RETAINING ELEMENT WITH EYELET, BASE BODY AND STOP FORMING ELEMENT
The retaining element with a stop element and eyelet design addresses shifting and wear issues, providing secure and efficient lifting of heavy loads by preventing movement and ensuring even stress distribution, enhancing safety and durability.
Patent Information
- Application Number
- FR2024007919
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-07-20
- Filing Date
- 2024-07-18
- Publication Date
- 2025-01-24
AI Technical Summary
Existing retaining elements for heavy loads, such as concrete formwork elements, suffer from unreliable prevention of shifting, wear, and tear, and require multiple parts that can be lost, leading to unsafe and inefficient lifting operations.
A retaining element with an eyelet and a base body, featuring a stop element with lateral extensions larger than the base body, allowing secure attachment to a beam and preventing movement during lifting, made in one piece to avoid lost parts, and ensuring even stress distribution.
Enhances safety and efficiency by preventing unwanted shifting and wear, ensuring secure lifting without spare parts, and improving the strength and durability of the retaining element.
Smart Images
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Abstract
Description
Title of the invention: RETAINING ELEMENT WITH EYELET, BASE BODY AND STOP FORMING ELEMENT technical field
[0001] The present invention relates to a retaining element comprising an eyelet and an elongated base body, preferably cylindrical, and a stop element.
[0002] When loading heavy and bulky loads, such as concrete formwork elements, onto trucks, straps and belts are often used to secure the formwork elements. However, unwanted slippage of the straps and belts is not reliably prevented, inevitably leading to workplace accidents. Abrasion also causes significant wear on the straps and belts, which is why they often need to be replaced. When lifting straight or pre-curved formwork elements with straps and belts, unwanted deflection of the formwork elements often occurs. Previous technique
[0003] In addition to the aforementioned straps and belts, retaining elements are known that have an eyelet and a base plate, the eyelet and base plate being connected to each other by a base body. These retaining elements, for example, safety bolts, are often made in several parts, with a safety pin, for example, passing through the eyelet. This has the disadvantage that the safety pin is often lost and must be replaced. Description of the invention
[0004] The object of the present invention is to improve the retention elements described.
[0005] The objective of the present invention is achieved according to the present invention by means of the characteristics in particular of claim 1.
[0006] The retaining element according to the present invention, having the characteristics described in the preamble, is therefore particularly characterized in that a lateral extension of the stop element in at least two directions transverse to each other is greater than the lateral extension of the base body. The retaining element can, for example, be used to load concrete formwork elements. For this purpose, a beam, comprising a housing through which the retaining element can be passed from below, is fixed to the concrete formwork elements. For lifting, a hook can be hung in the eyelet of the retaining element. The stop element of the retaining element thus prevents the retaining element from passing completely through the housing. beam. During lifting, a tension is exerted on the retaining element and transmitted to the beam via the stop element, causing the concrete formwork element to lift. The retaining element can be made in one piece, thus eliminating the need for spare parts that could be lost.
[0007] In an advantageous embodiment, the eyelet is formed in an extension of the base body. This may, for example, allow the eyelet to have a larger diameter than the base body and create sufficient space to accommodate large hooks.
[0008] In an advantageous embodiment, the eyelet is provided to have a, preferably first, lateral extension that corresponds to the lateral extension of the base body. This can, for example, allow the extension and the base body to have the same dimensions in one direction and, for example, be inserted into a housing that also has the same dimensions. Alternatively, or additionally, a, preferably second, lateral extension of the eyelet is provided to be larger than a lateral extension of the base body. This can, for example, allow the eyelet and the stop element to be inserted into a housing that has an extension of the base body in one direction and a larger extension in another direction. By rotating the retaining element by, for example, 90°, an undesired fall of the retaining element can be prevented.
[0009] In an advantageous embodiment, the eyelet is closed all around. This can, for example, prevent a hook inserted into the eyelet from being moved through an opening in the eyelet located on its periphery.
[0010] In an advantageous embodiment, the stop element is provided to be a base plate. This can, for example, allow a beam to be lifted to rest uniformly on a flat surface of the base plate. In particular, the stop element can be provided to be a round base plate. This can, for example, prevent the retaining element from falling through a housing or opening whose diameter is smaller than the base plate.
[0011] In an advantageous embodiment, a lower face of the eyelet is parallel to an upper face of the base plate. This can, for example, allow a tensile or compressive stress on the retaining element to be applied uniformly to the lower face of the eyelet and the upper face of the base plate.
[0012] In an advantageous embodiment, the eyelet is provided to have a preferably round engagement area. This can, for example, allow the tensile load of a hook attached to the eyelet to be distributed evenly across it. This has a positive effect on the service life of the retaining element.
[0013] In an advantageous embodiment, the stop element is provided to have a diameter greater than the maximum extension of the eyelet. This can, for example, allow the stop element to limit the insertion of the retaining element into a recess corresponding to the maximum extension of the eyelet in one direction. The retaining element can therefore be inserted with the eyelet forward into such a recess, but at most as far as the stop element.
[0014] In an advantageous embodiment, the retaining element is made of a single piece. This may, for example, allow the retaining element to function without additional parts that could be lost. Furthermore, it may allow the retaining element's strength, for example, its tensile, compressive, shear, bending, and torsional loads, to be greater than that of known retaining elements made of several parts. The described retaining element is preferably solid and made of steel or cast iron.
[0015] To achieve the objective of the present invention mentioned in the preamble, it is also proposed to use a retaining element for slinging cladding to a lifting device. In this embodiment, a retaining element according to the present invention is attached to cladding, for example, a concrete formwork element, and is lifted by means of a lifting device, for example, consisting of several hooks and chains. This can, for example, allow for the safe and rapid loading of cladding.
[0016] In order to achieve the object of the present invention mentioned in the preamble, the use of a retaining element is also proposed according to the present invention, wherein the retaining element is introduced into, in particular, a housing in a suitable traction direction. This can, for example, prevent the retaining element from slipping through the housing in the suitable traction direction. Brief description of the figures
[0017] The present invention is now described in more detail with the aid of embodiments, but is not limited to said embodiments. Other embodiments result from combining features of one or more claims with each other and / or with one or more features of the embodiments.
[0018] In the examples described, it can be seen that:
[0019] [Fig-1] [Fig.1] shows a retaining element in three-dimensional view,
[0020] [Fig.2] [Fig.2] shows the retaining element of [Fig.1] and a beam in view three-dimensional,
[0021] [Fig.3] [Fig.3] shows the retaining element inserted into the beam of [Fig.2] in three-dimensional view,
[0022] [Fig.4] [Fig.4] shows the retaining element inserted into the beam and rotated 90° in three-dimensional view,
[0023] [Fig.5] [Fig.5] shows the retaining element and the beam in side view,
[0024] [Fig. 6] [Fig. 6] shows the retaining element inserted into the beam in side view And
[0025] [Fig.7] [Fig.7] shows a retaining device with a retaining element and a concrete formwork. Detailed description of the invention
[0026] Figure 1 shows the retaining element 1 according to the present invention. The retaining element 1 has an eyelet 2 and an elongated cylindrical base body 3 with a stop element 22. The stop element 22 is in the form of a round base plate 4. A lateral extension 5 of the base plate 4 is larger than a lateral extension 6 of the base body 3 in at least two directions transverse to each other. The eyelet 2 and the base plate 4 are arranged at opposite ends of the retaining element 1. At one end, the base body 3 has an enlargement 7 in which the eyelet 2 is formed. A surface 8 of the enlargement 7 is made flat on one side, so that said surface of the enlargement 7 can rest flat on a surface of a beam 9. The enlargement 7 is rounded at one side of the enlargement 7 located opposite the side made flat.
[0027] The eyelet 2 has a first lateral extension 10 which corresponds approximately to the lateral extension 6 of the base body 3. The eyelet 2 also has a second lateral extension 11 which is larger than the lateral extension 6 of the base body 3. The base plate 4 is round.
[0028] Figure 2 shows how the retaining element 1 is inserted into a beam 9 from below in a suitable tensile direction 21. The beam 9 has a recess 12 of width B, height H, and depth T, through which the retaining element 1 passes. The width B of the recess 12 corresponds at least to the second lateral extension 11 of the base body. The height H of the recess 12 corresponds at most to the length L of the base body 3, measured from an upper face 17 of the base plate 4 to a lower face 16 of the extension 7 of the surface 8. The depth T corresponds at least to the first lateral extension 10 of the base body 3 and to the lateral extension 6 of the base body 3, and at most to the second lateral extension 11 of the base body 3.
[0029] Figure 3 shows the retaining element 1 inserted into the beam 9. The round base plate 4 is dimensioned so that it cannot be guided through the housing 12 and thus limits the insertion of the retaining element 1. If an upward pull is exerted on the retaining element 1, it cannot be moved through the housing 12, because the base plate 4 strikes the beam 9 and prevents movement. Since the base plate 4 is round, even by rotating the retaining element 1, it is guaranteed that the retaining element 1 cannot be moved upwards through housing 12.
[0030] Figure 4 shows the retaining element 1 in a position rotated 90° around its longitudinal axis. In this position, if the retaining element 1 is pulled downwards, it is guaranteed that the retaining element 1 cannot be moved downwards through the housing 12, because the surface 8 of the enlargement 7 rests on the beam 9 and prevents movement.
[0031] Figure 5 shows a side view of the retaining element 1 and the beam 9. It can be seen that the length L of the retaining element 1, measured from the upper face 17 of the base plate 4 to the lower face 16 of the extension 7, must be at least as long as the height H of the beam 9 in order for the retaining element 1 to be rotated into its retaining position. The lower face 16 of the extension 7 is parallel to the upper face 17 of the base plate 4. The eyelet forms a round engagement region 18. The appropriate pulling direction 21 in which the retaining element 1 must be inserted into the recess 12 of the beam 9 is indicated by an arrow.
[0032] A diameter 19 of the base plate 4 is greater than a maximum lateral extension of the eyelet 2, so that the base plate 4 limits the movement of the retaining element 1 through an opening corresponding to the maximum lateral extension of the eyelet 2.
[0033] Fig. 6 shows a side view of the retaining element 1 inserted into the beam 9 in a retaining position rotated 90° around its longitudinal axis.
[0034] Figure 7 shows, by way of example, the use of four retaining elements 1 to lift a concrete formwork element 13. The retaining elements 1 are inserted into the slots 12 of the beams 9 from the bottom in the direction of tension 21 and are held in the eyelets 2 by hooks 14. When the load is lifted by means of chains 15, a tensile force is exerted on the retaining elements 1. The base plate 4 limits the upward movement of the retaining element 1, which results in a transmission of force to the beams 9 and the load is lifted.
[0035] In the case of a retaining element 1 comprising an eyelet 2, an elongated base body 3, preferably cylindrical, and a stop element 22, it is proposed that a lateral extension 5 of the stop element 22 in at least two directions transverse to each other is greater than a lateral extension 6 of the base body 3. List of digital references
[0036] 1 Retaining element
[0037] 2 Eyelet
[0038] 3 Basic body
[0039] 4 Base plate
[0040] 5 Lateral extension of the base plate
[0041] 6 Lateral extension of the basic body
[0042] 7 Enlargement
[0043] 8 Surface
[0044] 9 Beam
[0045] 10 First lateral extension of the eyelet
[0046] 11 Second lateral extension of the eyelet
[0047] 12 Housing
[0048] 13 Concrete formwork element
[0049] 14 Hook
[0050] 15 Chains
[0051] 16 Lower face of the enlargement
[0052] 17 Upper face of the base plate
[0053] 18 Plugging-in region
[0054] 19 Diameter of the base plate
[0055] 20 Lifting device
[0056] 21 Traction direction
[0057] 22 Stop element
[0058] B Housing width
[0059] H Height of the housing
[0060] T Housing depth
[0061] L Length
Claims
Claims
1. Retaining element (1) comprising an eyelet (2), an elongated, preferably cylindrical, base body (3) and a stop element (22), in which a lateral extension (5) of the stop element (22) in at least two directions transverse to each other is greater than a lateral extension (6) of the base body, characterized in that the retaining element (1) is made in one piece.
2. Retaining element (1) according to the preceding claim, characterized in that the eyelet (2) is formed in an enlargement (7) of the base body (3).
3. Retaining element (1) according to any one of the preceding claims, characterized in that the eyelet (2) has a, preferably first, lateral extension (10) which corresponds to the lateral extension (6) of the base body (3), and / or in that a, preferably second, lateral extension (11) of the eyelet (2) is greater than the lateral extension (6) of the base body (3).
4. Retaining element (1) according to any one of the preceding claims, characterized in that the eyelet (2) is closed over its entire circumference
5. Retaining element (1) according to any one of the preceding claims, characterized in that the stop element (22) is a base plate (4), preferably a round base plate (4).
6. Retaining element (1) according to any one of the preceding claims, characterized in that a lower face (16) of the widening (7) is parallel to an upper face (17) of the base plate (4).
7. Retaining element (1) according to any one of the preceding claims, characterized in that the eyelet (2) has an engagement region (18) which is preferably round.
8. Retaining element (1) according to any one of the preceding claims, characterized in that the stop element (22) has a diameter (19) greater than a maximum lateral extension of the eyelet (2).
9. Use of a retaining element (1) according to any one of the preceding claims for slinging cladding (13) at a lifting device (20).
10. Use of a retaining element (1) according to any one of the preceding claims 1 to 8, in particular use according to the preceding claim, characterized in that the retaining element (1) is introduced into, in particular a crosspiece, a housing (12) in a suitable pulling direction (21).