JPH09268455A - Weft-knitting machine equipped with threading tube exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which enables a plurality of knitting yarns to be used with a simplified device constitution in a weft-knitting machine. SOLUTION: Yarn-guiding tubes 10 are delivered and received between the yarn-guiding tube saver 17 which saves idling yarn-guiding tube 10 and the yarn-guiding tube saver 17. Simultaneously, the yarn guiding tube-conveyer 18 which holds the yarn-guiding tube 10 and moves the tube 10 in the longitudinal direction of the needle bed and the yarn-guiding tube 10 are equipped with permanent magnets on its both side faces opposing to the yarn-guiding tube saver 17 and to the yarn-guiding tube conveyer 18 as suction faces. Yarn guiding tube 10 is set so that it is delivered and received between the saver 17 and the conveyer 18. An electromagnet which repels or attracts the permanent magnetic is set to both of the saver 17 and the conveyer 18. The magnetic field repulsing the permanent magnet of the yarn-guiding tube is generated by the electromagnet on the side of delivering the yarn-guiding tube 10, while another magnetic field attracting the permanent magnet of the yarn-guiding tube is generated whereby the yarn-guiding tubes are controlled for exchanging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat knitting machine equipped with a yarn guide tube exchanging device for exchanging a yarn guide tube used for supplying a knitting yarn by utilizing a magnetic force.

[0002]

2. Description of the Related Art In a flat knitting machine, a rail is laid over the needle bed in the longitudinal direction of the needle bed, a member called a carrier is slidably mounted on the rail, and the carrier is driven by a driving means to extend the needle bed longitudinally. By reciprocally sliding in the direction, knitting is performed by supplying a knitting yarn to a knitting needle from a yarn feeder that is held integrally with the carrier. In such a type of knitting machine in which a knitting yarn is supplied by a carrier provided on a rail provided above the needle bed to knit, the number of rails that can be installed is limited due to space problems, and it is inevitable to use it. There is a problem that the number of possible colored threads is limited.

In order to solve the above problems, Japanese Patent Laid-Open No.
According to Japanese Patent No. 174060, a thread guide tube having a cylindrical shape and having a substantially conical shape in a lower portion thereof in a distal end direction is sandwiched by a thread guide fixture configured by a pair of elastic members, and the thread guide tube is provided. Extraction rod guide holes for guiding the extraction rod to be extracted to the transport position are formed between the yarn guide fixtures, respectively, and a yarn guide storage base is arranged to face the front and rear of the yarn storage base. The yarn guide tube extracting means and the yarn guide tube transporting device are configured to be movable in the longitudinal direction of the needle bed by a motor. The yarn guide tube extracting means includes a cam plate rotated by a motor and a crank pin eccentrically fixed to the cam plate in the extraction rod guide hole of the yarn guide tube storage table in which the selected yarn guide tube is held. The extractor rod is driven by the extractor rod driving means including the crankpin to push the yarn guide tube out of the yarn guide tube fixing tool, and the yarn guide tube is provided on the yarn guide tube conveying means to form a pair of jaws from both sides. By pushing it into the yarn guide tube guide groove of the yarn guide holder, the arbitrary yarn guide pipe is moved from the yarn guide fixture to the yarn guide carrier and knitting is performed. This allows
A large number of yarn guide tubes can be used for knitting, and the number of colored yarns that can be used for knitting is dramatically increased.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the yarn automatic supply device disclosed in Japanese Patent No. 74060, a yarn guide tube made of an extraction rod is used to support the yarn guide tube used for knitting and to deliver the yarn guide tube between the yarn guide tube storage stand and the yarn guide carrier. This is performed by a mechanical guide support mechanism such as extraction means and extraction rod drive means. Therefore, the mechanism for transferring the yarn path between the yarn path storage base and the yarn path carrier becomes complicated, and the flat knitting machine itself cannot be increased in size and the manufacturing cost cannot be increased. SUMMARY OF THE INVENTION An object of the present invention is to disclose a flat knitting machine equipped with a yarn guide tube exchanging device capable of simplifying a mechanism for delivering a yarn guide tube.

[0005]

A flat knitting machine equipped with a yarn guide tube exchanging device of the present invention performs knitting by moving a yarn guide pipe that supplies a knitting yarn to a knitting needle on a needle bed in the longitudinal direction of the needle bed. In the flat knitting machine, the yarn guide tube storage means for holding the yarn guide tube in an unused state and the yarn guide tube storage means transfers the yarn guide tube between the yarn guide tube storage means and the yarn guide tube holding means for holding the yarn guide tube in the longitudinal direction of the needle bed. And a yarn guide carrier for moving the yarn guide pipe in both directions, and the yarn guide pipe storing device and both side surfaces of the yarn guide pipe facing the yarn guide carrier are attracting faces, and permanent magnets are attached to the attracting faces to store the yarn guide pipe. And a yarn guide pipe that is passed between the yarn guide pipe conveying device and the permanent magnet and an electromagnet that repels or attracts the permanent magnet are provided in both the yarn guide storage device and the yarn guide pipe conveying device. Generates a magnetic field that repels the permanent magnets of the yarn guide tube on the electromagnet on the side of passing the tube, and receives the yarn guide tube. That the side of the electromagnet is provided a control means for generating a magnetic field for attracting the permanent magnet of the thread pipe.
With this configuration, when the yarn guide tube storing means and the yarn guide tube conveying means are opposed to each other, electricity is applied to the electromagnet on the passing side of the yarn guide tube in a direction in which a magnetic field repulsive to the permanent magnet of the yarn guide tube is generated. By energizing the electromagnet on the side receiving the yarn guide tube in the direction in which a magnetic field that attracts the permanent magnets of the yarn guide tube is generated, the yarn guide tube is generated by both the magnetic force in the attracting direction and the magnetic force in the repelling direction. It is attracted to the electromagnet on the side that receives the opposing thread guide tube.

Preferably, the yarn conduit carrier is provided as part of the carriage. With this configuration, the yarn guide tube moves on the needle bed as the carriage travels, and supplies the knitting yarn to the knitting needle.

[0007] Preferably, drive means for reciprocating the yarn channel storage means along the moving direction of the yarn channel carrier means over the entire length of the needle bed is provided. In this way, by moving the yarn guide tube storing means in advance to a position where the yarn guide tube is delivered, unnecessary movement of the yarn guide tube conveying means is eliminated.

[0008] It is preferable that the yarn tube storage means travels in the same direction as the yarn tube transport means so that the relative speed difference between the yarn tube storage means and the yarn tube transport means becomes small when the yarn tube is replaced. A driving means is provided. With this configuration, when delivering the yarn guide tube, the yarn guide tube is delivered while moving the yarn guide tube storing means in the same direction as the moving direction of the yarn guide conveying means.

Preferably, a plurality of permanent magnets are attached to the attracting surface of the yarn guide tube, and corresponding magnetic poles are provided on the electromagnets of the yarn guide tube storing means and the yarn guide carrier means. By doing so, a force to correct the deviation is generated even for a slight deviation, and the magnetic poles are attracted to each other in a state where they accurately correspond to each other.

Preferably, a positioning means is provided between the yarn channel storage means and the yarn channel conveying means and the yarn channel. By doing so, when the knitting yarn is supplied from the yarn guide tube, the deflection of the yarn guide tube can be prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a flat knitting machine equipped with a yarn path changing device will be described in detail with reference to the drawings. FIG. 1 is a front view of a flat knitting machine 1 equipped with the yarn guide tube changing device of the present invention, FIG. 2 is a view of the flat knitting machine 1 of FIG. 1 from the left side, and FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a block diagram showing the configuration of the yarn guide tube changing device. Front bed 2 of flat knitting machine 1 oppositely arranged
A knitting needle (not shown) is mounted in the needle groove 4 formed on the upper surface of the rear bed 3 so as to be able to slide forward and backward. The knitting needle is reciprocally moved in the longitudinal direction of the needle bed.
It is moved back and forth by the steering wheel cam. Front and rear carriages 5, 6
Are configured to be able to run synchronously by a drive mechanism (not shown).
The flat knitting machine 1 is provided with a known position detecting device including a needle selection gauge 8 provided along the guide rail 7 and a position sensor 9 provided on the carriage, and the position obtained by the position detecting device is provided. Based on the data, the carriages 5 and 6 are moved and the yarn guide tube 10 to be described later is replaced. A cone stand 12 is placed on a thread stand 11 provided above the needle bed, and the cone stand 12 is mounted on the cone stand 12.
3 is placed. Knitting yarn 14 unwound from the yarn cone 13
Is guided to the yarn guide tube 10 via a yarn guide 15 and a tension device 16 provided further above the yarn stand 11, and the knitting yarn 14 is supplied from the tip of the yarn guide tube 10 to a knitting needle for knitting. .

Next, the yarn path replacing device will be described. The yarn guide tube exchanging device includes a yarn guide pipe 10 for supplying a knitting yarn 14 to a knitting needle, a yarn guide pipe storage stand 17 for holding the yarn guide pipe 10 in an unused state, and a yarn guide pipe storage stand 17 A yarn guide tube carrier device 18 for transferring the yarn guide tube 10 between the yarn guide tube 10 and the yarn guide tube 10 and for moving the yarn guide tube 10 over the needle bed gap between the front and rear needle beds;
It comprises a control device 19 for controlling the movement of the yarn path carrier device 18 and the energization of electromagnets provided on both the yarn path carrier device 18 and the yarn path storage stand 17.

In the flat knitting machine of the present embodiment, the yarn guide tube 10 is delivered and received between the yarn guide tube storage stand 17 and the yarn guide tube carrying device 18 by utilizing magnetic force. Any one of the plurality of thread guide tubes 10 held by the reference numeral 17
0 is moved to the yarn guide tube conveying device 18, and the yarn guide tube conveying device 18 holding the yarn guide tube 10 reciprocates on the needle bed gap between the front and rear needle beds by the movement of the carriages 5 and 6. , Supplying the knitting yarn 14 to the knitting needle. Then, after the knitting by the yarn guide tube 10 moved to the yarn guide tube carrier device 18 is completed, the yarn guide tube 10 is transferred from the yarn guide tube carrier device 18 back to the yarn path tube storage stand 17, and again another yarn path is formed. The tube 10 is moved to the yarn path carrier device 18 to continue knitting, and thereafter, the yarn tube 10 is repeatedly transferred between the yarn path storage stand 17 and the yarn path carrier device 18 to perform knitting.

Details of each part of the yarn guide tube changing device will be described with reference to FIGS. 3 and 5. 5A to 5C show an arrow I in FIG.
It is the figure seen in the -I, II-II, and III-III direction. The yarn channel storage table 17 is provided at a position near the needle bed gap on the side of the needle bed, and the yarn channel carrier 18 is provided at a position facing the yarn channel storage table 17 at the same position of the front carriage 5 near the tooth gap. The yarn guide tube storage stand 17 and the yarn guide tube transporting device 18 are provided with electromagnets 20 that cooperate with a permanent magnet 30 attached to the yarn guide tube 10 which will be described later to transfer the yarn guide tube 10.
In the present embodiment, the electromagnet 20A is provided in the yarn tube carrier device 18, and the three electromagnets 20 are provided in the yarn tube storage stand 17.
B, 20C, and 20D are provided along the moving direction of the carriage. As shown in FIG. 3, the yarn guide tube transporting device 18 is supported and fixed to the tip of a bracket 21 that extends from the front carriage 5, and the knitting yarn insertion port 22 of the yarn guide tube 10 is held forward and backward while holding the yarn guide tube 10. It is provided so as to be located on a virtual center line W between both needle beds. On the other hand, the yarn guide tube storage stand 17 is provided at the end of the bracket 24 protruding from the base 23 of the knitting machine at a position facing the yarn guide tube carrying device 18 on the front carriage 5.

Since the electromagnet 20A of the yarn tube transporting device 18 and the electromagnets 20B, 20C and 20D of the yarn tube storage stand 17 have the same structure, the electromagnet 20A will be described below as an example with reference to FIGS. FIG. 6A is an arrow IV-IV of FIG. 5A.
FIG. 6B is a cross-sectional view as seen in the direction of FIG.
Direction, FIG. 6C is a cross-sectional view as seen in the direction of arrow VI-VI.
6D is a diagram showing a state in which the yarn guide tube 10 is removed from FIG. 6C. As shown in FIGS. 5 and 6, the electromagnet 20A includes an iron core 25 made of electromagnetic soft iron (SUYP), an exciting coil 2
By winding 6 and switching the energization direction to the exciting coil 26 by the control device 19, it is possible to generate a magnetic field of any polarity on the magnetic pole 27 at one end of the iron core 25. The electromagnet 20A is provided with a positioning engaging portion 28 that serves as a positioning means and is adapted to the shape of the yarn guide tube 10. The yarn guide tube 10 is housed in the engaging portion 28 so that the yarn guide at the time of delivery of the yarn guide tube. Positioning of the tube 10 and prevention of runout of the yarn guide tube 10 during knitting are performed.

Next, details of the yarn guide tube 10 are shown in FIG. Figure 7
7A is a front view, FIG. 7B is a side view, FIG. 7C is a top view, and FIG.
[Fig. 4] is a partially enlarged view of a suction surface portion. The yarn guide tube 10 is preferably a non-magnetic material, and is a substantially cylindrical member having a knitting yarn insertion hole 22 formed therein, and the yarn guide tube storage base 17 and The attraction surface 29 is opposed to the magnetic poles 27 of the electromagnets A, B, C, and D of the yarn guide carrier 18.
Are provided on both sides. As shown in FIG. 7D, the attraction surface 29 is attached so that the S pole of the permanent magnet 30 appears on both attraction surfaces 29. By attaching the permanent magnets 30 so that the same S pole appears on both of the attracting surfaces 29, the yarn guide tube 10 held by the yarn guide tube transporting device 18 becomes
The yarn guide tubes 10 do not attract each other when passing through a position facing the other yarn guide tube 10 held by the yarn guide tube 1.
0 will not accidentally fall off from the thread pipe storage stand 17.
However, it is not always necessary that the same polarity appears on both adsorption surfaces 29.

In the course of exchanging the yarn guide tube 10,
The control device 19 controls the movement of the carriages 5 and 6 provided with the yarn path transporting device 18 on the basis of the position data obtained from the position detecting device, and causes the yarn path transporting device 18 to move.
0 is moved to a position facing the electromagnet of the yarn guide tube storage stand 17, and the yarn guide carrier 18 and the electromagnet of the yarn guide storage stand 17 face each other with the yarn guide tube 10 interposed therebetween. The attracting surface 29 of the yarn guide tube 10 is attached to the electromagnet on the delivery side of the tube 10.
An energization command in a direction in which a magnetic field that repels the permanent magnet 30 attached to the yarn guide tube 10 is generated, and a magnetic field that attracts the permanent magnet 30 attached to the attracting 29 surface of the yarn guide tube 10 is generated in the electromagnet on the side receiving the yarn guide tube 10. Then, the yarn guide tube 10 is delivered by issuing a direction energization command.

Next, the operation of the above-described embodiment will be described with reference to FIG. When the knitting is started, the carriages 5 and 6 stopped outside the knitting area on the left side of the needle bed shown by the broken line in FIG. 1 are moved from the control device 20 based on the colored yarn data obtained from the knitting program. It is moved in the direction of arrow R according to the command. When the yarn guide tube 10b held by the electromagnet 20B is used for knitting, at the position before the electromagnet 20A of the yarn guide tube conveying device 18 reaches the position opposite to the electromagnet 20B of the yarn guide tube storage stand 17, the yarn guide tube conveyance is performed. The electromagnet 20A of the device 18 and the electromagnets 20B, 20 of the thread tube storage stand 17
Power is not applied to C and 20D, and the yarn guide tubes 10b and 1
Nos. 0c and 10d are iron cores 25 of electromagnets 20B, 20C, and 20D by permanent magnets 30 attached to attraction surface 29.
Has been adsorbed on. The carriages 5 and 6 move further to the right, and the electromagnet 20A of the yarn path transporting device 18 is converted to the electromagnet 20B based on the position data obtained from the position detecting device.
When it is recognized that the position facing the
0b is transferred from the thread tube storage stand 17 to the thread tube carrier device 18, and an energization command is sent from the control device 19 to the thread tube carrier device 1.
No. 8 electromagnet 20A and the yarn tube storage stand 17 electromagnet 20
Sent to B. In order to move the yarn guide tube 10b from the electromagnet 20B to the electromagnet 20A, the energization command in the direction in which the magnetic field that repels the yarn guide tube 10b is generated is applied to the electromagnet 20B that holds the yarn guide tube 10b and passes the yarn guide tube 10b. But the yarn guide tube 10
An energization command in a direction in which a magnetic field that attracts the yarn guide tube 10b is generated is issued to the electromagnet 20A that receives b. That is, in the electromagnet 20B, the S pole permanent magnet 30 of the attracting surface 29 of the yarn guide tube 10b is energized in the direction in which the S pole is generated in the magnetic pole 27, and in the electromagnet 20A, the S surface of the attracting surface 29 of the yarn guide tube 10b is S. The permanent magnet 30 of the pole is energized in the direction in which the N pole is generated in the magnetic pole 27. As a result, a force in the direction of repulsion from the electromagnet 20B and a force in the direction of being attracted by the electromagnet 20A act on the yarn guide tube 10b, and the yarn guide tube 10b exists at a position facing the yarn guide tube storage stand 17. Thread guide carrier 1
8 and the engaging portion 2 for positioning the electromagnet 20A.
It is stored in 8. At this time, since both the repulsive force and the attractive force of the electromagnet and the permanent magnet are used for delivery, the electromagnet 20 of the yarn tube storage stand 17 and the yarn tube transporting device capable of delivering the yarn tube 10b. The allowable range of displacement between the 18 electromagnets 20 is wider than in the case of using a mechanical guide support mechanism. Therefore, the yarn guide carrier 18 is installed in the yarn guide storage table 1
It is of course possible to replace the yarn guide tube 10 in a state in which it is stopped at a position facing the electromagnet 20B of No. 7, and the carriages 5 and 6 travel when the electromagnet 20A passes through the position facing the electromagnet 20B. Thread tube 1 without stopping
It is also possible to pass 0.

After the movement of the yarn guide tube 10b to the yarn guide tube conveying device 18 is completed, the energization of the electromagnets 20A and 20B is released, but the permanent magnet 30 of the attracting surface 29 causes the yarn guide tube 10b to move to the electromagnet 20A. The iron core 25 is held in a state of being adsorbed. As a result, the thread guide tube storage stand 1 for the thread guide tube 10b is provided.
When the delivery from 7 to the yarn guide carrier 18 is completed and the carriages 5 and 6 move on the needle bed, the tip of the knitting yarn insertion hole 22 of the yarn guide 10b held in the yarn guide carrier 18 is completed. The knitting yarn 14 is supplied from the knitting needle to knitting. At this time, the positioning engaging portion 28 formed on the electromagnet 20
As a result, the run-out of the yarn guide tube during traveling of the carriage is prevented, the knitting conditions are kept constant, and a knitted fabric with a uniform texture can be knitted.

The description has been made up to the point where the yarn guide tube 10 is moved from the yarn guide tube storage stand 17 to the yarn guide tube transporting device 18 for knitting, but the knitting of the yarn guide tube 10b is completed and the yarn guide tube 10b is completed. When returning the yarn from the yarn guide carrier 18 to the yarn guide storage stand 17, a magnetic field repulsive to the yarn guide 10b is generated by the electromagnet 20A of the yarn guide carrier 18 in the opposite manner to the above. The electromagnet 20B of 17 is energized in a direction in which a magnetic field for attracting the yarn guide tube 10b is generated, and the yarn guide tube 10b is returned to the electromagnet 20B of the yarn guide tube storage stand 17.

<Modification 1> Next, another embodiment of the flat knitting machine having the yarn guide tube exchanging device will be described. In the above-described embodiment, the thread guide tube storage stand 17 is fixed to the side of the needle bed, but in the first modification, as shown in FIG. 8, the thread guide is provided on the guide rail 41 provided above the rear bed 40. While holding the pipe storage base 42 slidably, the belt 45 and the yarn guide pipe storage base 46, which are laid between the pulleys 43 and 44 provided at both ends in the longitudinal direction of the needle bed, are connected by a connecting member 47, and the pulley 44 is connected. By being driven by the motor 48, the yarn guide tube storage base 42 is configured to be movable along the guide rail 41 provided in the needle bed longitudinal direction over the entire area in the needle bed longitudinal direction, and the position of the yarn guide tube storage base 46 is set. On the basis of the position data obtained from the position detection device for detecting the yarn and the knitting data obtained from the knitting program, the yarn guide tube 48 to be used next for knitting is moved to the vicinity of the exchange point, and at the time of handing over the yarn guide pipe. On the thread pipe storage stand 7 is moved in the same direction as the movement direction of the yarn path transporting device 50 provided on the front carriage 49, or is run in synchronization with the yarn path transporting device 50, and the yarn transporting device 50 transfers the yarn pipe 48. The difference between the two speeds when passing through the opposing position to the yarn tube storage stand 46 for performing is reduced. This allows
It is possible to transfer the yarn guide tube without increasing the deceleration rate of the moving speed of the carriage 50 or without decelerating it, and it is possible to suppress a decrease in knitting efficiency. Further, it is not necessary to move the carriage to the outside of the knitting area each time the yarn guide tube is replaced, and the knitting can be restarted immediately after the replacement of the yarn guide tube, so that the reduction of the knitting efficiency due to the replacement of the yarn guide tube can be suppressed. .

<Modification 2> In Modification 2, a plurality of combinations of magnetic poles of permanent magnets and electromagnets are arranged on the attraction surface at intervals. FIG. 9 shows a case where two sets of permanent magnets and magnetic poles are arranged, and FIG. 10 shows an example where four sets are arranged. In the structure shown in FIG. 9, two permanent magnets 52 and 53 are provided at upper and lower portions of the yarn guide tube 51 at intervals, one of which is an S pole and the other of which is an N pole.
The electromagnet 54 is arranged so that the poles appear on the attracting surface, and the electromagnet 54 that attracts the yarn guide tube 51 bends the iron core 55 into a U-shape, and the magnetic poles 56 and 57 at both ends of the bent iron core are respectively formed into the yarn guide tube. The attraction surface 58 is provided at a position corresponding to the permanent magnets 52 and 53. Further, in FIG. 10 (FIG. 10 is a perspective view schematically showing the arrangement of permanent magnets and electromagnets attached to the suction surface of the yarn guide tube), a plurality of them are provided on the same suction surface 61 of the yarn guide tube. The permanent magnets 62, 63, 64, 65 of the two are attached, and the magnetic poles 68, 69, 7 of the two electromagnets 66, 67 are correspondingly attached.
0 and 71 are provided. Generally, when magnetic poles are attracted to each other, the magnetic cores are attracted in a state where the central portions of the magnetic force face each other, and when the magnetic force centers are deviated, a force is generated to move the magnetic force centers to be attracted to each other. . When the magnetic poles become large, the central portion of the magnetic force also inevitably becomes large. Therefore, even if there is some deviation, the magnetic poles are held in a state of being attracted to each other without generating a force in the direction of correcting the deviation. On the other hand, if the magnetic poles per set become smaller,
The central portion of the magnetic force becomes smaller, and a force to correct the slight displacement is generated. Therefore, in order to improve the positional accuracy in the direction in which the yarn guide tube transport device moves when the magnetic poles of the permanent magnet and the electromagnet are attracted, it is sufficient to reduce the length of the yarn guide tube transport device in the moving direction. In order to improve the positional accuracy of the pipe in the vertical direction, the length may be reduced in the vertical direction. Therefore, rather than providing a set of permanent magnets and electromagnet magnetic poles in combination, a plurality of sets of permanent magnets and electromagnet magnetic poles are provided instead of reducing the adsorption points of the permanent magnets and electromagnets per set. Positioning accuracy is improved. The shape and arrangement of the magnetic poles of the permanent magnets and electromagnets can be determined in consideration of the weight of the yarn guide tube, the strength of the magnetic force of the permanent magnets and electromagnets, the required positional accuracy, and various conditions such as attractive force. desirable.

In each of the above-described embodiments, the case where the exciting coil of the electromagnet is wound by a unifiler to switch the energizing direction to the exciting coil to perform attraction and repulsion has been described. It is also possible to use a bifilar as the winding method and switch the polarity of the magnetic poles by switching the exciting coil to be energized instead of the energizing direction to the exciting coil.
Further, in the above-described embodiment, the yarn guide tube transporting device is configured as a part of the carriage. However, the belt is stretched between a pair of pulleys provided at both ends of the moving area of the carriage, and both end portions of the belt needle bed are It is configured so that it can be driven to rotate by a drive motor attached to a pulley provided on the above, and a yarn guide carrier is provided on a guide rail provided in the longitudinal direction of the needle bed above the needle bed gap between the front and rear needle beds. The knitting may be carried out by holding the thread guide tube slidably, fixing the belt and the yarn guide tube conveying device by a connecting member, and rotating the motor to cause the yarn guide tube conveying device to run in synchronization with the carriage. It is possible.

[0024]

As described above, in the flat knitting machine equipped with the yarn guide tube exchanging device of the present invention, one of the permanent magnets of the yarn guide tube is arranged with the yarn guide tube storing means and the yarn guide tube conveying means facing each other. By generating a magnetic field that repels the magnet and the other magnetic field that attracts the permanent magnet of the yarn guide tube, the yarn guide tube is delivered using both the repulsive force and the attractive force of the electromagnet and the permanent magnet. Therefore, it is not necessary to provide a mechanism for mechanically guiding and supporting the yarn path between the yarn path storage means and the yarn path transport means, and the structure of the knitting machine can be simplified. In addition, by using both the repulsive force and the attractive force of the electromagnet and the permanent magnet to deliver the yarn guide tube, the yarn guide tube is displaced when it is moved between the yarn guide tube conveying means and the yarn guide tube storing means. Therefore, even if there is some misalignment between the yarn path transporting means and the yarn path storage means, the yarn path can be delivered and the yarn path can be delivered reliably. It will be possible.

Further, when the yarn guide tube conveying means is provided as a part of the carriage, it is not necessary to additionally provide a moving means for the yarn guide tube conveying means, and the construction of the knitting machine can be simplified.

Further, when the driving means for reciprocating the yarn guide tube storing means along the moving direction of the yarn guide tube conveying means over the entire length of the needle bed is provided, the yarn guide tube storing means is previously set. By moving the yarn guide tube to a position where it is delivered, wasteful movement of the yarn guide carrier can be eliminated and the yarn guide tube can be replaced efficiently.

Further, when the yarn path is replaced, the yarn path storage means is run in the same direction as the yarn path carrier means so that the relative speed difference between the yarn path storage means and the yarn path carrier means becomes small. When the drive means is provided, the yarn guide tube can be delivered even when the carriage is moving at a high speed by making the yarn guide storage table run in the same direction as the yarn pipe carrier device or in synchronization with each other during the delivery to reduce the speed difference. This makes it possible to suppress a decrease in knitting efficiency due to replacement of the yarn guide tube.

When a plurality of permanent magnets are attached to the attraction surface of the yarn guide tube and magnetic poles corresponding to the permanent magnets are provided on the electromagnets of the yarn guide tube storage means and the yarn guide carrier means, Even if there is a slight deviation between the center of the magnetic pole of the permanent magnet and the center of the magnetic pole of the electromagnet, a force is generated to move the centers of the magnetic poles to correspond to each other, so that the yarn guide tube is always held at the same position. It is possible to prevent changes in knitting conditions due to delivery of the yarn guide tube.

When a positioning engagement portion is provided between the electromagnets of the yarn guide tube storing means and the yarn guide tube conveying means and the yarn guide tube, the yarn when the knitting yarn is supplied from the yarn guide tube is provided. It is possible to knit a high-commercial-value knitted fabric in which the deflection of the conduit is prevented, the knitting conditions are stable, and the texture is uniform.

[Brief description of drawings]

FIG. 1 is a partial front view of a flat knitting machine of the present invention.

FIG. 2 is a side view of the flat knitting machine of FIG. 1 viewed from the left side.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a block diagram showing a configuration of a yarn guide tube changing device.

5A is a view as seen in the direction of arrow I-I in FIG. 3, FIG. 5B is a view as seen in the direction of arrow II-II in FIG. 3, and FIG. 5C is a view as seen in the direction III-III in FIG.

6A is a sectional view taken along arrow IV-IV of FIG. 5A, FIG. 6B is a sectional view taken along arrow VV of FIG. 5B, and FIG. 6C is a sectional view taken along arrow VI-VI of FIG. 5B. And FIG. 6D
FIG. 6B is a view of FIG. 6A and FIG. 6B with the yarn guide tube removed.

7A is a front view of the yarn guide tube, FIG. 7B is a side view, FIG. 7C is a top view, and FIG. 7D is a partially enlarged view of a suction surface portion.

FIG. 8 is a view of the flat knitting machine of Modification 1 of the present invention as seen from above.

FIG. 9 is a diagram showing a second modification of the present invention.

FIG. 10 is a diagram showing a second modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat knitting machine 5 Front carriage 6 Rear carriage 10 Thread guide tube 17 Thread guide tube storage 18 Thread guide carrier 19 Control device 22 Knitting thread insertion hole 25 Iron core 26 Excitation coil 27 Magnetic pole 30 Magnet

Claims (6)

[Claims] 1. A flat knitting machine for knitting by moving a yarn guide tube for supplying a knitting yarn to a knitting needle on a needle bed in the longitudinal direction of the needle bed to store a yarn guide tube which holds a yarn guide tube in an unused state. Means and a yarn path storage means for transferring the yarn path between the means and the yarn path storage means, and a yarn path conveying means for holding the yarn path and moving it in the longitudinal direction of the needle bed; And a yarn path which is passed between the yarn path storage means and the yarn path transport means, with permanent magnets attached to the attraction surfaces on both sides facing the device and the yarn path transport means. At the same time, an electromagnet that repels or attracts the permanent magnet is provided in both the yarn guide tube storage means and the yarn guide carrier means, and a magnetic field that repels the permanent magnet of the yarn guide tube is generated in the electromagnet on the side of passing the yarn guide tube. In addition, a magnetic field for attracting the permanent magnet of the yarn guide tube is generated in the electromagnet on the side receiving the yarn guide tube. Flat knitting machine provided with a thread pipe replacement device, wherein a control means is provided for. 2. A flat knitting machine equipped with a yarn guide tube exchanging device according to claim 1, wherein the yarn guide tube conveying means is provided as a part of the carriage. 3. A drive means for reciprocating the yarn tube storage means along the moving direction of the yarn tube transport means over the entire length of the needle bed. A flat knitting machine equipped with the yarn guide tube exchanging device according to the above paragraph. 4. The yarn guide tube storing means is run in the same direction as the yarn guide tube conveying means so that a relative speed difference between the yarn guide tube storing means and the yarn guide tube conveying means becomes small at the time of exchanging the yarn guide tube. A flat knitting machine provided with the yarn path changing device according to claim 3, further comprising drive means. 5. A plurality of permanent magnets are attached to the attracting surface of the yarn guide tube, and magnetic poles corresponding to the permanent magnets are provided on the electromagnets of the yarn guide tube storing means and the yarn guide tube conveying means. A flat knitting machine provided with the yarn path replacing device according to claim 4. 6. The yarn guide tube storing means and the yarn guide tube transporting means are provided with positioning engaging portions corresponding to the shape of the yarn guide tube, according to any one of claims 1 to 5. A flat knitting machine equipped with the yarn guide tube exchanging device according to item.