect of the Invention

[0009] According to the present invention, it is possible to provide a cutting device that can easily and reliably cut an object to be cut. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a cutting device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a main part of the cutting device shown in FIG. [Diagram 3] 3 is a perspective view of the main part shown in FIG. 2 as viewed in the direction of arrow A. [Figure 4]FIG. 3 is a plan view of the main part shown in FIG. 2. [Diagram 5] FIG. 5 is a side view of the main part shown in FIG. [Figure 6] FIG. 6 is an enlarged view of part C in FIG. 5. [Figure 7] FIG. 11 is a perspective view of a main part of a cutting device according to another embodiment of the present invention. [Figure 8] FIG. 8 is a diagram showing a state in which the cutting device shown in FIG. 7 is in operation. [Figure 9] 8 is a side view for explaining the operation of the cutting device shown in FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a perspective view of a cutting device according to an embodiment of the present invention. As shown in Fig. 1, the cutting device 1 includes a support 10 formed in a frame shape with upper and lower openings, a rotor 20 supported rotatably inside the support 10, three rotary blades 30, 40, 50 provided on the rotor 20, and a fixed blade 60 attached to the support 10 so that the ridges of the rotary blades 30, 40, 50 and the fixed blade 60 face each other. This cutting device 1 can cut an object to be cut that is supplied from above between the rotary blades 30, 40, 50 and the fixed blade 60, and discharge the object downward.

[0012] A driving unit 11 consisting of a motor is provided inside the support 10 so as to be adjacent to the rotating body 20 via a partition wall 13. The driving unit 11 drives and rotates the rotating body 20 via a drive transmission mechanism 12 consisting of a gear train. The shape of the support 10 is not particularly limited, and for example, the support 10 can be configured by providing a pair of side plates on the surface of a base plate, and the rotating body 20 and fixed blade 60 can be supported between the pair of side plates.

[0013] 2 is a perspective view of the rotor 20 and the fixed blade 60, and FIG. 3 is a perspective view of the rotor 20 and the fixed blade 60 shown in FIG. 2 as viewed in the direction of the arrow A. As shown in FIG. 2 and FIG. 3, the rotor 20 has a pair of end plates 21, 22 and support shafts 23, 24 protruding outward from the end plates 21, 22, respectively, and a support plate 25 is sandwiched and fixed between the pair of end plates 21, 22. The support shaft 23 on one end penetrates the support 10 and is connected to the drive transmission mechanism 12 shown in FIG. 1, and the support shaft 24 on the other end is rotatably supported by the support 10 shown in FIG. 1 via a bearing. The rotor 20 rotates around the support shafts 23, 24 in the direction of the arrow B.

[0014] The support plate 25 is formed in a band-like shape, extends in the axial direction of the support shafts 23, 24, and is provided at a position offset from the axis of the support shafts 23, 24. The three rotary blades 30, 40, 50 are disposed in contact with one another in the axial direction of the support shafts 23, 24, and are fixed to the outer surface of the support plate 25 by mounting bolts 26, respectively.

[0015] Fig. 4 is a plan view of the rotor 20. As shown in Fig. 4, the blade ridges 31, 41, 51 of the rotary blades 30, 40, 50 provided on the rotor 20 are formed in a V-shape in plan view such that central portions 31a, 41a, 51a along the axial directions of the support shafts 23, 24 protrude in the rotation direction B.

[0016] As shown in FIG. 2 and FIG. 3, the fixed blade 60 is arranged so that the ridge 61 of the blade extends linearly along the axial direction of the support shafts 23, 24. A minute gap is formed between the ridge 61 of the fixed blade 60 and the ridges 31, 41, 51 of the rotary blades 30, 40, 50, preventing wear due to contact between the ridges of the blades. This gap is preferably smaller than the thickness of the workpiece, and in the cutting device 1 of this embodiment, it can be easily adjusted to any extremely small clearance. The rotary blades 30, 40, 50 have cut surfaces 32, 42, 52 formed on the support shafts 23, 24 side of the ridges 31, 41, 51 of the blades, which cross obliquely at the central portions 31a, 41a, 51a, so that the workpiece can be reliably cut by the ridges 31, 41, 51 of the blades.

[0017] Fig. 5 is a side view of the rotor 20. As shown in Fig. 5, the blade ridge 51 of the rotary blade 50 is formed in an arc shape centered on the support shaft 24 in side view (the blade ridges 31, 41 of the other rotary blades 30, 40 shown in Fig. 2 and the like are similar). As a result, the gap between the blade ridges of the rotary blades 30, 40, 50 and the fixed blade 60 is maintained constant during rotation of the rotor 20.

[0018] In the cutting device 1 having the above configuration, when the rotor 20 is rotated by the drive unit 11, the blade ridges 31, 41, 51 of the rotary blades 30, 40, 50 first approach the blade ridge 61 of the fixed blade 60 at the central portions 31a, 41a, 51a, and then the approaching positions continuously move toward both sides of the central portions 31a, 41a, 51a. As a result, the material to be cut that is fed between the rotary blades 30, 40, 50 and the fixed blade 60 is cut by shearing in the axial direction of the rotor 20.

[0019] The blade ridges 31, 41, 51 of the rotary blades 30, 40, 50 are formed in a V-shape in plan view so that the central portions 31a, 41a, 51a along the axial direction of the support shafts 23, 24 protrude in the rotational direction, and are formed in an arc shape centered on the support shafts 23, 24 in side view, so that the protruding length of the blade ridges 31, 41, 51 can be suppressed to achieve a compact configuration, while the gap between the blade ridges of the rotary blades 30, 40, 50 and the fixed blade 60 can be easily maintained constant. Therefore, the cutting of the object can be easily and reliably performed with low power consumption.

[0020] The number of rotary blades attached to the rotor 20 is not particularly limited, and may be a single blade, but by providing a plurality of rotary blades 30, 40, 50 as in this embodiment, the cutting capacity per unit time can be efficiently increased. In the cutting device 1 of this embodiment, after the plurality of rotary blades 30, 40, 50 are attached to the rotor 20 having straightness, the surfaces of the rotary blades 30, 40, 50 are integrally ground into an arc shape in side view by a cylindrical grinding machine, so that the dimensional accuracy of each rotary blade 30, 40, 50 can be easily increased, and even if the gap between the ridgelines of the blades is minute, this gap can be reliably maintained.

[0021] It is possible to use multiple rotary blades 30, 40, 50 that have the same shape, but in this embodiment, the protruding length L in the rotational direction of the ridge line 51 of the blade shown in Figure 5 (the circumferential length from the base end to the tip end of the ridge line 51 in side view) is different from each other.

[0022] Fig. 6 is an enlarged view of part C in Fig. 5. As shown in Fig. 5 and Fig. 6, the ridgelines 31, 41, 51 of the blades of the rotary blades 30, 40, 50 have the same circumferential position of the base end, but are different from each other in protruding length L, and are formed so that the ridgeline 31 has the longest protruding length and the ridgeline 51 has the shortest protruding length, and the circumferential positions of the central portions 31a, 41a, 51a are different from each other. This makes it possible to differentiate the timing at which the ridgelines 31, 41, 51 approach the ridgeline 61 of the fixed blade 60 shown in Fig. 2, etc., and thus allows the cutting resistance to be distributed in the axial direction of the support shaft 24, thereby enabling stable cutting of the object to be cut.

[0023] The cutting device of the present invention can be suitably used for cutting a strip-shaped material such as a carrier tape, and by increasing the rotation speed of the rotor, the strip-shaped material fed in the longitudinal direction can be cut into small pieces in the width direction. However, the material is not necessarily limited to a strip-shaped material, and may be, for example, a sheet or film. Alternatively, the present invention can be applied to shredding thick waste such as PET bottles.

[0024] The cutting device 1 of this embodiment is configured to cut the object between the rotating blades 30, 40, 50 and the fixed blade 60 by rotation of the rotating body 20, but as described below, the cutting device can also be configured to cut the object between the rotating blades and the fixed blade by oscillation of the rotating body.

[0025] FIG. 7 is a perspective view of a main part of a cutting device according to another embodiment of the present invention. The rotating body 120 shown in FIG. 7 includes a pair of end plates 121, 122 and support shafts 123, 124 protruding outward from the end plates 121, 122, respectively, and a band-shaped support plate 125 and a reinforcing plate 126 are sandwiched and fixed between the pair of end plates 121, 122. Each support shaft 123, 124 is supported by a support body (not shown) via a bearing, and the rotating body 120 swings around the support shafts 123, 124 in the direction of arrow D. The support shafts 123, 124 may be configured to support the rotating body 120 on the support body (not shown) so as to be swingable. For example, the support shafts 123, 124 may be configured to protrude inward from the inner side of each end plate 121, 122. The support plate 125 and the reinforcing plate 126 are provided at positions offset from the support shafts 123, 124 along the axis of the support shafts 123, 124.

[0026] Support plate 125 is provided with a plurality of rotary blades 130, 140, 150, 160 having the same configuration as rotary blades 30, 40, 50 shown in Fig. 2. Edges 131, 141, 151, 161 of the blades of rotary blades 130, 140, 150, 160 face edge 171 of a fixed blade 170 that is fixed to a support (not shown) and has the same configuration as fixed blade 60 shown in Fig. 2. Rotating body 120 swings between a standby position shown in Fig. 7 and a cutting position shown in Fig. 8, whereby rotary blades 130, 140, 150, 160 cut the object to be cut between fixed blade 170 and the blades 130, 140, 150, 160 at one end of the swing range. 2, the rotary blades 130, 140, 150, 160 have blade ridges 131, 141, 151, 161 with different protruding lengths in the swing direction, and the gaps between the blade ridges of the rotary blades 130, 140, 150, 160 and the fixed blade 170 are maintained constant during swing. The number of rotary blades 130, 140, 150, 160 is not particularly limited, and may be a single blade.

[0027] 7 includes a drive unit 111 consisting of a motor fixed to a support (not shown), and a rotating member 112 attached to the output shaft of the drive unit 111. The rotating member 112 includes a pin-shaped engaging portion 112a that protrudes in the same direction as the support shaft 124, and the engaging portion 112a rotates around the output shaft when the output shaft rotates.

[0028] An elongated guide portion 122a through which the engaging portion 112a is inserted is formed on one end plate 122 of the rotating body 120. The guide portion 122a guides the engaging portion 112a so that the engaging portion 112a can reciprocate in the radial direction of the swing relative to a support shaft 124 that serves as the swing center. The guide portion 122a only needs to be capable of engaging with the engaging portion 112a, and although the guide portion 122a is a through hole in this embodiment, it may also be a groove through which the engaging portion 112a slides.

[0029] Fig. 9 is a side view for explaining the operation of the cutting device shown in Fig. 7. As shown in Fig. 7, when the rotating body 120 is in the standby position, as shown in Fig. 9(a), the entire rotating blade 160 (and the other rotating blades 130, 140, 150 shown in Fig. 7) is withdrawn from directly below the supply portion 110a of the support 110 to which the material to be cut is supplied, so that the material to be cut can be smoothly supplied between the rotating blade 160 and the fixed blade 170.

[0030] When the output shaft 111a of the drive unit 111 rotates, the rotating member 112 rotates in the direction of the arrow E, and the engagement portion 112a that engages with the guide portion 122a moves, causing the rotating body 120 to rotate in the direction of the arrow F, and as shown in Figure 9(b), the edge line 161 of the rotating blade 160 approaches the edge line 171 of the fixed blade 170.

[0031] When the rotating member 112 further rotates in the direction of the arrow E, the rotating body 120 further rotates in the direction of the arrow F, and as shown in Fig. 9(c), the rotating body 120 rotates to the cutting position, which is one end of the swing range. In this way, the object to be cut is cut between the rotating blade 160 and the fixed blade 170.

[0032] When the rotating member 112 further rotates in the direction of the arrow E, the rotating body 120 rotates in the direction of the arrow G which is the opposite direction to the direction of the arrow F, and as shown in Fig. 9(d), the rotating blade 160 moves away from the fixed blade 170. After that, when the rotating member 112 further rotates in the direction of the arrow E, the rotating body 120 rotates to the standby position which is the other end of the swing range, as shown in Fig. 9(a).

[0033] In this manner, in the cutting device shown in FIG. 7, the output shaft 111a of the drive unit 111 rotates, causing the rotating body 120 to swing between the cutting position and the swinging position, and the object to be cut can be cut at the cutting position.

[0034] As in this embodiment, the cutting of the object by the rotary blade 160 is preferably performed at one end of the swing range of the rotor 120. According to this configuration, after the object is cut, the rotary blade 160 can be quickly retracted from directly below the supply unit 110a, so that the cutting of the object can be performed reliably. [Explanation of symbols]

[0035] 1 cutting device 10 Support 20 Rotating Body 23,24 Support shaft 30,40,50 Rotary blade 31,41,51 Rotary blade edge 31a,41a,51a central part 60 fixed blade 61 Fixed blade edge 110 Support 111 Drive unit 112 Rotating parts 112a Engagement part 120 Rotating Body 122a Guide part 123,124 Spindle 130,140,150,160 Rotary blade 131,141,151,161 Rotary blade edge 170 Fixed blade 171 Fixed blade blade edge

Claims

1. A support; a rotating body supported by the support body so as to be rotatable or swingable about a support shaft; A rotary blade provided on the rotor; a fixed blade attached to the support so that the rotary blade and the blade ridges face each other, A cutting device that cuts an object between the rotary blade and the fixed blade by rotating or swinging the rotor, The ridge of the fixed blade extends along the axial direction of the support shaft, The ridgeline of the rotary blade is formed in a V-shape in a plan view so that a central portion along the axial direction of the support shaft protrudes in the direction of rotation or oscillation, and is formed in an arc shape centered on the support shaft in a side view. This allows a constant gap to be maintained between the ridgelines of the rotary blade and the fixed blade during rotation or oscillation of the rotor, A cutting device according to the present invention, wherein the surface of the rotary blade has an arc-shaped ridge from the base end to the tip end of the blade when viewed from the side.

2. The cutting device according to claim 1 , wherein a plurality of the rotary blades are provided on the rotor in an axial direction of the support shaft.

3. 3. The cutting device according to claim 2, wherein the ridges of the plurality of rotary blades have different protruding lengths in the rotation direction or the swing direction.

4. The drive unit has an output shaft that is rotationally driven, and a rotating member has an engagement portion that rotates around the output shaft by the rotation of the output shaft, The cutting device according to claim 1 , wherein the rotating body is supported by the support body so as to be freely swingable, and the engaging portion includes a guide portion which engages with the rotating body so as to be reciprocable in a radial direction with respect to a swing center.

5. 5. The cutting device according to claim 4, wherein the rotary blade cuts the workpiece at one end of a swing range of the rotor.

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