JPH0623590Y2 - Tufting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tufting machine for manufacturing a raw machine (kibata) of a tufted carpet (hereinafter, simply referred to as carpet in the present specification), and Relates to a tufting machine suitable for manufacturing a raw machine having two types of cut piles having different heights.

[Prior Art] Conventionally, as a carpet in which piles are planted on a base cloth, all piles are loop piles having the same height,
It is common that all piles consist of cut piles of the same height, and those that combine a cut pile with a high pile height and a loop pile with a low pile height, but in recent years,
Along with the sophistication of carpets, a combination of a cut pile with a high pile height and a cut pile with a low pile height has been proposed.

A tufting machine used for manufacturing such a type of carpet is provided with two sets of a normal yarn feeding mechanism and a cut pile forming mechanism. That is, each yarn feeding mechanism is provided with a large number of needles for driving the base yarn into the base fabric by vertical movement, and a feed roller for supplying the raw yarn to the needles. Further, each cut pile forming mechanism moves back and forth in synchronization with the vertical movement of the needle, and moves up and down in synchronization with the vertical movement of the needle and a looper that captures the raw yarn that has been driven into the base fabric. , And a knife for cutting the raw yarn captured by the looper.

FIG. 4 schematically shows a state in which two types of cut piles of high and low are planted from the back surface of the base fabric 31 sent to the rear (left side of the figure).
Is indicated by a rectangle, and the low cut pile back stitch 33 is indicated by an ellipse. Further, in this figure, a pair of front and rear needle bars 34, 35 are provided, and the front needle bar 34
A needle 36 for forming a high cut pile (backstitch 32) and a needle 37 for forming a low cut pile (backstitch 33) on the rear needle bar 35 in a direction orthogonal to the plane of the drawing. Installed. Then, the base cloth 3 is formed by the front and rear needles 36, 37.
The rear needle 37 is arranged at an intermediate position between the left and right adjacent needles 36 on the front side so that the high and low cut piles planted in 1 do not overlap in the moving direction of the base fabric 31.

[Problems to be solved by the invention] However, in the tufting machine having the conventional structure, two sets of the yarn feeding mechanism and the cut pile forming mechanism are required, so that the structure of the entire tufting machine becomes complicated and maintenance and inspection is very difficult. There is a problem that it becomes complicated.

In the tufting machine, the same needle 36,
The cut pile that can be formed by 37 is limited to either one of the high and low cut piles, and the height is different.
It is not possible to form a kind of cut pile. Therefore, there is a problem in that the types of shavings (garbage) obtained can be significantly limited.

An object of the present invention is to form two types of cut piles having different heights with the same needle without using a complicated mechanism, and the arrangement state of the high piles and the low piles can be arbitrarily changed, and eventually various cut piles can be formed. It is to provide a tufting machine capable of manufacturing a greige machine with a handle.

[Means for Solving the Problems] Therefore, in order to achieve the above-mentioned object, the present invention provides a large number of vertically arranged reciprocating motions so that a base yarn can be driven into a base fabric fed rearward. A needle, and a lower catching portion for catching the raw yarn driven by each needle, and a lower catching portion provided above the lower catching portion, the needle being driven by the needle so as to reciprocate in the substantially the same direction as the needle. A looper having an upper catching portion having a locking projection for catching the raw yarn separated from the lower catching portion and locking it in a slipping-off manner, and locking the raw yarn caught in the lower catching portion of the looper so as not to slip out. Engagement / disengagement selection means that can take a restricting position and an allowance position that allows the raw yarn once caught in the lower catching portion to separate, and a reciprocating motion in a substantially vertical direction in synchronization with the movements of the needle and looper. Is possible, A tufting machine including a lower cutting blade for cutting the raw yarn locked in the lower catching portion of each looper, and a knife having an upper cutting blade for cutting the raw yarn locked in the lower catching portion Is the gist.

Further, it is preferable that the length of the upper capturing portion is longer than that of the lower capturing portion.

[Operation] When the engagement / disengagement selection means is in the restricted position, it operates as follows. The raw yarn driven into the base fabric by the needle is captured by the lower capturing portion of the looper. The raw yarn caught by the lower catching portion is locked by the engagement / disengagement selecting means so as not to slip out, and is cut by the lower cutting blade of the vertically moving knife to form a high cut pile.

Further, when the engagement / disengagement selection means is in the allowable position, it operates as follows. The raw yarn driven into the base fabric by the needle is once captured by the lower capturing portion. At this time, since the original yarn is not locked by the engagement / disengagement selection means, it is detached from the lower catching portion and captured by the upper catching portion in the process of retracting the looper.
Since the upper catching portion is formed with the locking projection, the captured raw yarn is locked so as not to slip out, and is cut by the upper cutting blade of the vertically moving knife to form a low cut pile.

In particular, when the length of the upper catching portion is made longer than that of the lower catching portion, the raw yarn separated from the lower catching portion is reliably caught by the upper catching portion when the engagement / disengagement selecting means takes the allowable position.

[Embodiment] An embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a pair of front and rear spike rollers 1 and 2 are rotatably provided on the tufting machine,
The base cloth 3 is fed backward (to the left in the figure) in a tensioned state by the spike rollers 1 and 2. A needle bar 4 extending in the left-right direction (direction orthogonal to the paper surface) is disposed above the base cloth 3 between the front and rear spike rollers 1 and 2 so as to be capable of reciprocating in the vertical direction. 4 a large number of needles (only one is shown in the figure) 5
Are juxtaposed.

As shown in FIG. 2 (a), a hole 5a is provided at the lower end of the needle 5, and the raw yarn 6 supplied by a feed roller (not shown) is passed through this hole 5a. Therefore, when the needle 5 moves up and down,
Is driven.

As shown in FIG. 1, the front and rear spike rollers 1, 2
A looper shaft 7 that rotates within a certain angle in synchronization with the vertical movement of the needle 5 is supported at a lower position of the base cloth 3 between them, and a lower end of a rocker arm 8 is fixed on the looper shaft 7. . Similarly, a drive shaft 10 that rotates within a certain angle in synchronization with the vertical movement of the needle 5 is supported at a position near the rear of the rocker arm 8, and a rotation lever 9 fixed on the drive shaft 10 has a connecting link. It is connected to the upper part of the rocker arm 8 via 11. Therefore, when the needle 5 moves up and down, the upper end of the rocker arm 8 reciprocates substantially in the front-rear direction in synchronization with the movement.

A looper bar 12 is fixed to the upper end of the rocker arm 8, and a large number of loopers 13 corresponding to the needles 5 are attached to the looper bar 12. Fig. 2 (a)
As shown in FIG. 5, a pair of upper and lower catching portions 14 and 15 for catching the raw yarn 6 driven into the base fabric 3 by the needles 5 are integrally formed at the front end portion of each looper 13. The lower capturing portion 15 is formed so as to become thinner toward the front end,
The captured raw yarn 6 is easy to fall off. Also,
The upper catching portion 14 is formed to be slightly longer than the lower catching portion 15, and a locking projection 14a for locking the captured raw yarn 6 is integrally formed at the lower front end of the upper catching portion 14. There is. In the present embodiment, the length of the upper capturing portion 14 is set to be about 0.5 mm longer than that of the lower capturing portion 15.

A guide groove 1 extending in the front-rear direction is provided under each looper 13.
6 is formed, and a spring member 17 as engagement / disengagement selection means is attached to the guide groove 16 so as to be slidable in the front-rear direction. The spring member 17 is in the form of an elongated thin plate in the front-rear direction, the front end portion thereof is bent upward to form a locking piece 18, and the upper end of the locking piece 18 is elastically biased by the lower catching portion 15 to slide. It is like this. The spring member 17 is biased rearward by a spring (not shown).

As shown in FIG. 1, the spring member 17 is connected to the compressor 20 through a pipe 19, and the electromagnetic valve 21 interposed in the pipe 19 is controlled to open and close, so that the spring member 17 is moved to the position shown in FIG. As shown in (a), the restricting position I at which the raw yarn 6 captured by the lower catching portion 15 is locked so as not to fall out, and, as shown in FIG. 3 (a), once caught by the lower catching portion 15. The allowable position II is set so as to allow the loose yarn 6 to be released.

As shown in FIG. 1, a knife drive shaft 22 is provided between the looper shaft 7 and the drive shaft 10 so as to rotate within a certain angle in synchronization with the vertical movement of the needle 5.
Is supported and the knife rocker arm 2 is provided on the outer periphery thereof.
3 is fixed. A large number of knives 26 are attached to the knife rocker arm 23 via a knife bar 24 and a knife block 25, and these knives 26 reciprocate in a substantially vertical direction in synchronization with the needle 5 and the looper 13. Has become.

As shown in FIG. 2 (a), the upper end of each knife 26 is brought into sliding contact with the lower edge of the upper catch 14 of the looper 13 to cut the raw yarn 6 locked by the upper catch 14. The upper cutting edge 26a is formed. Further, the lower edge of the notch 27 provided in the upper portion of each knife 26 is brought into sliding contact with the lower edge of the lower catching portion 15 of the looper 13 to cut the raw yarn 6 locked by the lower catching portion 15. The lower cutting edge 27a for forming is formed.

Next, the operation and effect of this embodiment configured as described above will be described.

First, the movement of each member when the spring member 17 is moved to the restriction position I will be described with reference to FIGS. 2 (a) to 2 (f). FIG. 2 (a) shows a state in which the needle 5 moves downward, the raw yarn 6 is driven into the base fabric 3, the looper 13 moves to the most retracted position, and the knife 26 reaches the top dead center. There is.

When the needle 5 further moves downward from the state of FIG. 2 (a), the looper 13 advances and the knife 26 starts descending.
Then, as shown in FIG. 2B, when the needle 5 reaches the bottom dead center, both upper and lower catching portions 14 and 15 start to enter between the needle 5 and the raw yarn 6. At this time, the raw yarn 6 tries to enter between the lower catching portion 15 and the spring member 17 against the elastic biasing force of the spring member 17. Further, the knife 26 has its own upper and lower cutting blades 26a and 27a having both upper and lower capturing portions 1.
It descends to a position where a slight gap is formed between the lower edges of the Nos. 4 and 15.

Then, as shown in FIG. 2 (c), when the needle 5 starts to rise from the bottom dead center, the looper 13 moves to the most advanced position and enters between the needle 5 and the raw yarn 6. The lower catching portion 15 catches the raw yarn 6 and the knife 26 reaches the bottom dead center. When the needle 5 further rises, the looper 13 retracts and the knife 26 starts to rise. At this time, since the locking piece 18 of the spring member 17 is elastically biased toward the side surface of the lower catching portion 15, the caught raw yarn 6 does not fall out.

Further, when the needle 5 reaches the top dead center as shown in FIG. 2 (d), the looper 13 continues to retreat and the knife 26 also continues to rise. As a result, the loop L is formed in the lower capturing portion 15. Then, as shown in FIG. 2 (e), when the needle 5 descends again and sinks into the base fabric 3, the looper 13 is most retracted, and the knife 26 reaches the top dead center. In this way, one cycle of the needle 5, the looper 13 and the knife 26 is completed.

2 (a) to 2 (e) have a plurality of periodic motions (usually 3
Repeatedly, a plurality of loops L are sequentially formed in the lower capturing portion 15. The loop L formed first among these loops L moves along the lower edge of the lower catching portion 15 as the base fabric 3 is fed rearward, and is moved by the lower cutting edge 27a of the knife 26 that rises. Be disconnected.
Therefore, as shown in FIG. 2 (f), when a new loop L is formed in the looper 13, the previously formed loop L is continuously cut to form a high cut pile Ch. .

Next, the movement of each member when the spring member 17 is moved to the allowable position II will be described based on FIGS. 3 (a) to 3 (d). FIG. 3A shows a state in which the needle 5 descends to the bottom dead center and both upper and lower catching portions 14 and 15 start to enter between the needle 5 and the raw yarn 6. At this time, the raw yarn 6 tries to enter between the lower catching portion 15 and the spring member 17 against the elastic biasing force of the spring member 17. Also, the knife 26
The upper and lower cutting blades 26a and 27a of its own
It has descended to a position where a slight gap is formed between the lower edges of Nos. 4 and 15.

Then, as shown in FIG. 3 (b), when the needle 5 starts to rise from the bottom dead center, the looper 13 moves to the most advanced position, and the upper and lower catching portions 14 and 15 are moved to the needle 5 and the raw yarn. 6 and the raw yarn 6 is once caught by the lower catching portion 15. When the needle 5 further rises, the looper 13 retracts and the knife 26 starts to rise. At this time, since the locking piece 18 of the spring member 17 is retracted to the permissible position II, the raw yarn 6 once caught in the above-mentioned state is moved to the lower catching portion 1.
Leave from 5. The separated yarn 6 is pulled upward as the needle 5 moves up. At this time, since the upper catching portion 14 is formed to be slightly longer than the lower catching portion 15, the raw yarn 6 is caught by the upper catching portion 14 in the process of being pulled as shown in FIG. 3 (c). . Since the locking protrusion 14a is formed at the front end of the upper catching portion 14, the captured raw yarn 6 does not fall out of the upper catching portion 14. In this way, the loop L
Is formed.

When the periodic motions shown in FIGS. 3A to 3C are repeated a plurality of times, a plurality of loops L are sequentially formed in the upper capturing portion 14. The loop L formed first among these loops L moves along the lower edge of the upper catch 14 as the base fabric 3 is fed backward, and rises up.
Is cut by the upper cutting blade 26a. Therefore, the third
As shown in FIG. 7D, when a new loop L is formed on the upper capturing portion 14, the loop L previously formed is continuously cut to form the low cut pile Cl.

Thus, according to the tufting machine of this embodiment,
Unlike the prior art, it is not necessary to use two sets of the yarn feeding mechanism and the cut pile forming mechanism, so that the mechanism becomes simpler and maintenance and inspection becomes easier. Further, in this embodiment, by setting the position of the spring member 17 to either the restricting position I or the allowing position II, two types of cut piles Ch and Cl having different heights can be formed with the same needle 5.
Moreover, since the position of the spring member 17 can be easily switched to the electromagnetic valve 21 by opening and closing, the arrangement state of the high cut pile Ch and the low cut pile Cl can be arbitrarily changed, and eventually, various machines with various patterns are manufactured. It becomes possible.

[Advantages of the Invention] As described in detail above, according to the present invention, two types of cut piles having different heights can be formed on the same needle without using a complicated mechanism, and high piles and low piles can be formed. It is possible to arbitrarily change the arrangement state of and, and eventually to produce greige with various patterns.

Further, since the length of the upper catching portion is longer than that of the lower catching portion, the raw yarn separated from the lower catching portion can be reliably caught by the upper catching portion to form the low cut pile.

[Brief description of drawings]

1 to 3 show an embodiment embodying the present invention.
The figure is an explanatory view showing the outline of the tufting machine, and FIGS. 2 (a) to (f) are partially enlarged front views showing the operations of the needle, the looper and the knife when forming a high cut pile.
3 (a) to 3 (d) are partially enlarged front views showing the operations of the needle, the looper and the knife when forming a low-cut pile, and FIG. It is explanatory drawing which shows the arrangement | positioning state of a pile of a kind. 3 ... Base cloth, 5 ... Needle, 6 ... Raw thread, 13 ... Looper, 14 ... Upper catching portion, 14a ... Locking protrusion, 15
...... Lower catching section, 17 ...... Spring member as engagement / disengagement selection means, 26 ...... Knife, 26 a ...... Upper cutting edge, 27 a
… Lower cutting blade, I… Regulated position II… Allowed position.

Claims (2)

[Scope of utility model registration request] 1. A base yarn (3) sent to the rear, and a raw yarn (6).
A plurality of needles (5) arranged so as to be capable of reciprocating in the vertical direction, and a plurality of needles (5) reciprocally movable in the front-back direction in synchronization with the movement of the needles (5). The lower catching portion (1) for catching the raw yarn (6) driven by (5)
5) and the upper catching portion which is located above the lower catching portion (15) and has a locking protrusion (14a) for catching the raw yarn (6) detached from the lower catching portion (15) and locking it so that it cannot be pulled out. The looper (13) formed with (14) and the regulation position (I) for locking the raw yarn (6) caught by the lower catching portion (15) of the looper (13) so as not to slip out.
And an engagement / disengagement selection means (17) capable of adopting a permissible position (II) that allows the raw yarn (6) once trapped in the lower trapping portion (15) to disengage, and the needle (5) and looper. A yarn (6) provided so as to be able to reciprocate in a substantially vertical direction in synchronism with the movement of (13) and locked to the lower catching portion (15) of each looper (13).
A knife (26) having a lower cutting blade (27a) for cutting the yarn and an upper cutting blade (26a) for cutting the raw yarn (6) locked in the upper catching portion (14). A tufting machine featuring. 2. The tufting machine according to claim 1, wherein the length of the upper catching portion (14) is longer than that of the lower catching portion (15).