JP3048596B2 - Finger of needle selection device for knitting machine and needle selection method thereof - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a finger of a needle selection device for a piezoelectric knitting machine and a needle selection method thereof, and more particularly, to an improvement of a finger for needle selection and use thereof. The present invention relates to an improved technique for selecting a knitting needle of a knitting machine.

[Prior Art] and [Problems to be Solved] A needle selecting device is used in a knitting machine such as a circular knitting machine for knitting socks and the like. FIG. 13 shows an example of a circular knitting machine. The knitting cylinder 1 is provided with a needle selecting jack 2, and a knitting needle 3 is in contact with an upper portion of the jack 2. The yarn 4 is supplied to the knitting cylinder 1. Knitting cylinder 1
A needle selecting device 5 is provided at the lower part of the device, and the needle selecting device 5 is connected to a controller (not shown), and a pattern knitting procedure stored in a storage device such as a floppy disk is sent from the controller, The knitting needle 3 is moved up and down. That is, the needle selecting device 5 is generally used for transmitting the pattern knitting procedure to the vertical movement of the knitting needle 3.

An example of the needle selection operation of the needle selection device 5 will be described with reference to FIGS. 11 and 12. In pattern knitting, a needle selection jack in which bats 6 are protrudingly provided in a number of vertical grooves of the knitting cylinder 1. 2 (hereinafter simply referred to as a jack) is inserted by inserting the knitting needle 3 in contact with the jack 2 up and down, and the butt 6 of the jack 2 is selected by the finger 7 of the needle selecting device 5. The knitting needle 3 is selected by pressing the same.

As schematically shown in FIG. 11, the butt 6 of the jack 2
Is pressed in the direction of the knitting cylinder 1 so that the side opposite to the butt 6 of the jack 2 comes into contact with the knitting cylinder 1, the butt 7 of the jack 2 engages with the raising cam K at the bottom of the cylinder 1. Therefore, the knitting needle 3 abutting on the upper part of the jack 2 does not move upward, so that the knitting needle 3 does not form a stitch, but on the other hand, as shown in FIG. When the butt 6 of the jack 2 is not pressed, the jack 2 engages with the raising cam K to raise the knitting needle 3 in contact with the upper portion of the jack 2 to knit a stitch.

In the needle selection device, an electromagnetic type in which a finger is operated by an electromagnet has occupied the mainstream conventionally.
With the electromagnet, there is a limit in increasing the knitting speed (response speed of the needle selecting device), the power consumption is large, and the needle selecting device tends to be large.

On the other hand, conventionally, by applying a voltage to the piezoelectric element,
A piezoelectric needle selecting device that bends a piezoelectric body having the piezoelectric element to perform a needle selecting operation by a finger has also been proposed (Japanese Patent Application Laid-Open No. 62-28451). According to the needle device, there are advantages in that the response speed is faster, the power consumption is small, and the device can be made smaller, as compared with the electromagnetic needle selection device.

The present inventor has proposed that in such a piezoelectric needle selecting device,
A needle selection device as shown in FIGS.
−249967).

The needle selection device includes a metal plate 8 and a plate 8.
A piezoelectric body 10 having a piezoelectric element 9 made of a ceramic material, for example, made by firing barium titanate adhered thereon, is made to be able to bend as easily as possible. A fulcrum is provided at an intermediate position between the leading end and the trailing end of the piezoelectric body 10 that facilitates the bending movement.

That is, as shown in these figures, the spherical body 11 is attached to the front end of the piezoelectric body 10, and the spherical body 11 is inserted into the open end 70 at the rear end of the finger 7. Department
The finger 7 is made to be movable at an open end 70 at the rear end thereof, and the spherical body 12 similar to the above is also attached to the rear end of the piezoelectric body 10 so that the spherical body 12 The rear end of the piezoelectric body 10 is inserted into the groove 130 of the piezoelectric body rear end support portion 13 so that the rear end of the piezoelectric body 10 can move in the groove 130 of the support body S. An appropriate position between the rear end and the rear end is fixedly held by a rotating body 15 rotatably attached to the rotating body support portion 14 of the supporting body S, so that the intermediate fulcrum is provided.

Further, the finger 7 is connected to the tip of the piezoelectric body 11 in the same direction as the piezoelectric body 10, that is, in a straight line.

8 and 9 show the main parts, and the piezoelectric bodies 10 and the fingers 7 are arranged in multiple stages at appropriate intervals in the vertical direction. As shown in FIG. 10, the fingers 7 arranged in multiple stages at appropriate intervals in the vertical direction partially protrude from the opening 160 provided with a plurality of holes in the stopper 16 of the needle selecting device. However, as shown in FIGS. 8 and 9, the piezoelectric body 10 and the finger 7 can be integrated with the support S, and can be incorporated in a housing (described later) of the needle selecting device 5 in a cartridge type.

In this manner, the front end and the rear end of the piezoelectric body 10 can be moved by following the bending motion of the piezoelectric body 10, and
Even in the middle position of the front end portion and the rear end portion of the piezoelectric body 10, so as not to inhibit the bending motion by the rotation of the rotating body 15,
In addition, since the rotator 15 sandwiches the middle position of the piezoelectric body 10 and has a fulcrum in the middle, the needle selection speed can be remarkably improved as compared with the conventional device. The device was obtained.

In addition, since the bending motion of the piezoelectric body 10 is not hindered, the life of the piezoelectric body 10 is prolonged. Further, since the finger 7 and the piezoelectric body 10 are connected on the same straight line, the device is downsized. Thus, various advantages such as a low voltage applied to the piezoelectric element 9 can be obtained.

However, in this device, as shown in FIG. 8, the finger 7 is located at the center of the opening 160 of the stopper 16, so that the operation of the finger 7 is schematically shown in FIG. As shown in FIG.
The opening 160 is operated in obliquely upward and downward directions. That is, in the opening 160 of the stopper 16, such an operation is performed at the center of the vertical interval.

Then, the tip 7A of the finger 7 hits the butt 6 of the jack 2 as shown in FIG. 4, and the corner of the tip 7A of the finger 7 sometimes hits the bat 6. As described above, when the corner of the finger 7 hits the bat 6, the bat 6 may be damaged, and the needle selecting operation may be adversely affected.

In particular, in the piezoelectric method, the needle selection speed of the knitting machine is much higher than in the conventional method.
Hits the bat 6 and the impact is large, not only damaging the bat 6 but also damaging the finger 7. In addition, in such a high-speed knitting needle selection operation, the finger 7 cannot accurately press the bat 6, which may hinder accurate needle selection.

In order to avoid such a situation, the finger 7 presses the bat 6 of the jack 2 in the horizontal direction as shown in FIG. Then, as shown in FIG. 6, the center of the finger 7 and the center of the bat 6 of the jack 2 are aligned (leveling), and the finger 7 may be operated as shown in FIG. In this case, the condition that the stopper 7 of the finger 7 hits the stopper 16 differs, and when such leveling is performed, the finger 7
The upper and lower surfaces adhere to the stopper 16 where the oil film etc. has arrived,
The operation of the finger 7 may be braked.

In this case, as shown in FIG.
When the cut portion 161 is provided and the cut portion 161 is provided, the conditions for hitting the stopper 16 of the finger 7 can be made uniform. However, it is extremely difficult to cut the stopper 16 in this manner, which is practically impossible. is there.

Therefore, the present invention has been made to solve the above-mentioned drawbacks of the prior art, and it is possible to prevent damage to jacks and fingers, to enable fingers to perform a good needle selection operation, and to provide a stopper. The purpose of this is to make it possible to eliminate difficult processing.

Means for Solving the Problems According to the present invention, there is provided a piezoelectric device in which a voltage is applied to a piezoelectric body to activate a finger attached to a tip portion of the piezoelectric body to select a knitting needle in a knitting machine. When the tip of the finger presses the bat of the needle selection jack of the knitting machine horizontally on both upper and lower sides of the finger of the needle selection device for a knitting machine, A finger of a wire needle device for a piezoelectric knitting machine, characterized by being provided with a projection capable of reducing an area in contact with the stopper and preventing adhesion to the stopper; and In the needle selection method of the needle of the piezoelectric knitting machine in which the fingers attached to the tip of the body are operated to select the knitting needle in the knitting machine, the stopper of the needle selection device is used as the stopper. Top and bottom contact A finger provided with a projection which can reduce the area of contact with the stopper on both sides thereof and which can prevent adhesion to the stopper is disposed in the stopper, and the tip of the finger has a butt of a needle selection jack of the knitting machine. In a needle selecting method using a finger of a needle selecting device for a piezoelectric knitting machine, characterized in that the needle is pressed horizontally.

Example Next, an example of the present invention will be described with reference to the drawings.

FIG. 1A is a perspective view of a main part of a finger according to the present invention, FIG.
FIG. 1 is an operation description and a configuration diagram showing an embodiment of the present invention.

As shown in these figures, linear semicircular projections 700 are provided on both the upper and lower surfaces of the finger 7, in the lateral direction of the finger 7, and at positions where they contact the stopper 16.

The protrusion 700 is provided with a hole 7 formed in the finger 7.
Provided on both sides of 01. The hole 701 is provided to reduce the weight of the finger 7 and improve the operation speed of the finger 7.

As shown in FIG.
Two are provided. At the time of needle selection, the butt 6 of the jack 2 is pressed toward the knitting machine along the pressing angle of the notch 702 of the finger 7.

As shown in FIG. 2, the center of the bat 6 of the jack 2 and the center of the finger 7 are leveled so that the finger 7 presses the bat 6 horizontally.

This can be achieved, for example, by shifting the vertical position of the jack 2 with respect to the finger 7.

As shown in the figure, since the finger 7 is provided with the semicircular protrusion 700, the stopper 16 and the upper and lower surfaces of the finger come into point contact.

The stopper 16 does not require a cut as shown in FIG.

 According to the above configuration of the present invention, there are the following advantages.

That is, when the finger 7 is operated at the center of the opening 160 of the stopper 16 as shown in FIG.
As shown in FIG. 4, the bat 6 of the jack 2 is damaged,
5 and 6, the finger 7 and the bat 6 should be in a leveled state, and the finger 7 should be used to press the bat 6 horizontally. Thereby, the needle selection becomes accurate. However, when the leveling is performed in this manner, the finger 7 adheres to the stopper 16 to apply a brake to the needle selection operation, and the conditions under which the finger 7 hits the stopper 16 also differ. In this case, if the stopper 16 is provided with a cut portion 161 as shown in FIG. 7, the conditions can be made uniform, but such cut is extremely difficult.

According to the present invention, as shown in FIG. 2, even if the finger 7 and the bat 6 are leveled,
Since 0 is provided, the area where the finger 7 comes into contact with the stopper 16 is reduced, the adhesion to the stopper 16 is prevented, and the adhesion is prevented from applying a brake to the needle selection operation. The conditions for hitting the stopper 16 can also be adjusted by the presence of the protrusion 700,
There is no need to provide a difficult-to-machine cut portion 161 on the stopper 16 and the conventional stopper 16 can be used. In addition, the leveling of the finger 7 and the bat 6 allows the finger 7 to press the bat 6 horizontally. The bat 6, etc. can be prevented from being damaged and worn, and the needle selection operation can be kept good.

Thus, the present invention is very advantageous in all aspects.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and it is needless to say that various modifications can be made without departing from the gist of the invention. Nor.

For example, in the above-described embodiment, an example is described in which the protrusions of the fingers are configured in a semicircular shape, but as shown in FIG.
The projection 700 may be configured in a triangular shape, as shown in FIG. 1C, the projection 700 may be formed in a bowl shape, or as shown in FIG. 1D, the projection 700 may be an ellipsoid, Other modes may be used as long as the fingers and the stopper make point contact.

[Effects of the Invention] According to the present invention, the disadvantages of the prior art can be eliminated, the jacks and fingers can be prevented from being damaged, and the fingers can perform a good needle selection operation.
In addition, it was possible to eliminate the need for difficult processing on the stopper.

[Brief description of the drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention, FIG. 2 is an operation explanation and configuration diagram showing an embodiment of the present invention, FIGS. 3 to 7 are operation explanatory diagrams, respectively, and FIG. 9 is a sectional view of the main part of the needle selecting device, FIG. 9 is a perspective view of the main part of the stopper and the finger, FIGS. 11 and 12 are operation explanatory views, respectively, and FIG. 13 is a knitting machine. FIG. 2 ... needle selection jack 3 ... knitting needle 5 ... needle selection device 6 ... bat 7 ... finger 10 ... piezoelectric body 16 ... stopper 160 ... opening 700 ... projection

Claims (2)

(57) [Claims] 1. A needle selection device for a piezoelectric knitting machine, wherein a voltage is applied to a piezoelectric body to operate a finger attached to a tip portion of the piezoelectric body to select a knitting needle in a knitting machine. In the finger, when the tip of the finger presses the butt of the needle selection jack of the knitting machine horizontally on the upper and lower surfaces in contact with the stopper of the needle selection device, the area of contact with the stopper is reduced. A finger for a needle selection device for a piezoelectric knitting machine, comprising a projection which can prevent adhesion to a stopper. 2. A needle selection device for a piezoelectric knitting machine in which a voltage is applied to a piezoelectric body to operate a finger attached to a tip portion of the piezoelectric body to select a knitting needle in a knitting machine. In the needle selection method using the finger, a finger provided with a projection that can reduce the area in contact with the stopper and prevent adhesion to the stopper is provided on both surfaces in the vertical direction that contacts the stopper of the needle selection device. Wherein the tips of the fingers press the butt of the needle selection jack of the knitting machine horizontally, and the fingers of the needle selection device for a piezoelectric knitting machine are provided with fingers.