Support column

Abstract

The invention relates to a support column (1) for a climbing mast (2) of a stationary concrete distributor device (3), having at least one climbing device (4, 4a) which is movably guided on the support column (1) and has a lower and an upper guide carriage (5, 6) and a lifting mechanism (7) supported between the two guide carriages (5, 6), wherein the lower and the upper guide carriages (5, 6) each have a locking member (8, 9) which together with a climbing rail (10) fixed to the support column (1) forms a locking mechanism which prevents a movement of the guide carriage (5, 6) along the support column (1) in a locking direction (11) and permits a movement in a direction (12) opposite the locking direction (11). The problem addressed by the invention is that of specifying an improved support column (1) which provides a simple way of moving the climbing device (4, 4a) along the support column (1). To this end, the invention proposes that the lower and the upper guide carriages (5, 6) each have an actuation element (13, 14) which interacts with the locking member (8, 9), wherein the locking direction (11) can be reversed by actuating the actuation element (13, 14) such that the locking mechanism, in a first actuation position (15), prevents a downward movement (16) and, in a second actuation position (17), prevents an upward movement (18) of the respective guide carriage (5, 6) along the support column (1).

Description

[0001] Support column

[0002] The invention relates to a support column for a climbing mast of a stationary concrete distribution device, with at least one climbing device movably guided on the support column, which has a lower and an upper guide carriage and a lifting mechanism supported between the two guide carriages, wherein the lower and the upper guide carriage each have a locking member which, with a climbing rail fixed to the support column, forms a locking mechanism which prevents movement of the guide carriage along the support column in a locking direction and permits movement in a direction opposite to the locking direction.

[0003] Such a support column is known from WO 2008 / 025582 A1 and is used to construct multi-story concrete buildings. The support column is part of a climbing mast, which is formed from the support column and an articulated mast rotatably mounted on the support column. The articulated mast consists of mast segments that can be pivoted relative to one another and a concrete delivery line arranged along the mast segments. It also has an attached end hose at the mast tip, which is moved by the articulated mast to distribute concrete onto a floor slab of the building that is to be poured. The climbing mast is part of a stationary concrete distribution device, which is formed from the climbing mast and a stationary concrete pump, whereby the concrete pump pumps the concrete to be distributed onto the floor slab of the building that is to be poured through the concrete delivery lines to the end hose. After completion of a floor slab, the articulated mast can climb upwards over the support column to construct the next higher floor slab.When the support column is raised to the next higher floor using the lifting mechanism, the climbing device initially remains on the floor below. To complete the climbing process, the climbing device must be moved to the next higher floor after the support column has been secured in the raised position. For this purpose, WO 2008 / 025582 A1 proposes a pulling mechanism located at the upper end of the climbing rail. An additional device is therefore required for climbing, which makes erecting the support column complex. As an alternative to this additional pulling mechanism, it is currently still common practice to transport the dismantled climbing device in individual parts by hand, possibly assisted by a construction site lift, up one floor. This method of moving the climbing device is particularly time-consuming and physically demanding.

[0004] It is therefore an object of the invention to provide an improved support column which offers a simpler way of moving the climbing device along the support column.

[0005] This object is achieved by a support column having the features of claim 1.

[0006] Because the lower and upper guide carriages each have an actuating element that interacts with the locking member, the locking direction being reversible by actuating the actuating element. In a first actuating position, the locking mechanism prevents downward movement of the respective guide carriage along the support column and, in a second actuating position, prevents upward movement of the respective guide carriage, the climbing device can be moved more easily along the support column. By reversing the locking direction of the locking mechanism, the direction of movement of the climbing device along the support column can be easily changed. This allows the climbing device to climb upwards independently via the lifting mechanism on the climbing rail. A pulling mechanism or manual transport to the next higher floor is therefore not required.Actuating the actuating element causes the locking direction and the opposite direction of movement of the climbing device to swap. Thus, in a first actuating position, the locking elements, which prevent the guide carriages from moving downward along the support column, can be used to allow the climbing device to climb independently up the climbing rail via the lifting mechanism. In a second actuating position, the locking elements prevent the guide carriages from moving upward along the support column, allowing the lifting mechanism to push the support column upward along the climbing rail.

[0007] Advantageous embodiments and further developments of the invention emerge from the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically expedient manner, thus revealing further embodiments of the invention.

[0008] According to an advantageous embodiment of the invention, the actuating elements are each designed as pivoting levers with a spring element, and the locking members are each designed as locking levers, wherein a spring force applied by the spring element of the pivoting lever acts on either a lower or an upper end of the locking lever in the direction of the climbing rail, depending on the pivoting position of the pivoting lever. The actuating element designed as a pivoting lever provides a simple way of changing the locking direction and the opposite direction of movement on the climbing device. The pivoting lever enables the spring force applied by the spring element to be directed in different directions depending on the selected actuating position. Thus, one spring element can act on the lower end of the locking lever and another on the upper end of the locking lever.The locking direction can be easily reversed by actuating the actuating element, so that in the first actuating position or in the first pivoting position of the pivoting lever, the locking mechanism enables an upward movement of the climbing device along the support column, and in the second actuating position or in the second pivoting position of the pivoting lever, it allows a downward movement of the respective guide carriage along the support column. A particularly preferred embodiment provides that the locking levers are each rotatably mounted on the respective guide carriage about a horizontal axis of rotation arranged between their lower and upper ends. Due to the rotatable mounting of the locking levers on the guide carriage, the locking levers can be rotated clockwise or counterclockwise about the axis of rotation by the spring force of the spring element, depending on the actuating position of the pivoting lever.Depending on the pivoting position of the pivot lever, the spring force acts either on the lower end of the locking lever below the pivot axis or on the upper end of the locking lever above the pivot axis. In the first actuation position of the actuating element, the lower end of the locking lever is pushed toward the climbing rail. In the second actuation position of the actuating element, however, the upper end of the locking lever is pushed toward the climbing rail.

[0009] A particularly advantageous embodiment of the invention relates to the climbing rail being toothed and having steep tooth flanks pointing alternately upwards and downwards along its longitudinal extent, which, as locking pieces of the locking mechanism, are designed to form a positive connection with either the lower or the upper ends of the locking levers, depending on the locking direction. With the tooth flanks pointing alternately upwards and downwards, the climbing rail offers the possibility of accommodating the locking levers when preventing a downward movement of the climbing device and also of locking the locking levers when preventing an upward movement of the climbing device along the support column. The locking levers engage with the next tooth flanks when moving along the climbing rail in the opposite direction to the locking direction.When the guide carriage moves downwards along the climbing rail, the locking levers engage with the downward-facing tooth flanks and in doing so pass over the upward-facing tooth flanks. When the guide carriage moves upwards along the climbing rail, the locking levers engage with the upward-facing tooth flanks and in doing so pass over the downward-facing tooth flanks. A particularly advantageous embodiment of the invention provides that in a first pivoting position, the spring force acts on the lower end of the respective locking lever so that it is held against an upward-facing steep tooth flank of the climbing rail and a downward movement of the guide carriage along the climbing rail is prevented, while the lower end of the respective locking lever can slide over the downward-facing steep tooth flanks during an upward movement of the guide carriage, overcoming the spring force.In the first pivot position, the spring force acts on the lower end of the respective locking lever, preventing the upper end of the locking lever from engaging the climbing rail. This way, only the lower end of the locking lever is pressed against the upward-facing tooth flank of the climbing rail, preventing the guide carriage from moving downward along the climbing rail.

[0010] An advantageous embodiment of the invention provides that in a second pivot position the spring force acts on the upper end of the respective locking lever so that it is held against a downward-facing steep tooth flank of the climbing rail and an upward movement of the respective guide carriage along the climbing rail is prevented, while the upper end of the respective locking lever can slide over the upward-facing steep tooth flanks during a downward movement of the respective guide carriage, overcoming the spring force. In the second pivot position the spring force acts on the upper end of the respective locking lever so that the lower end of the locking lever does not engage with the climbing rail. In this way only the upper end of the locking lever is pressed against the downward-facing tooth flank of the climbing rail and an upward movement of the guide carriage along the climbing rail is prevented.

[0011] A particularly advantageous embodiment provides that the climbing rail has flat tooth flanks in the spaces between the steep tooth flanks pointing upwards and downwards toward each other. The upper and lower ends of the locking levers can slide over these flat tooth flanks during both a downward and an upward movement of the respective guide carriage. The locking levers are guided into the steep tooth flanks via the flat tooth flanks. The spring force of the spring element presses the locking levers against the climbing rail.

[0012] An advantageous embodiment provides that the downward-facing, steep tooth flanks are curved in a hook shape so that they positively engage the upper ends of the locking levers. The hook-shaped curvature of the tooth flanks secures the locking levers in the tooth flanks while preventing the upward movement of the guide carriages. This reliably prevents a downward movement of the support column and allows the support column to be safely pushed upwards via the lifting mechanism. The upper ends of the locking levers are securely attached to the climbing rail so that a controlled movement of the support column is possible. An advantageous embodiment provides that the upward-facing, steep tooth flanks are straight so that they positively engage the lower ends of the locking levers.The straight tooth flanks secure the locking levers in the tooth flanks, preventing the downward movement of the guide carriages. This reliably prevents downward movement of the climbing device, and the lifting mechanism allows the climbing device to be safely moved upwards along the climbing rail. The lower ends of the locking levers are securely bolted to the climbing rail, allowing controlled movement of the climbing device.

[0013] According to a preferred embodiment of the invention, the pivot levers are each pivotably mounted on the guide carriage about a pivot axis, wherein the pivot levers each have an axially displaceable contact piece which is subjected to the spring force and which comes into contact with the upper or lower end of the associated locking lever to transmit the spring force. Pivoting the pivot lever about the pivot axis provides a simple actuating element which interacts with the locking lever. By pivoting the pivot lever between the two pivot positions, the contact piece can be in contact with the upper or lower end of the locking lever to transmit the spring force. The spring force ideally acts in a radial direction relative to the pivot axis of the pivot lever.This makes it easy to reverse the locking direction of the locking mechanism and the opposite direction of movement of the guide carriages along the climbing rail.

[0014] A particularly advantageous embodiment provides that the locking levers each have limit stops for the contact piece of the associated pivot lever, which limit the pivoting path of the pivot lever. The limit stops on the locking levers ensure that the pivoting movement of the pivot lever is limited between the two pivot positions. The contact piece of the associated pivot lever is secured in the respective pivot position by one of the limit stops in alignment with the pivot axis. This limits the pivoting path of the pivot lever in the pivot positions.

[0015] A particularly advantageous embodiment of the invention provides for the guide carriages to be guided by sliders in guide grooves on the support column. By guiding the sliders in the guide grooves, a controlled movement of the climbing device along the support column can be ensured in a simple design.

[0016] An advantageous embodiment of the invention provides that each guide carriage is provided with at least two sliders, which are guided in opposing guide grooves, with the climbing rail running in a central area between the sliders, as seen in the cross-section of the support column. In this way, the locking elements of the guide carriages can be securely positioned relative to the climbing rail. The opposing guide grooves ensure that the guide carriages are guided via the sliders, with the locking elements being positioned to match the centrally arranged climbing rail.

[0017] A particularly advantageous embodiment provides that the lower guide carriage has a support element that can be spread outward relative to the support column. The climbing device can support the support column on a floor ceiling via the outwardly spread support element. Further features, details, and advantages of the invention will become apparent from the following description and from the drawings, which show exemplary embodiments of the invention. Corresponding objects or elements are provided with the same reference numerals in all figures. They show:

[0018] Figure 1 supporting column according to the invention on a building,

[0019] Figure 2 Support column on building supported on next higher floor ceiling,

[0020] Figure 3 Climbing device when pushing up the support column,

[0021] Figure 4 Climbing device when lowering the support column,

[0022] Figure 5 Climbing device with offset support column,

[0023] Figure 6 Climbing device when pushing up the upper guide carriage,

[0024] Figure ? Climbing device when pulling the lower guide carriage,

[0025] Figure 8 View of climbing device on support column,

[0026] Figure 9 Individual views of climbing devices,

[0027] Figure 10 Cross section through support column,

[0028] Figure 11 Cross section through support column and climbing devices,

[0029] Figure 12 Detailed view of the actuating element in the first actuating position, Figure 13 Detailed view of another actuating element in the second actuating position, and

[0030] Figure 14 Detailed view of another actuating element.

[0031] A support column according to the invention is schematically shown in Figure 1, designated by the reference numeral 1. The support column 1 is part of a climbing mast formed from the support column 1 and an articulated mast 29 rotatably mounted on the support column 1. The articulated mast 29 consists of mast segments that can be pivoted relative to one another and a concrete delivery line arranged along the mast segments, with an end hose 36 connected to it at the mast tip, which is moved by the articulated mast 29 to distribute concrete on a floor slab D of the building G that is to be poured. The climbing mast is part of a stationary concrete distribution device 3 formed from the climbing mast and a stationary concrete pump, wherein the concrete pump pumps the concrete to be distributed on the floor slab D of the building G that is to be poured through the concrete delivery lines to the end hose 36.After completion of a floor D, the articulated mast 29 can climb upwards over the support column 1 to create the next higher floor D. When the support column 1 is raised to the next higher floor D via the lifting mechanism 7 (Fig. 3), the climbing device 4, 4a initially remains on the floor D below. To complete the climbing process, the climbing device 4, 4a must be moved to the next higher floor D after securing the support column 1 in the raised position, as shown in Figure 2.

[0032] Figure 3 shows two climbing devices 4, 4a being pushed up together on the support column 1 from Figures 1 and 2 in a schematic detailed view. The support column 1 can also be pushed up by just one climbing device 4, 4a, but with two climbing devices 4, 4a, greater stability can be achieved with an overall lower weight. The climbing devices 4, 4a are movably guided on the support column 1. The climbing devices 4, 4a each have a lower guide carriage 5 and an upper guide carriage 6, with a lifting mechanism 7 arranged between each of the two guide carriages 5, 6. In the exemplary embodiment, the lifting mechanism 7 is designed as a hydraulic cylinder. The lower and upper guide carriages 5, 6 each have a locking member 8, 9. The locking members 8, 9 each form a locking mechanism with a climbing rail 10 fixed to the support column 1.The locking mechanism serves as a safety device to prevent unwanted movement of the guide carriages 5, 6. When the support column 1 is pushed upwards, the locking mechanism allows the lower guide carriage 5 to move in a direction 12 opposite to the locking direction 11. It prevents the uncontrolled return of the lower guide carriage 5 against the direction of movement 12 of the guide carriage 5. In this way, the locking mechanism secures the upward movement of the support column 1. On the other hand, the locking mechanism also prevents the upper guide carriage 6 from moving along the support column 1 in the locking direction 11. Via the lifting mechanism 7 between the guide carriages 5, 6, the climbing devices 4, 4a in Figure 3 jointly push the support column 1 upwards along the upper guide carriage 6. A separate climbing rail 10 is provided on the support column 1 for each of the two climbing devices 4, 4a.On the lower guide carriage 5 of the climbing devices 4, 4a, an outwardly expandable support element 35 is arranged, with which the climbing devices 4, 4a are supported from the floor D.

[0033] Figure 4 shows the climbing devices 4, 4a according to Figure 3 during the lowering of the support column 1. Here, the lower locking members 8 of the lower guide carriages 5 engage with the climbing rails 10, since the support column 1 is lowered onto the lower locking members 8 via the lifting mechanisms 7 of the climbing devices 4, 4a, as shown in Figure 5.

[0034] The invention is characterized in that the lower guide carriage 5 and the upper guide carriage 6 each have an actuating element 13, 14 which interacts with the locking member 8, 9, wherein the locking direction 11 is reversible by actuating the actuating element 13, 14, in such a way that the locking mechanism prevents a downward movement 16 of the respective guide carriage 5, 6 along the support column 1 in a first actuating position 15, as shown in Figure 6, and an upward movement 18 of the respective guide carriage 5, 6 in a second actuating position 17, as already shown in Figures 3 to 5. This allows the climbing devices 4, 4a to be moved more easily along the support column 1. By reversing the locking direction 11 of the locking mechanism, the direction of movement 12 of the climbing devices 4, 4a along the support column 1 can be changed in a simple manner.This allows the climbing devices 4, 4a to climb independently up the climbing rails 10 via the lifting mechanism 7, which will be explained in more detail with reference to Figures 6 and 7. Actuation of the actuating element 13, 14 causes the locking direction 11 and the opposite direction of movement 12 of the climbing devices 4, 4a to swap. Thus, in a first actuating position 15, the locking elements 8, 9, which prevent a downward movement of the guide carriages 5, 6 along the support column 1, can be used via the actuating elements 13, 14, so that the climbing devices 4, 4a can climb independently up the climbing rails 10 via the lifting mechanism 7. Via the actuating elements 13, 14 in a second actuating position 17 (Fig. 3 to 5), the locking members 8, 9 do not allow any upward movement of the guide carriages 5, 6 along the support column 1, whereby the lifting mechanism 7 can push the support column 1 upwards on the climbing rail 10.In the illustrated embodiments, the actuating elements 13, 14 are each designed as pivot levers 19, 20. The locking members 8, 9 are each designed as locking levers. In addition to the pivot levers 19, 20, the actuating elements 13, 14 also comprise spring elements 21 (Figs. 13 and 14), which exert a spring force 22 (Figs. 13 and 14) on either a lower end 23 or an upper end 24 of the locking lever 8, 9 in the direction of the climbing rail 10, depending on the pivot position of the pivot lever 19, 20.

[0035] This provides a simple way of changing the locking direction 11 and the opposite direction of movement 12 on the climbing device 4, 4a. The pivoting lever 19, 20 enables the spring force 22 (Fig. 13 and 14) applied by the spring element 21 (Fig. 13 and 14) to be directed in different directions depending on the selected actuating position. Thus, one spring element 21 (Fig. 13 and 14) can act on the lower end 23 of the locking lever 8, 9 and another on the upper end 24 of the locking lever 8, 9. The locking levers 8, 9 are each rotatably mounted on the respective guide carriage 5, 6 about a horizontal axis of rotation 25 (Fig. 12, 13 and 14) arranged between their lower and upper ends 23, 24. Thus, the locking levers 8, 9 on the guide carriages 5, 6 can be actuated by the spring force 22 (Fig. 13 and 14) of the spring element 21 (Fig. 13 and 14) depending on the actuating position of the pivoting levers 19, 20.14) can be rotated clockwise or counterclockwise about the rotation axis 25 (Figs. 12, 13 and 14). Since the climbing rail 10 has alternating upward-facing tooth flanks 26 and downward-facing steep tooth flanks 27 along its longitudinal extent, which are designed as locking pieces of the locking mechanism, depending on the locking direction 11, the lower ends 23 or the upper ends 24 of the locking levers 8, 9 engage in the tooth flanks 26, 27 and form a positive connection. In a first pivoting position, the spring force 22 acts on the lower end 23 of the respective locking lever 8, 9, as can be seen in Figure 12 or Figure 14. As a result, the lower end 23 of the respective locking lever 8, 9 is held against an upward-facing steep tooth flank 26 of the climbing rail 10. This can also be seen in Figures 6 and 7. Here, a downward movement 16 of the guide carriages 5, 6 along the climbing rail 10 is prevented.The lower locking lever 8 of the lower guide carriage 5 is thereby supported on the climbing rail 10 in that the lower locking lever 8 engages in an upwardly facing tooth flank 26. As the lifting mechanism 7 is moved upwards in Figure 6, the upper guide carriage 6 is moved upwards in the direction of movement 12. During this upward movement 18 of the upper guide carriage 6, the lower end 23 of the upper locking lever 9 slides over the downwardly facing steep tooth flanks 27, overcoming the spring force 22. As soon as the upper locking lever 9 of the upper guide carriage 6 engages in an upwardly facing tooth flank 26 on the climbing rail 10, the lower locking lever 8 is released from the upwardly facing tooth flank 26, as the lifting mechanism 7 is retracted again. During this upward movement 18 of the lower guide carriage 5, the lower end 23 of the lower locking lever 8 slides over the downwardly pointing steep tooth flanks 27, overcoming the spring force 22.As soon as the lower end 23 of the lower locking lever 8 on the lower guide carriage 5 engages with an upwardly facing tooth flank 26 on the climbing rail 10, the upper locking lever 9 disengages from the upwardly facing tooth flank 26 because the lifting mechanism 7 is extended again. In this way, the climbing device 4, 4a can climb independently up the support column 1. The locking mechanism thus enables an upward movement of the climbing device 4, 4a along the support column 1. As the climbing device 4, 4a climbs up, the support element 35 on the lower guide carriage 5 is folded in until the next floor is reached. Here, the support element 35 can be folded out again in order to push the support column 1 with the climbing device 4, 4a higher again. For this purpose, the locking direction 11 can be easily reversed by actuating the actuating element 13, 14.

[0036] In a second pivoted position of the pivot levers 19, 20, which is also shown in Figure 3, the spring force 22 (Fig. 13) acts on the upper end 24 of the respective locking lever 8, 9. The upper end 24 of the respective locking lever 8, 9 is held, as can be seen in Figures 3 to 5, against a downward-facing, steep tooth flank 27 of the climbing rail 10. This prevents an upward movement 18 of the respective guide carriage 5, 6 along the climbing rail 10. During a downward movement 16 of the upper guide carriage 6, the upper end 24 of the upper locking lever 9 will slide over the upward-facing, steep tooth flanks 26, overcoming the spring force 22 (Fig. 13). As soon as the upper locking lever 9 of the upper guide carriage 6 engages with a downward-facing tooth flank 27 on the climbing rail 10, the lower locking lever 8 of the lower guide carriage 5 is released from the downward-facing tooth flank 27, since the lifting mechanism 7 is extended again.During the upward movement 18 of the support column 1, the upper end 24 of the lower locking lever 8 slides over the upward-facing tooth flanks 26, overcoming the spring force 22. As soon as the upper end 24 of the lower locking lever 8 on the lower guide carriage 5 engages a downward-facing tooth flank 27 on the climbing rail 10, the upper locking lever 9 disengages from the downward-facing tooth flank 27 because the lifting mechanism 7 is retracted. In this way, the climbing device 4, 4a can easily push the support column 1 further upward via the lifting mechanism 7. The downward-facing, steep tooth flanks 27 are advantageously curved in a hook shape, so that they positively accommodate the upper ends 24 of the locking levers 8, 9. This reliably secures the support column 1 against the locking levers 8, 9 slipping when it is pushed up over the climbing devices 4, 4a.As can be clearly seen in Figure 6 or Figure 13, the climbing rail 10 has flat tooth flanks 28 in the spaces 28 between the steep tooth flanks 26, 27 pointing upwards and downwards towards each other, over which the upper and lower ends 23, 24 of the locking levers 8, 9 can slide both during a downward and an upward movement 16, 18 of the respective guide carriage 5, 6.

[0037] Figure 8 shows a perspective view of one of the climbing devices 4, 4a on support column 1. The actuating elements 13, 14 on the guide carriages 5, 6 are easily accessible from the outside for manual adjustment of the actuating position or pivoting position.

[0038] Figure 9 shows individual views of the climbing devices 4, 4a. In the left-hand climbing device 4, the expandable support element 35 is folded out for support on a floor slab, while in the right-hand climbing device 4a, the expandable support element 35 is folded in so that the climbing device 4a can climb upwards along the support column 1 through a cutout in the floor slab.

[0039] Figure 10 shows a cross-section through the support column 1. It can be seen that the support column 1 has a substantially octagonal basic shape in cross-section. Guide grooves 34 are formed on the support column 1.

[0040] As can be seen in Figure 11, the guide carriages 5, 6 (Fig. 9) are guided via sliders 33 in the guide grooves 34 on the support column 1. Four sliders 33 are provided on each of the guide carriages 5, 6 (Fig. 9), with two sliders per guide carriage 5, 6 (Fig. 9) being guided in one of the opposite guide grooves 34. The climbing rail 10 runs in a central area between the sliders 33. For this purpose, the climbing rail 10 is arranged centrally between the guide grooves 34.

[0041] Figures 12 to 14 show guide carriages 5, 6 with differently designed actuating elements 13, 14 and differently designed pivot levers 19, 20. All designs have in common that the pivot levers 19, 20 are each pivotably mounted on the guide carriages 5, 6 about a pivot axis 30. The pivot levers 19, 20 each have an axially displaceable contact piece 31 subjected to the spring force 22. To transmit the spring force 22, the contact piece 31 rests either on the upper end 24 (Fig. 13) or the lower end 23 (Figs. 12 and 14) of the associated locking lever 8, 9. The locking levers 8, 9 each have limit stops 32 for the contact piece 31 of the associated pivot lever 19, 20, which limit the pivoting path of the pivot lever 19, 20. In Figures 12 and 14, the actuating member 13, 14 or the pivot lever 19, 20 is in the first actuating position 15 or first pivoting position.In Figure 13, the actuating member 14 or the pivoting lever 20 is shown by way of example in the second actuating position 17 or the second pivoting position.

[0042] - List of reference symbols -

[0043] Reference symbol list

[0044] 1 support column

[0045] 2 Climbing mast 3 Concrete distribution device

[0046] 4 First climbing device, 4a second climbing device

[0047] 5 Lower guide carriage

[0048] 6 Upper guide carriage

[0049] 7 Lifting mechanism 8 Lower locking link (lower locking lever)

[0050] 9 Upper locking link (upper locking lever)

[0051] 10 climbing rails

[0052] 11 Blocking direction

[0053] 12 Direction of movement 13 Lower actuating element

[0054] 14 Upper actuating element 15 First actuating position

[0055] 16 Downward movement

[0056] 17 Second operating position

[0057] 18 Upward movement 19 Lower pivot lever

[0058] 20 Upper pivot lever

[0059] 21 Spring element

[0060] 22 spring force

[0061] 23 Lower end (of the locking lever) 24 Upper end (of the locking lever)

[0062] 25 axis of rotation

[0063] 26 upward-facing tooth flanks

[0064] 27 downward-facing tooth flanks

[0065] 28 Spaces, flat tooth flanks 29 Articulated mast

[0066] 30 swivel axis

[0067] 31 investment piece

[0068] 32 limit stops

[0069] 33 Sliders 34 Guide channels

[0070] 35 Support element

[0071] 36 end hose

[0072] D Floor ceiling G Building

[0073] - Patent claims -

Claims

Patent claims 1. Support column (1 ) for a climbing mast (2) of a stationary Concrete distribution device (3), with at least one climbing device (4, 4a) which is movably guided on the support column (1), which climbing device has a lower and an upper guide carriage (5, 6) and a lifting mechanism (7) supported between the two guide carriages (5, 6), wherein the lower and the upper guide carriage (5, 6) each have a locking member (8, 9) which, with a climbing rail (10) fixed to the support column (1), forms a locking mechanism which prevents movement of the guide carriage (5, 6) along the support column (1) in a locking direction (11) and permits movement in a direction (12) opposite to the locking direction (11, 12), characterized in that the lower and the upper guide carriage (5, 6) each have an actuating member (13, 14) which interacts with the locking member (8, 9), wherein the locking direction (11) is determined by Actuation of the actuating member (13, 14) is reversible, in such a way thatthat the locking mechanism prevents a downward movement (16) of the respective guide carriage (5, 6) along the support column (1) in a first actuating position (15) and an upward movement (18) of the respective guide carriage (5, 6) in a second actuating position (17).

2. Support column (1) according to claim 1, characterized in that the actuating members (13, 14) are each designed as a pivoting lever (19, 20) with a spring element (21) and the locking members (8, 9) are each designed as a locking lever, wherein a spring force (22) applied by the spring element (21) of the pivoting lever (19, 20) acts, depending on the pivoting position of the pivoting lever (19, 20), either on a lower or an upper end (23, 24) of the locking lever (8, 9) in the direction of the climbing rail (10).

3. Support column (1) according to claim 2, characterized in that the locking levers (8, 9) are each rotatably mounted on the respective guide carriage (5, 6) about a horizontal axis of rotation (25) arranged between their lower and upper ends (23, 24).

4. Support column (1) according to one of claims 2 or 3, characterized in that the climbing rail (10) is toothed and has steep tooth flanks (26, 27) pointing alternately upwards and downwards along its longitudinal extent, which are designed as locking pieces of the locking mechanism to form a positive connection with either the lower or the upper ends (23, 24) of the locking levers (8, 9), depending on the locking direction (11).

5. Support column (1) according to claim 4, characterized in that in a first pivoting position the spring force (22) acts on the lower end (23) of the respective locking lever (8, 9) so that the latter is held against an upwardly pointing steep tooth flank (26) of the climbing rail (10) and a downward movement (16) of the guide carriage (5, 6) along the climbing rail (10) is prevented, while the lower end (23) of the respective locking lever (8, 9) can slide over the downwardly pointing steep tooth flanks (27) during an upward movement (18) of the guide carriage (5, 6) while overcoming the spring force (22).

6. Support column (1) according to claim 4 or 5, characterized in that in a second pivot position the spring force (22) acts on the upper end (24) of the respective locking lever (8, 9) so that the latter is held against a downwardly pointing steep tooth flank (27) of the climbing rail (10) and an upward movement (18) of the respective guide carriage (5, 6) along the climbing rail (10) is prevented, while the upper end (24) of the respective locking lever (8, 9) can slide over the upwardly pointing steep tooth flanks (26) during a downward movement (16) of the respective guide carriage (5, 6) while overcoming the spring force (22).

7. Support column (1) according to one of claims 4 to 6, characterized in that the climbing rail (10) in the spaces (28) between the mutually upward and downward pointing steep tooth flanks (26, 27) has flat tooth flanks (28) over which the upper and lower ends (23, 24) of the locking levers (8, 9) can slide during both a downward and an upward movement (16, 18) of the respective guide carriage (5, 6).

8. Support column (1) according to one of claims 4 to 7, characterized in that the downwardly pointing steep tooth flanks (27) are curved in a hook-like manner, so that they receive the upper ends (24) of the locking levers (8, 9) in a form-fitting manner.

9. Support column (1) according to one of claims 2 to 8, characterized in that the pivoting levers (19, 20) are each pivotably mounted on the guide carriages (5, 6) about a pivot axis (30), wherein the pivoting levers (19, 20) each have an axially displaceable contact piece (31) which is acted upon by the spring force (22) and which comes into contact with the upper or lower end (23, 24) of the associated locking lever (8, 9) in order to transmit the spring force (22).

10. Support column (1) according to claim 9, characterized in that the locking levers (8, 9) each have limit stops (32) for the contact piece (31) of the associated pivot lever (19, 20), which limit the pivoting path of the pivot lever (19, 20).

11. Support column (1) according to one of the preceding claims, characterized in that the guide carriages (5, 6) are guided via sliders (33) in guide grooves (34) on the support column (1).

12. Support column (1) according to claim 11, characterized in that at least two sliders (33) are provided on each guide carriage (5, 6), which are guided in mutually opposite guide grooves (34), the climbing rail (10), seen in the cross section of the support column (1), running in a central region between the sliders (33).

13. Support column (1) according to one of the preceding claims, characterized in that the lower guide carriage (5) has a support element (35) which can be spread outwards with respect to the support column (1). - Summary -

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