JPH0646676U - Multi-needle embroidery sewing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a suitable configuration for erecting a thread spool for supplying an upper thread to a sewing needle of each needle bar. [Constitution] Multiple needle bars (5a) with sewing needles attached to the lower end
A needle bar case (5) that is freely movable up and down, and slide the needle bar case in a direction orthogonal to the needle bar to drive one of the plurality of needle bars. In a multi-needle type embroidery sewing machine provided with a needle bar changing device (7) placed opposite to each other, a thread stand capable of standing a plurality of thread spools (25) wound with needle threads supplied to the sewing needles of the respective needle bars. The dish (22) is supported above the needle bar case so that it can move freely in a direction parallel to the sliding direction of the needle bar case, and when the needle bar case slides, the thread stand plate slides with the needle bar case. It is configured to do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-needle type embroidery sewing machine having a plurality of needle bars, and more specifically, a multi-needle type embroidery sewing machine provided with a structure for raising a thread spool for supplying a needle thread to a sewing needle of each needle bar. It's about Shin.

[0002]

[Prior art]

 In the multi-needle type embroidery sewing machine, a so-called needle bar case having a plurality of vertically driven needle bars is laterally slidably mounted on the front part of the needle bar drive unit. Then, by sliding this needle bar case, the needle bar on which the desired color thread is applied is selected, and by driving only the selected needle bar, the color of the embroidery thread can be changed. .

[0003] The needle thread of each color is supplied to each needle bar via the corresponding thread tension device. Then, the upper thread is fed from each thread spool erected on a thread stand plate installed above the needle bar case.

[0004]

[Problems to be solved by the device]

 When changing colors, the needle bar case is slid as described above, but the thread stand on which each color piece stands is fixed and does not slide. For this reason, the thread is delivered from each thread spool along with the slide of the needle bar case, and while the color change (that is, the operation of sliding the needle bar case) is repeated, the thread delivered from each thread spool Will be loosened. Then, even in the needle bar in the non-selected state, the balance is driven up and down, so that the loosened yarn is entangled with the balance and thread breakage occurs.

[0005]

[The purpose of the device]

 The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the multi-needle type embroidery sewing machine according to the prior art, and supplies an upper thread to the sewing needle of each needle bar. It is an object of the present invention to provide a suitable structure for raising a thread spool.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems and achieve the intended purpose, the present invention provides a needle bar case in which a plurality of needle bars having sewing needles attached to their lower ends are supported in a vertically movable manner, and the needle bar case is In a multi-needle type embroidery sewing machine provided with a needle bar changing device that slides in a direction orthogonal to the needle bar to position one of the plurality of needle bars at a driven position. A thread stand tray capable of standing a plurality of thread spools around which the upper thread supplied to the sewing needle of each needle bar is erected freely above the needle bar case in a direction parallel to the sliding direction of the needle bar case. However, when the needle bar case is slid, the thread stand plate is slid together with the needle bar case.

[0007]

[Action]

 When the needle bar case is slid for color change, the thread stand plate slides with the needle bar case.

[0008]

【Example】

 A preferred embodiment in which the present invention is applied to a multi-needle multi-head embroidery sewing machine will be described below with reference to the accompanying drawings. FIG. 1 shows the appearance of a multi-needle, multi-head embroidery sewing machine according to this embodiment. A total of ten sewing heads are provided in front of a frame 2 which is arranged above and in parallel with a horizontal sewing machine table 1. 3 are arranged at equal intervals.

Each sewing machine head 3 comprises a sewing machine arm 4 fixed to the front surface of the frame 2 and a needle bar case 5 mounted on the front surface so as to be freely slidable in the lateral direction. The connecting rod 6 is connected to the needle bar changing device 7 at the right end (in the figure) of the connecting rod 6. Each needle bar case 5 supports a total of nine needle bars 5a with sewing needles fixed at the lower end so that it can move up and down freely, and a balance 5b corresponding to each needle bar 5a is supported so as to move up and down freely. ing.

The needle bar changing device 7 converts the rotation of the geared motor 8 driven in response to a required needle bar selection signal into the lateral movement of the connecting rod 6, and the needle bar selection signal When input, each needle bar case 5 is slid through the connecting rod 6, whereby the needle bar 5a corresponding to the needle bar selection signal is selected in each needle bar case 5.

A sewing machine main shaft 10 extends through each of the sewing machine arms 4, and an output of a motor 11 fixed to the lower side of the sewing machine table 1 through a timing belt (not shown) at the left end thereof. It is connected to the shaft. When the sewing machine main shaft 10 is rotationally driven by the motor 11, the selected needle bar is reciprocally driven up and down via the conversion mechanism in each sewing machine arm 4, and the balance 5b corresponding to the needle bar 5a is moved. It is also designed to be reciprocally driven up and down. A well-known hook drive mechanism using the above-mentioned motor 11 as a drive source is disposed on the lower surface of the sewing machine table 1 below the sewing machine heads 3, and the lock stitch is performed in cooperation with the needle bar 5a and the balance 5b. Embroidery sewing is performed by.

On the other hand, the embroidery frame 12 placed on the sewing machine table 1 is a known original frame for tensioning an original cloth to be embroidered and is arranged on the lower surface of the sewing machine table 1. The X-direction driving unit and the Y-direction driving unit are driven according to required embroidery data, that is, the X-direction and Y-direction driving units are driven in synchronization with the motor 11 according to the embroidery data. As a result, the embroidered cloth is embroidered according to the embroidery data.

In the present embodiment, an adjustment table 21 and a thread stand 22 are attached to each sewing machine head 3. As shown in detail in FIG. 4, this adjusting base 21 is provided with nine well-known thread tensioners 21 and thread guides 21b corresponding to each needle bar 5a on the front surface, for a total of nine needle bar cases 5 each. It is fixed to the upper surface of the needle and slides sideways together with the needle bar case 5 when changing colors.

Next, the thread stand plate 22 will be described with reference to FIGS. 2 to 6. On the upper surface of the frame 2, a linear guide 23 corresponding to each sewing machine arm 4 is fixed in parallel with the sliding direction of the needle bar case 5, and on the upper surface of another linear bearing 24 fitted to this linear bearing 23, A thread stand plate 22 is attached. This allows the thread stand 22 to move in a direction parallel to the sliding direction of the needle bar case 5. The upper surface of the thread stand plate 22 has a space for standing a total of nine thread spools 25 corresponding to the number of the needle bars 5a of the needle bar case 5 in front and rear two rows. A total of nine well-known thread stand bars 22a for controlling the position are erected on the thread stand tray 22.

Further, the thread stand plate 22 is provided with a thread guide body 26 for guiding the threads unwound from the thread spools 25 to the adjusting base 21, respectively. The thread guide 26 includes a yarn path portion 26a corresponding to a position directly above the thread spool 25 in the rear one row on the thread stand tray 22, a thread path portion 26b corresponding to a position directly above the thread spool 25 in the front row, and the adjusting table 21. The thread guide portion 26c has a corresponding thread path portion 26c immediately above the thread guide 21b, and is supported by support columns 26d that are erected at the front end portions of the thread stand tray 22 respectively. As shown in FIG. 2, the yarns that have been laid up on the yarn stand tray 22 and then unwound from the respective thread spools 25 are passed through the respective threading holes 26e of the thread passage portions 26a, 26b and 26c, respectively, as shown in FIG. The yarn guided to the adjusting table 21 and unwound from each thread spool 25 in the front row is guided to the adjusting table 21 by passing through the threading holes 26e of the yarn path portions 26b and 26c, respectively. There is. The thread stand plate 22 is connected to the needle bar case 5 by connecting stays 27 attached by screws 28 on both sides of the upper part of the needle bar case 5. As a result, when the needle bar case 5 is slid during color change, the thread stand plate 22 also slides on the frame 2 together with the needle bar case 5.

Next, the operation of this embodiment will be described. When the color of the needle bar case 5 is changed, the needle bar case 5 is slid between the left end position shown by solid lines in FIGS. 5 and 4 and the right end position shown by phantom lines in FIGS. One needle bar to be selected is selected. However, in this embodiment, since the needle bar case 5 of the thread stand tray 22 slides together, even if the needle bar case 5 is slid during color change, the thread stand tray 22 and the needle bar case 5 are There is no relative displacement between the two. Therefore, unlike the conventional device, it is possible to prevent the yarn between the needle bar case 5 and the thread stand 22 from slackening at the time of color change, resulting in a yarn breakage. Although the thread stand tray 22 is connected to the needle bar case 5 in this embodiment, it may be connected to the connecting rod 6 instead of the needle bar case 5.

[0017]

[Effect of device]

 As is apparent from the above description, according to the present invention, the thread stand plate in the embroidery sewing machine slides with the needle bar case when it slides, so that the thread bar and the needle bar case are separated by the slide of the needle bar case. There is no slack in the intervening thread, and this does not cause thread breakage.

Further, as the multi-needle type embroidery sewing machine, there is a multi-needle type multi-head type as shown in the embodiment, in which the number of needle bars supported by the needle bar case, the number of sewing machine heads, There are various combinations depending on the distance (head pitch) between adjacent sewing machine heads. When the thread stand is of the conventional type, it must be designed for each combination, whereas the thread stand according to the present invention has a different number of needles (3). By preparing the types that correspond to (12) to (12), it is possible to flexibly deal with the difference in the number of sewing machine heads and head pitch. That is, so-called unitization becomes possible, and secondary effects such as easy production control and inventory control of the embroidery sewing machine are exhibited.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a multi-needle, multi-head embroidery sewing machine according to the present embodiment.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged vertical sectional view of FIG.

FIG. 4 is a front view of the sewing machine head.

FIG. 5 is a plan view of the sewing machine head.

FIG. 6 is a plan view of the sewing machine head.

[Explanation of symbols]

 5 Needle bar case 5a Needle bar 6 Connecting rod 7 Needle bar changing device 22 Thread stand 23 Linear guide 24 Slide bearing 25 Thread spool

Claims (1)

[Scope of utility model registration request] 1. A needle bar case in which a plurality of needle bars each having a sewing needle attached to a lower end thereof are supported so as to be vertically movable, and the needle bar case is slid in a direction orthogonal to the needle bar, and the plurality of needle bars are slid. In a multi-needle type embroidery sewing machine including a needle bar changing device for positioning one of the needle bars in a driven position, a plurality of needle threads supplied to sewing needles of each needle bar are wound. A thread stand tray capable of standing a thread spool of the needle bar case is movably supported in a position parallel to the sliding direction of the needle bar case at a position above the needle bar case, and when the needle bar case is slid, the thread stand tray is A multi-needle embroidery sewing machine characterized by being configured to slide together with a needle bar case.