JP6572260B2 - Cutting machine - Google Patents

Description

  The present technology relates to a cutting machine for cutting a material to be cut, for example, paper.

  Conventionally, a cutting machine has been proposed that includes a base on which a material to be cut is placed, a rail disposed on the surface of the base, a slider that slides on the rail, and a cutting blade provided on the slider. . A cutter mat along the rail is provided on the base surface. The material to be cut is disposed between the cutting blade and the cutter mat, the cutting blade is moved along the rail together with the slider, and the material to be cut is cut (see, for example, Patent Document 1).

  When the cutter is used repeatedly, many scars are generated on the surface of the cutter mat, and the cutter mat is consumed. A large number of scars tend to generate burrs on the cut surface of the material to be cut. The worn cutter mat is replaced with a new cutter mat.

  Conventionally, a shearing machine including a cylindrical blade edge protector (cutter mat) has been proposed. When the cutting is performed a predetermined number of times, the blade edge protector rotates around the axis. Thereby, a blade edge | tip protector can be used effectively and the frequency | count of replacement | exchange can be reduced (for example, refer patent document 2).

JP 2011-255484 A Japanese Utility Model Publication No. 52-56387

  However, when the cutter mat has a cylindrical shape, the material to be cut cannot be cut linearly unless the blade is positioned at the apex of the cutter mat. Therefore, it is necessary to position the blade and the cutter mat with high accuracy.

  The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to achieve effective use of the mat and reduction in replacement frequency without requiring high-precision positioning between the cutting blade and the mat. To provide a cutting machine.

  A cutting machine according to the present disclosure is a cutting machine including a mounting table on which a material to be cut is mounted, a cutting blade that is movable on the mounting table, and a mat that is disposed to face the cutting blade, The mat has a columnar shape that is rotatable around an axis having a plurality of planes on the peripheral surface, and any one of the planes faces the cutting blade.

  In the cutting machine according to the present disclosure, a groove along the axial direction is formed in the mat, and includes a locking portion that locks in the groove.

  The mat of the cutting machine according to the present disclosure is accommodated in the mounting table so as to be movable in a radial direction of the mat.

  In the cutting machine according to the present disclosure, an operation unit is provided on the mat.

  In the cutting machine according to the present disclosure, the cutting blade is disposed at a position deviated with respect to the rotation center of the mat.

  In the cutting machine according to the present disclosure, the mat has a columnar shape, and a plurality of planes are formed on the peripheral surface thereof. For positioning of the cutting blade and the mat, it is sufficient that the cutting blade is opposed to an arbitrary position on the plane at a right angle. Therefore, high-precision positioning is not required. When one plane is consumed, the mat is rotated around the axis and the other plane is opposed to the cutting blade. Therefore, the mat replacement frequency can be reduced.

It is a top view which briefly shows the cutting machine concerning an embodiment. FIG. 5 is a partially enlarged perspective view schematically showing a configuration near a cutter. FIG. 3 is a schematic cross-sectional view taken along line III-III shown in FIG. 1. It is a top view which briefly shows a holder and a mat. It is a left view which shows a holder and a mat | matte schematically. It is a right view which shows a holder and a mat | matte schematically. FIG. 2 is a plan view schematically showing a mat. FIG. 3 is a left side view schematically showing a mat. FIG. 8 is a schematic cross-sectional view of the body taken along line IX-IX in FIG. 7. FIG. 8 is a schematic cross-sectional view of a locked portion taken along line XX in FIG. 7. FIG. 5 is a partially enlarged cross-sectional view schematically showing the XI-XI line shown in FIG. 4 as a cutting line. It is sectional drawing which shows schematically an example of the body which changed the structure partially. It is sectional drawing which shows schematically the other example of the body which changed the structure partially. It is sectional drawing which shows schematically an example of the mat | matte which changed the structure partially.

  Hereinafter, a cutting machine according to an embodiment will be described with reference to the drawings. In the following description, the top / bottom / left / right front / rear shown in the figure are used. 1 is a plan view schematically showing a cutting machine, FIG. 2 is a partially enlarged perspective view schematically showing a configuration in the vicinity of a cutter, and FIG. 3 is a schematic cross-sectional view taken along line III-III shown in FIG. FIG.

  The cutting machine includes a mounting table 1 having a rectangular box shape. The mounting table 1 is placed flat and extends in the left-right direction. An opening 1 a extending in the left-right direction is formed in the rear edge portion of the upper surface portion of the mounting table 1. A storage recess 1 c is provided in the left edge portion of the upper surface portion of the mounting table 1. The storage recess 1c stores a replacement blade for the cutting blade 13, which will be described later. The replacement blade is housed in the housing recess 1c in a state of being put in, for example, a protective case.

  As shown in FIGS. 2 and 3, a presser 16 that presses the object to be cut is provided at the rear end portion of the left side surface of the mounting table 1. The presser 16 includes a side plate 16a parallel to the left side surface of the mounting table 1, and a presser plate 16b protruding from the side plate 16a at a right angle in the right direction.

  The side plate 16a extends in the front-rear direction, and the rear end portion thereof is rotatably connected to the left side surface of the mounting table 1. The side plate 16a can rotate with the left-right direction as the rotation axis direction. The side plate 16 a protrudes obliquely upward and forward from the left side surface of the mounting table 1, and the front end portion of the side plate 16 a is located above the mounting table 1. The holding plate 16b is provided at the front end portion of the side plate 16a and is disposed above the front edge portion of the opening 1a. The pressing plate 16b protrudes rearward so as to cover the front portion of the opening 1a. The pressing plate 16b does not cover the rear portion of the opening 1a.

  A presser 16 is also provided at the rear end of the right side surface of the mounting table 1 in the same manner as the left side surface. On the right side, the side plate 16a of the presser 16 is parallel to the right side, and the presser plate 16b is provided at the front end of the side plate 16a.

  The two left and right pressing plates 16b respectively support the left and right end portions of the guide rail 2 extending in the left-right direction. A cutter 10 is provided on the guide rail 2. The cutter 10 includes a slider 11 and a circular cutting blade 13 attached to the slider 11. The slider 11 has a box shape with an open bottom surface. The slider 11 can move in the left-right direction along the guide rail 2. The cutting blade 13 is supported by the support portion 12 inside the slider 11. The cutting blade 13 is disposed on the rear side of the pressing plate 16b, in other words, on the upper side of the rear portion of the opening 1a.

  The support portion 12 is biased upward by a spring 15. The upper part of the support part 12 protrudes upward from the slider 11. A dome-shaped handle 14 having a lower surface opened is provided on the upper side of the slider 11. The left end portion of the handle 14 is attached to the slider 11 so as to be rotatable. The handle 14 can rotate with the front-rear direction as the rotation axis direction. The handle 14 is pushed upward by the support portion 12. When the handle 14 is pushed, the support portion 12 is pushed down, the cutting blade 13 is lowered, protrudes below the slider 11, and approaches the opening 1a.

  In the mounting table 1, a holder accommodating chamber 1b is formed below the opening 1a. The holder accommodating chamber 1b has a rectangular shape extending in the left-right direction, and the lower part is open. The front-rear width of the holder accommodating chamber 1b is larger than the front-rear width of the opening 1a.

  4 is a plan view schematically showing the holder 4 and the mat 3, FIG. 5 is a left side view schematically showing the holder 4 and the mat 3, and FIG. 6 is a right side view schematically showing the holder 4 and the mat 3. is there. 5 and 6, the mat 3 is indicated by a broken line in order to clearly indicate the U-shaped opening 4d. A holder 4 for holding the mat 3 is accommodated in the holder accommodating chamber 1b. As shown in FIG. 4, the holder 4 has a rectangular box shape extending left and right.

  A mat storage chamber 4a is formed at the center in the front-rear direction of the holder 4 and extends left and right and is open at the top. Further, a locking portion accommodating chamber 4b extending forward and having an open top is formed in each of the left and right end portions of the holder 4. The rear end portion of the locking portion accommodating chamber 4b is continuous with the mat accommodating chamber 4a. Two flexible walls 4c and 4c are erected on the rear side of the two engaging portion accommodating chambers 4b and 4b, respectively. The wall 4c is spaced rearward from the locking portion accommodating chamber 4b. The wall 4c extends to the left and right and is arranged to face the mat storage chamber 4a.

  As shown in FIG. 5, a U-shaped opening 4 d whose upper side is open is formed at the upper edge of the left side surface 42 of the holder 4. As shown in FIG. 6, a U-shaped opening 4 d whose upper side is opened is also formed at the upper edge portion of the right side surface 41 of the holder 4. Each U-shaped opening 4d is connected to the mat accommodating chamber 4a and the locking portion accommodating chamber 4b. The mat 3 is accommodated in the mat accommodating chamber 4a.

  7 is a plan view schematically showing the mat 3, FIG. 8 is a left side view schematically showing the mat 3, and FIG. 9 is a schematic cross-sectional view of the body 3a taken along line IX-IX in FIG. FIG. 10 is a schematic cross-sectional view of the locked portion 3b taken along line XX in FIG. The mat 3 includes a columnar body 3a extending in the left-right direction, a locked portion 3b formed at each of the left and right ends of the body 3a, and a shaft 3d protruding in the axial direction from the locked portion 3b. Prepare.

  As shown in FIG. 9, the cross section of the body 3a along the direction perpendicular to the axial direction has a polygonal shape (a regular octagonal shape in this embodiment). As shown in FIG. 7, a plurality of flat surfaces 30 extending in the axial direction are formed on the outer peripheral surface of the body 3a. The body 3a is rotatable around the central axis P.

  As shown in FIG. 3, the plane 30 of the body 3 a located on the uppermost side faces the opening 1 a and faces the cutting blade 13. The cutting blade 13 is located on the rear side of the central axis P, and is disposed at a position deviated from the rotation center of the body 3a. The cutting blade 13 is preferably not located directly above the central axis P of the body 3a, and may be located on the front side of the central axis P. The cutting blade 13 may be disposed immediately above the central axis P of the body 3a.

  The cross section of the body 3a is not limited to a regular octagonal shape, and may be a regular square shape or a regular hexagonal shape, for example. The cross section of the body 3a only needs to have a shape in which the flat surface 30 faces the cutting blade 13 when placed flat.

  As shown in FIGS. 7 and 10, the locked portion 3b has a short cylindrical shape, and a plurality of grooves 3c arranged in the circumferential direction are formed on the peripheral surface thereof. The groove 3c extends in the axial direction. The locked portion 3b is disposed between the wall 4c and the locking portion 5. The diameter of the locked portion 3b is substantially the same as the diameter of the body 3a.

  As shown in FIGS. 7 and 8, a shaft 3d protrudes in the axial direction from the center of the end face of the locked portion 3b. The shaft 3d is disposed on the central axis P. The diameter of the shaft 3d is smaller than the diameters of the locked portion 3b and the body 3a.

  As shown in FIG. 4, the mat 3 is accommodated in the holder 4. The body 3a is disposed in the mat storage chamber 4a. A space is secured on the upper side of the body 3a. The vertical dimension of the space has at least a difference between the shortest distance D1 between the central axis P and the plane 30 and the longest distance D2 between the central axis P and the plane 30 (see FIG. 9). In other words, the vertical dimension of the space has at least a difference between the longest distance between the central axis P and the mat 3 circumferential surface and the shortest distance between the central axis P and the mat 3 circumferential surface. In this embodiment, the difference corresponds to the radial distance between the inscribed circle and the circumscribed circle in the cross section of the body 3a having a polygonal shape. The to-be-latched part 3b is arrange | positioned in the part which the latching | locking part accommodating chamber 4b and the mat | matte accommodating chamber 4a continue.

  As shown in FIGS. 3 and 4, the front-rear dimension of the body 3a is smaller than the front-rear dimension of the mat storage chamber 4a. That is, the body 3a and the mat accommodation chamber 4a are designed so that a space is secured also between the body 3a and the front wall and the rear wall of the mat accommodation chamber 4a.

  As shown in FIGS. 4 and 5, the left shaft 3 d protrudes outside the left side surface 42 through the U-shaped opening 4 d. An operation unit 3e is attached to the right shaft 3d. The operation portion 3e includes a columnar small diameter portion 3f extending left and right, and a columnar large diameter portion 3g formed at the right end of the small diameter portion. The radial dimension of the small-diameter portion 3f is shorter than the front-rear dimension of the U-shaped opening 4d of the right side surface 41. The radial dimension of the large-diameter portion 3g is longer than the longitudinal dimension of the U-shaped opening 4d of the right side surface 41. The small diameter portion 3f protrudes outside the right side surface 41 through the U-shaped opening 4d. The large-diameter portion 3g is provided at the protruding end of the small-diameter portion 3f and is disposed on the right side of the right side surface 41. The small diameter portion 3f and the large diameter portion 3g are disposed on the central axis P. The diameter of the small diameter part 3f is larger than the diameter of the shaft 3d and smaller than the diameters of the locked part 3b and the body 3a.

  FIG. 11 is a partially enlarged cross-sectional view schematically showing the XI-XI line shown in FIG. 4 as a cutting line. The locking part 5 is accommodated in the locking part accommodation chamber 4b. The locking portion 5 includes a bottomed rectangular tube portion 5a and a locking projection 5b protruding outward from the bottom portion of the bottomed rectangular tube portion 5a. The latching | locking part 5 is accommodated in the latching | locking part accommodating chamber 4b so that the bottom part of the bottomed square cylinder part 5a may be arrange | positioned back. A biasing member 6 is inserted into the locking portion 5.

  The urging member 6 has elasticity and is sandwiched between the front part of the engaging part accommodating chamber 4b and the rear part of the engaging part 5, and urges the engaging part 5 backward. As shown in FIG. 11, the locking projection 5 b faces the locked portion 3 b and is engaged with the groove 3 c by the biasing force of the biasing member 6. By engaging the locking projection 5b with the groove 3c, unnecessary movement of the mat 3 is suppressed. As described above, the locked portion 3 b is disposed between the flexible wall 4 c and the locking portion 5. Therefore, the locked portion 3b urged rearward by the urging force of the urging member 6 contacts the wall 4c. The wall 4c bends and urges the locked portion 3b forward, that is, toward the locking portion 5 by an elastic restoring force. The locked portion 3b is held by the locking portion 5 and the wall 4c.

  When cutting a material to be cut (for example, paper or cardboard), the material to be cut is arranged between the pressing plate 16b and the mounting table 1 so as to cover the opening 1a. The handle 14 is pushed down, the support part 12 is pushed down, and the cutting blade 13 is lowered. The cutting blade 13 protrudes below the slider 11 and enters the material to be cut up to the mat 3. By moving the slider 11 in the left-right direction, the cutting blade 13 also moves in the left-right direction, and the material to be cut is cut. Due to the movement of the cutting blade 13, a scar is generated on the plane 30 of the body 3a located on the uppermost side.

  When a large number of scars are generated on the plane 30 and the plane 30 is consumed, the user can rotate the operation portion 3e of the mat 3 to rotate the body 3a so that the other plane 30 is arranged on the top. it can. When the body 3a is rotated, the corners of the body 3a come into contact with the lower surface of the mat storage chamber 4a, and the body 3a (mat 3) is pushed upward.

  The pushed-up distance corresponds to the difference between the longest distance D2 and the shortest distance D1. As described above, a space is secured above the body 3a, and the vertical dimension of the space has at least the difference. The small-diameter portion 3f and the shaft 3d are inserted into a U-shaped opening 4d opened on the upper side. Therefore, even if pushed up, the mat 3 can rotate without interfering with the mounting table 1.

  When the mat 3 rotates, the body 3a also moves in the front-rear direction, the front diagonally upward direction, and the rear diagonally upward direction. As described above, since the space is also secured before and after the body 3a, the body 3a can move in the front-rear direction. Further, since a space is also secured on the upper side of the body 3a, the body 3a can move in the front diagonally upward direction and the rear diagonally upward direction. That is, the mat 3 is movable in the radial direction of the mat 3. Therefore, the mat 3 can smoothly rotate in the mat storage chamber 4a.

  By the rotation of the mat 3, the locking projection 5b escapes from the one groove 3c. The locking projection 5b contacts the peripheral surface of the locked portion 3b, and the locking portion 5 is pushed forward. Since the urging member 6 has elasticity, it is shortened when the locking portion 5 is pushed. The locking part 5 moves forward. The mat 3 further rotates, and the latching protrusion 5b is inserted into the other groove 3c and engaged by the biasing force of the biasing member 6. When the locking projection 5b is engaged with the other groove 3c, the other flat surface 30 is arranged at the top and faces the cutting blade 13.

  The urging member 6 may be deleted, and a pivot having the left-right direction as the rotation axis direction may be attached to the front end portion of the locking portion 5. The pivot is supported by the locking portion accommodating chamber 4b. In this case, when the mat 3 rotates, the locking portion 5 rotates around the pivot, and the locking projection 5b escapes from one groove 3c and engages with the other groove 3c.

  Instead of the U-shaped opening 4d, long holes extending vertically may be provided on the left and right side surfaces 41, 42 of the holder 4. In this case, the long hole has such a dimension that the small diameter portion 3f and the shaft 3d can move up and down.

  FIG. 12 is a cross-sectional view schematically showing an example of the body 3a whose structure is partially changed. As shown in FIG. 12, a plurality of planes 30 and curved surfaces 31 may be provided on the peripheral surface of the body 3a. Even in this case, a space is secured above the body 3a. The vertical dimension of the space has at least a difference between the longest distance between the central axis P and the mat 3 circumferential surface and the shortest distance between the central axis P and the mat 3 circumferential surface.

  FIG. 13 is a cross-sectional view schematically showing another example of the body 3a whose structure is partially changed. As shown in FIG. 13A, the body 3a may have a hollow column shape. Further, as shown in FIG. 13B, the body 3a may have a hollow columnar shape, and may include a cross-shaped cross-shaped rib 35 extending in the axial direction therein.

  As shown in FIGS. 13C to 13F, the body 3a includes a small-diameter inner cylinder 32, an outer cylinder 33 that covers the outer side of the inner cylinder 32, and one or more of the outer cylinder 33 and the inner cylinder 32. A connecting rib 34 may be provided. The cross section of the inner cylinder 32 along the direction perpendicular to the axial direction may be a polygon such as a regular octagon, a quadrangle, or a star, or a circle. Moreover, you may form the some plane 30 and the curved surface 31 in the outer peripheral surface of the hollow body 3a. By forming the body 3a to be hollow, it is possible to reduce the weight while maintaining the strength.

  FIG. 14 is a cross-sectional view schematically showing an example of the mat 3 whose structure is partially changed. As shown in FIG. 14, the mat 3 includes a cylindrical body 3a and parts 3B attached to both ends of the body 3a. The component 3B includes a locked portion 3b and shafts 3d and 3h protruding from both axial end surfaces of the locked portion 3b. The diameter of the shaft 3h is smaller than the diameters of the locked portion 3b and the body 3a. The component 3B is attached to the body 3a by inserting the shaft 3h into the hole at the end of the body 3a. In addition, you may provide an adhesive agent in the contact part of the to-be-latched part 3b and the body 3a. Thus, the mat 3 may be constituted by three parts including the body 3a and the two parts 3B and 3B.

  In the cutting machine according to the embodiment, the mat 3 has a columnar shape, and a plurality of planes 30 are formed on the peripheral surface thereof. The positioning of the cutting blade 13 and the mat 3 is sufficient if the cutting blade 13 is opposed to an arbitrary position on the plane 30. Therefore, high-precision positioning is not required. When one flat surface 30 is consumed, the mat 3 is rotated around the axis, and the other flat surface 30 is opposed to the cutting blade 13. Therefore, the replacement frequency of the mat 3 can be reduced.

  Moreover, since the cross section of the mat 3 along the direction perpendicular to the axial direction has a polygonal shape, a large number of planes 30 can be secured.

  Further, the engaging protrusion 5b is engaged with the groove 3c of the mat 3, and unnecessary movement of the mat 3 is suppressed. Since the locking protrusion 5b is urged by the urging member 6 to the groove 3c, the locking protrusion 5b does not easily escape from the groove 3c. On the other hand, when the mat 3 is rotated with a predetermined force or more, the locking projection 5b can escape from the groove 3c and the other flat surface 30 can be opposed to the cutting blade 13.

  Further, a space is provided between the upper surface portion of the mounting table 1 and the mat 3. The vertical dimension of the space is at least the difference between the shortest distance D1 between the central axis P of the mat 3 and the plane 30 and the longest distance D2 between the central axis P of the mat 3 and the plane 30, that is, the central axis P and the mat. It has a difference between the longest distance from the three circumferential surfaces and the shortest distance between the central axis P and the three circumferential surfaces of the mat. Therefore, it is possible to prevent the mat 3 from interfering with the mounting table 1 when the mat 3 rotates.

  Further, the cutting blade 13 is not disposed immediately above the central axis P of the mat 3 but is disposed forward or rearward of the central axis P. For example, when one plane 30 is consumed, the left and right sides of the mat 3 are reversed and held by the holder 4 so that a portion where the scar is not generated on the one plane 30 faces the cutting blade 13. it can. That is, even after all the planes 30 are used by rotating the mat 3, the mat 3 is reversed and held by the holder 4, thereby further utilizing the mat 3 and extending the life of the mat 3. be able to.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

DESCRIPTION OF SYMBOLS 1 Mounting stand 2 Guide rail 3 Mat 3a Body 3b Locked part 3c Groove 3e Operation part 30 Plane 5 Locking part 6 Energizing member 10 Cutter 13 Cutting blade

Claims (5)

A cutting machine comprising a mounting table for mounting a material to be cut, a cutting blade movable on the mounting table, and a mat disposed opposite to the cutting blade,
The mat has a columnar shape that can rotate around an axis having a plurality of planes on the peripheral surface,
Any one of the planes faces the cutting blade ;
A groove along the axial direction is formed in the mat,
Cutter Ru provided with a locking portion for locking the groove. A cutting machine comprising: a mounting table having a mounting surface on which a material to be cut is mounted; a cutting blade movable on the mounting table; and a mat disposed opposite to the cutting blade;
Formed inside the mounting table, comprising a storage chamber for storing the mat,
The mat has a columnar shape that can rotate around an axis having a plurality of planes on the peripheral surface,
An opening extending in the axial direction of the mat is formed at a portion inside the edge of the mounting surface,
Any one of the planes faces the cutting blade through the opening;
A space is provided between the mat and the cutting blade,
The dimension of the space in the facing direction of the mat and the cutting blade has at least a difference between the shortest distance between the central axis of the mat and the plane and the longest distance between the central axis and the plane. And
When the mat is rotated, the mat contacts the bottom surface of the storage chamber, and the mat is pushed up toward the opening by the difference distance.
Cutting machine. The cutting machine according to claim 1 or 2, wherein the mat is accommodated in the mounting table so as to be movable in a radial direction of the mat. The cutting machine according to any one of claims 1 to 3, wherein an operation unit is provided on the mat. The cutting machine according to any one of claims 1 to 4, wherein the cutting blade is disposed at a position deviated with respect to a rotation center of the mat.

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