JP2724309B2 - Thread break detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn breakage detecting device for a warp or warp knitting machine of a loom or a warp knitting machine.
More specifically, a yarn breakage detection device including a number of separators for arranging warp yarns at a predetermined density, and a vertically rotatable dropper whose center of gravity interposed between these separators is biased toward the front end side. About. The tip of the dropper is a hook hooked on the warp. When warping,
The ends of the warps drawn out from the creel and having many juxtaposed lines are temporarily fixed to a long bar, and the juxtaposed warps are hooked on a hook of a dropper, that is, a thread is inserted.

[0002]

2. Description of the Related Art Conventionally, as a yarn breakage detecting device of this type of warping machine or warp knitting machine, for example, Japanese Patent Publication No. Sho 59-20787
No. is known. This yarn break detection device 100
Has a configuration as shown in FIGS.

[0003] In the preparation of warping, it is very difficult for even a skilled person to hook a warp in a required number of droppers in a parallel manner without leakage. It is. It is necessary to re-hook the missing thread on the hook of the dropper. The adjacent interval between the warps is extremely narrow, and it is necessary to re-thread the yarn while preventing the already-thread from coming off.

In the conventional apparatus 100, the hook 101a of the dropper 101 and the separator 102 are of a common type and lack a thread detachment preventing function. Therefore, the warp T hooked on the hook 101a of the dropper 101 easily comes off when a downward force is applied thereto. Therefore, the operation of re-threading the thread that has been leaked must be performed very carefully so as not to push the warp thread T downward due to contact or the like, and there is a problem that a great deal of time is required to achieve the preparation for warping.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention can reduce the leakage of the warp thread to the dropper at the time of preparation for warping. An object of the present invention is to provide a yarn breakage detecting device for a warp or warp knitting machine of a loom or a warp knitting machine which can be easily achieved.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is a yarn breakage detecting device for a warping machine or a warp knitting machine of a loom or a warp knitting machine, which device arranges the warp yarns at a predetermined density. And a dropper interposed between these separators and rotatable up and down, the dropper having a hook hooked at the tip and having a center of gravity biased toward the tip and the warp cut. In a yarn breakage detecting device adapted to detect a yarn breakage by a movement of a dropper rotating downward, the separator has a head portion located on a rotation line of a hook of the dropper, and the separator has a head portion. This is achieved by a yarn breakage detecting device in which a first hole is formed at a position corresponding to a yarn hooking recess of a hook of a dropper so as to extend and insert a first linear body in a parallel direction of a separator. .

In a state where the thread hooking recess of the hook of the dropper is aligned with the first hole for inserting the first linear body of the head portion of the separator, the portion or the portion abutting on the back surface of the hook. It is preferable that a second hole, which extends in the direction parallel to the separators and is inserted in the second linear body at a position slightly forward, is formed in a portion corresponding to the portion of the separator head.

It is preferable that a plurality of shaft holes are formed in the separator and the dropper in parallel with each other in the front-rear direction for inserting a shaft for supporting the dropper so that the dropper can be vertically rotated.

It is preferable that the diameter of the first hole formed in the separator is smaller than the width of the thread hooking recess of the hook of the dropper.

[0010] In the present specification, in the context of the present invention, the term "forward" refers to the downstream direction of the flow of the drawn out warp. The same is true for the claims.

The above-mentioned "matching" is used in a broad sense including not only literal matching but also almost matching. This is the same in the description of the claims.

The above-mentioned "linear body" refers to a thin linear body such as a piano wire. This is the same in the claims.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a yarn breakage detecting device according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing one embodiment of the yarn breakage detecting device of the present invention. The yarn breakage detecting device 1 includes a plurality of parallel separators 2 for arranging warps (not shown) at a predetermined density;
A dropper 3 is provided between the adjacent separators 2 and 2 and is rotatable vertically about a shaft 4 as a fulcrum. The dropper 3 has a hook 3c having a tip portion hooked on a warp. The shaft 4 extends through the parallel body of the separator 2 and the parallel body of the dropper 2 in the parallel direction thereof.

The yarn breakage detecting device is used for a warp knitting machine such as a tricot knitting machine and a lace raschel knitting machine, or a warping machine or a warp knitting machine of a loom. Hook 3c of dropper 3
When the warp passed through the dropper 3, the dropper 3 rotates counterclockwise around the shaft 4 as a fulcrum, that is, drops, and the movement of the dropper 3 detects the breakage of the thread. The detection of the drop can be performed by a known method using electric means, a magnetic or optical sensor, or the like. It is preferable to detect with a laser sensor from the viewpoint of accuracy and the like. Reference symbol L is a laser head for irradiating the laser light.

As shown in FIG. 2, the separator 2 includes a fixed end 2a, a base 2b connected to the fixed end 2a, an arm 2c extending obliquely forward and upward from the base 2b, and an arm 2c. And a head portion 2d formed at the tip and projecting obliquely rearward and upward. The head 2 d of the separator 2 is located on the rotation line of the hook 3 c of the dropper 3. A plurality of shaft holes 2e are formed in the base 2b in the direction in which the arm 2c extends, and in the present embodiment, three shaft holes 2e are formed. Here, with respect to the diagonally front upper part and the diagonal rear upper part, “front” indicates a downstream side of the flow of the drawn yarn, and “rear” indicates an upstream side. Below,
The same applies to “front” and “back”.

As shown in FIG. 3, the dropper 3 has a base portion 3a having a circular shape, an arm portion 3b extending forward along a linear portion of the base portion 3a, and a hook 3c connected to the tip of the arm portion 3b. Having. The base portion 3a is formed with a shaft hole 3e whose position and number match those of the shaft holes 2e of the separator 2. The thread hooking recess 3d of the hook 3c can be circular.

The head 2d of the separator 2 has a first hole 2f. When the hook 3c of the dropper 3 is located at a position corresponding to the head 2d, the hole 2f of the head 2d is positioned at a phase that matches or substantially matches the thread hooking recess 3d of the hook 3c. Separator hole 2f
Is preferably smaller than the width dD of the concave portion 3d by about the thickness of the warp.

The dropper 3 has a plurality of shaft holes 2e and a plurality of shaft holes 3e.
Are aligned, and the shaft 4 is inserted into any one of the pair of shaft holes 2e and 3e, and is supported on the separator 2 so as to be rotatable up and down in the direction around the shaft 4. Foremost set of shaft holes 2
Even when the shaft 4 is inserted through the shafts e and 3e, the center of gravity is deviated toward the distal end so that the dropper 3 rotates counterclockwise in FIG. 3 under no load. The moment becomes larger as the set of the shaft holes 2e and 3e through which the shaft 4 is inserted is located at the rear. By selecting the front and rear positions of the shaft holes 2e and 3e through which the shaft 4 is inserted, the tension applied to the warp by the load from the dropper 3 changes. That is, the tension can be adjusted.

It is preferable to form a second hole 2g at the rear of the head 2d of the separator 2. The hole 2g is provided with the hook 3 of the dropper 3 in the hole 2f of the separator head 2d.
In a state in which the hook 3c is aligned with the thread hooking recess 3d, a portion of the peripheral surface of a second linear body (P2), which will be described later, comes into contact with the hook 3c back surface 3c 'at a portion corresponding to the portion. It is arranged at a position slightly corresponding to the left part of FIG.

The separator 2 and the dropper 3 are formed of a thin metal plate such as stainless steel. The separator 2 and the dropper 3 preferably have a high surface hardness. In order to increase the surface hardness, it is possible to adopt a specification of applying a carbon hard film coating by a nitriding treatment or a plasma CVD method. In the case of chrome plating, the surface hardness is 650-8
50 HV (Vickers)
It becomes 100 to 1300 HV, and when applied with a carbon hard film coating, it becomes 3,000 HV or more, so that abrasion due to contact with the yarn can be reduced.

FIG. 1 shows the preparation for warping according to the present invention.
This will be described with reference to FIG. 1 to 5, only the pair of separators 2 and the dropper 3 are shown.
Illustration of other separators and droppers is omitted.

The dropper 3 is rotatable up and down around the shaft 4 only by being supported by the shaft 4 inserted into the pair of shaft holes 2e, 3e, and is unstable for hanging the warp on the hook 3c. is there. To solve this, the following method can be adopted.

The hook 3c of the dropper 3 is lifted up to the position shown in FIG. 1, and the recess 3d of the hook 3c and the hole 2f of the separator 2 whose positions match each other are placed in the first hole by a piano wire or the like.
Is inserted through the linear member P1. Then, even if the lifted dropper 3 is released, the dropper 3 is in a stable state because the hook 3c is hooked on the linear body P1.

Alternatively, the upper peripheral edge of the hook 3c protruding from the separator 2 of the lifted dropper 3 and the peripheral edge of the separator 2 on the head portion 2d side are attached to the dropper 3 with an adhesive tape.
Is temporarily fixed so as not to move, and the linear body P1 is inserted in this state. After that, the adhesive tape is peeled off.

When a hole 2g is formed at a predetermined position in the rear part of the head 2d of the separator 2, a second linear body P2 such as a piano wire is inserted through the hole 2g so that the hole 2g is moved upward of the dropper 3. Rotation can be suppressed, and the stable state of the dropper 3 can be improved.

With the dropper 3 stabilized in this way, the warp T drawn out of the creel (not shown) is temporarily fixed to the end of the yarn in parallel with a long bar (not shown). The thread is threaded through the concave portion 3d of the dropper 3 by using.

In this operation, as shown in FIG. 4, first, the warp T is inserted between the hook 3c of the dropper 3 and the head 2d of the separator 2. Next, the warp T is inserted into the hook 3c so as to go through the process of T1, T2, and T3 from the linear body P1 and then lifted up to the ceiling of the recess 3d (see FIG. 5).

By doing so, the warp T is formed in the recess 3
d is held between a part of the inner peripheral surface and a corresponding part of the peripheral surface of the linear body P1. When the linear body P2 is inserted into the hole 2g at the rear end of the head 2d, the linear body P2 is
(c) Because of contact with the back surface, the above-mentioned holding of the warp T is improved.
When the warp T has been passed through all of the required droppers 3, the linear bodies P1 and P2 are pulled out. (See FIG. 6) As described above, the warp T hooked on the dropper 3 is held between the dropper 3 and the linear body P1, so that the hanging leakage can be reduced and the hanging leakage occurs. However, when it is re-threaded, the warp does not come off even if it comes into contact with the already-threaded warp. Therefore, the threading operation can be performed considerably faster than in the past, and the time required for warping preparation is reduced.

When a yarn break occurs, as shown in FIG.
The dropper 3 moves down around the axis 4, the hook 3c falls to a fixed position, and the arm 3b crosses the beam axis L1 of the laser sensor, thereby detecting the thread breakage. Based on this yarn break detection, the warping machine or the warp knitting machine is stopped.

[0030]

As described above, according to the present invention,
At the time of preparation for warping, leakage of the warp thread on the hook of the dropper can be reduced, and if there is a leakage, it can be easily re-threaded.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing one embodiment of a thread breakage detecting device according to the present invention.

FIG. 2 is a side view showing a separator of the yarn breakage detecting device of FIG.

FIG. 3 is a side view showing a dropper of the yarn breakage detecting device of FIG. 1;

FIG. 4 is a perspective view of a separator and a main part of a dropper, showing a state in which a warp is hooked on a hook of a dropper in preparation for warping.

FIG. 5 is a perspective view of a separator and a main part of the dropper, showing a state in which a warp is hooked on a hook of the dropper.

FIG. 6 is a side view of a separator and a dropper showing a state in which preparation for warping is completed.

FIG. 7 is a side view of the separator and the dropper showing a state in which the yarn has been cut.

FIG. 8 is a perspective view showing a main part of a conventional yarn breakage detecting device.

FIG. 9 is a side view of a main part of the yarn breakage detecting device of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thread breakage detection device 2 Separator 2d Head part 2f 1st hole 2g 2nd hole 3 Dropper 3c Hook 3c 'Back of hook 3d Threading recess 2e, 3e Shaft hole 4 Axis P1 First linear body P2 Second Linear body of T warp

Claims (4)

(57) [Claims] 1. A yarn breakage detecting device for a warping machine or a warp knitting machine of a loom or a warp knitting machine, the device comprising a separator for arranging warp yarns at a predetermined density, and a separator between the separators. The dropper includes an interposed vertically rotatable dropper, the tip of which forms a hook to be hooked on the warp, and the center of gravity is deviated to the tip side, and the dropper moves downward when the warp is cut, and the yarn is moved downward. In the yarn breakage detecting device adapted to detect breakage, the separator has a head portion located on a rotation line of a hook of the dropper, and a portion corresponding to a thread hooking recess of the hook of the dropper of the head portion. Wherein a first hole is formed for extending the first linear body in the direction parallel to the separator and inserting the first linear body into the separator. 2. A place or a place in contact with a back surface of a hook of a dropper in a state where a thread hooking recess of a hook of a dropper is aligned with a first hole for inserting a first linear body of a separator head. A second hole extending slightly in front of the separator in a direction parallel to the separator and for inserting the second linear body is formed in a portion of the separator head corresponding to the portion. The yarn breakage detection device according to claim 1. 3. A separator and a dropper, wherein a plurality of shaft holes for inserting a shaft for supporting the dropper in a vertically rotatable manner are formed in parallel in the front-rear direction. 4. The yarn breakage detection device according to claim 1. 4. The yarn breakage according to claim 1, wherein the diameter of the first hole formed in the separator is smaller than the width of the yarn hooking recess of the hook of the dropper. Detection device.