BE1022749B1 - Brush stuffing machine - Google Patents

Abstract

A brush stuffing machine with a stuffing tool (12) with a tip (34) provides that the stuffing tool (12) can be pivoted about a horizontal axis (40), while a tongue (52) is linearly guided in the tip (34) .

Description

Brush stuffing machine

The invention relates to a brush tamping machine with a tamping tool with a tip that is pivotable about a first axis between a bundle take-over position and a stuffing position and that in the tip of a guide for one, an anchor along with the bundle bundle along the guide, at least Having a part of the finished brush forming bristle carrier stuffing tongue.

Such a brush tamping machine is known from EP 1 803 372 B1. In this brush tamping machine, a bundle pick-up pivotable about a vertical axis and a tamping tool likewise pivotable about a vertical axis are provided. The bundle picker separates bundles from a bristle magazine and transfers them to the stuffing tool immediately behind a point. In this tip a guide for a tongue is present, so that the tongue leads a recorded bundle together with anchor along the guide to a, at least a portion of the finished brush forming bristle carrier and pushes into an opening in the bristle carrier.

An anchor can be a metal plate or a wire loop.

The stuffing tool is pivoted after receiving a scattered bundle in the direction of the bristle carrier, wherein the tongue participates this pivoting movement and penetrates either deeper during this pivotal movement or after reaching the stuffing position in the top, finally to push the bundle together with anchor in the bristle carrier.

Both the stuffing tool together with the arcuate guide in the tip and the tongue are moved on a circular arc section.

Alternatively, there are linearly movable stuffing tools with rectilinear tongues, which are moved back and forth transversely.

Such brush tamping machines must always have faster cycle times.

The object of the invention is to improve a brush tamping machine of the type mentioned so that they can work with a faster cycle time.

The brush tamping machine according to the invention has a tamping tool with a tip which is pivotable about a first axis between a bundle take-over position and a tamping position and which has a tongue stuffing an anchor and bundle along the guide into a bristle carrier in the tip. The brush tamping machine according to the invention provides that the guide of the tongue in the tip is linear and that the front end of the tongue relative to the tamping tool in the tamping position performs a linear pushing movement. While in the prior art, the tongue was a circular arc segment-shaped and the guide in the top also represented a circular arc section, in the present invention, despite the pivotal movement of the stuffing tool, a linear thrust movement is realized by a linear guide. The pivoting movement of the stuffing tool is advantageous over a linear movement, because reversible pivoting movements can be realized with less effort, high precision and above all, high speed. The fact that, however, a linear movement is performed by the tongue at its front end, the movement is even faster. The linear thrust movement reduces the friction against the guide. Further, the movement of the bundle and anchor in the last part of the overall movement is linear, which leads to a smaller space requirement of the front end of the tip and the tongue. If the tongue extends in a circular path even in the last degrees of its movement to the stuffing, there is a disadvantageous lateral movement component when pressing the bundle, which loads the end of the tip and provides additional friction in the guide.

Generally, for example, the bristle carrier may be an apertured plate which is later joined to the remainder of the brush body to form a common brush body, or the bristle carrier may also be the brush body itself.

The tongue can be driven by a preferably own pivot drive, for example, by a separate arm for the drive of the tongue is present. This means that the tongue moves on the one hand in the region of its driven end along a circular arc path and on the other hand linearly in the region of the guide in the tip.

The guide for the tongue can sit on a swivel arm of the stuffing tool.

Preferably, the axis of the pivot arm of the tongue is also the first axis.

The stuffing tool can be driven by at least one cam and / or the pivot drive can be driven by at least one cam. Such a cam drive is characterized by a high mechanical stability. A possible variant here provides that the cams for the stuffing tool and for the rotary drive of the tongue are rotated by the same camshaft in rotation. This allows for forced synchronization in a very simple way.

Alternatively, it is also possible to pivot the pivot arms for the stuffing tool and for the tongue by their own electric servomotors. The control of the servomotors ensures a synchronization of the movements of the swivel arms.

The distance of the front end of the tip from the first axis is at least 200 mm, in particular at least 300 mm, so that the movement of the guide takes place on an extremely large radius of curvature. This relatively large pivot radius also ensures that the pivot angle for the pivot arm between the bundle take-over position and the stuffing position is very low, for example, between 2 and 5 °. However, this small swivel angle is already sufficient to complete the complete stroke of the stuffing tool.

The infeed stroke of the stuffing tool, for example, may only be 15-20 mm measured at the leading end of the tip between the bundle transfer position and the stuffing position. This small stroke also ensures high cycle times. In the prior art, corresponding strokes of 25 mm were normal. The percentage reduction of the stroke is therefore enormous.

The guide in the tip can be substantially linear, e.g. run horizontally. This horizontal course, which refers to the stuffing position, simplifies the alignment of the parts to each other and, above all, their production, because a linear guide is much easier to produce than a circular segment-shaped.

The first axis may be a horizontally oriented axis, whereas in EP 1 803 372 B1 the axis was vertically aligned.

The tongue is in particular formed in one piece and band-like and may for example be made of spring steel. A spring steel band makes it possible to drive the tongue without great effort by the rotary actuator. As the tongue is moved, different regions of the tongue are moved differently, namely, as stated, along a circular path and along a linear guide.

It should be emphasized that the stuffing tool can naturally also have a second guide on the back of the tip for the tongue. This guide can extend in a linear or circular arc around the pivot axis of the pivot drive. One possibility is to guide the tongue on both sides as well as up and down, similar to the guide in the tip. For example, in a top or bottom part of a guide be executed, and the part lying thereon or underneath may be flat or also provided with a portion of a guide groove, so that the guide is closed as a whole. Alternatively, the tongue could run along rollers on at least one side and be guided therethrough.

The tongue is subjected to different types of loading in its different sections and may, for example, have a section guided in at least one guide and a drive-side section. The driving-side portion, which is opposite to the front end of the tongue, is widened with respect to the guided portion, and e.g. designed as a clamping portion which is supported directly or indirectly on the pivot arm of the tongue. It can of the length adjustment of the widespread

Clamping portion are moved in the stuffed position of the tongue to close to the guide, so that this section provides for increased mechanical stability.

In particular, when the bristle carrier has an elongated shape, the longitudinal direction of the bristle carrier is oriented in parallel or slightly (i.e., 15 ° -25 °) to the first axis at an angle. The pivoting movement of the stuffing tool is thus in a plane perpendicular to the longitudinal direction of the bristle carrier.

The bust tamping machine according to the invention can be designed without so-called bundle displacer. A bundle displacer in the prior art is a separate part lying in front of the tip, which pushes aside the bundles already anchored in the bristle carrier when the next bristle tuft is stuffed adjacent to them. By means of the brush potting machine according to the invention, in which the tip itself makes a diving movement and displaces stuffed bristle tufts, such a separate displacer is unnecessary, so that the brush tamping machine according to the invention is simpler and also less complex, so that higher cycle times can be achieved.

The brush tamping machine according to the invention optionally comprises a bundle picker which feeds individual bundles to the tamping tool, in particular in a horizontal plane.

The bundle pickup may be a plate-like circular arc segment or a rotating disc which is pivotable about a vertical axis.

The stuffing tool may be aligned with the bristle carrier such that the leading end of the tip in the direction of the first axis, as viewed from the bundle transfer position to the stuffing position, has a vertically downwardly directed component. This means that the end of the tip moves downwards from above towards the bristle carrier, so it dives off slightly, pushing away the already stuffed bristles.

An optionally provided inclined surface at the top, namely on its underside in the region of the end is directed towards the end obliquely upwards and forms a Abweiserfläche for the already stuffed bristle tufts.

Of course, the top may be tapered towards the end, so that the tip tapers towards the end.

It can be a e.g. around a vertical, second axis rotating drum with holders for a plurality of bristle carriers are used, which is opposite to the stuffing tool. The located in the holder of the drum, the stuffing tool opposite bristle carrier can be padded so directly. It is thus a kind of rotating tool that can take several positions.

Further advantages and features can be found in the following description in conjunction with the accompanying drawings. 1 shows a schematic side view of a brush tamping machine according to the invention according to an optional embodiment, FIG. 2 shows the brush tufting device according to FIG. 1 with the bristle magazine omitted, and FIG. 3 shows a schematic side view of the tamping tool according to FIG. 1 with the tongue in FIG the bundle takeover position.

In Figure 1, a brush tamping machine is shown comprising a drum 10 having a plurality of brush holders, a stuffing tool 12, a bristle magazine 14, a bundle picker 16, and a plugging tongue 52. Furthermore, a feed device 18 shown symbolically by an arrow is present for so-called armatures 20, for example in the form of a wire loop or a metal plate.

In the brush tamping machine bristle carrier 22, for example plates with openings, which are later part of the finished brush, or bristle carrier 22 in the form of a complete brush body, as shown in Figure 1, stuffed.

The drum 10 is designed as a rotating holding tool, in which a plurality of holders for bristle carrier 22 are accommodated on a support 26 rotatable about an axis 24, which are fed and removed at certain positions to the carrier 26 and are stuffed in one position.

The axis 24 is preferably horizontal or slightly angled (15 ° -25 ° to the horizontal), or the elongated bristle carrier 22 are aligned with its longitudinal direction in the horizontal direction or also slightly angled to the axis 24. During the tamping movement shown below, the bristle carrier 22 to be filled is moved by movement of the carrier 26 in a vertical plane in two axes, so that the opening to be subsequently padded in the bristle carrier is always opposite the approached bristle tuft and aligned with it.

A bristle magazine 14 comprises a mechanically biased bearing having ordered juxtaposed bristles 28. A bundle picker 16, which pivots about a vertical axis 30 and includes a plate-shaped circular arc segment, travels along the magazine with the bristles 28 and removes a bundle by engaging the bundle picker 16 its along-running outer edge has a notch 32 which is filled with the bristle bundle.

The tamping tool comprises a tip 34 having a front end 36 which is pivoted about a first, preferably horizontal axis 40 between a bundle take-up position and a tamping position shown in FIG.

In the stuffing position, the end 36 may contact the bristle carrier 22 or be very close to its surface.

In the bundle transfer position, the end 36 is located on the dotted line 44. The resulting between bundle takeover position and stuffing position stroke is only between 15 and 20 mm.

The stuffing tool 12 includes a pivot arm 46 that is coupled at one end to a bearing 48. This bearing 48 is the bearing corresponding to the axis 40.

The opposite end of the pivot arm 46 carries a base 50 which merges into the tip 34.

In the tip 34 a in Figure 3 schematically recognizable, slotted in cross-section guide 56 is provided. The guide 56 in the tip 34 is linear.

The base 50 has on its upper side a groove 51, which is designed as a guide groove, for a tongue 52 shown in Figure 2, which is relative to the base 50 according to the double arrow in Figure 2 reciprocated. The tongue 52 is guided on the base 50 by placing on the base a lid 57 (see Figure 3) which closes the resulting guide 58 upwards, which could also be made linear and lies in the same plane as the guide 56.

Optionally, the guide 58 may also be arcuate.

The tongue 52 is band-like and elongated. In Figure 2, the tongue 52 is again shown separately. The tongue 52 has a guided portion 53 in which it has a relatively narrow cross section and in which it is guided in the region of the tip 34 and the base 50. In addition, however, the tongue 52 has at its tip 34 opposite end a widened clamping portion 55th

In particular, the tongue 52 is made of spring steel, so a spring steel plate.

The clamping section 55 of the tongue 52 is moved by a pivot drive 82 along a circular arc path. The pivot drive 82 includes a pivot arm 84 whose axis coincides with the first axis 40.

Between tip 34 and base 50 is an insertion opening 60 (see Figure 1) is provided, which is open to the side and in the bundle taker 16 a bristle tufts and from the feeder 18, an armature 20 can be inserted.

The front end 54 of the tongue 52 can be pushed through the tip 34 and thereby fold individual bristle bundles and together with anchor 20 into the opening in the bristle carrier 22.

The end 36 of the tip 34 has a distance from the first axis 40, which is at least 200 mm, preferably at least 300 mm.

The swivel angle between the bundle take-over position and the stuffing position is preferably at most 3 °, so it is very small.

The pivot arm 46 is pivoted back and forth by the aforementioned 3 ° by means of a servomotor or by means of the mechanism shown below.

Each pivot arm 46, 84 is driven by cams 68 A, 68 B and 70 A and 70 B. These cams are seated on a common camshaft 71. The camshaft 71 is driven by an electric motor. It is shown schematically in FIG.

The cams 68 A and B and 70 A and B are designed as adjacent pairs of disks whose outer circumference deviates from a circular shape. For the cam 68 A, there is a roller 64 on the pivot arm 46, with which the cam 68 A can come into contact. Upon appropriate contact, the cam 68 A presses the pivot arm 46 counterclockwise direction stuffing position.

The cam 68 B has on a second arm 62 of the stuffing tool a roller 66, with which it can come into contact.

The cam 68 A is thus for the pivotal movement of the stuffing tool 12 in the counterclockwise direction, i. in the stuffing, responsible, while the cam 68 B is responsible for their associated roller 66 for the pivoting movement of the stuffing tool in a clockwise direction.

Alternatively, it would also be possible to work only with a cam 68 A or B and beyond to press the roller 64 or 66 permanently against this one cam via a spring. At higher clock rates, however, two cams 68 A and B are more advantageous.

As for the drive of the pivot arm 46, a corresponding embodiment of the cam 70 A and 70 B is also provided for driving the pivot arm 84. The cam 70 A, for example, contacts a roller 73 on an arm 75 coupled to the pivot arm 84.

On the pivot arm 84 sits, covered in the figures, corresponding to the roller 64 has an associated role that can come into contact with the cam 70 B.

Thus, via the cams 70 A and 70 B of the pivot arm 84 is driven for the tongue 52 in two directions.

The operation of the brush tamping machine will be briefly explained below.

In the bundle take-over position, the bundle picker pivots the removed bundle in a horizontal plane into the insertion opening 60. The feed device 18 also transports the armature 20 to the insertion opening 60 (see FIG. 2). Subsequently, the stuffing tool 12 is pivoted to the bristle carrier 22.

In Figure 3 it can be seen that the tip 34 is moved from the illustrated bundle take-over position to the stuffing position with a slight dip forward and slightly vertically downward.

On the underside of the tip 34 in the region of the end of an inclined surface 70 is formed, which is directed to the end 36 and up and the already stuffed bristle bundles 72 pushes down, so that there is no danger that the tongue 52, supplied bristle tufts for the subsequent stuffing or anchors come in contact with bristles of the already stuffed bundles 72. This means that the tip 34 assumes the functions of the previously provided, separate and separately driven bundle displacer.

Already during the swivel stroke between the bundle take-over position and the stuffing position or later in the stuffing position, the tongue 52 is moved forward by the swivel drive relative to the base 50 and thus to the stuffing tool 12 in the direction of the end 36.

The movement of the front end 54 of the tongue 52 in the guide 56 is linear, as well as the pushing movement with which the tongue 52 presses the bristle tufts together with anchor out of the tip 34 into the bristle carrier 22.

The tongue 52 folds the bundle and pushes it into the bristle carrier 22 with the wire loop or metal plate.

Claims (18)

claims A brush tamping machine comprising a tamping tool (12) having a tip (34) pivotable about a first axis (40) between a bundle tucking position and a tamping position and having a guide (56) in the tip (34) a, an anchor (20) together with bundle along the guide (56) in a at least one part of the finished brush forming bristle carrier (22) stuffing tongue (52), characterized in that the guide (56) of the tongue (52) in the tip (34) is linear and that the front end (54) of the tongue (52) relative to the tamping tool (12) in the tamping position performs a linear pushing movement. 2. Brush-tamping machine according to claim 1, characterized in that the tongue (52) by a pivot drive (82) is driven. 3. brush tamping machine according to one of the preceding claims, characterized in that the guide (56) on a pivot arm (46) of the stuffing tool (12) is supported. 4. Brush tamping machine according to one of the preceding claims, characterized in that the tongue (52) on a separate, driven pivot arm (84) is attached. 5. brush tufting machine according to claims 3 and 4, characterized in that the pivot arms (46, 84) of the tamping tool (12) and the tongue (52) about the same axis (40) are pivotable. 6. brush tufting machine according to one of the preceding claims, characterized in that the stuffing tool (12) by at least one cam (68 A, 68 B) and / or the pivot drive (82) by at least one cam (70 A, 70 B) are driven, wherein the cams (68 A, 68 B, 70 A, 70 B) are preferably rotated by the same camshaft (71) in rotation. 7. brush tamping machine according to claim 5, characterized in that the pivot arms (46, 84) are pivoted and synchronized by their own electric servomotors. 8. brush tufting machine according to one of the preceding claims, characterized in that the front end (36) of the tip (34) has a distance from the first axis (40) of at least 200 mm, in particular at least 300 mm and / or that Stopfwerkzeug (12) travels between the stuffing processes a feed stroke of 15 - 20 mm. 9. brush tamping machine according to one of the preceding claims, characterized in that the guide (56) extends in the tip (34) is substantially linear. 10. Brush tamping machine according to one of the preceding claims, characterized in that the first axis (40) is a horizontal axis. 11. Brush-tamping machine according to one of the preceding claims, characterized in that the tongue (52) in one piece and strip-like, in particular made of spring steel, is formed. 12. brush tufting machine according to claim 11, characterized in that the tongue (52) guided in at least one guide (56, 58) section (53) and a drive-side, in particular with respect to the guided portion (53) widened clamping portion (55) has, which is supported on the pivot drive (82) of the tongue (52). 13. brush tufting machine according to one of the preceding claims, characterized in that the bristle carrier (22) to be stuffed have an elongated shape and with its longitudinal direction parallel or slightly angled to the first axis (40). 14. Brush tamping machine according to one of the preceding claims, characterized in that it is formed without bundle displacer. 15. brush tamping machine according to one of the preceding claims, characterized in that a bundle picker (16) is provided, the isolated bristle bundles the stuffing tool (12), especially in a horizontal plane feeds. 16. brush tufting machine according to claim 15, characterized in that the bundle pickup (16) comprises a circular arc segment or a disc which or which is pivotable about an axis perpendicular to the first axis (30) or rotatable. 17. Brush tamping machine according to one of the preceding claims, characterized in that the tamping tool (12) is aligned so as to beborstenden bristle carrier (22) that the front end (36) of the tip (34) in the direction of the first axis (40 ) as seen from the bundle transfer position to the stuffing position performs a vertical downward component movement, in particular wherein the tip (34) has an upwardly inclined surface (70) on its underside to the forward end (36). 18. brush tufting machine according to one of the preceding claims, characterized in that a rotating drum (10) is provided with a holder for a plurality of bristle carrier (22), and that on the drum (10) located, the tamping tool (12) opposite bristle carrier (22) can be stuffed.