DE102023128846A1 - DEVICE FOR REMOVABLE FASTENING OF TARPAULIN - Google Patents

Abstract

The invention relates, inter alia, to a device (1) for detachably fastening a tarpaulin (24) to a fastening frame, with - a toothed belt (2) with a first (5) and a second (6) end, - a ratchet (3) fastened to the toothed belt (2) for inserting and securing the second end (6) of the toothed belt (2), and - a connection point (9) for connecting the toothed belt (2) to the tarpaulin (24) by means of a fastening means (13) having a head, wherein the connection point (9) comprises at least one recess (12) for at least partially or completely receiving the head, and wherein the device (1) comprises a plastic material, in particular injection-molded, and/or a lever mechanism (16) for securing the toothed belt (2).

Description

The present invention relates to the technical field of fastening tarpaulins to a fastening frame.

It is known from the state of the art that buckle straps, for example, can be used to attach tarpaulins to a fastening frame. When using buckle straps, the tab must first be threaded through the roller buckle, the pin of the buckle strap must be inserted through one of the holes and then the tab must be guided through the bracket behind the pin. With a large number of straps, the use of buckle straps and the process of attaching the buckle straps turns out to be very time-consuming. The buckle straps are often attached to the tarpaulin, for example using rivets. However, the rivets pose the risk of damaging the fastening frame.

The publication EN 10 2019 128 036 A1 describes a buckle strap for fastening a truck tarpaulin to a roof plank fastening of a truck, comprising a buckle and a strap held on the buckle, wherein the buckle has a buckle frame with a mandrel holding web, as well as a mandrel movably held on the mandrel holding web.

The DE 18 10 515 A describes an adjustable clamping device for wires, cables, pipes and the like.

It is the technical object of the present invention to facilitate the attachment of a tarpaulin to a fastening frame and to protect the fastening frame from damage.

This technical problem is solved by an object having the technical features according to the independent claims. Advantageous embodiments are the subject of the dependent claims, the description and the drawings.

• - einem Zahnriemen mit einem ersten und einem zweiten Ende,
• - einer am Zahnriemen festgelegten bzw. befestigten Ratsche zum Einführen und Sichern des zweiten Endes des Zahnriemens, und
• - einer Verbindungsstelle zum Verbinden des Zahnriemens mit der Plane mittels eines einen Kopf aufweisenden Befestigungsmittels, wobei

die Verbindungsstelle zumindest eine Aussparung zur wenigstens teilweisen oder vollständigen Aufnahme des Kopfes umfasst bzw. aufweist, und wobei
die Vorrichtung ein insbesondere spritzgegossenes Kunststoffmaterial und/oder einen Hebelmechanismus, insbesondere mit einem Hebelelement, für das Sichern des Zahnriemens aufweist.The task is proposed to be solved by a
Device for detachably fastening a tarpaulin to a fastening frame, with

• - a toothed belt with a first and a second end,
• - a ratchet fixed or attached to the timing belt for inserting and securing the second end of the timing belt, and
• - a connection point for connecting the toothed belt to the tarpaulin by means of a fastening means having a head, wherein

the connection point comprises or has at least one recess for at least partially or completely receiving the head, and wherein
the device comprises a plastic material, in particular injection-molded, and/or a lever mechanism, in particular with a lever element, for securing the toothed belt.

A reinforcing means, in particular overmolded and/or separate, can be provided in the connection point. It is particularly advantageous that the device has a plastic material, in particular an injection-molded one, or is made from it and/or that the device or the ratchet has a lever mechanism or a lever element for securing the toothed belt. The plastic material is to be understood in particular as a building material or material for the device (or parts/sections of the device). The lever mechanism or the lever element is in particular movable. The lever mechanism can easily cause securing or unlocking or releasing. The device is particularly durable compared to the prior art, has a low weight and is easy to use.

In other words and by way of example, the object is achieved by a device which is designed to fasten a tarpaulin to a frame. The device has: a toothed belt; a ratchet provided for the belt, which is arranged or fastened to the belt; and also a connection area for connecting to the tarpaulin by means of a connecting element such as a rivet or a screw which has a head, for example a rivet head or screw head. The connection area should now be set back or recessed in order to hold the head back and protect it from contact with the tarpaulin and/or the frame. In particular, the device should be injection-molded with or from plastic. Alternatively or additionally, the device or the ratchet has a particularly movable or flexible lever for securing the belt. A reinforcement can be incorporated or introduced in the connection area, which is injected or overmolded for a permanent hold and thus increases the longevity of the device.

• - einer an einem ersten Ende des Zahnriemens festgelegten bzw. befestigten Ratsche mit einem Ratschenmechanismus, insbesondere Hebelmechanismus bevorzugt mit einem Hebelelement, zum Einführen und Sichern eines zweiten Endes des Zahnriemens,
• - einer Verbindungsstelle zum Verbinden des Zahnriemens mit der Plane mittels eines Befestigungsmittels und mit einem durchgehenden Loch zum Durchstecken des Befestigungsmittels durch den Zahnriemen, wobei

die Verbindungsstelle an dem Zahnriemen derart positioniert ist, dass das zweite Ende des Zahnriemens in die Ratsche eingeführt werden kann, wenn der Zahnriemen an der Verbindungsstelle mit der Plane verbunden ist, um die Plane an dem Befestigungsrahmen zu befestigen und die Verbindungsstelle, auf der zur ersten Seite gegenüberliegenden zweiten Seite des Zahnriemens eine Erhöhung mit zumindest einer Aussparung zur Aufnahme zumindest eines Teils des Befestigungsmittels umfasst bzw. aufweist.The technical problem of the invention is also solved by a device for the detachable fastening of a tarpaulin to a fastening frame, with a toothed belt, with a plurality of teeth, which in particular predominantly or consisting of finally arranged on a first side of the toothed belt,

• - a ratchet fixed or attached to a first end of the toothed belt with a ratchet mechanism, in particular a lever mechanism preferably with a lever element, for inserting and securing a second end of the toothed belt,
• - a connection point for connecting the toothed belt to the tarpaulin by means of a fastening means and with a through hole for passing the fastening means through the toothed belt, whereby

the connection point on the toothed belt is positioned such that the second end of the toothed belt can be inserted into the ratchet when the toothed belt is connected to the tarpaulin at the connection point in order to fasten the tarpaulin to the fastening frame and the connection point, on the second side of the toothed belt opposite the first side, comprises or has an elevation with at least one recess for receiving at least part of the fastening means.

The two aforementioned solutions can be combined, whereby features with the same name usually refer to the same feature. However, it is still conceivable that features with the same name can refer to two separate features, so that in case of doubt, numbering or more precise naming of the features could be considered in order to distinguish them better.

The term tarpaulin or protective cloth refers in particular to textile covers or cloths such as PVC-coated fabrics, in particular protective and/or swath cloths. This can also include truck tarpaulins.

The term toothed belt also includes toothed belts or locking belts. Toothed belts are already used, for example, in snowboard bindings, inline skates or even cycling shoes. The invention has recognized that such or similar toothed belts are particularly advantageous for the detachable fastening of a tarpaulin to a fastening frame.

In particular, the invention advantageously provides that the toothed belt is preferably designed including the ratchet. In most cases, the toothed belt and ratchet are fixed or attached to one another, for example by a material bond. The connection point can also be provided in a similar way, for example between the ratchet and the toothed belt and/or one or both of the ratchet and the toothed belt fixed or attached, for example by a material bond. This protects against the loss of parts.

The toothed belt can be easily secured by means of the ratchet and the ratchet mechanism, in particular the lever mechanism.

By means of the recess or by means of the recess in the elevation, for example, the technical advantage is achieved that at least part of the fastening means can be accommodated in the recess, thereby preventing damage to the fastening frame by the fastening means.

The hole of the connecting region or of the reinforcing means runs in particular transversely to the extension of the toothed belt and/or penetrates the device with regard to its two flat sides. The hole is in particular round or circular. The hole can be delimited by a substantially cylindrical inner surface.

The recess can be a depression, for example on one side of the hole of the connection point. The recess can be designed as a radial widening of the hole, in particular on one side of the hole. The recess can have a support surface for the fastening means, in particular the head or rivet head or screw head. The recess is preferably arranged on the side facing away from the teeth of the toothed belt.

The ratchet can secure the toothed belt. This means that the ratchet ratchets on the toothed belt, whereby a positive connection is achieved along the toothed belt in at least one direction, which causes a blocking when the toothed belt is pulled away from the ratchet. The blocking can be at least temporarily removed by operating the ratchet or the ratchet mechanism or the lever mechanism. The ratchet is usually designed in such a way that the second end can be inserted into the ratchet without operating the ratchet, but that the second end cannot be pulled out of the ratchet without operating the ratchet. This provides good security.

The ratchet can be provided with a passage for the second end. The second end can then be inserted into the passage to ensure that the locking mechanism is repeatable and easy to use.

The ratchet can be made of one piece or one piece or several pieces. A multi-piece Ratchet can create a particularly secure form fit and enable easy operation.

The ratchet can be a multi-part ratchet and have a lever element for securing the toothed belt. The lever element can have the plastic material. The lever element can be made of a different material or plastic material from the toothed belt or can have this material. The lever element can have different strength properties than the toothed belt. The lever element is advantageously easy to operate in order to release the fastening.

The lever element can form a limitation of the passage, for example so that the passage is limited all around to prevent loss of the second end. Basically, the passage is arranged transversely to the hole of the connecting region or the reinforcing means. The passage points along the toothed belt.

The lever element can be pivotable relative to the toothed belt, in particular in the ratchet, and/or can be spring-mounted by means of a spring element of the lever mechanism. The spring element is preferably made of or has metal, in particular steel, particularly preferably stainless steel, for example AISI 304, 1.4301 or X5CrNi18-10. The lever element can be automatically pressed onto the toothed belt to secure it. The lever element can be mounted by means of a pin of the lever mechanism to reduce wear. The pin can be made of or made of metal, in particular steel, to make the ratchet particularly durable.

A one-piece ratchet and/or a one-piece lever mechanism is inexpensive to manufacture and safe from loss of parts and damage. In a one-piece ratchet, the lever element can also be designed as one piece with the ratchet. The lever element can be designed to be flexible or bendable in order to cause an elastic movement of the lever element when the second end is pushed in. The lever element can be pulled out by manually operating or bending it.

In particular, a ratchet enables acoustic confirmation of the locking.

The connection point is to be understood in particular as a section of the toothed belt. The connection point is arranged in particular at or in the area of the first end of the toothed belt. The connection point usually has no teeth and no ratchet. The connection point is usually arranged between the ratchet and the toothed belt or the toothed area of the toothed belt. The connection point is advantageously thicker than the toothed belt, for example at least twice as thick. The connection point is advantageously at least 3 mm and/or at most 30 mm thick, more advantageously between at least 4 mm and/or at most 10 mm thick, particularly preferably 5 ± 2 mm thick. This creates optimal reinforcement, since the highest forces on the device occur in the area of the connection point.

The connection point can be designed flush with the toothed belt on the first side or on the side of the teeth. The connection point can be designed hollowed out on the first side or on the side of the teeth in order to save material; in addition, one or more reinforcing webs can be provided to strengthen the connection point. The reinforcing web points regularly along the device.

On the second side or opposite the teeth, the connection point may be raised to form a/the elevation. The connection point or the elevation may be bevelled along the device with a slope, for example on the side of the toothed belt and/or on the side of the ratchet. The connection point or the slope may be spaced from the ratchet, for example at least 5 mm and/or at most 100 mm. The spacing may be achieved by a flat and/or untoothed belt as part of the connection point.

The elevation particularly advantageously has a thickness that is greater than the thickness of the toothed belt with the teeth or in the area of the teeth. The elevation preferably has a thickness of at least 1 mm and/or at most 50 mm, in particular a thickness of at least 2 mm and/or at most 25 mm or a thickness of at least 3 mm and/or at most 10 mm. The elevation can be 6 ± 2 mm, in particular 6 ± 1 mm thick. This can provide sufficient reinforcement and improve the feel.

Preferably, the device is 6 ± 2 mm thick in the region of the elevation. Preferably, the elevation is 5 ± 2 mm thicker than the toothed belt itself. Preferably, the toothed belt, without its teeth, is 1 ± 0.5 mm thick.

In a technically advantageous embodiment of the device, the connection point comprises or has a reinforcing means to increase stability. The reinforcing means ensures that the fastening means is not pulled through the hole in the connection point under load. This increases the strength of the fastening means, meaning that the connection point can withstand higher loads. The reinforcing means is in particular an incorporated or inserted component.

In a further technically advantageous embodiment of the device, the toothed belt is made of a plastic material. Plastic materials offer the advantage of being light and resilient. Furthermore, the use of plastic materials can prevent damage to the fastening frame, for example.

In a technically advantageous embodiment of the device, the timing belt is manufactured by injection molding. In injection molding, the respective material is liquefied (plasticized) using an injection molding machine and injected under pressure into a mold, the injection molding tool. In the tool, the material returns to the solid state through cooling or a cross-linking reaction and is removed as a finished part after the tool is opened. Injection molding allows an almost free choice of shape and surface structure, such as smooth surfaces, graining for touch-friendly areas, patterns, engravings and color effects. This makes it easy to manufacture the timing belt, for example.

The toothed belt and/or the ratchet and/or the connection point can be made from the plastic material and/or by means of injection molding and/or have this. It is also conceivable that silicone is provided as the plastic material. The plastic material is preferably thermoplastic plastic, elastomeric plastic or elastomer, in particular a combination thereof. A thermoplastic elastomer (TPE) can be provided, i.e. a combination of thermoplastic and elastomer. The plastic material can have the thermoplastic and/or elastomeric plastic or even consist of it. The plastic material is also to be understood as a polymer composition or - colloquially - plastic. The plastic material can have or be a polypropylene (PP), a polyethylene (PE), a polycarbonate (PC), a polyamide (PA, PA66 or PA6.6), a polyurethane (PU), a polyoxymethylene (POM), and/or an acrylonitrile-butadiene-styrene copolymer (ABS). Other plastics and/or combinations with the plastics mentioned are also possible.

• eine Shore A-Härte oder Shore D-Härte nach DIN ISO 7619-1 (2012-02) oder DIN ISO 48-4 (z.B. 2021-02) von wenigstens/höchstens 20, 30, 40, 50, 60, 70, 80, 90, 95 oder 100, insbesondere wenigstens 85 und/oder höchstens 95 als Härte nach Shore A oder Shore D;
• einen E-Modul nach DIN 53457 (z.B. 1987-10) von wenigstens/höchstens 400, 600, 800, 1000, 1250, 1500, 2000 oder 4000 N/mm²;
• eine Dichte nach DIN 53479 (z.B. 1976-07) von wenigstens/höchstens 400, 600, 800, 1000, 1250, 1500, 2000 oder 2500 kg/m³; eine Wärmeformbeständigkeitstemperatur HDT-A nach DIN 53461 (z.B. 1987-1) oder DIN EN ISO 75-2 (z.B. 2004-09) von wenigstens/höchstens 50, 60, 70, 80, 90 oder 100 °C;
• eine Bruchdehnung nach DIN 53455 (z.B. 1981-08) von wenigstens/höchstens 10, 20, 30, 50, 100 oder 200; und/oder
• eine Zugfestigkeit nach DIN 53455 (z.B. 1981-08) von wenigstens/höchstens 5, 10, 20, 30, 50, 75 oder 100. Jeweils sind Normen angegeben, die mit dem angegebenen Herausgabedatum relevant sein werden. Es sind aber auch andere Herausgabedaten oder Normen zu dem Materialparameter denkbar. Die Materialparameter grenzen besonders geeignete Kunststoffmaterialien derart ein, dass die Vorrichtung im Einsatz besonders langlebig ist und dabei eine gute Sicherung der Plane ermöglicht. Der Zahnriemen ist so sowohl in hinreichendem Maße flexibel als auch Verschleißbeständig. „Wenigstens/höchstens“ bedeutet „wenigstens und/oder höchstens“, wobei also für die Materialparameter Untergrenzen und alternativ oder ergänzend Obergrenzen angegeben werden.

Various findings have been made regarding the properties of the plastic material. Material parameters can be specified in a particular range with particular advantage. The plastic material can therefore have:

• a Shore A hardness or Shore D hardness according to DIN ISO 7619-1 (2012-02) or DIN ISO 48-4 (e.g. 2021-02) of at least/maximum 20, 30, 40, 50, 60, 70, 80, 90, 95 or 100, in particular at least 85 and/or at most 95 as hardness according to Shore A or Shore D;
• an E-modulus according to DIN 53457 (eg 1987-10) of at least/maximum 400, 600, 800, 1000, 1250, 1500, 2000 or 4000 N/mm ² ;
• a density according to DIN 53479 (eg 1976-07) of at least/maximum 400, 600, 800, 1000, 1250, 1500, 2000 or 2500 kg/m ³ ; a heat deflection temperature HDT-A according to DIN 53461 (eg 1987-1) or DIN EN ISO 75-2 (eg 2004-09) of at least/maximum 50, 60, 70, 80, 90 or 100 °C;
• an elongation at break according to DIN 53455 (eg 1981-08) of at least/maximum 10, 20, 30, 50, 100 or 200; and/or
• a tensile strength according to DIN 53455 (e.g. 1981-08) of at least/at most 5, 10, 20, 30, 50, 75 or 100. In each case, standards are given that will be relevant with the specified publication date. However, other publication dates or standards for the material parameter are also conceivable. The material parameters limit particularly suitable plastic materials in such a way that the device is particularly durable in use and enables the tarpaulin to be secured well. The toothed belt is thus both sufficiently flexible and wear-resistant. "At least/at most" means "at least and/or at most", whereby lower limits and alternatively or additionally upper limits are given for the material parameters.

It is particularly advantageous for preferred embodiments to use a TPE with a hardness between 80 and 100 Shore A, preferably between 85 and 95 Shore A, as a plastic material, in particular for the toothed belt, the connection point and/or the ratchet (at least partially), in order to be as flexible, tear-resistant and durable as possible. The ratchet, in particular the lever element, can comprise or consist of POM and/or PA or polyamide 66 or PA66 in order to be as wear-resistant and break-resistant as possible.

In a further technically advantageous embodiment of the device, the reinforcing agent is injection molded into the connection point This allows the reinforcing agent to be easily integrated into the connection point.

In a technically advantageous embodiment of the device, the reinforcing means is a metal disk with a hole or passage or slot for the fastening means to pass through. Metal disks offer the advantage that they can withstand high loads and can be easily integrated into the connection point. The metal disk serves in particular to transfer the force emanating from the fastening means to a larger area, since the material of the timing belt is less strong than that of the fastening means.

The hole of the reinforcing means or the hole for passing through can be arranged at least substantially coaxially to the hole of the connection point in order to ensure symmetrical reinforcement and thus longevity.

The hole of the reinforcing means or the hole for insertion and/or the hole of the connection point can have a diameter of at least 1 mm and/or at most 20 mm. A diameter of at least 2.5 mm and/or at most 10 mm is advantageously provided. The diameter is particularly advantageously 5 ± 2 mm, in particular 5 ± 1 mm. Alternatively or additionally, the recess can have a diameter of at least 3 mm and/or at most 60 mm. A diameter of at least 7.5 mm and/or at most 30 mm is advantageously provided. The diameter is particularly advantageously 15 ± 6 mm, in particular 15 ± 2 mm.

This means that commercially available screws or rivets of the appropriate size can be used, which have proven to be particularly suitable for the application in terms of the ratio of weight to strength.

The reinforcing agent can comprise or consist of a metal alloy, in particular a steel alloy. The metal alloy is in particular steel, particularly preferably stainless steel, for example AISI 304, 1.4301 or X5CrNi18-10. In the context of this application, other stainless metals, in particular steels, are also conceivable for metals. The reinforcing agent particularly advantageously has a thickness of at least 0.1 mm and/or at most 10 mm, in particular a thickness of at least 0.25 mm and/or at most 5 mm or a thickness of at least 0.8 mm and/or at most 1.6 mm. The reinforcing agent can be 1.10 ± 0.25 mm, in particular 1.10 ± 0.1 mm thick. The reinforcing agent can be galvanized for improved corrosion protection. This thickness is optimal for sufficient strength with low weight.

It is advantageously provided that the toothed belt can have a certain length. The length can refer to the toothed belt itself, i.e. only in the toothed area or in the active tooth area, to the toothed belt and the connecting area, or to the toothed belt with connecting area and with ratchet. The length can therefore refer to the entire device if it is arranged elongated, for example. The length of the toothed belt is, for example, at least 5 cm and/or at most 100 cm, preferably at least 7.5 cm and/or at most 50 cm, more preferably at least 10 cm and/or at most 30 cm. Experience has shown that a length between 15 cm and 50 cm covers a wide range of tarpaulin applications. In preferred embodiments, the length can be, for example, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm or 500 mm, each ± 25 mm (or ± 15 mm or ± 10 mm or less) to serve many applications. A length of the toothed belt with teeth of 120 ± 10 mm has proven to be particularly advantageous. This ensures the most secure fastening possible and does not use too much material, making the device effective and cost-effective.

It is advantageous if the toothed belt teeth are provided in a specific number. A number of teeth of at least 5 and/or at most, preferably at least 20 and/or at most 160, are advantageously provided here. A certain number of teeth may be advantageous in order to distribute wear over several teeth.

A width of the device, in particular of the toothed belt, the connection point and/or the ratchet, can also be specially provided. Different or identical widths can be provided. The ratchet is usually wider than the toothed belt and/or the connection point. The width is preferably at least 1 cm and/or at most 10 cm, preferably at least 1.5 cm and/or at most 5 cm. In particular, the width is between 1 and 3 cm, for example the width is 18 ± 5 mm or 20 mm ± 5 mm. A width of the device or toothed belt of 18.5 ± 2 mm has proven to be particularly advantageous.

It is advantageous if the width of the teeth on the timing belt is narrower than the width of the belt. For example, the teeth can be at least 1%, preferably at least 5% or at least 10% narrower than the width of the timing belt. For example, the teeth are 16 mm wide, while the belt is 18 mm wide (this corresponds to more than 10% narrower teeth). This means that the teeth are more protected and less likely to suffer edge wear. It is also the case that this minimizes damage from the device to other objects.

The device is regularly elongated and can therefore have parallel edges. In particular, the toothed belt has parallel edges to simplify securing and to ensure a constant and secure hold in the ratchet. The toothed belt can have edges that are flush with the connection point and opposite one another.

The device can have the mentioned fastening means provided therewith. The fastening means can be a rivet or a screw. The head can be a rivet head or a screw head. The rivet is preferably made of or has metal, in particular steel, particularly preferably stainless steel, for example AISI 304, 1.4301 or X5CrNi18-10.

In another technically advantageous embodiment of the device, the fastening means is a rivet or a screw and the recess is preferably provided in the raised connection point to accommodate the rivet head or screw head. Rivets or screws offer the advantage that they can create a secure connection between the toothed belt and the tarpaulin. Rivets offer the advantage that they can be used for a variety of material combinations. They have hardly any distortion and have a high basic static strength. Screws have the advantage that they can be removed more easily and without causing any damage.
S

In a technically advantageous embodiment of the device, the depth of the recess is sufficient to accommodate the rivet head or screw head completely in the recess. This further prevents damage to the fastening frame by the fastening means.

The depth of the recess is in particular at least 1 mm and/or at most 10 mm, advantageously at least 2 mm and/or at most 5 mm, in particular 3.5 mm ± 1.5 mm. Typically, the depth of the recess is less than the thickness of the elevation.

The invention also relates to the use of the device described above for the detachable fastening of at least one tarpaulin and/or protective cloth to agricultural machines or to an agricultural machine, in particular one for harvesting green fodder. The agricultural machine or machines preferably comprise or have at least one mower.

Many protective covers, especially protective hoods that completely cover a mower, for example, are attached to the mower frame with buckle straps in addition to screw connections. The present invention makes it easier to attach and fasten the tarpaulins, for example protective covers on agricultural machinery, to a mounting frame.

The device is particularly suitable for use in an agricultural machine which has a mower with a fastening frame, a tarpaulin and/or a protective cloth, and at least one device for detachably fastening the tarpaulin and/or the protective cloth to the fastening frame, wherein the device is or will be connected to the tarpaulin or the protective cloth. It is advantageously the device described here. A plurality of devices can also be provided or used in the agricultural machine, for example two or more devices for a single tarpaulin, for example four, six, eight, ten, twelve or more devices. The plurality of devices can be distributed on the tarpaulin or the protective cloth and/or can be or will be connected to the tarpaulin.

The mower can be designed as a front mower or a rear mower when used as described above. The mower can be attached to a tractor and operated by it. The mower can also be designed for attachment using hydraulic suspension or as a towed mower. The device can be used on a particularly large number of mowers in order to attach the tarpaulin or protective cloth particularly easily and safely. According to the invention, a lot of time is saved in use if the attachment has to be loosened or restored.

1. 1. Vorrichtung zur lösbaren Befestigung einer Plane an einem Befestigungsrahmen, mit
   • - einem Zahnriemen, mit einer Mehrzahl von Zähnen, die auf einer ersten Seite des Zahnriemens angeordneten sind,
   • - einer an einem ersten Ende des Zahnriemens befestigten Ratsche mit einem Ratschenmechanismus zum Einführen und Sichern eines zweiten Endes des Zahnriemens,
   • - einer Verbindungsstelle, zum Verbinden des Zahnriemens mit der Plane mittels eines Befestigungsmittels, mit einem durchgehenden Loch zum Durchstecken des Befestigungsmittels durch den Zahnriemen,
   die Verbindungsstelle an dem Zahnriemen derart positioniert ist, dass das zweite Ende des Zahnriemens in die Ratsche eingeführt werden kann, wenn der Zahnriemen an der Verbindungsstelle mit der Plane verbunden ist, um die Plane an dem Befestigungsrahmen zu befestigen und die Verbindungsstelle auf der zur ersten Seite gegenüberliegenden zweiten Seite des Zahnriemens eine Erhöhung mit zumindest eine Aussparung zur Aufnahme zumindest eines Teils des Befestigungsmittels umfasst bzw. aufweist.
2. 2. Vorrichtung nach Aspekt 1, dadurch gekennzeichnet, dass die Verbindungsstelle zur Erhöhung der Stabilität ein Verstärkungsmittel umfasst bzw. aufweist.
3. 3. Vorrichtung nach einem der Aspekte 1 oder 2, dadurch gekennzeichnet, dass der Zahnriemen aus einem Kunststoffmaterial hergestellt ist.
4. 4. Vorrichtung nach Aspekt 3, dadurch gekennzeichnet, dass der Zahnriemen (2) mittels Spritzgießen hergestellt ist.
5. 5. Vorrichtung nach Aspekt 4, dadurch gekennzeichnet, dass das Verstärkungsmittel mittels Spritzgießen in der Verbindungsstelle umspritzt ist.
6. 6. Vorrichtung nach einem der Aspekte 2 bis 5, dadurch gekennzeichnet, dass das Verstärkungsmittel eine Metallscheibe mit einem Loch zum Durchstecken des Befestigungsmittels ist.
7. 7. Vorrichtung nach einem der vorherigen Aspekte, dadurch gekennzeichnet, dass das Befestigungsmittel eine Niete oder eine Schraube ist und die Aussparung in der Erhöhung der Verbindungsstelle zur Aufnahme des Nietkopfs oder Schraubenkopfs vorgesehen ist.
8. 8. Vorrichtung nach Aspekt 7, dadurch gekennzeichnet, dass die Tiefe der Aussparung ausreichend ist, den Nietkopf oder Schraubenkopf vollständig in der Aussparung aufzunehmen.
9. 9. Verwendung der Vorrichtung nach einem der vorherigen Aspekte zur lösbaren Befestigung zumindest einer Plane und/oder eines Schutztuchs bei Landmaschinen.

The following aspects 1 to 9 are part of the present disclosure. The aspects can constitute their own subject matter of protection, provided they are claimed. The aspects relate to one another. Based on the aspects, the teaching of the rest of the disclosure can be used, although the reverse is also possible.

1. 1. Device for the detachable fastening of a tarpaulin to a fastening frame, with
   • - a toothed belt having a plurality of teeth arranged on a first side of the toothed belt,
   • - a ratchet attached to a first end of the toothed belt with a ratchet mechanism for inserting and securing a second end of the toothed belt,
   • - a connection point for connecting the toothed belt to the tarpaulin by means of a fastening device, with a through hole for passing the fastening device through the toothed belt,
   the connection point on the toothed belt is positioned such that the second end of the toothed belt can be inserted into the ratchet when the toothed belt is connected to the tarpaulin at the connection point in order to fasten the tarpaulin to the fastening frame and the connection point on the second side of the toothed belt opposite the first side comprises or has an elevation with at least one recess for receiving at least part of the fastening means.
2. 2. Device according to aspect 1, characterized in that the connection point comprises or has a reinforcing agent to increase the stability.
3. 3. Device according to one of aspects 1 or 2, characterized in that the toothed belt is made of a plastic material.
4. 4. Device according to aspect 3, characterized in that the toothed belt (2) is produced by injection molding.
5. 5. Device according to aspect 4, characterized in that the reinforcing means is encapsulated in the connection point by means of injection molding.
6. 6. Device according to one of aspects 2 to 5, characterized in that the reinforcing means is a metal disc with a hole for the insertion of the fastening means.
7. 7. Device according to one of the preceding aspects, characterized in that the fastening means is a rivet or a screw and the recess in the elevation of the connection point is provided for receiving the rivet head or screw head.
8. 8. Device according to aspect 7, characterized in that the depth of the recess is sufficient to accommodate the rivet head or screw head completely in the recess.
9. 9. Use of the device according to one of the preceding aspects for the releasable fastening of at least one tarpaulin and/or a protective cloth in agricultural machinery.

• 1 eine perspektivische Ansicht der Vorrichtung zur lösbaren Befestigung einer Plane gemäß einem Ausführungsbeispiel der Erfindung;
• 2 eine weitere perspektivische Ansicht der Vorrichtung zur lösbaren Befestigung einer Plane gemäß einem Ausführungsbeispiel der Erfindung; und
• 3 eine Verwendung der Vorrichtung.

Embodiments of the invention are shown in the drawings and are described in more detail below. They show:

• 1 a perspective view of the device for releasably fastening a tarpaulin according to an embodiment of the invention;
• 2 a further perspective view of the device for releasably fastening a tarpaulin according to an embodiment of the invention; and
• 3 a use of the device.

1 shows a perspective view of a device 1 for releasably fastening a tarpaulin to a fastening frame according to an embodiment of the invention.

The device 1 comprises a toothed belt 2 which comprises a plurality of teeth 4 on a first side 7. The teeth 4 are arranged parallel to one another and begin at one end 6 of the toothed belt 2 and extend along the longitudinal axis of the toothed belt 2. This end 6 is also referred to as the free end. The teeth 4 extend over the entire width of the toothed belt 2.

In 1 it can be seen that the teeth 4 are arranged over more than half the length of the toothed belt 2. The toothed belt 2 can be made, for example, from a plastic material, in particular the toothed belt 2 can be manufactured by means of injection molding technology.

To fix the free end 6 of the toothed belt 2, for example after the toothed belt 2 has been wrapped around the fastening frame, the toothed belt 2 comprises a ratchet 3 at the other end 5. The ratchet 3 comprises a ratchet mechanism for inserting and securing the free end 6 of the toothed belt 2.

Here, as for example in 1 shown, a lever mechanism 16 may be provided to secure the free end 6 after insertion of the end 6 into the ratchet 3. The teeth 4 arranged along the longitudinal axis of the toothed belt 2 are engaged within the ratchet 3, for example by means of a second set of teeth, and secured by means of the lever mechanism 16.

The ratchet 3 has a passage 18 for the second end 6 and a lever element of the lever mechanism 16 for securing the toothed belt 2. The lever element forms a boundary of the passage 18 and is pivotably mounted in the ratchet 3 relative to the toothed belt 2. In particular, the lever element is spring-mounted by means of a spring element accommodated in the ratchet 3. The lever element is rotatably mounted about an axis by means of a pin. The lever element is formed separately from the toothed belt 2 from a plastic material that is different from the toothed belt 2, the ratchet 3 being a multi-part ratchet 3.

The ratchet 3 is rounded or concave on the back, in particular facing away from the lever element or lever mechanism 16, in particular on the second side 8 in relation to the device 1, for example in order to avoid sharp edges. The rounding 25 is in the present case in the range between R10 and R100, in particular between R15 and R30, more precisely the rounding 25 is R25 in the present case. R25 stands for a radius of 25 millimeters, for example; this applies analogously to the other values of the roundings 25.

Advantageously, the lever element protrudes from the ratchet 3 along the device in order to be able to reach the passage 18 better.

In order to be able to attach tarpaulins to the fastening frame, the toothed belt 2 can be connected to the tarpaulin (cf. 1 and 2 ) or connected (cf. 3 ). In this case, it can be provided that the toothed belt 2 is detachably connected to the tarpaulin in order to be able to replace the toothed belt 2 in the event of a defect.

For fastening the toothed belt 2 to the tarpaulin, the toothed belt 2 comprises a connection point 9. The toothed belt 2 is fastened to the tarpaulin by means of a fastening means 13 at the connection point 9. The connection point 9 is positioned on the toothed belt 2 such that the second end 6 of the toothed belt 2 can be inserted into the ratchet 3 when the toothed belt 2 is connected to the tarpaulin at the connection point 9 in order to fasten the tarpaulin to the fastening frame.

In one embodiment of the invention, rivets or screws can be provided as fastening means 13. For this purpose, the toothed belt 2 provides a through hole 10 at the connection point 9 for the fastening means 13 to be inserted through.

On the first side, the connection point 9 is flush with the toothed part of the toothed belt 2 or merges flatly. On the second side 8, the connection point 9 is raised to form the elevation 11. The connection point 9 or the elevation 11 is beveled on both sides along the device 1 with a bevel 19, in particular on the side of the toothed belt 2 and on the side of the ratchet 3. The connection point 9 or one of the bevels 19 is spaced from the ratchet 3, in this case by approximately 25 ± 10 mm. The spacing is realized by a flat or untoothed belt as part of the connection point 9 and between the ratchet 3 and the toothed part of the toothed belt 2. This creates a homogeneous flow of force and flexibility.

Since the toothed belts 2 are connected to the tarpaulin, for example firmly riveted to the tarpaulin, but the fastening means 13 must not rub against the fastening frame, the connection point 9 provides a raised portion 11. The raised portion 11 is arranged on the side 8 of the toothed belt opposite the side 7 with the teeth 4. The raised portion 11 comprises at least one recess 12 for receiving at least part of the fastening means 13.

The elevation 11 has a thickness D that is greater than the thickness of the toothed belt 2. The thickness D of the elevation 11 is 6 mm in this case.

The thickness of the toothed belt 2 is 2 ± 1 mm (without teeth).

The thickness of the timing belt 2 is 3 ± 1 mm (viewed with teeth).

The recess 12 has a depth less than the thickness D of the elevation 11. The recess 12 is presently approximately 3 to 4 mm deep, preferably 3.5 ± 1 mm. The recess is a substantially cylindrical depression at the hole 10 of the connection point 10.

Due to the fastening of the toothed belt 2 to the tarpaulin, large forces can occur, for example due to the wind load on the tarpaulin. Therefore, in one embodiment of the invention, it can be provided that the connection point 9 comprises a reinforcing means 15 to increase stability. The reinforcing means 15 serves in particular to ensure that the fastening means 13 cannot pull through the through hole under load. In one embodiment of the invention, it can be provided, for example, that the reinforcing means 15 is already molded onto the connection point 9 during production using injection molding technology. The reinforcing means 15 can, for example, be a metal disk with a Hole for inserting the fastening means 13, which is overmolded at the connection point 9 during manufacture and is thereby secured in the connection point 9.

The reinforcing means 15 has a thickness of 1.15 mm in the present case. It is a metal disk made of a steel alloy. The metal disk can be galvanized.

In 2 is a further perspective view of the device 1 for releasably fastening a tarpaulin according to an embodiment of the invention. The 2 shown toothed belt 2 corresponds to the one in 1 shown toothed belt 2, whereby the surface 8 of the toothed belt 2 with the elevation 11 is shown more clearly. In 2 In particular, the recess 12 in the elevation 11 and the hole 10 through the toothed belt 2 can be seen, through which the fastening means 13 can be pushed. In 2 As an example of the fastening means 13, a rivet with a rivet head is indicated. In 2 it can be seen that the depth of the recess 12 in the elevation 11 is sufficient to accommodate the rivet head completely in the recess 12. This can prevent damage to the fastening frame by the fastening means.

The hole 10 of the connection point 9 and the hole of the reinforcing means 15 are arranged essentially coaxially to one another and have at least essentially the same diameter and are each at least essentially round, more precisely circular. The diameter is 5 mm in each case.

The toothed belt 2 has a length L of 180 mm in this case. The toothed belt 2 has a width B of 18 mm in this case. The device 1 or the toothed belt and the connection point 9 have parallel edges. The ratchet 3 is wider than the toothed belt 2 or the connection point 9. The width of the ratchet 3 is 25 ± 5 mm.

The teeth 4 on the toothed belt 2 are slightly narrower than the width B, in particular at least 1% narrower, with particular advantage at least 10% narrower.

The length L of 180 mm in this case includes the teeth 4. This is also referred to as the active tooth area. It is conceivable that a length L of 120 mm is also sufficient to securely fasten tarpaulins and/or protective cloths, and to have as little of the second end 6 swinging freely as possible.

3 shows an inventive use of the 1 and 2 shown device 1 for releasably fastening at least one tarpaulin and/or a protective cloth 24 to an agricultural machine 20, wherein the agricultural machine 20 comprises a mower 22 for harvesting green fodder.

The mower 22 has a fastening frame. The mower 22 is designed as a rear mower and for fastening by means of hydraulic suspension. The mower has several tarpaulins and/or protective cloths 24. A large number of devices 1 fasten the tarpaulins and/or protective cloths 24 detachably to the fastening frame. The devices 1 are riveted to the tarpaulin and/or the protective cloth 24 by means of fastening means 13 and are thus connected thereto.

All features explained in connection with individual embodiments of the invention can be provided in different combinations in the object according to the invention in order to simultaneously realize their advantageous effect.

The scope of the present invention is given by the patent claims and is not limited by the features explained in the description or shown in the figures.

List of reference symbols

1

contraption

2

Timing belt

3

ratchet

4

Tooth

5

first end

6

second end

7

first page

8th

second page

9

Connection point

10

Hole

11

increase

12

Recess

13

Fasteners

14

Rivet head

15

Reinforcing agents

16

Lever mechanism

17

Reinforcing bar

18

Passage

19

Bevel

20

Agricultural machinery

22

Mower

24

Tarpaulin and/or protective cloth

25

Rounding

B

Width

D

thickness

L

length

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 102019128036 A1 [0003]
• DE 1810515 A [0004]

Claims (10)

Device (1) for detachably fastening a tarpaulin (24) to a fastening frame, with - a toothed belt (2) with a first (5) and a second (6) end, - a ratchet (3) fastened to the toothed belt (2) for inserting and securing the second end (6) of the toothed belt (2), and - a connection point (9) for connecting the toothed belt (2) to the tarpaulin (24) by means of a fastening means (13) having a head, wherein the connection point (9) comprises at least one recess (12) for at least partially or completely receiving the head, and the device (1) has a plastic material, in particular injection-molded, and/or a lever mechanism (16) for securing the toothed belt (2). Device (1) for detachably fastening a tarpaulin (24) to a fastening frame, with - a toothed belt (2) with a plurality of teeth (4) arranged on a first side (7) of the toothed belt (2), - a ratchet (3) fastened to a first end (5) of the toothed belt (2) with a ratchet mechanism for inserting and securing a second end (6) of the toothed belt (2), - a connection point (9) for connecting the toothed belt (2) to the tarpaulin (24) by means of a fastening means (13), with a through hole (10) for inserting the fastening means (13) through the toothed belt (2), wherein the connection point (9) on the toothed belt (2) is positioned such that the second end (6) of the toothed belt (2) can be inserted into the ratchet (3) when the toothed belt (2) is connected to the tarpaulin (24) at the connection point (9) in order to secure the tarpaulin (24). to be fastened to the fastening frame, the connection point (9) on the second side (8) of the toothed belt (2) opposite the first side (7) comprises an elevation (11) with at least one recess (12) for receiving at least part of the fastening means (13), and the toothed belt (2) is made of a plastic material and by means of injection molding. Device (1) according to Claim 1 or 2 , characterized in that the connection point (9) comprises a/the reinforcing means (15), in particular formed in one piece, preferably wherein the reinforcing means (15) is provided to increase the stability and is encapsulated in the connection point (9) by means of injection molding, and/or comprises or consists of a metal alloy, in particular a steel alloy, and/or is a metal disk, and/or has a thickness of at least 0.1 mm and/or at most 10 mm, in particular has a thickness of at least 0.25 mm and/or at most 5 mm or has a thickness of at least 0.8 mm and/or at most 1.6 mm. Device (1) according to one of the preceding claims, characterized in that the reinforcing means (15) has a hole for passing through a/the fastening means (13), in particular wherein the hole is arranged substantially coaxially to a/the hole (10) of the connection point (9), and/or that a/the hole of the reinforcing means (15) and/or the hole (10) of the connection point (9) has a diameter of at least 1 mm and/or at most 20 mm, in particular has a diameter of at least 2.5 mm and/or at most 10 mm. Device (1) according to one of the preceding claims, characterized in that the toothed belt (2) and/or the ratchet (3) and/or the connection point (9) is/are made of the plastic material and/or by means of injection molding and/or comprises this, preferably wherein the plastic material comprises or consists of thermoplastic and/or elastomeric plastic, in particular thermoplastic elastomer (TPE), preferably wherein the plastic material comprises or is a polyamide (PA or PA66 or PA6.6), a polypropylene (PP), a polyethylene (PE), a polycarbonate (PC), a polyurethane (PU), a polyoxymethylene (POM) or an acrylonitrile-butadiene-styrene copolymer (ABS). Device (1) according to one of the preceding claims, characterized in that the plastic material has: a Shore A hardness or Shore D hardness of at least and/or at most 20, 30, 40, 50, 60, 70, 80, 90 or 100, particularly preferably the Shore A hardness is at least 85 and/or at most 95; an E-modulus of at least/at most 400, 600, 800, 1000, 1250, 1500, 2000 or 4000 N/mm ² ; a density of at least/at most 400, 600, 800, 1000, 1250, 1500, 2000 or 2500 kg/m ³ ; a heat deflection temperature HDT-A of at least/at most 50, 60, 70, 80, 90 or 100 °C; an elongation at break of at least/at most 10, 20, 30, 50, 100 or 200; and/or a tensile strength of at least/at most 5, 10, 20, 30, 50, 75 or 100. Device (1) according to one of the preceding claims, comprising the fastening means (13), in particular rivet or screw, preferably wherein the recess (12) is in an elevation (11) of the connection point (9) is provided for receiving a rivet head or screw head (14) of the fastening means (13), preferably wherein the depth of the recess (12) is sufficient to receive the rivet head or screw head (14) completely in the recess (12). Device (1) according to one of the preceding claims, characterized by a length of the toothed belt (2) of at least 5 cm and/or at most 100 cm, preferably at least 7.5 cm and/or at most 50 cm, more preferably at least 10 cm and/or at most 30 cm; and/or by teeth (4) of the toothed belt (2), wherein a number of teeth (4) of at least 5 and/or at most 100, preferably at least 20 and/or at most 80, is provided; and/or by a width of the toothed belt (2) of at least 1 cm and/or at most 10 cm, preferably at least 1.5 cm and/or at most 5 cm. Device (1) according to one of the preceding claims, characterized in that the ratchet (3) has a passage for the second end (6) and/or a/the lever element, in particular the lever mechanism (16), for securing the toothed belt (2), preferably wherein the lever element forms a limitation of the passage, and preferably wherein the lever element is pivotally mounted relative to the toothed belt (2), in particular in the ratchet (3), and/or is resiliently mounted by means of a spring element, for example by means of a pin or pin, preferably wherein the lever element is formed in one piece with the ratchet (3) and/or that the lever element is flexible. Use of the device (1) according to one of the preceding claims for the detachable fastening of at least one tarpaulin and/or a protective cloth (24) in an agricultural machine or in agricultural machines for harvesting green fodder, in particular wherein the agricultural machine or machines have/have: a mower with a fastening frame, preferably a front or rear mower and/or designed for fastening by means of hydraulic suspension or as a towed mower, and the tarpaulin and/or the protective cloth (24), wherein the device (1) is to be connected to the tarpaulin and/or the protective cloth (24), preferably wherein a plurality of the devices (1) are to be connected to the tarpaulin and/or the protective cloth (24).

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