WO2022135162A1 - 一种缝纫机的底线吹气装置 - Google Patents

一种缝纫机的底线吹气装置 Download PDF

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Publication number
WO2022135162A1
WO2022135162A1 PCT/CN2021/136686 CN2021136686W WO2022135162A1 WO 2022135162 A1 WO2022135162 A1 WO 2022135162A1 CN 2021136686 W CN2021136686 W CN 2021136686W WO 2022135162 A1 WO2022135162 A1 WO 2022135162A1
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Prior art keywords
air
thread
blowing device
distribution pipe
bottom thread
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PCT/CN2021/136686
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English (en)
French (fr)
Inventor
毕兴国
赵世良
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浙江美机缝纫机有限公司
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Publication of WO2022135162A1 publication Critical patent/WO2022135162A1/zh

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B81/00—Sewing machines incorporating devices serving purposes other than sewing, e.g. for blowing air, for grinding

Definitions

  • the utility model belongs to the technical field of sewing machines, and relates to a bottom thread blowing device of a sewing machine.
  • the rotary hook mechanism and the thread trimming mechanism are important components.
  • the rotary hook helps to form stitches, and the thread trimming mechanism cuts off the bottom thread at the same time after the last sewing is completed.
  • the end of the thread is usually at the intersection of the hook and the positioning hook, and sometimes it will be thrown left or right under the drive of the moving knife.
  • the uncertainty of the position of the bobbin thread end will lead to the situation that the needle does not go up, that is, the upper thread cannot bring the bobbin thread in the first few stitches of the sewing start, and the position of the bobbin thread end is usually not ideal under the premise of excluding the adjustment of the hook in place. As a result, the needle does not go online.
  • Chinese Patent (Announcement No.: CN202380245U; Announcement Date: 2012-08-15) discloses a pneumatic thread blowing device for a sewing machine.
  • the sewing machine includes a machine head and a machine base.
  • the machine head is provided with a needle head and a presser foot that can move up and down.
  • the pneumatic thread blowing device includes: a driving mechanism for user control; an air blowing unit capable of blowing the cut thread from the cloth, which includes an air blowing port fixed relative to the presser foot, and the air blowing port faces the presser foot needle; a A control unit for controlling the air blowing unit through the driving mechanism, the control unit includes a touch switch matched with the driving mechanism, the control unit is electrically connected to the air blowing unit;
  • the foot blowing device includes a driving mechanism, an air blowing unit, a control unit and a transmission mechanism.
  • the driving mechanism is connected to the control unit through a touch switch, the control unit is electrically connected to the air blowing unit, and the transmission mechanism is drivingly connected to the driving mechanism and the presser foot.
  • the pneumatic thread blowing device of the sewing machine in the above-mentioned patent documents realizes that after the sewing machine is finished sewing, the cut thread ends are blown away from the rotary hook, so as to avoid affecting the next start of the sewing machine. It is for blowing the upper thread at the needle.
  • the pneumatic blowing device is only provided with a blowing pipe, which cannot blow the short end of the bottom thread, so the blowing effect is not good, and the impact on the sewing machine seam still exists.
  • the utility model provides a bottom thread blowing device of a sewing machine.
  • the technical problem to be solved by the present utility model is: how to optimize the thread blowing effect of the bottom thread blowing device.
  • a bottom thread blowing device of a sewing machine the sewing machine comprises a machine base and a rotary hook arranged on the machine base, characterized in that the bottom thread blowing device comprises a main air pipe, a first air pipe and a second air pipe, the branch air pipe
  • the first air pipe and the second air distribution pipe are connected with the main air pipe through a three-way joint, the air distribution pipe one and the air distribution pipe two are fixed on the machine base, and the air outlet of the air distribution pipe is facing the bottom thread of the hook.
  • the air outlet of the second air distribution pipe faces the left side of the thread outlet of the bottom thread of the hook.
  • the working principle is as follows: after the sewing machine is finished sewing, the bottom thread will be cut, and the end of the cut bottom thread will be at the intersection of the positioning hook and the rotary hook.
  • the main control mechanism of the sewing machine sends a control command to the lower thread blowing device.
  • the main air pipe in the lower thread blowing device exhausts the air to the first and second air pipes through the three-way joint.
  • the air outlet of the second air pipe is facing the left side of the outlet of the bottom thread of the rotary hook, so the first and second air pipes blow the end of the bottom thread near the rotary hook to the right front of the rotary hook.
  • the bottom thread blowing device of this sewing machine can automatically blow the bottom thread end of the rotary hook to a proper position after sewing is completed, so as to avoid the problem that the needle does not go up when the sewing machine starts sewing next time.
  • the air blowing pipe 1 and the air blowing pipe 2 blow air at the outlet of the rotary hook, which can also be used to clean the fluff and oil stains on the rotary hook.
  • the lower thread blowing device further includes a solenoid valve, the air inlet of the solenoid valve is connected to an external air source, and one end of the main air pipe is connected to the outlet of the solenoid valve.
  • the air ports are connected to each other, and the other end of the main air pipe is connected to the three-way joint; the air distribution pipe is also provided with a regulating valve 1, and the air distribution pipe 2 is also provided with a regulating valve 2.
  • Operating the regulating valve 1 or regulating valve 2 can change the air flow in the duct 1 or duct 2, thereby changing the impact force of the bottom thread end by the airflow, so as to change the distance it moves.
  • a first mounting hole and a second mounting hole are respectively opened on the base, the first mounting hole is located at the rear side of the thread outlet of the bottom thread of the hook, and the second mounting hole is located at the On the left side of the outlet of the bottom thread of the rotary hook, the first air distribution pipe is inserted into the first installation hole, and the second air distribution pipe is inserted into the second installation hole.
  • the first air distribution pipe and the second air distribution pipe both include a plastic section made of plastic material and a soft metal section made of metal material; the plastic section and the three-way joint
  • the first regulating valve and the second regulating valve are both arranged on the plastic segment, and the soft metal segment is close to the hook.
  • the soft metal segments of the first and second air pipes can be pulled and will not rebound, which is convenient to change the direction of the air outlets of the two, thereby changing the direction in which the bottom thread ends are blown.
  • the soft metal section on the first air distribution pipe is bent obliquely and faces the rear side of the outlet of the lower thread of the hook.
  • the utility model has the following advantages.
  • the bottom thread blowing device is provided with two air distribution pipes, one and two air distribution pipes, which are used to blow the bottom thread ends near the rotary hook.
  • the blowing effect is good, and it can effectively prevent the bottom thread ends from affecting the next sewing machine.
  • the amount of gas blown out by the first and second air pipes in the bottom line blowing device can be changed, so that the air flow has different impact forces on the bottom thread end, and the bottom thread end is blown to a suitable position.
  • Air blowing pipe 1 and air blowing pipe 2 on the bottom thread blowing device blow air to the rotary hook, which can also clean the rotary hook.
  • the ends of the first and second blowing pipes on the bottom thread blowing device toward the rotary hook are made of soft metal material, which is convenient to change the direction of the two blowing ports, and also helps to blow the bottom thread end to the proper position.
  • Figure 1 is a schematic structural diagram of a bottom thread blowing device.
  • the position of the thread-off hook on the rotary hook 3 is the left side of the rotary hook 3
  • the position of the positioning groove of the hook frame on the rotary hook 3 is the rear side of the rotary hook 3 .
  • the sewing machine includes a machine base 1 and a rotary hook 2 arranged on the machine base 1, and the background thread blowing device includes a main air pipe 3, a branch air pipe 4 and a branch air pipe 5, and a branch air pipe 4 and a branch air pipe.
  • the second 5 is connected with the main air pipe 3 through the three-way joint 6, the air distribution pipe 1 4 and the air distribution pipe 2 5 are fixed on the machine base 1, and the air outlet of the air distribution pipe 1 4 faces the rear side of the outlet of the bottom thread of the rotary hook 2.
  • the air outlet of the second air pipe 5 faces the left side of the outlet of the bottom thread of the rotary hook 2 .
  • Mounting hole 1 and mounting hole 2 are respectively provided on base 1.
  • Mounting hole 1 is located on the rear side of rotary hook 2.
  • Mounting hole 2 is located on the left side of rotary hook 2.
  • the second trachea 5 is inserted into the second installation hole.
  • the main control system controls the bottom thread blowing device to work, the main air pipe 3 exhausts the air to the air distribution pipe 1 4 and the air distribution pipe 2 5 through the tee joint 6, and the air distribution pipe 1 4 is inserted in the rear side of the machine base 1.
  • the air distribution pipe 1 4 blows air to the back of the outlet of the bottom thread of the rotary hook 2; the air distribution pipe 2 Air is blown on the left side at the outlet of the lower thread, and the end of the lower thread near the hook 2 is blown to the front right of the hook 2. Blowing the end of the lower thread off the hook 2 can effectively prevent the end of the lower thread from interfering with the next sewing machine.
  • the air distribution pipe 1 4 and the air distribution pipe 2 5 blow air to the rotary hook 2 , which can also clean the rotary hook 2 .
  • the bottom thread blowing device also includes a solenoid valve 7, the air inlet of the solenoid valve 7 is connected with the external air source, one end of the main air pipe 3 is connected with the air outlet of the electromagnetic valve 7, and the other end of the main air pipe 3 is connected to three The joint 6; the air distribution pipe 14 is also provided with a regulating valve 1 8, and the air distribution pipe 5 is also provided with a regulating valve 2 9.
  • Air distribution pipe one 4 and air distribution pipe two 5 both include plastic segment 41 made of plastic material and soft metal segment 42 made of metal material; plastic segment 41 is connected with tee joint 6, regulating valve 1 8 and regulating valve 2 9 are arranged on the plastic section 41, and the soft metal section 42 is close to the hook 2.
  • the soft metal section on the air distribution pipe 1 4 is bent obliquely and faces the rear side of the thread outlet of the bottom thread of the rotary hook 2.
  • the main control system of the sewing machine controls the solenoid valve 7 to exhaust air to the main air pipe 3, and the main air pipe 3 exhausts to the air distribution pipe 1 4 and the air distribution pipe 2 5 through the three-way joint 6, and the gas passes through the air distribution pipe 1 4 and the air distribution pipe 2 5 in turn.
  • the plastic segment 41 and the soft metal segment 42 are then discharged.
  • Regulating valve 1 8 or regulating valve 2 9 can respectively adjust the air flow in the plastic section 41 on the air distribution pipe 1 4 or the air distribution pipe 2 5, thereby changing the air flow rate of the soft metal section 42 blowing gas to the rotary hook 2, thus changing the air flow rate.
  • the impact force of the lower thread end is affected by the airflow, which in turn changes the moving distance of the lower thread end.
  • the direction of the soft metal segment 42 can be changed by pulling it, so as to change the direction of its exhaust gas, thereby changing the moving direction of the bobbin thread.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

本实用新型提供了一种缝纫机的底线吹气装置，属于缝纫机技术领域。它解决了现有缝纫机的底线吹气装置吹线效果不好等技术问题。缝纫机包括机座和设置在机座上的旋梭，本底线吹气装置包括主气管、分气管一和分气管二，分气管一和分气管二与主气管通过三通接头相连接，分气管一和分气管二固设在机座上，分气管一的出气口朝向旋梭底线的出线处后侧，分气管二的出气口朝向旋梭底线出线处的左侧。本实用新型采用两根分气管分别对旋梭底线出线处的后侧和左侧吹气，能够较好的将旋梭附近的底线线头吹动至合适位置。

Description

一种缝纫机的底线吹气装置 技术领域
本实用新型属于缝纫机技术领域，涉及一种缝纫机的底线吹气装。
 背景技术
缝纫机的结构中，旋梭机构和剪线机构是重要的组成机构，旋梭帮助形成线迹，剪线机构在缝纫完成最后一道后将底面线同时切断。当底线切断后线头通常会处于旋梭与定位勾相交配合处，有时会在动刀的带动下向左或向右甩。底线线头位置的不确定性会导致起针不上线的情况发生，即在起缝的前几针面线带不上底线，在排除旋梭调整到位的前提下，通常都是底线线头位置不理想导致的起针不上线。
中国专利（公告号：CN202380245U；公告日：2012-08-15）公开了一种缝纫机气动吹线装置，缝纫机包括机头及机座，机头设一针头和一能上下运动的压脚，该气动吹线装置包括：一供用户控制的驱动机构；一能将被剪断的线头从布料处吹起的吹气单元，它包括一相对压脚固定的吹气口，吹气口朝向压脚针头；一通过驱动机构控制吹气单元的控制单元，控制单元包括一配合驱动机构的触动开关，控制单元电连接吹气单元；及一通过驱动机构控制压脚升降的传动机构，它传动连接驱动机构和压脚吹线装置包括驱动机构、吹气单元、控制单元及传动机构，驱动机构通过触动开关连接控制单元，控制单元电连接吹气单元，传动机构传动连接驱动机构和压脚。
上述专利文献中的缝纫机气动吹线装置实现了在缝纫机缝纫完成后，将剪断的线头从旋梭处吹离，避免影响缝纫机下次起缝。其是针对机针处吹面线，该气动吹线装置上仅设置有一根吹气管，吹不动较为短小的底线线头，因此吹线效果不好，对缝纫机起缝的影响仍然存在。
 技术问题
本实用新型根据现有技术存在的上述问题，提供了一种缝纫机的底线吹气装置，本实用新型所要解决的技术问题是：如何优化底线吹气装置的吹线效果。
 技术解决方案
本实用新型的目的可以通过以下技术方案来实现。
一种缝纫机的底线吹气装置，缝纫机包括机座和设置在所述机座上的旋梭，其特征在于，所述底线吹气装置包括主气管、分气管一和分气管二，所述分气管一和分气管二与所述主气管通过三通接头相连接，所述分气管一和分气管二固设在所述机座上，所述分气管一的出气口朝向所述旋梭底线的出线处后侧，所述分气管二的出气口朝向所述旋梭底线的出线处左侧。
其工作原理如下：缝纫机缝纫完成后会将底线剪断，剪断的底线线头处于定位钩和旋梭相交配合处。此时缝纫机的主控机构向底线吹气装置发出控制命令，底线吹气装置中的主气管通过三通接头向分气管一和分气管二排气，分气管一的出气口朝向旋梭底线的出线处后侧，分气管二的出气口朝向旋梭底线的出线处左侧，因此分气管一和分气管二将旋梭附近的底线线头向旋梭的右前方吹动。本缝纫机的底线吹气装置实现了在缝纫完成后，自动将旋梭处的底线线头吹动至合适位置，避免缝纫机下次起缝时出现起针不上线的问题。吹气管一和吹气管二向旋梭出线处吹气，还能够用于清洁旋梭上的绒毛和油污。
在上述的缝纫机的底线吹气装置中，所述底线吹气装置还包括电磁阀，所述电磁阀的进气口与外部气源相连接，所述主气管的一端与所述电磁阀的出气口相连接，所述主气管的另一端连通所述三通接头；所述分气管一上还设有调节阀一，所述分气管二上还设有调节阀二。操作调节阀一或者调节阀二，能够改变分气管一或者分气管二内的气流量，进而改变底线线头受到气流的冲击力大小，以至于改变其移动的距离。
在上述的缝纫机的底线吹气装置中，所述机座上分别开设有安装孔一和安装孔二，所述安装孔一位于所述旋梭底线的出线处后侧，所述安装孔二位于所述旋梭底线的出线处左侧，所述分气管一插设在所述安装孔一内，所述分气管二插设在所述安装孔二内。
在上述的缝纫机的底线吹气装置中，所述分气管一和分气管二均包括塑料材质制成的塑料段和金属材质制成的软质金属段；所述塑料段与所述三通接头相连接，所述调节阀一和调节阀二均设置在所述塑料段上，所述软质金属段靠近所述旋梭。分气管一和分气管二的软质金属段能够扳动，并且不会反弹，便于改变两者出气口的朝向，从而改变底线线头被吹动的方向。
在上述的缝纫机的底线吹气装置中，所述分气管一上的软质金属段倾斜弯折朝向所述旋梭底线的出线处后侧。
 有益效果
与现有技术相比，本实用新型具有以下优点。
1、本底线吹气装置中设置有分气管一和分气管二两根分气管，用于吹动旋梭附近的底线线头，吹线效果好，能够有效防止底线线头影响缝纫机下次起缝。
2、本底线吹气装置中分气管一和分气管二吹出气体的量能够改变，从而使气流对底线线头产生不同大小的冲击力，将底线线头吹动至合适位置。
3、本底线吹气装置上的吹气管一和吹气管二对旋梭吹气，也能够对旋梭进行清洁。
4、本底线吹气装置上的吹气管一和吹气管二朝向旋梭的一端均为软金属材质制成，方便改变两者吹气口的朝向，也有利于将底线线头吹动至合适位置。
 附图说明
图1是本底线吹气装置的结构示意图。
图中，1、机座；2、旋梭；3、主气管；4、分气管一；41、塑料段；42、软质金属段；5、分气管二；6、三通接头；7、电磁阀；8、调节阀一；9、调节阀二。
 本发明的最佳实施方式
以下是本实用新型的具体实施方式并结合附图，对本实用新型的技术方案做进一步的说明，但本实用新型并不用局限于这些实施例。
本实施例以旋梭3上脱线钩所在的位置为旋梭3的左侧，以旋梭3上梭架定位槽所在的位置为旋梭3的后侧。
如图1所示，缝纫机包括机座1和设置在机座1上的旋梭2，本底线吹气装置包括主气管3、分气管一4和分气管二5，分气管一4和分气管二5与主气管3通过三通接头6相连接，分气管一4和分气管二5固设在机座1上，分气管一4的出气口朝向旋梭2底线的出线处后侧，分气管二5的出气口朝向旋梭2底线的出线处左侧。机座1上分别开设有安装孔一和安装孔二，安装孔一位于旋梭2的后侧，安装孔二位于旋梭2的左侧，分气管一4插设在安装孔一内，分气管二5插设在安装孔二内。
当缝纫机缝纫完成后，主控系统控制底线吹气装置工作，主气管3通过三通接头6向分气管一4和分气管二5排气，分气管一4插设在机座1后侧的安装孔一内，因此分气管一4向旋梭2底线的出线处后侧吹气；分气管二5插设在机座1左侧的安装孔二内，因此分气管二5向旋梭2底线的出线处左侧吹气，旋梭2附近的底线线头被吹向旋梭2的右前方。将底线线头吹离旋梭2，能够有效避免底线线头干扰缝纫机下次起缝。分气管一4和分气管二5向旋梭2吹气，也能够对旋梭2进行清洁。
进一步的，底线吹气装置还包括电磁阀7，电磁阀7的进气口与外部气源相连接，主气管3的一端与电磁阀7的出气口相连接，主气管3的另一端连通三通接头6；分气管一4上还设有调节阀一8，分气管二5上还设有调节阀二9。分气管一4和分气管二5均包括塑料材质制成的塑料段41和金属材质制成的软质金属段42；塑料段41与三通接头6相连接，调节阀一8和调节阀二9均设置在塑料段41上，软质金属段42靠近旋梭2。分气管一4上的软质金属段倾斜弯折朝向旋梭2底线的出线处后侧。
缝纫机的主控系统控制电磁阀7向主气管3排气，主气管3通过三通接头6向分气管一4和分气管二5排气，气体依次经过分气管一4和分气管二5上的塑料段41和软质金属段42后排出。调节阀一8或调节阀二9分别能够调节分气管一4或分气管二5上塑料段41内的气流量，从而改变软质金属段42向旋梭2吹出气体的气流量，因此改变了底线线头受到气流的冲击力大小，进而改变底线线头的移动距离。软质金属段42能够通过扳动改变其朝向，从而改变其排气的方向，进而改变底线线头的移动方向。
本文中所描述的具体实施例仅仅是对本实用新型精神作举例说明。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本实用新型的精神或者超越所附权利要求书所定义的范围。
尽管本文较多的使用了1、机座；2、旋梭；3、主气管；4、分气管一；41、塑料段；42、软质金属段；5、分气管二；6、三通接头；7、电磁阀；8、调节阀一；9、调节阀二等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本实用新型的本质，把它们解释成任何一种附加的限制都是与本实用新型的精神相违背的。

Claims (5)

  1. 一种缝纫机的底线吹气装置，缝纫机包括机座（1）和设置在所述机座（1）上的旋梭（2），其特征在于，所述底线吹气装置包括主气管（3）、分气管一（4）和分气管二（5），所述分气管一（4）和分气管二（5）与所述主气管（3）通过三通接头（6）相连接，所述分气管一（4）和分气管二（5）固设在所述机座（1）上，所述分气管一（4）的出气口朝向所述旋梭（2）底线的出线处后侧，所述分气管二（5）的出气口朝向所述旋梭（2）底线出线处的左侧。
  2. 根据权利要求1所述的缝纫机的底线吹气装置，其特征在于，所述底线吹气装置还包括电磁阀（7），所述电磁阀（7）的进气口与外部气源相连接，所述主气管（3）的一端与所述电磁阀（7）的出气口相连接，所述主气管（3）的另一端连通所述三通接头（6）；所述分气管一（4）上还设有调节阀一（8），所述分气管二（5）上还设有调节阀二（9）。
  3. 根据权利要求1或2所述的缝纫机的底线吹气装置，其特征在于，所述机座（1）上分别开设有安装孔一和安装孔二，所述安装孔一位于所述旋梭（2）的后侧，所述安装孔二位于所述旋梭（2）的左侧，所述分气管一（4）插设在所述安装孔一内，所述分气管二（5）插设在所述安装孔二内。
  4. 根据权利要求2所述的缝纫机的底线吹气装置，其特征在于，所述分气管一（4）和分气管二（5）均包括塑料材质制成的塑料段（41）和金属材质制成的软质金属段（42）；所述塑料段（41）与所述三通接头（6）相连接，所述调节阀一（8）和调节阀二（9）均设置在所述塑料段（41）上，所述软质金属段（42）靠近所述旋梭（2）。
  5. 根据权利要求3所述的缝纫机的底线吹气装置，其特征在于，所述分气管一（4）上的软质金属段倾斜弯折朝向所述旋梭（2）底线的出线处后侧。
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