TWI582288B - Embroidery machine with fabric tensioning device and method for operating the embroidery machine - Google Patents

Description

Embroidery machine with fabric tensioning device and method of operating the same

The present invention relates to an embroidery machine having a special fabric tensioning device.

In an industrial embroidery machine, in order to be able to perform embroidery, it is necessary to tighten the fabric before the embroidery process. Large embroidery machines typically have two fabric shafts that unwind the fabric from the fabric shaft during tentering or roll the fabric onto the fabric shaft. In this type of machine, the necessary tensioning of the fabric is achieved by rotating the fabric shaft in the opposite direction (cf., for example, EP 0 950 746 or EP 0 148 127). In the case of a medium multi-head knitting machine, other methods for tensioning the fabric are also known. An embroidery machine is described, for example, in DE 7318662, in which the spacing of the two clamping strips is increased by means of a curved rod, so that the fabric fastened to the clamping strip is tensioned.

Reverse rotation of the fabric shaft requires additional device components, such as chains, cables, further drives, and the like. In addition, the position of the fabric relative to the embroidery head cannot always be precisely adjusted. A separate mechanism or a separate drive can also generally be used in an alternative tensioning method known from the prior art for varying the spacing between the clamping strips to tension the fabric.

US 2001/0037755 A1 discloses a small sewing machine/embroidery machine. It has a support which can be moved in two spatial directions by means of a drive. The two arms opposite each other can only be displaced by transferring and holding the fabric, the two arms being attached to the bracket. The arm is fastened to one side, which is why it is impossible to maintain a high constant tension. Because there are only brackets, and therefore there are also arms It is connected to the embroidery machine only by the driving device, and thus is slightly movable or kept slightly moved, so that a high force cannot be obtained.

Accordingly, it is an object of the present invention to provide an embroidery machine that does not have one or more of the disadvantages mentioned at the outset. In particular, the object is to propose an embroidery machine that allows the fabric to be embroidered to be stretched, wherein the mechanism for tensioning should be constructed as simply as possible. Further advantages and objects of the invention are presented by the following description.

According to the invention, the above object is achieved by the embroidery machine according to claim 1 and the method for operating the embroidery machine according to the request item 11.

In particular, this is an embroidery machine having a fabric tensioning device for tensioning and holding a fabric to be embroidered, wherein the fabric tensioning device has at least a first longitudinal portion and a second longitudinal direction Partially, the two longitudinal portions are arranged opposite each other and have a fabric holder, the spacing between the two longitudinal portions can be varied to tension the fabric, and - in order to change between the first longitudinal portion and the second longitudinal portion The pitch, the first longitudinal portion may be fixed to the embroidery machine, and in the fixed state of the first longitudinal portion, the second longitudinal portion is movable in the first spatial direction, preferably by means of a drive.

In particular, the method mentioned is a method for operating an embroidery machine having a fabric tensioning device for tensioning and holding a fabric to be embroidered, wherein the fabric tensioning device Have first a longitudinal portion and a second longitudinal portion, the longitudinal sections being arranged opposite each other and having a fabric holder, the method comprising the steps of: placing a fabric on the longitudinal portion and fastening the fabric to the fabric holder Connecting the first longitudinal portion to the embroidery machine, - releasing the connection between the first longitudinal portion and the second longitudinal portion, - moving the second longitudinal portion in the first spatial direction relative to the first longitudinal portion, thereby increasing the longitudinal direction The spacing between the portions, thus tensioning the fabric, - joining the first longitudinal portion and the second longitudinal portion, - uncoupling the connection between the first longitudinal portion and the embroidery machine.

Embodiments of the invention will be described below. Features mentioned in the context may be considered (single) as preferred features, and assuming that the features are not mutually exclusive, they may be implemented separately or in any combination.

As described above, changing the spacing between the first longitudinal portion and the second longitudinal portion (and thus the fabric), the first longitudinal portion can be secured to the embroidery machine and preferably relative to the embroidery machine and/or relative The substrate does not move in a fixed state. When the first longitudinal portion (releasably) is attached to the embroidery machine, the movement of the first longitudinal portion relative to the embroidery machine in the first spatial direction is prevented, and only after the connection is released, it is possible to conveniently again Perform the movement. At this point, however, the second longitudinal portion is conveniently movable relative to the first longitudinal portion and relative to the embroidery machine in the first spatial direction. In general, it is advantageous if one of the two longitudinal portions is movable in the first spatial direction independently of the other longitudinal portion.

A further configuration of the embroidery machine differs in that the fabric is taut The device has a first side portion and a second side portion that are disposed opposite each other, have a fabric retainer, and are preferably disposed from the second longitudinal portion to the first longitudinal portion. Furthermore, it is advantageous if the side portions are rigidly connected to the second longitudinal portion and/or they are releasably connected to the first longitudinal portion.

Conveniently, the first side portion and the second side portion are moveable with respect to the embroidery machine (in the first spatial direction) together with the second longitudinal portion, and in particular, preferably connected to the embroidery machine at the first longitudinal portion It is moved while being fixed on the embroidery machine. To this end, the second longitudinal portion and the first side portion and the second side portion may be rigidly connected to each other.

The first longitudinal portion and/or the second longitudinal portion are preferably at least 0.5 meters or 1.0 meters long, and/or at most 15 meters or 10 meters long. The first side portion and/or the second side portion are preferably at least 0.3 meters or 0.6 meters long, and/or at most 2.0 meters or 1.6 meters long.

The longitudinal portions are preferably oriented (substantially) parallel to each other. Advantageously, this also applies to the side portions. Conveniently, the longitudinal portion and the side portions are (substantially) configured to be rectangular or square in a state of being connected to each other (to move together during operation of the embroidery machine). The fabric tensioning device can have a frame or creel that is constructed from a longitudinal portion and a side portion, if provided. The invention is particularly applicable to a multi-head embroidery machine having a frame. However, it seems to be advantageous to use it in combination with a large embroidery machine having two fabric shafts. In this case, the two longitudinal portions each have a fabric shaft. The fabric shaft constitutes a fabric holder. Thus, one fabric shaft can be moved relative to another fabric axis, or the spacing of the fabric shafts can be varied.

A fabric holder is used to fasten the fabric to the longitudinal portion or to the side portion. The fabric holder on the first side portion and the second side portion is preferably a clamping strip. The fabric holders on the first longitudinal portion and the second longitudinal portion are preferably also clamp strips or fabric rolls or fabric shafts for winding the fabric. However, the rollers or shafts do not have to be rotated in opposite directions because, as mentioned above, the tensioning of the fabric is achieved by varying the spacing.

Conveniently, in all cases, the mentioned clamping strips each have a support for the fabric extending along the side portions, as well as a clamping element. The clamping element and the support can then receive the fabric between them, which is technically advantageous in that the clamping element surrounds the support and can therefore cooperate in a clamping manner with the support. The movement of the fabric perpendicular to the longitudinal portion or perpendicular to the side portions is prevented by the cooperation of the clamping elements with the support. For example, the clamping strip can take the form of a profile. Their length is preferably from 200 mm to 600 mm, and conveniently, they are made of aluminum.

According to a further configuration, the two longitudinal portions are movable together in the first spatial direction relative to the embroidery machine, and preferably also moved perpendicularly to the embroidery machine in the second spatial direction to embroider the fabric, or Move during the embroidery operation. During the common movement, the position and/or orientation of the longitudinal portions relative to each other is fixed or remains unchanged. Conveniently, the two spatial directions are oriented (substantially) at right angles to each other. It is also reasonable for many types of machines that the two spatial directions are (substantially) in a horizontal or vertical plane.

A guide member extending in the first and/or second spatial direction may be provided to cause the first longitudinal portion and the second longitudinal portion to move together during the embroidery process move.

Conveniently, a drive means is provided for co-moving the two longitudinal portions in the first spatial direction during the embroidering of the fabric, in the fixed state of the first longitudinal portion (ie, in the first longitudinal portion) When the embroidery machine is in use, the second longitudinal portion is preferably movable in the first spatial direction by means of the same drive. Therefore, the driving device is in a specific position to move the two longitudinal portions together in the first spatial direction or to move the second longitudinal portion in the first spatial direction while not moving the first longitudinal portion. Of course, the second longitudinal portion can also be moved in the first spatial direction by means of another or further drive.

If the longitudinal portion moves in the first spatial direction and the second spatial direction during the embroidery process, it is preferred to provide one drive for movement in the first spatial direction and another drive for the second spatial orientation Move on.

The first longitudinal portion and the second longitudinal portion may be conveniently connected to each other in a releasable manner such that on the one hand (when the connection is released) their spacing is variable, but on the other hand (in the connected state of the longitudinal portion) The spacing can also be fixed. Advantageously, the fabric tensioning device has a guiding member on which the first longitudinal portion is mounted so that a displacement element can occur in the first spatial direction (relative to the second longitudinal portion). Conveniently, the guide member is rigidly coupled to the second longitudinal portion. Therefore, the mentioned guiding member can be moved in the first spatial direction with respect to the embroidery machine. Conveniently, the guiding member is a rod or strip, and the first longitudinal portion is mounted on the rod or strip in a displaceable manner.

Furthermore, it is advantageous if a first fastening member is provided for releasably connecting the first longitudinal portion to the guiding member. Here, the fastening member can be attached to the first longitudinal portion. The movement of the first longitudinal portion relative to the second longitudinal portion in the first spatial direction may be prevented by the first fastening member. The movement of the first longitudinal portion relative to the second longitudinal portion in the first spatial direction is only possible to occur again conveniently after the first fastening member is released.

It has proven to be advantageous to provide a second fastening member for releasably attaching the first longitudinal portion to the embroidery machine to secure the first longitudinal portion to the embroidery machine as described above. The movement of the first longitudinal portion relative to the embroidery machine is only possible to occur again conveniently after the second solid member has been released.

According to a preferred configuration variant, two, three or more first and/or second fastening members are provided for the first longitudinal portion. It has proven to be advantageous if, in all cases, the first and/or second fastening members are provided at both ends of the first longitudinal portion (or in the region at both ends). Furthermore, it is convenient if the first fastening members are attached at a distance of 1.5 to 3 meters, in particular between 2 and 2.5 meters, along the first longitudinal portion. The same applies preferably to the second fastening member.

Of course, it is also possible to successively connect the first longitudinal portion to the embroidery machine and to release the connection between the first longitudinal portion and the second longitudinal portion, or to independently and/or successively actuate the first fastening member and a second fastening member. However, it has proven to be advantageous to couple the first fastening member and in the sense that actuation of one fastening member can also actuate another fastening member a second fastening member. Conveniently, the second fastening member is configured to contact the first fastening member. In one aspect, a connection is formed between the first longitudinal portion and the embroidery machine by contact of the first fastening member and the second fastening member, thereby preventing the first longitudinal portion from moving relative to the embroidery machine in the first spatial direction. On the other hand, by means of said contact, the connection between the guiding member and the first longitudinal portion can also be released, so that it is possible for the second longitudinal portion to move in the first spatial direction relative to the first longitudinal portion. The fastening members mentioned in this document (see also the description of the figures) can also be disclosed independently of the specific configuration of the device, i.e., also typically used in embroidery machines or as part of an embroidery machine.

Conveniently, the first fastening member is a clamp that is pressed against the guide member in a first position. Therefore, frictional engagement and/or forced engagement can be caused between the clamp and the guide member. The pressing can be performed by a spring member or by pneumatic or hydraulic means. However, it has proven to be particularly convenient if the clamp is pressed by the tension of the fabric or by the force exerted by the fabric on the first longitudinal portion on the guide member. Thus, the clamp (or a portion thereof) is preferably held in a (first) position by a tensile force applied by the fabric, wherein the clamp is pressed against the guide member or in a position that is clamped by the guide member. Here, it is advantageous if the clamp is configured such that the contact pressure depends on the force exerted by the fabric on the first longitudinal portion, and the greater the contact pressure, the greater the force applied by the fabric. Therefore, self-locking is achieved. Preferably, the clamp is transferable to the second position by contact with the second fastening member, wherein the clamp is released from the guide member, or at least the contact pressure is reduced (compared to the first position) such that the first longitudinal portion It is possible to move in the first spatial direction along the guiding member relative to the second longitudinal portion move. A second fastening member is used to connect the first longitudinal portion to the embroidery machine. According to a preferred configuration, the second fastening member is a bolt or pin that is fastened to the embroidery machine in a displaceable manner. Therefore, it is desirable that the movement of the first longitudinal portion relative to the embroidery machine in the first spatial direction is prevented by the contact of the pin with the clamp (at the second position of the clamp). If the clamp is attached to the first longitudinal portion, the pin can, for example, actively cooperate with the clamp to form a connection between the embroidery machine and the first longitudinal portion.

According to a particularly preferred configuration, the clamp has one or more plates. The plate has an opening through which the guide member travels. By placing the plate obliquely (tilted relative to the guiding member), the two mutually opposite edges of the opening are in contact with the guiding member, thereby creating the aforementioned clamping. Conveniently, a spring member is provided which exerts a force on the plate to form an inclined position of the plate, thus meaning that the edge of the plate is in contact with the guide member. If the guiding member now exerts a tensile stress with respect to the panel shifting element, or the fabric on the first longitudinal portion, the inclined position of the panel can be enhanced because one of the edges on the opening is dragged by the guiding member.

The terms in this document should preferably be understood in a manner that can be understood by those skilled in the art. In particular, if there is a fuzzy usage, (as an alternative or in addition) the preferred definitions listed in this document can be used.

The words "longitudinal part" and "side part" are chosen only for the purpose of dividing the concept and do not reflect their relative length. However, the preferred longitudinal portion is actually longer than the side portion.

According to a further configuration of the embroidery machine, the spacing between the first side portion and the second side portion may also vary. Combining the features disclosed in the vertical section and their Spatial variations (fastening members, drives, etc.) can also be disclosed as preferred features in conjunction with side portions, as this is technically justified. This applies to the embroidery machine as well as the method for operating the embroidery machine. Of course, the terms "first longitudinal portion", "second longitudinal portion", "first spatial direction", and the like may be replaced by "first side portion", "second side portion", "second special direction", and the like, respectively.

Specifically, the embroidery machine is disclosed as a further preferred embodiment, except that in order to change the spacing between the first side portion and the second side portion, on the one hand, the first side portion can be fixed to the embroidery machine (or Connected to the embroidery machine), and in the fixed state, the first side portion preferably does not move relative to the embroidery machine and/or relative to the substrate, and on the other hand, in the fixed state of the first side portion, the second The side portions are movable in the second spatial direction (preferably by means of a drive). Furthermore, it is advantageous if the two longitudinal portions and the two side portions are movable together in the second spatial direction with respect to the embroidery machine, and preferably also move perpendicularly to the embroidery machine in the first spatial direction, Embroider the fabric. In order to allow the two longitudinal portions and the two side portions to move together in the second spatial direction (during the embroidery of the fabric), it is convenient to provide the driving means, in the fixed state of the first side portion, the second The side portions are preferably movable in the second spatial direction by means of the same drive. Of course, the second side portion can also be moved in the second spatial direction by means of another or further drive.

If "attachable" and "detachable" are mentioned, it is preferred to understand the releasable connection as the case where the use is designed to be preferably repeated and refastened during normal operation of the device. These fastening members.

If it is mentioned that the first portion is movable or movable relative to the second portion, it is preferred to disclose a general relative movement, that is, not only to disclose movement of the first portion relative to the second portion, but also to disclose movement of the second portion relative to the first portion.

As described above, the present invention also includes a method for operating an embroidery machine having a fabric tensioning device for tensioning and holding a fabric to be embroidered, the fabric tensioning device having a first A longitudinal portion and a second longitudinal portion, the longitudinal portions being disposed opposite each other and having a fabric holder. The steps of the method preferably include placing the fabric on the longitudinal portion and fastening the fabric to the fabric holder. Conveniently, the fabric is pre-tensioned prior to fastening, and the force during the pre-tensioning process is preferably at least 20% of the tensioning force after the actual tightening process (by varying the spacing between the longitudinal portions) 40%, and / or up to 80% to 60%. After fastening the fabric to the fabric holder, the first longitudinal portion is coupled to the embroidery machine to prevent the first longitudinal portion from moving relative to the embroidery machine in the first spatial direction. Simultaneously or subsequently, the connection between the first longitudinal portion and the second longitudinal portion is released such that the second longitudinal portion is likely to move in the first spatial direction relative to the first longitudinal portion. The spacing between the longitudinal portions is increased and the fabric is tensioned by subsequent movement of the second longitudinal portion relative to the first longitudinal portion in the first spatial direction. After tensioning, the first longitudinal portion and the second longitudinal portion are reconnected such that the spacing of the longitudinal portions is fixed and the connection between the first longitudinal portion and the embroidery machine is released.

Preferably, the longitudinal portion moves together in the first spatial direction relative to the embroidery machine, and preferably also moves vertically in the second spatial direction perpendicular to the embroidery machine Move to embroider the fabric. According to a particularly preferred configuration variant, on the one hand, the second longitudinal portion is moved relative to the first longitudinal portion by means of the same drive, while the first longitudinal portion is connected to the embroidery machine and, on the other hand, to the fabric During the embroidery, the first longitudinal portion and the second longitudinal portion are moved together in the first spatial direction with respect to the embroidery machine by the driving means.

Furthermore, as a method step, the method comprises one or more of the preferred features mentioned in the device according to the invention (or functions that may be achieved by these features). Thus, a device according to the invention may have specific components that may perform one or more of the method steps mentioned in connection with the method.

The invention will be described below by way of examples with reference to the accompanying drawings.

1 and 2 show the embroidery machine 11. In this case, the embroidery machine is a multi-head embroidery machine, i.e., a mechanical type in which the inventive fabric tensioning concept can be implemented particularly well. The embroidery machine 11 has a fabric tensioning device 21 having a first longitudinal portion 23 and a second longitudinal portion 25 (not shown), as well as a first side portion 27 and a second side portion 29. The illustrated horizontal orientation of the fabric tensioning device 21 or longitudinal portions 23, 25 and side portions 27 and 29 corresponds to a preferred configuration variant. However, the concepts can also be implemented vertically or at other angular positions. Since the embroidery head is fixed, it is necessary to move the fabric 19 relative to the embroidery head during the embroidery process. For this purpose, the longitudinal portions 23, 25 and the side portions 27, 29 are designed to be relative to the embroidery machine 11 or move in the first spatial direction 61 and the second spatial direction 72 relative to the embroidery head. In this case, the spatial directions 61 and 72 are oriented horizontally and are in a straight line depending on the orientation of the fabric tensioning device 21. Moreover, they are (substantially) at right angles to each other, which in the illustrated embodiment also corresponds to the arrangement of the longitudinal portions 23 and 25 with respect to the side portions 27 and 29. However, in addition to this preferred orientation of the spatial directions 61 and 72, many other orientations are possible. In each case a separate drive is provided for the movement in the first spatial direction 61 and the second spatial direction 72 (compare Fig. 4). The fabric 19 is placed on the fabric tensioning device 21 prior to the start of the embroidery process. To this end, in the illustrated example, a moving fabric roll holder 13 is provided with a plurality of rollers from which the fabric web 19 can be unwound and can be pulled to the fabric tensioning device 21 on. If the fabric rolls are placed on both sides of the embroidery machine 11, in all cases the fabric web 19 can be pre-tensioned by rotating the fabric rolls in opposite rotational directions, and then the fabric 19 is finally fastened to the longitudinal portion 23 and 25 and side portions 27 and 29.

Figures 3a through 3d schematically illustrate the process of tensioning the fabric 19. The first longitudinal portion 23 and the second longitudinal portion 25 of the fabric tensioning device are shown. The two longitudinal portions 23 and 25 have a fabric holder 31, which in this example is a clamping strip, which in each case has a fabric support 33 and a plurality of clamping elements 35 . The fabric support 33 is formed from strips, and the gripping elements 35 are (substantially) C-shaped profiles so as to surround the fabric support 33, for example, as shown in Figure 3b. The fabric 19 can be pre-tensioned prior to fastening the fabric 19 to the fabric holder 31. After the clamping elements 35 have been attached, ie the weaves on the two longitudinal portions 23 and 25 When the object has been clamped between the fabric support 33 and the clamping member 35, the actual tightening process can begin. In this respect, it should first be mentioned that during the embroidery process, the two longitudinal portions 23 and 25 are connected to each other, i.e. fixed in a defined position relative to each other, so that they can be in two spatial directions with respect to the embroidery head. Move on 61 and 72 together. The connection between the longitudinal portions 23 and 25 is formed by a rack 39 that is rigidly connected to the second longitudinal portion 25. In contrast, the connection of the rack 39 to the first longitudinal portion 23 is releasable. The rack 39 has a guide member 37 or is connected to one such guide member. The guiding member 37 (after the fastening member 41 is released) causes the first longitudinal portion 23 to move along the guiding member 37 with respect to the second longitudinal portion 25, and thus moves in the first spatial direction 61. The releasable connection between the first longitudinal portion 23 and the guiding member 37 can be formed by means of a (first) fastening member 41, here in the form of two plates 43 at all In this case, there is an opening 46 through which the guiding member 37 passes. The guide member 37 is housed between the edges of the opening 46 in a clamping manner by the inclined placement plate 43. The plate 43 is held by one side of the holder 47, however, the holder will cause the plate 43 to rotate or pivot. In the illustrated example, the holder 47 is a recess in which the side of the plate 43 is received, thereby making it possible to rotate about the axis of rotation about the side of the plate 43 (or perpendicular to the side), or to tilt the plate 43. Conveniently, the plate 43 is tilted in the reverse direction, which is achieved by a spring element 45 connected to the plate 43. Therefore, the spring force acts on the plate 43 and forms an inclined position, thereby bringing contact between the plate 43 and the guide member 37. This contact in turn leads to clamping, the strength of the clamping being dependent on the force exerted by the tensioned fabric 19 in the first longitudinal portion 23, thus forming a self-locking. The greater the force, The contact pressure of the plate 43 on the guide member 37 is larger. This is because the guide member 37 drags one edge of the plate opening 46, thus forming a more inclined position, resulting in stronger clamping. Therefore, the strength of the clamping is adapted to the nature of the fabric to be tensioned as well as the tension. The connection between the first longitudinal portion 23 and the guide member 37 is released by the bolts 53 which are in contact with the plate 43 to counteract the inclined position of the plate. As can be inferred from Figures 3a to 3d, the plates 43 travel towards each other in an inclined position. The bolts 53 travel between the sides of the plate 43 that are close to each other and force the sides apart. Therefore, the clamping generated between the plate 43 and the guide member 37 is released. The bolt 53 also has the function of securing the first longitudinal portion 23 to the embroidery machine, thereby preventing the first longitudinal portion 23 from moving relative to the embroidery machine in the first spatial direction 61. As can be seen from Figures 3b and 3c, the bolt 53 is in contact with the plate 43 while releasing the connection between the first longitudinal portion 23 and the guiding member 37 and between the embroidery machine and the first longitudinal portion 23 ( Relieved) rigid connection. This completes the technical prerequisites for the tightening process to date. The fabric 19 attached to the fabric holder 31 is now tensioned because the first longitudinal portion 23 moves over the bolt 53 in the first spatial direction 61. Subsequently, the bolt 53 is removed while the plate 43 is forced apart, thereby releasing the connection of the first longitudinal portion 23 to the guide member 37, and at the same time fixing the position of the first longitudinal portion 23 with respect to the embroidery machine. Subsequently, the second longitudinal portion 25 moves away from the first longitudinal portion 23 in the first spatial direction. This situation takes place by means of a drive device which is operatively connected to the toothed rack 39 by means of a gear 38. The spacing between the first longitudinal portion 23 and the second longitudinal portion 25 increases until the desired fabric tensioning condition is reached. Subsequently, the bolt 53 moves back, thereby releasing the plate The connection of 43 and the plate again accommodates the guiding members 37 in a clamping manner between the plates. By the bolt 53 moving back, the connection between the first longitudinal portion 23 and the embroidery machine is also released, and the first longitudinal portion 23 and the second longitudinal portion 25 are thus movable relative to the embroidery machine, which is the subsequent embroidery process. Prerequisites. The illustrated drive unit 55 is constituted by a compressed air cylinder and constitutes a second fastening member 51 with a bolt 53. In the order shown, Figures 3a to 3d depict the configuration of the fabric tensioning device in the following process: placing the fabric (Fig. 3a), releasing the connection between the longitudinal portions 23 and 25 (Fig. 3b), and tightening the fabric (Fig. 3b) 3c), as well as embroidery (Fig. 3d).

Figure 4 shows a fabric tensioning device 21 comprising a sub-frame. Shown: first longitudinal portion 23 and second longitudinal portion 25; two side portions 27 and 29; associated fabric holder formed with clamping strips and having clamping elements 35 (in all cases, each The longitudinal part or the side part only indicates one clamping element); the drive means 55 for the bolt of the (second) fastening member; the drive means 63 and 73, which in each case are used for the longitudinal part 23, 25 or side Movement of the portions 27, 29 in the first spatial direction 61 and the second spatial direction 72; and shafts 65 and 75 that transmit torque to the racks 39 and 77 , the rack being mounted in a displaceable manner In the guides 69 and 79.

11‧‧‧Embroidery machine

13‧‧‧Mobile fabric roll holder

19‧‧‧Woven/fabric net

21‧‧‧Texture tensioning device

23‧‧‧First vertical part (front)

25‧‧‧second longitudinal part (post)

27‧‧‧First side part (left)

29‧‧‧Second side part (right)

31‧‧‧ fabric retainer

33‧‧‧ fabric support

35‧‧‧Clamping elements

37‧‧‧guide elements

38‧‧‧ Gears

39‧‧‧Racks

41‧‧‧First fastening member

43‧‧‧Clamp (plate shape)/board

45‧‧‧Spring elements

46‧‧‧Clamp or plate opening

47‧‧‧Retainer

51‧‧‧Second fastening member

53‧‧‧Bolts

55‧‧‧Drives for pins

61‧‧‧First space direction / first direction of movement

63‧‧‧Drives for movement in the first spatial direction

65‧‧‧Axis

69‧‧‧Rack guides

72‧‧‧Second space direction/second moving direction

73‧‧‧Drives for movement in the second spatial direction

75‧‧‧Axis

77‧‧‧Racks

79‧‧‧Rack guides

In the schematic, not to scale: Figure 1 shows a plan view of the embroidery machine; Figure 2 shows a front view of the embroidery machine of Figure 1; Figures 3a to 3d show a plurality of schematic views of the fabric tensioning process Side view Figure 4; and Figure 4 shows a perspective view of a fabric tensioning device including a sub-frame.

21‧‧‧Texture tensioning device

23‧‧‧First vertical part (front)

25‧‧‧second longitudinal part (post)

27‧‧‧First side part (left)

29‧‧‧Second side part (right)

35‧‧‧Clamping elements

39‧‧‧Racks

55‧‧‧Drives for pins

61‧‧‧First space direction / first direction of movement

63‧‧‧Drives for movement in the first spatial direction

65‧‧‧Axis

69‧‧‧Rack guides

72‧‧‧Second space direction/second moving direction

73‧‧‧Drives for movement in the second spatial direction

75‧‧‧Axis

77‧‧‧Racks

79‧‧‧Rack guides

Claims (16)

An embroidery machine having a fabric tensioning device (21) for tensioning and holding a fabric (19) to be embroidered, wherein: the fabric tensioning device (21) has at least a first longitudinal direction a portion (23) and a second longitudinal portion (25), the two longitudinal portions (23, 25) being arranged opposite each other and having a fabric holder (31) and between the two longitudinal portions (23, 25) The spacing can be varied to tension the fabric (19), the embroidery machine being characterized by varying the spacing between the first longitudinal portion (23) and the second longitudinal portion (25) The first longitudinal portion (23) may be fixed to the embroidery machine, and in the fixed state of the first longitudinal portion (23), the second longitudinal portion (25) may be in a first spatial direction ( 61) Move up. An embroidery machine according to the first aspect of the invention, characterized in that the first longitudinal portion (23) and the second longitudinal portion (25) are releasably connectable to each other, and for this, The fabric tensioning device (21) has a guiding member (37) connected to the second longitudinal portion (25), and the first longitudinal portion (23) is in the first spatial direction (61) Mounted on the guide member in a displaceable manner, wherein a first fastening member (41) is provided for releasably connecting the first longitudinal portion (23) to the guide member (37). An embroidery machine according to claim 2, characterized in that Providing a second fastening member (51) for releasably attaching the first longitudinal portion (23) to the embroidery machine to secure the first longitudinal portion (23) to the embroidery On the machine, the second fastening member (51) is configured to be in contact with the first fastening member (41) by means of the first fastening member (41) and the second fastening member ( a contact of 51), on the one hand, forming a connection between the first longitudinal portion (23) and the embroidery machine, thereby preventing the first longitudinal portion (23) from being in the first position relative to the embroidery machine Moving in the spatial direction (61), and on the other hand, releasing the connection between the guiding member (37) and the first longitudinal portion (23), so that the second longitudinal portion (25) is possible Moving in the first spatial direction (61) relative to the first longitudinal portion (23). The embroidery machine according to claim 3, wherein the second fastening member (51) is a bolt (53) fastened to the embroidery machine in a displaceable manner. The first fastening member (41) is a clamp (43) which, when in the first position, is pressed by the tension of the fabric (19) acting on the guide member (37), thereby achieving self-locking and preventing The first longitudinal portion (23) moves in the first spatial direction (61) relative to the second longitudinal portion (25), and the clamp (43) is engageable with the bolt (53) Transfer To a second position, wherein the clamp (43) is released by the guiding member (37) such that the first longitudinal portion (23) is likely to be at the first with respect to the second longitudinal portion (25) Moving in the spatial direction (61) and preventing the first longitudinal portion (23) from being opposite to the embroidery machine by means of contact of the bolt (53) with the clamp (43) in the second position Moving in the first spatial direction (61). An embroidery machine according to the first aspect of the invention, characterized in that the fabric tensioning device (21) has a first side portion (27) and a second side portion (29), wherein the first side portion (27) and the second side portion (29): disposed from the second longitudinal portion (25) to the first longitudinal portion (23); arranged to face each other; and having a fabric holder (31). The embroidery machine according to the fifth aspect of the invention is characterized in that the pitch of the side portions (27, 29) can be varied. An embroidery machine according to claim 6, wherein the first side is changed in order to change the spacing between the first side portion (27) and the second side portion (29) The portion (27) can be fixed to the embroidery machine, and in the fixed state of the first side portion (27), the second side portion (29) is movable in the second spatial direction (72). The embroidery machine according to item 7 of the patent application is characterized in that The two longitudinal portions (23, 25) and the two side portions (27, 29) are movable together in the first spatial direction (61) with respect to the embroidery machine and perpendicular to the embroidery Moving together in the second spatial direction (72) to embroider the fabric (19), providing a drive means (73) for embroidering the fabric (19) The two longitudinal portions (23, 25) and the two side portions (27, 29) move together in the second spatial direction (72), wherein: at the first side portion (27) In the fixed state, the second side portion (29) is movable in the second spatial direction (72) by means of the same drive means (73). The embroidery machine according to any one of claims 5 to 8, wherein in the fixed state of the first longitudinal portion (23) on the embroidery machine, the first The side portion (27) and the second side portion (29) are movable with the second longitudinal portion (25) in the first spatial direction (61) relative to the embroidery machine, wherein the The two longitudinal portions (25) and the first side portion (27) and the second side portion (29) are preferably rigidly connected to each other for this purpose. An embroidery machine according to any one of claims 5 to 8, characterized in that the fabric holder on the first side portion (27) and the second side portion (29) 31) is a clamping strip. An embroidery machine according to claim 10, characterized in that In all cases, the clamping strips each have a support (33) for the fabric (19) extending along the side portions (27, 29), and a clamping element (35), The clamping element (35) and the support (33) can receive the fabric (19) between them, the clamping element (35) surrounding the support (33) and thus the support The pieces cooperate in a clamping manner, wherein the movement of the fabric (19) perpendicular to the side portions (27, 29) is prevented by the cooperation of the clamping element (35) and the support (33) . The embroidery machine according to any one of claims 1 to 8, wherein the two longitudinal portions (23, 25) are engagable in the first spatial direction with respect to the embroidery machine (61) Moving together and moving together in the second spatial direction (72) perpendicular to the embroidery machine to embroider the fabric (19), providing a drive means (63) for the pair of fabrics (19) During the embroidery process, the two longitudinal portions (23, 25) are moved together in the first spatial direction (61), wherein in the fixed state of the first longitudinal portion (23) The second longitudinal portion (25) is movable in the first spatial direction (61) by means of the same drive means (63). An embroidery machine according to claim 9 of the patent application, characterized in that The two longitudinal portions (23, 25) are movable together in the first spatial direction (61) with respect to the embroidery machine and move together in the second spatial direction (72) perpendicular to the embroidery machine To embroider the fabric (19), a driving device (63) is provided to cause the two longitudinal portions (23, 25) to be in the process of embroidering the fabric (19) Moving together in a spatial direction (61), wherein in the fixed state of the first longitudinal portion (23), the second longitudinal portion (25) can be by the same drive means (63) Move in a spatial direction (61). The embroidery machine according to any one of claims 1 to 8, wherein the fabric holder (31) at the first longitudinal portion and the second longitudinal portion (25) is A clamping strip or roller for winding the fabric (19). A method for operating an embroidery machine having a fabric tensioning device (21) for tensioning and holding a fabric (19) to be embroidered, wherein the fabric tensioning device (21) has a first longitudinal portion (23) and a second longitudinal portion (25), the longitudinal portions being arranged opposite each other and releasably connected to each other, and having a fabric holder (31), the method comprising the following steps : placing the fabric (19) on the longitudinal portion (23, 25) and fastening the fabric (19) to the fabric holder (31), the first longitudinal portion ( 23) connecting to the embroidery machine, releasing the first longitudinal portion (23) and the second longitudinal portion (25) a connection between the second longitudinal portion (25) in a first spatial direction (61) relative to the first longitudinal portion (23), thereby increasing between the longitudinal portions (23, 25) Pitching, thereby tensioning the fabric (19), joining the first longitudinal portion (23) and the second longitudinal portion (25), releasing the first longitudinal portion (23) from the embroidery machine Connection. The method according to claim 15 of the invention, characterized in that, in order to embroider the fabric (19), the longitudinal portion (23, 25) is in the first spatial direction with respect to the embroidery machine ( 61) moving together and moving in a second spatial direction (72) perpendicular to the embroidery machine, wherein the second longitudinal portion (25) is oriented relative to the first by means of the same drive means (63) The longitudinal portion (23) is moved, and the first longitudinal portion (23) is coupled to the embroidery machine, and during the embroidering of the fabric (19), the first longitudinal portion (23) and The second longitudinal portion (25) moves in the first spatial direction (61) relative to the embroidery machine.