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CN-224227405-U - Bottom line pulling device

CN224227405UCN 224227405 UCN224227405 UCN 224227405UCN-224227405-U

Abstract

The utility model discloses a bottom wire pulling device which comprises a moving seat, a clamping mechanism, an elastic piece, a movable clamping hook, a driving mechanism and a blocking piece, wherein the moving seat and the clamping mechanism can synchronously move, the elastic piece is used for enabling the clamping mechanism to be in a closed state, the movable clamping hook can move back and forth between the fixed seat and the clamping mechanism, the driving mechanism drives the movable clamping hook to move so as to be contacted with the clamping mechanism, the driving mechanism can drive the moving seat and the clamping mechanism to synchronously move, the blocking piece can be contacted with the clamping mechanism when the moving seat moves, the clamping mechanism is enabled to be in an open state, meanwhile, the movable clamping hook moves through the driving mechanism to clamp the clamped hook part of the clamping mechanism, the clamping mechanism is kept in the open state, and the driving mechanism drives the movable clamping hook to be separated from the clamped hook part when returning to the closed state through the elastic piece, so that the single driving mechanism can effectively control the movement and the open and closed state changes of the clamping mechanism.

Inventors

  • CHEN XUHUI

Assignees

  • 启翔股份有限公司
  • 启翔针车（上海）有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (10)

  1. 1. A bottom wire pulling device for use with an internal wire pulling machine, comprising: the movable clamping seat is provided with a fixed seat connected to the inner wire machine and a movable seat capable of moving relative to the fixed seat, and the movable seat is provided with a fixed seat connecting part movably connected to the fixed seat and a clamp connecting part formed by extending from the fixed seat connecting part; the clamping mechanism is provided with a fixed clamp fixed on the clamp connecting part and a movable clamp movably connected with the movable seat, the fixed clamp and the movable clamp can synchronously move with the movable seat, so that the range through which the movable clamp moves is set as a clamp moving area, and the movable clamp is provided with a clamped hook part which is arranged at an interval at the fixed seat connecting part and a clamping part which can be contacted with the fixed clamp; the elastic piece is used for acting on the movable clamp, so that the clamping part can be close to the fixed clamp, and further the clamping part and the fixed clamp can be in a closed state; The blocking piece is positioned in the clamp moving area, so that the blocking piece can contact the movable clamp when the movable seat moves, and the clamping part can be far away from the fixed clamp, so that the clamping part and the fixed clamp are both converted from the closed state to an open state; A movable hook arranged between the fixed seat connecting part and the hooked part, and The driving mechanism is used for driving the movable clamping hook to move back and forth between the fixed seat connecting part and the clamped part, and can drive the movable seat to move when the movable clamping hook contacts the clamped part or the fixed seat connecting part; in the process of converting the clamping part and the fixed clamp from the closed state to the open state, the movable clamping hook is driven by the driving mechanism to be close to the clamped part, so that the movable clamping hook can be hooked on the clamped part, the movable clamp cannot pivot relative to the movable seat, and the clamping part and the fixed clamp can be kept in the open state; The driving mechanism drives the movable clamping hook to be separated from the clamped hook part, so that the elastic piece drives the movable clamp to pivot, and then the clamping part is close to the fixed clamp, so that the clamping part and the fixed clamp are both converted from the open state to the closed state.
  2. 2. The device of claim 1, wherein the movable hook has a hook block and a hook recess adjacent to the hook block, and the hooked portion has a hooked block and a hooked recess adjacent to the hooked block, and when both the clamping portion and the fixing clamp are in the closed state, the hook block is opposite to the hooked block, so that the movable hook is close to the movable clamp by the driving mechanism, and the hook block is in contact with the hooked block.
  3. 3. The device according to claim 2, wherein when both the clamping portion and the fixing clamp are in the open state, the hook block is opposite to the hook recess, and the hook block is opposite to the hook recess, so that the hook block can be engaged in the hook recess when the movable hook is close to the movable clamp through the driving mechanism, and the hook portion is engaged in the hook recess.
  4. 4. The bottom wire pulling device according to claim 2, wherein the hooked block is provided with an arc convex surface at a side contacting the hooked block, the hooked block is provided with an arc concave surface having a surface contacting the arc convex surface, and when the movable clamp contacts the blocking member, the movable clamp is rotated in a state that the arc convex surface contacts the arc concave surface.
  5. 5. The device according to claim 1, wherein when the movable hook contacts the hooked portion, the driving mechanism drives the clamping mechanism to a clamping position via the moving seat, such that the clamping mechanism is close to a rotating shuttle of the wire winding machine, and the moving seat further has a positioning component disposed between the fixed seat and the moving seat, and configured to enable the moving clamping mechanism to stay at the clamping position exactly.
  6. 6. The wire pulling device according to claim 5, wherein the positioning assembly is provided with a positioning bead and a positioning groove, the positioning bead is formed on one of the fixed seat and the movable seat, and the positioning groove is formed on the other of the fixed seat and the movable seat, and a portion of the positioning bead can be inserted into the positioning groove so that the clamping mechanism is positioned at the clamping position.
  7. 7. The device according to claim 5, wherein a buffer assembly is disposed between the fixed seat and the movable seat, the buffer assembly can prevent the movable seat from directly striking the fixed seat to make a sound when the clamping mechanism reaches the clamping position, the buffer assembly has a buffer connected to the fixed seat, a buffer telescopic rod movably assembled to the buffer, and a buffer baffle connected to the movable seat, and the buffer baffle can contact the buffer telescopic rod during the movement of the clamping mechanism towards the rotating shuttle, so that the buffer telescopic rod is contracted towards the inside of the buffer, and the clamping mechanism is located at the clamping position when the buffer telescopic rod stops moving relative to the buffer.
  8. 8. The device of claim 1, further comprising a resistance mechanism disposed between the fixed base and the movable base, the resistance mechanism being configured to adjust a movement resistance of the movable base.
  9. 9. The device of claim 1, wherein the clamping mechanism further comprises a hook plate, the hook plate is deformable, and comprises a hook plate connecting portion connected to the fixing clamp and a hook portion extending from the hook plate connecting portion, and the hook portion is bent in a direction approaching to the fixing clamp.
  10. 10. The device for pulling a bobbin thread as recited in claim 1, wherein the movable clamp has a movable clamp arm pivotally connected to the clamp connecting portion, a swing arm pivotally connected to the fixing base connecting portion, and a roller pivotally connected to one end of the swing arm, the movable clamp arm is provided with the hooked portion and the clamping portion, and the swing arm is movably connected to the movable clamp arm at an end far from the roller, and the roller can contact the blocking member to change positions when the movable base moves.

Description

Bottom line pulling device Technical Field The utility model relates to a bottom thread pulling device in the field of sewing machines, which can pull a section of bottom thread with preset length from a shuttle shell, so that the outside of the shuttle shell can reserve the bottom thread with longer length to become a thread end for next seam starting, in particular to the bottom thread pulling device which can effectively control the movement and the opening and closing state change of a clamping mechanism by using a single driving mechanism. Background The sewing machine mainly combines a plurality of layers of sewing materials through sewing, and along with the continuous evolution of technology, the sewing machine on the market at present has various styles, and the sewing machine with different styles can be applied to the sewing operation of different sewing materials, wherein the inner thread machine suitable for sewing the vamp and the sole is available on the market at present. The operation of the existing internal thread sewing machine mainly depends on a rocker arm body capable of swinging back and forth to execute sewing operation, when the existing internal thread sewing machine is sewn on shoes, the shoes can be sleeved on a shuttle head at the tail end of the rocker arm body, and the shoes swing back and forth along with the rocker arm body, so that a main shaft drives a machine needle to pass through the shoes, needle threads can be interwoven on a bottom thread, and further stitch seams are formed around the shoes. However, after the existing thread cutting machine completes the sewing operation, a part of the existing thread cutting machine can automatically cut off the thread mounted on the needle and the bobbin thread mounted on the bobbin case, however, after the existing thread cutting machine completes the sewing operation, a certain length of bobbin thread is reserved outside the bobbin case, the length of bobbin thread reserved outside the bobbin case directly influences the length of thread end generated when the thread cutting machine is next sewn, and if an operator wants to reserve a longer length of bobbin thread outside the bobbin case for the subsequent knotting process, the operator usually needs to manually pull the bobbin thread out of the bobbin case for a certain length, but the operator frequently pulls the bobbin thread manually, so that the operator is easy to feel tired, and the damage to finger skin can be caused. Disclosure of utility model The main aim of the utility model is to provide a bottom thread pulling device which can solve the inconvenience that an operator needs to manually pull out the bottom thread, and when an inner thread machine cuts the needle thread from the bottom thread, the bottom thread pulling device can automatically pull out the bottom thread from the shuttle shell, so that the outside of the shuttle shell can reserve the bottom thread with longer length, thereby being beneficial to generating thread ends with enough length on the surface in a shoe when the inner thread machine is sewn next time, and being capable of remarkably improving the convenience of the operator for carrying out the follow-up knotting process. The utility model aims to provide the bottom wire pulling device with the improved structure, so that when the improved bottom wire pulling device uses the driving mechanism to drive the clamping mechanism to move, the clamping mechanism can be flexibly switched to a closed state or an open state in the moving process, and further, the improved bottom wire pulling device can realize the switching of the opening and closing states of the movable clamping mechanism and the clamping mechanism by using a single driving source, and further, the electric control cost can be effectively reduced. Another object of the present utility model is to provide a bottom line pulling device capable of adjusting a resistance of a moving seat relative to a fixed seat, so that an initial stage of a moving hook driven by a driving mechanism does not move synchronously with the moving seat, but the moving hook can move relative to the moving seat to selectively approach or separate from a hooked portion of a moving clamp, thereby effectively ensuring that the moving hook can be firmly engaged with or separated from the hooked portion of the moving clamp, and even when the moving seat is driven by the driving mechanism in a state that the moving hook contacts the hooked portion, increasing the resistance of the moving seat relative to the fixed seat can prevent the moving hook of the moving seat from being separated from the hooked portion due to the weight of the moving seat, so as to ensure the moving stability of the moving seat. Still another object of the present utility model is to provide a wire pulling device, which can reduce the noise generated when the driving mechanism is operated to the limit position, and reduce the noise generated w