JPH02307948A - Piezoelectric needle-selecting device for knitting machine - Google Patents

Abstract

PURPOSE:To stably and surely perform a needle-selecting motion to prevent the disorder phenomenon of a patterning work by assembling a laminate type piezoelectric element in a narrow supporting frame and pressing the butt of each jack through a lever means. CONSTITUTION:The base portion of a holder 20 is horizontally disposed in a supporting frame 4 and an working element 24 is equipped so as to directly press the butt of a jack 3 through a laminate type piezoelectric element 23. The movement of mechanical energy produced by the application of the pulse voltage of the piezoelectric element is widened by a lever action at the hinge portion and supporting portion of the holder 20 and also subjected to the change of the direction to sufficiently enlarge the movement for transferring the butt 3a of the jack from a selected position to a non-selected position.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a multilayer piezoelectric element that is incorporated into a circular knitting machine such as an electronic pattern circular knitting machine or a sock knitting machine. This invention relates to an incorporated piezoelectric needle selection device for knitting machines.

(Prior Art) A piezoelectric needle selection device for a knitting machine, which has already been proposed and is incorporated into a circular knitting machine such as an electronic patterning circular knitting machine or a sock knitting machine, is shown in FIGS. 9 and 10. Constructed as shown.

That is, in a piezoelectric needle selection device for a knitting machine that is incorporated into a circular knitting machine, as shown in FIGS. 9 and 10, there is a , a large number of longitudinal grooves 2 are formed in the axial direction, and each longitudinal groove 2 has a known jack 3 having a respective butt 3a.
is slidably fitted so that the knitting needle (not shown) can be moved up and down. Further, on the substrate (machine frame main body) I near the knitting machine cylinder 1, there is a support frame 4 formed in a box shape.
is fixed to the back plate 5 of the support frame 4, and a first
As shown in Fig. 0, at least a pair of upper and lower holders 6.7 each having a tuning fork-shaped cross section are cantilevered and horizontal to the axis of the knitting machine cylinder 1. The knitting machine cylinder 1 is provided so that its opening is closed toward the axis of the cylinder 1, and the length of the mounting position can be adjusted using an adjustment screw nut 8a. Furthermore, each laminated piezoelectric element 8.9 is installed horizontally in each pair of holders 6.7, and each tip of each laminated piezoelectric element 8.9 has a Actuator 10a.

10b is attached.

That is, each actuator 10a, 10b is attached to each tip of each of the laminated piezoelectric elements 8, 9, and each of the upper and lower surfaces of each actuator 10a, 10b is connected to each of the above-mentioned holders 6, 7. It is designed to be guided by the guide surface at the tip of the
Each actuator 10a.

The tip of the needle selection lever 10b is slightly tightened by screwing in the adjustment screw nut 8a so that there is no gap between the abutment parts 11a and llb of each needle selection lever 11 when the needle selection levers 11 swing toward each other, which will be described later. It is being adjusted. Furthermore, each of the above-mentioned holders 6 beside these actuators 10a and 10b
．． 7, each magnet 12a, 12b, such as a permanent magnet, is embedded in each outer end of the magnet 12a, 12b.
, 12b are designed to attract the needle selection lever 11.

On the other hand, a plurality of T-shaped needle selection levers 1 are provided on the support frame 4 near the jack 3 having the respective rosettes 3a.
1 is rotatably pivoted by a pin shaft 13, and each contact portion 11a of this needle selection lever 11.

11b is each actuator 10a, 10b and each magnet 12a, as shown in FIGS. 9 and 10.

12b, and one end of the needle selection lever 11 forms a selection finger 11c made of a hard material such as cemented carbide or fine ceramics. The select finger 11c is attached to selectively push each butt 3a of the jack 3.

Therefore, in the piezoelectric needle selection device for a knitting machine described above, when the circular knitting machine is operated, the knitting machine cylinder 1 rotates at high speed, and a large number of jacks 3 are mounted on the outer periphery of the knitting machine cylinder 1.
also rotates together.

On the other hand, the pattern control device (not shown) of the circular knitting machine is equipped with
By alternately applying a pulse signal to each of the laminated piezoelectric elements 8.9 based on a pattern pattern signal inputted in advance, one of the laminated piezoelectric elements 8 receives electrical energy to which a pulse voltage is applied. The impact is converted into mechanical energy, elongated to about 20 to 50 microns, and the above-mentioned one actuator 10a is impulsively pushed, and this actuator 10a attracts the contact portion 11a to the attraction force of the magnet 12a. Since the other laminated piezoelectric element 9 is not applied with a pulse voltage, the needle selection lever 11 swings around the pin shaft 13, and the selection finger 11c of the needle selection lever 11 moves as shown in the figure. By selectively pushing each butt 3a of the jack 3, knitting needles (not shown) are slid in the vertical direction, thereby creating a pattern in stockinette knitting.

(Problems to be Solved by the Invention) However, the piezoelectric needle selection device for a knitting machine described above has at least one upper and lower pair (- pair shown) of laminated piezoelectric elements 8.9 in a limited and narrow support frame 4. Not only must the needle selection lever 11 be swung around the pin shaft 13 by the actuators 12a and 12b of both the laminated piezoelectric elements 8 and 9, and the needle selection lever 11 can be used to connect the jack 3 with the needle selection lever 11. Because each butt 3a of the There are drawbacks such as the need to replace the needle lever 11 due to wear.

The present invention has been made in view of the above-mentioned circumstances, and incorporates a laminated piezoelectric element into a limited narrow support frame.
The number of laminated piezoelectric elements is reduced to 1/2 by increasing the amount of operation of the actuator of this laminated piezoelectric element, and at the same time, by changing the direction and directly pushing each butt of the jack, In accordance with this, it is an object of the present invention to provide a piezoelectric needle selection device for a knitting machine that is capable of stably and reliably performing a high-speed needle selection operation while reducing the number of other components.

[Structure of the invention]

(Means for Solving the Problems) The present invention includes fitting each jack into a knitting machine cylinder so as to move each knitting needle up and down, and selectively connecting each jack with a piezoelectric element provided beside the knitting machine cylinder. In a circular knitting machine which is adapted to be pushed by a first hinge portion and a first support portion are formed at the base of the holding body;
A laminated piezoelectric element is interposed between the flange of the first support part and the tip flange of the holder, and a second hinge part and a second support part are formed beside the tip flange. An actuator is attached to the tip of the holder so as to directly push the butt of the jack, and by applying a pulse voltage to the laminated piezoelectric element, the electrical energy of the laminated piezoelectric element is converted into mechanical energy. At the same time, the operating amount of this mechanical energy is expanded by means of a lever and the direction is changed to directly push the butt of each jack and move the butt from the selected position to the non-selected position. The amount is sufficiently expanded, the expansion operation is performed at high speed, and stably and reliably, thereby preventing irregularities in pattern development, and at the same time improving quality.

(Example) Hereinafter, an illustrated example in which the present invention is applied to a circular knitting machine will be described.

Note that the present invention includes the same constituent members as those in the above-mentioned specific example.
The same reference numerals will be used for explanation.

1 to 8, reference numeral 1 denotes a knitting machine cylinder rotatably provided on a base l of a circular knitting machine. ) 2 are formed in the axial direction, and a jack 3 having each butt 3a is slidably fitted into each longitudinal groove 2 so as to move a knitting needle (not shown) up and down. or,
A box-shaped support frame 4 is fixed to the base (machine frame main body) near the knitting machine cylinder 1 with bolts 5, and a back plate 6 of the support frame 4 As shown in FIGS. 2 to 8, a plurality of holders 20 are cantilevered and arranged horizontally in parallel with respect to the axial direction of the knitting machine cylinder 1, and these holders 20 are adjustable. Each attachment is provided via the cylindrical body 21 so that the length of the attachment position can be adjusted with a nut 22. Further, as shown enlarged in FIGS. 3 and 8, the base of the holder 20 inside the back plate 6 is provided with a cut groove for the first hinge portion 20a to serve as a fulcrum. This first hinge portion 2
A first support portion 20b is formed on the holding body 20 beside 0a so as to serve as a point of effort. Furthermore, a collar portion 2 is provided on the holding body 20 beside the first support portion 20b.
0c is formed, and the tip portion 20d of the holding body 20
A tip flange portion 20e is formed at the tip. Further, each lead wire 2 is connected between this tip flange 20e and the flange 20c.
Laminated piezoelectric elements 23 having 3a are arranged horizontally and are interposed respectively, and by applying a pulse voltage, this laminated piezoelectric element 23 expands and contracts, and the above-mentioned holder that holds this laminated piezoelectric element 23 expands and contracts. 20 is configured to swing in the vertical direction with the first support portion 20b as a point of effort and the first hinge portion 20a as a fulcrum, and the fulcrum of the first hinge portion 20a and the first support portion 20b are When the distance from the point of force is "1", the distance between the fulcrum of the first hinge portion 20a and the actuator 24, which will be described later, becomes an expansion ratio of about 16 times, and the amount of operation of each actuator 24 is increased. There is.

On the other hand, a second hinge portion 2Of is formed with a cut groove on the tip portion 20d of the holder 20 so as to serve as a fulcrum. is formed so that the second support portion 20g is the point of emphasis. Further, the tip portion 20d is formed so as to change its operating direction so as to directly push the rose 3a of the jack 3 at a substantially right angle, and to be twice enlarged and displaced.

To the west, a cutout is formed at the tip 20d of the holder 20, and an L-shaped actuator 24 is attached to the cutout in the longitudinal direction of the holder 20 with a set screw 25. ing. Further, each stopper 26 coated with a vibration absorbing material is provided on the support frame 4 located at the tip 20d of the holder 20.
are provided to restrict the range of swing of the holding body 20, and each stopper 26 restricts the position and absorbs impact noise when activated.

On the other hand, in FIG. A cam portion 29a of a ring-shaped lifting cam member 29 is fixed to the peripheral edge so as to push up the bat 3a. In addition, this raising cam member 2
As shown in FIGS. 5 to 7, a push cam member 30 having an arcuate shape is attached to a part of the upper surface of the jack 9 so as to push the lower part of the jack 3 outward. The pushing cam member 30 and the raising cam member 29 work together to push the lower part of the jack 3 outward and push it upward at the same time. Furthermore, a cam guide member 31 having an L-shaped cross section is provided at the lower part of the support frame 4 of the board I, as shown in FIG. A permanent magnet 32 and a magnetic plate 33 made of a magnetic material are fixed to the part with set screws, and the permanent magnet 32 is provided so as to attract the lower part of the jack 3.

Hereinafter, the effects of the present invention will be explained.

Therefore, when the circular knitting machine is operated, the knitting machine cylinder 1 rotates at a high speed, and the multiple jacks 3 attached to the outer circumference of the knitting machine cylinder 1 also rotate. Then, the lower part of the jack 3 is pushed outward by the push cam member 30 and rotates together with the knitting machine cylinder 1 while being attracted by the permanent magnet 32.

On the other hand, the pattern control device (not shown) of the circular knitting machine is equipped with
By energizing the laminated piezoelectric element 23 with a pulse signal based on the pattern pattern signal inputted in advance, the laminated piezoelectric element 23 is expanded by the electrical signal having the resonance frequency of the positive electrode (+). The holder 20 that holds the laminated piezoelectric element 23 focuses on the first support portion 20b,
While rotating upward about the first hinge part 20a, the tip part 20d of the holding body 20 is connected to the second support part 20a.
Since the force point is 0g and the second hinge portion 2Of is used as a fulcrum, the actuator 24 is rotated substantially at right angles in the front and back direction, so as mentioned above, the actuator 24 operates greatly at an enlargement ratio of about 16 times or more, and also directly As a result, the butt 3a is moved from the selected position to the non-selected position, and the knitting needles (not shown) that are linked thereto are not selectively pushed up.

Therefore, when the pulse signal is not energized to the laminated piezoelectric element 23, that is, when the pulse voltage is not applied,
Since the actuator 24 also does not operate, the butt 3a of the jack 3 is pushed up by the joint action of the pushing cam member 30 and the cam portion 29a of the raising cam member 29, and the linked knitting needle (not shown) is pushed up and down. It slides, and this creates a pattern on stockinette knitting.

The actuator 24 is adapted to return to its home position by a stopper 26 during the backward movement.

〔Effect of the invention〕

As described above, according to the present invention, each jack is fitted into the knitting machine cylinder so that each knitting needle moves up and down, and each jack is selectively pushed by a piezoelectric element provided beside the knitting machine cylinder. In the circular knitting machine, a support frame is provided on a base outside the knitting machine cylinder, and the base of the holder is installed horizontally on the support frame with the base of the holder facing in the axial direction of the knitting machine cylinder. , a first hinge portion and a first support portion are formed at the base of the holder, a laminated piezoelectric element is interposed between the flange of the first support portion and the tip flange of the holder; A second hinge portion and a second support portion are formed beside the tip flange portion, and an actuator is attached to the tip portion of the holder so as to directly push the butt of the jack, so that Not only does the needle selection lever built into the example become unnecessary, but the number of laminated piezoelectric elements can be reduced to 1/2, and since the actuator is actuated directly to the butt of the jack, the time during actuation is reduced. It is possible to eliminate the loss and perform a stable and reliable needle selection operation at high speed.The operating direction of the actuator can be changed from the vertical direction to the longitudinal direction, and the operating amount is doubled. It has excellent effects such as being able to convert.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the main parts of the voltage needle selection device for knitting machines of the present invention, FIG. 2 is a longitudinal sectional view of the same, and FIG. 3 is a cross-sectional view showing only the main parts of the invention 4 is a cross-sectional view of the same as above, FIG. 5 is a perspective view of the raising cam member incorporated in the present invention, FIGS. 6 and 7 are respective views for detailed explanation of the present invention, FIG. 8 is an exploded perspective view of the present invention, FIG. 9 is a plan view showing essential parts of a piezoelectric needle selection device for a knitting machine that has already been proposed, and FIG. 10 is a longitudinal sectional view of the same. 1...knitting machine cylinder, 3...jack, 4...
Support frame body, 20... Holding body, 20a... First hinge part, 20b... First support part, 2Of... Second hinge part, 20g... Second support part, 23...・Laminated piezoelectric element, 24... actuator, 26... stopper, 32...
·permanent magnet. Applicant's agent Mr. Sato Figure 3 Figure 9

Claims (1)

[Claims] In a circular knitting machine, each jack is fitted into a knitting machine cylinder so as to move each knitting needle up and down, and each jack is selectively pushed by a piezoelectric element provided beside the knitting machine cylinder. A support frame is provided on a base outside the knitting machine cylinder, and the base of the holder is provided on the support frame so as to be horizontal and adjustable in the axial direction of the knitting machine cylinder,
A first hinge part and a first support part are formed at the base of the holding body, a laminated piezoelectric element is interposed between the jaw part of the first support part and the tip jaw part of the holding body, A knitting machine, characterized in that a second hinge part and a second support part are formed beside the jaw part, and an actuator is attached to the tip of the holder so as to directly push the butt of the jack. Piezoelectric needle selection device.