Cutting device

Abstract

To provide a cutting device that allows for easy adjustment of the fixed blade position, thereby maintaining good cutting performance and durability. [Solution] A cutting device 1 comprises a support body 10, a fixed blade 20 detachably mounted on the support body 10, and a movable blade 30 reciprocally mounted relative to the fixed blade 20, and cuts an object to be cut between the fixed blade 20 and the movable blade 30. The fixed blade 20 has a base end face 22 opposite to the cutting edge 21, with a plurality of bolt holes 23 formed at intervals in the longitudinal direction. The support body 10 has a first contact surface 12 against which the base end face 22 of the fixed blade 20 abuts, and a first insertion part 13 that opens in the first contact surface 12 and allows mounting bolts 50 to be inserted from the opposite side of the fixed blade 20. The fixed blade 20 is fixed to the support body 10 by screwing the mounting bolts 50 into each bolt hole 23 of the fixed blade 20 via the first insertion part 13.

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 carrier tape discharged from a chip mounter.

Background Art

[0002] Carrier tape discharged after electronic components are mounted on a substrate by a chip mounter is generally discarded after being cut. However, since manually cutting the carrier tape is cumbersome, cutting devices for carrier tape have been conventionally developed.

[0003] For example, the carrier tape cutting device disclosed in Patent Document 1 includes a movable blade attached to one end of a reciprocable slider, and a fixed blade facing the movable blade, and is configured to be capable of cutting by inserting the carrier tape between the movable blade and the fixed blade.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] In a configuration in which the movable blade reciprocates relative to the fixed blade, like the cutting device disclosed in Patent Document 1, if the clearance between the movable blade and the fixed blade is too large, cutting performance decreases, while if the clearance is too small, the movable blade may collide with the fixed blade and be damaged. Therefore, it is necessary to adjust the clearance of the fixed blade relative to the movable blade.

[0006] Therefore, the cutting device described in Patent Document 1 allows for adjustment of the position of the fixed blade by elastically deforming the fixing member that holds the fixed blade by screwing two bolts into the fixing member from above. However, the configuration is complicated, and it is difficult to accurately adjust the position of the fixed blade along its entire longitudinal direction.

[0007] While the position of fixed blades has traditionally been adjusted using shim plates of appropriate thickness, this method requires repeated assembly, measurement, and disassembly, resulting in a time-consuming process. This problem is particularly pronounced when multiple movable blades are present, as each corresponding fixed blade requires individual position adjustment.

[0008] Therefore, the present invention aims to provide a cutting device that can easily adjust the position of the fixed blade and maintain good cutting performance and durability. [Means for solving the problem]

[0009] The object of the present invention is achieved by a cutting device comprising a support, a fixed blade detachably provided on the support, and a movable blade reciprocally provided with respect to the fixed blade, wherein the device cuts an object to be cut between the fixed blade and the movable blade, the fixed blade having a plurality of bolt holes formed longitudinally spaced apart on the base end face opposite to the cutting edge, the support comprising a first contact surface against which the base end face of the fixed blade abuts, and a first insertion portion opening on the first contact surface through which mounting bolts can be inserted from the opposite side of the fixed blade, and the fixed blade is fixed to the support by screwing mounting bolts into each bolt hole of the fixed blade via the first insertion portion.

[0010] Preferably, the cutting device further includes a guide member detachably provided on the support so as to face the cutting edge of the fixed blade at a distance from it. The guide member has a plurality of bolt holes formed at intervals in the longitudinal direction on its base end face opposite to the side facing the fixed blade, and the support has a second contact surface against which the base end face of the guide member abuts, and a second insertion portion opening on the second contact surface through which mounting bolts can be inserted from the side opposite to the guide member, and the guide member is fixed to the support by screwing mounting bolts into each bolt hole of the guide member via the second insertion portion.

[0011] Preferably, the fixed blade has a notch formed at a position where the cutting edges of the movable blades overlap. [Effects of the Invention]

[0012] According to the cutting device of the present invention, the position of the fixed blade can be easily adjusted, thereby maintaining good cutting performance and durability. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of a cutting device according to one embodiment of the present invention. [Figure 2] Figure 1 is a plan view of the cutting device shown. [Figure 3] Figure 1 is a front view of the cutting device. [Figure 4] Figure 3 is a cross-sectional view showing an enlarged view of the main part of the PP cross-section. [Figure 5] This is a magnified view of a portion of Figure 4. [Modes for carrying out the invention]

[0014] Embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 is a perspective view of a cutting device according to one embodiment of the present invention. Figure 2 is a plan view of the cutting device shown in Figure 1, and Figure 3 is a front view of the cutting device shown in Figure 1. As shown in Figures 1 to 3, the cutting device 1 mainly comprises a support body 10, a fixed blade 20 supported by the support body, a movable blade 30, and a guide member 40.

[0015] The support 10 comprises a rectangular flat substrate 101, a guide rail 102 provided on the upper surface of the substrate 101, upright plates 103 and 104 that rise from both sides in the longitudinal direction of the substrate 101, and a plurality of sliders 105 and 106 that are arranged adjacent to each other and guided along the guide rail 102. The upright plates 103 and 104 are formed in a strip shape and are provided parallel to each other, protruding forward from the upper surface of the substrate 101.

[0016] The guide rail 102 individually guides each slider 105 and 106 so that they can move in the forward and backward direction (the X direction in Figure 1). The reciprocating motion of the sliders 105 and 106 is performed by the operation of a drive device (not shown) that combines an air cylinder or an electric motor with a link mechanism, but a manual configuration may also be used. In Figure 1, one slider 105 is shown in a retracted position at the rear, and the other slider 106 is shown in an extended position at the front.

[0017] The support 10 further comprises block-shaped first bracket 11 and second bracket 14 extending in the left-right direction (Y direction in Figure 1). The first bracket 11 and second bracket 14 are arranged parallel to each other with a gap between them in the front-rear direction, and both ends in the longitudinal direction are fixed to the upright plates 103 and 104.

[0018] The fixed blade 20 includes a linear cutting edge 21, and a plurality of fixed blades 20 are arranged corresponding to each of the sliders 105 and 106. The fixed blade 20 is arranged such that its longitudinal direction is along the first bracket 11 in a state where the cutting edge 21 faces each of the sliders 105 and 106, and is detachably fixed to the first bracket 11 by a plurality of mounting bolts 50.

[0019] The movable blade 30 includes a cutting edge 31 having an isosceles triangular shape in a plan view, three movable blades are attached to each of the sliders 105 and 106, and the movable blades are provided adjacent to each other such that each protrudes forward from the upper surface of the sliders 105 and 106. The cutting edge 31 of the movable blade 30 faces the cutting edge 21 of the fixed blade 20. When the sliders 105 and 106 advance forward, the cutting edge 31 of the movable blade 30 overlaps below the fixed blade 20, so that the workpiece to be cut is cut.

[0020] The guide member 40 is formed in a prismatic shape, and a plurality of guide members 40 are arranged corresponding to each of the sliders 105 and 106. The guide member 40 is arranged above the movable blade 30 such that its longitudinal direction is along the second bracket 14, and is detachably fixed to the second bracket 14 by a plurality of mounting bolts 50.

[0021] FIG. 4 is a cross-sectional view taken along line P-P of FIG. 3. As shown in FIG. 4, in the fixed blade 20, a bolt hole 23 having a thread groove into which the mounting bolt 50 is screwed is formed in a base end surface 22, which is a vertical surface formed on the opposite side to the cutting edge 21 in the front-rear direction. A plurality of the bolt holes 23 are formed at regular intervals in the longitudinal direction of the fixed blade 20.

[0022] The first bracket 11 includes a first contact surface 12, which is a vertical surface against which the base end surface 22 of the fixed blade 20 abuts, and a first insertion portion 13 that opens into the first contact surface 12 and allows a mounting bolt 50 to be inserted from the front side opposite to the fixed blade 20. The first insertion portion 13 is sized to allow the shaft portion of the mounting bolt 50 to be inserted with a slight gap in the vertical direction, and the front side of the first insertion portion 13 is enlarged via a stepped portion 131 so that the head of the mounting bolt 50 abuts against the stepped portion 131 and is locked in place. The first insertion portion 13 may also be configured so that the head of the bolt 50 abuts against the outer wall surface of the first bracket 11 and is locked in place, without the stepped portion 131. Furthermore, the first insertion portion 13 does not necessarily have to correspond to each mounting bolt 50 individually; for example, it may be formed as a slit extending in the longitudinal direction of the first bracket 11 so that multiple mounting bolts 50 can be inserted.

[0023] The guide member 40 has a base end face 41, which is a vertical surface formed on the side opposite to the fixed blade 20 in the front-rear direction, and a bolt hole 42 having a screw groove into which a mounting bolt 50 is screwed. Multiple bolt holes 42 are formed at regular intervals along the longitudinal direction of the guide member 40. The guide member 40 is positioned so that it overlaps with the movable blade 30 in both the retracted and extended positions.

[0024] The second bracket 14 includes a second contact surface 15, which is a vertical surface against which the base end surface 41 of the guide member 40 abuts, and a second insertion portion 16 that opens into the second contact surface 15 and allows the mounting bolt 50 to be inserted from the rear side opposite to the guide member 40. The second insertion portion 16 is sized to allow the shaft portion of the mounting bolt 50 to be inserted with a slight gap in the vertical direction, and the rear side of the second insertion portion 16 is enlarged via a stepped portion 161 so that the head of the mounting bolt 50 abuts against the stepped portion 161 and is locked in place. The second insertion portion 16 may also be configured so that the head of the bolt 50 abuts against the outer wall surface of the second bracket 14 and is locked in place, without the stepped portion 161. Furthermore, the second insertion portion 16 does not necessarily have to correspond to each mounting bolt 50 individually; for example, it may be formed as a slit extending in the longitudinal direction of the second bracket 14 so that multiple mounting bolts 50 can be inserted.

[0025] The cutting device 1 having the above configuration allows for the insertion of a strip-shaped material to be cut, such as a carrier tape, from above into the input port 60 formed between the fixed blade 20 and the movable blade 30 by retracting the sliders 105 and 106 to the retracted position, and by reciprocating the sliders 105 and 106 between the retracted position and the extended position, the material to be cut can be finely cut.

[0026] In Figure 4, when adjusting the clearance between the fixed blade 20 and the movable blade 30 (adjusting the vertical gap between the blade tips 21 and 31), first, all of the mounting bolts 50 screwed into the fixed blade 20 are loosened, and a thickness gauge or the like with the desired thickness is inserted along the entire length between the movable blade 30 in the extended position and the fixed blade 20. Then, each mounting bolt 50 is tightened to fix the fixed blade 20 to the support 10. This makes it possible to keep the minute gap between the fixed blade 20 and the movable blade 30 constant along the entire length.

[0027] As described above, in this embodiment, the cutting device 1 allows for easy and precise clearance adjustment by screwing each mounting bolt 50 into the fixed blade 20 in the front-rear direction along the horizontal plane, thereby fixing the fixed blade 20 to the support 10. This ensures good cutting performance while preventing collisions and sliding between the fixed blade 20 and the movable blade 30, thus improving durability.

[0028] Since the guide member 40 is always overlapping the reciprocating movable blade 30, it can physically suppress the lifting of the cutting edge 31 of the movable blade 30, thereby more reliably preventing collision and sliding between the fixed blade 20 and the movable blade 30. The clearance between the guide member 40 and the movable blade 30 can also be adjusted in the same manner as described above. That is, by loosening all of the mounting bolts 50 screwed into the guide member 40, inserting a thickness gauge or the like with a desired thickness between the movable blade 30 and the guide member 40 along its entire length, and then tightening each mounting bolt 50, the minute gap between the movable blade 30 and the guide member 40 can be made constant along its entire length.

[0029] The gap between the fixed blade 20 and the movable blade 30, which is set by clearance adjustment, is preferably about the same as the gap between the movable blade 30 and the guide member 40, or slightly larger than the gap between the movable blade 30 and the guide member 40. For example, the gap between the fixed blade 20 and the movable blade 30 is 30 to 50 μm, and the gap between the movable blade 30 and the guide member 40 is 20 to 30 μm.

[0030] To reliably prevent the cutting edge 31 from sliding against the fixed blade 20 when the movable blade 30 extends, a notch 24 may be formed on the lower surface of the fixed blade 20 at a position where the movable blade 30 overlaps, as shown in Figure 5. The notch 24 is formed in a band shape along the entire longitudinal direction of the fixed blade 20, on the side in front of the cutting edge 21.

[0031] As in this embodiment, when multiple movable blades 30 are reciprocated with respect to a single fixed blade 20, the cutting timing of each movable blade 30 can be varied by slightly shifting the tip positions of each movable blade 30 in the front-to-back direction, or by tapering the thickness of the fixed blade in the front-to-back direction along its entire longitudinal direction, thereby distributing the cutting resistance in the left-to-right direction and enabling stable cutting of the workpiece. However, the number of fixed blades 20 and movable blades 30 is not particularly limited, and both may be single.

[0032] The cutting device of the present invention can be suitably used for cutting strip-shaped materials such as carrier tapes. However, the material to be cut is not necessarily limited to strips, and may be, for example, sheet-shaped or film-shaped. Alternatively, the present invention can also be applied to shredding waste materials with thickness, such as PET bottles. [Explanation of symbols]

[0033] 1 cutting device 10 Support 11 First bracket 12 First contact surface 13. First insertion section 14. Second bracket 15 Second contact surface 16. Second insertion section 20 Fixed blade 21 cutting edge 22 Proximal surface 23 bolt holes 24 Notch 30 Movable blade 31 cutting edge 40 Guide member 41 Proximal surface 42 bolt holes 50 Mounting bolts

Claims

1. A cutting device comprising a support, a fixed blade detachably mounted on the support, and a movable blade reciprocally mounted relative to the fixed blade, wherein the device cuts an object to be cut between the fixed blade and the movable blade, The aforementioned fixed blade has multiple bolt holes formed at intervals in the longitudinal direction on the base end face opposite to the cutting edge. The support comprises a first contact surface against which the base end surface of the fixed blade abuts, and a first insertion portion that opens into the first contact surface and allows a mounting bolt to be inserted from the opposite side of the fixed blade. A cutting device in which the fixed blade is fixed to the support by screwing mounting bolts into each bolt hole of the fixed blade via the first insertion portion.

2. The support further comprises a guide member that is detachably provided on the support so as to face the cutting edge of the fixed blade at a distance from it, The guide member has multiple bolt holes formed at intervals in the longitudinal direction on its base end face opposite to the side facing the fixed blade. The support comprises a second contact surface against which the base end surface of the guide member abuts, and a second insertion portion that opens into the second contact surface and allows a mounting bolt to be inserted from the side opposite to the guide member. The cutting device according to claim 1, wherein the guide member is fixed to the support by screwing mounting bolts into each bolt hole of the guide member via the second insertion portion.

3. The cutting device according to claim 2, wherein the fixed blade has a notch formed at a position where the cutting edges of the movable blade overlap.

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