JP2547396Y2 - Hand knitting machine carriage - Google Patents

Description

[Detailed description of the invention]

[Industrial applications]

The present invention relates to a carriage of a hand knitting machine for selecting a needle by using an electromagnetic force (hereinafter, referred to as an electromagnetic needle), and more particularly to a carriage of a hand knitting machine capable of automatically detecting cutting of a knitting yarn.

[Prior art]

The present applicant has already proposed a carriage described in Japanese Utility Model Laid-Open No. 2-131585 as an electromagnetic needle type hand knitting machine carriage capable of easily performing intarsia knitting. In this hand knitting machine carriage, a fixed needle selecting cam (a chevron cam) and a movable sorter which sorts a knitting needle bat into front and rear passages by turning on / off an electromagnet in cooperation with the needle select cam. An electromagnetic needle selection section made of a member is provided at the center of the carriage base plate, and a clue is provided at a front position facing the electromagnetic needle selection section. In this carriage, the needle selection by the electromagnetic needle selection unit allows the knitting needle to be sorted into a knockover position and a knockout position.

[Problems to be solved by the invention]

If the knitting yarn is cut (yarn broken) during knitting by this carriage, if the operator continues knitting work without noticing it, if the knitting yarn is sorted to the knockover position by the needle selection action of the electromagnetic needle selection unit, Until then, the knitted fabric knitted could fall off from the knitting yarn. SUMMARY OF THE INVENTION It is an object of the present invention to accurately detect a thread break with a simple configuration and prevent the knitted fabric from falling off simultaneously with the thread break.

[Means for Solving the Problems]

The carriage of the present invention is provided with a knitting thread insertion hole through which the knitting yarn is inserted near the front end of the knitting yarn facing the electromagnetic needle selecting portion, and the knitting yarn passes through the knitting yarn insertion hole. A knitting yarn sensing member that is moved by the knitting yarn against the urging force of the spring when the knitting yarn is inserted is attached to the carriage beside the knitting yarn insertion portion, and further, an electrical connection is made with the movement of the knitting yarn sensing member. And a switch for turning on and off the electromagnet to detect the presence or absence of the knitting yarn in the knitting yarn insertion portion, and restricting the electromagnet to an off state when the knitting yarn runs out.

[Action]

When the knitting yarn is cut and pulled out of the knitting yarn insertion hole, the knitting yarn detecting member is returned and moved by the spring, and the switch is switched to detect the yarn breakage. This detection can be performed at the same time as the needle selecting operation of the electromagnetic needle selecting section, so that the knitting needle can be guided to the passage side not knocked over at the same time as the yarn breakage.

【Example】

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway plan view of a carriage 1 of a thick yarn hand knitting machine, and FIG. 2 is a partial rear view thereof. A front partition 4 forming the front 3, a rear partition 6 forming the rear needle rest path 5 at the rear, left and right main cams 7, and left and right switching guide cams 8 located inside these main cams 7 and capable of switching between two positions. There are provided left and right switching cams 9 which can be switched to three positions, outer left and right end cams (side cams) 10 and left and right opening / closing cams 11 located on the outer side.
Are provided integrally. Further, on the carriage base plate 2, at the rear of the chevron cams 12, a lower-surface horizontally long hexagonal selection cam 13 opposed thereto is mounted so as to be able to move back and forth, and a short knitting needle 14 for sorting these knitting needles 14 one by one is used. Sorting passage
15 is formed. Further, the carriage base plate 2 is provided with left and right distribution cams 16 on the left and right sides of the sorting passage 15, and further provided with left and right guide cams 17 integrally therewith. At both left and right ends of the rear partition 6, left and right end cams 18 are provided integrally, which partially protrude from the left and right ends of the carriage base plate 2. A cylindrical cap 20 integrally formed of a synthetic resin is non-rotatably mounted on the bat 19 of the knitting needle 14. cap
On the top surface of 19, a horizontally long hexagonal distribution projection 21 is integrally provided in the circular area. The front and rear surfaces of the distribution projection 21 are parallel planes along a line orthogonal to the axis of the knitting needle 14, but both left and right end surfaces are front and rear slopes that are triangular. The sorting cam 13 is fixed to the lower side of the front end of the vertical front and rear operation plate 16 made of a magnetic material, and forms a single sorting member 17 with this.
The front and rear operation plate 17 is urged forward by a spring (not shown). By this bias, the sorting cam 13 is normally held at the front position shown by the chain line in FIG. A pair of left and right electromagnets 18 are fixed to the carriage base plate 2 on both left and right sides of the front and rear operation plate 17, and the knitting needles 14 are sorted (needle) back and forth in the same manner as described in Japanese Utility Model Laid-Open No. 2-131585. . That is, when the knitting needle bat 19 enters the selection passage 15 along one slope of the chevron cam 12 while retracting the selection cam 13 against the spring, when the electromagnet 18 is turned on, the selection cam
13 is held in the retracted position, so that the knitting needle butt 19
Is guided to the rear knitting passage a as shown in FIG.
On the other hand, if the electromagnet 18 is turned off when entering the selection passage 15, the knitting needle bat 19 is pushed forward by the selection cam 13 to move forward as the selection cam 13 is returned by the spring. Along the other slope of the front knitting path b
Guided to. At the needle selection position of the electromagnetic needle selection unit configured as described above, that is, at a front position opposed to the short selection passage 15, a yarn mouth 22 is provided on the carriage base plate 2 or a yarn body attached thereto. The thread 22 is inserted through the thread slot 24. Further, a knitting yarn insertion hole 25 is provided near the front of the yarn opening 22, and the knitting yarn 23 is further inserted into the knitting yarn insertion hole 25 via the yarn opening 22. Next to the knitting yarn insertion hole 25, a sheath-like portion 26 continuous therewith is provided.
A spool-shaped knitting yarn sensing member is provided in the sheath portion 26.
27 is fitted to be able to swing left and right. This knitting yarn sensing member
27 is urged forward by the coil-shaped spring 28 toward the knitting yarn insertion hole 25, and when the knitting yarn 23 is not inserted into the knitting yarn insertion hole 25, the tip of the knitting yarn detecting member 28 is moved to the position shown in FIG. As shown in the drawing, it comes into pressure contact with a knitting yarn guide rod 29 penetrating the knitting yarn insertion hole 25. Outside the sheath 26, an electrical switch 33 is provided which is activated by the projection 32 of the knitting yarn sensing member 28 through the slit 30 of the sheath 26. When the knitting yarn 23 passing through the yarn mouth 22 is passing through the knitting yarn insertion hole 25, the knitting yarn 23 is inserted into the knitting yarn sensing member 27 and the knitting yarn guide rod in the knitting yarn insertion hole 25 as shown in FIG. 29, the knitting yarn sensing member 27 is retracted by the thickness of the knitting yarn 23, and the switch 30 is pressed by the projection 32 of the knitting yarn sensing member 28 to be turned on (or off). . When the knitting yarn 23 is cut and the knitting yarn insertion hole 25 is pulled out, the knitting yarn detecting member 27 returns forward to a position where it comes into pressure contact with the knitting yarn guide rod 29.
The protruding portion 31 is disengaged from the switch 32, and the switch 32 is turned off (or turned on). When the switch 32 is switched in this manner, the cutting of the knitting yarn 23 is electrically detected, the electromagnet 18 is restrained in the off state, and the breaking of the yarn is notified by a notification means such as a buzzer or a lamp.

[Effect of the invention]

According to the present invention, the yarn breakage is detected and the electromagnet of the electromagnetic needle section is restrained to the OFF state at the same time as the yarn breakage. After the yarn breakage, the knitting needle can be guided to the passage side where knockover is not performed. The knitted fabric can be prevented from falling off. In addition, yarn breakage can be accurately detected with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an example of a carriage of a hand knitting machine according to the present invention, and FIG. 2 is a rear view of a part thereof. 1 ... Carriage, 12 ... Yamagata cam (cam for needle selection), 17
... sorting member, 18 ... electromagnet, 22 ... thread opening, 23 ... knitting thread, 25 ... knitting thread insertion hole, 27 ... knitting thread sensing member, 32 ... switch.

Claims (1)

(57) [Scope of request for utility model registration] An electromagnetic needle comprising: a fixed needle selecting cam; and a movable member for moving the knitting needle bat into front and rear paths by turning on and off an electromagnet in cooperation with the needle selecting cam. In a carriage of a hand knitting machine having a portion, and also provided with a yarn mouth at a front position facing the electromagnetic needle selecting portion, a knitting yarn insertion hole through which the knitting yarn is inserted through the yarn mouth is provided in the vicinity of the yarn mouth. A knitting yarn sensing member, which is moved by the knitting yarn against the urging force of the spring when the knitting yarn is inserted through the knitting yarn insertion hole, is attached to the carriage beside the knitting yarn insertion portion, Furthermore, it is electrically turned on with the movement of the knitting yarn sensing member.
A carriage for a hand-knitting machine, comprising: a switch for turning off the knitting yarn to detect the presence or absence of a knitting yarn in a knitting yarn insertion portion and for restricting the electromagnet to an off state when the knitting yarn runs out.