JPH08109554A - Actuator and its finger - Google Patents

Abstract

PURPOSE: To prevent the falling-off of a metallic part from a resin part even if an impact load is applied to the tip end of the metallic part in needle selection and avoid the adverse effect on the pin-insertion hole by using a finger having an integrated metallic part embedded in a resin part. CONSTITUTION: This actuator capable of performing the needle selection motion, etc., of a knitting needle of a knitting machine by driving a finger 9 with a driving apparatus is produced by integrating a metallic part 22 with a resin part 23 having a pin-insertion hole 20, embedding a part of the metallic part 22 in the resin part 23 and inserting a pin 21 into the pin-insertion hole 20 of the resin part 23 of the produced finger 9 to support the finger 9 on a supporting member 19, wherein an end of the metallic part 22 is brought into contact with the pin 21 inserted into the pin-insertion hole 20. The finger is constructed by embedding the resin part so as to expose an end of the metallic part at the pin-insertion hole of the resin part. Even if an impact load is applied to the tip end of the metallic part in needle selection, the shock and load are received by the pin to prevent the falling-off of the metallic part and avoid the adverse effect on the pin-insertion hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator capable of performing a needle selecting operation of a knitting needle of a knitting machine and a finger thereof.

[0002]

2. Description of the Related Art In a knitting machine such as a sock circular knitting machine, a needle selecting device (needle selecting actuator) is used to perform a needle selecting operation of the knitting needle. To explain one example thereof, as shown in FIG. 7, a large number of needle selecting devices 3 for controlling the vertical movement of the knitting needles 2 arranged in the knitting cylinder-1 are arranged around the knitting cylinder-1. The needle device 3 is connected to the patterning controller 4, the pattern knitting procedure is sent from the patterning controller 4, and the knitting needle 2 is moved up and down to perform pattern knitting of socks. Although not shown here, a large number of needle selection jacks provided with protruding bats are arranged below the knitting needles 2, and a large number of knitting needles 2 are brought into contact with the upper portions of the jacks so that the yarn 5 Is supplied from the bobbin 6, and the needle selecting device 3 is caused to act on the needle selecting jack to move the knitting needle 2 up and down as described above to perform knit knitting of socks. Note that the needle selecting device 3 may directly act on the knitting needle 2.

As shown in FIG. 3, one example of the needle selecting device 3 is that a piezoelectric body 7 is supported in multiple stages on a support body 8, a finger 9 is attached to an end portion of the piezoelectric body 7, and a tip portion of the finger 9 is attached. The knitting needle 2 is selected by projecting it from the opening 11 of the stopper portion 10 of the support 8 and pressing or not pressing the pad as described above. The piezoelectric body 7 in the needle selecting device 3 is, for example, as shown in FIG. 6, a ceramic made by firing zirconic acid-lead titanate (P.Z.T.) or the like on both surfaces of the shim material 12. It is composed of a bimorph type piezoelectric body formed by sticking a piezoelectric element 13 made of a material. When a voltage (pulse) is applied to the piezoelectric element, distortion occurs or mechanical stress is generated. The mechanical vibration due to such a piezoelectric phenomenon is used to select the knitting needle, and as shown in the drawing, the piezoelectric body 7 is operated from the patterning controller 4 via the lead wire 14, and the finger By the operation of 9, the knitting needle 2 is selected. Although the piezoelectric driving method is described here, an electromagnetic driving method or the like is also available.

As an example of the needle selection operation, a piezoelectric pressing method will be described. When a voltage is applied from the patterning controller 4 to the piezoelectric element 13 through the lead wire 14 as shown in FIG. 6B. (Or when a positive pulse is applied)
To bend the piezoelectric body 7 with the fingers 9 facing downwards,
Since the butt 16 of the needle selection jack 15 is not pressed,
The needle selection jack 15 maintains the vertical position, and as a result, the raising cam butt 17 at the lower end of the needle selection jack 15 engages with the raising cam 18, and the needle selection jack 15 and the knitting needle 2 that abuts above it are raised. The movement is effected, and as a result, the formation of the stitch by the knitting needle 2 is performed. On the other hand, as shown in FIG. 6 (A), when no voltage is applied (or when a negative pulse is applied), the piezoelectric body 7 does not bend, and therefore the butt 16 of the needle selection jack 15 is pressed. Therefore, the raising cam butt 17 at the lower end of the needle selection jack 15 is raised by the raising cam 1.
No mesh operation is given to the mesh needle 2 that is not engaged with the needle 8 and is in contact with the needle selection jack 15 above.

The finger 9 used in the above-mentioned needle selecting device supports the middle position of the finger 9 on the finger support portion 19 of the support body 8 as shown in FIGS. 3 and 2 (A). It works as a fulcrum. In order to operate the finger 9 in this way, a pin insertion hole [pin hinge portion (through hole)] 20 is provided in the width direction of the finger 9 at an intermediate position of the finger 9, and the pin of the finger 9 is formed. As shown in FIG. 2 (A), a shaft (pin) 21 is inserted into the insertion hole 20, and both ends of the pin 21 are inserted into the holes of the left and right end walls of the finger support portion 19, and the middle position of the finger 9 is inserted. Is fixed to the finger support portion 19.

Conventionally, in order to reduce the cost and the weight of the finger 9 in constructing the finger 9, FIG.
As shown in (A), the whole is not made of metal, but is made up of a metal portion 22 and a resin portion 23, and the metal portion 22 and the resin portion 23 having the pin insertion hole 20 are integrated, In some cases, one end of the metal portion 22 is embedded in the resin portion 23. However, when one end of the metal part 22 is embedded in the resin part 23 and integrated as described above, the metal and the resin are originally an inorganic substance and an organic substance, and therefore their adhesiveness is poor and they are separated at their interface. Tends to be easy. In particular, without using an adhesive, for example, when the metal part and the resin part are integrated with each other by resin molding, there is a tendency that they are more easily peeled off. Therefore, the metal portion 22 is provided with a hole 24 for strengthening the fixing with the resin, or as shown in FIG. 5B, a protruding portion 25 is provided at the end portion of the metal portion 22. Then, the fixing with the resin is strengthened, but in any case, the metal portion 22 falls off from the resin portion 23 and falls off. The inventors of the present invention diligently studied the reason for this, and in the conventional finger 9, the resin is interposed between the one end edge of the metal portion 22 and the pin insertion hole 20 (pin 21) inside the resin portion 23. As described above, when the needle is selected, a large impact is applied to the tip of the metal part 22 in the horizontal direction, and a large load is applied to the tip of the metal part 22 in the vertical direction. The load affects the resin interposed between the one end edge of the metal part 22 and the pin insertion hole 20 (pin 21), causing a crack in the resin part 23 in contact with the one end edge of the metal part 22. It has been found that the metal portion 22 falls off from the resin portion 23 and causes the metal portion 22 to fall off. Further, in the conventional finger, the pin insertion hole 20 gradually changes due to long-term use.
The diameter X of the metal part 22 may increase, which may adversely affect the device.
It was also found that it was caused by the wide interposition of resin between 1). In other words, in the above-mentioned conventional finger, the resin corresponding to the soft gum is hit by a hard metal, the gum is broken, and the metal part falls out, which further adversely affects the pin insertion hole 20 in the rear part. become.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a technique capable of solving the drawbacks of the prior art. Other objects and novel features of the present invention will be apparent from the entire description of the specification and the accompanying drawings.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a pin of a resin portion of a finger in which a metal portion and a resin portion having a pin insertion hole are integrated and a part of the metal portion is embedded in the resin portion. In an actuator capable of inserting a pin into an insertion hole to support the finger on a support and driving the finger with a drive device to perform a needle selecting operation of a knitting needle of a knitting machine, An actuator formed by bringing the end of the metal part into contact with the pin inserted in the pin insertion hole of the resin part of the finger, and a finger used in the actuator, wherein the end of the metal part is The present invention relates to a finger, wherein a metal part is embedded in the resin part so as to be exposed in a pin insertion hole of the resin part and is integrated with the resin part.

[0009]

In the present invention, even if the finger embeds the metal part in the resin part and integrates them, the end part of the metal part is in contact with the pin inserted in the pin insertion hole of the resin part. Therefore, even if an impact load is applied to the tip of the metal part during needle selection, the pin receives the impact and load. Therefore, in the conventional finger, resin is interposed between the end of the metal part and the pin. However, impact and load are concentrated on the resin portion to cause a crack, and eventually the metal portion in the resin has fallen off from the resin portion, but this can be prevented. In addition, the pin receives and relieves shocks and loads,
It is also possible to avoid the influence on the pin insertion hole and to prevent the pin insertion hole from expanding as in the conventional case.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. 1A is a sectional view showing an embodiment of the present invention, and FIG. 1B is a perspective view showing an embodiment of the present invention. As illustrated, the metal portion 22 is embedded in the resin portion 23 and the metal portion 22 and the resin portion 23 are integrated.
A pin insertion hole 20 is provided in the resin portion 23. Then, the pin 21 inserted into the pin insertion hole 20 of the finger 9 and one end edge of the metal portion 22 are brought into contact with each other. The finger 9 can be configured by embedding the metal portion 22 in the resin portion 23 so that one end edge of the metal portion 22 is exposed in the pin insertion hole 20 of the resin portion 23 and integrated. To embed and integrate the metal part 22 in the resin part 23, for example, the resin molding method as described above may be used.
Is fixed to the mold, and the resin is molded to form the resin portion 23.
Can be formed and integrated. The finger 9 has a resin portion 23 of the pin insertion hole 20 so that one end edge of the metal portion 22 is exposed in the pin insertion hole 20 of the resin portion 23.
An opening may be provided on the wall surface according to the size of the metal portion 22. 2 (B) and 2 (C) are cross-sectional views showing another embodiment of the present invention. In this embodiment, the above-mentioned embodiment has a round pin insertion hole 20. An example in which the pin insertion hole 20 has a rectangular shape is shown. FIG. 2B shows a state in which the pin 21 is attached,
(C) shows a state before inserting the pin 21. In addition, the pins 21 inserted into these pin insertion holes 20 are not circular,
It may be configured in a rectangular shape. The pin 21 is made of metal.

Next, an embodiment of the needle selecting device to which the present invention is applied will be further described with reference to FIG. The pin 21 is inserted into the pin insertion hole 20 of the finger 9 and is supported by the finger support portion 19 of the box-shaped support 8 as described above.
As shown in the drawing, spherical bodies 26 are attached to the front end and the rear end of the piezoelectric body 7, respectively. The spherical body 26 attached to the tip of the piezoelectric body 7 is attached to the U-shaped groove 27 at the rear end of the finger 9.
To allow the spherical portion of the spherical body 26 to rotate within the rear end of the finger 9. The spherical body 26 attached to the rear end of the piezoelectric body 7 is attached to the support 8
It is fitted into the groove 29 of the piezoelectric body mounting portion 28 so that the spherical portion of the spherical body 26 can rotate in the groove 29 of the piezoelectric body mounting portion 28. Further, as shown in the figure, the rotating body 30 is attached at a position midway between the rear end portion and the front end portion of the piezoelectric body 7.
The rotating body 30 is made of resin, and is fixed to the piezoelectric body 7 by injection molding of resin, for example. Both ends of the rotating body 30 are rotatably installed in the holes formed in the rotating body mounting portion (halfway fulcrum portion) 31 of the support body 8. A through hole having a size that allows the piezoelectric body 7 to be inserted therein may be provided in the rotating body 30, the piezoelectric body 1 may be inserted into the through hole of the rotating body 30, and may be fixed in the through hole by an adhesive or the like. As described above, according to the piezoelectric needle selecting device in which the front end portion and the rear end portion of the piezoelectric body 7 are movable, and the intermediate fulcrum is provided at the midway position of the piezoelectric body 7, the conventional needle selecting method using the piezoelectric method is provided. The needle selection speed can be significantly increased compared to the device and the electromagnetic needle selection device. As described above, the fingers 9 are attached to the end portions of the piezoelectric body 7, the piezoelectric body 7 is supported in multiple stages on the support body 8, and the tips of the metal portions 22 of the fingers 9 are connected to the stopper portion 10 of the support body 8. Project from the opening 11 of
The knitting needles 2 are selected from the patterning controller 4 via the lead wires 14.

As described above, by making one end edge of the metal portion 22 and the pin 21 inserted in the pin insertion hole 20 contact each other, the tip of the metal portion 22 is moved so that the tip portion of the metal portion 22 is selected. Even if it hits the needle selection jack 15 at a high speed and receives an impact load, the pin 21 supported by the finger support portion 19 receives the impact and the load, so that the metal portion 22 in the resin portion 23 is replaced by the resin portion 23. The pin 2 supported by the finger support portion 19 can be prevented from falling off.
1, the impact and the load are received and alleviated, so that the adverse effect on the pin insertion hole 20 can be avoided.

Although the invention made by the present invention has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say. In the present invention, the hole 24 for strengthening the fixing between the metal portion 22 and the resin portion 23 is provided, and the protruding portion 25 is provided at the end portion of the metal portion 22 so as to strengthen the fixing with the resin. May be. In the present invention, as shown in FIGS. 4 (A) and 4 (B), in the metal portion 22, in addition to the hole 24 for strengthening the fixing to the resin portion 23, the fall prevention groove 32 is further provided. A hole 24 for preventing falling off against a shock or a load, and for strengthening fixing with the resin portion 23.
In addition to this, a hook portion 33 is provided at the end portion, and the end portion of the metal portion 22 including the hook portion 33 is brought into contact with the pin 21 inserted inside the hook portion 33, so that the impact is further increased. It can be prevented from falling off against a load and a load, and is particularly effective against a shock and a load from the vertical direction as shown in FIG.

The present invention can be applied not only to the needle selecting device by the press method of the piezoelectric driving method but also to the electromagnetic driving method. The needle selecting device (needle selecting actuator) according to the present invention can be applied to various knitting machines such as sock knitting machines. In the circular knitting machine, the needle plate, that is, the knitting cylinder, rotates with respect to the machine base of the circular knitting machine, and the needle selection device is fixedly provided on the machine base of the circular knitting machine. When the needle selecting device according to the present invention is used in a circular knitting machine, when the individual fingers of the needle selecting device fixed to the machine stand are activated, the knitting needle finger butt in the rotating knitting cylinder is used. Alternatively, it is necessary that the knitting needle is configured so as to contact the lower end of the knitting needle. On the other hand, the needle selection device (needle selection actuator) according to the present invention,
It can also be used for flat knitting machines. In a flat knitting machine, a needle plate is fixedly provided on a machine base of the flat knitting machine, and a carriage including a needle selecting device and a yarn supplying device slides along the needle plate to knit a pattern knitted fabric. Therefore, when the carriage slides, the tip portion of the finger of the needle selecting device operates and contacts the finger butt of the knitting needle in the fixed needle plate or the lower end of the knitting needle. It must be configured to abut the finger butt of the jack that is placed.

In addition to the needle selecting device, the present invention can be applied to various devices such as a warp control device of a loom, machines, and parts.

[0016]

As described above, according to the present invention, by using the finger in which the metal part is embedded in the resin part and integrated with each other, at the time of needle selection,
Even if an impact load is applied to the tip of the metal part, the pin receives the impact and load, thus preventing the metal part from falling off from the resin part as in the past, and the pin also prevents impact and load. Since it is received and alleviated, adverse effects on the pin insertion hole can be avoided, frequent finger replacement and machine maintenance as in the past are not required, and the drive operation of the finger of the needle selection device is smooth. can do.

[Brief description of drawings]

FIG. 1A is a sectional view showing an embodiment of the present invention, and FIG.
Is a perspective view showing an embodiment of the present invention,

2A is a sectional view of a finger supporting form showing an embodiment of the present invention, FIG. 2B is a sectional view showing another embodiment of the present invention, which is a sectional view after pin insertion, and FIG. FIG. 3 is a cross-sectional view showing another embodiment of the invention, which is a sectional view before pin insertion

FIG. 3 is a configuration diagram of a needle selection device showing an embodiment of the present invention,

4A is a metal part configuration diagram showing another embodiment of the present invention, and FIG. 4B is a metal part configuration diagram showing still another embodiment of the present invention.

5A is a sectional view of a conventional example, FIG. 5B is an explanatory view showing another example of the conventional example, FIG.

6A and 6B are operation explanatory views of the needle selection device,

FIG. 7 is a block diagram of a knitting machine,

[Explanation of symbols]

 1 ... Knitting cylinder-2 ... Knitting needle 3 ... Needle selection device 4 ... Controller 5 ... Thread 6 ... Bobbin 7 ... Piezoelectric body 8 ... Support body 9 ...・ Finger 10 ・ ・ ・ Stopper part 11 ・ ・ ・ Opening part 12 ・ ・ ・ Shim material 13 ・ ・ ・ Piezoelectric element 14 ・ ・ ・ Lead wire 15 ・ ・ ・ Needle selection jack 16 ・ ・ ・ Bat 17 ・ ・ ・ Lift cam Bat 18 ... Lifting cam 19 ... Finger support 20 ... Pin insertion hole 21 ... Pin 22 ... Metal part 23 ... Resin part 24 ... Hole 25 ... Projection Part 26 ... Spherical body 27 ... U-shaped groove 28 ... Piezoelectric body mounting part 29 ... Groove part 30 ... Rotating body 31 ... Rotating body mounting part 32 ... Fall prevention groove 33 ... Hook X: Hole diameter

Claims (3)

[Claims] 1. A pin is inserted into a pin insertion hole of a resin portion of a finger in which a metal portion and a resin portion having a pin insertion hole are integrated and a part of the metal portion is embedded in the resin portion. Then, in an actuator capable of supporting the finger on a support and driving the finger by a driving device to perform a needle selecting operation of a knitting needle of a knitting machine,
An actuator formed by bringing an end portion of the metal portion into contact with the pin inserted into the pin insertion hole of the resin portion of the finger. 2. The finger used in the actuator according to claim 1, wherein the metal part is embedded and integrated in the resin part so that an end of the metal part is exposed in a pin insertion hole of the resin part. Fingers for actuators characterized by the following. 3. The finger is a press-type finger which is driven by a piezoelectric driving device to select a knitting needle of a knitting machine by pressing or non-pressing a needle selection jack or a mesh needle. The finger of the actuator according to 2.