JPH0153379B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a lower hook driving device for driving a lower hook in a knitting machine.

<Prior art> The lower hook of a knitting machine is inserted into the lower part of the upper hook where a knot is forming, and operates to pull out the warp yarn from there and pass it through the shuttle. Conventionally, the device is a single rail type device, which has a pair of rails that movably support both sides of the lower hook plate to which the lower hook is attached via rollers, and a device that has two rails on each side. There is a two-rail type device.

<Problems to be solved by the invention> Due to its structure, the single rail type lower hook drive device has
When removing the drawn warp threads by inserting the lower hook under the thread removal section, the tip of the lower hook cannot slope downward, making it difficult to remove the warp threads from the lower hook. There were problems in that the mesh became irregular due to variations, and when the warp threads came off the lower hook, a large amount of tension was applied to the warp threads, causing the lower hook to vibrate greatly.

As shown in FIG. 5, the two-rail type lower hook drive device includes a main body frame 35 with a fixed rail 36 and a movable rail 37 adjacent to each other and pivotally supported by a shaft 38.
A rod 39 for removing the lower hook is connected to the lower end of the movable rail 37, and two rollers 4 are pivotally supported in front and behind the end of a lower hook plate 41 on which a number of lower hooks 40 are arranged in parallel.
2 and 43 are rotatably supported within a fixed rail 36 and a movable rail 37, respectively, and a lever 45 that rotates about a fixed shaft 44 by a cam (not shown) is connected to a link 46 for horizontal driving. It is connected to the roller shaft of the lower hook plate 41 via a shaft 47. As shown in FIG. 6, first, when the fixed rail 36 and the movable rail 37 are horizontal, the lower hook plate 41 moves forward by rotating the lever 45, and the warp threads are threaded from the bottom of the upper hook which is being knotted. is pulled out and returned to the rear end position, and then the lower hook plate 41 moves forward to a predetermined position while the movable rail 37 rotates slightly downward about the shaft 38, so that the lower hook 40 moves to the rear end position of the shuttle 48. The warp threads are pushed obliquely downward into the thread release section 49 located on the lower side, whereby the warp threads are removed from the lower hook 40 and released from the shuttle 4.
Pass through 8.

However, this two-rail type lower hook drive device cannot be used when the shuttle is placed in a position where the rear end is lowered due to an increase in the size of the shuttle.
Since the position at which the drawn warp threads are removed from the lower hook is considerably lower, the lower hook must be dropped significantly, and the range of rotation of the movable rail must be increased. Therefore, the load on the drive system that moves the movable rail increases, making it impossible to increase the rotation of the knitting machine, that is, the speed of the knitting machine, and causing increased wear on the sliding parts of the machine.

<Means for Solving the Problems> The present invention has been made in view of the above-mentioned points, and the drawn warp threads can be smoothly and easily removed at the same timing, and the rotation of the rail for moving the lower hook is improved. The purpose of the present invention is to provide a lower hook drive device which has a small dynamic range and enables high-speed operation of a knitting machine without increasing the load, and is constructed as follows.

That is, in the lower hook drive device of the present invention, two rollers are pivoted at the ends of the lower hook plate on which a large number of lower hooks are arranged side by side, and a rail is attached to a part of the main body frame and rotates at its base. The lower hook of the knitting machine is pivotably supported, and a vertical movement lever for rotating the rail up and down is connected to the rail via a link member, and a roller rolls within the rail to move the lower hook. In the drive device, the inner part of the rail from approximately the middle to the tip is separated as a sub-rail, the sub-rail is pivotally supported at the tip of the rail so that it can rotate downward, and the upper part of the sub-rail is connected to the main body frame via a connecting rod. When the sub-rail is connected to the sub-rail and the rail is rotated downward, the front part of the sub-rail is rotated downward around the tip of the rail.

Therefore, if the rail is rotated downward with the warp threads pulled out from the point where knotting is performed using the lower hook, the sub-rail that supports the roller on the front side of the end of the lower hook plate will move the tip of the rail. Since the rail rotates downward on the fulcrum, if the lower hook plate is moved forward in that state, the lower hook attached to the lower hook plate will point downwards enough even though the rotation angle of the rail is small. The warp yarns hung there can be easily and smoothly removed.

<Example> An example of the present invention will be described below based on the drawings.

FIG. 1 shows a front view of a lower hook drive device in a knitting machine, FIG. 2 shows a right side view of the same, and FIG. 3 shows a plan view of the same. In FIG. 1, the main part of the drive device is installed on the front side (outside) of the main body frame 1 that is standing upright, and the lower hook plate 3 has a number of lower hooks 2 arranged side by side on the back side (inside) of the main body frame 1. is placed horizontally. Two rollers 4 and 5 are installed at both ends of the lower hook plate 3.
The rollers 4 and 5 are pivoted with their positions shifted toward the front inside and the rear outside as shown in FIG.
is engaged with a long hole provided in the rail 6 and moves along the rail 6. This rail 6 has its base pivoted on the main body frame 1 and is supported so as to be rotatable in the vertical direction, and the intermediate portion of the rail 6 is connected to a vertically movable lever 8 below via a link member 7. The vertically moving lever 8 is rotatably supported on the lower part of the main body frame 1, and is driven by a rotating mechanism (not shown) in the range shown by the imaginary line, and is moved up and down the rail 6. As shown in the plan view of FIG. 3, the rail 6 is formed by overlapping two rails, an inner one and an outer one, and the roller 4 rolls on the inner part and the roller 5 rolls on the outer part. Moreover, the inner rail part from the middle part to the tip part is independent as a sub-rail 9, and the sub-rail 9 has a pin 10 inserted into the tip of the rail 6.
It is rotatably supported on the rail 6 by. The upper part of the sub-rail 9 protrudes upward, and a connecting rod 11 is connected between its tip and the main body frame 1. Therefore, when the vertical movement lever 8 rotates downward from the state shown in FIG. It pivots away from the rail 6 and rotates downward. At the rising end position of the rail 6 (solid line position in Figure 1), the diagonally cut left end of the sub-rail 9 accurately contacts the end of the inner side of the rail 6, and the rollers 4 touch the inner side of the rail 6. , the rail 6 and the sub-rail 9 are arranged so that the roller 5 smoothly rolls on the outer portion thereof.

Reference numeral 12 denotes a back-and-forth moving lever that is pivotally supported on the main body frame 1 via a bracket so as to be rotatable left and right.A cam roller 13 is protruded from the intermediate portion and is pivotally supported, and this cam roller 13 is engaged with a large cam groove (not shown). At the same time, the rotation of the large cam causes the back-and-forth moving lever 12 to reciprocate in the back-and-forth direction of the knitting machine (the left-right direction in FIG. 1) at a predetermined timing. A link member 14 is connected to the upper part of the longitudinally movable lever 12, and the link member 1
The tip of the rail 6 is pivotally supported by the end of the lower hook plate 3.
The lower hook plate 3 is connected to a shaft 15 protruding from the shaft of a roller 5 that rolls on the outer side of the rail 6, and by reciprocating rotation of the back-and-forth moving lever 12, the lower hook plate 3 moves in the front-back direction (left-right direction in FIG. 1) along the rail 6. ).

In addition, in FIGS. 1 to 3, the lower hook drive device on the left side when facing the knitting machine is shown and explained, but the lower hook drive device with the same mechanism as above is also arranged on the right side, and the mechanisms on both sides are the same. As a result, the lower hook plate 3 horizontally arranged at the front of the knitting machine performs a predetermined movement. The shuttle 20 is placed on a receiving frame 21 that moves back and forth in a predetermined manner, and on the receiving frame 21 that supports the rear part of the shaft 20, a line removing member 22, which is formed by bending a plate material into a substantially L-shaped cross section, is attached along the longitudinal direction. It will be attached. A comb 23 is placed below the upper hook (not shown) and is fixed to the main body frame 1 via an angle member.

Next, the operation of the lower hook driving device will be explained.

A knot of the net is made using the warp threads and the weft threads in the shuttle by rotating the upper hook (not shown) above the comb 23, but in the middle of making the knot, the lower hook 2 operates as follows to pull out the warp threads and remove the threads from the shuttle. Shuttle 20 by removing the thread at the rear lower part of 20.
pass through.

That is, in the middle of forming a knot, the lower hook plate 3, which had been located in the middle of the rail 6, is moved by a large cam (not shown) to the left (forward) by the forward and backward moving lever 12 until it reaches the position shown by the solid line in FIG. By rotating, the lower hook 2 is moved forward and inserted into the location where a nodule is being formed. Then, with the warp threads hooked onto the lower hooks 2 by the operation of a thread swinger (not shown), the forward and backward moving lever 13 is rotated from the position shown by the solid line in FIG. 1 to the position shown by the imaginary line in the right direction.
moves to the right (rearward) inside the rail 6 which is in a substantially horizontal state, the lower hook plate 3 moves to the rearmost part on the rail 6, and the roller 4 rides on the sub-rail 9.
This pulls the warp yarns out from the knot,
Subsequently, the vertical lever 8 is rotated downward, and the rear end of the rail 6 is rotated downward as shown in FIG. At this time, since the upper part of the sub-rail 9 is pulled by the connecting rod 11, it rotates downward relative to the rail 6 using the pin 10 as a fulcrum and moves to the position shown in FIG. 4. When the forward and backward movement lever 12 rotates slightly forward, the roller 4 supporting the front part of the lower hook plate 3 moves on the lower sub-rail 9, so that the lower hook plate 3 is in a forwardly inclined state. Lower hook 2
The lower hook 2 holding the warp threads is pushed under the thread removing member 22 on the lower side of the rear end of the shuttle 20, as shown in FIG. At this time, the warp threads are easily and smoothly removed from the lower hook 2 due to the thread removing member 22 and the downwardly inclined posture of the lower hook 2, pass under the shuttle 20, and are pulled back to the knotted location.

After that, the longitudinal lever 13 is rotated a little backwards to return the lower hook plate 3 and rollers 4 and 5 to the rear end of the rail 6, and the vertical lever 8 is rotated upward to move the rails 6 and 9 together. When the state is returned to the state shown in Fig. 1, the lower hook plate 3 is moved forward again by forward rotation of the forward and backward moving lever 12 at the timing of the next knot, the lower hook 2 is thrust into the next knot, and then The same operation as above is repeated as the warp threads are pulled out.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, and that design changes can be made within the scope of the technical idea of the present invention.

<Effects of the Invention> As explained above, according to the lower hook drive device for a knitting net machine of the present invention, the rail that engages the two rollers that are pivoted at shifted positions at the end of the lower hook plate is attached to the main body. The frame is pivotally supported so that it can move up and down, and the inner part of the rail from approximately the middle part to the tip is separated as a subrail, and the subrail is pivoted so that it can rotate downward at the tip of the rail, and the upper part of the subrail is is connected to the main body frame via a connecting rod, and when the rail is rotated downward, the sub-rail is configured so that its front part rotates downward around the tip of the rail. Therefore, the lower hook plate of the lower hook, which has pulled out the warp yarns from the point where the knot is to be made, moves the inner roller forward onto the downwardly inclined sub-rail, and with the lower hook fully tilted downward, the thread removing member The warp threads can be inserted under the lower hook, and the warp threads hooked to the lower hook can be easily and smoothly removed at a certain timing. Therefore, unlike conventional methods, the warp yarns are difficult to remove from the lower hook, and the timing of the removal is uneven, resulting in uneven mesh.The large frictional resistance when the warp yarns are removed from the lower hook makes it difficult for the threads and the lower hook to separate. The drawback of vibration can be eliminated. moreover,
Compared to the conventional two-rail type device, the lower hook can be plunged sufficiently downward to the thread release position without rotating the rail very much, so the range of rotation of the rail is smaller and the load on it is smaller. , wear on various parts is reduced, and high-speed operation of the knitting machine is also possible.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front view of the lower hook drive device, FIG. 2 is a right side view of the same, FIG. 3 is a plan view of the same, and FIG. 4 is a thread The front view when removed, Figure 5 is a perspective view of the conventional lower hook drive device, and Figure 6 is a perspective view of the conventional lower hook drive device.
The figure is an explanatory diagram showing the movement of the rail and lower hook. 1...Main frame, 2...Lower hook, 3...Lower hook plate, 4, 5...Roller, 6...Rail, 9...Sub rail, 10...Pin.

Claims (1)

[Scope of Claims] 1. Two rollers are pivotally supported at the ends of a lower hook plate on which a number of lower hooks are arranged in parallel, and a rail is rotatably supported at the base part of the main body frame. At the same time, a vertically moving lever for vertically rotating the rail is connected to the rail via a link member, and the roller rolls within the rail to move the lower hook of the knitting machine. In the hook driving device, the inner part of the rail from approximately the middle part to the tip part is separated as a subrail, the subrail is pivotally supported at the tip part of the rail so as to be rotatable downward, and the upper part of the subrail is connected to a connecting rod. The sub-rail is connected to the main body frame via a sub-rail, and when the rail is rotated downward, the sub-rail is configured to rotate its front part downward about the tip of the rail. Lower hook drive device for netting machine.