JPH0314148Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the thread guide of a sewing machine, and in particular, the invention is concerned with the thread guide of a sewing machine. This relates to a thread guide in which the thread is first passed through one thread guide hole, then wound around the thread guide, passed through the other thread guide hole, and then guided to the sewing machine.

[Prior art]

This type of thread guide generally has a configuration in which two thread guide holes are formed at an interval in a single plate-shaped thread guide.

[Problem that the invention attempts to solve]

Therefore, in order to pass the thread through the thread guide hole of a conventional thread guide as described above, first pass the free end of the thread through one thread guide hole, then release your finger from the thread, and then pass the thread through the thread guide hole. Pull out the free end of the thread from the other side. Next, wrap the thread around the thread guide and pass the free end of the thread through the other thread guide hole, then release your finger from the thread again, and pull out the free end of the thread that has passed through the thread guide hole from the other side. I was threading the thread.

For this reason, the threading operation takes a long time, especially in overlock sewing machines having a plurality of threads, and has the drawback of reducing work efficiency.

In addition, in order to eliminate this drawback, two thread guide holes formed with a gap between each other are provided with slits that open outward, so that the thread can be threaded while holding the thread end with one's fingers. When the thread is intermittently pulled out by the sewing machine, the thread gets scratched and comes off from the slit in the thread guide hole.
Disadvantages arise that do not achieve the intended purpose.

[Means for solving problems]

This invention uses a thread guide with a lower guide having a gap under the upper guide whose base is fixed to the sewing machine frame, and the upper guide has first and second guide holes 1.
1, 12, insertion slit 10 and first slit 13
and the second slit 14, and the downward guide includes:
Two blocking end surfaces 15, 16 facing the first guide hole
and one blocking end surface 17 facing the second guide hole.

[Effect]

This idea involves holding the free end of the thread with your fingers, passing it through one guide hole, and then winding it around the thread guide, making it possible to pass the thread through the other guide hole as well. This prevents it from coming off from the two guide holes.

〔Example〕

FIG. 1 is a schematic perspective view of the entire hem sewing machine, in which 1 is a sewing machine frame, 2a, 2b, 2c, and 2d are thread tension knobs, 3 is a bed, 4 is a handle,
5 is a thread guide fixed to the sewing machine frame.

As shown in FIGS. 2 and 3, this thread guide body 5 has four sets of thread guide holes for passing four threads through each, but since they all have the same configuration, one set of thread guide holes Only the configuration will be explained.

In the illustrated embodiment, the thread guide body 5 is made of a single plate, and its base has a mounting portion 6 attached to the sewing machine frame 1.
The free end is bent into a U-shape with a gap below, and consists of an upper guide 7 and a lower guide 8.

The upper guide 7 and the lower guide 8 have bent portions 9.
Insertion slits 10 are formed which open outward from the slits and overlap each other vertically.

The upper guide 7 also has two first guide holes 11 and a second guide hole 12 formed at intervals in the left and right direction.
, a first slit 13 that communicates the insertion slit 10 and the first guide hole 11, and a first and second guide hole 1.
A second slit 14 is formed which connects 1 and 12.

As shown in FIG. 3, the lower guide 8 has a groove located at a position facing below the first guide hole 11 of the upper guide 7 to prevent the yarn from moving outward from the first guide hole 11 to the first slit 13. a blocking end surface 15 for preventing the movement of the yarn from the first guide hole 11 toward the second slit 14; Guide hole 12
A blocking end surface 17 is formed to prevent the thread from moving in the direction of the second slit 14.

This invention has the above-mentioned structure. Next, the order of threading through the thread guide 5 will be explained with reference to FIG. 4.

As shown in Fig. 4a, with the free end F of the thread T facing downward, insert the middle part of the thread with the fingertips of both hands into the slit 10.
Insert into.

Next, guide downward 8 while holding the free end F with your fingers.
along the lower surface of the guide, move to the left through the gap between the upper and lower guides 7 and 8, and
The thread T is passed through the guide hole 11 and the second slit 14, and then passed through the second guide hole 12 as shown in FIG. 4b.

Next, hold the free end F of the thread T with your fingers and move it upward, and then insert the fourth thread from above into the insertion slit 10.
After inserting it as shown in Figure C, slide the first slit 13 along the lower surface of the lower guide 8 through the gap between the upper and lower guides 7 and 8, and insert it into the first guide hole 11 of the upper guide 7 as shown in Figure 4 d. threading is completed.

As is well known, the free end F of the thread T threaded as shown in FIG.
Passed through a balance, needle, etc.

Then, the thread T is intermittently consumed by the sewing machine, and the free end F is intermittently pulled downward, causing the thread T
Even if there is a crack in the first and second guide holes 11 and 12,
In the first guide hole 11, movement of the thread T outward from the first slit 13 is prevented by the blocking end surface 15, and movement toward the second slit 14 is prevented by the blocking end surface 15.
6, and in the second guide hole 12, movement of the thread in the direction of the second slit 14 is prevented by a blocking end surface 17.

Therefore, the thread T threaded as shown in Fig. 4d
does not come off from the first and second guide holes 11 and 12.

[Other Examples]

In the illustrated embodiment, the free end of a single plate is bent into a U-shape, and insertion slits, guide holes, slits, etc. are formed therein. It is also possible to make the parts 7 and 8 from separate plates, wires, etc., and to construct them by overlapping them.

[Effect of idea]

As described above, this device allows the thread to be threaded through two guide holes at once without taking your fingers off the thread, making threading operations easy and quick. This has the effect of improving efficiency, and since the thread does not come off the guide hole due to thread fray, products with stable stitches and high commercial value can be obtained, and there is no need to stop or restart the sewing machine due to the thread coming off the guide hole. No need to thread the thread,
It also has the effect of improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the overedge sewing machine, FIG. 2 is a perspective view of the thread guide, FIG. 3 is a partial plan view of the lower guide, and FIG. 4 is an explanatory diagram showing the threading order. DESCRIPTION OF SYMBOLS 1... Sewing machine frame, 5... Thread guide body, 7... Upper guide, 8... Lower guide, 10... Insertion slit, 11... First guide hole, 12... Second guide hole,
13...first slit, 14...second slit,
15, 16, 17... Blocking end surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A thread guide having a base fixed to a sewing machine frame and having a lower guide with a gap under the upper guide, the upper guide and the lower guide opening outward and overlapping each other. An insertion slit is formed, and the upper guide includes first and second guide holes formed at intervals, a first slit that communicates the insertion slit and the first guide hole, and the first guide hole and the second guide hole. and a second slit that communicates with the yarn, and the downward guide has two slits that oppose the first guide hole of the upper guide and prevent the yarn from moving in the direction of the first slit and the second slit of the first guide hole. A thread guide for a sewing machine, comprising a blocking end surface and a blocking end surface that faces a second guide hole of the upper guide and prevents the thread from moving in the direction of the second slit in the second guide hole.