JPH024147Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] In the present invention, a looper receives a pile yarn loop formed by piercing with a needle, and a knife cooperates with the looper to shear the pile yarn loop as necessary. It relates to a tufted machine that forms loop pile or cut pile on a base fabric,
More specifically, the present invention relates to a tufted machine that can be used to form piles at desired locations on a base fabric.

[Conventional technology]

Conventionally, when forming piles in discrete locations on a base fabric, after tufting each required location, a continuous pile yarn (usually called "calite") between the needle and the base fabric was used. (hereinafter referred to as "empty fibers"), the base fabric separated from the needle is moved, and the next place to be tufted is set directly below the needle.

The inventor of this application has repeatedly devised ways to automate this empty thread cutting work, and has published a patent application for a tufting machine exclusively for cut piles in Japanese Patent Application No. 176147-1982, and a patent application for a tufting machine exclusively for loop piles filed simultaneously with this application. An empty fiber cutting device is disclosed.

[Problem that the invention attempts to solve]

These automatic empty fiber cutting devices are equipped with a knife attached to the tufting machine that cooperates with a looper to shear the pile yarn loop, and the knife drive device operates independently of the transmission mechanism from the needle drive device to the needle. , and in the stopped state where the needle is pulled out from the base fabric, let the knife act on the looper,
The locked pile yarn loop is sheared to cut the empty fibers continuing from the needle to the base fabric.

According to such an automatic empty fiber cutting device, the length of the empty fiber is equivalent to the distance from the needle eye (thread passage hole) to the looper, and the end of the empty fiber is pulled out from the base fabric as the base fabric moves. However, the distance from the needle eye to the looper is usually 10 to 20 mm.
, and the inner diameter of the needle eye in the axial direction is 7 to 10
Since the empty fibers are relatively large (mm), they easily come off from the needle eye, and there is a concern that the empty fibers that have come off may have to be re-passed through the needle eye when tufting is started again.

[Purpose of invention]

Therefore, the present invention has been developed to provide a tufted machine equipped with the above-mentioned empty thread cutting mechanism, so that the empty fibers are cut more than the distance corresponding to the distance from the needle eye to the looper so that the empty fibers do not come off the needle eye during the movement of the base fabric. It is intended to be stretched automatically.

[Structure of the idea]

The tufted machine according to the present invention includes a needle, a looper, a knife and their driving devices, a fixed yarn guide that guides the pile yarn to the needle eye, and a movable yarn guide that moves in a direction across the pile yarn path from the needle eye to the fixed yarn guide. The yarn guide is equipped with a yarn guide and its driving device, and is characterized in that the driving device for the knife and the movable yarn guide is independent of the transmission mechanism from the needle driving device to the needle so that it operates independently when the needle is stopped. It is something to do.

Here, the expression that the drive devices for the knife and the movable yarn guide are independent from the transmission mechanism from the needle drive device to the needle means that those drive devices have separate power sources such as motors. Rather, it means that although the power source is the same, the needle drive device can be separated from the power source as appropriate by means of a clutch or other mechanism.

The looper drive device does not need to be independent from the needle drive device, but especially in cut pile tufted machines, it should be separated from the transmission mechanism from the needle drive device to the needle so that the looper operates when the needle is stopped. is desirable.

Further, in a tufting machine exclusively for loop piles, it is desirable that the knife drive device and the needle and looper drive devices have separate power sources so that the knife moves away from the looper and stops during the tufting process.

In addition, in the present invention, the cut pile tufted machine and the loop pile tufted machine do not depend on the presence or absence of a knife, but rather the tip of the looper operates in the direction of conveyance of the base fabric and cooperates with the needle, or They are distinguished by whether they operate in the opposite direction to the conveying direction and cooperate with the needle, and those that operate in the former manner are called tufted machines exclusively for loop piles.
A machine that operates in the latter manner is considered a tufted machine exclusively for cut piles, but this distinction does not change the concept of conventional tufted machines.

[Embodiment 1] Figures 1 and 2 illustrate an embodiment of the present invention in a tufted machine exclusively for loop piles, in which 11 is a needle, 12 is a needle block, and 13 is a push rod, which are connected to the push rod 13. The connecting rod 14 is driven vertically by a crank 15, and the pile yarn 17 carried by the needle eye 16 is inserted into the base fabric 18 to form a pile yarn loop 19.

Reference numeral 21 designates a looper for receiving the pile yarn loop 19, which is carried on the block 22 and is firmly attached to the locking shaft 25 via arms 23 and 24.

The locking shaft 25 is rockingly driven by a crank 28 via a rocking rod 26 and a connecting rod 27, so that the looper 21 receives the pile yarn loop 19 from the needle 11, and when the needle is pulled out from the base fabric 18, Retracts when inserted,
The pile yarn loop 19 is released and reciprocated to form a loop pile.

The shafts 20 and 29 of the cranks 15 and 28 that drive the needle 11 and the looper 21 are rotationally driven by the same drive motor (not shown).

31 is a knife and 32 is a knife block. The knife block 32 is attached to a slider 35 that slides up and down through a through hole of a guide block 34 attached to a fixed shaft 33.

The lower end 36 of the slider 35 is connected to an air cylinder 37, and is thereby driven up and down.

The side surface of the knife 31 is in elastic pressure contact with a guide 39 protruding from the tip of an arm 38 attached to the fixed shaft 33, so that when the air cylinder 37 pushes up via the slider 35, the tip of the knife 31 is pressed against the looper. It is designed so that it is guided so as to engage with the ridge of the bottom surface of the looper 21, come into pressure contact with the side surface of the looper 21, and slide without hitting the bottom surface of the looper 21.

41 is a yarn guide that is attached to the looper block 12 and moves up and down, and 42 is a fixed yarn guide that is attached to the frame.
A movable yarn guide 45 is provided between these and supported by an air cylinder 42.

This air cylinder 43 reciprocates so that the movable yarn guide 45 crosses the yarn path 44 of the pile yarn between the yarn guides 41 and 42, and this reciprocation causes slack in the pile yarn between the yarn guides 41 and 42. It's getting old.

The drive motor that rotates the shafts 20 and 29 and the air valve (not shown) that drives the air cylinder 43 can be operated independently.

Next, to explain the operating procedure of the tufting machine shown in FIGS. 1 and 2, the required location of the base fabric 18 to be tufted is set below the needle operating line O-O', and the driving motor is turned on. Enter, needle 1
1 and a looper 21 cooperate to tuft the loop pile.

Next, when the tufting is completed and the needle 11 comes out of the base fabric 18, the looper 21 has not yet completely retreated from the needle operating line O-O', so the pile yarn loop 19 has not come off the pile locking rod part 40. The needle 11 and the looper 21 are stopped at a certain point, and then the air cylinder 43 is operated to make the movable yarn guide reciprocate once, and the air cylinder 37 is operated to drive the knife 31 up and down.
Thereby, the pile yarn loop 19 is sheared in cooperation with the looper 21.

Thereafter, the base fabric 18 is moved, the next location to be tufted is set on the needle operating line O-O', and tufting is restarted.

The drive motor and air cylinder are operated manually or automatically using a computer or the like that stores the above procedures.

[Embodiment 2] FIG. 3 illustrates an embodiment of the present invention in a cut pile machine, in which the needle drive shaft 25 is connected to a gear belt 51 and a gear 52 from a main shaft 49 rotatably driven by a driving motor to a gear 50. It is detachably connected via clutch discs 54 and 55 to an intermediate shaft 53 which is rotatably driven via the clutch discs 54 and 55.

63 is an air cylinder for engaging and disengaging these clutch discs 54 and 55.

The looper drive crank 28 is connected to the main shaft 4
9 and is directly rotationally driven.

Therefore, if the air cylinder 63 is operated to separate the clutch plates 54 and 55, the needle 11
can be stopped and only the looper 21 can be operated.

In this embodiment, unlike the loop pile tufted machine shown in Embodiment 1, the knife block 22 has a shaft 5 rotatably supported on the frame.
6 via arms 57 and 58 in a rotatable manner. A rocking rod 59 attached to the shaft 56 and a rocking rod 61 attached to the rocking shaft 25 are connected to a connecting rod 60, so that the shaft 56 swings and rotates in synchronization with the rocking shaft 25. As a result, the knife 31 carried by the knife block 32 reciprocates up and down every tufting cycle, and cooperates with the looper 21 to shear the pile yarn loop 19 and form a cut pile.

The movable yarn guide 45 is connected to the air cylinder 4
It is carried by a slider 62 driven by No. 3.

In the figure, reference numeral 64 denotes a base fabric pressing plate, which is driven up and down by an air cylinder 66 via a press rod 65. Reference numeral 67 is a compression coil spring that presses the press rod 65 and elastically urges the base fabric pressing plate 64 toward the base fabric 18.

Next, to explain the operating procedure of the tufted machine shown in FIG. 3, like the tufted machine shown in FIGS. With the clutch discs 54 and 55 engaged by the air cylinder 63, the driving motor is input, and the needle 11, looper 21, and knife 31 are made to work together to tuft the cut pile.

Next, when the tufting is completed and the needle 11 comes out of the base fabric 18, the air cylinder 43
to move the movable yarn guide 45 back and forth once,
Thereafter, the air cylinder 63 is operated to separate the clutch discs 54 and 55, and then the driving motor is input to cause only the looper 21 and knife 31 to work together to perform a shearing action.

In the tufted machine exclusively for cut piles, two or more pile thread loops 19, 19'... are always locked in the pile locking rod part 41 of the looper 21, and the knife 31 cooperates with the looper 21.
In each tufting cycle, one pile yarn loop 19 that is first locked is sheared to form a cut pile, and therefore, at the end of tufting, one or more pile yarn loops 19' are cut into a pile. However, when the needle 11 is stopped and only the looper 21 and knife 31 are operated as described above, all of the pile yarn loops 19' that have been locked are tangled with the locking rod portion 40. ... are sequentially sheared to form a cut pile, and thus the ends 48 of the empty fibers 47 become the ends of the sheared cut piles and can be extracted from the base fabric 18.

After doing this, the base fabric 18 is moved and tufting is restarted.

It goes without saying that the operation in this case can also be performed automatically by a computer or the like that has stored the above procedure.

[Effect of idea]

According to the present invention, since a movable yarn guide that traverses the pile yarn path is provided, the movable yarn guide is operated to pull out extra pile yarn before shearing the pile yarn loop with a looper and knife and cutting the empty yarn. , it is possible to automatically loosen the pile yarn near the needle eye.

The ends of the empty fibers sheared by the looper and knife are pulled against the base fabric as the base fabric moves,
The pile yarn that was loosened earlier is pulled out from the needle eye until it comes out of the base fabric.

Therefore, the end portion of the empty fiber that has come out from the base fabric is
The distance is longer than the distance from the needle eye to the looper, and therefore, the base fabric will not fall off from the needle eye during the movement process.

According to the present invention, these empty fiber shearing operations and empty fiber stretching operations are automatically performed, thus improving the tufting efficiency, and thus the present invention is practical.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the essential parts of the tufted machine for loop piles according to the present invention, Fig. 2 is a side view of a portion parallel to the needle operating line in Fig. 1, and Fig. 3 is the tufted machine for cut piles according to the present invention. FIG. 2 is a perspective view of a main part of the machine, showing a part of the machine as seen through. 11... Needle, 12... Needle block, 13... Push rod, 14... Connecting rod,
15...Crank, 16...Needle eye, 17
... Pile thread, 18 ... Base fabric, 19 ... Pile thread loop, 20 ... Shaft, 21 ... Looper,
22...Block, 23, 24...Arm, 25
...Rocking shaft, 26...Rocking rod, 27
... Connecting rod, 29 ... Shaft, 31 ... Knife, 32 ... Knife block, 33 ... Fixed shaft, 34 ... Guide block, 35 ... Slider, 37 ... Air cylinder, 38 ... Arm, 39 ...Guide, 40...Pile retaining rod, 4
1, 42... Yarn guide, 43... Air cylinder, 44... Yarn path, 45... Movable yarn guide, 47... Empty fiber, 48... Empty fiber terminal, 49...
Main shaft, 50, 52... Gear, 51...
...Gear belt, 53...Shaft, 54,55
...Clutch plate, 56...Shaft, 57...Arm, 59, 61...Swivel rod, 60...Connection rod,
62...Slider, 63...Air cylinder, 64...Base fabric presser plate, 65...Press rod, 66...Air cylinder.

Claims (1)

[Claims for Utility Model Registration] A needle, a looper, a knife, and a driving device thereof; A fixed yarn guide that guides the pile yarn to the needle eye; A pile yarn path from the needle eye to the fixed yarn guide A movable yarn guide that moves in the transverse direction and its drive device; the drive device of the knife and movable yarn guide is independent of the transmission mechanism from the needle drive device to the needle so that it operates independently when the needle is at rest; What we do: A tufted machine featuring the following.