CN211897269U

CN211897269U - Tension self-adjusting let-off device for rapier loom

Info

Publication number: CN211897269U
Application number: CN201922476122.9U
Authority: CN
Inventors: 高俊礼
Original assignee: Taihe Lvyuan Filter Material Co ltd
Current assignee: Taihe Lvyuan Filter Material Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-10
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a rapier weaving machine technical field, concretely relates to tension self-adjusting let-off device for rapier weaving machine, which comprises a base and supporting legs, wherein the supporting legs are fixed at four corners of the lower surface of the base, first supports are symmetrically fixed on the upper surface of the base, a warp beam is arranged between the two first supports, the front end surface and the rear end surface of the warp beam are provided with connecting shafts, the connecting shafts are rotatably connected with the first supports through bearings, and the end parts of the connecting shafts, which pass through the first supports, are provided with brake wheels; the utility model discloses a rotation speed difference between warp beam and the drive roll arouses the tension change of warp, and the warp transmits tension for the pressure sensing roller, and the pressure sensing roller turns into electric signal transmission PLC with it, and PLC control servo motor is just reversing to make braking belt adjust the brake force size of braked wheel, changes the slew velocity of warp beam again to realized the tensile automatically regulated of warp, its tension regulating effect is obvious, and the practicality is strong.

Description

Tension self-adjusting let-off device for rapier loom

Technical Field

The utility model relates to a rapier weaving machine technical field, concretely relates to rapier weaving machine is with tension self-interacting let-off device.

Background

The rapier loom is one widely used shuttleless loom and consists of mainly frame, main driving system, shedding mechanism, weft inserting mechanism, beating-up mechanism, let-off mechanism, winding mechanism, weft feeding mechanism, selvage mechanism, automatic weft searching mechanism, weft selecting mechanism, lubricating system, control system, etc. When the rapier loom is in normal operation, warp yarns are unwound from a warp beam and are fed into a knitting system according to a certain let-off quantity for knitting by a knitting machine part, and the process is called let-off. The tension of the warp yarn can be changed at any time in the warp let-off process, the tension cannot be adjusted, the warp yarn can be broken if the tension is too high, and the warp yarn can be wound when the tension is too low, so that the control of the tension of the warp yarn in the warp let-off process of the rapier loom is a crucial step.

The utility model with the patent number of CN205529279U discloses a warp let-off mechanism of a rapier loom, which comprises a bracket, wherein a warp beam for releasing warp is connected on the bracket through a rotating rod in a rotating way, the end part of the rotating rod is in threaded connection with a fixed body, a pressing piece is connected on the rotating rod between the fixed body and the warp beam in a sliding way, the pressing piece extends to the outside of the warp beam and is connected with a fixed rod in a sliding way, and the fixed rod is fixedly connected with the bracket; the utility model discloses a through will compress tightly the piece and compress tightly on the warp beam, frictional resistance when the increase warp beam rotates to reach the effect of speed reduction regulation tension, but this utility model tension adjustment in-process needs artifical the regulation, will compress tightly moreover and press its frictional action on the warp beam, can make to compress tightly a surface wear and warp beam and heat up, lead to the life-span that the warp let-off in-process tension was adjusted loaded down with trivial details and was influenced warp let-off mechanism. Therefore, the invention provides a let-off device capable of realizing automatic tension adjustment, aiming at the defects of the existing let-off mechanism in the aspect of tension adjustment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a rapier weaving machine is with tension self-interacting let-off device has been designed to solve the unable automation of realizing tension regulation not enough of the let-off mechanism of current rapier weaving machine.

The utility model discloses a realize through following technical scheme:

a tension self-adjusting let-off device for a rapier loom comprises a base and supporting legs, wherein the supporting legs are fixed at four corners of the lower surface of the base, first supports are symmetrically fixed on the upper surface of the base, warp beams are arranged between the two first supports, connecting shafts are arranged on the front end surface and the rear end surface of each warp beam, the connecting shafts are rotatably connected with the first supports through bearings, brake wheels are arranged at the end parts of the connecting shafts, which penetrate through the first supports, fixed plates are connected on the bases on the left sides of the brake wheels, first springs are connected on the fixed plates, brake belts are connected at the right ends of the first springs, an adjusting box fixed on the base is arranged at the lower ends of the brake belts, a belt inlet is formed in the upper surface of the adjusting box, the brake belts in the adjusting box are connected with lifting blocks, and threaded holes are formed in the, a servo motor is fixed on the lower surface of the base right below the adjusting box, the end part of an output shaft of the servo motor, which extends into the adjusting box, is connected with a screw rod through a coupler, and external threads on the screw rod are matched with threaded holes;

the base on the right side of the first support is symmetrically fixed with second supports, a driving roller is arranged between the two second supports, the front end surface and the rear end surface of the driving roller are provided with rotating shafts, the rotating shafts are rotatably connected with the second supports through bearings, the end parts of the rotating shafts, which penetrate through the second supports, are provided with belt pulleys, a speed reducing motor is fixed on the base below the belt pulleys, an output shaft of the speed reducing motor is provided with a driving wheel, the driving wheel and the belt pulleys are driven through a triangular belt, rectangular upright columns are symmetrically arranged on the base between the warp beam and the driving roller, cavities are arranged inside the rectangular upright columns, the inner side surfaces of the rectangular upright columns are provided with strip-shaped sliding openings communicated with the cavities, the upper bottom surface and the lower bottom surface of each cavity are provided with pressure sensors, and the surfaces of the pressure sensors, the cavity is internally provided with a sliding block, the free end of the second spring is connected with the sliding block, the side face of the sliding block, which extends out of the strip-shaped sliding opening, is fixed with a bearing seat, the front bearing seat and the rear bearing seat are rotatably provided with pressure sensing rollers, and the upper surface of the base is provided with a PLC.

As the further improvement of above-mentioned scheme, the surface of second support is provided with the spout, spout side spiro union has the threaded rod that stretches into in the spout, the outer end of threaded rod is connected with the carousel, the inner of threaded rod is connected with the sliding block that can follow the spout and remove, the surface rotation of sliding block is provided with the tensioning regulating wheel, promotes the sliding block along the spout through rotating the threaded rod, adjusts the stability of V belt drive roll.

As a further improvement of the scheme, the circumferential side face of the driving roller is coated with a rubber skin layer, the outer surface of the rubber skin layer is provided with friction grains in an equal radian, the friction force between the rubber skin layer and the warp yarns is increased, and the slipping condition between the warp yarns and the driving roller is prevented from occurring.

As a further improvement of the scheme, a signal input end of the PLC is connected with the pressure sensor, a signal output end of the PLC is connected with the servo charge and the speed reducing motor, pressure borne by the pressure sensor is different through change of warp tension, the pressure is converted into an electric signal and transmitted to the PLC, and the PLC controls the positive and negative rotation of the servo motor to change the braking force of the belt brake wheel.

The working principle is as follows: the utility model discloses a warp is emitted to the warp beam, in the warp rethread drive roll realized constantly getting into the rapier weaving machine, when the drive roll rotational speed was too fast and the warp beam rotational speed was lower, the tension increase of warp applied an upward force to the pressure sensing roller, the pressure sensor of cavity upper surface received the pressure of spring and converted into the signal of telecommunication and is given PLC this moment, PLC control servo motor forward rotation, the elevator up-movement leads to the braking force of brake belt to the braked wheel to reduce, the rotational speed increase of warp beam makes the tension of warp reduce; when the tension of the warp is larger than a certain value, the PLC reduces the rotating speed of the speed reducing motor to achieve the effect of reducing the tension.

When the rotating speed of the driving roller is reduced, the warp beam still maintains a high rotating speed due to inertia, the tension borne by the warp yarn disappears at the moment, the force borne by the warp yarn disappears on the pressure sensing roller, the pressure sensing roller enables the pressure sensor on the lower surface of the cavity to bear the pressure due to the self gravity, the pressure sensor converts the pressure into an electric signal and outputs the electric signal to the PLC, the PLC controls the servo motor to rotate reversely at the moment, the lifting block moves downwards, the braking force of the braking belt to the braking wheel is increased, and the rotating speed of the warp beam is reduced to enable the tension of the warp yarn to rise.

Has the advantages that: compared with the existing let-off mechanism, the utility model has the advantages that the tension of the warp is changed due to the difference of the rotation speed between the warp beam and the drive roll, the tension is transmitted to the pressure sensing roll by the warp, the pressure sensing roll converts the tension into an electric signal to be transmitted to the PLC, then the PLC controls the servo motor to rotate positively and negatively so that the braking belt adjusts the braking force of the braking wheel, and then the rotation speed of the warp beam is changed, thereby realizing the automatic adjustment of the warp tension; the utility model discloses think about ingeniously, can realize the automatically regulated to warp beam on the warp tension size, the tension regulation effect is obvious, and the practicality is strong.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the three-dimensional structure of the present invention;

fig. 2 is a schematic structural view of a front view plane of the present invention;

fig. 3 is a schematic top plan view of the present invention;

FIG. 4 is a schematic view of the inner plane structure of the adjusting box of the present invention;

fig. 5 is a schematic view of the internal plane structure of the rectangular column of the present invention.

Wherein, 1-a base, 2-a support leg, 3-a first bracket, 4-a warp beam, 5-a connecting shaft, 6-a bearing, 7-a brake wheel, 8-a fixing plate, 9-a first spring, 10-a brake belt, 11-an adjusting box, 12-a servo motor, 13-a screw rod, 14-a second bracket, 15-a driving roller, 16-a rotating shaft, 17-a belt pulley, 18-a speed reducing motor, 19-a driving wheel, 20-a triangular belt, 21-a rectangular upright post, 22-a PLC, 23-a sliding chute, 24-a threaded rod, 25-a rotating disc, 26-a sliding block, 27-a tensioning adjusting wheel and 28-a friction line;

100-warp yarns;

110-belt inlet, 111-lifting block;

131-external threads;

210-cavity, 211-bar slide, 212-pressure sensor, 213-second spring, 214-slider, 215-bearing seat, 216-pressure sensing roller.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

As shown in figures 1-5, the tension self-adjusting let-off device for the rapier loom mainly comprises a base 1 and four legs 2, wherein the four legs 2 are fixed at four corners of the lower surface of the base 1. Two first supports 3 are symmetrically fixed on the upper surface of the base 1, a warp beam 4 is arranged between the two first supports 3, connecting shafts 5 are arranged on the front end face and the rear end face of the warp beam 4, bearings 6 are arranged on the first supports 3, and the warp beam 4 and the first supports 3 are rotatably connected through connection between the connecting shafts 5 and the bearings 6. A brake wheel 7 is arranged at the end part of the connecting shaft 5 passing through the first bracket 3, a fixing plate 8 is vertically fixed on the base 1 positioned at the left side of the brake wheel 7, a first spring 9 is connected on the fixed plate 8, the right end of the first spring 9 is connected with a brake belt 10, the braking belt 10 is wound around the circumferential surface of the braking wheel 7 to apply braking force, the lower end of the braking belt 10 is provided with an adjusting box 11 fixed on the base 1, the upper surface of the adjusting box 11 is provided with a belt inlet 110, the braking belt 10 positioned in the adjusting box 11 is connected with a lifting block 111, the lifting block 111 is provided with a threaded hole (not shown in the figure), a servo motor 12 is fixed on the lower surface of the base right below the adjusting box 11, the end part of an output shaft of the servo motor 12 extending into the adjusting box 11 is connected with a screw rod 13 through a coupler (not marked in the figure), and an external thread 131 of the screw rod 13 is matched with the threaded hole.

Two second supports 14 are symmetrically fixed on the base 1 on the right side of the first support 3, a driving roller 15 is arranged in the middle of the two second supports 14, a rubber skin layer wraps the side face of the circumference of the driving roller 15, and the outer surface of the rubber skin layer is provided with friction grains 28 in an equal radian mode to enhance the friction force between the rubber skin layer and the warp yarns. The front end surface and the rear end surface of the driving roller 15 are also connected with a rotating shaft 16, the rotating shaft 16 is also rotatably connected with the second support 3 through a bearing 6, the end part of the rotating shaft 16, which penetrates through the second support 14, is provided with a belt pulley 17, a speed reducing motor 18 is fixed on the base 1 right below the belt pulley 17, an output shaft of the speed reducing motor 18 is provided with a driving wheel 19, and the driving wheel 19 is connected with the belt pulley 17 through a triangular belt 20 for driving. The base 1 between the warp beam 4 and the driving roller 15 is symmetrically provided with two rectangular upright posts 21, cavities 210 are formed in the rectangular upright posts 21, the inner side faces of the rectangular upright posts 21 are provided with strip-shaped sliding openings 211 communicated with the cavities 210, the upper bottom face and the lower bottom face of each cavity 210 are provided with pressure sensors 212, the surfaces of the pressure sensors 212 are connected with second springs 213, a sliding block 214 is arranged in each cavity 210, the free end of each second spring 213 is connected with the corresponding sliding block 214, the side face, extending out of each strip-shaped sliding opening 211, of each sliding block is fixed with a bearing seat 215, pressure sensing rollers 216 are arranged on the two bearing seats 215 in the front and the back in a rotating mode, the height of each pressure sensing roller 216 is lower than that of the warp beam 4 and that of the driving roller 15, and meanwhile, the.

In addition, a sliding groove 23 is arranged on the outer surface of the second support 14, a threaded rod 24 extending into the sliding groove 23 is screwed on the side surface of the sliding groove 23, a rotating disc 25 is connected to the outer end of the threaded rod 24, a sliding block 26 capable of moving along the sliding groove 23 is connected to the inner end of the rotating disc, a tensioning adjusting wheel 27 is rotatably arranged on the outer surface of the sliding block 26, the sliding block 26 is pushed along the sliding groove 23 by rotating the threaded rod 24, and the stability of adjusting the driving roller 15 driven by the triangular belt 20 is achieved.

The utility model discloses well control circuit's connection is connected PLC 22's signal input part with pressure sensor 212, and signal output part is connected with servo charge 12 and gear motor 18.

The utility model discloses a concrete implementation is used:

when the let-off device of the present invention is used to let out warp yarns, the warp yarns 100 are first passed under the pressure sensing roller 216 and introduced onto the driving roller 15 (as shown in fig. 2). When the rotating speed of the driving roller 15 is increased, the tension of the warp yarns 100 is increased to apply a vertical upward force to the pressure sensing roller 216, when the pressure sensing roller 216 moves upwards due to the tension, the sliding block 214 applies pressure to the second spring 213, then the pressure sensor 212 converts the pressure into an electric signal and transmits the electric signal to the PLC22, the PLC22 controls the servo motor 12 to rotate in the positive direction, the lifting block 111 moves upwards under the action of the screw rod 13, the braking force applied to the braking wheel 7 by the braking belt 10 connected to the lifting block 111 is reduced, the rotating speed of the warp beam 4 is increased, and the tension of the warp yarns 100 is reduced and balanced. If the tension on the warp yarn 100 is too large and exceeds a certain value, the PLC22 controls the speed reducing motor 18 to reduce the rotating speed thereof, thereby achieving the effect of rapidly balancing the tension.

When the rotating speed of the driving roller 15 is reduced and the warp beam 4 keeps the original rotating speed to rotate due to inertia to cause the tension of the warp yarns 100 to disappear, the pressure sensing roller 216 does not receive the upward tension of the warp yarns 100, the slide block 214 moves downwards due to the gravity of the pressure sensing roller to apply pressure to the second spring 213 on the lower surface, the pressure is converted into an electric signal by the pressure sensor 212 and is transmitted to the PLC22, the PLC22 controls the servo motor 12 to rotate reversely, the lifting block 111 moves downwards under the action of the screw rod 13, the braking force applied to the braking wheel 7 by the braking belt 10 connected to the lifting block 111 is increased, the rotating speed of the warp beam 4 is reduced, and the tension balance of the warp yarns 100 is realized.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a tension self-interacting let-off motion for rapier weaving machine, includes base and stabilizer blade, its characterized in that: the support legs are fixed at four corners of the lower surface of the base, first supports are symmetrically fixed on the upper surface of the base, a warp beam is arranged between the two first supports, connecting shafts are arranged on the front end face and the rear end face of the warp beam, the connecting shafts are rotatably connected with the first supports through bearings, brake wheels are arranged at the end parts of the connecting shafts, which penetrate through the first supports, a fixed plate is connected on the base on the left side of the brake wheels, a first spring is connected on the fixed plate, a brake belt is connected at the right end of the first spring, the brake belt is provided with an adjusting box fixed on the base by bypassing the lower end of the brake wheels, a belt inlet is arranged on the upper surface of the adjusting box, the brake belt in the adjusting box is connected with a lifting block, a threaded hole is arranged on the lifting block, and a servo motor is, the end part of the output shaft of the servo motor, which extends into the adjusting box, is connected with a screw rod through a coupler, and external threads on the screw rod are matched with the threaded holes;

2. The tension self-adjusting let-off device for the rapier loom according to claim 1, wherein: the surface of second support is provided with the spout, spout side spiro union has the threaded rod that stretches into in the spout, the outer end of threaded rod is connected with the carousel, the inner of threaded rod is connected with the sliding block that can remove along the spout, the surface rotation of sliding block is provided with the tensioning regulating wheel.

3. The tension self-adjusting let-off device for the rapier loom according to claim 1, wherein: the circumference side of the driving roller is coated with a rubber skin layer, and the outer surface of the rubber skin layer is provided with friction grains at equal radian.

4. The tension self-adjusting let-off device for the rapier loom according to claim 1, wherein: and a signal input end of the PLC is connected with the pressure sensor, and a signal output end of the PLC is connected with the servo charge and the speed reducing motor.