JPH0638125Y2 - Shedding device in loom - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a negative opening device for vertically moving a heddle frame of a loom using an opening rope.

2. Description of the Related Art In a negative opening device of a loom, a nylon-coated steel twist wire is generally used as an opening rope for transmitting the power of an opening drive mechanism and the tensile force of a spring to a heddle frame.
This steel wire connects the jack lever to which the spring is attached and the heald frame, and also connects the opening drive mechanism and the heald frame with the position regulation by the guide roller.

The steel wire is always subjected to a pulling force in one direction by the spring and a pulling force in the opposite direction by the opening drive mechanism. Further, the steel wire is subjected to inertial force and warp tension caused by the vertical movement of the heddle frame, so that the steel wire gradually extends during use. In order to solve such problems, in the past
A circular pipe material was installed in the middle of the rope like the invention of -9597 to shorten the length of the rope and minimize the generated elongation.
Like the invention of -203277, a turnbuckle for adjusting the length of the extended rope is installed in the middle of the rope.

Problems to be Solved by the Invention As described above, the tensile force from the opening drive mechanism and the spring, the inertial force of the heddle frame that moves up and down, and the tension of the warp opened by the heddle frame are factors that cause the elongation of the rope. However, there are other factors that cause elongation. In other words, since the position of the rope is regulated by the guide roller, the bending force generated when the guide roller goes around the guide roller or the large inertial force of the rope itself that works due to the high-speed reciprocating motion of the loom because the steel rope is heavy. .

The elongation of the rope caused by these causes a serious influence on the weft inserting mechanism. That is, the elongation of the rope displaces the height of the heddle frame, so that, for example, in an air jet loom, the opened warp blocks the weft guide passage of the weft guide member, causing a weft insertion error.
The above-mentioned conventional device reduces the elongation to a small amount, but it still affects the height of the heddle frame, and it is necessary to frequently adjust the height position of the heddle frame even when a turnbuckle is installed. Therefore, there was a problem in maintenance management of the device. Further, these elongations are currently being developed into a major problem of promoting reduction of rope life.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention uses a carbon fiber or an aramid fiber as a core material of an opening drive mechanism and an opening rope for transmitting a pulling force of a spring to a heddle frame of a loom. It was formed, and the rope surface was coated with nylon resin or the like.

Action of the Invention That is, since carbon fiber and aramid fiber have high tensile strength and are highly elastic fibers, the rope made of these fiber materials is far superior in strength to conventional steel ropes. It is very strong in bending and bending and has almost no elongation beyond the elastic range. Moreover, since it is lightweight, the influence of its own weight can be ignored, and there is no concern about stretching due to the inertial force of the rope itself. Therefore, no displacement appears in the height of the heddle frame, and the risk that the opened warp yarns prevent the weft yarn from flying is extremely low.

Since the position of the opening rope is regulated by the guide roller, frictional resistance is applied to the contact surface with the guide roller when the rope reciprocates. Since the open rope of the present invention is fibrous as described above, each fiber is thin and easily damaged by friction or the like. The rope surface coating formed of nylon resin or the like prevents damage to those fibrous materials.

Embodiment An embodiment in which the present invention is further embodied will be described with reference to the drawings. First, the shape of the opening rope in the present invention is shown in FIG. The core material of the opening ropes 11 and 12 is formed of aramid fiber 25, and the surface thereof is coated with nylon resin 26.
A cross section taken along the line AA in the figure is shown in FIG. An outline of an opening device to which the opening ropes 11 and 12 configured as described above are applied is shown in FIG. Jack levers 9 and 10 are swingably supported by supporting pins 7 and 8 on the shedding motion brackets 1 and 2, and spring hangers 5 and 6 are hooked on the jack levers 9 and 10. The spring hangers 5 and 6 are biased by springs 3 and 4, and the other ends of the springs 3 and 4 are fixed to support bases 1a and 2a protruding from the shedding motion brackets 1 and 2. The above-mentioned opening ropes 11 and 12 of the present invention are attached to the jack levers 9 and 10 as shown in FIG. In other words, the epoxy resin 27a is applied to the tip of the opening rope 11, (12) and cured, and the tip fitting 11a,
This tip fitting 11a, (12a) is crimped to (12a)
Is attached to the jack levers 9 and (10) by a lock nut 30a. Intermediate fittings 13 and 14 are attached to the opening ropes 11 and 12 as shown in FIG. Narrow groove portions 13a, (14a) are formed on the intermediate fittings 13, (14), and the thin groove portions (not shown) formed on the heddle frame 15 are formed therein.
Is attached, and the stopper 28, the bolt 29, and the lock nut 30b
The intermediate metal fittings 13 and 14 and the heddle frame 15 are fastened by. Further, through holes are formed in the intermediate fittings 13 and (14), and the opening ropes 11 and (12) penetrate the opening fittings, and the epoxy resin 27b is provided at both ends and inside of the intermediate fittings 13 and (14).
The opening rope 11, (12) and the intermediate fitting 13, (1
4) is integrally formed. The opening rope 11 passing through the intermediate metal fitting 13 orbits the guide roller 16, is hooked by the rope hooker 20 along the way, and further orbits the guide roller 17 to reach the turnbuckle 19. On the other hand, the opening rope 12 passing through the intermediate metal fitting 14 goes around the guide roller 18 and is attached to the turnbuckle 19. As shown in FIG. 6, the opening ropes 11 and 12 and the turnbuckle 19 are the same as the above-described method of attaching the jack levers 9 and 10, and the opening ropes 11 and
Epoxy resin 27c is applied to the tip of (12) and caulked to tip fittings 11b and (12b).
b, (12b) turnbuckle 19 with lock nut 30c
Is attached to. The rope hooker 20 is hooked on a cam lever 21, and the cam lever 21 is a support pin.
It is rocked by a cam 24 supported by 22 and attached to a cam shaft 23 so as to be integrally rotatable.

The operation of the present embodiment configured as above will be described. The opening ropes 11 and 12 are always pulled upward by the springs 3 and 4 via the jack levers 9 and 10 and the spring hangers 5 and 6. Then, the cam lever 21 swinging by the rotation of the cam 24 in the opening drive mechanism pulls down the heald frame 15. That is, as shown in FIG. 3, when the cam lever 21 contacts with the shortest radius of the cam 24, the heald frame 15 is pulled up to the highest position by the springs 3 and 4, and conversely, the cam lever 21 contacts with the longest radius of the cam 24. In the case, the cam lever 21 pulls the opening rope 11, and the heald frame
15 is lowered to the lowest limit. The above operation is repeated by the rotation of the cam 24, but at that time, the opening rope 11,
12 is the pulling force from the springs 3 and 4 and the cam lever 21,
It receives the inertial force associated with the vertical movement of the heddle frame 15, the tension of the opened warp, and the bending force caused by the guide rollers 16, 17, and 18 being rotated. Also, the inertial force of the opening ropes 11 and 12 themselves cannot be overlooked.

However, as described above, the opening ropes 11 and 12 are not only lighter in weight than the conventional steel ropes but also far superior in strength, and can withstand these actions sufficiently. That is, since the weight is light, the inertial force of the opening ropes 11 and 12 itself is small, and because of the high strength and high elasticity, the ropes 11 and 12 are also strong in tensile force and bending force. Therefore, there is almost no elongation that occurs beyond the elastic region, and the height position adjustment of the heddle frame 15 is almost unnecessary. In other words, the influence on the warp shed amount is small, and in the case of a de-weaving loom, for example, the warp does not block the warp guide passage of the weft guide member and cause a weft insertion error. Forming the core material of the opening ropes 11 and 12 from the aramid fiber 25 has the above-described excellent effects.
The same effect can be obtained when carbon fiber is applied instead of.

However, there are two problems in applying these fiber materials. One is that each fiber material is thin and easily damaged by friction, etc., and the other is that it is necessary to increase the rigidity when it is attached to a metal fitting. The former was solved by forming a film of nylon resin 26 on the rope surface. This coating prevents damage to each fiber material due to friction or the like and protects the rope surface, and therefore has the effect of reducing the elongation of the rope and extending the life of the rope. The latter was solved by applying epoxy resin 27 to the mounting portion with the metal fitting. Epoxy resin itself has a property of being firmly solidified, which can increase the rigidity of the rope, and can firmly attach the rope and the metal fitting.

Next, another embodiment different from the method of attaching the opening ropes 11 and 12 and the end fittings 11a, 12a, 11b and 12b shown in FIGS. 4 and 6 is shown in FIG. Since the jack levers 9 and 10 and the turnbuckle 19 are attached in the same manner as the opening ropes 11 and 12, only the turnbuckle 19 will be described here. As shown in FIG. 7, this method uses open ropes 11, (1
2) Tip part and tip fitting 11c are integrally molded with epoxy resin 27d and turnbuckle 1 with stop nut 30d.
Since it is attached to 9 and does not require caulking, the opening ropes 11 and (12) and the end fittings 11c and (12c) can be easily attached.

Effect of the Invention As described in detail above, the shedding device of the loom according to the present invention is
It solves all the conventional problems. Aramid fiber or carbon fiber is not only lightweight, but also high-strength and high-elasticity fiber.Therefore, the shedding device of a loom incorporating a rope with a core as a core material and a coating of resin on the surface is used In addition to reducing the displacement of the shed and greatly extending the life of the shed rope, the maintenance management of the device is facilitated, and because the shed rope is lightweight and the influence of its inertial force is small, it can sufficiently support the speedup of the loom. It has an excellent effect.

[Brief description of drawings]

1 to 6 show an embodiment embodying the present invention, and FIG. 1 is a longitudinal sectional view of an opening rope according to the present invention, and FIG.
The figure is a cross-sectional view of the opening rope, FIG. 3 is a front view showing the outline of the entire opening device, and FIG. 4 is an enlarged view of the main parts showing the method of attaching the opening rope and the tip fitting on the upper part of the jack lever. Is an enlarged view of the main parts showing how to attach the opening rope to the intermediate fitting, FIG. 6 is an enlarged view of the main portion showing how to install the opening rope and the end fitting of the turnbuckle, and FIG. 7 is shown in FIG. It is a principal part enlarged view which shows other Examples of the attachment method with the front metal fitting of a buckle. Springs 3, 4, jack levers 9, 10, opening rope 1
1, 12, heddle frame 15, cam lever 21, support pin 22, cam shaft 23, cam 24, aramid fiber 25, nylon resin 26.

Claims (1)

[Scope of utility model registration request] 1. In a shedding device of a loom, in which a heald frame urged in one direction by a spring attached to a jack lever performs shedding motion by an shedding drive mechanism, the power of the shedding drive mechanism and a pulling force by the spring are provided. An opening device characterized in that a core material of an opening rope that conducts to a heddle frame is formed of carbon fiber or aramid fiber, and the surface of the rope is coated with a resin or the like.