JPH0318540Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The present invention is designed to rotate according to knitting specifications such as knitting, tuck, and welting of a knitting machine such as a sock knitting machine or a circular knitting machine. The present invention relates to a cam actuating device for a knitting machine that moves the position of each knitting needle in a cylinder upward or downward.

(Prior art) A cam actuating device of a conventional knitting machine such as a sock knitting machine or a circular knitting machine moves the position of each knitting needle of a rotating cylinder upward or downward according to knitting specifications such as knitting, tuck, welting, etc. In order to do this, the knitting specifications such as knitting, tuckling, welting, etc. mentioned above are controlled by operating cams such as lowering cams and raising cams installed in the cam box, based on commands from the knitting program of a mechanical or electronic control device, for each of the rotating cylinders. The position of the knitting needles is moved upward or downward.

On the other hand, the cam actuating device of this type of knitting machine, such as a sock knitting machine or a circular knitting machine, which has already been proposed, moves the position of each knitting needle of the rotating cylinder upward according to knitting specifications such as knitting, tuck, and welt line. Or, in order to move it downward, it is constructed as shown in FIGS. 4 to 6 (Japanese Patent Laid-Open No. 146851/1983).

That is, in FIGS. 4 to 6, a rotating cylinder 1 is fitted in a machine frame (not shown) so as to be freely rotatable in a vertical direction, and a large number of vertical grooves 1a are formed on the outer periphery of this rotating cylinder 1. Each knitting needle 2 is connected to a plurality of coil springs 3 in this vertical groove 1a.
It is held in place and is fitted so as to be slidable in the vertical direction. Further, each frame body 5 is fixed with each mounting bolt to the holding member 4 which is integral with the machine frame, and each frame body 5 is provided with each step motor (three in the figure) 6. It is being Further, horizontal guide grooves 7 are formed in the middle of each frame 5, and each sliding member 8 is slidably fitted into each guide groove 7. Furthermore, each operating cam 9 is attached to the free end of each sliding member 8, and each operating cam 9 has a lifting cam 9 that lifts the butt 2a of the knitting needle 2 upward.
Lowering cam 9b that pushes down a and butt 2a
A lowering cam 9b that pushes down the butt 2a of the
It consists of two types.

On the other hand, each output shaft 6a of each step motor 6
Each rotary disk 10 is pivotally attached to the rotary disk 10, and each spiral groove 11 has approximately one turn on the end surface of each rotary disk 10, as shown in FIGS. 4 and 6. is formed, and each spiral groove 11 has a
Engagement pins 12 attached to the tail ends of each of the sliding members 8 are engaged with each other. Further, each step motor 6 is connected to an electronic control unit (central processing unit) 14 into which a knitting program is input via each lead wire 13.
is connected to.

Therefore, the cam operating device of the knitting machine described above controls the rotation of the step motor 6 when the step motor 6 is driven in the forward direction based on the knitting program input to the electronic control unit (central processing unit) 14. The disk 10 rotates approximately 180 degrees in the normal direction and then stops.
Then, the spiral groove 11 of the rotary disk 10 moves the engagement pin 12 to the left in FIG. Actuating cam 9 attached to the free end of
protrudes onto the rotation path of the butt 2a of the knitting needle 2, and this actuating cam 9 operates the butt 2a of the knitting needle 2 upward or downward to rotate the knitting according to the knitting specifications such as knitting, tuck, welt line, etc. The position of each knitting needle 2 of the cylinder 1 is moved in the vertical direction.

On the other hand, when the step motor 6 is driven in the opposite direction based on the knitting program input to the electronic control unit 14, the rotary disk 10 of the step motor 6 rotates approximately 180 degrees in the opposite direction and then stops. Then,
The spiral groove 11 of this rotating disk 10 is connected to the engagement pin 12.
moves to the right in FIG. The operating cam 9 deactivates the butt 2a of the knitting needle 2 and controls the position of each knitting needle 2 of the rotary cylinder 1 according to the knitting specifications. It's getting old.

(Problem to be Solved by the Invention) However, the cam actuating device of the knitting machine described above operates based on the knitting program inputted to the electronic control device 14, in synchronization with the rotation of the rotary cylinder 1, so that each actuating cam 9 Butt 2 of knitting needle 2 above
In theory, the engagement pin 12 that engages with the spiral groove 11 operates effectively because it protrudes or retreats onto the rotation path of the spiral groove a, but in reality, the spiral groove Since it is loosely engaged with the groove 11, when the engaging pin 12 is in contact with the operating cam 9, the operating cam 9 is not temporarily locked and the operating cam 9 is engaged with the butt 2a of the knitting needle 2.
Not only is it difficult to secure the position with high accuracy in a stable state due to positional deviation caused by stress, vibration, and impact from is difficult.

The present invention has been developed in view of the above-mentioned circumstances, and is based on a knitting program, in synchronization with the rotation of a rotating cylinder, each actuating cam is projected onto the rotating path of the butt of the knitting needle, or is retracted. Even if the actuating cam is subjected to stress, vibration, or impact from the butt of the knitting needle, the actuating cam is temporarily locked so as not to shift its position, and the position is ensured in a stable state with high precision. It is an object of the present invention to provide a cam actuating device for a knitting machine which has a simplified configuration and can be provided at low cost.

[Structure of the idea]

(Means for Solving the Problems and Their Effects) The present invention provides a circular knitting machine in which a rotary cylinder equipped with knitting needles is rotatably fitted in the machine frame, and a holding member of the machine frame located on the outer periphery of the knitting needles. A horizontal rod is slidably fitted into an integral cylindrical body, an operating cam is formed at the free end of the horizontal rod to operate the knitting needle, and a substantially L-shaped support is provided on the outer periphery of the cylindrical body. An intermediate member connected to the tail end of the horizontal rod via a connecting rod is pivoted to the middle of the support by a support shaft, and a cam portion is attached to a part of the intermediate member to connect the horizontal rod to the rear end of the horizontal rod. The tail end of the rod is formed to be pushed, an electromagnet is disposed at a right angle to the intermediate member at a lower part of the support, and an output shaft of the electromagnet is connected to the middle of the intermediate member, A coil spring is stretched between the output shaft of the electromagnet and the fixed member of the support body, and the actuation cam is activated in synchronization with the rotation of the rotary cylinder by turning the electromagnet ON and OFF based on the knitting program. The actuating cam is made to protrude or retract onto the rotation path of the butt of the knitting needle, and is temporarily locked so that the position does not shift even if the actuating cam receives stress from the butt of the knitting needle, thereby making it stable. In addition to being able to operate with high precision under certain conditions, the structure is simplified to facilitate assembly and adjustment, and to be provided at a low cost.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

In addition, the present invention will be described with the same reference numerals attached to the same constituent members as in the above-described specific example.

In FIGS. 1 to 3, reference numeral 1 denotes a rotary cylinder fitted in the machine frame so as to be rotatable in the vertical direction.
A large number of vertical grooves 1a are formed, and these vertical grooves 1a
Each knitting needle 2 is held by a plurality of coil springs 3 and fitted so as to be slidable in the vertical direction. Further, an auxiliary support 15 is fixed to a part of the ring-shaped holding member 4 that is integral with the machine frame with respective mounting bolts, and a pair of upper and lower positioning sensors 16 are attached to this auxiliary support 15. , 17 are attached. Further, the rotary cylinder 1 on which the pair of upper and lower positioning sensors 16 and 17 are located
There is only one origin indicating protrusion 1 on the lower outer periphery 1b of the
8 and a large number of positioning protrusions 19 corresponding to the number of knitting needles 2 are attached to each of the positioning sensors 16 and 17 facing each other.

That is, both positioning sensors 16 and 17 detect the start position of the rotary cylinder 1 and the position of a predetermined knitting needle 2 by an electronic control device (not shown) into which a knitting program is input, and regulate the positions.

On the other hand, on the outside of each knitting needle 2 located at the top of the rotating cylinder 1, a cylinder 20 that is integral with the holding member 4 is provided concentrically with respect to the rotating cylinder 1. In the middle of 20, a plurality of through holes 21 are horizontally bored.
Further, as shown in FIG. 1, approximately L-shaped supports 22 are attached to the outer periphery of the cylindrical body 20 where the through hole 21 is located. As shown in FIG. 1, a piston-shaped horizontal rod 23 is slidably fitted into each of the supports 22. As shown in FIG. Furthermore, an operating cam 24 for pushing the butt 2a of the knitting needle 2 is formed on the free end 23a of the horizontal rod 23.
The operating cam 24 is composed of two types: an upward cam 24a with an upward slope that pushes the knitting needle 2 up to the knit line, and a downward cam 24b with a downward slope that pushes the knitting needle 2 down to the welt line.
Furthermore, at the tail end 23b of the horizontal rod 23,
A substantially L-shaped intermediate actuation member 25 is connected via a connecting rod 26, and a base portion 25a of this intermediate actuation member 25 is rotatably pivoted to the middle of the support body 22 by a support shaft 27. ing. Further, as shown in FIG. 3, a cam surface 25b is formed on the upper part of the intermediate actuating member 25 so as to be able to push the tail end 23b of the horizontal rod 23. 2
A positioning adjustment screw 28 is brought into contact with the upper part of the intermediate actuating member 25 located on the opposite side of 5b, and this positioning adjustment screw 28 is connected to the support 22.
The intermediate actuating member 2 is attached to the fixing member 29 implanted in the
It is screwed to adjust the operating position of 5 and regulate the position. Furthermore, the support body 2 having an L-shape
2, an electromagnet 30 is provided at right angles to the intermediate member 25 and in a vertical direction. are connected. Furthermore, the output shaft 3 of this electromagnet 30
A coil spring 32 is stretched between Oa and the fixing member 29, and this coil spring 32
As shown in FIG. 2, when the electromagnet 30 is not excited, it pushes up the output shaft 30a and connects it to the horizontal rod 23 via the intermediate actuator 25 and connecting rod 26 connected thereto. An integral actuating cam 24 is moved forward onto the rotation path of the butt 2a of the knitting needle 2.

In particular, since each pin and support shaft 27 of the connecting rod 26 connected to the tail end 23b of the horizontal rod 23 are held on the virtual horizontal line of the horizontal rod 23, they are integral with the horizontal rod 23. Even if the operating cam 24 receives a pushing force from the butt 2a of the knitting needle 2, it can be temporarily locked. Furthermore, as shown in FIG. 3, when the electromagnet 30 is excited, the operating cam 24 integrated with the horizontal rod 23 retreats from the rotation path of the butt 2a of the knitting needle 2, but the tail end of the horizontal rod 23 The portion 23b, the cam surface 25b, and the support shaft 27 are held on the imaginary horizontal line of the horizontal rod 23 and are temporarily locked, so that the operating cam 24 integrated with the horizontal rod 23 is protected from external interference. Even if it receives vibrations, it will not move randomly or emit vibrations or noise.

The operation of the present invention will be explained below.

Therefore, in advance, both positioning sensors 16 and 17 detect the starting position of the rotary cylinder 1 and the position of a predetermined knitting needle 2 in an electronic control device into which the knitting program is input, and adjust the positions.

Next, if the electromagnet 30 is not excited based on the pulse signal from the knitting program of the electronic control device, as shown in FIGS. 1 and 2, the elasticity of the coil spring 32 causes the output shaft to
0a is pushed upward, and the operating cam 24 integrated with the horizontal rod 23 is advanced onto the rotation path of the butt 2a of the knitting needle 2 via the intermediate actuating member 25 and the connecting rod 26 connected thereto. , this operating cam 24 operates the butt 2a of the knitting needle 2 upward or downward.

On the other hand, when the electromagnet 30 is excited based on a pulse signal from the knitting program of the electronic control device, the output shaft 30a resists the elasticity of the coil spring 32, as shown in FIG. is pulled down, and the operating cam 24 integrated with the horizontal rod 23 is moved back onto the rotation path of the butt 2a of the knitting needle 2 via the intermediate actuating member 25 and connecting rod 26 connected thereto. This operating cam 24 does not operate the butt 2a of the knitting needle 2.

In particular, each pin of the connecting rod 26 connected to the tail end 23b of the horizontal rod 23 and the support shaft 27 are connected to the horizontal rod 23.
Since it is held located on the virtual horizontal line of
Even if the operating cam 24, which is integrated with the horizontal rod 23, receives the push force from the butt 2a of the knitting needle 2, it will be temporarily locked and there is no risk of it moving accidentally, so the operation of the operating cam 24 is ensured. Reliability can be improved.

[Effect of idea]

As described above, according to the present invention, in a circular knitting machine in which a rotary cylinder equipped with knitting needles is rotatably fitted in a machine frame, a cylindrical body integral with a holding member of the machine frame located on the outer periphery of the knitting needles is provided. A horizontal rod is slidably fitted in the horizontal rod, an operating cam is formed at the free end of the horizontal rod to operate the knitting needle, a substantially L-shaped support is attached to the outer periphery of the cylinder, and the An intermediate member connected to the tail end of the horizontal rod via a connecting rod is pivoted to the middle of the support by a support shaft, and a cam part is attached to a part of the intermediate member to connect the tail end of the horizontal rod. An electromagnet is disposed in the lower part of the support body perpendicularly to the intermediate member, an output shaft of the electromagnet is connected to the middle of the intermediate member, and the output shaft of the electromagnet and Since the coil spring is stretched between the fixed member of the support body, the cam can be operated in a stable state, and the structure can be simplified compared to the conventional one. Even if the knitting needle is subjected to stress from the butt of the knitting needle, it is temporarily locked so that the position does not shift, and the position can be secured in a stable state with high precision. Since the coil spring is stretched between the support member and the fixed member and is energized, when the electromagnet is not excited, the elasticity of the coil spring pushes the output shaft upward, and the intermediate actuating member and the link Since the actuating cam is forcibly advanced onto the rotating path of the butt of the knitting needle through the rod, the operation is reliable and has excellent effects such as improving the stability and reliability of the operation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the cam actuating device of the knitting machine of the present invention, Fig. 2 is a sectional view of the cam actuating device of the knitting machine of the present invention, and Fig. 3 is a diagram for explaining the operation of the present invention. 4 is a partially cutaway plan view of a cam actuating device for a knitting machine that has already been proposed, and FIG.
The sectional view shown above and FIG. 6 are plan views showing the main parts of a cam actuating device for a knitting machine that has already been proposed. DESCRIPTION OF SYMBOLS 1... Rotating cylinder, 2... Knitting needle, 4... Holding member, 20... Cylindrical body, 21... Through hole, 22...
Support body, 23... Horizontal rod, 24... Operating cam, 2
5... Intermediate operating member, 26... Connecting rod, 28... Adjusting screw rod, 30... Electromagnet.

Claims (1)

[Scope of utility model registration request] In a circular knitting machine in which a rotary cylinder equipped with knitting needles is rotatably fitted in a machine frame, a horizontal rod is slidably fitted in a cylindrical body integral with a holding member of the machine frame located outside the knitting needles. an operating cam formed to actuate the knitting needles at the free end of the horizontal rod, an approximately L-shaped support attached to the outer periphery of the cylinder, and a tail end of the horizontal rod. an intermediate member connected via a connecting rod and pivotally connected to the middle of the support by a support shaft; and a part of the intermediate member formed so as to push the tail end of the horizontal rod. an electromagnet disposed at a right angle to the intermediate member at the lower part of the support body, an output shaft of the electromagnet connected to the middle of the intermediate member, an output shaft of the electromagnet and the A cam actuating device for a knitting machine, comprising a coil spring stretched between a fixing member of a support body.