DE10012958B4 - Device for lifting conveyed material, in particular workpiece carriers, from a conveyor track - Google Patents

Abstract

contraption (10, 100) for lifting conveyed goods, in particular workpiece carrier (12), from a conveyor track (14), consisting of two parallel juxtaposed conveyor lines (16,18) on which the conveyed goods rests, wherein the device (10, 100) at least one lifting device (20, 20a, 22, 22a) substantially between the two Conveyor lines (16, 18) is arranged, characterized in that the device (10, 100) has at least two lifting devices (20, 20a, 22, 22a) and that each lifting device (20, 20a, 22, 22a) as on both conveyor lines (16, 18) attachable kit is formed and to different lengths of the conveyed goods is customizable.

Description

The Invention is based on a device for lifting conveyed material, in particular workpiece carriers, from a conveyor belt according to the preamble of the main claim.

such Devices are for example on pages 33 to 36 of the catalog "transfer system TS4 "the Robert Bosch GmbH, Stuttgart, DE shown. The conveyor track consists of two parallel juxtaposed conveyor lines, on which workpiece carriers rest. The devices have two or more lifting devices, the are arranged substantially between the two conveyor lines.

each The device is designed as a kit for a specific workpiece carrier size. The Devices consist of an upper part, a lower part and a or more pneumatic cylinders. The tops of the devices are formed as a plate or as a welded frame. Besides, they are also the bases a frame, which is at the bottom of a manufacturing plant supported is. So that several pneumatic cylinders of a device at the same time each execute the same stroke, are they over? Synchronizers connected together.

By these measures the devices are each only for a certain workpiece carrier size with respect to Length and Width of the workpiece carrier used. Although this does not play at a constant size of the workpiece carrier Role. However, it sometimes happens that in certain applications workpiece carriers the same width could be better used with a different length. The means that for each pallet length one Device must be provided. This increases the number of different Devices, resulting in an increased Expense in the storage of the same leads. Alternatively, only certain lengths be provided, whereby, however, the variability decreases with respect to different workpiece carrier lengths.

The Synchronizers finally provide additional Components are and are mechanically very complex. This is with increased costs connected.

From the DE 22 56 018 C3 shows an arrangement for treating, in particular for etching objects. There are provided according to the modular principle as building blocks trained treatment stations. As a result, depending on the requirement, a different number of etching or rinsing components can be used.

In the DE 35 42 496 C2 discloses a device for supplying mounting parts, wherein using a variety of similar components a variety of movements on an intermediate transport path of mounting parts of a guideway to a dispensing position are possible. Specifically, housings of various components are similarly constructed.

In the DE 35 29 592 C2 a universal gripping mechanism for handling equipment is described, which is modular. For this purpose, a guide gear, ie a gripper jaw-resistant sliding-crank mechanism with a pair of arms and a jaw as a module replaceable arranged on a drive device.

task It is the object of the present invention to provide the generic device in such a way that with few devices the largest possible range at different sizes Covered workpiece carriers becomes. Solved This object is achieved by the features of the claim.

The inventive device for lifting off conveyed goods, in particular workpiece carriers, with the characterizing features of the main claim has the opposite Advantage that they can be used for workpiece carriers of different lengths with the same width is. As a result, a modular system can be achieved by the same with a few Modules many variants possible are. Furthermore, the device is simpler. The strokes of the lifting devices are still quite synchronous.

There both lifting devices are formed substantially the same, decreases the effort for the storage again. It is particularly favorable if each lifting device consists of a lower part and an upper part and each lower part from both conveyor lines will be carried.

Thereby, that connecting lines of the two lifting devices to at least are connected to a common valve and are the same length the strokes the lifting devices sufficiently synchronously. The must Lifting devices for mechanically independent operation do not have facilities to synchronize the strokes be connected to each other.

If the lower part and the upper part of the lifting devices form a cavity, the danger of pinching body parts during operation is reduced. For this purpose, it has proven to be advantageous if the lower part and the upper part each have a U-shaped cross-sectional area, wherein the Ba sis legs are arranged in parallel and the U-legs of the upper part engage around the U-legs of the lower part.

A easy attachment to the conveyor lines is given if, on the front sides of the lower parts of the lifting devices Fastening devices for fastening the lifting devices to the conveyor lines are arranged.

It may be advisable to use two rods between the lifting devices support of the conveyed goods to provide against bending, preferably close to each the conveyor lines are arranged. The rods can be easily cut to the required level and be attached to the lifting devices by simple means.

Becomes the device used to position the conveyed is on each device has a positioning pin for engaging in positioning holes of the conveyed goods intended. Ways to engage in the positioning holes provided Sections of the positioning pins at least two diametrically opposed Ball sections, this is the tolerance compensation, making the Orientation of the device on the conveyor track should not be so accurate got to. This concludes to the sections of the positioning pins with the ball sections in each case a section which has a smaller diameter as the diameter of the ball sections.

Becomes the device used for the transverse transport of the conveyed so has each lifting device a conveyor line on, of which at least one is driven.

Further Advantages and advantageous developments of the device according to the invention for lifting off conveyed goods, especially workpiece carriers, result from the dependent claims and the description.

Two embodiments The invention are illustrated in the drawing and in the following Description closer explained. Show it:

1 a top view of a device for lifting conveyed, which serves to position the conveyed,

2 a representation according to the section lines II-II of 1 .

3 a representation according to the section lines III-III of 1 .

4 a view of a device that serves the transverse transport of conveyed,

5 a plan view according to 4 and

6 a side view according to 4 ,

In the 1 is a device as a first embodiment 10 for lifting workpiece carriers 12 from a conveyor track 14 shown. Instead of the workpiece carrier 12 It may also be other conveyed or general cargo. However, it can also be workpieces themselves. As a rule, however, workpiece carriers become 12 used.

The workpiece carrier 12 consists in the present embodiment of a frame 12a and a plate disposed therein 12b , The workpiece carrier 12 lies with the frame 12a on the conveyor track 14 on. Not shown workpieces are - often in special shots - on the plate 12b arranged, which is a slightly larger distance to the conveyor track 14 has as the frame 12a ,

The conveyor track 14 consists of two conveyor sections arranged parallel to each other 16 . 18 on which the workpiece carriers 12 rest. As a means of transport of the conveyor lines 16 . 18 There are several options available. Like in the 2 shown on the left, it is at the conveyor line 16 around an accumulation roller chain. In the 2 right is the conveyor line 18 designed as a belt conveyor; This is called the conveyor belt 14 from a double belt conveyor. Furthermore, other known means of transport are also suitable. Depending on the application, it is also possible to combine different principles at least in sections.

The device 10 has two lifting devices 20 . 22 which is essentially between the two conveyor lines 16 . 18 are arranged. Every lifting device 20 . 22 is as at both conveyor lines 16 . 18 fastenable kit designed so that each lifting device 20 . 22 separated and independent of the other or a lifting device 20 . 22 after the other on the conveyor lines 16 . 18 can be attached. This allows the distance of the lifting devices 20 . 22 be varied and the device 10 on differently long workpiece carriers 12 be adjusted.

The lifting devices 20 . 22 are essentially the same. Every lifting device 20 . 22 has a lower part 24 and a top 26 on, with the lower part 24 from both conveyor lines 16 . 18 will be carried. The lower part 24 and the top 26 have a U-shaped cross-sectional area, with the base leg 28 of the lower part 24 and the base leg 30 of the top 26 are arranged parallel to each other and the U-legs 32 of the top 26 the U-thighs 34 of the lower part 24 embrace. This will form the lower part 24 and the top 26 a cavity that can not be accidentally seized, increasing safety against accidents. It is also possible that the lower part 24 and the top 26 have a different cross-sectional area. For example, the U-legs 34 of the lower part 24 omitted when the U-thighs 32 of the top 26 be extended accordingly. It is also possible to use two components with an L-shaped cross-sectional area, which are arranged corresponding to one another, so that these components likewise form a cavity.

For fastening the lifting devices 20 . 22 at the conveyor lines 16 . 18 are on the front sides of the bottoms 24 Fasteners in the form of angles 36 arranged. At each end of the lower part 24 is a thigh 38 of the angle 36 attached. In the present embodiment, the leg 38 welded. The thigh 38 of the angle 36 is also about fasteners 40 , which are in longitudinal grooves 42 the opposite longitudinal sides 44 the conveyor lines 16 . 18 are arranged on the conveyor track 14 attached. This is the angle 36 wider than the lifting device 20 trained and offset to the longitudinal center plane on the lower part 24 attached. This results in that ever an angle 36 left and an angle 36 is arranged to the right of the central longitudinal plane.

The other thigh 46 points from the lifting device 22 away and is about fasteners 40 like hammer bolts and nuts in longitudinal grooves 42 the bases 48 the two conveyor lines 16 . 18 attached, attached. Like from the 2 shows, is the conveyor line 18 not as high as the conveyor line 16 , which is why the level compensation still a spacer 50 between the thigh 46 and the bottom 48 the conveyor line 18 is arranged.

Every lifting device 20 . 22 has as a further component at least one known per se and pneumatic cylinder 52 on. However, other suitable lifting devices may be provided, such as hydraulic cylinders. If necessary, per lifting device 20 . 22 also two or more pneumatic cylinders 52 be provided. The cylinder housing 54 the pneumatic cylinder 52 are about screws 55 on the lower parts 24 the lifting devices 20 . 22 and the piston rods 56 at the tops 26 attached. In drilling 58 the cylinder housing 54 are each two guide rods 60 slidably mounted, at the tops 26 are fixed and through holes 62 the bottoms 26 protrude. To avoid accidents are on the undersides of the lower parts 24 attached and around the guide rods 60 arranged sockets 64 intended.

The connecting cables 66 the lifting devices 20 . 22 or the pneumatic cylinder 52 are connected to at least one common valve, not shown, and the same length. This is the hub of the two lifting devices 20 . 22 pretty much in sync. As a result, the lifting devices 20 . 22 for mechanically independent operation are not connected to each other via means for synchronizing the strokes, whereby their structure is simplified.

At the tops 26 are about screws 68 sleeve-shaped pads 70 attached. The terms 70 can be made of metal or plastic and carry the workpiece carriers 12 , In the present embodiment, the plates are 12b the workpiece carrier 12 on the pads 70 on.

The lifting device 20 has a positioning pin on a front area 72 in the form of a sword pin and the lifting device 22 in a forehead area a positioning pin 74 in the form of a ball head for engagement in positioning holes 78 the workpiece carrier 12 on. The positioning holes 78 are in the present embodiment in diagonally opposite corners of the frame 12a of the workpiece carrier 12 attached and each have a conical immersion section 79 for the positioning pins 72 . 74 ,

The positioning pin 72 the lifting device 22 has seen in the longitudinal direction substantially the cross-sectional area of a rhombus, the positioning pin 74 the lifting device 22 has a round cross-sectional area, with the dimensions of both positioning pins 72 . 74 change in the longitudinal direction. The positioning pins 72 . 74 do not have the whole in the positioning holes 78 penetrating length the same dimensions, as this is the device 10 can lead to workpiece carrier 12 that are not exactly perpendicular to the positioning pins 72 . 74 lie, could tilt. For engagement in the positioning holes 78 intended sections 80 . 82 the positioning pins 72 . 74 Therefore, at least two diametrically opposite spherical sections 84 . 86 on. To the sections 80 . 82 with the ball sections 84 . 86 closes preferably each a section 88 on, which has a smaller diameter than the diameter of the ball sections 84 . 86 ,

Between the lifting devices 20 . 22 can have two rods 90 to support the workpiece carriers 12 be provided against bending, preferably each close to the conveyor lines 16 . 18 are arranged. This improves the accessibility from below. The bars 90 also have conditions 70 on top of which the frames 12b the workpiece carrier 12 rest. The bars 90 are, for example, extruded aluminum parts with longitudinal grooves. That's what they can do be easily cut to the required level. The bars 90 are about in themselves known connectors 92 at the tops 26 attached.

Along the conveyor track 14 is after the device 10 still a facility 94 for stopping the workpiece carrier 12 intended. The device 94 can also be in front of the device in the conveying direction 10 to be ordered. At the device 94 For example, it is a singler known in and of itself. The device 94 is at the longitudinal groove 42 the long side 44 the conveyor line 16 attached.

On an outside of the conveyor track 14 is a known per se device for detecting the presence of a workpiece carrier 12 arranged. This is the accessibility of the workpiece carrier 12 improved from below.

This device can alternatively also in the device 94 be integrated.

Furthermore, at each lifting device 20 . 22 a well-known facility 96 for detecting the upper and / or lower stroke position of the respective lifting device 20 . 22 arranged. It may also be possible, only one device 96 to use. The facilities 96 For example, have an inductive, capacitive proximity switch or other switch 96a on, below the base 24 attached, and one at the top 26 attached part 96b for loading the switch 96a , The part 96b is each outside the device 10 at the tops 26 attached. This is the accessibility of the workpiece carrier 12 improved from below.

Along the conveyor track 14 is in front of the device 10 Furthermore, a known per se retrace barrier 98 for the workpiece carrier 12 intended. The return lock 98 is at the longitudinal groove 42 the long side 44 the conveyor line 18 attached.

In operation, the device is 10 usually in the area of a station, not shown, for machining, assembly, assembly, quality control, packaging, etc. of workpieces attached. Comes a workpiece carrier 12 with one or more workpieces on the device 10 on, he gets through the facility 94 stopped to stop. Through the return lock 98 the workpiece carrier remains 12 in position. Now the lifting devices 20 . 22 actuated. The positioning pins 72 . 74 enter the positioning holes 78 one. Here are the sections 80 . 82 first in the area of the immersion sections 79 , Because the immersion sections 79 tapered, can also be an inaccurately positioned workpiece carrier 12 be caught.

Through the ball sections 84 . 86 can the positioning pins 72 . 74 also in the positioning holes 78 penetrate, if not exactly with the longitudinal axis of the positioning pins 72 . 74 aligned. Thus, a tolerance compensation is possible. The lifting devices 20 . 22 do not have to be positioned as accurately to each other as it would be without the ball sections 84 . 86 would be required. The positioning pins 72 . 74 are insofar also in devices for lifting of conveyed, especially workpiece carriers 12 , from a conveyor track 14 , consisting of two parallel conveyor sections 16 . 18 exists, on which the conveyed rests, wherein the device 10 is designed as a kit. The previously through the device 94 To stop only rough positioned workpiece carriers 12 is now finely positioned. Because the plate 12b in contrast to the frame 12a always a greater distance to the conveyor track 14 has, it comes only during or after the fine positioning with the pads 70 in contact, through which then the workpiece carrier 12 will be carried. Subsequently, the process provided at the station can be carried out. At the end of this process, the lifting devices go 20 . 22 again. The workpiece carrier 12 will be back on the conveyor belt 14 set. Finally, the device gives 94 the transport of the workpiece carrier 12 free.

In the 4 to 6 is a second embodiment of a device according to the invention 100 shown. The device 100 serves for the cross transport of workpiece carriers 12 from the conveyor belt 14 on a transversely arranged conveyor track 102 that are similar or equal to the conveyor track 14 can be constructed. Every lifting device 20a . 22a the device 100 also has a lower part 24 , a shell 26 , at least one lifting device and fastening devices for attachment to the conveyor lines 16 . 18 on. On the lifting devices 20a . 22a is an active or passive funding area 104 . 106 educated. The passive conveying area 104 has no drive, the active conveyor section 106 is powered.

At the lifting device 22a is an active funding area 106 similar to that provided by conveyors with straps or bumpers. This is in place of the requirements 70 and the positioning pin 72 A carrier 108 arranged, one of its U-legs 108a for example by means of screws 109 on the top 26 is attached. At the frontal areas of the wearer 108 are recesses for pulleys 110 for a belt 111 provided, one of which is laterally attached to the base leg 108b of the carrier 108 flanged electric motor 112 is driven. On the outside of the second U-leg 108c the belt is running 111 in the direction in which the workpiece carrier 12 is transported, between the U-thighs 108a . 108c in the other direction.

Alternatively, on the lifting device 22a For example, ball rollers may be provided in the outer areas of the tops 26 are attached. Furthermore, for driving the workpiece carrier 12 in the middle of the top 26 one of the electric motor 112 driven roller, which is the workpiece carrier 12 drives.

At the lifting device 20a is a passive funding area 104 a cassette 114 with rollers 116 intended. Is enough the drive of the electric motor 110 the lifting device 22a not for the transverse transport of a workpiece carrier 12 out, can at the lifting device 20a also an active funding area 106 be provided.

If the workpiece carriers 12 at the device 100 can bend too much, also three or more lifting devices 20a . 22a with funding areas 104 . 106 be provided.

The operation of the device 100 when lifting a workpiece carrier 12 is similar to the device 10 , Once a workpiece carrier 12 he is lifted by means of the conveyor area 106 across the conveyor track 14 on the conveyor belt 102 transported. As soon as the workpiece carrier 12 far enough on the conveyor track 102 is, he will be transported by this. The device 100 can go back to their original position.

Essential in the inventive devices 10 . 100 is that every lifting device 20 . 22 . 20a . 22a as at both conveyor lines 16 . 18 fastenable kit, is formed, which contains all components required for operation and separately on the conveyor lines 16 . 18 can be mounted.

Claims (12)

Contraption ( 10 . 100 ) for lifting conveyed material, in particular workpiece carrier ( 12 ), from a conveyor track ( 14 ), which consists of two parallel conveyor sections ( 16 . 18 ), on which the conveyed material rests, wherein the device ( 10 . 100 ) at least one lifting device ( 20 . 20a . 22 . 22a ) substantially between the two conveyor lines ( 16 . 18 ), characterized in that the device ( 10 . 100 ) at least two lifting devices ( 20 . 20a . 22 . 22a ) and that each lifting device ( 20 . 20a . 22 . 22a ) than at both conveyor lines ( 16 . 18 ) fastenable kit is formed and is adaptable to different lengths of the conveyed. Contraption ( 10 . 100 ) according to claim 1, characterized in that both lifting devices ( 20 . 20a . 22 . 22a ) are formed substantially the same. Contraption ( 10 . 100 ) according to claim 1 or 2, characterized in that each lifting device ( 20 . 20a . 22 . 22a ) a lower part ( 24 ) and a top ( 26 ) and that each lower part ( 24 ) of both conveyor lines ( 16 . 18 ) will be carried. Contraption ( 10 . 100 ) according to one of claims 1 to 3, characterized in that connection lines ( 66 ) of lifting devices ( 52 ) of the two lifting devices ( 20 . 20a . 22 . 22a ) are connected to at least one common valve and are the same length. Contraption ( 10 . 100 ) according to one of claims 1 to 4, characterized in that the lifting devices ( 20 . 20a . 22 . 22a ) for mechanically independent operation are not connected to each other via means for synchronizing the strokes. Contraption ( 10 . 100 ) according to one of claims 3 to 5, characterized in that the lower part ( 24 ) and the top ( 28 ) form a cavity. Contraption ( 10 . 100 ) according to one of claims 3 to 6, characterized in that the lower part ( 24 ) and the top ( 26 ) have a U-shaped cross-sectional area, wherein the base legs ( 28 . 30 ) are arranged in parallel and the U-legs ( 32 ) of the upper part ( 26 ) the U-legs ( 34 ) of the lower part ( 24 ) embrace. Contraption ( 10 . 100 ) according to one of claims 3 to 7, characterized in that on the end faces of the lower parts ( 24 ) of the lifting devices ( 20 . 20a . 22 . 22a ) preferably as angle ( 36 ) formed fasteners for fastening the lifting devices ( 20 . 20a . 22 . 22a ) at the conveyor lines ( 16 . 18 ) are arranged. Contraption ( 10 . 100 ) according to one of claims 1 to 8, characterized in that a device ( 94 ) for stopping the conveyed goods, at least one, preferably two devices ( 96 ) for detecting the upper and / or lower stroke position of the respective lifting device ( 20 . 22 . 20a . 22a ) and a backstop ( 98 ) and that the facilities ( 94 . 96 ) and the backstop ( 98 ) along the conveyor track ( 14 ) before and after the device ( 10 . 100 ) are arranged. Contraption ( 10 . 100 ) according to one of claims 1 to 9, characterized in that between the lifting devices ( 20 . 20a . 22 . 22a ) two bars ( 90 ) are provided to support the conveyance against deflection, each close to the conveyor lines ( 16 . 19 ) are arranged. Contraption ( 10 ) according to one of claims 1 to 10, characterized in that at each lifting device ( 20 . 22 ) each one positioning pin ( 72 . 74 ) for engaging in positioning holes ( 78 ) of the conveyed material and that for engagement in the positioning bores ( 78 ) ( 80 . 82 ) of the positioning pins ( 72 . 74 ) at least two diametrically opposite ball sections ( 84 . 86 ) and that preferably to the sections ( 80 . 82 ) with the ball sections ( 84 . 86 ) one section each ( 88 ), which has a smaller diameter than the diameter of the ball sections ( 84 . 86 ). Contraption ( 100 ) according to one of claims 1 to 9, characterized in that on each lifting device ( 20a . 22a ) a funding area ( 104 . 106 ) is designed for the transverse transport of the conveyed, wherein at least one conveying area ( 106 ) is driven.