JP3576664B2 - Electromagnetic selection device for knitting machine and knitting tool control device having the same - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an electromagnetic selection device that uses a permanent magnet and an electromagnet in combination and exerts a strong attraction force with low power, and a knitting tool control device having the same.
[0002]
[Prior art]
In order to perform jacquard knitting in a circular knitting machine, needle selection is necessary, and for that purpose, it is necessary to switch a specific knitting needle to an active or inactive state. For this purpose, an electromagnetic needle selecting device combining a permanent magnet and an electromagnet is widely used. For example, JP-A-6-207352, JP-A-4-289250, JP-B-2-60777, JP-A-62-299554, U.S. Pat. No. 3,518,845, and U.S. Pat. No. 3,283,541 are known. Also, in the devices of U.S. Pat. Nos. 3,518,845 and 3,283,541, a plurality of control electromagnets are arranged to switch the knitting tool to an active or inactive position.
[0003]
[Problems to be solved by the invention]
In the former device using both the permanent magnet and the electromagnet, the magnetic force of the permanent magnet is demagnetized by the electromagnet, and the knitting tool is controlled. Therefore, it is not possible to generate a magnetic force stronger than the magnetic force of the permanent magnet, and to obtain sufficient attraction force, both the permanent magnet and the electromagnet need to be large. It was difficult to mount many.
[0004]
The latter conventional device using a plurality of control electromagnets requires a separate control unit for controlling the knitting tool to the working position and a control unit for controlling the knitting tool to the non-working position. There was a problem that the cost was high.
[0005]
In view of the above, an object of the present invention is to provide an electromagnetic selection device that exerts a strong attraction force with a small amount of power by using an electromagnet having a sufficient attraction force while being relatively small.
[0006]
[Means for Solving the Problems]
Electromagnetic selection device of the present invention is swingably fitted to the swinging piece base metal, and a first rocking piece having a second attaching object portion provided on the right and left ends, the swing piece first, second an electromagnetic selection device for knitting machines ing from the magnet member which selectively adsorbs the adsorption unit, the magnet member has a first coupled with a permanent magnet, in series on both sides of, Ri Do a second electromagnet, each electromagnet, a first located on both sides of the permanent magnet, a second exciting coil, the first located inside and the left and right ends of the exciting coil consists second core and said that you are. Preferably, the first and second attracted portions provided at the left and right ends of the rocking piece have outwardly downward slopes, and the outer end of the permanent magnet has a mushroom-shaped cross section.
[0007]
The present invention also relates to a control device for a jacquard knitted fabric in a circular knitting machine in which a knitting tool is movably mounted, the control of the jacquard knitted fabric in a circular knitting machine in which a knitting tool is movably mounted. An apparatus, comprising: a rocking piece base material mounted in the same groove as the knitting tool and controlling the knitting tool; and at least one rocking piece rockably supported by the rocking piece base material, corresponding respectively to opposite ends of the swinging piece, a magnet member having at least a pair of suction members, and at least one swinging piece Rejingukamu raising the swinging piece, and a control cam for controlling the knitting tools In the control device for a jacquard knitted fabric in a circular knitting machine including an intermediate cam for controlling a swinging piece base material, the magnet member includes a permanent magnet and first and second electromagnets connected in series on both sides of the permanent magnet. Each said electromagnet First positioned on both sides of the permanent magnet, a second excitation coil, wherein the first, and a second core positioned inside and the left and right ends of the exciting coil. The knitting tools are, for example, sinkers, knitting needles (latch needles, compound needles), intermediate members (jacks and the like), hook members, and the like.
[0008]
[Action]
According to the electromagnetic selection device of the present invention, when the first electromagnet attracts the first attracted portion, the second magnetic flux generated by the permanent magnet is interrupted by the second magnetic flux generated by the second electromagnet, and the interrupted permanent magnet Is added to the first magnetic flux generated by the permanent magnet and the first magnetic flux generated by the first electromagnet to generate a stronger magnetic field.
[0009]
On the other hand, when the second electromagnet attracts the second attracted portion, the first magnetic flux of the permanent magnet is interrupted by the first magnetic flux generated by the first electromagnet, and the interrupted first magnetic flux of the permanent magnet is generated by the permanent magnet. In addition to the second magnetic flux and the second magnetic flux generated by the second electromagnet, a stronger magnetic field is generated.
[0010]
According to the knitting tool control device of the present invention, the rocking piece sucked by the suction member based on the pattern information signal is engaged with the rocking piece lasing cam to pivotally support the rocking piece. Extrude with. The rocking piece base material extrudes the intermediate member inserted into the sinker groove inside the rocking piece base material, and raises (moves forward) the intermediate member. The butt of the intermediate member that has risen (advanced) engages with the intermediate member lasing cam, and the intermediate member further rises (advances). The intermediate member raises (advances) the knitting tool inserted into the sinker groove inside the intermediate member. The raised (advanced) knitting tool forms a jacquard knitted fabric.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0012]
As shown in FIG. 1, a thin rocking piece 5 is rockably fitted to a lower portion of the thin rocking piece base material 4 in one groove (not shown). The lower part of the swinging piece base material 4 is a semicircular recess 4e. A circular projection 5e protrudes from the center upper end of the swinging piece 5 so as to correspond to the depression 4e, and the depression 4e and the projection 5e are pivotally connected at a fulcrum. The left and right ends of the swinging piece 5 are symmetrical left and right, forming wedge portions 5c and 5d upward and suction portions 5a and 5b below. A step is provided between the left and right suction parts 5a and 5b and the lower center part.
[0013]
The electromagnetic selection device of the present invention is fixedly provided facing the rocking piece 5. In this device, a permanent magnet 20 is provided in the center, and first and second electromagnets 13a and 13b are provided on both sides of the permanent magnet 20, and each position is fixed by a support member 21 disposed below. Each electromagnet includes first and second excitation coils 131a and 131b located on both sides of the permanent magnet 20, and first and second cores 132a and 132b located inside the excitation coils and at both left and right ends. As shown in FIGS. 2 to 4, the first and second electromagnets 13a and 13b are arranged in series. It is preferable that the distal ends of the first and second cores 132a and 132b are inclined outwards so as to enable large swings. Further, as described later, it is preferable that the outer tip of the permanent magnet has a mushroom-shaped cross section.
[0014]
By applying a positive voltage or a negative voltage to both ends of the wirings of the first and second electromagnets arranged in series, the first and second core portions 132a and 132b of the first and second electromagnets are caused to swing. Are selectively sucked.
[0015]
For example, as shown in FIG. 3, when a positive voltage is applied from A to B, the first magnetic field 20 a by the permanent magnet 20 is interrupted by the magnetic flux generated by the first electromagnet 13 a, and the second magnetic flux 20 b by the permanent magnet 20 The magnetic flux generated by the second electromagnet 13b and the interrupted first magnetic field 20a are added, and a stronger magnetic field is generated. At this time, the second core 132b of the second electromagnet 13b selectively attracts the attracting portion 5b of the oscillating piece 5.
[0016]
Also, as shown in FIG. 4, when a negative voltage is applied from A to B, the second magnetic flux 20b generated by the permanent magnet 20 is cut off by the magnetic flux generated by the second electromagnet 13b. The magnetic flux generated by the first electromagnet 13a and the interrupted second magnetic field 20b are added, and a stronger magnetic field is generated. At this time, the first core 132a of the first electromagnet 13a selectively attracts the attracting portion 5a of the oscillating piece 5.
[0017]
The electromagnetic selection device of the present invention can be used, for example, as a sinker control device of a circular knitting machine.
[0018]
5 to 11 show a main part of the sinker control device according to the first embodiment of the present invention. FIG. 5 shows an arrangement diagram of the cam, the sinker 2, the intermediate member (intermediate jack) 3, the rocking piece base material 4, and the rocking piece 5, and the operating lines 1L and 2L of the knitting needle 1 and the sinker 2.
[0019]
As shown in FIG. 6, a sinker dial 16 is fixed to the upper part of the rotary cylinder 15 of the circular knitting machine, a sinker groove is provided in the upper part of the sinker dial 16 in the radial direction, and the sinker 2 is set in the sinker groove. I have.
[0020]
Above the sinker 2, a yarn carrier 6 (see FIGS. 5 and 6-10) for supplying two types of knitting yarns, a ground yarn GY and a pile yarn PY, in pile knitting to knitting needles is provided. A ground yarn supply port 6a for supplying the ground yarn GY and a pile yarn supply port 6b for supplying the pile yarn PY are fixed to the yarn carrier 6.
[0021]
The sinker 2 slides in the sinker groove in the radial direction by the action of the inner sinker cam 7 and the outer sinker cam 8 attached to the sinker cap 17 corresponding to the sinker dial 16. The sinker 2 has its longitudinal edges 2e and 2d sandwiched between the side ends 7a and 7b of the inner sinker cam 7, and the butt 2a is controlled by a cam track T2 (see FIG. 5).
[0022]
The intermediate member 3 is set in the sinker groove in the outer peripheral direction of the sinker 2. The intermediate member 3 has at least one butt 3a, and sinkers along a cam track T3 (see FIG. 5) formed by the outer sinker cam 8 and the first intermediate cam 10 attached to the opposing sinker caps 17. It slides in the groove in the radial direction.
[0023]
The intermediate member lasing cam 9 (see FIG. 5 and FIG. 10) controls the bat of the intermediate member 3 to a position where the bat is operated and not operated. When the intermediate member lasing cam 9 is in the operation position, the pile or the non-pile can be selected, and only the non-pile is in the non-operation position.
[0024]
As shown most clearly in FIGS. 5 and 12, the electromagnetic selection device according to the present invention is set in the sinker groove in the outer peripheral direction of the intermediate member 3. The rocking piece base material 4 has at least one butt 4a controlled by a cam track T4 formed by the first intermediate cam 10 and the second intermediate cam 11.
[0025]
Opposite to the swinging piece 5, the attracting members 13 a and 13 b (see FIGS. 5 and 7) of the magnet unit are attached to the sinker cap 17. These suction members 13a and 13b selectively suction the suctioned portions 5a and 5b of the oscillating piece 5 based on a signal output from the controller based on predetermined pattern information set in advance. Before the rocking piece 5 enters the suction members 13a and 13b, the rocking piece 5 in a free swing state is horizontally aligned by the inclined surface of the rocking piece canceling cam 14 (see FIG. 5). It is desirable that the swinging piece 5 passes through the suction members 13a and 13b. It is also desirable to use a non-magnetic material for the cancel cam to reduce the leakage magnetic force from the permanent magnet.
[0026]
When the sinker 2 is moved forward, a signal is sent from the controller to the suction member 13b, and the sucked portion 5b of the swinging piece 5 corresponding to the suction member 13b is sucked (see FIG. 7 <cross-sectional view taken along the line BB in FIG. 5). ). By this time, the ground yarn GY has been supplied to the knitting needle 1 from the ground yarn supply port 6a over the sinker top 2f of the sinker 2.
[0027]
After the sucked portion 5b passes through the suction member 13b, the wedge portion 5d of the rocking piece 5 engages with the upwardly inclined portion 12a of the trapezoidal cross section of the rocking piece lasing cam 12, and the rocking piece 5 becomes a rocking piece mother. It is extruded in the center direction of the knitting machine together with the material 4 (see FIG. 7A <C-C cross-sectional view of FIG. 5).
[0028]
The front end 4 b of the extruded rocking piece base material 4 pushes the rear end 3 b of the intermediate member 3. The butt 3a of the intermediate member 3 is engaged with the upwardly inclined portion 9a of the intermediate member lasing cam 9, and the intermediate member 3 is pushed out toward the center of the knitting machine (see FIG. 9A <cross-sectional view taken along line DD in FIG. 5).
[0029]
The rear end 2c of the sinker 2 is extruded by the front end 3c of the extruded intermediate member 3. When the intermediate member 3 reaches the vertex 9b of the intermediate member lasing cam 9, the extruded intermediate member 3 advances the sinker 2 to a position where the pile loop can be formed on the sinker nose 2b (FIG. 10A <E in FIG. 5). -E sectional view>). At this time, the pile yarn PY is supplied to the knitting needle 1 from the pile yarn supply port 6b over the sinker nose 2b of the sinker 2. FIG. 11 (sectional view taken along the line FF in FIG. 5) shows a state in which the pile loop PL is knitted on the sinker nose 2b by the sinker 2 that has advanced.
[0030]
At the vertex 9b of the intermediate member lasing cam 9, it is preferable that the extruded tip of the nose 2b of the sinker 2 is set to move 0.3 mm or more inward from the circumferential operation line of the knitting needle. By setting in this way, a pile loop can be reliably formed at a position 0.3 mm or more away from the tip of the sinker nose 2b.
[0031]
After the intermediate member 3 is pushed out to the position where the intermediate member 3 engages with the intermediate member lasing cam 9 by the rocking piece preform 4, the butt 4 a of the rocking piece preform 4 engages with the downward inclined portion 10 b of the first intermediate cam 10. Then, the rocking piece base material 4 is returned to the non-pile position together with the rocking piece 5.
[0032]
In the above configuration, the intermediate member 3 and the intermediate member control cam may be omitted. In this case, the rocking piece lasing cam 12 pushes the rocking piece 5 together with the rocking piece base material 4, and the rocking piece base material 4 directly pushes the sinker 2.
[0033]
When the sinker 2 is not advanced, a signal is sent from the controller to the suction member 13a, and the suctioned portion 5a of the swinging piece 5 corresponding to the suction member 13a is sucked (see FIG. 7). In FIG. 7, it is not clear which of the sucked members 5 a and 5 b is being sucked by the sucking members 13 a and 13 b due to a limitation in drawing.
[0034]
The swinging piece 5 sucked by the suction member 13a does not engage with the rising slope 12a of the swinging piece lasing cam 12, and the swinging piece 5 passes below the rising slope 12a of the swinging piece lasing cam. Then, the swinging piece 5, the swinging piece base material 4, and the intermediate member 3 move in the circumferential direction without moving in the front-rear direction (see FIGS. 8B, 9B, and 10B). The sinker 2 is controlled only by the sinker cams 7 and 8 without engaging with the intermediate member 3. At this time, even if the pile yarn PY is supplied, the pile loop PL is not formed because it is knitted on the sinker top 2f. The ground yarn GY is supplied to the knitting needle 1 over the sinker top 2f of the sinker 2 together with the pile yarn PY (see FIG. 10B <cross-sectional view taken along line EE in FIG. 5).
[0035]
As described above, by using the sinker control device of the present invention, the pile or non-pile can be selected based on the pattern signal output from the controller, and the uneven jacquard pile knitted fabric can be knitted.
[0036]
In the electromagnetic selection device shown in FIGS. 1-4, the N pole of the permanent magnet is disposed outward and the S pole is disposed inward. However, when this device is employed in a sinker control device of a circular knitting machine, 1 If the polarity is reversed every other feeder, it is possible to prevent residual magnetism generated in the rocking piece. At this time, when the positive voltage or the negative voltage applied to the electromagnet is reversed every other feeder (for example, as shown in FIG. 18, both ends of the first and second electromagnets arranged in series every other feeder are crossed). , Active or inactive control signals from the controller may be in the same polarity direction for each feeder.
[0037]
【The invention's effect】
Table 1 shows the average value of the measurement results of the magnetic flux density of the electromagnetic selection device according to the present invention.
[Table 1]
[0038]
By applying an excitation voltage of −4 volts to the first electromagnet of the present device and degaussing the first attracted portion, the first magnetic flux a generated by the permanent magnet is cut off by the third magnetic flux c generated by the first electromagnet, The first magnetic flux a moves to the second magnetic field and becomes the first magnetic flux a '(see FIG. 14, (2) in Table 1) as compared to the state where no voltage is applied to one electromagnet. Similarly, an excitation voltage of +4 volts is applied to the first electromagnet, and a second magnetic flux b generated by the permanent magnet is induced by the fourth magnetic flux d generated by the first electromagnet, compared with a state in which no voltage is applied to the first electromagnet. Most of the second magnetic flux b moves to the first magnetic field and becomes the second magnetic flux b ′ (see FIG. 15, (3) in Table 1).
[0039]
Next, an excitation voltage of −4 volts is applied to both sides of the first electromagnet of the present apparatus and the second electromagnet connected in series to the first electromagnet to demagnetize the first attracted portion, so that the first magnetic flux a due to the permanent magnet is generated. Is interrupted by the fifth magnetic flux e generated by the first electromagnet, most of the first magnetic flux a moves to the second magnetic field, becomes the first magnetic flux a ′, and further adds the sixth magnetic flux f generated by the second electromagnet. (FIG. 16, (4) in Table 1).
[0040]
When the excitation voltage +4 volts is applied to both ends of the first electromagnet and the second electromagnet connected in series to the first electromagnet, the measured values of (x) and (y) in (4) of Table 1 are interchanged, and the same applies. The result was omitted.
[0041]
Furthermore, as shown in FIG. 17, the cross-sectional shape of the outer end of the permanent magnet was set to a mushroom shape, and the measurement was performed in the same manner as described above (see (5) to (8) in Table 1).
[0042]
As a result, when the cross-sectional shape of the tip of the permanent magnet was a mushroom type, the magnetic flux density was low at the intermediate point, and a higher magnetic flux density was obtained in the first and second attracted portions, which are the needle selecting portions.
[0043]
Thus, the electromagnetic selection device of the present invention generates a strong magnetic field with low power consumption and is compact.
[0044]
According to the knitting tool control device of the jacquard circular knitting machine of the present invention, since a compact electromagnetic selection device is used, the space of the device can be saved. In addition, since the electromagnetic selection device has a strong magnetic field, needle selection errors are reduced.
[0045]
Further, the wedge-shaped wedge portion at the end of the attracted portion of the rocking piece is securely engaged with the rocking piece lasing cam having a trapezoidal cross section. Therefore, the rocking piece engaged with the rocking piece lasing cam does not come off from the rocking piece lasing cam, so that control without erroneous selection is possible. Since the swinging piece does not have a protruding bat, there is almost no danger of the bat breaking even if a control error occurs.
[0046]
Furthermore, since the rocking piece, which is a single type of control member, is controlled, the suction member of the control device can be miniaturized, and since the jacquard pattern is controlled by a computer, a knitted fabric with a wide pattern range can be manufactured. You can do it.
[Brief description of the drawings]
FIG. 1 is a side view of an electromagnetic selection device according to the present invention.
FIG. 2 is a schematic diagram showing a state of magnetic lines of force of the electromagnetic selection device of the present invention when no current is supplied.
FIG. 3 is a schematic diagram showing the state of the lines of magnetic force of the electromagnetic selection device of the present invention when a positive voltage is applied from A to B.
FIG. 4 is a schematic diagram showing a state of magnetic lines of force of the electromagnetic selection device of the present invention when a negative voltage is applied from A to B.
FIG. 5 is an arrangement diagram of a cam, a needle, a sinker, an intermediate member, a rocking piece, and a rocking piece base material showing an embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a sinker control process along the AA cross section in FIG. 5 showing the embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a sinker control process in the BB cross section of FIG. 5 showing the embodiment of the present invention.
8 is a cross-sectional view showing a sinker control process in the CC section of FIG. 5 showing the embodiment of the present invention, FIG. 4a shows pile selection, and FIG. 4b shows non-pile selection.
9 is a cross-sectional view showing a sinker control process in the DD section of FIG. 5 showing the embodiment of the present invention. FIG. 9a shows pile selection, and FIG. 9b shows non-pile selection.
10 is a cross-sectional view showing a sinker control process in the EE cross section of FIG. 5 showing the embodiment of the present invention, FIG. 10a showing pile selection, and FIG. 10b showing non-pile selection.
FIG. 11 is a cross-sectional view showing a sinker control process in the FF cross section of FIG. 5 showing the embodiment of the present invention.
FIG. 12 is a perspective view showing a relationship between a rocking piece canceling cam, a suction member, a rocking piece lasing cam, and a rocking piece and a rocking piece base material in a rocking piece control section.
FIG. 13 is a conceptual diagram of the device of the present invention in a state where no excitation voltage is applied.
FIG. 14 is a conceptual diagram of the device of the present invention in a state where an excitation voltage is applied to the first electrode.
FIG. 15 is a conceptual diagram of the device of the present invention in a state where a + excitation voltage is applied to the first electrode.
FIG. 16 is a conceptual diagram of the device of the present invention in a state where an excitation voltage is applied to both ends of a first electrode and a second electrode.
FIG. 17 is a front view of a permanent magnet used for comparative measurement and having a mushroom-shaped cross-section at the outer end.
FIGS. 18A and 18B show a wiring state according to another embodiment of the present invention, wherein FIG. 18A shows an even feeder, and FIG.
[Explanation of symbols]
1 needle 2 sinker 2b sinker nose 3 intermediate member 4 swinging piece preform 4e recess 5 swinging piece 5a, 5 b the attracted portion d wedge e protrusions 6 yarn carrier 7 the inner sinker cam 8 outer sinker cam 9 intermediate member lasing Cam 10 First intermediate cam 10b Downward inclined section 11 Second intermediate cam 12 Oscillating piece lasing cam 12a Ascending inclined sections 13a, 13b Attraction members 131a, 131b Exciting coils 132a, 132b Core 14 Oscillating piece canceling cam 20 Permanent magnet GY Ground Yarn PL Pile Loop PY Pile Yarn

Claims (4)

Swinging pieces base material (4) swingably fitted in, and, first, rocking piece having a second attaching object portion (5a, 5 b) provided on the right and left end portions (5), the first swinging piece, an electromagnetic selection device for knitting machines from the magnet member ing which selectively adsorbs the second attaching object portion,
The magnet member is a permanent magnet (20), first, second electromagnets (13a, 13b) connected in series on both sides of Tona is,
The electromagnets (13a, 13b) include first and second excitation coils (131a, 131b) located on both sides of the permanent magnet (20), and first and second excitation coils located inside the excitation coils and at both left and right ends. An electromagnetic selector for a knitting machine, comprising two cores (132a, 132b) . First, second the adsorbed portion (5a, 5 b) The apparatus of claim 1, further comprising a downwardly inclined portion in outward direction provided in the right and left ends of the swinging pieces. 3. The device according to claim 1, wherein the outer tip of the permanent magnet has a mushroom-shaped cross section. A control device for a jacquard knitted fabric in a circular knitting machine, to which a knitting tool (2) is movably mounted,
An oscillating piece base material (4) mounted in the same groove as the knitting tool and controlling the knitting tool;
At least one rocking piece (5) supported swingably by the rocking piece base material (4);
Corresponding respectively to opposite ends of the swinging pieces (5), a magnet member having at least a pair of suction members (13a, 13b),
At least one rocking piece lasing cam (12) for raising the rocking piece (5);
A control cam (7, 8) for controlling the knitting tool;
Intermediate cam (10, 11) for controlling rocking piece base material (4)
Jacquard knitted fabric control device in a circular knitting machine consisting of
The magnet member comprises a permanent magnet (20) and first and second electromagnets (13a, 13b) connected in series on both sides thereof.
The electromagnets (13a, 13b) include first and second excitation coils (131a, 131b) located on both sides of the permanent magnet (20), and first and second excitation coils located inside the excitation coils and at both left and right ends. A knitting tool control device comprising two cores (132a, 132b) .