Workpiece carrier

Abstract

The invention relates to a workpiece carrier (1) having: a top side (o) for receiving a workpiece; four profile bodies (2, 21, 22) forming a rectangular frame (3) of the workpiece carrier (1); and at least one (first) support (4, 41) connected to each of the two profile bodies (2, 21) opposite one another. According to the invention, the stability of the workpiece carrier (1) is improved in that at least two profile bodies (2, 21) connected to the at least one (first) support element (4, 41) each have a (first) bearing surface (5, 51) facing the top side (o), on which the at least one (first) support element (4, 41) is placed.

Description

Technical Field

[0001] The present invention relates to a workpiece carrier according to the preamble of claim 1, in particular to a workpiece carrier having a top side for accommodating a workpiece, four profile bodies forming a rectangular frame of the workpiece carrier, and at least one support member respectively connected to two profile bodies opposite to each other. Background Art

[0002] The workpiece carrier of the aforementioned construction type can be moved by means of a transport line, which consists of a plurality of transport modules. Such a transport line is also referred to as a conveyor by those skilled in the art. The transport modules have a conveying device (Mitnahmevorrichtung), which comprises a plurality of conveying rollers arranged in a row along the transport direction and driven by means of a motor. The transport line can also be referred to as a conveyor line. The workpiece carrier positioned on the transport line can be moved by means of conveying rollers.

[0003] Existing technology:

[0004] A workpiece carrier with a frame is known from the republished DE 10 2022 203 859, which is reinforced with support members inside. The support members are constructed as aluminum extruded profiles like an external frame. These aluminum extruded profiles are fixedly connected to each other, wherein they are particularly screwed to each other by parallel connectors and angle connectors. Observed in cross section, the aluminum extruded profile has a T-shaped groove, which can be used for this purpose. Due to this lightweight design, the workpiece carrier can be supported at multiple locations by corresponding belt conveyors, so it will not deform under the weight of heavy workpieces. This support occurs on a working surface formed by a plastic strip, which is fixedly connected, especially screwed, to the assigned aluminum extruded profile. All flat working surfaces are arranged in a common first transport plane. The working surface extends along the rectangular edge of the workpiece carrier with a constant width. Here, the longer rectangular side is oriented parallel to the transport direction, wherein two parallel working surface tracks are formed there, and their distance is adapted to the distance of the two belt conveyors. A total of three working surface tracks are arranged perpendicular to the transport direction. Accordingly, the adapted transport module has three parallel conveyors to avoid bending along the long rectangular sides. However, the reinforcement structure made of a plurality of aluminum extruded profiles inside the workpiece carrier takes up a lot of space and thus hinders access to the transported workpieces from below.

[0005] EP 2 946 874 B1 discloses a square or rectangular workpiece carrier with a square or rectangular support plate of constant thickness. The support plate is made of plastic, steel or aluminum. The support plate is enclosed in an adapted square frame, which consists of four individual frame parts, which are identically constructed. In the case of a rectangular workpiece carrier, these differ only in length. However, only light workpieces can be supported by means of this workpiece carrier. In particular, when the support plate has corresponding dimensions, the stability of the support plate is not sufficient to also support larger, heavier workpieces. Summary of the invention

[0006] The object of the present invention is therefore to provide a workpiece carrier which reduces or eliminates the problems of the prior art. In particular, the stability of the workpiece carrier is to be increased so that even heavier workpieces can be supported. Furthermore, the workpiece should still be accessible from below.

[0007] This object is achieved by a workpiece carrier according to claim 1 .

[0008] Further advantageous embodiments are the subject matter of the dependent claims.

[0009] One aspect of the invention firstly consists essentially in that at least two profile bodies connected to the at least one (first) support element each have a (first) support surface facing the top side, on which the at least one (first) support element rests.

[0010] The workpiece carrier can thus be constructed particularly lightly and material-savingly, in particular very stably, and can nevertheless bear the high loads occurring during operation, in particular battery modules for electric vehicles. However, the elastic deformations of the workpiece carrier which inevitably occur as a result do not impede the transport of the workpiece carrier by means of a transport line. In other words, these elastic deformations are correspondingly small and are therefore tolerable.

[0011] The workpiece carrier can be produced in any desired size in a simple manner without requiring any special tools. The workpiece carrier can thus be infinitely scalable in length and width using simple methods. The support element and the profile body can in particular be cut easily to the required length, wherein apart from this cutting substantially no further processing steps of the support element and the profile body are necessary.

[0012] Interference contour formed by support and profile body This means that the portion of the air space through which the workpiece carrier can be passed, in particular from below, is larger than the interfering contour portion.

[0013] The support elements form a variable and flexible internal structure. The workpiece carrier can thus be easily scaled in terms of its load-bearing capacity. To this end, only the number and / or position of the load-bearing supports need to be changed.

[0014] Preferably, the top side for receiving the workpiece is arranged or configured at the top side of the at least one (first) support. The corresponding bearing surfaces of the at least two (first) profile bodies for the at least one (first) support are arranged below the top side for receiving the workpiece. The corresponding (first) bearing surfaces of the at least two profile bodies for the at least one (first) support are preferably parallel to the top side for receiving the workpiece.

[0015] Preferably, the support element is configured as a hollow profile and is preferably made of steel, in particular stainless steel. Preferably, the profile body is made of aluminum, wherein it is preferably manufactured in an extrusion process.

[0016] Preferably, the workpiece carrier has at least one working surface on its underside, by means of which the workpiece carrier can be supported on the conveyor on the one hand and can be driven by the conveyor on the other hand, preferably by frictional contact. A distance is formed between the working surface and the support surface, which preferably has a value between 25 mm and 35 mm, particularly preferably has a value between 28 mm and 32 mm, in particular has a value of 30 mm.

[0017] In particular, in the unloaded state of the workpiece carrier, the distance between the working surface and the support surface creates a free structural space between the bottom side of the support element and the plane in which the working surface is located. This allows the function of feeding the workpiece carrier and the function of supporting the workpiece by means of the workpiece carrier to be separated from each other. In other words, due to the distance, the support element can be bent accordingly when the workpiece carrier is loaded, without the feeding / guiding of the workpiece carrier on the transport line being adversely affected.

[0018] It may be advantageous if an undercut, in particular T-shaped, groove is provided in the contact surface, to which groove the support element is fastened by means of a clamping band which partially surrounds the support element.

[0019] Thus, no further processing is required on the support profile for manufacturing the support except for cutting. Preferably, the clamping band is constructed in the form of a sheet metal part with multiple right-angle bends, preferably of constant thickness. Preferably, the clamping band is connected to the profile body on both sides of the support using clamping blocks arranged in side grooves and screws passing through the clamping band and screwed into the clamping blocks. Therefore, due to the clamping band, no fastening means, such as these grooves, are required on the support itself. As an alternative to the clamping block with the screwed-in screw, a hammer head bolt with a corresponding nut can also be used, wherein the bolt head of the hammer head bolt is then arranged in the groove. The support does not have to be fastened with a clamping band. As an alternative to the clamping band, other fastening options for the support can also be conceived. For example, an angle piece (Winkelstück) can be connected, in particular threaded, to one of the support surface and the support respectively. In particular, two angle pieces on the mutually opposite sides of the support can be connected to the support and the support surface respectively, wherein the support then has corresponding holes.

[0020] It is further preferred that at least one support element is configured as at least a first support element and is placed on a first support surface of the first profile body. A second support element is oriented substantially perpendicularly or transversely to the first support element and is placed on a second support surface of a second profile body oriented substantially perpendicularly to the first profile body. At least one second support element is arranged below at least one first support element.

[0021] Preferably, at least one first support is placed on at least one second support. The first support and the second support each have a cross section, preferably each have a substantially rectangular cross section. The first support and the second support in particular each directly abut against each other on the longer rectangular side. However, it is also conceivable that the first support and the second support each directly abut against each other on the shorter rectangular side.

[0022] Preferably, an undercut, in particular T-shaped groove is also provided on the second bearing surface, wherein at least one associated second support element is fastened at the undercut groove by means of a clamping band which partially surrounds the support element. All clamping bands are preferably designed in the same manner.

[0023] According to a preferred embodiment of the workpiece carrier, the preferably one-piece or multi-piece joint element is clamped to the first support and the second support, respectively. For this purpose, the joint element has a total of four plate-shaped sections. However, it is also conceivable to omit the joint element.

[0024] The first support and the second support are connected to each other in particular at a corresponding so-called node area, at which the first support and the second support pass each other. Preferably, clamping is performed towards the shorter rectangular side of the support, especially when the first support and the second support are respectively directly against each other on the longer rectangular side. However, it is also conceivable that clamping is performed on the longer rectangular side of the support, especially when the first support and the second support are respectively directly against each other on the shorter rectangular side. Preferably, clamping is performed between two corresponding plate-like sections that are opposite to each other. The two plate-like sections provided for clamping the first support are arranged in a manner perpendicular to the two plate-like sections provided for clamping the second support. Relative movement between the supports is prevented by the node element. The node element can be constructed as an (aluminum) die casting, a plastic injection molding or a bent sheet metal part.

[0025] According to a particularly preferred embodiment of the workpiece carrier, all four profile bodies have a first support surface and a second support surface. The second support surface is arranged further inwardly relative to the frame than the first support surface. Thus, a step is correspondingly formed on the inner side of the profile body.

[0026] The first bearing surface and the second bearing surface are preferably parallel to each other. A distance is formed between the first bearing surface and the second bearing surface, which distance preferably substantially corresponds to the height of the second support element.

[0027] Preferably, all four profile bodies have the same cross-sectional shape, which remains essentially the same over their respective lengths. Thus, the profile bodies can be manufactured particularly easily and cost-effectively, for example by an extrusion process with subsequent cutting.

[0028] Further preferably, the first support member and the second support member have the same, substantially keep the same, preferably rectangular cross-sectional shape on their respective lengths. Therefore, the first support member and the second support member can also be manufactured particularly easily and cost-effectively, for example by an extrusion process together with subsequent cutting.

[0029] According to another embodiment of the workpiece carrier, at least two, preferably multiple, first and / or second support members are provided. The multiple (first) support members are then preferably parallel to each other. The multiple (second) support members are then also preferably parallel to each other.

[0030] Since the second support is oriented substantially perpendicularly or transversely to the first support, the first and second supports form a carrier grid. It is very easy to omit or add first and / or second supports and to change their distances so that the stability of the workpiece carrier meets the requirements for the workpiece carrier.

[0031] Advantageously, a corner connector is provided at each corner of the workpiece carrier, and the corner connector is connected to two adjacent profile bodies respectively. The corner connector particularly extends the second support surfaces of the two adjacent profile bodies in an aligned manner.

[0032] The profile bodies can be connected to one another particularly easily by means of the corner connectors, in particular even when the profile bodies have the same cross-sectional shape which remains essentially the same over their respective lengths. The screw connection between the corner connector and the profile body is preferably carried out away from the second lower support surface, i.e. in a region of the profile body which is located further outwards with respect to the frame than the outer edge of the second lower support surface.

[0033] In summary, such a workpiece carrier is suitable for a wide variety of applications, for example for the transport / handling of battery modules for electric vehicles along a transport line / conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The preferred embodiments are described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A schematic representation of a workpiece carrier according to a preferred embodiment of the invention is shown in a three-dimensional view essentially toward the top side of the workpiece carrier;

[0036] Figure 2 The three-dimensional view essentially toward the bottom side of the workpiece carrier is shown. Figure 1 A schematic diagram of a workpiece carrier in FIG.

[0037] Figure 3 The cross-sectional view shows Figure 1 A schematic diagram of a part of a workpiece carrier in FIG.

[0038] Figure 4 Shown in three-dimensional view Figure 1 A schematic diagram of a part of a (first) profile body and a (first) support member of a workpiece carrier in FIG.

[0039] Figure 5 Shown in three-dimensional view Figure 1 A schematic diagram of a portion of a (second) profile body and a (second) support member of a workpiece carrier in FIG.

[0040] Figure 6 Shown in three-dimensional view Figure 1 A schematic diagram of a first support member and a second support member of a workpiece carrier and a partial view of a node element;

[0041] Figure 7 Shown in three-dimensional view Figure 6 The node elements in

[0042] Figure 8 The three-dimensional view essentially toward the top side of the workpiece carrier is shown. Figure 1 A schematic diagram of a portion of a workpiece carrier in which, in particular, corner connectors are provided;

[0043] Fig. 9 The three-dimensional view essentially toward the bottom side of the workpiece carrier is shown. Figure 1 Schematic diagram of a detail of a workpiece carrier in FIG. 1 , wherein in particular corner connecting pieces are provided. DETAILED DESCRIPTION

[0044] according to Figure 1 and Figure 2 The workpiece carrier 1 has, for example, a top side o for receiving a workpiece, four profile bodies 2, 21, 22 forming a rectangular frame 3 of the workpiece carrier 1 and at least one (first) support element 4, 41 respectively connected to two opposite profile bodies 2, 21.

[0045] A space is formed in the frame 3 which is open toward the top side o and the bottom side u of the workpiece carrier 1 and is penetrated by the supports 4 , 41 or the supports 4 , 41 are arranged in this open space.

[0046] The top side o is formed in particular by means of at least one (first) support element 4, 41 and / or the four profile bodies 2, 21, 22. It is also conceivable that a support plate, preferably of constant thickness, is connected to the top side of at least one profile body and / or to the top side of at least one first support element, wherein the workpiece can then be supported by means of the top side of such a support plate and thus at least partially forms the top side of the workpiece carrier by means of the top side of such a support plate. Such a support plate preferably extends over the entire top side of the workpiece carrier or only over a part of the top side of the workpiece carrier. It is also conceivable that two or more such support plates are provided.

[0047] At least two profile bodies 2, 21 connected to at least one (first) support element 4, 41 each have a (first) support surface 5, 51 facing the top side o, on which at least one (first) support element 4, 41 is placed. The top side o and the support surface 5, 51 are parallel to each other. Therefore, the support element 4, 41 is supported on the support surface 5, 51. Therefore, the workpiece arranged on the support element 4, 41 can also be supported on the support surface 5, 51 by means of the support element 4, 41. The support element 4, 41 preferably also rests with its end faces on the profile bodies 2, 21 opposite to each other, that is, respectively on the area of ​​the corresponding profile body 2, 21 oriented perpendicular to the corresponding support surface 5, 51. The workpiece carrier 1 has at least one working surface 6 on its bottom side u, by means of which the workpiece carrier 1 can be supported on the conveyor on the one hand and can be driven on the other hand by means of the conveyor, preferably by friction contact.

[0048] The working surface 6 is formed on a slide bar 61, which is arranged on the bottom side of the profile body 2, 21, 22 and is particularly connected to the profile body 2, 21, 22. Preferably, the slide bar 61 is connected to the profile body 2, 21, 22 by at least two clamping blocks respectively arranged in the lower grooves of the profile body 2, 21, 22 and by screws passing through the corresponding slide bar 61 and screwed into the corresponding clamping blocks. The slide bar 61 has corresponding holes for receiving these screws. The slide bar 61 has a separator channel 62, or the separator channel 62 is constructed between each two slide bars 61. The separator of the transport line for conveying / processing the workpiece carrier 1 can be guided through such a separator channel 62, wherein the slide bar 61 opposite to the corresponding separator channel 62 serves as a stop for such a separator. As an alternative to connecting the slide bar to the associated profile body by means of a screw connection, it is also conceivable that the slide bar surrounds the associated profile body in a U-shape and that the inwardly directed tabs respectively engage from the lateral legs of the U-shaped slide bar into a groove which, for its part, is introduced into two opposite longitudinal sides of the associated profile body. The slide bar can then advantageously be designed to be particularly thin, so that the conveyor roller is less likely to be pressed into the slide bar.

[0049] The slide strip can be used as a fastening element for a switching element required for position interrogation or position determination of a sensor arranged below the workpiece carrier.

[0050] Especially Figure 3 As shown, a distance a is formed between the working surface 6 and the supporting surface 5, which preferably has a value between 25 mm and 35 mm, particularly preferably has a value between 28 mm and 32 mm, and in particular has a value of 30 mm. Therefore, the support 4 placed on the supporting surface 5 can be bent to a value equal to the distance a when loaded by the workpiece, and the support 4 does not pass through the bottom side u of the workpiece carrier 1 or the plane where the bottom side u is located. The support 4 and the workpiece to be transported are adapted to each other accordingly, so that the support 4 is bent to the maximum extent to a value equal to the distance a when loaded by the workpiece. This ensures that the transportation of the workpiece carrier 1 by means of the transport line will not be disturbed by the support 4.

[0051] An undercut, in particular T-shaped, recess 7 is provided in the support surface 5, to which the support element 4 is fastened by means of a clamping band 8 which partially surrounds the support element 4. The support element 4 contacts the associated support surface 5 on one side and the clamping band 8 on the other side.

[0052] At least one support element 4, 41 is configured as at least one first support element 41 and in particular as Figure 4The second support member 42 is oriented substantially perpendicularly or transversely to the first support member 41 and is particularly oriented as shown. Figure 5 The arrangement shown is on a second support surface 52 of a second profile body 22 which is oriented substantially perpendicularly to the first profile body 21. The at least one second support element 42 is arranged below the at least one first support element 41.

[0053] At least two, preferably a plurality of first and / or second support members 41, 42 are provided respectively. Figure 1 and Figure 2 In the embodiment of the workpiece carrier 1 in FIG. 1 , two mutually parallel first supports 41 and three mutually parallel second supports 42 are provided. Depending on the expected load of the workpiece carrier 1 during its operation, fewer or more first supports and / or second supports 41, 42 can also be connected to the frame 3. It is also conceivable that only mutually parallel first supports 4, 41 or only mutually parallel second supports 4, 42 (hereinafter referred to as supports 4) are part of the workpiece carrier 1. Then, preferably, only one support surface 5 is formed on the profile body 2 instead of two support surfaces 51, 52.

[0054] Preferably, the one-piece or multi-piece node element 9 is clamped to the first and second support members 41, 42, respectively, and for this purpose has a total of four plate-shaped sections. This connection is also particularly Figure 6 As shown in FIG. 1 , the node element 9 is located separately in Figure 7 According to Figure 1 and Figure 2 , such node elements 9 are respectively arranged in all node areas where the first and second supports 41, 42 pass through each other. However, it is also conceivable that node elements 9 are correspondingly arranged only at selected node areas. Despite the presence of node elements 9, the first and second supports 41, 42 in the node area are still placed overlapping each other. For this purpose, the node element 9 is constructed in a way that it passes through its middle. The node elements 9 respectively have four corner areas oriented perpendicular to the axis of the supports 41, 42. One of the corresponding four plate-shaped sections is formed between each two of the corner areas in these corner areas. The node elements 9 respectively have a height perpendicular to the axis of the supports 41, 42, and the value of this height is less than the sum of the heights of the supports 41, 42 arranged here, so that the supports 41, 42 partially protrude from the node element 9 perpendicular to their axis.

[0055] The space open to the top side o and the bottom side u of the workpiece carrier 1 in the frame 3 is penetrated by the second support members 4, 42 and the joint element 9 in addition to the first support members 4, 41, or the first support members 4, 41, the second support members 4, 42 and the joint element 9 are arranged in the open space. However, other components of the workpiece carrier 1 are preferably not arranged in the open space. Therefore, it is possible to achieve particularly good access to the workpiece arranged on the top side o of the workpiece carrier 1 from the bottom side u of the workpiece carrier 1.

[0056] All four profile bodies 2, 21, 22 have a first and a second bearing surface 51, 52. The second bearing surface 52 is arranged further inwards relative to the frame 3 than the first bearing surface 51. Figures 3 to 5 It can be seen in FIG. 1 that the profile bodies 2 , 21 , 22 are designed in a stepped manner in cross section.

[0057] It is thus possible for all four profile bodies 2 , 21 , 22 to have the same cross-sectional shape, which remains essentially the same over their respective lengths.

[0058] Preferably, the profile bodies 2, 21, 22 are produced by cutting, in particular sawing, from profiles of corresponding cross-sectional shapes but greater length. If all profile bodies 2, 21, 22 have the same cross-sectional shape, only one profile with the same desired cross-sectional shape is required to produce the frame 3 of the workpiece carrier 1.

[0059] The first and second support elements 41 , 42 have the same, preferably rectangular, cross-sectional shape which remains essentially the same over their respective lengths.

[0060] If the first and second supports 41, 42 have the same cross-sectional shape, only one profile having the desired same cross-sectional shape is required to manufacture the first and second supports 41, 42. The first and second supports 41, 42 are configured as hollow profiles.

[0061] Below the lower second support surface 5, 52, in particular from Figures 3 to 5It can be seen that the internal groove 11 is constructed in the profile body 2, 21, 22. The opening of the internal groove 11 is oriented toward the corresponding opposite profile body 2, 21, 22. By means of two internal grooves 11 opposite to each other, a further transverse profile can be connected to two profile bodies 2, 21, 22 opposite to each other and can therefore be arranged between two profile bodies 2, 21, 22 opposite to each other. At the bottom side of such a transverse profile, a further working surface can be formed, which preferably has a correspondingly arranged sliding strip here, so that the workpiece carrier can then also be supported on the transport line here. The transverse profile is used to transfer force from the second support member 42 directly to the sliding strip 61.

[0062] Such a transverse profile can be arranged completely below the lower support 4, 42, wherein the transverse profile can have a height whose value does not exceed the value of the distance a to ensure that the transverse profile can also be arranged completely below the lower support 4, 42, but above the plane of the working surface 6. In particular, such a transverse profile is parallel to the first support or the second support 41, 42.

[0063] A corner connector 10 is provided at each corner of the workpiece carrier 1 and is connected to two adjacent profile bodies 2, 21, 22. In particular, the corner connector 10 extends the second support surfaces 52 of the two adjacent profile bodies 2, 21, 22 in an aligned manner. The corner connector 10 is configured as a die-cast component.

[0064] A guide roller 12 is supported on one side at the bottom side of the corner connector 10. The guide roller 12 can be constructed as an injection molded component. The guide roller 12 is arranged recessed relative to the bottom side u of the workpiece carrier 1, in particular the slide bar 61. Therefore, the guide roller 12 or its support device does not pass through the plane where the working surface 6 is located. The guide roller 12 is used on the one hand to turn the workpiece carrier 1 at the bend of the transport line, and on the other hand, it is also used for lateral guidance during straight transport. The corresponding one-sided support device of the guide roller 12 is used to reduce the height of the structural space of the workpiece carrier 1.

[0065] List of reference numerals:

[0066] 1 Workpiece carrier

[0067] 2 Profile body

[0068] 21. First profile body

[0069] 22 Second profile body

[0070] 3 Framework

[0071] 4 Support

[0072] 41 first support member

[0073] 42 second support member

[0074] 5 Support surface

[0075] 51 First bearing surface

[0076] 52 Second bearing surface

[0077] 6 Working surface

[0078] 61 Sliders

[0079] 62 splitter channels

[0080] 7 Grooves

[0081] 8 Clamping hoop

[0082] 9 Node Elements

[0083] 10 Angle connector

[0084] 11 Internal groove

[0085] 12 Guide rollers

[0086] o Top side of workpiece carrier 1

[0087] u Bottom side of workpiece carrier 1

[0088] a Distance

Claims

1. A workpiece carrier (1), comprising: a top side (o) for receiving a workpiece; four profile bodies (2, 21, 22) forming a rectangular frame (3) of the workpiece carrier (1); and at least one (first) support member (4, 41) connected to two profile bodies (2, 21) lying opposite each other, characterized in that: At least two profile bodies (2, 21) connected to the at least one (first) support member (4, 41) respectively have a (first) support surface (5, 51) facing the top side (o), on which the at least one (first) support member (4, 41) is placed.

2. The workpiece carrier (1) according to claim 1, characterized in that The workpiece carrier (1) has at least one working surface (6) on its bottom side (u), by means of which the workpiece carrier (1) can be supported on a conveyor on the one hand and can be driven on the other hand by means of the conveyor, preferably by friction contact, wherein a distance (a) is formed between the working surface (6) and the supporting surface (5), which distance preferably has a value between 25 mm and 35 mm, particularly preferably has a value between 28 mm and 32 mm, in particular has a value of 30 mm.

3. The workpiece carrier (1) according to any one of the preceding claims, characterized in that An undercut, in particular T-shaped, groove (7) is provided in the support surface (5), to which the support element (4) is fastened by means of a clamping band (8) which partially surrounds the support element (4).

4. The workpiece carrier (1) according to any one of the preceding claims, characterized in that At least one support member (4, 41) is constructed as at least one first support member (41) and is placed on a first support surface (51) of a first profile body (21), and a second support member (42) is oriented substantially perpendicularly or transversely to the first support member (41) and is placed on a second support surface (52) of a second profile body (22) oriented substantially perpendicularly to the first profile body (21), wherein the at least one second support member (42) is arranged below the at least one first support member (41).

5. The workpiece carrier (1) according to claim 4, characterized in that Preferably, the one-piece or multi-piece joint element (9) is clamped to the first and second support parts (41, 42) respectively and for this purpose the joint element (9) has a total of four plate-shaped sections.

6. The workpiece carrier (1) according to any one of claims 4 or 5, characterized in that All four profile bodies (2, 21, 22) have a first support surface and a second support surface (51, 52), and the second support surface (52) is arranged further inwardly relative to the frame (3) than the first support surface (51).

7. The workpiece carrier (1) according to any one of the preceding claims, characterized in that All four profile bodies (2, 21, 22) have the same cross-sectional shape which remains essentially the same over their respective lengths.

8. The workpiece carrier (1) according to any one of claims 4 to 7, characterized in that The first support element and the second support element (41, 42) have the same, preferably rectangular, cross-sectional shape which remains substantially the same over their respective lengths.

9. The workpiece carrier (1) according to any one of the preceding claims, characterized in that Accordingly, at least two, preferably a plurality of first support elements and / or second support elements (41, 42) are provided.

10. The workpiece carrier (1) according to any one of the preceding claims, characterized in that A corner connector (10) is provided at each corner of the workpiece carrier (1), the corner connectors being connected to two adjacent profile bodies (2, 21, 22) respectively, and in particular, the corner connectors (10) extend the second supporting surfaces (52) of the two adjacent profile bodies (2, 21, 22) in an aligned manner.

Images