JP2020011350A - Cutting machine - Google Patents

Abstract

To provide a cutting machine that can prevent positional shift of a mat that receives a cutting blade.SOLUTION: The cutting machine comprises: a cutting blade; a mat arranged below the cutting blade and extended in a first direction; a holding groove, extended in the first direction, which holds the mat; and a plurality of positioning protrusions, formed on a first side face and a second side face of the holding groove opposing in a second direction orthogonal to the first direction respectively, which position the mat. The plurality of positioning protrusions position at least both end parts of the mat in the second direction.SELECTED DRAWING: Figure 8

Description

  The present technology relates to a cutting machine that cuts a sheet-shaped object to be cut, for example, paper.

  Conventionally, there has been proposed a paper cutting machine in which a receiving groove having a rectangular cross section is formed below a cutter knife, and an elongated receiving mat (mat) having a rectangular cross section is fitted into the receiving groove. For example, see Patent Literature 1).

JP-A-61-89494

  A clearance is provided between the receiving tree fitting groove and the receiving tree in order to smoothly fit the receiving tree having the rectangular cross section into the receiving tree fitting groove having the rectangular cross section. However, when cutting the object to be cut, the position of the receiving tree is shifted, the object to be cut moves, and the cut may meander.

  The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a cutting machine that prevents displacement of a mat that receives a cutting blade.

  A cutting machine according to the present disclosure includes a cutting blade, a mat disposed below the cutting blade, extending in a first direction, a holding groove extending in the first direction, and holding the mat, A plurality of positioning protrusions formed on each of the first side surface and the second side surface of the holding groove opposed to the second direction perpendicular to one direction, and a plurality of positioning protrusions for positioning the mat, at least the plurality of positioning protrusions, Both ends of the mat are positioned in the second direction.

  In the present disclosure, both ends of the mat are positioned by the plurality of positioning protrusions in the second direction perpendicular to the first direction parallel to the mat, and the misalignment of the mat during cutting is prevented.

  The cutting machine according to the present disclosure is characterized in that the plurality of positioning protrusions are first positioning protrusions respectively formed on the first side surface and the second side surface at the end of the holding groove, and the first positioning protrusion is formed in the middle of the holding groove. It comprises a second positioning projection formed on one side and a second side, respectively, between the second positioning projection formed on the first side and the second positioning projection formed on the second side. The dimension is longer than the dimension between the first positioning protrusion formed on the first side surface and the first positioning protrusion formed on the second side surface.

  In the present disclosure, the dimension between the second positioning projections is long in the middle of the holding groove, and the dimension between the first positioning projections is short at the end of the holding groove. Therefore, when the mat is inserted from the end of the holding groove, the resistance in the middle of the holding groove is reduced, and the mat can be inserted smoothly. When the insertion into the holding groove is completed, both ends of the mat are reliably positioned by the first positioning projections.

  In the cutting machine according to the present disclosure, a lid is disposed at one end of the holding groove, and the plurality of positioning protrusions have a protrusion width on one end side of the holding groove on the other end side of the holding groove. An inclined surface shorter than the protruding width is formed.

  In the present disclosure, when the lid is removed and the mat is inserted from one end of the holding groove, even if the mat contacts the positioning protrusion, the inclined surface reduces the resistance generated between the mat and the positioning protrusion, The mat is smoothly inserted into the holding groove.

  In the cutting machine according to the present disclosure, in the second direction perpendicular to the first direction parallel to the mat, a plurality of positioning protrusions, by positioning both ends of the mat, to prevent the mat misalignment during cutting. You. Therefore, it is possible to prevent the cut of the cut portion from meandering.

FIG. 3 is a perspective view schematically showing the cutting machine in an unfolded state. It is a top view which shows a cutting part schematically. FIG. 3 is a sectional view taken along line III-III shown in FIG. 2. FIG. 4 is a cross-sectional view taken along a line IV-IV shown in FIG. 2. FIG. 5 is a sectional view taken along line VV shown in FIG. 2. It is a front view which briefly shows a cutting part. It is a rear view which briefly shows a cutting part. FIG. 3 is a partially enlarged plan view schematically showing a mat holder and a cutter mat. It is sectional drawing explaining how to use a cutter mat.

  Hereinafter, the present invention will be described with reference to the drawings showing a cutting machine 1 according to an embodiment. In the following description, upper, lower, front, rear, left, and right shown in the figure will be used. FIG. 1 is a perspective view schematically showing the cutting machine 1 in a developed state. The cutting machine 1 includes a cutting portion 20 extending in the front-rear direction, a left base 2 disposed on the left side of the cutting portion 20, and a right base 7 disposed on the right side of the cutting portion 20. The front, rear, left, right, up and down dimensions of the left base 2 and the right base 7 are substantially the same.

  At both ends of the right side of the left base 2 and both ends of the left side of the right base 7, pivots (not shown) having the longitudinal direction as the axial direction are provided. The pivot is inserted into insertion holes (see FIGS. 6 and 7) formed at both front and rear ends of the cutting portion 20, and the left base 2 and the right base 7 are rotatably connected to the cutting portion 20. By rotating the left base 2 and the right base 7 so that the bottom surfaces of the left base 2 and the right base 7 are in contact with each other, the cutting machine 1 is folded as if it were a book. The folded cutter 1 can be stored in a small space, for example, a bookshelf in a general household.

  2 is a plan view schematically showing the cutting portion 20, FIG. 3 is a sectional view taken along line III-III shown in FIG. 2, and FIG. 4 is a sectional line taken along line IV-IV shown in FIG. 5, FIG. 5 is a cross-sectional view taken along line VV shown in FIG. 2, FIG. 6 is a front view schematically showing the cutting section 20, and FIG. 7 is a rear view schematically showing the cutting section 20. FIG.

  As shown in FIGS. 2 and 3, the cutting unit 20 includes a box-shaped mat holder 21 extending in the front-back direction. The upper side of the mat holder 21 is open. At the front end of the mat holder 21, a front end panel 22 is provided. As shown in FIG. 6, the front end panel 22 has two insertion holes 22a into which the front pivots of the left base 2 and the right base 7 are rotatably inserted.

  As shown in FIG. 7, two rear end panels 23 are provided at the rear end of the mat holder 21. The two rear end panels 23 are separated to the left and right. Each rear end panel 23 has an insertion hole 23a. The rear pivots of the left base 2 and the right base 7 described above are rotatably inserted into the insertion holes 23a. A lid 24 is attached to the rear end of the mat holder 21. The lid 24 covers between the two rear end panels 23 in the left-right direction and the upper side of the two rear end panels 23. A holding groove 21a to be described later is arranged between the two rear end panels 23, and the lid 24 closes a rear end opening of the holding groove 21a. The lid 24 can be removed.

  As shown in FIGS. 2 and 5, a holding groove 21 a extending in the front-rear direction is formed at the center of the mat holder 21 in the left-right direction. A plurality of positioning projections 21b are formed on each of the left and right side surfaces of the holding groove 21a. An elongated rectangular parallelepiped cutter mat 25 is inserted into the holding groove 21a, and the positioning protrusions 21b position the cutter mat 25 in the left-right direction. Details of the positioning projection 21b will be described later.

  As shown in FIG. 4, a storage chamber 21d is formed in the mat holder 21 on the left or right side of the holding groove 21a. The storage chambers 21d are formed at the front end and the rear end of the mat holder 21, respectively. The upper side of the storage room 21d is open. The rail holder 26 is stored in the storage room 21d.

  As shown in FIG. 3, a groove 26 a extending in the front-rear direction into which the cutter mat 25 is inserted is formed at the center in the left-right direction of the rail holder 26. As shown in FIG. 13, on the left and right of the groove 26a, the rail holder 26 has an upper surface portion 26c, and a cylindrical boss 26b protrudes downward from the upper surface portion 26c. A biasing member, for example, a spring 27 is provided around the cylindrical boss 26b. The spring 27 urges the rail holder 26 upward. Instead of the spring 27, a rubber or a synthetic resin material having elasticity may be used.

  In the rail holder 26 disposed at the front end of the mat holder 21, a slit 26d extending in the front-rear direction is formed on the lower surface of the groove 26a. A pusher 29 is disposed below the mat holder 21, and a part of the pusher 29 is inserted into the slit 26d from below. Part of the pusher 29 faces the front end of the cutter mat 25. The pusher 29 is movable in the front-rear direction, and by moving the pusher 29 backward, the pusher 29 pushes the front end of the cutter mat 25 to move the cutter mat 25 backward.

  As shown in FIGS. 2, 5 and 7, two rails 28 extending in the front-rear direction are held above the two rail holders 26. The two rails 28 are separated to the left and right, and the cutter mat 25 is exposed from between the two rails 28 in a plan view. As shown in FIG. 5, a gap 28 a into which the object to be cut is inserted is provided between the rail 28 and the mat holder 21 by the urging force of the spring 27.

  A slider 30 is provided on the two rails 28. The slider 30 is movable along the rail 28. The slider 30 includes a handle 31 and a cutting blade 32, and the cutting blade 32 is disposed below the handle 31. The handle 31 and the cutting blade 32 are urged upward by an urging member (not shown). When the handle 31 is lowered against the urging force of the urging member, the cutting blade 32 also moves down.

  With the right base 7 and the left base 2 expanded, the cut object is inserted into the gap 28 a between the rail 28 and the mat holder 21, the handle 31 is pushed down, and the slider 30 is moved, thereby cutting the cutting blade. 32 can cut the cut object.

  FIG. 8 is a partially enlarged plan view schematically showing the mat holder 21 and the cutter mat 25. As described above, the positioning protrusion 21b is formed on each of the left and right side surfaces of the holding groove 21a. The positioning protrusion 21b formed on the left side surface of the holding groove 21a and the positioning protrusion 21b formed on the right side surface of the holding groove 21a face in the left-right direction. The positioning projections 21b formed on the left side and the positioning projections 21b formed on the right side may be arranged in a staggered manner.

  The positioning protrusion 21b has a semi-streamline shape as viewed in a plan view, which has a streamline cut by a cutting surface extending in the up-down direction along the axial direction, and the protrusion width on the rear end side is shorter than the protrusion width on the front end side. Make a shape like That is, the positioning protrusion 21b has the inclined surface 21c in which the protrusion width at the rear end of the holding groove 21a is shorter than the protrusion width at the front end. Note that the positioning projection 21b may have the inclined surface 21c, and may have another shape such as a triangular shape with rounded vertices or a semicircular shape instead of the half streamline shape.

  When the cutter mat 25 is held by the mat holder 21, the lid 24 is removed, and the cutter mat 25 is inserted through the opening at the rear end of the holding groove 21a as shown by the arrow in FIG. When the cutter mat 25 is inserted, friction between the cutter mat 25 and the positioning protrusion 21b is reduced by the inclined surface 21c, and the cutter mat 25 is smoothly inserted into the holding groove 21a. The inserted cutter mat 25 is positioned in the left-right direction by the left and right positioning protrusions 21b.

  As shown in FIG. 8, the left-right dimension between the left and right positioning protrusions 21b located on the front side is d1, and the dimension between the left and right positioning projections 21b located on the rear side is d3. Further, when the left and right dimensions between the foremost positioning protrusion 21b and the rearmost positioning protrusion 21b, that is, between the left and right positioning protrusions 21b formed in the middle of the holding groove 21a are d2. , D2 are longer than d1 or d3. Since d2 is longer than d1 or d3, when the cutter mat 25 is inserted, friction between the cutter mat 25 and the positioning protrusion 21b is less likely to occur in the middle of the holding groove 21a.

  On the other hand, at the front end and the rear end of the holding groove 21a, the cutter mat 25 is strongly sandwiched by the left and right positioning protrusions 21b, and the displacement of the cutter mat 25 in the left and right direction is prevented. Therefore, it is possible to prevent the cut of the cut portion from meandering. The magnitude relationship between d1 and d3 is set as appropriate. The positioning projection 21b located on the most front side or the rear side corresponds to a first positioning projection, and the positioning projection 21b located in the middle part corresponds to a second positioning projection.

  FIG. 9 is a cross-sectional view illustrating a method of using the cutter mat 25. As shown in FIG. 9A, when cutting the cut object 50 (for example, paper) with the cutting blade 32, the cut object 50 is disposed between the cutting blade 32 and the cutter mat 25, and the cutting blade 32 is lowered. Then, the object to be cut 50 is cut by being moved in the front-back direction. At this time, since the cutting blade 32 pushes the upper surface of the elongated rectangular parallelepiped cutter mat 25, protrusions 25a are formed on both left and right sides of the pressed portion of the upper surface. That is, irregularities are formed on the upper surface of the cutter mat 25. When the degree of the irregularities increases, a cutting failure such as generation of an uncut portion or meandering of a cut occurs. Therefore, if necessary, the lid 24 is removed, the pusher 29 is moved backward, the cutter mat 25 is pulled out of the holding groove 21a, rotated 90 degrees around its axis, and inserted again into the holding groove 21a.

  As shown in FIG. 9B, the protrusion 25a of the cutter mat 25 inserted into the holding groove 21a again is located on the left or right side of the cutter mat 25. In other words, the left and right width of the cutter mat 25 is longer than before rotation. The protrusion 25a easily contacts the positioning protrusion 21b formed on the left side surface or the right side surface of the holding groove 21a, and friction is easily generated between the cutter mat 25 and the positioning protrusion 21b.

  As described above, by setting the dimension d2 at the middle part of the holding groove 21a longer than the dimensions d1 and d3 at the front end and the rear end of the holding groove 21a, the width d of the holding groove 21a at the halfway part is increased. Can be increased, and even when the protrusion 25a is formed, the occurrence of friction in the intermediate portion can be reduced, and the cutter mat 25 can be smoothly inserted. On the other hand, when the insertion into the holding groove 21a is completed, both ends of the cutter mat 25 are reliably positioned by the positioning projections 21b arranged at the forefront end and the rearmost end. That is, both positioning of the cutter mat 25 in the left-right direction and smooth insertion of the cutter mat 25 can be achieved.

  The embodiment disclosed this time is an example in all respects, and should be considered as not being restrictive. 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 the modifications within the scope of the claims and the scope equivalent to the scope of the claims. Is done.

2 Left base 7 Right base 20 Cutting part 21 Mat holder 21a Holding groove 21b Positioning protrusion 21c Inclined surface 24 Lid 25 Cutter mat (mat)
25a Projection 30 Slider 31 Handle 32 Cutting blade 50 Cutting object

Claims (3)

Cutting blade,
A mat that is arranged below the cutting blade and extends in the first direction;
A holding groove extending in the first direction and holding the mat,
A plurality of positioning protrusions formed on each of the first side surface and the second side surface of the holding groove facing the second direction perpendicular to the first direction, and positioning the mat.
The cutting machine, wherein the plurality of positioning projections position at least both ends of the mat in the second direction. The plurality of positioning protrusions,
First positioning protrusions formed on the first side surface and the second side surface at the end of the holding groove,
A second positioning protrusion formed on the first side surface and the second side surface in the middle of the holding groove,
The dimension between the second positioning protrusion formed on the first side surface and the second positioning protrusion formed on the second side surface is the first positioning protrusion formed on the first side surface and the second positioning protrusion. The cutting machine according to claim 1, wherein the length is longer than a dimension between the first positioning protrusion formed on two side surfaces. A lid is arranged at one end of the holding groove,
The cutting according to claim 1, wherein each of the plurality of positioning projections is formed with an inclined surface in which a protrusion width at one end of the holding groove is shorter than a protrusion width at the other end of the holding groove. Machine.

Images