JPH0650554Y2 - Needle selection device for knitting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a needle selecting device for a knitting machine, and more particularly to a needle selecting device for knitting needles when knitting a pattern in an electronic pattern sock knitting machine or the like.

[Prior Art] and “Problems to be Solved” As shown in FIGS. 4 to 7, when knitting a knitted fabric in a pattern knitting machine, a large number of vertical grooves 2 on the outer periphery of a knitting cylinder 1 are formed. A needle selection jack (hereinafter simply referred to as a jack) 4 having a butt 3 protruding therein is inserted so that the knitting needle 5 that abuts the jack 4 is moved up and down, and the butt 3 of the jack 4 is selected. Needle selection fingers (needle selection levers) (hereinafter simply referred to as fingers) 7 of the needle device 6 are selectively pressed to select the knitting needles 5. That is, the fingers 7 make a fifth selection. As shown schematically in the figure, when the butt 3 of the jack 4 is pressed in the direction of the knitting cylinder 1 and the side surface of the jack 4 opposite to the bat 3 is brought into contact with the knitting cylinder 1,
The butt 3 of the jack 4 cannot be engaged with the raising cam 8 below the contact cylinder 1, so that the knitting needle 5 abutting on the upper portion of the jack 4 does not move upward, and as a result, the knitting needle 5 On the other hand, when the butt 3 of the jack 4 is not pressed as shown in FIG. 6, the stitches are not formed, but the jack 4 engages with the raising cam 8 and hits the upper portion of the jack 4. The knitting needles 5 in contact with each other are raised to knit a stitch.

The above engagement or disengagement of the finger 7 with the jack 4 is performed at an extremely high speed, and the demand for the higher speed has recently been increasing. It collides with the wall of the ship with great momentum. In the needle selecting operation, the pushing speed of the finger 7 with respect to the bat 3 of the jack 4 is required to be constant in each of the patterned bats 3,
If there is a difference in the pushing speed, the knitting action may be disturbed.

Further, when the operation is not properly performed, the jack 4 may be broken in the middle (hereinafter referred to as a middle break).

In the conventional needle selecting device, as shown in FIG. 8, each butt contact surface 9 of the plurality of fingers 7 protruding from the needle selecting device 6
The angle of contact with the bat is the same in the vertical direction, and as described above, during the needle selection operation, a center fold is likely to occur, it takes a lot of time for its replacement work, and the pushing speed is likely to be disturbed, The production yield was also poor.

In addition, as an example of the invention that described the needle selection device,
JP-A-61-47856, JP-A-62-28451, JP-A-57-139543, JP-B-62-15664, and JP-A-Sho-6
3-167187 is mentioned.

An object of the present invention is to provide a technique for improving a finger portion in a needle selection device which can keep a constant pushing speed of a jack by a finger, do not cause a center bending, and can cope with an increase in speed.

The above and other objects and novel features of the present invention are as follows.
It will be apparent from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] The outline of a typical one of the inventions disclosed in the present application will be briefly described as follows.

According to the present invention, in the finger of the needle selection device, the angle at which the butt of each of the plurality of fingers contacts the bat (contact surface) according to the protruding length of the bat of a jack having bats having different protrusion lengths. It is configured by changing.

For example, when the protruding length of the butt is gradually increased from the upper side to the lower side, the angle at which the finger contacts the butt of the butt is steeply inclined from the upper side to the lower side.

[Operation] As a result, when the butt protrusion length is short, it is pressed toward the cylinder side by the finger having the gently inclined contact surface, while when the butt protrusion length is longer than this, a steeper angle is applied. By pushing the cylinder side by the fingers having the contacting surfaces, the pushing speed of the jack by these fingers can be made constant.

Therefore, it is possible to avoid collision with the wall surface of the cylinder groove at an extremely high speed, and it is possible to prevent the jack from being broken.

Therefore, the knitting action of the knitted fabric can be smoothly performed.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 3, a plurality of protruding butts 3-1 to 3-10 are provided on one side surface of the thick jack 4 at appropriate intervals in the vertical direction. Here, an example in which ten bats 3-1 to 3-10 are provided is shown.

A plurality of the jacks 4 are arranged on the outer periphery of the cylinder 1 at appropriate intervals, and the bat 3-
Although 1 to 3-10 are patterned according to the knitting pattern of the knitted fabric, the patterning state is not shown in the illustrated example.

The protruding side surface 40 of the butt 3-1 to 3-10 of the jack 4 is not parallel to the protruding side surface of the bat, but is located between the side surface of the cylinder 1 as illustrated. Then, the needle selecting operation is performed such that the distance α is sequentially increased from the top to the bottom.

That is, the jack 4 is pressed (pushed) to the cylinder 1 side by being pressed by the finger 7 with the point F shown as a fulcrum, as shown by the arrow 42, and is selected as described above. Needle operation is performed. At that time, the cylinder 1 is rotating at a constant rotation speed. The jack 4 fitted in the groove 2 of the cylinder 1 also rotates together.
Further, the finger 7 is pressed at a constant speed by electromagnetic drive or piezoelectric drive.

The butt 3-1 to 3-10 has a protruding length β that increases from top to bottom.

In the conventional example, as shown in FIG. 8, the contact angles of the butt contact surfaces 9 of the fingers 7 ... With the butt are the same in the vertical direction. As shown in FIG. 3, the angle is changed corresponding to the butt 3-1 to 3-10 of the jack 4 having different protruding lengths in the vertical direction as shown in FIG.

That is, FIG. 1 schematically shows only the finger 7 portion of the needle selecting device 6 as shown in FIG. 8, and the finger 7 is viewed from above. As shown in FIG. 8, each of the fingers 7 ... Is arranged so as to be vertically stacked with a space therebetween.
A tip portion 70 of the needle selecting device 6 projects to the outside with the same length. Here, with respect to the finger 7, reference numeral 7-
An example in which 5 pieces of 1 to 7-5 are provided is shown.

As shown in the figure, the tip portions 70- of the fingers 7-1 to 7-5 are arranged from top to bottom in correspondence with the protruding length β of the bat.
The angles θ _{1 to} θ ₅ of the butt contact surfaces 9-1 to 9-5 of _{1 to} 70 to ₅ which contact the bat are changed.

That is, the angles θ _{1 to} θ ₅ are the same as the fingers 7-1.
When a line (indicated by a one-dot chain line) is drawn at a right angle to both sides of each of the distal end portions 70-1 to 70-5 of 7 to 7-5, the line and the contact surfaces 9-1 to 9-5 Angle formed by the angle θ ₁
Through? ₅ is are constituted to sequentially steep from top to bottom.

Note that, in FIG. 1, the above line is not drawn at right angles to both side surfaces of the tip portion of the finger for convenience of illustration, but the angle θ ₁
˜θ ₅ is defined as the angle formed with the line drawn at right angles.

In this way, as shown in FIG. 1, the protrusions β of the bats 3-1 to 3-10 of the jack 4 are changed to change the angles θ _{1 to} θ _{5 of} contact with the bat, thereby projecting the protrusions. For the bat 3-1 having a short length β, for example, the tip portion of the finger 7-1 having a gentle angle, for example, the angle θ _1.
The butt contact surface 9-1 of the 70-1 is used to perform the pressing operation, while the butt 3-5 having a long protrusion length β, for example, the butt 3-5, has a steeper angle, for example, a finger having an angle θ _5. The pressing operation is performed by the butt contact surface 9-5 of the tip portion 70-5 of 7-5.

Here, the conventional example and the present invention will be described in comparison based on FIGS. 2 and 3.

As shown in FIG. 2 (B), as in the conventional case, the finger 70-3 has the same finger angle {(matched with the angle θ ₃ in FIG. 2 (A)} in the vertical direction. , When the butt 3-3 having a difference in the protrusion length β and the butts 3-1 come into contact with each other, the butt 3-3 having a long protrusion length is not aligned with the arrow A.
As shown in FIG. 3, the finger 70-3 moves up from the illustrated right corner to the left corner and moves the pushing distance α ₁₀ shown in FIG.

On the other hand, the butt 3-1 (shown by an imaginary line) having a short protruding length is
As indicated by the arrow B, the contact surface of the finger 70-3 is lifted to move the pushing distance α ₁ shown in FIG.

Therefore, if the butt contact surface angles of the fingers are the same, even though the protrusion lengths are short and long,
Since the butt 3-1 contacts only the upper left corner of the finger 70-3, the pushing distance α ₁ is pushed into the cylinder 1 side at a very fast speed.

Then, when the butt 3-1 part is pressed by the finger 70-3, the jack 4 collides with the side surface of the cylinder 1 with a sudden force, and the jack 4 is hit at the butt 3-1 part.
A crack is generated in the inner part, the center part is broken, it takes a long time to replace the jack 4, and the knitting of the knitted fabric is disturbed.
Product yield will be significantly deteriorated.

On the other hand, in the present invention, in order to avoid such a situation, for example, the butt 3-1 or 3-2 having a shorter protruding length than this is used.
In contrast, as shown in FIG. 2 (A), by making the angles θ ₁ and θ ₂ smaller accordingly,
That is, since the angle becomes gentle, pushing is prevented from being suddenly performed by the fingers, and the lower end portion 41 of the jack 4 moves the pushing distance α within the same time as that for the butt 3-3 having a long protruding length. To do so.

In other words, if the intermediate bat 3-2 shown in FIG. 2 (A) is used as a standard, for a bat 3-3 having a longer protruding length than that, an angle θ that is steeper than the angle θ ₂ and ₃ fingers 7-3, also with respect to the short butt 3-1 protruded lengths than, as gentle angle theta ₁ of the fingers 7-1 of angle than the angle theta _2, the intermediate vat 3 -2
And the bats 3-3, 3-1 having a protruding length shorter than that and the butt 3 above and below the jack 4 by aligning the moving time of the lower end portion 41 of the jack 4 at the pushing distance α.
-1 Make sure not to be pushed in suddenly due to the difference in protrusion length. As a result, the pushing operation can be performed at a constant speed without any breakage.

Therefore, according to the present invention, the complicated work of replacing the jack due to the center bending is not required, and the knitting work is smoothly performed, which is particularly advantageous when performing the needle selecting operation at a high speed at which the center bending is likely to occur. .

Although the invention made by the inventor has been specifically described based on the embodiments, the invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the invention. There is no end.

For example, in the above-mentioned embodiment, an example in which the protruding length of the bat of the jack is sequentially increased from the top to the bottom is shown, but the opposite case is also acceptable, and the protruding length is different but randomly. It may be a case where the lengths are different, or a case where a plurality of pieces having different protruding lengths are combined.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to the piezoelectric type and the electromagnetic type, but also to other types of needle selecting devices for operating the fingers.

[Effects of the Invention] The effects obtained by the typical one of the inventions disclosed in the present application will be briefly described as follows.

According to the present invention, the pushing speeds of the jacks by the fingers can be made to coincide with each other in the upper and lower directions, and the knitting work of the knitted fabric can be smoothly performed without the middle folds of the jacks.

[Brief description of drawings]

1 is an explanatory view showing an embodiment of the present invention, FIG. 2 (A) is an explanatory view showing an embodiment of the present invention, FIG. 2 (B) is an explanatory view showing a conventional example, and FIG. 3 is a book. FIG. 4 is a partial sectional side view showing a relationship between a cylinder and a jack showing an embodiment of the present invention, FIG. 4 is a sectional view showing a conventional example, FIGS. It is an external appearance perspective view of the needle selection device which shows a prior art example. 1 ... knitting cylinder 2 ... vertical groove 3 ... butt 4 ... needle selection jack 5 ... knitting needle 6 ... needle selection device 7 ... needle selection lever (finger) 8 ... lifting cam 9 ... butt hit Contact surface θ _{1 to} θ ₅ …… Abutting angle to bat β …… Projection length of bat

Claims (2)

[Scope of utility model registration request] 1. A needle selection jack, in which bats having different protruding lengths are projected in a plurality of vertical grooves on the outer circumference of a knitting cylinder in a knitting machine, can be swung by vertically moving a knitting needle abutting the jack. A plurality of the butt of the jack, the butt of the knitting needle of the knitting needle by selectively abutting the butt abutment surface of the tip of the needle selection lever arranged at a plurality of appropriate intervals In the needle selecting device for knitting machine that performs needle selection, the angle of contact with the butt of each butt contact surface at the tip of each needle selecting lever of the needle selecting device is defined by the protruding length of the butt protruding from the needle selecting jack. A needle selecting device for a knitting machine, which is modified according to the above. 2. A needle selecting device in which needle selecting levers are vertically stacked in multiple stages at appropriate intervals, and the angle at which the needle contact lever of the needle selecting lever contacts the butt is 2. The needle selecting device for a knitting machine according to claim 1, wherein the needle selecting device for a knitting machine is configured to be larger or smaller sequentially from bottom to top or from top to bottom according to the protruding length of the knitting machine.