slipform paver

Abstract

According to the road construction machinery of the present invention, a mechanical frame supported by a traveling mechanism is provided on the mechanical frame, on which a working device is disposed having a working means fastened to a bracket, the bracket being guided on a linear guide. The bracket is movable in a lateral direction by rotating a cable roller. The road construction machinery is characterized by a cable roller having first and second roller halves, one end of a cable being fastened to one roller half and the other end of the cable being fastened to the other roller half, and a cable winch capable of assuming a first operating mode in which the first and second roller halves are connected to each other, such that the bracket is moved by rotating the first and / or second rollers. The cable winch is capable of assuming a second operating mode in which the first and second roller halves are capable of rotating in opposite directions in at least one rotational direction, such that cable tension can be adjusted by rotating one roller half relative to the other roller half.

Description

Technical Field

[0001] This invention relates to road construction machinery, and more specifically to a slipform paver or curing machine for newly manufactured concrete layers, the road construction machinery comprising a mechanical frame supported by a traveling mechanism, and an operating device mounted on the mechanical frame. Background Technology

[0002] Road construction machinery includes slipform pavers, which have slipforms for paving concrete. Known slipform pavers allow for particularly economical concrete paving. The concrete to be paved is placed in front of the slipform paver in the working direction. To distribute the concrete evenly across the entire paving width, the slipform paver has a distribution device arranged in front of the slipform in the working direction.

[0003] Slipform pavers are known, and their distribution device includes a pusher that can move laterally in the working direction and by means of the pusher can distribute concrete in the lateral direction. The pusher (also called a spreader) is fastened to a bracket that is guided on a linear guide extending laterally in the working direction.

[0004] To move the bracket, a traction cable can be provided fastened to the side of the bracket. This traction cable can be wound or unwound by means of a cable winch located on the longitudinal side of the slipform paver, allowing the bracket with the spreading plow to move in the lateral direction. In an alternative embodiment, the bracket can be connected to a cable deflected on one longitudinal side of the slipform paver, the free end of which is fastened to a cable roller of a cable winch on the other longitudinal side of the mechanical frame, such that the bracket can be moved in the lateral direction by rotating the cable roller.

[0005] To produce a particularly smooth concrete surface, slipform pavers can also have a smoothing device arranged behind the slipform in the working direction. Slipform pavers are known to have a smoother attached to a bracket guided on a linear guide extending laterally. Two traction cables can be provided to move the bracket, and these cables are wound and unwound by means of a cable winch. Alternatively, only one cable winch can be provided, with the cable deflected on one side of the slipform paver.

[0006] Known curing machines for curing newly manufactured concrete layers can also have working devices that can move laterally. In the case of a curing machine, the working device can be a texturing device for texturing the newly manufactured concrete, and the working device can be a brush element that can move laterally to the working direction. However, the working device can also be a spraying device for spraying newly manufactured concrete with liquid, and the working device is a nozzle that can move laterally to apply the liquid.

[0007] Road construction machinery is known to allow for variable setting of different working widths. The mechanical frames of these road construction machines have telescopic frame components and / or the mechanical frames are designed to allow frame components to be inserted into or removed from existing mechanical frames to increase the working width.

[0008] EP 1 068 397 B1 discloses a slipform paver with a variable working width, the slipform paver having a distribution device as a working device, the working device (spreading plow) moving laterally by means of two cables wound and unwound on cable winches arranged on both sides of the mechanical frame. EP 2 886 717 A1 discloses a curing machine with a working device having a nozzle as the working device.

[0009] In road construction machinery with the aforementioned types of working devices, there is a problem of setting and maintaining the cable tension required for the normal operation of the working device. Practice shows that if the construction machinery is not operated for an extended period, the cable tension may decrease. However, the cable tension may also decrease overnight, for example, due to temperature changes, necessitating re-tightening of the cable the following day. Furthermore, when the working width of the road construction machinery changes, the free length of the cable must be adjusted. For this purpose, the cable must be wound or unwound on the cable rollers, and the cable tension must be readjusted.

[0010] In road construction machinery with two cable winches, the working width can be varied and cable tension adjusted by operating the winches to wind or unwind the cable. However, a disadvantage of this embodiment is that it requires two separate cable winches. In embodiments with only one cable winch, a cable clamp can be mounted on a bracket to release the cable. However, a disadvantage is that the force required to manually tension the cable is relatively large. Tensioning the cable also proves to be relatively time-consuming. Furthermore, releasing the cable clamp and tensioning the cable requires operation in a hazardous area immediately in front of the road construction machinery. Summary of the Invention

[0011] The purpose of this invention is to provide a road construction machine, particularly a slipform paver or curing machine for newly manufactured concrete layers, which has the above-mentioned type of working device, wherein cable tensioning is easier, faster and safer.

[0012] According to the invention, this objective is achieved by the features of the independent claim. The dependent claims relate to preferred embodiments of the invention.

[0013] According to the invention, the road construction machinery, particularly for slipform pavers or curing machines for newly manufactured concrete layers, has a mechanical frame supported by a traveling mechanism, on which a working device is mounted. This working device has a working arm movable in a direction extending transversely to the working direction, the working arm being secured to a bracket guided on a linear guide extending transversely to the working direction. The bracket is connected to a cable deflected on one longitudinal side of the mechanical frame, its free end secured to a cable roller of a cable winch on the other longitudinal side of the mechanical frame, such that the bracket can be moved transversely by rotating the cable roller. The linear guide is understood to be any component that allows the bracket to be guided in the transverse direction, such as guide rods, profile track systems, tongue and groove systems, etc. The bracket is understood to be any component guided in the transverse direction. The bracket can be guided by sliding or by means of rollers.

[0014] The road construction machinery according to the invention is characterized in that the cable roller has a first roller half and a second roller half, one end of the cable is fastened to one roller half, and the other end of the cable is fastened to the other roller half. In this document, "a cable" is also understood to be a cable composed of multiple cables or cable segments connected to each other in a manner capable of transmitting tension. For example, the free ends of two cable segments can be connected to each other by fastening them to a bracket, thereby forming a cable.

[0015] The cable winch is designed to operate in a first operating mode. In this first operating mode, the first and second roller halves are connected or coupled to each other, such that rotation of the first and / or second roller halves in one direction or the other causes movement of the carriage in one direction or the other. This first operating mode corresponds to normal operation, in which the carriage with the working device moves in the lateral direction. In this operating mode, the connection between the first and second roller halves does not need to be rigid. The decisive factor is that if the drive is only on one of the two roller halves, the connection allows the necessary torque to be transmitted from one roller halves to the other so that the carriage can be moved left or right under load during operation of the road construction machinery. The respective roller halves can be driven by hydraulic, pneumatic, or electric drive units.

[0016] The cable winch is also designed to accommodate a second operating mode. In this second operating mode, the first and second roller halves can rotate in opposite directions in at least one rotational direction, allowing cable tension to be adjusted by rotating one roller half relative to the other. To allow one roller half to rotate relative to the other, one of the two roller halves can remain in position while the other rotates. Each roller half can be driven by a hydraulic, pneumatic, or electric motor. The drive unit for the second operating mode can be the same as the drive unit for the first operating mode. However, a separate drive unit can also be provided.

[0017] Therefore, in the first operating mode, the two roller halves form a "single cable roller," by which the cable can be wound up or unwound without changing the free cable length. However, in the second operating mode, the two roller halves form "two cable rollers," allowing the free cable length to be changed. Thus, the two roller halves can also be understood as two separate cable rollers that can be connected to or disconnected from each other; that is, they can be separated from each other.

[0018] One embodiment of the cable winch specifies that a first roller half has at least one first connecting element, and a second roller half has at least one second connecting element, said at least one first connecting element and at least one second connecting element being designed such that, in a first operating mode, a non-forced drive connection is established between the first connecting element and the second connecting element. The connecting element can be, for example, a clutch disc, which allows the non-forced drive connection to transmit the torque required to move the carriage. The non-forced drive connection can be released because at least one of the two roller halves moves axially, such that the clutch disc is arranged at a distance from each other. A suitable adjustment mechanism can be provided for this purpose. This adjustment mechanism can have, for example, an adjusting screw. The roller halves can also be adjusted, for example, using a piston / cylinder arrangement. However, the clutch discs can also be designed such that they function as slipper clutches, but the transmittable torque is still large enough that the carriage can move in the first operating mode and the roller halves can rotate in the opposite direction in a second operating mode. In this case, an adjustment mechanism is not required. The connecting element can be an integral part of the roller half or form a separate component.

[0019] An alternative embodiment specifies that the first roller half has at least one first connecting element, and the second roller half has at least one second connecting element, wherein the at least one first connecting element and the at least one second connecting element are designed such that a forced transmission connection is established between the first connecting element and the second connecting element in a first operating mode. The connecting elements may have, for example, locking pawls or external or internal teeth that engage in the first operating mode and disengage in the second operating mode. In this embodiment, an adjustment mechanism for axially moving the roller half can be provided for releasing the connecting elements.

[0020] In a particularly preferred embodiment, the cable winch is designed such that the first and second cable rollers form a clutch that operates only in one direction of rotation, so that the first and second roller halves can rotate only in one direction. This direction of rotation is preferably the direction in which one roller half must rotate to tension the cable while the other roller is held in place.

[0021] In the most preferred embodiment, the first roller half may have at least one locking element, and the second roller half may have at least one spring-biased locking pawl, which engages in a locking manner with the at least one locking element. The two roller halves can rotate relative to each other to tension the cable, and because the cable system is held under a set pretension, the locking effect in one direction of rotation favors tension. The required torque can be easily transmitted in one direction of rotation. Torque transmission in the other direction of rotation (i.e., the opposite of the locking effect) can be achieved by rigidly connecting the two roller halves to each other. The rigid connection can be achieved, for example, by screws or bolts or other locking elements, which can be electromagnetically, hydraulically, or pneumatically actuated. However, locking is not necessary if the flywheel is designed such that the spring preload of, for example, the locking pawl is designed to be such that the two roller halves remain together in the other direction of rotation to achieve the desired torque transmission.

[0022] The first roller half may have multiple locking elements circumferentially distributed around the rotation axis of one of the two roller halves at predetermined intervals, and the other roller half may have multiple locking pawls circumferentially distributed around its rotation axis at predetermined intervals. This allows one roller half to be connected to the other roller half at different intermediate positions. A particularly large number of intermediate positions can be achieved, wherein the predetermined intervals between the locking elements of one roller half and the predetermined intervals between the locking pawls of the other roller half are matched to each other in a vernier division (nonius) manner.

[0023] To completely separate the first and second roller halves, in a particularly preferred embodiment, the two roller halves can be axially displaced relative to each other between a first position and a second position. In the first position, at least one locking pawl engages in at least one locking element. In the second position, at least one locking pawl is not engaged in at least one locking element. If the two roller halves are completely separated from each other, the cable can be wound up or unwound from one or both cable rollers as the working width increases or decreases. A suitable adjustment mechanism can be provided for the axial displacement of the roller halves. This adjustment mechanism can have, for example, an adjusting screw. However, the roller halves can also be adjusted, for example, using a piston / cylinder arrangement.

[0024] To tension or unwind the cable, only movement of the two roller halves relative to each other is required. For this purpose, either or only one of the two roller halves is rotatable, and a single rotary actuator can be provided on one side of the cable roller, or multiple rotary actuators can be provided on both sides of the cable roller. Preferably, only one rotary actuator is provided to drive the first roller half, which can be arranged inside the machine frame facing away from it. Therefore, the rotary actuator can be secured to the machine frame.

[0025] Another embodiment provides a locking device designed to lock one of the two roller halves relative to the mechanical frame. If only one of the two roller halves is driven, the second roller half can be locked by the locking device.

[0026] The locking device may include a perforated body on one of the two roller halves and a fixed frame with drilled holes. The perforated body has holes circumferentially arranged around the axis of rotation of the roller half, and the fixed frame is assigned to the roller half such that a bolt for locking the roller half can be pushed into one of the holes through the drilled holes in the frame. However, locking can also be achieved by other locking devices, such as a braking device acting on the cable roller or its roller half.

[0027] Road construction machinery can be a slipform paver, whose mechanical frame has a right-hand frame section extending in the working direction and a left-hand frame section extending in the working direction, with a slipform arranged between the right-hand frame section and the left-hand frame section, and the working device is a distribution device arranged in front of the slipform in the working direction for distributing the concrete to be paved in a direction transverse to the working direction, and the working device is a pusher that can move in the transverse direction.

[0028] Road construction machinery can also be slipform pavers, whose mechanical frame has a right-hand frame section extending in the working direction and a left-hand frame section extending in the working direction, with a slipform arranged between the right-hand frame section and the left-hand frame section, and the working device is a smoothing device arranged behind the slipform in the working direction for smoothing newly manufactured concrete, and the working device is a smoother that can move in a direction transverse to the working direction.

[0029] In addition, road construction machinery can also be a curing machine for newly manufactured concrete layers, a texturing device for texturing newly manufactured concrete, and a brush element that can move in a direction extending laterally to the working direction, or a spraying device for spraying newly manufactured concrete with liquid, and a nozzle that can move laterally to the working direction.

[0030] The advantages of this invention are particularly evident when the mechanical frame and linear guide of the working device of road construction machinery are designed for variable settings of different working widths. Therefore, there is not only the problem of setting cable tension, but also the problem of adjusting the free cable length to different working widths. The required cable tension can be quickly and easily established by rotating one or both roller halves. The cable supply can be distributed across both roller halves. Particularly advantageous is that the cable supply is not evenly distributed across both roller halves, but rather the majority of the cable is supplied across one roller halves. The cable can be tensioned outside the danger zone on one side of the road construction machinery. The cable can be manually retensioned on only one side, or retensioned on only one side by a single rotary drive. Cable tensioning and the setting of the appropriate free cable length can also be partially or fully automated through suitable drive units and adjustment mechanisms. Attached Figure Description

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of a slipform paver with variable working width, which serves as an example of road construction machinery. The slipform paver has front working equipment and rear working equipment in the working direction.

[0033] Figure 2 This is a schematic diagram of a curing machine for newly manufactured concrete layers with variable working width, serving as an example of road construction machinery with operating equipment;

[0034] Figure 3A , Figure 3B and Figure 3C This is a schematic diagram of a first embodiment of a cable winch for a working device, illustrating its functional principle;

[0035] Figure 4A and Figure 4B This is a schematic diagram of a second embodiment of a cable winch;

[0036] Figure 5A One of the two roller halves of the cable roller of the cable winch is shown in a plan view of the third embodiment of the cable roller;

[0037] Figure 5B This is a plan view of the other half of the two roller halves of the cable roller of the cable winch in the third embodiment; and

[0038] Figure 5C The locking pawl of the cable roller in the third embodiment is shown. Detailed Implementation

[0039] Figure 1 A highly simplified schematic diagram of a slipform paver, as an example of self-propelled construction machinery, is shown.

[0040] The slipform paver has a mechanical frame 1 supported by a chassis 2. The chassis 2 includes a left front chain drive 3A and a right front chain drive 3B in the working direction I, and a left rear chain drive 4A and a right rear chain drive 4B in the working direction. The chain drives are secured to the mechanical frame via left front lifting devices 5A and right front lifting devices 5B, and left rear lifting devices 6A and right rear lifting devices 6B.

[0041] The mechanical frame 1 includes a left frame section 7A, a right frame section 7B, and a middle frame section 8 in the working direction I. The middle frame section 8 can be extended or shortened to change the working width of the slipform paver. For this purpose, a piston / cylinder arrangement structure 9, shown only in outline, can be provided, or individual frame members 8A can be inserted into or removed from the middle frame section 8.

[0042] Between the outer left frame portion 7A and right frame portion 7B, a slipform 10 extending transversely to the working direction is arranged for producing a concrete layer for road use. The slipform 10 also has a variable working width, for example, by inserting and removing individual slipform segments 10A.

[0043] In addition, the slipform paver includes a first working device 11 at the front in the working direction I and a second working device 11' at the rear in the working direction I. The first working device 11 at the front is arranged in front of the slipform 10, and the second working device 11' at the rear is arranged behind the slipform in the working direction.

[0044] Both the first working device 11 at the front and the second working device 11' at the rear include a longitudinal guide 12 extending transversely to the working direction and a cable system 14 for moving the bracket, on which the bracket 13 is guided transversely. The same reference numerals are used for corresponding portions of the working devices. The working width of the longitudinal guide 12 can also be changed by inserting and removing the longitudinal guide portion 12A. The cable system 14 of both working devices has a cable 15 extending transversely, which is wound or unwound by a cable winch 16 on the left side of the working direction I and deflected on a deflection roller 17 on the right side of the working direction I. The bracket 13 is secured to the cable 15. The first working device 18 and the second working device 18' are secured to the bracket 13.

[0045] If the working width of the slipform paver changes, the widths of the first working device 11 and the second working device 11' must be adjusted. This requires changing the free cable length of the cable system 14. Additionally, the cable 15 must be tensioned or re-tensioned to ensure the cable system 14 functions correctly. The structure and function of the cable system 14 are described in detail below.

[0046] The first working device 11 at the front is a distribution device for distributing the concrete to be paved in a direction extending transversely to the working direction across the entire working width, wherein the first working device 18 is a pusher, also known as a spreading plow. The second working device 11' at the rear is a smoothing device for smoothing the newly manufactured concrete, and the second working device 18' is a smoother.

[0047] Figure 2 A curing machine for newly manufactured concrete layers is shown as an example of a self-propelled construction machine with working devices. Components corresponding to slipform pavers are indicated by the same reference numerals. In the case of the curing machine, the third working device 11” can be a texturing device for texturing the newly manufactured concrete, wherein the third working device 18” is a brush element that can move in a direction extending transversely to the working direction I. However, the third working device 11” can also be a spraying device for spraying the newly manufactured concrete with liquid, wherein the third working device 18” is a nozzle that can move in the transverse direction.

[0048] Figure 3A , 3B The diagram above (3C) shows a simplified schematic of a first embodiment of a cable winch 16 in a cable system 14. The cable winch 16 has a cable roller 19, which includes a first roller half 20 and a second roller half 21. The first roller half 20 and the second roller half 21 are fastened to a mechanical frame 1 such that they can rotate about a common axis of rotation 22. Figure 3A The cable winch 16 is shown in the first operating mode. Figure 3CThe cable winch is shown in the second operating mode. Figure 3B This shows a view of the end face of the cable roller 19 as viewed from the direction opposite to the working direction I.

[0049] The first roller half 20 is driven by a drive unit 23 mounted on the mechanical frame 1. The drive unit 23 may be, for example, a hydraulic motor or an electric motor.

[0050] Both the first roller half 20 and the second roller half 21 have a first connecting element 20A and a second connecting element 21A on their end faces, which in this embodiment are clutch discs with clutch linings. The two roller halves 20 and 21 elastically apply prestress by abutting against each other in the axial direction, resulting in the clutch discs pressing against each other. During the operation of the road construction machinery, the torque that can be transmitted by the clutch disc is sufficient to transport the carrier 13. The transmittable torque is determined by the design of the clutch disc and the contact pressure.

[0051] The free end of the cable 15, deflected on the deflection roller 17, is secured to the cable roller 19 in the opposite direction. The free end of the upper cable segment ( Figure 3B ) Secure to the first roller half 20 ( Figure 3A ), and the free end of the lower cable segment ( Figure 3B Secure to the second roller half 21 ( Figure 3A This causes the upper cable segment to wind onto the first roller half 20 and the lower cable segment to unwind from the second roller half 21 when the cable roller 19 rotates clockwise A (as can be seen from a plan view of the cable roller viewed from the direction opposite to the working direction I). Therefore, the bracket 13 fastened to the upper cable segment, together with the first working device 18, the second working device 18', and the third working device 18”, is positioned as shown by arrow a (…). Figure 1 , Figure 3A , Figure 3B From right to left (viewed from the direction of work) Figure 1 The cable roller can move in the opposite direction. However, the bracket can also be secured to the lower cable segment, thus reversing the direction of movement. The counterclockwise rotation (B) of the cable roller causes the working device to move from left to right (viewed in the working direction) in the direction of arrow (b). Therefore, the working device can move in two directions, a and b, which corresponds to the first operating mode.

[0052] To tension the cable 15, the cable winch 16 has a locking device 24 for fastening to a frame 1A outside the mechanical frame 1. In this embodiment, the locking device has a hydraulically, pneumatically, or electromagnetically actuated locking element 24A, such as a bolt, which can be displaced. On the outer side, the second roller half 21 has a perforated body 25 with holes 25A arranged circumferentially around its axis of rotation 22. The locking element 24A can be engaged into the perforated body 25 by pushing forward through a drilled hole 1AA in the frame 1A to attach the second roller half 21 to the fixed frame 1A. Instead of a locking device with an automatically actuated locking element, the bolt can also be manually pushed through the drilled hole 1AA into one of the holes 25A for locking.

[0053] To set the second operating mode, the second roller half 21 is locked by the locking device 24. Figure 3C In order to tension cable 15 in the second operating mode, the first roller half 20 rotates clockwise A via drive unit 23, while the second roller half 21 remains in place. The two roller halves 20, 21 act as a slip clutch. Figure 3C This corresponds to the second operating mode.

[0054] To allow the free cable length to adapt to a reduced or increased working width, the second roller half 21 is locked, and the first roller half 20 rotates clockwise A or counterclockwise B, which corresponds to the second operating mode.

[0055] A control unit 26 is provided to control the drive unit 23 and the locking device 24. Figure 3A The control unit 26 may be a component of the central control unit of a road construction machine (not shown). The drive unit 23 and locking device 24 are connected to the control unit 26 via control lines 23A and 24C. The control unit 26 may be configured to perform the various method steps for tensioning the cable or adjusting the length of the free cable completely automatically.

[0056] Figure 4A and Figure 4B An alternative embodiment is shown in which the connecting element does not create a non-forced drive connection, but rather a forced drive connection; the corresponding components are indicated by the same reference numerals. In this embodiment, the first connecting element 20A of the first roller half 20 has a locking pawl 20AA (only when...). Figure 4A and Figure 4B (shown in outline) The locking pawl 20AA engages in a corresponding groove 21AA provided on the second roller half 21, thereby creating a forced drive connection.

[0057] In an alternative embodiment, the cable winch has an adjustment device 27 designed to allow the first roller half 20 to move axially relative to the second roller half 21. The adjustment device 27 may include a hydraulic, pneumatic, or electromagnetic drive, such as a piston / cylinder arrangement, connected to the control unit 26 via a control line 27A. The control unit 26 may also be configured to perform the various method steps for tensioning the cable or adjusting the length of the free cable completely automatically. However, the adjustment device 27 may also include, for example, a manually operable adjustment screw.

[0058] In order to tension cable 15, control unit 26 actuates adjustment device 27 so that the first roller half 20 moves from the first position ( Figure 4A Move to the second position. Figure 4B In the first position, the locking pawl 20AA engages in the axial direction. In the second position, the locking pawl 20AA disengages. Additionally, the control unit 26 actuates the locking device 24 to lock the second roller half 21. After locking the second roller half 21, the control unit 26 activates the drive unit 23, causing the cable 15 to wind around the first roller half 20 to tension the cable (rotation direction A is clockwise when viewed from the opposite direction of operation I), or to shorten or lengthen the free cable length when the working width changes, by winding the cable onto or off the first roller half 20 (rotation direction A or B). Then the first roller half 20 moves back to the first position, and the locking device 24 is released again. Figure 4A ).

[0059] Figure 5A , Figure 5B and Figure 5C A simplified schematic diagram illustrates another alternative embodiment, which is similar to... Figure 4A and Figure 4B The difference in this embodiment is that the cable winch 16 is designed such that the first roller half 20 and the second roller half 21 form a clutch that operates only in one direction of rotation. Figure 5A , Figure 5B and Figure 5C The structure and function of the cable winch 16 correspond in other respects to those from Figure 4A and Figure 4B An embodiment of this. Therefore, the cable winch 16 also has Figure 4A and Figure 4B The drive unit 23, locking device 24, adjusting device 27, and control unit 26 are shown. Figure 5A A plan view of the end face of the first roller half 20 is shown, while Figure 5B A plan view of the end face of the second roller half 21 is shown.

[0060] On the end face of the first roller half 20, locking members 20AB are arranged to be circumferentially distributed at predetermined intervals around its rotation axis 22. Figure 5A On its end face about its axis of rotation 22, the second roller half 21 has locking pawls 21AB circumferentially distributed at predetermined intervals, which engage in locking members 20AB in the first position of the roller half. Figure 5B This causes the roller halves 20 and 21 to form a flywheel. Figure 5C One of a plurality of locking pawls 21AB is shown, engaging with one of a plurality of locking elements 20AB. The locking pawl 21AB is spring-biased by a spring. Figure 5C (Not shown in the image), causing a force F to act on the locking pawl, whereby the locking pawl rests on a stop surface 28B on the end face of the second roller half 21 with a first abutting surface 28A, and rests on a second stop surface 29B on the locking member 20AB of the first roller half 20 with a second abutting surface 29A. When the first roller half 20 is in the direction of arrow A relative to the stationary second roller half 21 (which corresponds to...) Figure 4A When rotating in the direction of A), the locking member 20AB engages the locking pawl 21AB on its inclined surface 30, so that the locking pawl is in the direction of arrow C. Figure 5C The flywheel rotates. However, the first roller half 20 rotates in the opposite direction B ( Figure 5C Rotation on the first working device 18 is impossible because the locking pawl 21AB prevents rotation in that direction. Therefore, in the direction of rotation B, the torque required to move the first working device 18, the second working device 18', and the third working device 18" can be easily transmitted. The spring tension F can be designed such that if the first roller half 20 is driven by the drive unit 23 in the direction of rotation A and the locking device 24 releases the second roller half 21 (first operating mode), the torque required to move the working devices in both directions (left and right) can be transmitted without "clutch slippage".

[0061] To tension cable 15 or shorten the free cable length, the second roller half 21 is locked, while the first roller half 20 rotates in the direction of rotation A. The predetermined intervals of the locking members 20AB of the first roller half 20 and the predetermined intervals of the locking pawls 21AB of the second roller half 21 are matched to each other in a vernier-scale manner. This creates a large number of locking positions, allowing for relatively small steps of cable tension adjustment.

[0062] However, when the first roller half 20 is in the first position, due to "clutch engagement" (see...) Figure 4ATherefore, the free cable length cannot be extended. To extend the free cable length, the first roller half 20 is moved to a second position by means of the adjusting device 27, in which the locking pawl 21AB is disengaged (see...). Figure 4B Then, the first roller half 20 rotates in the direction of rotation B, so that the cable 15 can be released from the first roller half 20. For this purpose, the second roller half 21 does not need to be locked.

Claims

1. Road construction machinery, comprising a mechanical frame (1) supported by a traveling mechanism, on which a first working device (11) is disposed, the first working device (11) having a first working apparatus (18) movable in a direction extending laterally to the working direction (I), the working apparatus being fastened to a bracket (13) guided on a linear guide (12) extending laterally to the working direction; Its features are, The bracket (13) is connected to a cable (15) deflected on one longitudinal side of the mechanical frame (1), the free end of which is fastened to the cable roller (19) of the cable winch (16) on the other longitudinal side of the mechanical frame (1), so that the bracket (13) can move in the lateral direction by rotating the cable roller. The cable roller (19) has a first roller half (20) and a second roller half (21), one end of the cable (15) is fastened to the first roller half (20), the other end of the cable is fastened to the second roller half (21), and the cable winch (16) is designed such that the cable winch (16) can present a first operating mode in which the first roller half (20) and the second roller half (21) are connected to each other, such that rotation of the first roller half and / or the second roller half in one direction or the other causes the bracket (13) to move in one direction or the other; and the cable winch can present a second operating mode in which the first roller half (20) and the second roller half (21) can rotate in opposite directions in at least one rotational direction, such that the cable tension of the cable (15) can be adjusted by rotating one roller half relative to the other roller half.

2. The road construction machinery according to claim 1, characterized in that, The first roller half (20) has at least one first connecting element (20A), and the second roller half (21) has at least one second connecting element (21A), the at least one first connecting element (20A) and the at least one second connecting element (21A) being designed such that a non-forced drive connection is established between the at least one first connecting element and the at least one second connecting element in a first operating mode.

3. The road construction machinery according to claim 1, characterized in that, The first roller half (20) has at least one first connecting element (20A), and the second roller half (21) has at least one second connecting element (21A). The at least one first connecting element (20A) and the at least one second connecting element (21A) are designed to establish a forced drive connection between the at least one first connecting element and the at least one second connecting element in a first operating mode.

4. The road construction machinery according to claim 1, characterized in that, The cable winch (16) is designed such that the first roller half (20) and the second roller half (21) form a clutch that operates only in one direction of rotation.

5. The road construction machinery according to claim 4, characterized in that, The first roller half (20) of the two roller halves has at least one locking element (20AB), and the second roller half (21) of the two roller halves has at least one spring-loaded locking pawl (21AB) that engages in the at least one locking element (20AB).

6. The road construction machinery according to claim 5, characterized in that, The first roller half (20) of the two roller halves has a plurality of locking elements (20AB) circumferentially distributed around the rotation axis (22) of the roller half at predetermined intervals, and the second roller half (21) of the two roller halves has a plurality of locking pawls (21AB) circumferentially distributed around the rotation axis (22) of the roller half at predetermined intervals.

7. The road construction machinery according to claim 6, characterized in that, The predetermined intervals of the locking members (20AB) of the first roller half (20) and the predetermined intervals of the locking pawls (21AB) of the second roller half (21) are matched with each other by vernier division, so that the roller half can be in various locking positions.

8. The road construction machinery according to any one of claims 5 to 7, characterized in that, The first roller half (20) and the second roller half (21) are axially displaced relative to each other between a first position and a second position, wherein in the first position at least one locking pawl (21AB) engages in at least one locking member (20AB), and in the second position at least one locking pawl (21AB) disengages from the locking member (20AB).

9. The road construction machinery according to any one of claims 1 to 7, characterized in that, The cable winch (16) has a locking device (24) designed to lock one of the two roller halves (20, 21) relative to the mechanical frame (1).

10. The road construction machinery according to claim 9, characterized in that, A perforated body (25) is provided on the second roller half (21) of the two roller halves. The perforated body (25) has a hole (25A) arranged circumferentially around the axis of rotation (22) of the roller half and a fixed frame (1A) with a drilled hole (1AA) assigned to the second roller half (21), such that a locking element (24A) can be pushed through the drilled hole (1AA) of the frame (1A) into one of the holes (25A).

11. The road construction machinery according to any one of claims 1 to 7, characterized in that, The cable winch (16) has a drive unit (23) for driving one of the two roller halves (20, 21).

12. The road construction machinery according to any one of claims 1 to 7, characterized in that, The road construction machinery is a slipform paver, whose mechanical frame (1) has a right frame portion (7B) extending in the working direction (I) and a left frame portion (7A) extending in the working direction. A slipform (10) is arranged between the right frame portion (7B) and the left frame portion (7A). The first working device (18) is a distribution device arranged in front of the slipform (10) in the working direction (I) for distributing the concrete to be paved in a direction that extends laterally to the working direction (I). The first working device (18) is a pusher that can move in the lateral direction.

13. The road construction machinery according to any one of claims 1 to 7, characterized in that, The road construction machinery is a slipform paver, whose mechanical frame (1) has a right frame portion (7B) extending in the working direction (I) and a left frame portion (7A) extending in the working direction, a slipform (10) is arranged between the right frame portion (7B) and the left frame portion (7A), a second working device (11') is a smoothing device arranged behind the slipform (10) in the working direction (I) for smoothing newly manufactured concrete, and the second working device (18') is a smoother that can move in a direction transverse to the working direction.

14. The road construction machinery according to any one of claims 1 to 7, characterized in that, The road construction machinery is a curing machine for newly manufactured concrete layers. The third working device (11”) is a texturing device for texturing the newly manufactured concrete. The third working device (18”) is a brush element that can move in a direction extending laterally to the working direction. Alternatively, the third working device (11”) is a spraying device for spraying newly manufactured concrete with liquid. The third working device (18”) is a nozzle that can move in a direction extending laterally to the working direction.

15. The road construction machinery according to any one of claims 1 to 7, characterized in that, The mechanical frame (1) of the road construction machinery and the linear guide (12) of the first working device (18) are designed for adjustable settings for different working widths.

16. The road construction machinery according to claim 13, characterized in that, The linear guide (12) of the second working device (18') is designed for adjustable settings for different working widths.

17. The road construction machinery according to claim 14, characterized in that, The linear guide (12) of the third working device (18”) is designed for adjustable settings for different working widths.

18. The road construction machinery according to claim 1, characterized in that, The road construction machinery mentioned is a slipform paver or curing machine used for newly manufactured concrete layers.

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