JPH0813303A - Lower hook driving device for net knitting machine - Google Patents

Abstract

PURPOSE:To provide a lower hook driving device capable of making high-speed operation of a net knitting machine with a simple constitution. CONSTITUTION:A lower hook back-and-forth mechanism 10 is so designed as to be equipped with a lower hook back-and-forth cam 11 to be driven by the main shaft 3 and a lower hook back-and-forth lever 17 with the lower end pivoted on a lower hook shaft 20 and the upper end pivoted on a lower hook plate 40 and designed to enable a lower hook 41 to make reciprocating motion along an arc locus in compliance with the cam 11 between the front and rear of a shuttle 44. A lower hook dropping mechanism 30 is so designed as to be equipped with a lower hook dropping cam 31 to be driven by the main shaft 3, a lower hook dropping lever 37 pivoted on a lower hook shaft 20 and revolvable in compliance with the cam 31, and a lower hook dropping rod 38 with the lower end pivoted on the lower hook dropping lever 37 and the upper end pivoted on the front end of the lower hook plate 40 so as to descend the lower hook 41 as the lower hook dropping lever 37 is revolved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower hook driving device for driving a lower hook of a knitting machine.

[0002]

2. Description of the Related Art A lower hook of a knitting machine is constructed so that the lower hook of an upper hook, which is forming a knot, is pierced, a warp thread is drawn from the lower hook, and a knot is passed through a shuttle. As a device for driving such a lower hook, there is conventionally used a single rail type device provided with a pair of rails that movably support both sides of a lower hook plate on which a plurality of lower hooks are arranged side by side via rollers. A two-rail type device having two rails on each side is generally used.

[0003]

Due to the structure of the one-rail type lower hook driving device, when pulling out the drawn warp from the lower side of the thread removing member on the rear lower side of the shuttle, the lower hook is removed. The tip cannot be inclined downward, which makes it difficult for the warp thread to come off from the lower hook, and when the warp thread comes out unevenly due to uneven timing or when the warp thread comes off the lower hook, There is a problem that tension is applied and the lower hook vibrates greatly.

A two-rail type lower hook drive device is, for example,
As shown in FIGS. 6 and 7, the fixed rail 51 and the movable rail 5
2 are adjacent to each other and are pivotally attached to the main body frame 50 by a shaft 53, and a rod 54 of a lower hooking mechanism is connected to a tip end portion of the movable rail 52. Also, a large number of lower hooks 55
Rollers 57 pivotally attached to the end of a lower hook plate 56 in which
A fixed rail 51 and a movable rail 52 are provided so that they can roll. Further, a lower hook front-rear mechanism is formed by a lever 60 that pivotally moves by a cam (not shown) with the fixed shaft 59 as a fulcrum, and a drive link 61 in the front-rear direction.
The roller 57 is connected to the shaft of the roller 57.

In this device, as shown in FIG. 7, first, when the fixed rail 51 and the movable rail 52 are horizontal, the lower hook plate 56 is moved forward by the rotation of the lever 60 (leftward in the figure).
Pull out the warp from the lower part of the upper hook, which is being knotted, and return to the rear end position (shown by the solid line in the figure). Next, the movable rail 52
However, the lower hook plate 56 is rotated slightly downward about the shaft 53 as a fulcrum.
Moves forward to a predetermined position (indicated by a chain double-dashed line in the figure). As a result, the lower hook 55 is slid downward into the thread removing member 64 located below the rear end of the shuttle 63.
The warp thread comes off the lower hook 55 and passes through the shuttle 63.

However, this two-rail type lower hook driving device removes the pulled out warp thread from the lower hook when the rear end of the shuttle is arranged in a lowered posture due to the enlargement of the shuttle. Since the position is considerably downward, the lower hook needs to be largely dropped, and the rotation range of the movable rail must be increased. Therefore, there is a problem that the load of the lower hooking mechanism that moves the movable rail is increased, the rotation of the knitting machine, that is, the knitting speed cannot be increased, and the abrasion of the sliding portion of the device also increases. there were.

The present invention has been made in view of the above points, and an object thereof is to drive a lower hook of a knitting machine which enables high-speed operation of the knitting machine and which can be simply constructed. It is intended to provide a device.

[0008]

The present invention has been made in order to achieve the above object, and a lower hook drive device of a knitting machine of the present invention comprises a plurality of lower hooks arranged side by side on a lower hook plate. Lower hook of a knitting machine equipped with a lower hook forward / backward mechanism capable of reciprocating between the front side and the rear side of the shuttle, and a lower hook dropping mechanism capable of lowering the lower hook to the rear lower side of the shuttle. The lower hook front-rear mechanism is a driving device, and a lower hook front-rear cam driven by a main shaft, a lower end pivotally supported by the lower hook shaft, and an upper end pivotally attached to the lower hook plate and the lower hook. A lower hook front and rear lever that is provided so as to reciprocate along the front and rear cams by drawing an arcuate path between the front side and the rear side of the shuttle, and the lower hook dropping mechanism, A lower hook cam driven by the main shaft and pivotally supported by the lower hook shaft and driven by the lower hook cam to rotate. Functioning lower hook lever, the lower end of which is pivotally attached to the lower hook lever and the upper end of which is pivotally attached to the front end of the lower hook plate so that the lower hook is rotated as the lower hook lever rotates. A lower hook driving device for a knitting machine, comprising: a lower hook dropping rod provided so as to be able to descend.

[0009]

The present invention is constructed as described above,
In the lower hook front-rear mechanism, the lower hook front-rear lever rotates in one direction in accordance with the rotation of the lower hook front-rear cam, and moves the lower hook of the lower hook plate to the front side of the shuttle where the knot is being made. At this time, the lower hook mechanism rotates the lower hook lever as the lower hook cam rotates, and supports the lower hook plate that has moved to the front side of the shuttle in a substantially horizontal state via the lower hook rod. are doing. Then, the warp thread is hung on the lower hook so that the thread can be pulled out.

Next, the lower hook front and rear levers rotate in the other direction, and the lower hook plate moves in an arcuate path toward the rear side of the shuttle, pulls out the warp thread, and reaches the rearmost position. Then, while the lower hook front and rear levers rotate slightly in one direction,
The lower hook lever is rotated to lower the front end of the lower hook plate via the lower hook rod. As a result, the warp thread is removed from the lower hook on the lower rear side of the shuttle, and the warp thread passes through the shuttle and becomes a knot state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lower hook driving device of a knitting machine of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a lower hook driving device in a knitting machine, and FIG. 2 is an exploded perspective view of essential parts. In FIG. 1, main body frames 1 and 1 are erected opposite to each other on the front side and the back side of the knitting machine, and the lower hook drive devices of the same configuration are symmetrically arranged on both outer sides thereof, Between the body frames 1 and 1,
A main shaft 3 is rotatably supported by a power unit. In addition, below, the left side of the apparatus shown in FIG. 1 is made into the front side, and the right side is made into the back side.

The lower hook driving device of the knitting machine of the present invention comprises a lower hook front-rear mechanism 10 and a lower hook lowering mechanism 30. The lower hook front-rear mechanism 10 includes a lower hook front-rear cam 11, a front-rear driven lever 13, and a lower hook front-rear lever 13. ,
The lower hook front-rear lever 17 pivotally supported on the lower hook shaft 20 includes a lower hook drop mechanism 30, a lower hook drop cam 31, a drop follower lever 33, and a lower hook drop pivotally supported by the lower hook shaft 20. It is composed of a lever 37 and a lower hook dropping rod 38, and the upper end of the lower hook front and rear lever 17 and the upper end of the lower hook dropping rod 38 are
Each of the lower hook support members 25 attached to the lower hook plate 40 is pivotally mounted. In addition, a large number of lower hooks 41 are juxtaposed on the lower hook plate 40 at predetermined intervals.

The lower hook front-rear cam 11 of the lower hook front-rear mechanism 10
In the embodiment, the main shaft 3 comprises a positive cam having a cam groove.
It is formed so as to be driven by. The front-rear driven lever 13 has a long hole 14 extending in the longitudinal direction of the lever 13 at the base end, and a cam ball 15 that engages with the groove of the lower hook front-rear cam 11 is fixed at the center. In the front-rear driven lever 13, the elongated hole 14 is externally fitted to the main shaft 3, and
The tip is pivotally attached to the lower hook front-rear lever 17.

The lower hook front / rear lever 17 has a lower end portion which is installed between the main body frames 1 and 1 in parallel with the main shaft 3 at the lower end thereof.
Is pivotally supported by the support shaft hole 26 of the lower hook support shaft 25.
It is pivotally attached via a support shaft 19. This allows
As the lower hook front / rear cam 11 rotates, the lower hook front / rear lever 17
Is configured to reciprocate forward and backward in an arcuate locus with the lower hook shaft 20 as a fulcrum. Lower hook support 25
Has a support shaft hole 26 at the rear end and a front end hole 2 at the front end.
7 and is fixed to the end portion of the lower hook plate 40. The lower hook support 25 may be formed integrally with the lower hook plate 40.

The lower hooking cam 31 of the lower hooking mechanism 30 is
It consists of a positive-moving cam having a cam groove, and is formed so as to be driven by the main shaft 3 in synchronization with the lower hook front-rear cam 11. The drop follower lever 33 has a long hole 34 extending in the longitudinal direction of the lever 33 at the base end portion, and a cam ball 35 that engages with the cam groove of the lower hooking cam 31 is fixed to the center portion. The drop driven lever 33 has a long hole 34 fitted onto the main shaft 3 and a tip end pivotally attached to a lower hook lever 37.

The lower hook drop lever 37 includes two arm portions 37.
a and 37b, and the base is pivotally supported on the lower hook shaft 20. The arm portion 37a is pivotally attached to the tip of the drop driven lever 33, and the arm portion 37b is attached to the lower hook rod 3.
It is pivotally attached to the lower end of 8. The upper end of the lower hook rod 38 is pivotally attached to the front end hole 27 of the lower hook support 25 via the front support shaft 39. As a result, the lower hook cam 3
With the rotation of 1, the lower hook dropping lever 37 rotates about the lower hook shaft 20 as a fulcrum, and the distance between the lower hook shaft 20 and the front support shaft 39, that is, the dropping distance D of the lower hook 41 is variable. Is configured to.

1 and 2, the lower hook driving device on the outside of the main body frame 1 on the front side has been described. However, the lower hook driving device of the same structure provided on the outside of the main body frame 1 on the back side is used together. It is configured to operate synchronously. As a result, the lower hook 41 moves forward along the arcuate locus between the front side and the rear side of the shuttle 5, and
The lower hook 41 is moved rearward and downward of the shuttle 5.

On the receiving frame 45 between the body frames 1 and 1, a large number of shuttles 44 containing wefts are placed, and the receiving frame 4 supporting the rear portion of the shuttle 44.
5, a thread removing member 46 is provided, an upper hook 47 is provided at an upper front portion of the shuttle 44, and a comb 48 and a thread swing 49 are provided below the upper hook 47.

Next, the operation of the lower hook driving device of the knitting machine thus constructed will be described.

A net knot is formed using the warp yarn and the weft yarn in the shuttle 44 by rotating the upper hook 47 above the comb 48. In the middle of the knot, the lower hook 41 is operated to pull out the warp yarn, and the shuttle is pulled out. The shuttle 44 is passed through by removing the warp threads at the lower rear of 44. During the process of making this nodule, the lower hook 41 that had been located in the middle portion of the arcuate locus above the shuttle 44 (for example, the portion shown in FIG. 1) up to that point.
Moves forward to a position where a knot is being formed (thread hooking position) with tilting forward with the lower hook shaft 20 of the lower hook front and rear lever 17 as a fulcrum (see FIG. 3).

That is, in the lower hook front and rear mechanism 10, the front and rear driven levers 13 are driven by the rotation of the lower hook front and rear cams 11, and the elongated holes 14 and the main shaft 3 are engaged to slide forward. As a result, the lower hook front-rear lever 17 tilts to the frontmost position, and moves the lower hook plate 40 to the frontmost position via the lower hook support 25.
At this time, in the lower hook dropping mechanism 30, the lower driven lever 33 is driven by the rotation of the lower hook dropping cam 31, and the elongated hole 34 is formed.
And the main shaft 3 are engaged with each other to slide forward.

The arm portion 37a of the lower hooking lever 37
Tilts slightly forward, and through the lower hook dropping rod 38 pivotally attached to the arm portion 37b, the dropping distance D is maximized, and the lower hook plate 4
Hold 0 almost horizontally. As a result, the lower hook 41 moves to the thread hooking position, and the warp thread is hooked on the lower hook 41 by the operation of the thread swing 49, and the thread can be pulled out.

Then, by the operation of the lower hook front-rear mechanism 10 in accordance with the rotation of the main shaft 3, the lower hook front-rear lever 17 goes through the intermediate position (shown in FIG. 1) to move the lower hook 41 to the rearmost pulled-out position. (See FIG. 4).

That is, the front and rear driven lever 13 is driven by the rotation of the lower hook front and rear cam 11, and slides rearward by the engagement between the elongated hole 14 and the main shaft 3. As a result, the lower hook front / rear lever 17 tilts rearmost, and moves the lower hook plate 40 rearward via the lower hook support 25. At this time, in the lower hook dropping mechanism 30, the lower driven lever 33 is driven by the rotation of the lower hook dropping cam 31, and the elongated hole 34 and the main shaft 3 are engaged with each other.
Slide slightly backward from the position.

The arm portion 37a of the lower hooking lever 37
Tilts rearward a little, the drop distance D is shortened to a predetermined value via the lower hook dropping rod 38, and the front end portion of the lower hook plate 40 is held at a position higher than the rear end portion. As a result, the lower hook 41 draws an arcuate locus and moves to the rear of the shuttle 44 while the warp thread is hung, and pulls out the warp thread from the knot point.

Subsequently, with the rotation of the main shaft 3, the lower hooking lever 37 of the lower hooking mechanism 30 tilts most forward, and the lower hooking front and rear lever 17 of the lower hook front-back mechanism 10 tilts slightly forward. The lower hook 41 is moved to the thread removing position (see FIG. 5).

That is, when the lower hook drop cam 31 is rotated, the drop follower lever 33 is driven to move the lower hook drop lever 37.
Tilt the most forward. As a result, the drop distance D of the lower hook support tool 25 is minimized via the lower hook dropping rod 38, and the front end portion of the lower hook plate 40 is lowered to bring it to the front lowering state. Further, by the rotation of the lower hook front / rear cam 11, the front / rear driven lever 13 is driven to slide a little forward, and the lower hook front / rear lever 17 is tilted slightly forward, so that the lower hook 41 in the front lowering state is moved. , Advance to the lower part of the shuttle 44. At that time, the warp thread hung on the lower hook 41 is pulled by the thread removing member 4
6 is removed from the lower hook 41, passed under the shuttle 44, and pulled back to the knot point.

Thereafter, as the main shaft 3 rotates, the lower hook front-rear lever 17 tilts slightly rearward and the lower hook drop lever 37 tilts slightly rearward, so that the lower hook 41 moves to the thread drawing position shown in FIG. return. The subsequent rotation of the main shaft 3 causes the lower hook front / rear lever 17 to tilt forward, and the lower hook drop lever 37 tilts slightly rearward, through the intermediate position shown in FIG.
1 advances to the yarn hooking position, which is the next knot point, and repeats the same operation as above.

The present invention is not limited to the above description and the examples of the drawings, and its embodiment can be modified without departing from the technical idea of the present invention.

[0031]

As described above, according to the lower hook driving device of the knitting machine of the present invention, the reciprocating movement of the lower hook between the front side and the rear side of the shuttle is an arc with the lower hook shaft as a fulcrum. Since it is configured to move, reciprocating movement is extremely smooth, vibration and noise can be reduced, and high-speed operation can be performed.

Further, since the device is composed of two axes of the main shaft and the lower hook shaft, and the lower hook plate is supported by the lever, the device can be constructed more simply than the conventional two-rail type device. In addition, the reciprocating range of the lower hook can be freely set, and the assembly and adjustment work of the device can be easily performed.

[Brief description of drawings]

FIG. 1 is a front view of a lower hook driving device of a knitting machine according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same main part.

FIG. 3 is a front view showing a thread hooking position state of a lower hook.

FIG. 4 is a front view showing the thread pulling position of the lower hook.

FIG. 5 is a front view showing the thread removing position of the lower hook.

FIG. 6 is a perspective view showing a conventional lower hook driving device.

FIG. 7 is an explanatory view showing the movements of the rail and the lower hook.

[Explanation of symbols]

 1 Main spindle 10 Lower hook front-rear mechanism 11 Lower hook front-rear cam 17 Lower hook front-rear lever 20 Lower hook shaft 30 Lower hook drop mechanism 31 Lower hook cam 37 Lower hook lever 38 Lower hook rod 40 Lower hook plate 41 Lower hook

Claims (1)

[Claims] 1. A lower hook front-rear mechanism capable of reciprocating a plurality of lower hooks juxtaposed on a lower hook plate between a front side and a rear side of a shuttle, and lowering the lower hook to a rear lower side of the shuttle. A lower hook drive device of a knitting machine equipped with a possible lower hook drop mechanism, wherein the lower hook front-rear mechanism is a lower hook front-rear cam driven by a main shaft, and a lower end portion thereof is pivotally supported on the lower hook shaft. The upper end of the lower hook is pivotally attached to the lower hook plate, and the lower hook is provided so as to reciprocate in an arcuate path between the front side and the rear side of the shuttle by following the lower hook front-rear cam. And a lower hook front and rear lever, wherein the lower hook dropping mechanism is pivotally supported by the lower hook shaft and pivotally driven by the lower hook dropping cam. A lower hook dropping lever, a lower end of which is pivotally attached to the lower hook lever and an upper end of which is pivotally attached to a front end of the lower hook plate. Lower hook driving device of net weaving machine for the serial under 鉤落 and rods under 鉤落 provided to be lowered the lower hook with the rotation of the lever, characterized in that it comprises a.