Load-bearing device

Abstract

A load-bearing device (1) comprises a storage box (3) for embedding in concrete (2) and at least one load-bearing element (11). The load-bearing element (11) is pivotably mounted between a folded position (30) and an unfolded position (31). In the folded position (30), the load-bearing element (11) is arranged in an interior space (4) of the storage box (3). In the unfolded position (31), the load-bearing element (11) projects at least partially from the interior space (4). To allow for the easy attachment of eyelets, hooks, or the like to the load-bearing element (11) in the unfolded position (31), even from a distance, a locking element (12) is provided, which secures the at least one load-bearing element (11) in the unfolded position (31) against pivoting into the folded position (30).

Description

[0001] The invention relates to a load-bearing device of the type specified in the preamble of claim 1.

[0002] Load-bearing devices for embedding in concrete are used, for example, in scaffold-free elevator installation. During elevator installation, the elevator car serves as a working platform and is suspended from one or more load-bearing devices that are embedded in the concrete ceiling of the elevator shaft.

[0003] WO 2013 / 064497 A1 describes a load-bearing device, namely a load loop box. Flexible load loops serve as the load-bearing elements in WO 2013 / 064497 A1. When attaching an eye hook to such a loop, the loop can deflect laterally, making attachment more difficult. This deflection of the loop is particularly noticeable when the eye hook has a spring-loaded locking mechanism that must be overcome when attaching the hook, requiring a comparatively large force to be applied.

[0004] US7651305 B1 discloses another load-bearing device.

[0005] If such rope loops are designed with a comparatively high stiffness in order to also allow the attachment of eye hooks with spring locks, then swinging the rope loops back into the storage box after use of the rope loops is made more difficult.

[0006] The invention is based on the objective of creating a load-bearing device of the generic type in which it is possible to attach an eye hook remotely in a simple manner.

[0007] This problem is solved by a load-bearing device having the features of claim 1.

[0008] According to the invention, a locking element is provided that secures the at least one load-bearing element in the unfolded position against pivoting into the folded position. This additional locking element makes it easy to prevent the load-bearing element from accidentally pivoting back into the folded position and to easily attach fastening elements such as eye hooks or the like to the load-bearing element remotely. The locking element can be designed to be compact, as it only needs to prevent the load-bearing element from folding into the folded position. The locking element therefore has only a negligible impact on the installation space of the load-bearing device. This results in a compact and simple arrangement that is easy to operate.After releasing the locking element, the load-bearing element can easily be swung back into the storage box.

[0009] According to the invention, the locking element has a locking position in which it secures the load-bearing element and an unlocking position in which the load-bearing element can be pivoted about a pivot axis. The load-bearing element is preferably freely pivotable. In the unlocking position of the locking element, the load-bearing element can thus be easily and with minimal effort pivoted from the extended position back into the folded position, i.e., into the storage box, so that after use of the load-bearing device, the load-bearing element does not protrude into the working space, in particular the elevator shaft, and reduce its working height.

[0010] In an advantageous embodiment, the locking element is spring-mounted in the direction of its locking position. This ensures that the locking position is reliably reached and prevents unintentional movement of the locking element into the unlocked position. In an alternative embodiment, however, the locking element may also be mounted without springs. According to the invention, in a design without springs, the locking element falls into its locking position due to gravity when the load-bearing element is moved into the unfolded position. This results in automatic locking when the load-bearing element is moved into the unfolded position. The movement into the unfolded position occurs when a lid of the storage box is removed.According to the invention, when a lid of the storage box is removed, the load-bearing element falls into the unfolded position due to gravity, and the locking element falls into the locked position with or without the support of a spring.

[0011] Advantageously, the locking element is actuated by a spring, which is designed as a compression spring and is supported at one end against the storage box and at the other end against the locking element. A simple design results when the locking element, in the folded position of the load-bearing element, is held in the unlocked position by the load-bearing element. This allows the load-bearing element to pivot automatically from the folded position to the unfolded position without being hindered by the locking element. When the load-bearing element is adjusted in its unfolded position, the locking element automatically assumes the locked position. This locking occurs due to the force of a spring and / or the weight of the locking element.

[0012] The locking element is mounted so that it can be moved transversely, in particular perpendicularly to the pivot axis of the load-bearing element.

[0013] This allows the locking element to achieve simple locking of the load-bearing element with a short actuation distance. Preferably, the locking element is arranged vertically above the pivot axis of the load-bearing element and falls downwards into the locking position due to gravity during adjustment.

[0014] A simple load-bearing device with few individual parts is achieved when the device incorporates an eyebolt, with the load-bearing element pivotably mounted in one eye of the eyebolt. The locking element is advantageously mounted slidably on a shaft of the eyebolt. A guide element is advantageously provided, which supports the locking element on the eyebolt. The guide element ensures precise guidance of the locking element. Preferably, the guide element acts as a stop for the locking element in the locked position. Alternatively, the guide element can also be mounted directly on the eyebolt.

[0015] The storage box advantageously has at least one anchor for anchoring in the concrete. In a preferred design, exactly one anchor is provided. This allows the storage box to be easily fitted into existing reinforcement for the concrete slab. The anchor ensures stable anchoring in the surrounding concrete. A simple anchor design is achieved if the anchor comprises a washer and a nut. The washer is specifically positioned on the eye bolt and secured to the eye bolt by the nut. The eye bolt thus serves both as a functional element for fixing the anchor and as a guide element for the locking element and as a bearing element for the load-bearing element. This allows for a simple design of the load-bearing device with a small number of individual parts.In an advantageous design, a spacer element is provided that braces itself against the storage box and the disc, thereby fixing the disc's position on the eyebolt. The eyebolt is preferably fixed to the storage box via the nut. This results in a simpler construction. However, a different design and fixing of the anchor and bearing elements for the load-bearing element may also be advantageous.

[0016] The load-bearing element is preferably rigid. This allows an eyelet or similar device to be easily attached to the load-bearing element, especially from a greater distance. In a preferred embodiment, the load-bearing element is a rigid ring, for example, a chain link. However, other designs for the load-bearing element may also be advantageous.

[0017] An embodiment of the invention is explained below with reference to the drawing. The drawing shows: Fig. 1 and Fig. 2 are schematic sectional views through the load-bearing device in the folded-in position of the load-bearing element, and Fig. 3 and Fig. 4 are schematic sectional views of the load-bearing device in the unfolded position of the load-bearing element.

[0018] Fig. 1Figure 1 shows a load-bearing device 1 embedded in concrete 2. The load-bearing device 1 is flush with a ceiling surface 28 that defines the space below. The ceiling surface 28 is, in particular, the ceiling surface of an elevator shaft. The load-bearing device 1 has a storage box 3 to which an anchor 6 is attached. The anchor 6 projects from the storage box 3 towards the side facing away from the ceiling surface 28. The storage box 3 has an interior space 4, which is closed externally by a removable cover 5. In the exemplary embodiment, the cover 5 has locking elements 15 that engage with locking projections 25 of the storage box 3. Another releasable fixing of the cover 5 to the storage box 3 may also be advantageous. In the exemplary embodiment, the outer surface of the cover 5 is flush with the ceiling surface 28.

[0019] A load-bearing element 11 is arranged in the interior 4 of the storage box 3. In this embodiment, the load-bearing element 11 is designed as a rigid ring, for example, as a chain link. The load-bearing element 11 is mounted to pivot freely about a pivot axis 19. When the lid 5 is removed, the load-bearing element 11 pivots about the pivot axis 19 downwards in the direction of arrow 24 until the load-bearing element 11 hangs approximately vertically downwards. Figs. 1 and 2 Figure 11 shows the load-handling device 11 in its folded position 30. The downward-swiveled, unfolded position is shown in the Figs. 3 and 4 shown.

[0020] How Fig. 1As shown, the load-bearing element 11 is pivotably mounted in an eye 23 of an eyebolt 7 in the exemplary embodiment. The eyebolt 7 serves both as the bearing for the load-bearing element 11 and as the fastening element for the anchor 6. In the exemplary embodiment, the anchor 6 comprises a spacer sleeve 8, a washer 9, and a nut 10. The spacer sleeve 8 extends from the rear of the storage box 3 to the washer 9. The eye 23 of the eyebolt 7 is located in the interior 4 of the storage box 3. The eyebolt 7 has a shank 27 that extends through the wall of the storage box 3 to the outside of the storage box 3. The shank 27 projects through the spacer sleeve 8 and the washer 9 and is screwed into the nut 10. The nut 10 secures the spacer sleeve 8 and the washer 9 to the shaft 27 of the eye bolt 7. The spacer sleeve 8 determines the position of the washer 9 on the shaft 27.Because the eye bolt 7 forms both the bearing for the load-bearing element 11 and part of the anchor 6, a simple construction with few individual parts is achieved.

[0021] According to the invention, a locking element 12 is provided which secures the load-bearing element 11 in its unfolded position 31 ( Figs. 3 and 4 ) secures. In the Figs. 1 and 2The locking element 12 is in its unlocked position 18. In the exemplary embodiment, the locking element 12 is movably mounted on a guide element 13 in the direction of a longitudinal center axis 16 of the eyebolt 7. The longitudinal center axis 16 is advantageously oriented vertically in the installed state. The longitudinal center axis 16 preferably coincides with the longitudinal center axis of the anchor 6. The locking element 12 is mounted on the guide element 13 by a bearing section 21. In the exemplary embodiment, the guide element 13 forms a stop for the locking element 12. For this purpose, the guide element 13 has a stop section 26 that interacts with the bearing section 21 of the locking element 12. In the embodiment shown in Fig. 1 In the unlocking position 18 shown, the bearing section 21 has a distance a to the stop section 26.

[0022] How Fig. 1As also shown, the locking element 12 is acted upon by a spring 14. In the exemplary embodiment, the spring 14 is designed as a compression spring and is supported at one end by the storage box 3 and at the other end by the locking element 12.

[0023] As the Figs. 1 and 2 As shown, the locking element 12 in the exemplary embodiment is provided with four claws 22. In the exemplary embodiment, the claws 22 are arranged evenly around the longitudinal center axis 16 and project downwards on both sides of the eye 23. In the folded position 30 of the load-bearing element 11, two of the four claws 22 are acted upon by the load-bearing element 11. This holds the locking element 12 in the unlocked position 18, even though the locking element 12 is pressed towards the locked position 17 by the spring 14.

[0024] The Figs. 3 and 4The figures show the arrangement with the locking element 12 in its locked position 17 and the load-bearing element 11 in the unfolded position 31. As the Figs. 3 and 4 As shown, the claws 22 extend on both sides of the pivot axis 19 at the end faces of the load-handling device 11. The sides of the claws 22 facing the load-handling device 11 form locking contours 20 that project into the pivot path of the load-handling device 11 and thereby prevent the load-handling element 11 from pivoting into the Figs. 1 and 2 The unlocking position 18 shown is prevented. The spring 14 holds the locking element 12 in its locked position 17. The bearing section 21 of the locking element 12 rests against the stop section 26 of the guide element 13. This secures the locking element 12 in its position.

[0025] How Fig. 4As shown, the eye 23 of the eye bolt 7 extends between the claws 22. The claws 22 may have recesses in the area of ​​the eye 23. In the locking position 17, the claws 22 extend in pairs on opposite sides of the pivot axis 19. This prevents the load-handling device 11 from pivoting in either direction.

[0026] The load-bearing device 1 is embedded flush with a ceiling surface 28 in the surrounding concrete. The interior 4 of the storage box 3 is closed by the lid 5, and the load-bearing element 11 is in its folded position 30, as shown in the Figs. 1 and 2As shown. For elevator installation, the cover 5 is removed. This causes the load-bearing element 11 to pivot automatically into its unfolded position 31 due to its own weight. In the unfolded position 31, the locking element 12 is no longer held in its unlocked position 18 by the load-bearing element 11. As a result, the locking element 12 automatically moves into its locked position 17. In the exemplary embodiment, the spring 14 is provided for support. If the locking element 12 is sufficiently heavy, the spring 14 can be omitted. In the locked position 17 of the locking element 12, the locking contours 20 of the claws 22 block the load-bearing element 11 from pivoting about the pivot axis 19. This allows an eyelet, hook, or the like to be conveniently attached to the load-bearing element 11 in this position, even from a remote location.After completion of the work, the locking element 12 can be returned to its unlocked position 18 against the force of the spring 14, for example by hand, and then the load-bearing element 11 can be pivoted from the unfolded position 31 to the folded-in position 30. In the folded-in position 31, the load-bearing element 11 can be secured by the cover 5 or an additional securing device, for example a bolt to be fixed to the storage box.

[0027] In the exemplary embodiment, the locking element 12 is mounted so as to be displaceable in the vertical direction. In an alternative design, displacement in another direction can also be provided. With displacement in the vertical direction, where the locking element 12 in the locked position 17 is below its position in the unlocked position 18, the locking element 12 can be easily designed so that it automatically moves into the locked position 17.

[0028] In the exemplary embodiment, a rigid ring is provided as the load-bearing element 11. However, a different design of the load-bearing element 11 may also be advantageous. The load-bearing element 11 is preferably rigid, so that bending of the load-bearing element 11 when eyelets, hooks, or the like are attached is prevented. Alternatively, the load-bearing element 11 can also be a pivotally mounted rope loop.

Claims

1. Load-bearing device comprising a storage box (3) for embedding in concrete (2) and at least one load-bearing element (11), wherein the load-bearing element (11) is pivotable about a pivot axis (19) between a folded-in position (30) and a folded-out position (31), wherein the load-bearing element (11) is arranged in an interior space (4) of the storage box (3) in the folded-in position (30) and protrudes out of the interior space (4) at least in part in the folded-out position (31), wherein a locking element (12) is provided that secures the at least one load-bearing element (11), in the folded-out position (31), against pivoting into the folded-in position (30), wherein the locking element (12) has a locking position (17), in which the locking element (12) secures the load-bearing element (11) against pivoting into the folded-in position (30), and an unlocking position (18), in which the load-bearing element (11) is pivotable about the pivot axis (19), wherein the storage box (3) comprises a cover (5), wherein when the cover (5) of the storage box (3) is removed the load-bearing element (11) falls into the folded-out position (31) on account of gravity when the load-bearing device (1) is embedded in concrete and the load-bearing device (1) in this case ends flush with a ceiling surface (28) that defines the space located therebelow, wherein upon adjustment of the load-bearing element (11) into its folded-out position (31) the locking element (12) automatically assumes the locking position (17) when the load-bearing device (1) is embedded in concrete and the load-bearing device (1) in this case ends flush with a ceiling surface (28) that defines the space located therebelow, wherein the locking position (17), when the load-bearing device (1) is embedded in concrete and the load-bearing device (1) in this case ends flush with a ceiling surface (28) that defines the space located therebelow, is assumed owing to the force of a spring (14) and / or owing to the weight force of the locking element (12), characterised in that the locking element (12) is mounted so as to be displaceable transversely to the pivot axis (19) of the load-bearing element (11).

2. Load-bearing device according to claim 1, characterised in that the locking element (12) is spring mounted in the direction towards its locking position (17).

3. Load-bearing device according to claim 2, characterised in that the locking element (12) is acted upon by a spring (14) which is configured as a compression spring and is supported with one end against the storage box (3) and with the other end against the locking element (12).

4. Load-bearing device according to any of claims 1 to 3, characterised in that the locking element (12) is held by the load-bearing element (11) in the unlocking position (18), in the folded-in position (30) of the load-bearing element (11).

5. Load-bearing device according to any of claims 1 to 4, characterised in that the locking element (12) is mounted so as to be displaceable perpendicularly to the pivot axis (19) of the load-bearing element (11).

6. Load-bearing device according to any of claims 1 to 5, characterised in that the load-bearing device (1) comprises an eye screw (7), wherein the load-bearing element (11) is pivotably mounted in an eye (23) of the eye screw (7).

7. Load-bearing device according to claim 6, characterised in that the locking element (12) is displaceably mounted on a shank (17) of the eye screw (7).

8. Load-bearing device according to claim 7, characterised in that a guide element (13) is provided, with which the locking element (12) is mounted on the eye screw (7).

9. Load-bearing device according to claim 8, characterised in that the guide element (13) forms a stop for the position of the locking element (12) in the locking position (17).

10. Load-bearing device according to any of claims 1 to 9, characterised in that the storage box (3) comprises at least one anchor (6) for anchoring in the concrete (2).

11. Load-bearing device according to claim 10, characterised in that the anchor (6) comprises a washer (9) and a nut (10), wherein the washer (9) is in particular arranged on the eye screw (7) and secured with the nut (10) relative to the eye screw (7).

12. Load-bearing device according to claim 11, characterised in that the eye screw (7) is fixed on the storage box (3) via the nut (10).

13. Load-bearing device according to any of claims 1 to 12, characterised in that the load-bearing element (11) is configured to be rigid, wherein the load-bearing element (11) is in particular a rigid ring.

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