JP2574539Y2 - Hook drive mechanism of shed forming device of loom - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for driving a hook of a shed forming apparatus for a loom, and the apparatus comprises a plurality of rows of hooks which reciprocate to raise and lower warp yarns passing through the loom.

[0002]

2. Description of the Related Art Such a drive mechanism generally comprises a plurality of lever, bar and crank assemblies driven from a drive shaft of a shed forming apparatus and drives two frames reciprocating in opposite directions. Is known. Each of the frames comprises a number of knives or griffs suitable for cooperating with the hooks, as known to those skilled in the art for raising and lowering the hooks.

[0003] It goes without saying that such interlocking is definitely complicated and therefore the production cost is high. Furthermore, this interlock has a large inertia that hinders speed. In the case of shed forming devices consisting only of a limited number of hooks, the known interlocking mode of knife drive is not suitable due to the aforementioned deficiencies.

[0004]

The problem to be solved is an implementation which eliminates these deficiencies of a multi-hook drive mechanism of a shed forming device for a loom, and which requires the function and production cost of such a device. Is to create something that is particularly well-suited to

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a hook drive mechanism according to the present invention has a number of knives fixed at each end to each of two mutually parallel traction members, The two traction members are driven by at least one drum that is driven alternately, and the traction members are guided in a zigzag manner by a plurality of pulleys so as to obtain a large number of opposed parallel traction ropes, wherein the traction ropes are used. Is fixed to each of the knives.

[0006]

[0007]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the accompanying drawings, a shed forming device comprising a housing 1 is shown, the ends of said housing being closed by lateral flanges 2, 3 supporting small bars 4, between which French bars. Three rows 5a, 5b, 5c of units 5 such as the unit described in Patent No. 8512816
Is fixed. The units rest on the profile 6 by their lower part, the ends of which are likewise fixed to the flanges 2 and 3.

Each unit is composed of a plurality of devices each comprising two movable hooks 7, 8 connected by a pulling rope 9 surrounding the first pulley of the plurality of pulleys of the combination pulley 10, each device comprising two vertical partitions 11 You can easily see that it is provided between them.

[0010] The second pulley of the combination pulley 16 is moored to the bulkhead 11 by one of its ends, but its opposite end is surrounded by an arcade 12 associated with a heald (not shown).

The description of those units well known by the previously cited documents will not be repeated.
The drive of the hooks 7 and 8 is controlled by the knife 1 which is suitably guided by at least one slide, not shown.
3, 14, 15, and 16. The first knife 13 operates the assembly of the hook 7 of the unit columns 5 a. Knife 14 activates hooks 8 in row 5a on the one hand and hooks 7 in row 5b on the other hand. Knife 15 cooperates with a hook 7 of the or column 5 c hook 8 of column 5 b. Eventually, the knife 16 attempts to drive the hooks 8 in the row 5c of units.

According to the invention, the driving of the knives 13 to 16 is effected by at least one traction member 17 which surrounds the drum 18, to which the means are fixed by means of a clamping part 19, said drum being connected to a plurality of hooks 7.
And 8 in alternating strokes of appropriate amplitude.

Said traction member surrounds a number of guide pulleys and thus constitutes a parallel traction rope side which moves oppositely and to which their knives 13 to 16 are fixed.
In a preferred embodiment, the drive mechanism according to the invention consists of two belts 17 or two tapes of metal, for example.
These belts or tapes are fixed to and surround the drum 8. Each belt 17 comprises a first pulley 2 which is laid laterally and outwardly with respect to the row 5a of units 5
0 and then at the bottom of the housing and also a second pulley provided in the plane of symmetry of the row 5a of units. The third pulley 22 is located at the level of the pulley 20 and in the center plane of the intermediate row 5a of units.
Is fixed to the corresponding flange. Fourth pulley 23
Is secured to a corresponding flange at symmetric positions relates midplane to pulley 21 of the column 5 b. After all, the fifth pulley 2
4 is located at the top of the multiple unit row 5c and coaxially with the pulley 23. The pulley 24 can be mounted on a movable shaft and thus constitutes a puller for the belt 17.

Thus, for each belt or tape 17, four traction rope sides W, X, Y and Z are formed which are parallel to the longitudinal axis of the unit 5. For the above device,
A shed forming device of three rows of units is obtained, but of course more than three can be provided by providing a number of guide pulley locations, so that the required number of tow ropes is constituted.

When the drum moves in the direction opposite to the direction of the hands of the clock (in the direction of the arrow F), the knives 13 and 15 move down while the knives 14 and 16 move.
Rises while reversing the direction of rotation of the drum in order to rotate it in the direction of arrow F1, then the knives 14 and 1
As they descend, they raise the knives 13 and 15.

FIG. 2 completely shows the location of the two belts 17 on each side of a plurality of rows of a plurality of units 5. It can be seen that the pulleys are cantilevered to the corresponding flanges.

It is noted that the knives 13, 14, 15 and 16 are eventually made in two parts which are assembled together by bolts 25 which strongly tighten the belts. Moreover, at least one of the bolts 25 is provided to penetrate the two parts of the knife as well as the corresponding belt. Therefore, the knives 13, 14, 15 and 16 are fixed to the respective traction rope sides W, X, Y and Z.

In this way, lightweight, and thus inertia,
Also, a multi-hook drive mechanism for the loom shed forming apparatus at very low manufacturing costs is created, thus creating a ribbon and marking a tape ｛or a lisiere｝ etc.
It goes without saying that the invention is applicable to a limited number of hook shed forming devices such as those used for such applications.

Furthermore, the above description has been given by way of example only, and the present invention is not limited to the above-described structure, and any other mechanism similar to the present invention can be applied.

[0020]

As described above, according to the present invention, the hook driving mechanism of the shed forming apparatus can withstand a high speed with a lightweight, low inertia, simple structure and extremely low manufacturing cost.

[Brief description of the drawings]

1 is a cross-sectional view of the shed forming apparatus according to the present invention, taken along line I-II of FIG. 2;

FIG. 2 is a sectional view taken along the line II-II of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2, 3 Lateral flange 4 Small bar 5 Unit 5a-5c Row 6 Shaped material 7, 8 Movable hook 9 Traction rope 10 Combination pulley 11 Partition wall 12 Arcade 13, 14, 15, 16 Knife 17 Traction member 18 Drum 19 Tightening Part 20-24 Guide pulley

Claims (3)

(57) [Scope of request for utility model registration] 1. A hook drive mechanism for a shed forming apparatus for a loom, comprising a plurality of rows of hooks reciprocating for raising and lowering a warp passing through a loom, wherein each of two parallel pulling members (17) is provided with a plurality of pulling members. It has a number of knives (13-16) with fixed ends, said two traction members (17) being driven by at least one drum (18) which is driven alternately, and opposed parallel traction ropes (18). The traction members are guided in a zigzag manner by a number of pulleys (20-23) so that a number of the knives are fixed to each of the traction ropes (W-Z) so as to obtain a large number of the wings (W-Z). A hook driving mechanism. 2. Each of the knives (13-16) is made in two parts which are assembled together to be fixed to the parallel traction rope side (W, Y, Z) of each traction member (17). The hook drive mechanism according to claim 1, wherein 3. The hook drive mechanism according to claim 1, wherein one of the guide pulleys constitutes a puller for the corresponding side belt.