WO2009150825A1

WO2009150825A1 - Weft knitting machine equipped with movable sinker

Info

Publication number: WO2009150825A1
Application number: PCT/JP2009/002598
Authority: WO
Inventors: 宮井卓哉
Original assignee: 株式会社島精機製作所
Priority date: 2008-06-13
Filing date: 2009-06-09
Publication date: 2009-12-17
Also published as: EP2305866A1; CN102046867B; JPWO2009150825A1; JP5414670B2; EP2305866B1; EP2305866A4; CN102046867A

Abstract

Provided is a weft knitting machine equipped with a movable sinker wherein a sufficient depression force can be obtained through a simple arrangement even under a closed state. A movable sinker (50) includes a sinker (51), a sinker jack (52) and a wire spring (53). The wire spring (53) abuts on the tip (52a) of the sinker jack (52) and is supported thereby. The wire spring (53) presses the tip (52a) of the sinker jack (52) from the surface side on the tooth mouth (2) side and presses the tip (52a) to clamp from the back side through a passive arm (51e) of the sinker (51), both under open state and closed state of the sinker (51) so long as a load is not applied to a knitting yarn receiver (51d). Consequently, the fabric of the tooth mouth (2) can be depressed with a depression force of the substantially same level as that under open state even if the stroke of the sinker (51) increases under closed state.

Description

Flat knitting machine with movable sinker

The present invention relates to a flat knitting machine including a sinker that can also push down a knitted fabric with a movable sinker.

Conventionally, a flat knitting machine 1 having a movable sinker as shown in a schematic configuration in FIG. 5 has been used (see, for example, Patent Document 1). In the flat knitting machine 1, the needle bed 3 is disposed so as to face the front and rear with the tooth opening 2 interposed therebetween. Each needle bed 3 is inclined such that the side of the tooth opening 2 is high and the distance from the tooth opening 2 is low. However, for convenience of explanation, only one of the front and back needle beds 3 is shown in a horizontal posture.

The needle bed 3 is formed by erecting a needle plate 5 at a constant pitch on a strip-like base 4 extending in a direction perpendicular to the paper surface. A needle groove 6 is formed between adjacent needle plates 5. The wire 7 penetrates between the base 4 and the needle plate 5 and performs positioning. A knitting needle 8 is accommodated in the needle groove 6. However, the knitting needle 8 is shown only in the vicinity of the hook at the tip, and the other components are omitted. In FIG. 5B, the knitting needle 8 is not shown. The knitting needle 8 can be slidably displaced in the lateral direction in the drawing within the needle groove 6, and the hook at the tip of the knitting needle 8 advances and retracts to the tooth opening 2 by this sliding displacement. Between adjacent knitting needles 8, a movable sinker 10 is juxtaposed on one side of the needle plate 5.

The movable sinker 10 includes a sinker 11 that swings and displaces between an open state shown in FIG. 5 (a) and a closed state shown in FIG. 5 (b). The open state and the closed state of the sinker 11 are controlled by the sinker jack 12. The sinker 11 has a working arm 11b on the side of the mouth 2 from the support portion 11a. The working arm 11b is provided with a loop forming portion 11c and a knitting yarn receiving portion 11d. A passive arm 11e also extends from the support portion 11a. Inside the support part 11a of the sinker 11, the wire spring 13 is accommodated. The outer periphery of the support portion 11 a of the sinker 11 is formed in an arc shape and is supported by the sinker support portion 5 a of the needle plate 5 so as to be able to swing and displace. The support part 11 a and the wire spring 13 of the sinker 11 are accommodated in a sinker accommodation part 5 b formed by reducing the plate thickness on the side of the tooth opening 2 of the needle plate 5. The wire spring 13 oscillates with the support portion 11 a of the sinker 11 as a fulcrum and biases a resilient torque in the direction in which the working arm 11 b advances to the tooth opening 2.

The sinker jack 12 has a distal end portion 12a on the side of the tooth mouth 2 and a base portion 12b on the side away from the tooth mouth 2. The base 12b is provided with a bat 12c and is driven by a cam mechanism mounted on a carriage that runs along the needle bed 3 in a direction perpendicular to the paper surface. A lacking portion 12d extending in the lateral direction in the figure is formed in the intermediate portion of the base portion 12b. A band 15 penetrating in the direction perpendicular to the paper surface is inserted into the lacking portion 12d. The band 15 also penetrates the band through-hole 5c of the needle plate 5 and restricts it from falling out of the needle groove 6 when the sinker jack 12 slides and displaces. The sinker jack 12 and the sinker 11 are coupled to each other by engaging the tip of the passive arm 11e of the sinker 11 with the engaging portion 12e formed near the tip 12a of the sinker jack 12. The engaging portion 12e of the sinker jack 12 is larger than the size of the tip of the passive arm 11e of the sinker 11, and the tip of the passive arm 11e is loosely fitted to the engaging portion 12e. For this reason, when the force received by the knitting yarn receiving portion 11d on the working arm 11b side of the sinker 11 from the knitting yarn or the like becomes larger than the urging force by the wire spring 13, the tip of the passive arm 11e contacts the back side of the engaging portion 12e. Until then, the sinker 11 swings and displaces in the direction in which the working arm 11b is withdrawn from the mouth 2. With such a oscillating displacement, the movable sinker 10 can relieve the reaction force against the knitting yarn and the like so that an excessive presser force does not act.

One end of the wire spring 13 is supported on the base end side of the working arm 11 b of the sinker 11, and the other end is supported by a spring stopper 5 d provided near the tip of the needle plate 5. The elastic force of the wire spring 13 is large in the open state and small in the closed state. In the open state, a large elastic force of the wire spring 13 acts to pull out the engaging portion 12e of the sinker jack 12 to the tooth opening 2 side via the passive arm 11e of the sinker 11. The sinker jack 12 is provided with a protrusion 12 f in order to keep the sinker jack 12 away from the tooth opening 2 against the drawer and maintain the sinker 11 in the open state. The protrusion 12 f can be locked by a wire 16, and the wire 16 passes through the wire through hole 5 e of the needle plate 5.

6 and 7 show the configurations of the base 4 and the needle plate 5 combined to form the needle bed 3 of FIG. 5 as a side sectional view and a side view, respectively. The base 4 is provided with a needle plate insertion groove 4a into which the needle plate 5 is inserted, and the surface is a needle groove bottom surface 4b. A sinker groove 4 c that accommodates the working arm 11 b of the sinker 11 is provided at the tip of the base 4.

FIG. 8 shows the configuration of the sinker 11 and the wire spring 13 of FIG. 5 as a side view of the combined state. A detour portion 13 a of the wire spring 13 is accommodated inside the support portion 11 a of the sinker 11. The urging portion 13b serving as one end of the wire spring 13 applies torque to a portion where the working arm 11b extends from the support portion 11a. The support portion 13c of the wire spring 13 is a free end. A portion corresponding to the urging portion 13b of the wire spring 13 can be extended from the sinker 11, and a portion corresponding to the sinker 11 and the wire spring 13 can be integrally formed (see, for example, Patent Document 2). However, in the member corresponding to the sinker 11 of Patent Document 2, a portion corresponding to the passive arm 11e is formed to extend in the horizontal direction and is driven in the vertical direction by a presser provided on the carriage.

FIG. 9 shows the configuration of the sinker jack 12 of FIG. 5 as a side view. When the sinker jack 12 is driven with respect to the bat 12c, the engaging portion 12e is displaced in the horizontal direction in the figure.

FIG. 10 shows a schematic configuration of a drive mechanism used in the flat knitting machine 1 of FIG. The knitting needle 8 in FIG. 5 is driven by a knitting needle operating cam mechanism 20. The knitting needle actuation cam mechanism 20 is mounted on a carriage 21 that reciprocates along the needle bed 3 in a direction perpendicular to the paper surface of FIG. A solenoid 22 is provided on at least one side of the carriage 21 in the traveling direction. The carriage 21 is also provided with a needle selection mechanism 23 for selectively driving the knitting needle 8 by the knitting needle operating cam mechanism 20.

The knitting needle actuating cam mechanism 20 guides the bat of the knitting needle 8 with a cam including a middle mountain 25, a mountain crest 26, a top mountain 27, and the like so as to draw a guide locus 8a according to the traveling direction of the carriage 21, for example. The illustrated guide locus 20a corresponds to the case where the knitting needle 8 performs a knitting operation. In the knitting needle operating cam mechanism 20, the guide locus 20 a can be switched so that the knitting needle 8 performs various knitting operations according to a plurality of needle selection states by the needle selection mechanism 23. If the knitting needle 8 is a compound needle having a slider, a slider cam 28 for the slider is also provided to guide the slider bat so as to draw a guide locus 28a.

The driving for switching between the open state and the closed state of the movable sinker 10 in FIG. The sinker operating cam mechanism 30 includes a moving cam 31, swing cams 32 and 33, and a pause cam 34, and guides the butt 12c of the sinker jack 12 so as to draw a guide locus 30a. The moving cam 31 moves to the downstream side in the moving direction of the carriage 21 by a reaction force when driving the bat 12c. When the knitting yarn is supplied to the hook of the knitting needle 8 at the mouth 2 by the moving cam 31, the sinker 11 is driven in the opening direction, and the working arm 11b is moved backward from the mouth 2 so that the yarn feeding is hindered. Can not be. The swing cams 32 and 33 are interlocked so that only the upstream side in the traveling direction of the carriage 21 acts. When the carriage 21 travels to the left in the drawing, the swing cam 32 retracts the sinker jack 12 before guiding the bat of the knitting needle 8 with the intermediate mountain 25 and advances the knitting needle 8 into the tooth mouth 2. 2. The working arm 11b of the sinker 11 is once retracted from 2. When the sinker 11 is moved backward from the tooth opening 2, the distance between the urging portion 13 b and the support portion 13 c of the wire spring 13 is narrowed, and the elasticity is increased. Since the swing cam 32 stops the sinker jack 12 immediately after the sinker jack 12 is retracted, the working arm 11b is urged by the increased elastic force and re-enters the tooth mouth 2, The knitting yarn can be reliably pushed down by the knitting yarn receiving portion 11d. As shown in FIG. 5A, in order to hold the protrusion 12f of the sinker jack 12 with the wire 16 and keep the open state, the pause cam 34 is operated by the solenoid 22 and the sinker jack 12 is moved backward. Let
International Publication No. 05/012613 Pamphlet International Publication No. 08/018185 Pamphlet

In the movable sinker 10 shown in FIG. 5, the torque of the wire spring 13 that biases the working arm 11b of the sinker 11 toward the tooth opening 2 in the open state is maximized, and the torque is minimized in the closed state. The force with which the knitting yarn receiving portion 11d pushes down the knitted fabric at the tooth opening 2 is minimum in the closed state. If an attempt is made to obtain a large pressing force in the closed state, the torque of the wire spring 13 in the open state increases, and there is a risk that the wire spring 13 itself becomes excessively strong beyond the limit of strength.

The flat knitting machine 1 can be knitted so as to increase the stitch loop by needle knitting or the like. However, when the stitch loop becomes large, the advance stroke of the working arm 11b to the tooth opening 2 in the closed state of the sinker 11 also increases, and it becomes difficult to obtain an appropriate torque with the wire spring 13. If an attempt is made to obtain a sufficient pressing force in the closed state where the advance stroke of the sinker 11 is large, the torque becomes excessive in the open state, and the wire spring 13 may be broken. If the center diameter of the detour portion 13a of the wire spring 13 is increased, or if the coil is wound in a plurality of turns, the rapid increase in torque can be mitigated, but the movable sinker 10 can be increased in size, Will be complicated.

An object of the present invention is to provide a flat knitting machine including a movable sinker that can obtain a sufficient pressing force in a closed state even with a simple configuration.

The present invention is provided with a plurality of sinkers arranged in a swingable state on the tip side of a needle bed facing a tooth opening serving as a knitted fabric knitting region, and each sinker is curved and extends to the mouth opening side. And a passive arm provided on the side away from the mouth, and a closed state in which the knitted fabric receiving portion provided near the tip of the working arm pushes down the knitted fabric in the mouth mouth, and the knitting yarn receiving portion is the mouth opening. The sinker driving member acting on the passive arm can be switched between a displacement in which the tip of the sinker drive member approaches the tooth mouth side and a displacement in which the tip part of the sinker moves away from the tooth mouth side. In a flat knitting machine including a movable sinker biased by a torque spring in a direction in which the receiving part approaches the mouth side,
The torque spring is a movable sinker that is arranged between the sinker and the sinker driving member so that one end is supported by the working arm of the sinker and the other end is supported by the tip of the sinker driving member. This is a flat knitting machine.

In the present invention, the torque spring is connected to and integrated with the sinker at a portion supported by the working arm.

Further, in the present invention, the torque spring is connected to and integrated with the sinker driving member at a portion supported by the tip portion, and includes the movable sinker according to

claim

1 or 2. Flat knitting machine.

According to the present invention, the sinker driving member that is displaced so as to switch the sinker between the closed state and the open state supports the other end of the torque spring supported at one end by the working arm of the sinker at the tip. In the closed state in which the tip side of the sinker driving member approaches the tooth opening side, the torque spring can be pressed in the direction in which the working arm of the sinker advances into the tooth opening. Even if the stroke from the open state to the closed state of the sinker increases, the knitting yarn receiving portion provided on the working arm in the closed state reinforces the force that pushes down the knitting yarn by pressing the torque spring by the sinker driving member. A pressing force can be obtained. If there is no pressing by the sinker driving member, the stress of the torque spring is reduced, so that an excessive stress is generated in the open state in order to obtain a sufficient pressing force in the closed state, and the torque spring may be broken. There is. Such a situation can be avoided with a simple configuration in which the tip of the sinker driving member is biased by the other end of the torque spring, and even if the stroke amount of the sinker to advance into the tooth opening is increased, sufficient knitting is achieved. A pressing force against the yarn can be secured.

Further, according to the present invention, the sinker and the torque spring can be integrated to reduce the number of components as a movable sinker, thereby facilitating assembly.

Further, according to the present invention, the sinker driving member and the torque spring can be integrated to reduce the number of components as a movable sinker and facilitate assembly.

FIG. 1 is a partial side cross-sectional view showing a schematic configuration of a flat knitting machine 41 according to an embodiment of the present invention. 2 is a side view and a bottom view showing the configuration of the sinker jack 52 of FIG. FIG. 3 is a side view showing the configuration of the sinker 51 and the wire spring 53 of FIG. FIG. 4 is a side view showing the configuration of the needle plate 45 of FIG. FIG. 5 is a side sectional view showing a schematic configuration of a conventional flat knitting machine 1. FIG. 6 is a side sectional view showing the configuration of the base 4 of FIG. FIG. 7 is a side view showing the configuration of the needle plate 5 of FIG. FIG. 8 is a side view showing the configuration of the sinker 11 and the wire spring 13 of FIG. FIG. 9 is a side view showing the configuration of the sinker jack 12 of FIG. FIG. 10 is a plan view showing a schematic configuration of a drive mechanism used in the flat knitting machine 1 of FIG.

2 Tooth mouth 6 Needle groove 8 Knitting needle 43 Needle bed 45 Needle plate 50 Movable sinker 51 Sinker 52 Sinker jack 53 Wire spring

1 to 4 show a configuration related to the embodiment of the present invention. In each figure, if there is a part corresponding to the description explained in advance, the corresponding part is given the same reference numeral as the description explained in advance, and the duplicated explanation is omitted. There is also.

FIG. 1 shows a schematic configuration of a flat knitting machine 41 according to an embodiment of the present invention. Similarly to FIG. 5, FIG. 1A shows an open state, and FIG. 1B shows a closed state as side sectional views. The flat knitting machine 41 forms a needle bed 43 by arranging a needle plate 45 on the base 4 in parallel. The movable sinker 50 includes a sinker 51, a sinker jack 52, and a wire spring 53. The needle plate 45 has a sinker support portion 45a and a sinker storage portion 45b equivalent to the sinker support portion 5a and sinker storage portion 5b of the needle plate 5 of FIG. 5, but has a configuration corresponding to the spring stopper 5d. Not. The wire spring 53 is not supported by the needle plate 45 at a portion corresponding to the spring stopper 5d, but is supported in contact with the tip end portion 52a of the sinker jack 52. That is, the other end of the wire spring 53 whose one end is supported on the base end side of the working arm 51b of the sinker 51 is supported by the distal end portion 52a of the sinker jack 52 that is a sinker driving member.

For this reason, even if the sinker 51 is in an open state or a closed state, if no load is applied to the knitting yarn receiving portion 51d or the like, one end of the wire spring 53 is supported on the proximal end side of the working arm 51b of the sinker 51. With the supported reaction force, the tip 52a of the sinker jack 52 is pressed from the front side of the tooth mouth 2 side, and the tip 52a is also pressed from the back side via the passive arm 51e of the sinker 51. Even if the stroke amount of the sinker 51 becomes large in the closed state shown in FIG. 1B, the knitted fabric of the tooth mouth 2 can be pushed down with the same pressing force as in the open state.

The sinker 51 is basically the same as the sinker 11 of FIG. 5 and includes a support portion 51a, a working arm 51b, a loop forming portion 51c, a knitting yarn receiving portion 51d, and a passive arm 51e. The curved portion 52b, the butt 52c, and the engaging portion 52e of the sinker jack 52 shown in FIG. 1 correspond to the base portion 12b, the bat 12c, and the engaging portion 12e of the sinker jack 12 shown in FIG. However, in the sinker jack 52, the portion corresponding to the missing portion 12d through which the band 15 penetrates is the flat upper surface 52d of the curved portion 52b. In addition, the sinker jack 52 is not provided with a structure for locking with the wire 16 corresponding to the protrusion 12f of the sinker jack 12, and simply contacts the side wall of the needle groove 6 to increase the sliding resistance. The tail portion 52f is provided for simplification.

In the closed state shown in FIG. 1 (b), the free end of the wire spring 53 supported by the tip 52a of the sinker jack 52 comes close to the tooth opening 2 side. Since the elastic force of the wire spring 53 does not decrease, even if the stroke is increased until the inclined portion 51f of the sinker 51 contacts the sinker stopper 45d of the needle plate 45, a sufficient pressing force can be applied to the knitted fabric. it can.

FIG. 2 shows the configuration of the sinker jack 52 of FIG. FIG. 2A shows a configuration as a side view, and FIG. 2B shows a configuration as a bottom view. The sinker jack 52 is simplified in the configuration near the protrusion 12f of the sinker jack 12 shown in FIG. 9, and is provided with a tail portion 52f. Even when the sinker 51 is in the open state, the wire spring 53 does not bend so much that the spring reaction force does not become excessive. The open state can be sufficiently maintained with a dynamic resistance. Therefore, in FIG. 1, the wire 16 of FIG. 5 is omitted. The band 15 simply restricts the curved portion 52b of the sinker jack 52 with the upper surface 52d, and the configuration corresponding to the lacking portion 12d of the sinker jack 12 is omitted. The sinker jack 12 can also be used.

FIG. 3 shows the configuration of the sinker 51 and the wire spring 53 of FIG. 1 as a side view. In the wire spring 53, the bypass portion 53a and the biasing portion 53b correspond to the bypass portion 13a and the biasing portion 13b of the wire spring 13 in FIG. However, the support portion 53c serving as the free end of the wire spring 53 is less bent than the support portion 13c of the wire spring 13, and extends upward along the passive arm 51e. In the open state of the sinker 51 as described above, the support portion 53c moves to the left together with the tip 52a of the sinker jack 52 of FIG. Therefore, even if the sinker 51 is opened and the urging portion 53b is moved to the left, the wire spring 53 does not bend so much that no excessive elasticity is generated.

FIG. 4 shows the configuration of the needle plate 45 of FIG. 1 as a side view. The needle plate 45 is basically similar to the needle plate 5 shown in FIG. 7 except for the absence of the spring stopper 5d and the wire through hole 5e, such as a sinker support portion 45a, a sinker housing portion 45b, and a band through hole 45c. It has an equivalent configuration.

As shown in FIG. 1, if the free end of the wire spring 53 is brought into contact with the tip end portion 52a of the sinker jack 52, the spring biasing of the sinker 51 against the working arm 51b is essentially unnecessary. Thus, it is possible to reduce the force for energizing the tooth 2 to advance. Even if the sinker jack 52 is rested in the open state, the force for pulling out the sinker jack 52 to the side of the tooth opening 2 is small, so that the sinker jack 52 maintains the resting state by the degree of sliding resistance in the needle groove 6 by the bent portion 52f. can do.

As shown in FIG. 1B, even when the sinker 51 is closed, the support portion 53 c of the wire spring 53 receives a pressing force from the tip end portion 52 a of the sinker jack 52 so as to sufficiently push down the knitted fabric at the tooth opening 2. The sinker 51 can be pushed down by the urging portion 53b. Since the push-down force can be increased simply by advancing the sinker jack 52 toward the tooth opening 2 side, the cam mechanism for driving the sinker jack 52 is rocked as provided in the cam mechanism 30 for operating the sinker. There is no need to provide the cams 32 and 33, and the mechanism can be simplified.

Further, the shape of the wire spring 53 may be different as long as it can generate torque for swinging displacement on the sinker 51. For example, in Patent Document 2, a shape different from that of the wire spring 53 is used in order to integrate the sinker and the torque spring. The torque spring can be integrated not only with the sinker but also with a sinker driving member such as a sinker jack. By integrating, the number of parts constituting the movable sinker can be reduced, and the assembly man-hour can be reduced.

Claims

A plurality of sinkers are arranged in a swingable state on the tip side of the needle bed facing the mouth of the knitted fabric knitting region, each sinker has a working arm that curves and extends toward the mouth of the mouth, and the mouth With the passive arm provided on the side away from the working arm, in the closed state in which the knitting yarn receiving part provided near the tip of the working arm pushes down the knitted fabric in the oral cavity, and in the open state in which the knitting yarn receiving part separates from the oral cavity Can be switched between a displacement in which the tip of the sinker driving member acting on the passive arm approaches the tooth mouth side and a displacement in which the tip is separated from the tooth mouth side. In a flat knitting machine including a movable sinker biased by a torque spring in a direction approaching the mouth side,
The torque spring is a movable sinker that is arranged between the sinker and the sinker driving member so that one end is supported by the working arm of the sinker and the other end is supported by the tip of the sinker driving member. A flat knitting machine.
The flat knitting machine having a movable sinker according to claim 1, wherein the torque spring is connected to and integrated with the sinker at a portion supported by the working arm.
3. The flat knitting machine having a movable sinker according to claim 1, wherein the torque spring is connected to and integrated with the sinker driving member at a portion supported by the tip portion.