EP0919657A1 - Embroidering frame with a web stretching device - Google Patents

Abstract

The embroidery fabric on an embroidery machine, which moves the fabric in relation to the tensioning device, has at least part of the fabric (21) held under tension by a side tensioning bar (35) so that the fabric has the same tension after the shifting movement as before the movement. During fabric movement, it is detached from the tension bar by an appropriate length for the movement. When the fabric (21) has been moved into a new position, the material is secured to the pins at the side tensioning bar (35) while the running of the threads is taken into account. The fabric is secured, during creel movement, so that it is still in relation to the needles. An Independent claim is included for an embroidery machine creel, where the tensioning bars (35) have a translatory movement in it so that, when they move, the fabric is carried with them. The side tensioning bars are divided into segments (25) which lock and release the fabric. The segments (25) are mounted to a flexible carrier chain (29), which is a closed loop between two deflection wheels (31). At the side towards the fabric, the carrier chain travels in a guide rail (33). A static unit at the creel detaches the fabric (21) from the side tensioning bars, as the fabric is moved through it. The side tensioning bars (35) have a number of pins to engage the embroidery fabric, and the fabric is detached by lifting clear of the pins. The side tensioning bar and fabric detaching unit are components of a side tensioning system (23), mounted to the creel. The fabric is automatically held under tension while its position is being shifted, using two rollers on parallel axis aligned at an angle to the movement direction of the fabric. The chain or segments ride in a guide rail to engage the segments into the fabric and hold it under tension.

Description

The present invention relates to a method for Move one with two side tension bars laterally stretched embroidery ground on an embroidery machine gate, at which method the embroidery base relative to the gate is moved, as is an embroidery machine creel Stretching an embroidery base with a device for Moving the embroidery base relative to the gate and a side tensioning bar on both sides for side tensioning of the embroidery ground.

So that wider panels can be embroidered than it Allowable height of an embroidery machine gate, were gates developed in which the embroidery ground on a lower and upper shaft is stretched or corrugated and after Embroidery the embroiderable stretched between the waves Area of the embroidery base by a certain amount from one to the other wave is rolled or rippled so that the to embroidered part of adjacent embroidery ground in the embroiderable Area between the waves. For swelling the embroidery base is moved from one wave to the other several times curled and the tension and alignment of the shot and Warp threads balanced and aligned. So that the embroidery ground is stretched evenly across its entire width, it will sideways with a side tensioning bar across each Clamping direction of the waves stretched horizontally and finally tightened in the vertical direction.

For embroidery machines with a gate, which one Allows shifting of the embroidery ground, for a Shift the embroidery ground this from the Side tensioning bar released, then the shift made, and finally the embroidery ground again in the Hook in side tension bars. It is hardly possible the lateral tension after the shift again according to the voltage before the shift. As a result, there is where one embroidery stage ends and the other others start again, especially in the side Areas of the embroidery ground, shifts in the embroidery pattern, which affect the quality of the embroidery.

It is therefore an object of the invention a method and Provide device with which and which lateral tension of the embroidery ground before and after Moving the embroidery base in the embroidery machine creel can be kept as constant as possible. In particular, should the transition from one embroidery stage to another is invisible be.

According to the invention, this is achieved in that at least part of the embroidery ground during the movement through the Sidelight stays tensioned to after the shift to have the same tension in this part as before Shift. Appropriately, it remains at the transition area stretched between the stages, so that during the transition the voltage remains constant and therefore the Transition blends invisibly into the embroidery design. In Borrowing from the term in the prior art is also in spoken of the registration of side tensioning bar, without it specify the position of the side tensioning bar in the gate.

The embroidery ground is expediently used during the Displacement over a length corresponding to the displacement loosened from the side tensioning bars to put it on the to be able to wind up the winding shaft. After or during the shift is not that of the side tension bars stretched part of the embroidery base advantageously according to the Tension of the part that remained tense to the New side tensioning strips, e.g. by hanging the Embroidery base in the mandrels of the side tension bars below Consideration of the course of the vertical weft. The embroidery base is advantageously loosened by means of a release device and by moving the Embroidery base. The embroidery base can be tensioned by hand or with a tensioning device activated by the displacement can be achieved.

The embroidery ground is advantageous during the displacement of the Gatters held so that the embroidery base relative to the Needles stand still. This can be done using a presser, which fix the embroidery base relative to the needles or with your own provided holding elements on the side tensioning bar happen which the side tension bars relative to the Fix the needles.

With an embroidery machine creel to open a Embroidery base, with a device for moving the Embroidery base relative to the gate and one on each side Side tension bar for lateral tensioning of the embroidery base the side tension bars are advantageous in the gate translationally movable so that it moves when moving the move the embroidery base stretched to the side and so at least part of the embroidery ground during and after the movement remains excited.

The side tension bars are advantageous in segments divided, which can be detached from the embroidery base or with the embroidery ground can be connected, so when moving Segment by segment can be detached from the base of the embroidery the side tension bar does not conflict with the rolling up Wave is coming.

In order to be detached from the embroidery base are the segments the side tensioning strip expediently on a flexible Carrier attached. This allows the segments move with each other in a non-linear motion, so that the segments detached from the embroidery base are separated from the embroidery base can be removed.

The flexible carrier advantageously forms a closed one Loop around two idler wheels so that the segments are in a circle be performed. This is not the dimension of the But the height of the gate is decisive for the dimension of the side tensioning bar.

The embroidery machine gate advantageously has one Dissolving device to remove the embroidery ground from the To release side tensioning bar. This can be done by hand be avoided and at the same time only the area of the Embroidery base from the side tensioning strips, which must necessarily be solved. This can be a Part of the embroidery base should be left taut.

The release device is expediently stationary on Gate arranged and the side tension bar relative to Release device movable, so that when moving the Embroidery base in the gate of the embroidery base and the Side tension bar can be detached from each other.

The side tensioning strip expediently has a large number of thorns to hang the embroidery base on. With these The embroidery ground becomes reliable in the tried and tested manner held. The embroidery ground can be lifted off at any time Thorns detached from the side tensioning bar and also back in the thorns are hung.

The release device advantageously has one Embroidery base plane on an inclined surface in order to with this Lift the surface of the embroidery base off the side tension bar and to solve thereby.

The flexible carrier is expediently the segmented one Side tensioning bar formed by a chain and on the Base side of the loop in a guide rail guided. The leadership grants a constant tension too when moving the side tensioning bar and a chain is easy to manage in a tour.

Advantageously, the side tension bar and the Release device together a side tensioning device, which is attached to the gate, causing the side tension bar is replaceable and also an old, stationary one Side tensioning bar can be replaced by a translationally movable.

Fig. 1

eine schematische Ansicht der Wellen, des Stickgrundes und der Seitenspannleisten eines Gatters gemäss dem Stand der Technik,

Fig. 2

einen Vertikalschnitt durch ein erfindungsgemässes Stickmaschinengatter,

Fig. 3

eine Teilansicht des Gatters gemäss Figur 2 von vorne,

Fig. 4

eine perspektivische Zeichnung eines Ausschnittes einer erfindungsgemässen Seitenspanneinrichtung mit Lösevorrichtung,

Fig. 5

Explosionszeichnung des Ausschnittes gemäss Figur 3.

An exemplary embodiment of the invention is described below with reference to the figures. It shows:

Fig. 1

1 shows a schematic view of the shafts, the embroidery base and the side tensioning strips of a gate according to the prior art,

Fig. 2

2 shows a vertical section through an embroidery machine gate according to the invention,

Fig. 3

3 shows a partial view of the gate according to FIG. 2 from the front,

Fig. 4

2 shows a perspective drawing of a section of a side tensioning device according to the invention with a release device,

Fig. 5

Exploded view of the detail according to Figure 3.

When the embroidery base 21 is swelled onto the shafts 19, 19 ' this is released from the side tension bars 20. For this the Embroidery base several times from one shaft 19 to the other shaft 19 'and back from the shaft 19' to the shaft 19 undulated, the tension of the embroidery base 21 is balanced, the vertical weft threads 16 vertically and the horizontal warp threads 18 are aligned horizontally. Then the embroidery base 21 is partially stretched, then the Embroidery base in the side tension bars arranged on both sides 20 hooked in and then the embroidery ground is stretched. In order to is a lateral, arcuate indentation (24) of the Embroidery ground 21 prevented.

Embroidery machine gates 11 are on the needle side of the figure 2 needle carriage 13 only partially shown. The Gate 11 has vertical frame parts 15, horizontal Frame parts 17 and horizontally extending shafts 19, 19 ' and is relative to the formation of stitches as a whole Needle carriage 13 can be moved horizontally and vertically. Of the Embroidery base 21 is between the lower shaft 19 and the upper shaft 19 'spanned in the vertical direction. At the Embroidery will take place between the shafts 19, 19 ' located area e.g. embroidered from top to bottom, being the gate gradually from a lower position to one upper position is moved. After embroidering one Another area can be embroidered in the same way become. For this purpose, the embroidery base 21 is rippled, for example, unrolled from the shaft 19 and onto the Shaft 19 'rolled up after embroidering the embroiderable Area of the embroidery ground 21 the last stitches at the bottom Edge 22 in place at the top edge 22 'of the embroiderable To shift the area of the embroidery base 21, in front of the Shift were the first stitches. During this Shift remains the embroidery base 21 relative to the needles stand and the gate 11 moves by the amount in one Direction while the embroidery ground 21 is in the same amount the other direction is rippled.

On the vertical frame parts 15 are on both sides Side tensioning devices 23 according to the invention arranged to to tension the embroidery base laterally. The Side tensioning device 23 extends somewhat over the lower edge 22 and upper edge 22 'of between the waves 19.19 'embroiderable area. The side tensioner 23 is firmly connected to the vertical frame part 15.

As FIGS. 3 to 5 show, the Side tensioner 23 has a plurality of segments 25, of which only a few are shown in the drawing are. Each segment 25 is on a link of a chain 29 attached. The chain 29 forms a closed loop and is guided above and below a deflection wheel 31. Between Deflection wheels 31 of a side tensioning device 23 runs Chain 29 in a guide rail 33, 33 '. The Guide rail 33 guides the chain and causes the Chain 29 runs straight and through the side pull through the Stickgrund 21 is neither tilted nor gives way to the train. On the side of the chain loop facing away from the embroidery base 21 the chain 29 is also in a guide rail 33 ' guided so that the vibrations of the operating Do not make the chain 29 vibrate on the embroidery machine. In the area in which the chain 29 in the straight line extending guide rail 33 is guided, the series Segments 25 to one another and form the side clamping bar 35 with thorns or others that can be hung in the embroidery base 21 Fasteners. Where the chain 29 is around the deflection wheel 31 the segments 25 are from the side clamping bar 35 turned off. The guide rails 33, 33 'are on one Holding profile 36 attached, which in turn on the side Frame part 15 is screwed.

With a shift of the embroidery base 21, the Segments 25 imposed with the embroidery base 21 for about as long as the chain 29 is guided in the guide rail 33. The Side tension bar 35 moves with it Embroidery base 21, the chain 29 translationally in the Guide rail 33 is moved, or the chain loop around the deflection wheels 31 runs. So that the segments 25 when rotating the deflection wheels 31 can be pivoted without the To tear embroidery ground 21, you have to detach from it be. To do this, there are top and bottom of the side tensioning device 23 release devices 37 (Fig. 2) arranged which of Figures 4 and 5 are explained in more detail.

In Figure 4 is a perspective view of a section the side tensioner 23 shown, in which a Deflection wheel 31 and a release device 37 are visible. Not 4 completely shows the chain 29 and the Majority of segments 25. Figure 5 shows one Exploded view of the section shown in Figure 4. Figures 4 and 5 are therefore described together.

The holding profile 36 forms a vertical groove. The one vertical frame part 15 facing channel wall 43 is with the Frame part 15 screwed. The other channel wall 45 is in the outer area perpendicular to the channel bottom 47 and is parallel to the channel wall 43. Between the orthogonal area however, the channel wall 45 and the channel bottom 47 is one Transition area bent at a 45 ° angle in order for the Tension the embroidery base 21 to create enough space. At the The orthogonal outer region of the channel wall 45 is the two guide rails 33 and 33 'attached. The gutter wall 45 is cut out at the end of the guide rails 33, 33 ', so that the chain 29 with the Segments 25 around the deflection wheel 31 in the inner region of the Holding profile 36 can be directed.

The U-shaped guide rails 33, 33 'are each made of two same angle profiles 51,51 'assembled (Fig. 5). In The guide rail 33, 33 'has a groove 53 formed in it which can slide the chain 29. The groove 53 encloses the Chain links 54 on three sides and is expanded at the bottom, by the side parts 56 of the chain links in the extension record so that the chain links 54 in the groove 53rd are held and only move in the groove direction can.

The holding profile 36 has the cutout 49 in the end region further attached the deflection wheel 31. The holding profile 36 has For this purpose, an elongated hole 55, in which a Bearing block 57 is slidably screwed. In the storage block sits the axis 59 on which the deflection wheel 31 is mounted is. The deflection wheel 31 engages with its teeth 61 in the Chain 29. At the sloping part of the channel wall 45 is a Clamping block 63 attached (only in Fig. 4). With the The clamping block 65 can remove the bearing block 57 from the clamping block 63 be pushed away, causing it to go up in slot 55 slides. The deflection wheel 31 is also moved upwards, whereby the chain 29 is tensioned.

The segments 25 are attached to the chain 29. These are equipped with thorns 67, in which the embroidery base 21 for Clamping can be hooked. To the in the thorns 67 of the segments detached embroidery base 21 to be detached from the segments 25 at the end of the guide rail 33 a release device 37 arranged. The release device 37 essentially consists from an auxiliary part 73 with the guide rail 33 connected release head 75. This has a recess 77, which is shaped according to the segments 25 so that the Segments 25 with no significant resistance to the thorns 67 can slide through the release head 75. Next is the release head 75 a release surface 79 is formed. The release surface 79 is inclined and runs sharply against the embroidery base 21 exciting part of the side tensioner 23 to and laterally past the segments 25 to behind the level of the stretched embroidery base 21.

The release surface 79 abuts when the Embroidery base 21 against the edge 81 of the embroidery base 21 from the Thorns 67 away. The tapered edge 81 penetrates between embroidery ground 21 and segment 25. The embroidery ground 21 is raised from the release surface 79 from the thorns 67 and so by the segments 25 solved. The detached part of the embroidery base 21 can now on the shaft 19 or according to Figure 4 the shaft 19 'are wound up.

For tensioning the embroidery from the shaft 19 or 19 ' Area between the shafts 19, 19 'rolled off embroidery base 21, this is done by hand or with a clamping device a continuous tension in the segments 25 mounted. This is done on the thread run of the vertical Watched weft threads

Two rubber rollers can be provided as the tensioning device, between which the embroidery base 21 is clamped. The The axes of the rubber rollers are at a flat angle to Direction of displacement so that the rollers through the Displacement of the embroidery base 21 are rotated and the Embroidery base 21 around a certain, with the angle of the axis to Span adjustable direction of displacement. Of the Stickgrund 21 is then with a wheel or a Glider guided against the mandrels 67 of the segments 25 where he hangs in a slightly relaxing manner.

In another variant of a tensioning device, the Guide rail 33 at the ends of the segments 25 in one non-linear movement, the segments 25 from Deflection wheel 31 coming first led to embroidery base 21 are then swiveled into the embroidery base plane and into this level are pulled away from the embroidery base 21 in order to close it tighten. At the other end of the guide rail Segments 25 pushed against the embroidery base 21, then from Embroidery base 21 is lifted and released by pivoting it out of the Embroidery base level and finally on the way back to the first End of the guide rail 33 deflected.

Claims (18)

Procedure for moving one with two Side tension bars on the laterally stretched embroidery base an embroidery machine gate, in which method the Embroidery base is moved relative to the gate, thereby characterized that at least part of the embroidery base (21) during the shift from the side tension bars (35) remains excited to move after this Part of the same tension as before Shift. A method according to claim 1, characterized in that the embroidery ground (21) during the shift over a length corresponding to the displacement of the Side tension bars (35) is released. A method according to claim 2, characterized in that the part of the Embroidery ground after the displacement according to the Tension of the part that remained tense to the Side tension bars (35) is tensioned, e.g. by. Hook the embroidery base (21) into the mandrels (61) Side tensioning strips (35) taking into account the Thread run. Method according to one of claims 1 to 3, characterized marked that the embroidery ground during the Shift of the gate is held so that the The embroidery base is stationary relative to the needles. Embroidery machine creel for stretching an embroidery base, with a device for moving the embroidery ground relative to the gate and one on each side Side tensioning bar for lateral tensioning of the Embroidery base, characterized in that the Side tension bars (35) in the gate (11) translationally are movable so that they move when the Move the embroidery base (21) stretched to the side. Embroidery machine gate according to claim 5, characterized characterized in that the side tension bars (35) in Segments (25) are divided, which are individually from Removable base (21) or with the base (21) are connectable. Embroidery machine gate according to claim 6, characterized characterized in that the segments (25) of the Side tensioning bar (35) on a flexible support (29) are attached. Embroidery machine gate according to claim 7, characterized characterized in that the flexible carrier (29) a forms a closed loop around two deflection wheels (31). Embroidery machine gate according to one of claims 5 to 8, characterized by a release device (71) to the Release the embroidery base (21) from the side tensioning strip (35). Embroidery machine gate according to claim 9, characterized characterized in that the loose device (71) stationary is arranged on the gate (11) and the side tensioning bar (35) is movable relative to the release device (71), so that when moving the embroidery base (21) in the gate (11) the embroidery base (21) and the side tensioning strip (35) be separated from each other. Embroidery machine gate according to one of claims 5 to 10, characterized in that the side tensioning bar (35) a plurality of thorns (61) for hanging the Has embroidery base (21). Embroidery machine gate according to one of claims 9 to 11, characterized in that the release device (71) a surface which runs obliquely to the base plane of the embroidery (79) has with this surface (79) the embroidery base (21) to lift off the side tensioning bar (35) and thereby to solve. Embroidery machine gate according to one of claims 7 to 12, characterized in that the flexible carrier by a chain (29) is formed. Embroidery machine gate according to one of claims 7 to 13, characterized in that the flexible carrier (29) of segmented side tensioning bar (35) on the Base side of the loop in a guide rail (33) is performed. Embroidery machine gate according to one of claims 9 to 14, characterized in that the side tensioning bar (35) and the release device (71) components of a Side tensioning device (23), which on the gate (11) is attached. Embroidery machine gate according to one of claims 5 to 14, characterized by a clamping device for automatic tensioning of the embroidery base 21 during the Moving the embroidery base 21. Embroidery machine gate according to claim 16, characterized characterized that the jig two the Embroidery base (21) between jammed rollers has whose axes parallel and to Direction of displacement of the embroidery base (21) are inclined. Embroidery machine gate according to claim 16, characterized characterized that the jig a Guide rail for guiding the segments (25) or the Chain (29) to the segments (25) at the Hook in the embroidery ground (21) and the To tension the embroidery ground.

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