JPH0359187B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) 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 wire selection needle device for a knitting machine that 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. It is configured as shown in .

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 vertical grooves 2 are formed in the axial direction, and in each of the vertical grooves 2, well-known jacks 3 having respective butts 3a are slidably moved to move knitting needles (not shown) up and down. is fitted in. Further, a box-shaped support frame 4 is fixed to the base (machine frame main body) near the knitting machine cylinder 1, and a back plate 5 of this support frame 4 is attached as shown in FIG. As shown in FIG. 2, at least a pair of upper and lower holders 6 and 7 each having a tuning-fork shape in cross section are arranged so as to be cantilevered and horizontal to the axis of the knitting machine cylinder 1. The 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, and each 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 the upper and lower surfaces of each actuator 10a, 10b are as follows.
Each actuator 10 is guided by a guide surface at the tip of each of the holders 6 and 7.
The tips of the needle selection levers 11a and 10b are fitted with nuts 8a for the adjustment screws so that there is no gap between the abutting portions 11a and 11b of the needle selection levers 11 when the needle selection levers 11 swing toward each other, which will be described later. It is designed to be finely adjusted by screwing in. Furthermore, magnets 12a and 12b, such as permanent magnets, are embedded in the outer ends of the holders 6 and 7 beside the actuators 10a and 10b, respectively.
2a and 12b are adapted to attract the needle selection lever 11.

On the other hand, a plurality of T-shaped needle selection levers 11 are pivotally attached to the support frame 4 near the jack 3 having each of the butts 3a so as to be swingable by a pin shaft 13. Each contact portion 11 of the lever 11
a, 11b are each actuator 10a, 10b and each magnet 1, as shown in FIGS. 9 and 10.
2a and 12b, respectively, 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. , this select finger 11c is,
It is attached so as to selectively push each butt 3a of the jack 3.

Therefore, in the above-mentioned piezoelectric needle selection device for a knitting machine, when the circular knitting machine is operated, the knitting machine cylinder 1 rotates at high speed, and the numerous jacks 3 attached to the outer periphery of the knitting machine cylinder 1 also rotate at high speed. Rotate.

On the other hand, by alternately applying pulse signals to the laminated piezoelectric elements 8 and 9 based on a patterning signal inputted in advance to a patterning control device (not shown) of the circular knitting machine, One of the laminated piezoelectric elements (8) impulsively converts the electric energy applied with the pulse voltage into mechanical energy, expands to about 20 to 50 microns, and impulsively pushes the one actuator 10a; This actuator 10a is the contact portion 11
a is pushed against the attraction force of the magnet 12a, and since no pulse voltage is applied to the other laminated piezoelectric element 9, the needle selection lever 11 swings around the pin shaft 13, and this needle selection lever 11 select fingers 11c selectively push each butt 3a of the jack 3 shown in the figure, and slide knitting needles (not shown) in the vertical direction, thereby creating a pattern in the stockinette knitting. .

(Problem to be Solved by the Invention) However, the above-mentioned knitting needle selection device must incorporate at least a pair (one set is shown) of upper and lower laminated piezoelectric elements 8 and 9 into the limited and narrow support frame 4. Not only that, but the actuators 12a and 12b of both laminated piezoelectric elements 8 and 9 swing the needle selection lever 11 around the pin shaft 13, and the needle selection lever 11 moves each butt of the jack 3. 3a is pushed indirectly, which increases the number of components and causes time lag.
This causes disadvantages such as not being able to achieve a sufficiently high speed of needle selection operation, and furthermore, the needle selection lever 11 must be replaced 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 and narrow support frame, expands the operating amount of the actuator of this laminated piezoelectric element, and also: By changing the direction and directly pushing each cross on the jack, the number of laminated piezoelectric elements can be reduced to 1/2, and by following this, the number of other components can be reduced and high-speed operation can be achieved. It is an object of the present invention to provide a piezoelectric needle selection device for a knitting machine that can perform a certain needle selection operation stably and reliably.

[Structure of the invention]

(Means for Solving the Problems) In the present invention, each jack is fitted into a knitting machine cylinder so as to move each knitting needle up and down, and each jack is selectively moved by a piezoelectric element provided beside the knitting machine cylinder. In a circular knitting machine which is adapted to be pushed by a first hinge part and a first support part are formed at the base of the holding body, and a laminated piezoelectric element is interposed between the collar part of the first support part and the tip jaw part of the holding body. , a second hinge portion and a second support portion are formed beside the tip flange portion, an actuator is attached to the tip portion of the holder so as to directly push the butt of the jack, and the laminated piezoelectric By applying a pulse voltage to the element, the electrical energy of this laminated piezoelectric element is converted into mechanical energy, and at the same time, the operating amount of this mechanical energy is expanded by lever means and the direction is changed to raise the butt of the jack. By directly pushing and moving the butt from the selected position to the non-selected position, the amount of operation is sufficiently expanded, and the expanding operation is performed at high speed and stably and reliably, thereby preventing disturbances in pattern development. , with the aim of 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 will be described with the same reference numerals assigned to the same constituent members as those in the above-described specific example.

1 to 8, reference numeral 1 denotes a knitting machine cylinder rotatably provided on the base of a circular knitting machine, and the outer periphery of this knitting machine cylinder 1 has many vertical grooves (needle grooves). 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. Further, a box-shaped support frame 4 is fixed to the base (machine frame main body) near the upper and lower knitting machine cylinder 1 with respective mounting bolts 5, and a back plate 6 of this 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. It is provided so that the length of the mounting position can be adjusted with each mounting nut 22 via the adjustment cylinder 21. Further, as shown enlarged in FIGS. 4 and 8, the base of the holding body 20 inside the back plate 6 is provided with a cut groove for the first hinge portion 20a to serve as a fulcrum. Each support portion 20b is formed on the holder 20 beside the first hinge portion 20a so that the first support portion 20b serves 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 a tip flange 20e is formed at the tip 20d of both the holding bodies 20. Further, between the tip flange 20e and the flange 20c, laminated piezoelectric elements 23 having respective lead wires 23a are arranged horizontally and interposed, and the laminated piezoelectric elements 23 receive a pulse voltage. By applying a voltage, this expands and contracts, and the holder 20 holding the laminated piezoelectric element 23
Focusing on the support portion 20b, the first hinge portion 20
a is used as a fulcrum to swing in the vertical direction, and the fulcrum of this first hinge portion 20a and the first
When the distance from the force point of the support part 20b is set to "1", the distance from the fulcrum of the first hinge part 20a to the actuator 24, which will be described later, has an enlargement ratio of about 16 times,
The amount of operation of each actuator 24 is increased.

On the other hand, the tips 20d of both holders 20 have
The second hinge portion 20f is formed with a cut groove so as to serve as a fulcrum, and the second support portion 20g is formed on the holder 20 beside the second hinge portion 20f so that the second support portion 20g serves as a point of effort. It is formed. or,
The tip 20d is the butt 3a of the jack 3.
The actuating direction is changed so as to be pushed approximately at right angles, and moreover, directly, and the actuating direction is changed so as to be twice enlarged and displaced.

On the other hand, a notch is formed in the distal end 20d of the holder 20, and an L-shaped actuator 24 is attached to the notch in the longitudinal direction of the holder 20 with a set screw 25. There is. In addition, the above-mentioned holding body 2
Each stopper 26 coated with a vibration absorbing material is attached to the support frame 4 located at the tip 20d of the holder 2.
It is provided to regulate the range of oscillation of 0,
Each stopper 26 is designed to regulate the position and absorb impact noise when activated.

On the other hand, in FIGS. 1, 5 to 7,
A cam holder 28 that is integral with the support table 27 is provided on the substrate near the butt 3a, and a cam portion 2 of a ring-shaped raising cam member 29 is attached to the inner peripheral edge of the cam holder 28.
9a is fixed to push up the butt 3a. Further, as shown in FIGS. 5 to 7, a part of the upper surface of this raising cam member 29 has a
A push cam member 30 having an arc shape is attached to the jack 3.
The pushing cam member 30 and the raising cam member 29 work together to push the lower part of the jack 3 outward, and at the same time, push the lower part of the jack 3 outward. It seems to be pushed upwards. Furthermore, as shown in FIG. 2, a cam guide member 31 having an L-shaped cross section is provided on the base plate below the support frame 4.
A permanent magnet 32 and a magnetic plate 33 made of a magnetic material are fixed to the inner circumferential portion of the magnet 13 with set screws, and the permanent magnet 32 is provided so as to attract the lower part of the magnet 13 mentioned above.

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

Therefore, when the circular knitting machine is in operation, the knitting machine cylinder 1 rotates at high speed, and the numerous jacks 3 attached to the outer periphery 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 multilayer piezoelectric element 23 is controlled by applying a pulse signal to the multilayer piezoelectric element 23 based on a pattern control signal inputted in advance to a pattern control device (not shown) of the circular knitting machine. is expanded by an electrical signal of the resonance frequency of the positive electrode (+), so the holder 20 that holds the laminated piezoelectric element 23 uses the first support portion 20b as the point of effort and the first hinge portion 20a as the fulcrum. While rotating upward, the distal end portion 20d of the holding body 20 uses the second support portion 20g as a point of force, and the second hinge portion 2
Since the actuator 24 rotates approximately perpendicularly in the front-rear direction using 0f as a fulcrum, as described above, the actuator 24 operates greatly at an enlargement ratio of about 1 times or more, and directly pushes the butt 3a. As a result, the butt 3a moves from the selected position to the non-selected position, and does not selectively push up the knitting needles (not shown) that are linked thereto.

Therefore, when a pulse signal is not applied to the laminated piezoelectric element 23, that is, when no pulse voltage is applied, the actuator 24 also does not operate, so that the butt 3a of the jack 3 acts as the lifting cam of the push cam member 30. It is pushed up by the cooperative action with member 29a, and interlocking knitting needles (not shown) slide in the vertical direction, thereby creating a pattern in the stockinette knitting.

Note that the actuator 24 has a double movement indicator and a stopper 2.
6 to return to the normal position.

〔Effect of the invention〕

As described above, according to the present invention, each jack is fitted into the 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. 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. Not only does it eliminate the need for the needle selection lever built into the model, 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 operating time 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 front 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 explaining the operation 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, 20f...Second
Hinge part, 20g... Second support part, 23... Laminated piezoelectric element, 24... Actuator, 26... Stopper, 32... Permanent magnet.

Claims (1)

[Claims] 1. In a circular knitting machine in which 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 the base outside the knitting machine cylinder, and the base of the holder is provided on the support frame so that it can be adjusted horizontally toward the axial direction of the knitting machine cylinder. A first hinge portion and a first support portion are formed at the base, a laminated piezoelectric element is interposed between the jaw portion of the first support portion and the tip jaw portion of the holder, and a laminated piezoelectric element is interposed beside the tip jaw portion. A piezoelectric needle selection device for a knitting machine, characterized in that a second hinge portion and a second support portion are formed on the holder, and an actuator is attached to the tip of the holder so as to directly push the butt of the jack. .