JP6930719B2 - Bella needle - Google Patents

Description

The present invention relates to a spatula needle provided with a hook and a spatula at the tip, and more particularly to a spatula needle in which a sudden knitting resistance is prevented from occurring.

Currently, bellows needles are widely used in circular knitting machines and flat knitting machines as needles for knitting knitting (see, for example, Patent Document 1).

Published Practical Publication No. 61-168188

When forming a stitch with this type of spatula needle, a movement occurs in which the tip of the spatula needle is pulled out from the loop of the knitting yarn. Specifically, in a knockover state in which the spatula is in contact with the hook, the loop of the knitting yarn is formed so as to come out toward the tip of the needle along the back surface of the spatula. At this time, if the loop of the knitting yarn is small, the loop narrows down the portion covered by the spatula and the hook, and the frictional resistance between the spatula needle and the yarn may increase. Then, a sudden change in frictional resistance causes a load on the thread or the needle, which causes damage to the fabric or the needle.
Therefore, it is an object of the present invention to provide a bellows needle capable of suppressing abrupt fluctuations in frictional resistance.

The present invention has been made to solve the above-mentioned problems, and is characterized by the following.
The invention according to claim 1 is a spatula needle including a needle body having a hook-shaped hook at the tip and a spatula rotatably attached to the needle body and detachable from the hook. In the knockover state in which the spatula is in contact with the hook, the loop of the knitting yarn is formed so as to come out toward the tip side along the back surface of the spatula, and the needle body is the surface facing the spatula. Has a hook shape on the back surface, which is the opposite surface, and the hook shape is such that at least the needle body and the back surface of the spatula intersect when the belly needle in the knockover state is viewed axially from the side surface. The hollow shape is a chamfered shape with the corner portion on the back surface side of the needle body as an inclined surface, and the corner portion on the back surface side of the needle body without the hollow shape is provided. , The inclined surface is not provided .
The invention according to claim 2 includes a needle body having a hook-shaped hook at the tip, and a belly button rotatably attached to the needle body and detachable from the hook. The needle is formed so that the loop of the knitting yarn comes out toward the tip side along the back surface of the spatula in the knockover state in which the spatula is in contact with the hook, and the needle body is attached to the spatula. The back surface, which is the surface opposite to the facing surface, has a hook shape, and the hook shape is such that at least the needle body and the back surface of the spatula are viewed from the side in the axial direction. The back surface of the needle body from the start point on the anti-tip side of the hollow shape to the tip of the hook is provided up to the position where the needle intersects with the tip of the needle body when the spatula needle is viewed from the side surface in the axial direction. It is characterized by being gradually inclined in the tapering direction.

The invention according to claim 3 is characterized in that, in addition to the feature points of the invention according to claim 1 or 2, the hollow shape is a shape in which the back surface of the needle body is curved inward.

The invention according to claim 4 has a knitting yarn loop in which the shortest yarn length stretched around the needle body and the spatula is set in addition to the feature of the invention according to any one of claims 1 to 3. When the length is set, the loop length of the knitting yarn is characterized in that the loop length of the knitting yarn gradually increases and does not decrease until the loop of the knitting yarn moves toward the tip end side along the back surface of the spatula and comes out of the spatula.

The present invention is as described above, and the needle body has a hollow shape on the back surface, which is the surface opposite to the surface facing the spatula. Occasionally, it is provided at least to the position where the needle body and the back surface of the spatula intersect. According to such a configuration, it is possible to prevent the frictional resistance from suddenly fluctuating when the loop of the knitting yarn rides on the spatula. That is, in the conventional configuration, when the knitting yarn loop comes out to the tip side along the back surface of the spatula in the knockover state, the knitting yarn loop suddenly rides on the back surface of the spatula and starts to slide. The loop was widened, causing abrupt fluctuations in frictional resistance. In this respect, according to the present invention, since the hollow shape is provided, the knitting yarn loop is not suddenly expanded even immediately after riding on the spatula, and the knitting yarn loop is gently expanded. As it goes on, the frictional resistance between the spatula needle and the thread is stable, and a clean fabric can be knitted. Further, since the knitting resistance is small, the power consumption of the knitting machine can be suppressed and the damage of the needle can be suppressed.

Further, the invention according to claim 3 is as described above, and the hollow shape is a shape in which the back surface of the needle body is curved inward. According to such a configuration, when the loop of the knitting yarn slides on the back surface of the spatula, the shape of the loop does not change significantly, so that the fluctuation of the frictional resistance can be suppressed.

Further, the invention according to claim 1 is as described above, and the hollow shape is formed by chamfering the corner portion on the back surface side of the needle body. According to such a configuration, it is possible to prevent the loop of the knitting yarn from being suddenly expanded, and it is possible to prevent the yarn from rubbing at the corner of the back surface of the needle body.

Further, the invention according to claim 2 is as described above, and the back surface of the needle body from the hollow shape to the tip is gradually inclined in the tapering direction to the tip when the spatula needle is viewed from the side surface in the axial direction. ing. With such a configuration, the loop of the knitting yarn can be easily pulled out from the tip of the spatula needle.

The invention according to claim 4 is as described above, and the loop length of the knitting yarn gradually increases until the knitting yarn loop moves toward the tip side along the back surface of the spatula and comes out of the spatula. Does not decrease. According to such a configuration, the loop length does not increase or decrease until the loop comes out from the tip of the spatula needle, so that the loop length can be gradually increased, and the sudden fluctuation of the frictional resistance is suppressed and the knitting yarn is smoothly knitted. The loop can be pulled out from the tip of the spatula needle.

It is a figure which shows the knockover state of the bellows needle which concerns on 1st Embodiment, (a) the graph which shows the increase / decrease of the loop length, (b) the partially enlarged side view of the tip part, (c) with respect to the axial direction. It is an end view when cut in a vertical plane. It is a figure which shows the clear state of the bellows needle which concerns on 1st Embodiment, (a) the graph which shows the increase / decrease of the loop length, (b) the partially enlarged side view of the tip part, (c) with respect to the axial direction. It is an end view when cut by a vertical plane. It is a table which shows the loop length of the bellows needle which concerns on 1st Embodiment. It is a figure which shows the knockover state of the bellows needle which concerns on 2nd Embodiment, (a) the graph which shows the increase / decrease of the loop length, (b) the partially enlarged side view of the tip part, (c) with respect to the axial direction. It is an end view when cut in a vertical plane. It is a figure which shows the clear state of the bellows needle which concerns on 2nd Embodiment, (a) the graph which shows the increase / decrease of the loop length, (b) the partially enlarged side view of the tip part, (c) with respect to the axial direction. It is an end view when cut by a vertical plane. It is a table which shows the loop length of the bellows needle which concerns on 2nd Embodiment. It is a figure which shows the knockover state of the conventional Bella needle, (a) the graph which shows the increase / decrease of the loop length, (b) the partially enlarged side view of the tip part, (c) the plane perpendicular to the axial direction. It is an end view at the time of cutting. It is a figure which shows the clear state of the conventional Bella needle, (a) the graph which shows the increase / decrease of a loop length, (b) the partially enlarged side view of the tip part, (c) cut in the plane perpendicular to the axial direction. It is an end view at the time of. It is a table which shows the loop length of the conventional Bella needle.

An embodiment of the present invention will be described with reference to the drawings.
The bellows needle 10 according to the present embodiment is used by being attached to a circular knitting machine or a flat knitting machine as a needle for knitting, and as shown in FIG. 1 and the like, a hook-shaped hook 14 is attached to the tip. A provided needle body 11 and a spatula 20 rotatably attached to the needle body 11 and detachable from the hook 14 are provided. The spatula needle 10 knits the dough through the process of feeding yarn and forming a loop by opening and closing the spatula 20.

Specifically, the belly needle 10 is moved forward and backward in the axial direction A by the knitting machine, and in conjunction with this forward and backward movement, the belly 20 hooks 14 as shown in FIG. 1 (b). The dough is knitted by alternately repeating a knockover state in contact with the hook 14 and a clear state in which the spatula 20 is separated from the hook 14 and the hook 14 is opened as shown in FIG. 2 (b).

For example, by moving the bellows needle 10 in the axial direction A by the knitting machine, the hook 14 in the clear state is made to enter the loop of the knitting yarn S, and the hook 14 of the bellows needle 10 is grasped by the hook 14 of the bellows needle 10 on the other side of the loop. After that, by moving the spatula needle 10 in the retracting direction, when the hook 14 comes out of the loop, the spatula 20 is closed by the loop to be in a knockover state, and the loop of the knitting yarn S is along the back surface 20a of the spatula 20. Pull out to the tip side. By this series of operations, the thread can be passed through the loop to form a stitch. When the spatula needle 10 is moved again in the approaching direction, the spatula 20 is opened by the tension of the thread held by the hook 14 and is in a clear state. The clear needle 10 releases the thread it has grasped and enters the next loop.

The needle body 11 according to the present embodiment is provided between the rod-shaped needle trunk 13, the cheek portion 15 provided on the tip end side of the needle stem 13 and supporting the spatula 20, and the cheek portion 15 and the hook 14. A connection portion 16 is provided. The cheek portion 15 is provided with a rotating shaft 25 that rotatably supports the spatula 20. The rotating shaft 25 is formed by, for example, a pin or caulking. Further, as shown in FIG. 1B and the like, the connecting portion 16 is formed so as to be tapered in a side view. A hook 14 bent into a J shape is provided at the tip of the connecting portion 16. As shown in FIG. 1 (c) and the like, the hook 14 has a tip 14a thinner than the connecting portion 16 and the needle trunk 13, so that the hook 14 can enter the groove portion 20b (described later) of the spatula 20. There is.

In this embodiment, the hook 14 is on the tip side of P1 shown in FIG. 1 (c) and the like, the connecting portion 16 is between P1 and P3, and the cheek portion 15 is between P3 and P7. Yes, the needle trunk 13 is on the rear end side of P7.

Further, in the present embodiment, the rear end portion of the spatula 20 is sandwiched between the cheek portions 15 of the needle body 11 from both sides and is rotatably held. Further, a groove portion 20b having a substantially V-shaped cross section is provided at the tip portion of the spatula 20, and by receiving the tip end 14a of the hook 14 at the groove portion 20b, the spatula 20 takes a knockover state in contact with the hook 14. It is configured as follows.

The back surface 20a of the spatula 20 (the surface opposite to the surface facing the needle body 11) is mainly composed of two inclined surfaces. That is, the rear end inclined portion 20e formed on the rotation shaft 25 side and the tip inclined portion 20d formed on the tip side of the rear end inclined portion 20e. The rear end inclined portion 20e forms a steeper slope than the tip inclined portion 20d in the knockover state. Further, between the rear end inclined portion 20e and the tip inclined portion 20d, a gentle mountain portion 20c formed by a curved surface (for example, an R shape) is provided. Therefore, the back surface 20a of the spatula 20 is formed so that the inclination angle changes on both sides of the mountain portion 20c. When the loop of the knitting yarn S is pulled out to the tip side along the back surface 20a of the spatula 20 in the knockover state, the loop first slides along the rear end inclined portion 20e, then passes through the mountain portion 20c, and then the tip inclined portion 20d. It slides along to the tip of the wrasse 20.

By the way, the needle body 11 described above has a hollow shape 11b on the back surface 11a, which is a surface opposite to the surface facing the spatula 20. This gouged shape 11b is a position X where at least the needle body 11 and the back surface 20a of the spatula 20 intersect when the knockover needle 10 is viewed from the side surface in the axial direction A (see FIG. 1B). It is provided up to the P5 line). More specifically, this hollowed shape 11b has a range (from P4 to P5) of at least the mountain portion 20c of the belly 20 to the intersection position X when the knockover needle 10 is viewed from the side surface in the axial direction A. Range) is provided to include.

In the present embodiment, as shown in FIG. 1 and the like, the hollow shape 11b has a shape in which the back surface 11a of the needle body 11 is curved inward. By providing this gouged shape 11b, the back surface 11a of the needle body 11 has a slightly steeper angle toward the tip side at a position corresponding to the rear end inclined portion 20e of the spatula 20 (range from P4 to P5). It is formed so as to approach the 20 side, and at the position corresponding to the tip inclined portion 20d of the vera 20 (range from P1 to P4), the position corresponding to the rear end inclined portion 20e of the vera 20 (from P4). It is formed so as to approach the Bella 20 side with a slope that is gentler than the range up to P5).

By the way, in the conventional structure as shown in FIGS. 7 to 9, when the loop of the knitting yarn S passes through the spatula 20 in the knockover state, a sudden frictional resistance is generated between the spatula needle 10 and the knitting yarn S. There was a case.

FIG. 7A shows a loop length of the knitting yarn S when the shortest yarn length stretched around the needle main body 11 and the spatula 20 is defined as the loop length of the knitting yarn S on a plane perpendicular to the axial direction A of the needle main body 11. (See FIG. 7C and the like), it is a graph which shows the increase / decrease of the loop length. Further, FIG. 9 is a table showing the loop lengths in P1 to P10. As shown in these figures, since the hollow shape 11b does not exist in the conventional structure, the loop length sharply increases in the range from P5 to P3. As described above, the sudden increase in the loop length may cause a sudden frictional resistance between the spatula needle 10 and the knitting yarn S. Further, after the loop length rapidly increases in the range of P5 to P3, the loop length reaches the first peak in P3, then the loop length decreases in the range of P5 to P3, and then again from P3 to P1. The loop length increases again in the range up to. Since the loop length increases or decreases in this way, there is a problem that the frictional resistance is not stable.

In this regard, according to the present embodiment, as shown in FIGS. 1A and 3, the loop length gradually increases in the range from P5 to P1. In other words, the loop length according to the present embodiment is configured so as not to gradually increase and decrease until the loop of the knitting yarn S moves toward the tip side along the back surface 20a of the spatula 20 and comes out of the spatula 20. .. According to such a configuration, the loop length can be gradually increased, the sudden fluctuation of the frictional resistance can be suppressed, and the loop of the knitting yarn S can be smoothly pulled out from the tip of the spatula needle 10. Further, since the loop length does not increase or decrease until the loop comes out from the tip of the bellows needle 10, the frictional resistance can be stabilized.

Since the back surface 11a of the needle body 11 according to the present embodiment is gradually inclined to the tip in the tapering direction, the loop of the knitting yarn S does not get caught on the back surface 11a of the needle body 11 after being disengaged from the spatula 20. , It can be configured so that it can be smoothly pulled out from the tip of the bellows needle 10.

In the above-described embodiment, the hollow shape 11b has a shape in which the back surface 11a of the needle body 11 is curved inward, but the shape is not limited to this. That is, instead of the curved shape, or in addition to the curved shape, the chamfered shape formed on the back surface 11a of the needle body 11 may be the hollow shape 11b. Specifically, as shown in FIGS. 4 to 6, the hollow shape 11b may be formed by chamfering the corner portion on the back surface 11a side of the needle body 11.

As described above, according to the present embodiment, the needle body 11 has a hollow shape 11b on the back surface 11a, which is a surface opposite to the surface facing the spatula 20, and the hollow shape 11b is a knockover-state bell. When the needle 10 is viewed from the side surface in the axial direction A, it is provided at least to a position where the needle body 11 and the back surface 20a of the spatula 20 intersect. According to such a configuration, it is possible to prevent the frictional resistance from suddenly fluctuating when the loop of the knitting yarn S rides on the spatula 20. That is, in the conventional configuration, when the loop of the knitting yarn S comes out to the tip side along the back surface 20a of the spatula 20 in the knockover state, the loop of the knitting yarn S rides on the back surface 20a of the spatula 20 and starts to slide. The loop of the knitting yarn S was suddenly widened, and the frictional resistance suddenly fluctuated. In this regard, according to the present embodiment, since the gouged shape 11b is provided, the loop of the knitting yarn S is not suddenly expanded even immediately after riding on the spatula 20, and the knitting yarn S is gently knitted. As the loop of the above is expanded, the frictional resistance between the spatula needle 10 and the knitting yarn S is stable, and a clean fabric can be knitted. Further, since the knitting resistance is small, the power consumption of the knitting machine can be suppressed, and the damage of the bellows needle 10 can be suppressed.

10 Bella needle 11 Needle body 11a Back 11b Scoop shape 13 Needle trunk 14 Hook 14a Tip 15 Cheek part 16 Connection part 20 Bella 20a Back 20b Groove 20c Mountain part 20d Tip tilt part 20e Rear end tilt part 25 Rotating shaft S Intersection position A axis direction

Claims (4)

A needle body with a hook-shaped hook at the tip,
A spatula that is rotatably attached to the needle body and can be detached from the hook,
It is a wrasse needle equipped with
In the knockover state in which the spatula is in contact with the hook, the loop of the knitting yarn is formed so as to come out toward the tip side along the back surface of the spatula.
The needle body has a hollow shape on the back surface, which is a surface opposite to the surface facing the spatula.
The gouged shape is provided at least to a position where the needle body and the back surface of the spatula intersect when the spatula needle in the knockover state is viewed from the side surface in the axial direction.
The gouged shape is a chamfered shape in which the corner portion on the back surface side of the needle body is an inclined surface, and the corner portion on the back surface side of the needle body without the gouge shape is not provided with the inclined surface. Bella needle featuring. A needle body with a hook-shaped hook at the tip,
A spatula that is rotatably attached to the needle body and can be detached from the hook,
It is a wrasse needle equipped with
In the knockover state in which the spatula is in contact with the hook, the loop of the knitting yarn is formed so as to come out toward the tip side along the back surface of the spatula.
The needle body has a hollow shape on the back surface, which is a surface opposite to the surface facing the spatula.
The gouged shape is provided at least to a position where the needle body and the back surface of the spatula intersect when the spatula needle in the knockover state is viewed from the side surface in the axial direction.
The back surface of the needle body from the start point on the opposite end side of the hollow shape to the tip of the hook is gradually inclined in the tapering direction to the tip when the spatula needle is viewed from the side surface in the axial direction. Bella needle as a feature. The bellows needle according to claim 1 or 2, wherein the hollow shape is a shape in which the back surface of the needle body is curved inward. When the shortest yarn length that can be stretched around the needle body and the spatula is the loop length of the knitting yarn,
3. Bella needle according to any one item.

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