Transport hook

Abstract

The present invention relates to a transport hook for raising and moving a load, wherein the transport hook (1) comprises a lever portion (2) with a coupling element (4), by means of which the transport hook (1) can be connected to a lifting apparatus, and also comprises a hook limb (3), which, for the purposes of raising and moving the load (101), can engage in a hole (102) of the load (101). The hook limb (3) is connected to the lever portion (2) by means of an angled portion (14) such that an angle (α) of less than 90° forms between a line which extends from the coupling element (4) to a vertex (SP) of the angled portion (14) and a line which runs along the hook limb (3). The hook can grip a load through a small opening on an upwardly oriented surface and raise the load securely. The transport hook can be provided with different securing elements, which reliably prevent accidental release of the transport hook.

Description

[0001] The invention relates to a transport hook for lifting and moving a load, such as floor elements that are placed close together and are only accessible from above.

[0002] It's difficult to lift and move containers, frames, prefabricated parts, parts of modular structures, or other objects, such as machinery, that are installed or must be installed in such a way that they cannot be grasped from the side or bottom. It would be advantageous if the containers, etc., could be easily but securely connected to the lifting device at a top facing the lifting device.

[0003] US 2008 / 0292397 A1 discloses a flooring support structure comprising a plurality of longitudinally aligned boards that are fastened to one another. The flooring support structure has at least two coupling openings in the form of elongated holes that run parallel to each other at a predetermined distance. Alternatively, the double hook can engage laterally in the flooring support structure. A double hook can engage through the holes into the interior of the flooring support structure, and the double hook can be connected to a lifting device.

[0004] US Pat. No. 9,741,847 B2 discloses an industrial mat comprising a support structure and two holes. The holes can be used to support the industrial mat. Other known tools for lifting plate-shaped elements include, for example, channel hooks or pliers-like tools for gripping the plate-shaped element on its outer sides.

[0005] US Pat. No. 845,724 discloses a pin-shaped element attached to a base for insertion into a drilled hole in a stone block. The stone block can be lifted by frictional engagement in the drilled hole. The base protrudes laterally over the pin and rests against the surface of the stone block, creating a wedging effect.

[0006] DE 10 2016 222 787 A1 discloses a transport hook that can be inserted through a hole and engages behind the edge of this hole by means of a securing device.

[0007] US 1,373,438 discloses a self-clamping lifting device for lifting stone blocks. It comprises a pin-shaped body to which a leg is attached at a right angle. A clamping lever is pivotally attached to the leg. A coupling element for attaching a rope is provided at one end of the clamping lever. The other end of the clamping lever has an edge that is pressed against the surface of a stone block when the pin-shaped portion is inserted into a corresponding hole in the stone block.

[0008] US R E28 709 E relates to a lifting hook adapted to receive an end loop of a carrying rope and a safety flap pivotally mounted on the lifting hook and shaped to hold the end loop of the carrying rope on the hook.

[0009] JP S57 141979 U discloses a hook according to the preamble of claim 1, comprising an eyelet, a hook element, and a securing element. The eyelet is designed to receive a carrying rope or a carabiner. The hook element is designed to engage behind a hole in a load, and the securing element is designed to secure the hook in the hole.

[0010] JP H01 132686 U shows a hook with a particularly wide opening and a pivoting flap to further increase the gripping circumference of the hook, so that relatively large objects can be gripped with the hook.

[0011] JP S57 57188 ​​A describes a hook that can engage a hole in a metal plate to lift it. The hook has a narrow opening, and the hole is characterized by its elliptical shape.

[0012] FR 2 677 969 A1 discloses a device for suspending a load to be handled. At least three hooks are provided, each of which engages a hole at one end of the load and engages behind a projection on the hole. The hooks are each connected via a rope to a ring, which is lifted.

[0013] GB 2 417 521 A shows a lifting hook which is provided with a locking pawl.

[0014] The locking pawl is connected to a pulling element so that the locking pawl automatically closes an opening in the lifting hook as soon as, for example, a rope has been inserted into the opening.

[0015] The object of the invention is to provide a transport hook and a lifting system with which a load can be securely gripped, lifted, and safely moved within a space. A further object is to provide a suitable method.

[0016] These objects are solved by the subject matter of independent claim 1.

[0017] Advantageous embodiments are specified in the subclaims.

[0018] The invention is explained in more detail below with reference to the figures. The figures show exemplary embodiments of a transport hook, without limiting the scope to these exemplary embodiments.

[0019] The figures show in detail: Figure 1: Transport hook with safety device in a side view; Figure 2: Transport hook of the Figure 1 without safety device in a perspective view; Figure 3: Top view of the transport hook of the Figure 2 ; Figure 4a-4c: Transport hook of the Figure 2from the side and in a sectional view along a central longitudinal axis; Figure 5: Transport hook with securing element pre-tensioned into the securing position; Figure 6: Transport hook with securing element that is pressed into the securing position by means of the securing device and held there; Figures 7a-7c: Sketch of a lifting system with two or three transport hooks; Figures 8a-8d: Sketch of the process steps for gripping and lifting a load with a transport hook; Figures 9a, 9b: Transport hook with another securing element in the release position and securing position; and Figures 10a-10c: Transport hook with securing device with wings and nose.

[0020] The Figure 1 shows a transport hook 1 with which a load 101, for example a floor element of an event tent, can be lifted.

[0021] The transport hook 1 comprises a lever section 2, a hook leg 3 and a retaining tab 6 which is connected to a securing device 7 with which the transport hook 1 can be secured in engagement with and in a partial penetration through a hole 102 of the load 101.

[0022] The lever section 2 has a free end 2a and a coupling opening 4 acting as a coupling element, near a free end 2a remote from the hook shank 3. An angled section 14 adjoins the hook shank 3 and connects the hook shank and the lever section 2. The angled section is bent so that the lever section 2 and the hook shank 3 are arranged at an angle to each other.

[0023] The lever section 2 has an engagement region 15 adjacent to the angle section 14, which has substantially the same cross-sectional shape as the angle section 14 and the hook leg 3 in order to engage in a hole 102 of a load 101 in certain situations, as will be explained in more detail below.

[0024] In the present exemplary embodiment, the engagement region 15, the angled section 14 and the hook leg 3 have an approximately circular cross-section, which has slightly flattened surfaces 16 on the sides. Preferably, the cross-section is formed essentially without edges, so that it can rotate freely in a hole 102 about a hole axis 105, which runs centrally through the hole 102 and is perpendicular to a plate-shaped section of the load in which the hole 102 is made. Essentially without edges means that only an obtuse angle of, for example, more than 100° and in particular more than 150° is formed at the edges. With such edges, the risk of hooking with projections formed on the edge of the hole is low. Thus, the flattened surfaces 16 in the Fig. 1In the embodiment shown, the surfaces are approximately circular in cross-section and each have edges 17 which enclose an obtuse angle such that there is no danger of entanglement.

[0025] The hook leg 3 is formed from an engagement portion 3a and a free end 3b remote from the angle portion, which has a blunt shape, for example in the form of a spherical segment.

[0026] In the exemplary embodiment, the transport hook 1 is formed in one piece or is molded from a single piece. This means that the transport hook 1 is, for example, cut from a sheet material, manufactured using a casting process, pressed from powder, or forged from a semi-finished product.

[0027] The securing device 7 comprises a fastening plate 7a and a securing part, which in the present embodiment is formed from a hollow cylinder 7b and a securing rod 7c with a free end 7d. The securing part further comprises a handle 9 connected to the securing rod 7c. The hollow cylinder 7b has an internal thread, and the rear region of the securing rod 7c has an external thread, which engage with each other. A lock nut 7e fixes the disc-shaped handle 9 to the securing part, and the relative position of the securing rod 7c to the hollow cylinder 7b can be adjusted. This allows the length of the securing part to be adjusted and adapted to the size of the hole 102 of a load 101 to be lifted with the transport hook 1.

[0028] The hollow cylinder 7b is slidably mounted in a through-bore 10 of the retaining tab 6. A compression spring (not shown) is arranged in the through-bore 10, which is supported on the mounting plate 7a and applies a force to the securing part 7b, 7c, 7e, which pushes the securing part away from the retaining tab 6.

[0029] The safety rod 7c is slidably mounted in a through-hole 8 which extends through the angle section 14 and opens onto the hook leg 3 on the side remote from the retaining tab 6, so that the safety rod protrudes with its free end 7d from the hook leg 3 in a securing position ( Fig. 1 ).

[0030] The through holes 8, 10 are aligned with each other, ie a central axis A10 of the hole 10 coincides with a central axis A8 of the hole 8.

[0031] In the present embodiment, the handle 9 also serves as a stop for limiting the movement of the securing part 7b, 7c, 7e between the securing position and a release position.

[0032] In the locking position, the locking pin 7c protrudes from the hook shank 3 with its free end 7d, and the handle 9 abuts the lever section 2 at the engagement area 15. In the release position, the locking pin 7c is fully retracted with its free end 7d into the through-hole 8 of the transport hook 1, and the handle 9 abuts the retaining tab 6. The locking part can thus telescope out and in with respect to the through-hole 10.

[0033] In this release position, the safety rod can optionally be secured using a locking mechanism (not shown), so that the safety rod is advantageously protected from damage, for example, in storage or during transport of the transport hook to a site of use. This locking mechanism can be activated, for example, by rotating the safety part around its longitudinal axis using handle 9. The locking mechanism can also be designed so that the safety part can be secured in the locking position using handle 9 or in another way, preventing it from accidentally moving back into the release position.

[0034] The mounting plate 7a can have a through-hole through which the locking part protrudes rearward beyond the locking plate 7a in the release position. This through-hole then forms a further linear guide for the locking part. In the present embodiment, the mounting plate 7a is designed without a through-hole. As an alternative to the handle 9, the mounting plate can form a stop for the locking part to limit its movement into the release position.

[0035] The angled section 14 connects the engagement area 15 to the hook shank 3 at an angle, wherein the angle is less than 90° in the exemplary embodiment. In other embodiments of the transport hook, the angle can be approximately 90° or 90°. A connecting line V extends through a coupling point and a vertex SP of the angled section 15. The coupling point is the connection point at which, for example, a lifting device engages in order to lift the transport hook 1. In the present exemplary embodiment, the coupling point is the center point 4A of the coupling opening 4, in which the transport hook 1 can be connected to the lifting device 200. The vertex SP is arranged on the inner surface of the angled section. A hook line HL runs along the inside of the hook shank 3. The connecting line V and the hook line HL intersect at an angle α which is less than 90° and preferably less than 85° and in particular less than 80°.is less than 75°.

[0036] The smaller the angle α, the more the hook leg 3 engages behind a plate-shaped section of a load in which the transport hook 1 is suspended in a hole and the less it is necessary to arrange the lever section 2 perpendicular to the plate-shaped section of the load.

[0037] The hook leg 3 may partially have a sheath or coating 13, which, for example, has an anti-slip surface and / or is made of an elastic material in order to mitigate or prevent damage to the hole edges.

[0038] The Figure 2 shows the transport hook 1 of the Figure 1 in a perspective view without the safety device 7. In the Figure 2The through hole 10 is visible within a receptacle 6a for the securing device 7, and fastening points 11 in which the fastening plate 7a can be connected to the transport hook 1, for example, screwed or positively received via corresponding connecting elements not shown. In addition, the Figure 2 the through hole 8 for the safety rod 7c.

[0039] In the exemplary embodiment, the lever section 2 is designed as a flat body, i.e., it has two flat side walls 12 that run essentially parallel to each other. The side walls 12 can also run at an angle to each other, so that a thickness H ( Figure 3 ) and / or a width B of the lever section 2 changes.

[0040] The lever section 2 has a first width B1 directly adjacent to its engagement section 15 and a second width B2 near the free end 2a, which is approximately twice as large as the width B1. In the exemplary embodiment, the transition from the first width B1 to the second width B2 is stepped, but the widening of the lever section 2 over its length can also be continuous.

[0041] The widening is designed in such a way that it points to the same side as the hook shank 3. As a result, the center of the coupling opening 4 can be slightly offset from a central longitudinal axis MLA ( Fig. 4a)) of the remaining lever section 2. In the present exemplary embodiment, the offset corresponds approximately to the radius of the coupling opening 4. Since the offset with respect to the central longitudinal axis MLA is directed towards the side on which the hook shank 3 is arranged, the angle α explained above between the connecting line V and the hook line HL is smaller than without offset, whereby the angling or engagement by the hook shank 3 is more pronounced.

[0042] The Figure 3 shows the transport hook 1 of the Figure 2 in a plan view. The transport hook 1 of the exemplary embodiment has a substantially uniform thickness H over its entire length L. This means that a diameter D of the substantially round or circular hook shank 3 corresponds to the thickness of the flat lever section 2. The thickness H can also vary, for example, be smaller at the free end 2a than near the free securing end 3c.

[0043] The transport hook 1 is related to a central longitudinal plane MLE (MLE is perpendicular to the plane of the drawing of Fig. 3 ) mirrored. This means that the transport hook 1 can consist of two cast or molded parts that are joined, for example, welded together. This allows the formation of the through holes 8 and 10 in the respective halves, thus eliminating the need for reworking of the transport hook 1.

[0044] The top view of the Figure 3 shows how the Figure 2 the through hole 8 for the safety rod 7c of the safety device 7, the through hole 10 and the fastening points 11.

[0045] The Figure 4comprises a figure a) showing the transport hook 1 in a side view, a figure b) showing a further embodiment of the transport hook 1 with a free securing end 3e on the hook shank 3, and a figure c) showing a section through the transport hook 1 of figure a) along the central longitudinal plane MLE and parallel to the side walls 12. The transport hook of figure c) comprises an optional magnet 19, in particular a permanent magnet, which additionally secures the transport hook 1 in the hole 102 if the load 101 consists of a magnetic metal or comprises a metal that is attracted by the magnet 19.

[0046] The Figure 4a essentially corresponds to the illustration of the transport hook 1 in the Figure 1 , only without safety device 7. Therefore, please refer to the description of Figure 1 referred to.

[0047] The Figure 4bshows an alternative embodiment of the transport hook 1. This transport hook 1 comprises a securing device in the form of a free securing end 3e, which is connected to the engagement section 3c. The free securing end 3e protrudes from the engagement section 3c in a direction away from the lever section 2 and extends in the longitudinal direction of the transport hook 1. The free securing end 3e and the engagement section 3c thus form a type of double nose, which reliably secures the transport hook 1 in the hole 102 of the load 101 when the transport hook 1 is not, or not yet, subjected to a tensile force by the transport device.

[0048] The Figure 4c shows a section through the transport hook 1 of the Figure 4awithout the securing device 7. In this illustration, the paths of the through-holes 8 and 10 within the hook shank 3 and the retaining tab 6 can be seen for the first time. It is obvious that the central axis A10 of the through-hole 10 and the central axis A8 of the through-hole 8 are aligned, i.e., the two central axes A8 and A10 coincide. This allows the through-holes 10 and 8 to be created in two work steps from one side, starting with the through-hole 10. It is also possible to drill the through-hole 10 and the through-hole 8 simultaneously with two tools from opposite sides.

[0049] Furthermore, a magnet 14 is connected to the transport hook 1, for example, glued on or connected by force and / or form fit. The magnet 14 provides additional security if the load 101 to be lifted consists of a magnetic material or comprises magnetic material, for example, metal particles in a reinforced plastic. The magnet 14 is preferably a permanent magnet that secures the transport hook 1 to the load 101 and easily detaches from the load 101 when the load 101 is lifted under a preferably predeterminable weight force.

[0050] The Figure 5shows a transport lever 1 without a retaining tab 6 for connection to a securing device 7. To secure the transport hook 1 in a hole 102 of a load 101, the transport hook 1 comprises a securing element 5 in the region of the hook shank 3, which is connected to the engagement section 3c in the pivot joint S. The securing element 5 is elastically pretensioned into the illustrated securing position and can be pressed against the tension force, for example by hand, against the hook shank 3 in order to be inserted together with the hook shank 3 or the engagement section 3c into the hole 102 of a load 101. Once the securing element 5 has been completely passed through the hole 102, it is automatically moved by the elastic force into the illustrated securing position and thereby secures the transport hook 1 in the hole 102 of the load 101.

[0051] The Figure 6shows a transport lever 1 with the securing device 7 and the securing element 5, which in this case is elastically preloaded into a release position in which it rests against the hook shank 3. From this position, it can be moved by the securing device 7 against the elastic force into the illustrated securing position. To do this, the securing rod 7c presses with the free end 7d onto the securing element 5, moving it into the illustrated securing position and securing it in this position.

[0052] To fix the securing element 5 in the securing position, the securing rod 7c can be secured in the position shown, for example by means of a locking mechanism (not shown) via the handle 9. For example, the handle 9 can be rotated on the securing rod 7c to secure it in the telescopically extended position. To remove the transport hook 1 from the hole 102 of the load 101, all that is needed is to release the securing rod 7c using the handle 9. The elastic restoring force acting on the securing element 5 can then press the securing element 5 back into the release position, whereby the securing rod 7c is simultaneously moved back into the through-bore 8 if the spring force of the securing element 5 is greater than the spring force applied to the securing rod 7c.

[0053] If a locking mechanism is provided to secure the securing part in the locking position and in the release position, then the spring for loading the securing part 7b, 7c, 7e can be omitted entirely. This applies to all of the embodiments explained, since the securing part is then held in a defined position both in the locking position and in the release position without a spring. However, loading with a spring is advantageous, since the securing part always automatically assumes a specific position. The spring can also be arranged such that the securing part is pushed into the release position. In this case, however, a locking mechanism should be provided that can secure the securing part in the locking position.

[0054] A transport hook 1 according to a further embodiment is formed with a movable safety lever 20 on the lever section 2 ( Fig. 9a, 9b). The safety lever 20 is pivotally mounted by means of a pivot joint 21 adjacent to the coupling opening on the side of the lever section 2 from which the hook shank 3 also extends. The safety lever 20 can be folded away from the hook shank 3 until the safety lever strikes the hook shank with a stop element 22 and further pivoting movement is blocked ( Fig. 9b ).

[0055] In the release position ( Fig. 9a ), the safety lever 20 rests directly on the lever section 2. The transport hook 1 can thus be inserted into a hole 102 of a load 101 with the hook shank 3 and pulled out again, wherein the lever section 2 is arranged approximately parallel to the surface of the load 101 for this purpose.

[0056] In the safety position, the safety lever 20 protrudes from the lever section 2 on the same side as the hook shank 3 ( Fig. 9b). As a result, the hook shank engages behind an edge of the hole 102 of a load 101. The lever section 2 cannot be brought to the surface of the load 101, so that the transport hook 1 cannot be removed from the hole 102.

[0057] The safety lever 20 thus forms a movable safety part on the transport hook 1, with which the transport hook can be secured at the hole 102.

[0058] The safety lever can be secured in its end positions with a corresponding fixing device. This fixing device (not shown) can, for example, comprise a spring arranged between the lever section 2 and the safety lever 20, forcing them apart. A fixing ring can wrap around the lever section 2 and be displaced along the lever section, so that it also encloses the safety lever 20 resting against the lever section 2 and holds it in its position resting against the lever section 2 ( Fig. 9a) is secured. The safety lever 20 can be released by moving the locking ring towards the hook leg 3. Instead of the spring or in addition to the spring, locking means can be provided which lock the safety lever in its end positions according to Fig. 9a and / or Fig. 9b Instead of a pivotable safety lever, another movable safety part that is not pivotable can also be provided, which can form a projection that can be changed from the lever section 2.

[0059] The Figure 7 shows in the sketch a) by way of example a first lifting system 100, which carries a plate-shaped load 101 or a structure with a plate-shaped section. The load 101 comprises three essentially circular holes 102 with a diameter slightly larger than the diameter D of the hook shank 3 ( Figure 3) of the transport hooks 1, which pass through the holes 102 of the load 101. The transport hooks 1 can be connected to a lifting device 200, which is shown as a directional arrow in sketch a), via ropes or chains 103. The ropes 103 can be connected to the lifting device 200, for example, a crane, directly or via a connecting element 104.

[0060] Sketch b) shows a second lifting system 100 that supports a plate-shaped load 101 or a structure with a plate-shaped section. The structure 101 comprises four essentially circular holes 102 with a diameter slightly larger than the diameter D of the hook shank 3 ( Figure 3) of the transport hooks 1, which pass through the holes 102 of the load 101. The transport hooks 1 can be connected to a lifting device 200, which is shown as a directional arrow in sketch b), via ropes or chains 103. The ropes 103 can be connected to the lifting device 200, for example, a crane, directly or via a connecting element 104.

[0061] Sketch c) shows a lifting system 100 with a load 101 in the form of a box or a hollow body. Two holes 102 are provided in the top side 101 of the load 101, which forms a plate-shaped section, into which the transport hooks 1 engage. The transport hooks 1 are, as shown in sketches a) and b), Figure 7 connected to a lifting device 200 via ropes 103.

[0062] In the Figure 8Four hand-drawn sketches show the process steps necessary to grip and lift a load 101 with a substantially circular hole 102 in a plate-shaped section using one or more transport hooks 1.

[0063] Sketch a) shows the transport hook 1 with the lever section 2 and the hook shank 3, as it is, for example, manually guided to the circular hole 102 of the load 101. In sketch b), the hook shank 3 is guided through the circular hole 102 of the load 101 and protrudes downwards from the plate-shaped load 101. The lever section 2 of the transport hook 1 lies essentially flat on the upper side 101a of the load 101.

[0064] In the sketch c), the transport hook 1 is connected via the coupling opening 4 to a lifting device 200, which is shown in the sketch c) as a directional arrow, for example a crane, and the transport hook 1 is subjected to a tensile force, whereby the transport hook 1 rotates in the hole 102 of the load 101 about a lower edge of the inner circumferential wall 104 and the hook shank 3 is pivoted towards a bottom side 101b of the load 101. The position shown in the sketch c) is assumed by the transport hook 1 as the end position when the load 101 is lifted with one of the lifting systems 100 of the Figure 7 with several holes 102 and several transport hooks 1. Also drawn in sketch c) is the straight line V, which connects the point of application of the lifting device 200 on the lever section with the vertex SP of the angle section 14. The angle α between the straight line V and a second straight line on the upper side of the hook shank is less than 90°.

[0065] In sketch d), the single transport hook 1 has been moved by the lifting device 200, which is shown in sketch d) as a directional arrow, into a final position in which the transport hook 1 supports the weight of the load 101. The load 101 hangs essentially vertically downwards from the transport hook.

[0066] In the Figures 8a) to 8d In the embodiment shown in FIG. 1, the plate-shaped portion of the load 101 having the hole 102 is thin compared to the hook shank 3. For a thin load 101, which means that it is thin in the area of ​​the hole 102 compared to the thickness of the hook shank 3, it is sufficient if the hole 102 is only slightly larger than the cross-sectional area or the maximum diameter D of the hook shank 3.

[0067] However, heavier loads can also be lifted with the transport hook 1. The thicker the load 101 is in the area of ​​the hole 102, the larger the hole 102 must be so that the hook shank 3 and the angled section 14 can be inserted into the hole 102. This also depends on how strongly the hook shank 3 is bent relative to the lever section 2.

[0068] Tests have shown that the maximum hole diameter should preferably not be larger than twice the maximum diameter D of the hook shank 3, in particular not larger than 1.8 times the maximum diameter D of the hook shank 3 or not larger than 1.5 times the maximum diameter D of the hook shank 3 or not larger than 1.3 times the maximum diameter D of the hook shank 3, so that the hook shank and the angle section can be inserted into the hole on the one hand and cannot escape on the other hand when the transport hook is under tension during lifting.

[0069] The thickness of the load in the region of the hole 102 is preferably not greater than 2 times the maximum diameter D of the hook shank 3, in particular not greater than 1.5 times the maximum diameter D of the hook shank 3 or not greater than 1.3 times the maximum diameter D of the hook shank 3.

[0070] To prevent accidental escape, the maximum hole diameter should be smaller than one hook shank length HSL (Fig. 3 a)), which is the distance between the free end 3b of the hook shank and the side of the lever section 2 remote from the hook shank 3. The maximum diameter of the hole is preferably smaller than 0.8 times the hook shank length HSL, in particular smaller than 0.7 times the hook shank length HSL or smaller than 0.5 times the hook shank length HSL or smaller than 0.3 times the hook shank length HSL. This limits the maximum thickness of the load in the area of ​​the hole.

[0071] The hole 102 is preferably circular. It may also deviate from the circular shape, whereby it is expedient that the smallest hole diameter does not deviate from the largest hole diameter by more than 50%, preferably not more than 25%, and in particular not more than 10%.

[0072] The Figures 10a - 10cshow the transport hook 1 of the Figure 1 in a modified form. The transport hook 1 comprises the lever section 2 with the coupling opening 4 and the hook shank 3, which can pass through a hole 102 of a load 101 (both not shown) in order to lift and transport the load 101 by means of a lifting system 100 (not shown). The transport hook 1 comprises a securing device with which it can be secured in the hole 102 or is secured when the transport hook 1 is subjected to a tensile force by the lifting system 100, so that the transport hook 1 cannot be inadvertently moved out of the hole 102 when the securing device is active.

[0073] To prevent the transport hook 1 from being inserted too deeply into the hole 102, the transport hook 1 comprises a wing element 18, which can consist of two separate wings 18.1 and 18.2. The wing element 18 is connected to the transport hook 1 on an underside 2b of the transport hook 1 facing the hook shank 3, preferably firmly connected by means of adhesion, material or force fit, etc. The wings 18.1 and 18.2 are in a plan view of the transport hook 1, as shown in the Figure 10a ) shows, to the side of the transport hook 1. The transport hook 1 has a diameter D in the area in which the wing element 18 or the wings 18.1, 18.6 is / are connected to the transport hook 1 (see Figure 2). The distance AFF between the outer ends 18.1a, 18.2a, i.e., those facing away from the transport hook 1, can then, for example, correspond approximately to twice the diameter D of the transport hook 1 in this area. However, the distance AFF can also be larger or smaller. The distance AFF can also be referred to as the span of the wing element 18.

[0074] The wing element 18 can, in the state connected to the transport hook 1, protrude below the lower surface 2b of the lever section 2 or of the transport hook 1 in the vicinity of the connection area with the wing element 18, as shown, or be arranged in a recess not explicitly shown, so that the wing element 18 does not protrude beyond the underside of the transport hook 1, but is preferably flat with the surrounding surface of the transport hook 1.

[0075] The transport hook 1 further comprises a nose 23 formed on an upper side of the transport hook 1. In the illustrated embodiment, the nose 23 protrudes in a dormer-like manner from the upper side 2c facing away from the hook shank 3. The nose 23 has a flat front side 23a facing the retaining tab 6, which, in the illustrated embodiment, runs essentially parallel to the outer surface 6b of the retaining tab 6 facing the nose 23.

[0076] The nose 23 is connected to the transport hook 1 in the area in which an opening of the through-bore 8 is located, which forms an opening and guide for the securing rod 7c in the angled section 14. The nose 23 extends the through-bore 23, and the front side 23a advantageously forms a flat mounting surface for a drill for creating the through-bore 8 in the angled section 14 of the transport hook 1. At the same time, the nose extends the guide area for the securing rod 7c, and the securing rod 7c is better protected in the extended through-bore 8.

[0077] The upper side of the nose 23 can run parallel to a central longitudinal axis (not shown) of the securing rod 7c. The height HN of the nose 23 in the area of ​​the front side 23a, perpendicular to the central axis of the securing rod 7c, can be selected such that the nose 23 completely covers the handle 9 when viewed from the front onto the transport hook 1. This prevents the handle 9 from being accidentally released from the shown securing position when the load is being gripped or transported. Thus, the last-described nose 23 reliably prevents, for example, a rope of the lifting system 100 or an unevenness of the load 101 from accidentally moving the handle, thus jeopardizing the safety of the transport.

[0078] At its end facing the angled section 14, the nose 23 can have a distance NT from a tangent T, which rests on the surface of a frontmost end of the transport hook 1, which distance depends on the diameter D of the hook shank 3 and / or the angled section 14. The distance NT can preferably be approximately twice the diameter D. However, the distance NT can also be smaller or larger than twice the diameter.

[0079] As in the Figure 10b As shown, the height HN of the front side 23a can be determined by an extension part 24, which is part of the nose 23 and is molded together with the nose 23 or formed separately from the nose 23 and subsequently connected to the nose 23. In the latter case, the extension part 24 can be made of a different material from the material of the nose 23, for example a plastic, and can be replaced in the event of wear or damage.

[0080] The nose 23 can also comprise a securing element with which the securing rod 7c can be secured in the securing position and preferably also in the rest position. This securing element can be, for example, a slider that engages or snaps into recesses on the securing rod 7c. In one solution, the extension 24 can form the securing element. Other known mechanisms for securing the securing rod 7c in fixed positions relative to the through-bore 8 are encompassed by the invention. With such a solution, the retaining tab 6 can be omitted entirely, which leads to material and cost savings. Figure 10b shows an embodiment in which the handle 9 forms the end of the safety rod 7c.

[0081] Even if this is in the Figure 10bnot explicitly shown, the retaining tab 6 can be plate-shaped, with a thickness in the longitudinal direction of the transport hook 1 which is considerably smaller than in the Figure 10b shown, for example a steel plate with a thickness of 3 mm or 0.5 cm or 1 cm or another dimension. In this case, the spring element (not shown) which pretensions the securing rod 7c into the securing position or the rest position would lie outside the retaining tab 6 and be supported with one end on an outer side of the retaining tab and with the other end on the handle. The spring is preferably a helical spring which encloses the securing rod 7c. In this embodiment, no fastening plate 7a, as provided in the exemplary embodiments explained above, is necessary. The spring element can be protected against contamination by an elastic sheath. List of reference symbols

[0082] 1Transport hook 2Lever section 2aFree end 2bUnderside 2cTop 3Hook shank 3aEngaging section 3bFree end 3cFree securing end 4Coupling opening 4ACenter point 5Securing element 6Retaining tab 6aReceptacle 6bOuter surface 7Connecting device 7aFastening plate 7bHollow cylinder 7cSecuring rod 7dFree end 7eLock nut 8Through hole 9Handle 10Through hole 11Fastening point 12Side wall 13Coating 14Angle section 15Engaging area 16Flattened surface 17Edge 18Wing element 18.1aWing tip 18.2Wing 18.2aWing tip 19Magnet 20Securing lever 21Pivot joint 22Stop element 23Nose 23aFront 23bTop 24Extension 100Lifting system 101Load, structure 101aTop 101bBottom 102Hole 103Rope, chain 104Inner peripheral wall 105Hole axis 200Lifting device αAngle ASupport point AFFDistance B1First width B2Second width DDiameter HDickness HLHook line HNHeight NTDistance LLength SSwidth joint SPVertex TTangent VConnecting line MLECenter longitudinal plane A8Center axis A10Center axis αAngle

Claims

1. A transport hook (1) for lifting and moving a load (101), the transport hook (1) comprising a lever section (2) with a coupling element (4), with which the transport hook (1) can be connected to a lifting device, and a hook leg (3) which can engage through a hole (102) of the load (101), the hook leg (3) being connected to the lever section (2) by an angle section (14), a securing device being provided which comprises a securing part (7b, 7c, 7e) which is movably arranged on the transport hook (1) in such a way that it can form a projection so that a hook leg (3) inserted through the hole (102) can no longer escape from the hole (102), characterized in that the projection can be formed on the hook leg, the securing part (7b, 7c, 7e) has a securing rod (7c) which is mounted on the transport hook (1) so as to be displaceable in the longitudinal direction, and the angle section (14) has a through-hole (8) which forms a guide for the securing part (7b, 7c, 7e).

2. The transport hook (1) according to claim 1, wherein the hook leg (3) with the angle section (14) is connected to the lever section (2) such that an angle (α) is formed between a line (L) extending from the coupling element (4) to an apex (SP) arranged on the inner surface of the angle section (14) and a line (HL) extending along the hook leg (3), which is less than 90°, wherein the hook leg (3) and the angle section (14) form a continuous strand of approximately uniform thickness, so that for lifting and moving the load (101) the hook leg (3) and the angle section (14) engage in the hole (102) of the load (101) and the hook leg (3) or the angle section (14) can engage behind an edge of the hole (102).

3. The transport hook (1) according to claim 1 or 2, wherein at least the hook leg (3) is a round body with a substantially round cross-section.

4. The transport hook (1) according to any one of claims 1 to 3, wherein the coupling element is designed as a coupling opening (4) on the lever section (2) and / or the coupling element (4) is arranged on the free end (2a) of the lever section (2) facing away from the hook leg (3).

5. The transport hook (1) according to any one of claims 1 to 4, wherein the transport hook (1) is formed in one piece, for example cast, pressed from a powder, machined from a solid material or forged from a semi-finished product, and / or wherein the lever section (2) is plate-shaped and has a length (L) which is many times greater than a width (B) or thickness (H) of the lever section (2).

6. The transport hook (1) according to any one of claims 1 to 5, wherein the hook leg (3) is connected to the lever section (2) by an angle section (14), which is formed with an engagement area (15) adjacent to the angle section (14), wherein the engagement area (15), the angle section (14) and the hook leg (3) are each formed as a round body with a substantially round cross-section.

7. The transport hook (1) according to claim 6, wherein the diameter (D) of the engagement area (15), the angle section (14) and the hook leg (3) are substantially the same and in particular correspond to the thickness (H) of the plate-shaped lever section (2).

8. The transport hook (1) according to any one of claims 1 to 7, wherein a width (B) of the lever section (2) at a free end (2a) facing away from the hook leg (3) is greater than a width (B) of the lever section (2) adjacent to the hook leg (3), and / or wherein the lever section (2) is many times longer than the engagement section (3c) of the hook leg (3).

9. The transport hook (1) according to any one of claims 1 to 8, wherein the securing part (7b, 7c, 7e) is acted upon by means of a spring, so that it can be moved against the spring action in such a way that it does not form a projection on the hook leg (3) and the latter can be pulled out of the hole (102).

10. The transport hook (1) according to any one of claims 1 to 9, wherein the lever section (2) comprises a retaining lug (6), which is designed to retain the securing device (7).

11. The transport hook (1) according to any one of claims 1 to 10, wherein the securing part (7b, 7c, 7e) comprises a handle (9) for actuating the securing part (7b, 7c, 7e), wherein the handle (9) may also be designed as a stop for fixing one or both end positions of the movable securing part (7b, 7c, 7e).

12. The transport hook (1) according to any one of claims 1 to 11, wherein a latching mechanism is provided to releasably fix the movable securing part (7b, 7c, 7e) in one of its end positions.

13. The transport hook (1) according to any one of claims 1 to 12, wherein the transport hook (1) comprises a securing element (5) that secures the transport hook (1) in the hole (102) of the load (101).

14. The transport hook (1) according to claim 13, wherein the securing element (5) is connected to the hook leg (3) in a swivel joint (S) and is preferably elastically biased into a securing position in which it protrudes from the hook leg (3) or into a position in which it rests against the hook leg (3).

15. The transport hook (1) according to claim 13 or 14, wherein the securing element (5) can be placed against a surface of the hook leg (3) when the engagement section (3c) passes through the hole (102) of the load (101) and, after passing through the hole (102), pivots elastically into the securing position.

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