GB2165612A - Nail for footwear and method of making same - Google Patents
Nail for footwear and method of making same Download PDFInfo
- Publication number
- GB2165612A GB2165612A GB08520442A GB8520442A GB2165612A GB 2165612 A GB2165612 A GB 2165612A GB 08520442 A GB08520442 A GB 08520442A GB 8520442 A GB8520442 A GB 8520442A GB 2165612 A GB2165612 A GB 2165612A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nail
- shank
- footwear
- head
- cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 238000004080 punching Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B15/00—Nails; Staples
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/20—Nails, pegs, pins, clamps, or tacks, for footwear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Forging (AREA)
Abstract
A nail for footwear, the nail having a shank (2) with a cylindrical part (3) extending from a head (1) to approximately half way down the nail and this is followed by a part (4) of polygonal section, preferably square, the shank terminating in a pyramidal point (5). A method of making the nail comprises gripping wire between two dies to form the cylindrical and polygonal-section parts (3, 4), punching the projecting part of the wire to form the head (1), and cutting the wire by means of a further die to form the point (5). <IMAGE>
Description
SPECIFICATION
Nail for footwear and method of making same
This invention relates to a nail for footwear and to a method of making same.
When making shoes, a nailing operation is often carried out to attach a sole to turnedover edges of an upper. This operation is carried out by driving several nails, usually by means of an automatic machine, into the sole.
The nails are bent over, on the side of the upper, inside the shoe, with the aid of a last.
The nails used for this operation either have a cylindrical shank or a pyramidal shank with a square section.
Nails having a cylindrical shank are particularly suitable for use with the automatic machines, since they can easily be placed by means of such machines in the appropriate position, but they require a relatively high degree of force to drive them home. Also, in the process of striking the nails on the last, they may be upset and deformed in an irregular manner, thereby detracting from the appearance and effectiveness of the nailing.
Pyramidal nails, or tacks, which are quite widespread, have four edges along their shank. These nails require less force than the cylindrical nails to drive them home. Also, because they have progressively decreasing sections of resistance, they bend over in a regular manner on the upper when they are driven in. However, because of their shape, with their flat oblique surfaces, they are difficult to use in the automatic machines. Also, since there are often four pieces of moulding burr present, frequently extending as far as the lower surface of the head of the nail, these can cause the nailing machine to jam and cause cuts in the material of the upper, which may contribute to splits occurring.
The problem therefore arises of making a nail for footwear which can be readily driven in by an automatic nailing machine, requiring limited force for this purpose, involving a lesser degree of stress and thus longer life for the machine itself, and the nail being bent over correctly onto the upper when it is driven in. Such a nail should be able to be made according to a rapid and economical method, without exhibiting burr or machining defects.
According to one aspect of the present invention, there is provided a nail for footwear, the nail comprising a flat head and a shank, said shank having a cylindrical part extending from said head, said cylindrical part leading
into a part of polygonal cross-section, this latter part terminating in a multi-sided point.
The part of polygonal cross-section may be square.
The multi-sided point may be pyramidal.
The cylindrical part and the part of polygonal cross-section may be of substantially the same length. In addition, in order to avoid bending or breakages of the head of the nail between said cylindrical part and said head, a frustoconical reinforcement joint can be provided.
According to the second aspect of the present invention, there is provided footwear incorporating nails each essentially as defined in said one aspect of the invention.
According to a third aspect of the present invention, there is provided a method of making a nail for footwear, the method including gripping a wire between two dies, each with an impression having one part with a semicylindrical surface to form a cylindrical part of the shank of a nail, and one part with matching polygonal surfaces to form a part of the shank having a polygonal cross-section leading on from said cylindrical part, punching a part of said wire projecting from the dies beyond said one part to form a head of the nail, and cutting said wire by means of another die at the end of said second part and shaping it to a muiti-sided point.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing, in which:
Figure 1 is a diagrammatic side view of a nail for footwear,
Figure 2 is a diagrammatic view illustrating the nail of Fig. 1 positioned and driven into the sole of a shoe, and
Figure 3 is a schematic view of a die for making the nail.
The nail shown in Fig. 1 includes a head 1 joined to a shank 2 which has an upper cylindrical part 3 and a lower part 4 of square cross-section, with the diagonal equal to the diameter of the cylindrical part 3, and terminating in a pyramidal point 5. A frustoconical joint 6 is provided between the head 1 and the shank 3 in order to strengthen the connection of the head to the shank.
As shown in Fig. 2, the square section part 4, when the nail is driven into the sole of a shoe 7, in order to secure it to an upper 8, since it has less resistance, can be hammered and bent over without bending or upsetting the cylindrical part 3, which has a section of greater resistance.
The present nail can be produced with known machines, from wire, using a die 9 such as that shown schematically in Fig. 3.
The die 9 has two pieces, each having a part
10 with semi-cylindrical surfaces, capable of gripping a steel wire from which the nail is to
be made, and a part 11 with identical flat
rectangular surfaces 1 1 A and 1 1 B.
When the wire is gripped in the die, the
opposing parts 10 form the cylindrical part 3
of the nail and the opposing parts 11A and 1 1B form the part 4 of square cross-section.
A punch deforms a projecting part 12 of the wire to make the head 1 of the nail and a flared portion 13 provides for the formation of the frustoconical portion 6. An additional die, not shown, then cuts the wire at the end that forms the free end of the shank 4 in order to make the pyramidal point 5.
The present nail can be used to advantage in automatic nailing machines, its handling being facilitated by the presence of the cylindrical parts 3, whilst the part 4 makes for easy penetration, requiring less effort than that which is necessary with a totally cylindrical nail.
Claims (10)
1. A nail for footwear, the nail comprising a flat head and a shank, said shank having a cylindrical part extending from said head, said cylindrical part leading into a part of polygonal cross-section, this latter part terminating in a multi-sided point.
2. A nail according to claim 1, wherein said part of polygonal cross-section is square.
3. A nail according to claim 1 or 2, wherein said multi-sided point is pyramidal.
4. A nail according to claim 1, 2 or 3, wherein said cylindrical part and said part of polygonal cross-section are of the same length.
5. A nail according to any one of the preceding claims, wherein a frustoconical part interconnects said head with said shank.
6. A nail for footwear, substantially as hereinbefore described with reference to the accompanying drawing.
7. Footwear incorporating nails each in accordance with any one of the preceding claims.
8. A method of making a nail for footwear, the method including gripping a wire between two dies, each with an impression having one part with a semi-cylindrical surface to form a cylindrical part of the shank of a nail, and one part with matching polygonal surfaces to form a part of the shank having a polygonal crosssection leading on from said cylindrical part, punching a part of said wire projecting from the dies beyond said one part to form a head of the nail, and cutting said wire by means of another die at the end of said second part and shaping it to a multi-sided point.
9. A method according to claim 7, wherein said second part of said two dies has two identical flat rectangular surfaces with the apex on the centre line.
10. A method of making a nail for footwear, substantially as hereinbefore described with reference to the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT22574/84A IT1176680B (en) | 1984-09-07 | 1984-09-07 | NAIL ESPECIALLY FOR FOOTWEAR WITH STEM HAVING A CYLINDRICAL PORTION AND A PORTION NEXT TO THE TOE WITH SQUARE SECTION AND RELATED MANUFACTURING METHOD |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8520442D0 GB8520442D0 (en) | 1985-09-18 |
GB2165612A true GB2165612A (en) | 1986-04-16 |
GB2165612B GB2165612B (en) | 1988-02-10 |
Family
ID=11197992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08520442A Expired GB2165612B (en) | 1984-09-07 | 1985-08-15 | Nail for footwear and method of making same |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE3530086C2 (en) |
ES (1) | ES288400Y (en) |
FR (1) | FR2570139B1 (en) |
GB (1) | GB2165612B (en) |
IT (1) | IT1176680B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6842977B2 (en) * | 2000-12-13 | 2005-01-18 | Denso Corporation | Method of manufacturing metallic wire segment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB275238A (en) * | 1926-07-27 | 1927-10-06 | George Albert Curtis | Clinching wire nails |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE287638C (en) * | ||||
US1033159A (en) * | 1911-11-14 | 1912-07-23 | George A Curtis | Shoe-nail. |
CH61491A (en) * | 1912-07-17 | 1913-10-01 | Carl Lehr | Wire nail |
FR500348A (en) * | 1918-10-12 | 1920-03-08 | John Thomas Claydon | Advanced wire point |
AT97375B (en) * | 1922-12-14 | 1924-06-25 | Frank Humphris | Machine for the production of nails, rivets, pins, etc. like |
US1591810A (en) * | 1925-02-10 | 1926-07-06 | L F Grammes & Sons Inc | Clinching nail |
DE471134C (en) * | 1926-06-04 | 1929-02-06 | Friedrich Wilhelm Von Dreusche | Shoe bag |
FR638247A (en) * | 1926-07-27 | 1928-05-19 | Shoe nail | |
GB638247A (en) * | 1948-02-27 | 1950-06-07 | George Kendrick Findlay | Improvements in or relating to the construction of buildings |
CH290055A (en) * | 1949-07-25 | 1953-04-15 | Meyer Roth & Pastor Fa | Method and machine for the production of wire stacks. |
-
1984
- 1984-09-07 IT IT22574/84A patent/IT1176680B/en active
-
1985
- 1985-07-29 ES ES1985288400U patent/ES288400Y/en not_active Expired
- 1985-08-15 GB GB08520442A patent/GB2165612B/en not_active Expired
- 1985-08-22 DE DE3530086A patent/DE3530086C2/en not_active Expired - Fee Related
- 1985-09-02 FR FR858513017A patent/FR2570139B1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB275238A (en) * | 1926-07-27 | 1927-10-06 | George Albert Curtis | Clinching wire nails |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6842977B2 (en) * | 2000-12-13 | 2005-01-18 | Denso Corporation | Method of manufacturing metallic wire segment |
Also Published As
Publication number | Publication date |
---|---|
IT1176680B (en) | 1987-08-18 |
FR2570139B1 (en) | 1989-04-07 |
IT8422574A0 (en) | 1984-09-07 |
ES288400U (en) | 1986-01-01 |
GB8520442D0 (en) | 1985-09-18 |
GB2165612B (en) | 1988-02-10 |
FR2570139A1 (en) | 1986-03-14 |
ES288400Y (en) | 1986-08-01 |
DE3530086C2 (en) | 1995-08-10 |
DE3530086A1 (en) | 1986-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950815 |