RU2363782C2 - Shedding mechanism, three-position dobby frame and loom, outfitted by this carriage - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to textile mechanical engineering and relates to shedding mechanism, three-position dobby frame, and also to loom, outfitted by such dobby frame. Mechanism contains two installed one over other electromagnet, and also two pairs of revolute arms of keeping, located in pairs and outfitted by stop of mobile hook, belonging to the pair of hooks. In one pair the first mobile hook contains body, provided for bearing on knife, and also flexible plate interacting to keeping lever, when the second hook contains body, provided for bearing on body of the first hook, and also flexible plate, interacting to other keeping lever of the same pair of hooks. Each plate is fixed on corresponding body with ability of inclination and stop of each lever is implemented from the lever side which is opposite to corresponding magnet.

EFFECT: invention provides reliability and simplicity in usage of loom of jacquard type, outfitted by such three-position dobby frame.

10 cl, 4 dwg

Description

The invention relates to a shedding mechanism, a three-position heave lifting carriage, and also to a weaving machine equipped with such a heave lifting carriage.

A loom containing a bobbin carriage capable of producing three positions of warp threads is mainly used to make special fabrics, in particular velvet or cloth.

From the patent application EP-A-0839937, a three-position shaft-lifting carriage is known in which movable hooks are provided for pairwise movement of the carriage knives, with one hook of each pair resting directly on the second hook of this pair. The hooks are combined in pairs by rope elements and connected to several pulleys, which can be moved apart from each other in different ways, depending on the position of these four hooks.

It is also known from EP-A-0899367 that it is possible to provide two pairs of pivoting levers located on both sides of two electromagnets located one above the other in the selection device for a three-position shaft lifting carriage, while the levers of each pair can be controlled by one of the electromagnets and equipped with each movable hook stopper belonging to a pair of hooks superimposed on each other and able to move together under the action of a knife. This device is effective in operation, but relatively difficult to manufacture, in the case when one of the rotary levers extends on two sides of the axis of rotation with an improved shape, which leads to an increase in cost. In addition, the mass of fiber can accumulate in the area provided between each lever and the adjacent part of the electromagnet, which serves to control its rotation, which over time can lead to selection errors, which lead to the formation of “errors” on the fabric or cloth during manufacturing .

In this known device, two movable hooks reach a dead center point of their path, between the lever stops, and are made of plastic, and have a variable width depending on manufacturing tolerances, and differences in the width of the movable hooks can lead to incorrect positioning of one or the other rotary holding levers , which again can cause "errors" on the fabric or cloth during weaving.

The objective of the present invention is to eliminate the disadvantages of the above devices due to the mechanism of shedding, intended for use in a three-position remizoobrazny carriage, and more simple to manufacture and use and more reliable compared to systems known from the prior art.

The problem is solved in that in the mechanism of yaw formation for a three-position remodel carriage of a Jacquard-type loom, containing at least two electromagnets located one above the other, which can be selectively engaged, as well as two pairs of rotary holding levers, moreover, holding levers of one pair located on one side of the electromagnets and each equipped with metal fittings that can interact with one of the electromagnets and the stopper to hold the movable hook, etc. an appropriate pair of hooks capable of moving together under the action of the knife, according to the invention, inside the same movable pair of hooks, the first hook contains a body designed to support the knife, as well as a flexible plate designed to interact with one of the holding levers, while the second hook contains a body designed to support the body of the first hook, as well as a flexible plate designed to interact with another lever holding the same pair of levers, each plate being fixed on the corresponding body can be deflected, the stopper of each holding lever is made on the side of the lever opposite to the corresponding electromagnet, the stoppers of the levers of one pair are displaced relative to each other simultaneously in a direction parallel to the direction of movement of the corresponding movable hooks, and in a direction perpendicular to this direction of movement, and parts of flexible plates designed to interact with these stoppers have exactly the same offset between each other in the two aforementioned directions Barrier-when the body of the second movable hook rests on the first body.

Thanks to the invention, a flexible plate mounted on the body of each movable hook is designed to interact with one of the levers holding a pair of levers, its geometry is well defined, since the tolerances on the manufacture of the plate can be very accurate. On the other hand, the body of each hook, which is mainly made of synthetic material, can be strong, since it has a relatively large mass. The flexibility of the plate is used to ensure its deflection opposite the body of each hook, which allows it to effectively engage with the corresponding holding lever during the alignment of the swing arms or to hold the hook in the vicinity of the upper position of its path. Since the stoppers of two levers of the same pair are directed in the same direction, the alignment force transmitted by the flexible plate to the levers is completely comparable between the two levers and, on the contrary, the holding force transmitted by the stopper of each lever is completely comparable between the two hooks of one pair. In addition, the electromagnets, their respective control devices and corresponding levers can be completely identical, which facilitates the development of the machine, improves reliability, reduces cost and allows you to get a more compact mechanism. This is important in the case when the lifting carriage can have more than 10,000 such mechanisms.

In accordance with advantageous, but not mandatory aspects of the invention, such a mechanism may have one or more distinguishing features, taken in all technically possible combinations:

- The plates of one pair of hooks are able to abut against the holding levers from the side of their respective clamps and press these levers to the electromagnets during the alignment operation.

- Each holding lever rotates around an axis that is stationary relative to the mechanism body, and stretches relative to this axis, mainly in the direction perpendicular to this axis, and only on one side of it. The retention levers are more compact and more durable than the levers from EP-A-0899367.

- Two levers for holding one pair are completely identical, which leads to savings in manufacturing and facilitates the management of a warehouse of spare parts.

- Each holding lever is equipped with at least one deflector capable of isolating the variable volume chamber from the outside depending on its angular position. This eliminates the accumulation of fiber in the mass in such a chamber and limits the risks of disruption.

- The body of the first hook is equipped, on the first hand, with a stopper that can abut against the corresponding knife, and, on the second side, opposite the first side, with a protrusion suitable for supporting part of the body of the second hook. The transfer of force from the first to the second hook of one pair, therefore, takes place without tension of the flexible plates mounted on each of these bodies, and the mechanical characteristics of these plates can be optimized in accordance with their respective functions of aligning and / or securing the hooks on the holding levers . In this case, the stopper and protrusion on the body of the first hook extend mainly from two sides of the flexible plate fixed on this body.

- The flexible plates of the movable hooks of one pair have different widths and are directed so that they can bend under the same conditions, which allows you to apply exactly the same force to the corresponding levers during alignment.

The invention also relates to a three-position remodel carriage of a Jacquard loom, which comprises at least one selection mechanism, such as described above. Such a carriage is more reliable and more economical than carriages known in the art.

Finally, the invention relates to a loom equipped with a lifting carriage, such as the one mentioned above. Such a machine is more reliable and easier to use than machines known from the prior art.

The invention is further illustrated by the description of an embodiment of a loom, a lifting carriage and a selection mechanism corresponding to its principle, given solely as an example with reference to the attached figures, including:

Figure 1 depicts a main longitudinal section of part of the shedding mechanism according to the invention in a first configuration;

1A is a detailed view of the interaction zone between the movable hook and the holding lever on a larger scale and in the direction of arrow A of FIG. 1;

Figure 2 is a half section corresponding to the right side of figure 1, while the mechanism is in the second configuration; and

Figure 3 is a half section similar to Figure 2, while the mechanism is in a third configuration.

The mechanism of yawning, shown in Fig.1-3, is intended for integration into a three-position shaft lifting carriage mounted on a weaving machine for the manufacture of cloth. It allows you to control the position of the batan or hook of the lower end of the arcade, to which one or more heatsinks are suspended or suspended. Part of the mechanism shown in the drawings is connected to several pulleys installed in accordance with the technical instructions from EP-A-0839937, the relative position of the pulleys allows you to control the height of the butt or hook of the aforementioned end. To control the position of these pulleys, two of which are schematically shown only in Fig. 1 with the designations P ₁ and P ₂ , two rope elements 1 and 2 are made in the form of cords connecting two external movable hooks 11 and 11 'and two internal movable hooks, respectively 12 and 12 '. Hooks 11 and 12, on the one hand, and 11 'and 12', on the other hand, are provided to move together under the action of the knife 13 or 13 ', the inner hook of each pair of hooks resting in this case on an external hook of the same pairs, which corresponds to the technical solution according to EP-0839937.

The mechanism M also contains two electromagnets 4 and 5, mounted parallel to the direction of the strictly vertical axis ZZ 'in figure 1 and which corresponds to the direction of movement of the pulleys P ₁ and P ₂ . Electromagnets 4 and 5 can be selectively activated by a control module not shown.

On two sides of the electromagnets 4 and 5 are two pairs of levers 21 and 21 'and, respectively, 22 and 22'. The levers 21, 21 ', 22 and 22' are structurally identical and each of them is mounted with the possibility of rotation around the axis 211, 211 ', 221 and 221', respectively, whose geometric axis is X ₂₁₁ , X _{211 '} , X ₂₂₁ , X _221' motionless relative to the housing 6 of the mechanism, motionless relative to the design of the machine. The axes X ₂₁₁ and the axes equivalent to them are generally perpendicular to the axis Z-Z '. The lever 21 comprises an upper eyelet 212, in which a hole is made for the passage of the axis 211 and extends mainly below the axis 211 in FIG. 1, that is, in fact, toward the bottom in a direction generally parallel to the Z-Z 'axis. The lever 21 contains a metal reinforcement 213, located exactly opposite the electromagnet 4 and which stretches in a direction mainly parallel to the axis ZZ 'and perpendicular to the axis X ₂₁₁ . The lever 21 is equipped with a stopper 214, on which a part of the movable hook 11 can be attached, thus, as will be shown below.

The lever 21 also carries a deflector 215, which allows you to isolate the variable volume chamber C ₂₁ from the outside, depending on the angular position of the lever 21 around the axis X ₂₁₁ . Indeed, the lever 21 is mounted to rotate around the axis X ₂₁₁ in this way, as follows from the double arrow F ₁ , the camera C _{21 is} limited by two contact polar surfaces provided respectively on the lever 21 and on the electromagnet 4. The angular position of the lever 21 can be controlled by an electromagnet 4 and a compression spring 14, which is inserted between the lever 21 and the central part 6A of the housing 6. The spring 14 acts on the lever 21 with an elastic force E ₄ , which tends to divert the stopper 214 from the axis Z-Z '.

The levers 21 ', 22 and 22' are structurally identical to the lever 21 and each of them is equipped with metal fittings 213 ', 223 and 223', a stopper 214 ', 224 and 224' and a baffle 215 ', 225 and 225' and are exposed to a spring 14 ' , 15 and 15 '.

The levers 21 ', 22 and 22' also extend each in a direction substantially parallel to the axis ZZ 'with respect to the axes X _211' , X ₂₂₁ and X _{221 '} . These levers are mounted to rotate around their respective axes, in the direction of the arrows F ' ₁ , F ₂ and F' ₂ and their position can be controlled by electromagnets 4 or 5 and springs 14 and equivalent to them.

The axes X ₂₁₁ and X ₂₂₁ are offset parallel to the axis ZZ 'by a distance d ₁ exceeding the length of the lever 21. These axes are also offset in the direction Y-Y' perpendicular to the axis ZZ 'and the axes X ₂₁₁ and X ₂₂₁ , by a distance d ₂ , the axis X _{211 is} more distant from the axis Z-Z 'than the axis X ₂₂₁ . Since the levers 21 and 22 are identical, the stoppers 214 and 224 are also offset by distances d ₁ and d ₂ simultaneously parallel to the axis ZZ 'and perpendicular to this axis.

The fact that the holding levers extend only on one side of their respective rotation axes makes it possible to easily achieve their good geometry, which largely determines the reliability of the mechanism M. In particular, the inertia of rotation of these levers is relatively small, which allows the use of return springs 14 and equivalent to them, producing a return force E ₄ or an equivalent force of lower intensity, and therefore, the electromagnets 4 and 5 are relatively less powerful and therefore more compact.

The hook 11 is two-part and contains a body 111 of synthetic material, which is relatively massive and into which the end 112 of the flexible metal plate 113 is poured, designed to interact with the lever 21. This two-part structure may be close to the structure described in EP-A-1413657 for two-position remodeling carriages. However, the mechanism of the present invention is significantly different from the prior art in that its particular configuration is adapted for a three-position remodel carriage.

The plate 113 is equipped in the vicinity of its end 114, which is farthest from the body 111, with a hole 115 for receiving a stopper 214 of the lever 21. Thus, as shown on the right side of FIG. 1, the hook 11 can be held in position in the vicinity of the top dead center of its path by the lever 21.

In the same way, the hook 12 comprises a body 121 made of synthetic material, in which the lower end 122 of the flexible metal plate 123 is poured, designed to interact with the lever 22. In the vicinity of its upper edge 124, the plate is equipped with an opening for receiving the stopper 224 of the lever 22.

The plate 113 is noticeably longer than the plate 123, which corresponds to the fact that in the holding position of the movable hooks 11 and 12 in the vicinity of the top dead center of their path, the distance between the body 111 and the stopper 214 significantly exceeds the distance between the body 121 and the stopper 224.

The plates 113 and 123, due to their flexibility, are capable of angular deflection relative to their fixing zone on bodies 111 and 121, as shown by arrows F ₃ .

The plates 113 and 123 are each guided along a guide 116 or 126 formed by the housing 6 and which extends to the vicinity of the lever 21 or 22. At the same distance d ₆ from the hooks 214 and 224, the guides 116 and 126 expand, moving away from the axis ZZ 'and returning to stoppers to allow the plates 113 and 123 to bend at the same height, in the vicinity of their upper ends, respectively 114 and 124. Thus, even if the plates 113 and 123 have different lengths, they are bent under similar conditions, which means that the alignment forces transmitted on levers 21 and 22, completely id identical.

When the hook 12 rests on the hook 11, the ends 113 and 124 of the plates 113 and 123 and, in particular, their holes 115 and their equivalents have the same spatial displacement as the stoppers 214 and 224. In other words, the ends 214 and 224 are offset by a distance d ₁ parallel to ZZ 'and a distance d ₂ parallel to Y-Y', which allows them to simultaneously interact with hooks 213 and 224.

The structure of the movable hooks 11 'and 12', respectively, is identical to the structure of the hooks 11 and 12.

The stops 214 and 224 are guided relative to the main body of the levers 21 and 22 opposite the magnets 4 and 5. In the same way, the stops 214 'and 224' are directed opposite the electromagnets. Thus, the plates 113, 123, in particular the corresponding plates 113 'and 123' of the movable hooks 11 'and 12', are in contact with the levers 21, 22, 21 'and 22' from the outside opposite the electromagnets 4 and 5, which is especially advantageous during the alignment of the holding levers, that is, in the position shown on the left side of FIG. 1, when the knife 13 'moves the hook 11' so that the upper ends 114 'and 124' of the plates 113 'and 123' move the levers 21 'and 22' in the direction electromagnets 4 and 5. If one or the other of electromagnets 4 or 5 is activated by the control module, the lever or levers 21 'and 22' effect They are surely kept in a completely pressed state against the electromagnet or electromagnets, which allows the hook 11 'and, if necessary, the hook 12' to lower, leaning on the knife 13 'when it starts its downward stroke.

Such a configuration is shown on the right side of FIG. 2 and corresponds to lowering the knife 13 after the alignment has been carried out, as shown on the left side of FIG. 1. In this case, the electromagnet 4 was activated, while the electromagnet 5 was not activated so that the stopper 224 of the lever 22, which is moved away by the spring 15, held in some position the plate 123 and, therefore, the node of the hook 12, while, taking into account the activation of electromagnet 4, the stopper 214 of the lever 21 is retracted from the path of the plate 113, which allows the hook 11 to lower again, resting on the knife 13.

Like the plates 113 and 123, the plates 113 'and 123' are guided along the tracks, ensuring equal alignment forces acting on the levers 21 'and 22'.

In the configuration of FIG. 3, the electromagnets 4 and 5 were activated in such a way that the stoppers 214 and 224 of the levers 21 and 22 were retracted from the lowering paths of the plates 113 and 123 after alignment. In this case, the hooks 11 and 12 are again lowered with the knife 13, resting on it.

The body 111 comprises a stopper 111A designed to support the knife 13 during movement of the hook 11, as well as a protrusion 111B located on the side of the body 111 opposite the stopper 111A relative to the plate 113; this protrusion 111B is intended to support the protrusion 121B formed by the body 121, in particular in the configurations of FIGS. 1 and 3. Thus, the interaction between the bodies 111 and 121 of the hooks 11 and 12 does not affect the parts of these hooks used to hold them in the upper position as in the case of materials known from EP-A-0839937 and EP-A-0899367.

The lifting carriage according to the invention includes several mechanisms, such as the mechanism described above and shown in the drawings; in practice, this is a mechanism of heaps or heaps of groups, the position of which should be controllable.

A loom according to the invention and equipped with a lifting carriage, such as the one described above, can be used for weaving special fabrics, in particular velvet or cloth. It is more economical when buying and operating and has low risks of errors.

The invention was presented with two electromagnets 4 and 5 located between the levers 21, 21 ', 22 and 22'. It also applies when the number of electromagnets is four, one electromagnet for each lever.

In addition, the blades 113, 113 ', 123 and 123' are not necessarily metal. They can be made of synthetic material having mechanical characteristics suitable for their functions, for example, carbon fibers or plastic with the addition of reinforcing threads.

Claims (10)

1. The yawing mechanism for the three-position remodel carriage of a Jacquard-type loom, comprising at least two electromagnets installed with the possibility of selective activation, as well as two pairs of rotary holding levers, and the holding levers of one pair are located on one side of the aforementioned electromagnets and are equipped each with metal fittings capable of interacting with one of the aforementioned electromagnets and a stopper to hold a movable hook belonging to a pair of hooks made with the ability to move together under the action of a knife, characterized in that inside one pair of movable hooks (11, 12, 11 ', 12'), the first hook (11, 11 ') contains a body (111) designed to support the aforementioned a knife (13, 13 '), as well as a flexible plate (113, 113'), designed to interact with the holding lever (21, 21 '), and the second hook (12, 12') contains a body (121), designed to support on the body of the aforementioned first hook, as well as a flexible plate (123, 123 '), designed to interact with another lever (22, 22') holding I have the same pair of levers, each plate is mounted on the corresponding body with the possibility of deviation (F ₃ ), the stopper (214, 214 ', 224, 224') of each holding lever (21, 21 ', 22, 22') is made from the side indicated the lever opposite to the corresponding electromagnet (4, 5), the lever stops of one lever pair are displaced (d ₁ , d ₂ ), one in relation to the other, simultaneously in the direction (Z-Z ') parallel to the direction of movement of the corresponding movable hooks and in the direction (Y -Y ') perpendicular to the aforementioned direction of movement, and parts (114, 115, 124) FIR plates (113, 123, 123 ', 123') intended to interact with the aforementioned stoppers are exactly the same offset (d _1, d ₂₎ between them in the above directions, when the body of the second movable hook (12, 12 ') leans on the body of the first movable hook (11, 11 '). 2. The mechanism according to claim 1, characterized in that the aforementioned plates (113, 123, 113 ', 123') of one pair of hooks (11, 12, 11 ', 12') are made with the possibility of support on the aforementioned holding levers (21, 21 ', 22, 22') from the side of their respective stops (214, 214 ', 224, 224') and pressing the aforementioned levers against the aforementioned electromagnets. 3. The mechanism according to one of claim 1 or 2, characterized in that each holding lever (21, 21 ', 22, 22') rotates around an axis (X ₂₁ , X _{21 '} , X ₂₂ , X _22' ), stationary relative to the housing (6) of the aforementioned mechanism (M) and stretches, with respect to the aforementioned axis, mainly in the direction (Z-Z ') perpendicular to the aforementioned axis and only on one side of it. 4. The mechanism according to one of claim 1 or 2, characterized in that the two holding levers (21, 22, 21 ', 22') of the same pair are identical. 5. The mechanism according to one of claim 1 or 2, characterized in that each retention lever (21, 21 ', 22, 22') is equipped with at least one deflector (215, 215 ', 225, 225'), able to isolate from the outside the chamber (C ₂₁ ) of the variable depending on the angular position (F ₁ , F _{1 '} , F ₂ , F _2' ) of the lever. 6. The mechanism according to one of claim 1 or 2, characterized in that the body (111) of the aforementioned first hook (11, 11 ') is equipped, on the first side, with a stopper (111A) capable of resting on the aforementioned knife (13, 13') and on the second side opposite the first side, the protrusion (111B), suitable for supporting part (121B) of the body (121) of the second hook (12, 12 '). 7. The mechanism according to claim 6, characterized in that the stopper (111A) and the protrusion (111B) of the body (111) of the first hook (11, 11 ') stretches on both sides of the flexible plate (113, 113') mounted on the aforementioned the body. 8. The mechanism according to one of claim 1 or 2, characterized in that the flexible plates (113, 123, 113 ', 123') of the movable hooks (11, 12, 11 ', 12') of one pair of hooks have different lengths and are guided (116, 126) so that (d ₆ ) that they can bend (F ₃ ) under the same conditions. 9. Three-position remoising mechanism of the Jacquard machine, containing at least one selection mechanism (M) according to one of the preceding paragraphs. 10. A Jacquard-type loom equipped with a lifter carriage according to claim 9.

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