feed device

Description

State of the art

[0001] Devices or systems are known for feeding small components, such as joining elements like functional or connecting elements like rivets, from a provided quantity of components to a recipient. The components are fed, for example, to a processing device or tool, whereby a compressed gas, such as compressed air, is used as a transport medium or energy carrier for picking up individual components from a supply and for automated component feeding. Compressed air is used in pneumatic systems, for example, with a cylinder-piston assembly, which utilizes the compressed air as an energy carrier. In industrial applications, the compressed air is provided centrally and supplied to the various recipients. Compressors are used for this purpose.

[0002] A disadvantage of many compressed air applications is that compressed air is an inefficient energy carrier, with losses exceeding 90 percent. These losses result from... from B. compression losses, leakage losses or network losses or flow losses such as pipeline network pressure losses. Aufgabe und Vorteile der Erfindung

[0003] The object of the present invention is to provide a feeding device that avoids the disadvantages discussed or minimizes them. This object is achieved by the independent claims.

[0004] Advantageous embodiments of the invention are defined in the dependent claims.

[0005] The invention relates to a feeding device for elements, wherein the elements are movable to a connection point of the feeding device, wherein the feeding device is designed as a separately positionable peripheral unit for supplying a processing device with elements, wherein the elements can be ejected from the feeding device via the connection point, and wherein the connection point is designed for a

[0006] The connection is formed with a hollow transport line that can be connected to the feeding device, so that in the connected state of the transport line the elements in the hollow transport line can be transported from the connection point to the processing device spaced apart from the feeding device, wherein the elements can be transported by means of a gas flow.

[0007] The feeding device includes a gas flow generation unit which provides the gas flow in such a way that, due to the gas flow, the elements can be transported from the connection point due to the gas flow provided by the gas flow generation unit, wherein the feeding device is located in an installation room, and wherein the gas flow generation unit is designed to draw in air from the environment of the feeding device in the installation room of the feeding device in order to provide the gas flow.

[0008] For example, the connection point is designed for a particularly gas-tight connection between a pipe section of the feed device and a hollow transport pipe that can be connected to the feed device. For example, the pipe section and the transport pipe are integrally connected at the connection point, for example by a single hollow hose.

[0009] For example, the feeding device has a reservoir for receiving a plurality of elements.

[0010] For example, the gas flow provided by the gas power generation unit enables the elements to be transported from an element transfer point through the pipeline section to the connection point. Similarly, the gas flow provided by the gas power generation unit enables the elements to be transported out of the pipeline section, for example, into the transmission pipeline and further within the transmission pipeline.

[0011] The invention relates to a feeding device with a storage container for receiving a plurality of elements, wherein the feeding device has a hollow line section through which the elements can be moved from an element transfer point, where the elements can be inserted into the line section, to a connection point of the feeding device, wherein the feeding device is designed as a separately positionable peripheral unit for supplying a processing device with elements, wherein the elements movable in the line section can be discharged from the feeding device via the connection point, and wherein the connection point is designed for a connection, in particular a gas-tight connection, between the line section and a hollow transport line that can be connected to the feeding device.so that, in the connected state of the pipe section and the transport pipe, the elements in the hollow transport pipe can be transported from the connection point to the processing device spaced apart from the feeding device, wherein the elements are transported by means of a gas flow in the pipe section to the connection point. Due to the gas flow prevailing in the pipe section, the elements are moved, whereby, with the transport pipe connected to the pipe section,The elements can be moved from the connection point into the transport line and reach the processing equipment within the transport line. Accordingly, for example, the gas flow from the pipe section continues into the transport line when the transport line is connected. The gas flow provides the driving force for transporting the elements in the pipe section and in the transport line in one direction. In particular, the further transport within the transport line occurs due to the gas flow provided by the feed device. The gas flow in the pipe section continues from, or out of, the pipe section into the transport line and along the entire length of the transport line, especially to the processing equipment.

[0012] The elements are carried along by the gas flow in the feeding device at the element transfer point and moved further along the pipeline section in a conveying direction. Using the kinetic energy of each element at the connection point, the elements move continuously within and along the transport pipeline until they reach the processing equipment.

[0013] The feeding device, for example, has a housing that surrounds an interior space of the feeding device. The interior space preferably has a side or area that is openly connected to the ambient atmosphere or air in a room where the feeding device is located. The housing has from B. a floor, a back wall and vertical side walls.

[0014] Inside the feeding device, the storage container is arranged to hold a large number of elements, for example, up to several hundred individual elements. The elements placed in the storage container are from B. randomly oriented from B. The material is present as bulk material in the storage container. The storage container, or rather a receiving volume of the storage container for the elements, is connected, for example, to a sorting pot via a hollow, pipe-like intermediate piece. This intermediate piece serves, for example, as a passage for each element coming from the receiving volume and leading it into the sorting pot. In the sorting pot, the elements are individually positioned correctly and transferred to a buffer line connected to the sorting pot. In the buffer line, the following occurs: from B.The system automatically feeds the elements into a row, each oriented in the same direction. From the buffer line, the elements proceed to a singulation unit. From the singulation unit, the leading element in each row is transferred to the element transfer point. From the element transfer point, the respective element enters the pipe section. This transfer is facilitated, for example, by the gas flow. The transfer or movement of the elements is, for example, gravity-assisted. The gas flow is directed in such a way that the respective element is carried into the pipe section and transported along it towards or to the connection point and beyond. The hollow pipe section is from B. a flexible hollow hose or, for example, a hollow rigid pipe.

[0015] For example, the feeding device is designed so that different types of elements can be processed or provided with it and transported by the gas flow. These elements include, for example, fasteners or joining elements such as screws and rivets, self-piercing rivets, and / or functional elements such as self-piercing, press-fit, and clinch rivet elements, press-fit bolts, and / or press-fit nuts.

[0016] The section of the line extends from B. from the element transfer point to, for example, the connection point. Often, the pipe section and the transport pipe are a single piece. from B. a hollow tube.

[0017] The connection point is otherwise formed, for example, by an open end of the pipe section. The connection point includes, for example, an opening in the supply device through which compressed air flows during operation. However, it is advantageous, for example, for the pipe section and the transport line to be formed as a single piece, such as a supply hose. In this case, the connection point is not visually identifiable as such. The connection point is then formed at a point within a pipe cross-section. This cross-section is then an imaginary junction between one end of the pipe section and a continuously adjoining end of the transport line. The connection point could, for example, be formed by cutting the single-piece supply hose at the relevant point in the cross-section of the supply hose.

[0018] It is explained below that a feeding system according to the invention comprises the feeding device and the transport line together.

[0019] It is possible that the element transfer point and the connection point are directly adjacent.

[0020] The core of the invention lies in the fact that the feeding device includes a gas flow generation unit which provides the gas flow in the pipe section such that, due to the gas flow, the elements can be moved from the element transfer point through the pipe section to the connection point, wherein the elements can be transported from the connection point out of the pipe section due to the gas flow provided by the gas flow generation unit, wherein the feeding device is located in an installation space, and wherein the gas flow generation unit is configured to draw in air from the surroundings of the feeding device in the installation space of the feeding device in order to provide the gas flow. The air is drawn in from the surroundings of the feeding device, in particular from the, for example, .The intake air is drawn from the immediate vicinity or near the feed device. It is primarily air from the air volume surrounding the feed device. When the gas flow generation unit is operating, the intake air is compressed and / or accelerated by the unit. The gas flow generation unit is also referred to as a gas compressor unit. The compressed air produced by this unit then flows to the element transfer point and, if connected, into the transport line.

[0021] The elements, in the connected state of the pipe section and the transport line, for example with one end connected to the pipe section, can be transported out of the pipe section and further in the transport line with the gas flow or compressed air provided by the gas flow generation device, in particular to the processing device, with the other end of the transport line being connected to the processing device.

[0022] The proposed feeding device provides an advantageous decentralized compressed air supply for element conveying. In particular, it avoids the disadvantages that would otherwise arise when using a central compressed air system to provide gas flow in the pipeline section.

[0023] The decentralized gas flow generation unit of the supply device reduces a number of losses compared to a central compressed air supply.

[0024] A gas flow generating device is understood to be, in particular, a device that generates a gas flow from gas, for example, air, such as ambient air at a typical atmospheric pressure of around one bar. The gas or air is drawn directly into the gas flow generating device from the immediate vicinity of the feed device. Specifically, no compressed air supplied by a decentralized compressed air source not belonging to the feed device is used. The air is drawn into the gas flow generating device at ambient pressure, and the gas flow is generated at a pressure level higher than ambient pressure. A gas flow generating device is defined as... from B. no facility to understand how from B. A throttling device for reducing the pressure of previously generated compressed air at a higher pressure than atmospheric pressure, which reduces the pressure of a compressed gas or compressed air at a higher pressure to a lower pressure level. The gas flow generation device serves primarily to increase the pressure of from B. Air from the naturally occurring atmospheric ambient air in the installation room of the supply device, for example, to compress and / or accelerate the air with the gas flow generation device.

[0025] The gas flow generation unit, for example, belongs exclusively to exactly one feed device. For example, the gas flow generation unit from B.Exactly one gas flow generation device is designed for generating the gas flow for an associated supply device. Preferably, exactly one gas flow generation device supplies exactly one supply device with compressed air or with the gas flow.

[0026] In principle, the gas power generation plant can be exactly one machine such as from B. The gas flow generation unit may comprise exactly one compressor. Alternatively, the unit may have exactly two, exactly three, or more than three compressors, each of which individually provides the gas flow from ambient air. The two, three, or more than three units of the gas flow generation unit may also each generate a gas flow and combine the individual gas flows with from B. Each gas volume flow can then be connected together to provide the gas flow.

[0027] Compressed air applications offer fundamental advantages over other energy carriers. For example, when conveying individual components through hollow conduits such as hoses, using compressed air as a conveying medium offers several benefits. For instance, component conveying with compressed air is characterized by a comparatively low tendency for the components to jam against each other and / or against the conduit walls. Furthermore, the gas flow provides advantageous guidance. from B. Abrasion and dirt are removed from the pipe section without additional effort. Finally, for example... . A disruption on, for example, a central section of the compressed air delivery path, such as a leak in the pipe section or in the transport line, does not necessarily lead to an interruption of the element delivery.

[0028] Compressed air networks with centralized compressed air generation and distribution regularly require extensive pipelines and piping systems connected to components such as pressure tanks. Pressure losses occur in various ways and at numerous points. In addition to compression losses, network-related pressure losses, such as leakage, also have a detrimental effect.

[0029] For example, compression losses are pressure-dependent, and in known pressure systems with a central compressed air supply, a universal and therefore sometimes oversized pressure level often prevails for all connected, different applications. A resulting reduction in pressure, for example for applications requiring a correct conveying speed of the components, leads to the aforementioned losses.

[0030] The invention advantageously allows the use of compressed air to be utilized without sacrificing its benefits, as losses are minimized. When conveying, for example, individual components through hollow conduits such as hoses, the use of compressed air as a conveying medium offers advantages over other conveying techniques that operate without compressed air. These advantages include, for example, a comparatively low tendency to jam and the ability to carry away... from B. Abrasion and dirt from the compressed air line.

[0031] According to the invention, the gas or air flow is generated directly in the feed device or feed arrangement and not from an externally supplied compressed air system, such as a central compressed air supply. In particular, the feed device does not have a supply interface for a decentralized compressed air supply or can do without one. Accordingly, the feed device advantageously has, for example, no compressed air connection or compressed air inlet.

[0032] The gas flow generation unit is, for example, housed within a housing rack of the feed device. Alternatively, the gas flow generation unit is located externally on an outer surface of the feed device. In particular, the gas flow generation unit is located within an interior space of the feed device, which is surrounded by a housing or enclosure of the feed device. The interior space of the feed device is open at one point or on one side to the environment, e.g., to the surrounding space or the atmosphere. The feed device has no from B.A connection for an external compressed air supply is provided. Compressed air generated remotely from the supply device is not necessary or is omitted. The supply device does not require compressed air supplied externally, e.g., via a central compressed air supply line or compressed air line, and compressed air is not supplied to the supply device from the outside.

[0033] The gas power generation unit is located, for example, in the area or installation room where the supply device is located.

[0034] As an alternative to housing the gas flow generator within the feed device's enclosure, the gas flow generator can be located remotely but in the same installation space as the feed device. For example, the gas flow generator is separated from the rest of the feed device's sub-unit and connected to it via a connecting pipe or gas line to guide the gas flow.

[0035] The gas flow generator is alternatively connected via a gas line to the remaining sub-unit of the supply device. The gas flow generator is located, for example, within a radius of up to 10 meters from the remaining sub-unit of the supply device. The gas flow generator is located within a radius of, for example, up to 8 meters, within a radius of, for example, 6 meters, within a radius of, for example, 4 meters, or within a radius of, for example, up to 2 meters from the remaining sub-unit of the supply device.

[0036] Air at ambient pressure is drawn in by the gas flow generation unit. For this purpose, the gas flow generation unit has, for example, a suction device to draw in a gas volume equivalent to the volume of ambient air. The gas flow generation unit includes, for example, an axial compressor and / or a radial compressor.

[0037] With the gas flow generated locally in or at the feed device, which flows into the pipe section, for example via an airflow lock, from B. In a valve arrangement, a directed gas flow is generated in the pipe section, directed towards the connection point. The elements in the pipe section are surrounded by the gas flow. This directed gas flow carries the elements in the pipe section along and continues into the main pipeline.

[0038] The transport line connecting to the feed device at the connection point is not part of the feed device.

[0039] Preferably, the pipe section and the transport pipe have the same internal shape and / or the same internal diameter.

[0040] The section of the pipeline and the transport pipeline point from B. the same interior or cavity.

[0041] The feeding device, for example, is a movable unit, such as one equipped with rollers on the underside, similar to a peripheral unit. The feeding device is a handling-friendly peripheral unit, allowing it to be moved or wheeled by one person on a firm and level surface for positioning within the operating or working area. The feeding device is, for example, a separately positionable peripheral unit, allowing for variable spatial positioning of the feeding device relative to the processing equipment. In particular, the peripheral unit can be set up independently of the processing equipment's position. Only a sufficient length of transport cable is required.

[0042] According to the present invention, the gas flow generation device is configured to provide a gas flow at a low-pressure level with an absolute gas pressure between 1.03 bar and 1.50 bar on an outlet side of the gas flow generation device. This minimizes energy losses due to higher pressures of the supplied gas.

[0043] The increase in gas pressure by a thermal machine for compressible media such as gas or air is described by the parameter π, the pressure ratio. The parameter π describes the ratio of the gas pressure on a pressure side of the gas flow generation device to the gas pressure on an intake side of the gas flow generation device.

[0044] For example, the gas drawn in by the gas flow generating unit has an average ambient pressure. For example, the gas drawn in by the gas flow generating unit has an outlet pressure. The outlet pressure of the gas prevails on both the inlet and intake sides of the gas flow generating unit.

[0045] For example, the accelerated gas has an outlet pressure on the pressure side. This outlet pressure exists on the outlet side of the gas flow generation device.

[0046] For example, the gas flow generating device is adapted to the shape and / or size of the elements to be transported such that the elements move in the transport line at a speed between 3 meters per second (3 m / s) and 30 m / s. For example, the output pressure of the gas flow generated by the gas flow generating device is adapted to the shape and / or size of the elements to be transported. For example, the output pressure of the gas flow generated by the gas flow generating device is adapted to the type of elements and an inner cross-section of the transport line. For example, the output pressure of the gas flow generated by the gas flow generating device is adapted to the shape and / or size of the elements to be transported such that an element moves in the transport line at a speed between 3 meters per second (3 m / s) and 30 m / s.For example, an element in the transport line moves at a speed between 15 and 20 m / s.

[0047] For example, the gas flow generating device, such as a fan or a blower, operates with a pressure ratio characteristic π between 1.0 and 1.5.

[0048] For example, the gas flow generation unit does not generate a higher gas pressure on the pressure side, and thus not in the system encompassing the feed device, than is required for transporting the elements. The elements can be transported by the gas flow generated by the gas flow generation unit. For instance, there is no throttling of a comparatively high pressure from a central pressure supply to a pressure actually required for the respective application. Energy loss is avoided. Furthermore, for example, no storage tank is required for the gas supplied at a comparatively high pressure on the pressure side by the gas flow generation unit.

[0049] For example (not according to the present invention), the gas flow generating device is configured to provide a pressure ratio π in a range of 1.0 to ≤ 4. According to the invention, the gas flow generating device is configured to provide a pressure ratio π in a range of 1.03 to ≤ 1.5.

[0050] For example (not according to the present invention), the gas flow generating device is configured to provide a pressure ratio π in a range of 1.03 to ≤ 3.5, or to provide a pressure ratio π in a range of 1.03 to ≤ 3.0, or to provide a pressure ratio π in a range of 1.03 to ≤ 2.5, or to provide a pressure ratio π in a range of 1.03 to ≤ 2.0, or, according to the present invention, to provide a pressure ratio π in a range of 1.03 to ≤ 1.5.

[0051] For example, the gas power generation device includes a blower or a fan.

[0052] For example, a blower achieves medium volume flow rates with a medium pressure ratio π relative to its power output. For example, a fan achieves high volume flow rates with a low pressure ratio π relative to its power output.

[0053] For example, the gas flow generating device comprises exactly one blower. For example (not according to the present invention), the gas flow generating device comprises a blower that provides a pressure ratio π between 1.1 and ≤ 4.

[0054] For example, the blower has a radial design. For example, the blower has an axial design. For example, the gas flow generation device includes a radial blower or an axial blower. For example, the gas flow generation device is a blower. For example, the gas flow generation device is a radial compressor, such as a radial blower. For example, the gas flow generation device is an axial compressor, such as an axial blower.

[0055] For example, the blower is single-stage or multi-stage. For example, the gas flow generating device, such as the blower, has a filter element on one suction side of the blower, such as a filter assembly, for example comprising a filter medium or a filter layer.

[0056] For example, the blower for gas flow has a suction line on the suction side and a pressure line on the pressure side. On the suction and / or pressure side of the blower, the respective suction and pressure lines have a cross-sectional area that corresponds to 0.5 to 3 times the cross-sectional area of ​​the transport line from the feed device to the processing equipment. For example, the suction line and the pressure line have a cross-sectional area of ​​at least 30 square millimeters (mm²). For example, the suction line and the pressure line have a cross-sectional area of ​​at least 50 square millimeters (mm²).

[0057] For example, the blower has a classic fan characteristic curve or a classic blower characteristic curve, in which the volume flow requires the largest share of energy.

[0058] For example, the blower has an electrical power consumption between 50 watts (W) and 1500 watts, for example, 500 watts (W). The power consumption is essentially regulated by the blower's characteristic curve itself. Alternatively, the power consumption can be influenced indirectly, for example, via a tachometer whose recorded values ​​can be read and made available to a control system, for example, to control the blower's speed.

[0059] For example, the blower occupies a space that is at least approximately cuboid or cube-shaped and is, for example, in the range of 200 mm x 200 mm x 200 mm.

[0060] For example, the gas flow generating device includes exactly one fan. A fan, for instance, is an externally driven fluid machine that uses a rotating impeller to move a gaseous medium.

[0061] For example, the gas flow generating device includes a fan that provides a pressure ratio π between 1.0 and ≤ 1.1. For example, the gas flow generating device is a fan. For example, the gas flow generating device is an axial fan.

[0062] For example, the gas flow generation device is a radial fan.

[0063] For example, a higher pressure ratio π is provided by the gas flow generation device for smaller elements to be transported, for example by means of a radial blower. Alternatively, several fans or blowers can be connected in series. For example, two or more fans or blowers, such as axial blowers, can be connected in series.

[0064] For example, for larger elements to be transported, a lower pressure ratio π is provided by the gas flow generation device, for example by means of an axial blower or a fan.

[0065] For example, a gas flow generator conveys a gas, such as air, from an intake side to a pressure side. The intake side of the gas flow generator operates at an intake pressure, for example, a pressure of approximately 1 bar.

[0066] Furthermore, the gas conveyed by the gas flow generation device, such as air, is accelerated from the intake side to the pressure side of the gas flow generation device.

[0067] Normal atmospheric pressure refers to a standard pressure, for example, a mean atmospheric pressure of 1013.25 mbar, relative to sea level. The atmospheric pressure at a given location depends on factors such as the temperature of the gas and the altitude of that location.

[0068] For example, to calculate the pressure ratio π, an atmospheric pressure of 1013.25 mbar is used as a reference atmospheric pressure in the vicinity of the feed device or the gas flow generation unit. For example, the atmospheric pressure of 1013.25 mbar is defined as the intake pressure.

[0069] For example, the gas flow generation unit includes a blower that generates an output volume flow of up to 860 liters / minute (l / min).

[0070] For example, the gas flow generation device includes two or more fans connected in series. This allows a desired output pressure level to be achieved with several fans, whether identical or different, which is higher than the pressure-side level or the output pressure level achievable by a single fan.

[0071] For example, the gas flow generation device comprises two or more than two blowers connected in series. This allows a desired output pressure level to be achieved with several blowers, whether identical or different, which is higher than a pressure-side level or an output pressure level achievable by a single blower.

[0072] For example, the gas flow generating device, such as a fan or blower, has an electric drive, such as an electric motor, that can be operated at low voltage, for example at 24 volts or 48 volts. The electric motor is, for example, a brushless DC motor.

[0073] Advantageously, the gas flow generation unit includes a gas compression unit for providing the gas flow. The gas compression unit is, for example, an integral part of the feed device. The gas compression unit's performance parameters are adjustable and modifiable. The gas compression unit draws in and compresses gas, such as air, from the immediate vicinity of the feed device or the gas compression unit itself—that is, the ambient air surrounding the feed device. The design of the gas compression unit can be advantageously tailored to the specific conditions and requirements of the element conveying process. Factors such as friction and losses during element transport must be taken into account. The intake and compression of the air are precisely timed and precisely calibrated to the application and location where the compressed air is used.This minimizes losses and is therefore economically and ecologically advantageous.

[0074] In particular, the gas compression unit is designed to provide a variable gas flow over time. This allows for flexible use of the gas flow. A constant, continuous, or non-variable gas flow is also possible. The pressure level provided by the gas flow can be adjusted to be variable or constant by setting the gas compression unit.

[0075] It is also advantageous that the gas flow generation device includes a gas compression unit based on the turbo compressor principle to provide the gas flow. The gas compression unit, for example a turbo compressor, is a turbomachine, designed, for instance, as a radial or axial compressor. The turbo compressor has a rotating compressor element mounted in a compressor housing. The turbo compressor operates in the physical reverse of a turbine.

[0076] For example, the gas flow generation unit includes a gas compression unit to provide a gas flow generated on the pressure side of the pipeline section. The gas compression unit operates, for example, according to or based on the turbo compressor principle. The elements are surrounded by compressed air exiting the gas flow generation unit on the pressure side and are thus carried along the pipeline section.

[0077] Advantageously, the gas flow generation device includes, for example, a gas compression unit to provide a gas flow generated on the suction side of the pipeline. The gas compression unit operates, for example, according to or based on the turbo compressor principle. The elements are surrounded by air entering the gas flow generation device on the suction side and are thus carried along the pipeline section.

[0078] In an exemplary configuration, the gas flow generation unit comprises a gas compression unit with a radial compressor to provide the gas flow, the gas compression unit operating on the turbo compressor principle. This allows for flexible adjustment of the gas flow.

[0079] It is further proposed that the gas flow generation device, for example, includes a gas compression unit with an axial compressor to provide the gas flow, with the gas compression unit operating on the turbo compressor principle. This allows the gas flow to be flexibly adjusted.

[0080] Advantageously, the gas flow generation device includes a gas compression unit with a multi-stage compressor, the gas compression unit operating on the turbo compressor principle. A pressure level of the gas flow can thus be preset, for example, depending on the number of compressor stages.

[0081] Following an exemplary modification, a higher-level control unit is available for controlling a power stage of the gas power generation plant.

[0082] The control unit serves, for example, in particular to control a predefined, adjustable, and / or variable power level of the gas flow generation device. With the control unit, for example, the compressed air compression, compressed air generation, and the resulting available air output can be predefined and / or varied. The available air output can be adjusted by the control unit to a specific, realistic level. from B.The air supply can be adjusted to the currently required air demand, for example, dynamically. The actual air output is programmable and / or dynamically adjustable to the actual demand based on sensor values ​​acquired by the feeder's sensors. Acquired sensor values ​​relate, for example, to the velocity of the conveyed elements in the pipe section and / or the transport line. Based on the sensor-acquired velocity of the conveyed elements in the pipe section and / or the transport line, the control unit can adjust the velocity of the conveyed elements to a target or setpoint value, for example, stored in software.

[0083] According to an exemplary modification of the feeding device, sensor devices are provided for acquiring and providing sensor values ​​and for adjusting the gas flow demand. These sensor devices can acquire sensor values ​​relating to, for example, characteristic data concerning the elements and / or the gas flow. The sensor devices can acquire and provide sensor values ​​continuously or discontinuously. These sensor values ​​can be provided, for example, for further processing by the control unit. For example, the sensor devices and the provided sensor values ​​serve, in particular, for the dynamic adjustment of the gas flow demand. The sensor devices can, for example, provide data that depicts the velocity of the elements during transport through the pipe section and / or the transport line. The sensor devices are, for example, position sensors or...Position sensors, for example, with a defined distance to the object being measured. Other sensors are also possible, which acquire and transmit sensor data, for example, regarding the gas flow and / or the moving elements in the pipe section and / or the transport pipeline.

[0084] The data provided by the sensor means of the control unit makes it possible, for example, to control and / or adjust the speed of the elements to a target value for the speed of the elements when moving through the pipe section and / or the transport pipe.

[0085] The sensor devices include, for example, sensor devices from B. for gas pressure measurement and / or from B. for measuring the gas volume flow rate of the gas flow generated by the gas flow generation device.

[0086] Furthermore, it is advantageous if the feeding device is designed as a separate peripheral unit with a housing and an interior enclosed within the housing. This makes the feeding device flexible for use in different applications. For example, the peripheral unit can be designed as a mobile unit so that one person can operate the feeding device. from B. It can be moved manually within a setup room, especially to a desired location within the setup room.

[0087] The peripheral unit indicates from B. Driving means for the mobile movement of the peripheral unit or the feeding device, from B. Rollers or wheels.

[0088] The feeding device, for example, has at least one other component, from B.A sorting pot adjacent to the storage container and / or next to the pipeline section, a buffer section, and / or a singulation device. The singulation device serves, for example, to separate elements from a pre-arranged series of elements, such as the first or foremost element in the series before it enters the pipeline section.

[0089] The feeding device is designed to be adjustable, for example, to pre-load and feed elements to the processing tool. These elements include joining elements such as screws, rivets, self-piercing rivets, functional elements such as punched elements, self-piercing, press-fit, clinch rivet elements, press-fit bolts, and / or press-fit nuts. This makes the feeding device versatile and flexible for use in various setting tasks. The feeding device can be used to operate tools such as press, punch, or clinch tools and to feed the appropriate elements to the tool.

[0090] The elements are, for example, one-piece or single-unit elements.

[0091] For example, the pipe section and the transport pipe are appropriately matched to the elements that can be transported in it with the gas flow, for example to the shape and / or size of the elements.

[0092] Furthermore, the supply device includes, for example, a filter element for filtering the gas, which serves to provide the gas flow. The filter element is, for example, a gas filter such as a fine air filter and / or a coarse air filter. In particular, the filter element is located on the suction side of the gas flow generation device. This removes particles from the gas or the air drawn in by the gas flow generation device. The filter element can remove fine particles, such as dust particles, from the drawn-in gas or air almost completely, up to, for example, 90%. This effectively filters and cleans, for example, the entire volume of drawn-in, compressed, and / or accelerated air before it enters the gas flow generation device.

[0093] The present disclosure also relates to a feeding system with a hollow transport line and a feeding device, wherein a feeding device is provided according to one of the embodiments described above. The system therefore comprises a feeding device as described above and additionally the transport line. This allows different processing devices to be operated. The transport line comprises, for example, a flexible hollow feed hose or a rigid hollow line.

[0094] The elements are fed from the feeding device to a processing device in the transport line, for example, in a discrete element unit during the transport of the elements: e.g. individually, or as a unit of exactly two or exactly three or more adjacent, for example touching, elements in a row of elements.

[0095] The transport takes place via the pipe section and via the hollow transport pipe, whereby the transport pipe serves for the guided transport of the elements and bridges a distance between the feeding device and the processing device.

[0096] Finally, the invention extends to a system comprising a processing device for processing elements with a feeding system as described above. The system is, for example, a technology system with a decentralized compressed air supply and / or a decentralized compressed air provision. The gas flow generation device, e.g., a compressed air supply for providing and transporting the elements, is, for example, integrated into the feeding device.

[0097] The processing device is designed to process the elements fed by the feeding device. The processing device is from B. a tool for placing elements on a workpiece from B.to attach them to a workpiece. The system also includes, for example, a robot. The processing device is connected to a robot or mounted on a movable robot arm. The robot is primarily used to operate and move the processing device, for example, to attach the elements to a workpiece.

[0098] The processing device, for example designed as a rivet processing device, has a hydropneumatic or pneumohydraulic drive and from B. A C-shaped bracket with two arms. For example, a stamping unit is attached to one arm of the C-shaped bracket, and to the other arm... from B. a matrix unit of the processing device was included.

[0099] Alternatively from B.A robotic gripper can have an element magazine. With multiple processing devices, a technology system can be provided with, for example, exactly two or more than two processing devices or feeding devices.

[0100] For example, the processing device is provided with a gas flow generation device with which air can be drawn in from the environment of the processing device (3) to provide a gas flow, wherein a gas flow at a low-pressure level with an absolute gas pressure between 1.03 bar and 1.50 bar is provided on an outlet side of the gas flow generation device.

[0101] Alternatively, a processing device for elements is proposed, comprising a gas flow generation unit that draws in air from the environment of the processing device to provide a gas flow for transporting elements. The gas flow generation unit provides a low-pressure gas flow at an absolute pressure between 1.03 bar and 1.50 bar at an outlet. For example, the processing device has a storage container for a plurality of elements. The gas flow generation unit allows individual elements to be transported from the storage container to a transfer point on the processing device. At the transfer point, an element is, for example, . moved along by a movable stamp of the processing device and processed, for example pressed into a workpiece.

[0102] The processing unit with a gas flow generation device can also be used as an alternative to a processing unit without a gas flow generation device in the system described above. Figurenbeschreibung

[0103] Further features and advantages are explained in more detail using the schematically illustrated examples in the figures.

[0104] In detail: Fig. 1 a schematically represented system for attaching elements to workpieces, comprising a feeding device, a processing device and a transport line, Fig. 2 the order according to Fig. 1 without workpieces and without robots, Fig. 3 an upper section of the feeding device Fig. 1 and 2 Front view without a front-facing access door, Fig. 4 an alternative feeding device, prospectively without a front housing part, Fig. 5schematically depicts an alternative system with a feeding device, transport line and processing device with a suggested workpiece, Fig. 6 schematically represents a Fig. 5 alternative system and Fig. 7 a processing device with a gas power generation unit.

[0105] For corresponding elements of different embodiments, the same reference symbols are sometimes used.

[0106] Fig. 1 shows a System 1 for processing elements (not shown in the Fig. 1-3 ) in perspective view. System 1 comprises a feeding device 2, a processing device 3, and a hollow transport line 4. The transport line 4 is designed, for example, as a hollow, flexible feeding hose. The transport line 4 is connected to the processing device 3 at one end 4b via a line connection 3a of the processing device 3.

[0107] System 1 is used to act on or process workpieces 5, 6, 7, and 8 that are permanently attached to a processing station 11. The action on workpieces 5-8 to attach an element at a joint is carried out using the processing device 3 for processing the elements or, for example, for placing an element at the joint on the respective workpiece 5-8. For example, the angled workpieces 5-7 are each riveted to workpiece 8, which is designed as a flat sheet metal layer. The workpieces 5-7 are positioned at regular intervals from each other on a top surface of workpiece 8. The processing device 3 is designed according to Fig. 1 present in the area of ​​workpiece 5.

[0108] The processing device 3 is connected to a robot 9 or mounted on a movable robot arm 10 of the robot 9. The robot 9 serves to operate and spatially move the processing device 3, for example to attach the elements to the workpieces 5-8.

[0109] The processing device 3, designed, for example, as a rivet processing device, has a hydropneumatic or pneumohydraulic drive 15 and a C-frame 12 with two legs. A punch unit 13 is mounted on one leg of the C-frame 12, and a die unit 14 of the processing device 3 is mounted on the other leg (see figure). Fig. 2 ).

[0110] System 1, including robot 9 and processing station 11 with workpieces 5-8, is positioned in installation room R. Installation room R, which occupies, for example, part of a production hall, is in Fig. 1 schematically outlined with dashed lines, suggestive.

[0111] Fig. 2 The diagram shows system 1 without a robot, excluding workpieces 5-8.

[0112] The feeding device 2 and the processing device 3 are connected to each other via the hollow transport line 4. The elements are transported by a gas flow within the transport line 4, which is particularly gas-tight, in the transport direction T from the feeding device 2 to the processing device 3. The elements arriving at the processing device 3 are forwarded in corresponding sections of the processing device 3 and set at the respective joining point of the workpieces 5-8 by means of the punch unit 13. The processing device 3 is used, for example, to set rivets such as self-piercing rivets, clinch rivets, or functional elements onto the workpieces 5-8.

[0113] The feeding device 2 is designed as a separate peripheral unit for the processing device 3, for example with rollers 2a on the underside for moving the processing device 3 on a solid surface.

[0114] The feeding device 2 has a storage container 16 with a receiving volume 16a for holding or receiving a plurality of elements (not shown). The storage container 16 is connected to a sorting bowl 18 via a hollow, pipe-like intermediate piece 17, allowing individual element passage. In the sorting bowl 18, the elements arriving from the intermediate piece 17 are individually positioned in the correct orientation and transferred to a buffer line 19 connected to the sorting bowl 18. In the buffer line 19, the elements are arranged in a row, each in the same orientation. From the buffer line 19, the elements continue downwards to a singulation device 20 for the elements.

[0115] From the singulation device 20, the elements individually enter a hollow section of the line 21 of the feed device 2. Through the section of the line 21, the elements reach a connection point 22 of the feed device 2.

[0116] The elements from the feed device 2 can be discharged at connection point 22. The line section 21 is connected to connection point 22, for example. . gas-tight connection to one end 4a of the transport line 4. In the illustrated embodiment, the line section 21 and the transport line 4 are formed or connected integrally as a single unit. The line section 21 and the transport line 4 are, by way of example, formed by a single, continuous piece as a feed hose.

[0117] The elements can be transported by means of a gas flow G in line section 21 and in the transport line 4 from the connection point 22 to the processing device 3, which is spaced apart from the feed device 2. The elements are, for example, individually separated in the area of ​​the singulation device 20 from the gas flow in line section 21 (see figure). Fig. 3The elements are carried along by the prevailing gas flow G and transported towards the connection point 22. The gas flow continues in the transport line 4, so that the elements are moved from line section 21 into the transport line 4. Due to the gas flow G in the transport line, the elements are transported with low friction in the transport line 4 to an end 4b of the transport line 4. The end 4b of the transport line 4 extends to the line connection 3a on the processing device 3, for example in the area of ​​the punching unit 13. The end 4b of the transport line 4 is connected to the line connection 3a on the punching unit 13, through which the elements enter a punching channel of the punching unit 13 individually and in the correct position, for example, by being blown in with the help of the gas flow G.

[0118] The feed device 2 has a gas flow generating unit 23 for providing the gas flow G in the line section 21 and further in the transport line 4. For example, the gas flow generating unit 23 is an axial blower. The gas flow generating unit 23 is intended, for example, exclusively for the feed device 2, for conveying the elements by means of the gas flow G. Atmospheric air L is drawn in from the surroundings via a suction side 23a of the gas flow generating unit 23, which is open to the environment or atmosphere, and is compressed and / or accelerated in the gas flow generating unit 23. The gas flow generating unit 23 is from B.Electrically operable with an integrated drive or electric motor. A pressure side 23b of the gas flow generation unit 23 is connected, for example, to the singulation unit 20 via a compressed air connecting line 24. The compressed air-gas flow enters the section of line 21 connected to the singulation unit 20. The gas flow exerts a suction or carrying force on a singulated element at a discharge side of the singulation unit 20. The incoming compressed air flows into line section 21 and carries, for example, a single singulated element that is foremost in the singulation unit 20, and further into line section 21. The singulation unit 20 singulates the element foremost (viewed towards the singulation unit 20) from a series of elements that are located in the buffer line 19 at the singulation unit 20.

[0119] With the gas flow, the elements successively separated by the singulation device can be moved through the line section 21 to the connection point 22 by the active gas flow generation device 23.

[0120] In the connected state of line section 21 and transport line 4, the elements from the connection point 22 can be transported with the gas flow out of line section 21 and further transported in transport line 4 to the processing device 3.

[0121] The gas compressor unit 23 is designed to draw in air L from the environment of the feed device 2 on the suction side 23a of the gas compressor unit 23 in order to provide the gas flow.

[0122] The gas flow generation device 23 is configured to draw air at atmospheric pressure from the environment of the feed device 2, i.e., portions of the air in the installation space R of the feed device 2, onto the suction side 23a of the gas compressor unit 23 in order to provide the gas flow. The suction side 23a is located, for example, within a housing 25 of the feed device 2 or in an interior space 26 of the feed device 2 enclosed by the housing 25, wherein the interior space 26 is open to the environment or connected to the air space in the installation space R. Alternatively or additionally, the suction side 23a is, for example, located outside the housing 25 of the feed device 2 and open to the air space in the installation space R. The gas flow generation device 23 includes, for example, an airflow generator.

[0123] The box-like housing 25 has side walls 25a, a rear wall 25b, a base 25c, a top 25d, and a hinged door 25e. The top 25d is open to the environment by means of an open hinged flap, which Fig. 1 and 2 show that during the operation of the gas power generation unit 23, sufficient ambient air always reaches the suction side 23a of the gas power generation unit 23. A from B. Electrical wiring for supplying the feed device 2 with electrical power is not shown. For example, the feed device 2 does not have a supply interface for a decentralized compressed air supply. Accordingly, the feed device 2 has, for example... . no compressed air connection or inlet for supplying compressed air to system 1 that is externally or centrally provided.

[0124] The gas flow generation unit 23 includes, for example, a gas compression unit for the gas flow generated on the suction side in the line section 21. The gas flow can be provided by compressed and / or accelerated air with the gas flow generation unit 23, which is possible in various ways. The gas flow generation unit 23, for example, has a compressed air compression unit. The gas flow generation unit 23 operates, for example, according to the turbo compressor principle with a radial compressor and / or axial compressor, for example with a multi-stage radial compressor and / or with a multi-stage axial compressor.

[0125] An unspecified superior control unit 27 of the feeding device 2 has a computer control or software and a computer and storage unit and serves to control the operation of the feeding device. 2.The control unit 27 serves in particular to control a predefinable or adjustable and / or variable power level of the gas flow generation device 23. With the control unit 27, for example, the compressed air compression, the compressed air generation, and the resulting available air output can be predefinable and / or varied. The available air output can be adjusted with the control unit 27 to a specific actual... from B. The air demand can be adjusted to the currently required amount, for example, dynamically. The actual air demand is specifically programmable and / or from B.Based on sensor values ​​acquired by sensors (not shown), the system can be dynamically adjusted to the actual requirements. Acquired sensor values ​​relate, for example, to the speed of the conveyed elements in line section 21 and / or transport line 4. With control unit 27, the speed of the conveyed elements in line section 21 and / or transport line 4 can be adjusted to a target or setpoint value stored in software, based on the sensor-acquired speed of the conveyed elements.

[0126] The sensor means of the feed device 2 are intended for the acquisition and provision of the sensor values, for example for the provision of sensor values ​​for further processing by the control unit 27.

[0127] An alternative version of System 1, not shown, is characterized by the fact that a feeding device with the components according to Feeding Device 2, but without a housing 25, is directly present on the processing device 3. Alternatively, a feeding device with the functions or components according to Feeding Device 2 is present, for example, on the robot 9. The robot 9 includes, for example, a magazine for the elements with the storage container and / or additionally a sorting bowl and / or a buffer line. For a system designed as a technology system, for example, exactly one feeding device, or exactly two, or more than two feeding devices are provided. For example, it is also possible that in an alternative system at least one component according to Feeding Device 2 is present on the processing device 3 and at least one other component according to Feeding Device 2 is present on the robot 9.

[0128] In an alternative system or technology system, for example, it is arranged that the conveying of the elements at the processing device 3 and / or at the robot 9 is provided in order to convey the elements from a conveying device to a filling station of the processing device.

[0129] In an alternative system or technology system, for example, the elements are arranged to be conveyed from a magazine on the processing device to a processing station of the device, allowing for the presentation of a large number of elements. The processing station of the device includes, for example, a setting head comprising the punch unit and the die unit.

[0130] In a multi-lane overall system with, for example, parallel operating systems according to System 1, it is possible to configure the respective lane to be designed according to System 1 described above.

[0131] Another alternative system configuration is characterized by the presence of a standard, commercially available compressor in the feeding device 2 and / or on the processing device 3 and / or on the robot 9. The compressor operates, for example, on the positive displacement principle and is implemented as a piston or screw compressor.

[0132] Fig. 4 Figure 28 shows an alternative feeding device 28 to feeding device 2, without a front housing part. Feeding device 28 differs from feeding device 2 by the gas flow generation unit 23. The gas flow generation unit 23 according to Fig. 4The system is designed as a multi-stage radial blower 29. On the suction side to the gas generation unit 23, air L is drawn in from the environment, with a filter element 30 being positioned upstream of the radial blower 29. From an element transfer point 31 of a singulation unit 20, singulated elements are conveyed in the line section 21 to the connection point 22 with a low-pressure gas flow or air flow between 1.03 and 1.5 bar.

[0133] Fig. 5Figure 32 schematically depicts a system 32 with a feeding device 33 including a gas flow generation unit 23, and a hollow transport line 34 through which elements 35 can be individually transported to a processing unit 3 of the system 32 by means of a low-pressure gas flow. An element 35 transported to the processing unit 3 is attached to a workpiece W by the processing unit 3, for example, by pressing it into the workpiece W with the aid of a movable, power-driven punch of the processing unit 3. The workpiece W is supported, for example, by a die 36 of the processing unit 3. A plurality of elements 35 are stored in a reservoir 16 of the feeding device 33.

[0134] The gas flow generating device 23 is a single-stage or multi-stage axial or radial blower or a fan. An air flow or gas flow G with a constant absolute gas pressure between 1.03 and 1.50 is generated on the pressure side of the gas flow generating device 23.

[0135] The elements 35, separated in the singulation unit 20, are conveyed within the hollow transport line 34 to a setting head 3b with a stamping unit of the processing device 3 by the gas flow G provided by the gas flow generation unit 23. The gas flow G flows within the transport line 34 and is in Fig. 5 as also in Fig. 6 Shown as a flow arrow outside of transport line 34 for better illustration purposes only.

[0136] Fig. 6Figure 37 shows an alternative system 37 with a feed device 33 including a gas flow generation unit 23, a hollow transport line 34, through which elements 35 can be transported individually to a processing device 3 of the system 37 with a low-pressure gas flow provided by the gas flow generation unit 23.

[0137] A singulated element 35 is transferred into the transport line 34 by means of the singulation device 20. A gas flow G prevails in the hollow transport line 34 in the direction of the processing device 3, causing the elements 35 to reach the processing device 3 within the transport line 34. For example, one end 34a of the transport line 34 is moved back and forth between a point 20a on the singulation device 20, for receiving a single element 35 into the transport line 34, and the connection point 22. The connection point 22 from B.with your pressure-side outlet of the gas flow generation unit 23. In this way or in another way, a single element 35 can be brought into the transport line 34 and transported further to the processing unit 3. In system 37, a line section is missing in the feed device 33, or a line section 21 is missing according to the arrangements described above.

[0138] Fig. 7 Figure 3 shows an alternative processing device 38 to the processing device 3, on which a workpiece W is positioned on a die 36. The processing device 38 processes elements 35, which are plurally contained in a storage container 39. from B.A magazine in which processing device 38 are stored. The processing device 38 comprises a gas flow generation device 40, such as a blower or a fan. Gas or air can be drawn in from the environment of the processing device 38 by the gas flow generation device 40 to provide a gas flow G, wherein a gas flow G at a low-pressure level with an absolute gas pressure between 1.03 bar and 1.50 bar can be provided at an outlet side of the gas flow generation device 40. By means of the gas flow G with a gas pressure between 1.03 bar and 1.5 bar in a hollow transport line 41, the elements 35 from the storage container 39 can be fed individually to a setting head 3b of the processing device 38. Bezugszeichenliste

[0139] 1 System 2 Feeding device 2a Roller 3 Processing device 3a Line connection 3b Setting head 4 Transport line 4a, 4b End 5-8 Workpiece 9 Robot 10 Robot arm 11 Processing station 12 C-bracket 13 Punching unit 14 Die unit 15 Drive 16 Storage container 16a Intake volume 17 Intermediate piece 18 Sorting pot 19 Buffer line 20 Singulation device 20a Position 21 Line section 22 Connection point 23 Gas flow generation device 23a Suction side 23b Pressure side 24 Connecting line 25 Housing 25a Side wall 25b Rear wall 25c Bottom 25d Top 25e Door 26 Interior 27 Control unit 28 Feeding device 29 Radial blower 30 Filter element 31 Element transfer point 32 System 33 Feeding device 34 Transport line 34a End 35 Element 36 Die 37 System 38 Processing unit 39 Storage container 40 Gas flow generation unit 41 Transport line

Claims

1. Supply device (2, 28, 33) for elements (35), wherein the elements (35) are able to be moved to a connection point (22) of the supply device (2, 28, 33), wherein the supply device (2, 28, 33) is designed as a separately positionable peripheral unit for supplying a processing apparatus (3) with elements (35), wherein the elements (35) are able to be ejected from the supply device (2, 28, 33) by way of the connection point (22), and wherein the connection point (22) is configured to connect to a hollow transport line (4, 34) that is connectable to the supply device (2, 28, 33) in such a way that in the connected state of the transport line (4, 34) the elements (35) are able to be transported in the hollow transport line (4, 34) from the connection point (22) to the processing apparatus (3) spaced apart from the supply device (2, 28, 33), wherein the elements (35) are able to be transported by means of a gas flow, wherein the supply device (2, 28, 33) has a gas flow generation installation (23) which provides the gas flow in such a manner that, by virtue of the gas flow, the elements (35) are able to be transported from the connection point (22) by virtue of the gas flow provided by the gas flow generation installation (23), wherein the supply device (2, 28, 33) is present in an installation space, wherein the gas flow generation installation (23) is configured to induct air from the environment of the supply device (2, 28, 33) in the installation space of the supply device (2, 28, 33) in order to provide the gas flow, characterized in that the gas flow generation installation (23) is configured to provide a gas flow at a low-pressure level with an absolute gas pressure between 1.03 bar and 1.50 bar at an outlet side of the gas flow generation installation (23).

2. Supply device (2, 28, 33) according to Claim 1, wherein the gas flow generation installation (23) comprises a fan (29) or a ventilator.

3. Supply device (2, 28, 33) according to one of the preceding claims, wherein the supply device (2, 28, 33) has a hollow line portion (21) through which the elements (35) are able to be moved from an element transfer point (31), at which the elements (35) are able to be introduced into the line portion (21), to the connection point (22) of the supply device (2, 28, 33).

4. Supply device (2, 28, 33) according to one of the preceding claims, wherein the elements which are able to be moved in the line portion (21) are able to be moved, in the connected state of the line portion (21) with the transport line (4), the elements from the element transfer point through the line portion (21) to the connection point by virtue of the gas flow in the line portion (21).

5. Supply device (2, 28, 33) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit for providing the gas flow.

6. Supply device (2, 28, 33) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit according to the turbo-compressor principle for providing the gas flow.

7. Supply device (2) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit for providing a gas flow generated at the pressure-side in the line portion (21).

8. Supply device (2) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit for providing a gas flow generated at the suction-side in the line portion (21).

9. Supply device (2) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit with a radial compressor for providing the gas flow, wherein the gas compression unit operates according to the turbo-compressor principle.

10. Supply device (2) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit with an axial compressor for providing the gas flow, wherein the gas compression unit operates according to the turbo-compressor principle.

11. Supply device (2) according to one of the preceding claims, wherein the gas flow generation installation (23) comprises a gas compression unit with a multi-stage compressor, wherein the gas compression unit operates according to the turbo-compressor principle.

12. Supply device (2) according to one of the preceding claims, wherein a superordinate control unit (27) for controlling an output stage of the gas flow generation installation (23) is present.

13. Supply device (2, 28, 33) according to one of the preceding claims, wherein sensor means for detecting and providing sensor values and for adapting a gas flow demand for providing the gas flow are present.

14. Supply device (2, 28, 33) according to one of the preceding claims, wherein the supply device (2, 28, 33) is configured as a separate peripheral unit with a housing (25) and an interior (26) of the supply device (2, 28, 33) that is surrounded by the housing (25).

15. Supply device (2, 28, 33) according to one of the preceding claims, wherein the supply device (2) is configured to be adaptable in such a manner so as to offer up elements (35) and to supply the latter from the supply device (2, 28, 33) to the processing apparatus (3), wherein the elements (35) are joining elements such as screws, rivets, punch rivets, functional elements such as stamping elements, punching elements, pressing elements, clinch-riveting elements, press-fit bolts and / or press-fit nuts.

16. Supply device (2, 28, 33) according to one of the preceding claims, wherein the supply device (2) has a filter unit (30) for filtering the gas, which serves to provide the gas flow.

17. System (1, 32) having a processing apparatus (3) for processing elements (35) and having a hollow transport line (4, 34) and a supply device (2, 28, 33) according to one of the preceding claims.

18. Processing apparatus (38) for elements (35), comprising a gas flow generation installation (40) by way of which air from the environment of the processing apparatus (38) is able to be inducted in order to provide a gas flow for transporting elements (35), wherein the gas flow generation installation (40) is designed for providing at an outlet side of the gas flow generation installation (38) a gas flow at a low-pressure level with an absolute gas pressure between 1.03 bar and 1.50 bar.