EP1013827A1 - Rail fastenings - Google Patents
Rail fastenings Download PDFInfo
- Publication number
- EP1013827A1 EP1013827A1 EP98870276A EP98870276A EP1013827A1 EP 1013827 A1 EP1013827 A1 EP 1013827A1 EP 98870276 A EP98870276 A EP 98870276A EP 98870276 A EP98870276 A EP 98870276A EP 1013827 A1 EP1013827 A1 EP 1013827A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- screw
- primary
- fixing
- opening
- 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.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/66—Rail fastenings allowing the adjustment of the position of the rails, so far as not included in the preceding groups
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
- E01B9/32—Fastening on steel sleepers with clamp members
Definitions
- the present invention relates to a rail fastening device such as rails handling used for example in installations industrial and intended inter alia to support such as a crane or an overhead crane.
- Rail fasteners such as handling rails are well known. They're from preferably arranged opposite one another on each side of the pad of said rails to fix them to a surface of support, preferably flat.
- the first element is the element called “primary” which rests on the surface of the support and which is securely attached to it, either by bolting, either by welding.
- a second element also called “secondary” element, traps the rail, and more particularly the sole or the shoe of the rail, for example by having a side surface overhanging and coming in contact with the sole or the shoe of the rail.
- a third element is provided, which is a means of attachment first and second elements between them. In general, this consists of a screw whose head is introduced into an opening present in the first and in the second element and on which a nut. In order to obtain a correct assembly allowing guarantee the necessary tightening for a perfect fixing of the rail, it is imperative to position very precisely the fixing means.
- Document BE-843657 describes a device for elastic fixing which gives a limited vertical support which allows longitudinal and vertical movement of the rail.
- the opening provided in the different elements is oriented so as to allow a displacement of the fastening means so that the second element can occupy various positions by compared to the first element.
- the opening is further oriented in a direction at an angle to the rail.
- the first and second elements further have cooperating side surfaces that touch each other the relative positions of the two elements, the surfaces preferably extending parallel to the opening axis of said elements.
- the main difficulty lies in the precise positioning of the screw in order to block and lock the entire fastening device on the rail thus avoiding any displacement thereof.
- the fixing device requires the presence of at least four pieces, and preferably five parts, for fixing the rail. Since such rails are arranged on building sites, and sometimes in delicate positions, a large number of pieces, in especially small parts such as nuts or washers or even screws are lost and should be replaced regularly.
- the present invention aims to provide a fastening system that allows fixing with a fixing device comprising a reduced number of rooms.
- the present invention also aims to propose a fixing system which makes it possible to reduce the overall height of the device, while providing plus the possibility of reducing the external dimensions of the primary element.
- the present invention also aims to propose a device which aims to avoid soiling of cavities.
- the primary and secondary have cooperating side surfaces of so that the secondary element can be moved along the axis of the longitudinal opening.
- the screw head includes a bearing surface in the form of washer.
- This device will provide particularly advantageous space in height reduced.
- the gain in overall height is 7 mm for M16 screws.
- the first element 1 is the primary element, which will preferably be fixed by welding on the surface of support on which the rail is placed, itself preferably flat.
- Secondary element 2 will cooperate with primary element 1.
- This secondary element 2 comprises so conventional an extension 22 intended to be superimposed on the sole or shoe 111 of the rail.
- This extension 22 includes on its lower part an elastic member 23 made of an elastomeric material that absorbs movement of the rail.
- the primary element includes classic one (or more) side surface (s) 11 which will (will) cooperate with a corresponding surface (s) side (s) of the secondary element, so that move secondary element 2 relative to element primary 1 fixed, and this so as to come into contact with the rail. The same goes for the device opposite.
- the secondary element 2 further comprises a longitudinal opening 13, the main axis of which is parallel to the angles formed by the cooperating surfaces primary and secondary elements 1 and 2.
- the element primary 1 has a circular and tapped opening 12, the standardized thread of which is produced according to the screw thread 3.
- the screw thread 3 For example, an M16 thread is proposed.
- a standardized screw 3 will then be simply inserted into the threaded opening 12 of primary element 1 while still allowing a displacement of element 2. As soon as the sole or the shoe of the rail is trapped by the secondary element 2, the screw 3 is locked in the threaded opening 12 of the element primary 1, preventing any movement of said device fixing and keeping the rail perfectly in place.
- a screw comprising a head 36 comprising a bearing surface in the form of a washer.
- the height dimensions of the different items will be reduced as much as possible.
- the overall height will be further reduced.
- the height of the head of the screw 31 is less to the overall height of a nut and a washer standards.
- the height of the washer + nut + protruding is 22 mm.
- This height is reduced to 17 mm for a screws with low nut.
- the height of these stacks is to be compared at the height of the M16 screw head which is 15 mm.
- a cap made for example of a synthetic material, on the threaded opening during handling thereof, which must be extracted just before inserting the appropriate screw. This stopper prevents dirt from filling up the tapped opening 12 of the primary element 1.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
Description
La présente invention se rapporte à un dispositif de fixation de rails tels que des rails de manutention utilisés par exemple dans les installations industrielles et destinés entre autres à supporter des engins comme une grue ou un pont roulant.The present invention relates to a rail fastening device such as rails handling used for example in installations industrial and intended inter alia to support such as a crane or an overhead crane.
Les dispositifs de fixation de rails tels que des rails de manutention sont bien connus. Ils sont de préférence disposés l'un en face de l'autre de chaque côté du patin desdits rails pour les fixer à une surface de support, de préférence plane.Rail fasteners such as handling rails are well known. They're from preferably arranged opposite one another on each side of the pad of said rails to fix them to a surface of support, preferably flat.
Selon l'état de la technique, ils se composent d'au moins trois éléments. Le premier élément est l'élément dit "primaire" qui prend appui sur la surface du support et qui y est solidement fixé, soit par boulonnage, soit par soudure. Un second élément, appelé également élément "secondaire", permet d'emprisonner le rail, et plus particulièrement la semelle ou le patin du rail, par exemple en ayant une surface latérale surplombant et venant en contact avec la semelle ou le patin du rail. Enfin, un troisième élément est prévu, qui est un moyen de fixation des premier et deuxième éléments entre eux. En général, celui-ci est constitué par une vis dont la tête est introduite dans une ouverture présente dans le premier et dans le deuxième élément et sur laquelle vient se fixer un écrou. Afin d'obtenir un assemblage correct permettant de garantir le serrage nécessaire pour une fixation parfaite du rail, il est impératif de positionner très précisément les moyens de fixation.According to the state of the art, they consist of at least three elements. The first element is the element called "primary" which rests on the surface of the support and which is securely attached to it, either by bolting, either by welding. A second element, also called "secondary" element, traps the rail, and more particularly the sole or the shoe of the rail, for example by having a side surface overhanging and coming in contact with the sole or the shoe of the rail. Finally, a third element is provided, which is a means of attachment first and second elements between them. In general, this consists of a screw whose head is introduced into an opening present in the first and in the second element and on which a nut. In order to obtain a correct assembly allowing guarantee the necessary tightening for a perfect fixing of the rail, it is imperative to position very precisely the fixing means.
Le document BE-843657 décrit un dispositif de fixation élastique qui donne un appui vertical limité qui permet un déplacement longitudinal et vertical du rail. Dans ce cas, on observe que l'ouverture prévue dans les différents éléments est orientée de manière à permettre un déplacement du moyen de fixation de façon à ce que le second élément puisse occuper diverses positions par rapport au premier élément. L'ouverture est en outre orientée dans un sens faisant un angle avec le rail. Le premier et le second éléments présentent en outre des surfaces latérales coopérantes qui se touchent dans toutes les positions relatives des deux éléments, les surfaces s'étendant de préférence parallèlement à l'axe d'ouverture desdits éléments. La difficulté principale réside dans le positionnement précis de la vis afin de bloquer et verrouiller l'ensemble du dispositif de fixation sur le rail en évitant ainsi tout déplacement de celui-ci.Document BE-843657 describes a device for elastic fixing which gives a limited vertical support which allows longitudinal and vertical movement of the rail. In this case, we observe that the opening provided in the different elements is oriented so as to allow a displacement of the fastening means so that the second element can occupy various positions by compared to the first element. The opening is further oriented in a direction at an angle to the rail. The first and second elements further have cooperating side surfaces that touch each other the relative positions of the two elements, the surfaces preferably extending parallel to the opening axis of said elements. The main difficulty lies in the precise positioning of the screw in order to block and lock the entire fastening device on the rail thus avoiding any displacement thereof.
En outre, selon la forme d'exécution décrite dans ce document, le dispositif de fixation nécessite la présence d'au moins quatre pièces, et de préférence de cinq pièces, pour la fixation du rail. Etant donné que de tels rails sont disposés sur des chantiers, et parfois dans des positions délicates, un grand nombre de pièces, en particulier les pièces de faible dimension tels que les écrous ou rondelles ou même les vis, font l'objet de perte et doivent être régulièrement remplacées.In addition, depending on the embodiment described in this document, the fixing device requires the presence of at least four pieces, and preferably five parts, for fixing the rail. Since such rails are arranged on building sites, and sometimes in delicate positions, a large number of pieces, in especially small parts such as nuts or washers or even screws are lost and should be replaced regularly.
On connaít également un autre type de fixation de rails, qui se compose essentiellement d'une plaquette ou lame qui est associée à la semelle ou au patin du rail. Le positionnement et la fixation s'effectuent à l'aide d'excentriques et de vis de blocage. A nouveau, la présence d'excentriques rend le positionnement et la fixation relativement délicats. En outre, le fait de devoir effectuer l'opération simultanément sur les deux vis rend la fixation plus complexe. Le nombre de pièces est à nouveau relativement important.We also know another type of rail fixing, which basically consists of a plate or blade which is associated with the sole or the shoe of the rail. Positioning and fixing are carried out at using eccentrics and locking screws. Again, the presence of eccentrics makes positioning and relatively delicate fixation. Furthermore, the fact of having performing the operation simultaneously on the two screws makes more complex fixation. The number of pieces is relatively new again.
La présente invention vise à proposer un système de fixation qui permet la fixation à l'aide d'un dispositif de fixation comprenant un nombre réduit de pièces.The present invention aims to provide a fastening system that allows fixing with a fixing device comprising a reduced number of rooms.
La présente invention vise également à proposer un système de fixation qui permet de réduire l'encombrement en hauteur du dispositif, tout en offrant en plus la possibilité de diminuer les dimensions extérieures de l'élément primaire.The present invention also aims to propose a fixing system which makes it possible to reduce the overall height of the device, while providing plus the possibility of reducing the external dimensions of the primary element.
A titre accessoire, la présente invention vise également à proposer un dispositif qui vise à éviter la salissure de cavités.As an accessory, the present invention also aims to propose a device which aims to avoid soiling of cavities.
La présente invention se rapporte à un dispositif destiné à la fixation de rails, et en particulier de rails de manutention disposés sur une surface de support, composé essentiellement de trois éléments:
- un élément primaire qui sera de préférence fixé par soudure ou boulonnage à la surface de support sur laquelle est disposé le rail,
- un élément secondaire qui va coopérer avec l'élément primaire de manière à emprisonner la semelle ou le patin du rail, et
- un élément de fixation constitué par au moins une vis,
caractérisé en ce que l'élément primaire présente une ouverture taraudée aux dimensions de la vis et en ce que l'élément secondaire présente une ouverture longitudinale permettant son déplacement par rapport à la pièce primaire.
- a primary element which will preferably be fixed by welding or bolting to the support surface on which the rail is arranged,
- a secondary element which will cooperate with the primary element so as to trap the sole or the shoe of the rail, and
- a fixing element consisting of at least one screw,
characterized in that the primary element has a tapped opening to the dimensions of the screw and in that the secondary element has a longitudinal opening allowing it to move relative to the primary part.
De préférence, les éléments primaire et secondaire présentent des surfaces latérales coopérantes de manière à pouvoir déplacer l'élément secondaire selon l'axe de l'ouverture longitudinale.Preferably, the primary and secondary have cooperating side surfaces of so that the secondary element can be moved along the axis of the longitudinal opening.
De manière particulièrement avantageuse, la tête de la vis comprend une surface d'appui sous forme de rondelle.Particularly advantageously, the screw head includes a bearing surface in the form of washer.
Ce dispositif permettra d'avoir de manière particulièrement avantageuse un encombrement en hauteur réduit. En particulier, le gain en encombrement en hauteur est de 7 mm pour une visserie M16.This device will provide particularly advantageous space in height reduced. In particular, the gain in overall height is 7 mm for M16 screws.
- La figure 1Figure 1
- représente une vue par le dessus de la disposition précise d'éléments de fixation selon la présente invention par rapport au rail à fixer.represents a view from above of the precise arrangement of fasteners according to the present invention with respect to rail to be fixed.
- La figure 2Figure 2
- représente une vue éclatée du dispositif de fixation selon la présente invention.represents an exploded view of the device fixing according to the present invention.
- La figure 3Figure 3
- représente une vue de profil du dispositif selon la présente invention et représenté à la figure 2 en position verrouillée.represents a profile view of the device according to the present invention and shown in Figure 2 in the locked position.
La figure 2 représente une vue éclatée des différentes pièces constituant le dispositif de fixation 101 selon la présente invention. Ce dispositif est essentiellement constitué de trois éléments:
- l'élément primaire, qui sera fixé sur le support,
- l'élément secondaire, qui va coopérer avec l'élément primaire, et
- l'élément de fixation.
- the primary element, which will be fixed on the support,
- the secondary element, which will cooperate with the primary element, and
- the fixing element.
Le premier élément 1 est l'élément primaire,
qui sera de préférence fixé par soudure sur la surface de
support sur laquelle est disposé le rail, elle-même de
préférence plane.The
L'élément secondaire 2 va coopérer avec
l'élément primaire 1.
Cet élément secondaire 2 comporte de manière
classique un prolongement 22 destiné à se superposer à la
semelle ou patin 111 du rail. Ce prolongement 22 comprend
sur sa partie inférieure un organe élastique 23 réalisé en
un matériau élastomère qui permet d'absorber les mouvements
du rail.This
L'élément primaire comporte de manière
classique une (ou des) surface(s) latérale(s) 11 qui va
(vont) coopérer avec une (des) surface(s) correspondante(s)
latérale(s) de l'élément secondaire, de manière à pouvoir
déplacer l'élément secondaire 2 par rapport à l'élément
primaire 1 fixe, et ceci de façon à venir en contact avec
le rail. Il en va de même pour le dispositif d'en face.The primary element includes
classic one (or more) side surface (s) 11 which will
(will) cooperate with a corresponding surface (s)
side (s) of the secondary element, so that
move
L'élément secondaire 2 comprend en outre une
ouverture longitudinale 13, dont l'axe principal est
parallèle aux angles que forment les surfaces coopérantes
des éléments primaire et secondaire 1 et 2. The
Selon la présente invention, l'élément
primaire 1 présente une ouverture circulaire et taraudée
12, dont le filetage normalisé est réalisé en fonction du
filetage de la vis 3. A titre d'exemple, un filetage de M16
est proposé.According to the present invention, the element
primary 1 has a circular and tapped
Une vis standardisée 3 sera ensuite
simplement introduite dans l'ouverture taraudée 12 de
l'élément primaire 1 tout en permettant encore un
déplacement de l'élément 2. Dès que la semelle ou le patin
du rail est emprisonné par l'élément secondaire 2, la vis 3
est verrouillée dans l'ouverture taraudée 12 de l'élément
primaire 1, empêchant tout déplacement dudit dispositif de
fixation et maintenant parfaitement le rail en place.A
Afin de réduire encore le nombre de pièces
destinées à réaliser ce dispositif, on peut proposer une
vis comprenant une tête 36 comportant une surface d'appui
sous forme de rondelle.To further reduce the number of pieces
intended to realize this device, one can propose a
screw comprising a
On observe de manière particulièrement
avantageuse que les dimensions en hauteur des différents
éléments seront réduites autant que possible. En
particulier, après verrouillage de la vis 3 dans l'élément
primaire 1, l'encombrement en hauteur sera encore réduit.
En effet, la hauteur de la tête de la vis 31 est inférieure
à l'encombrement hauteur d'un écrou et d'une rondelle
standards.We observe particularly
advantageous than the height dimensions of the different
items will be reduced as much as possible. In
particular, after locking the
Dans le cas d'une visserie M16, la hauteur de la rondelle + écrou + dépassant (5 mm selon la norme DIN) est de 22 mm.In the case of M16 hardware, the height of the washer + nut + protruding (5 mm according to DIN standard) is 22 mm.
Cette hauteur est réduite à 17 mm pour une visserie avec écrou bas.This height is reduced to 17 mm for a screws with low nut.
La hauteur de ces empilements est à comparer à la hauteur de la tête de vis M16 qui est de 15 mm.The height of these stacks is to be compared at the height of the M16 screw head which is 15 mm.
De manière avantageuse, on proposera de
réaliser une vis galvanisée, ce qui permettra d'augmenter
la protection contre la corrosion alors que la pièce
primaire est réalisée en une matière non galvanisée. Le
fait de proposer la galvanisation uniquement sur la vis 3
suffira à assurer la protection des deux.Advantageously, we will propose
make a galvanized screw, which will increase
corrosion protection while the part
primer is made of non-galvanized material. The
offer to galvanize only on
En outre, selon une forme d'exécution encore
particulière, on peut proposer de disposer d'un bouchon,
réalisé par exemple en une matière synthétique, sur
l'ouverture taraudée pendant la manipulation de celui-ci,
que l'on extraira juste avant d'introduire la vis adéquate.
Ce bouchon permet d'éviter que des saletés ne remplissent
l'ouverture taraudée 12 de l'élément primaire 1.In addition, according to one embodiment still
particular, we can propose to have a cap,
made for example of a synthetic material, on
the threaded opening during handling thereof,
which must be extracted just before inserting the appropriate screw.
This stopper prevents dirt from filling up
the tapped
De manière particulièrement avantageuse, on observe qu'en réduisant le nombre de pièces à disposer pour la fixation d'un rail, on augmente la facilité du montage.Particularly advantageously, we observes that by reducing the number of rooms to have for fixing a rail increases the ease of assembly.
Selon un autre avantage particulièrement
important de la présente invention, il n'est plus
nécessaire de disposer précisément des pièces, le
verrouillage étant assuré dans tous les cas de figure à
condition que la vis 3 soit introduite dans l'ouverture
taraudée 12 de l'élément primaire 1.According to another advantage particularly
important of the present invention it is no longer
necessary to have precise parts, the
locking being ensured in all cases of
provided that
Claims (4)
caractérisé en ce que l'élément primaire (1) présente une ouverture (12) taraudée aux dimensions de la vis et en ce que l'élément secondaire (2) présente une ouverture longitudinale (13) permettant son déplacement par rapport à la pièce primaire (1).
characterized in that the primary element (1) has an opening (12) threaded to the dimensions of the screw and in that the secondary element (2) has a longitudinal opening (13) allowing it to move relative to the primary part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98870276A EP1013827A1 (en) | 1998-12-23 | 1998-12-23 | Rail fastenings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98870276A EP1013827A1 (en) | 1998-12-23 | 1998-12-23 | Rail fastenings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1013827A1 true EP1013827A1 (en) | 2000-06-28 |
Family
ID=8237139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98870276A Withdrawn EP1013827A1 (en) | 1998-12-23 | 1998-12-23 | Rail fastenings |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1013827A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10157676A1 (en) * | 2001-11-24 | 2003-06-26 | Vossloh Werke Gmbh | Device for the lateral support of a rail |
| WO2009103349A1 (en) * | 2008-02-22 | 2009-08-27 | Vossloh-Werke Gmbh | System for fastening a rail on a base |
| US10132044B2 (en) * | 2014-04-28 | 2018-11-20 | Hf Holding S.A. | Rail clip assembly |
| WO2019097093A1 (en) | 2017-11-15 | 2019-05-23 | Pandrol Iberica S.A.U. | System for attaching and aligning a runner of a rail |
| EP3674482A1 (en) | 2018-12-28 | 2020-07-01 | Claudiu Orodel | Device for attaching a rail |
| CN114375357A (en) * | 2019-08-23 | 2022-04-19 | 干焠轨道公司 | Rail fastening device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE843657A (en) | 1975-06-30 | 1976-10-18 | IMPROVEMENTS TO RAIL FIXING DEVICES | |
| NL7803955A (en) * | 1977-04-19 | 1978-10-23 | Kins Developments Ltd | RAIL CLAMP DEVICE. |
| EP0272874A1 (en) * | 1986-12-17 | 1988-06-29 | GH International Ltd | Rail clip assembly |
| WO1997029240A1 (en) * | 1996-02-07 | 1997-08-14 | Gantry S.A. | Rail attachment device |
-
1998
- 1998-12-23 EP EP98870276A patent/EP1013827A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE843657A (en) | 1975-06-30 | 1976-10-18 | IMPROVEMENTS TO RAIL FIXING DEVICES | |
| NL7803955A (en) * | 1977-04-19 | 1978-10-23 | Kins Developments Ltd | RAIL CLAMP DEVICE. |
| EP0272874A1 (en) * | 1986-12-17 | 1988-06-29 | GH International Ltd | Rail clip assembly |
| WO1997029240A1 (en) * | 1996-02-07 | 1997-08-14 | Gantry S.A. | Rail attachment device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10157676A1 (en) * | 2001-11-24 | 2003-06-26 | Vossloh Werke Gmbh | Device for the lateral support of a rail |
| WO2009103349A1 (en) * | 2008-02-22 | 2009-08-27 | Vossloh-Werke Gmbh | System for fastening a rail on a base |
| EA015602B1 (en) * | 2008-02-22 | 2011-10-31 | Фоссло-Верке Гмбх | System for fastening a rail on a base |
| CN101952513B (en) * | 2008-02-22 | 2013-03-20 | 沃斯洛工厂有限公司 | System for fastening a rail on a base |
| US9103073B2 (en) | 2008-02-22 | 2015-08-11 | Vossloh-Werke Gmbh | System for fastening a rail, and fastening of a rail on a substrate |
| US10132044B2 (en) * | 2014-04-28 | 2018-11-20 | Hf Holding S.A. | Rail clip assembly |
| WO2019097093A1 (en) | 2017-11-15 | 2019-05-23 | Pandrol Iberica S.A.U. | System for attaching and aligning a runner of a rail |
| EP3674482A1 (en) | 2018-12-28 | 2020-07-01 | Claudiu Orodel | Device for attaching a rail |
| FR3091302A1 (en) * | 2018-12-28 | 2020-07-03 | Claudiu Orodel | Rail fixing device |
| CN114375357A (en) * | 2019-08-23 | 2022-04-19 | 干焠轨道公司 | Rail fastening device |
| CN114375357B (en) * | 2019-08-23 | 2023-12-08 | 干焠轨道公司 | Rail fastening device |
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