STRAPPING CUTTER

Abstract

The invention describes an LED lighting assembly (1) comprising a reflector unit (11) comprising a number of reflector regions (11_lo, 11_hi); an LED carrier (10) realised to support at least one LED arrangement (2_lo, 2_hi); and at least one positioning feature (P.sub., P.sub., P.sub.Z) for positioning the LED carrier (10) relative to the reflector unit (11), wherein a positioning feature (P.sub., P.sub., P.sub.Z) is arranged in the same plane as the optical centre of the LED arrangement (2_lo, 2_hi). The invention further describes a method of manufacturing such an LED lighting assembly (1).

Claims

1. A cutter for a strapping band, the cutter comprising: a pusher element movable in a direction, a wedge foot with a pushing edge for the strapping band that can be fitted between the foot and the pusher element, and a cutting blade on the pusher element and movable in the direction therewith past the pushing edge for severing the fixed strapping band, and a punch on the pusher element and projecting in the direction past the cutting blade for at least partially penetrating the strapping band.

2. The cutter according to claim 1, wherein the foot has a recess in which the punch is engageable.

3. The cutter according to claim 1, wherein the punch is polygonal in cross-section.

4. The cutter according to claim 1, wherein the punch has a point projecting in the pressing direction and an adjoining angled stop shoulder.

5. The cutter according to claim 4, wherein, on movement of the pusher element in the direction to cut the band, the projecting point penetrates into the strapping band and the shoulder adjoining it bends a punch-out part formed as a result relative to a band surface.

6. The cutter according to claim 1, wherein the punch is approximately in the middle of the foot.

7. The cutter according to claim 1, wherein the cutting blade interacts with a cutting edge foot edge on the foot as a lower cutting edge.

8. The cutter according to claim 1, wherein the punch and the cutting blade are movable partially vertically in comparison to the foot.

9. The cutter according to claim 8, further comprising: a ram for acting on the punch for and the cutting knife.

10. The cutter according to claim 9, wherein the punch is connected to the ram with a projection opposite the cutting knife.

11. The cutter according to claim 1, wherein the punch and/or the cutting knife are floatingly mounted on a common support flange.

12. The cutter according to claim 1, further comprising: a band detector position detection of the strapping band to be severed.

13. The cutter according to claim 12, wherein the band detector is a laser-type detector.

14. The cutter according to claim 9, further comprising: a hydraulically and/or pneumatically and/or operating with mains voltage or battery drive for the ram.

15. The cutter according to claim 1, wherein the cutter is mobile or stationary.

16. A cutter for a strapping band, the cutter comprising: a support; a wedge foot carried on the support and engageable under the band and formed with a lower cutting edge and thereadjacent a recess open toward the support; a pusher element on the support displaceable in a direction toward and away from the foot; a blade carried on the pusher element, having an upper cutting edge, and movable past the lower cutting to cut the band between the upper and lower cutting edges; and a punch carried on the pusher element and projecting in the direction toward the foot and past the upper cutting edge and engageable in the recess such that, prior to cutting the band between the cutting edges, the punch penetrates through the band into the recess to arrest the band in the cutter.

Description

[0024] FIG. 1 is an overview of a strapping cutter,

[0025] FIGS. 2A to 2D show details of the cutter according to FIG. 1 from different angles, and

[0026] FIG. 3 shows the severed end of the strapping band with the punch-out.

[0027] The drawing shows a band cutter that can cut a strapping band indicated at 1 in FIG. 1. The strapping bands 1 are mostly steel strapping bands. The invention is of course not restricted to this. According to the embodiment, the steel band or strapping band 1 in question is looped around strip-metal coils, which are not shown in detail, and have to be cut for further processing of the strip-metal coils. For this purpose as shown in FIG. 1 a foot 2 of the cutter with a pushing edge is pushed under the tensioned strapping band 1 in the direction shown by a double arrow in FIG. 1. To this end, the cutter shown in the overview in FIG. 1 is carried on a three-dimensional actuating device 5 shown schematically in FIG. 1. The actuating device 5 is advantageously a robot arm. Of course, this is only an example. In addition, the actuating device 5 can in principle be dispensed with in the event that the cutter is designed to be mobile and is manipulated by an operator.

[0028] In any case, the actuating device 5 shown in FIG. 1 ensures that the cutter, which is to be described in detail below, is pushed under the tensioned strapping 1 with its foot 2. The wedge shape of the pushing edge 3 ensures that this process can be carried out and the tensioned strapping 1 is increasingly lifted off the strapped material. For this purpose, the sliding edge 3 may have an angled upper face indicated in FIG. 1 and forming with respect to a horizontal line an angle of approximately 10. Typically, angles of inclination a between 5 and 20 are observed. Of course, this is not restrictive. The angle also corresponds to a cutting angle when the strapping band 1 is severed, which is still to be described.

[0029] In particular, the detailed views of FIGS. 2A to 2D now show the foot 2 with the pushing edge 3 and additionally a pusher element 4 and a cutting blade 5. Using the pusher element 4, the strapping 1 can be gripped between the foot 2 and the pusher element 4. This fixation ensures that, during a cutting process with the aid of the cutting blade 5, the tensioned strapping 1 does not spring open after cutting and that the end of the strapping 1 that has been cut through by the cutting blade 5 is held in place.

[0030] The cutting blade 5 for severing the fixed strapping 1 an upper cutting edge during this process. An edge 6 on the foot 2 takes on the function of a lower cutting edge 6. In this way, the movable cutting blade 5 and the foot edge 6 define a pair of metal scissors 5, 6 or shears 5, 6, provided that the strapping 1 is a steel band. Both the cutting blade 5 and the pusher element 4 are for the most part designed to be movable vertically compared to the foot 2, as indicated by a double arrow in FIG. 2B. According to this embodiment, a common and schematically indicated ram 7 moves the pusher element 4 and the cutting blade 5. The punch 7 can also be a cylinder. In any case, the ram 7 executes the traversing movements shown in FIG. 2B vertically in comparison to the foot 2. A hydraulic drive may provide for the drive of the ram 7 or a cylinder at this point.

[0031] According to the invention, the pusher element 4 is formed as a punch that at least partially penetrates the strapping 1. According to the embodiment, the punch 4 is one of triangular cross-section. Consequently, the foot 2 has a complementary recess 8 that is also triangular and is adapted to the shape of the triangular punch 4. As a result, the punch 4 as a whole can penetrate the strapping band 1 or at least partially penetrate it and dip into the recess 8 in the foot 2.

[0032] The punch 4 is equipped on the foot side with a point 9 projecting in the pressing direction or the direction of travel of the punch 4 according to the double arrow in FIG. 2B. In addition to the projecting point 9 to a rearwardly angled stop shoulder 10. The projecting point 9 is provided in the region of an apex of the triangle of the triangular cross-sectional shape of the punch 4. In contrast, the stop shoulder 10 extends in the direction of a base side of the triangle in question opposite the apex.

[0033] In this way, the punch 4 penetrating into the strapping 1 forms a punch-out 11 in the strapping 1 as shown in FIG. 3. This punch-out 11 in the strapping 1 is created in that the punch 4 with its projecting point 9 cuts through the strapping 1. Since the stop shoulder 10 angled back from the projecting point 9, opposite the point 9, the punch-out 11 is connected to the strapping 1 at the base of its triangle. In this way, the stop shoulder 10, which adjoins the projecting point 9, bends the punch-out 11 with respect to a band surface of the strapping band 1.

[0034] The bent punch-out 11 can more or less dip into the recess 8 in the foot 2 during this process. In this way, the punch 4, the bent punch-out 11 and the recess 8 in the foot 2 taken together ensure that the subsequently severed end of the strapping 1 is securely held by the severing device. This is because the punch 4 penetrating into the strapping band 1 functions like a claw dipping into the strapping band 1 and ensures a secure hold.

[0035] The punch 4 is arranged approximately centrally in the foot 2. The same applies to the recess 8 in the foot 2 that interacts with the punch 4. It can also be seen from the detailed views of in FIGS. 2A to 2D that the punch 4 of the ram 7 extends by a distance U past the knife 5. This dimension U is such that when the ram 7 acts, the punch 4 first penetrates the strapping 1 and forms the bent punch-out 11 as shown in FIG. 3. As a result, the end of the strapping 1 that is to be severed subsequently is securely held. Only after this fixing of the end of the strapping 1 to be severed does the cutting blade 5 sever the strapping 1. For this purpose, the cutting blade 5 and the foot edge 6 define the cutting shear 5, 6 described above. A support flange 14 for the common mounting of the punch 4 and the cutting knife 5 ensures their proper linear guidance.

[0036] In order to detect the position and align the described cutter with respect to the strapping band 1 holding the material to be strapped, a band detector 12 can be provided as indicated schematically in FIG. 1. The band detector 12 works in the present case as a laser-type detector, as has already been described above. To control the three-dimensional positioner S, a common controller 13 is provided that processes corresponding measured values from the band detector 12 and controls the positioner S accordingly, so that it can move the foot 2 to cut the strapping 1 and thus the band cutter as a whole.

[0037] A pneumatic motor or an electric drive can be used to drive the ram 7. If an electric drive is used, it can be operated with mains voltage or alternating voltage, for example. Mobile use is also possible with a battery-operated electric drive possible and is covered by the invention. Consequently, the cutter can be designed to be mobile as a hand-held device or as a stationary device in conjunction with the actuating device S described and operating in three dimensions. Both are expressly possible.

[0038] A comparison of FIGS. 2A to 2D shows that the punch 4 and the cutting knife 5 are mounted on the common support flange 14. The support flange 14 provides the desired linear guidance of both the punch 4 and the cutting knife 5. In addition, a floating mounting can be implemented in this connection. In fact, according to the embodiment, the procedure is such that the support flange 14 allows a lateral movement of the punch 4 by means of, for example, springs attached on both sides and not shown in detail, that is in the longitudinal direction of the strapping 1. This cushions the wall force exerted by the strapping 1 on the punch 4. As a result of this, any shearing forces acting on the punch 4 are reduced.