JPS6226475Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a yarn breakage sensing device in a knitting machine that detects the absence of running knitting yarn.

[Prior art] Conventionally, as this type of device, for example,
As shown in Publication No. 31863, there is provided a switch for detecting the absence of running knitting yarn, an upper proximal end is rotatably supported around an axis, and a free end is connected to the knitting yarn. As well as being placed on the knitting yarn,
A rotary member for rotating downward to actuate the switch due to the absence of the knitting yarn, and a rotary member on both sides of the position of the free end of the rotary member placed on the traveling knitting yarn. There is a knitting yarn supporting means which is provided with a pair of knitting yarn supporting means each supporting the lower side of the knitting yarn.

[Problems to be Solved by the Invention] According to the conventional method, the knitting yarn supporting means is constituted by a fork-shaped member rotatably supported on a bracket, and the fork-shaped member is A structure is adopted in which the bracket is provided with a wire member having an inverted V-shaped thread guide portion to prevent the traveling knitting yarn from coming off the fork-like member.
The knitting yarn guide support structure has a large number of parts, and requires many man-hours for processing and assembly, resulting in high costs.
Moreover, when setting the knitting yarn, there is a drawback that a troublesome operation of passing the knitting yarn through the inverted V-shaped yarn guide section is involved.

Therefore, the present invention significantly simplifies the configuration of the knitting yarn guide means at the location where the free end of the rotating member is arranged, thereby making it easier to manufacture and reducing costs. This makes it possible to set the

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention particularly provides a yarn extending in the running direction of the knitting yarn in a perpendicular state near the free end of the rotating member. A guide plate is provided, and a pair of knitting yarn support pieces are integrally bent at the lower edge of one side of the yarn guide plate, each protruding in the horizontal direction in the vicinity of both sides of the position of the free end of the rotating member. The knitting yarn support piece is formed with a yarn regulating piece that is integrally bent at the protruding end of each knitting yarn support piece, each of which projects upwardly.

〔Example〕

An embodiment embodying the present invention will be described in detail below with reference to FIGS. 1 to 7.

Although not shown, a knitting carriage (not shown) is installed on the upper surface of the horizontally long knitting machine body, which has a needle bed with a large number of knitting needles arranged in rows, so that it can slide left and right in the direction in which the knitting needles are arranged. It will be hung. The carriage is equipped with a pulse motor, its operating circuit, etc., and is configured to slide stepwise. Note that the carriage may be continuously slid by a DC motor.

A column 1 is removably installed on the upper surface of the rear side of the knitting machine body, and the upper peripheral surface of the column 1 has a 180 mm diameter.
Fin-shaped support pieces 2 that are spaced apart from each other and protrude outward from each other.
is formed. Reference numeral 3 denotes an intermediate yarn guide wire whose base is fixed to the upper and lower intermediate portions of the support 1, through which the knitting yarn T paid out from a yarn source such as a yarn ball is inserted and guided to a tension applying device described later.

On the upper side of the support column 1, a tension applying device A composed of the following elements is removably supported.

That is, in the figure, reference numeral 4 denotes a support member integrally formed from a synthetic resin material, which includes a fitting hole 5 that fits into the upper end of the support column 1, and a pair of support pieces 2 that are fitted and supported by the pair of support pieces 2. support groove 6 and slit-shaped fitting groove 7
and a locking piece 8 having a rectangular locking hole 8A in the left-right direction. The left rear portion of the locking piece 8 is cut out, thereby forming a locking surface 8B.
Reference numeral 9 denotes a support plate whose base end is fitted and fixed into the fitting groove 7, and a shaft 10 is fixed to the upper side thereof in the left and right directions. Reference numeral 11 denotes a tension applying piece that is supported by the shaft 10 and that clamps the knitting yarn T and applies tension to it. Reference numeral 12 denotes a tension spring, the base end of which is attached to a support piece 13 supported by the shaft 10. Reference numeral 14 denotes a thread guide plate whose base end is supported by the shaft 10, and an extension part 1 extending forward in a vertical state.
5, a pair of upright knitting yarn guide pieces 16, and a pair of flat large and small knitting yarn support pieces (knitting yarn support members) 17,1.
8, a gap 19 cut out between the two knitting yarn support pieces 17, 18, and a yarn regulating piece 20 protruding upward from the right side of each of the knitting yarn support pieces 17, 18 across the gap 19. Further, a wire-shaped guide 21 for guiding the knitting yarn T through the thread is fixed to the front end.

The knitting yarn T is guided to the tension applying device A configured as described above in the following manner. That is, the knitting yarn T that has passed through the intermediate yarn guide wire 3 first passes through the tension applying piece 11, passes between the pair of knitting yarn guide pieces 16, over both the knitting yarn support pieces 17 and 18, and then passes through the guide piece 21. It is hung on the tension spring 12 through
This leads to the clue to the carriage.

The locking piece 8 of the tension applying device A is removably provided with a yarn breakage sensing device B that senses the absence of the knitting yarn T running at the tension applying device A.

The yarn breakage sensing device B will be explained below. In the figure, reference numerals 22 and 23 are a pair of left and right support boxes made of synthetic resin material, which are butted against each other and connected with screws 24. .
The left side surface of the left support box 22 has a groove 25 in the middle, protrudes to the left side, and has a locking hole 8A of the locking piece 8.
Two-pronged locking pieces 26 and 27 that can be fitted are provided on the rear side surface of the rear side locking piece 27, and a locking step portion 27A that can be engaged with the locking surface 8B of the locking hole 8A. is formed, and a notch groove 28 is formed on the lower front side,
Furthermore, a switch support piece 29 is provided on the upper inner surface. The right support box 23 also has an upper base leg 30 of a rotating member 30 formed by bending a round bar into a substantially U-shape.
A is rotatably supported around an axis in the left and right direction, and a cutout groove 31 is provided at the lower front surface, and a switch holding piece 32 is further provided at the upper inner surface. Reference numeral 33 indicates the switch support piece 29 and the switch presser piece 32 inside the support boxes 22 and 23.
This is a normally closed switch that is clamped and fixed between the knitting machine main body side and the carriage operating circuit.
4, whose upper part is fixed to the front surface and whose lower free end is connected to the notched grooves 28, 31.
A switch actuating member 35 made of a leaf spring is provided which projects diagonally forward and downward to the position . The switch operating member 35 is normally placed in an inactive position in which it does not act on the switch 33, and operates the switch 32 by bending backward against its own elasticity.

This embodiment is configured as described above.

When preparing the tensioning device from the stored state, support the tensioning device A at the upper end of the support column 1 erected on the rear upper surface of the knitting machine main body, and insert the tensioning device A into the locking hole 8A of the locking piece 8. By fitting the bifurcated locking pieces 26 and 27 of the thread breakage sensing device B, once the rear side locking piece 27 is slightly bent toward the front side locking piece 26 against its own elasticity. , the locking stepped portion 27A engages with the locking surface 8B of the locking hole 8A, whereby the yarn breakage sensing device B is fixedly supported.

Thus, the knitting yarn T drawn out from the yarn source is stretched over the tension applying device A as described above, and the knitting yarn portion lying on the gap 19 between the pair of knitting yarn support pieces 17 and 18 is On the free end 3 of the pivot member 30
Place 0B. In this case, to set the knitting yarn T, it is sufficient to simply place the knitting yarn T from above the knitting yarn support pieces 17, 18.
Its operation is extremely simple, and once it is set, it is confined between the extension part 15 of the yarn guide plate 14 and the yarn regulating piece 20, so that it cannot come off from the knitting yarn supporting pieces 17, 18 to the outside. Along with the lack of
The free end 30 of the rotating member 30 is placed on the knitting yarn T.
B can be placed securely.

When knitting is started in this state, the switch 33 will remain energized and the carriage motor will not operate normally unless the knitting yarn T is given normal tension and the knitting yarn T is not cut or lost. The knitting action is performed by sliding the carriage.

During this knitting process, for example, knots or tangled parts of the knitting yarn T may get caught on the intermediate yarn guide wire 3, etc., and the knitting yarn T may be cut or lost. A pair of knitting yarn support pieces 17,
18, the free end 30B of the rotating member 30 rotates downward due to its own weight, as shown in FIG.
8 and 31 and abuts against the switch operating member 35 in the support boxes 22 and 23, and the switch operating member 35
is moved from the inactive position shown by the solid line to the switch operative position shown by the two-dot chain line in FIG. 3, and the switch 33 is turned off. This action takes place virtually instantaneously. This causes the motor to stop and the carriage to stop automatically.

Note that during knitting, for example, the carriage may be largely slid to the side of the needle bed or to the outside of the needle bed, or the knitting yarn T
By pulling the yarn by mistake, the knitting yarn T
If the free end 3 of the rotating member 30 becomes extremely loose,
0B pivots downwardly as shown in FIG. 7, but its free end 30B remains in the position shown in FIG. 7 or a slightly more downwardly pivoted position. Therefore, the switch actuating member 35 is actuated to turn the switch 3
3 is OFF, it will never work. Even if the free end portion 30B is rotated to a position where it comes into contact with the switch actuating member 35, the resistance of the knitting yarn applied thereto is acting on the free end portion 30B, and the switch actuating member 35 has its own elasticity. Since the switch actuating member 35 is placed in the inactive position by the switch actuator 35, the switch actuating member 35 cannot be actuated.

In addition, since the pair of knitting yarn support pieces 17 and 18 are arranged close to each other and the gap 19 between them is set small, even if the knitting yarn T is slightly loosened,
The free end 30B of the pivoting member 30 remains in the generally upward position. It is part of gap 19,
This is because a frictional contact action between the knitting yarn T and the inner edge of each knitting yarn support piece 17, 18 and a resistance action that withstands bending of the knitting yarn T occur, and these actions cause the free end portion 30B to knit. It is supported on the thread T. In this case, the narrower the gap 19, that is, the closer it is to the diameter of the free end 30B, the more reliable the support becomes. This action is particularly effective when the rotating member 30
Since no tension is applied in the direction of switch operation, this is done more reliably and there is no problem with subsequent knitting. If tension is applied, even if the knitting yarn T is slightly loosened, the rotating member 30 will rotate downward, and here the knitting yarn T will be rotated downward.
will be spread over in a zigzag pattern, and during subsequent knitting, more tension than necessary will be temporarily applied to the knitting yarn T, which may cause the tension to become uneven and cause problems in knitting. .

[Effect of idea]

As described in detail above, the present invention is directed to a yarn breakage sensing device that includes a switch, a rotating member, and a knitting yarn support means, and in particular, the present invention is directed to a yarn breakage sensing device that includes a switch, a rotating member, and a knitting yarn support means. and a yarn guide plate extending in the running direction of the knitting yarn, and projecting horizontally from the lower edge of one side of the yarn guide plate in the vicinity of both sides of the free end of the rotating member, respectively. A pair of knitting yarn support pieces are integrally bent, and a yarn regulating piece that projects upward is integrally formed at the protruding end of each knitting yarn support piece.

Therefore, a yarn guide plate in which the pair of knitting yarn supporting pieces and the yarn regulating piece are integrally bent is adopted as the knitting yarn guiding means at the location where the free end portion of the rotating member is disposed. The configuration can be significantly simplified, and it can be manufactured extremely easily and at low cost. Furthermore, when setting the knitting yarn at this location, the knitting yarn need only be placed on the knitting yarn support piece from above, so the operation is extremely simple. Since the knitting yarn is trapped between the yarn guide plate and the yarn regulating piece, the knitting yarn will not accidentally escape from the knitting yarn supporting piece to the outside, and the free end of the rotating member will be placed on the knitting yarn. This provides excellent effects such as being able to securely place the parts.

[Brief explanation of the drawing]

1 to 7 show an embodiment embodying the present invention, in which FIG. 1 is a side view of the tension device, FIG. 2 is an exploded perspective view of the thread breakage sensing device, and FIG.
Figure 4 is a side sectional view of the main part of the thread breakage sensing device, Figure 4 is a front sectional view of the main part of the thread breakage sensing device, Figure 5 is a sectional view of the attachment part of the thread breakage sensing device, and Figures 6 and 7 are It is an action explanatory diagram. 14... Yarn guide plate, 17, 18... Knitting yarn support piece, 20... Yarn regulation piece, 30... Rotating member, 33
...Switch, B... Thread breakage sensing device, T... Knitting yarn.

Claims (1)

[Claims for Utility Model Registration] A switch for detecting the absence of the running knitting yarn; a pivoting member placed above the knitting yarn and pivoting downward to actuate the switch due to the absence of the knitting yarn;
a pair of knitting yarn support means each supporting a lower side of the knitting yarn in the vicinity of both sides of the position of the free end of the rotating member placed on the traveling knitting yarn. In the apparatus, a yarn guide plate is provided in the vicinity of the free end of the rotating member and extends in the running direction of the knitting yarn in a vertical state,
A pair of knitting yarn support pieces are integrally bent at the lower edge of one side of the yarn guide plate, and each of the pieces projects horizontally in the vicinity of both sides of the free end of the rotating member. A yarn breakage sensing device for a knitting machine, characterized in that yarn regulating pieces projecting upward are integrally formed at the protruding ends of the knitting yarn support pieces.