CN109998226B - Design method of fat-thin last - Google Patents
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- CN109998226B CN109998226B CN201910223085.2A CN201910223085A CN109998226B CN 109998226 B CN109998226 B CN 109998226B CN 201910223085 A CN201910223085 A CN 201910223085A CN 109998226 B CN109998226 B CN 109998226B
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
- A43D3/00—Lasts
- A43D3/14—Stretching or spreading lasts; Boot-trees; Fillers; Devices for maintaining the shape of the shoe
- A43D3/1433—Shoe-trees
- A43D3/1441—Shoe-trees spreading the width of a shoe, i.e. laterally expandable
- A43D3/145—Shoe-trees spreading the width of a shoe, i.e. laterally expandable adjustable
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Abstract
The invention discloses a design method of a fat and thin last, which comprises the following steps of preparing data to be graded; step two, segmenting the standard three-dimensional shoe tree model according to the standard size parameters and the corresponding foot length parameters; step three, performing slimming grading on the segmented standard three-dimensional shoe tree model; step four, storing the data and manufacturing a fat-thin last. The invention has the following beneficial effects: on the premise of not changing the shape and style of the shoe style, the shoe tree manufactured by the design method of the invention can manufacture shoes which are rich and thin and suitable for the foot shapes of different people and are comfortable to wear.
Description
Technical Field
The invention relates to the technical field of shoemaking, in particular to a design method of a fat-thin last.
Background
The shoe size is a standard unit system used for measuring the shape of human feet so as to match with shoes, and the shoe products produced by the current technology are standard shoes made of the shoe size. However, in the actual selling process, the fit rate of the feet of the consumers and the standard shoes is only 30 percent; still 30% of the fat foot population, 30% of the thin foot population, and 10% of the population with abnormal feet (including large and small feet, tall and low feet, severe hallux valgus, flat feet, and high arch feet) do not fit standard shoes. Therefore, at present, a shoe factory meets the requirement of the crowd with fat and thin feet by manufacturing fat and thin lasts.
The shoe tree is a model for making shoes, and the structure and the shape of the shoe tree determine the shape and the wearing comfort of the shoes. The method for manufacturing the fat and thin last in the shoe factory at present comprises the following steps:
1. on the basis of the standard code, the length is unchanged, and the toe circumference is increased by one code or two codes to become a fat shoe last;
2. on the basis of the standard code, the length is unchanged, and the toe circumference is reduced by one code or two codes so as to become a thin last.
The method is used for manufacturing the shoe tree suitable for the foot slimming in a mode of integral enlargement and reduction, and the manufactured shoe tree type fertilizer is integrally fat and thin. Because the toe circumference and the waist circumference both represent the circumferences of corresponding parts, the shape of the shoe last after being integrally adjusted by adding and subtracting is greatly different from a standard original shoe last (namely a standard shoe), thereby changing the basic shape and style of the shoe money, seriously influencing the external aesthetic degree of the shoe, and making the fat and thin shoe manufactured by the shoe last be not favorable for sale.
In summary, there is a need to develop a shoe with a comfortable wearing style that can satisfy the wearing degree of the foot shape by only partially adjusting the last body without affecting the basic shape and style of the shoe style, without increasing the production cost of the shoe making, so that consumers can purchase the shoes with a reasonable price.
Disclosure of Invention
The invention aims to provide a design method of a fat-thin last, aiming at manufacturing shoes which have a plurality of fat-thin types and are suitable for foot shapes of different people and comfortable to wear by using a last manufactured by the design method on the premise of not changing the shape and style of the shoe style.
The technical purpose of the invention is realized by the following technical scheme: a design method of a fat and thin last comprises the following steps:
step one, preparing data to be graded: preparing a standard three-dimensional shoe tree model and basic parameters, wherein the basic parameters are the standard shoe tree characteristic part size and the main characteristic part size of the shoe tree according to the national standard, and mainly comprise standard size parameters and foot length parameters corresponding to corresponding sizes;
step two, segmenting the standard three-dimensional shoe tree model according to the standard size parameters and the corresponding foot length parameters: segmenting a bottom plate of a standard last body according to percentages by referring to the foot length of a corresponding size, wherein the heel part of the segmentation is used as a starting point and marked as O, the toe part of the segmentation is used as an end point and marked as F, A, B, C, D, E points are sequentially divided on the bottom plate 0-F of the last at different distances, and the point A is closest to the point O;
step three, performing slimming grading on the segmented standard three-dimensional shoe tree model: the step of putting the last degree can be divided into a step of putting the last bottom width, a step of putting the last back height and a step of putting the last bottom plate thickness, and the step of putting the last bottom width, the last back height and the last bottom plate thickness of the last model are respectively put by dividing the standard three-dimensional last model into a plurality of sections;
step four, storing data and manufacturing a fat-thin last: and storing the graded three-dimensional shoe tree model structure with the fat and thin type and the graded data parameters into a shoe tree model database, and producing and manufacturing fat and thin shoe lasts.
The invention is further configured to: the method for segmenting the bottom plate of the last in the second step specifically comprises the following steps:
1. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 40 percent, and the foot length is the O-A section;
2. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 60 percent to obtain an O-B section;
3. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 72 percent, and the foot length is the O-C section;
4. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 80 percent to form an O-D section;
5. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 90 percent, namely the O-E section.
The invention is further configured to: the last bottom width fat and thin grading in the third step is specifically as follows: the inner side of the bottom of the shoe tree and the outer side of the bottom of the shoe tree are respectively enlarged or reduced according to sections, wherein the fat shoe tree is adjusted according to the section enlargement, the thin shoe tree is adjusted according to the section reduction, and the standard shoe trees with different shoe sizes are enlarged or reduced by the same value according to the sections.
The invention is further configured to: the step three is that the last back height fat thin grading specifically comprises the following steps: and (3) heightening or lowering the back of the segmented standard three-dimensional shoe tree model in a segmented manner, increasing the height of the back of the shoe tree to be a fat shoe tree, lowering the height of the back of the shoe tree to be a thin shoe tree, and heightening or lowering the back of the shoe tree by the same value according to the segments for the standard shoe trees with different shoe sizes.
The invention is further configured to: the last bottom plate thickness and thinness grading in the third step is as follows: and carrying out sectional thickening or thinning on the shoe last bottom plate of the segmented standard three-dimensional shoe last model, wherein a fat shoe last is used for increasing the thickness of the shoe last bottom plate, a thin shoe last is used for thinning the shoe last bottom plate, and standard shoe lasts of different shoe sizes are used for heightening or reducing the shoe last bottom plate by the same thickness according to sections.
The invention is further configured to: the fat shoe last needs to look beautiful and elegant, and can be stretched for 2mm in the C-direction F position; the thin last needs to look elegant, and can be retracted by 2mm from the C direction to the F direction.
The invention is further configured to: the fat-thin shoe last can be matched with shoe pads with different thicknesses.
The invention is further configured to: the insole can be divided into A, B and C, wherein the half sole of the A is 1.5mm thick, and the heel is 3.5mm thick; the half sole of the B style is 2.5mm in thickness and the heel of the B style is 5.5mm in thickness, and the half sole of the C style is 3.5mm in thickness and the heel of the C style is 7.5mm in thickness.
The invention is further configured to: and after the third step is finished, performing last back heightening operation according to the three-dimensional last model which is finished with the segmented fat and thin grading.
In conclusion, the invention has the following beneficial effects: according to the invention, the fat-thin shoe last meeting 30% of foot fat people and 30% of foot thin people can be obtained by locally adjusting the standard shoe last shape; the designed fat-thin shoe last can not increase the production cost of shoe making, the same process and the same flow as common shoes are adopted, the same grid plate is used for making the same upper surface, and the requirements of people with different fat-thin foot types can be met only by using shoe lasts with different fat-thin degrees and insoles with different thicknesses. In particular, the designed fat-thin last has the same basic shape and design style as a standard last.
Drawings
FIG. 1 is a fragmentary, schematic view of a last plate according to an embodiment of the present invention;
FIG. 2 is a schematic view illustrating an adjustment of the back height of a last according to an embodiment of the present invention;
fig. 3 is a sectional view of an insole in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
A design method of a fat and thin last comprises the following steps:
step one, preparing data to be graded: preparing a standard three-dimensional shoe tree model and basic parameters, wherein the basic parameters are the standard shoe tree characteristic part size and the main characteristic part size of the shoe tree according to the national standard, and mainly comprise standard size parameters and foot length parameters corresponding to corresponding sizes;
step two, segmenting the standard three-dimensional shoe tree model according to the standard size parameters and the corresponding foot length parameters: segmenting a bottom plate of a standard last body according to percentages by referring to the foot length of a corresponding size, wherein the segment takes a heel position as a starting point and is marked as O, and takes a toe position as an end point and is marked as F, so that A, B, C, D, E points are sequentially divided on the bottom plate 0-F at different distances, and the point A is closest to the point O;
step three, performing slimming grading on the segmented standard three-dimensional shoe tree model: the fat level grading can be divided into a last bottom width fat-thin grading, a last back height fat-thin grading and a last bottom plate thickness fat-thin grading, and the standard three-dimensional last model divided into a plurality of sections is divided, and each section respectively grades the last bottom width, the last back height and the last bottom plate thickness of the last model;
step four, storing data and manufacturing a fat-thin last: and storing the graded three-dimensional shoe tree model structure with the fat and thin type and the graded data parameters into a shoe tree model database, and producing and manufacturing fat and thin shoe lasts.
Further, the method for segmenting the bottom plate of the last in the second step specifically comprises the following steps:
1. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 40 percent, and the foot length is the O-A section;
2. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 60 percent to obtain an O-B section;
3. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 72 percent, and the foot length is the O-C section;
4. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 80 percent to form an O-D section;
5. the foot length corresponding to the standard shoe last of the corresponding shoe size is multiplied by 90 percent, namely the O-E section.
The selected standard is that the O-A section is the heel part of the human body, and the A point of the O-A section represents the instep circumference measurement starting point; the point B can represent the maximum height of the instep of the human body, and can measure the circumference and the height of the instep of the human body; point C represents the base width of the foot from the first metatarsal to the fifth metatarsal; the point D represents the part of the human foot when the foot is bent during walking and can measure the winding circumference of the foot when the foot is bent during walking; point E is the position indicating the vertical width of the first metatarsal toe and the section E-F is the toe portion of the human body. The above description is made with reference to the method of measuring the size of GBT-3294-1998 shoe tree.
Further, the foot length corresponding to the standard last of the corresponding shoe size may be the foot length corresponding to the standard last of 40 sizes, and the foot length is 250mm, so the specific segments are as follows:
1.250mm multiplied by 40% =100mm, namely O-A section;
2.250mm multiplied by 60% =150mm, namely O-B section;
3.250mm multiplied by 72% =180mm, namely the O-C section;
4.250mm multiplied by 80% =200mm, namely the O-D section;
5.250mm × 90% =225mm, namely O-E section.
Further, the last bottom width fat and thin grading in the third step is as follows: the inner side of the bottom of the shoe tree and the outer side of the bottom of the shoe tree are respectively enlarged or reduced according to sections, wherein the fat shoe tree is adjusted according to the section enlargement, the thin shoe tree is adjusted according to the section reduction, and the standard shoe trees with different shoe sizes are enlarged or reduced by the same value according to the sections.
Further, the inner width of the bottom of the last in the third step is respectively adjusted according to the fat last and the thin last, and the inner width of the bottom of the last is adjusted according to the O-A section +/-1 mm, the A-C section +/-1.5 mm, the C-D section +/-1.3 mm, the D-E section +/-1 mm and the E-F section +/-0.5 mm; meanwhile, the width of the outer side of the bottom of the last is respectively adjusted according to the fat last and the thin last, and the width of the outer side of the bottom of the last is adjusted according to the O-A section +/-1 mm, the A-C section +/-1.5 mm, the C-D section +/-1.3 mm, the D-E section +/-1 mm and the E-F section +/-0.5 mm. The inner side of the last bottom and the outer side of the last bottom are simultaneously enlarged or reduced so as to adjust the width of the last bottom, so that the manufactured fat-thin last can better represent the width sizes of various fat-thin feet.
Further, the last back height slimming step in the third step is as follows: and (3) heightening or lowering the back of the segmented standard three-dimensional shoe tree model in a segmented manner, increasing the height of the back of the shoe tree to be a fat shoe tree, lowering the height of the back of the shoe tree to be a thin shoe tree, and heightening or lowering the back of the shoe tree by the same value according to the segments for the standard shoe trees with different shoe sizes.
Further, the back height of the last in the third step is respectively adjusted according to the fat last and the thin last, wherein each section is adjusted according to the back locking part (b-last top line) +/-6 mm, the sole part (e-b) +/-2 mm and the head part (e-f) +/-0.5 mm, and then the line last back line is pulled down. It should be noted that at least three sections of the height of the back of the last to be adjusted are preferred in this embodiment. The height of the back of the last is graded, so that the back of the last of the manufactured fat-thin last has the same basic shape and style as a standard last, and the standard last is reformed into the fat-thin last on the basis of keeping the appearance shape so as to be suitable for the crowd with fat-thin feet.
Further, the thickness and thinness of the bottom plate of the shoe last in the third step are specifically set as follows: and carrying out sectional thickening or thinning on the shoe last bottom plate of the segmented standard three-dimensional shoe last model, wherein a fat shoe last is used for increasing the thickness of the shoe last bottom plate, a thin shoe last is used for thinning the shoe last bottom plate, and standard shoe lasts of different shoe sizes are used for heightening or reducing the shoe last bottom plate by the same thickness according to sections.
Further, the thickness of the bottom plate of the last in the third step is respectively adjusted according to the fat last and the thin last, wherein the thickness is +/-1.5 mm from the (o-e) section of the last and +/-1 mm from (e-f) to the head. It should be noted that the number of the steps for increasing or decreasing the height of the last bottom plate in sections is at least two, and two sections are preferred in this embodiment. Through adjusting last base plate thickness to increase or reduce shoes inner chamber space, thereby the fat thin foot that better adapts to different crowds, in order to give the better comfort level of fat thin foot.
Furthermore, on the basis of the above-mentioned adjustment of the fat and thin last, if the fat last is required to be beautiful, the last can be stretched by 2mm in the position from C to F; if the thin last is required to be beautiful, the thin last can be retracted by 2mm from the position of C to F. On the basis, a plurality of shoe last types with different fatness degrees can be obtained.
Furthermore, the fat-thin last can be matched with insoles with different thicknesses to meet the use requirements of different people. Here, insoles of different thicknesses are used with the effect of finally fine-tuning the degree of fatness. In this embodiment, the insole can be divided into A, B and C. Specifically, the half sole of the A style is 1.5mm in thickness, and the heel of the A style is 3.5mm in thickness; the half sole of the B style is 2.5mm thick, the heel of the B style is 5.5mm thick, and the half sole of the C style is 3.5mm thick, and the heel of the C style is 7.5mm thick. The special description is as follows: the type B is a common insole in the market, and the type A and the type C are both better to enable consumers to wear the slimming shoes comfortably, and the effect is better when the slimming shoes are matched with the type A and the type C.
Due to the problem of wearing habits of consumers, if the consumers like to loose the feet a little, the thin money-A money can be selected; if the feet are like to be tightly wrapped a bit, the thick money-C money can be selected; if the feeling is just right, the original shoe pad-B style can be adopted. The inner cavity of the shoe is finely adjusted through the insole.
Furthermore, the shoe is suitable for people with extremely high instep and high arch. After the third step is finished, the back of the last can be heightened according to the three-dimensional shoe tree model which is finished with the sectional slimming and grading, and the wearing requirements of corresponding people are met by enlarging the space of the instep.
TABLE 1 basic data of adjusted shoe tree
As can be seen from table 1, B1 and B2 are standard, S1 and S2 are thin, and F1 and F2 are fat. Wherein, the numbers B2, S2 and F2 are all the high lines of the back of the last, and the girth of the last can be increased by increasing the back height, so as to meet the requirements of people with extra high instep and high arch foot.
Claims (9)
1. A design method of a fat and thin last is characterized in that: the method comprises the following steps:
step one, preparing data to be graded: preparing a standard three-dimensional shoe tree model and basic parameters, wherein the basic parameters are the standard shoe tree characteristic part size and the main characteristic part size of the shoe tree according to the national standard, and mainly comprise standard size parameters and foot length parameters corresponding to corresponding sizes;
step two, segmenting the standard three-dimensional shoe tree model according to the standard size parameters and the corresponding foot length parameters: segmenting a bottom plate of a standard last body according to percentages by referring to the foot length of a corresponding size, wherein the heel part of the segmentation is used as a starting point and marked as O, the toe part of the segmentation is used as an end point and marked as F, A, B, C, D, E points are sequentially divided on the bottom plate 0-F of the last at different distances, and the point A is closest to the point O;
step three, performing slimming grading on the segmented standard three-dimensional shoe tree model: the fat level grading can be divided into a last bottom width fat-lean grading, a last back height fat-lean grading and a last bottom plate thickness fat-lean grading, and the standard three-dimensional last model divided into a plurality of sections is divided, and each section respectively grades the last bottom width, the last back height and the last bottom plate thickness of the last model;
step four, storing data and manufacturing a fat-thin last: and storing the graded three-dimensional shoe tree model structure with the fat and thin type and the graded data parameters into a shoe tree model database, and producing and manufacturing fat and thin shoe lasts.
2. The method for designing a fat-thin last according to claim 1, wherein: the method for segmenting the bottom plate of the last in the second step specifically comprises the following steps:
(1) the foot length corresponding to the standard last of the corresponding shoe size is multiplied by 40 percent, and the foot length is the O-A section;
(2) the foot length corresponding to the standard last of the corresponding shoe size is multiplied by 60 percent, and the foot length is the O-B section;
(3) the foot length corresponding to the standard last of the corresponding shoe size is multiplied by 72 percent, and the foot length is the O-C section;
(4) the foot length corresponding to the standard last of the corresponding shoe size is multiplied by 80 percent, namely the O-D section;
(5) the foot length corresponding to the standard last of the corresponding shoe size is multiplied by 90 percent, and the foot length is the O-E section.
3. The method for designing a fat-thin last according to claim 1, wherein: the last bottom width fat and thin grading in the third step is specifically as follows: the inner side of the bottom of the shoe tree and the outer side of the bottom of the shoe tree are respectively enlarged or reduced according to sections, wherein the fat shoe tree is adjusted according to the section enlargement, the thin shoe tree is adjusted according to the section reduction, and the standard shoe trees with different shoe sizes are enlarged or reduced by the same value according to the sections.
4. The method for designing a fat-thin last according to claim 1, wherein: the step three is that the last back height fat thin grading specifically comprises the following steps: and (3) heightening or lowering the back of the segmented standard three-dimensional shoe tree model in a segmented manner, increasing the height of the back of the shoe tree to be a fat shoe tree, lowering the height of the back of the shoe tree to be a thin shoe tree, and heightening or lowering the back of the shoe tree by the same value according to the segments for the standard shoe trees with different shoe sizes.
5. The method for designing a fat-thin last according to claim 1, wherein: the third step is that the thickness and the weight of the bottom plate of the shoe last are graded as follows: and carrying out sectional thickening or thinning on the shoe last bottom plate of the segmented standard three-dimensional shoe last model, wherein a fat shoe last is used for increasing the thickness of the shoe last bottom plate, a thin shoe last is used for thinning the shoe last bottom plate, and standard shoe lasts of different shoe sizes are used for heightening or reducing the shoe last bottom plate by the same thickness according to sections.
6. The method for designing a fat-thin last according to claim 2, wherein: the fat shoe last needs to look beautiful, and is stretched for 2mm in the C-direction F position; the thin last needs to look elegant, and is retracted 2mm from the C-direction to the F-direction.
7. The method for designing a fat-thin last according to claim 1, wherein: the fat-thin shoe last can be matched with shoe pads with different thicknesses.
8. The method for designing a fat-thin last according to claim 7, wherein: the insole can be divided into A, B and C, wherein the half sole of the A is 1.5mm thick, and the heel is 3.5mm thick; the half sole of the B style is 2.5mm in thickness and the heel of the B style is 5.5mm in thickness, and the half sole of the C style is 3.5mm in thickness and the heel of the C style is 7.5mm in thickness.
9. The method for designing a fat-thin last according to claim 1, wherein: and after the third step is finished, performing last back heightening operation according to the three-dimensional last model which is finished with the segmented fat and thin grading.
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| CN103020344B (en) * | 2012-12-05 | 2015-04-22 | 合肥工业大学 | Method for designing shoe trees based on geometrical characteristics of feet or shoe trees |
| CN104939437B (en) * | 2015-07-02 | 2017-07-18 | 广州那摩荙时尚电子商务股份有限公司 | A kind of three-dimensional shoe last model structure method for designing based on different foot type |
| CN108308789A (en) * | 2017-11-22 | 2018-07-24 | 广州万思拓材料科技有限公司 | A kind of personal customization foot based on 3D printing steps on component and preparation method thereof |
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