JPH0220739B2 - - Google Patents

Abstract

1. Double stroke open shed jacquard machine with lifters which have three projections, are guided with play at at least one stationary screen, arranged between the lifting griffs, which do not intersect one another, and are supported in their lower shed position on the lifter base, wherein one lifting griff box, preferably the lower one, is guided in the contact region of the lifters such that it moves laterally, characterized in that the lifters (1) are constructed with one arm, are secured against rotation about their axis and their projections (2, 3), associated with the lifting griffs (6, 7) are directed towards opposite sides, the lifters (1) being supported in the impressing direction of the needles, on the screen (9) disposed between the lifting griffs (6, 7) whilst avoiding a further screen arranged below the lifting griffs (6, 7) and an additional screen (12) being provided above the open shed position of the upper lifting griff (6).

Description

DETAILED DESCRIPTION OF THE INVENTION A double-acting shedding jacquard is a loom shedding device for weaving irregular patterns. The warp needles, which raise and lower the warp threads, are moved by a knife box which moves in opposite directions; for this purpose the warp needles are provided with hooks on which the knives can be hooked. The vertical needle is controlled by the horizontal needle when the lifting knife is in its end position. If the vertical needle is to remain in its upper end position, the fixing hook of the vertical needle is hooked onto the fixed knife, so that the vertical needle does not follow the lowering of the lifting knife. If the vertical needle is to remain in its lower end position, the horizontal needle pushes the vertical needle away from the associated knife and prevents it from being dragged away.

However, if a vertical needle hooked to a descending knife meets a rising knife, there is a risk that the rising knife will engage the hook associated with the vertical needle and return the vertical needle to its upper end position.

The underlying purpose of the invention is to prevent the descending vertical needle from being tangled back by the ascending knife.

In order to prevent such undesired entrainment of the vertical needle, in the prior art (German Patent No. 2 344 363) one knife performs a sideward escape movement at the point where the vertical needle intersects with the hook. It's becoming like that.

In this known jacquard, the two knife boxes are arranged at a distance from each other so that they cannot cross each other during their lifting and lowering movements. The vertical needle is constructed in the form of a double wire, one of which acts as a support wire with spring action, and the other wire has three hooks oriented in the same direction, two of which cooperates with the lifting knife and the remaining hook cooperates with the stationary knife.

A grid is arranged between the two knife boxes and below the lower knife box, which limits the displacement of the vertical needle by the horizontal needle.

Therefore, due to the lateral escape movement of one of the knife boxes, the vertical needles attached to that knife are supported by the upper and lower grids, while the vertical needle sections between the grids are supported by the knife making the escape movement. Being made to bend down,
be transformed. This deformation of the longitudinal needles causes the free hooks attached to the upper longitudinal needle wire sections of the grid to be removed from the range of action of the rising knife.

However, due to the escape movement of one of the knife boxes to the side, the friction between the vertical needles and the grid increases significantly, and in some cases, the vertical needles that are hooked on the descending knife and descend are affected by the frictional force. There is a danger that the vehicle will be braked and not be able to descend.

Therefore, the specific purpose of the present invention is to eliminate such drawbacks of the known jacquard, change the configuration of the vertical needles and the arrangement position of the grid, so that when the knife box performs a sideward escape movement, the vertical needles The purpose is to avoid bending and deformation due to being supported by the lattice.

In order to achieve this objective, the configuration of the present invention includes:
A three-hook-type vertical needle is guided with play by at least one stationary grid arranged between non-intersecting movable knife boxes and rests on the bottom plate in the lower end position, one knife box is connected to the vertical needle. In double-acting opening jacquards of the type which are designed to have a lateral escape movement within the range of movement of the hooks cooperating with the knives of the movable knife box face oppositely from each other; Furthermore, the vertical needle is supported in the pushing direction by the horizontal needle by a grid arranged between the movable knife boxes, and no grid is arranged below the lower movable knife box, and the upper movable knife Another grid was provided above the upper end position of the box.

When the knife boxes with a lateral escape movement are lowered, the vertical needle leaves the grid between the two knife boxes and performs a kind of pivoting movement without deflecting.
This pivoting movement is determined solely by the degree of lateral relief movement and the threading tension. The grid located further above the upper movable knife box does not come into frictional contact with the descending vertical needle and is excluded as a source of friction.
Since there is no grid below the lower knife box, no frictional effects occur here either.

The configuration of the present invention will be specifically explained below with reference to the drawings.

The double-acting opening jacquard according to the invention shown in FIG. 1 has two knife boxes or two groups of knives 6, 7 which reciprocate in opposite directions in the vertical direction, and these knife boxes do not intersect with each other. They are placed vertically apart. The vertical needle 1, which is raised and lowered by the knives 6, 7, is pushed laterally under the control of the horizontal needle 5, thereby causing the hooks 2, which are provided on opposite sides of the single wire type vertical needle 1, to be pushed sideways. , 3 are hooked onto or removed from the knives 6, 7 to which they belong. As is well known, the vertical movement of the vertical needles 1 is guided by the fact that each vertical needle 1 is sandwiched between guide rods (not shown) extending parallel to the horizontal needles 5. Therefore, it can be done without any problems. Furthermore, each longitudinal needle 1 has a fixing hook 4, which can cooperate with a stationary fixing knife 8 when the longitudinal needle 1 is in its upper end position.

The cross needle 5 has a driving member 17 for pushing the vertical needle 1 and is moved in a known manner by means of an angle through the auxiliary cross needle section against the action of a spring. The auxiliary horizontal needle section of the horizontal needle 5 is controlled by the auxiliary vertical needle 19, which itself is controlled by the pattern paper 2 on the cylinder 20.
1. The auxiliary vertical needle 19 is the pattern paper 21
Once in the hole, the associated auxiliary transverse needle section is moved into its inactive position. As a result, the associated vertical needle 1 remains in its basic position without being pushed. If, on the other hand, the auxiliary vertical needle 19 does not penetrate into the hole in the pattern paper 21, the associated horizontal needle 5 is pushed by the angle through the auxiliary horizontal needle section, and the associated vertical needle 1 is pushed to the side.

In FIG. 1, the upper knife 6 is in its upper end position and the lower knife 7 is in its lower end position.
The vertical needle 1a is in its lower end position and is not displaced laterally. Therefore, the vertical needle 1a is the knife 7
It will be raised by Vertical needle 1b
is in the upper end position and is also not displaced. The vertical needle 1b is therefore lowered together with the knife 6, but this is prevented by the fixed knife 8.

The vertical needle 1c is in its upper end position and is pushed laterally. These vertical needles 1c are hooks 2
is hung on the knife 6, so that the fixed hook 4 is in a position away from the fixed knife 8. The vertical needle 1c is thus lowered together with the knife 6 into its lower end position. The vertical needle at the upper end position is hook 2
is engaged with the knife 6, so that when descending from the upper end position, it does not descend alone, but always descends together with the knife 6.

The vertical needle 1d is in its lower end position and is pushed out. The hook 3 is thereby in a position disengaged from the knife 7, so that the vertical needle 1d remains in its lower end position.

Between the knives 6, 7 there is a grid 9 along which the vertical needle 1 in the basic position is guided and on which the displaced vertical needle 1 is supported.
The vertical needle 1 in its lower end position is supported on the base plate 10. A second knife is placed above the upper end position of the upper knife 6.
A grid 12 is provided. By the way, vertical needle 1c
When the knife 6 moves toward the lower end position and then descends, the rising knife 7 meets the hook 3 of the vertical needle 1c, and the vertical needle 1c is brought back to the upper end position during its downward movement. It turns out. To avoid this, one knife box, in particular the lower knife box, is designed to perform a lateral escape movement as indicated by arrow 13. This escape movement takes place when the hook 3 passes the knife 7. The mechanism for causing the knife box to escape in this manner is well known and will not be specifically explained.

2 to 9 show various states of the vertical needle 1.

In FIGS. 2 and 3, the vertical needle 1 is in its lower end position. The associated horizontal needle 5 is not pushed laterally. Therefore, in the state shown in Fig. 2, the lower knife 7
will bring the vertical needle 1 to its upper end position.
In the state shown in FIG. 3, the knife 6 is in its lower end position and the knife 7 is in its upper end position. The upper knife 6 therefore carries the vertical needle 1 to its upper end position. In both of these cases, the warp needle 1 is in light contact with the bars of the grid 9 on its hook 2 side and possibly with the fixed knife 8 and is kept in this state by the tension of the thread.

However, unlike the situation shown in FIG. 2, when the vertical needle 1 is pushed sideways by the horizontal needle 5 as shown in FIG. Subject to combined stress with rotational stress. If the upper section of the vertical needle is reinforced and the lower section is flexible, the vertical needle 1 performs primarily a pivoting movement about the grid 9 in the upper section and a deflecting movement primarily in the lower section. In short, in the state shown in FIG. 4, the vertical needle 1 remains in its lower end position even when the knife 7 is raised. Even in the situation shown in FIG. 5, the vertical needle 1 is not carried away by the knife 6 and remains in its lower end position. As can be seen in FIG. 5, the pivoting movement of the vertical needle 1 must be carried out through an angle that ensures that the upper hook 2 is out of the path of movement of the knife 6.

In the state shown in FIG. 6, the vertical needle 1 is in its upper end position and the fixing hook 4 rests on the fixing knife 8. In this case as well, the vertical needles are kept in their basic position and guided between the grid 9 and the fixed knife 8.

However, as shown in FIG. 7, if the vertical needle 1 in the upper end position is pushed sideways, the grid 9
A compound movement of bending and pivoting is performed around the right-hand bar, and the fixed hook 4 is removed from the fixed knife 8. In order to prevent the hook 2 from slipping off the knife 6, the upper grid 12 prevents a pivoting movement of the upper section of the vertical needle 1.

However, the vertical needles are supported by the grid 12 only when they reach their upper end position. Suitable guide elements 14 are provided to ensure that the vertical needles 1 can be inserted into the grid 12 without any hindrance. This guide member is schematically shown in FIGS. 2 to 9 with the upper end extension of the vertical needle 1 being inclined.

Even in the state shown in FIG. 8, the vertical needle 1 has reached its upper end position and is pushed to the side, but in this case the lower hook 3 is hooked onto the lower knife 7.

By the way, FIG. 9 shows a state in which the hook 2 of the vertical needle 1, which descends together with the knife 7, is prevented from being caught by the knife 6. In this case, the lower knife 7 or the knife box regularly performs an escape movement as indicated by the arrow 13 in the middle of its downward stroke. As a result, the vertical needle 1 is tilted from the state shown in broken lines to the state shown in solid lines, and the hook 2 is removed from the path of movement of the knife 6. This pivoting movement of the vertical needle 1 takes place without deformation. This is because the vertical needles 1 have already been removed from the upper grid 12 and are moved away from the grid 9 by the knife 7. However, especially when the warp needle 1 is in contact with the fixed knife 8, the pliable lower section of the warp needle 1 is slightly deflected by the threading tension.
If the vertical needle 1 is hooked to the upper knife 6, even if the lower knife 7 performs an escape movement, the vertical needle 1
is not deformed.

In FIG. 10, one vertical needle 1 is shown. In the upper section, a wire rod is fixed as a reinforcing part 11 to the vertical needle 1 in a plane perpendicular to the horizontal needle 5, for example by welding. As already mentioned, the vertical movement of the vertical needles 1 is guided by the fact that each vertical needle 1 is sandwiched between guide rods (not shown) extending parallel to the horizontal needles 5. However, due to the reinforcing portion 11, the dimension of the vertical needle 1 in this range is larger than the mutual spacing between the guide rods, so the reinforcing portion 11 and the guide rod are engaged with each other, so that the vertical needle 1 is 1 from rotating around its own axis.

The reinforcing part 11 has an upper hook 2, and the part of the vertical needle 1 projecting upward from the hook 2 is slightly inclined, so as to allow the vertical needle 1 to be introduced into the grid 12 without any hindrance. A guide member 14 is formed.

However, as shown in FIG. 11, it is also possible to provide a guide member 14 on the grid 12 itself, which guide member 14 should extend further down than the hook 2 in its lower end position. Can be done.

In the embodiment shown in FIG.
5 in the pushing direction of the horizontal needle 5. This bent portion 15 is arranged in such a position that the horizontal needle 5 presses the upper part of the bent portion 15 when the vertical needle 1 is at the lower end position (see FIG. 4). On the other hand, when the vertical needle 1 is in the upper end position (see FIG. 7), the horizontal needle 5 presses the lower part of the bent portion 15. In this case, the cross needle 5 acts on the lower section 16 after making an empty stroke by the amount of deviation of the bend 15. Despite the horizontal needles 5 being arranged in multiple stages above and below, it is not necessary to adapt the bend 15 of the vertical needle 1 to the position of the associated horizontal needle. Like the reinforcing part 11, the bent part 15 has a dimension of the vertical needle 1 larger than the mutual spacing between the guide rods, and also prevents the vertical needle 1 from rotating by engaging with the guide rod.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of a double-acting opening jacquard, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6,
7, 8, and 9 are schematic diagrams showing various states of the vertical needles, FIG. 10 is a diagram showing one vertical needle, and FIG. 11 is a diagram showing different states of the guide member 14. FIG. 12, a diagram showing the type, shows a vertical needle of another shape. 1-1d... Vertical needle, 2 and 3... Hook, 4...
... fixed hook, 5 ... horizontal needle, 6 and 7 ... knife, 8 ... fixed knife, 9 ... grid, 10 ... bottom plate, 11 ... reinforcement section, 12 ... grid, 13 ... arrow, 14 ...Guiding member, 15...Bending portion, 16...
...Division, 17...Driving member, 19...Auxiliary vertical needle,
20... cylinder, 21... pattern paper.

Claims (1)

Claims: 1. A three-hook vertical needle is guided with play by at least one stationary grid arranged between non-intersecting movable knife boxes, and in the lower end position is guided by the bottom plate. In a double-acting opening jacquard in which one of the knife boxes is supported by the vertical needle and has a sideward escape movement within the movement range of the vertical needle, the vertical needle 1 is constructed in the form of a single wire rod, and the horizontal needle needle 5
The knives 6 and 7 of the movable knife box are guided by a guide extending parallel to the knife box, and are prevented from rotating about their own axis by engagement with the guide. The cooperating hooks 2, 3 are oriented opposite each other, and furthermore the vertical needle 1 is supported in the pushing direction by the horizontal needle by a grid 9 arranged between the movable knife boxes, A double-acting opening jacquard, characterized in that no grating is arranged below the movable knife box, but a further grating 12 is provided above the upper end position of the upper movable knife box. 2. The compound according to claim 1, in which the vertical needle 1 is reinforced in the area of the hooks 2, 3 cooperating with the knives 6, 7 of the movable knife box, and the lower section is constructed to be flexible. Dynamic opening jiacard. 3. A guide in which the vertical needle 1 has a reinforcing part 11 welded to the vertical needle 1 in a plane perpendicular to the horizontal needle 5, and this reinforcing part 11 extends parallel to the horizontal needle 5. A double-acting aperture jacquard according to claim 2, which engages with the double-acting opening jacquard of claim 2. 4. Double-acting opening jacquard according to claim 1, in which the additional grid 12 and/or the vertical needles 1 have guide elements 14 for introducing the rising vertical needles 1 into supporting positions in the grid 12. . 5 In the area of action of the horizontal needle 5, the vertical needle 1 has a bend 15 oriented in the pushing direction of the horizontal needle 5, so that the lower section 16 of the vertical needle 1 is aligned with the upper section. A double-acting opening jacquard according to claim 1, wherein the double-acting opening jacquard is laterally shifted. 6 Lower section 1 shifted to the side of vertical needle 1
6. A double-acting opening jacquard according to claim 5, in which the upper section 6 and the upper section engage a guide extending parallel to the cross needle 5. 7 The bent portion 1 of the vertical needle 1 is located above the bent portion 15 of the vertical needle 1 located at the lower end position and is located at the upper end position.
7. The double-acting opening jacquard according to claim 6, wherein the bending portion 15 is positioned so that the horizontal needle 5 acts at a position below the double-acting opening jacquard.