KR100463887B1 - Embroidery Machine - Google Patents

Abstract

The embroidery machine has machine frames 11 and 12 connected together at the top by struts 13 on both sides of the feed passage 15. On the machine frames 11 and 12, embroidery frames 21 and 23 are arranged, each of which has a web 25 and 27 of fabric. Each machine frame 11, 12 has a so-called needle assembly with a plurality of embroidery positions. A single control unit controls both halves of the embroidery machine. Since both halves of the embroidery machine are arranged in such a way that the vibration force generated by the moving object during the operation of the embroidery machine acts in the substantially opposite direction, the vibration force is transmitted to the machine frames 11 and 12 by the struts 13 and 14. Is offset by the connection of. During operation of the embroidery machine, the embroidery frames 21, 23 move vertically in the same direction and horizontally in opposite directions. In both embroidery frames, the embroidery design is the same.

Description

Embroidery Machines {Embroidery Machine}

The present invention provides two machine frames having a plurality of embroidery positions to which the embroidery frame and embroidery tool are coupled and connected together by connecting means, a feed passage located between the machine frames to provide access to the embroidery positions, and A embroidery machine including a drive means for manipulating an embroidery frame and an embroidery position, and a control unit for controlling the embroidery frame and the embroidery position.

The invention also provides a web of two or more fabrics by means of an embroidery machine comprising an embroidery frame with respect to the web of each fabric which is a stitch per stitch for a so-called needle assembly comprising a plurality of embroidery positions with embroidery tools. A method of simultaneously embroidering the same design on a dress.

More than 90 years of research has been conducted to increase the working capacity of embroidery machines. Longer embroidery machines have been manufactured. However, the longer the embroidery machine, the smaller the maximum allowable speed. Therefore, embroidery machines have been produced with a plurality of embroidery frames arranged side by side or parallel to each other up and down. This embroidery machine has the advantage that the same control unit can control all embroidery frames and embroidery tools. One example of such a first type of embroidery machine is disclosed in German Patent No. 227 838, German Patent No. 237 421, and US Patent No. 2,030,495. The patent publication discloses an embroidery machine having a flat embroidery frame arranged side by side in parallel. In the embroidery machine, one embroidery frame moves together with the web of fabric against the movement of the other embroidery frame. Such embroidery machines have not been commercially successful because of a number of disadvantages. An important drawback is that the design in one embroidery frame is rotated 180 ° relative to the design formed in the other embroidery frame. Other disadvantages are described below. In view of the shortcomings associated with the first type of embroidery machine described above, development in the direction of the second type of embroidery machine, that is, the two-layer embroidery machine, has occurred. Such embroidery machines have been known for a long time. The embroidery machine has a large frame for mounting two webs of fabric up and down relative to each other in the same plane and includes a so-called needle assembly having a plurality of rows of embroidery positions in front of each web of fabric. The movement of the embroidery tool on both layers is synchronous. On both webs of the fabric, the same design is embroidered simultaneously. For example, pages 211 and 312 of Scherner, Spitzen, Leipzig, published in 1980, disclose such a two-layer embroidery machine. The embroidery machine described as a high speed embroidery machine operates at a maximum speed of 170 rpm. A drawing of such a two-layer embroidery machine is also disclosed in EP 0 666 351 B1.

To access the embroidery position in the upper layer, the two-layer embroidery machine has an overpass with one or more steps extending to the front and rear, ie on the needle side and the shuttle side. In the two-layer embroidery machine, almost identical products can be obtained. Two-layer embroidery machines are substantially cheaper than two single-layer embroidery machines. In many cases, small floor area requirements are also important for the selection of two-layer embroidery machines. However, the advantages of the two-layer embroidery machine are offset by significant disadvantages. Working on a two-story embroidery machine is difficult in that the worker frequently has to climb up and down the stairs on each viaduct. The viaduct also prevents access to the lower row of embroidery positions. In particular, such embroidery machines have a disadvantage in that they tend to generate severe vibrations. This limits the maximum embroidery speed. The cause of the severe vibration is the size of the embroidery tool and the embroidery frame of twice the number. In addition, the high mechanical frame, through which the moving object transmits vibrational forces, forms an elongated lever extending upwards from the mounting in the foundation.

Another disadvantage of the two-layer embroidery machine is its relatively small embroidery height. Embroidery height is the vertical dimension by which embroidery is performed on the web of the fabric. It is suitable to increase the current embroidery height from 125 cm to at least 135 cm, suitably 165 cm. This requires a large and therefore heavy embroidery frame. An increase in embroidery height of about 20 cm requires an increase in the height of a two-layer embroidery machine of 40 cm or more. Thus, the machine frame is high and thus also the lever action on the force that generates vibration. To keep the vibrations within the limits, a structure of a correspondingly strong and heavy machine frame is required, but the structure of such machines is limited by the limits imposed by dimensions, loads, transport and costs. This means that the embroidery speed of a two-layer embroidery machine cannot be substantially increased beyond the current maximum speed of about 350 rpm in such embroidery machines. However, the single-layer embroidery machine currently on the market "Resser MD1 Multi Drive" already has a maximum speed of 600 rpm. Thus, the embroidery machine can already produce more than the two-layer embroidery machine.

The above-mentioned patent publication relating to an embroidery machine having two embroidery frames arranged side by side will be described in more detail.

German patent 237 421 discloses an embroidery machine having two embroidery frames, characterized in that they are in equilibrium with each other and each embroidery frame is driven directly by an automatic unit. Both embroidery frames have an end suspended on two belts extending over the gear segments, so that they can be balanced. Also in the horizontal direction the embroidery frame is connected by a belt. As calibrated in German Patent No. 227 838 by the same inventor, one embroidery frame with a web of fabric mounted thereon in this embroidery machine always generates opposing movement of the other embroidery frame, so that by means of the apparatus used to date Cannot boring or pricking on both embroidery frames at the same time. In order to solve this problem, various proposals have been made in the patent specification. According to one proposal, in one embroidery frame the borer is placed above the needle and the fricker is placed below the needle, in the other embroidery frame the borer is placed below the needle and the fricker is placed above the needle. However, this is an impractical solution requiring two different devices, and threading in one of the devices becomes very difficult.

In the embroidery machine according to German Patent No. 237 421 and German Patent No. 227 838, both embroidery frames are self-supporting. Thus, in the embroidery machine, an improvement in the vibrational behavior cannot be achieved. In contrast, US Pat. No. 2,030,495 has a common machine frame for two embroidery frames suspended in equilibrium by a belt. Feed passages are provided to allow supply on both shuttle sides. Since the needles are placed on the outside of the machine, the forces generated by the horizontally moving embroidery tools work against each other, so the embroidery machine can operate with little vibration and allow higher embroidery speeds than embroidery machines with only one embroidery frame. do.

In the embroidery machine according to US Pat. No. 2,030,495, the embroidery frame is suspended on the belt. In particular, the embroidery frame moves vertically in the opposite direction and horizontally in the same direction, the needles are arranged outside and the shuttle is arranged between two frames of the machine frame assembly.

In all the embroidery machines disclosed in the above-mentioned three patent publications, the two embroidery frames are suspended on the belt and are in equilibrium with each other, so that the other embroidery frames move upward during the downward movement of one embroidery frame. Thus, the design formed on the two embroidery frames is offset by 180 °. This requires a specific structure for boring and flicking of the embroidery machine, for example as proposed in German patent 227 838. However, it did not pass the test for practical application and such a machine was not manufactured.

It is an object of the present invention to provide an embroidery machine having the substantial advantages of a two-layer embroidery machine based on the prior art according to US Pat. No. 2,030,495, capable of operating at high speed and providing a relatively high embroidery height.

This object is achieved by the features of claim 1.

In the embroidery machine the same design is embroidered simultaneously in both embroidery frames. During operation of the embroidery machine, parallelly arranged embroidery frames tend to oscillate in directions opposite to each other. Since the machine frames are connected together, the vibration is substantially canceled out. In addition, although it is not possible to completely eliminate the vibration, it is possible to reduce the vibration substantially. This enables a higher speed operation of the embroidery machine than in a conventional single layer embroidery machine, and is substantially higher speed in a two layer embroidery machine. An important advantage compared to the two-layer embroidery machine is that the embroidery machine can be manufactured with a substantially high embroidery height. Moreover, the embroidery machine of the present invention has a cost advantage similar to that of the two-layer embroidery machine, since only one control unit is required for all embroidery frames and embroidery positions and one drive unit is sufficient to drive all embroidery positions. .

The feed passage provides access to the needle side or shuttle side. In contrast to a two-storey embroidery machine where the operator always has to climb up and down the stairs, the supply passage enables particularly efficient management and supervision of the embroidery machine. In addition, a symmetrical arrangement of both halves of the embroidery machine is obtained.

Since the machine frame is connected to the upper region by the struts, the forces generated by the vertical movement of the embroidery frame are substantially canceled out. In addition, a particularly rigid structure is obtained. Since a mechanical frame having a strut frame at its end is provided, the forces acting horizontally in different directions act against each other.

The present invention also relates to a method of simultaneously embroidering the same design on a web of two or more fabrics by an embroidery machine comprising a so-called stitch-movable embroidery frame for each web of fabric for a needle assembly. In the method of the invention, the embroidery frame moves in such a way that one movement component of one embroidery frame, ie the horizontal movement component, opposes the corresponding movement component of the other embroidery frame. In contrast, the vertical motion components are in the same direction. In other words, for example if one embroidery frame moves upward and to the left, the other embroidery frame also moves upward, but to the right.

1 is a vertical sectional view of an embroidery machine with a feed passage providing access to both halves of the embroidery machine on the needle side;

2 shows the form of a strut frame connecting the ends of the machine frame.

3 is a vertical sectional view of the embroidery machine with a feed passage providing access to both halves of the embroidery machine on the shuttle side.

4 is a vertical sectional view of an embroidery machine having four embroidery frames.

* Description of the symbols for the main parts of the drawings *

11, 12: machine frame 13: prop

15: supply passage 17, 19: needle assembly

21, 23: embroidery frames 25, 27: web of fabric

29: drive unit 31, 33: toothed belt

35, 37, 39, 41: drive shaft 43, 45: shuttle mechanism

The present invention will be described with reference to the examples.

1 schematically shows a shuttle embroidery machine comprising two machine frames 11, 12 connected together at the top by a strut 13. Feed passages 15 are arranged between the machine frames. So-called needle assemblies 17, 19 are located opposite each other and can be easily supplied from the supply passage 15. In contrast to the prior art, the feed passage provides access from the needle side to facilitate the management of the embroidery machine. Each needle assembly 17, 19 comprises a plurality of embroidery positions in a known manner. In each of the machine frames 11 and 12, the embroidery frames 21 and 23 are movable, respectively. Embroidery frames 21 and 23 are equipped with webs 25 and 27 of fabric, respectively. A common drive unit 29 is provided for the embroidery tool of the needle assembly 17, 19. Servo motors are suitably used as the drive unit. The toothed belts 31 and 33 drive the drive shafts 35 and 37 respectively in the needle assemblies 17 and 19 and the drive shafts 39 and 41 in the shuttle mechanisms 43 and 45 respectively. do. Instead of the common drive unit 29, separate servo motors may be used for each machine frame. In order to drive each embroidery frame 21, 23 in the vertical and horizontal directions, a servo motor (not shown) which is conventional in modern embroidery machines controlled by the control unit is also used.

During the operation of the embroidery machine, the upward and downward movement of the embroidery frames 21, 23 is synchronous. Since both embroidery frames 21 and 23 move simultaneously in the same vertical direction, the embroidery frames are due to their opposite positions in the machine frame, so that the machine frames face each other and are not connected by the struts 13 and It generates a force that generates a small tilting motion of the machine frames 11 and 12 spaced apart from each other. By the strut, the force generated by the vertical embroidery frame movement is substantially canceled out. This also applies to forces generated by moving objects in the needle assemblies 17, 19 and the shuttle mechanism 43, 45. Thus, the above-described configuration of the embroidery machine provides an operation without vibration at high speed of the embroidery machine.

During operation of the embroidery machine, the embroidery frames 21, 23 move horizontally in the opposite direction. As shown in FIG. 2, the ends of both machine frames are connected together by the strut assembly 14 in such a way that the forces acting in the longitudinal direction of the machine frame act against each other.

In Fig. 3 another embodiment is shown which differs from the embodiment of Fig. 1 in which needle assemblies 17 and 19 are arranged outside of the embroidery machine to allow the feed passage 15 to access the shuttle side.

As shown in Fig. 4, it is possible to double or triple the number of machine frames, embroidery frames and the like. The embroidery machine according to FIG. 4 corresponds to the combination of the embroidery machines of FIGS. 1 and 3 in its structure.

In a two-storey embroidery machine, an increase in the embroidery height may cause a problem that the height of the embroidery machine prevents the placement in the building. However, if the height of the space does not matter, the present invention can be used for a multi-layer embroidery machine. In such embroidery machines, the present invention is particularly advantageous because the elongated lever arms formed by the machine frame no longer cause disadvantages for vibrational behavior.

In summary.

The embroidery machine has machine frames 11, 12 connected together at the top by struts 13 on both sides of the feed passage 15. The machine frames 11 and 12 are arranged with embroidery frames 21 and 23, each having a web 25 and 27 of fabric. Each machine frame 11, 12 has a so-called needle assembly having a plurality of embroidery positions. A single control unit serves to control both halves of the embroidery machine. Since both halves of the embroidery machine are arranged in such a way that the vibration force generated by the moving object during the operation of the embroidery machine acts in the substantially opposite direction, the vibration force is transmitted to the machine frames 11 and 12 by the struts 13 and 14. ) Due to the connection of During operation of the embroidery machine, the embroidery frames 21, 23 move vertically in the same direction and horizontally in the opposite direction. Both embroidery frames have the same design.

According to the present invention, there is provided the embroidery machine and the embroidery method which have the substantial advantages of the two-layer embroidery machine, can operate at high speed, and provide a relatively high embroidery height, and the same design in the embroidery machine is embroidered simultaneously in both embroidery frames, During operation, vibrations can be substantially canceled out.

Claims (9)

Two machine frames (11, 12) having a plurality of embroidery positions to which embroidery frames (21, 23) and embroidery tools are connected and connected together by connecting means (13), and to provide access to the embroidery positions; In the embroidery machine comprising a supply passage 15 disposed between a machine frame, drive means for manipulating the embroidery frame and embroidery position, and a control unit for controlling the embroidery frame and embroidery position, And the driving means moves the two embroidery frames vertically in the same direction and horizontally in the opposite direction during operation of the embroidery machine. Embroidery machine according to claim 1, characterized in that the feed passage (15) provides access to the needle side. Embroidery machine according to claim 1, characterized in that the feed passage (15) provides access to the shuttle side. 4. Embroidery machine according to any one of the preceding claims, characterized in that the machine frame (11, 12) is connected in the upper region by a strut (13). 4. Embroidery machine according to any one of the preceding claims, characterized in that the machine frames (11, 12) are connected at their ends by strut frames (14). The embroidery machine according to claim 1, wherein the drive means for the embroidery frame is a servo motor. In the embroidery method for simultaneously embroidering the same design on a web of two or more fabrics by an embroidery machine comprising two embroidery frames arranged side by side, Embroidery method characterized in that during the embroidery movement of the two embroidery frames are generated in the same direction vertically and in the opposite direction horizontally. 8. Method according to claim 7, characterized in that the moving component of the embroidery tool of one needle assembly (17,19) is opposite to the moving component of the corresponding embroidery tool of the other needle assembly (19,17). 9. Embroidery according to claim 7 or 8, characterized in that the movement component of the shuttle mechanism 43 of one machine frame 11 opposes the movement component of the shuttle mechanism 45 of another machine frame 12. Way.