TW201947079A - Thread tensioning device for a machine - Google Patents

Thread tensioning device for a machine Download PDF

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Publication number
TW201947079A
TW201947079A TW108115269A TW108115269A TW201947079A TW 201947079 A TW201947079 A TW 201947079A TW 108115269 A TW108115269 A TW 108115269A TW 108115269 A TW108115269 A TW 108115269A TW 201947079 A TW201947079 A TW 201947079A
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Taiwan
Prior art keywords
tensioning
thread
shaft
sewing
tension
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TW108115269A
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Chinese (zh)
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TWI803631B (en
Inventor
傑德 蘭格列克
弗洛林 休茲
瓊納斯 富士納
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德商都寇帕鷹股份有限公司
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B19/00Programme-controlled sewing machines
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B47/00Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04Automatically-controlled tensioning devices

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

A thread tensioning device (32) for a sewing machine has a tensioning shaft (33) configured such as to allow a sewing thread (13) to be tensioned to be wound around said tensioning shaft (33). At least one tensioning unit (34, 35) interacts with the tensioning shaft (33) to generate a thread tension in the path of the sewing thread (13) downstream of the tensioning shaft (33). A thread path deflecting element (38) is used to deflect a thread path of the sewing thread (13). A thread path of the thread tensioning device (32) is such that the sewing thread (13) is first wound around the tensioning shaft (33) to generate a first thread tension contribution, then runs over the thread path deflecting element (38), and is then wound around the tensioning shaft (33) again to generate a second thread tension contribution. As a result, a thread tensioning device is obtained, which has an improved influence on the thread to be tensioned.

Description

用於縫紉機的線張緊裝置和具有線張緊裝置的縫紉機Thread tensioning device for sewing machine and sewing machine with thread tensioning device

本發明涉及一種用於縫紉機的線張緊裝置和一種具有這種線張緊裝置的機器。The invention relates to a thread tensioning device for a sewing machine and a machine having such a thread tensioning device.

一種用於縫紉機的線張緊裝置從DE 196 33 223 C2中已知。DE 2 157 016 A公開了一種用於紗線加工機上的線張緊的裝置。DE 20 2012 100 110 U1公開了一種包括兩個線張緊盤的面線張緊裝置。DE 103 44 982 A1公開了一種用於縫紉機的線張緊裝置。德國專利說明書No. 962 568公開了一種用於雙針縫紉機中的針線的張緊裝置。DE 20 2009 004 845 U1公開了一種用於縫紉機的線軸裝置。A thread tensioning device for a sewing machine is known from DE 196 33 223 C2. DE 2 157 016 A discloses a device for thread tensioning on a yarn processing machine. DE 20 2012 100 110 U1 discloses an upper thread tensioning device comprising two thread tensioning disks. DE 103 44 982 A1 discloses a thread tensioning device for a sewing machine. German patent specification No. 962 568 discloses a tensioning device for needle threads in a two-needle sewing machine. DE 20 2009 004 845 U1 discloses a spool device for a sewing machine.

本發明的目的是改進上文所述類型的線張緊裝置,以這樣的方式使得其對待張緊的線的影響得到改善。The object of the invention is to improve a thread tensioning device of the type described above in such a way that its influence on the tensioned thread is improved.

根據本發明,所述目的通過一種用於縫紉機的線張緊裝置來實現,所述線張緊裝置具有:至少一個張緊軸,所述張緊軸配置成允許待張緊的縫紉線圍繞所述張緊軸纏繞;至少一個與張緊軸相互作用的張緊單元,以在張緊軸下游的縫紉線的路徑中生成線張力;線路徑偏轉元件,以偏轉縫紉線的線路徑;其中,線張緊裝置的線路徑使得縫紉線首先圍繞張緊軸纏繞,以生成第一線張力作用,然後在線路徑偏轉元件之上(延伸)繞過,然後再次圍繞張緊軸纏繞,以生成第二線張力作用。According to the present invention, the object is achieved by a thread tensioning device for a sewing machine, the thread tensioning device having at least one tensioning shaft configured to allow a sewing thread to be tensioned to surround a sewing thread. The tensioning shaft is wound; at least one tensioning unit interacting with the tensioning shaft to generate a thread tension in a path of the sewing thread downstream of the tensioning shaft; a thread path deflecting element to deflect a thread path of the sewing thread; wherein, The thread path of the thread tensioning device is such that the sewing thread is first wound around the tensioning axis to generate a first thread tension effect, then is wound (extended) around the line path deflection element, and then is wound again around the tensioning axis to generate a second Line tension effect.

根據本發明,發現將線張緊裝置的線張力效應分成兩個線張力作用,在所述兩個線張力作用之間,線路徑偏轉元件執行線路徑的偏轉,以有利的方式協助分配由線張緊裝置施加在縫紉線上的力。特別地,可以避免縫紉線的扭曲,從而防止任何不希望的扭力施加在縫紉線上,特別是防止沿著線張緊裝置的線路徑累積(所謂的不希望的纏結)。將線張緊裝置的效應分成兩個線張力作用,每個線張力作用都是通過圍繞同一個張緊軸形成環而生成的,導致線張緊裝置的緊湊佈置。還可以設想生成許多不同的線張力作用,其特別是不同地可執行性,結果是可以以有利的方式增加總的線張力範圍。縫紉線可以是縫紉機的面線。線張緊裝置還允許生成兩個以上線張力作用。然後,可以由線路徑偏轉元件或由在張緊軸之上提供另一個線路徑的另一個線路徑偏轉元件提供相應的附加線路徑,以生成所述附加的線張力作用。線張緊裝置可以具有恰好一個張緊單元。替代性地,線張緊裝置也可以具有至少兩個張緊單元。張緊單元可以通過偏置彈簧偏置。偏置彈簧可以是壓縮彈簧。壓縮彈簧可以被配置為螺旋彈簧或波紋彈簧。According to the present invention, it is found that the line tension effect of the thread tensioning device is divided into two line tension effects, and between the two line tension effects, the line path deflection element performs the deflection of the line path to assist the distribution of the line by the advantageous way The force exerted by the tensioning device on the sewing thread. In particular, twisting of the sewing thread can be avoided, thereby preventing any undesired torsional force from being applied to the sewing thread, and particularly preventing accumulation of thread paths along the thread tensioning device (so-called unwanted tangles). The effect of the wire tensioning device is divided into two wire tension effects, each of which is generated by forming a loop around the same tensioning shaft, resulting in a compact arrangement of the wire tensioning device. It is also conceivable to generate many different thread tension effects, which are particularly differently executable, with the result that the total thread tension range can be increased in an advantageous manner. The sewing thread may be the upper thread of a sewing machine. The thread tensioner also allows more than two thread tension effects to be generated. A corresponding additional line path may then be provided by the line path deflection element or another line path deflection element that provides another line path above the tensioning shaft to generate the additional line tension effect. The thread tensioning device may have exactly one tensioning unit. Alternatively, the wire tensioning device may also have at least two tensioning units. The tensioning unit can be biased by a bias spring. The bias spring may be a compression spring. The compression spring may be configured as a coil spring or a ripple spring.

線路徑偏轉元件配置為可旋轉銷或可圍繞銷軸線旋轉的輥,所述銷被配置成使得允許縫紉線圍繞所述銷纏繞,就施加在縫紉線上的力而言,其是特別中立的。然後,可旋轉銷或可旋轉輥能夠與在其上延伸的縫紉線一起旋轉。The thread path deflecting element is configured as a rotatable pin or a roll rotatable about a pin axis, the pin being configured such that a sewing thread is allowed to wind around the pin, which is particularly neutral in terms of the force applied to the sewing thread. The rotatable pin or rotatable roller can then be rotated with the sewing thread extending thereon.

單獨考慮,由至少一對壓力張緊盤和至少一個致動器形成的張緊單元的一個實施例,壓力張緊盤成對佈置,使得待張緊的縫紉線在壓力張緊盤之間經過,壓力張緊盤與致動器相互作用,以在壓力張緊盤之間設定壓力,這是從現有技術中已知的,例如從DE 196 33 223 C2中已知。壓力張緊盤可以被配置為貝勒維爾(Belleville)墊圈。張緊單元可以具有兩對壓力張緊盤或甚至兩對以上壓力張緊盤,例如三對、四對、五對或甚至更多對壓力張緊盤。也可以使用可手動操作的調整元件,例如調整螺釘代替電動致動器,以調整張緊單元的張緊力。壓力張緊盤可以佈置成使得相對于張緊軸是不可旋轉的。Considered separately, in an embodiment of the tensioning unit formed by at least one pair of pressure tensioning discs and at least one actuator, the pressure tensioning discs are arranged in pairs so that the sewing thread to be tensioned passes between the pressure tensioning discs The pressure tensioning disc interacts with the actuator to set the pressure between the pressure tensioning discs, which is known from the prior art, for example from DE 196 33 223 C2. The compression tensioner can be configured as a Belleville washer. The tensioning unit may have two pairs of pressure tension discs or even more than two pairs of pressure tension discs, such as three, four, five or even more pairs of pressure tension discs. It is also possible to use a manually operable adjustment element, such as an adjustment screw instead of an electric actuator, to adjust the tensioning force of the tensioning unit. The pressure tensioning disc may be arranged so as to be non-rotatable relative to the tensioning shaft.

由輪式張緊盤、制動體和至少一個致動器形成的張緊單元,其被佈置成使得待張緊的縫紉線在輪式張緊盤的盤部分之間經過,輪式張緊盤與致動器相互作用,以設定由制動體施加在輪式張緊盤上的壓力,證明特別適合於生成具有有利的大張力範圍的線張力,特別是可再現地生成預定的線張力。配置成容納待張緊的線的相應的輪式張緊盤的盤區段可以彼此剛性地連接,例如彼此焊接。通過周向保持區段可以生成輪式張緊盤的保持效應,所述周向保持區段特別可以以舌形保持區段的方式配置。這些保持區段能夠彼此相互接合,以這樣的方式使得在保持區段與待張緊的線之間獲得可再現的摩擦連接。輪式張緊盤可以可旋轉地裝配在張緊軸上。在這種情況下,當張緊盤圍繞張緊軸被引導時,輪式張緊盤能夠與待張緊的線共同旋轉。然後,可以由致動器壓力通過由致動器操作的制動體施加在輪式張緊盤上的相應的壓力相關制動效應生成線張力。A tensioning unit formed of a wheeled tensioning disc, a brake body and at least one actuator, which is arranged such that a sewing thread to be tensioned passes between the disc portions of the wheeled tensioning disc, the wheeled tensioning disc Interaction with the actuator to set the pressure exerted by the brake body on the wheeled tensioning disc has proven to be particularly suitable for generating a line tension with a favorable large range of tension, and in particular reproducibly generating a predetermined line tension. The disk sections of the respective wheeled tensioning disks configured to receive the wires to be tensioned may be rigidly connected to each other, for example welded to each other. The retaining effect of the wheel-type tensioning disc can be generated by the circumferential retaining section, which can be configured in particular as a tongue-shaped retaining section. These holding sections can be engaged with each other in such a way that a reproducible frictional connection is obtained between the holding section and the line to be tensioned. The wheel-type tensioning disc can be rotatably mounted on the tensioning shaft. In this case, when the tensioning disc is guided around the tensioning axis, the wheeled tensioning disc can be co-rotated with the line to be tensioned. The linear tension can then be generated from the actuator pressure through the corresponding pressure-dependent braking effect exerted on the wheel tensioner by the brake body operated by the actuator.

作用在一對張緊盤上的致動器可以經由金屬絲彈簧和/或波紋彈簧作用在所述對張緊盤上。An actuator acting on a pair of tension discs may act on the pair of tension discs via a wire spring and / or a ripple spring.

配置為步進電機的致動器允許特別微調和可再現的線張力設定。步進電機可以借助於齒輪單元作用在至少一個張緊單元上,所述齒輪單元有助於提高步進電機對所生成的線張力作用的影響的靈敏度或調整程序的速度或相應的張緊單元的開口。也可以使用直線電機代替步進電機。致動器可以具有齒輪單元。多頭縫紉線可以用於在致動器與張緊盤之間傳遞力。步進電機可以是轉矩控制的。An actuator configured as a stepper motor allows for particularly fine-tuning and reproducible wire tension settings. The stepper motor can act on at least one tensioning unit by means of a gear unit, which helps to increase the sensitivity of the stepper motor to the effect of the generated wire tension or to adjust the speed of the program or the corresponding tensioning unit Opening. Instead of a stepper motor, a linear motor can also be used. The actuator may have a gear unit. Multi-head sewing threads can be used to transfer force between the actuator and the tensioning disc. Stepper motors can be torque controlled.

至少兩個張緊單元,其被佈置在張緊軸上並且被配置成使得生成相應的線張力作用,允許以特別獨立的方式設定不同的線張力作用。At least two tensioning units, which are arranged on the tensioning shaft and are configured such that corresponding thread tension effects are generated, allowing different thread tension effects to be set in a particularly independent manner.

作為將張緊單元設計為一對張緊盤的替代方案,張緊單元本身可以由至少一個步進電機形成,張緊軸由步進電機驅動。張緊軸可以形成步進電機的電機軸,也可以經由齒輪單元連接到所述電機軸。As an alternative to designing the tensioning unit as a pair of tensioning disks, the tensioning unit itself may be formed by at least one stepper motor, and the tensioning shaft is driven by the stepper motor. The tensioning shaft may form a motor shaft of a stepper motor, or may be connected to the motor shaft via a gear unit.

具有根據本發明的線張緊裝置的縫紉機的優點對應於上面已經參考線張緊裝置說明的那些。除了上面說明的線張緊裝置(其然後用作主線張緊裝置)之外,線預張緊裝置可以佈置在主線張緊裝置上游的縫紉線的線路徑中。The advantages of a sewing machine with a thread tensioning device according to the invention correspond to those already explained above with reference to the thread tensioning device. In addition to the thread tensioning device described above, which then serves as the main thread tensioning device, the thread pre-tensioning device may be arranged in the thread path of the sewing thread upstream of the main thread tensioning device.

雙鎖線跡縫紉機1具有機架1a,所述機架包括具有支架3的底板2和成角度的臂4,支架從底板向上延伸。所述臂終止於頭部5。臂軸6安裝用於在臂4中旋轉。在頭部5中,臂軸6通過線桿8驅動曲柄驅動器7。曲柄驅動器7與針桿9驅動連接,所述針桿以軸向可移置的方式安裝在頭部5中。所述針桿9在其下端具有針10。借助於曲柄驅動器7,針10可沿著垂直軸11上下移動。The double-lock stitch sewing machine 1 has a frame 1a, which includes a base plate 2 with a bracket 3 and an angled arm 4, the bracket extending upward from the base plate. The arm terminates in the head 5. The arm shaft 6 is mounted for rotation in the arm 4. In the head 5, an arm shaft 6 drives a crank drive 7 through a wire rod 8. The crank driver 7 is drivingly connected to a needle bar 9 which is mounted in the head 5 in an axially displaceable manner. The needle bar 9 has a needle 10 at its lower end. By means of the crank drive 7, the needle 10 can be moved up and down along the vertical axis 11.

下面將使用笛卡爾xyz坐標系來簡化位置關係的圖示。垂直軸11沿著該坐標系的z方向延伸。x方向垂直於圖1的繪圖平面且進入圖1的繪圖平面延伸並且平行於縫紉機1的縫紉方向延伸。y方向在圖1中向左延伸。The Cartesian xyz coordinate system is used below to simplify the illustration of positional relationships. The vertical axis 11 extends along the z-direction of the coordinate system. The x direction is perpendicular to the drawing plane of FIG. 1 and extends into the drawing plane of FIG. 1 and extends parallel to the sewing direction of the sewing machine 1. The y-direction extends to the left in FIG. 1.

針10將針線13引導到孔眼中,所述針線13經由線張緊裝置和線桿8由配置為卷軸12的面線供給件供給並且也稱為面線,所述線張緊裝置將參考圖2及以下內容進行更詳細的說明。針線13具有自由的面線開始段13a。The needle 10 guides the needle thread 13 into the eyelet, said needle thread 13 being supplied via a thread tensioning device and a thread rod 8 by a surface thread supply configured as a reel 12 and also referred to as a surface thread, said thread tensioning device will be referred to the drawing 2 and below are explained in more detail. The needlework 13 has a free upper thread start section 13a.

底板2攜帶支撐板14,織物片15放置在所述支撐板上,支撐板14借助於螺釘緊固。支撐板14的配置為縫合板16的一部分設有凹部,所述凹部允許下部送料狗牙器17(也稱為下落送料)穿過。送料狗牙器17具有允許針10穿過的縫合孔18。送料狗牙器17以已知的方式與滑動和提升齒輪單元驅動連接,所述滑動和提升齒輪單元被佈置在底板2下方。The bottom plate 2 carries a support plate 14 on which the fabric sheet 15 is placed, and the support plate 14 is fastened by means of screws. The support plate 14 is configured such that a part of the suturing plate 16 is provided with a recess that allows a lower feeding dog tooth 17 (also referred to as a drop feeding) to pass through. The dog feeder 17 has a suture hole 18 that allows the needle 10 to pass through. The dog feeder 17 is drivingly connected in a known manner to a sliding and lifting gear unit which is arranged below the base plate 2.

在支撐板14下方設置有成環器19,所述成環器具有帶有成環器尖端21的成環器本體21。在成環器本體21中,安裝有杯形的線筒殼體,以卷軸22或線軸的方式接收成環器線供給件。卷軸22是底線供應件。成環器線也稱為底線。A ring maker 19 is provided below the support plate 14 and has a ring maker body 21 with a ring maker tip 21. In the looper body 21, a cup-shaped bobbin case is installed, and the looper wire supply is received by the reel 22 or the spool. The reel 22 is a lower thread supply. The looper line is also called the bottom line.

成環器19與針10一起形成針腳成形工具。針10用於引導面線。成環器19用於將面線與底線交織。The looper 19 forms a stitch forming tool with the needle 10. The needle 10 is used to guide the upper thread. The looper 19 is used to interweave the upper and lower threads.

成環器19可圍繞沿z方向延伸的垂直成環器軸線23旋轉。成環器本體20剛性地連接到與成環器軸線23同軸地延伸的軸25。軸25安裝成用於在擰到底板2上的軸承座26中旋轉。在該軸承座26中,安裝有驅動軸27,所述驅動軸連接到佈置在軸承座26內的齒形齒輪單元。齒形齒輪單元具有1:2的傳動比,這意味著設置在軸25上的成環器本體20在驅動軸27的每轉一圈內旋轉兩次。驅動軸27經由皮帶驅動器28與臂軸6驅動連接。The looper 19 is rotatable about a vertical looper axis 23 extending in the z-direction. The looper body 20 is rigidly connected to a shaft 25 extending coaxially with the looper axis 23. The shaft 25 is mounted for rotation in a bearing housing 26 screwed to the base plate 2. In this bearing block 26, a drive shaft 27 is mounted, which is connected to a toothed gear unit arranged inside the bearing block 26. The toothed gear unit has a gear ratio of 1: 2, which means that the looper body 20 provided on the shaft 25 rotates twice in each revolution of the drive shaft 27. The drive shaft 27 is drivingly connected to the arm shaft 6 via a belt drive 28.

在圖1和2的佈置在臂4的殼體部分30上的I/II區段中的線張緊裝置29具有多個線張緊部件,所述線張緊部件在面線13的線路徑中一個接一個地佈置。沿著面線13的線路徑看,在卷軸12之後首先是未詳細示出的線預張緊裝置,所述線預張緊裝置隨後是主線張緊裝置32。根據縫紉機1的設計,也可以省略線預張緊裝置。The thread tensioning device 29 in the I / II section of FIGS. 1 and 2 arranged on the housing part 30 of the arm 4 has a plurality of thread tensioning members which are in the line path of the upper thread 13 One by one. Looking along the line path of the upper thread 13, behind the reel 12 is firstly a wire pretensioning device (not shown in detail), which is followed by a main wire tensioning device 32. Depending on the design of the sewing machine 1, the thread pre-tensioning device may be omitted.

主線張緊裝置32具有張緊軸33(參見圖3),待張緊的面線13圍繞所述張緊軸33纏繞。分別被配置成生成線張力作用的兩個張緊單元34、35與張緊軸33相互作用。張緊單元34、35中的每一個用於在張緊軸33之後的面線13的路徑中生成面線13的線張力或線張力作用。根據主線張緊裝置32的設計,還可以設想精確地提供一個張緊單元,例如張緊單元34,其被用於生成線張力。The main wire tensioning device 32 has a tensioning shaft 33 (see FIG. 3), and the face thread 13 to be tensioned is wound around the tensioning shaft 33. The two tensioning units 34, 35, each configured to generate a linear tension effect, interact with the tensioning shaft 33. Each of the tensioning units 34, 35 is used to generate a line tension or a line tension effect of the surface thread 13 in the path of the surface thread 13 behind the tensioning shaft 33. Depending on the design of the main thread tensioning device 32, it is also conceivable to precisely provide a tensioning unit, such as the tensioning unit 34, which is used to generate thread tension.

張緊單元34、35中的每一個由一對壓力張緊盤36和致動器37形成。相應對的張緊盤的壓力張緊盤36被佈置成使得待張緊的面線13在該對的張緊盤36之間經過。相應對的張緊盤36與致動器37相互作用,以在張緊盤36之間設定壓力。一對壓力張緊盤36和致動器37的這種效應是從現有技術中已知的,並且例如,在DE 196 33 223 C2中進行了描述,特別是參考圖4。Each of the tensioning units 34, 35 is formed by a pair of pressure tensioning disks 36 and an actuator 37. The pressure tensioning disks 36 of the corresponding pair of tensioning disks are arranged such that the face threads 13 to be tensioned pass between the pair of tensioning disks 36. A corresponding pair of tensioning disks 36 interacts with the actuator 37 to set a pressure between the tensioning disks 36. This effect of a pair of pressure tensioning discs 36 and actuators 37 is known from the prior art and is described, for example, in DE 196 33 223 C2, with particular reference to FIG. 4.

致動器37可以是電磁鐵。致動器37也可以是步進電機。The actuator 37 may be an electromagnet. The actuator 37 may be a stepping motor.

兩個張緊單元34、35與同一致動器37相互作用。兩個張緊單元34、35在張緊軸33上彼此直接軸向相鄰地佈置。在兩個張緊單元34、35之間,軸承盤37a被佈置用於兩個張緊單元34、35中的那些張緊盤36,以承受與該軸承盤37a直接軸向相鄰地佈置的張緊盤36。與張緊盤36一樣,軸承盤37a裝配在張緊軸33上,並且用於徑向支撐面向軸承盤37a的張緊盤36。為此,軸承盤37a在任一側上都具有周向軸承凹槽,所述軸承凹槽與面向所述軸承凹槽的相應的張緊盤36的邊緣部分接合。The two tensioning units 34, 35 interact with the same actuator 37. The two tensioning units 34, 35 are arranged directly axially adjacent to each other on the tensioning shaft 33. Between the two tensioning units 34, 35, a bearing disk 37a is arranged for those tensioning disks 36 of the two tensioning units 34, 35 to withstand the axially-adjacent arrangement directly adjacent to the bearing disk 37a. Tension plate 36. As with the tensioning disk 36, a bearing disk 37a is fitted on the tensioning shaft 33 and serves to radially support the tensioning disk 36 facing the bearing disk 37a. To this end, the bearing disks 37a have circumferential bearing grooves on either side, said bearing grooves engaging the edge portions of the corresponding tensioning disks 36 facing said bearing grooves.

除了兩個張緊單元34、35之外,主線張緊裝置還具有線路徑偏轉元件38,以偏轉面線13的線路徑。主線張緊裝置32中的面線13的該線路徑使得面線13首先在兩個張緊單元34、35中的第一個的區域中圍繞張緊軸33纏繞,以生成張緊軸33的第一線張力作用,然後,在兩個張緊單元34、35中的第二個的區域中再次圍繞張緊軸33纏繞之前,在線路徑偏轉元件38之上繞過,以生成第二線張力作用。主線張緊裝置32中的該線路徑也可以使得生成兩個以上線張力作用。在這種情況下,在同一線路徑偏轉元件38之上或在未示出的另一個線路徑偏轉元件之上可以存在附加的線路徑,然後再次圍繞張緊軸33以生成下一個線張力作用。為此,張緊軸33可以攜帶以張緊單元34、35的方式配置的另外的張緊單元,所述另外的張緊單元在圖中未示出。In addition to the two tensioning units 34, 35, the main thread tensioning device also has a line path deflection element 38 to deflect the line path of the face line 13. This line path of the upper thread 13 in the main thread tensioning device 32 causes the upper thread 13 to first be wound around the tensioning shaft 33 in the region of the first of the two tensioning units 34, 35 to generate the tensioning shaft 33. The first thread tension acts and then, before winding again around the tensioning axis 33 in the area of the second of the two tensioning units 34, 35, it is passed over the line path deflection element 38 to generate a second thread tension effect. This thread path in the main thread tensioning device 32 may also cause more than two thread tension effects to be generated. In this case, an additional line path may exist on the same line path deflection element 38 or on another line path deflection element, not shown, and then around the tensioning shaft 33 again to generate the next line tension effect . For this purpose, the tensioning shaft 33 can carry further tensioning units arranged in the manner of tensioning units 34, 35, which are not shown in the figure.

線路徑偏轉元件38被配置為偏轉銷。這種類型的偏轉銷可以牢固地安裝到殼體部分30上,或者,替代性地,也可以被配置成使得可圍繞其銷軸線旋轉。在這種情況下,銷經由徑向軸承以輥的方式安裝在殼體部分30中。The linear path deflection element 38 is configured as a deflection pin. This type of deflection pin may be securely mounted to the housing portion 30 or, alternatively, it may be configured so as to be rotatable about its pin axis. In this case, the pin is mounted in the housing portion 30 in a roller manner via a radial bearing.

替代性地,可以設想將張緊單元34、35設計為輪式張緊盤的相應的一對盤部分。例如,在圖6中示出了這種類型的輪式張緊盤39的一對盤部分,所述盤部分可以形成張緊單元34或35中的一個。Alternatively, it is conceivable to design the tensioning units 34, 35 as a corresponding pair of disk sections of a wheeled tensioning disk. For example, a pair of disk portions of this type of wheeled tensioning disk 39 is shown in FIG. 6, which disk portions may form one of the tensioning units 34 or 35.

輪式張緊盤39的兩個盤部分39a例如通過焊接剛性地彼此連接。輪式張緊盤39的一對盤部分39a的外圓周具有近似的U形或V形凹槽輪廓,在所述凹槽輪廓中,面線13在所述圓周的角範圍內被引導,例如通過將其在360°的範圍內圍繞張緊軸33纏繞。The two disk portions 39a of the wheel-type tensioning disk 39 are rigidly connected to each other, for example, by welding. The outer circumference of the pair of disk portions 39a of the wheel-type tensioning disk 39 has an approximately U-shaped or V-shaped groove profile in which the face line 13 is guided within an angular range of the circumference, for example By winding it around the tensioning shaft 33 in a range of 360 °.

輪式張緊盤39的一對盤部分39a的外輪廓由兩個帶狀物環40形成,所述帶狀物環分別具有沿+/-x方向軸向向外彎曲的多個帶狀物41。兩個帶狀物環40的帶狀物41沿圓周方向的佈置使得帶狀物41與兩個帶狀物環40中的一個相關聯,然後以交替的方式與兩個帶狀物環40中的另一個相關聯。所述凹槽輪廓的輪廓基部由帶狀物41的保持部分42形成,所述保持部分在x方向上彼此重疊。這確保了當圍繞張緊盤39的一對盤部分39a纏繞時,面線13以相對于張緊軸33的軸線的精確限定的半徑延伸。The outer contour of the pair of disk portions 39a of the wheel-type tensioning disk 39 is formed by two ribbon loops 40 each having a plurality of ribbons that are bent axially outward in the +/- x direction. 41. The arrangement of the ribbons 41 of the two ribbon loops 40 in the circumferential direction causes the ribbons 41 to be associated with one of the two ribbon loops 40 and then to the two ribbon loops 40 in an alternating manner. Associated with another. The contour base of the groove contour is formed by a holding portion 42 of the ribbon 41, which holding portions overlap each other in the x direction. This ensures that the upper thread 13 extends with a precisely defined radius relative to the axis of the tensioning shaft 33 when wound around a pair of disk portions 39 a of the tensioning disk 39.

保持部分42可以被配置為舌部分。The holding portion 42 may be configured as a tongue portion.

無論張緊單元34、35是否被配置為成對的壓力張緊盤36或輪式張緊盤39的成對的盤部分39a,主線張緊裝置32的至少一個張緊單元可以由至少一個步進電機形成,所述步進電機驅動張緊軸33的旋轉。然後,張緊軸33可以被直接配置為這種類型的步進電機的電機軸,或者張緊軸可以經由齒輪單元連接到步進電機的電機軸。當張緊單元被配置為步進電機時,面線13可以完全纏繞在張緊軸33上,特別是不止一次的纏繞在張緊軸33上。Regardless of whether the tensioning units 34, 35 are configured as a paired pressure tensioning disk 36 or a paired disk portion 39a of a wheel-type tensioning disk 39, at least one tensioning unit of the main wire tensioning device 32 may be composed of A stepping motor is formed, and the stepping motor drives the rotation of the tension shaft 33. Then, the tensioning shaft 33 may be directly configured as a motor shaft of a stepping motor of this type, or the tensioning shaft may be connected to the motor shaft of the stepping motor via a gear unit. When the tensioning unit is configured as a stepping motor, the upper thread 13 can be completely wound on the tensioning shaft 33, especially more than once.

從圖2至5中可以看出,殼體部分30可以配備有部件,所述部件通過相應地引導面線13,允許以上述主張緊裝置32的方式形成兩個主線張緊裝置。換句話說,如這些圖所示,殼體部分30可以攜帶兩個主線張緊裝置,所述主線張緊裝置帶有相關聯的張緊軸、相關聯的致動器和相關聯的張緊單元以及相關聯的線路徑偏轉元件。As can be seen from FIGS. 2 to 5, the housing part 30 can be equipped with components which, by guiding the face line 13 accordingly, allow the two main line tensioning devices to be formed in the manner described above for the tensioning device 32. In other words, as shown in these figures, the housing portion 30 may carry two mainline tensioning devices with associated tensioning shafts, associated actuators, and associated tensioning Unit and associated line path deflection element.

致動器37經由壓縮彈簧34分別作用在張緊單元34、35的張緊盤36或39上。壓縮彈簧34可以是螺旋彈簧,特別是螺旋金屬絲彈簧。當使用配置為轉矩控制的伺服電機或步進電機的致動器37時,也可以省略這種類型的張緊彈簧。The actuators 37 act on the tensioning disks 36 or 39 of the tensioning units 34, 35 via compression springs 34, respectively. The compression spring 34 may be a coil spring, particularly a coil wire spring. When an actuator 37 configured as a torque motor-controlled servo motor or stepper motor is used, this type of tension spring may also be omitted.

在帶有壓力張緊盤36的張緊單元34、35的實施例中,線張力是由相應的張緊盤36之間的致動器37施加在設置在其間的線上的壓力生成的。張緊盤36可以不可旋轉地佈置在張緊軸33上。在帶有相應的輪式張緊盤39的盤部分39a的實施例中,所述張力是由致動器37的壓力施加在相應的輪式張緊盤39與制動體之間的制動效應生成的,所述輪式張緊盤與在其線路徑中纏繞在其上的線一起旋轉,所述制動體又可以相對于張緊軸33不可旋轉地佈置。例如,制動體可以是軸承盤37a。In the embodiment of the tensioning units 34, 35 with a pressure tensioning disk 36, the thread tension is generated by the pressure exerted by the actuator 37 between the corresponding tensioning disks 36 on a line disposed therebetween. The tensioning disk 36 may be non-rotatably arranged on the tensioning shaft 33. In the embodiment of the disk portion 39a with the corresponding wheeled tensioning disk 39, the tension is generated by the braking effect of the pressure of the actuator 37 between the corresponding wheeled tensioning disk 39 and the brake body The wheel-type tensioning disc rotates together with the wire wound thereon in its thread path, and the brake body can be arranged non-rotatably with respect to the tensioning shaft 33. For example, the brake body may be a bearing disk 37a.

在主線張緊裝置32下游的線路徑中,面線13在經由線桿8延伸之前經過線緊固彈簧44(也參見圖1)到針10的孔眼。In the thread path downstream of the main thread tensioning device 32, the upper thread 13 passes through the thread fastening spring 44 (see also FIG. 1) to the eyelet of the needle 10 before extending through the thread rod 8.

圖7示出了線張緊裝置32的線路徑。該圖示出了如圖1至5所示的實施例的兩個線張緊裝置32中的一個。然後,另一個線張緊裝置32中的線路徑與其對應。FIG. 7 shows the wire path of the wire tensioner 32. The figure shows one of the two wire tensioning devices 32 of the embodiment shown in FIGS. 1 to 5. Then, the thread path in the other thread tensioner 32 corresponds to it.

針線13首先從圖7中未示出的線預張緊裝置在壓力張緊盤36(第一張緊單元)的第一對45之上繞過。在這樣做時,針線圍繞張緊軸33纏繞超過180°,並且還可以完全圍繞張緊軸33纏繞不止一次。在所示的實施例中,在壓力張緊盤36的第一對45的區域中,針線以大約270°的角範圍圍繞張緊軸33纏繞。當針線圍繞第一對45纏繞時,對縫紉線13生成第一線張力作用。The needle thread 13 is first bypassed from a thread pretensioning device (not shown in FIG. 7) over a first pair 45 of a pressure tensioning disk 36 (first tensioning unit). In doing so, the needle thread is wound more than 180 ° around the tensioning shaft 33 and can also be completely wound more than once around the tensioning shaft 33. In the illustrated embodiment, in the region of the first pair 45 of the pressure tensioning disks 36, the needle thread is wound around the tensioning shaft 33 at an angular range of approximately 270 °. When the needle thread is wound around the first pair 45, a first thread tension effect is generated on the sewing thread 13.

然後,在延伸進入線張緊裝置32的壓力張緊盤36(第二張緊單元)的第二對46之前,針線13以大約180°的接觸角圍繞線路徑偏轉元件38纏繞,並以與第一對45相同的方式圍繞張緊軸33纏繞。當針線圍繞第二對46纏繞時,對縫紉線13生成第二線張力作用。Then, before extending into the second pair 46 of the pressure tensioning disks 36 (second tensioning units) of the thread tensioning device 32, the needle thread 13 is wound around the thread path deflecting element 38 at a contact angle of about 180 °, and The first pair 45 is wound around the tensioning shaft 33 in the same manner. When the needle thread is wound around the second pair 46, a second thread tension effect is generated on the sewing thread 13.

然後,針線13延伸到圖7中未示出的線緊固彈簧。Then, the needle thread 13 extends to a thread fastening spring which is not shown in FIG. 7.

壓力張緊盤36的第一對45佈置在殼體上,而第二對46朝向張緊軸33的自由端佈置。A first pair 45 of the pressure tensioning discs 36 is arranged on the housing, while a second pair 46 is arranged towards the free end of the tensioning shaft 33.

在如圖7所示的實施例中,壓縮彈簧43被配置為波紋彈簧。這裡也可以使用波紋彈簧塊。In the embodiment shown in FIG. 7, the compression spring 43 is configured as a ripple spring. Corrugated spring blocks can also be used here.

縫紉線13可以在相應的張緊單元45、46的區域中以相同的旋轉方向或以相反的旋轉方向圍繞張緊軸33纏繞。根據線的類型和操作條件,兩個方向中的一個“相同的旋轉方向”或“相反的旋轉方向”可能更有利於避免纏結。The sewing thread 13 can be wound around the tensioning shaft 33 in the same rotation direction or in the opposite rotation direction in the region of the corresponding tensioning unit 45, 46. Depending on the type of wire and operating conditions, one of the two directions, "the same direction of rotation" or "opposite direction of rotation," may be more beneficial to avoid tangling.

1‧‧‧縫紉機1‧‧‧ sewing machine

1a‧‧‧機架 1a‧‧‧rack

2‧‧‧底板 2‧‧‧ floor

3‧‧‧支架 3‧‧‧ bracket

4‧‧‧臂 4‧‧‧ arm

5‧‧‧頭部 5‧‧‧ head

6‧‧‧臂軸 6‧‧‧ arm shaft

7‧‧‧曲柄驅動器 7‧‧‧ crank drive

8‧‧‧線桿 8‧‧‧ pole

9‧‧‧針桿 9‧‧‧ Needle bar

10‧‧‧針 10‧‧‧ needle

11‧‧‧垂直軸 11‧‧‧ vertical axis

12‧‧‧卷軸 12‧‧‧Scrolls

13‧‧‧針線;面線 13‧‧‧ needlework; upper thread

13a‧‧‧面線開始段 13a‧‧‧Beginning of the upper line

14‧‧‧支撐板 14‧‧‧ support plate

15‧‧‧織物片 15‧‧‧fabric sheet

16‧‧‧縫合板 16‧‧‧ suture plate

17‧‧‧送料狗牙器 17‧‧‧Feed dog teether

18‧‧‧縫合孔 18‧‧‧ suture hole

19‧‧‧成環器 19‧‧‧ Looper

20‧‧‧成環器本體 20‧‧‧looper body

21‧‧‧成環器尖端 21‧‧‧ tip of the looper

22‧‧‧卷軸 22‧‧‧Scrolls

23‧‧‧成環器軸線 23‧‧‧ Looper axis

25‧‧‧軸 25‧‧‧axis

26‧‧‧軸承座 26‧‧‧bearing

27‧‧‧驅動軸 27‧‧‧Drive shaft

28‧‧‧皮帶驅動器 28‧‧‧Belt Drive

29‧‧‧線張緊裝置 29‧‧‧Thread tensioner

30‧‧‧殼體部分 30‧‧‧shell part

32‧‧‧主線張緊裝置 32‧‧‧ main line tensioning device

33‧‧‧張緊軸 33‧‧‧Tightening shaft

34‧‧‧張緊單元;壓縮彈簧 34‧‧‧ tensioning unit; compression spring

35‧‧‧張緊單元 35‧‧‧ tensioning unit

36‧‧‧壓力張緊盤 36‧‧‧Pressure tensioner

37‧‧‧致動器 37‧‧‧Actuator

37a‧‧‧軸承盤 37a‧‧‧bearing disc

38‧‧‧線路徑偏轉元件 38‧‧‧line path deflection element

39‧‧‧輪式張緊盤 39‧‧‧ Wheel tensioner

39a‧‧‧盤部分 39a‧‧‧ plate section

40‧‧‧帶狀物環 40‧‧‧ Ribbon Ring

41‧‧‧帶狀物 41‧‧‧ Ribbon

42‧‧‧保持部分 42‧‧‧Maintained

43‧‧‧壓縮彈簧 43‧‧‧Compression spring

44‧‧‧線緊固彈簧 44‧‧‧Wire fastening spring

45‧‧‧第一對;張緊單元 45‧‧‧ the first pair; tensioning unit

46‧‧‧第二對;張緊單元 46‧‧‧ second pair; tensioning unit

下面將參考附圖更詳細地說明本發明的示例性實施例,其中:Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, in which:

圖1示出了顯示雙鎖線跡縫紉機的一些內部細節的示意性前視圖,其中面線路徑在圖1中未示出的線張緊部件的區域中被中斷,換句話說,未示出; Fig. 1 shows a schematic front view showing some internal details of a double-lock stitch sewing machine, in which the upper thread path is interrupted in the area of a thread tensioning member not shown in Fig. 1, in other words, not shown;

圖2示出了顯示縫紉機的殼體部分的附加細節的前視圖,其中線張緊裝置的部件在區段I/II中示出,該區段I/II對應於圖1中的區段I/II; FIG. 2 shows a front view showing additional details of the housing part of the sewing machine, wherein the components of the thread tensioning device are shown in section I / II, which corresponds to section I in FIG. 1 / II;

圖3示出了沿著圖2中的III-III線的剖視圖; 3 shows a cross-sectional view taken along the line III-III in FIG. 2;

圖4示出了從圖2中的觀察方向IV看到的殼體部分的一側; FIG. 4 illustrates one side of the housing portion as viewed from the viewing direction IV in FIG. 2;

圖5示出了如圖2所示的殼體部分的透視斜前視圖; Fig. 5 shows a perspective oblique front view of the housing part shown in Fig. 2;

圖6示出了帶有兩個盤部分的輪式張緊盤,該盤部分可以形成線張緊裝置的主線張緊裝置的張緊單元,而不是一對壓力張緊盤;以及 Figure 6 shows a wheeled tensioning disc with two disc sections, which can form the tensioning unit of the main thread tensioning device of the thread tensioning device, instead of a pair of pressure tensioning discs; and

圖7示出了張緊單元的一個實施例的側視圖,該張緊單元包括兩對壓力張緊盤以及線路徑偏轉元件,該圖示出了在線張緊裝置的區域中的線路徑。 Fig. 7 shows a side view of one embodiment of a tensioning unit comprising two pairs of pressure tensioning discs and a line path deflection element, the figure showing the line path in the region of the line tensioning device.

Claims (8)

一種用於縫紉機的線張緊裝置,具有: 至少一個張緊軸,其配置成允許待張緊的縫紉線圍繞所述張緊軸纏繞, 至少一個張緊單元,其與張緊軸相互作用,以在張緊軸下游的縫紉線的路徑中生成線張力, 線路徑偏轉元件,以偏轉縫紉線的線路徑, 其中,線張緊裝置的線路徑使得縫紉線 首先圍繞張緊軸纏繞,以生成第一線張力作用, 然後在線路徑偏轉元件之上繞過,以及 再次圍繞張緊軸纏繞,以生成第二線張力作用。A thread tensioning device for a sewing machine includes: At least one tensioning shaft configured to allow a sewing thread to be tensioned to be wound around the tensioning shaft, At least one tensioning unit that interacts with the tensioning shaft to generate thread tension in the path of the sewing thread downstream of the tensioning shaft, Thread path deflection element to deflect the thread path of the sewing thread, Among them, the thread path of the thread tensioning device makes the sewing thread First, it is wound around the tension axis to generate the first linear tension effect. Then bypass over the line path deflection element, and Wind again around the tensioning axis to generate a second thread tension effect. 如請求項1所述的線張緊裝置,其特徵在於,所述線路徑偏轉元件被配置為能夠圍繞銷軸線旋轉的銷,所述銷被配置成允許縫紉線圍繞所述銷纏繞。The thread tensioning device according to claim 1, wherein the thread path deflecting element is configured as a pin rotatable about a pin axis, and the pin is configured to allow a sewing thread to be wound around the pin. 如請求項1所述的線張緊裝置,其特徵在於,相應的張緊單元由至少一對壓力張緊盤和至少一個致動器形成,壓力張緊盤如此成對地佈置,以使得待張緊的縫紉線在壓力張緊盤之間經過,壓力張緊盤與致動器相互作用,以設定壓力張緊盤之間的壓力。The thread tensioning device according to claim 1, wherein the corresponding tensioning unit is formed by at least a pair of pressure tensioning discs and at least one actuator, and the pressure tensioning discs are arranged in pairs so that The tensioned sewing thread passes between the pressure tension discs, which interact with the actuator to set the pressure between the pressure tension discs. 如請求項1所述的線張緊裝置,其特徵在於,相應的張緊單元由輪式張緊盤、制動體和至少一個致動器形成,它們被佈置成使得待張緊的縫紉線在輪式張緊盤的盤部分之間經過,輪式張緊盤與致動器相互作用,以設定由制動體施加在輪式張緊盤上的壓力。The thread tensioning device according to claim 1, characterized in that the corresponding tensioning unit is formed by a wheel-type tensioning disc, a brake body and at least one actuator, which are arranged so that the sewing thread to be tensioned The wheel tensioning disc passes between the disc portions, and the wheel tensioning disc interacts with the actuator to set the pressure exerted on the wheel tensioning disc by the brake body. 如請求項1所述的線張緊裝置,其特徵在於,致動器被配置為步進電機。The thread tensioner according to claim 1, wherein the actuator is configured as a stepper motor. 如請求項3所述的線張緊裝置,其特徵在於,包括被佈置在張緊軸上的至少兩個張緊單元,所述張緊單元被配置成生成相應的線張力作用。The thread tensioning device according to claim 3, comprising at least two tensioning units arranged on the tensioning shaft, the tensioning units being configured to generate a corresponding thread tension effect. 如請求項1所述的線張緊裝置,其特徵在於,所述張緊單元由至少一個步進電機形成,張緊軸由所述步進電機驅動。The thread tensioning device according to claim 1, wherein the tensioning unit is formed by at least one stepping motor, and the tensioning shaft is driven by the stepping motor. 一種具有如請求項1所述的線張緊裝置的縫紉機。A sewing machine having the thread tensioning device according to claim 1.
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