DE8616377U1 - Device for producing a spacer frame for insulating glass - Google Patents

Description

Description:

The invention is based on a device for producing a spacer frame for insulating glass with the features specified in the preamble of claim 1 or in the preamble of claim 6. Such a device is known from DE-PS 32 23 881.

The known device has a plate inclined by 10° to 15°, on the upper edge of which two bending tools that can be moved along this edge and a holder for the hollow profile bar to be bent are provided. The holder is located between the bending tools and includes a number of support brackets on which the hollow profile bar can be placed and a pair of clamping jaws for securing the hollow profile bar.

The bending tools essentially consist of an abutment that guides and supports the hollow profile bar and a pressure roller that works with it and is operated by a toggle lever arrangement, which acts on the hollow profile bar and bends it around a bending edge of the abutment. The pivot axis of the pressure roller runs at right angles to the plate, the top of which coincides with the bending plane; during the bending process, the bent legs slide over the plate that supports them.

The two bending tools are used simultaneously: First, the hollow profile strip is formed into a U by simultaneously bending at two bending points,

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and then the hollow profile strip is bent twice more to form a rectangular frame, with the third and fourth bending points being between the first and second bending points. Accordingly, the two bending tools are moved towards each other between the two double bending processes.

After all four corners of the spacer frame have been bent, the free ends of the hollow profile strips touch each other, but are still unconnected. After the bending process has been completed, the half-finished spacer frame is lifted out of the bending tools and the holder located between them by a mechanical ejector and slides down along the plate. There it is picked up by hand and closed by inserting a rod-shaped connecting element into the two free ends of the hollow profile strips and then put to further use.

The disadvantage of the known device is that it only allows the bending processes to be carried out automatically, but the closing of the frame must be done manually or can only be done after it has been transferred by hand to a separate closing device, but in any case it takes place outside the bending device. Another disadvantage is that the two free ends of the bent but not yet closed spacer frame spring back elastically after the bending tools are released, so that the two frame legs on which the free ends of the hollow profile strip are located can no longer

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are not aligned, but form an angle with each other. This means that after the spacer frame is closed, there is a constant tension in it. In addition, the angled position that the free ends of the hollow profile bar assume after the bending tools are released, is a very unfavorable condition for the desired automatic closing of the spacer frame.

The invention is based on the object of specifying a device which is particularly suitable for automatically bending and closing spacer frames and which largely makes manual activities superfluous.

This object is achieved by a device having the features specified in claim 1. Advantageous further developments of the invention are the subject of the subclaims.

The device according to the invention has a horizontally or inclined support wall, which can be formed by one or more plates. The plates can have recesses. At the edge of the support wall there is a holder for the hollow profile bars to be bent. This holder can be a support strip or a series of support fingers, to which the hollow profile bars are placed individually by hand or by a mechanical insertion device before bending. The holder also expediently comprises an end stop that can be moved along the holder for positioning the hollow profile bars in their

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Longitudinal direction as well as a clamping device for clamping the hollow profile bars positioned in this way.

The supporting wall serves to support the hollow profile bars during the bending process. The bending tools are therefore arranged relative to the supporting wall in such a way that the bending plane (that is the plane in which the bent legs of the hollow profile bar move during the bending process) coincides with the top of the supporting wall. If the supporting wall is arranged at an angle, the holder for the hollow profile bars is preferably arranged along its lower edge. In principle, the holder could also be arranged elsewhere, in particular along the upper edge of the supporting wall, as shown in FIG.

I of DE-PS 32 23 881; the arrangement of the holder along the lower edge of the supporting wall, however, facilitates automatic removal of the spacer frames from the device (further development of the invention according to claim 11).

, When working with the new device, the two ends of the hollow profile bar are guided into a position in which they lie sideways next to each other by deflecting one or both ends out of the bending plane, ideally during the last bending process. This makes it possible to overbend the hollow profile bar at the intended bending points to compensate for elastic springback of the bent hollow profile bar by such an amount that all four corner angles of the spacer frame are exactly 90° after the elastic springback, without the

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both free ends of the spacer frame would therefore meet during the last bending process and when springing back. If the two ends of the hollow profile bar were only guided in the bending plane during the bending process, as is usual, they would meet and possibly deform in an undesirable way. Creating a lateral offset of the ends of the hollow profile bar is particularly advantageous if a connector is already inserted into one of the two ends of the hollow profile bar right from the start of the bending process, with which the fully bent spacer frame is finally closed by inserting the still protruding end of the connector into the opposite end of the hollow profile bar: Due to the protruding connector, it would not be possible to bend the hollow profile bar by a full 90° during the last bending process, let alone to overbend it beyond 90°, without a lateral offset.

However, due to the intended lateral offset of the two ends of the hollow profile bar, it is possible to overbend it without any problems even if a connector is already inserted into one of its ends. When the bending tools are released from the hollow profile bar after the bending process has been completed, its two ends remain lying side by side and are thus in an ideal starting position in which they can be gripped by machine, positioned opposite each other in alignment, and then connected to one another. Connecting

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can be done by soldering, welding or inserting a connector, whereby the latter variant is preferred. The connector could be inserted after the bending process has been completed, but preferably it is inserted into one of the two ends of the hollow profile rod before the bending process begins and then into the opposite end after the bending process has been completed. With this workflow, the mechanical handling required for automation is particularly easy to implement.

Since the lateral offset of the two ends of the hollow profile bar is only required at the end of the last bending process, it is preferably only created in the last phase of the last bending process. In this way, even when spacer frames of different sizes follow one another, it is easiest to achieve a consistently large lateral offset, and in the phases of the bending process preceding the deflection of one end, a lateral guide can be implemented in the bending plane for the relatively unstable hollow profile bars by means of a supporting wall that coincides with the bending plane, which prevents undesirable fluttering of the hollow profile bars during the bending processes.

The device has at least one, preferably two bending tools. With only one bending tool, the four corners of the spacer frame are bent one after the other and the bending tool must

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* for this purpose along the holder of the hollow profile bar

or the hollow profile bar, for example by means of the

' already mentioned stop can be moved longitudinally in order to

the bending tool to be able to approach the intended bending points of the hollow profile bar. If two bending tools are preferred, they are best left to work simultaneously by first bending the hollow profile bar twice to form a U, then bringing the two bending tools closer together (at least one of them must be arranged so that it can be moved).

. must be, but preferably both along the bracket

are movable) and then the hollow profile strip is bent twice more to form a rectangular spacer frame, which then has to be closed by connecting its two ends.

To close the frame, according to the invention, a parallel... to the supporting wall is displaceable and thus adjustable in its distance

A frame closing tool is provided which can be changed by the holder and the bending tools and which has means for deflecting one end of the hollow profile bar out of the bending plane while the two ends of the hollow profile bar approach each other.

| profile bar to each other. By deflecting the

At one end, the hollow profile bar can be bent to compensate for the j 25 elastic springback so that the

Both free legs of the finished bent spacer frame should lie parallel to each other after the bending tools have been removed.

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Because the means for deflecting the hollow profile bar end are arranged on the frame closing tool, the hollow profile bar end in question is only deflected in the last phase of the final bending process that affects it, so that the supporting wall provided for guiding and supporting the frame legs pivoted during bending can also perform its supporting and guiding function. In order to adapt to spacer frames of different sizes, the distance of the frame closing tool from the holder provided for the hollow profile bars on the supporting wall can be changed by moving the frame closing tool parallel to the supporting wall; the movement is expediently carried out at right angles to the holder mentioned or to the edge of the supporting wall on which this holder is located. If two bending tools are provided, their connecting line runs at right angles to the path of movement of the frame closing tool, with the two bending tools being on different sides of the path of movement of the frame closing tool, preferably maintaining the same distance from one another.

The frame closing tool is moved to the appropriate spacing position before or during the bending of a spacer frame. After the bending process has been completed, the two legs of the spacer frame to be connected lie with the intended side set in a common,

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to hold the hollow profile bars parallel to the plane. In this plane, the frame closing tool ideally has one or more stops against which the frame legs to be connected rest with the inside of the frame after the bending process has been completed (the inside of the frame is understood to be the side that faces the inside of the bent frame). These stops are a means of positioning the ends of the hollow profile bar, which takes place before these ends are connected to one another. The overbending made possible by the lateral offset of the two ends of the hollow profile bar means that the two frame legs to be connected usually do not lift off their stop again after the bending tools have been released; nevertheless, it is recommended to provide hold-down devices on the closing tool, in particular hold-down rollers, which can be pivoted against the stop(s) from an ineffective end position behind the bending plane and press the two frame legs to be connected against their stop during the further positioning steps.

To deflect a hollow profile bar end out of the bending plane, the frame closing tool preferably has a deflector that can be retracted behind the bending plane and has a sliding surface on which the relevant frame leg slides during the bending process; the sliding surface is oriented at an angle to the bending plane in such a way that it deflects the sliding frame leg

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I thigh in the course of its sliding movement from the

&bull;i retaining wall lifts off and thus out of the bending plane

I. The other free end of the hollow profile bar

I does not require any deflection, rather it should be deflected by the retaining wall during I 5 the entire bending process.

I is supported and guided. However, since random I steering when bending cannot be excluded, I for the second end of the hollow profile bar at the locking

&iacgr; tool preferably a guide with a sliding

I 10 surface is provided on which the relevant frame shank slides during the bending process;

I the sliding surface of the guide is inclined in such a way I oriented towards the bending area so that it can slide

I Frame leg against the retaining wall. The entry

15 The guide bar and the deflector as well as the stops on the frame closing tool which limit the pivoting movement of the free frame legs together force a predetermined position of the two ends of the hollow profile bar at the end of the bending processes.
20

For further positioning of the ends of the hollow profile bar, the closing tool is equipped with a positioning device which moves the ends of the hollow profile bar into a position in which they lie flush against each other. For this purpose, two end stops with variable spacing are preferably provided on the closing tool for the two ends of the hollow profile bar.

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It is best to form the two end stops on the guide and on or next to the deflector, in such a way that the two end stops face each other and the end stop for the first end of the hollow profile bar is formed on each end next to the deflector for the second end and the end stop for the second end on the guide for the first end of the hollow profile bar. By operating the two distance-adjustable end stops, the not yet closed spacer frame can be spread, whereby the preferably provided hold-down rollers prevent the two ends from pivoting. The two ends of the not yet closed spacer frame are spread until they no longer overlap; If the spacer frame is closed by a connector, which is preferably inserted into one of the ends of the hollow profile bar before the bending process begins, then the spacer frame must be spread so wide that there is no longer any overlap even with the inserted connector. The two ends are now in a position in which they can be moved sideways into a position in which they are flush with each other. To make this possible, the deflector can be moved back into an ineffective position behind the bending plane; the deflection of one end of the hollow profile bar forced during bending can no longer be reversed. For this purpose, a plunger could be used

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be provided. Preferably, however, this is done by closing a gripper which has a first clamping jaw that coincides with the bending plane and a second clamping jaw that can be moved from the front against the bending plane, which presses the frame leg, which has been deflected out of the bending plane until then, against the first clamping jaw and clamps it. For the opposite end of the hollow profile bar, another gripper is provided, which also has a first clamping jaw, the clamping surface of which

coincides with the bending plane, and a second &

Has clamping jaws that can be moved from a position in front of the supporting wall against the first clamping jaw. Preferably, the movable clamping jaw is arranged behind the guide when looking from the closing tool against the edge of the supporting wall where the bending tools are located, so that the guide guides the relevant frame leg into the gripper. The movable clamping jaw can be, for example, the guide itself, which is movable and designed with a corresponding clamping surface parallel to the supporting wall.

Once the two grippers have firmly grasped the two free frame legs, they are moved towards each other, whereby if connectors are used, the part of the connector protruding from one end of the hollow profile bar is inserted into the other end of the hollow profile bar. To fix the connector in the hollow profile bar, the latter is conveniently notched over a recess provided in the connector.

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For this purpose, a notching tool is provided on the closing tool, preferably between the grippers, which can be pivoted from an ineffective end position behind the bending plane against the hollow profile bar held by the grippers.

If it is intended to connect the hollow profile bar ends by soldering or welding, the two grippers are moved towards each other until the two hollow profile bar ends touch each other and then a welding or soldering tool is brought forward, e.g. by swiveling it from an inoperative position behind the bending plane to a working position in front of the bending plane.

The finished spacer frame can be removed from the device after opening the two grippers and after swinging up the preferably provided hold-down rollers. Removal could be done by hand. However, removal is preferably done by machine; the frame closing tool according to the invention has the advantage that it can be designed without great effort as a transfer tool for transferring the spacer frame to a conveyor, which conveys the spacer frame out of the device.

The necessary further development of the inventive

The device is expediently carried out on an embodiment in which the supporting wall is inclined, in particular

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special only a few degrees inclined against the vertical j is arranged and the holder for the respective

j hollow profile bar to be bent and the bending tools on the

; lower edge of the retaining wall. In such a

' 5 Device, the conveyor is best placed on the opposite, i.e. upper, edge of the retaining wall and

forms it as an overhead conveyor, which conveys the spacer frames hanging. Since the closing tool can be moved up and down to change its distance from the lower edge of the retaining wall, one must

just make the movement path of the closing tool long enough that it can be moved into the area of influence of the overhead conveyor, where the transfer of the spacer frames to the overhead conveyor takes place in a predetermined end position of the closing tool. In principle, the closing tool could be arranged in front of the supporting wall, but preferably the movement path of the closing tool runs in a section of the supporting wall that runs from bottom to top, so that the closing tool only partially extends into the area in front of the supporting wall, which makes it easier to transport the spacer frames away unhindered. It is best if the movement \ path of the locking tool is not fixed in place,

25 but is designed to be movable so that it and with it the closing tool can be displaced behind the bending plane.

This makes it possible to transport the spacer frames completely unhindered after being transferred to the overhead conveyor.

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not only across its own plane, but even in its plane (parallel to the supporting wall), which is particularly advantageous because then access from the front to the device as a whole and to the bending tools in particular is possible at any time without hindrance.

The overhead conveyor has hooks as a support element for the spacer frames, into which the spacer frames are hung. To make hanging the spacer frames particularly easy, the hooks are preferably suspended with their tips directly in front of the level. The advantage of such hooks is that they are deflected by the upper leg of the spacer frame as it moves up with the closing tool and then swing automatically under the upper frame leg. The frame closing tool can then be lowered, placing the spacer frame on the hook.

) 20 A preferred embodiment of the invention is shown schematically in the accompanying drawings.

Figure 1 shows the device in front view, Figure 2 shows the device in side view A according to arrow II in Fig. 1, Figure 3 shows the device in plan view,

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figure

shows as a detail the frame closing tool of the device in an oblique view,

figure

Figure 6

figure

shows a plan view of the front part of the frame closing tool with the panel removed, at a time when the bending process for producing a spacer frame has been completed,

shows a top view of the frame closing tool as in Fig. 5, but with the spacer frame already spread,

shows a top view of the frame closing tool as in Fig. 5, but with the spacer frame already closed,

Figure 8 shows a detail from the frame closing tool the arrangement and effect of a notching tool, and

figure

shows in detail the design and arrangement of pendulum-suspended hooks of an overhead conveyor at the upper edge of the device.

The device has a base frame 1 and on the back of the base frame a centrally arranged column 2 which is rigidly connected to the column. The base frame 1 carries a

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A support wall 3 formed by plates is arranged at a slight incline to the vertical and defines the bending plane 5 of the device with its front side. A holder 4 with a support surface 6 running at right angles to the bending plane 5 is provided along the lower horizontal edge of the plate 3. The holder 4 serves to hold hollow profile bars 7 that are to be bent into spacer frames, and to guide the hollow profile bars to two bending tools 8 and 9, which are arranged horizontally along the lower edge of the plates 3 and are mounted on two slides 10 for this purpose. The type and structure of the bending tools are not the subject of the present invention, but rather state of the art and are therefore not shown in detail. Bending tools such as those described in DE-PS 32 23 881 can be used, for example. In the example shown, two bending beams 11 are shown, which can be swiveled upwards by slightly more than 90° from a horizontal starting position around axes 12 running at right angles to the bending plane 5, thereby bending a hollow profile bar lying on the holder 4. To prevent it from slipping in its longitudinal direction, the hollow profile bar can be additionally clamped in the middle between the bending tools 8 and 9, e.g. by means of a clamping jaw working against the holder 4 from above, which is not shown in the drawing. The swivel angle of the bending beams 11 is slightly more than 90°, in order to prevent the hollow profile bars from being overbent.

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to compensate for their elastic rebound.

The two plates 3 are arranged next to each other at some distance. In the cutout 13 of the support wall formed from bottom to top, two parallel guide rails 14 are arranged, which run behind the bending plane 5 parallel to it from bottom to bottom. A closing tool 15 is mounted on these guide rails 14 so that it can move up and down. When bending a spacer frame, the measuring tool is moved to such a height that the two free legs 17 and 18 of the spacer frame to be connected to one another swing into the closing tool 15 with their ends 19 and 20 respectively. The two bending tools 8 and 9 are therefore arranged on both sides of the cutout 13 for the closing tool 15; the bending tools 8, 9 are preferably arranged and designed mirror-symmetrically to the vertical center plane 21 of the closing tool 15. This then leads to the bending points being symmetrical to the center of the hollow profile bar 7 and the two free legs 17 and 18 that swing into the closing tool 15 being of equal length.

The two bending tools 8 and 9 conveniently work simultaneously, as explained in the general description section.

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The frame closing tool 15 consists essentially of tools for positioning, gripping and connecting the two free legs 17 and 18 of a hollow profile bar and the associated actuating devices, which are housed in a housing 22 which has a front section 23. (Fig. 4). In the flat, front housing wall 24, above the front section 23, cutouts 25 and 26 are provided through which various machine elements can be led out of the housing 22 and moved back again.

On the front section 23, two stops 27 and 27a are provided with a stop surface running at right angles to the bending plane 5 and parallel to the holder 4, spaced apart from one another. The stop surfaces of the two stops 27 and 27a are aligned with one another. Above the stop 27 , a guide 28 is provided with a flat sliding surface 29 which faces the bending plane 5 and forms an acute angle oc with it, the distance between the guide 28 and the bending plane 5 increasing from bottom to top. Above the stop 27a, a deflector 31 is provided which also has a flat sliding surface 32, which, however, in contrast to the sliding surface 29 of the guide, faces away from the bending plane 5.

The sliding surface 32 runs in its effective position shown in Fig. 4 at an acute angle β to the bending plane 5, whereby the angle /d opens from top to bottom in contrast to the angle OC . Preferably - as shown - the sliding movement 32 is also extended by an angle running at a right angle to the bending plane 5.

, and these intersecting in a horizontal line

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The deflector 31 is inclined at an angle y measured in the plane; the acute angle &ggr; opens in the direction of the deflector 28. The inclined sliding surface 32 intersects the bending plane 5. From the effective position shown in Fig. 4 and Fig. 5, the deflector 31 can be brought (swiveled) into the housing 22 by means of a pneumatic cylinder 33 arranged in the housing 22.

In front of the side of the guide 28 adjacent to the deflector 31, a vertical stop surface 34 is formed, running at right angles to the bending plane 5, and immediately in front of the opposite side of the deflector 31, a further stop 35 is provided with a stop surface parallel to the stop surface 34. The stop 35 can be seen in Fig. 5, in Fig. 4 it is hidden.

Close to the deflector 31, a free-running roller 36 is provided, which is pivotably mounted about a horizontal axis 38 by means of a pneumatic cylinder 37 and can be pivoted out of an inactive position in the housing 22 through the cutout 25. The roller 36 serves as a hold-down device, which can press the one free leg 18 of a spacer frame against the stop 27a, but displacement movements in the longitudinal direction of the leg 18 are still easily possible due to the free-running roller 36. Another roller 39 serving as a hold-down device is close to the deflector

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28 is provided. The roller 39 can also be pivoted about a horizontal axis 41 from an inoperative position in the housing 22 by means of a pneumatic cylinder 40. It serves to press the other free leg 17 of the spacer frame onto the stop 27.

The two stops 27 and 27a are part of two clamping slides 42 and 43 that are parallel to one another and can be moved horizontally in the housing 22 by pneumatic cylinders 85 and 86, respectively. The clamping slide 42 has a clamping jaw 44 arranged under the guide 28 on its part that projects into the front section 23 and forms the stop 27. The clamping slide 42 with the clamping jaw 44 can be moved closer to the front housing wall 24 and away from it again by means of a pneumatic cylinder 46 that engages a frame part 45 of the closing tool 15. The clamping jaw 44, which can be moved perpendicularly to the bending plane 5 in this way, works together with a clamping jaw 47 that is opposite it and is fixedly arranged in the housing 22. In the clamping carriage 42, in a slot 48, there is a guide rod 49 extending perpendicularly to the bending plane 5, which is guided through a sliding bearing in the fixed jaw 47 and thus ensures parallel guidance of the movable clamping jaw 44 relative to the fixed clamping jaw 47. The clamping surface of the fixed clamping jaw 47 is in line with the bending plane 5 when the closing tool 15 is in the working position. The front housing wall 24 of the closing tool is also in line with the bending plane 5 or slightly behind it.

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In a corresponding manner, a clamping jaw 50 is formed on the part of the inner clamping slide 43 that protrudes from the housing 22 and forms the stop 27a, which can be moved closer to and away from the front housing wall 24 together with the clamping slide 43 by actuating a pneumatic cylinder 52 that engages a frame part 51 of the closing tool. The clamping jaw 50, which can be moved perpendicularly to the bending plane 5 in this way, works together with a clamping jaw 53 arranged in the area of the front housing wall 24 behind the deflector 31, the clamping surface of which always lies in the bending plane 5 and which is accessible after the deflector 31 has been pivoted into the housing 22 by actuating its pneumatic cylinder 33. The slide 43 also has an elongated hole 54 and in this a guide rod 55 running perpendicular to the bending plane 5, which is guided in a sliding bearing formed on the fixed clamping jaw 53.

Above the clamping surface of the movable clamping jaw 50, which is parallel to the bending plane 5, there is also an inclined surface 57, which faces the bending plane 5 in the same way as the sliding surface 29 of the guide and also serves as a guide; however, it is set steeper than the sliding surface 29.

Between the two clamping slides 42 and 43, a notching tool 60 is provided, which for reasons of

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For clarity, this is not shown in Figures 5, 6 and 7, but only as a detail in Fig. 8. The notching tool 60 is located at the tip of a pivot lever 61, the pivot axis 62 of which is located at the end of a guide rod 63 running perpendicular to the bending plane 5, which is guided in a guide block 64 and, as a result of a connection to the clamping carriage 42 (not shown in more detail), is always moved along with the movable clamping jaw 44, but only by half of its displacement path, which ensures that when bending hollow profile bars 7 with varying widths, the notching tool is automatically fed to the center of the hollow profile bar 7. The pivoting of the lever 61 is carried out by means of a pneumatic cylinder 65 via a further guide rod 66 guided in the same guide block 64, which is connected to the pivotable lever 61 via a link 67.

To transport the spacer frames 16 away, an overhead conveyor 69 is mounted along the upper edge of the two plates 3. The overhead conveyor consists of a horizontal frame 70, which is arranged along the upper edge of the plates 3, rests on it and on the central column 2 and projects beyond the outer end of one of the two plates 3. A guide rail 71 is formed on the frame 70, which supports an endless roller chain 72, which is connected via gear wheels 77 to 82 with a vertical

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Axle is deflected and tensioned. One of these gears, for example gear 82, is driven. Bearing blocks 73, in particular those made of plastic, are placed at regular intervals on chain bolts which are extended beyond the upper chain links. In each of these bearing blocks a hook 75 is suspended in a pendulum manner, with the pendulum axis 74 oriented horizontally in the direction of travel of the chain 72. The hooks 75 are suspended in the hoist so that they rest with their tips 76 on the plates in the front chain hoist.

3 and slide along it. |

j The device works as follows: A

4 at the lower edge of the plates 3 and there

The preferably clamped hollow profile bar 7 is first bent by 90° at two outer bending points by the two bending tools 8 and 9 and thus formed into a U. The two bending tools 8 and 9 are then moved towards each other and the hollow profile bar 7 is then bent again by 90° at the two inner bending points. When bending the last two corners, which preferably takes place simultaneously, the two legs 17 and 18 of the spacer frame 16 to be connected swing with their ends 19 and 20 into the area of influence of the closing tool 15, which has previously been moved to the appropriate height. One leg is guided by the guide 28 close to the bending plane 5, which coincides with the front of the plates 3, provided that it is not already resting against the support wall formed by the plates. The front housing wall of the closing tool lies on the front of the clamping tool during the entire bending process.

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Process in line with bending plane 5 or slightly behind it.

The other free leg 18 of the spacer frame, however, slides onto the deflector 31 and is thereby removed from the front of the support wall 3 at the end of the bending process. This ensures that the two free ends 19 and 20 do not meet at the end of the bending process, especially if a connector 58 is already inserted into one of the two ends 19. Figure 5 shows a typical arrangement of the two ends 19 and 20 at the end of the bending process. In this position, the two legs 17 and 18 are pressed against the two stops 27a and 27 by the hold-down rollers 36 and 39.

Now the clamping carriage 42 is moved towards the clamping carriage 43 and the clamping carriage 43 is simultaneously moved towards the clamping carriage 42. The guide 27 acts with the stop surface formed on it on the end 20 and the stop 35 attached to the clamping carriage 43, initially located next to the deflector 31, acts on the end of the connector 58, whereby the spacer frame 16 is spread until its end 20 and the connector 58 no longer overlap. This position is shown in Fig. 6. At the same time or subsequently, by actuating the

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The deflector 31 is pivoted into the housing 22 by means of the pneumatic cylinder 33. The path is now clear to bring the leg 18 of the spacer frame into alignment with the other leg 17. This is done by closing the gripper formed by the clamping jaws 50 and 53 by actuating the pneumatic cylinder 52. At the same time, the gripper formed by the clamping jaws 44 and 47 is closed by actuating the pneumatic cylinder 46 and clamps the leg 17. The two legs 17 and 18 are now aligned opposite one another. Now, by bringing the two clamping slides 42 and 43 closer together, the still protruding end of the connector 58 can be inserted into one end 20 of the hollow profile bar and the spacer frame can be closed in this way. In principle, it does not matter whether only one clamping slide or both clamping slides 42 and 43 are moved. Preferably, only one clamping slide is moved, for example the clamping slide 43, whereby its displacement path is expediently chosen to be somewhat larger than the insertion length of the connector 58, so that the connector is safely inserted up to the stop, which is usually provided in its middle. The displacement path of the clamping slide 43 that exceeds the insertion length manifests itself in a slip, which is expediently made possible by making the clamping surfaces of the clamping jaws 50 and 53 sufficiently smooth. In the other two clamping

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However, slippage is not desired in jaws 44 and 47; it is best avoided by corrugating the clamping surfaces. After the two legs 19 and 20 have been put together, the spacer frame 16 has the position shown in Fig. 7. In this position, the notching tool 60 is pivoted onto the top of the spacer frame by actuating the pneumatic cylinder 65, pressing it in on both sides of the gap 59 formed between the two ends 19 and 20. To make this possible, the connector 58 has a corresponding recess at this point.

As soon as the bending tools 8 and 9 have released the fully bent, but not yet closed spacer frame 16, and as soon as the hold-down rollers 36 and 39 press the legs 17 and 18 against the stops 27 and 27a, the closing tool 15 can begin to move upwards along the guide rails 14. The processes of positioning and closing the spacer frame can take place during this movement. Shortly before the closing tool 15 reaches its intended upper end position, the spacer frame 16 hits the inclined surfaces 76a of the hooks 75 of the overhead conveyor with its upper side. The hooks 75 automatically give way to the upwardly moving spacer frame 16 and fall when

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it has moved past the tip 76 of the hooks, again against the support wall formed by the plates 3. Now the hold-downs 36 and 38 can lift off the assembled spacer frame 16 and swing back into the housing 22. At the same time, the clamping jaws 44 and 47 as well as 50 and 53 can open and release the spacer frame 16. The spacer frame is transferred to the overhead conveyor 69 by the closing tool 15 being moved downwards a little, whereby the hooks 75 lift the spacer frame 16 out of the area of influence of the closing tool. By actuating a pressure cylinder 83 acting on the guide rails 14 in the upper area, the two guide rails 14 are now pivoted backwards about a lower horizontal axis 84 so far that the front section 23 of the closing tool disappears completely behind the bending plane 5. The spacer frame 16 can now be conveyed away in a direction parallel to the bending plane 5 without being hindered by the closing tool 15. As soon as the spacer frame 'r6 has moved out of the area of the closing tool, it can be pivoted forwards again into its working position and into the position for the next one to be produced.

Spacer frame can be moved to the appropriate height.

Claims (1)

DR. RUDOLF BAUER · DIPL.-SNGV HELMUT HUBBUCH DIPL.-PHYS. ULRICH TWELMEIER WESTLICHE 29-31 (AM LEOPOLDPLATZ) 7530 PFORZHEIM (WEST GERMANY) {(0 72 311 102290/70«£FATMARK TELEX 783929 pa< TO d 10.02.1987 III/Be 6 86 16 377.9 Karl Lenhardt, 7531 Neuhausen-Hamberg Device for producing a spacer frame for insulating glass Expectations: 1. Device for producing a rectangular Spacer frame for insulating glass by bending a hollow profile bar four times in a common bending plane and connecting its ends together, with a horizontal or inclined retaining wall, on the edge of which there is a holder for a hollow profile bar to be bent and one or more bending tools, the bending plane of which coincides with the top of the retaining wall, I $ i « t
«1.1 &bull; 1 · < characterized in that a frame closing tool (15) is provided which can be displaced parallel to the support wall (3) and thus can be varied in its distance from the holder (4) and the bending tools (8, 9), which has means (31) for deflecting one end (20) of the hollow profile bar (7) out of the bending plane (5) while the two ends (19, 20) of the hollow profile bar approach each other, 10 that the closing tool (15) has positioning devices (27,27a; 34,35; 44,47; 50,53) for positioning the ends (19,20) of the hollow profile bar so that they lie flush opposite one another, 15 and two grippers (44,47; 50,53) that can be moved towards one another parallel to the bending plane (5), by means of which the thus positioned ends (19, 20) of the hollow profile bar can be brought closer to one another. 20 2. Device according to claim 1, characterized in that on the closing tool (15) one or more stops (27, 27a) of the same height _In i »ta * 11 * * * 4t 4 * tt · &bull; * f · »in· 4 it t e · » · · &igr; are provided, against which the Rshiüenschenschen '17 IS^ to be connected to each other rest with the inside of the frame after completion of the bending processes.
5 3. Device according to claim 2, characterized in that on the closing tool (15): for pressing the two frames to be connected together legs (17, 18) to the stop(s) (27, 27a) two hold-down rollers (36, 39) are provided | which can be pivoted from an ineffective end position behind the bending plane (5) against the frame legs (17, 18) lying on the stops (27, 27a). 4. Device according to claim 2, characterized in that on the closing tool (15) a notching tool (60) is provided between the grippers (44, 47; 50, 53), which can be pivoted against the stop(s) (27, 27a) from an ineffective end position behind the bending plane (5). 5. Device according to claim 1, characterized in that for deflecting a At the end (20) of the hollow profile bar (7) there is provided a deflector (31) which can be retracted behind the bending plane () and which has a sliding surface (32) onto which the frame leg (18) on which the end (20) to be deflected is located slides during the bending process, and that the sliding surface (32) runs obliquely to the bending plane (5) in such a way that it lifts the sliding frame leg (18) off the supporting wall (3). 6. Device according to claim 1&ldquor; characterized in that a guide (28) with a sliding surface (29) is provided on the closing tool (15), onto which the frame leg (17), on which the other end (19) of the hollow profile bar (7) is located, slides during the bending process, and that the sliding surface (29) is inclined in the direction to the bending plane (5) runs in such a way that it guides the raised frame leg (17) against the supporting wall (3). 7. Device according to claim 1, characterized in that on the closing tool (15) two end stops (34, 35) whose mutual distance can be changed are provided for the two ends (19, 20) of the height profile rod (7). 8. Device according to claim 5, 6 and 7, characterized in that the one end stop (34) is formed on the side of the guide (28) adjacent to the deflector (31) and the other end stop (35) is formed in front of the side of the guide (28) adjacent to the deflector (31). side of the deflector (31). 9. Device according to claim 1, characterized in that the two grippers (44, 47; 50, 53) are each formed by two pairs of clamping jaws, of which one jaw (47, 53) lies with its clamping surface in the bending plane (5), while the jaw opposite it (44, 50) lies at a variable distance in front of the bending plane (5). «··· k 4 4 4«· 4 4 4 4 11 4 4 4 · 4 · 1 « M &Mgr;« » · &igr; · &diams; 4 # I (IM (IM &igr;il 44« «4 ·4 j 10. Device according to claim 6 and 9, characterized "' marked that the person directing the movable jaws or - when viewed ⁵ Direction of locking tool (15) to bracket ' 5 (4) _ is upstream. ,· 11. Device according to claim 1, characterized in e indicates that the retaining wall (3) j and the holder (4) for the part to be bent ¹ 10 Hollow profile bar (7) along the lower edge of the Support wall (3) is arranged, that an overhead conveyor (69) is provided along the opposite edge of the supporting wall (3) for conveying the assembled spacer frames (16), and that the movement path (14) of the closing tool (15) for the purpose of transferring the spacer frames \ 20 (16) to the overhead conveyor (69) up to the height of ] whose conveyor track extends. 12. Device according to claim 11, characterized in that the movement path (14) of the 25 closing tool (15) runs in a bottom-to-top cutout (13) of the supporting wall (3). 13. Device according to claim 12, characterized in that the movement path (14) of the closing tool (15) behind the bending plane j (5) is shifted. I ! 14. Device according to claim 11, characterized in that the overhead conveyor Ü (69) has pendulum-suspended hooks (75) as supporting elements for the spacer frames (16), the tip (76) of which rests against the supporting wall (3). 15. Device according to claim 9, characterized in that the supporting wall (3) is inclined only a few degrees against the vertical. 16. Device according to claim 9 and 13, characterized in that the conveyor track of the overhead conveyor (69) runs parallel to the supporting wall (3). &bull;&diams; * *·· · * ti ,11