JPH108100A - Device for processing leather and processing therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leather-processing device capable of simply producing many kinds of leather products in small amounts respectively at low costs, and to provide a method therefor. SOLUTION: A knife 17 oscillated with supersonic waves is controlled and moved based on numeric information to cut a leather 10 (natural leather or artificial leather). The height of the blade edge of the knife 17 oscillated with the supersonic waves can be controlled to shallowly notch the surface of the leather 10 with the blade of the knife without cutting the leather 10, thereby enabling to form a pattern on the surface of the leather. A punching mechanism 19 is used for forming designed small holes on the leather, and a drawing mechanism 21 is used for drawing a part information such as a part number on the surface of the leather 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an apparatus or a method for processing natural leather or artificial leather.

[0002]

2. Description of the Related Art Conventionally, leather cutting is performed by hand cutting (for small-scale production such as trial production), cutting with a punching die (for mass production), forming a decorative hole, marking with a silver pen, and the like. Processing is performed manually by a skilled technician.

[0003] Recently, in the field of cutting,
Computer-controlled cutting using ultra-high pressure water and computer-controlled cutting using a laser have also been performed in part.

[0004]

In recent years, cutting by hand has become difficult due to a decrease in the number of skilled technicians, and cutting by cutting dies has to produce a large number of cutting dies for parts. However, it takes a long time to manufacture and the price is becoming expensive. For this reason, it has become difficult to meet customer requests in terms of delivery date and price.

For example, taking the processing of shoes as an example, regarding one model, there are about 8 to 10 parts (small pieces of leather constituting shoes) for one size, and about 8 to 12 kinds of sizes. As a result, there are eventually more than 100 parts, and therefore, more than 100 punching dies must be manufactured, which is a heavy burden. In particular, sample prototypes are not mass-produced, so the burden of manufacturing punching dies is large. For sample models, automation of cutting is strongly desired.

On the other hand, cutting using ultra-high pressure water or laser is suitable for mass production, but is not suitable for recent small lots.
In addition, a processing apparatus using ultrahigh-pressure water requires water treatment equipment and noise countermeasures, and laser processing has problems in that the cut edge of the skin is discolored and odor countermeasures are required.

Further, in the shoe manufacturing apparatus, the cutting of the outer shape, the drilling of a small diameter, and the marking with a silver pen are currently performed individually. A dual-purpose mold is very expensive.

[0008] Recently, it has also been desired to form a pattern by incision such as half-cut on the surface of leather, but such processing is extremely difficult with a conventional die.

The present invention has been made in view of the above points, and an object of the present invention is to provide a processing apparatus and a method capable of easily and inexpensively producing various kinds of leather products in small quantities.

[0010]

In order to solve the above-mentioned problems, in the present invention, the cutting edge of a knife to which ultrasonic vibration is applied is controlled based on numerical information to cut natural leather or artificial leather. I did it.

Instead of cutting the leather with an ultrasonic vibration knife, it is also possible to control the height of the cutting edge and cut the surface of the leather shallowly with a knife blade to form a pattern.

Furthermore, by adding a punching mechanism for forming small holes in leather or a perforation mechanism for providing perforation marks on leather, punching and perforation can be automatically performed. Similarly, a drawing mechanism for writing part information such as a part number on leather may be provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below by taking a processing apparatus for shoemaking as an example. However, it goes without saying that the present invention can be applied to a processing device for other leather products (such as handbags).

FIG. 1 is an overall view of a processing apparatus for shoemaking showing an example of the present invention. The processing apparatus 1 comprises a table 3 and a table 3.
The guide means 5 provided on the upper part and the guide 3
And an arm 7 that moves upward in the Y direction. A moving member 9 which is movable on the arm 7 in the X direction is provided on the arm 7.
A tool mounting plate 11 on which a processing tool described later is mounted is mounted on the moving member 9 so as to be movable in the Z direction.

The guide means 5 is composed of, for example, a flat belt or a ball screw, and is connected to the end of the arm 7 to move the arm 7 in the Y direction. A motor 13 is attached to one end of the arm 7, and the moving member 9 is moved by the motor 13 in the X direction via, for example, a belt or a ball screw. The tool mounting plate 11 is moved in the Z direction with respect to the moving member 9 by a driving force of a motor or the like by a transmission mechanism (not shown) such as a belt or a ball screw.

FIG. 2 is a front view of the tool mounting plate 11,
A motor 15, an ultrasonic knife unit 17, a punch unit 19, and a drawing tool unit 21 are mounted on the tool mounting plate 11 in order from the right.

The ultrasonic knife section 17 includes an ultrasonic vibrator 17.
a, a horn 17b, and is fixed to the tool mounting plate 11 by a cubic frame 23. A knife blade 17c is attached to the tip of the horn 17b. Knife blade 1
Ultrasonic vibration of about 28 kHz to 38 kHz is applied to 7c. A gear 25 is mounted around the vibrator 17a, and the gear 25 is connected to the motor 15 via gears 27 and 29, and the vibrator 17a is rotated by the motor 15, whereby the blade 17c also moves in the θ direction (arrow A). ). An air cylinder 17d is provided at the upper end of the knife section 17, and the cylinder 17d is driven by air supply from an air pipe 31, whereby the vibrator 17a,
The horn 17b and the blade 17c move in the vertical direction (Z direction).

The punch 19 has a collet chuck 19a at an end thereof, and a punch 19b is attached to the end of the collet chuck 19a. A concave portion is formed at the tip of the punch 19a as shown by a broken line in FIG. 2, and the blade of the punch has an annular shape. The punch portion 19 is fixed to the tool mounting plate 11 by a holder 33, and a motor 19c is mounted on an upper portion thereof.
Rotates as shown by arrow B. By providing this rotation, extremely smooth drilling becomes possible. The number of revolutions of the punch depends on the material of the leather, but is, for example, 500 to 30,000 r.
pm. The air cylinder 1 is located at the top of the punch 19.
9d is attached, and the air cylinder 19d is connected to the air pipe 35.
Driven by the air supply from the
9b moves in the vertical direction (Z direction).

The drawing tool unit 21, as shown in FIG.
A silver pen 21a, a support member 21b for the silver pen 21a, and a moving coil 21 disposed at an end of the support member 21b.
When the moving coil 21c is excited, the silver pen 21a moves in the Z direction together with the support member 21b.

Now, the processing apparatus 1, as shown in FIG.
The leather 10 is placed on the adhesive silicone rubber 37 and processed. FIG. 4 is a sectional view of a cut portion of the leather 10, and an adhesive silicone rubber 37 is laid via a nonwoven fabric plate 41 on a vacuum chamber 39 formed of an aluminum plate. A number of small holes 39a, 37a are formed in the upper plate of the vacuum chamber 39 and the adhesive silicon rubber 37, respectively. When the vacuum pump 43 is driven, the leather 10 is vacuum-adsorbed. Further, the adhesive is more firmly adsorbed by the adhesive effect of the adhesive silicone rubber 37. Thereby, it is possible to reliably prevent the leather 10 from peeling off and splashing from the board surface due to air leakage from the cut surface at the time of cutting.

Conventionally, when a soft material such as leather 10 is processed, it is generally merely cut on a processing table. However, in this case, the workpiece is warped or turned and fixed on the table. Therefore, accurate processing (cutting, punching, etc.) has been difficult. Therefore, as shown in FIG. 4, the leather 10 is attached to the adhesive member 37 having small holes.
If it is vacuum-adsorbed through (adhesive silicon rubber or the like) and fixed on the table, it can be firmly fixed and accurate processing becomes easy. The material to be processed is not limited to leather, and this technique can be applied to a case where another material is fixed as long as it is a soft and sheet-like material such as leather. In addition, the nonwoven fabric plate 41 shown in FIG. 4 is not an essential member and can be omitted.

FIG. 5 is a schematic block diagram of a control system of the present processing apparatus. The control device 50 is, for example, a personal computer, and includes a CPU, a memory, and the like. Control device 5
0 is input with parts information 51, outer shape data 53, punch data 55, and pattern data 57. The part information 51 includes information on individual parts (part number, lot number, insertion allowance, alignment allowance, etc.) and information on a position where these parts information should be entered. It is. Punch data 5
5 includes data of a position to be punched, etc., and the pattern data 57 includes shape data of a pattern to be applied to leather, cut depth information, and the like.

Based on the input data, the controller 50 controls each of the actuators 1 shown in FIG. 5 so that the knife blade 17c and the punch 19b are located at positions corresponding to the data.
7d, 19d, 59, 13, 61, 21c, 15, 19
control c. In FIG. 5, a motor 59 is a motor for driving the tool mounting plate 11 in the Z direction, and a motor 61 is a motor for driving the guide means 5 in the Y direction.

FIG. 6 is a flowchart showing the operation of the processing apparatus 1, and FIG. 7 shows an example of processing one part.
7, the operation of the above device will be described.

First, the processing apparatus is operated by the parts information 10 shown in FIG.
A is entered (step 601). At this time, the tool mounting plate 11 is moved in the X and Y directions, and the part information 10a shown in FIG.
Is placed at the position to be filled. After that, the moving coil 21c is driven, and the silver pen 21a is lowered, so that the leather 1
0 while pressing the tool mounting plate 11 against the part information 51.
It is moved according to (FIG. 5), and the part information 10a of FIG. 7 is entered.

Next, the processing apparatus performs a punch for forming a hole 10b in the part (step 602). That is, first, the air cylinder 19d is operated to lower the punch 19a (in this state, the punch 19a does not hit the leather 10),
Next, the tool mounting plate 11 is driven in the X and Y directions and moved to a position where punching is to be performed. In the meantime, the motor 19c is rotated, and when the punch position is reached, the motor 59 is driven to lower the tool mounting plate 11 to perform punching. By repeating the same operation, a plurality of holes 10b can be formed.
Since the punch 19b is mounted by the collet chuck 19a, it can be easily attached and detached, and the diameter of the hole 10b can be easily changed by replacing the punch 19b.

When the punching is completed, the pattern 10c
(Step 60)
3). The half cut is a process of cutting the leather 10 at a predetermined depth from the surface so that a pattern can be formed on the surface, not cutting until the leather 10 is cut. Therefore, the motor 59 is driven to lower the tool mounting plate 11 to a position predetermined by the pattern data 57, and the tool mounting plate 11 is moved to the position of the pattern 10c. Next, air cylinder 17d
Is driven to lower the knife portion so that the cutting edge 17c is
And the cutting edge 17c is moved in the X, Y, and θ directions based on the pattern data 57 to form the pattern 10c.

Finally, the leather 10 is cut along the outer shape 10d shown in FIG. 7 (step 604). At this time, the motor 5
9 is driven to lower the tool mounting plate 11 from the half cut. Then, the air cylinder 17d is driven to lower the knife portion, and the cutting edge 17c is moved in the X, Y, and θ directions based on the outer shape data 53 to cut the leather 10 along the outer shape 10d. Since the leather 10 is firmly fixed by the adhesive rubber 37 and does not warp, the cutting is performed accurately.

In the above apparatus, a perforation process for providing perforation marks on leather can be performed by using perforation needles instead of the punches 19b. When the punch size is large, a large number of punch heads can be mounted, and a plurality of punch heads can be controlled based on the respective position information.

FIG. 8 is a view showing another method for fixing the leather 10. As shown in FIG. For the sake of explanation, the leather 10 is shown with a part outline to be cut or a half-cut pattern.

The leather 10 is placed on an adsorbent sheet 81 (adsorbent side), and a transparent sheet 83
The leather 10 can be easily fixed by covering with. When cutting or half-cutting, the transparent sheet 83 is cut together with the leather 10. As the adsorptive sheet 81, for example, a sucker printing sheet (for example, a product name “QVAN sheet” manufactured by Resin Printing Co., Ltd.) in which a suction cup is printed on the surface of a soft vinyl (or paper) sheet can be used. This product is obtained by printing a mesh-like pattern having a thickness of 60 to 70 μm on a sheet having a thickness of 0.2 mm by screen printing, for example, and the swelling of ink retains air and plays a role of a suction cup.

The transparent sheet 83 may be an adsorptive sheet or a sheet having no adsorptive property. If a transparent sheet 83 having an adsorbing property is used, the fixing force increases. Also, without using the transparent sheet 83, the suction sheet 8
The leather 10 can be fixed with only one. In any case, if the above method is used, the attachment / detachment on the suction sheet 81 is easy, so that the work of positioning, fixing, and removing the leather becomes extremely easy.

In order to fix the suction sheet 81 on the apparatus, the suction sheet 81 may be fixed by vacuum suction, or suction suction printing or the like may be performed on the back surface of the suction sheet 81 to impart the suction property. May be adsorbed on the panel surface of the apparatus.

Further, if the leather is sandwiched and fixed between the suction sheet 81 and the transparent sheet 83, the fixing force is increased as described above. Therefore, as shown in FIG. And the processing capacity of the processing apparatus is greatly increased.

The above method is not limited to leather, and can be applied to a case where another material is fixed as long as it is a soft and sheet-like material such as leather.

[0036]

As described above, according to the present invention,
Since a punching die is not used as in the related art, an effect is obtained in that even small-volume small-scale processing of leather products can be easily and inexpensively manufactured.

Further, by adjusting the height of the ultrasonic vibration knife, a pattern can be easily and accurately formed on the surface of the leather.

Further, by adding a punch mechanism or perforation mechanism for forming small holes in the leather, punching or perforation can be performed easily and in a short time simultaneously with the cutting.

Similarly, by adding a drawing mechanism for writing part information such as part numbers on leather, it is possible to obtain an effect that a marking operation indispensable for the production of leather products can be automated with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an overall view showing an example of an embodiment of a leather processing apparatus according to the present invention.

FIG. 2 is an enlarged front view of a tool mounting plate of the leather processing apparatus.

FIG. 3 is a side view of the drawing tool.

FIG. 4 is a sectional view of a leather suction mechanism.

FIG. 5 is a schematic block diagram of a control system of the leather processing apparatus.

FIG. 6 is a flowchart showing the operation of the leather processing apparatus.

FIG. 7 is a diagram showing an example of a processed part.

FIG. 8 is a perspective view showing an example of a method of fixing leather by a suction sheet.

FIG. 9 is a cross-sectional view showing an example of a method of fixing leather by an adsorption sheet.

[Explanation of symbols]

 1 Processing Equipment for Shoe Making 17 Ultrasonic Knife 19 Punch 21 Drawing Tool

Claims (9)

[Claims] 1. A knife for cutting natural leather or artificial leather, means for applying ultrasonic vibration to the knife, and movement control means for controlling movement of the knife based on numerical information. Leather processing equipment. 2. The leather processing apparatus according to claim 1, wherein the movement control means controls the movement of the knife so that the knife forms a pattern on the surface of the leather based on the pattern data. 3. The leather processing apparatus according to claim 1, further comprising a punch mechanism for forming a small hole in the leather or a perforation mechanism for giving a perforation mark to the leather. 4. The leather processing apparatus according to claim 1, further comprising a drawing mechanism for writing part information such as a part number on the leather. 5. The leather processing apparatus according to claim 1, wherein the leather is vacuum-adsorbed through an adhesive member having a small hole and fixed on the apparatus. 6. The leather processing apparatus according to claim 1, wherein the leather is fixed using an adsorption sheet. 7. The leather according to claim 1, wherein the leather is shoemaking leather.
A leather processing apparatus according to any one of claims 1 to 6. 8. A leather processing method characterized by cutting a natural or artificial leather by controlling the movement of a knife edge given ultrasonic vibration based on numerical information. 9. The leather processing method according to claim 8, wherein a pattern is formed on a surface of the leather by the knife.