JP3174145U - Thread trimmer for sewing thread - Google Patents

Abstract

Provided is a thread trimmer for a sewing thread that can surely raise a sewing thread from a fabric and trim it to a desired constant or substantially constant length regardless of the direction and posture of the sewing thread when sewing is completed. To do.
A thread trimmer main body 11 having a pair of movable blade bodies 3A, 3B, and a cutting aid 12 removably attached to one of the pair of movable blade bodies 3A, 3B in the thread trimmer main body 11. The cutting assisting tool 12 is slid extending from the back surface of the movable blade body toward the blade edge 3a at a position lower than the lower surface of the movable blade body 3A on the side on which the cutting assistance tool 12 is attached. Curved from the tip of the plate portion 15 and the sliding plate portion 15 toward the blade edge portion 3b of the other movable blade body 3B from the tip of the blade edge portion 3a and toward the upper surface side of the movable blade body 3A. A comb-shaped thread scooping portion 16 that extends in a row, and a comb-shaped thread scooping portion 16 scoops and starts up a sewing thread extending continuously from the end of the seam, and then a pair of blade edge portions 3a and 3b. It is configured to cut.
[Selection] Figure 5

Description

  In the present invention, for example, a double chain stitch seam is formed by a needle thread and a looper thread using a double chain stitch sewing machine, and is connected to the stitching end portion of the seam of the double chain stitch. The present invention relates to a thread trimmer for a sewing thread that is used to cut a sewing thread extending along the front surface or the back surface by manual operation of a sewing manufacturer after completion of sewing.

  When the sewing thread extending along the front or back surface of the sewing fabric is cut after the sewing by the sewing machine is completed, as shown in FIG. It is common to use a thread trimming scissor 10 called a scissors. The thread trimming scissors 10 called a gripping scissors 10 is bent into a substantially U shape in plan view, and has an operation portion 2 that can be gripped by a palm, and branches from the operation portion 2 and extends in a bifurcated shape. A pair of movable blades having a pair of blade edge portions 3a and 3b that are slidably contacted and separated from each other in accordance with an opening / closing operation (actually an operation of grasping the operation unit 2 with a strong force and an operation of releasing the grasping force) 3A and 3B.

  However, when the sewing thread after the completion of sewing is cut using the thread trimmer 10 having the above-described configuration, the sewing position is determined by the sewing manufacturer or the like, so that the sewing manufacturer or the like is determined. Variations in the cutting position are unavoidable due to the skill level of the thread and the handling of the thread at the time of thread trimming, etc., and the thread length (the length remaining on the sewing fabric side) requested by the apparel manufacturer, etc. is aligned. Is very difficult. As a result, the finished appearance of the sewing product is deteriorated, and the thread length remaining on the sewing fabric side is too short, which causes fraying.

  In addition, the direction and posture of the sewing thread at the time of completion of sewing are not constant. For example, the sewing thread extends over the surface or the back surface of the sewing fabric, or is not linear with respect to the seam and extends in a winding state. Often. In such a case, there was a problem that the thread could not be successfully raised from the sewing fabric at the edge of the thread trimming rod 10 and a cutting error was likely to be caused.

  The present invention has been made in view of the above-mentioned circumstances. Regardless of the orientation and posture of the sewing thread at the time of completion of sewing, the sewing thread is surely raised from the fabric to have a desired constant or substantially constant length. An object of the present invention is to provide a thread trimmer for a sewing thread that can be trimmed to the same length.

  In order to achieve the above object, the thread trimmer for a sewing thread according to the present invention has a gripping operation part and a bifurcated branch extending from the operation part, and slides on each other in accordance with an opening / closing operation by the operation part. A thread trimming scissor body having a pair of movable blade bodies having a pair of blade edges contacting and separating, and a cutting aid that is detachably attached to one of the pair of movable blade bodies in the thread trimming scissors body. A thread trimmer for a sewing thread provided, wherein the cutting assisting tool is located at a position below the lower surface of the movable blade on the side to which the cutting assisting tool is attached, from the back surface portion of the movable blade body to the blade edge portion. A sliding plate portion extending toward the blade edge of the other movable blade body from the tip of the sliding plate portion to the tip of the blade edge portion, and on the upper surface side of the movable blade body. A comb-shaped thread scooping portion extending in a curved direction and a pair of movable blades after completion of sewing In the opened state, the sliding plate portion is slid along the surface of the sewing fabric, and the sewing thread extending to the end of the seam and extending along the front or back surface of the sewing fabric is comb-shaped thread scooping portion. By scooping up and starting up from the front or back surface of the sewing fabric, and closing the pair of movable blades in this state, the sewing thread rising from the front or back surface of the sewing fabric is cut at the pair of blade edges. It is comprised as follows.

  According to the thread trimmer for sewing thread according to the present invention having the above-described characteristic configuration, when predetermined sewing is completed, the pair of movable blades of the thread trimmer main body is kept in the open posture and is cut. By sliding the lower surface of the sliding plate portion of the auxiliary tool along the front or back surface of the sewing fabric, the sewing thread extending along the front or back surface of the sewing fabric is comb-like. It is possible to scoop up at the thread scooping portion of the sewing cloth and raise it at a substantially right angle with respect to the front or back surface of the sewing fabric, and the raised thread can be brought into contact with or close to the blade edge portion of one of the movable blade bodies. Then, in such a thread starting state, the pair of movable blade bodies are closed through the operation unit to bring the pair of blade edge portions into sliding contact with each other, whereby the sewing thread can be removed from the front surface or the back surface of the sewing fabric. It is possible to cut at a position separated by a certain distance.

  Therefore, regardless of the length, orientation or posture of the sewing thread at the time of completion of sewing, the sewing thread extending so as to crawl on the front or back surface of the sewing fabric is perpendicular to the blade edge or It can be cut to a right angle and reliably cut without mistakes, and the cutting position is the distance from the bottom of the sliding plate to the edge of the tool, regardless of the skill level of the sewing manufacturer, etc. Therefore, the thread length remaining on the side of the sewing fabric can be adjusted to be constant or substantially constant. As a result, there is an effect that the thread length remaining on the side of the sewing fabric can be set to an appropriate length for preventing fraying of the stitch while improving the finished appearance of the sewing product.

  In addition, the thread trimming scissors main body can be used as it is by simply diverting a gripping scissors or the like that has been conventionally used, and detachably attaching a cutting aid to it. Thread trimming scissors for sewing threads effective for alignment can be manufactured easily and at low cost. Further, by removing the cutting aid, the thread trimming scissors main body can be used for multiple purposes in the same way as a conventional gripping scissors or the like.

In the thread trimmer for a sewing thread according to the present invention, the comb-shaped thread scooping portion in the cutting aid has 5 to 10 comb members arranged in parallel along the longitudinal direction of the edge of the movable blade body. (Claim 2).
In this case, even if the sewing thread extends in any direction on the front or back side of the sewing fabric after the sewing is completed, or even if there is some variation in the sliding operation direction of the heel itself by the sewing manufacturer, the comb-like Thus, it is possible to secure a large scooping range by the scooping portion, and to surely realize a trimming effect of a constant or substantially constant length.

Further, in the thread trimmer for sewing thread according to the present invention, each comb member of the comb-shaped thread scooping portion in the cutting aid is preferably formed in a shape having a rounded tip. 3).
In this case, even if the tip of the thread scooping portion is strongly pressed against the front or back surface of the sewing fabric in order to further secure the thread scooping by the comb member of the comb-shaped scooping portion in the cutting aid, the thread The front or back surface of the sewing fabric is not damaged or damaged by the tip of the scooping comb member. In particular, by polishing the tip of the comb member of the rounded yarn scooping portion, it can be smoothly moved along the front or back surface of the sewing fabric.

Furthermore, in the thread trimmer for a sewing thread according to the present invention, it is preferable that the cutting aid is attached to the one movable blade body so that the position thereof can be changed in the longitudinal direction of the movable blade body ( Claim 4).
In this case, the cutting position of the sewing thread can be easily and arbitrarily adjusted by changing the mounting position of the cutting aid, and it is used so as to trim the thread to an appropriate length corresponding to various stitches. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of an entire thread trimming rod for sewing threads according to an embodiment of the present invention. It is the whole external appearance perspective view of a state where a pair of movable blades were opened by the thread trimmer for sewing thread same as the above. It is a whole external appearance perspective view of a state where a pair of movable blades were closed with a thread trimmer for sewing thread same as the above. It is a bottom view of the stitch structure which shows the state of the sewing thread as an example of the cutting object by the thread trimming bar for the sewing thread same as above. It is a longitudinal cross-sectional view of the principal part for demonstrating the cutting | disconnection effect | action of the sewing thread | yarn by the thread trimmer for sewing threads same as the above. It is a perspective view of the thread trimmer generally used conventionally.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view showing an entire thread trimming bar for sewing threads according to an embodiment of the present invention. FIGS. 2 and 3 are a pair of movable blades of the thread trimming bar for sewing threads. It is a whole external appearance perspective view when a body is in an open and closed state.

As shown in FIGS. 1 to 3, a thread trimmer 1 for a sewing thread according to an embodiment of the present invention includes a thread trimmer main body 11 and a cutting aid 12.
The thread trimming scissors main body 11 is generally used from the past as shown in FIG. 6 and is bent into a substantially U shape in a plan view and can be gripped with a palm in the same manner as the thread trimming scissors called gripping scissors. Along with the operation unit 2 and extending from the operation unit 2 into a bifurcated shape, the operation unit 2 opens and closes (actually, an operation to grip the operation unit 2 with a strong force and an operation to release the grip force). A pair of movable blade bodies 3A and 3B having a pair of blade edge portions 3a and 3b which are in sliding contact with and away from each other, and these are integrally formed in a series.

  The cutting aid 12 is detachably attached to one movable blade body 3A of the pair of movable blade bodies 3A and 3B in the thread trimmer main body 11. The cutting aid 12 includes a substantially U-shaped attachment portion 13 that can be inserted and engaged from the back surface portion 4a side of one movable blade body 3A of the thread trimming scissors main body 11, and the back surface portion 4a side of the movable blade body 3A. A plurality of (two in the drawing) fixing screws 14 for fastening and fixing the mounting portion 13 inserted and engaged from the upper surface side of the movable blade body 3A at a substantially central position in the longitudinal direction of the movable blade body 3A, and mounting (fixing) In the state, the sliding plate portion 15 extending from the back surface portion 4a of the movable blade body 3A toward the blade edge portion 3a at a position lower than the lower surface of the movable blade body 3A, and the tip of the sliding plate portion 15 A comb-shaped thread scooping portion 16 extending gradually curved toward the blade edge 3b side of the other movable blade body 3B and toward the upper surface side of the movable blade body 3A from the tip of the blade edge portion 3a. .

  The comb-shaped thread scooping portion 16 in the cutting aid 12 is composed of 5 to 10 comb members 16a (shown by 9 in the drawing) along the longitudinal direction of the blade edge 3a of the movable blade body 3A. It is provided in parallel with the interval. These comb members 16a are formed in a rounded shape at their tips, and the tips of the round comb members 16a are polished so as not to have burrs.

  Next, the stitch structure showing the state of the sewing thread as an example of the cutting object by the thread trimming bar 1 for the sewing thread having the above-described configuration, and the sewing thread extending continuously from the end of the stitch of the stitch structure. The disconnected state will be described.

  FIG. 4 shows a structure of a double chain stitch seam M sewn on the sewing fabric W with the looper thread 20 and the needle thread 30 using a double chain stitch sewing machine (not shown). This stitch M is obtained when the looper thread 20 passes through the last needle thread loop 30a on the left side formed on the back surface of the sewing fabric W at the end of the stitch M and is sewn for one stitch to prevent fraying. The needle thread 30 is folded back in front of the needle thread 30 coming out of the back surface of the sewing fabric W and cut by a cutting device provided in the double chain stitch sewing machine at a position passing through the left final needle thread loop 30a, while the right needle thread 30 passes through the final needle thread loop 30b formed on the back surface of the sewing fabric W at the end of normal sewing, loops the final needle thread loop 30b, and finally cuts by the cutting device, thereby preventing fraying. Is given.

  As described above, the seam M, which is frayed by self-looping, is cut by the cutting device provided in the double chain stitch sewing machine, and then connected to the end of the seam M on the back surface of the sewing fabric W. When cutting the needle thread 30e and the looper thread 20e extending along a predetermined (desired) length, the above-described thread trimming rod 1 for a sewing thread is used.

  FIG. 5 shows a state in which the sewing thread, that is, the needle thread 30e and the looper thread 20e extending along the back surface of the sewing fabric W are cut off by the thread trimming bar 1 for the sewing thread. When the predetermined sewing is completed, the thread trimming scissors main body 11 is grasped with the palm and the pair of movable blades 3A, 3B is kept in the open posture, and the sliding plate portion 15 of the cutting aid 12 is removed. By sliding the lower surface along the back surface of the sewing fabric W, the looper thread 20e and the needle thread 30e extending along the back surface of the sewing fabric W are scooped by the comb-shaped thread scooping portion 16, and the sewing fabric is obtained. It rises at a substantially right angle with respect to the back surface of W and is brought into contact with or close to the blade edge portion 3a of one movable blade body 3A.

  Subsequently, the operating portion 2 of the thread trimming scissors main body 11 is strongly squeezed with a palm, and the pair of movable blade bodies 3A and 3B are closed to bring the pair of blade edge portions 3a and 3b into sliding contact with each other, whereby the sewing thread 20e. , 30e can be cut at a position separated from the back surface of the sewing fabric W by a certain distance. The cutting position at this time is defined as a position corresponding to the distance from the bottom surface of the sliding plate portion 15 to the blade edge portions 3a, 3b in the cutting assisting tool 12. Regardless, the thread length remaining on the sewing fabric W side can be trimmed to a constant or substantially constant desired by an apparel manufacturer or the like. In particular, in the case of a seam structure with fraying prevention as shown in FIG. 4, the thread length remaining on the side of the sewing fabric W can be set to an appropriate length for fraying prevention of the seam M.

  Further, as shown in the above embodiment, 5 to 10 comb members 16a of the comb-shaped scooping portion 16 in the cutting aid 12 are arranged along the longitudinal direction of the blade edge portion 3a of the movable blade body 3A. In the case of side-by-side installation, even if the sewing thread extends in any direction on the back side of the sewing fabric after the sewing is completed, and even if there is some variation in the sliding operation direction of the heel itself by the sewing manufacturer, etc. Thus, it is possible to secure a large scooping range by the scooping portion 16 and to realize a certain or substantially constant length of alignment.

  In addition, as shown in the above-described embodiment, the tip of each comb member 16a of the comb-shaped scooping part 16 in the cutting aid 12 is formed in a rounded shape, so that the comb-shaped scooping part 16 is formed. Even if the tip of the comb member 16a is strongly pressed against the back surface of the sewing fabric W in order to make the scooping by each of the comb members 16a more reliable, the back surface of the sewing fabric W may be damaged by the tip of the comb member 16a. No damage or damage. In particular, by polishing the tip of the comb member 16a of the rounded thread scooping portion, it can be smoothly moved along the back surface of the sewing fabric W.

In the embodiment described above, the cutting support tool 12 is fixed in the position where the cutting tool 12 is attached to the movable blade body 3A. It is also possible to change the position in the -y direction).
Thus, by changing the position of the cutting assisting tool 12 in the longitudinal direction (xy direction) of the movable blade body 3A, the back surface portion 4a of the movable blade body 3A is not a straight line but a curved line. Thus, the starting point position of the yarn by the comb member 16a changes little by little, and as a result, the cutting length can be finely adjusted.

  Further, in the above embodiment, the example used for cutting the needle thread and the looper thread connected to the end of the frayed seam has been described. Even when used for cutting a sewing thread connected to the end of an eye, the thread length can be made uniform.

DESCRIPTION OF SYMBOLS 1 Thread trimmer for sewing thread 2 Operation part 3A, 3B Movable blade body 3a, 3b Edge part 4a Back part 11 Thread trimmer main body 12 Cutting auxiliary tool 15 Sliding plate part 16 Comb-like thread scoop part 16a Comb member 20e Sewing thread (looper thread)
30e Sewing thread (needle thread)
W Sewing fabric M Seam

Claims (4)

Yarn trimmer having a gripping operation portion, and a pair of movable blade bodies having a pair of blade edge portions that branch out from the operation portion and extend in a bifurcated manner, and are slidably contacted and separated from each other in accordance with an opening / closing operation by the operation portion A thread trimmer for a sewing thread comprising a main body and a cutting aid that is detachably attached to one of the pair of movable blades in the main body of the thread trimmer,
The cutting aid is a sliding plate portion extending from the back surface portion of the movable blade body toward the blade edge portion at a position lower than the lower surface of the movable blade body on the side on which the cutting aid is attached, A comb-shaped scooping portion extending from the tip of the sliding plate portion toward the blade edge of the other movable blade body and further toward the upper surface of the movable blade body from the tip of the blade edge portion; Have
After the sewing is completed, with the pair of movable blades opened, the sliding plate portion is slid along the surface of the sewing fabric so that it is connected to the end of the seam and along the front or back surface of the sewing fabric. Sewing up from the front or back surface of the sewing fabric by scooping the extending sewing thread with the comb-shaped thread scooping section and starting up from the front or back surface of the sewing fabric, and closing the pair of movable blades in this state A thread trimmer for a sewing thread, wherein the thread is cut at a pair of blade edges.   The thread for sewing threads according to claim 1, wherein the comb-shaped thread scooping portion in the cutting aid has 5 to 10 comb members arranged in parallel along the longitudinal direction of the edge portion of the movable blade body. Cut rice cake.   3. The thread trimmer for a sewing thread according to claim 1, wherein each comb member of the comb-like thread scooping portion in the cutting aid is formed in a shape having a rounded tip.   The thread cutting device for a sewing thread according to any one of claims 1 to 3, wherein the cutting aid is attached to the one movable blade body so that the position thereof can be changed in the longitudinal direction of the movable blade body. scissors.

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