JPS59172361A - Filament cutter - Google Patents

Abstract

PURPOSE:To retain the end portion of cut filament with a retaining member brought into pressure contact with a backplate by moving a plunger of an electromagnetic solenoid to cut running filament with an edge tool, and then keeping the moving state of the plunger with a small current. CONSTITUTION:Filament 21 unwound from an unwinding reel is loaded among a contact member 17, an edge tool 19 and a retaining member 20. When the filament 21 is cut, an output electric signal of a filament break detector is changed to LOW, and a transistor Q2 is turned on the feed driving current Vd to an electromagnetic solenoid 12, so that the plunger 13 is moved. When a transistor Q1 is turned on, a current I limited by a resistor R2 is supplied to the electromagnetic solenoid 12. A movable holder 15 is moved by drive of the solenoid 12, and the filament 21 is cut and clamped and held by the contact member 17 and the retaining member 20 to be prevented from hanging down during the supply of current I.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a yarn cutting device that runs from a rewind reel to a take-up reel.

Prior Art After the yarn for spinning is rewound from the unwinding reel and subjected to desired processing by a processing device, it is wound onto the reel again and supplied to the next process. If the yarn is cut on the take-up reel side during running, the yarn is cut on the unwind side in order to prevent the yarn from getting caught in the drive shaft of the processing device. Conventionally, as shown in FIG. 1, a cutting device used for the above purpose is placed on the winding side and drives an electromagnetic solenoid 1 based on an electric signal output from a thread breakage detector that detects thread breakage. The plunger 2 is moved to the position shown by the broken line in the figure, and the running ray 3 is pressed against the blade 5 fixed to the frame 4 to cut it, and the cut thread end is transferred to the plunger. 2, the boulder 6 is fixed to the frame 4 according to the drive of the holder 6, and an elastically deformable spring member 7 is pressed against the holder 6.
During running, thread waste and the like tend to adhere between the holder 6 and the spring member 7, and there is a problem in that the thread 3 cannot be reliably held under pressure. Therefore, the hanging yarn 3 had a tendency to be wound around a drive shaft of a processing device or the like.

Purpose of the Invention The purpose of the present invention is to take into consideration the above-mentioned drawbacks of the conventional art, and to cut a traveling yarn using a simple structure, securely hold the cut end of the yarn, and prevent the yarn from being wound around a processing device or the like. It is an object of the present invention to provide a yarn cutting device that can prevent jamming.

Composition of the invention Hereinafter, the present invention will be explained according to one embodiment.

FIG. 2 is an explanatory diagram showing an outline of the yarn cutting device according to the present invention, and FIG. 3 is a plan view of the road body in FIG. 2.

In the figure, an electromagnetic solenoid 12 is fixed to the frame 11,
A plunger 13 is attached to the electromagnetic solenoid 12 so as to be movable in the left and right directions in the figure.

A movable holder 15 is attached to the end of the plunger 13 and is movable in the horizontal direction in the drawing along a support shaft 14 fixed to the frame 11. In addition, 16 in the figure is a coil spring interposed in the plunger 13 between the movable holder 15 and the electromagnetic solenoid 12.

A holder 18 is fixed to the frame 11 above the electromagnetic solenoid 12 and has a cutter 19 (described later) and a contact member 17 to which a holding member 20 is pressed.

A cutter 19 having a cutting edge on the electromagnetic solenoid 12 (on the right side in the figure) and a holding member 20 made of an elastically deformable spring plate that comes into pressure contact with the abutment member 17 are fixed to the movable holder 15, respectively.

Next, the operation of one embodiment will be explained with reference to FIGS. 4 and 5.

The yarn 21 rewound from the unwinding reel passes through the notch 11a formed in the frame 11 to the contact member 17 and the cutter 19.
and the holding member 20, and is stretched onto a take-up reel II+ (none of which is shown) via a processing device or the like. When the yarn 21 is cut on the winding side, when the electric signal A output from the yarn breakage detector (not shown) disposed on the winding side changes to L'OW, the transistor Q1 turns on. A control current Vc is applied to the one-shot circuit 22 as well as to the base of transistor Q3. 1) The one-shot circuit 22 (No. 11) applies a base electromagnetic force having a time constant set by the capacitor C1 and the resistor R1 to the base of the transistor Q2, and when the transistor Q2 is turned on, the electromagnetic solenoid 12
A drive current Vd is supplied to move the plunger 13 to the position shown in FIG. 5 against the spring force of the coil spring 16. Note that when the transistor Q1 is turned on, the transistor Q3 is turned on, and the current I limited by the resistor R2 is supplied to the electromagnetic solenoid 12.

Then, the movable holder 15 is moved by the electromagnetic solenoid driven by the noid 12.
is moved to the position shown in FIG.
is cut by the pressure contact between the contact member 17 and the cutter 19, and the cut end of the yarn 21' is held under pressure by the single pressure contact between the contact member 17 and the holding member 20.

After the time constant has elapsed, the transistor Q2 is turned off, but the transistor Q3 is turned on to continue supplying the current (2) to the electromagnetic solenoid 12, so that the moving state of the plunger 13 shown in FIG. 5 is maintained. That is, yarn 2
The cut end portion of the cut end portion 1 is held under pressure by the abutting member 17 and the holding member 20.

Therefore, in this embodiment, when the thread breakage detector changes to LOW,
During the time constant set by the one-shot circuit 22, the electromagnetic solenoid 12 is driven to press the blade 19 against the contact member 17 according to the movement of the plunger 13, and the thread 2
1, and the cut end of the thread 21 is attached to the abutting member 1.
7 and the holding member 20 to hold it under pressure and prevent it from hanging down.

Also, after the above time constant has elapsed, the electromagnetic solenoid 12 has a resistance R.
The current ■ limited by 2 is supplied, and the plunger 1
3 is maintained, the yarn 21 is held under pressure by the abutment member 17 and the holding member 20.

DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention comprises: an electromagnetic solenoid fixed to a frame and moving a plunger; a movable member movably supported with respect to the frame according to the movement of the plunger; and a movable member attached to the movable member. a holding member that is attached to the movable member and is elastically deformable; and a contact plate that is attached to the frame and is pressed against the h5J cutler and the holding member as the plunger moves, and is heated for a predetermined time. During this time, the plunger is moved by a large current supplied to the electromagnetic solenoid, and the running yarn is held in pressure contact with the abutting plate and the holding member while being cut with a knife.
A simple structure in which the moving state of the plunger is maintained by a small current supplied to the current solenoid, and the end of the cut yarn is held by the holding member pressed against the contact plate, allows the running yarn to be held. This is a yarn cutting device that can cut the yarn, securely hold the yarn at the cut end, and prevent the yarn from being caught in a processing device or the like.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional example, FIG. 2 is an explanatory diagram schematically showing the "A position" for cutting the striations according to the present invention, FIG. 3 is a plan view of the road body in FIG. 2, and FIG. 5 is an explanatory diagram showing the operating state of the electromagnetic solenoid. In the figure, 11 is a frame, 12 is an electromagnetic solenoid, 13 is a plunger, 15 is a movable member, 17 is a contact plate, 19 is a cutter, 20 is a holding member, 21 is a light stripe. Patent applicant Perfect Co., Ltd.

Claims (1)

[Claims] 1. An electromagnetic solenoid that is fixed to a frame and moves in the axial direction of the plunger; a movable member that is movably supported with respect to the frame according to the movement of the plunger; and an electromagnetic solenoid that is attached to the movable member. a blade; a holding member attached to the movable member 1r11 and capable of elastic deformation; and a holding member attached to the frame and configured to move m according to the movement of the plunger.
It is equipped with a cutter marked J, and a contact plate to which the holding member is pressed, and for a predetermined period of time, the plunger is moved by a large current supplied to an electromagnetic solenoid, and the contact plate of the number 1rtl, the cutter, and the holding member are moved. After cutting the thread running between the threads with a blade while being pinched and held between the contact plate and the holding member, the moving state of the plunger is maintained by a small current supplied to a current solenoid, and the plunger is pressed against the contact plate. A yarn cutting device characterized in that an end of the cut yarn is held by a holding member.