JP2011016218A - Cutting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting apparatus which facilitates attachment of a cutting blade, and has high durability and achieves stable high quality cutting even when a cutting object is a soft material or thin material.SOLUTION: The cutting apparatus includes the cutting blade 18 such as a Thompson blade; and a cutting drive device 50. The cutting apparatus further includes a holding member 20 for positioning the cutting blade 18; a fixing member 30 which is disposed opposite to a side surface formed in the holding member 20, and holds the cutting blade 18 therebetween; set screws 32a and 32b for fixing the cutting blade 18 by pressing the fixing member 30 against the side surface of the holding member 20; and a blade receiving portion 24 against which the cutting edge 18a of the cutting blade 18 abuts. The blade receiving portion 24 is made up of an elastic rubber body 44, and a metal receiving member 46 disposed on the surface of the elastic rubber body 44.

Description

  The present invention relates to a cutting device for cutting an object to be cut such as a synthetic resin by a pressing operation.

  Conventionally, as a cutting blade used in a cutting apparatus, a Thomson blade is used when cutting paper or a thin plastic sheet. This Thomson blade is used by inserting the base end portions of a plurality of blades into a plywood plate and fixing them to a predetermined blade shape.

  In addition, when cutting an injection-molded resin molded product from the runner to adjust the outer shape of the product, or when cutting a surface fastener or the like using a resin cloth material into a desired shape, the cutting blade and the cutting edge of the cutting blade are vertical. A cutting device having a blade receiving surface in contact with the blade is used.

  As an apparatus having this type of cutting function, for example, as disclosed in Patent Document 1, a molding unit that molds a heat-softened thermoplastic sheet into a predetermined shape, and a molded product molded by the molding unit are unnecessary. And a cutting and trimming device configured to cut the unnecessary portion by pressing the cutting blade against a resin or metal receiving plate.

  Further, as disclosed in Patent Document 2, a cutting device for cutting a card base into individual card shapes, and a blade receiving surface against which a cutting blade is pressed is made of polyurethane rubber having a rubber hardness of 70 to 80. And an information recording medium cutting device formed in a two-layer structure of a surface layer made of polyurethane rubber having a rubber hardness of 90 to 95 degrees.

JP 2004-9698 A Japanese Patent Laid-Open No. 1-289700

  However, the conventional general Thomson blade is only inserted and fixed into the slit of the plywood plate, and has a problem that the waist is weak, the position of the blade edge varies, and the cutting accuracy is poor. Therefore, it cannot be used for an object to be cut that needs to be positioned and cut with high accuracy.

  On the other hand, the cutting means of the molding trimming apparatus disclosed in Patent Document 1 has a higher cutting blade positioning accuracy than the conventional Thomson blade, but when the receiving plate is made of resin, the cutting edge of the cutting blade bites into the receiving plate surface. Thus, there is a problem that a cutting edge-shaped biting portion is formed on the backing plate, and shavings are generated, or in the case of a thin cut object, the cutting object enters the biting portion and an uncut portion tends to occur.

  In addition, when the backing plate is made of metal, there is no significant biting into the backing plate of the cutting blade, so there is no chipping. However, if the bottom dead center of the cutting blade interferes with the backing plate, Sag and wear are likely to occur. For this reason, conventionally, a stopper member is provided at a position where the cutting blade driven by a hydraulic cylinder or the like just contacts the receiving plate to set the bottom dead center of the cutting blade. However, the adjustment of the position of the stopper member and bottom dead center takes man-hours, and the load applied to the cutting blade is large, and the life of the cutting blade is short. Furthermore, the impact when the stoppers collide with each other is large, and the noise during operation is also large. In particular, when the object to be cut is a thin material such as a base material of a hook-and-loop fastener, uncut portions are easily generated, and it is difficult to adjust the position of the thin material so as to be surely cut.

  Furthermore, the mounting of the Thomson blade, which is the cutting blade of Patent Document 1, has variations in the dimensional accuracy of the Thomson blade itself and is fixed to the table mounting portion by hitting the blade tip with a hammer. Sag and deformation of the cutting edge occurred. Furthermore, since the blade tip is tilted and attached, the position of the blade tip is tilted, so that accurate position setting cannot be performed, and precise adjustment of the bottom dead center of the cutting blade is not possible. In addition, since it is attached by hitting as described above, it is impossible to accurately align the cutting edge positions of a plurality of Thomson blades, and in order to protect the cutting edges, the backing plate must be made of a material softer than the cutting edges. It was not obtained.

  Further, in the case of the information recording medium cutting device disclosed in Patent Document 2, when the cutting edge of the cutting blade presses the blade receiving surface through the workpiece during cutting, the blade receiving surface is formed of rubber. The object to be cut is less likely to receive the blade receiving surface while being deformed into a substantially V shape with the portion where the blade edge comes into contact as the apex. Therefore, for example, when cutting a thin resin molded product, due to variations in the deformation of the blade receiving surface at the time of cutting, the cutting position where the blade edge bites is displaced, or burrs and sags remain on the cut surface, resulting in a clean finish. There is a problem that dimensional accuracy and cutting quality become unstable, such as no cutting or uncut portions due to biting.

  Furthermore, by using a material softer than the cutting edge for the backing plate, in the portion where the V-groove is formed due to the bite, the thinner the material, the easier it is to leave uncut parts, the more chips are generated, and the cause of product defects It was. Further, since the cutting blade bites into the receiving surface of the backing plate, the life of the backing plate is short and the replacement frequency is high, so that the maintenance time can be taken.

  The present invention has been made in view of the above-mentioned background art, is easy to attach a cutting blade, has high durability, and can stably cut with high quality even if the material to be cut is a soft material or a thin material. An object is to provide a possible cutting device.

  The present invention is a cutting device including a cutting blade such as a Thomson blade and a driving device for the cutting blade, and is opposed to a holding member for positioning the cutting blade and a side surface formed on the holding member. It is a cutting device provided with the fixing member which clamps the said cutting blade, and provided with the pressing member which presses the said fixing member with respect to the side surface of the said holding member, and fixes the said cutting blade.

  The holding member includes an accommodation hole larger than the cutting blade, the cutting blade is accommodated in the accommodation hole, and the cutting blade is formed by the fixing member provided in the accommodation hole and an inner surface of the accommodation hole. The cutting blade is fixed via the fixing member by being clamped and pressing the fixing member toward the cutting blade in the holding member by a set screw which is the pressing member.

  The holding member includes a side surface formed in the shape of the cutting blade, presses the cutting blade against the side surface, and fixes the shape of the cutting blade according to the shape of the side surface.

  The cutting edge of the cutting blade is formed in a closed annular shape, the holding member is divided into a plurality, and the annular cutting edge is fixed to a surface formed by the side surfaces of the plurality of holding members. .

  Further, the cutting blade is provided with a movable part of the cutting device and a fixed part facing the movable part with the blade edges facing each other, and the cutting blade fixed to the movable part is attached to the fixed part. Even in a state of being closest to the fixed cutting blade, the blades may be provided so as to be able to reciprocate without contacting the blade edges.

  The cutting edge of the cutting blade may be slightly inclined with respect to the surface of the fixed portion of the cutting device facing the cutting blade.

  Further, a plurality of the cutting blades may be provided, and a plurality of the holding members may be provided corresponding to the cutting blades.

  Further, the present invention includes a blade receiving portion provided so that the cutting blade can come into contact with the cutting blade at a position facing the cutting blade, and the blade receiving portion includes a sheet-like elastic rubber body and the elastic rubber. A metal receiving member disposed on the surface of the body, and the metal receiving member is a cutting device made of a hard metal material equivalent to or higher than the cutting blade.

  The elastic rubber body can generate an elastic force larger than the cutting resistance of the object to be cut by the cutting blade, and when the cutting blade presses the surface of the metal receiving member through the object to be cut, When the metal receiving member moves parallel to the plate thickness direction by the compression generated in the elastic rubber body and temporarily moves in the pressing direction, and the elastic force due to the compression of the elastic rubber body becomes larger than the cutting resistance of the workpiece. The compression of the elastic rubber body is restored, and the cutting edge of the cutting blade cuts the workpiece.

  The cutting blade is fixed to the holding member, and the position of the bottom dead center of the cutting edge of the cutting blade is below the blade receiving surface of the surface of the blade receiving portion, and the elastic rubber body can be elastically deformed. It is located within the range.

  Furthermore, the line of the cutting edge of the cutting blade may be located on a surface slightly inclined with respect to the blade receiving surface facing the cutting blade.

  Further, a plurality of the cutting blades may be provided, and the metal receiving member of the blade receiving portion may be provided by being divided into a plurality corresponding to each cutting blade.

  The elastic rubber body has a rubber hardness of 85 to 95 degrees and a thickness of about 1 to 5 mm.

  In the cutting apparatus of the present invention, since the cutting blade is attached by the holding member and the fixing member and fixed by the pressing member, the cutting blade is accurately positioned, enabling high-precision cutting and cutting. Cutting can be performed accurately over a long period of time without damaging the cutting edge of the blade.

  Furthermore, by fixing the blade edge so as to follow the side surface of the holding member, an accurate blade edge shape can be maintained and precise and clean cutting can be performed.

  Further, by providing the cutting blades to face each other, the object to be cut can be cut from both sides, and the object to be cut can be cut more clearly without being cracked.

  Further, by providing the cutting blade with a slightly inclined blade edge, a hard object can be easily and cleanly cut.

  Also, a blade receiving portion is provided facing the cutting blade, and the blade receiving portion has a two-layer structure of an elastic rubber body and a metal receiving member, so that the dimensional error and mounting error of the cutting blade can be reduced by the elastic rubber body. And the metal receiving member eliminates biting into the blade receiving portion of the cutting blade, and the object to be cut can be cut cleanly and reliably. Furthermore, when the cutting edge of the cutting blade presses the blade receiving portion through the workpiece during cutting, the elastic rubber body is slightly elastically deformed, reducing the impact load applied to the cutting edge and suppressing damage to the cutting edge. Prevents scratches and cracks from occurring. Furthermore, the impact sound can be reduced. Thereby, the lifetime of a cutting blade can be extended significantly.

  In addition, the metal receiving member does not deform even when pressed by the cutting blade and maintains a flat shape, so the shape of the cutting part is deformed even if it is a thin object made of synthetic resin or the like. do not do. Therefore, the cutting can always be performed at an accurate cutting position, and a clean cut surface can be obtained. In particular, when the hardness of the metal receiving member is equal to or higher than that of the cutting blade, the life of the metal receiving member becomes semi-permanent, and coupled with the long life of the cutting blade, the maintenance of the cutting device can be greatly simplified. it can.

  Further, when the metal receiving member moves slightly in the pressing direction due to the pressing of the cutting edge of the cutting blade, the elastic force of the elastic rubber body is generated in the direction to push it back. Therefore, the object to be cut is sandwiched between the pressure by the blade edge and the elastic force received from the metal receiving member, and the object to be cut once rises slightly with respect to the position of the edge of the cutting blade, and the cutting proceeds. As a result, reliable cutting is performed, and burrs and sagging are not left on the cut surface, and the cutting is performed satisfactorily.

It is a partially broken front view which shows the cutting device of 1st embodiment of this invention. It is a top view which shows the base member and blade receiving part of the cutting device of 1st embodiment of this invention. It is the top view (a) which shows the cutting blade part of 1st embodiment of this invention, a right view (b), and a front view (c). It is the top view (a) and right view (b) which show the fixing member of the cutting blade part of 1st embodiment of this invention. It is AA sectional drawing of FIG. 3 which shows the internal structure of the cutting blade part of 1st embodiment of this invention. It is BB sectional drawing of FIG. 3 which shows the internal structure of the cutting blade part of 1st embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows the middle of the operation | movement which 1st embodiment of this invention cut | disconnects a to-be-cut object. It is a schematic longitudinal cross-sectional view which shows operation | movement which 1st embodiment of this invention cut | disconnects a to-be-cut object. It is a front view which shows the cutting device and drive device of 1st embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows the cutting device of 2nd embodiment of this invention. It is a top view which shows the state holding the cutting blade of the cutting device of 2nd embodiment of this invention. It is a perspective view which shows the state holding the cutting blade of the cutting device of 2nd embodiment of this invention. It is a perspective view which shows the cutting blade of the cutting device of 2nd embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows the state which shows the cutting device of other embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows the state which shows the cutting device of further another embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows the state which shows the cutting device of further another embodiment of this invention. It is a front view which shows the state which shows the cutting device of further another embodiment of this invention.

  Hereinafter, the cutting device 10 of 1st Embodiment of this invention is demonstrated based on FIGS. The cutting device 10 is a resin molded body of a thin plate-like product 12a formed by an injection molding device, and cuts off four runners 12b extending from the side end surface of the product 12a portion of the workpiece 12 with the runner 12b attached. This is a device for adjusting the outer shape of the product 12a. As shown in FIGS. 1 and 2, the cutting device 10 is positioned above the base 14 with the base 14 having a fixed position and the same size as the base 14, and is driven up and down by a driving device (not shown). The elevating member 16 is provided.

  A cutting blade 18 protruding toward the base 14 side is attached to the lower surface side of the elevating member 16. The cutting blade 18 is inserted into a block-shaped holding member 20 fixed to the lower surface of the elevating member 16, and is held vertically protruding downward by a set screw 32a or the like described later. A pair of pressing members 17 for pressing the product 12a from above are attached to the positions of the pair of horizontal ends of the elevating member 16 and avoiding the cutting blade 18. The pressing member 17 is provided so as to be contractible by the coil spring 19 and presses the product 12a and the runner 12b before and after cutting the runner 12b.

  On the upper surface of the base 14, a blade receiving portion 24 with which the tip of the cutting blade 18 abuts vertically is provided. The blade receiving portion 24 has a metal base member 42 having a predetermined thickness and fixed to the base 14, and a sheet-like elasticity laid in a recess 42 a dug into a rectangular shape on the upper surface of the base member 42. A rubber body 44 and a metal receiving member 46 disposed in contact with the flat upper surface of the elastic rubber body 44 are provided. The elastic rubber body 44 and the metal receiving member 46 are accommodated in the recess 42 a of the base member 42, and the surface of the metal receiving member 46 and the surface of the base member 42 are set to be flush with each other and are fixed by bolts 48. As will be described later, the metal receiving member 46 and the like of the blade receiving portion 24 are fixed to the base member 42 independently for each of the plurality of cutting blades 18.

  As shown in FIGS. 1 and 2, stoppers 28a are projected at four positions on the periphery of the base 14 and closer to the center than the four corners. Projected. The positions where the stoppers 28a and 28b abut are positions where the elevating member 16 is lowered until the cutting blade 18 abuts against the surface of the metal receiving member 46 and the elastic rubber body 44 is slightly compressed as will be described later. Further, guide projections 25 for raising and lowering guides are fixed to the four corners of the base 14, and guide bushes 26 having guide recesses 26 a into which the guide projections 25 are fitted are attached to the lower surfaces of the opposing raising and lowering members 16. ing.

  As shown in FIG. 2, a rectangular parallelepiped rod-like positioning member 43 fixed in the vicinity of the three side edges on the base 14 is fixed to the base 14 in parallel with each side. On the positioning member 43 parallel to the long side of the base 14, the side surfaces on the long side of the two base members 42 are fixed by bolts 45. Furthermore, two base members 42 fixed to the positioning member 43 on the long side are fixed to the pair of positioning members 43 parallel to the short side of the base 14 by bolts 45, respectively. The other two base members 42 fixed to the positioning member 43 on the short side are fixed with bolts 45 so that they can be aligned by long holes 43 a formed in the positioning member 43 on the short side. A thin spacer (not shown) for alignment is inserted into the gap along the long side between the base members 42, and the pair of base members 42 can be positioned using the long holes 43a. . Further, on the base member 42, a positioning pin 41 is provided so as to fit into a positioning hole formed in the runner 12b of the workpiece 12 that is a pair of resin molded products, so that the workpiece 12 is accurately positioned. It is provided so that it can be mounted.

  Here, as a drive device for driving the elevating member 16, as shown in FIG. 9, a device using a slider and a crank mechanism is preferable. As a result, the lowering speed gradually decreases and stops near the bottom dead center of the elevating member 16, and the impact when the cutting blade 18 and the metal receiving member 46 come into contact with each other is small.

  Hereinafter, the cutting drive device 50 for driving the elevating member 16 will be described with reference to FIG. The cutting drive device 50 of this embodiment is a device using a pair of toggle mechanisms 52 and 54 on the left and right, and a drive motor 56 that performs a cutting operation is provided at the center. An interlock mechanism such as a chain (not shown) is connected to the drive shaft of the drive motor 56, and an eccentric cam 60 that rotates to move the toggle mechanisms 52 and 54 is connected to the interlock mechanism.

  The eccentric cam 58 is provided with swing pins 61 and 22 on the opposite sides of the disk by 180 °, and the swing pins 61 and 62 have one ends of a pair of crank arms 63 and 64 arranged in the horizontal direction. Is supported. The other end of the crank arm 63 is pivotally supported by the swing connection pin 71 at one end of each toggle arm 65, 66 of the toggle mechanism 52, and the other end of the crank arm 64 is connected to each toggle arm of the toggle mechanism 54. 67 and 68 are pivotally supported by the swing connecting pin 72 at one end. The other end portions of the toggle arms 65 and 67 are pivotally supported by fixing pins 73 and 74 provided on the main body 70 of the cutting drive device 50, respectively. Further, the other end portions of the other toggle arms 66 and 68 are respectively connected to the base end portions of the position detecting interlocking members 75 and 76 located on the side of the main body 70 of the cutting drive device 50, 78 is supported by each shaft. The interlocking members 75 and 76 are arranged in the vertical direction, and slide up and down while being guided by a fixing member (not shown) of the frame-shaped main body 70.

  The raising / lowering member 16 is fixed to the lower surface of the raising / lowering mounting board 80 located in the upper part of the cutting drive apparatus 50, is guided up and down by the guide member 82, and is provided so that it can reciprocate with a predetermined stroke. The elevating member 16 is fixed so as to be horizontal with respect to the elevating mounting plate 80, and the elevating mounting plate 80 is also fixed to the interlocking members 75 and 76 so as to be accurately positioned horizontally.

  A sliding base 86 to which the base 14 is attached is provided horizontally at a facing position below the elevation mounting board 80. Two slide rails 88 are fixed to the lower surface of the sliding base 86 in the front-rear direction with respect to the main body 70 in parallel with each other. Linear sliders 90 are slidably attached to the slide rails 88, and a sliding base 86 is fixed on the linear sliders 90 and faces the lifting attachment board 80. The sliding base 86 is provided so as to be able to reciprocate between the retracted position moved to the front side of the main body 70 and the lower surface of the lifting attachment board 80.

  Further, the interlocking member 75 that is interlocked with the movement of the lifting / lowering mounting board 80 is provided with a contact member 92 that moves integrally therewith. The abutting member 92 abuts on the probe 96 of the linear position sensor 94 and is provided so that the probe 96 can be pushed down. The linear position sensor 94 electrically detects position information due to the movement of the probe 96, converts the position information of the lifting / lowering mounting board 80 into an electric signal, and outputs it to a control device (not shown).

  In addition, a hydraulic cylinder or an air cylinder may be used as the cutting drive device. In this case, the collision position of the tips of the stoppers 28a and 28b is the stop position of the elevating member 16, and the cutting is performed by adjusting the position thereof. The position of the bottom dead center of the blade tip of the blade 18 and the surface of the metal receiving member 46 can be adjusted.

  Next, the structure of the cutting blade part 22 and the blade receiving part 24 is demonstrated. In this embodiment, as shown in FIG. 3, the cutting blade portion 22 includes four cutting blades 18 corresponding to the four gate portions of the workpiece 12. The four cutting blades 18 are formed by cutting each cutting blade 18 into the same shape from a long Thomson blade formed of the same blade steel material. Each of the cutting blades 18 is formed with a constant height from the root to the cutting edge, but strictly speaking, has a certain dimensional error, and is fixed to the holding member 20 by an attachment error or the like, and is lifted and lowered. For example, an error of about ± 8 μm is generated at the cutting edge position. Further, the cutting blade 18 has a slightly curved shape in accordance with the cutting shape required for the four runners of the workpiece 12.

  The holding member 20 is a metal block body and is provided with four accommodation holes 34 penetrating in a substantially rectangular shape capable of accommodating a substantially cubic fixing member 30 for fixing the cutting blade 18. One side surface of the inner wall of the accommodation hole 34 is an abutting surface 34 a with which one side surface of the cutting blade 18 abuts, and has a curved surface shape similar to that of the cutting blade 18. In addition, a screw hole 36 into which a set screw 32a, 32b as a pressing member is screwed is provided at the center of the back surface 34b facing the contact surface 34a. Further, the screw hole 36 is coaxially continuous from the set screw 32b. A relief hole 38 having a large inner diameter is provided and penetrates to the side surface of the holding member 20.

  As shown in FIG. 4, the fixing member 30 is a member that clamps and fixes the cutting blade 18 so as to abut one side surface of the cutting blade 18 and press the opposite side surface against the abutting surface 34 a of the accommodation hole 34. The contact surface 30 a contacts the side surface of the cutting blade 18. As shown in FIG. 3, the abutting surface 30 a has a surface shape curved like an arc like the cutting blade 18. Further, a fixing hole 30b in which about half of the set screw 32a is dug so as to be fitted is provided in the center of the wall surface facing the contact surface 30a.

  The cutting blade portion 22 is configured by assembling the cutting blade 18 to the holding member 20, and as shown in FIG. 5, the holding member 20 is first placed on the surface plate 40, and the fixing member 30 is accommodated in the receiving hole 34 of the holding member 20. Housed inside. Next, the set screw 32a is inserted from the escape hole 38 of the holding member 20, and fitted into the fixing hole 30b. At this time, the set screw 32a is shorter than the screw hole 36 of the holding member 20 and is positioned in the screw hole 36, and the distal end portion is inserted into the fixing hole 30b, but the fixing member 30 is not fixed. Next, the fixing member 30 is moved to the back surface 34b side of the accommodation hole 34, and the cutting blade 18 is inserted from the root side into the gap between the accommodation hole 34 and each contact surface 34a, 30a of the fixing member 30, and the root is fixed on the surface plate. 40 abuts. Thereby, the height of the cutting edge of the cutting blade 18 is configured to be constant. In this state, the set screw 32 a is rotated to press the fixing member 30 toward the cutting blade 18. Thereby, the cutting blade 18 is sandwiched and fixed between the contact surface 34 a of the accommodation hole 34 and the contact surface 30 a of the fixing member 30. Further, a short set screw 32 b is inserted from the escape hole 38 of the holding member 20 and screwed into the screw hole 36. The set screw 32b is screwed into the screw hole 36 and advanced to the back, and the back end of the set screw 32a is pressed with the tip of the set screw 32b to prevent the set screws 32a and 32b from loosening. As described above, as shown in FIGS. 5 and 6, the cutting blade 18 is sandwiched between the housing portion 34 and the contact surfaces 34 a and 30 a of the fixing member 30 and is securely fixed. The other three cutting blades 18 are attached in the same manner as shown in FIG.

  In the cutting blade portion 22 assembled in this way, the four cutting blades 18 are arranged at positions corresponding to the cutting portions of the four runners 12 b of the workpiece 12, and each cutting edge 18 a is the upper side of the holding member 20. Projecting to each other by the same length. As shown in FIG. 1, the cutting blade portion 22 is disposed with the cutting edge 18 a of the cutting blade 18 facing downward, and is attached to the lower surface of the elevating member 16.

  The blade receiving surface 46a, which is the surface of the metal receiving member 46 of the blade receiving portion 24, is a metal material having the same hardness as that of the cutting blade 18, preferably a harder metal, for example, hardened steel having an HRC hardness of about 50 degrees. Various steel materials mainly composed of iron are suitable. The outer shape has a size corresponding to each of the four cutting blades 18 attached to the cutting blade portion 22. Two through holes are formed in the metal receiving member 46, and a bolt 48 fixed to the base member 42 is formed so as to be able to be inserted into the through hole. Further, a large diameter portion is formed in the through hole of the metal receiving member 46 so that the head portion of the bolt 48 does not protrude, and the head surface of the bolt 48 is lower than the surface of the metal receiving member 46 in the assembled state. To position.

  The elastic rubber body 44 has, for example, a hardness of about 90 degrees, and here, urethane rubber that is excellent in terms of mechanical strength and wear resistance is used. The outer shape is almost the same size as the metal receiving member 46. A through hole through which the bolt 48 is inserted is formed. If the elastic rubber body 44 is too soft or too thick, the sinking of the metal receiving member 46 becomes large and the cutting sharpness is deteriorated. If the elastic rubber body 44 is too hard or too thin, the cutting edge of the cutting blade 18 is easily chipped. Occurs. Accordingly, although it is appropriately set depending on the material to be cut, it is preferable to select a sheet-like thin material having a rubber strength of 85 to 95 degrees and a thickness of 5 mm or less, preferably 1 to 2 mm. Further, the amount of the metal receiving member 46 that sinks due to the compression of the elastic rubber body 44 due to the pressing by the cutting blade 18 is a slight amount of about 0.1 mm to 0.3 mm, for example.

  In assembling the blade receiving portion 24, first, four elastic rubber bodies 44 are laid in the recess 42a on the upper surface of the base member 42, and four metal receiving members 46 are placed on the upper surface. Then, each elastic rubber body 44 and each metal receiving member 46 are fixed by bolts 48. As shown in FIG. 2, the blade receiving portion 24 is disposed on the upper surface of the base 14 with the metal receiving member 46 facing upward, and is attached directly below the position where the cutting blade 18 is attached. The position of the bottom dead center of the cutting blade 18 tip and the surface of the blade receiving portion 24 are adjusted so that the bottom dead center of the cutting blade 18 tip is slightly below the blade receiving surface 46 a which is the surface of the blade receiving portion 24. To do. This minus amount is about the amount by which the elastic rubber body 44 is elastically deformed.

  Next, the operation of the cutting drive device 50 of this embodiment will be described. The cutting blade 18 is attached to the elevating member 16, and the elevating member 16 is fixed to the elevating attachment board 80. Further, the base 14 to which the blade receiving portion 24 is attached is set on the sliding base 86. And the position of the lowest end of the raising / lowering mounting board 80 is set by the control apparatus which is not shown in figure. The position of the lowermost end is not necessarily the bottom dead center of the cutting blade 18 by the toggle mechanisms 52 and 54, but is a position in front of the vicinity of the bottom dead center. It can be arbitrarily set by the position sensor 94 and the control device.

  Then, the drive motor 56 rotates to move the positions of the swing pins 71 and 72, and the horizontal positions of the crank arms 63 and 64 gradually move away from each other. At the same time, the pair of toggle arms 65 and 66 and the toggle arms 67 and 68 of the toggle mechanisms 52 and 54 are swung so as to increase the angle between them, and the swing connecting pins 77 and 78 of the toggle arms 66 and 68 are swung. Moves downward, and the intervals between the swing connection pins 73 and 77 of the toggle arms 65 and 66 and the toggle arms 67 and 68 and between the swing connection pins 74 and 78 are increased.

  Thereby, the raising / lowering mounting board 80 moves below via the interlocking members 75 and 76. At the same time, the abutting member 92 that moves integrally with the interlocking member 75 moves downward, abuts against the probe 96 and pushes down the probe 96, and position information is output from the linear position sensor 94 to the control device as an electrical signal. The moving speeds of the interlocking members 75 and 76 at this time are substantially the same in the vicinity of the bottom dead center of the cutting drive device 50 when the angle of the eccentric cam 60 is 0 ° when the cutting drive device 50 is at the top dead center. 180 °. The moving speed of the oscillating connecting pin 77 is proportional to approximately the square of the sin value of the angle of the eccentric cam 60 due to the geometric configuration of the crank arms 63 and 64 and the toggle arms 75, 76, 77 and 78. When the rotation angle of the eccentric cam 60 is around 180 °, the interlocking members 75 and 76 move in the vertical direction at a very low speed with respect to the rotation speed of the eccentric cam 60. Therefore, by detecting the position by the linear position sensor 94 and stopping the motor 56, extremely precise position control is possible. As a result, as will be described later, the motor 56 is stopped by the control device at an arbitrary setting position slightly below the blade receiving surface 46a of the metal receiving member 46 and before the bottom dead center, and a satisfactory cutting operation is performed. be able to.

  Next, the operation in which the synthetic resin cutting device 10 cuts the runner 12b of the workpiece 12 will be described. First, the workpiece 12 is placed on the metal receiving member 46 of the base plate 42, and the workpiece 12 is positioned in the horizontal direction by the guide pins 41. When the driving device is operated, the cutting blade portion 22 is lowered together with the elevating member 16, and the cutting edge of the cutting blade 18 comes into contact with the upper surface of the cutting portion 12c of the workpiece 12 as shown in FIG. In this state, the cutting blade 18 does not press the workpiece 12 and the metal receiving member 46, and the thickness of the elastic rubber body 44 is the initial value ta.

  When the cutting blade portion 22 is further lowered from the state of FIG. 7, the cutting edge of the cutting blade 18 presses the upper surface of the cutting portion 12c, and the cutting progresses gradually. At the same time, the pressing force is transmitted to the elastic rubber body 44 through the metal receiving member 46 to elastically compress the elastic rubber body 44, and the metal receiving member 46 moves downward. The metal receiving member 46 does not deform even when it receives a pressing force from the cutting edge of the cutting blade 18, and the pressing force is transmitted evenly distributed on the upper surface of the elastic rubber body 14. Accordingly, the metal receiving member 46 translates downward, and the workpiece 12 on the metal receiving member 46 can also maintain a flat shape. Further, when the elastic rubber body 44 is elastically deformed by the pressing force transmitted through the metal receiving member 46 due to the lowering of the cutting blade 18, the elastic force that increases in proportion to the compression amount of the elastic rubber body 44 is increased. The cutting proceeds by this elastic force.

  Even when the cutting progresses and the position of the cutting blade 18 is located near the bottom dead center, the elastic rubber body 44 is elastically deformed in a compressed state, and the cut object 12 is slightly lowered. Due to the compression of the rubber body 44, a force that returns upward is applied to the metal receiving member 46, and along with the restoration of the elastic rubber body 44, the metal receiving member 46 rises and the interval between the cutting blade 18 and the cutting edge narrows. Progresses. Therefore, the elasticity of the elastic rubber body 44 must be such that when the cutting with the cutting blade 18 is performed, a resilient force capable of cutting the workpiece 12 can be obtained by the resilient force when the elastic rubber body 44 is compressed. Don't be. That is, the elasticity of the elastic rubber body 44 can generate an elastic force larger than the cutting resistance of the workpiece 12. Then, as shown in FIG. 8, the cutting edge of the cutting blade 18 comes into contact with the blade receiving surface 46a which is the upper surface of the metal receiving member 46, and the cutting of the cutting portion 12c is completed. At this time, the cutting edge of the cutting blade 18 is in contact with the metal receiving member 46 in the vicinity of the bottom dead center, and the thickness of the elastic rubber body 44 is set to the initial value ta with the cutting blade 18 slightly raised from the bottom dead center. Return.

  As described above, the cutting blade 18 composed of a Thomson blade is not attached to the base plate by hitting the cutting edge of the cutting blade 18 with a hammer as in the prior art. Therefore, the alignment can be performed accurately. In addition, the replacement work of the cutting blade 18 is easy.

  Further, the cutting device 10 has a two-layer structure in which the blade receiving portion 24 is composed of an elastic rubber body 44 and a metal receiving member 46 disposed on the surface thereof, and is divided into metal receiving portions corresponding to the respective cutting blades 18. Since the member 46 is provided, when the cutting edge of the cutting blade 18 presses the upper surface of the metal receiving member 46 through the workpiece 18 at the time of cutting, each elastic rubber body 44 is slightly elastically deformed, and the metal receiving member 46 is cut into the cutting blade 18. The surface of the metal receiving member 46 comes into contact with each of the cutting edges almost evenly even with a slight deviation in the position of the cutting edge or a shape error. As a result, it is possible to absorb the stress that some of the cutting blades 18 are missing, and similarly, it is possible to prevent the surface of the metal receiving member 46 from being scratched or cracked. The service life can be greatly extended.

  Moreover, since the metal receiving member 46 maintains the original shape even when the cutting blade 18 is pressed, the workpiece 12 is not deformed into a V shape at the cutting portion 12c. Therefore, cutting can be performed at an accurate cutting position, and a clean cut surface can be obtained.

  Further, when the metal receiving member 46 is moved downward by the pressing force of the cutting edge of the cutting blade 18, the elastic force of the elastic rubber body 44 is generated in the direction in which the metal receiving member 46 is pushed back. Accordingly, the workpiece 12 is sandwiched between the pressing force by the blade edge and the elastic force received from the metal receiving member 46, and in addition to the progress of the cutting blade 18 in the cutting direction, the elastic rubber body 44 is once compressed and then restored. Due to the rise of the metal receiving member 46 due to the above, cutting proceeds, and no burrs or sagging remain on the cut surface, and the metal receiving member 46 is cut with good sharpness.

  Moreover, since the chipping of the cutting blade 18 is less likely to occur as described above, and the structure achieves excellent cutting performance, the degree of freedom of position adjustment between the bottom dead center of the cutting blade 18 and the metal receiving member 46 is high. The frequency of position adjustment is also reduced. For example, as an example of an application with a high degree of difficulty in cutting, a thin surface fastener tape with an adhesive applied to the back surface is pasted on the release paper, the release paper is left as it is, and only the surface fastener tape is cut to have a predetermined shape. There is an operation to cut out a surface fastener product. When the cloth material is cut, if the gap between the bottom dead center of the cutting blade 18 and the blade receiving surface is wide, uncut parts are likely to be left in the fiber. Conversely, if the gap is narrow, the release paper may be cut together. . Therefore, when a general conventional cutting device is used, it is difficult to set the device, the relative position is incorrect due to use, and uncut portions are generated in a short time, and frequent readjustment is required. However, if this cutting device 10 is used, various settings are easy, the positional relationship is less distorted, the device can be used for a long time, and the number of steps required for the setting can be reduced.

  Further, according to the cutting drive device 50 of this embodiment, the position is very precisely detected by the linear position sensor 94 using the simple drive mechanism using the toggle mechanisms 52 and 54 and the characteristics of the toggle mechanisms 52 and 54. Since the position in the height direction is detected and controlled, a high position control is possible with a simple device, and the cutting blade 18 is used to cut or punch thin and hard workpieces or brittle workpieces, and cracks spread. And can be easily and neatly processed with high accuracy.

  Next, the cutting device 100 of 2nd Embodiment of this invention is demonstrated based on FIGS. Here, the same members as those in the above-described embodiment will be described with the same reference numerals. In this cutting apparatus 100, a holding member 20 and a fixing member 30 are fixed to each of a base 14 and an elevating member 16, and a cutting blade 18 is projected.

  In this cutting apparatus 100, the elevating member 16, which is a movable part, is fixed so as to be horizontal with respect to the elevating mounting board 80 of the cutting drive apparatus. The elevating member 16 is provided so as to be movable up and down while maintaining a horizontal state by the guide post 104. In addition, the base 14 that is a fixed portion fixed to face the lifting member 16 is also fixed to the fixed base 106 of the cutting device 100. The blade edges 18a face each other.

  The cutting blade 18 fixed to the elevating member 16 is electrically controlled to be lifted or lowered so that the cutting edge 18a does not come into contact with the cutting blade 18 on the base 14 side and stops at a close-like body, or illustrated. The position is regulated by a stopper that does not, and is provided so that it can reciprocate.

  As shown in FIGS. 11 to 13, the cutting blade 18 of this embodiment is a frame-shaped blade, the holding member 20 is positioned inside the frame, and the fixing member 30 in which the outside of the cutting blade 18 is divided into four. Thus, the four corners are fixed so as to be pressed respectively. As shown in FIG. 12, the fixing is performed such that the holding member 20 is fixed to the base 14 or the elevating member 16 with bolts 108, and the cutting blade 18 is fitted to the holding member 20. The four fixing members 30 surround the cutting blade 18.

  The fixing members 30 are each attached to the base 14 or the elevating member 16 with bolts 110. The fixing member 30 is provided so as to be slightly slidable with respect to the surface of the base 14 or the elevating member 16, and is provided so that the cutting blade 18 can be clamped. Further, on the outer side of the fixing member 30, a pressing block 112 that is pressed from the side toward the holding member 20 is provided so as to be pressed toward the holding member 20 by a set screw 114. Further, the pressing block 122 is attached to the base 14 or the elevating member 16 with bolts 116 so as to be slightly slidable in the surface direction.

  According to the cutting device 100 of this embodiment, even a material that is easily cracked at the time of cutting can be cut cleanly and can be cut well from a thick to a thin one.

  As shown in FIG. 14, the cutting blade 18 is fixed in a state where the cutting blade 18 is fixed to the holding member 20, and the cutting edge 18 is lined with the blade receiving surface 46 a of the metal receiving member 46. However, it may be attached by being slightly inclined by an angle θ. This inclination is, for example, an inclination such that the difference in the height direction of the position of the blade edge 18a is within the thickness of the workpiece 12 or within an elastically deformable range of the elastic rubber body 44.

  Thereby, for example, a thin metal plate such as stainless steel of about 0.2 mm can be reliably cut.

  Further, as shown in FIG. 15, the workpiece 12 is sheared by the cutting blade 18 whose blade edge 18a is inclined with respect to the surface of the workpiece 12 and the edge 98a of the fixed mold 98 as shown in FIG. It may be cut into pieces.

  Further, as shown in FIGS. 16 and 17, the cutting blade 18 of the double-edged Thomson blade is sandwiched and fixed by the holding member 20 and the fixing member 30, and is fixed to the end of the holding member 20 and the fixing member 30 on the blade edge 18 a side. Are attached on both sides of the cutting blade 18 with an elastic material 102 such as urethane rubber that holds the workpiece 12 against the fixed mold 98. The fixed mold 98 has a slit 104 formed at a portion where the cutting blade 18 is inserted.

  Also in this configuration, as shown in FIG. 17, the cutting edge 18 a of the cutting blade 18 is slightly inclined with respect to the workpiece 12 grounded to the fixed mold 98. Thereby, even if it is the hard to-be-cut | disconnected object 12, it can cut | disconnect favorably finely.

  In addition, the cutting device of this invention is not limited to the said embodiment, A some cutting blade may be attached to one cutting blade part, and a blade receiving part may be comprised with an integral metal receiving member.

  In addition to the synthetic resin, the material and type of the object to be cut can be appropriately selected from paper, cloth, leather, and the like. Further, the size and thickness of the metal receiving member and the elastic rubber body are appropriately determined in consideration of the type of material of the workpiece, the strength of the pressing force applied to the workpiece by the cutting blade, and the metal receiving member and The method for fixing the elastic rubber body to the base can also be freely changed within a range in which cutting is performed by the above-described action.

DESCRIPTION OF SYMBOLS 10 Cutting apparatus 12 Object 12a Product 12b Runner 16 Lifting member 18 Cutting blade 18a Cutting edge 20 Holding member 22 Cutting blade portion 24 Blade receiving portion 30 Fixing member 32a, 32b Set screw 34 Housing hole 42 Base member 42a Recess 44 Elastic rubber body 46 Metal receiving member 50 Cutting drive device

Claims (12)

  In a cutting device comprising a cutting blade and a driving device for the cutting blade, a holding member for positioning the cutting blade, and a fixing member provided to face a side surface formed on the holding member and sandwiching the cutting blade And a pressing member that presses the fixing member against a side surface of the holding member and fixes the cutting blade.   The holding member includes an accommodation hole larger than the cutting blade, the cutting blade is accommodated in the accommodation hole, and the cutting blade is formed by the fixing member provided in the accommodation hole and an inner surface of the accommodation hole. The cutting device according to claim 1, wherein the cutting blade is fixed via the fixing member by pressing the fixing member toward the cutting blade inside the holding member with a set screw which is the pressing member.   The said holding member is provided with the side surface formed in the shape of the said cutting blade, The said cutting blade is pressed to this side surface, and the shape of the said cutting blade is made to follow the shape of the said side surface, and is fixed. Cutting device.   The cutting edge of the cutting blade is formed in a closed annular shape, the holding member is divided into a plurality, and the annular cutting edge is fixed to a surface formed by side surfaces of the plurality of holding members. The cutting device as described.   The cutting blade is provided with a movable part of the cutting device and a fixed part facing the movable part, with the blade edges facing each other, and the cutting blade fixed to the movable part is fixed to the fixed part. The cutting apparatus according to claim 1, wherein the cutting apparatus is provided so as to be able to reciprocate without contacting the cutting edges even in a state closest to the cutting blade.   The cutting device according to claim 1, wherein a line of a cutting edge of the cutting blade is slightly inclined with respect to a surface of a fixed portion of the cutting device facing the cutting blade.   The cutting device according to claim 1, wherein a plurality of the cutting blades are provided, and a plurality of the holding members are provided corresponding to the cutting blades.   A blade receiving portion provided so that the cutting blade can come into contact with the cutting blade is disposed at a position facing the cutting blade, and the blade receiving portion includes an elastic rubber body and a metal receiver disposed on a surface of the elastic rubber body. The cutting apparatus according to claim 1, wherein the metal receiving member is made of a hard metal material equivalent to or higher than the cutting blade.   The elastic rubber body can generate an elastic force larger than the cutting resistance of the object to be cut by the cutting blade, and when the cutting blade presses the surface of the metal receiving member through the object to be cut, When the metal receiving member moves parallel to the plate thickness direction by the compression generated in the elastic rubber body and temporarily moves in the pressing direction, and the elastic force due to the compression of the elastic rubber body becomes larger than the cutting resistance of the workpiece. The cutting device according to claim 8, wherein the compression of the elastic rubber body is restored, and the cutting edge of the cutting blade cuts the workpiece.   The cutting blade is fixed to the holding member, and the position of the bottom dead center of the cutting edge of the cutting blade is below the blade receiving surface of the surface of the blade receiving portion, and the elastic rubber body can be elastically deformed. 8. The cutting device according to claim 7, which is located within a range.   The cutting device according to claim 8 or 10, wherein a cutting edge of the cutting blade is located on a surface slightly inclined with respect to the blade receiving surface facing the cutting blade. The cutting device according to claim 8, wherein a plurality of the cutting blades are provided, and the metal receiving member of the blade receiving portion is divided into a plurality of portions corresponding to the cutting blades.

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