CA2451322C - Light structural core and method for the production thereof - Google Patents
Light structural core and method for the production thereof Download PDFInfo
- Publication number
- CA2451322C CA2451322C CA002451322A CA2451322A CA2451322C CA 2451322 C CA2451322 C CA 2451322C CA 002451322 A CA002451322 A CA 002451322A CA 2451322 A CA2451322 A CA 2451322A CA 2451322 C CA2451322 C CA 2451322C
- Authority
- CA
- Canada
- Prior art keywords
- grooves
- ski
- slits
- core
- light
- 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.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/12—Making thereof; Selection of particular materials
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C2201/00—Use of skates, skis, roller-skates, snowboards and courts
- A63C2201/04—Ski jumping
Landscapes
- Laminated Bodies (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to a light structural core made of wood for sliding bodies, for example skis, especially cross-country skis, having grooves or slots (3) arranged in the longitudinal rows, extending in lines in a staggered manner in the longitudinal direction of the skis. The grooves or slots (3) are only open towards the running surface. When seen from a longitudinal section, said grooves or slots are shaped like the arc of a circle or are provided lengthwise with rounded corners.
Description
Light Structural Core And Method For The Production Thereof The invention relates to a light-weight construction core made of wood for a ski having a binding region and a running surface.
The light-weight construction core is particularly usable to be incorporated in alpine skis, cross-country skis, jumping skis and other types of skis or the like sliding bodies.
A further object of the invention is a method of producing the light-weight construction core.
So far, honeycomb-type cores have been used for reducing the weight of ttle subject skis.
From AT 231 323 B a ski has become known in which a core consisting of a honeycomb core material with cell foils provided in vertical position, is arranged between a supporting top and a supporting bottom cover sheet, the cel?. foils which are made of a corrugated material being oriented parallel to each other and to the lontigudinal ski axis and extending over the entire height of the ski core. The corrugated foils not on1_y render the production of the ski lnconvenlent, but it has also been shown that such a ski will meet the de-mands made thereon in terms of torsional stiffness and flexural strength only if certain specific construction features are provided; particularly so in case of a cross-country ski.
From DE-OS 19 16 043, a construction part for a ski designed as a foamed body has become known which has recesses which are already left clear during the production of the foamed body by insertion of cyl-indrical elements and do not have an offset arrange-ment.
From DE 36 39 411 Al, a ski core has become known which consists of side coats of a synthetic or plastic material, and a composite insert made of wood, which is provided with incisions from both the top and bottom sides and which is elastically compressible in trans-verse direction so as to obtain a ski with a waist.
On the other hand, the present invention has as its object to provide a light-weight construction core which has good strength properties with a high reduc-tion of weight, and which, moreover, makes it possible to anchor binding screws on the remainder of the core surface.
The light-weight construction core is particularly usable to be incorporated in alpine skis, cross-country skis, jumping skis and other types of skis or the like sliding bodies.
A further object of the invention is a method of producing the light-weight construction core.
So far, honeycomb-type cores have been used for reducing the weight of ttle subject skis.
From AT 231 323 B a ski has become known in which a core consisting of a honeycomb core material with cell foils provided in vertical position, is arranged between a supporting top and a supporting bottom cover sheet, the cel?. foils which are made of a corrugated material being oriented parallel to each other and to the lontigudinal ski axis and extending over the entire height of the ski core. The corrugated foils not on1_y render the production of the ski lnconvenlent, but it has also been shown that such a ski will meet the de-mands made thereon in terms of torsional stiffness and flexural strength only if certain specific construction features are provided; particularly so in case of a cross-country ski.
From DE-OS 19 16 043, a construction part for a ski designed as a foamed body has become known which has recesses which are already left clear during the production of the foamed body by insertion of cyl-indrical elements and do not have an offset arrange-ment.
From DE 36 39 411 Al, a ski core has become known which consists of side coats of a synthetic or plastic material, and a composite insert made of wood, which is provided with incisions from both the top and bottom sides and which is elastically compressible in trans-verse direction so as to obtain a ski with a waist.
On the other hand, the present invention has as its object to provide a light-weight construction core which has good strength properties with a high reduc-tion of weight, and which, moreover, makes it possible to anchor binding screws on the remainder of the core surface.
According to the invention, this object is achieved by a light-weight construction core made of wood for a ski having a binding region and a running surface, including grooves or slits arranged in longitudinal rows, wherein the grooves or slits extend longitudinally along the ski and are offset row-wise relative to each other, characterized in that the grooves or slits in the binding region are formed to be open towards the running surface only, and when viewed longitudinally, are designed to be circular-arc-shaped or elongate having rounded corners.
Further features of the invention will be ex-plained in more detail by way of the drawings in which two exemplary embodiments of the subject matter of the invention have been illustrated.
Further features of the invention will be ex-plained in more detail by way of the drawings in which two exemplary embodiments of the subject matter of the invention have been illustrated.
Fig. 1 shows a middle cross-section of a double core in the direction of arrow I-I of Fig. 2;
Fig. 2 shows a bottom view of the core according to Fig. 1 in the direction of arrow II-II;
Fig. 3 shows a section in the direction of the ar-row III-III of Fig. 2;
Fig. 4 shows a cross-section of a double core sim-ilar to the embodiment according to Fig. 1, wherein the adhesive bonding of the individual boards is indicated;
and Fig. 5 shows a section according to line V-V of Fig. 4.
In Fig. 1, a double core is indicated by 1 which is adhesive-bonded of lamellae extending in the longit-udinal direction of the ski. From the running surface side, grooves 3 or slits, respectively, are cut into the core 1, preferably by incisions made by means of a circular saw, which grooves are arranged in successive rows 4 extending parallel to the longitudinal axis A-A
of the ski, the successive grooves 3 having equal lengths and, in the present case, being offset by half a groove length relative to the grooves of the neigh-boring row. By moving the saw blade or the saw blades, respectively, in parallel to the longitudinal axis A-A
of the ski, or in the longitudinal axis of the latter, respectively, as shown in Fig. 3, elongate grooves hav-ing rounded corners 2 are produced. Of course, it is also possible to move the ski relative to the saw blade in the longitudinal direction of the ski. What is es-sential is that when making grooves extending in lon-gitudinal direction of the ski, both, a relative movement between ski and saw blade in the longitudinal direction of the ski takes place, and also the circular saw carries out a longitudinal movement in the opposite direction.
The offset of the grooves can be made in any other relationship, uniformly or non-uniformly. In this way, the grooves will be interrupted by the core material either in periodical or in statistical distances, so that with an optimum reduction of the ski weight, there will be a sufficient gluing area for the fastening of belts on the running side, running surface coatings and/or the like, wherein the side walls delimiting the core may be made thicker than the intermediate walls of neighboring grooves so as to attain a lateral pressure stability relative to the transverse axis of the ski and the longitudinal axis of the ski.
As shown in Fig. 3, the grooves extend in the lon-gitudinal direction of the ski and have rounded corners 2.
In the embodiment of the light-weight construction core according to Figs. 4 and 5, the lamellae which are adhesive-bonded to each other are denoted by 6.
In this embodiment of the light-weight construc-tion core, the grooves 3, as shown by Fig. 5, are semi-circular in shape and are formed by simply moving the circular saw into the core 1. The grooves may, of course, also be sector-shaped.
In the double core illustrated, a massive longit-udinal web 7 is provided in the middle region which has twice the width of the lamellae 6 and, when parting the core into individual cores 1', 1", as indicated by dot-and-dash lines, is cut apart.
Within the scope of the invention, of course, also various structural changes may be made. Thus, it is possible to fill the grooves in the region of the screw fastenings with a material in which binding screws or the like fastening means can be introduced.
Fig. 2 shows a bottom view of the core according to Fig. 1 in the direction of arrow II-II;
Fig. 3 shows a section in the direction of the ar-row III-III of Fig. 2;
Fig. 4 shows a cross-section of a double core sim-ilar to the embodiment according to Fig. 1, wherein the adhesive bonding of the individual boards is indicated;
and Fig. 5 shows a section according to line V-V of Fig. 4.
In Fig. 1, a double core is indicated by 1 which is adhesive-bonded of lamellae extending in the longit-udinal direction of the ski. From the running surface side, grooves 3 or slits, respectively, are cut into the core 1, preferably by incisions made by means of a circular saw, which grooves are arranged in successive rows 4 extending parallel to the longitudinal axis A-A
of the ski, the successive grooves 3 having equal lengths and, in the present case, being offset by half a groove length relative to the grooves of the neigh-boring row. By moving the saw blade or the saw blades, respectively, in parallel to the longitudinal axis A-A
of the ski, or in the longitudinal axis of the latter, respectively, as shown in Fig. 3, elongate grooves hav-ing rounded corners 2 are produced. Of course, it is also possible to move the ski relative to the saw blade in the longitudinal direction of the ski. What is es-sential is that when making grooves extending in lon-gitudinal direction of the ski, both, a relative movement between ski and saw blade in the longitudinal direction of the ski takes place, and also the circular saw carries out a longitudinal movement in the opposite direction.
The offset of the grooves can be made in any other relationship, uniformly or non-uniformly. In this way, the grooves will be interrupted by the core material either in periodical or in statistical distances, so that with an optimum reduction of the ski weight, there will be a sufficient gluing area for the fastening of belts on the running side, running surface coatings and/or the like, wherein the side walls delimiting the core may be made thicker than the intermediate walls of neighboring grooves so as to attain a lateral pressure stability relative to the transverse axis of the ski and the longitudinal axis of the ski.
As shown in Fig. 3, the grooves extend in the lon-gitudinal direction of the ski and have rounded corners 2.
In the embodiment of the light-weight construction core according to Figs. 4 and 5, the lamellae which are adhesive-bonded to each other are denoted by 6.
In this embodiment of the light-weight construc-tion core, the grooves 3, as shown by Fig. 5, are semi-circular in shape and are formed by simply moving the circular saw into the core 1. The grooves may, of course, also be sector-shaped.
In the double core illustrated, a massive longit-udinal web 7 is provided in the middle region which has twice the width of the lamellae 6 and, when parting the core into individual cores 1', 1", as indicated by dot-and-dash lines, is cut apart.
Within the scope of the invention, of course, also various structural changes may be made. Thus, it is possible to fill the grooves in the region of the screw fastenings with a material in which binding screws or the like fastening means can be introduced.
Claims (5)
1. A light-weight construction core made of wood for a ski having a binding region and a running surface, including grooves or slits (3) arranged in longitudinal rows, wherein the grooves or slits extend longitudinally along the ski and are offset row-wise relative to each other, characterized in that the grooves or slits (3) in the binding region are formed to be open towards the running surface only, and when viewed longitudinally, are designed to be circular-arc-shaped or elongate having rounded corners.
2. A light-weight construction core according to claim 1, characterized in that the grooves or slits (3) of the neighboring groove rows are offset by half the groove length relative to each other.
3. A method for the production of a light-weight construction core according to claim 1 or claim 2, characterized in that the grooves or slits, which extend longitudinally along the ski, are made by moving circular saw blades into the core material to a maximum depth which is lesser than the thickness of the wood.
4. A method according to claim 3, characterized in that after having moved the circular saws into the core material, said circular saws are moved longitudinally along the ski by the length of the grooves to be produced.
5. A method according to claim 4, characterized in that the neighboring groove rows are offset relative to each other longitudinally along the ski.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0107701A AT410517B (en) | 2001-07-10 | 2001-07-10 | LIGHTWEIGHT CORE AND METHOD FOR PRODUCING THE SAME |
| ATA1077/2001 | 2001-07-10 | ||
| PCT/AT2002/000198 WO2003008052A1 (en) | 2001-07-10 | 2002-07-08 | Light structural core and method for the production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2451322A1 CA2451322A1 (en) | 2003-01-30 |
| CA2451322C true CA2451322C (en) | 2009-02-24 |
Family
ID=3685044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002451322A Expired - Lifetime CA2451322C (en) | 2001-07-10 | 2002-07-08 | Light structural core and method for the production thereof |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1404420B1 (en) |
| JP (1) | JP2004534627A (en) |
| AT (2) | AT410517B (en) |
| CA (1) | CA2451322C (en) |
| DE (1) | DE50201803D1 (en) |
| NO (1) | NO327523B1 (en) |
| RU (1) | RU2283155C2 (en) |
| WO (1) | WO2003008052A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT13391U1 (en) | 2012-12-20 | 2013-12-15 | Fischer Sports Gmbh | Ski, especially touring skis |
| FR3136681B1 (en) * | 2022-06-20 | 2024-08-23 | Salomon Sas | Ski core and ski including such core |
| CA3180089A1 (en) * | 2021-11-03 | 2023-05-03 | Salomon S.A.S. | Core for ski and ski comprising such a core |
| FR3128647B1 (en) * | 2021-11-03 | 2023-12-29 | Salomon Sas | Core for ski and ski including such core |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT231323B (en) | 1961-02-28 | 1964-01-27 | Anton Kaestle | Multi-layer ski |
| AT251456B (en) * | 1964-06-10 | 1967-01-10 | Christine Weber | Component for skis |
| CH501416A (en) * | 1968-03-29 | 1971-01-15 | Bader Albert | Ski component |
| US3734519A (en) * | 1970-10-23 | 1973-05-22 | W Bennett | Molded ski |
| DE2112307A1 (en) * | 1971-03-15 | 1972-10-05 | Head Sportgeraete Gmbh | Plastic skis |
| AT386959B (en) * | 1985-02-07 | 1988-11-10 | Isosport Verbundbauteile | METHOD FOR PRODUCING A COMPONENT FOR A SKI CORE, COMPONENT PRODUCED WITH THIS METHOD, AND SKI WITH SUCH A COMPONENT |
| DE3712030A1 (en) * | 1986-05-27 | 1987-12-03 | Rohrmoser Alois Skifabrik | Structural element for ski mfr. |
| YU44924B (en) | 1986-07-30 | 1991-04-30 | Elan | Kernel of a ski |
| AT390197B (en) * | 1987-12-09 | 1990-03-26 | Head Sportgeraete Gmbh | SKI |
-
2001
- 2001-07-10 AT AT0107701A patent/AT410517B/en not_active IP Right Cessation
-
2002
- 2002-07-08 DE DE50201803T patent/DE50201803D1/en not_active Expired - Lifetime
- 2002-07-08 EP EP02753898A patent/EP1404420B1/en not_active Expired - Lifetime
- 2002-07-08 WO PCT/AT2002/000198 patent/WO2003008052A1/en active IP Right Grant
- 2002-07-08 RU RU2004103740/12A patent/RU2283155C2/en not_active IP Right Cessation
- 2002-07-08 JP JP2003513653A patent/JP2004534627A/en active Pending
- 2002-07-08 AT AT02753898T patent/ATE284741T1/en active
- 2002-07-08 CA CA002451322A patent/CA2451322C/en not_active Expired - Lifetime
-
2004
- 2004-01-09 NO NO20040089A patent/NO327523B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AT410517B (en) | 2003-05-26 |
| NO20040089L (en) | 2004-01-09 |
| RU2283155C2 (en) | 2006-09-10 |
| NO327523B1 (en) | 2009-08-03 |
| ATA10772001A (en) | 2002-10-15 |
| EP1404420B1 (en) | 2004-12-15 |
| CA2451322A1 (en) | 2003-01-30 |
| ATE284741T1 (en) | 2005-01-15 |
| EP1404420A1 (en) | 2004-04-07 |
| WO2003008052A1 (en) | 2003-01-30 |
| DE50201803D1 (en) | 2005-01-20 |
| JP2004534627A (en) | 2004-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20220708 |