CN108950823B

CN108950823B - Weft tension control device for rapier loom

Info

Publication number: CN108950823B
Application number: CN201811099597.4A
Authority: CN
Inventors: 罗军; 金永良; 崔长安; 陆超; 王磊
Original assignee: Pacific Textile Machinery Changshu Co ltd
Current assignee: Pacific Textile Machinery Changshu Co ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2023-04-14
Anticipated expiration: 2038-09-20
Also published as: CN108950823A; WO2020056899A1

Abstract

A weft tension control device for a rapier loom comprises a mounting seat, a yarn pressing spring piece fixing seat is arranged at the right end of the mounting seat, a weft yarn leading-out porcelain ring hole is formed in the upper portion of the yarn pressing spring piece fixing seat, and a weft yarn leading-out porcelain ring is arranged in the weft yarn leading-out porcelain ring hole; the weft yarn supporting mechanism is arranged in the middle of one upward side of the mounting seat; the electromagnet is fixed with one downward side of the left end of the mounting seat; the deflection plate resetting mechanism is arranged at the left end of the mounting seat; the left end of the yarn pressing spring piece is connected with the top of the deflection plate, the middle part of the yarn pressing spring piece is corresponding to the upper part of the weft yarn supporting mechanism, the right end of the yarn pressing spring piece is connected with the top of the yarn pressing spring piece fixing seat, the deflection plate is connected with the deflection plate resetting mechanism, a weft yarn introducing ceramic ring hole is formed in the upper end of the deflection plate, a weft yarn introducing ceramic ring is arranged in the weft yarn introducing ceramic ring hole, and the lower end of the deflection plate extends towards the direction of the electromagnet. The action transmission links are few, and the structure is simplified; the response speed of weft yarn tension adjustment is improved; the high-speed weaving requirement of the weaving machine is met; the adaptability to different weft yarns is improved.

Description

Weft tension control device for rapier loom

Technical Field

The invention belongs to the technical field of auxiliary facilities of shuttleless looms, and particularly relates to a weft tension control device for a rapier loom.

Background

In the working process of the rapier loom, the paths of weft yarns are as follows: the yarn is unwound from the bobbin, reaches a weft accumulator, passes through a tensioner (i.e. a tension control device), enters a weft detector and then enters the loom, and the weft passes through the tensioner and is applied with a certain static initial tension which is constant and important for normal weft insertion.

In the rapier weft insertion process, the actual tension of weft yarn is the superposition of dynamic tension and static initial tension, and in the weft insertion process of delicate weft yarn such as fine count single yarn, fine denier filament yarn, cashmere yarn, real silk and the like, because the strength of the delicate weft yarn is low, an overlarge weft yarn tension peak value can cause yarn breakage (namely weft breakage), so that the weft yarn tension needs to be reduced to ensure the normal weaving of a loom.

The current method for disposing the delicate weft yarns in weaving is to reduce the speed of a weaving machine, which can effectively reduce the probability of weft breakage, but the reduction of the speed of the weaving machine affects the productivity, so that the method is a negative irreparable measure.

Another situation in the prior art is: during the weft insertion process of heavy weft yarns such as thick count yarns, fine count glass fiber composite yarns, thick count basalt composite yarns and the like, the rapier tape is static when the weft insertion process is finished, the weft yarns can continuously move towards the outside of the selvedge along the original movement direction under the action of flight inertia force, after the weft connecting rapier releases the weft yarns, the tail sections of the weft yarns left outside the selvedge are longer, the waste of weft yarn raw materials is caused, the larger the unit mass of the weft yarns is or the higher the loom speed is, the higher the corresponding weft insertion speed is, the larger the weft yarn inertia is when the weft insertion is finished is, the longer the tail sections of the weft yarns left outside the selvedge are, and the waste phenomenon of the weft yarns is serious.

The current disposal method of the heavy weft yarn in the weaving process mainly comprises the following three aspects: firstly, the weft connecting sword releases weft yarns in advance, but practice proves that the advance is limited, and the effect is better than that of heavy weft yarns; secondly, the loom speed is reduced, but as before, the yield per unit time is sacrificed; thirdly, the tensioner applies enough static initial tension to the weft yarn to offset a part of the flying inertia force of the weft yarn, and the larger the unit mass of the weft yarn is, the larger the applied static initial tension is, so that the excessive static tension of the weft yarn is not favorable for normal weft insertion, and the rapier tape is damaged, for example, the rapier tape is accelerated to wear.

As can be seen from the above description, it is of positive significance to design a weft yarn tension control device that can meet both the requirement for obtaining the required tension of delicate weft yarns and can adapt to the reasonable tension required by heavy weft yarns.

The published chinese patent documents disclose technical information about weft tension control devices, such as CN2628555Y (webbing selvedge weft tension control device), CN10163249A (loom yarn tension control device), CN105803646B (a loom shuttle with a weft tension controller), and CN207210647U (automatic weft tension control device), and these patent documents are not limited to the example, and do not belong to a weft tension control device in a true shuttleless loom, and thus are not technically meaningful references for rapier loom, gripper loom, air jet loom, water jet loom, and the like in the shuttleless loom.

CN202755167U, which is a document a), recommends "a weft tension control device for an air jet loom" and CN205821622U, which is a document B), provides "a high-speed air jet loom weft tension control system", both of which belong to the category of auxiliary facilities for shuttleless looms and can objectively bring out the technical effects described in the technical effect column of the specification.

The adjustment of the tension of the weft yarn in the above-mentioned document a) is performed by changing the gap between the flywheel and the friction wheel to change the frictional force applied to the weft yarn passing between the flywheel and the friction wheel, and specifically, refer to paragraph 0033 of the specification of the patent. The document B) adjusts the tension of the weft yarn passing between the fixed and movable grippers by the engagement of a roller provided at the end of the movable gripper with the fixed gripper, and refer specifically to paragraph 0021 of the specification of the patent.

The documents a) and B) have the following general disadvantages: firstly, because the motor is used as power, the action transmission links are more, the power loss is large, and the structure is complex; secondly, because the screw rod transmission is adopted, on one hand, the action response speed is slow, and on the other hand, the screw rod has a screw pitch, so that the precision control of the tension is not facilitated; thirdly, since the tension applied to the weft yarn is generated by a contact manner in which the wheels (the friction wheel in document a and the roller in document B) are in contact with the weft yarn in a tangential direction, the weft yarn is expressed as point contact, and the weft yarn cannot pass through the weft yarn detector and enter the loom in a line contact manner in a stable tension state.

In view of the above-mentioned prior art, there is a need for improvement, for which the applicant has made an active and advantageous design, which has finally resulted in the solution described below and which has proved to be practical in tests carried out in the applicant's test center with the application of security measures.

Disclosure of Invention

The invention aims to provide a weft tension control device for a rapier loom, which is beneficial to abandon a motor as power, remarkably reduce action transmission links, reduce electric energy consumption and simplify the structure, is beneficial to improving the response speed when weft tension is adjusted and improving the precision control on the weft tension so as to adapt to the high-speed weaving requirement of the loom, is beneficial to changing the contact mode with weft so as to ensure that the weft enters the loom in a state of keeping translational tension, and is convenient to adjust the tension of the weft with different materials and different counts according to the requirement so as to further improve the adaptability to the weft.

The invention aims to accomplish the task, and the weft tension control device for the rapier loom comprises an installation seat, wherein the installation seat is installed on the rapier loom in a use state, a yarn pressing spring piece fixing seat is fixed at the right end of the installation seat, a weft leading-out porcelain ring hole is formed in the upper part of the yarn pressing spring piece fixing seat, and a weft leading-out porcelain ring is embedded in the weft leading-out porcelain ring hole; the weft yarn supporting mechanism is vertically and horizontally arranged in the middle of one upward side of the mounting seat and corresponds to the left side of the yarn pressing spring piece fixing seat; the electromagnet is fixed with one side of the left end of the mounting seat facing downwards, and an armature of the electromagnet is positioned on the left side of the electromagnet; the deflection plate resetting mechanism is arranged at the left end of the mounting seat at a position corresponding to the upper part of the electromagnet; the left end of the yarn pressing spring leaf is connected with the top of the deflection plate, the middle of the yarn pressing spring leaf corresponds to the position above the weft yarn supporting mechanism, the right end of the yarn pressing spring leaf is connected with the top of the yarn pressing spring leaf fixing seat, the deflection plate is connected with the deflection plate resetting mechanism at the position corresponding to the left end of the mounting seat, a weft yarn introducing ceramic ring hole is formed in the upper end of the deflection plate, a weft yarn introducing ceramic ring is arranged in the weft yarn introducing ceramic ring hole, and the lower end of the deflection plate extends towards the direction of the electromagnet and corresponds to the left side of the armature.

In a specific embodiment of the invention, an electromagnet fixing plate seat is fixed on the mounting seat and positioned at the rear side of the mounting seat through an electromagnet fixing plate seat screw, and the electromagnet fixing plate seat is provided with an electromagnet fixing plate extending downwards, the electromagnet fixing plate corresponds to the right rear side of the electromagnet, and the electromagnet is fixed with the electromagnet fixing plate.

In another specific embodiment of the present invention, the weft yarn holding mechanism comprises a weft yarn holding plate screw head fixing seat, a weft yarn left holding plate and a weft yarn right holding plate, the weft yarn holding plate screw head fixing seat is fixed in the middle of one upward side of the installation seat through a weft yarn holding plate screw head fixing seat screw and corresponds to the left side of the weft yarn pressing spring piece fixing seat, a weft yarn left holding plate screw head is formed in the middle of one downward side of the weft yarn left holding plate, the weft yarn left holding plate screw head is connected with the left end of the weft yarn holding plate screw head fixing seat and locked by a screw head locking nut i screwed on the tail end of the weft yarn left holding plate screw head, a weft yarn right holding plate screw head is formed in the middle of one downward side of the weft yarn right holding plate, the weft yarn right holding plate screw head is connected with the right end of the weft yarn holding plate screw head fixing seat and locked by a screw head locking nut screwed on the tail end of the weft yarn left holding plate screw head, and the surface of one side of the weft yarn pressing plate ii facing downward is simultaneously attached to the weft yarn left holding plate and the weft yarn holding plate surface of the weft yarn pressing spring piece.

In still another embodiment of the present invention, a pair of yarn pressing spring piece right connecting screw holes are formed in the top of the yarn pressing spring piece fixing seat, a pair of yarn pressing spring piece left connecting screw holes are formed in the top of the deflection plate, an elastic piece is disposed on the upward side of the left end of the yarn pressing spring piece, a pressing plate is disposed on the upward side of the right end of the yarn pressing spring piece, an elastic piece pressing plate is disposed on the upward side of the left end of the elastic piece, a pair of elastic piece pressing plate fixing screws are disposed on the elastic piece pressing plate, the pair of elastic piece pressing plate fixing screws sequentially penetrate through the elastic piece and the yarn pressing spring piece and are screwed into the pair of yarn pressing spring piece left connecting screw holes, the right end of the elastic piece is configured as a free end and is pressed against the yarn pressing spring piece, a pressing plate backing plate is disposed between the right end of the pressing plate and the right end of the yarn pressing spring piece, a pair of pressing plate fixing screws are disposed above the right end of the pressing plate, the pair of pressing plate fixing screws sequentially penetrate through the pressing plate backing plate and are configured as a free end of the yarn pressing spring piece and are pressed against the yarn pressing spring piece.

In a further embodiment of the invention, the surface of the side of the weft left retainer plate facing upwards and the surface of the side of the weft right retainer plate facing upwards are both designed as arcuate surfaces.

In a further embodiment of the present invention, a deflector plate pivot bore i is formed at the right end of the mounting base, the opening of the deflector plate pivot bore i facing leftward, a torsion spring adjuster pivot bore communicating with the deflector plate pivot bore i is formed at the front side of the left end of the mounting base and at a position corresponding to the deflector plate pivot bore i, a center shaft support bore is formed at the rear side of the left end of the mounting base and at a position corresponding to the center of the torsion spring adjuster pivot bore, the center shaft support bore also communicating with the deflector plate pivot bore i, the deflector return means is formed at the left end of the mounting base and supported at the center shaft support bore at a position corresponding to the torsion spring adjuster pivot bore, a deflector plate pivot is formed at the right side of the deflector plate and at a position corresponding to the deflector plate pivot bore i, the deflector plate pivot is connected to the deflector plate return means in the deflector plate pivot bore, the deflector plate is made of a magnetically conductive material and a deflector plate clearance is formed between the deflector plate and the deflector plate pivot bore i, and the armature is removed when the armature clearance is absorbed, and the electromagnet is released.

In a more specific embodiment of the present invention, the deflector plate shaft seat has a deflector plate shaft seat cavity ii, a deflector plate shaft seat cavity opening of the deflector plate shaft seat cavity ii faces forward and corresponds to the torsion spring adjusting seat shaft head hole, a central shaft abdicating hole is opened at a central position of a cavity bottom wall of the deflector plate shaft seat cavity ii and a deflector plate shaft seat fixing cavity bottom wall torsion spring foot intruding hole is also opened at a position at one side of the central shaft abdicating hole, the central shaft abdicating hole corresponds to the central shaft supporting hole, a shaft head locking screw seat is formed on a left end face of the mounting seat and at a position corresponding to the torsion spring adjusting seat shaft head hole, a shaft head locking screw seat cavity of the shaft head locking screw seat is communicated with the torsion spring adjusting seat shaft head hole, and a shaft head locking screw is screwed in the shaft head locking screw seat cavity; the deflection plate resetting mechanism comprises a torsion spring adjusting seat, a deflection plate central shaft and a torsion spring, wherein a torsion spring adjusting seat shaft head is formed at the rear end of the torsion spring adjusting seat, the torsion spring adjusting seat shaft head is matched with a torsion spring adjusting seat shaft head hole and locked by a shaft head locking screw, a deflection plate central shaft fixing hole is formed in the axial central position of the torsion spring adjusting seat, a hexagon wrench adjusting hole is formed in the position corresponding to the front of the deflection plate central shaft fixing hole, a torsion spring pin positioning hole is further formed in the torsion spring adjusting seat, the front end of the deflection plate central shaft is fixed with the torsion spring adjusting seat in the position corresponding to the deflection plate central shaft fixing hole, the rear end of the deflection plate central shaft penetrates through the central shaft abdicating hole and then is supported on the central shaft supporting hole, a shaft sleeve is sleeved in the middle of the deflection plate central shaft corresponding to the deflection plate shaft seat cavity II, the torsion spring is sleeved on the shaft sleeve, the torsion spring is inserted into the torsion spring pin positioning hole, and a second torsion spring pin of the torsion spring is inserted into the torsion spring foot fixing cavity bottom wall of the shaft seat fixing cavity.

In a further particular embodiment of the invention, the gap is 0.3-0.6mm.

In a still more specific embodiment of the present invention, the lower end of the pressing spring piece fixing seat is fixed to the right end face of the mounting seat by a pressing spring piece fixing seat screw, and a fixing frame is added at a position corresponding to the front side and the rear side of the pressing spring piece fixing seat, and the fixing frames at the front side and the rear side of the pressing spring piece fixing seat are connected to each other by a positioning pin and a positioning screw.

In a further embodiment of the invention, a mounting bar is fixed to the left end of the mounting base by means of a mounting bar fixing screw, which mounting bar is located below the mounting base and is fixed to the rapier weaving machine in the use state.

One of the technical effects of the technical scheme provided by the invention is that the electromagnet is adopted, the deflection plate is attracted or released by the magnet, and the yarn pressing spring piece presses or releases the yarn pressing by the deflection plate, so that the action transmission links are less, the power loss is reduced, and the structure is simplified; secondly, the electromagnet is adopted, so that the response speed of adjusting the tension of the weft yarn is improved; thirdly, the gap between the deflection plate and the electromagnet can be changed by adjusting the position of the electromagnet, so that the deflection angle of the deflection plate is changed, the precision control of the weft yarn tension can be realized, and the high-speed weaving requirement of the weaving machine is met; fourthly, the weft yarn between the yarn pressing spring piece and the weft yarn supporting mechanism can enter the weaving machine under the state of keeping translational tension because the cooperation of the yarn pressing spring piece and the weft yarn supporting mechanism is adopted; fifthly, as the gap between the deflection plate and the electromagnet can be changed according to requirements, the deflection degree of the deflection plate can be changed according to requirements, the flexible adjustment requirement of weft yarn tension with different materials and different counts is met, and the adaptability to different weft yarns is improved.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a schematic front side view of fig. 1.

Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.

In the following description, any concept related to the directions or orientations of up, down, left, right, front and rear is given with respect to the position of fig. 1, and thus it should not be understood as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2, a mounting base 1 is shown, the mounting base 1 is mounted on a rapier loom in a use state, a yarn pressing spring piece fixing base 11 is fixed at the right end of the mounting base 1, a weft yarn leading-out porcelain ring hole 111 is formed in the upper portion of the yarn pressing spring piece fixing base 11, and a weft yarn leading-out porcelain ring 1111 is embedded in the weft yarn leading-out porcelain ring hole 111; a weft yarn supporting mechanism 2 is shown, the weft yarn supporting mechanism 2 is arranged in the middle of one upward side of the mounting seat 1 in an up-and-down adjusting mode and corresponds to the left side of the yarn pressing spring piece fixing seat 11; an electromagnet 3 is shown, the electromagnet 3 is fixed with the downward side of the left end of the mounting seat 1, and the armature 31 of the electromagnet 3 is positioned at the left side of the electromagnet 3, according to the professional knowledge, in the using state, the electromagnet 3 is electrically controlled and connected with an electric controller of the rapier loom, as shown in fig. 2, an adjusting groove 331 is arranged on the electromagnet fixing lug 33 of the electromagnet 3, and the position of the electromagnet 3 can be adjusted according to the requirement through the adjusting groove 331; a deflector plate return mechanism 4 is shown, the deflector plate return mechanism 4 being provided at the left end of the mount base 1 at a position corresponding to above the electromagnet 3; a yarn pressing spring 5 and a deflection plate 6 are shown, the left end of the yarn pressing spring 5 is connected with the top of the deflection plate 6, the middle of the yarn pressing spring 5 corresponds to the upper part of the weft yarn supporting mechanism 2, the right end of the yarn pressing spring 5 is connected with the top of the yarn pressing spring fixing seat 11, the deflection plate 6 is connected with the deflection plate resetting mechanism 4 at the position corresponding to the left end of the mounting seat 1, a weft yarn introducing ceramic ring hole 61 is arranged at the upper end of the deflection plate 6, a weft yarn introducing ceramic ring 611 is arranged in the weft yarn introducing ceramic ring hole 61, and the lower end of the deflection plate 6 extends towards the electromagnet 3 and corresponds to the left side of the armature 31.

An electromagnet fixing plate base 12 is fixed to the mount base 1 at the rear side of the mount base 1 by an electromagnet fixing plate base screw 121, the electromagnet fixing plate base 12 has a downwardly extending electromagnet fixing plate 122, the electromagnet fixing plate 122 corresponds to the right rear side of the electromagnet 3 and the electromagnet 3 is fixed to the electromagnet fixing plate 122 by an electromagnet fixing screw 32, and specifically, the electromagnet fixing lug 331 is fixed to the electromagnet fixing plate 122 by the electromagnet fixing screw 32 at a position corresponding to the adjustment groove 331.

Continuing with fig. 1 and 2, the aforementioned weft yarn holding mechanism 2 includes a weft yarn holding plate screw head fixing seat 21, a weft yarn left holding plate 22 and a weft yarn right holding plate 23, the weft yarn holding plate screw head fixing seat 21 is fixed at the middle of the upward side of the aforementioned mounting seat 1 by a weft yarn holding plate screw head fixing seat screw 211 and corresponds to the left side of the aforementioned pressing spring piece fixing seat 11, a weft yarn left holding plate screw head 221 is formed (i.e. fixed) at the middle position of the downward side of the weft yarn left holding plate 22, the weft yarn left holding plate screw head 221 is connected with the left end of the weft yarn holding plate screw head fixing seat 21 and locked by a screw head locking nut i 2211 screwed at the end of the weft yarn left holding plate screw head 221, a weft yarn right holding plate screw head 231 is formed (i.e. fixed) at the middle position of the downward side of the weft yarn right holding plate 23, the weft yarn right holding plate screw head 231 is connected with the right holding plate screw head fixing seat 21 and is connected with the right screw head 2315 screwed at the end of the weft yarn holding plate ii and pressed against the weft yarn holding plate surface 2315. When the weft yarn 7 shown in the figure passes over the upper surfaces of the left weft yarn holding plate 22 and the right weft yarn holding plate 23, the downward side of the middle part of the yarn pressing spring piece 5 contacts the weft yarn 7.

The heights (ascending or descending) of the left weft supporting plate 22 and the right weft supporting plate 23 can be changed by adjusting the left weft supporting plate screw head 221 and the right weft supporting plate screw head 231, so that the tightness of the weft yarns 7 pressed and held by the yarn pressing spring piece 5 is changed, and the adjustment of the static initial tension of different weft yarns 7 is realized. Furthermore, the initial static tension applied to the weft yarn 7 can be obtained by changing the thickness of the yarn-pressing spring piece 5.

As shown in fig. 1, a pair of right yarn pressing spring piece connecting screw holes 112 are formed in the top of the yarn pressing spring piece fixing seat 11, a pair of left yarn pressing spring piece connecting screw holes 62 are formed in the top of the deflector 6, an elastic piece 51 is provided on the upward side of the left end of the yarn pressing spring piece 5, a pressing plate 52 is provided on the upward side of the right end of the yarn pressing spring piece 5, an elastic piece pressing plate 511 is provided on the upward side of the left end of the elastic piece 51, a pair of elastic piece pressing plate fixing screws 5111 is provided on the elastic piece pressing plate 511, the pair of elastic piece pressing plate fixing screws 5111 are screwed into the pair of left yarn pressing spring piece connecting screw holes 62 through the elastic piece 51 and the yarn pressing spring piece 5 in this order, the right end of the elastic piece 51 is configured as a free end and is pressed against the yarn pressing spring piece 5, a pressing plate pad plate 521 is provided between the right end of the pressing plate 52 and the right end of the yarn pressing spring piece 5, a pair of pressing plate fixing screws 522 is provided on the upper side of the right end of the pressing plate 52, the pair of pressing plate fixing screws 522 is configured as a pair of pressing plate and a pressing plate fixing screws 521 are screwed into the left yarn pressing spring piece 5 and are configured as a pair of pressing plate 52. The elastic piece 51 and the pressing plate 52 (also referred to as "pressing plate") function to ensure the pressing effect of the yarn pressing spring piece 5 on the weft yarn 7.

As shown in fig. 1, the upward surface of the left weft supporting plate 22 and the upward surface of the right weft supporting plate 23 are both formed as arcuate surfaces, that is, the overall shape of the left weft supporting plate 22 and the right weft supporting plate 23 is a bread shape in the food category, which can ensure that the weft yarn 7 obtains a desired tension and reduce the running resistance to the weft yarn 7.

Continuing to refer to fig. 1, a substantially U-shaped deflector plate pivot housing i 13 is formed at the right end of the mount base 1, the opening of the deflector plate pivot housing i 13 faces leftward, a torsion spring adjuster pivot hole 14 is formed at the front side of the left end of the mount base 1 and at a position corresponding to the deflector plate pivot housing i 13, the torsion spring adjuster pivot hole 14 communicates with the deflector plate pivot housing i 13, a center shaft support hole 15 is formed at the rear side of the left end of the mount base 1 and at a position corresponding to the center of the torsion spring adjuster pivot hole 14, the center shaft support hole 15 also communicates with the deflector plate pivot housing i 13, the deflector return mechanism 4 is provided at the left end of the mount base 1 and supported by the center shaft support hole 15 at a position corresponding to the torsion spring adjuster pivot hole 14, a deflector plate pivot housing 63 is formed at the right side of the deflector plate 6 and at a position corresponding to the deflector plate pivot housing i 13, and the deflector plate pivot housing 63 is connected to the deflector plate pivot housing i 13.

In order to secure the strength of the deflector 6, a deflector reinforcing rib 64 is formed in the middle of the deflector 6 in the height direction and on the left side. The deflection plate 6 is made of a magnetically conductive material and a gap S is formed between the deflection plate 6 and the electromagnet 3, which gap S disappears when the armature 31 attracts the deflection plate 6, and which gap S recovers when the armature 31 releases the attraction of the deflection plate 6, i.e., when the deflection plate 6 is released.

The aforementioned tilt plate shaft seat 63 has a tilt plate shaft seat cavity ii 631, the tilt plate shaft seat cavity mouth of the tilt plate shaft seat cavity ii 631 faces forward and corresponds to the aforementioned torsion spring adjustment seat shaft head hole 14, a center shaft abdicating hole 6311 is opened at the center position of the cavity bottom wall of the tilt plate shaft seat cavity ii 631, and a tilt plate shaft seat fixing cavity bottom wall torsion spring foot penetrating hole 6312 is further opened at a position at one side of the center shaft abdicating hole 6311, the aforementioned center shaft abdicating hole 6311 corresponds to the aforementioned center shaft supporting hole 15, a shaft head locking screw seat 16 is formed on the left end face of the aforementioned mounting seat 1 and at a position corresponding to the aforementioned torsion spring adjustment seat shaft head hole 14, the shaft head locking shaft head screw seat cavity 161 of the locking screw seat 16 communicates with the aforementioned torsion spring adjustment seat shaft head hole 14, and a shaft head locking screw 1611 is screwed in the shaft head locking screw seat cavity 161.

Referring to fig. 3 in conjunction with fig. 1, the aforementioned deflector plate return mechanism 4 includes a torsion spring adjustment seat 41, a deflector plate center shaft 42 and a torsion spring 43, wherein a torsion spring adjustment seat spindle head 411 is formed at the rear end of the torsion spring adjustment seat 41, the torsion spring adjustment seat spindle head 411 is engaged with the aforementioned torsion spring adjustment seat spindle head hole 14 and locked by the aforementioned spindle head locking screw 1611, a deflector plate center shaft fixing hole 412 is formed at the axial center position of the torsion spring adjustment seat 41, a hex wrench adjusting hole 413 (i.e., "hex head adjusting hole") is formed at a position corresponding to the front of the deflector plate center shaft fixing hole 412, a torsion spring pin positioning hole 414 is formed in the torsion spring adjustment seat 41, the front end of the deflector plate center shaft 42 is fixed to the torsion spring adjustment seat 41 at a position corresponding to the deflector plate center shaft fixing hole 412, the rear end of the deflector plate center shaft 42 is supported on the aforementioned center shaft supporting hole 15 after passing through the aforementioned center shaft yielding hole 6311, a central portion of the deflector plate center shaft 42 corresponds to the deflector plate center shaft seat cavity 412 and is sleeved with a sleeve 631, a sleeve ii, one end of the deflector plate center shaft 421 is inserted into the torsion spring cavity 6311 and inserted into the second deflector plate pin inserting hole 6311, and the second torsion spring leg inserting hole 432 is inserted into the second torsion spring leg hole 432 substantially inserted into the second torsion spring pin 6311 of the torsion spring leg 6311, and inserted into the second torsion spring leg hole 6343, and inserted into the second torsion spring leg hole 6311 of the deflector plate pin 6343.

The locking screw 1611 of the opening shaft head is loosened and the wrench head (outer hexagon wrench head) is inserted into the hexagon wrench adjusting hole 413 to adjust the torsion spring fixing seat 41 by a certain angle in the clockwise or counterclockwise direction, so that the torsion of the torsion spring 43 can be changed, and the acting force of the torsion spring 43 on the deflection plate 6 can be further changed. After the adjustment of the torsion spring adjustment seat 41 is completed, the spindle head locking screw 1611 is returned to the locking state of the torsion spring adjustment seat spindle head 411.

The aforementioned gap S is preferably 0.3 to 0.6mm, more preferably 0.45 to 0.55mm, still more preferably 0.5mm, and 0.5mm is selected in this embodiment. The adjustment of the gap S can be achieved by changing the position of the electromagnet fixing screw 32 on the adjustment groove 331, specifically, by slightly moving the electromagnet 3 to the left or right, thereby changing the gap S.

As shown in fig. 1, the lower end of the pressing spring piece fixing seat 11 is fixed to the right end face of the mounting seat 1 by a pressing spring piece fixing seat screw 113, and fixing frames 114 are respectively added at positions corresponding to the front side and the rear side of the pressing spring piece fixing seat 11, and the fixing frames 114 located at the front side and the rear side of the pressing spring piece fixing seat 11 are connected to each other by a positioning pin 1141 and a positioning screw 1142.

A mounting rod 17 is fixed to the left end of the mounting base 1 by a mounting rod fixing screw 171, and the mounting rod 17 is located below the mounting base 1 and is fixed to the rapier loom in a use state.

According to the applicant's description in the above background section and according to the common general knowledge in the art: the position of the invention on a rapier loom is positioned between a weft accumulator and a weft yarn detector, the weft yarn detector is usually provided with a weft yarn tension sensor for sensing the tension of weft yarn 7, bobbin yarn (simple yarn, also called bobbin) is arranged in front of the weft accumulator, the weft yarn 7 is led into the loom after going out of the weft yarn detector, concretely, the weft yarn 7 is led in from a weft yarn leading-in porcelain ring 611 of the invention after passing through the weft accumulator from the bobbin yarn, passes through the space between a weft yarn left supporting plate 22 and a weft yarn right supporting plate 23 and a yarn pressing spring piece 5 and is led out from a weft yarn leading-out porcelain ring 1111, and then enters the loom through the weft yarn detector provided with the weft yarn tension sensor.

The weft tension control device of the present invention applies a static initial tension to the weft yarn 7 under normal conditions, and when the aforementioned weft tension sensor detects that the tension of the weft yarn 7 reaches or exceeds a preset value, the weft tension control device of the present invention cancels the static initial tension applied to the weft yarn 7, thereby being able to reduce the actual tension of the weft yarn 7 so as to weave a delicate weft yarn at a higher speed by the loom.

According to the invention, static initial tension is applied to the weft yarn 7, the electromagnet 3 is electrified, the armature 31 attracts the deflection plate 6, the deflection plate 6 rotates around the deflection plate central shaft 42 by an angle, namely, the lower end of the deflection plate 6 moves rightwards, and the upper end of the deflection plate 6 moves leftwards, so that the yarn pressing spring piece 5 is driven (i.e. pulled), the yarn pressing spring piece 5 is in a tight state, at the moment, the yarn pressing spring piece 5 presses the weft yarn 7 downwards, and the static initial tension is applied to the weft yarn 7. When the electromagnet 3 is de-energized, the deflection plate 6 resets under the action of the torsion spring 43, the electromagnet 3 is separated from the attraction, and the yarn pressing spring piece 5 relaxes and does not press the weft yarns 7 any more.

Based on the structure of the invention, when heavy weft yarns such as the weft yarns 7 of the thick count yarns, the thick count glass fiber composite yarns, the thick count basalt composite yarns and the like are faced, as mentioned above, because the rapier tape is static when the rapier head weft insertion process is finished, the weft yarns 7 can continue to move outwards along the original movement direction or movement track under the action of flight inertia force, the tail sections of the weft yarns left outside the selvedge after the weft connecting rapier releases the weft yarns are longer, and waste is easily caused. Therefore, the electromagnet 3 with the structure of the invention can be controlled by an electric controller of the rapier loom, so that the waste of the weft yarn 7 can be avoided, and the electric controller comprises the following specific components: when the rapier head weft insertion process is finished, the electromagnet 3 is electrified to attract the deflection plate 6, and according to the above description, the weft yarn spring 5 applies clamping force to the weft yarn 7 to prevent the weft yarn 7 from moving towards the outside of the selvedge.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. A weft tension control device for a rapier loom is characterized by comprising a mounting seat (1), wherein the mounting seat (1) is mounted on the rapier loom in a use state, a yarn pressing spring piece fixing seat (11) is fixed at the right end of the mounting seat (1), a weft yarn leading-out ceramic ring hole (111) is formed in the upper part of the yarn pressing spring piece fixing seat (11), and a weft yarn leading-out ceramic ring (1111) is embedded in the weft yarn leading-out ceramic ring hole (111); the weft yarn supporting mechanism (2) is arranged in the middle of one upward side of the mounting seat (1) in a vertically adjustable mode and corresponds to the left side of the yarn pressing spring piece fixing seat (11); the electromagnet (3) is fixed with one side of the left end of the mounting seat (1) facing downwards, and an armature (31) of the electromagnet (3) is positioned on the left side of the electromagnet (3); the deflection plate resetting mechanism (4) is arranged at the left end of the mounting seat (1) at a position corresponding to the upper part of the electromagnet (3); the left end of the yarn pressing spring piece (5) is connected with the top of the deflection plate (6), the middle of the yarn pressing spring piece (5) corresponds to the upper part of the weft yarn supporting mechanism (2), the right end of the yarn pressing spring piece (5) is connected with the top of the yarn pressing spring piece fixing seat (11), the deflection plate (6) is connected with the deflection plate resetting mechanism (4) at the position corresponding to the left end of the mounting seat (1), a weft yarn introducing porcelain ring hole (61) is formed in the upper end of the deflection plate (6), a weft yarn introducing porcelain ring (611) is arranged in the weft yarn introducing porcelain ring hole (61), and the lower end of the deflection plate (6) extends towards the electromagnet (3) and corresponds to the left side of the armature iron (31); a deflector plate shaft housing I (13) is formed at the right end of the mounting base (1), the opening of the deflector plate shaft housing I (13) faces leftward, a torsion spring adjusting base shaft head hole (14) is formed at the front side of the left end of the mounting base (1) and at a position corresponding to the deflector plate shaft housing I (13), the torsion spring adjusting base shaft head hole (14) communicates with the deflector plate shaft housing I (13), a center shaft bearing hole (15) is formed at the rear side of the left end of the mounting base (1) and at a position corresponding to the center of the torsion spring adjusting base shaft head hole (14), the center shaft bearing hole (15) also communicates with the deflector plate shaft housing I (13), the deflector plate return mechanism (4) is disposed at the left end of the mounting base (1) and supported on the center shaft bearing hole (15) at a position corresponding to the torsion spring adjusting base shaft head hole (14), the deflector plate return mechanism (4) is disposed at the right side of the deflector plate (6) and at a position corresponding to the deflector plate shaft head hole (13) and is formed with a deflector plate shaft housing I (13) and is connected with the deflector plate (6) by a magnetic conductive plate (6) and a magnetic plate (6) is formed in the deflector plate (6) and a gap is formed between the deflector plate (6) and the armature (6) is formed when the deflector plate (6) is connected with the deflector plate (6) and the deflector plate (13), the gap (S) disappears and recovers when the armature (31) releases the attraction of the deflection plate (6); the deflector plate shaft seat (63) is provided with a deflector plate shaft seat cavity II (631), the cavity mouth of the deflector plate shaft seat cavity II (631) faces forward and corresponds to the torsion spring adjusting seat shaft head hole (14), a central shaft abdicating hole (6311) is formed in the central position of the cavity bottom wall of the deflector plate shaft seat cavity II (631), a deflector plate shaft seat fixing cavity bottom wall torsion spring foot intruding hole (6312) is further formed in the position on one side of the central shaft abdicating hole (6311), the central shaft abdicating hole (6311) corresponds to the central shaft supporting hole (15), a shaft head locking screw seat (16) is formed on the left end face of the mounting seat (1) and in the position corresponding to the torsion spring adjusting seat shaft head hole (14), a locking shaft head screw seat cavity (161) of the shaft head locking screw seat (16) is communicated with the torsion spring adjusting seat shaft head hole (14), and a shaft head locking screw (1611) is matched in the locking shaft head cavity (161); the deflection plate resetting mechanism (4) comprises a torsion spring adjusting seat (41), a deflection plate central shaft (42) and a torsion spring (43), a torsion spring adjusting seat shaft head (411) is formed at the rear end of the torsion spring adjusting seat (41), the torsion spring adjusting seat shaft head (411) is matched with the torsion spring adjusting seat shaft head hole (14) and is locked by a shaft head locking screw (1611), a deflection plate central shaft fixing hole (412) is formed in the axial central position of the torsion spring adjusting seat (41), a hexagon wrench adjusting hole (413) is formed in the position corresponding to the front of the deflection plate central shaft fixing hole (412), and a torsion spring foot positioning hole (414) is further formed in the torsion spring adjusting seat (41), the front end of the deflector plate central shaft (42) is fixed with a torsion spring adjusting seat (41) at a position corresponding to a deflector plate central shaft fixing hole (412), the rear end of the deflector plate central shaft (42) is supported on the central shaft supporting hole (15) after passing through the central shaft abdicating hole (6311), the middle part of the deflector plate central shaft (42) corresponds to the deflector plate shaft seat cavity II (631) and is sleeved with a shaft sleeve (421), a torsion spring (43) is sleeved on the shaft sleeve (421), a first torsion spring foot (431) of the torsion spring (43) is inserted into a torsion spring foot positioning hole (414), and a second torsion spring foot (432) of the torsion spring (43) is inserted into a torsion spring foot probing hole (f) at the bottom wall of the deflector plate shaft seat fixing cavity (chamber) (a) and (b) of the torsion spring (432) is inserted into the deflector plate shaft seat fixing cavity 6312 In (c),.

2. Weft tension control device for rapier looms according to claim 1, characterized in that an electromagnet fixing plate holder (12) is fixed on said mounting seat (1) and at the rear side of the mounting seat (1) by an electromagnet fixing plate holder screw (121), the electromagnet fixing plate holder (12) having a electromagnet fixing plate (122) extending downward, the electromagnet fixing plate (122) corresponding to the right rear of said electromagnet (3) and the electromagnet (3) being fixed with the electromagnet fixing plate (122).

3. The weft tension control device for rapier loom according to claim 1, characterized in that said weft holding mechanism (2) comprises a weft holding plate screw head fixing seat (21), a weft left holding plate (22) and a weft right holding plate (23), said weft holding plate screw head fixing seat (21) is fixed at the middle of the upward side of said mounting seat (1) by weft holding plate screw head fixing seat screw (211) and corresponding to the left side of said pressing spring piece fixing seat (11), a weft left supporting plate screw head (221) is formed at the central position of the downward side of the weft left supporting plate (22), the weft left supporting plate screw head (221) is connected with the left end of a weft supporting plate screw head fixing seat (21) and is locked by a screw head locking nut I (2211) which is screwed at the tail end of the weft left supporting plate screw head (221), a weft right supporting plate screw head (231) is formed at the central position of the downward side of the weft right supporting plate (23), the weft yarn right supporting plate screw head (231) is connected with the right end of a weft yarn supporting plate screw head fixing seat (21) and is locked by a screw head locking nut II (2311) which is screwed at the tail end of the weft yarn right supporting plate screw head (231), the downward side of the middle part of the yarn pressing spring piece (5) is simultaneously contacted with the upward side surfaces of the weft left supporting plate (22) and the weft right supporting plate (23).

4. The weft tension control device for the rapier loom according to claim 1, characterized in that a pair of right connecting screw holes (112) of the presser spring piece are opened at the top of the presser spring piece holder (11), a pair of left connecting screw holes (62) of the presser spring piece are opened at the top of the deflector (6), an elastic piece (51) is provided at the side of the presser spring piece (5) facing upward at the left end, a presser plate (52) is provided at the side of the presser spring piece (5) facing upward at the right end, an elastic piece presser plate (511) is provided at the side corresponding to the upper side of the left end of the elastic piece (51), a pair of elastic piece presser plate fixing screws (5111) are provided on the elastic piece presser plate (511), the pair of elastic piece presser plate fixing screws (5111) sequentially pass through the elastic piece (51) and the presser spring piece (5) and are screwed into the pair of left connecting screw holes (62) of the presser spring piece, the right end of the elastic piece (51) is configured as a free end and is pressed against the presser spring piece (5), a pair of presser plate fixing screws (521) are provided between the right end of the presser spring piece (52) and the presser plate fixing screw hole (522) corresponding to the right end of the presser plate (521), the left end of the pressing plate (52) is configured as a free end and is pressed against the yarn pressing spring piece (5).

5. Weft tension control device for rapier loom according to claim 3, characterized in that the surface of the upward side of said weft left holding plate (22) and the surface of the upward side of said weft right holding plate (23) are each constituted as an arcuate surface.

6. Weft tension control device for rapier looms according to claim 1, characterized in that said gap (S) is 0.3-0.6mm.

7. The weft tension control device for the rapier loom according to claim 1 or 3, wherein the lower end of the presser spring holder (11) is fixed to the right end surface of the mounting base (1) by means of a presser spring holder fixing screw (113), and a fixing frame (114) is added at positions corresponding to the front side and the rear side of the presser spring holder (11), and the fixing frames (114) at the front side and the rear side of the presser spring holder (11) are connected to each other by a positioning pin (1141) and a positioning screw (1142).

8. Weft tension control device for rapier weaving machine according to claim 1, characterized in that a mounting rod (17) is fixed at the left end of said mounting base (1) by means of mounting rod fixing screw (171), which mounting rod (17) is located below mounting base (1) and fixed with said rapier weaving machine in use.