CA2323217A1 - A rope comprising complementary gripping means - Google Patents
A rope comprising complementary gripping means Download PDFInfo
- Publication number
- CA2323217A1 CA2323217A1 CA002323217A CA2323217A CA2323217A1 CA 2323217 A1 CA2323217 A1 CA 2323217A1 CA 002323217 A CA002323217 A CA 002323217A CA 2323217 A CA2323217 A CA 2323217A CA 2323217 A1 CA2323217 A1 CA 2323217A1
- Authority
- CA
- Canada
- Prior art keywords
- rope
- cord
- strands
- produced
- gripping
- 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.)
- Abandoned
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B11/00—Ski lift, sleigh lift or like trackless systems with guided towing cables only
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1024—Structures that change the cross-sectional shape
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/209—Jackets or coverings comprising braided structures
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2046—Polyamides, e.g. nylons
- D07B2205/205—Aramides
Abstract
A rope (1) comprising a main cord (2) and attached complementary gripping means (5), which comprise at least one gripping member (6) associated with the said cord (2) along a portion (7) thereof, forming a protrusion (8) on the cord (2) in order to locally increase the diameter of the rope (1).
Description
The invention concerns a rope, and a device for pulling skiers comprising such a rope.
The invention applies in particular to mechanical ascent installations, comprising a device for pulling skiers up slight slopes.
This type of device comprises an endless rope looped upon itself, driven and guided by a set of pulleys. In order to ascend the slope, the skiers grip and hold the rope, which tows them to their destination.
This type of installation, described in the document FR-A-2 742 400, normally comprises a smooth rope, which hay drawbacks in this type of application in particular.
This is because the skiers, who wear mittens or gloves, experience difficulties in holding the smooth cord being gripped without the latter sliding between their hands, particularly if the slope has areas with a steep slope.
In principal, one solution can consist of making regularly spaced knots on the cord, so as to form on the rope bulges which facilitate its being gripped by hand and held throughout the period of a towing.
However, the knots cannot pass through the pulleys correctly, which makes a rope with knots unusable in this type of application.
Another solution could consist of fixing regularly spaced grips to the rope. However, the grips have a volume such that they too do not pass through the pulleys, and are liable to hook onto~obstacles when the rope drags level with the ground.
The invention aims to resolve in particular the aforementioned drawbacks, by proposing a rope which has complementary gripping means able on the one hand to facilitate the gripping of the rope by a user such as a skier, and on the other hand allowing passage of the rope through a driving and/or guidance pulley, whilst offering good strength over time.
To this end, a first object of the invention is a rope comprising a main cord, which also has complementary gripping means attached.
These gripping means comprise at least one gripping member associated with the said cord along a portion thereof, forming a protrusion on the cord in order to locally increase the diameter of the rope.
This rope thus has improved ergonomics compared with conventional ropes.
The invention applies in particular to mechanical ascent installations, comprising a device for pulling skiers up slight slopes.
This type of device comprises an endless rope looped upon itself, driven and guided by a set of pulleys. In order to ascend the slope, the skiers grip and hold the rope, which tows them to their destination.
This type of installation, described in the document FR-A-2 742 400, normally comprises a smooth rope, which hay drawbacks in this type of application in particular.
This is because the skiers, who wear mittens or gloves, experience difficulties in holding the smooth cord being gripped without the latter sliding between their hands, particularly if the slope has areas with a steep slope.
In principal, one solution can consist of making regularly spaced knots on the cord, so as to form on the rope bulges which facilitate its being gripped by hand and held throughout the period of a towing.
However, the knots cannot pass through the pulleys correctly, which makes a rope with knots unusable in this type of application.
Another solution could consist of fixing regularly spaced grips to the rope. However, the grips have a volume such that they too do not pass through the pulleys, and are liable to hook onto~obstacles when the rope drags level with the ground.
The invention aims to resolve in particular the aforementioned drawbacks, by proposing a rope which has complementary gripping means able on the one hand to facilitate the gripping of the rope by a user such as a skier, and on the other hand allowing passage of the rope through a driving and/or guidance pulley, whilst offering good strength over time.
To this end, a first object of the invention is a rope comprising a main cord, which also has complementary gripping means attached.
These gripping means comprise at least one gripping member associated with the said cord along a portion thereof, forming a protrusion on the cord in order to locally increase the diameter of the rope.
This rope thus has improved ergonomics compared with conventional ropes.
Its gripping is better than that of a conventional smooth rope, whilst it can also, just like a smooth rope, and unlike ropes having grips or knots, pass through guidance pulleys.
According to one embodiment, the main cord is produced by interleaving fibres referred to as primary strands, the gripping member comprising supplementary strands referred to as secondary strands, incorporated in the cord by interleaving between the main strands.
For example, the secondary strands are braided between the primary strands, the latter themselves being braided together in order to form the cord.
According to one embodiment, the secondary strands are produced at least partly from a flexible elastic material such as an elastomer, and/or at least partly from a semi-rigid material such as a polymer.
According to one embodiment, the complementary gripping means comprise a plurality of gripping members associated with the cord and regularly spaced apart thereon.
A second object of the invention is a device for pulling skiers by means of a rope continuously moving on a closed-loop path between departure and arrival locations.
Each of the locations is equipped with at least one end pulley, the rope comprising a pulling length at the level of the snow in order to be able to be gripped by the skier, and a return length supported at a height by masts above the skiers, the rope being a rope such as the one which has just been described.
According to one embodiment, the main cord is produced by interleaving fibres referred to as primary strands, the gripping member comprising supplementary strands referred to as secondary strands, incorporated in the cord by interleaving between the main strands.
For example, the secondary strands are braided between the primary strands, the latter themselves being braided together in order to form the cord.
According to one embodiment, the secondary strands are produced at least partly from a flexible elastic material such as an elastomer, and/or at least partly from a semi-rigid material such as a polymer.
According to one embodiment, the complementary gripping means comprise a plurality of gripping members associated with the cord and regularly spaced apart thereon.
A second object of the invention is a device for pulling skiers by means of a rope continuously moving on a closed-loop path between departure and arrival locations.
Each of the locations is equipped with at least one end pulley, the rope comprising a pulling length at the level of the snow in order to be able to be gripped by the skier, and a return length supported at a height by masts above the skiers, the rope being a rope such as the one which has just been described.
Other objects and advantages of the invention will emerge during the following description of embodiments, a description given with reference to the accompanying drawings, in which:
- Figure 1 is a partial plan view of a rope according to the invention, which comprises a main cord produced by an interleaving of fibers referred to as primary strands, and a gripping member produced from supplementary strands referred to as secondary strands, this member being associated with the main cord of the rope by interleaving of the secondary strands in the primary strands of the cord, and forming a protrusion on this cord;
- Figure 2 is a schematic view in elevation of a pulling device for skiers, which comprises a rope according to the invention, for example the rope of Figure 1, moving continuously on a path in closed loop.
Figure 1 depicts a rope 1, comprising notably a main cord 2 which, according to one embodiment, is produced by the interleaving of fibers 3 referred to as primary strands.
In the embodiment illustrated in Figure 1, the cord 2 is produced from eight primary strands 3, produced from a synthetic material such as polyamide or polyester, KEVLAR°, or equivalent, and braided together.
In this way, the cord has a low elongation modulus and good resistance on the one hand to ultraviolet radiation and on the other hand to twisting.
This design of the cord 2 is given by way of example, the invention being able to be applied to any type of cord 2, for example of the mountaineering rope type, which comprises an internal braid covered with braided fibres, or of the potholing rope type, which comprises a core of parallel fibres covered with braided fibres.
- Figure 1 is a partial plan view of a rope according to the invention, which comprises a main cord produced by an interleaving of fibers referred to as primary strands, and a gripping member produced from supplementary strands referred to as secondary strands, this member being associated with the main cord of the rope by interleaving of the secondary strands in the primary strands of the cord, and forming a protrusion on this cord;
- Figure 2 is a schematic view in elevation of a pulling device for skiers, which comprises a rope according to the invention, for example the rope of Figure 1, moving continuously on a path in closed loop.
Figure 1 depicts a rope 1, comprising notably a main cord 2 which, according to one embodiment, is produced by the interleaving of fibers 3 referred to as primary strands.
In the embodiment illustrated in Figure 1, the cord 2 is produced from eight primary strands 3, produced from a synthetic material such as polyamide or polyester, KEVLAR°, or equivalent, and braided together.
In this way, the cord has a low elongation modulus and good resistance on the one hand to ultraviolet radiation and on the other hand to twisting.
This design of the cord 2 is given by way of example, the invention being able to be applied to any type of cord 2, for example of the mountaineering rope type, which comprises an internal braid covered with braided fibres, or of the potholing rope type, which comprises a core of parallel fibres covered with braided fibres.
The primary strands 3 can also be twisted, that is to say interleaved so as to form a helix.
For example, the cord thus obtained has a diameter of around 16 millimetres approximately, which affords a good grip of the rope 1 in the hand by users 4 of all ages.
In one of its applications, the rope 1 is in fact intended to be gripped by users 4 such as skiers. In order to improve its holding by the users 4, the rope 1 also comprises complementary gripping means 5.
These gripping means comprise at least one gripping member 6, associated with the cord 2 along a portion 7 thereof, this portion 7 having a length substantially equal to the width of a hand.
The gripping member 6 forms a protrusion 8 on the cord 2, in order to locally increase the diameter of the rope 1 along the portion 7 so as to facilitate the gripping thereof by hand.
According to a first embodiment, illustrated in Figure 1, the gripping member 6 comprises supplementary strands 9 referred to as secondary strands, of finite length, substantially equal to the length of the portion 7, and incorporated in the cord 2 by interleaving between the main strands 3.
For example, the secondary strands 9 are woven between the primary strands 3, by a method known as overbraiding. This embodiment has the advantage of great ease. of implementation, the braiding of the secondary strands 9 being able to be carried out by hand.
This braiding can be carried out by locally slacking the cord 2 so as to create, between the primary strands 3, sufficient spaces to allow the insertion of the secondary strands 9.
Each secondary strand 9 is inserted in the cord 2 in a direction indicated by the arrow F in Figure 1, from a first end 10 of the secondary strand 9, buried in the core of the cord, as far as a second, free, end 11 of the secondary strand 9.
Once the overbraiding has been completed, the secondary strand 9 is for example cut, so that its free end 11 fits flush with the external surface 12 of the cord.
The secondary strands 9 can be produced from the same materials as the primary strands 3, for example from fibres of polyamide or polyester, KEVLAR~, or equivalent.
According to one variant, the secondary strands 9 are produced at least partly from a flexible elastic material such as an elastomer, which offers good adhesion properties, so as to facilitate the gripping by hand by the user 4 of the gripping member 6.
According to another variant, the secondary strands 9 are produced at least partly from a semi-rigid material such as a polymer.
For example, the cord thus obtained has a diameter of around 16 millimetres approximately, which affords a good grip of the rope 1 in the hand by users 4 of all ages.
In one of its applications, the rope 1 is in fact intended to be gripped by users 4 such as skiers. In order to improve its holding by the users 4, the rope 1 also comprises complementary gripping means 5.
These gripping means comprise at least one gripping member 6, associated with the cord 2 along a portion 7 thereof, this portion 7 having a length substantially equal to the width of a hand.
The gripping member 6 forms a protrusion 8 on the cord 2, in order to locally increase the diameter of the rope 1 along the portion 7 so as to facilitate the gripping thereof by hand.
According to a first embodiment, illustrated in Figure 1, the gripping member 6 comprises supplementary strands 9 referred to as secondary strands, of finite length, substantially equal to the length of the portion 7, and incorporated in the cord 2 by interleaving between the main strands 3.
For example, the secondary strands 9 are woven between the primary strands 3, by a method known as overbraiding. This embodiment has the advantage of great ease. of implementation, the braiding of the secondary strands 9 being able to be carried out by hand.
This braiding can be carried out by locally slacking the cord 2 so as to create, between the primary strands 3, sufficient spaces to allow the insertion of the secondary strands 9.
Each secondary strand 9 is inserted in the cord 2 in a direction indicated by the arrow F in Figure 1, from a first end 10 of the secondary strand 9, buried in the core of the cord, as far as a second, free, end 11 of the secondary strand 9.
Once the overbraiding has been completed, the secondary strand 9 is for example cut, so that its free end 11 fits flush with the external surface 12 of the cord.
The secondary strands 9 can be produced from the same materials as the primary strands 3, for example from fibres of polyamide or polyester, KEVLAR~, or equivalent.
According to one variant, the secondary strands 9 are produced at least partly from a flexible elastic material such as an elastomer, which offers good adhesion properties, so as to facilitate the gripping by hand by the user 4 of the gripping member 6.
According to another variant, the secondary strands 9 are produced at least partly from a semi-rigid material such as a polymer.
The production of the gripping member 6 by a combination of secondary strands 9 made of elastomer or polymer or produced from synthetic fibers can also be provided for, so as to combine the properties of the materials.
In addition, the secondary strands 9 can be in a colour distinct from that of the primary strands 3, to allow easy location of the gripping member 6 by the user 4 (Figure 1).
To enable the rope 1 to be gripped by several users 4 , the rope 1 comprises a plurality of gripping members 6 such as the ones which have just been described, associated with the cord 2 and regularly spaced apart thereon, for example substantially every three metres, or every four metres.
The rope 1 thus produced can be used in a device 14 for pulling skiers 4, illustrated in Figure 2.
In this device 14, the rope continuously passes along a path, in a closed loop between departure 15 and arrival 16 locations, in a single direction F' chosen so that it is the reverse of the direction of braiding F of the secondary strands 9.
In this way, the free ends 11 of the secondary strands 9 do not hook on the pulleys 17, 18 during the passage of the gripping member 6 through them. The service life of the rope 1 is thereby increased.
Each of the locations 15, 16 is equipped with at least one end pulley 17, 18, which guides the rope 1. The latter comprises a pulling length 19 at the level of the snow in order to be gripped by the skier 4, and a return length 20 supported at a height by masts 21 above the skiers.
This type of device, which is the object of the patent S application FR-2 742 400 in the name of the applicant, is already described in detail in this document; it is therefore unnecessary to describe it any further here.
The use of the rope 1, which comprises complementary gripping means 5, enables the users 4 to better hold the rope 1 by gripping the gripping members 6, and not to slip on the rope 1.
Thus the users 4 on the one hand can climb greater slopes than those on which the known pulling devices with a smooth rope are installed, and on the other hand can travel longer distances.
In addition, the secondary strands 9 can be in a colour distinct from that of the primary strands 3, to allow easy location of the gripping member 6 by the user 4 (Figure 1).
To enable the rope 1 to be gripped by several users 4 , the rope 1 comprises a plurality of gripping members 6 such as the ones which have just been described, associated with the cord 2 and regularly spaced apart thereon, for example substantially every three metres, or every four metres.
The rope 1 thus produced can be used in a device 14 for pulling skiers 4, illustrated in Figure 2.
In this device 14, the rope continuously passes along a path, in a closed loop between departure 15 and arrival 16 locations, in a single direction F' chosen so that it is the reverse of the direction of braiding F of the secondary strands 9.
In this way, the free ends 11 of the secondary strands 9 do not hook on the pulleys 17, 18 during the passage of the gripping member 6 through them. The service life of the rope 1 is thereby increased.
Each of the locations 15, 16 is equipped with at least one end pulley 17, 18, which guides the rope 1. The latter comprises a pulling length 19 at the level of the snow in order to be gripped by the skier 4, and a return length 20 supported at a height by masts 21 above the skiers.
This type of device, which is the object of the patent S application FR-2 742 400 in the name of the applicant, is already described in detail in this document; it is therefore unnecessary to describe it any further here.
The use of the rope 1, which comprises complementary gripping means 5, enables the users 4 to better hold the rope 1 by gripping the gripping members 6, and not to slip on the rope 1.
Thus the users 4 on the one hand can climb greater slopes than those on which the known pulling devices with a smooth rope are installed, and on the other hand can travel longer distances.
Claims (7)
1. A rope (1) comprising a main cord (2) , characterised in that it comprises attached complementary gripping means (5), which comprise at least one gripping member (6) associated with the said cord (2) along a portion (7) thereof, forming a protrusion (8) on the cord (2) in order to locally increase the diameter of the rope (1).
2. A rope (1) according to Claim 1, characterised in that the main cord (2) is produced by interleaving fibers (3) referred to as primary strands, the gripping member (6) comprising supplementary strands (9) referred to as secondary strands, incorporated in the cord (2) by interleaving between the primary strands (3).
3. A rope (1) according to Claim 2, characterised in that the said secondary strands (9) are braided between the said primary strands (3), the latter themselves being braided together to form the cord (2).
4. A rope (1) according to Claim 2, characterised in that the said secondary strands (9) are produced at least partly from a flexible elastic material such as an elastomer.
5. A rope (1) according to Claim 2, characterised in that the said secondary strands (9) are produced at least partly from a semi-rigid material such as a polymer.
6. A rope (1) according to Claim 1, characterised in that the complementary gripping means (5) comprise a plurality of gripping members (6) associated with the cord (2) and regularly spaced apart thereon.
7. A device (14) for pulling skiers (4) by means of a rope (1) moving continuously on a path in a closed loop between departure (15) and arrival (16) locations, each equipped with at least one end pulley (17, 18), the rope (1) comprising a pulling length (19) at the level of the snow in order to be able to be gripped by the skier (4), and a return length (20) supported at a height by masts (21) above the skiers (4), characterised in that the rope (1) is a rope (1) according to one of Claims 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9912902A FR2799711B1 (en) | 1999-10-15 | 1999-10-15 | ROPE COMPRISING ADDITIONAL GRIPPING MEANS |
| FR9912902 | 1999-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2323217A1 true CA2323217A1 (en) | 2001-04-15 |
Family
ID=9550992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002323217A Abandoned CA2323217A1 (en) | 1999-10-15 | 2000-10-11 | A rope comprising complementary gripping means |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1092605A1 (en) |
| AT (1) | AT4446U3 (en) |
| CA (1) | CA2323217A1 (en) |
| FR (1) | FR2799711B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619514B (en) * | 2009-07-10 | 2013-03-13 | 浙江朗德实业有限公司 | High-reliability knitted polyester harness cord |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011017273B4 (en) * | 2011-04-15 | 2019-10-17 | Edelrid Gmbh & Co. Kg | climbing rope |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE234890C (en) * | 1909-04-19 | |||
| FR805466A (en) * | 1935-05-08 | 1936-11-20 | Frederico Molero Gimenez | Carrier cable device for winter sports resort |
| US2301843A (en) * | 1941-02-21 | 1942-11-10 | Edward G Abdella | Hand grip for use on rope type ski tows |
| US2582630A (en) * | 1948-12-01 | 1952-01-15 | Robert F Hoffman | Ski tow rope grip |
| US3209703A (en) * | 1963-10-23 | 1965-10-05 | John P Brebner | Ski lift safety device |
| AT308822B (en) * | 1971-01-28 | 1973-07-25 | Rudolf Gruell | Transportable small drag lift |
| US4098196A (en) * | 1976-02-26 | 1978-07-04 | Weihe Jr Clyde R | Portable ski tow hoist |
| FR2726585A1 (en) * | 1994-11-09 | 1996-05-10 | Fortin Jean | Shrouding for a cable |
| FR2742400B1 (en) | 1995-12-14 | 1998-02-20 | Montagner Sa | DEVICE FOR TRAINING SKIERS |
| DE29608971U1 (en) * | 1996-05-20 | 1996-08-22 | Teufelberger Gmbh | Rope for taking along and passing on paper webs in the production of paper and cardboard on paper machines |
-
1999
- 1999-10-15 FR FR9912902A patent/FR2799711B1/en not_active Expired - Fee Related
-
2000
- 2000-10-11 EP EP00402811A patent/EP1092605A1/en not_active Withdrawn
- 2000-10-11 CA CA002323217A patent/CA2323217A1/en not_active Abandoned
-
2001
- 2001-05-09 AT AT0036401U patent/AT4446U3/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619514B (en) * | 2009-07-10 | 2013-03-13 | 浙江朗德实业有限公司 | High-reliability knitted polyester harness cord |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1092605A1 (en) | 2001-04-18 |
| FR2799711B1 (en) | 2002-01-11 |
| AT4446U3 (en) | 2002-02-25 |
| FR2799711A1 (en) | 2001-04-20 |
| AT4446U2 (en) | 2001-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |