JP3125133B2 - Press cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a knitted fabric, a nonwoven fabric,
More specifically, it relates to a press cutting machine that cuts a mold piece from a sheet material such as artificial leather. The present invention relates to a press cutting machine that enables cutting with a scale.

[0002]

2. Description of the Related Art An automatic press cutter is configured as a means for efficiently cutting a large number of identical pieces in accordance with a preset program. However, with the recent diversification of fashion, production of many types and small quantities is inevitable, and die pieces must be cut in small lots. Therefore, the automatic press cutter must be stopped every time the lot is changed, and the control unit must be input to change the set value so as to correspond to each lot. However, it takes a lot of time and effort to stop these machines and change the set values. Therefore, frequent work reduces the benefits of automatic operation, which in turn lowers productivity. Had occurred.

[0003] In addition, in order to form a mold piece by an automatic press cutter, the following procedure is generally performed. For example, as shown in FIG. 7, when a plurality of pentagonal mold pieces M are cut on a fabric F, a plurality of pentagonal mold pieces M are arranged in the width W of the fabric F at a horizontal pitch p ₁ as the first first row I. The mold pieces M are cut so as to be accommodated therein, and then the second row II reverses the direction of the mold pieces M by about 180 ° with respect to the direction of the mold pieces in the first row I, and sets the apex angle of the pentagon in the first row. shifting the horizontal pitch so as to be interposed between the two mold halves M of adjacent eyes I distance e, and the vertical pitch p _a where brought near to the front side as possible, the same horizontal pitch a plurality of mold pieces M p
Cut at _1, further third row III is allowed to direction about 180 ° inversion again mold halves M, with shifting the horizontal pitch distance e, and the vertical pitch p _b packed as possible in the longitudinal direction, just like cutting a plurality of mold pieces M in horizontal pitch p ₁ and described above. Thereafter, the above is repeated from the fourth column IV onward.
Cutting is performed so that the scale is reduced as much as possible.

However, the vertical pitch p _a ,
Even if _pb is changed or the horizontal pitch is shifted by the distance e to reduce the required scale, the even-numbered row (FIG. Column
II, the margins S at both ends of the fourth column IV) are always formed, and these margins S are usually discarded as cutting waste.

If an attempt is made to form a mold piece from the margin S by an automatic press cutter, for example, an image sensor for reading the size of the margin S must be attached, or an arithmetic unit having a sophisticated calculation function must be provided. Must.
Furthermore, in order to operate such advanced machines, it is necessary to assign a technician capable of utilizing advanced technology as a driver. Therefore, the price of the automatic press cutting machine is inevitably high and the operating cost is also high, so that the cost cannot be clearly compensated as a press cutting machine for cutting small lots of various kinds and small quantities.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is not only to cut a large number of mold pieces of the same type, but also to use a small amount of blanks generated by standard cutting even when cutting small lots of various kinds and small quantities. An object of the present invention is to provide a press cutting machine which can perform cutting without any trouble and is easy to operate.

[0007]

In order to achieve the above object, a press cutting machine according to the present invention is provided with a cutting blade mold mounted above a movable table on which a sheet material to be cut is placed and which can be moved in the longitudinal direction. To move left and right and rotate and push around the vertical
A press head that performs a press operation, and moves the front and rear pitches of the moving table and the left and right pitches of the press head.
An automatic operation for performing fixed cutting of the sheet material to be cut in accordance with a preset program for movement, rotation around a central axis, and press operation ; and arbitrary movement of the moving table independently of the automatic operation. Forward and backward to the position and the press head
It is characterized in that it can be switched between left and right movement to an arbitrary position, rotation around a center axis, and manual operation for performing a press operation .

As described above, since both functions of the automatic operation and the manual operation are provided so as to be switchable, the mass cutting of the fixed mold pieces can be efficiently performed by the automatic operation, and is generated by the automatic cutting of the fixed form. When the automatic cutting is performed, and the program or the like becomes too complicated in the automatic cutting, the cutting can be efficiently performed by the manual operation of moving the moving table or the press head to an arbitrary position.
At the time of the manual operation, if necessary, the blade can be selectively replaced with a blade suitable for the size of the margin, and the blade can be cut without wasting a necessary length.

In the case where a cutting blade having a support plate made of a transparent resin is used as the cutting blade, when the margin is cut manually, the transparent supporting plate is seen through the blade. Since the mold can be visually recognized directly, even a small margin can be cut quickly and accurately, and the effect of reducing the required size can be further improved. Also, a mounting mechanism of the cutting blade die to the press head is provided such that a flange portion is provided on the press head, and a holding plate that operates up and down is attached to the flange portion, and the cutting blade die is detachably mounted by the holding plate. In this case, the detachability of the cutting blade from the press head during manual operation makes it possible to easily and quickly cope with the work due to the ease of attachment and detachment, and is performed while switching between automatic operation and manual operation. Cutting workability can be significantly improved.

[0010]

1 and 2 show a press cutter according to an embodiment of the present invention. FIG. 1 is a front view of the press cutter, and FIG. 2 is a side view. In the figure, a moving table 30 is provided so as to move back and forth on a base 20 fixed on the floor, and a plurality of cloths (sheet materials to be cut) are stacked and placed on the upper surface of the moving table 30. ing. In addition, columns 21 and 21 are attached to both left and right sides of the base 20, and a cross beam 22 is provided laterally so as to straddle between upper ends of the columns 21 and 21. On the cross beam 22,
A press head 24 is suspended from the support portion 23, and a cutting blade G is mounted on a lower end portion of the press head 24.

The press head 24 reciprocates right and left through a support 23 along a rail 26 provided along the longitudinal direction of the cross beam 22. In addition, cross beam 2
2, a ball screw 27 is internally provided so as to be driven by a servomotor 29, and a ball nut 28 is screwed into the ball screw 27 to form a lateral movement mechanism. The support portion 23 is connected to a ball nut 28 of the lateral movement mechanism so as to reciprocate left and right.

A hydraulic cylinder 23c is provided in the support portion 23, and the press head 24 is provided by the hydraulic cylinder 23c.
Moves up and down toward the moving table 30, and presses the cloth on the moving table 30 by the cutting blade die G at the lower end. The press pressure of the hydraulic cylinder 23c can be finely adjusted in the range of ² to 15 t / cm ² by adjusting the hydraulic pressure. Therefore, by adjusting the pressing pressure in accordance with the number of laminated fabrics, it is possible to prevent the cutting blade die from being damaged.

An air cylinder 25 is attached to the side of the press head 24. By the reciprocating operation of the air cylinder 25, the press head 24 reciprocates between 0 ° and 180 ° around the center axis in the vertical direction, so that the cutting blades G are alternately inverted by 180 °. ing. A servo motor may be used instead of the air cylinder 25 as a drive source for inverting the cutting blade die G as described above. Since the servomotor can be stopped at an arbitrary rotation angle, the press head 24
(Accordingly, the cutting blade die G) can be stopped at an intermediate angle between 0 ° and 180 °. Therefore, it is advantageous for a press cutter for cutting a nonwoven fabric, artificial leather, or the like in which the orientation of the fibers constituting the fabric is not directional.

A moving table 30 on which a cloth to be cut is placed
Is mounted on a fixed table 30 'provided on the base 20 so as to slide in the front-rear direction. A ball screw 3 extending in the front-rear direction is provided inside the fixed table 30 '.
1 is provided so as to be driven by a servomotor 33, and a ball nut 32 is screwed into the ball screw 31 to form a forward / backward moving mechanism. Moving table 30
Is connected to the ball nut 32 of the mechanism for moving back and forth and moves back and forth.

Behind the fixed table 30 ', an extension table 38 is provided.
Are provided so that excess cloth that cannot be placed on the moving table 30 is supported. Moving table 30
If necessary, a rubber sheet 35 that supports the cut fabric from below can be arranged as shown in the drawing. By arranging such a rubber sheet 35, the impact force applied to the cutting blade die G at the time of press cutting can be reduced, and the blade die can be prevented from being damaged. If necessary, a flexible cover 36 may be connected to the rear end of the movable table 30. By providing such a flexible cover 36, dust does not accumulate on the surface of the fixed table 30 'because the flexible cover 36 always covers the surface of the fixed table 30' regardless of the position of the moving table 30. You can do so.

The press cutter according to the present invention has the above-described configuration and is provided so that both functions of automatic operation and manual operation can be switched. The automatic operation is performed according to a program preset in a control panel 37 in which a microcomputer is provided, and is activated by turning on an automatic operation switch 41 provided at the front end of the fixed table 30 '. The horizontal pitch movement of the press head 24 is controlled by the rotation speed of the servomotor 29, and the press operation is performed by activating the hydraulic cylinder 23c. The vertical pitch movement of the moving table 30 is controlled by the rotation speed of the servo motor 33. Therefore, in the automatic operation, the values of the desired horizontal pitch and vertical pitch for each lot, for example, for the operation of the press head 24, the horizontal pitch p ₁ described in FIG. When control information such as a pitch shift e and the necessity of head reversal and control information such as vertical pitches p _a and p _b for the operation of the moving table 30 are input to the control panel 37, the control information becomes Accordingly, the servo motors 29 and 33 are set to the horizontal pitch,
After rotating the press head 24 by the set horizontal pitch while rotating by the number of rotations corresponding to the vertical pitch, the press operation is performed for each pitch movement, and the moving table 30 is moved by the vertical pitch only after cutting one horizontal row of mold pieces. Move.

In the present invention, the control of the automatic driving is performed by:
For example, the program is limited to a simple program for cutting a fixed mold piece as shown in FIG. 7, and does not include a special program that requires complicated control for cutting a margin or the like generated after performing the fixed cutting. By limiting the automatic operation to only a simplified program in this way, an image sensor and an advanced arithmetic unit are not required, so that the cost of the press cutter can be reduced.

Since the press cutting machine of the present invention is also capable of manual operation irrespective of automatic operation, automatic operation requires a complicated control program such as the above-mentioned margin S. In addition, the present invention can be carried out easily by manual operation and without wasting the required scale. In this manual operation, if the control system of the control panel 37 is shut off and the servo motors 29 and 33 are rotated by an arbitrary number of rotations by operating a switch (not shown), the press head 24 and the moving table 30 are moved by an arbitrary distance. Can be set at any position. The press operation of the press head 24 can be performed by simultaneously pressing a pair of switches 40 provided on the press head 24.

The manual press operation is activated only when the two left and right switches 40, 40 are simultaneously operated with both hands. That is, even if only one switch 40 is turned on with one hand, the press head 2
4 is not activated. With such a switch configuration, it is possible to prevent an accident in which the operator has one hand caught in the press head 24.

As another countermeasure for preventing accidents during operation, in addition to the switches 40, 40, photoelectric sensors 42, 42 are provided on a pair of left and right columns 21, 21 so as to face each other. Photoelectric sensor 42,
The press cutter is stopped when the light passing between the spaces 42 is blocked by a human body or the like. That is, a light-emitting element 42a is provided on one side of the photoelectric sensor 42, and a light-receiving element 42b is provided on the other side. When the projection light passing between the light receiving element 42a and the light receiving element 42b is cut off, the press cutter is completely stopped.

FIGS. 3A and 3B show a mechanism for mounting the cutting blade G provided at the lower end of the press head 24 described above. FIG. 3A is a front view, and FIG. 3B is a side view. In the mounting mechanism of the cutting blade die G, a flange portion 43 is integrally formed at the lower end of the press head 24, and four air cylinders 44 are mounted, one at each of the four corners of the flange portion 43. In front view,
One holding plate 46 is provided at each of the lower ends of the piston rods 45 extending from the air cylinders 44 provided at the two front left and right positions and the lower ends of the piston rods 45 extending from the air cylinders 44 provided at the two front right positions. , 46 are fixed, and slits 47, 47 are formed between the holding plates 46, 46 and the flange 43, respectively.

When compressed air is supplied to the air cylinder 44, the holding plate 46 moves upward to narrow the slit 47. Therefore, if both ends of the support plate 1 of the cutting blade G are inserted into the left and right slits 47 and 47 from the front and the compressed air is supplied to the air cylinder 44 to move the piston rod 45 upward, the support plate 1 Is fixedly held.
Conversely, when the compressed air is released, the holding plate 46 is lowered to release the gripping of the cutting blade die G, and the cutting blade G can be pulled out forward.

The air cylinder 44 for driving the holding plate 46 may be a single-acting type that supplies compressed air to only one chamber of the piston, or a double-acting type that alternately supplies compressed air to both chambers of the piston. Is also good. In the case of a single-acting type, compressed air is supplied to the chamber on the side where the piston rod 45 is moved upward.
According to the mounting mechanism of the cutting blade die G described above, unlike the conventional mounting mechanism using a bolt and nut, a tightening operation and a loosening operation using a wrench or the like are completely unnecessary, and the air cylinder 44 is not required.
By simply raising and lowering the holding plate 46, the cutting blade G can be attached or detached in a short time with one touch.

The manual operation of the press cutter is performed by using a cutting blade G
May be carried out in a state where it is mounted on the mounting mechanism of the press head, but may be carried out in a state where it is detached from the mounting mechanism as shown in FIG. That is,
As shown in FIG. 6A, the cutting blade die G detached from the mounting mechanism.
6 is placed on the fabric F, and the press head 24 is pressed through the holding plate 46 from above the cutting blade die G.
The mold piece M can be cut as shown in FIG. In particular, when cutting the margin S limited to a specific position on the cloth F, first, the cutting blade die G removed from the mounting mechanism is placed on the margin S, and the press head 24 is cut from above. It is good to make it work. That is, since it is extremely easy to accurately place the cutting blade die G on the margin S at the specific position by hand, the margin S at the specific position is easily and accurately cut by such manual cutting. be able to.

The cutting blade used in the press cutter according to the present invention is not particularly limited, but is preferably one shown in FIG.
And it is desirable to use a structure as shown in FIG. 5, and this can be particularly advantageous in the case of a press cutter that can be used in combination with manual operation as described above. FIG. 4 is a perspective view of a cutting blade mold, and FIGS. 5A and 5B are cross-sectional views of a main part. In these figures, a cutting blade die G is configured by fixing a blade die 1 to a support plate 2 made of a transparent resin with an adhesive 11. The blade die 1 is configured to bend the strip-shaped steel thin plate 3 in a longitudinal direction into a predetermined cutting die, and to form a single-edged blade 1a at the opening side edge of the steel thin plate 3 (FIG. 5 ( B)).

A connecting plate 4 made of a steel thin plate is welded to the outside of the butted portion at both ends of the steel thin plate 3 so as to be joined. A blade 1b composed of a single blade on the upper edge side of the connection plate 4.
Is formed at the joint portion with the steel thin plate 3 so as to form the blade 1a of the steel thin plate 3 and both the blades. Further, a reinforcing material 5 such as a transparent resin is stretched inside the blade die 1 so as to connect the inner wall surfaces, so that the blade die shape is stabilized.

In the illustrated cutting blade die G, a grounding conductive wire 6 is connected to the blade die 1, and this conductive wire 6 extends to the outside of the support plate 2 and is connected to a groundable metal part. It is to be connected. Since the static electricity can be prevented by an antistatic agent or the like, the ground conductive wire 6 is not always required. Therefore, it is only necessary to selectively attach to the cutting blade mold of the cloth which is particularly easily charged with static electricity.

As described above, the cutting blade die G made of the steel thin plate 3 can cut with high dimensional accuracy without causing displacement or wrinkles even with a soft and thin cloth. Further, since the support plate 2 is made of a transparent resin, when the cutting blade die G is placed on the fabric during manual operation, the lower blade die 1 can be seen through from the upper surface of the support plate 2. Therefore, when a margin S having a small area is to be molded, cutting can be quickly and reliably performed while checking the position by seeing through the margin S.

Although the above-described embodiment mainly describes the case where the cloth is cut, the press cutting machine of the present invention is applicable to the cutting of other sheet materials such as non-woven fabric and artificial leather other than the cloth. Can also be applied.

[0030]

As described above, the press cutter according to the present invention has a semi-automatic operation structure capable of performing both automatic operation and manual operation. Move the moving table or press head to any position by manual operation even when cutting the margins that occur in automatic operation, such as the margins that would complicate the cutting program in automatic operation. As a result, cutting can be performed easily and without wasting the required size.

[Brief description of the drawings]

FIG. 1 is an exemplary front view of a press cutter according to the present invention.

FIG. 2 is a side view of the press cutter of FIG.

3A and 3B show a cutting blade mounting mechanism in the press cutter of the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a perspective view illustrating a blade mold used in the press cutter of the present invention.

5A is a cross-sectional view taken along line AA of FIG. 4, and FIG. 5B is a cross-sectional view taken along line BB of FIG.

FIGS. 6A and 6B are views showing a state when the cutting blade die is removed from the press cutting machine of the present invention and cutting is performed. FIG. 6A is an explanatory diagram before cutting, and FIG. 6B is an explanatory diagram at the time of cutting.

FIG. 7 is a plan view showing an example of molding from fabric.

[Explanation of symbols]

 Reference Signs List 20 base 21 support 22 cross beam 23 support 23c hydraulic cylinder 24 head 30 moving table 37 control panel 41 switch (for press operation of head) G blade for press cutting

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takeshi Ken Saito No. 1 Nishinouchi, Omori, Fukushima City Inside Fukushima Wakoru Sewing Co., Ltd. (56) References JP-A-5-147000 (JP, A) JP-A-3-27825 (JP, A) JP-A-5-237800 (JP, A) JP-A-54-17588 (JP, A) JP-A-62-230431 (JP, A) JP-A-56-50732 (JP, A) 61-1240 (JP, U) JP 1-60726 (JP, U) JP 6-4240 (JP, B2) JP 51-45113 (JP, Y2) (58) Int.Cl. ⁷ , DB name) B26F 1/38 B26D 5/00 B26F 1/44 B21D 43/26 B21D 37/14 B21D 21/14 B21D 28/34

Claims (4)

(57) [Claims] 1. A above the movable movable table in the longitudinal direction by placing the object to be cut sheet, left wearing the cutting blade type
A press head for rightward movement, rotation about a vertical center axis, and press operation is vertically installed, and a front-back pitch movement of the moving table, a left-right pitch movement of the press head , and a center axis circumference are provided.
Automatic operation for performing fixed cutting of the sheet material to be cut in accordance with a preset program for turning and pressing operation , moving the moving table back and forth to an arbitrary position regardless of the automatic operation, and pressing the press head. Left to any position
A press cutter capable of switching between rightward movement, rotation around a central axis, and manual operation for performing press operation . 2. The press cutting device according to claim 1, wherein the cutting blade die is formed by fixing a blade die formed by bending a strip-shaped steel thin plate provided with a blade on one side edge to a support plate made of transparent resin. Machine. 3. A press head having a flange portion,
The press according to claim 1 or 2, wherein the holding plate is attached to the flange portion via a slit so as to move up and down, and the cutting blade is inserted into the slit so that the holding plate can be detached by the up and down operation of the holding plate. Cutting machine. 4. The press cutter according to claim 3, wherein the holding plate is driven up and down by an air cylinder.