Lifting drive for rail-guided cantilever device

Abstract

The invention relates to a lifting drive for a rail-guided boom device (2), in particular for bridge construction, in which the boom device (2) comprises a main frame (3, 3 ') guided by at least one rail (4a, 4b, 4'a, 4' b) for accommodating at least one formwork, with a lifting device (5, 5 '), in which a first end of the lifting device (5, 5') is designed to be connected to the main frame (3, 3 ') and a second end of the lifting device (5, 5') is designed to be connected to the main frame (3, 3 '). The at least one rail (4a, 4b, 4'a, 4 'b) is arranged on the main frame (3, 3'), and when a first end of the lifting device (5, 5 ') is connected to the main frame (3, 3'), a second end of the lifting device (5, 5 ') opposite the first end is movable relative to the main frame (3, 3'), having a first fastening device (6) which is connected to the first end of the lifting device (5, 5 ') and which is designed to fasten the first end of the lifting device (5, 5') relative to the at least one rail (4a, 4b, 4'a, 4'b), and having a second fastening device (7) which is designed to fasten the first end of the lifting device (5, 5 ') relative to the at least one rail (4a, 4b, 4'a and at least one fastening device (6, 7) which is connected to the second end of the lifting device (5, 5 ') and which is designed to fasten the second end of the lifting device (5, 5') relative to the at least one rail (4a, 4b, 4'a, 4 'b), the first and second fastening devices (6, 7) each being able to be fastened in a reversibly separable manner relative to the at least one rail (4a, 4b, 4'a, 4' b).

Description

[0001] This application is a divisional application of a patent application with application number 2020800159793, application date February 18, 2020, and invention name “Lifting drive for a rail-guided cantilever device”.

[0002] The invention relates to a lifting drive for a rail-guided cantilever device, in particular for bridge construction, wherein the cantilever device comprises a main frame guided by at least one rail for accommodating at least one formwork. The invention also relates to a rail-guided cantilever device, comprising a lifting drive according to any of the preceding claims, and to a method for moving a rail-guided cantilever device, in particular for bridge construction, using the lifting drive.

[0003] A previously known lifting drive with a hydraulic cylinder is described in the German patent application publication DE 10 2007 047 443 A1, which relates to a formwork device for cantilever erection of bridges. Cantilever devices are used, for example, in the construction of bridges. Cantilever devices are usually moved on rails, for example from a bridge pier that has already been concreted, in order to subsequently continue to concrete the bridge. If there is even a slight slope or inclination of the bridge, the cantilever device can move on its own in an uncontrolled manner, and in the worst case, fall. When building a bridge, if the bridge inclination exceeds 2°, so that the cantilever device can move on its own on the rails, uncontrolled movements of the cantilever device that cause the risk of the cantilever device falling completely must be avoided.

[0004] Up to now, uncontrolled movement of the cantilever device has been prevented by self-locking of the cantilever device movement due to a given friction coefficient of a roller bearing or rolling bearing, by which the cantilever device is guided on a corresponding track until a permissible longitudinal inclination of the bridge of less than 2° is reached. The friction coefficient can be increased by adding a wooden wedge between the guide rail and the roller of the roller bearing. Uncontrolled movement of the cantilever device can also be prevented by using a sliding bearing with a defined high friction coefficient instead of a roller bearing. In the above-mentioned DE 102007 047 443A1, the solution is in the form of a substantially horizontal sliding bearing, which has at least one bearing part made of plastic. The use of sliding bearings is considered to be superior to the roller bearings used so far, because when using roller bearings, there is already a risk that the rollers will leave the track provided for them and, for example, hit a flange or the like in the case of a small bridge radius (paragraph

[0007] , lines 1-10).

[0005] However, the disadvantage of the plain bearing solution is that the coefficient of sliding friction depends on the factors that influence the friction. If ice, oil, dirt and / or water are present at the contact points of the plain bearing components sliding against each other, the friction is reduced to such an extent that the required braking effect can no longer be ensured. The components sliding against each other are subject to higher wear than roller bearings or rolling bearings. In addition, for plain bearings with a specifically increased friction compared to roller bearings or rolling bearings, greater forces are required to move the boom device than for roller bearings or rolling bearings, which, for example, requires the use of more powerful, i.e. usually larger, hydraulic devices / cylinders. The inclination of the plain bearing is also limited if the downhill forces of the boom device are greater than the friction forces caused by the plain bearings. On the other hand, roller bearings or rolling bearings can only be used for small inclinations, and when wooden blocks are fed in and / or removed by hand to increase or reduce the friction of the bearings, the operator is in the danger zone of the boom device, i.e. in the worst case, he can be caught by the device. The disadvantages of both solutions apply both to the forward movement of the boom device towards the construction section to be poured with concrete and to the backward movement.

[0006] Accordingly, the object of the present invention is to provide a lifting drive for a rail-guided boom arrangement, which enables the boom arrangement to be moved safely with low friction and without the risk of uncontrolled movement of the boom arrangement, in particular when the structure is inclined by more than 2°. Furthermore, the object of the present invention is to provide a simple and compact lifting drive, by means of which the boom arrangement can be moved safely both in forward and backward movement, so that no modification of the lifting drive or the boom arrangement is required and no personnel are required to be in the direct danger area of ​​the lifting drive or the boom arrangement.

[0007] The solution for achieving the above-mentioned object according to the invention is a lifting drive having the features of claim 1 and a method for moving a rail-guided boom arrangement having the features of claim 16. Advantageous further developments are described in the dependent claims.

[0008] Therefore, the object of the present invention is achieved by a lifting drive for a rail-guided cantilever device, in particular for bridge construction, wherein the cantilever device includes a main frame guided by at least one rail for accommodating at least one template, has a lifting device, wherein the first end of the lifting device is designed to be connected to the main frame, and when the first end of the lifting device is connected to the main frame, the second end of the lifting device opposite to the first end is movable relative to the main frame, has a first fixing device, which is connected to the first end of the lifting device and is designed to fix the first end of the lifting device relative to the at least one rail, and has a second fixing device, which is connected to the second end of the lifting device and is designed to fix the second end of the lifting device relative to the at least one rail, wherein both the first and second fixing devices can be fixed relative to the at least one rail in a reversibly separable manner.

[0009] The first end of the lifting device is designed to be connected to the main frame directly or indirectly, for example, through a first fixing device. That is, when the main frame is connected to the first fixing device and the first fixing device is connected to the first end of the lifting device, the first end of the lifting device is designed to be indirectly connected to the main frame or indirectly fixed to the main frame. The first fixing device can be directly connected to the first end of the lifting device or to the main frame, as long as the main frame is connected to the first end of the lifting device. There can also be more or other components between the first fixing device and the first end of the lifting device, as long as the first fixing device is connected to the first end of the lifting device in a certain way, so that the first end of the lifting device and then the cantilever device can be fixed relative to the at least one track. As an alternative to fixing / fixing the first fixing device on at least one track, the track can also be connected to a fixed track by one or more connecting components, and the fixed track preferably extends parallel to the at least one track, wherein the first fixing device is connected to the first end of the lifting device by one or more coupling elements and can be fixed relative to the fixed track. In particular, the fixed track enables the lifting drive according to the present invention to be converted into a traditional lifting drive with a clamp. Accordingly, one or more components may be present between the second fixing device and the second end of the lifting device, as long as the second fixing device is connected to the second end of the lifting device in a certain way, so that the second end of the lifting device and thus the cantilever device can be fixed relative to the at least one track. As an alternative to fixing the second fixing device on the track, the second fixing device can also be fixed on the fixing track connected to the at least one track by means of one or more connecting elements, and the second fixing device can be connected to the second end of the lifting device by one or more coupling elements. The connection of the first and second fixing devices to the end of the lifting device can be reversibly detachable, for example, constructed as a screw connection, or can be irreversibly detachable, for example, constructed as welding. If the cantilever device is fixed relative to the track only by one of the fixing devices, the lifting device is designed to hold the cantilever device. The first end can be one end of the cylinder of the lifting device, or one end of the piston of the lifting device. In addition to bridge construction, the lifting drive can also be used for tunnel construction or ramp construction.

[0010] Since the lifting device can be fixed / fixed relative to the at least one track by means of the first fixing device and / or the second fixing device, a safe movement of the cantilever device can be achieved when the cantilever device is connected to the first end of the lifting device, without the cantilever device moving in the direction of movement or opposite to the direction of movement, for example due to the inclination of the bridge to be built. In particular, at high longitudinal inclinations of the bridge, i.e. at inclinations of the bridge greater than 2°, corresponding to 3.5%, uncontrolled movements of the cantilever device supported by rollers or rolling bearings can be avoided and / or braked by means of one or both of the first and second fixing devices. Thus, the first and second fixing devices form a braking system for the reliable movement of the cantilever device. The braking system prevents uncontrolled movements of the cantilever device, such as sliding or skidding. No bearings of the cantilever device need to be engaged. Only two fixing devices need to be attached to the lifting device, which fix the lifting device relative to the track respectively, so that the lifting drive has a simple and compact design.

[0011] According to the invention, a fixing device for fixing / fixing the main frame of the cantilever device relative to the track is provided at each end of the lifting device, so that when the main frame connected to the first end moves due to the extension or retraction of the lifting device, the lifting device can be fixed relative to the track at the second end. The main frame can then be fixed relative to the track by the first fixing device, and the second fixing device can be separated from the track, so that the retraction or extension of the lifting device can be achieved without the main frame moving. The lifting device can then be used again to move the main frame. Therefore, during the movement, the main frame is always fixed relative to the track by one of the two fixing devices, so that the cantilever device can be moved safely without uncontrolled movement of the cantilever device. The first fixing device and the second fixing device used as a braking system do not engage in the bearing of the cantilever device, but are connected to one of the two ends of the lifting device respectively. Therefore, no matter how the cantilever device is supported, the cantilever device can be reliably moved even if the longitudinal inclination of the bridge exceeds 2°, which is equivalent to 3.5%. This applies both to forward movement and backward movement, wherein no modification of the lifting drive or the cantilever device is required. Instead of inserting the wedges in front of the rolling bearings of the boom arrangement, the fixing device can be controlled hydraulically, for example.

[0012] According to the present invention, the self-locking of the movement of the cantilever device is not achieved by friction as in the prior art, but the controlled movement of the cantilever device is ensured by fixing each of the two fixing devices relative to the track by means of a form fit or a press fit. Therefore, there is no need to use sliding bearings, and it can be reliably moved on rollers or drums, so that factors affecting friction such as ice, oil, dirt, and water do not affect the braking operation of the cantilever device. Instead, the movement of the cantilever device can be carried out in a friction-minimized manner by rollers / drums, and can be simply controlled by the lifting and lowering movement of the lifting device. In addition, in the case of not using sliding bearings, wear parts such as components that slide on each other, such as sliding plates, are omitted. Due to the minimized friction, the efficiency of the arrangement consisting of the lifting drive and the cantilever device is increased due to the reduced friction. Even the friction of the roller bearing or rolling bearing can be reduced, because the uncontrolled movement of the cantilever device can be avoided only by the lifting drive of the present invention with two fixing devices. With the reduction of bearing friction, the efficiency loss of the arrangement consisting of the lifting drive and the cantilever device increases, because the energy required to move the cantilever device is reduced.

[0013] With the increasing safety requirements in the future, a positive-fitting fixing of the first and / or second fixing device to the rail, for example by means of a recess or groove that snaps into the rail, offers greater safety than a force-fit fixing, for example by clamping the corresponding fixing device to the rail or to a fixing rail connected to the rail. Finally, the operator does not need to be in the direct danger zone of the main frame, the bearings of the boom device and / or the lifting device. This applies not only to the operation of the fixing device by hydraulic, pneumatic or electrical control, but also to manual operation, since the operator can manipulate a toggle lever as part of the corresponding fixing device, so that he does not need to enter the space above the rail.

[0014] In a preferred design of the present invention, the lifting device is fixed relative to the at least one track in a certain way, so that when the first end of the lifting device is lifted and lowered relative to the at least one track in one direction so that the main frame moves relative to the at least one track, the second fixing device is fixed relative to the at least one track, and during the lifting and lowering movement of the second end of the lifting device relative to the at least one track in one direction, the first fixing device is fixed relative to the at least one track. In this way, a given stroke of the lifting device can be effectively used to move the main frame and thus the cantilever device. For example, the lifting device is extended to move the main frame relative to the track, and the lifting device is retracted when the main frame is stationary relative to the track to perform the next stroke. The lifting device and the fixing device thus form a crawler, which is connected to the main frame and is designed to perform the movement of the crawler relative to the track, in particular to move the main frame relative to the track.

[0015] The main frame can be guided by the at least one rail by means of roller bearings or rolling bearings, wherein according to the invention the first and second fixing means are designed to correspond to or be identical to each other. The corresponding design of the two fixing means helps to achieve a low cost and a simplified structure of the fixing means compared to different designs. The friction coefficient of roller bearings and rolling bearings is lower than that of sliding bearings. In particular, the identical design of the fixing means enables batch or mass production and is also advantageous for safety reasons, since only one fixing means needs to be certified.

[0016] Both the first fixing device and the second fixing device can have the property of being fixable relative to at least one rail by a form fit and / or a press fit, in particular being able to be fixed to the rail and / or to at least one fixing rail connected to the rail. In this case, it is not necessary to use a sliding bearing and a safe and friction-minimized movement can be performed on rollers or drums.

[0017] Advantageously, at least one fixing device comprises at least one fixing layer or fixing element, such as a brake pad, for abutting against at least one track or against at least one fixing track connected to the track in the fixing state. Here, an unlocking lifting device, such as a pneumatic or hydraulic lifting device, is arranged to interact with the fixing layer or fixing element and with elastic means, such as one or more disc springs or leaf springs, so that when the unlocking lifting device is retracted and / or deactivated, the fixing layer or fixing element abuts against the at least one track or against at least one fixing track connected to the track via the elastic means for fixing the fixing device. In this way, there is a self-locking fixing device with a simple structure, reliability and low manufacturing cost, which can be fixed without control, which increases the safety of the construction site.

[0018] At least one of the fixing devices preferably comprises at least one snap-on / snap-on element, for example in the form of a pawl or a foldable hook, wherein the at least one track or the fixing track comprises a recess and / or a groove in its longitudinal direction, into which the at least one snap-on / snap-on element can be snapped, so that the fixing device is fixed relative to the at least one track. This produces a fixing device with a simple structure and reliability, which is designed to interact with the track or the fixing track to be fixed on the track or the fixing track. Alternatively, each fixing device may include a clamp, which is designed to be clamped below a flange present on one side of the track or the fixing track in the longitudinal direction. The end of the clamp that is clamped below the flange is designed to be connected with the flange in a press fit, for example, by a clamping connection. The clamping connection can be achieved by a clamp or a screw inserted into a thread on the arch foot.

[0019] In a preferred embodiment, the stroke length of the lifting device is selected to be greater than or equal to the distance between adjacent recesses and / or grooves in the longitudinal direction of the at least one track or the fixing track, so that when the fixing device is fixed relative to the at least one track, the stroke length is sufficient to move the main frame by the distance between adjacent recesses and / or grooves. Particularly preferably, the recesses and / or grooves have the same distance over the length of the at least one track or the fixing track or a part thereof. In this case, the distance between adjacent recesses and / or grooves is selected in such a way that each of the recesses and / or grooves can be used by the fixing device to fix or "support" the lifting device on the track.

[0020] Preferably, the fixing means respectively comprise at least one manual, hydraulic, pneumatic or electric lifting device for performing a linear translational movement, which is designed to ensure that the at least one snap-in / catch element snaps reversibly into a recess or groove of the at least one track or fixing track. The lifting device can be used for raising and lowering the pawl, i.e. separating the pawl from the track or fixing track, and fixing the pawl to the track or fixing track. Compared with hydraulic lifting devices, electric lifting devices allow more flexible control, but require on-site electricity at the construction site, so hydraulic and pneumatic lifting devices are often preferred to electric lifting devices. Advantageously, the hydraulic / pneumatic lifting device can be replaced by an electric lifting device or an electric lifting device can be added.

[0021] The cantilever device is advantageously guided by two or four tracks arranged parallel to each other, wherein the first and second fixing devices comprise one pawl for each track, so that each track corresponds to a total of two pawls of the first and second fixing devices, and the lifting drive of the cantilever device comprises a total of either two tracks and four pawls, or four tracks and eight pawls. In this embodiment of the lifting drive, the maximum permissible load of the cantilever device is increased compared to a lifting drive with fewer pawls. Such a lifting drive can in particular move and brake a cantilever device, such as a cantilever device used in bridge construction. The pawls of the respective first fixing device and / or second fixing device, which are opposite to each other in a direction perpendicular to the longitudinal direction of each track, of the two tracks can be connected by a web, which is designed so that the pawls move together.

[0022] The manual lifting device advantageously comprises a rotatable toggle lever, for example in the form of a rod, an axle or a rod, one end of whose lever arm is rotatably coupled to the web at a substantially central position between the opposite pawls perpendicular to the longitudinal direction of each track, through which the first connected fixing device pawls of the two tracks and / or the second connected fixing device pawls of the two tracks are moved together. The toggle lever acting together on the two pawls enables a simple construction of the manual fixing device and enables the simultaneous lifting and / or lowering of the pawls. In this way, the corresponding fixing device can be operated manually quickly and effectively. The toggle lever can be coupled to the web by a clamp that can be moved along the web. When the toggle lever is not in use, the clamp can be moved to one end of the web so as to align the end of the toggle lever facing away from the web parallel or substantially parallel to the web. In this way, installation space can be saved.

[0023] Advantageously, at least one of the hydraulic, pneumatic or electric lifting devices, preferably two of these lifting devices, is coupled to the web and is designed to move the first fastening device pawls of the two rails connected via the web and / or the second fastening device pawls of the two rails connected via the web together. This results in a simple and automatically controllable lifting drive which is designed to move the pawls together.

[0024] The lifting drive may include a controller configured to control the hydraulic or pneumatic lifting device with the aid of an existing hydraulic or pneumatic unit, for example for moving the main frame via the lifting device, or for moving the upper and / or lower load-bearing device fixed to the main frame relative to the main frame, or with the aid of a hydraulic or pneumatic unit independent of the existing hydraulic or pneumatic unit. The use of existing units reduces the number of components that need to be purchased and stored, which is particularly advantageous at construction sites where storage space is limited. The controller enables automated or fully automatic operation of the first fixing device and / or the second fixing device.

[0025] The controller is preferably arranged in such a way that each snap-in / snap-in element is controlled individually by a hydraulic or pneumatic unit, or several snap-in / snap-in elements, for example all snap-in / snap-in elements of the first or second fixing device, are controlled jointly. This results in a simple and reliable lifting drive.

[0026] The controller may be configured such that the snap-in element can be separated from the track or the fixed track by one or more hydraulic, pneumatic or electric lifting devices, and the snap-in element can snap into at least one recess and / or groove of the track or the fixed track by itself due to gravity and / or other forces, such as the elastic force of a spring or another elastic device, i.e. without controlling the one or more hydraulic, pneumatic or electric lifting devices. Since only the snap-in element needs to be lifted, the energy required to operate the lifting drive is reduced compared to a lifting drive that has to control the lowering of the snap-in element.

[0027] The lifting device is advantageously designed as a hydraulic cylinder, a spindle drive or a rack and pinion drive, an actuator or a linear drive, wherein the spindle drive or the rack and pinion drive is driven, for example, by an electric motor. These types of lifting devices are reliable and can obtain different stroke lengths and lifting capacities.

[0028] The invention also relates to a rail-guided boom arrangement comprising a lifting drive according to the invention.

[0029] The invention also relates to a method for moving a rail-guided cantilever arrangement with a lifting drive according to the invention, in particular for bridge construction. The method comprises the following steps:

[0030] - fixing the second fixing device relative to the at least one rail when the lifting device is at least partially retracted or at least partially extended,

[0031] - performing a lifting movement of the first end of the lifting device relative to the at least one track in one direction, either in the form of a movement of the first end of the lifting device towards the second end of the lifting device or in the form of a movement of the first end of the lifting device away from the second end of the lifting device, wherein a main frame fixed to the first end of the lifting device is moved relative to the at least one track in the longitudinal direction of the track along the direction,

[0032] - after the lifting and lowering movement of the lifting device along the direction is completed, the first fixing device is fixed on the at least one track, and the second fixing device is separated from the track, and

[0033] - performing a lifting and lowering movement of the second end of the lifting device relative to the at least one track in the direction, wherein the main frame is fixed relative to the at least one track by a first fixing device, and the second fixing device is moved relative to the at least one track in the longitudinal direction of the track along the direction.

[0034] The one direction may be defined as a forward or backward direction of the main frame. The first end of the lifting device may be one end of a lifting cylinder or one end of a piston of the lifting device. The lifting device, i.e. the lifting piston, may be extended relative to the lifting cylinder so as to move the main frame relative to the at least one track, and the lifting device may be retracted when the main frame is stationary relative to the track so as to perform the next stroke. Alternatively, the lifting device, i.e. the lifting piston, may be retracted relative to the lifting cylinder so as to move the main frame relative to the track, and the lifting device may be extended when the main frame is stationary relative to the track so as to perform the next stroke. The lifting device and the fixing device thus form a crawler, which is connected to the main frame and implements a crawler movement relative to the track, and in this case moves the main frame relative to the track. This method allows the structure to remain unchanged during the retraction and extension movement of the two fixing devices. There is no need to separate the lifting device from the main frame and reconnect it to the main frame. Instead, the layout consisting of the lifting device and the fixing device can be used in an unchanged form for forward and backward movement. This simplifies the operation of the lifting drive and improves work safety.

[0035] If the second fixing device is separated from the at least one track (4a, 4b, 4'a, 4'b), in particular from the at least one track or from the fixing track connected to the track, only when the first fixing device is fixed relative to the at least one track after the lifting movement of the lifting device in one direction is completed, then when the main frame is stationary relative to the track, the main frame is fixed relative to the at least one track by two fixing devices. Compared with the case where the main frame is fixed relative to the track by only one of the fixing devices, this increases the reliability of the fixing. This effectively avoids uncontrolled movement of the main frame, which may occur, for example, when the piston is separated from the cylinder of the lifting device when fixing is performed only by the second fixing device.

[0036] Advantageously, the lifting movement of the lifting device in one direction and in the other direction is performed partially or completely and to the same extent in terms of the stroke length. If the same, in particular the complete, stroke length is used in both directions of the lifting movement, i.e. during the retraction and extension of the lifting device, the movement to be performed can be completed with a minimum number of fixing and separation operations of the first and second fixing devices. This minimizes the effort and energy consumption when operating the lifting drive.

[0037] The method steps according to the invention are preferably defined as a cycle and the cycle is repeated until the main frame is moved in one direction relative to the at least one rail by a predetermined displacement, for example the length of the portion to be concreted with the cantilever device.

[0038] Advantageously, the fixing means respectively comprise at least one manual, hydraulic, pneumatic or electric lifting device for performing a linear translational movement, the lifting device being designed to fix the fixing means relative to the at least one track in a reversibly detachable manner and to detach the fixing means relative to the at least one track, and to achieve automatic fixing of the respective fixing means relative to the at least one track by means of the engagement of at least one snap-in element in a recess or groove of the at least one track or of a fixing track connected thereto, by means of gravity and / or another force, such as the elastic force of a spring or another elastic means, i.e. without manipulation and / or control of the respective manual, hydraulic, pneumatic or electric lifting device. Since only the snap-in element has to be lifted, the energy required to operate the lifting drive is reduced compared to solutions where the snap-in element has to be lowered manually or by means of a control. The manipulation of the fixing means is semi-automatic when the snap-in element is lifted manually and not lowered manually. When the snap-in / snapping element is raised by control, and the snap-in / snapping element is not lowered by control, the actuation of the securing device is fully automatic.

[0039] For more features and advantages of the present invention, please refer to the detailed description of the embodiments of the present invention and the scope of claims below, as well as to the drawings showing the essential details of the invention. The features shown in the drawings are shown in a way that the particularity of the present invention can be clearly seen. Different features can be implemented in technical variants of the present invention individually or in any combination. In the drawings, the same reference numerals represent the same or corresponding elements.

[0040] in:

[0041] Figure 1 A cantilever device for bridge construction is shown, having a main frame guided by four rails and fixed to a lifting drive of the present invention;

[0042] Figure 2a , 2b by Figure 1 The partial view (a) of and the partial enlarged view (b) of the former show the lifting drive of the present invention including the lifting device and the fixing device, both of which are spatial external views of the first embodiment;

[0043] Figure 3a , 3b A side cross-sectional view shows a fixing device according to a first embodiment of the invention in an unlocked (a) and locked (b) state relative to a track, which is fixed in a form-fitting manner on the end of the lifting device to which the main frame is fixed;

[0044] Figure 4a , 4bA front view (a) and a spatial external view (b) are shown in a locked state according to a second embodiment of the present invention. Figure 3b The fixing device shown is a combination of two fixing components with a common manual lifting device;

[0045] Figure 5a , 5b A front view (a) and a spatial external view (b) are shown in a locked state according to a third embodiment of the present invention. Figure 3b The fixing device shown is a combination of two fixing components with a common hydraulic lifting device.

[0046] Figure 6a -c is as follows Figure 2b Side cross-sectional views of a lifting drive of the present invention shown, including a retracted lifting device and a locked fixing device (a), including a partially extended lifting device and an unlocked fixing device located at the end of the lifting device to which the main frame is fixed (b), and including an extended lifting device and a locked fixing device (c);

[0047] Figure 7a -c are shown in spatial external view Figure 6a The lifting drive according to the present invention shown in -c is different in that at the end of the lifting device for fixing the main frame, the fixing device is Figure 7a The middle is unlocked;

[0048] Figure 7d -f is as follows Figure 2b The spatial external view of the lifting drive of the present invention shown includes a locked fixing device at the end of the lifting device for fixing the main frame, and an extended lifting device (a), and a partially retracted lifting device (b), and a retracted lifting device and a locked fixing device (c);

[0049] Figure 8a , 8b According to a first embodiment of the invention, a fixing device fixedly positioned at one end of a lifting device by a form fit is shown in a side cross-sectional view in an unlocked (a) and locked (b) state relative to a track;

[0050] Fig. 9 A lifting drive according to the invention according to a second embodiment is shown, comprising a lifting device and Figure 8a , 8b The fixing device shown;

[0051] Fig.10 A top cross-sectional view of a fixing device that can be fixed on a fixing rail by means of a shape-fitting fixing according to a second embodiment of the present invention;

[0052] Fig.11 A lifting drive according to the invention according to a second embodiment is shown, comprising a lifting device and Fig.10 The fixing device shown.

[0053] Figure 1 A cantilever device 2 is shown, which is used for concreting the part to be concreting at the end of the outer part of the bridge 1. The cantilever device 2 includes a base frame with two main frames 3, 3'. For the concrete pouring of the next bridge section, the cantilever device 2 can be moved in the Z direction along the direction R1. The main frame 3 includes a plurality of pillars 3a-3c connected to each other. At the end of the pillar 3a facing the bridge 1, the main frame 3 includes a frame base 3d, which is abutted on two mutually parallel rails 4a, 4b through roller bearings (not shown), and these rails are all installed on the surface 1a of the bridge. The main frame 3 is connected to another main frame 3' by a cross brace Q1-Q3 and has pillars 3'a-3'c connected to each other. The other main frame 3' is guided by two mutually parallel rails 4'a, 4'b through another frame base 3'd, so that the main frames 3, 3' can move together in the forward direction (Z direction) and / or in the backward direction (negative Z direction). For this purpose, the main frame 3' rests on the rails 4'a, 4'b by means of the other frame base 3'd. The rails 4a, 4b, 4'a, 4'b are located parallel to each other on the surface 1a and are connected thereto so that the rails cannot be lifted in the Y direction. The frame bases 3d, 3'd include brackets that clamp the rails 4a-4'b from below and are locked to prevent lifting in the Y direction.

[0054] In order to strengthen the bridge 1, a hollow box 1b is provided below the surface 1a in the negative Y direction as a part of the bridge 1. In addition to the main frames 3, 3', the cantilever device 2 includes an upper bearing device 3" and a lower bearing device 3"'. Figure 1 The formwork, not shown, is used to pour concrete for the next bridge section.

[0055] The frame bases 5, 5' are each fixed to a lifting device 5, 5', which is connected to the frame bases 5, 5' in the negative Z direction. The partial view A shows the area of ​​the lifting device 5, and the partial view A' shows the area of ​​the lifting device 5'. Here, the main frames 3, 3' are each connected to a lifting drive according to the invention, wherein the lifting drive for driving the main frame 3 comprises the lifting device 5, and the lifting drive for driving the main frame 3' comprises the lifting device 5'.

[0056] Figure 2a for Figure 1, showing a main frame 3 and a lifting device 5, wherein the lifting device 5 is fixed to a frame base 3d of the main frame 3 in the Z direction. At one end of the frame base 3d that is not fixed to the lifting device 5, the frame base is connected to pillars 3a, 3b, which are in turn connected to each other via pillars 3c. Other pillars are connected to pillars 3a in the negative Z direction, which are connected to each other to form another frame base, which can be fixed to rails 4a, 4b and is designed to form a counterweight for the upper carrier 3" and the lower carrier 3"'. The rails 4a, 4b extend in the Z direction and are aligned parallel to each other, so that the frame base 3d can be rolled against the rails 4a, 4b in order to move forward in the Z direction or backward in the negative Z direction. The frame base 3d can also be abutted against the rails 4, 4b or only one of these rails by means of sliding bearings.

[0057] Figure 2b Shown in a spatially enlarged external view Figure 2a The present invention is a partial view of a lifting device 5, wherein in addition to the lifting device 5, the lifting drive of the present invention also includes a first fixing device 6 having a first fixing component 6a, 6b and a second fixing device 7 having a second fixing component 7a, 7b, which are located on the first end and the second end of the lifting device 5 opposite to each other. The two first fixing components 6a, 6b are both connected to the first end of the lifting device 5, and the frame base 3d is fixed on the first end. The first fixing component 6a is designed to fix the first end of the lifting device 5 on the track 4a, and the other first fixing component 6b is designed to fix the first end of the lifting device 5 on the track 4b. For the first fixing device 6, one fixing component 6a or 6b is sufficient, but if the two first fixing components 6a, 6b are fixed on the track together, the main frame 3 is more reliably fixed on the track 4a, 4b through the frame base 3d.

[0058] At the second end of the lifting device 5 opposite to the first end of the lifting device 5 to which the frame base 3d is fixed, a second fixing device 7 having second fixing components 7a, 7b is connected to the lifting device 5. The second fixing components 7a, 7b are each connected to the second end of the lifting device. The second fixing component 7a is designed to fix the second end of the lifting device to the track 4a, and the second fixing component 7b is designed to fix the second end of the lifting device to the track 4b. For the second fixing device 7, one fixing component 7a or 7b is sufficient, but if the two second fixing components 7a, 7b are fixed on the track together, the main frame 3 is more reliably fixed on the track 4a, 4b through the frame base 3d, the lifting device 5 and the second fixing device 7.

[0059] At the first end of the lifting device 5 connected to the first fixing device 6, the frame base 3d is fixed in the Z direction in such a way that it is fixed to the first end of the lifting device 5 by the first fixing elements 6a, 6b of the first fixing device 6. The frame base 3d does not have to be fixed to the lifting drive according to the invention in the Z direction by the lifting device 5, the first fixing device 6 and the second fixing device 7, but the frame base 3d and the cantilever device can also be fixed to the first end of the lifting device 5 in the negative Z direction. The frame 3 can also be arranged between the first end of the lifting device 5 and the first fixing device 6 by the frame base 3d, as long as the main frame 3 is fixed to the first end of the lifting device 5 and the first fixing device is connected to the first end of the lifting device 5, so that the first fixing device can fix the first end of the lifting device 5 to at least one of the rails 4a or 4b.

[0060] Although the main frame 3 rests on the surface 1a of the bridge 1 via two rails 4a, 4b, the main frame 3 may also rest on only one of the two rails 4a, 4b. In this case, only the first fixing component 6a or 6b is connected to the first end of the lifting device 5 as the first fixing device 6, and at the second end of the lifting device 5, only one of the second fixing components 7a or 7b is connected to the lifting device 5 as the second fixing device 7. The two rails 4a, 4b achieve a higher load capacity than only one rail 4a or 4b. Figure 1 Compared with the lifting drive of the present invention including the lifting device 5, 5' and the main frame 3, 3' fixed on the lifting device through the frame base 3d, 3'd shown in the partial A, A' of the present invention, it can be seen that Figure 2a , 2b The description of the lifting drive of the present invention including the lifting device 5 and the main frame 3 including the frame base 3d corresponds to the description of Figure 1 The partial A' of the embodiment shows a lifting drive of the present invention including a lifting device 5' and a main frame 3' including a frame base 3'd.

[0061] Figure 3aThe first fixing device 6 acting as a shape-fitting fixing type fixing device in an unlocked state relative to the track 4b is shown in a lateral cross-sectional view, which includes a first fixing component 6a located on the first end of the lifting device 5, which can be and has been connected to the main frame 3. The fixing components 6a, 6b have a corresponding structure including the same components, which reduces the manufacturing cost of the lifting drive of the present invention, but is not the essence of the present invention. The first fixing component 6b includes a base plate 6b1, and the first guide plate 6b3 is arranged on the base plate along the Y direction. In the negative Z direction, the retaining plate 6b2 is arranged on the base plate 6b1 in a certain way so that the retaining plate 6b1 can be engaged under the track 4b in the negative Y direction. The retaining plate 6b2 is designed to prevent the first fixing component 6b and the first fixing device 6 from being lifted from the track 4b in the Y direction. In order to ensure that the fixing component 6b moves forward or backward, the selected distance between the retaining plate 6b1 and the base plate 6b3 is greater than the height of the track 4b.

[0062] like Figure 3b As shown, a long hole along the Y direction is provided in the first guide plate 6b3, in which the web 8 is guided, wherein, at one end of the web 8, a snap-fit / clip element in the form of a pawl 6b5 is arranged on the end of the web 8 along the X direction (in a manner extending out of the plane of the drawing page). The pawl 6b5 is guided next to the long hole via the recess 6b" in the base plate 6b1, so that the width 6b' of the pawl 6b5 is selected to be equal to or smaller than the width 6b" of the recess in the base plate 6b1. Figure 3a In the embodiment, the pawl 6b5 is in a position away from the track 4b at the end of the long hole in the Y direction, especially at the stop, so that the fixed component 6b is unlocked relative to the track 4b. Therefore, the pawl 6b5 is in an unlocking position PE relative to the track 4b and / or the guide plate 6b3. The width 6b"' of the recess in the retaining plate 6b2 is greater than the width 6b' of the pawl 6b5, so that when the pawl 6b5 moves in the negative Y direction, the end of the pawl 6b5 facing the track 4b (in the negative Y direction) can pass through the recess in the retaining plate 6b2 in addition to the recess in the base plate 6b1. In the unlocking position PE, the end of the pawl 6b5 facing the track 4b is located in the area of ​​the track 4b away from the surface 1a (above the track 4b), so that the fixed component 6b can move in the forward or backward direction of the main frame 3. The first fixing device 6 has a first connecting element 9 in the Z direction, which is used to fix the first fixing device 6 to the frame base 3d and then to the main frame 3. The first fixing device 6 is connected to the lifting device 5 in the negative Z direction so that it can fix the first end of the lifting device 5 in the Z direction on the track 4b.

[0063] Figure 3bThe first fixed component 6b is shown in a side cross-sectional view in a locked state relative to the track 4b. The width of the long hole provided in the first guide plate 6b3 is equal to or less than the width of the web 8. The pawl 6b5 is in a position facing the track 4b at the end of the long hole in the negative Y direction, in particular at the stop, so that the fixed component 6b and the lifting device 5 connected to the first fixed component 6b at the first end are fixed. Therefore, the pawl 6b5 is in the locking position PV. In the locking position, the pawl 6b5 passes through the recess 4b1 made in the track 4b, whose width 4b' is equal to or greater than the width 6b' of the pawl 6b5. The distance PA between the unlocking position PE and the locking position PV is selected so that the pawl 6b5 passes through at least a part of the recess with a width of 6b" in the base plate 6b1, the recess with a width of 4b' in the track 4b, and the recess with a width of 6b"' in the retaining plate 6b2. Since the pawl 6b5 fixed on the web 8 is guided in the locking position by the long hole in the first guide plate 6b3, the recess in the base plate 6b1 and the recess in the retaining plate 6b2, it is ensured that the first fixed component 6b of the first fixed device 6, the first end of the lifting device 5 and the main frame 3 fixed thereon are stably and reliably locked on the track 4b.

[0064] Figure 4a Before view, and Figure 4b The space enlarged external view shows Figure 3a , 3b The first fixed device 6 shown in the locking position PV comprises a first fixed component 6 and another first fixed component 6a combined therewith, which has a common manual lifting device. The other first fixed component 6b is constructed according to the first fixed component 6b and includes a base plate 6a1, which comprises a retaining plate 6a2 arranged on the base plate in the direction facing the track 4a, i.e., the negative Y direction, and comprises a first guide plate 6a3 and a second guide plate 6a3' arranged on the base plate in the direction away from the track 4a, i.e., the Y direction. A pawl 6a5 is guided between the first and second guide plates 6a3, 6a3' which are substantially parallel to each other, and the pawl extends in the Y direction and substantially corresponds to the geometric dimensions of the pawl 6b5 of the first fixed component 6b, and the pawl is guided between the first guide plate 6b3 and the second guide plate 6b4 which is substantially parallel thereto. The two first fixed components 6a, 6b are connected to each other by a first connecting plate 10. The base plates 6a1, 6b1 are designed as a common plate, which simplifies the construction of the two fixed components, but different plates that can be connected to each other may also be used.

[0065] The two fixed components 6a, 6b share a web 8, on one end of which in the X direction a pawl 6b5 is arranged, and on the other end of which in the negative X direction a pawl 6a5 is arranged. Approximately at the center of the web 8, one end of a toggle lever 20 is rotatably coupled to the web by a clamp 18. The approximate center position 18' of the clamp 18 relative to the web 8 allows the web 8 to move in a direction away from the rails 4a, b, i.e. in the Y direction, or in a direction facing the rails 4a, b, i.e. in the negative Y direction, with approximately the same mass on both sides of the clamp 18. The clamp 18 has a recess 19 so that the end of the toggle lever 20 coupled to the web 8 can be rotatably connected to the clamp 18, for example by screwing. The toggle rod 20 is abutted against the recess 6a3' of the first guide plate 6a3 and is guided relative to the first base plate 6a3 by the guiding devices 19', 19" connected to the toggle rod 20, and when the toggle rod 20 is guided by the recess 6a3', the guiding devices are located on the opposite side of the first guide plate 6a3. The guiding devices 19', 19" can be respectively realized by screwing, in which the screw is guided through the through hole in the toggle rod 20 in the Z direction and locked by the nut. In this simple way, when the toggle rod is arranged or placed in the recess 6a3', the toggle rod 20 is guided by the head of the screw and the nut opposite to the head on the other side of the toggle rod. The first guide plate 6b3 also has a recess at its end facing away from the rails 4a, 4b, i.e. in the Y direction, so that the toggle lever 20 can be guided or placed not only in the recess 6a3' of the first fixed component 6a, but also alternatively in the recess at the end of the first guide plate 6b3 of the first fixed component 6b.

[0066] The clamp 18 can be fixed to the web 8, or can be movably arranged on the web, such as Figure 4a , 4b The clamp is arranged on the web 8 in such a way that it can move along the web 8, i.e. in the X direction and in the negative X direction. In this way, when the toggle lever 20 is lifted out of the recess 6a3' by lifting it in the direction away from the rails 4a, 4b, i.e. in the Y direction, it can be aligned substantially parallel to the web 8 in a space-saving manner. If the clamp 18 is at a minimum distance from the first guide plate 6a3 or the further first guide plate 6b3 or rests on it, the space requirement of the toggle lever 20 is minimized, which serves to increase working safety.

[0067] A second connecting plate 11 is mounted on the first connecting plate 10 and is connected to a locking pin 13, for example, for fixing the first end of the lifting device 5, through a locker 12. For example, a first connecting element 9, for fixing the frame base 3d of the main frame 3, is also fixed to the connecting plate 11 and thus fixed to the first connecting plate 10, and then fixed to the first fixing components 6a, 6b, and then fixed to the first fixing device 6. A third connecting plate 14 and a second connecting element 15 having a through hole 16 for fixing the frame base 3d are connected to the first connecting element 9.

[0068] The structure of the first fixed components 6a, 6b is constructed axially symmetrically in the Y / Z direction relative to a plane formed centrally between the fixed components, which simplifies the common structure. The common structure of the first fixed device 6 is further simplified by allowing the two pawls 6a5, 6b5 to move toward and away from the rails 4a, 4b, i.e., to be lifted and lowered, by a common web 8 and a toggle lever 20. By locking the pawls in the direction facing the rails 4a, 4b, i.e., in the negative Y direction, movement in the direction facing the rails 4a, 4b, i.e., in the negative Y direction, is required only when the toggle lever 20 is unlocked at the end opposite to the end connected to the web 8. The recesses 4a1 and 4b1 in the rails 4a, 4b are opposite in a direction perpendicular to the longitudinal direction of each of the rails 4a, 4b, i.e., in the X direction. Once these recesses are as Figure 3bAs shown, the pawls 6a5 and 6b5 can be engaged, and each of the pawls 6a5 and 6b5 falls into the corresponding recesses 4a1 and 4b1 of each of the rails 4a and 4b due to gravity. As an alternative or supplement to gravity, another force, such as the elastic force of a spring or another elastic device, can be applied so that each of the pawls 6a5 and 6b5 falls into the corresponding recesses 4a1 and 4b1 of each of the rails 4a and 4b. In this way, in a particularly advantageous embodiment of the lifting drive of the present invention, the first fixing device 6 can be semi-automatically manually operated. With the help of the web 8 and the toggle lever 20, the first fixing component 6b is fixed to the rail 4a in a reversibly detachable manner, and the other first fixing component 6a is fixed to the rail 4b in a reversibly detachable manner. In the unlocking position PE, the first fixing component 6a is released from the rail 4a, and at the same time, in this position, the other first fixing component 6b is released from the rail 4b. In the locking position PV, the fixed component 6a is fixed on the track 4a, and the fixed component 6b is fixed on the track 4b. According to a particularly advantageous embodiment of the first fixed device, and thus according to the lifting drive of the present invention, the first fixed component 6a and the further first fixed component 6b can be locked and unlocked together with the web 8 and the toggle lever 20. Advantageously, the second fixed device 7 comprising the second fixed components 7a, 7b has a structure corresponding to or identical to the first fixed device 6. This simplifies the overall structure of the lifting drive according to the present invention and ensures the high reliability of the lifting drive. It is also possible that the first and second fixed devices 6, 7 each include only one pawl, which can be snapped into one of the tracks 4a, 4b or into both tracks 4a, 4b. The first fixed device 6 and / or the second fixed device 7 can also include more than two pawls, which can be manipulated individually, partially together or completely together.

[0069] Figure 5a Before view, and Figure 5b The spatial external view shows the locking position PV in the locked state. Figure 3b The first fixing device 6 shown is designed as a combination of second fixing components 6a and 6b with a common hydraulic lifting device. Due to the presence of a large number of identical parts / components, only the second fixing components 6a and 6b will be discussed. Figure 4a , 4b 6a1 . The first fixing assembly 6a of the first fixing device 6 is assigned a first hydraulic lifting device 21a-24a, which is arranged between the web 8 and the base plate 6a1. The lifting cylinder 21a, in which the piston (not shown) is retracted, is connected to the base plate 6a1 via a first flange 24a, which snaps into a socket 22a of the base plate 6a1, and the piston is connected to the web 8 via a second flange 23a. Figure 5bA through hole 25a in the socket 22a is shown, which is designed to transition to a corresponding through hole in the first flange 24a, so as to fix the lifting cylinder 21a on the base plate 6a1, for example by screwing. The lifting cylinder 21a is designed to extend the piston in a direction away from the track 4a, i.e., in the Y direction, and to retract the piston in a direction facing the track 4a, i.e., in the negative Y direction. In the extended state of the lifting device, the first fixed component 6a is in the unlocked position PE, and in the retracted state of the lifting device, the first fixed component 6a is in the locked position PV.

[0070] The other first fixing component 6b of the fixing device 6 has another lifting device 21b-24b, wherein the construction of the other lifting cylinder 21b with a retracted piston (not shown) corresponds to the lifting cylinder 21a. On the base plate 6b1, another socket 22b is arranged, by which another first flange 24b of the lifting cylinder 21b is connected to the base plate 6b1. At the end of the piston facing away from the track 4b, there is another second flange 23b, by which the other lifting cylinder 21b is connected to the web 8. The other lifting cylinder 21b is designed to extend the piston in the direction away from the track 4b, that is, in the Y direction and unlock the fixing device 6, and to retract the piston in the direction facing the track 4b, that is, in the negative Y direction, with respect to the web 8, to lock the fixing device 6. The lifting devices 21a-24a and 21b-24b have the same construction, thereby achieving a simple construction of the fixing device 6. The two lifting devices are controlled together to ensure that the two lifting devices operate synchronously.

[0071] It is feasible to control both lifting devices only when it is necessary to unlock the first fixing device 6. Once the pawls 6a5 and 6b5 of the first fixing device 6 can be engaged in the recesses 4a1, 4b1 of the rails 4a, 4b, the engagement of the pawls 6a5, 6b5 in the recesses 4a1, 4b1 of the rails 4a, 4b can be performed in the no-load operation of the lifting device or the lifting cylinders 21a, 21b without controlling the lifting cylinders 21a, 21b. In this way, compared with the control in the unlocking position PE and the locking position PV of the first fixing device 6, the energy consumption for operating the first fixing device 6 can be reduced.

[0072] Figure 5a , 5b The first fixing device 6 shown can also be designed and used as the second fixing device 7. Advantageously, the first and second fixing devices 6, 7 are designed in a corresponding or identical manner in order to realize a simple and reliable lifting drive according to the invention. Figure 5a , 5bIn the first fixing device 6 shown, the second connecting element 15 is used to fix the fixing device to the frame base 3d, and the first connecting plate 11 is used to fix the fixing device to the first end of the lifting device 5. The first fixing device 6 can be used as the second fixing device 7, wherein in this case, the two fixing devices are rotated 180° relative to each other in the X / Z plane.

[0073] Figure 6a The side cross-section diagram shows Figure 2b The lifting drive according to the invention shown in FIG. 1 has a retracted lifting device 5 and locked fixing devices 6, 7. The cross-sectional view corresponds to Figure 3a , 3b , and in addition to the pawl 6b5 of the other first fixing component 6b of the first fixing device 6, the pawl 7b5 of the other second fixing component 7b of the second fixing device 7 is also shown. The two pawls are in the locking position PV in the negative Y direction, whereby both ends of the lifting device 5 including the lifting cylinder 5b are fixed on the track 4b. Since the pawl 6a5 of the first fixing component 6a of the first fixing device 6 and the pawl 7a5 of the second fixing component 7a of the second fixing device 7 are also in the locking position through the web 8, the lifting device 5 is fixed on the tracks 4a and 4b by four pawls, wherein the first and second fixing devices 6, 7 are each fixed to the tracks 4a, 4b in a reversibly separable manner by two pawls. The track 4b has recesses 4b1-4b4, wherein in the locked or tightened state, the pawl 6b5 of the first fixing device 6 is snapped into the recess 4b3, and the pawl 7b5 of the second fixing device 7 is snapped into the recess 4b1. The main frame 3 can and has been connected to the first end of the lifting device 5 via its frame base 3d by means of the first fixing device 6. The first fixing device 6 is connected to the first end of the lifting device 5 so that the first end of the lifting device 5 can be fixed on the rail 4b by the first fixing device 6 and the position 6P of the first fixing device 6 relative to the rails 4a, 4b in the Z direction corresponds to the position of the first end of the lifting device 5. For this purpose, it is defined below that in the Z direction, the first end of the lifting device 5 is located at the height of the position 6P of the web 8 in the X / Y plane. This definition is for example given by Figure 4b and 5bSupport, as shown in the figure, in the Z direction, the lock 12 for connecting the first end of the lifting device 5 is approximately at the height of the web 8 in the X / Y plane. Corresponding definitions apply to the positions 7P, 7P2, 7P3 of the second fixing device. In another embodiment, the first end of the lifting device 5 can be offset relative to the web 8 in the longitudinal direction of the rails 4a, 4b and / or in a direction away from the rails 4a, 4b transverse to the longitudinal direction. The frame base 3d and the main frame 3 can be connected to the first fixing device 6 in the Z direction. In the starting position 6P, the first fixing device 6 has no displacement 6A, and therefore there is no displacement of the first end of the lifting device 5 and the main frame 3 relative to the rails 4a, 4b in their longitudinal direction.

[0074] Figure 6b Shown with the lift drive in Figure 6a Compared to the state at a later point in time, Figure 6a The state of the lifting drive shown. The piston 5a of the lifting device 5 is partially extended relative to the lifting cylinder 5b, with a stroke length of 5aA1. Since the first fixing device 6 is in an unlocked state relative to the rails 4a, 4b according to the unlocking position PE of the pawl 6b5, and the second fixing device 7 is still in a locked state according to the locking position PV of the pawl 7b5, the lifting movement of the lifting device 5 with a stroke length 5aA1 causes a displacement 6A1 of the first fixing device 6. Therefore, the stroke length 5aA1 corresponds to the displacement 6A1 of the first end of the lifting device 5 and the main frame 3 and the cantilever device 2 in the longitudinal direction of the rails 4a, 4b in the Z direction. Therefore, the position of the first fixing device 6 moves from the position 6P to the new position 6P1 in the Z direction. The distance 4bA between the adjacent recesses 4b2, 4b3 in the rail 4b is greater than the stroke length 5aA1, and the pawl 6b5 cannot be engaged in another recess in the rail 4b that is spaced a distance 4bA from the recess 4b3, and the pawl 6b5 is engaged in this recess in the initial state in the position 6P. By extending the lifting device 5 by the stroke length 5aA1, the main frame 3 fixed to the first end of the lifting device 5 is moved in the Z direction relative to the rail 4b in the longitudinal direction thereof by the displacement 6A1.

[0075] Figure 6c shows the lifting drive in Figure 6bThe state of the lifting drive of the present invention at a later point in time is compared to the state in , in which the fully extended lifting device 5 and the locked fixing devices 6, 7 are shown. The substantially complete stroke length 5aA2 corresponds at least to the distance 4bA between adjacent recesses 4b2, 4b3 in the track 4b, and since the pawl 6b5 is engaged in the recess 4b4 adjacent to the recess 4b3, the first fixing device 6 is moved relative to the starting position 6P by a distance 4bA, which corresponds to the displacement 6A2 of the first fixing device 6. The position 6P2 of the first fixing device 6 is therefore located in the X / Y plane, in which the center of the recess 4b4 in the track 4b engaged by the pawl 6b5 is located. The pawl 6b5 is in the locked position PV, and the first fixing device 6 is fixed to the track 4b like the second fixing device 7. Figure 6a Compared with the initial state of the lifting drive in the middle, the first end of the lifting device 5, and then the main frame 3, and then the cantilever device 2 move by a displacement 6A2 in the longitudinal direction of the rails 4a, 4b, that is, in the Z direction. During the displacement process of the first fixing device 6 from the position 6P to the position 6P2 relative to the rail 4b, the position of the second fixing device 7 remains unchanged according to the locking position PV of the pawl 7b5.

[0076] exist Figures 7a to 7c In the figure, the spatial external view is shown respectively. Figure 6a-6c The state of the lifting drive according to the invention is shown in FIG. Figure 6a and Figure 7a The difference between the lifting drive state in the embodiment is that, unlike the first fixing device 6 in Figure 6a The locked state in Figure 7a , the first fixing device 6 is unlocked and in the unlocking position PE. The frame base 3d adjoins the first fixing device 6 in the Z direction and is fixed thereto. The first and second fixing devices 6, 7 each comprise a toggle lever 20 for manually locking and unlocking the respective fixing device 6, 7. Figure 7a 3 shows the starting position 6P of the first fixing device 6 without displacement 6A when the lifting device 5 is retracted and without the stroke length 5aA. The frame base 3d is spaced apart from the edge of the mark 4bP of the track 4b in the longitudinal direction of the track 4b by the frame base spacing 4bP. The starting position 6P of the first fixing device 6 is spaced apart from the edge of the mark 4bP in the longitudinal direction of the track 4b by a distance 6P'.

[0077] exist Figure 7b In the case where the second fixing device 7 is fixed on each of the rails 4a, 4b, the lifting device 5 extends the stroke length 5aA1. Figure 7c In the embodiment, the first fixing device 6 moves relative to the starting position 6P to a new position 6P2 in the longitudinal direction of the rails 4a, 4b by a displacement 6A2 in the Z direction. Figure 7aIn the embodiment, the position 6P of the first fixing device 6 of the lifting drive is moved by a displacement 6A2 in the longitudinal direction of the rails 4a, 4b, i.e. in the direction R1, to a new position 6P2, while the position 7P2 of the second fixing device 7 in the longitudinal direction of the rail 4b in the negative Z direction at a distance 7a2 from the edge of the marking 4bP is moved relative to the lifting device 5 in the longitudinal direction of the rail 4b. Figure 7a and Figure 7c The retracted state in the first fixture 6 remains unchanged. The toggle lever 20 of the first fixture 6 is guided to the first guide plate 6b3 in the X direction, while the toggle lever 20 of the second fixture 7 is guided to the first guide plate 7a3 in the negative X direction. Figures 7a to 7c In the alternative embodiment of the lifting drive according to the invention shown, the toggle lever 20 for the two fastening devices 6 , 7 can be folded in the X direction or in the negative X direction.

[0078] Different from the lifting drive of the present invention, Figures 7a to 7c The state shown in Figure 7d to Figure 7f In each of the first fixing devices 6, the first fixing device 6 is stationary relative to the rails 4a, 4b, while the second fixing device 7 is displaced relative to the rails 4a, 4b in the longitudinal direction of the rails 4a, 4b in the Z direction. Figure 7d , the lifting device 5 is fully extended with a stroke length 5aA2, so that the first fixing device 6 is in position 6P2. The first fixing device 6 is locked and fixed on the track 4b, so that the first fixing device 6, the first end of the lifting device 5 and the frame base 3d and the cantilever device 2 remain stationary relative to the tracks 4a, 4b. The second fixing device 7 is unlocked and can therefore move in the Z direction in the R1 direction.

[0079] exist Figure 7e In the embodiment, the lifting device 5 is partially retracted, while the position 6P2 of the first fixing device 6 remains unchanged, so that when the lifting device 5 is fully extended, a shorter stroke length 5aA3 is generated relative to the stroke length 5aA2. The partially retracted lifting device fixed on the rail 4b at the first end leads to a position 7P3 of the second fixing device, which is moved in the direction R1, that is, in the Z direction, relative to the position 7P2 when the lifting device 5 is fully extended.

[0080] exist Figure 7f In FIG. 5 , it can be seen from the non-existent stroke length 5aA that the lifting device 5 is fully retracted without a stroke. The second fixing device 7 is spaced apart from the edge of the marking 4bP in the longitudinal direction of the track 4b by a distance 7Aa in the negative Z direction. During the extension movement of the lifting device 5 (see FIG. 5 ), the lifting device 5 is completely retracted without a stroke. Figure 7b ), the piston 5b moves relative to the lifting cylinder 5a in the negative Z direction. On the contrary, when the lifting device 5 is retracted (see Figure 7e), the piston 5b moves relative to the lifting cylinder 5a in the Z direction. When the second fixing device 7 is stationary relative to each of the rails 4a, 4b, the extension of the lifting device 5 causes the displacement of the frame base 3d and the cantilever device 2. During the retraction of the lifting device 5, the first fixing device and the frame base 3d and the cantilever device 2 are fixed relative to each of the rails 4a, 4b, and the lifting device can be fully retracted to start the next extension process.

[0081] Lift drive Figure 7a and 7f A comparison between the states in FIG. 1 and FIG. 2 shows that the frame base 3d and the cantilever device 2 have moved in the longitudinal direction of the rails 4a, 4b, i.e. in the Z direction, by a difference 3dA1-3dA, which corresponds to a displacement 6A2 of the first fixing device 6 and a substantially complete stroke length 5aA2. Repeating the above description of the lifting drive of the invention comprising the lifting device 5 and the first and second fixing devices 6, 7 Figure 7a -f shown in the retraction and extension cycle, until the predetermined displacement of the cantilever device in the forward or backward direction is achieved. As an alternative to extending when the first fixing device 6 is fixed, the displacement of the cantilever device 2 can also be achieved by retracting the lifting device when the second fixing device 7 is fixed.

[0082] exist Figure 8a The fixing device 6 in the unlocked state in the unlocked position PE is shown in a lateral cross-sectional view, which has a shape-fitting fixing on one end of the lifting device 5 (not shown) by means of a fixing layer 26. In the elastic device housing 27, an elastic device 28 in the form of several leaf springs or disc springs is arranged. For example, the elastic device has an elastic force of 300 kN. The elastic device housing 27 is connected to a guide housing 34, which buckles the upper part of the double T-shaped track 4b and can be displaced relative to the track 4b in the Z direction (starting from the plane of the drawing page). In the lower area of ​​the guide housing 34, a counter-pressure fixing layer 33 is arranged. When the fixing layer 26 abuts against the track 4b in the negative X direction, the counter-pressure fixing layer provides a counter-pressure in the positive Y direction to fix the fixing device 6 on the track 4b.

[0083] In order to increase the stability of the counter-pressure fixing layer 33 and thus increase the counter-pressure, the counter-pressure fixing layer and / or the guide shell is connected to the elastic device housing 27 via a counter-pressure arm 32. The elastic device 28 is connected to the fixing layer 26 in the form of a brake lining via a pretensioning device 29 and a pretensioning fixing device 29S. An unlocking lifting device 30 is provided between the pretensioning fixing device 29S and the top side of the elastic device housing 27, which includes an unlocking lifting device piston 30a and an unlocking lifting device cylinder 30b. The unlocking lifting device has an unlocking lifting device connector 31 on the lifting cylinder 30b for connecting to a hydraulic pipeline. In the unlocking position PE, the depth 28a of the elastic device 28 is, for example, 85.6 mm, which results in an air gap 26L1 of, for example, 7 mm between the bottom side of the fixing layer 26 and the top side of the rail 4b. In Figure 8a In the unlocked position, the piston 30a of the unlocking lifting device 30 extends in a certain way, so that the elastic device 28 is compressed in the Y direction, and the fixed layer 26 is thereby lifted from the track 4b, thereby forming an air gap 26L1. In the unlocked position, the fixing device 6 can therefore move relative to the track 4b in the Z direction or the negative Z direction.

[0084] exist Figure 8b The PV in the locked position is shown in FIG. Figure 8a The air gap 26L2 is 0 mm, which results in Figure 8a Compared with the depth 28A of, for example, 85.6 mm in the embodiment, the depth 28A is enlarged to, for example, 92.6 mm.

[0085] Fig. 9 The lifting drive of the present invention comprises two Figure 8a , 8b The fixing devices 6 and 7 shown are arranged at one of the two ends of the lifting device 5 including the piston 5a and the lifting cylinder 5b. The first fixing device 6 is in the locking position PV and the second fixing device 7 is in the unlocking position PE (see Figure 8a PE and Figure 8b The lifting device 5 is designed as a double-acting lifting device, so that the lifting device 5 can be extended by one hydraulic pipeline and can be retracted by another hydraulic pipeline.

[0086] For this purpose, the lifting cylinder 5b of the lifting device 5 is connected to a pressure source 35 in the form of a hydraulic source via a first connection A and a second connection B of the lifting device 5. In addition to the first and second connections A, B, the directional control valve 36 in the form of a 4 / 3 valve also includes further connections P and T in the form of a pressure connection P and a tank connection T. The directional control valve has three mechanically operable positions, wherein the connection P is connected to the connection A in the first position, and independently of this, the connection T is connected to the connection B, and in the intermediate position between P and T there is a pressure-free cycle, so that A and B are relieved of pressure to the tank, and in addition to the pressure-free cycle, it is also in a floating position, so that the directional control valve 36 is easy to move and operate by external forces. In the third position, the connection P is connected to the connection B, and independently of this, the connection A is connected to the connection T. The connection A is connected to the switching valve 37 via the first connecting line 36a and the first switching valve line 36A1. The connection B is connected to the switching valve 37 via the second connecting line 36b and the second switching valve line 36B1. Via the switching valve 37 , the first switching valve line 36A1 and the second switching valve line 36B1 are connected to the first fixing device 6 via the line 37A and to the second fixing device 7 via the line 37b, both via the joint 31 of the unlocking lifting device 30 connected to the first and second fixing devices 6 , 7 .

[0087] There is a first branch point V1 between the first connecting line 36a and the first conversion valve line 36A1, so that the joint A is not only connected to the conversion valve 37, but also connected to the first joint of the lift cylinder 5b through the first lift device line 36A2, for extending the piston of the lift device 5. The joint B is connected to the second joint of the lift cylinder 5b of the lift device 5 through the second connecting line 36b and the second line 36B2 of the lift device 5 via the second branch point V2, for retracting the piston 5a of the lift device 5.

[0088] Depending on whether the boom device 2 is to be moved or fixed, the first fixing device 6 is unlocked and the second fixing device 7 is locked, and vice versa. The locking and unlocking of the fixing devices 6, 7 occur alternately, whereby the connections A and B on the lifting cylinder 5b are controlled, thereby locking the corresponding locking devices 6, 7 that need to be locked in order to move the boom device 2 (not shown) to extend or retract the piston 5a. As an alternative to the forward movement of the boom device 2 in the forward direction R1, in order to achieve a backward movement in the negative R1 direction, the connections A and B leading to the fixing devices 6, 7 can be interchanged by the conversion valve 37. By this, the boom device 2 is moved in a simple manner in the forward or backward direction, that is, in the positive or negative Z direction, while complying with the existing safety conditions.

[0089] exist Fig.10The fixing device 6 which can be fixed to a fixing rail 40 having an axis 40A is shown in a top cross-sectional view, and has a shape-fitting fixing achieved by means of one or more fixing elements 46 abutting against the surface of the fixing rail 40. The fixing device 6 which can be fixed in a shape-fitting manner has an elastic device frame 47, wherein an elastic device 28 in the form of one or more leaf springs or disc springs is arranged in the elastic device frame 47. For example, the elastic device 28 can be composed of eight disc springs with a spring force of 14 kN. Between the elastic device 28 and the unlocking lifting device piston 30a guided in the unlocking lifting device lifting cylinder 30b of the unlocking lifting device 30, a counter-pressure element 48 in the form of a conical hollow cylinder is arranged, which is connected to the piston 30a of the unlocking lifting device 30 via at least one connecting web 44. Fig.10 In order to introduce a corresponding force via the piston of the unlocking lifting device 30 , the counterpressure element is connected to the piston 30 a of the unlocking lifting device 30 via two connecting webs 44 .

[0090] When the piston 30a is extended during the process of controlling the unlocking lifting device 30 by the joint 31 of the unlocking lifting device, the connecting web 44 presses the counterpressure element toward the elastic device 28, thereby releasing at least one fixed element 46 arranged between the counterpressure element 48 and the fixed rail 40. For this reason, when the piston 30a of the unlocking lifting device 30 is extended, Fig.10 The wedge-shaped fixing element 46 shown above the fixing rail 40 can be moved in the positive X direction, and, unlike the upper fixing element 46, the wedge-shaped fixing element 46 shown above the fixing rail 40 can be moved in the positive X direction. Fig.10 Another fixed element shown below the fixed rail 40 can be moved in the negative X direction. Here, the gap 48A between the counter-pressure element 46 and the elastic device frame 47 is increased compared to the retracted state of the piston 30a. The fixed element 46 is guided by the protrusion 47V in the elastic device frame 47, which produces a recess in the elastic device frame 47, which can be snapped into the protrusion 46V of the fixed element 46, and this guidance makes it possible for the fixed element 46 to not migrate in the negative Z direction and to be wedged between the fixed rail 40 and the counter-pressure element 48 when the fixed device 6 is unlocked.

[0091] In order to better separate the fixed element 46 when the piston 30A is extended to unlock the fixed device 6, a release element 45 is provided on the piston 30A next to the connecting web 44, which is stuck between the corresponding fixed element 46 and the surface of the fixed rail 40 so as to separate the fixed element from the surface of the fixed rail 40 and unlock the fixed device 6. As an alternative to the conical hollow cylinder, the back pressure element 48 can also be composed of a plurality of wedge-shaped elements that are not directly connected to each other. The elastic device frame 47 has a socket 43 for connecting one end of the lifting device 5 on opposite sides of the fixed rail 40. The lifting cylinder 30b that unlocks the lifting device 30 is connected to the elastic device frame 47 in a certain way, so that when the piston 30A is extended, the piston 30A can move relative to the elastic device frame 47 (in the negative Z direction). In order to generate a fixing force of, for example, 40 kN in the fixing force direction 46F, it can be used Fig.10 The arrangement of the fixing device 6 shown generates a fixing force of, for example, 133 kN in the direction 46F, which is generated by the fixing element 46 due to the contact on the fixing rail 40. In this case, the gap between the counterpressure element 48 and the elastic device frame 47 can have a width of, for example, 20 mm. For example, the fixing element 46 can be composed of three independent elements, which are at an angle of 120° to each other, in particular in the X / Y plane. When the unlocking lifting device 30 is hydraulically controlled, a pressure of, for example, 180 bar can exist at the joint 31 of the unlocking lifting device. The fixing rail 40 with a circular cross section can have a diameter of, for example, 60 mm.

[0092] Fig.11 Another embodiment of the lifting drive according to the present invention is shown, wherein the lifting drive comprises a lifting device 5 and a lifting device 5 as shown in FIG. Fig.10 The fixing device 6 shown in the figure serves as the fixing devices 6 and 7. The hydraulic control system for the fixing devices 6 and 7 and the lifting cylinder 5b of the lifting device 5 for extending or retracting the piston 5a corresponds to the following Fig. 9 Therefore, refer to the hydraulic circuit shown in Fig. 9 The hydraulic circuit description in Fig.11 The hydraulic circuit in.

[0093] Different from Fig. 9In the layout shown, the track 4b is connected to the fixed track 40 by at least one connecting component 41, on which the lifting cylinder 5 and the clamping head 49 are guided at one end of the lifting device 5, and the frame base 3d is guided at the other end of the lifting device 5 opposite to this end. The axis 40A of the fixed track 40 is parallel to the track 4b, wherein the fixed track 40 is connected to the track 4b by the connecting component 41 in a certain way, so that the fixing effect of one or both of the fixing devices 6, 7 leads to the fixing of one end and / or the other end of the lifting device 5 relative to the track 4b. Based on the fixed track 40 additionally installed on the track, a conventional lifting drive can be used to move the track-guided cantilever device 2, wherein a clamping head 49 is installed at one end, which is arranged in a certain way relative to the clamping device 42, such that when the clamping head 49 abuts against the clamping device 42, the cantilever device can move in the Z direction when the piston 5a is extended. As an alternative, according to the present invention, Fig.10 As shown, when the piston 30a of the unlocking lifting device 30 is retracted, the fixing device 7 can be fixed on the fixing rail 40 at the locking position PV, and the fixing device 7 can transmit its fixing position relative to the rail 4b to the clamp 49 and then to one end of the lifting device 5 through the first coupling element 50 and the second coupling element 51. For this purpose, one end of the first coupling element 50 is connected to the clamp, and the other end of the first coupling element 50 opposite to this end is connected to the base 43 of the fixing device 7. The lifting cylinder 30b of the fixing device 7 is connected to one end of the second coupling element 51, and the other end of this second coupling element is connected to the clamp 49. Correspondingly, the base 43 of the fixing device 6 is connected to one end of the third coupling element 52, wherein the other end opposite to this end is connected to the frame base 3d. One end of the fourth coupling member 53 is also connected to the frame base 3d, wherein the other end of the fourth coupling member opposite to this end is connected to the lifting cylinder 30B of the unlocking lifting device 30 of the fixing device 6. As an alternative to this, each of the fixing devices 6, 7 can also be connected to one end or the other end of the lifting device 5 by only one coupling element. The two fixing devices 6, 7 are each unlocked and locked to move or brake or fix the cantilever device 2 (not shown). Through the fixing rail 40 connected to the rail 4b via one connecting component 41 or multiple connecting components 41, the fixing devices 6, 7 can each play a fixing / braking or supporting role on each of the two ends of the lifting device 5 relative to the rail 4b.

[0094] Unless otherwise stated or not permitted for technical reasons, the features of the invention described with reference to the illustrated embodiments, e.g. Figure 4a , 4b The manual lifting device of the first fixing device 6 may also exist in other embodiments of the present invention, for example Figure 5a , 5bThe hydraulic lifting device of the first fixing device 6 in the embodiment of the present invention makes the first fixing device include both the manual lifting device and the hydraulic lifting device.

[0095] Reference numerals list

[0096] 1 Bridge

[0097] 1a Bridge surface

[0098] 1b Bridge hollow box

[0099] 2 Cantilever device

[0100] 3, 3' main frame

[0101] 3" upper load bearing device

[0102] 3"' lower load bearing device

[0103] 3a-3c, 3'a-3'c pillars

[0104] 3d, 3'd frame base

[0105] 3dA, 3dA1 cantilever device displacement

[0106] Q1, Q2, Q3 cross braces

[0107] 4a, 4b, 4'a, 4'b tracks

[0108] 4a1, 4b1-4b4 track recess

[0109] 4b' Track recess width

[0110] 4bP track marker

[0111] 5, 5' lifting device

[0112] 5a Piston

[0113] 5b Lifting cylinder

[0114] 6 First fixed device

[0115] 6a, 6b first fixed component

[0116] 6a1, 6b1 substrate

[0117] 6a2, 6b2 holding plate

[0118] 6a3, 6b3, 7a3 first guide plate

[0119] 6a4, 6b4 Second guide plate

[0120] 6a5, 6b5, 7b5 snap-on / clip-on elements

[0121] 6b' Pawl Width

[0122] 6b'Substrate recess width

[0123] 6b"' Width of the recessed portion of the retaining plate

[0124] 6a3' First guide plate recess

[0125] 6P, 6P1, 6P2 The position of the first fixing device relative to the track

[0126] 6A, 6A1, 6A2 Displacement of the first fixing device relative to the track

[0127] 7 Second fixing device

[0128] 7a, 7b second fixed component

[0129] 7a3 First guide plate

[0130] 7P, P2, 7P3 The position of the second fixing device relative to the track

[0131] 7A, 7A2, 7A3 Displacement of the second fixing device relative to the track

[0132] 8. Belly

[0133] 9 First connecting element

[0134] 10 First connecting plate

[0135] 11 Second connecting plate

[0136] 12 Lock

[0137] 13 Locking pin

[0138] 14 Third connecting plate

[0139] 15 Second connecting element

[0140] 16 Through Holes

[0141] 18. Fixture

[0142] 18' Clamp Position Relative to Web Plate

[0143] 19 fixture recess

[0144] 19', 19" guide

[0145] 20 toggle lever

[0146] 21a, 21b Lifting cylinder of lifting device

[0147] 22a, 22b base socket

[0148] 23a, 23b Second flange of lifting device

[0149] 24a, 24b first flange of the lifting device

[0150] 25a Through hole for baseplate socket

[0151] 26 Fixed layer

[0152] 26L1 unlocked position air gap

[0153] 26L2 Locking position air gap

[0154] 27 Elastic device housing

[0155] 28 Elastic device

[0156] 28A Spring Depth

[0157] 29 Pre-tensioning device

[0158] 29S Pre-tensioning device

[0159] 30 Unlock the lifting device

[0160] 30a Unlocking piston of lifting device

[0161] 30b Unlock the lifting cylinder of the lifting device

[0162] 31 Unlock the lifting device connector

[0163] 32 Counterpressure Arm

[0164] 33 Back pressure fixed layer

[0165] 34 Guide housing

[0166] 35 Stressors

[0167] 36 Directional valve

[0168] 36A First connecting pipeline

[0169] 36B Second connecting pipeline

[0170] 36A1 conversion valve first pipeline

[0171] 36B1 conversion valve second pipeline

[0172] 36A2 lifting device first pipeline

[0173] 36B2 lifting device second pipeline

[0174] 37 Switching valve

[0175] 37A Pipeline of the first lifting device

[0176] 37B Pipeline of the second lifting device

[0177] 40 Fixed track

[0178] 40A Axis of fixed track

[0179] 40F Braking force direction

[0180] 41 Connecting components

[0181] 42 snap-fit ​​device

[0182] 43 Base

[0183] 44 Connecting web

[0184] 45 Release element

[0185] 46 Fixed components

[0186] 46 Fixed force direction

[0187] 46V Protrusion of fixed component

[0188] 47 Elastic device frame

[0189] 47V Elastic device frame protrusion

[0190] 48 Back pressure element

[0191] 48A Clearance between the back pressure element and the elastic device frame

[0192] 49 Card head

[0193] 50 first coupling element

[0194] 51 Second coupling element

[0195] 52 Third coupling element

[0196] 53 Fourth coupling element

[0197] A The first joint of the lifting device

[0198] B Second joint of lifting device

[0199] P Pressure connector

[0200] PE unlock position

[0201] PV lock position

[0202] PA Distance between unlocked position and locked position

[0203] R1 Cantilever unit forward direction

[0204] T tank connector

[0205] V1 First branch point

[0206] V2 Second branch point

Claims

1. A lifting drive for a rail-guided cantilever device (2), in particular for bridge construction, wherein the cantilever device (2) comprises a main frame (3, 3') guided by at least one rail (4a, 4b, 4'a, 4'b) for accommodating at least one formwork, - having a lifting device (5, 5'), wherein a first end of the lifting device (5, 5') is designed to be connected to the main frame (3, 3'), and when the first end of the lifting device (5, 5') is connected to the main frame (3, 3'), a second end of the lifting device (5, 5') opposite to the first end is movable relative to the main frame (3, 3'), - having a first fixing device (6) connected to the first end of the lifting device (5, 5') and designed to fix the first end of the lifting device (5, 5') relative to the at least one rail (4a, 4b, 4'a, 4'b), and - having a second fixing device (7) connected to the second end of the lifting device (5, 5') and designed to fix the second end of the lifting device (5, 5') relative to the at least one rail (4a, 4b, 4'a, 4'b), wherein The first and second fixing devices (6, 7) can both be fixed relative to the at least one rail (4a, 4b, 4'a, 4'b) in a reversibly separable manner.

2. A lifting drive according to claim 1, wherein the lifting device (5, 5') is fixed relative to the at least one track (4a, 4b, 4'a, 4'b) in a certain way so that - when the first end of the lifting device (5, 5') is lifted and lowered in one direction relative to the at least one track (4a, 4b, 4'a, 4'b) to move the main frame relative to the at least one track (4a, 4b, 4'a, 4'b) (6A1, 6A2), the second fixing device (7) is fixed relative to the at least one track (4a, 4b, 4'a, 4'b), and - When the second end of the lifting device (5, 5') moves up and down relative to the at least one rail (4a, 4b, 4'a, 4'b) in the one direction, the first fixing device (6) is fixed relative to the at least one rail (4a, 4b, 4'a, 4'b).

3. The lifting drive according to claim 1 or 2, wherein: The main frame (3, 3') is guided by the at least one track (4a, 4b, 4'a, 4'b) via roller bearings or rolling bearings, and the first and second fixing devices (6, 7) are designed to correspond to or be identical to each other.

4. A lifting drive according to any one of the above claims, wherein the first and second fixing devices (6, 7) can have the characteristic of being fixed relative to the at least one rail (4a, 4b, 4'a, 4'b) by shape fit and / or press fit, in particular, can be fixed on the rail (4a, 4b, 4'a, 4'b) and / or on at least one fixed rail (40) connected to the rail.

5. The lifting drive according to claim 4, wherein: At least one of the fixing devices (6, 7) comprises at least one fixing layer (26) or a fixing element (46), which is used to abut against the at least one track (4a, 4b, 4'a, 4'b) or the at least one fixing track (40) connected to the track in a fixed state, and an unlocking lifting device (30) is arranged to interact with the fixing layer (26) or the fixing element (46) and with an elastic device (28), so that when the unlocking lifting device (30) is retracted and / or deactivated, the fixing layer (26) or the fixing element (46) abuts against the at least one track (4a, 4b, 4'a, 4'b) or the at least one fixing track (40) connected to the track through the elastic device (28), so as to fix the fixing device (6, 7).

6. The lifting drive according to any one of claims 4 or 5, wherein: At least one of the fixing devices (6, 7) includes at least one snap-fit / snap-on element (6a5, 6b5, 7b5), for example in the form of a ratchet or a foldable hook, and the at least one rail (4a, 4b, 4'a, 4'b) or the fixing rail (40) includes a recess (4b1-4b3) and / or a groove in its longitudinal direction, which can be snapped into by the at least one snap-fit / snap-on element (6a5, 6b5, 7b5) so as to fix the fixing device (6, 7) relative to the at least one rail (4a, 4b, 4'a, 4'b).

7. The lifting drive according to claim 6, wherein: The stroke length (5aA1, 5aA2) of the lifting device (5, 5') is selected to be greater than or equal to the distance (4bA) between adjacent recesses (4b1, 4b2; 4b2, 4b3) and / or grooves in the longitudinal direction of the at least one rail (4a, 4b, 4'a, 4'b) or the fixed rail (40), so that when the fixing device (6, 7) is fixed relative to the at least one rail (4a, 4b, 4'a, 4'b), the stroke length (5aA1, 5aA2, 5aA3) is sufficient to move the main frame (3, 3') by the distance (4bA) between adjacent recesses (4b1, 4b2; 4b2, 4b3) and / or grooves.

8. A lifting drive according to claim 6 or 7, wherein the fixing device (6, 7) includes at least one manual, hydraulic, pneumatic or electric lifting device (18-20; 21a-24a; 21b-24b) for performing linear translation movement, which is designed to ensure that the at least one snap-on / snap-on element (6a5, 6b5, 7b5) is reversibly snapped into a recess (4b1-4b3) or groove of the at least one rail (4a, 4b, 4'a, 4'b) or the fixing rail (40).

9. A lifting drive according to any one of claims 6 to 8, wherein the cantilever device (2) is guided by two or four rails (4a, 4; 4'a, 4'b) arranged parallel to each other, and the first and second fixing devices (6, 7) include one pawl (6a5, 6b5) for each rail (4a, 4b, 4'a, 4'b), so that each rail (4a, 4b, 4'a, 4'b) corresponds to a total of two pawls (6a5, 6b5, 7b5) of the first and second fixing devices (6, 7), and the lifting drive of the cantilever device (2) includes a total of either two rails (4a, 4; 4'a, 4'b) and four pawls (6a5, 6b5, 7b5), or four rails (4a, 4; 4'a, 4'b) and eight pawls (6a5, 6b5, 7b5).

10. A lifting drive according to claim 9, wherein the pawls (6a5, 6b5) of the respective first fixing devices (6) and / or second fixing devices (7) of the two rails, which are opposite to each other in a direction perpendicular to the longitudinal direction of each rail (4a, 4b, 4'a, 4'b), are connected by a web (8).

Images