WO2021206770A1

WO2021206770A1 - Guide rail system

Info

Publication number: WO2021206770A1
Application number: PCT/US2020/067239
Authority: WO
Inventors: Maosheng Liu; Puliang Tang; Zhaohui Liu; Ruixin SU
Original assignee: Commscope Technologies Llc
Priority date: 2020-04-07
Filing date: 2020-12-29
Publication date: 2021-10-14
Also published as: CN113494526A

Abstract

The invention relates to a guide rail system, which comprises a first guide rail (1) and a second guide rail (2), wherein each guide rail extends elongatedly, and the second guide rail can be pushed in and pulled out relative to the first guide rail in a longitudinal direction. Each guide rail has an elongated guide arm (11, 21) extending in the longitudinal direction. The guide arm of each guide rail can protrude into a space bounded by the guide arm of the respective other guide rail. The second guide rail can be supported on the first guide rail by the guide arms and can be pushed in the longitudinal direction relative to the first guide rail by the guide arms. The guide rail system is simple in structure and easy to manufacture and install.

Description

Guide Rail System

Related Application

[0001] The present application claims priority from and the benefit of Chinese Patent Application No. 202010263237.4, filed April 7, 2020, the disclosure of which is hereby incorporated herein in its entirety.

Technical field

[0002] The disclosure relates to a guide rail system. For example, such a guide rail system may be used to mount heavy objects such as an electronic or electrical communication equipment on a base component such as a base station antenna or tower.

Background art

[0003] Guide rail systems are generally known and may support, fix, and guide movable objects. Guide rail systems are widely used in furniture equipment such as drawer devices.

[0004] In the field of communication technology, some electrical or electronic devices are to be installed on a foundation such as a house or a tower, or within a radome of a base station antenna. These electrical or electronic devices may have significant weight, and thus their installation and disassembly may be complicated and dangerous.

Summary of Invention

[0005] An object of the disclosure is to provide a guide rail system which is simple in structure and easy to install.

[0006] For this purpose, a guide rail system is proposed, which comprises a first guide rail and a second guide rail, each guide rail extending elongatedly, wherein the second guide rail can be pushed in and pulled out with respect to the first guide rail in a longitudinal direction, wherein each guide rail has an elongated guide arm extending in the longitudinal direction, wherein the guide arm of each guide rail can protrude into a space bounded by the guide arm of the respective other guide rail, and the second guide rail can be supported on the first guide rail by means of the guide arms and can be guided in the longitudinal direction with respect to the first guide rail by means of the guide arms.

[0007] In this guide rail system, the two rails can be held together reliably. This fact may be advantageous especially when the second guide rail together with a load such as electronic or electrical equipment with a weight up to 15 kg is assembled to and disassembled from the first guide rail.

[0008] In some embodiments, a rotatable roller may be provided in the space of each guide rail, and the roller of this guide rail and the guide arm of the respective other guide rail support each other. In other words, the roller in the space of the first guide rail and the second guide arm may support each other, and the roller in the space of the second guide rail and the first guide arm may support each other.

[0009] In some embodiments, the guide arm of each guide rail may have a first recess for receiving the roller of the respective other guide rail when the second guide rail is pushed into a predetermined position in the first guide rail. In other words, the guide arm of the first guide rail may have a first recess for the roller of the second guide rail, and the guide arm of the second guide rail may have a first recess for the roller of the first guide rail. Therefore, when the second guide rail is pushed into a predetermined position in the first guide rail, the second guide rail can sink relative to the first guide rail in a height direction of the guide rail system, so that the predetermined position of the second guide rail relative to the first guide rail can be clearly perceived, and the pre-fixing of the second guide rail relative to the first guide rail can be realized, which may be beneficial to avoiding the risk that the second guide rail unintentionally falls off during installation and disassembly, and may simplify the final fixing of the second guide rail relative to the first guide rail.

[00010] In some embodiments, a metal pin may be provided in the space of each guide rail, and the metal pin of this guide rail may be configured to support each other with the guide arm of the respective other guide rail when the roller of this guide rail is received in the first recess of the guide arm of the respective other guide rail. When the second guide rail is pushed into a predetermined position in the first guide rail, the metal pins can bear a load so that the roller is unloaded. In some embodiments, the roller may be made of plastic at least primarily. Unloading the roller may be beneficial to the life of the roller. In some embodiments, the metal pin may be a cotter pin that can be simply installed. The metal pin may have a smooth surface.

[00011] In some embodiments, the guide arm of each guide rail may have a second recess for receiving the metal pin of the respective other guide rail when the second guide rail is pushed into a predetermined position in the first guide rail. This may be beneficial to the pre-fixing of the second guide rail relative to the first guide rail.

[00012] In some embodiments, the rollers may be respectively provided in two end regions of each guide rail as viewed in the longitudinal direction. [00013] In some embodiments, the metal pins may be respectively provided in two end regions of each guide rail as viewed in the longitudinal direction.

[00014] In some embodiments, the rollers of each guide rail may be inside and the metal pins of each guide rail may be outside as viewed in the longitudinal direction.

[00015] In some embodiments, the positions of the metal pins and the rollers of the guide rail system in the longitudinal direction may be configured such that at least one of the metal pins and the rollers may be held on the free edge of the corresponding guide arm during the pushing of the second guide rail into the first guide rail, until the metal pins and the rollers can enter the corresponding recesses at a predetermined final position. Therefore, the pushing and pulling process of the second guide rail with respect to the first guide rail can be always smooth.

[00016] In some embodiments, at least one of the rollers may have an annular groove that receives and restricts the movement of the corresponding guide arm in a thickness direction of the guide rail system. It may be advantageous that each roller may have the annular groove.

[00017] In some embodiments, the space of each guide rail may be configured as a groove extending in the longitudinal direction, the guide arm of this guide rail may constitute a groove sidewall of this groove, and the guide arm of the respective other guide rail may protrude into this groove from a groove opening of this groove extending in the longitudinal direction.

[00018] In some embodiments, each guide rail may be configured as a plate-like element.

[00019] In some embodiments, the plate-like element may be made of a multi-cavity metal profile.

[00020] In some embodiments, the first guide rail and the second guide rail may have sliding surfaces facing each other, and the sliding surfaces facing each other can slide each other when the second guide rail is pushed in and pulled out in the longitudinal direction with respect to the first guide rail.

[00021] In some embodiments, the sliding surfaces may be respectively provided on both sides of each guide rail, as viewed in a height direction of the guide rail system. [00022] In some embodiments, the sliding surfaces of each guide rail may be in a common plane from which the guide arm of this guide rail protrudes.

[00023] In some embodiments, the guide arm of each guide rail may include a first portion extending laterally from the common plane of this guide rail and a second portion bent relative to the first portion and parallel to the common plane of this guide rail. [00024] In some embodiments, the first guide rail and the second guide rail may have substantially the same cross-section, and in the installed state, the cross-section of the second guide rail is inverted 180 degree relative to the cross-section of the first guide rail. [00025] In some embodiments, the first guide rail and the second guide rail may be constructed substantially identically. This can be beneficial to the manufacture and storage of the guide rail system. Therefore, only one kind of guide rail needs to be manufactured and stored. During installation, one of the two same guide rails can be used as the first guide rail, and the other of the two same guide rails can be used as the second guide rail.

[00026] In some embodiments, the first guide rail and the second guide rail may have at least one pair of fixing holes that can be aligned with each other in the installed state of the guide rail system and are configured to receive fixing elements to finally fix the second guide rail in a predetermined position with respect to the first guide rail. The fixing element may be, for example, a bolt or any other fastening element, whereby the final fixing of the second guide rail with respect to the first guide rail can be achieved.

[00027] In some embodiments, the guide rail system may be configured as a mounting device, wherein the first guide rail may be configured to be fixed to a base component, such as a radome of a base station antenna, and the second guide rail may be configured to be attached with a weight, such as an electrical or electronic device to be connected to the base station antenna.

[00028] The above-mentioned technical features and the technical features to be mentioned below and the technical features from the drawings can be arbitrarily combined with each other, as long as the individual technical features to be combined with each other are not mutually contradictory.

Brief description of drawings

[00029] A guide rail system according to an embodiment of the present invention will now be described with reference to the schematic drawings, in which:

[00030] Fig. 1 is an exploded view of a guide rail system according to an embodiment of the present invention;

[00031] Fig. 2 is a cross-sectional view of the guide rail system of Fig. 1 during pushing the second guide rail into the first guide rail;

[00032] Fig. 3 is a cross-sectional view of the guide rail system of Fig. 1 at the end of pushing the second guide rail into the first guide rail; and

[00033] Figs. 4a to 4h are schematic figures illustrating the process of pushing the second guide rail into the first guide rail of the guide rail system of Fig. 1 . Embodiments

[00034] Fig. 1 is an exploded view of a guide rail system according to an embodiment of the present invention, wherein a first guide rail 1 and a second guide rail 2 of the guide rail system are illustrated transparently so that details that are not visible can be illustrated more clearly. Fig. 2 is a cross-sectional view of the guide rail system of Fig. 1 during pushing the second guide rail into the first guide rail, and Fig. 3 is a cross-sectional view of the guide rail system of Fig. 1 at the end of pushing the second guide rail into the first guide rail. The second guide rail 2 sinks in Fig. 3 as compared to Fig. 2.

[00035] The first guide rail 1 and the second guide rail 2 of the guide rail system extend elongatedly, and the second guide rail can be pushed in and pulled out in a longitudinal direction X relative to the first guide rail. The first guide rail 1 and the second guide rail 2 may be made of metal profiles; for example, they may be made of multi-cavity profiles and thus may have a weight advantage. The first guide rail 1 and the second guide rail 2 may be constructed substantially identically, which may be particularly advantageous in terms of manufacturing and storage of the guide rail system. As can be seen from Figs. 2 and 3, the first guide rail and the second guide rail may have substantially the same cross-sectional shape and are inverted 180 degree with respect to each other.

[00036] The first guide rail 1 and the second guide rail 2 may be formed as plate-like elements, and thus the guide rail system may be flat, which makes the guide rail system very compact. The first guide rail 1 and the second guide rail 2 may be arranged side by side in a thickness direction Z perpendicular to the longitudinal direction X and a height direction Y that are perpendicular to each other.

[00037] The first guide rail 1 has an elongated guide arm 11 extending in the longitudinal direction X, which delimits a space 16 of the first guide rail 1 at a side facing the second guide rail in the thickness direction Z. The second guide rail 2 has an elongated guide arm 21 extending in the longitudinal direction X, which delimits a space 26 of the second guide rail 2 at a side facing the first guide rail in the thickness direction Z. The guide arm 11 of the first guide rail 1 protrudes into the space 26 of the second guide rail 2, and the guide arm 21 of the second guide rail 2 protrudes into the space 16 of the first guide rail 1. It can be said that the first guide rail and the second guide rail “shake hands” with each other. The second guide rail 2 can be supported on the first guide rail 1 by means of the guide arms 11 , 21 and can be guided in the longitudinal direction X with respect to the first guide rail 1 by means of the guide arms 11 , 21 . Each of the spaces 16, 26 may be configured as a groove extending in the longitudinal direction X and having a groove opening extending in the longitudinal direction X.

[00038] As viewed in the cross-section of the guide rail system, the profiles of the guide arms can be flexibly designed. The first guide arm 11 may point upward and the second guide arm 21 may point downward. In the embodiment shown in Figs. 2 and 3, the guide arm of each guide rail may include a first portion 11a, 21a extending laterally from this guide rail and a second portion 11 b, 21 b bent relative to the first portion. The first portions 11a, 21a may extend in the thickness direction Z of the guide rail system. The second portions 11 b, 21b may extend in the height direction Y of the guide rail system.

[00039] A rotatable roller 12 may be provided in the space 16 of the first guide rail 1 , which roller may support each other with the guide arm 21 of the second guide rail 2. Low friction rolling support can be realized by means of the roller 12. If the roller 12 is spared, the guide arm 21 may be directly supported on the bottom of the space 16 of the first guide rail 1. In the longitudinal direction X, a metal pin 13 may be additionally provided beside the roller 12. The roller 12 may have an annular groove which can receive and restrict the movement of the guide arm 21 in the thickness direction Z of the guide rail system.

[00040] A rotatable roller 22 may be provided in the space 26 of the second guide rail 2 and may support each other with the guide arm 11 of the first guide rail 1. Low friction rolling support can be realized by means of the rollers 22. If the roller 22 is spared, the guide arm 11 may also be directly supported on the top of the space 26 of the second guide rail 2. In the longitudinal direction X, a metal pin 23 may be additionally provided beside the roller 22. The roller 22 may have an annular groove which can receive and restrict the movement of the guide arm 11 in the thickness direction Z of the guide rail system.

[00041] The guide arm 11 of the first guide rail 1 may have a first recess 14 for the roller 22 of the second guide rail 2. The guide arm 21 of the second guide rail 2 may have a first recess 24 for the roller 12 of the first guide rail 1 . When the second guide rail 2 is pushed into a predetermined position in the first guide rail 1 , the first recess 24 of the second guide rail 2 reaches the roller 12 of the first guide rail 1 , and at the same time the roller 22 of the second guide rail 2 reaches the first recess 14 of the first guide rail 1 , so that the second guide rail 2 can sink in the height direction Y with respect to the first guide rail 1 . This can realize the pre-fixing of the second guide rail with respect to the first guide rail, and then the second guide rail can be finally fixed with respect to the first guide rail. For example, the first guide rail and the second guide rail may have pairs of fixing holes 19, 29 that can be aligned with each other in the installed state of the guide rail system and are configured to receive fixing elements to finally fix the second guide rail with respect to the first guide rail. The pre- fixing is beneficial in both mounting and dismounting, can prevent the second guide rail from accidentally falling from the first guide rail and the risk caused thereby, and can simplify the final fixing.

[00042] In addition, the first guide rail 1 may have a plurality of mounting holes 18 by which the first guide rail 1 may be fixed to a foundation. The second guide rail 2 may also have a plurality of mounting holes 28 so that the second guide rail 2 can be converted into a first guide rail under the condition of turning 180 degrees. It will be understood that the mounting holes 28 may be the same as or different from the mounting holes 18, and the mounting holes 28 may also be omitted.

[00043] In the state shown in Fig. 2, the rollers 12, 22 are located outside the corresponding first recesses 14, 24 and rest on the free edge of the corresponding guide arms, and the first guide rail and the second guide rail are slightly offset in the height direction Y. In the state shown in Fig. 3, the rollers 12, 22 are located in the corresponding first recesses 14, 24, wherein the second guide rail 2 is lowered in Fig. 3 as compared to Fig. 2, and the first guide rail and the second guide rail are aligned in the height direction Y. [00044] As shown in Fig. 1 , the first guide rail 1 may have a second recess 15 for receiving the metal pin 23 of the second guide rail 2 when the second guide rail is pushed into the predetermined position in the first guide rail. The second guide rail 2 may have a second recess 25 for receiving the metal pin 13 of the first guide rail 2 when the second guide rail is pushed into the predetermined position in the first guide rail. When the second guide rail 2 is pushed into the predetermined position in the first guide rail 1 , the second recess 25 of the second guide rail 2 reaches the metal pin 13 of the first guide rail 1 , and at the same time the metal pin 23 of the second guide rail 2 reaches the second recess 15 of the first guide rail 1 , so that the load of the second guide rail can be transferred to the first guide rail 1 by means of the metal pins 13, 23, and thus the rollers 12, 22 can be unloaded. This is beneficial for the long performance of the rollers, if the rollers 12, 22 are made of plastic.

[00045] As shown in Fig. 1 , rollers 12 and 22 and metal pins 13 and 23 are respectively provided in two end regions of the guide rails as viewed in the longitudinal direction X. The number of the rollers and the metal pins is exemplary. In principle, it is also possible that the number of any one of the rollers 12, 22 and the metal pins 13, 23 is 1 , 3 or more.

[00046] The first guide rail 1 and the second guide rail 2 may have sliding surfaces 17, 27 facing each other, which can slide each other when the second guide rail is pushed in and pulled out in the longitudinal direction X with respect to the first guide rail. As shown in Figs. 2 and 3, as viewed in the height direction Y of the guide rail system, the sliding surfaces may be respectively provided on two sides of each guide rail. The sliding surfaces of each guide rail may be in a common plane.

[00047] Figs. 4A to 4H are schematic figures illustrating the process of pushing the second guide rail into the first guide rail of the guide rail system of Fig. 1. Thee guide rails are illustrated transparently, wherein one of the end regions of the first guide rail 1 (corresponding to the end region on the right side of the first guide rail 1 of Fig. 1 ) and one of the end regions of the second guide rail 2 (corresponding to the end region on the left side of the second guide rail 2 of Fig. 1 ) are illustrated in the form of cutouts in Figs. 4A to 4F.

[00048] First, as shown in Fig. 4A, in the longitudinal direction X of the guide rail system, the second guide rail 2 approaches the end region of the first guide rail 1 with its end region. Then, as shown in Fig. 4B, the second guide rail 2 is moved toward the first guide rail 1 so that the metal pin 23 and the roller 22 of the second guide rail 2 sequentially reach the guide arm 11 of the first guide rail 1. Then, the second guide rail 2 is moved further toward the first guide rail 1 so that the guide arm 21 of the second guide rail 2 also reaches the metal pin 13 and the roller 12 of the first guide rail 1 in sequence, as shown in Figs. 4C to 4E. Then, the second guide rail 2 is further moved toward the first guide rail 1 so that the roller 22 of the second guide rail 2 passes over the first recess 14 of the first guide rail 1. Next, the second guide rail 2 is further moved toward the first guide rail 1 until the second guide rail 2 is pushed into a predetermined final position with respect to the first guide rail. As shown in Fig. 4G, the second guide rail 2 is about to reach the final position. As shown in Fig. 4H, the second guide rail 2 has reached the final position but has not yet descended in the height direction Y of the guide rail system. In the descended condition, the rollers 12, 22 and the metal pins 13, 23 are received in the corresponding recesses, and the pairs of fixing holes 19, 29 are aligned with each other. It is possible that by appropriately designing the positions of the metal pins 13, 23 and the rollers 12, 22 in the longitudinal direction X, at least one of the metal pins and the rollers is always held on the free edge of the corresponding guide arm during pushing the second guide rail 2 into the first guide rail 1 , so that the second guide rail can be smoothly pushed into the first guide rail. When the predetermined final position is reached, the metal pins and the rollers can enter the corresponding recesses at the same time, thus the second guide rail descends in the height direction Y relative to the first guide rail. The second guide rail 2 can then be finally fixed relative to the first guide rail 1 by fixing elements inserted into the pairs of aligned fixing holes 19, 29.

[00049] The disassembly process of the installed guide rail system can be reversed. First, the fixing elements are loosened. Then, the second guide rail is pulled so that the rollers and the metal pins leave from the corresponding recesses, and thus the second guide rail rises in the height direction Y relative to the first guide rail. Then, the second guide rail is pulled continuously, until the second guide rail completely leaves from the first guide rail in the pull-push direction X.

[00050] Kinematic inversion of the rollers and metal pins and recesses is also possible. For example, it is possible that the guide arm 21 of the second guide rail 2 is provided with a roller and a metal pin, while the bottom of the space 16 of the first guide rail 1 is provided with a first recess for this roller and a second recess for this metal pin.

[00051] It will be understood that, the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprise" and "include" (and variants thereof), when used in this specification, specify the presence of stated operations, elements, and/or components, but do not preclude the presence or addition of one or more other operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Like reference numbers signify like elements throughout the description of the figures.

[00052] The thicknesses of elements in the drawings may be exaggerated for the sake of clarity. Further, it will be understood that when an element is referred to as being "on," "coupled to" or "connected to" another element, the element may be formed directly on, coupled to or connected to the other element, or there may be one or more intervening elements therebetween. In contrast, terms such as "directly on," "directly coupled to" and "directly connected to," when used herein, indicate that no intervening elements are present. Other words used to describe the relationship between elements should be interpreted in a like fashion (i.e. , "between" versus "directly between", "attached" versus "directly attached," "adjacent" versus "directly adjacent", etc.).

[00053] Terms such as "top," "bottom," "upper," "lower," "above," "below," and the like are used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the figures. It will be understood that these terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. [00054] It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

Thus, a first element could be termed a second element without departing from the teachings of the inventive concept.

[00055] It will also be appreciated that all example embodiments disclosed herein can be combined in any way.

[00056] Finally, it is to be noted that, the above-described embodiments are merely for understanding the present invention but not constitute a limit on the protection scope of the present invention. For those skilled in the art, modifications may be made on the basis of the above-described embodiments, and these modifications do not depart from the protection scope of the present invention.

Claims

WHAT IS CLAIMED IS:

1. A guide rail system comprising a first guide rail (1 ) and a second guide rail (2), each guide rail extending elongatedly, wherein the second guide rail can be pushed in and pulled out with respect to the first guide rail in a longitudinal direction (X), characterized in that each guide rail has an elongated guide arm (11 , 21 ) extending in the longitudinal direction, wherein the guide arm of each guide rail can protrude into a space (16, 26) of the respective other guide rail bounded by the guide arm of the respective other guide rail, wherein the second guide rail (2) can be supported on the first guide rail (1) by the guide arms (11 , 21 ) and can be guided in the longitudinal direction (X) relative to the first guide rail (1) by the guide arms (11 , 21 ).

2. The guide rail system according to claim 1 , characterized in that a rotatable roller (12, 22) is provided in the space (16, 26) of each guide rail, and the roller of this guide rail and the guide arm of the respective other guide rail are mutually supported.

3. The guide rail system according to claim 2, characterized in that the guide arm (11 , 21 ) of each guide rail has a first recess (14, 24) for receiving the roller of the respective other guide rail when the second guide rail is pushed into a predetermined position in the first guide rail.

4. The guide rail system according to claim 3, characterized in that a metal pin (13, 23) is provided in the space (16, 26) of each guide rail, and the metal pin of this guide rail is configured to support each other with the guide arm of the respective other guide rail when the roller of this guide rail is received in the first recesses of the guide arm of the respective other guide rail.

5. The guide rail system according to claim 4, characterized in that the guide arm (11 ,

21 ) of each guide rail has a second recess (15, 25) for receiving the metal pin of the respective other guide rail when the second guide rail is pushed into the predetermined position in the first guide rail.

6. The guide rail system according to any one of claims 2 to 5, characterized in that the rollers (12, 22) are respectively arranged in two end regions of each guide rail, as viewed in the longitudinal direction (X).

7. The guide rail system according to claim 4 or 5, characterized in that the rollers (12,

22) and the metal pins (13, 23) are respectively arranged in two end regions of each guide rail, as viewed in the longitudinal direction (X), wherein the rollers of each guide rail is located inside and the metal pins of each guide rail is located outside.

8. The guide rail system according to claim 4 or 5, characterized in that the positions of the metal pins and the rollers of the guide rail system in the longitudinal direction are configured such that at least one of the metal pins and the rollers is held on the free edge of the corresponding guide arm during pushing the second guide rail into the first guide rail, until the metal pins (13, 23) and the rollers (12, 22) enter the corresponding recesses in the predetermined final position.

9. The guide rail system according to any one of claims 2 to 5, characterized in that at least one of the rollers has an annular groove that receives and restricts the movement of the corresponding guide arm in a thickness direction (Z) of the guide rail system.

10. The guide rail system according to any one of claims 1 to 5, characterized in that the space (16, 26) of each guide rail is formed as a groove extending in the longitudinal direction (X), and the guide arm of this guide rail forms a groove side wall of this groove, and the guide arm of the respective other guide rail protrudes into this groove from a groove opening of this groove, which groove opening extends in the longitudinal direction (X).

11. The guide rail system according to any one of claims 1 to 5, characterized in that each guide rail is formed as a plate-like element.

12. The guide rail system according to claim 11 , characterized in that the plate-like element is made of a multi-cavity metal profile.

13. The guide rail system according to any one of claims 1 to 5, characterized in that the first guide rail and the second guide rail have sliding surfaces (17, 27) facing each other, and the sliding surfaces facing each other can slide with each other when the second guide rail is pushed in and pulled out with respect to the first guide rail in the longitudinal direction (X).

14. The guide rail system according to claim 13, characterized in that the sliding surfaces are respectively provided on two sides of each guide rail, as viewed in a height direction (Y) of the guide rail system.

15. The guide rail system according to claim 14, characterized in that the sliding surfaces of each guide rail are in a common plane, and the guide arm of this guide rail protrudes from the common plane.

16. The guide rail system according to claim 15, characterized in that the guide arm of each guide rail comprises a first portion (11a, 21a) extending transversely from the common plane of this guide rail and a second portion (11 b, 21 b) bent relative to the first portion and parallel to the common plane of this guide rail.

17. The guide rail system according to any one of claims 1 to 5, characterized in that the first guide rail and the second guide rail have the same cross-section, and in the installed state, the cross-section of the second guide rail is turned 180 degree with respect to the cross-section of the first guide rail.

18. The guide rail system according to claim 17, characterized in that the first guide rail and the second guide rail are configured identically.

19. The guide rail system according to any one of claims 1 to 5, characterized in that the first guide rail and the second guide rail have at least one pair of fixing holes (19, 29) which can be aligned with each other in the installed state of the guide rail system and are configured to receive a fixing element to fix the second guide rail relative to the first guide rail.

20. The guide rail system according to any one of claims 1 to 5, characterized in that the guide rail system is configured as a mounting device, wherein the first guide rail is configured to be fixed on a foundation and the second guide rail is configured to be attached with a weight.