JPS5932620Y2 - Strain rate uniform structure of warp threads in shedding device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a warp strain rate uniform structure in a tappet type shedding device, and its purpose is to reduce the warp strain rate difference proportionally divided by the operation of the belt frame. The object of the present invention is to provide a shedding device suitable for extremely small shuttleless looms.

As is well known, the conventional tappet type opening device has a button.
As shown in FIG.
By raising and lowering the mating belt frames 5a and 6a, rows are formed by opening and dividing the floating threads and washed rice in proportion, but in this case, the floating threads and washed rice are set so that they are flush because it is necessary to smoothly move the shuttlecock. Was.

However, when such a configuration is adopted, as is clear from FIG. There is an unavoidable difference between the strain rate of the warp yarns, which causes unfavorable effects such as poor shedding, warp yarn breakage, and deterioration of fabric feel.

In particular, high-speed looms, such as the recent jet loom type, operate at 3 to 4 times the rotation speed of right-handed looms, so there is a serious need to eliminate the warp strain rate difference mentioned above. It's starting to look like this.

For these reasons, attempts have been made to narrow the spacing between each heald frame, or to set the momentum of each heald frame in advance so that the strain rate applied to the warp threads is constant. The former method has its own technical limitations, and the latter method has the disadvantage that the device itself becomes extremely complicated, so neither method is satisfactory.

By the way, in a shuttleless loom such as a jet loom type, the weft is located at approximately the center of the warp group W, where the weft is divided into upper and lower openings (
Since the loom flies accurately through the shed, it is not necessarily necessary to align the floating threads and washed rice in the shed flush, as is the case with right-handed looms.

The present invention was developed by focusing on the relationship between the difference in shedding amount and the warp strain rate as a key point in equalizing the warp strain rate in the shedding device of a shuttleless loom. A joiner is used to connect adjacent and opposite mating belt frames to each other.
This relates to a tappet-type opening device that is configured so that the upper and lower limit points of the travel level of each mail are aligned flush on two height planes by connecting these with the swinging of the trolley. be.

That is, the present invention will be explained based on the illustrated embodiment.The belt frame is arranged along the warp direction between the cloth opening A and the tension roll B, and the odd row belt frame 3 and 4 and the linked belt frame 5°6 move up and down relative to each other, and each mail m1 Tm2 of the odd and linked belt frame concerned moves up and down.
Tm3 The warp group W inserted through Tm4 is floating thread W1
In the shedding device that forms a shed by dividing the openings into the washed rice W2, the lower sides of oppositely adjacent odd-row belt frames 3 and 4 and the lower sides of oppositely adjacent interlocking belt frames 5 and 6 are used for odd-row use. The joiners 7'J, - and the joining joiner 8 are connected to each other at regular intervals, and the odd and joining joiners 7.8 are connected to the trailers 1 and 2 via connecting rods 9 and 10, respectively. Each mail m of the odd row/coupling belt frames 3, 4, 5, 6, 1m2 1m3
Tm4 is characterized in that it is positioned so that the upper limit translational and lower limit points of its travel level are flush with each other on the high and low 2,000 planes h r r.

In view of the above, it is assumed that the trolleys 1 and 2 are alternately swung up and down by well-known tappets (not shown).

In the above, "odd row belt frames" 3 and 4 mean the belt frames located at odd numbers when viewed from the weave A side, and "row belt frames 5.6" refer to the belt frames located at odd numbers from the weave A side. Refers to the belt frame located at an even number when viewed from above.

Mail rn1 trn2 Tm through which the warp group W is inserted
35rn4 is located at an intermediate portion of the belt frames 3, 4, 5, and 6 in the illustrated example.

A joiner γ that connects the lower sides of oppositely adjacent odd-row belt frames 3 and 4, and a joiner γ that connects the lower sides of oppositely adjacent odd-row belt frames 5 and 6;
The joiner 8 that connects the joiner 8 has a bifurcated upper part, and the belt frames are connected and fixed to the upper end of the joiner 8, and the lower central part of the joiner 8 is pivotally connected to the connecting rods 9 and 10. .

The lower ends of the connecting rods 9 and 10 are further pivotally connected to the movable ends of the trays 1 and 2.

Therefore, when the trailers 1 and 2 are operated by driving tappets (not shown) in the above-mentioned stealing, the odd row heald frames 3 and 4 and the engagement belt frames 5 and 6 are moved up and down by the same amount via the connecting rods 9 and 10. and each email
nl, rn2, and m3Tm4 are aligned flush on the two high and low planes htr at the upper limit point and the lower limit point.

The opening device of the present invention has a structure generally as described above, but the present invention is by no means limited to the embodiment shown in the drawings. Therefore, if the shedding device is a shedding device that uses a tappet mechanism to swing the trailer and relatively move the odd row belt frame and the interlocking belt frame to open and distribute the warp thread groups, it can naturally be applied to belt frames with four or more belt frames. It is possible to do so.

As is clear from the above explanation, in the shedding device of the present invention, the movement levels of each mail of the odd row heald frame and the connected heald frame are simultaneously flush with the plane htr at their upper limit translation and lower limit points. , the shedding amount q when apportioning the shedding of the warp group W is the same for all the warps, and there is almost no difference in the strain rate experienced by the warps (see FIG. 4).

In addition, in the conventional device, it was necessary to align the threads of the floating thread W1 and washed rice W2, so the trolley 1, which swings up and down,
a, the fulcrum of 2a must be placed close to the cloth roll (not shown) directly below the weaving shed A, and the swinging angle of the trailer must be matched with the opening angle of the shed, and therefore the space is cramped. Moreover, even if there is a restriction on the amount of cloth that can be wrapped around the cloth roll, the shedding device of the present invention can be used easily.

Since it is not necessary to install the second fulcrum near the cloth wrapping roll, the amount of cloth wrapped is not restricted by the trays 1 and 2, and the degree of freedom in design is increased.

As described above, according to the shedding device to which the present invention is applied, the difference in strain rate of each warp thread at the time of shedding apportionment of warp thread groups, which was considered unavoidable in the conventional tappet type shedding device, can be equalized to almost completely 1. This makes it possible to greatly contribute to stabilizing the quality of woven fabrics and preventing troubles during weaving on high-speed rotating jet loom type shuttleless looms.
Moreover, since the structure is extremely simple, the manufacturing cost is low, and there are many advantages from both a practical and economic point of view.

[Brief explanation of the drawing]

Fig. 1 is a structural explanatory diagram of a conventionally well-known tappet type opening device;
2 is a schematic diagram for explaining the warp strain rate difference in the shedding device shown in FIG. It is a schematic diagram for explaining the strain rate difference of warp threads in a shedding device. 1.2...traitor, 3,4,5.6...odd row
Row 5 lead frame, 7, 8...Joiner, 9.10...
Connecting rod, A... weave, B... tension roll, W... warp group, Wl... float, W2...
...washed rice, m1-4...mail, h...high plane,
r...lower plane.

Claims (1)

[Claims for Utility Model Registration] The odd row belt frames 3, 4 and the engaged heald frame 5 are arranged along the warp direction between the cloth opening A and the tension roll B, and correspond to the up and down swing of the trailer 1.2.゜6 moves up and down relative to each mail ml em2 of the odd/coupled belt frame.
pm3 The warp group W inserted into ym4 is floating thread W1
In the shedding device that forms a shed by dividing the openings into the washed rice W2, the lower sides of oppositely adjacent odd row belt frames 3 and 4 and the lower sides of oppositely adjacent interlocking belt frames 5 and 6 are used for odd rows. The joiners 7 and the joining joiners 8 are connected to each other at regular intervals, and the odd and joining joiners 7.
8 to the trailer 1 via the connecting rods 9 and 10.
, 2, and each mail m 1 of the odd row/coupled belt frames 3, 4, 5.6. A uniform warp strain rate structure characterized in that m2 s rn3 g rn4 are positioned so that the upper and lower limit points of their travel levels are flush on r on two planes, high and low.