JP2013231143A - Method for manufacturing leather goods and apparatus for manufacturing leather goods - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leather goods which are defective goods with occurrence of a defect due to a natural mark on cut leather goods from outflowing.SOLUTION: A method for manufacturing leather goods includes: a leather photographing step S5 of photographing a leather 10 which is subjected to substrate working S3 and on which a natural mark 12 is apparent; a leather finish working step S7 of finish working the leather; and a leather cutting step S11 of cutting the leather which has been finished working in the leather finish working step by using an image photographed in the leather photographing step so as to avoid the natural mark formed on the leather.

Description

  The present invention relates to a leather product generation method and a leather product generation apparatus, and more particularly to a method for generating a leather product while avoiding natural marks.

  As shown in FIG. 6, conventional leather production is performed by preparing wet blue (W / B) or wet white (W / W) leather (S201), and processing the base material (tanning, etc.) on this leather (raw material). To generate leather (S203).

  Subsequently, the produced leather is finished (S205). In the finishing process, the leather is painted and embossed or embossed as necessary.

  Subsequently, a natural mark of the finished leather is searched, and the leather is cut into a predetermined shape while avoiding the searched natural mark (S207) to obtain a leather product (finished product) (S209).

  For example, Patent Document 1 can be listed as a patent document related to the prior art.

JP 9-512215 gazette

  By the way, in the conventional method for producing a leather product, the natural mark appears on the surface of the leather until the step S203, so that it can be seen with the naked eye. However, if finishing is performed on the surface of the leather in step S205, the natural mark is hidden by a coating film or the like.

  In addition, if a natural mark exists in a leather product (cut parts) cut by cutting, the leather product becomes defective even if the natural mark is hidden by finishing. In order to avoid this, in the cutting process, cutting that avoids the natural mark (leather product removal in which the natural mark does not exist in the leather product) is performed.

  However, since the natural mark is hidden by the finish painting, the natural mark is avoided in the cutting process by stretching the leather to make the natural mark visible or by touching it. Therefore, the natural mark is likely to be overlooked, and there is a problem that the leather product which is a defective product flows out due to the presence of the natural mark in the cut leather product.

  The above problem becomes more prominent when the coating film provided by finishing is thickened or embossed or embossed.

  The present invention has been made in view of the above problems, and a leather product generation method capable of preventing a leather product that has been cut out from being caused by a natural mark and preventing a leather product that is a defective product from flowing out. And it aims at providing the leather product production | generation apparatus.

  The invention according to claim 1 is a leather photographing process for photographing a leather having a ground mark and a natural mark appearing, a leather finishing process for finishing the leather, and a video photographed in the leather photographing process. And a leather cutting process for cutting the leather that has been finished in the leather finishing process so as to avoid natural marks formed on the leather.

  According to a second aspect of the present invention, in the leather product generation method according to the first aspect, in the leather cutting step, the image photographed in the leather photographing step is applied to the leather finished in the leather finishing step. This is a method for producing a leather product, which is a process of projecting and cutting the leather.

  Invention of Claim 3 has the natural mark ranking process which ranks the natural mark of the image | video image | photographed at the said leather photography process in the leather product production | generation method of Claim 1 or Claim 2, The leather cutting step is a leather product generation method that is a step of cutting the leather that has been finished in the leather finishing process according to the ranking performed in the natural mark ranking process.

  The invention according to claim 4 is a first leather installation part for installing a leather that has undergone foundation processing and a natural mark appears, and a leather photographing part for photographing the leather installed in the first leather installation part; The second leather installation part for installing the finished leather, the leather cutting part for cutting the leather installed in the second leather installation part, and the image taken by the leather photographing part, A leather having a control unit that controls the leather cutting part so that the leather cutting part cuts the leather installed in the second leather installation part while avoiding a natural mark formed on the leather Product generation device.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the defect by a natural mark generate | occur | produces in the cut leather product, and it can prevent that the leather product which is a defective product flows out.

It is a flowchart which shows the schematic process of the leather product production | generation method which concerns on embodiment of this invention. It is a figure which shows the process of the leather product production | generation method which concerns on embodiment of this invention. It is a figure which shows schematic structure of the leather product production | generation apparatus which concerns on embodiment of this invention. It is a block diagram which shows schematic structure, such as a control apparatus of the leather product production | generation apparatus which concerns on embodiment of this invention. It is a figure which shows a part of memory content of the memory of the control apparatus of the leather product production | generation apparatus which concerns on embodiment of this invention. It is a flowchart which shows the general | schematic process of the conventional leather product production | generation method.

  In the leather product generation method according to the embodiment of the present invention, a leather product is generated (manufactured) through a leather photographing process (leather photographed image storage process), a leather finishing process, and a leather cutting process ( (See FIG. 1).

  In the leather photographing process, the leather 10 on which a base mark is processed and a natural mark (NM) 12 appears, for example, is photographed with a camera 14, and the photographed image (image) is stored in a memory 16 (magnetic memory or IC memory). Or a storage medium such as a tape) (see step S5 in FIG. 1 and FIG. 2). In addition, the reference symbol 12 shown in FIG. 2A indicates a natural mark where the leather 10 actually exists.

  Substrate processing (step S3 in FIG. 1) is generally performed in the following steps.

  The wet blue (WB) or wet white (WW) skin (for example, one skin for one cow; step S1 in FIG. 1) is returned with water, and the returned skin is returned according to the degree of the wound. Sort by grade.

  The grade-selected skin is halved at the back and the thickness is adjusted by shaving or the like (for example, a thickness of about 5 mm is set to a thickness of about 1.0 mm to 1.5 mm).

  The skin with the proper thickness is licked in the drum. At this time, chemicals, oil, dyes and the like are put in the drum together with the leather. Tanning changes the quality of the skin (for example, it becomes softer, less susceptible to spoilage, and the skin is colored by dyes). The process so far is called a water field process, and the following process is called a dry field process.

  Next, it is dried while loosening the tanned skin. Thereby, the leather 10 is produced | generated. After that, the leather 10 may be tanned again to further soften the leather 10.

  This completes the underground processing.

  The natural mark 12 on the leather 10 that has been subjected to the lower processing appears on the surface of the leather 10 and can be easily seen with the naked eye (see FIG. 2A). The natural mark 12 is a portion that remains on the leather 10 and obstructs the smoothness of the surface of the leather 10 due to being a native cow (may be another animal). The natural mark 12 is formed by scratches, scratches, healing wounds, rough skin, insect bites (grabs), thumbprints, leaf beetles, tiger wrinkles, blood vessel traces, and the like.

  The part of the leather 10 with the natural mark 12 is concave or convex compared to other parts (the part of the leather 10 without the natural mark 12), and looks more whitish than the other parts, or Looks dark.

  In the leather photographing process, a QR code (registered trademark) or a bar code or the like is formed on the end of the back surface (for example, the floor surface of the leather 10; the surface opposite to the surface to be photographed) of the leather 10 that has undergone the base processing. Put an identification code. Specifically, a seal provided with an identification code by printing or the like is pasted on the back end of the leather 10.

  Subsequently, for example, the leather 10 with the identification code is placed on the upper surface of the leather placing table having the upper surface (horizontal plane) on which the leather 10 is placed. At this time, the back surface of the leather 10 to which the identification code is attached becomes the lower surface and comes into surface contact with the upper surface of the leather mounting table, and the front (front) surface of the leather 10 to which the identification code is not attached (for example, the leather 10 (Silver surface; surface to be photographed) is facing up.

  The front surface of the leather 10 placed on the leather placing table is photographed with a camera 14 (may be photographed with another device such as a scanner) provided above the leather placing table. The recorded video (image) is stored in the memory 16 in association with the identification number read by the identification code reading unit (not shown in FIG. 2).

  The leather finishing process is a process of finishing the leather 10 after taking a picture in the leather photographing process (see step S7 in FIG. 1, FIG. 2B).

  Finishing is generally performed in the following steps.

  The leather 10 placed on the leather mounting table and photographed by the camera 14 is removed from the leather mounting table, a base coat is applied to the front surface of the leather 10, an intermediate coating is applied thereon, and further on this Apply a top coat. Most of the natural marks are hidden by the coating formed by these coatings.

  Note that the leather 10 may be embossed or textured, which makes the natural mark more difficult to see.

  The leather cutting process is a process of cutting the leather 10 that has been finished in the leather finishing process by using the images taken and stored in the leather shooting process and avoiding the natural mark 12 formed on the leather 10. (Steps S9 and S11 in FIG. 1).

  It is not necessary to avoid all the natural marks 12 formed on the leather 10 in the leather cutting process. In other words, the cut leather product may be present as long as it has a natural mark. Naturally, a natural mark of a bad degree is not allowed to exist in cut leather products. As natural marks having a bad degree, for example, holes that are formed in the leather 10, deep recesses formed in the leather 10, and the like that can be distinguished from defects at a glance can be listed. As a natural mark having a good degree, for example, a very shallow concave portion formed in the leather 10 or the like that cannot be determined as a defect at first glance can be listed.

  The cutting in the leather cutting process is performed by, for example, a person cutting the leather 10 into a predetermined shape using a knife such as a knife, or punching the leather 10 with a mold. Leather cut into a predetermined shape becomes a leather product. Leather products are used, for example, for interior parts such as automobile seats.

  Further, in the leather cutting process, for example, an image shot in the leather shooting process is projected onto the leather 10 finished in the leather finishing process (the size and position of the leather 10 and the size of the projected image). The image is projected onto the leather so that the positions coincide with each other; see FIG. 2 (c)), and the leather 10 is cut.

  Specifically, on the upper surface of a leather mounting table (which may be the same as or different from that used for photographing) having an upper surface (horizontal surface) on which the leather 10 is mounted, An image output unit (image output device) such as the projector 20 is used to project an image captured by the camera 14 and stored in the memory 16. When a large number of images are stored in the memory 16, the identification code attached to the leather 10 placed on the leather mounting table is read and read by the identification code reading unit, and the corresponding identification code is read. Project an image.

  In the above projection, a person places the leather 10 on the upper surface of the mounting table. At this time, the back surface of the leather 10 is brought into surface contact with the upper surface of the mounting table so that the image 18 has the same size as the leather 10 and overlaps the image 18 on which the leather 10 is projected. Note that reference numeral 12 in FIG. 2C indicates a natural mark appearing in the video 18, and an actual natural mark exists at the same position as the natural mark indicated by the reference numeral 12.

  In the leather photographing process, one piece of leather 10 may be photographed a plurality of times. These shootings are performed by changing the shooting direction with the camera 14 or changing the direction of light applied to the leather 10 when shooting with the camera 14.

  When one piece of leather 10 is photographed a plurality of times, it is assumed that in the leather cutting process, the images are superimposed and projected onto the leather 10 at the same time, or the images are alternately projected onto the leather 10 at different times.

  Further, in the leather cutting process, the image captured in the leather photographing process is projected and displayed on white paper or the like separate from the leather 10 without being projected on the leather 10, or separately from the leather 10. It may be printed on white paper or the like, or displayed on a display such as an LCD. Based on this display, the leather 10 may be cut away from the natural mark 12. In the above display, the scale of the video shot in the leather shooting process may be changed (for example, reduced) for display.

  In addition, the natural marks of the images taken in the leather shooting process are ranked (natural mark ranking process), and in the leather cutting process, according to the ranking made in the natural mark ranking process, in the leather finishing process The leather 10 that has been finished may be cut.

  The ranking in the natural mark ranking step is performed as follows, for example.

  The photographed image of the leather 10 (image in which the natural mark 12 appears) is displayed on an image display device such as an LCD with a touch panel. A mark (rank display mark) for displaying a rank is assigned to the vicinity of each natural mark 12 in the displayed video by using an input unit such as a touch panel or a keyboard. In addition, it is desirable that the rank display mark is given while actually viewing the leather 10 as well as the displayed image.

  For example, a rank display mark “2” is given near the first natural mark 12, and a rank display mark “3” is given near the second natural mark 12. Rank display mark “1” is provided near the natural mark 12 and rank display mark “2” is provided near the fourth natural mark 12. Give a mark.

  The indications “1”, “2”, and “3” represent the quality of the natural mark 12, and the degree becomes worse as the number increases.

  For example, the natural mark 12 given “3” should not be present in any leather product. When the natural mark 12 to which “2” is given is used for a part in which the leather product is not conspicuous, the natural mark 12 is allowed to exist in the leather product. The natural mark 12 to which “1” is assigned is allowed to exist if it is a predetermined part (for example, an inconspicuous part) of a leather product.

One of the three rank display marks may be omitted. For example, when the number of occurrences of “1” is the largest, the display of “1” may be omitted. )
In place of or in addition to ranking the natural mark 12 of the video shot in the leather shooting process, the natural mark 12 of the video shot in the leather shooting process may be modified.

  It is desirable that the correction be made while actually viewing the leather 10 as well as the displayed image. As a mode of correction, for example, correction of the shape of the photographed natural mark 12, deletion from the image of the pattern that is not the photographed natural mark 12, and addition of the natural mark 12 to the image of the photographed leather 10 are listed. Can do.

  In the photographed image, the natural mark 12 is represented by a change in the color of the part of the leather 10. However, the natural mark 12 is not actually formed or the color is changed although the color is changed. In some rare cases, the natural mark 12 is actually formed. Even in such a case, it is possible to prevent generation of a leather product in which the natural mark 12 is present in the cutting process by correcting the natural mark 12 of the video photographed in the leather photographing process.

  The given rank display mark or the like is stored in the memory 16 together with the image of the leather 10 in which the natural mark 12 appears, and is projected onto the leather 10 in the leather cutting process, for example.

  Here, the apparatus (leather product production | generation apparatus) 30 for enforcing the leather product production | generation method mentioned above is illustrated.

  For convenience of explanation, one horizontal direction is the X-axis direction, another horizontal direction that is orthogonal to the X-axis direction is the Y-axis direction, and is orthogonal to the X-axis direction and the Y-axis direction. The vertical direction is the Z-axis direction.

  As shown in FIG. 3, the leather product generating device 30 is the same as the first leather installation section 32, the leather photographing section (for example, camera) 14, and the second leather installation section 34 (first leather installation section). And a control unit 38.

  In addition, the leather product generation device 30 is provided with a control device 60 as shown in FIGS. 3 and 4. The control device 60 is provided with a control unit 38 and a memory 16.

  The 1st leather installation part 32 installs the leather 10 by which the base processing was made and the natural mark 12 has appeared, and is corresponded to the leather mounting base mentioned above. Moreover, the 1st leather installation part 32 hold | maintains the leather 10 by vacuum adsorption, for example.

  The camera 14 photographs the leather 10 installed in the first leather installation unit 32. The first leather installation portion 32 is integrally provided with a support column 40 and a beam 42, and the beam 42 is positioned above the first leather installation portion 32. The camera 14 is provided integrally with the beam 42, and the leather 10 placed on the first leather installation portion 32 is photographed by the camera 14.

  The leather cutting part 36 cuts the leather 10 installed in the second leather installation part 34. The leather cutting part 36 includes a Y-axis moving body 44, an X-axis moving body 46, a Z-axis moving body 48, and a blade holder (blade installation body) 50.

  The Y-axis moving body 44 is provided above the second leather installation section 34 and away from the second leather installation section 34, and is supported by the second leather installation section 34 by a linear guide bearing (not shown). The actuator can be moved and positioned with respect to the second leather installation portion 34 in the Y-axis direction by an actuator such as a servo motor.

  The X-axis moving body 46 is supported on the Y-axis moving body 44 by a linear guide bearing (not shown), and can be moved and positioned with respect to the Y-axis moving body 44 in the X-axis direction by an actuator such as a servo motor.

  The Z-axis moving body 48 is supported on the X-axis moving body 46 by a linear guide bearing (not shown), and can be moved and positioned with respect to the X-axis moving body 46 in the Z-axis direction by an actuator such as a servo motor.

  The blade holder 50 is supported on the Z-axis moving body 48 by a bearing (not shown), and can be rotated and positioned with respect to the Z-axis moving body 48 about the θ axis by an actuator such as a servo motor. The θ axis is an axis extending in the Z axis direction through the center of the blade holder 50.

  The control unit 38 uses the video imaged by the camera 14 and stored in the memory 16 so as to avoid the natural mark 12 formed on the leather 10 and is installed on the leather cutting unit 36 (installed on the blade holder 50). The leather cutting unit (cutter driving unit; each servo motor described above) 36 is controlled so that the cutting tool 52) cuts the leather 10 installed in the second leather installation unit 34.

  The operation of allocating the leather product from the leather 10 so as to avoid the natural mark 12 is performed in the same manner as the nesting of the plate material.

  Further, if the image captured by the camera 14 is processed by the image processing unit 62 shown in FIG. 4 so that the natural mark 12 is automatically recognized, the image captured by the camera 14 is not projected onto the leather 10. The leather cutting unit 36 can cut the leather 10.

  Further, the leather product generating apparatus 30 is provided with an identification code reading unit 64 and an input unit 66. As described above, the identification code reading unit 64 reads the identification code attached to the leather 10 photographed in FIG. 2A, or the leather placed on the second leather placement unit 34. The identification code attached to 10 is read and read. The input unit 66 is composed of, for example, a mouse, a keyboard, and a touch panel. When the rank display mark described above is given, or when the natural mark 12 is corrected, when the leather product to be cut from the leather 10 is specified. It is what is used.

  As shown in FIG. 6, the memory 16 stores the identification code and the image data in association with each other. The memory 16 stores the specifications (shape) of leather products.

  In the above description, the leather product generation device 30 is a single device, but the leather product generation device 30 may be divided into two. In this case, the first leather product generating device is in charge of photographing the leather 10, and the second leather product generating device is in charge of cutting the leather.

  In this case, the first leather product generating apparatus includes the first leather installing unit 32 and the camera 14 shown in FIG. 3, the control unit 38, the image processing unit 62, the memory 16, and the identification code reading shown in FIG. A unit 64 and an input unit 66 are provided.

  The second leather product generating apparatus includes a second leather installation unit 34 shown in FIG. 3, a control unit 38, a memory 16, an identification code reading unit 64, and a cutter driving unit (leather cutting unit) shown in FIG. 36.

  Further, the leather 10 may be cut manually by a second leather product generation device. In this case, the image processing unit 62 in the first leather product generation device is not required, and the cutter driving unit 36 in the second leather product generation device is not required. Instead, a video output unit 20 such as a projector is provided in the second leather product generation apparatus.

  According to the leather product generation method, the leather 10 that has been finished and processed is cut by using the images taken and stored in the leather shooting process, avoiding the natural mark 12 formed on the leather 10, so that the natural appearance is just natural. Cutting that avoids the mark 12 can be simplified, and defective leather products including the natural mark 12 can be prevented from flowing out.

  Further, in the conventional cutting, the natural mark 12 is hidden by finishing, so the natural mark 12 is discovered by pulling the leather 10 or shining light from different angles, and the natural mark 12 is marked. The leather 10 is cut.

  On the other hand, according to the leather product generation method according to the present embodiment, the above-described work for finding the natural mark 12 and the work for marking the found natural mark 12 become unnecessary, and the production process of the leather product is simplified. Can be

  Further, according to the leather product generation method, the image captured in the leather photographing process is projected onto the finished leather 10 and the leather 10 is cut, so that the leather 10 can be quickly and easily avoided without making a mistake. Can be cut.

  In addition, according to the leather product generation method, the leather 10 that has been finished according to the ranking is cut, so that the generation of waste in the leather 10 can be reduced when the leather product is obtained.

10 Leather 12 Natural Mark 14 Leather Shooting Department (Camera)
30 Leather product generating device 32 First leather installation part (leather mounting table)
34 Second leather installation section (leather mounting table)
36 Leather cutting part 38 Control part

Claims (4)

Leather shooting process to shoot the leather where the base mark is processed and the natural mark appears,
A leather finishing process for finishing the leather;
Using the video taken in the leather photography process, avoiding the natural mark formed in the leather, leather cutting process for cutting the leather finished in the leather finishing process,
A method for producing a leather product, comprising: In the leather product production | generation method of Claim 1,
The leather cutting step is a step of cutting the leather by projecting the image taken in the leather photographing step onto the leather finished in the leather finishing step. In the leather product production | generation method of Claim 1 or Claim 2,
Having a natural mark ranking process that ranks the natural mark of the video taken in the leather photography process,
The leather cutting step is a step of cutting the leather that has been finished in the leather finishing process according to the ranking performed in the natural mark ranking process. A first leather installation section for installing leather on which a ground mark has been made and a natural mark appears;
A leather photographing section for photographing the leather installed in the first leather installing section;
A second leather installation section for installing the finished leather;
A leather cutting section for cutting the leather installed in the second leather installation section;
The leather is used so that the leather cutting part cuts the leather installed in the second leather installation part by using the image photographed by the leather photographing part and avoiding the natural mark formed on the leather. A control unit for controlling the cutting unit;
A leather product generating apparatus characterized by comprising:

Images