JPS63127897A - Automatic cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for automatically cutting fabric in the apparel manufacturing industry.

[Conventional technology]

Traditionally used in the apparel manufacturing field, there is a so-called gerba cutter method in which a dagger-shaped blade moves up and down to cut cloth, or a device that cuts cloth using laser light, water jet, etc. Laser cutters and water jet cutters have been put into practical use, but they are not only expensive (but also difficult to handle).

Furthermore, a so-called band knife type manual cutting machine has been widely used, and this is shown in FIG.
1 is provided to pass through a slit 103 made in the table 102, and the band-shaped cutter 101 is endlessly driven by the blades 104' and 104'' rotated by a drive unit.

The cutting operation is performed by cutting an object 10 such as cloth placed on a table 102 against the blade 101' of the belt-shaped blade 101 described above.
5 is cut into a predetermined shape by advancing the cloth 105 along a cut line 106 drawn on the cloth 105 in the same manner as when using a sewing machine. Since force is applied to the blade 101 when cutting the cloth 105 used in this conventional device, an N is placed on one side of the pulleys 104, 104' to prevent the blade 101 from coming off the pulleys 104, 104'.
108 is formed.

[Problem that the invention seeks to solve]

The above-mentioned manual cutting machine has a problem in that it requires human labor for cutting, so it is possible to automate this and move the workpiece placed on the table while controlling it in the X-Y direction. Furthermore, the present inventor previously proposed that the workpiece be cut in a so-called brush-writing manner by rotating an endless belt-shaped cutter relative to a plane containing the workpiece mounting table (Japanese Patent Application No. 1983-1999). 205948), in order to cut as described above, the knife needs to have double-edged blades, and if the workpiece on the table is moved in the X or Y direction, a large space is required for the movement. In addition, as mentioned above, since a double-edged belt-shaped knife is used, the pulley must be closed in order to prevent the belt-shaped knife from falling off the pulley due to the pressing of the workpiece during cutting. For example, not only is it not possible to provide a tsuba, but the sharpness of the blade becomes worse as the cutting process continues, so the blade must be polished. A blade of about 10mm is used, but it is customary to use the blade up to about 5mm by repeating the above-mentioned polishing.For this reason, even if the blade becomes narrow, the center is not shifted to one side. There is a need to.

The present invention aims to solve the above-mentioned problems and to automate a cutting machine.

[Means for solving problems]

In order to achieve the above object, the automatic cutting machine of the present invention has the following features:
A means for causing an endless double-edged band knife to run orthogonally to a table on which a workpiece is placed, and for rotating the band knife with respect to a plane including the table surface within a range in which the band knife runs orthogonally to the table. and has a presser roller that clamps the side surface of the blade body of the double-edged band knife during the rotation, and the blade holding shaft support plates, which are biased in a direction approaching each other, are arranged such that they intersect at their tips. The knife holding shafts are rotatably supported at different levels, and the intersecting portions of the distal ends of the knife holding shafts arranged at different levels are brought into contact with the slopes of the respective blades of the double-edged band knife. It is characterized in that the presser roller and the blade holding shaft are rotated in synchronization with the traveling speed of the band knife.

[Function] The automatic cutting machine of the present invention uses an endless double-edged band knife that runs orthogonally to a table on which a workpiece is placed, to cut a plane that includes the table surface in a range that runs orthogonally to the table. The workpiece is cut into a desired shape by the rotation of the double-edged band knife and the controlled movement of the workpiece and the main body frame on which the band knife is mounted.

When cutting the workpiece, a cutting reaction force acts on the band knife, but in the present invention, each of the blade supporting shaft support plates, which are constantly biased in a direction toward each other, Since the blade holding shafts are rotatably supported in a stepped manner so that their tips intersect, and the intersecting portions are brought into contact with the slopes of the respective cutting edges of the double-edged band knife, the double-edged band knife is held. , the band knife will not fall off from the pulley etc. due to reaction force during cutting.

In addition, since the side surfaces of the blade of the band knife are held between the presser rollers, the rotation is easily performed, and furthermore, the respective blade holding shafts and presser rollers described above are rotated in synchronization with the running speed of the band knife. Therefore, the friction between them is extremely small, and there is no problem in running the band knife.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In the figure, 1 is a U-shaped plate-shaped main body frame, and at the bottom of the main body frame 1 are shafts 3, 3 that rotatably support wheels 2.2, 2.2, which are spaced apart in the front and rear direction. The wheels 2, 2, 2.degree. 2 move on rails 4, 4 laid on the floor.

Reference numeral 5 denotes an air cylinder with a piston 6 connected to the rear side of the main body frame 1 to move the main body frame 1 forward and backward in the X direction. Wheels 2, 2 on 4, 4
, 2.2 is transferred, so that the main body frame is not controlled and performs the desired movement in the X direction.

7', 7. , 7□, 73 are pulleys rotatably supported by the body frame 1, and these pulleys 7゜7
An endless double-edged band knife 8 is wound around 1.7□, 73, and a pulley is driven by a drive section (not shown) to cause the double-edged band knife 8 to travel.

Reference numeral 9 indicates a gap between the table 10 and the table 10, which serves as a passage when the U-shaped main body frame 1 moves forward or backward in the X direction; An overhang tool 10 is flush with the surface of the overhang tool 10, and 12 is a rotating receiver through which the double-edged band knife 8 provided on the overhang tool 11 is inserted. A caterpillar chain 13 is fixed, and the caterpillar chain 13 (direction changing roller 1 arranged on the side of the table 10
4 and a direction changing roller 15 disposed below the table 10 and extends below the table 10, and its end is connected to a spring 16 fixed to the main body frame 1.

Reference numerals 17 and 17 (one not shown) are rods for moving the workpiece that are loosely fitted to both sides of the table 100 and movable in the Y direction;
．． At the bottom of each rack 18.17 there is a rack 18.17 which meshes with a pinion 19.19 (one not shown) which rotates in a controlled manner.
18 (one not shown) is engraved, and the above-mentioned binion 1
The workpiece moving frame 17.17 moves in the Y direction by the rotation at 9.19.

In this embodiment, the workpiece moving rods 17, 1
7 is movable with respect to the table 10, and the workpiece is moved on the table 10 by the workpiece movement rod 17, 17 as follows. That is, as shown in FIGS. 6 and 7, each rod 17 for moving the workpiece has a protrusion 21 that is loosely fitted into groove-shaped rails 20 formed on both sides of the table 10. It is protruded from the side. 22°22, 22. . . . are a plurality of holes provided at intervals in the longitudinal direction of the rod 17 for moving the workpiece, and the rods 23, 23 .・
Establish... In addition, 24 is a boss portion 25.25 and 26.26.2 with through holes drilled at both ends, respectively.
The rod 23 is inserted into the through hole of the boss portion 25.25, and the bottom of the hole 22 and the workpiece physical plate 24 are formed. A spring 27 is interposed between the bottom surface of the boss part 26°26, 26.
The needle bar 28 is inserted into the through hole, and the needle bar 28 is inserted into the through hole.
The rod 17 for moving the workpiece and the workpiece 3 are inserted into the workpiece 30 stacked in large numbers on a carrier sheet 29 made of cardboard or foamed resin placed on the table 10.
0 are integrally connected to each other by the aforementioned workpiece physical plate 24. 31.31.31. . . . is a fixture for fixing the carrier sheet 29 to the rod 17 for moving the workpiece. Also, 32.32... and 33.33.3
3... is the rod 23.23 and needle bar 28.28.
・・・・・・Boss part 25゜25, 26.26...
・This is a set screw that fixes to.

Next, a device for holding the above-mentioned double-edged band knife 8 and turning it (hereinafter simply referred to as turning) with respect to a plane including the table surface will be explained.

The device for holding and rotating the band knife 8 is as follows:
The band knife 8 is installed in a storage box 34, 34 in which a blade holder and a turning gear provided above and below the range in which the band knife 8 is moved in a direction perpendicular to the workpiece 30 are stored. Since they have exactly the same configuration, one of them will be explained.

In FIGS. 2 to 5, 35 is a bottom plate;
A slit 36 for inserting the double-edged band knife 8 and a hole 37 communicating with the slit 36 in which the band knife 8 can be rotated are provided in the center of one side.
A recess 3 serving as a shaft hole is provided on the other side of the bottom plate 35 at a predetermined interval.
A screw shaft support plate 38.38' having a diameter of 9.39' is installed upright.

Reference numeral 40 denotes a shaft support plate for holding a knife, which is composed of a bent piece 41, 41' having an obtuse angle, and a drawing peripheral piece 42 provided with a screw hole 43 into which a right-handed thread of a screw shaft (to be described later) is screwed;
is a bent piece 45.45' forming an obtuse-angled opening opposite to the open side of the obtuse-angled bent piece 41.41' of the blade holding shaft support plate 40 described above, and a left side of the screw shaft described later. This is a shaft support plate for holding a cutlery consisting of a pulling peripheral piece 46 provided with a screw hole 47 into which a screw is inserted.

48, 48' are one of the blade holding shaft support plates 40 mentioned above.
The blade holding shafts are rotatably supported at right angles to the bent pieces 41 and 41' at different levels and at right angles to the respective pieces 41 and 41', and the blade holding shafts 48 and 48 ' are arranged at right angles to each piece of the obtuse-angled bent piece in a staggered manner, so that the tips thereof form a cross-shape. 49.49' is perpendicular to each piece 45.45' of the obtuse angle bent piece of the other blade holding shaft support plate 44 disposed opposite to the blade holding shaft support plate 40 described above. , and is a shaft for holding a cutter which is rotatably supported in a staggered state, and the shafts 49 and 49' have an intersecting shape at their tips, similar to the above.

The intersection portion formed at the tip of the cutter holding shaft 48, 48' disposed on one of the cutter holding shaft support plates 40 and the other cutter holding shaft support plate 44 are intersected with each other. The intersection formed at the tip of the blade holding shaft 49, 49 is
Since the respective blade holding shaft support plates 40 and 44 are arranged facing each other so that their open sides face each other, their respective intersecting portions face each other, and the respective intersecting portions are connected to the double-edged band. The band knife 8 is held so as to be in contact with the oblique side of each blade edge of the knife 8.

The arrangement relationship between the intersection point of the axes 48.48 and the intersection point of the axis 49.49', where the tips intersect, is such that even if they face each other, they are above and below. Also, the respective intersecting axes 48, 48', and 49 and 49' may have either axis on top.
For example, as shown in FIG.
The shaft 48' and the shaft 49' may be arranged on the lower side, and the shaft 48' and the shaft 49 may be arranged on the upper side.
' may be disposed at the top in a stepped manner, the other shaft 49' may be disposed at the top, and the shaft 49 may be disposed at the bottom. It would be good if it could hold.

Furthermore, motors M, , Mz, M3 are attached to each of the blade holding shafts 48, 48' and 49°49'.
, Ma are connected, and these blade holding shafts 48, 48',
49. The rotation of 49' is synchronized with the traveling speed of the band knife 8.

50 is a right-handed screw 51 and a left-handed screw 52 on the left and right with the center as a boundary.
The right-hand thread 51 of the screw shaft is engraved with the screw hole 43 of the pulling circumferential piece 42 of the blade holding shaft support plate 40.
Also, the left-hand thread 52 of the screw shaft 50 is screwed into the screw hole 47 of the pulling peripheral piece 46 of the blade holding shaft support plate 44, and the left-hand thread 52 of the screw shaft 50 is screwed into the screw shaft support plate 38° 38 which is erected on the bottom plate 35 described above. ' is mounted with a screw shaft 50, and at this time, the drawing circumferential piece 42
and 46 are located opposite to each other inside the screw shaft support plates 38° and 38', and are screwed together with the right-hand thread 51 and left-hand thread 52 of the screw shaft 50 by rotation of the screw shaft 56. The knife holding shaft support plates 40 and 44, which are provided with pulling pieces 42 and 46, are movable in a direction toward each other.

Reference numeral 53 denotes a torque motor or rotary air actuator connected to the screw shaft 50 and constantly driving the screw shaft 50 with a slight rotation.
It is fixed at 5.

Reference numerals 54 and 54' denote side plates fixed to the shorter side of the bottom plate 35 described above, and a cutter holding press roller 55.55' and a gear 56.56' are fixed to the upper part of the cough side plate 54, 54'. The two shafts 57 and 57' are mounted horizontally, and a motor 58 is connected to one of the shafts 57.

Therefore, the shaft 57 is rotated by the drive of the motor 58,
A gear 56 fixed to the shaft 57 and a presser roller 55 also rotate. The gear 56' that meshes with the gear 56 is rotated by the above rotation, and the shaft 57' fixed to the gear 56' and the presser roller 55' also rotate, and the presser roller 55'
The double-edged band knife 8 is held from the side surface of the blade body by the above-mentioned presser roller 55. The blade holding rollers 55 and 55' are rotated in synchronization with the traveling speed of the band knife 8.

The cutlery holding roller 55.55' described above is supported by the cutlery holding shaft 48.4 which is pivotally supported by the cutlery holding shaft support plate 40.44 and holds the double-edged band knife 8 from the width direction.
8' and above 49.49'.

Next, the means for rotating the double-edged band knife 8 will be explained. 59 is a worm wheel fixed to the lower part of the bottom plate 35, 60 is a worm that meshes with the worm wheel 59, and 62 is the axis of the worm. 6
A gear 63 meshes with the screw gear 62 fixed to the screw gear 1, and the rotation of the shaft 64 of the gear 63 rotates the worm 60, and the rotation of the worm 60 causes the worm wheel 59 that meshes with this As the worm wheel 59 rotates, the bottom plate 35 fixed to the upper part of the worm wheel 59 rotates, and the blade holding shafts 58 58 ′, 59 , 59 ′ and the blade holding holder installed on the bottom plate 35 rotate. The rollers 55, 55' also rotate, causing the double-edged band knife 8 to pivot.

Further, at the upper part of the side plate 54, 54' of the lower blade holding part, there are two supports 66 having a semi-cylindrical part with a slit 65, 65' formed in the upper surface part, into which the band knife 8 is inserted.
66' are arranged with their respective openings facing each other to support the workpiece 30.

Note that when the endless band knife 8 described above is wound around a pulley, it may be stored using not only a fixed pulley but also a movable pulley.

Since the embodiment of the present invention is configured as described above, the double-edged band knife 8 is run, the workpiece is moved in the Y direction, and the main body frame 1 on which the band knife 8 is wound and mounted is moved. If the moving double-edged band knife 8 is moved in the X direction, and the movements in the X and Y directions are controlled, and the workpiece 30 is cut while the traveling double-edged band knife 8 is rotated, the band knife 8 becomes double-edged. By controlling the movement of the workpiece in the Y direction and the main body frame 1 on which the band knife 8 is mounted in the X direction, the workpiece can be shaped into any shape. It is possible to cut the

Since the band knife 8 used for cutting is double-edged, there is a risk that the band knife may fall off from the hole due to the reaction force during cutting, but in this embodiment, the knife holding shaft 58.58' , 59 and 59' are made to protrude from both sides, and their tips intersect, and the band knife 8 is held at the intersection by being brought into contact with the slope of each cutting edge of the band knife 8. The knife 8 is held by the intersecting portions of the tips of the blade holding shafts 58, 58' and 59, 59', and does not fall off the pulley.
49' are rotated in synchronization with the running speed of the band knife 8, so that the friction between the band knife 8 and the respective holding shafts can be minimized.

Further, even if the blade portion becomes narrow due to cutting or polishing, the opposing blade holding shaft support plates 44 and 46, on which the blade holding shaft described above is disposed, are always urged in a direction toward each other. Therefore, the blade holding shaft can follow the jamming of the band knife 8, and furthermore,
The rollers 55 hold down the sides of the blade body of the band knife 8 from both sides.
55', so that the band knife 8 can be rotated smoothly. Furthermore, since the rotation of the presser rollers 55, 55' is synchronized with the running speed of the band knife 8, the rotation speed between the two is Friction can also be made extremely small.

Further, the blade holding shafts 48, 48', 4 are connected to each other via the respective pulling pieces 42 and 46 and the blade holding shaft support plates 46 and 44 which face each other coaxially with the screw shaft 500 mentioned above.
9°49' are moved in the direction of approaching each other, but the distance is such that, for example, if the width of the double-edged band knife 8 is 10 mm when new, the width of the blade will be approximately 5 mm due to cutting or polishing of the workpiece. Therefore, the moving distance of the blade holding shaft support plate 40 and the blade holding shaft support plate 44 disposed opposite thereto in the direction of approaching each other is 2.5 degrees. The blade holding shafts 48.48 are protruded in a stepped manner from each of the blade holding shaft holding plates 40.44, and intersect at the tips.
' and 49. 49' fully double-edged band knife 8
It is also possible to hold the blade from the direction of the blade.

〔Effect of the invention〕

The automatic cutting machine of the present invention moves an endless double-edged band knife that runs orthogonally to a table on which a workpiece is placed, to a plane that includes the table surface within a range that runs orthogonally to the table. The workpiece is automatically cut into the desired shape by the rotation of the double-edged band knife and the controlled movement of the main body frame on which the workpiece and the double-edged band knife are mounted. be.

When cutting the workpiece, a cutting reaction force acts on the band knife, but in the present invention,
A blade holding shaft is rotatably supported on each of the blade supporting shaft support plates, which are always biased in the direction of approaching each other, in a stepped manner so that their tips intersect. Since the double-edged band knife is held from both sides in the direction of the blade by making contact with the slope of each blade edge of the band knife, there is no risk of the band knife falling off from the pulley etc. due to reaction force during cutting. Since the side surfaces of the blade body of the band knife are held between both sides by pressing rollers, the above-mentioned turning can be easily performed.

Furthermore, since the rotation of each of the blade holding shafts and presser rollers described above is synchronized with the running speed of the band knife, the friction between them is extremely small, and cutting by the running band knife can be performed without any problem. It is.

Since the shaft support plates for holding the blades disposed facing each other are biased toward each other, even if the blade portion of the double-edged band knife narrows during cutting or polishing, each of the blades will be retained. The blade holding shafts, which are arranged in different steps on the shaft support plate and whose tips intersect with each other, can sufficiently follow the pinching of the blade part.

[Brief explanation of the drawing]

1 to 7 of the drawings show an embodiment of the automatic cutting machine of the present invention, where FIG. 1 is an overall perspective view, FIG. 2 is an explanatory diagram of the blade holding section, and FIG. 3 is an explanation of the blade holding state. Figure 4 (a) is a perspective view of the fabric supporter, ([ri is a perspective view of the cloth supporter in a clamped state by the presser rollers, and Figure 5 (a) is a perspective view of the rotating part by the worm and worm wheel, (rl) Figure 6 is an assembled sectional view of the blade holding part and blade rotation part, Figure 6 is an explanatory diagram of installation of the workpiece, Figure 7
The figure is a sectional view of a workpiece mounting plate and a moving rod, and FIG. 8 is an explanatory diagram of a conventional cutting machine. Main body frame 7,7. ．． 7□: Pulley 8: Band knife 10: Table 35: Bottom plate 40.44: Shaft support plate for holding knife 4L 41', 45.45': Bending piece 42.4
6: Pulling circumferential piece 50: Screw shaft 48, 48', 49.49': Cutting tool holding shaft 5
5, 55': Presser roller 59: Worm wheel 60: Worm Patent applicant Asahi Engineering Co., Ltd. Figure 3

Claims (1)

[Claims] A means for causing an endless double-edged band knife to run orthogonally to a table on which a workpiece is placed, and for rotating the band knife with respect to a plane including the table surface within a range in which the band knife runs orthogonally to the table. and has a presser roller that clamps the side surface of the blade body of the double-edged band knife during the rotation, and the blade holding shaft support plates, which are biased in a direction approaching each other, are arranged such that they intersect at their tips. The knife holding shafts are rotatably supported at different levels, and the intersecting portions of the distal ends of the knife holding shafts arranged at different levels are brought into contact with the slopes of the respective blades of the double-edged band knife. An automatic cutting machine characterized in that a presser roller and a blade holding shaft are rotated in synchronization with the traveling speed of the band knife.