KR20140000376U - Circular string knitting machine comprising latch flip prevention unit - Google Patents

Abstract

According to the present invention, the plurality of Maryas needles 8 having the latches 28, which are arranged in the circumferential direction of the hollow core bar 5, are supported to be capable of reciprocating along the axial direction of the core bar 5, A guide 31 for guiding the thread 40 supplied to the maryas needle 8 is a knitting machine 1 installed to rotate about the core rod 5 as a central axis, and the latch 28 of the maryas needle 8 is provided. In the knitting machine in which the guide 31 is arranged at a position where the thread 40 is disposed within the rotation range of the latch 28 of the maryas needle 8 immediately after the latch 28 is removed from the loop in which the loop is knitted last time. It is about.

Description

String-shaped circular knitting machine with latch jumping mechanism {CIRCULAR STRING KNITTING MACHINE COMPRISING LATCH FLIP PREVENTION UNIT}

The present invention relates to a string-shaped circular knitting machine having a latch spring preventing mechanism. Moreover, this invention relates to the circular knitting machine which can operate at high speed in the circular knitting machine which knits the cylindrical string used for the support for hollow porous membranes. This application is Japanese Patent Application No. 2011-098202 for which it applied to Japan on April 26, 2011, Japanese Patent Application No. 2011-185157 for which it applied in Japan on September 26, 2011, and September 6, 2011. On the basis of Japanese Patent Application No. 2011-193803 filed in Japan, priority is claimed, and the content thereof is incorporated herein.

Conventionally, the circular knitting machine which circularly knits a thread and manufactures a string-like thing is known. The circular knitting machine is provided with the outer cylinder which rotates around a hollow core rod, and the outer cylinder is provided with the thread guide guide which guides the thread supplied from a bobbin. A plurality of Maryas needles (or latch needles or Vera needles) projecting from the end face of the outer cylinder along the outer circumferential surface of the core rod are provided to be movable up and down. The thread guide guide guides the supplied thread to a predetermined position of the Maryas needle (see Patent Document 1).

The latch of the Maryas needle is provided with a latch for opening and closing so that the thread fixed in the lowering operation does not fall out. Since this latch needs to be opened to lock the next thread when the Maryas needle is raised, there is a circular knitting machine provided with a latch pressing portion which prevents the latch from closing when the Maryas needle is raised (patent document) 2).

In addition, in recent years, attention to environmental pollution has increased, and regulations on water quality have been tightened, and water treatment using a filtration membrane having excellent separation completeness, compactness, and the like has attracted attention. As such a membrane for water treatment, a hollow porous membrane is used, and not only excellent separation characteristics and permeation performance but also high mechanical characteristics are required for this hollow porous membrane.

As a porous porous membrane excellent in mechanical characteristics, a porous membrane layer is provided on the outer peripheral surface of the support for hollow porous membranes (henceforth simply called a support) which consists of a cylindrical braid, for example, which thread was braided. One hollow porous membrane is known. The hollow porous membrane continuously passes the support through the annular nozzle, discharges the film forming undiluted solution from the annular nozzle, applies the film forming undiluted solution to the outer circumferential surface of the support, and then passes the support coated with the undiluted undiluted solution into the coagulation bath, It is manufactured by solidifying a film forming undiluted | stock solution with the coagulation liquid inside.

Cylindrical zonules as a support are usually manufactured by a brader. In a brader, each thread is drawn out from a plurality of bobbins which are mounted on a flat plate, and the yarns are cross weaved to each other, and each bobbin is moved along a predetermined path to change the positional relationship of the yarns in a predetermined pattern. To make the nuclei.

However, such a brader has a complicated movement of a plurality of small bobbins, and usually, the braiding speed of the cylindrical jaws by the brader is about 10 to 20 m / hr, and the braiding speed is increased further. There is a problem that productivity is low because it is difficult. When productivity is low in this way, the cost of a support body (cylindrical bridge) will rise, and as a result, it will lead to the cost increase of the hollow porous membrane which uses a support body.

As means for improving the productivity, the present inventors, as disclosed in the following Patent Documents 3 and 4, by knitting a knitted braid with a circular knitting, mechanical properties equivalent to the cylindrical joule ( Elasticity (change in outer diameter) by obtaining a support having a higher productivity than that of Joule, and having a cylindrical knitted string passed through a heated heat treatment mold and being heated at a temperature below the melting temperature of the material. Has been found to obtain a cylindrical knitted string support (hereinafter referred to as a knitted string support), and has already proposed a method and apparatus for producing a hollow porous membrane support based thereon.

The outer diameter of the knitted string supporter is determined by the outer diameter of the hollow porous membrane. As for the outer diameter of a hollow porous membrane, 0.9-6.0 mm is preferable and 1.0-3.5 mm is more preferable from the required filtration area in the membrane module which bundled the hollow porous membrane. Therefore, 0.7-5.0 mm is preferable and, as for the outer diameter of a support body, 0.9-3.0 mm is more preferable.

The above-described heat treatment mold has a smaller inner diameter of the outlet than the inlet diameter into which the cylindrical knitted string is introduced, and is the same as the outer diameter of the desired knitted string support. When passing therein, the cylindrical knitted string is heated to thermally contract and the stitch is densified. Therefore, it is necessary to make the outer diameter of the cylindrical string knitted with the circular knitting machine larger than the outer diameter of the desired knitting string support body.

As for the fineness of a yarn, 150-1000 dtex is preferable at the point which improves durability of a hollow porous membrane, and adhesiveness with a porous membrane layer. If the fineness of the yarn is 150 dtex or more, the crushing pressure of the hollow porous membrane is improved, depending on the outer diameter. When the fineness of the yarn is 1000 dtex or less, the decrease in water permeability due to the reduction of the inner diameter is suppressed.

The number of stitches in the cylindrical knitted string is preferably 5 or more per week. The number of stitches is the same as the number of maryas needles (knitting needles) of the circular knitting machine described later. If the number of stitches is 5 or more, the cross-sectional shape of the hollow portion of the knitted string support becomes circular, and the decrease in water permeability due to the reduction of the inner diameter is suppressed.

The upper limit of the number of stitches is determined by the outer diameter of the cylindrical knitted string, the fineness of the thread, the size of the stitch (size of the loop), and the like. When the stitch is large, when the film forming undiluted solution is applied to the knitted string support, the film forming undiluted solution may flow into the inside of the knitted string support and the hollow portion may be blocked. Therefore, when the cylindrical knitted string of the same outer diameter is manufactured, when the fineness of a thread is high, the number of stitches is small, and when the fineness is low, it is necessary to set many stitches.

In the manufacturing method and manufacturing apparatus which this inventors already disclosed, the method of raising the rotation speed of a circular knitting machine to improve productivity is taken in order to improve productivity, and rotation speed may exceed 3000min <^-1> depending on manufacturing conditions. . Generally, the rotation speed of the circular knitting machine which knits a knitting string is 500-1000min <^-1> , The rotation speed of the circular knitting machine in these manufacturing methods and manufacturing apparatus becomes three times or more normally, and the components which comprise a circular knitting machine, especially a Maryas needle And wear deterioration of the cam needle that slides with the maryas needle, and the durability of the circular knitting machine is significantly reduced. In such a case, maintenance frequency such as device stoppage due to component breakage during operation or replacement of parts also increases, leading to a decrease in productivity.

As a means of increasing the rotational speed of the circular knitting machine, Patent Document 5 does not fix a general core rod to rotate the outer cylinder, but instead rotates the cylinder (core rod) for fixing the outer cylinder and arranging the maryas needle, which is the center of the rotating shaft. Thereby, the circular knitting machine which can knit at rotation speed 2500min <^-1> is disclosed.

Japanese Utility Model Application Publication No. 60-193993 Japanese Utility Model Application Laid-open No. 48-89950 Japanese Patent Application Publication No. 2008-114180 Japanese Patent Application Publication No. 2009-052190 Japanese Patent Application Laid-open No. 02-307933

However, when the latch pressing portion of the prior art is provided in the thread guide guide, the weight of the thread guide guide provided in a part of the circumferential direction of the outer cylinder increases by the latch pressing portion, and the dynamic balance deteriorates. As a result, in order to prevent the vibration which arises at the time of rotation, the rotation speed of an outer cylinder can be limited and the braiding speed does not rise, and there exists a subject that productivity falls.

In addition, since the latch hits the latch pressing portion a plurality of times with the rotation of the outer cylinder, there is a problem that the durability of the maryas needle decreases.

Therefore, an object of the present invention is to provide a string-shaped circular knitting machine provided with a latch spring preventing mechanism that can suppress the occurrence of vibration and increase productivity even when the braiding speed is increased.

In addition, even if high-speed rotation was possible by rotating the core rod, the frictional force of the grooves into which the Maryas needle and the Maryas needle and the sliding cam and the Maryas needle are inserted is the same, and the wear deterioration of these sliding parts due to the high speed operation is common. It is the same as the circular knitting machine which rotates an outer cylinder. There is no description of abrasion countermeasures in the disclosed literature, and it is assumed that high speed operation over a long time is difficult as described above.

Moreover, even if the cam side wear can be suppressed, it can be estimated that the wear on the knitting needle batter side with a low hardness becomes faster, and the frequency of replacement of the knitting needle increases, leading to a decrease in productivity.

Therefore, the present invention also prevents abrasion of the components of the circular knitting machine even when the rotational speed of the circular knitting machine is increased, and the circular knitting machine for knitting the cylindrical knitted string used for the support for the hollow porous membrane which can produce the cylindrical knitted string with high productivity. to provide.

This invention has the following forms.

According to a first aspect of the present invention, a plurality of maryas needles having a latch arranged in the circumferential direction of the hollow core bar are supported to be reciprocally movable along the axial direction of the core bar to guide a thread to be supplied to the maryas needle. The guide is a knitting machine installed to rotate around the core rod,

It is a knitting machine which arrange | positioned the said guide in the position where the said thread is arrange | positioned within the rotation range of the said latch of the maryas needle immediately after the latch is removed from the loop in which the latch of the said maryas needle was knitted last time.

According to a second aspect of the present invention, a plurality of Maryas needles disposed in the circumferential direction of the hollow core bar are supported to be reciprocally moved along the axial direction of the core bar, and a guide for guiding a thread to be supplied to the Maryas needle is provided with the core. It is a knitting machine installed to rotate with the rod as the central axis.

It is a knitting machine having a latch pressing portion (also referred to as a latch spring preventing portion or a latch spring preventing mechanism) by the thread between the guide and the position at which the hook of the maryas needle catches the thread.

According to a third aspect of the present invention, an outer cylinder is rotatably supported by a core rod, and a plurality of Maryas needles disposed in a circumferential direction with respect to the core rod are supported by a core rod so as to be movable up and down along an axial direction of the core rod. It is a string-shaped circular knitting machine provided with a thread guide guide for guiding the thread supplied to the Maryya needle which protrudes from the end and moves up and down,

Trying to fix the next thread to the hook within the rotation range (for example, rotation range B in the embodiment) of the latch of the maryas needle immediately after the latch is removed from the loop during the ascending operation and in the descending operation. The guide hole is located on an extension line of the path along the outer circumferential surface of the maryas needle that connects between the locking fixation position (locking fixation range) (e.g., the locking fixation range C in the embodiment) of the hook of the existing maryas needle. It is a knitting machine provided with the said thread guide guide in an outer cylinder.

According to a fourth aspect of the present invention, the position of the guide is set in the range of 45 degrees to 100 degrees from the position of the maryas needle at the top dead center position in the circumferential direction of the core rod toward the rotational direction of the guide. In the up-down direction of the said hook of the said Maryas needle at a top dead center position, it is a knitting machine as described in the said 3rd aspect set in the range of 2 mm upwards and 4 mm downwards from the said hook.

The fifth aspect of the present invention is a knitting machine according to any one of the first to fourth aspects, wherein the number of the Maryas needles is in the range of 5 to 16.

A sixth aspect of the present invention is the knitting machine described in the aspect (5), wherein the bottom circumferential diameter of the guide groove is in the range of 3 to 14 mm.

The seventh aspect of the present invention is the knitting machine according to the sixth aspect, wherein the outer diameter of the knitted fabric is in the range of 3 to 8 mm.

8th aspect of this invention is a knitting machine as described in said 7th aspect which knits the cylindrical knitted string used for the support for hollow porous membranes.

A ninth aspect of the present invention is a knitting machine according to the eighth aspect, wherein the rotation speed of the outer cylinder is set in a range of 1800 to 4500 min ⁻¹ .

A tenth aspect of the present invention includes a plurality of guide grooves for supporting the maryas needle in the longitudinal direction of the outer circumferential surface of the core rod such that the maryas needle is movable up and down along the axial direction of the core rod. Two cylindrical cams for vertical movement are disposed, and a grease containing a solid lubricant is filled in the space portion in the outer cylinder and the respective guide grooves, each of which includes a sliding portion of a cam mount in contact with the cam and the maryas needle. It is a knitting machine in any one of the said 3rd-9th aspect enclosed.

An eleventh aspect of the present invention is the knitting machine according to the tenth aspect, wherein the solid lubricant is selected from the group consisting of organic molybdenum, molybdenum sulfide, PTFE, aluminum oxide, zinc oxide, and cubic boron nitride.

According to another preferred aspect of the present invention, an outer cylinder (for example, the outer cylinder 7 in the embodiment) is rotatably supported by a core rod (for example, the core rod 5 in the embodiment). A plurality of Maryas needles (eg, the Maryas needle 8 in the embodiment), which are disposed in the circumferential direction of the core bar and protrude from the end of the outer cylinder, are latched (for example, the latches in the embodiment ( 28)] a thread that is supported to be movable up and down along the axial direction of the core bar while vertically moving the hook (e.g., the hook 27 in the embodiment), which is opened and closed by the yarn [ For example, in the latch jumping prevention method of the circular knitting machine of the string-shaped thing provided with the thread guide guide (for example, the thread guide guide 31 in embodiment) which guides the thread 40 in embodiment. In the rise, The position at which the hook of the descending Maryas needle hooks the thread while the operation of the latch springs up immediately after the latch of the Maryas needle is removed from the loop (for example, the last loop 36 in the embodiment) during operation. And a thread disposed between the positions of the guide hole (for example, the guide hole 34 in the embodiment) of the thread guide guide and disposed so as to be in contact with the plurality of Maryas needles from the outside.

With such a configuration, the thread itself supplied to the maryas needle can be effectively used to restrict the movement of the latch that springs immediately after the latch is removed from the loop during the raising operation of the maryas needle so that the latch does not close the hook.

In another preferred embodiment of the present invention, the outer cylinder is rotatably supported by the core rod, and a plurality of Maryas needles disposed in the circumferential direction with respect to the core rod are supported by the core rod so as to be movable up and down along the axial direction of the core rod. A string-shaped circular knitting machine provided with a thread guide guide for guiding a thread supplied to the maryas needle which protrudes from the end of the outer cylinder and moves up and down, wherein the latch of the maryas needle immediately after the latch is removed from the loop during an ascending operation In the range (for example, the rotation range B in the embodiment) and the hook fixing position (hook fixing range) of the hook of the hook of the Maryas needle which is in the lowering operation and which the next thread is going to fix on the hook (for example, Along the outer circumferential surface of the plurality of maryas needles connecting between the locking fixing ranges C) in the embodiment A yarn guide of the guide so that the guide groove located on the extension is installed on the outer cylinder.

With such a configuration, the thread itself supplied to the maryas needle can be effectively used to restrict the movement of the latch that springs immediately after the latch is removed from the loop during the raising operation of the maryas needle so that the latch does not close the hook.

Moreover, another preferable aspect of this invention is that when the said outer cylinder is seen from the axial direction, the position of the said guide hole of the said thread guide guide is the said from the position of the said Maryas needle which is in a top dead center position in the circumferential direction of the said outer cylinder. It is set in the range of 45 degrees-100 degrees toward the rotation direction of an outer cylinder, and in the up-down direction of the said hook of the said Maryas needle in a top dead center position, it is set in the range of 2 mm upwards and 4 mm downwards from the said hook. have.

Further, another preferred embodiment of the present invention is a core rod (eg, a hollow cylindrical shape) having a plurality of guide grooves (eg, guide grooves 12 in the embodiment) along the longitudinal direction along the longitudinal direction. Reciprocating motion is performed on the core rod 5 in the form, the Mary's needle (for example, the Mary's needle 8 in the embodiment) accommodated so as to be movable up and down in each of the guide grooves, and the Mary's needle. Two cylindrical cams (for example, upper cam 18 and lower cam 17 in the embodiment) to be provided, and a cylindrical shape that includes the cam and rotates with respect to the core rod together with the cam. A cam mount (eg, a cam mount 18Y in the embodiment) having an outer cylinder (eg, an outer cylinder 7 in the embodiment) and contacting the maryas needle of the cam inside the outer cylinder. Sliding part of the camshaft 17Y] Grease containing a solid lubricant is filled and filled in the space portion (for example, the space portion 39 in the embodiment) to be included and the respective guide grooves of the core rod.

Further, another preferred embodiment of the present invention is a lubricant selected from the group consisting of organic molybdenum, molybdenum disulfide, PTFE, aluminum oxide, zinc oxide and cubic boron nitride.

According to the first and second aspects of the present invention, since the latches can be prevented from using the sequentially supplied yarns, compared with the case where other members are provided in the thread guide guides to prevent the latches from jumping out. In addition, it is possible to reduce the weight of the outer cylinder by simplifying the thread guide guide. Accordingly, the rotation speed of the outer cylinder can be increased, and even if the braiding speed depending on the rotation speed of the outer cylinder is increased, the occurrence of vibration can be suppressed to increase productivity. In addition, the seals that prevent the latch from leaping are supplied with new ones sequentially, so there is no damage to the seals, no need for a separate member, and maintenance is necessary due to the breakage of the latch as compared to the case where a separate member is installed. It can also increase productivity in that regard.

According to the third aspect of the present invention, the jumping of the latch can be prevented by using the yarns supplied sequentially, so that the thread guiding is compared with the case where other members are provided in the thread guiding guide to prevent the jumping of the latch. The guide can be simplified to lighten the outer cylinder. Accordingly, the rotation speed of the outer cylinder can be increased, and even if the braiding speed depending on the rotation speed of the outer cylinder is increased, the occurrence of vibration can be suppressed to increase productivity. In addition, the seals that prevent the latch from leaping are supplied with new ones sequentially, so there is no damage to the seals, no need for a separate member, and maintenance is necessary due to the breakage of the latch as compared to the case where a separate member is installed. It can also increase productivity in that regard.

According to the fourth aspect of the present invention, by setting the position of the guide hole of the thread guide guide to the range of the angle described above, the thread is disposed within the rotation range of the latch that springs up immediately after the latch of the rising maryas needle exits the loop. Since it is possible to reliably prevent the latch from popping up, the thread guide guide can be positioned so that the thread from the thread guide guide can be reliably wound to the outside of the maryas needle, so that the thread can be securely locked to the descending maryas needle. have.

By setting the position of the guide hole of the thread guide guide within the range of the above-described dimensions, the thread can be securely locked to the descending maryas needle, and the latch of the latch springs up immediately after the latch of the rising maryas needle is pulled out of the loop. Since the seal can be disposed within the rotation range, it is possible to reliably prevent the latch from popping up.

According to the fifth to tenth aspects of the present invention, even if the outer cylinder is knitted at a rotational speed exceeding 3000 min ⁻¹ , the parts of the circular knitting machine, in particular, the two cylindrical cams or the Maryas needles can be suppressed to the maximum to minimize the wear of parts and the like. The maintenance frequency can be reduced, and the productivity of the cylindrical knitted string can be improved.

1 is a side sectional view of a circular knitting machine of an embodiment of the present invention.
2 is a perspective view illustrating a change in posture in which the maryas needle moves up and down.
It is a perspective view which shows the principal part of a circular knitting machine.
4 is a perspective view as seen from the reverse direction of FIG. 3.
5 is a perspective view illustrating a state in which a thread is wound around a maryas needle.
It is explanatory drawing which shows the relationship between the rotation range of a latch, and a seal.
7 is an explanatory diagram showing a relationship between a closed latch and a seal.
It is a top view which shows typically the discharge condition of a thread.
9 is an enlarged view of FIG. 1.
10 is a perspective view of a core bar.
11 is a front view of the maryas needle.
12A is an enlarged view of the bat portion of the maryas needle before wear.
It is an enlarged view of the bat part of the maryas needle after abrasion.
13 is a side view of the upper cam and the lower cam.
It is a figure which shows the structure of a circular piece.

Next, embodiment of this invention is described based on drawing. The string-shaped material woven by the circular knitting machine of this embodiment is subjected to heat treatment by passing through a heat treatment die, and further sizing to narrow the outer diameter to a predetermined size to form a support without elasticity. Next, this sized support body becomes a hollow fiber membrane in which the porous membrane layer was formed in the outer side by apply | coating the film formation resin solution on the outer surface. This hollow fiber membrane is modularized and used, for example as a filtration membrane of a water treatment. In addition, although polyester fiber is mainly used for the yarn used as the material of the said support body, the yarn woven by this circular knitting machine is not limited to polyester fiber depending on a use, It is possible to weave various fibers.

1 shows a circular knitting machine of an embodiment of the present invention. The circular knitting machine 1 is provided with the plate-shaped base board 2 fixed to the base. The base plate 2 is formed with a fixing hole 3 fixed to the base at one end side, and an installation hole 4 is formed at the other end side. The hollow core rod 5 is fastened to the installation hole 4 in the state which the lower part was loosened by the two nuts 6 and 6, and is fixed. The core rod 5 protrudes from the upper end of the outer cylinder 7 to be described later, and functions as a central axis of rotation of the outer cylinder 7. Further, the core rod 5 has a function of guiding the string-like material woven in the upper end downward through the inside of the hollow part and a guide of guiding the movement of the up and down direction of the later-described Maryas needle 8. In this embodiment, the size of 16G is used for the maryas needle 8.

The core rod 5 includes a male screw portion 9 in which nuts 6 and 6 are screwed to the lower outer circumference, and a bearing mounting portion 11 for mounting the inner circumferential side of the bearing 10 on the upper outer circumference of the male screw portion 9. In the upper outer periphery of the bearing mounting portion 11, 12 guide grooves 12 for setting the Maryas needle 8 in the circumferential direction are formed in the range from the outer cylinder 7 to the upper end protruding in the circumferential direction. It is. Although the diameter of the groove bottom 13 of the guide groove 12 is 8 mm, in accordance with the diameter of the woven string-like thing, this diameter dimension can use 3 mm or more and less than 12 mm. A total of twelve Maryas needles 8 are arranged in this guide groove 12.

The inner race of the bearing 10 is fitted to the bearing mounting part 11 of the core rod 5, and the bearing 10 is in the state which mounted the end surface on the base board 2. As shown in FIG. The outer cylinder 7 is rotatably attached to the outer race of the bearing 10. In addition, the rotation speed of the outer cylinder 7 is 3000min ^{- 1} , and even if it is 100 hours or more of continuous operation, it is calculated | required that a favorable thing does not stick out.

In the lower part of the outer cylinder 7, a large diameter portion 14 having a larger diameter is formed than the portion above it. A belt groove 15 having a V-shaped cross section is formed on the outer circumference of the large diameter portion 14, and the outer cylinder 7 is rotationally driven over the belt connected to the drive device not shown in the belt groove 15. Here, the lower end surface of the large diameter part 14 enters the spot facing part 16 formed by cutting the upper surface of the base board 2 slightly.

In addition, as the bearing 10, it is preferable to use a double row angular bearing so that the upper part does not cause fluctuation even by a high speed rotation. It is also possible to use a belt with teeth attached instead of belt V.

The lower cam 17 and the upper cam 18 are fixed to the inner peripheral surface of the outer cylinder 7 by the lower screw 19 and the upper screw 20 twisted from the outer peripheral surface of the outer cylinder 7, respectively. Between the lower rim of the upper cam 18 and the upper rim of the lower cam 17 a certain distance is secured as the groove width, and a guide groove 21 having an inner circumferential surface of the outer cylinder 7 as the groove bottom is formed in an elliptical shape. have. The guide groove 21 houses a bat part 22 protruding in the direction in which the latch 28 is opened and closed near the lower portion of the maryas needle 8. The guide groove 21 has a flattened shape, and each of the needles 8 arranged around the core rod 5 moves up and down by rotating the outer cylinder 7. Here, a long hole 23 is formed in the outer cylinder 7, the upper cam 18 is fixed with the upper screw 20 inserted through the long hole 23, and the upper screw 20 is loosened. The groove width (interval "H") of the guide groove 21 formed between the lower cam 17 can be adjusted.

The end plate 24 which forms a part of the outer cylinder 7 in the same diameter as the outer cylinder 7 is attached to the outer cylinder 7 by the fixing screw 29 in the upper end part of the outer cylinder 7. In the state where the end plate 24 is installed in the outer cylinder 7, the upper end of the core rod 5 protrudes from the end plate 24. The end plate 24 has a boss portion 30 inserted between the outer cylinder 7 and the core rod 5. In addition, the end plate 24 is provided with a stopper screw 25 that penetrates the end plate 24 and positions the upper edge of the upper cam 18. The stopper screw 25 is provided with a lock screw 26 for fixing the stopper screw 25 in position. In the state where the position of the upper cam 18 was temporarily fixed with the upper screw 20, the stopper screw 25 was twisted to the required position, and after locking the stopper screw 25 with the lock screw 26, the upper screw ( The upper cam 18 is fastened with 20 to fix the position of the upper cam 18.

The maryas needle 8 is provided with a hook 27 in the upper end, and the hook 27 is a well-known structure by which the latch 28 was opened and closed. Twelve Maryas needles 8 are arranged in the guide groove 12 with the hook 27 facing outward. These Maryas needles 8 are raised and lowered in order along the guide grooves 12 of the core rod 5 by rotating the upper cam 18 and the lower cam 17 together with the outer cylinder 7. Eleven Maryas needles 8 protrude from the upper end surface of the core bar 5.

A rod-shaped, simple and lightweight thread guide guide 31 for guiding the thread supplied to the Maryas needle 8 is fixed to the end plate 24 by twisting the lower threaded portion 32. In this embodiment, the yarn size is 420 dtex. At the upper end of the thread guide guide 31, a thread from a bobbin (not shown) is inserted into the guide hole 34 formed by a separate member. The lock nut 35 is attached to the screw portion 32. In addition, it is preferable that the material of the material which comprises the guide hole 34 uses ceramic in order to suppress abrasion.

Here, since the thread guide guide 31 also rotates with the outer cylinder 7, the angle in the rotation direction to the maryas needle 8 at the top dead center position with respect to the thread guide guide 31 is not changed.

While the thread is fed from the thread guide guide 31 that rotates together with the outer cylinder 7, the yarn is fed to the maryas needle 8 protruding from the core rod 5 so that the yarn is sequentially moved up and down. A new loop 37 is formed downward of the core bar 5 by being fixed to the hook 27 of the hook.

Here, FIG. 2 has demonstrated the form (schematic diagram which shows the knitting operation by the circular knitting machine 1) of the posture change in which one of the Maryas needles 8 moves up and down in order. Here, the one movement of the maryas needle 8 is developed on a plane so as to easily explain. Reference numerals (1), (2), and (3) show the state that the Maryas needle 8 is lowered by the upper cam 18, and reference numerals 5, 6, and 7 denote the lower cam. (17) shows the state in which the Maryas needle 8 is rising.

The loops 36 of the previous time constituting the upper end of the string-shaped object (not shown) are inserted into each of the maryas needles 8. In the posture (1), in the state where the latch 28 is open, the maryas needle 8 starts to descend by the hook 27 locking the thread 40. In the posture (2), the maryas needle (8) is further lowered from the state in which the thread (40) is fixed to the hook (27), and the posture is changed in the direction in which the latch (28) is closed by the last loop (36). . In the posture (3), the latch 28 immediately before exiting from the last loop 36 completely closes the hook 27, so that the thread 40, which is locked, does not exit from the hook 27, and descends. Continue.

In the posture (4), the hook 27 is pulled downward from the last loop 36, and the thread 40 is pulled out. In posture (5), the Maryas needle starts to rise to the outer circumferential side of the previous loop 36 in a state where this time is removed from the previous loop 36. At this time, the thread 40 drawn out in the posture 5 becomes a new loop 37, and the new loop 37 starts to open the latch 28. As shown in FIG. The latch 28 of the maryas needle 8 which rises further in the posture 6 is opened by a new loop 37, and in the posture 7 the maryas needle 8 is hooked with the latch 28 open. (27) is fixed to the thread 40 which is next sent out. Thereafter, the maryas needle 8 is lowered to the posture 1. Here, when shifting from the posture 6 to the posture 7, it operates so that the latch 28 may jump out immediately after the latch 28 is removed from the new loop 37.

From a viewpoint of the knitting operation by the circular knitting machine 1, it can demonstrate as follows.

In the code | symbol 1, the thread 40 is caught by the hook 27. As shown in FIG. In the symbols (2) and (3), the latch 28 is closed by passing the previously looped existing loop 36 while lowering the seal 40, so that the hook 27 is connected to the existing loop 36. It is not caught. In reference numeral 4, the maryas needle 8 is pulled downward from the existing loop 36. Next, as shown by the reference numerals 5 and 6, when the maryas needle 8 rises, the latch 28 is opened by the thread 40 of the newly formed loop 37, and the reference ( In 7), a new loop 37 is formed. By repeating the above operation, the circular knitting is continuously performed to form the cylindrical knitted string A. FIG.

The knitted cylindrical knitted string A passes through the hollow portion 5a (see FIGS. 1 and 2) of the core rod 5 and is discharged downward of the circular knitting machine 1, and is unwound by an unshown unwinder.

As shown in Figs. 3 and 4, the postures of one of the Maryas needles 8 shown in Fig. 2 become the postures of the respective Maryas needles 8 at a certain point in time. 3 and 4 are perspective views of main parts of the circular knitting machine viewed from different directions, and already woven loops are not described for convenience of illustration. As shown in FIG. 3, FIG. 4, when the outer cylinder which is not shown in figure rotates counterclockwise, the core bar 5 will not rotate but a thread guide guide will rotate counterclockwise. In FIG. 3, the protrusion amount gradually decreases and rises between the needles 8 and (b) at the bottom dead center in the counterclockwise direction with respect to the needles 8 and 8 at the top dead center. 8) is located, and the Maryas needle which descends gradually as the amount of protrusion gradually decreases between the Maryas needle (8) (a) at the top dead center and clockwise to the Maryas needle (8) (b) at the bottom dead center. (8) is located.

Here, the thread 40 from the bobbin supplied from the guide hole 34 of the thread guide guide 31 is located at the second position in the counterclockwise direction from the maryas needle 8 (a) at the top dead center position. (8) Hook (27) of the fourth Maryas needle (8) (d) located in the outer side, facing inclined downward from this, and clockwise from the Maryas needle (8) (a) at the top dead center position. ) Is wound so as to be wound around each of the Maryas needles (8). In addition, in FIG. 3, FIG. 4, the attitude | position number of the maryas needle 8 demonstrated by FIG. 2 is described together.

FIG. 5 shows the passage path of the thread 40 which is contacted and excreted to be wound around the plurality of Maryas needles 8. Here, in FIG. 5, only the front-side maryas needle 8 is shown.

In the rising Meriya's needle 8 (c) at the second position in the counterclockwise direction from the Meriya's needle 8 (a) at the top dead center, the thread 40 is the height of the base portion of the latch 28 and the Meriya's. Passing through a position not in contact with the needle 8, the previous loop 36 is just before exiting the latch.

In the rising Meriya's needle 8 (e), which is at the first position in the counterclockwise direction from the Meriya's needle 8 (a) at the top dead center, the thread 40 is lower than the base portion of the latch 28 and the Meriya's. Passing through the position in contact with the needle 8, the last loop 36 is immediately after being released from the latch 28.

In Meriya's needle 8 (a) of top dead center, the thread 40 passes through the position which contacted the vicinity of the center part of the latch 28 in the up-down direction, and the last loop 36 is completely out of the latch 28. As shown in FIG. .

In the descending Meriya's needle 8 (f) at the first position in the clockwise direction from the Meriya's needle 8 (a) at the top dead center, the thread 40 is in contact with the upper and lower center of the latch 28. It passes through the position and is close to the previous loop 36 from the latch 28.

In the descending Meriya's needle 8 (g) at the second position in the clockwise direction from the Meriya's needle 8 (a) at the top dead center, the thread 40 is in contact with the upper and lower center of the latch 28. Through the position, the latch 28 has reached the previous loop 36.

In the descending Maryas needles 8 (h), which are in the third position in the clockwise direction from the Maryas needles 8 (a) of the top dead center, the thread 40 is in contact with the base portion of the latch 28 above. After passing through, the latch 28 rotates in the direction in which the latch 28 closes the hook 27 by the previous loop 36.

In the descending Maryas needles 8 (d) at the fourth position in the clockwise direction from the Maryas needles 8 (a) of the top dead center, the thread 40 is fixed to the hooks 27 of the latches 28. The latch 28 closes the hook 27 completely by the last loop 36.

In other words, if the passage position of the thread 40 is specified at the installation position of the thread guide guide 31, the position of the maryas needle 8 (e) immediately after the latch 28 is removed from the previous loop 36 during the ascending operation. The hook 27 of the maryas needle 8 (d) located in the upper end of the core rod 5 within the rotation range of the latch 28 and the hook 27 is closed and is about to descend is fixed to the thread. The thread guide guide is in the range which connects between positions, and the guide hole 34 of the thread guide guide 31 is located on the extension line of the path | route along the circumferential surface of the some Maryas needles 8, 8, 8 ... 31 is provided in the outer cylinder 7. As shown in FIG.

Here, the position through which the thread 40 passes is the outer side of the maryas needle 8 arrange | positioned so that the thread 40 may be wound as shown in FIG. 5, but as shown in FIG. 6, the thread 40 is shown. This passing range is set within the rotation range B of the distal end base of the latch 28. In other words, by effectively utilizing the thread 40 supplied from the guide hole 34 of the thread guide guide 31 in order to form a new loop 37, the latch 28 of the maryas needle 8 is lifted up during the raising operation. The jumping of the latch 28 that springs immediately after being removed from the loop 36 is prevented.

In particular, in FIG. 5, when the loop 36 immediately before exiting from the latch 28 of the maryas needle 8 (c) is pulled downward from the latch 28 of the maryas needle 8 (e), the latch is latched. Although the spring 28 springs up, this latch 28 is prevented from springing out by the seal 40 (OK) which is located in the rotation range B of the latch 28 and prevents rotation as shown in FIG. do. Therefore, in the seal 40 (NG) which is outside the rotation range B of the latch 28, jumping out cannot be prevented, As shown in FIG. 7, in the state which the latch 28 closed the hook 27, Therefore, when the Maryas needle 8 falls in that state, the hook 27 cannot be locked to the thread 40 (NG).

FIG. 8 is a view of the outer cylinder 7 and the core rod 5 viewed from above in the axial direction, and FIG. 9 is an enlarged view of a main part of FIG. 1.

In FIG. 8, the position of the guide hole 34 of the thread guide guide 31 is the outer cylinder 7 from the position of the maryas needle 8 (a) in the top dead center position in the circumferential direction of the outer cylinder 7. As shown in FIG. Is set in the range of the angle θ (45 degrees to 100 degrees) toward the counterclockwise direction (rotational direction), and the position of the guide hole 34 of the thread guide guide 31 is at the top dead center position. (a) The dimension K of the up-down direction based on the upper end of the hook 27 is set in the range of 2 mm (2 mm upwards) to -4 mm (4 mm downwards) from the hook 27. . In addition, on the line connecting the position of the guide hole 34 of the thread guide guide 31 and the axis of the core rod 5, the distance L between the position of the guide hole 34 and the tangent of the core rod 5 is It is set to 5 mm-8 mm. This value is a value that varies with the length of the latch 28.

Here, the range of the angle θ is more preferably set to 45 degrees to 100 degrees. In the present circular knitting machine described so far, θ = 90 degrees, K = 2 mm, and L = 8 mm are set.

By setting in this way, in particular, the thread 40 itself is prevented from jumping out of the latch 28 released from the previous loop 36, and the next thread 40 is securely locked by the maryas needle 8. Is making it possible.

The above-described numerical range is set so that, if θ is out of the above range, the seal will move out of the rotation range B of the latch 28 in FIG. 6, and thus the latch 28 will be prevented from bouncing off. If the θ is out of the above range, the passing position of the thread 40 immediately after exiting the thread guide guide 31 is inward of the diameter of the guide groove 12 of the core rod 5. When the thread 40 passes through the back surface of the maryas needle 8 rising from the lower part of the thread 40, and it descends after that, it becomes impossible to lock the thread 40 to the hook 27. FIG.

Moreover, when the dimension K of the up-down direction based on the upper end of the hook 27 deviates largely from the said range, the thread 40 will pass through the place higher than the Maryas needle 8, and the hook 27 will be thread 40. If the dimension K is out of the above range, the latch 28 in Fig. 6 is shifted downward from the rotation range B, so that the latch 28 cannot be prevented from sticking out.

And if the distance L is out of the said range to the large side, the diameter of the outer cylinder 7 will become large, the outer cylinder 7 will expand and it will become high speed rotation, and if the distance L is out of the said range to the small direction, the thread guide guide 31 will be made. ) Itself contacts the latch 28.

According to the above embodiment, since the jumping of the latch 28 immediately after exiting the last loop 36 can be prevented by using the seal 40 sequentially supplied, to prevent the jumping of the latch 28. In comparison with the case where other members are provided in the thread guide guide 31, the thread guide guide 31 can be simplified to reduce the weight of the outer cylinder 7. Therefore, the rotation speed of the outer cylinder 7 can be raised (for example, 3000-4000min- ¹ ), the dynamic balance of the outer cylinder 7 is made favorable, and the braiding speed which depends on the rotation speed of the outer cylinder 7 is made. Even if raises, it can suppress the generation of vibration and increase productivity.

In addition, since the thread 40 which prevents the latch 28 from jumping out is sequentially supplied with new one, there is no damage to the thread 40 and no damage to the maryas needle 8. In addition, there is no need for a separate member for preventing the latch 28 from popping up, and there is no need for maintenance due to the breakage of the latch 28 as compared with the case where the separate member is installed, thereby increasing productivity. have.

In particular, the position of the guide hole 34 of the thread guide guide 31 is increased by setting the position of the above-mentioned specific angle on the basis of the position of the maryas needle 8 (a) at the top dead center position. It is possible to place the seal 40 within the rotation range B of the latch 28 springing up immediately after the latch 28 of the needle 8 exits the last loop 36. Therefore, the jumping of the latch 28 can be prevented reliably, and since the thread 40 which exited the thread guide guide 31 can be reliably wound so that it may be wound up to the outer side of the maryas needle 8, it will lower | fall The thread 40 can be reliably locked to the Marys needle 8 to be made.

By setting the position of the guide hole 34 of the thread guide guide 31 to the range of the dimension of the up-down direction of the hook 27 of the maryas needle 8 (a) at the top dead center position, the descending maryas needle ( The rotation range B of the latch 28 which can securely hold the thread 40 to 8) and also jumps immediately after the latch 28 of the rising maryas needle 8 exits the last loop 36. Since the seal 40 can be arranged inside, it is possible to reliably prevent the latch 28 from jumping out.

In addition, this invention is not limited to the said embodiment, Although the angular bearing was used as the bearing 10, the structure which arrange | positions a heat insulation bearing up and down is also employable. In addition, the arrangement | positioning number, size, the thickness of a thread | thread, etc. of the maryas needle 8 are an example, and it is applicable also to the arrangement | positioning number, size, and thickness of thread other than this embodiment.

As also shown in FIG. 10, the core rod 5 is a cylindrical member provided with the hollow part 5a through which cylindrical piece string A passes downward, and the upper end part and the lower end part are formed in the small diameter. A male screw portion 9 in which nuts 6 and 6 are screwed to the outer circumference of the lower end of the core rod 5, and a bearing mounting portion 11 for mounting the inner circumferential side of the bearing 10 to the upper outer circumference of the male screw portion 9. Equipped with. On the outer periphery of the bearing mounting part 11, six guide grooves 12 which set the Maryas needle 8 in the circumferential direction are formed equally in the circumferential direction in the range from the outer cylinder 7 to the upper end which protrudes. . A total of six Mary's needles 8 are disposed in the guide groove 12. The diameter d (hereinafter referred to as bottom circumferential diameter d) of the groove bottom 13 of the guide groove 12 is set in accordance with the outer diameter of the cylindrical piece string A. In this embodiment, the outer diameter of the cylindrical piece string A is preferably in the range of 3 to 14 mm, more preferably 6 to 12 mm.

As shown in FIG. 11, the maryas needle 8 is provided with the hook 27 in the upper end, and the hook 27 is the well-known structure which became openable and closeable by the latch 28. As shown in FIG. The bat part 22 which protrudes in the direction which the latch 28 opens and closes is formed in the vicinity of the lower part of the maryas needle 8. The maryas needle 8 is a thin plate material of about 0.5 mm, and the material is generally carbon tool steel, and the surface hardness after heat treatment is a general one of HRC60 or more. Here, the HRC measuring method is based on JIS Z 2245: 2005.

The size of the hook 27 and the latch 28 is generally represented by gauge "G" and is appropriately selected according to the fineness of the thread 40 to be knitted. In this embodiment, 16G is suitable. Moreover, although the number of the Maryas needles 8 is based also on the open state of the stitch of cylindrical piece string A, 5-16 pieces are preferable and 8-12 pieces are more preferable. In this embodiment, six cases which are the number of the guide grooves 12 of the core rod 5 shown in FIG. In this case, the outer diameter of the cylindrical piece string A obtained by the combination of the bottom circumferential diameter d of the core rod 5 and the number of the Mary's needles 8 is about 3 to 8 mm.

These Maryas needles 8 are disposed in the guide grooves 12 with the hooks 27 facing outwards, and the upper cam 18 and the lower cam 17, which will be described later, rotate together with the outer cylinder 7 to form a bat. The portion 22 is locked between the upper cam 18 and the lower cam 17 to ascend and descend in order along the guide groove 12 of the core rod 5.

As shown in FIG. 13, the lower cam 17 and the upper cam 18 are respectively fixed to the inner peripheral surface of the outer cylinder 7. As shown in FIG. Both the lower cam 17 and the upper cam 18 are formed in a cylindrical shape so that the upper end of the lower cam 17 and the lower end of the upper cam 18 are inclined at a predetermined angle α with respect to the axis of the core rod 5. It is. The upper cam 18 and the lower cam 17 are inclined to face each other, and are disposed above and below with the bat part 22 of the Maryas needle 8 interposed therebetween, and the height of the bat part 22 shown in Fig. 12A " By the lower screw 19 and the upper screw 20 which are kept constant at the interval "H" slightly larger than "h" from the outer circumferential surface of the outer cylinder 7 inside the cylinder of the outer cylinder 7 Each one is fixed. Here, the inclined surface of the lower cam 17 is cut in the reverse direction on the upper end side, and the inclined surface of the upper cam 18 is cut in the reverse direction on the lower end side.

Therefore, between the lower edge of the upper cam 18 and the upper edge of the lower cam 17, a guide groove 21 having an inner circumferential surface of the outer cylinder 7 as the groove bottom is formed in an ellipse shape, and a Maryas needle ( The bat part 22 of 8) is accommodated. Here, a long hole 23 is formed in the outer cylinder 7, the upper cam 18 is fixed with the upper screw 20 inserted through the long hole 23, and the upper screw 20 is loosened. The distance "H" of the guide groove 21 formed between the lower cam 17 can be adjusted.

Further, the angle α is determined by the bottom circumferential diameter d and the vertical movement stroke of the maryas needle 8. When the up-and-down movement strokes of the maryas needle 8 are the same, when the bottom peripheral diameter d becomes small, the angle α becomes small and the inclined surface becomes a steep gradient. Conversely, as the bottom circumferential diameter d becomes larger, the angle α becomes larger and the inclined surface becomes smoother.

At the upper end of the outer cylinder 7, an end plate 24 having the same diameter as the outer cylinder 7 and forming a part of the outer cylinder 7 is provided in the outer cylinder 7 with a set screw 29. In the state where the end plate 24 is installed in the outer cylinder 7, the upper end of the core rod 5 protrudes from the end plate 24. The end plate 24 has a boss portion 30 inserted between the outer cylinder 7 and the core rod 5. In addition, the end plate 24 is provided with a stopper screw 25 that penetrates the end plate 24 and positions the upper edge of the upper cam 18. The stopper screw 25 is provided with a lock screw 26 for fixing the stopper screw 25 in position. In the state where the position of the upper cam 18 was temporarily fixed with the upper screw 20, the stopper screw 25 was twisted to the required position, and after locking the stopper screw 25 with the lock screw 26, the upper screw ( The upper cam 18 is fastened with 20 to fix the position of the upper cam 18.

Therefore, the upper cam 18 and the lower cam 17 also rotate together with the rotation of the outer cylinder 7, and the bat 22 of the maryas needle 8 is placed on the cam mount 17Y of the lower cam 17 accordingly. Therefore, since it rises, the maryas needle 8 rises. Since the bat part 22 of the maryas needle 8 which reached the apex of the lower cam 17 descends along the cam peak 18Y of the upper cam 18, the maryas needle 8 falls. By repeating the above movements, the plurality of Maryas needles 8 arranged on the circumference of the core bar 5 perform reciprocating motion sequentially.

In addition, when the thread 40 to be supplied is released, the thread 40 is released from the hook 27 of the maryas needle 8 and becomes entangled with the maryas needle 8, so that the thread 40 is upstream to give a constant tension. A member for imparting tension, such as a tensor, not shown on the side is provided.

A rod-shaped, simple and lightweight thread guide guide 31 for guiding the thread 40 supplied to the Maryas needle 8 is fixed to the end plate 24 by twisting the lower thread portion 32. In the upper end of the thread guide guide 31, a thread 40 from a bobbin (not shown) is inserted into the guide hole 34 formed by a separate member. The lock nut 35 is attached to the screw portion 32. In addition, the material of the material constituting the guide hole 34 is suitable to use a ceramic in order to suppress abrasion with the seal 40 moving at high speed. This is because when the seal 40 is worn by friction, it may cause thread breakage or yarn fluff.

Here, since the thread guide guide 31 also rotates with the outer cylinder 7, the angle in the rotation direction to the maryas needle 8 at the top dead center position with respect to the thread guide guide 31 is not changed.

As the thread 40 is fed from the thread guide guide 31 rotating together with the outer cylinder 7, the thread 40 is supplied to the Maryas needle 8 protruding from the core rod 5 so as to be wound up, and sequentially up and down. A new loop 37 is formed downward of the core bar 5 by being locked to the hook 27 of the moving maryas needle 8.

Next, the operation of this embodiment will be described.

The circular knitting performed by the circular knitting machine 1 knits a cylindrical transverse meriyas fabric.

As shown in FIG. 14, the lateral Meriya cloth is a spiral of threads 40 continuously formed in a curved loop 37, and each loop 37 is connected to the previous loop 36 up and down. And stitch 38 in loop 37 or loop 36.

When the speed (elevation speed) which knits the cylindrical knitted string A raises, the rotational speed of the outer cylinder 7 of the circular knitting machine 1 according to it will also increase. The rotational speed varies slightly depending on the number of the Maryas needles 8, the bottom circumferential diameter d of the core rod 5, the size of the stitches 38, and the like, but when carried out in a suitable range of the present invention, the unwinding speed is 1.7 m / At min, the rotational speed is about 1800 to 2200 min ⁻¹ . In addition, when the unwinding speed is 3.4 m / min, the rotational speed is about 3000 to 3500 min ⁻¹ . In addition, when the unwinding speed is 4.5 m / min, the rotational speed is about 4000 to 4500 min ⁻¹ .

When the maryas needle 8 rises or falls along the cammount 18Y and the cammount 17Y of the upper cam 18, the lower cam 17, the cammount 18Y, the cammount 17Y and the maryas needle ( In the sliding part of the bat part 22 of 8), friction generate | occur | produces by the contact of metals, and abrasion generate | occur | produces in each sliding part by long time operation. As shown in FIG. 12B, in order to lower the thread 40 when the Maryas needle 8 descends, the tension of the thread 40 is also applied, so that the friction between the upper cam 18 and the bat part 22 is greater. Therefore, the upper wear amount h1 of the bat part 22 tends to be larger than the lower wear amount h2. In addition, in the high speed operation, in addition to the wear of the bat part 22, the wear of the cam peak 18Y and the cam peak 17Y also progresses faster, and the durability (use limit) of the component is also significantly reduced.

In particular, the surface hardness of the cam peak 18Y and the cam peak 17Y greatly affects wear. In the case of continuous operation at a rotational speed of 3000 min ⁻¹ or more using a cam whose surface hardness is less than or equal to HRC50, the wear of the bat 22, the cam mount 18Y, and the cam mount 17Y is marked when the operating time is 300 to 400 hours. Occurs, and in the worst case, breakage of the batt 22 occurs, which causes significant damage to the inside of the circular knitting machine 1 that rotates at high speed.

In addition, even when the surface hardness of the cam acid is larger than or equal to HRC61, especially the hardness of the maryas needle 8, wear of the batt 22 is likely to proceed, and the frequency of exchange of the maryas needle 8 is also increased, resulting in increased productivity. Leads to degradation. As a result of earnest examination by the present inventors, HRC51 or more is preferable and, as for the surface hardness of a cam acid, the range which is HRC55-60 is more preferable. As a result of continuous operation at a rotational speed of about 2000 min ^{- 1} using a cam in this range, wear of the Maryas needle 8, the cam mount 18Y, and the cam mount 17Y hardly occurred even in an operation time of 1000 hours. It turned out that it has sufficient durability. Similarly, as a result of continuous operation at a rotational speed of about 3500 min ^{- 1} , a slight wear was observed on the Maryas needle 8 even at an operation time of 500 hours, but wear of the cam acids 18Y and 17Y occurred almost. We did not do and knew that there was enough durability.

As a method of making the surface hardness of a cam acid into the range mentioned above, heat processing, such as quenching, or coating processing, such as DLC coating and TiN coating, is mentioned, It is more preferable to heat-process.

As the material of the cam, a steel material is used in the case of performing heat treatment, but in order to obtain the above-mentioned surface hardness, carbon steel for machine structure, various tool steels, or the like can be used. The material in the case of performing a coating process is not limited to steel materials, It is possible to use various metals. Examples of the heat treatment include carburization quenching, nitriding, and high frequency quenching.

In addition, the plurality of slit-shaped guide grooves 12 of the core rod 5 similarly wear due to friction because the meridian needles 8 reciprocate. Particularly, since the end portion of the guide groove 12 is knitted, the cylindrical knitted string A is pulled downward through the hollow portion 5a, and therefore the load of the maryas needle 8 arranged on the circumference is applied toward the center direction. Easy to wear

Therefore, it is preferable for the durability improvement that the surface of the core rod 5 and the guide groove 12 also perform the same surface treatment as the cam mount 18Y and the cam mount 17Y.

In addition, the angle α shown in FIG. 13 also affects wear. When the angle α is small, that is, when the inclined surface becomes a steep gradient, the frictional resistance between the bat 22, the cam peak 18Y, and the cam peak 17Y increases, so that wear is likely to proceed. Therefore, the angle α is determined by the bottom circumferential diameter d and the vertical movement stroke of the maryas needle 8, but it is preferable to make it as large as possible.

Further, the Mary's needle inserted into the cam mount 18Y, the cam mount 17Y, and the sliding portion of the bat portion 22 of the mary's needle 8 and the plurality of slit-shaped guide grooves 12 of the core rod 5. Although grease is normally used for lubrication of the sliding part in which (8) reciprocates, roughness which shows the amount of grease applied and the hardness of grease (corresponding to the kinematic viscosity of lubricating oil) is also important for suppressing wear.

In particular, when a small amount of grease is applied to the sliding portions of the maryas needle 8, the upper cam 18, and the lower cam 17, the space portion 39 formed between the outer cylinder 7 and the core rod 5 is provided. The grease present in (see FIG. 1) moves to the inner wall of the outer cylinder 7 by centrifugal force during high speed operation, and lubricates the sliding parts of the maryas needle 8, the upper cam 18, and the lower cam 17. This tends to be insufficient and the progress of abrasion is accelerated. On the other hand, when grease is fully enclosed so that the space 39 may be filled, it will be difficult for the grease to move to the inner wall of the outer cylinder 7 by centrifugal force even at the time of high speed operation, and thus the maryas needle 8 and the upper cam 18 Sufficient lubrication is obtained in the sliding portion of the lower cam 17, and wear of the bat 22, the cam peak 18Y and the cam peak 17Y of the maryas needle 8 can be suppressed.

In addition, the grease softens due to the heat generated by the friction of the sliding portion (the viscosity decreases). When the grease softens, the above-mentioned effects move to the inner wall of the outer cylinder 7 by the centrifugal force during high speed operation, and insufficient lubrication of the sliding parts of the maryas needle 8, the upper cam 18, and the lower cam 17 is insufficient. It is easy to be broken, and the progress of abrasion is accelerated. However, when hard grease with high roughness is used, the resistance of the grease puts a load on each part of the knitting machine and the drive motor, which shortens the life of the apparatus. Therefore, the hardness of the grease is also an important factor in the wear suppression.

The hardness of grease is represented by the NLGI (National Luburicatiing Grease Institute) roughness number described in JISK2220, and the larger the number, the harder the grease. It is preferable to use grease in the range of roughness number "1" to "2" of NLGI for grease of the present invention, and roughness number "2" of NLGI having a mixed roughness range of 265 to 295 (1/10 / mm). It is more preferable to use grease of "No."

The grease is made of low friction on the sliding surface by using organic molybdenum grease, molybdenum sulfide grease, fluorine grease, PTFE-containing grease or ceramic grease containing ultra-fine particles such as aluminum oxide, zinc oxide, cubic boron nitride, etc. Since a lubricating film can be formed and metal contact can be prevented and abrasion and scissor can be reduced, it is preferable to use at the time of high speed operation.

According to the above embodiment, even if the outer cylinder is knitted at a rotational speed exceeding 3000 min ⁻¹ , wear of the parts constituting the circular knitting machine 1, in particular, the upper cam 18, the lower cam 17, and the maryas needle 8 is prevented. By suppressing it as much as possible, the frequency of maintenance such as parts replacement can be reduced, and the productivity of the cylindrical knitted string A can be increased.

In addition, since the cam peaks 18Y and the cam peaks 17Y of the upper cam 18 and the lower cam 17 are surface hardened, the cost is lower compared to the case where the hardness of the entire upper cam 18 and the lower cam 17 is raised. Can get angry.

Next, embodiment of this invention is demonstrated concretely by the following example.

(Measurement of single needle wear)

After the operation, the amount of abrasion of the bat part 22 of the maryas needle 8 was removed by removing the maryas needle 8 from the circular knitting machine 1, and the bat part 22 was observed with a stereo microscope, as shown in Fig. 12B, The upper wear amount h1 and the lower wear amount h2 were measured by the scale (normal).

(Example 1)

Cylindrical knitted string A was manufactured using the circular knitting machine 1 shown in FIG.

As the yarn 40, polyester fiber (fineness: 420 dtex, filament number: 180) was used. As the circular knitting machine 1, a table-type string knitting machine (manufactured by Marui Fiber Machinery Co., Ltd., knitting needles: 12, Meriya's needle size: 16G, bottom circumference diameter d: 8 mm of the core rod, cam hardness: HRC55) was used. Lubricant needles (8), core rods (5), and upper cams of organic molybdenum grease (brand name: Mori FM-L grease (roughness number 2)) of Sumiko Lubricant Co., Ltd. (18) It fully filled and sealed in the space part 39 (refer FIG. 1) with each sliding part of the lower cam 17. As shown in FIG. The unwinding speed of the unwinding machine was 1.94 m / min. The rotational speed of the circular knitting machine 1 at this time was about 2000min ^-1 . The operation was continued until the seal 40 wound around the supply bobbin disappeared, and the operation time was about 100 hours. Immediately after stopping, operation was continued using the new chamber 40, and continuous operation for a total of 3000 hours was performed.

After the end of the operation, the bat part 22 of the whole of the Marys needles 8 was observed with a stereoscopic microscope, and the average value of the combined amount of the wear of the upper wear amount h1 and the lower wear amount h2 was about 0.35 mm, and the height h of the height 22 of the bat part 22 was observed. It was about 12%. Moreover, when the cam peak 18Y and cam peak 17Y used as the sliding part of the upper cam 18 and the lower cam 17 with the Maryas needle 8 were observed, wear was not confirmed.

(Example 2)

A cylindrical knitted string A was manufactured under the same conditions as in Example 1 except that the unwinding speed of the unwinder was 3.4 m / min.

At this time, the rotation speed of the circular knitting machine ¹ was about 3500min ^-1 . The operation was continued for about 50 hours until the seal 40 wound around the supply bobbin disappeared. Immediately after the stop, the operation was continued using the new chamber 40, and continuous operation for the entire 500 hours was performed.

After the end of the operation, the bat part 22 of the whole Maryas needle 8 was observed with a stereoscopic microscope, and the average value of the sum of the abrasion amount of the upper wear amount h1 and the lower wear amount h2 was about 0.41 mm. It was about 14%. Moreover, when the cam peak 18Y and cam peak 17Y which become the sliding parts of the upper cam 18 and the lower cam 17 with the Maryas needle 6 were observed, wear was not confirmed.

(Example 3)

A cylindrical knitted string A was manufactured under the same conditions as in Example 1 except that the unwinding speed of the unwinder was 4.5 m / min.

The rotational speed of the circular knitting machine 1 at this time was about 4500min ^-1 . It operated continuously until the seal 40 wound around the supply bobbin disappeared, and operation time was about 38 hours. Immediately after stopping, operation was continued using the new chamber 40, and continuous operation for a total of 265 hours was performed.

After the end of the operation, the bat part 22 of the whole Maryas needle 8 was observed under a stereoscopic microscope, and the average value of the sum of the abrasion amount of the upper wear amount h1 and the lower wear amount h2 was about 0.46 mm, and the height h of the bat part 22 was measured. It was about 15%. Moreover, when the cam peak 18Y and cam peak 17Y which become the sliding parts of the upper cam 18 and the lower cam 17 with the Maryas needle 6 were observed, wear was not confirmed.

(Comparative Example 1)

A cylindrical knitted string A was produced under the same conditions as in Example 1 except that the filling amount of the lubricant was about 1/5 of Example 1.

The rotational speed of the circular knitting machine 1 at this time was about 2000min ^-1 . When the operation time mentioned above became about 320 hours, since the noise generated from the circular knitting machine 1, operation was stopped.

When the bat part 22 of the whole Meriyasu needle 8 was observed with a stereomicroscope, the average value of the combined amount of the upper wear amount h1 and the lower wear amount h2 was about 1.5 mm, which was about 50% of the height h of the bat part 22. .

(Comparative Example 2)

A cylindrical knitted string A was produced under the same conditions as in Example 2, except that general lithium grease (roughness number 2) was used for the lubricant.

At this time, the rotation speed of the circular knitting machine ¹ was about 3500min ^-1 . The operation was continued for about 50 hours until the seal 40 wound around the supply bobbin disappeared. Immediately after the stop, the operation was continued using the new chamber 40, and a total of 500 hours of continuous operation was performed.

After the end of the operation, the bat part 22 of the whole Maryas needle 8 was observed with a stereoscopic microscope. The average value of the sum of the abrasion amount of the upper wear amount h1 and the lower wear amount h2 was about 1.4 mm, and the height h of the batt part 22 was It was about 45%.

Since the circular knitting machine of the present invention can effectively prevent latch jump, it can be suitably used, for example, in the manufacture of a string-like article.

1: circular knitting machine
5: core rod
7: outer cylinder
8: Maryas Needle
12: Guide Home
18: upper cam
17: lower cam
18Y: Camsan
17Y: Camsan
28: latch
27: hook
39: space part
40: thread
36: loop
34: guide hole
d: bottom circumferential diameter
A: cylindrical shape string
B: rotation range

Claims (11)

A plurality of maryas needles having a latch, which are arranged in the circumferential direction of the hollow core bar, are supported to be reciprocally movable along the axial direction of the core bar, and a guide for guiding the thread to be supplied to the maryas needles guides the core bar. It is a knitting machine installed to rotate about the central axis,
A knitting machine in which the guide is disposed at a position where the thread is disposed within a rotation range of the latch of the maryas needle immediately after the latch is removed from the loop in which the latch of the maryas needle is knitted last time. A plurality of Maryas needles arranged in the circumferential direction of the hollow core bar are supported to reciprocate along the axial direction of the core bar, so that a guide for guiding the thread supplied to the Maryas needle rotates around the core bar. It is a knitting machine installed to
The knitting machine which has the latch press part by the said thread between the said guide and the position where the hook of a Maryas needle catches and fastens the said thread. The outer cylinder is rotatably supported by the core rod, and a plurality of Maryas needles arranged in the circumferential direction with respect to the core rod are supported by the core rod so as to be movable up and down along the axial direction of the core rod, protruding from the end of the outer cylinder to move up and down. Is a circular knitting machine of a string-shaped guide is provided with a thread guide guide for guiding the thread supplied to the Maryas needle,
Maryas connecting between the latch range of the latch of the maryas needle immediately after the latch is released from the loop during the ascending operation and the hooking position of the hook of the maryas needle which is in the descending motion and is about to catch the next thread on the hook. The knitting machine provided with the said thread guide guide in an outer cylinder so that a guide hole may be located in the extension line of the path | route along the outer surface of a needle. The position of the said guide is set to the range of 45 degrees-100 degrees from the position of the said Maryas needle in the top dead center position toward the rotation direction of the guide, and is similar to The knitting machine which is set in the range of 2 mm upwards and 4 mm downwards from the said hook in the up-down direction of the said hook of the said Maryas needle in a point position. The knitting machine according to any one of claims 1 to 4, wherein the number of the maryas needles is in the range of 5 to 16. The knitting machine according to claim 5, wherein the bottom circumferential diameter of the guide groove is in the range of 3 to 14 mm. The knitting machine according to claim 6, wherein the outer diameter of the knitted fabric is in the range of 3 to 8 mm. The knitting machine of Claim 7 which knits the cylindrical knitted string used for the support for hollow porous membranes. The knitting machine of Claim 8 in which the rotational speed of the said outer cylinder was set in the range of 1800-4500min <^-1> . The outer cylinder according to any one of claims 3 to 9, further comprising a plurality of guide grooves for supporting the Maryas needle in the longitudinal direction of the outer circumferential surface of the core rod so as to be movable up and down along the axial direction of the core rod. In the inner space of the outer cylinder and the two guide grooves are arranged, and two cylindrical cams for imparting up and down movement to the maryas needle, the cam and the sliding portion of the cam-mounted contact with the maryas needle, Knitting machine filled with grease containing solid lubricant. The knitting machine according to claim 10, wherein the solid lubricant is selected from the group consisting of organic molybdenum, molybdenum disulfide, PTFE, aluminum oxide, zinc oxide and cubic boron nitride.

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