TWI775849B - Method for producing a seam end bottom thread with a target seam protrusion, and sewing machine - Google Patents

Method for producing a seam end bottom thread with a target seam protrusion, and sewing machine Download PDF

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Publication number
TWI775849B
TWI775849B TW107115290A TW107115290A TWI775849B TW I775849 B TWI775849 B TW I775849B TW 107115290 A TW107115290 A TW 107115290A TW 107115290 A TW107115290 A TW 107115290A TW I775849 B TWI775849 B TW I775849B
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Taiwan
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seam
sewing
thread
stitch
feed plate
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TW107115290A
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Chinese (zh)
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TW201900973A (en
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傑德 蘭格列克
喬哈勤 史密德
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德商都寇帕鷹股份有限公司
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Prior to producing a seam end bottom thread with a target seam protrusion of at most 10 mm a lower feed plate (17) is repositioned from a sewing operation position into a cut-off position displaced relative to the sewing operation position along a sewing direction (x) prior to cutting off a bottom thread (35) at one end of a seam. The bottom thread (35) is then cut off at the end of the seam. A sewing machine for carrying out this method has a controller for controlling a displacement drive, which is designed in such a way that it controls the displacement drive for displacing the lower feed plate (17) from the sewing operation position into the cut-off position in a synchronised way at the end of a seam production. This results in a production method for a seam end bottom thread with a pre-determined target seam protrusion, where the seam end bottom thread, and therefore also the target seam protrusion, can be designed to be shorter.

Description

具有目標線縫突伸部的線縫端部底線的產生方法和縫紉機 Method and sewing machine for producing seam end bottom thread with target seam protrusion

本發明要求德國專利申請DE 10 2017 207 626.7的優先權，我們將該德國專利申請的內容結合在此作為參考。 The present invention claims priority from the German patent application DE 10 2017 207 626.7, the content of which is hereby incorporated by reference.

本發明涉及一種用於產生具有預定目標線縫突伸部的線縫端部底線的方法。本發明進一步涉及一種用於執行這種方法的縫紉機。 The present invention relates to a method for producing a seam end bobbin having a predetermined target seam protrusion. The invention further relates to a sewing machine for carrying out such a method.

從EP 1 847 641 B1和EP 2 330 241 B1已知一種縫紉機，利用這種縫紉機可以產生具有預定目標線縫突伸部的線縫端部底線。 From EP 1 847 641 B1 and EP 2 330 241 B1 a sewing machine is known, with which a seam end bobbin thread with predetermined target seam projections can be produced.

本發明的一個目的是開發一種用於產生具有預定目標線縫突伸部的線縫端部底線的方法，使得線縫端部底線以及因此目標線縫突伸部可以被設計得更短。 It is an object of the present invention to develop a method for producing a seam end bobbin with a predetermined target seam protrusion so that the seam end bobbin and thus the target seam protrusion can be designed to be shorter.

根據本發明，這個目的通過一種利用如下步驟產生具有至多10mm的目標線縫突伸部的線縫端部底線的方法來實現：縫合線縫；當在線縫的一個端部切斷底線 之前將下部送料板從縫合操作位置重新定位到切斷位置，該切斷位置相對於縫合操作位置沿著縫合方向移位；以及在線縫端部切斷底線。 According to the present invention, this object is achieved by a method of producing a seam end bobbin with a target seam protrusion of at most 10 mm using the steps of: stitching the seam; when cutting the bobbin at one end of the seam The lower feed plate was previously repositioned from the stitching operation position to a cutting position displaced in the stitching direction relative to the stitching operation position; and the bobbin thread was cut at the end of the seam.

根據本發明已經發現，下部送料板的位置可以在形成線縫之後且在線縫端部切斷底線之前移位，使得可以縮短線縫的最後一個線跡與切斷位置之間的底線路徑。這導致線縫端部底線的相應縮短。由於在切斷位置下部送料板的位置可明確限定，所以可以精確地再現這種縮短，從而根據下部送料板的位置產生預定目標線縫突伸部。在產生具有目標線縫突伸部的線縫端部底線的同時，還可以產生具有例如不超過10mm的類似目標線縫突伸部的線縫端部上線。利用這種產生方法，上線可以與底線同時被切斷。那麼，將下部送料板從縫合操作位置重新定位到切斷位置可以在切斷上線之前縮短線縫的最後一個線跡與切斷位置之間的上線路徑，這導致線縫端部上線的相應縮短。因此，根據下部送料板的位置，產生線縫端部上線的相應可預定的目標線縫突伸部。將下部送料板相應地重新定位到切斷位置，此時線縫的最後一個線跡與切斷位置之間的底線路徑和/或上線路徑被延伸，所以還可以產生具有例如明顯超過10mm的延伸的目標線縫突伸部的線縫端部底線和/或線縫端部上線。這對於需要較長線縫端線的某些縫合任務來說可能是很有意義的。下部送料板可以是送料牙或布料推進器。下部送料板可以與縫紉機的線跡形成工具(即縫紉針和夾線器)同步和/或可以週期性地工作。下 部送料板表示從下方通過摩擦式接觸沿著縫合方向運送縫製布料的部件。這裡，下部送料板在第一時間段內在縫紉期間與縫製布料接合，而在另一個時間段內不與縫製布料接合。 It has been found in accordance with the present invention that the position of the lower feed plate can be shifted after the seam is formed and before the bobbin thread is cut at the end of the seam, so that the bobbin thread path between the last stitch of the seam and the cut position can be shortened. This results in a corresponding shortening of the bottom thread at the seam end. Since the position of the lower feed plate in the cut-off position can be well defined, this shortening can be reproduced precisely, resulting in predetermined target seam protrusions depending on the position of the lower feed plate. At the same time as producing a seam end bottom thread with a target seam protrusion, it is also possible to produce a seam end upper thread with a similar target seam protrusion of, for example, no more than 10 mm. With this production method, the upper thread can be cut at the same time as the lower thread. Then, repositioning the lower feed plate from the stitching operating position to the cutting position can shorten the thread path between the last stitch of the seam and the cutting position before cutting the thread, which results in a corresponding shortening of the thread at the end of the seam . Accordingly, depending on the position of the lower feed plate, corresponding predeterminable target seam projections of the thread ends of the seam ends are produced. The lower feed plate is accordingly repositioned to the cutting position, where the lower thread path and/or the upper thread path between the last stitch of the seam and the cutting position is extended, so that it is also possible to produce extensions with e.g. significantly more than 10 mm The seam end bottom thread and/or the seam end upper thread of the target seam protrusion. This may make sense for certain stitching tasks that require longer seam ends. The lower feed plate can be a feed dog or cloth pusher. The lower feed plate can be synchronized with the stitch forming tools of the sewing machine (ie the sewing needles and the thread clamps) and/or can be operated periodically. Down The upper feed plate represents the part that feeds the sewing fabric from below by frictional contact in the sewing direction. Here, the lower feed plate is engaged with the sewing fabric during sewing in a first time period, and is not engaged with the sewing fabric during another time period.

在縫合期間在切斷之前具有縮短的線跡長度的線跡意味著通過切斷產生的線縫端部底線以及線縫端部上線從縫製布料到切斷位置的距離相對較長，並且因而由於最後較短的線跡，它們實際上具有相同的長度。 A stitch having a shortened stitch length before cutting during sewing means that the seam end bottom thread and the seam end upper thread produced by cutting are relatively long distances from the sewing fabric to the cutting position, and thus due to Shorter stitches at the end, they are actually the same length.

在將下部送料板在縫合方向移位之前將其重新定位可以導致根據縫紉機的設計有利地縮短最後一個線跡與切斷位置之間的底線路徑。可以選擇”回針”位置作為下部送料板的切斷位置。 Repositioning the lower feed plate before displacing it in the stitching direction can result in an advantageous shortening of the bobbin thread path between the last stitch and the cut-off location depending on the design of the sewing machine. The "back stitch" position can be selected as the cut-off position of the lower feed plate.

下部送料板的重新定位可以與縫紉機的正常操作相結合，所述下部送料板的重新定位通過控制送料板傳動機構的用於下部送料板的運送長度的調節裝置來實現。那麼，可以省略附加的重新定位驅動器。 The repositioning of the lower feed plate can be combined with the normal operation of the sewing machine by controlling the adjustment means for the transport length of the lower feed plate of the feed plate transmission. Then, the additional relocation driver can be omitted.

本發明的另一個目的是提供一種用於執行根據本發明所述的方法的縫紉機。 Another object of the present invention is to provide a sewing machine for carrying out the method according to the present invention.

根據本發明，這個目的通過用於執行根據本發明所述的方法的縫紉機來實現，所述縫紉機包括：利用上線和底線縫合線縫的線跡形成工具；可沿著縫合方向移位的下部送料板；用於線上縫端部切斷底線的拉線刀；用於使下部送料板沿著縫合方向移位的驅動器；用於控制移位驅動器的控制器，其中控制器被設計成使得其在線縫產 生結束時以同步方式控制移位驅動器，使得下部送料板從縫合操作位置移位到切斷位置。 According to the invention, this object is achieved by a sewing machine for carrying out the method according to the invention, said sewing machine comprising: a stitch forming tool for sewing seams with upper and lower threads; a lower feed which is displaceable in the sewing direction plate; thread-pulling knife for cutting the lower thread at the seam end of the thread; a drive for displacing the lower feed plate in the sewing direction; a controller for controlling the displacement drive, wherein the controller is designed such that it is in-line sewing At the end of the production, the displacement drives are controlled in a synchronous manner, so that the lower feed plate is displaced from the sewing operation position to the cutting position.

該縫紉機的優點與上面參考根據本發明所述的方法已經描述的那些優點相同。用於使下部送料板移位的驅動器則可以構成送料板傳動機構的調節裝置。 The advantages of this sewing machine are the same as those already described above with reference to the method according to the invention. The drive for displacing the lower feed plate can then form an adjustment device for the feed plate drive.

用於控制移位驅動器的控制器可以被設計成用於編程在線縫端部的設定的多餘的底線的長度。多餘的底線的長度可以通過縫紉機上的操作元件預先選定。 The controller for controlling the displacement drive may be designed to program the length of the set excess bobbin thread at the seam end. The length of the excess bobbin thread can be preselected via the operating elements on the sewing machine.

用於設定下部送料板的運送長度的線跡設定傳動機構特別適合作為用於將下部送料板從縫合操作位置重新定位到切斷位置的移位驅動器。特別地，線跡設定傳動機構可以被設計為爪式傳動機構(tab gear)。從EP 2 330 241 B1已知這種合適的線跡設定傳動機構。 The stitch setting drive for setting the transport length of the lower feed plate is particularly suitable as a displacement drive for repositioning the lower feed plate from the stitching operating position to the cutting position. In particular, the stitch setting gear can be designed as a tab gear. Such a suitable stitch setting drive is known from EP 2 330 241 B1.

移位驅動器的用於線跡設定傳動機構的線跡設定軸的旋轉驅動器構成用於將下部送料板從縫合操作位置重新定位到切斷位置的特別簡單的驅動器。旋轉驅動器可以被設計為步進馬達。可選地，旋轉驅動器可以被設計為線性電磁閥(linear solenoid)或氣壓缸。旋轉驅動器可以與至少一個止動器相配合以設定至少一個下部送料板位置。所述止動器可以是可調節的。也可以設想幾個這樣的止動器。 The rotary drive of the displacement drive for the stitch setting shaft of the stitch setting drive constitutes a particularly simple drive for repositioning the lower feed plate from the sewing operating position to the cutting position. The rotary drive can be designed as a stepper motor. Alternatively, the rotary drive can be designed as a linear solenoid or a pneumatic cylinder. The rotary drive may cooperate with the at least one stop to set the at least one lower feed plate position. The stop may be adjustable. Several such stops are also conceivable.

1:縫紉機 1: sewing machine

2:基板 2: Substrate

3:支架 3: Bracket

4:臂 4: Arm

5:機頭 5: nose

6:臂軸 6: Arm shaft

7:曲柄驅動器 7: Crank drive

8:導線桿 8: Conductor rod

9:針桿 9: Needle bar

10:針 10: Needle

11:軸線 11: Axis

12:線軸 12: Spool

13、35:線 13, 35: Line

14:支撐板 14: Support plate

15:布料部分 15: Fabric part

16:凹部 16: Recess

17:送料牙/布料推進器/下部送料板 17: Feed dog / cloth pusher / lower feeding plate

17a:壓腳 17a: Presser foot

18:線跡孔 18: Stitch hole

18a:移位驅動器 18a: Shift drive

18b:控制器 18b: Controller

19:夾線器 19: Wire Clamp

20:夾線器本體 20: Thread gripper body

21:夾線器尖端 21: Thread gripper tip

22:壺形線軸殼體 22: Pot-shaped spool housing

23:夾線器軸線 23: Thread gripper axis

24:操作旋轉方向 24: Operate the rotation direction

25:軸 25: Shaft

26:軸承座 26: Bearing seat

27:驅動軸 27: Drive shaft

28:皮帶驅動器 28: Belt Drive

29:拉線刀 29: Thread-pulling knife

30:旋轉軸線 30: Rotation axis

32:槽底側邊緣 32: Bottom side edge of groove

31:收線槽 31: take-up slot

32、34:邊緣 32, 34: Edge

32a:基體 32a: Matrix

32b:邊緣部分 32b: Edge section

32c:自由端部分 32c: Free end part

33:對置刀片 33: Opposite Blades

34:對置刀片邊緣 34: Opposite Blade Edges

36:送料板支撐件 36: Feeder plate support

37:送料板軸 37: Feeder plate shaft

38:送料板升降軸 38: Feeding plate lifting shaft

39:送料板部分 39: Feeder plate part

40:線縫 40: seam

41:線縫端部底線 41: Bottom thread at seam end

S1至S5:線跡 S 1 to S 5 : Stitches

x、y、z:方向 x, y, z: direction

現在將參照附圖描述本發明的實施例。附圖顯示了： 圖1是雙線鏈式線跡縫紉機的正視圖；圖2是與圖1中的箭頭II相對應的、以放大的比例示出的縫紉機的一部分的俯視圖；圖3是與圖1中的箭頭III相對應的、以放大的比例示出的縫紉機的一部分的內部細節的正視圖；圖4是拉線刀的透視示意圖；圖5是沿著圖1中的線V-V的、在根據現有技術在線縫的一個端部切斷的底線以產生具有目標線縫突伸部的線縫端部底線時下部送料板和拉線刀的當前位置的截面圖；圖6以類似於圖5的示意圖示出的、在線縫端部切斷底線以產生具有不超過10mm的目標線縫突伸部的線縫端部底線時下部送料板和拉線刀的當前位置的示意圖；以及圖7是利用縫紉機縫製的線縫的示意性俯視圖，用於說明所產生的具有設定目標線縫突伸部的線縫端部底線。 Embodiments of the present invention will now be described with reference to the accompanying drawings. The attached figure shows: Fig. 1 is a front view of a double-thread chain stitch sewing machine; Fig. 2 is a top view of a portion of the sewing machine corresponding to arrow II in Fig. 1 and shown on an enlarged scale; FIG. 4 is a schematic perspective view of the thread-pulling knife; FIG. 5 is along the line V-V in FIG. 1, at the line according to the prior art Cross-sectional view of the current position of the lower feeder plate and thread-pulling knife when sewing a bobbin thread cut at one end to produce a seam end bobbin thread with a target seam protrusion; FIG. 6 is shown in a schematic view similar to FIG. 5 Figure 7 is a schematic diagram of the current position of the lower feed plate and the thread-pulling knife when the bobbin thread is cut at the seam end to produce a seam end bobbin with a target seam protrusion of not more than 10 mm; and FIG. 7 is sewing with a sewing machine Schematic top view of the seam to illustrate the resulting seam end bottom thread with set target seam protrusions.

縫紉機1(特別被設計為雙線鏈式線跡縫紉機)具有基板2，以及具有從基板2向上延伸的支架3和成角度的臂4。成角度的臂4終止於機頭5。臂軸6可旋轉地安裝在臂4中。這通過機頭5中的導線桿8驅動曲柄驅動器7。曲柄驅動器7與可軸向移位地安裝在機頭5中的針桿9驅動連接。在針桿9下端具有針10。針10可以通過曲柄驅動器7在豎直軸線11上上下移動。針10經由線預拉緊裝置和導線桿8將通過線軸12供應的針線13保持在針眼中，所述針線13也被稱為上線。 The sewing machine 1 (specifically designed as a double thread chain stitch sewing machine) has a base plate 2, and has a bracket 3 and an angled arm 4 extending upwardly from the base plate 2. The angled arm 4 terminates in the handpiece 5 . The arm shaft 6 is rotatably mounted in the arm 4 . This drives the crank drive 7 through the wire rod 8 in the handpiece 5 . The crank drive 7 is in driving connection with a needle bar 9 mounted in the handpiece 5 so as to be axially displaceable. A needle 10 is provided at the lower end of the needle bar 9 . The needle 10 can be moved up and down on the vertical axis 11 by the crank drive 7 . The needle 10 holds the needle thread 13, also called upper thread, supplied through the spool 12 in the eye of the needle via the thread pretensioner and the thread guide 8.

基板2承載用螺釘固定的支撐板14，雙層縫製布料部分15位於該支撐板14上。支撐板14被設計成具有凹部16，用於穿過送料牙或布料推進器17(也被稱為下部送料板)。後者具有用於穿過針10的線跡孔18。 The base plate 2 carries a screw-fixed support plate 14 on which the double-stitched cloth portion 15 is located. The support plate 14 is designed with recesses 16 for passing through the feed dog or cloth pusher 17 (also referred to as the lower feed plate). The latter has a stitch hole 18 for passing through the needle 10 .

布料推進器17相對於縫製布料部分15佈置在壓腳17a的對面。 The cloth pusher 17 is arranged on the opposite side of the presser foot 17 a with respect to the sewing cloth portion 15 .

使用笛卡爾xyz坐標系來說明之後的位置關係。沿著縫合方向延伸的方向x垂直於圖1中的繪圖平面延伸並且延伸到繪圖平面中。在圖1中，方向y延伸到左側。在圖1中，軸線11沿著其延伸的方向z向上延伸。在縫合過程中，布料推進器或下部送料板17沿著縫合方向在正x方向上運送縫製布料部分15。 Use the Cartesian xyz coordinate system to illustrate the positional relationship later. The direction x extending along the stitching direction extends perpendicular to and into the drawing plane in FIG. 1 . In Figure 1, the direction y extends to the left. In Figure 1, the axis 11 extends upwards along the direction z in which it extends. During the sewing process, the fabric pusher or lower feed plate 17 conveys the sewing fabric portion 15 in the positive x-direction along the sewing direction.

布料推進器17與佈置在基板2下方的推進和升降傳動機構驅動連接。用於下部送料板17的這種傳動機構可以被設計為線跡設定傳動機構，並且特別地設定為如EP 2 330 241 B1中描述的爪式傳動機構。這種線跡設定傳動機構構成送料板傳動機構，特別地，利用該線跡設定傳動機構可以調節下部送料板17的運送長度，即線縫產生期間的線跡長度。線跡設定傳動機構是用於將下部送料板17沿著縫合方向x移位的驅動器的一部分。在圖1中，移位驅動器以18a示意性地示出。移位驅動器18a與圖1中示意性示出的中央控制器18b相配合，非常類似於縫紉機1的其它從動部件。為此，控制器18b以這裡未說明的方式與將被控制的縫紉機1的這些部件直接連接，特別是與移位驅 動器18a直接連接。用於線跡設定傳動機構的線跡設定軸的旋轉驅動器是移位驅動器18a的一部分。特別地，結合EP 2 330 241 B1的圖2對這種線跡設定軸進行了描述，我們在此引用EP 2 330 241 B1的內容。根據線跡設定軸的旋轉角度，得到線跡長度和下部送料板17沿著x方向相對於縫紉機1的與基板連接的部件的相對位置。因此，旋轉驅動器是線跡設定傳動機構的用於下部送料板17的運送長度的調節裝置。 The cloth pusher 17 is drivingly connected with a push and lift transmission mechanism arranged below the base plate 2 . Such a transmission for the lower feed plate 17 can be designed as a stitch setting transmission, and in particular as a claw transmission as described in EP 2 330 241 B1. Such a stitch setting transmission mechanism constitutes a feed plate transmission mechanism with which, in particular, the conveyance length of the lower feed plate 17, ie, the stitch length during seam creation, can be adjusted. The stitch setting drive is part of the drive for displacing the lower feed plate 17 in the stitching direction x. In Fig. 1 the displacement drive is shown schematically at 18a. The displacement drive 18a cooperates with the central controller 18b shown schematically in FIG. 1 , very similar to the other driven components of the sewing machine 1 . For this purpose, the controller 18b is connected directly with these components of the sewing machine 1 to be controlled, in particular with the displacement drive, in a manner not described here. The actuator 18a is directly connected. The rotary drive for the stitch setting shaft of the stitch setting gear is part of the displacement drive 18a. Such a stitch setting axis is described in particular in connection with Fig. 2 of EP 2 330 241 B1, the contents of which we cite here. According to the rotation angle of the stitch setting shaft, the stitch length and the relative position of the lower feed plate 17 along the x-direction with respect to the parts of the sewing machine 1 connected to the base plate are obtained. Therefore, the rotary drive is an adjustment device for the conveying length of the lower feed plate 17 of the stitch setting transmission.

具有夾線器本體20的夾線器19位於支撐板14下方，所述夾線器本體20具有夾線器尖端21。用於接收夾線器線存儲的壺形線軸殼體22容納在夾線器本體20中。夾線器線在下文也被描述為底線。 Below the support plate 14 is a thread gripper 19 having a thread gripper body 20 with a thread gripper tip 21 . A pot-shaped spool housing 22 for receiving the gripper wire storage is housed in the gripper body 20 . The thread gripper thread is also described below as the bottom thread.

夾線器19可以圍繞豎直夾線器軸線23旋轉。縫合操作旋轉方向24圍繞沿圖2中的方向z延伸的夾線器軸線23沿順時針方向延伸。夾線器本體20與軸25永久連接，軸25與夾線器軸線23同軸延伸。軸25可旋轉地安裝在軸承座26中，軸承座26旋擰到基板2上。與傳動機構驅動器連接的驅動軸27佈置在軸承座26內。傳動機構驅動器的傳動比為1：2，從而使得驅動軸27的一次旋轉使位於軸25上的夾線器本體20旋轉兩次。驅動軸27經由皮帶驅動器28與臂軸6可驅動地連接。 The thread gripper 19 is rotatable about the vertical thread gripper axis 23 . The suturing operation rotational direction 24 extends in a clockwise direction about the thread gripper axis 23 extending in the direction z in FIG. 2 . The gripper body 20 is permanently connected to a shaft 25 which extends coaxially with the gripper axis 23 . The shaft 25 is rotatably mounted in a bearing seat 26 , which is screwed to the base plate 2 . The drive shaft 27 , which is connected to the transmission drive, is arranged in the bearing housing 26 . The gear ratio of the transmission drive is 1:2, so that one rotation of the drive shaft 27 causes the gripper body 20 on the shaft 25 to rotate twice. The drive shaft 27 is drivably connected to the arm shaft 6 via a belt drive 28 .

拉線刀29用於切斷夾線器線。拉線刀29可以圍繞平行於夾線器軸線23的旋轉軸線30在圖2所示的基本位置和挑線位置處旋轉。在根據圖2的視圖中拉線刀29具 有使人聯想到鐮刀的基本形狀，在根據圖2的視圖中其自由端圍繞線軸殼體22在基本位置上運行。在拉線刀29的挑線位置處，拉線刀29的具有槽底側邊緣32的收線槽31(參見圖4)位於線跡孔18附近。收線槽31被設計在拉線刀29的成角度的邊緣部分32b中，所述成角度的邊緣部分32b以直角佈置成與水平延伸的基體32a相對。拉線刀29的延伸的自由端部分32c被設計成具有圖2的俯視圖中所示的圓的端部。 The thread-pulling knife 29 is used to cut the thread gripper thread. The thread-pulling knife 29 is rotatable about an axis of rotation 30 parallel to the thread gripper axis 23 in the basic and thread take-up positions shown in FIG. 2 . 29 thread-pulling knives in the view according to FIG. 2 There is a basic shape reminiscent of a sickle, the free end of which runs in the basic position around the spool housing 22 in the view according to FIG. 2 . At the thread take-up position of the thread-pulling knife 29 , the thread-receiving groove 31 (see FIG. 4 ) with the groove bottom side edge 32 of the thread-pulling knife 29 is located near the stitch hole 18 . The wire take-up slot 31 is designed in an angled edge portion 32b of the wire-pulling knife 29 which is arranged at a right angle opposite the horizontally extending base body 32a. The extended free end portion 32c of the wire-pulling knife 29 is designed with a rounded end as shown in the top view of FIG. 2 .

位置固定的對置刀片33(見圖3)固定到基板2上的懸臂上，當將拉線刀29從挑線位置旋轉到基本位置時，對置刀片33以切割方式與拉線刀29的邊緣32相配合來切斷線。 The fixed-position opposing blade 33 (see FIG. 3 ) is fixed to the cantilever on the base plate 2. When the thread-pulling knife 29 is rotated from the thread take-up position to the basic position, the opposing blade 33 is in a cutting manner with the thread-pulling knife 29. The edges 32 cooperate to cut the wire.

與拉線刀29的邊緣32相配合同時切斷線的對置刀片33的對置刀片邊緣34沿方向z豎直延伸。 The opposing blade edge 34 of the opposing blade 33 that cooperates with the edge 32 of the wire-pulling knife 29 while cutting the wire extends vertically in the direction z.

圖5和圖6分別示出了縫紉機1的部件的當前位置，首先是”短的向前線跡”位置(圖5)，其次是”回針”位置(圖6)。根據圖5和圖6的當前位置都示出了切斷位置，即因此是緊接在切斷拉線刀29的邊緣32與對置刀片33的對置刀片邊緣34之間的上線13以及底線35之前的時間處所描述的當前位置。還首先示出了在縫製布料15中的最後的線跡S1至S5期間上線13的路徑，並且其次示出了底線35的路徑。下部送料板17也通過線跡孔18的區域中的虛線示出，以便可以看到位於拉線刀29和對置刀片33後面的部分。圖5和圖6還示出了具有下部送料板支撐件36、下部送 料板軸37以及下部送料板升降軸38的下部送料板17的移動引導件的細節；經由移動引導件，沿方向x延伸的傳送轂被轉移到下部送料板17；利用下部送料板升降軸38，將沿著方向z作用的浸入式或抽出式升降器應用到下部送料板17上。在圖5和圖6中未示出移位驅動器18a，該移位驅動器18a作用在圖5和圖6中未示出的線跡設定軸上。 Figures 5 and 6 respectively show the current positions of the components of the sewing machine 1, firstly the "short forward stitch" position (Fig. 5) and secondly the "back stitch" position (Fig. 6). The current position according to both FIGS. 5 and 6 shows the cutting position, ie therefore the upper thread 13 and the lower thread immediately between the edge 32 of the cutting thread-pulling knife 29 and the opposing blade edge 34 of the opposing blade 33 The current location described at the time before 35. Also shown first is the path of the upper thread 13 during the sewing of the last stitches S1 to S5 in the fabric 15, and secondly the path of the lower thread 35. The lower feeder plate 17 is also shown by dashed lines in the area of the stitch holes 18 so that the part behind the thread-pulling knife 29 and the opposing blade 33 can be seen. Figures 5 and 6 also show details of the movement guide of the lower feed plate 17 with the lower feed plate support 36, the lower feed plate shaft 37 and the lower feed plate lift shaft 38; via the movement guide, extending in direction x The transfer hub is transferred to the lower feed plate 17 ; using the lower feed plate lift shaft 38 , a submerged or withdrawable lifter acting in the direction z is applied to the lower feed plate 17 . Not shown in FIGS. 5 and 6 is a displacement driver 18a which acts on a stitch setting axis not shown in FIGS. 5 and 6 .

圖5示出了縫紉機1的正常操作的當前位置，利用該當前位置產生短的線縫端部線。在形成第五線跡S5之前，利用移位驅動器18a將線跡設定傳動機構重新定位到”短的向前線跡”位置，使得這個最後的線跡S5比先前產生的線跡S1至S4短。一旦已經系好第五線跡S5，上線13以及底線35就行進到邊緣32與對置刀片邊緣34之間的切斷位置。特別地，底線35沿著這裡稍微U形的路徑圍繞下部送料板17的部分39走線，所述下部送料板17的部分39限定線跡孔18。 Figure 5 shows the current position of the normal operation of the sewing machine 1, with which the short seam end lines are produced. Before the fifth stitch S5 is formed, the stitch setting gear is repositioned by means of the shift drive 18a to the "short forward stitch" position, so that this last stitch S5 is longer than the previously generated stitch S1 to S 4 short. Once the fifth stitch S 5 has been tied, the upper thread 13 and the lower thread 35 are advanced to the cutting position between the edge 32 and the opposing blade edge 34 . In particular, the bottom thread 35 is routed around the portion 39 of the lower feed plate 17 which defines the stitch holes 18 along a here slightly U-shaped path.

圖6示出了同樣在形成被設計為短的線跡的線跡S5之後縫紉機1的線上跡設定傳動機構位置”回針”中的相應部件。線上跡設定傳動機構的這個位置中，通過移位驅動器18a的相應控制進行重新定位。 FIG. 6 shows the corresponding components in the stitch setting gear position “back stitch” of the sewing machine 1 , also after the stitch S 5 , which is designed as a short stitch, has been formed. In this position of the wire track setting gear, repositioning takes place by corresponding control of the displacement drive 18a.

由於”回針”位置，圖5中的送料板軸37與圖6相比更多地沿逆時針方向旋轉，使得與根據圖5的當前位置相比，在圖6的當前位置中下部送料板17沿正x方向(即縫合方向)移位。這導致送料板部分39相對於這些線13、35的切斷位置、獨立於線跡設定傳動機構而移位，並且原 則上在同樣沿著圖6中的正x方向切斷邊緣32與對置刀片邊緣34之間的上線13和底線35之前進行框架固定。在重新定位到”回針”位置時，送料板部分39相對於縫製布料部分15移動。同時，縫製布料部分15通過壓腳17a相對於其保持位置固定。最後一個線跡S5與邊緣32、34之間的切斷位置之間的路徑現在不止用於線13、35，因為它處於根據圖5的當前位置，特別地用於根據圖6的當前位置的底線35，使得在切斷線13、35之後，在縫製布料部分15上產生更小的線縫端部線，並且特別是具有不超過10mm的目標線縫突伸部的更短的線縫端部底線。 Due to the "back needle" position, the feed plate shaft 37 in Fig. 5 is rotated more in the counter-clockwise direction than in Fig. 6, so that in the current position of Fig. 6 the lower feed plate is in the current position according to Fig. 5 17 is displaced in the positive x-direction (ie the stitching direction). This results in a displacement of the feeder plate portion 39 relative to the cutting position of these threads 13, 35, independently of the stitch setting drive, and in principle also in the positive x-direction in FIG. The upper thread 13 and the lower thread 35 between the blade edges 34 are framed before they are fixed. The feed plate portion 39 moves relative to the sewing fabric portion 15 when repositioning to the "back stitch" position. At the same time, the sewing fabric portion 15 is fixed relative to its holding position by the presser foot 17a. The path between the last stitch S 5 and the cutting position between the edges 32 , 34 is now not only used for the thread 13 , 35 , since it is in the current position according to FIG. 5 , in particular for the current position according to FIG. 6 the lower thread 35 so that, after cutting the threads 13, 35, a smaller seam end line and in particular a shorter seam with a target seam protrusion of no more than 10 mm are produced on the sewn fabric portion 15 Bottom line at the end.

圖7示出了利用縫紉機1產生的線縫40。線縫端部底線41從最後一個線跡S5突伸出來，其中目標線縫突伸部A相對於該線縫40不超過10mm。 FIG. 7 shows a seam 40 produced with the sewing machine 1 . The seam end bottom thread 41 protrudes from the last stitch S 5 , wherein the target seam protrusion A is no more than 10 mm relative to this seam 40 .

用於產生這種具有不超過10mm的目標線縫突伸部的線縫端部底線的方法包括用線跡Si縫合線縫，其中當在線縫端部切斷底線35之前，將下部送料板17從縫合操作位置(例如從”短的向前線跡”位置)移位到沿著縫合方向x移位的切斷位置(即，例如”回針”位置)。然後，通過邊緣32、34之間的配合，利用拉線刀29在線縫端部切斷底線35和上線13。 The method for producing such a seam end bobbin thread with a target seam protrusion of no more than 10 mm includes stitching the seam with stitch Si, wherein the lower feeder plate 17 is sewed before the bobbin thread 35 is cut at the seam end. Displacement from a stitching operating position (eg, from a "short forward stitch" position) to a cutting position shifted along the stitching direction x (ie, eg, a "back stitch" position). Then, the lower thread 35 and the upper thread 13 are cut by the thread-pulling knife 29 at the end of the seam by the engagement between the edges 32 and 34 .

與根據圖5的切斷位置相比，下部送料板17還可以移位到另一個切斷位置，該切斷位置沿負x方向移位，使得首先底線35的路徑朝向邊緣32、24之間的切斷位置延伸，其次上線13的路徑進一步朝向邊緣32、24之間的 切斷位置延伸。在下部送料板17的這個位置中，這可以是”最大向前線跡長度”位置。產生相應延伸的線縫端部線13、35。 Compared to the cutting position according to FIG. 5 , the lower feed plate 17 can also be displaced into another cutting position which is shifted in the negative x-direction so that first the path of the lower thread 35 is towards between the edges 32 , 24 The cut position of the second line 13 extends further towards the path between the edges 32, 24 Cut off position extension. In this position of the lower feed plate 17, this may be the "maximum forward stitch length" position. Correspondingly extending seam end threads 13 , 35 are produced.

這裡，線跡縮短(例如，最後一個線跡S5的線跡縮短)不是必需的。因此，縫合也可以以正常的線跡長度繼續，直到最後一個線跡，其中，然後實現了將線跡設定傳動機構從”正常向前線跡”位置重新定位到之後下部送料板17的切斷位置，即，例如重新定位到”回針”位置。 Here, stitch shortening (eg, stitch shortening of the last stitch S5 ) is not necessary. Thus, the stitching can also be continued with the normal stitch length until the last stitch, wherein then the repositioning of the stitch setting transmission from the "normal forward stitch" position to the cut-off position of the lower feed plate 17 is then achieved , i.e., for example repositioning to the "back stitch" position.

控制器18b被設計成使得其在線縫產生結束時以同步方式控制移位驅動器18a，即將下部送料板17從縫合操作位置移位到切斷位置。這裡，控制器18b被設計成是可編程的，用於設定線縫端部的多餘的底線長度。 The controller 18b is designed such that it controls the displacement drive 18a in a synchronized manner at the end of the seam generation, ie the displacement of the lower feed plate 17 from the sewing operation position to the cutting position. Here, the controller 18b is designed to be programmable for setting the excess bobbin thread length at the seam ends.

移位驅動器18a被設計為步進馬達。可選地，可以將移位驅動器設計為線性電磁閥或氣壓缸。當線性電磁閥或氣壓缸被啟動時，這裡可以設想至少一個止動器，用於設定線跡設定傳動機構的位置。這種止動器可以是可調節的設計。也可以設想為不止一個止動器。 The displacement drive 18a is designed as a stepper motor. Alternatively, the displacement drive can be designed as a linear solenoid valve or as a pneumatic cylinder. At least one stop can be envisaged here for setting the position of the stitch setting transmission when the linear solenoid valve or the pneumatic cylinder is activated. Such stops can be of adjustable design. More than one stop can also be envisaged.

13、35:線 13, 35: Line

14:支撐板 14: Support plate

15:布料部分 15: Fabric part

17:送料牙/布料推進器/下部送料板 17: Feed dog / cloth pusher / lower feeding plate

18:線跡孔 18: Stitch hole

29:拉線刀 29: Thread-pulling knife

33:對置刀片 33: Opposite Blades

34:對置刀片邊緣 34: Opposite Blade Edges

36:送料板支撐件 36: Feeder plate support

37:送料板軸 37: Feeder plate shaft

38:送料板升降軸 38: Feeding plate lifting shaft

39:送料板部分 39: Feeder plate part

S1至S5:線跡 S 1 to S 5 : Stitches

Claims (7)

一種具有目標線縫突伸部的線縫端部底線的產生方法，所述目標線縫突伸部至多10mm，所述線縫端部底線係利用以下步驟產生：縫合線縫；在所述線縫的一個端部切斷底線之前，將下部送料板從縫合操作位置重新定位到切斷位置，所述切斷位置相對於所述縫合操作位置沿著縫合方向移位；在所述線縫的所述端部切斷底線；其中所述下部送料板為從下方通過摩擦式接觸沿著所述縫合方向運送縫製布料的部件，其中所述下部送料板係具現為在第一時間段內在縫紉期間與所述縫製布料接合，而在另一個時間段內不與所述縫製布料接合。 A method for producing a seam end bottom thread having a target seam protrusion of at most 10 mm, the seam end bottom thread is generated by the following steps: sewing a seam; Before cutting the bottom thread at one end of the seam, repositioning the lower feed plate from a sewing operation position to a cutting position displaced in the sewing direction relative to the sewing operation position; at the end of the seam The end cuts the bobbin thread; wherein the lower feed plate is a member that conveys the sewing fabric from below by frictional contact along the stitching direction, wherein the lower feed plate tie is now during sewing during a first period of time Engaged with the sewing fabric and not engaged with the sewing fabric for another period of time. 如請求項1所述的方法，其特徵在於，在縫合期間且於切斷之前，實現具有縮短的線跡長度的線跡。 A method as claimed in claim 1, characterized in that a stitch having a shortened stitch length is achieved during sewing and before cutting. 如請求項1所述的方法，其特徵在於，在重新定位所述下部送料板時，將所述下部送料板在所述縫合方向移位。 The method of claim 1, wherein the lower feeder plate is displaced in the stitching direction when the lower feeder plate is repositioned. 如請求項1所述的方法，其特徵在於，所述下部送料板的重新定位係透過針對所述下部送料板的運送長度而控制送料板傳動機構的調節裝置來實現。 The method of claim 1, wherein the repositioning of the lower feeder plate is accomplished by controlling an adjustment device of the feeder plate drive mechanism for the transport length of the lower feeder plate. 一種用於執行根據請求項1所述的方法 的縫紉機，其特徵在於，具有利用上線和底線縫合線縫的線跡形成工具，具有能沿著縫合方向移位的下部送料板，具有用於在線縫端部切斷底線的拉線刀，具有用於使所述下部送料板沿著所述縫合方向移位的驅動器，具有用於控制所述移位驅動器的控制器，其中所述控制器被設計成其在線縫產生結束時以同步方式控制所述移位驅動器，使得所述下部送料板從所述縫合操作位置移位到所述切斷位置。 A method for performing the method according to claim 1 The sewing machine is characterized in that it has a stitch forming tool for stitching seams with upper and lower threads, a lower feed plate that can be displaced along the sewing direction, a thread-pulling knife for cutting the lower thread at the end of the seam, and a A drive for displacing the lower feed plate in the stitching direction, having a controller for controlling the displacement drive, wherein the controller is designed such that it controls in a synchronized manner at the end of seam creation The displacement drive displaces the lower feed plate from the sewing operation position to the cutting position. 如請求項5所述的縫紉機，其特徵在於，具有用於設定所述下部送料板的運送長度的線跡設定傳動機構。 The sewing machine according to claim 5, further comprising a stitch setting transmission mechanism for setting the conveyance length of the lower feed plate. 如請求項6所述的縫紉機，其特徵在於，所述移位驅動器具有用於所述線跡設定傳動機構的線跡設定軸的旋轉驅動器。 The sewing machine according to claim 6, wherein the displacement driver has a rotary driver for a stitch setting shaft of the stitch setting transmission mechanism.
TW107115290A 2017-05-05 2018-05-04 Method for producing a seam end bottom thread with a target seam protrusion, and sewing machine TWI775849B (en)

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