Clamping device

Abstract

The invention relates to a tensioning device, for example in the form of a push or pull ratchet, for use on tensioning straps and to a tensioning strap with such a tensioning device, wherein the tensioning device has a base body and a rotatably mounted winding shaft is arranged on the base body and the winding shaft has at least one stabilizer which is in operative connection with the winding shaft.

Description

[0001] The invention relates to a tensioning device, for example in the form of a push or pull ratchet, for use on tensioning straps, and to a tensioning strap with such a tensioning device.

[0002] Tensioning devices, such as ratchet tensioners, are widely known. They are used on tensioning straps, which serve to secure objects, such as cargo. Tensioning straps are attached to one or more lashing points for securing the load, or they are wrapped around the object to be secured. The tensioning device then applies pre-tension to the tensioning strap, ensuring that the cargo held by the strap is securely fastened. It is essential to ensure that the cargo remains adequately secured under the dynamic forces that occur during transport.

[0003] Tensioning devices for tensioning a tensioning strap, which can be a strap closed when arranged on the device or two sections of a strap, have a base body, optionally with a base support and with a winding shaft arranged in or on the base body directly at one winding end and rotatably mounted.

[0004] The winding shaft serves to wind up the tensioning strap, wherein a first free end of the tensioning strap or a tensioning strap section can be connected to the winding shaft, the winding shaft can wind up the webbing by an axial rotary movement and the winding shaft has at least one releasable locking device, for example a toothed locking mechanism, for locking the winding shaft.

[0005] For example, a pivot lever is arranged on the winding shaft or on the base body, or the clamping device has a gearbox, for example a worm gear, by means of which a rotary movement of the winding shaft can be effected, whereby the gearbox can also serve as a locking device.

[0006] The winding shaft is usually divided in its longitudinal extent and consists of two half-shafts, which are formed from a sheet metal section in such a way that they have a semicircular cross-section or are formed from a solid material with a semicircular cross-section.

[0007] Under very high loads on the winding shaft, it has been observed that the shaft deforms plastically when the tensioning strap, or more generally the webbing, is wound up, thus impairing the function of the tensioning device. The webbing can be damaged so severely that the tensioning strap is no longer functional.

[0008] The object of the invention is therefore to reduce the disadvantages of the prior art identified above and to reduce the risk of deformation of the winding shaft of the clamping device.

[0009] The task is accomplished by a tensioning device with the features according to main claim 1 and a tensioning strap according to subclaim 13. Further embodiments are set out in the dependent claims.

[0010] A tensioning device for tensioning a webbing strap comprises a base body with a winding shaft rotatably mounted on the base body at one end of the winding. The webbing strap according to the invention is divided into two longitudinally parallel sections, which can be wound side by side onto the winding shaft. For simplicity, the term "webbing strap" will be used hereafter, although a two-part webbing strap can also consist of two separate sections.

[0011] The winding shaft serves to wind up the webbing, and the winding shaft can be connected to a first free end of the webbing or a section of it. The winding shaft can thus wind up the webbing by means of an axial rotary movement. Furthermore, the tensioning device has at least one releasable locking device, which is operatively connected to the winding shaft, for example a toothed locking mechanism or a gear, and which serves to lock the rotational position of the winding shaft.

[0012] The winding shaft is also operatively connected to the gearbox or a pivot lever. This allows the winding shaft to rotate around its axis of rotation. As shown, the gearbox can also serve to lock the winding shaft in its rotational position, for example, if a worm gear is used. In this case, the gearbox simultaneously functions as a releasable locking device.

[0013] The winding shaft can be divided into two half-shafts, which may, for example, have a semicircular cross-section. Alternatively, the winding shaft can be made from a single piece, for example, from a sheet metal section formed into a shaft.

[0014] According to the invention, the winding shaft has at least one stabilizer which is operatively connected to the winding shaft and, in one embodiment of the invention, to the two half-shafts, preferably, but not necessarily, without being operatively connected to the base body.

[0015] Therefore, the at least one stabilizer can also be operatively connected to the base body, whereby the at least one stabilizer can then be positively and / or force-fitted into the base body in one variant. For example, it can be inserted or attached, such as into a recess of the base body. The at least one stabilizer can thus adapt to the position of the winding shaft inserted into the base body. However, it can also be materially bonded to the base body or form a single component.

[0016] According to the invention, a positive-locking and / or force-locking connection exists between the at least one stabilizer and the winding shaft. A material-locking connection is also possible if the at least one stabilizer is not in operative connection with the base body and is, for example, welded to the winding shaft.

[0017] The at least one stabilizer has at least one recess corresponding to a cross-section of the winding shaft, allowing the stabilizer to interact with the winding shaft. This means that the stabilizer is either mounted onto the winding shaft or the winding shaft is passed through the stabilizer. In one embodiment, the stabilizer has, for example, two openings corresponding to a cross-section of the winding shaft, i.e., the two half-shafts. These openings are arranged in the same position relative to each other as the half-shafts, allowing the stabilizer to be mounted onto the winding shaft or the winding shaft to be passed through the stabilizer. The stabilizer is thus preferably positively locked or positively locked (and force-locked) to the winding shaft or the two half-shafts.The at least one stabilizer divides the winding shaft into at least two sections, each of which can hold a webbing or a webbing section, in order to be able to space two webbing sections apart from each other.

[0018] Preferably, the at least one stabilizer is arranged centrally, meaning essentially centrally, on the winding shaft. When multiple stabilizers are used, they can be arranged, for example, centrally and laterally.

[0019] The at least one stabilizer can have a different external shape. It is only necessary to ensure that the external shape does not impede the rotation of the winding shaft around its own axis and that the two webbing sections are continuously separated. In one variant, the external shape of the at least one stabilizer is radially symmetrical, and the at least one stabilizer has a defined radius such that the two webbing sections are continuously separated, as explained, so that they cannot overlap during winding.

[0020] The at least one stabilizer is, for example, a planar structure or a section of an extruded profile and can be disc-shaped. It is preferably made of metal.

[0021] Furthermore, the invention relates to a conventional tensioning strap for securing loads, which incorporates the tensioning device according to the invention. The tensioning strap contains all components known to those skilled in the art, such as a webbing and connecting elements arranged on the webbing, such as hooks, eyelets, or locking elements.

[0022] The at least one stabilizer according to the invention makes it possible to stabilize the winding shaft, so that the tensioning device and a tensioning strap incorporating this tensioning device are suitable for withstanding a higher permissible lashing force (LC). The risk of plastic deformation of the winding shaft during proper use of the tensioning device is reduced by the at least one stabilizer according to the invention.

[0023] The invention is further explained below with reference to an exemplary embodiment and the figures. This will reveal further advantages, features, and embodiments of the invention.

[0024] It shows: Fig. 1 a clamping device according to the invention with a stabilizer, Fig. 2 a tensioning device according to the invention with a stabilizer and a webbing strap, Fig. 3 a stabilizer according to the invention.

[0025] Fig. 1 and Fig. Figure 2 represents a tensioning device 1 for tensioning a webbing 8. The tensioning device 1 has a base body 2 and a winding shaft 3, which is rotatably mounted on the base body 2 directly at one end of the tensioning device 1. The webbing 8, which is only in Fig. The belt, shown in section 2 and which can be wound onto the winding shaft 3, is in the exemplary embodiment divided into two sections and formed into two longitudinally parallel belt sections. Fig. 2 The webbing 8 is partially wound onto the winding shaft 3, with a free end of the webbing 8 being in operative connection with the winding shaft 3. Furthermore, the winding shaft 3 has a releasable locking device 4, in the exemplary embodiment a conventional toothed locking mechanism, which serves to lock the rotational position of the winding shaft 3.

[0026] The winding shaft 3 remains in operative connection with a pivot lever 5. The clamping device 1 is operated via the pivot lever 5, and the pivot lever 5 serves to rotate the winding shaft 3 about its axis of rotation.

[0027] The winding shaft 3 itself is divided longitudinally and consists of two half-shafts 6, 6', which have a semicircular cross-section and are made of solid material. A stabilizer 7 is then arranged centrally on the winding shaft 3, which is in a positive-locking operative connection with the two half-shafts 6, 6' of the winding shaft 3.

[0028] Stabilizer 7 is in Fig. Figure 3 shows the stabilizer 7, which in this embodiment has two openings 9, 9' corresponding to the cross-section of the half-shafts 6, 6'. The openings 9, 9' are arranged in the same position relative to each other as the half-shafts 6, 6', so that the stabilizer 7 can be placed onto the winding shaft 3 and is thereby positively locked onto the two half-shafts 6, 6'. The stabilizer 7 thus divides the winding shaft 3 into two sections, each of which accommodates a section of the webbing 8. Reference symbol list 1 clamping device 2 basic shapes 3 winding shaft 4 Locking device 5 swivel levers 6 half-waves 7 Stabilizer 8 webbing 9 breakthroughs

Claims

[1] Tensioning device (1) for tensioning a webbing (8) with a base body (2) and with a winding shaft (3) arranged on the base body (2) and rotatably mounted, - wherein the winding shaft (3) can be connected to a first free end of the webbing (8) or a section of webbing, - the winding shaft (3) can wind up the webbing (8) by means of an axial rotary movement, - the clamping device (1) has at least one releasable locking device (4) which is operatively connected to the winding shaft (3) and the winding shaft (3) is operatively connected to a gearbox and / or a pivot lever (5) which serves to rotate the winding shaft (3) about an axis of rotation, - characterized by , that the winding shaft (3) has at least one stabilizer (7) which is in an effective connection with the winding shaft (3). [2] Clamping device (1) according to claim 1, wherein the at least one stabilizer (7) is in operative connection with the base body (2). [3] Clamping device (1) according to one of claims 1 or 2, wherein the at least one stabilizer (7) is positively and / or force-locked into the base body (2). [4] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) is in positive and / or force fit or in material fit with the winding shaft (3). [5] Clamping device (1) according to one of the preceding claims, wherein the winding shaft (3) is divided in its longitudinal extent and consists of two half-shafts (6), (6') and the at least one stabilizer (7) is in an operative connection with the two half-shafts (6), (6') of the winding shaft (3). [6] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) has at least one recess corresponding to a cross-section of the winding shaft (3) so that the at least one stabilizer (7) can interact with the winding shaft (3) and the at least one stabilizer (7) is positively locked or positively and force-locked to the winding shaft (3). [7] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) has two openings (9), (9') which correspond to a cross-section of the half-shafts (6), (6') and the openings (9), (9') are arranged in the same position as the half-shafts (6), (6') relative to each other and the at least one stabilizer (7) is placed on the winding shaft (3) or the winding shaft (3) is inserted through the at least one stabilizer (7) and is positively locked or positively and force-locked to the two half-shafts (6), (6'). [8] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) is arranged centrally on the winding shaft (3). [9] Clamping device (1) according to one of the preceding claims, wherein the outer shape of the at least one stabilizer (7) is radially symmetric and has a defined radius. [10] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) is a planar structure or a section of an extruded profile and is designed in a disc-like form. [11] Tensioning device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) has an external shape which ensures a continuous separation of the two webbing sections of the webbing (8). [12] Clamping device (1) according to one of the preceding claims, wherein the at least one stabilizer (7) is made of metal. [13] Tensioning strap for securing loads with a webbing (8) and connecting parts, wherein the tensioning strap has a tensioning device (1) according to any one of claims 1 to 12.

Images