JPS62110954A - Cam holder of traverse knitting machine and knitting machineequipped with said cam holder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cam holder for flat knitting transport as described in the general concept in claim 1.

Such a cam holder is known, for example, from French Patent No. 2438.
No. 105, this known cam holder has four sections or chutes along its length, each having a specific function. There are two knitting sections in the center of the cam holder and a transfer section at each end of the cam holder that is used to perform stitch transfer. The cam holder is mounted on a carriage and is configured to operate with an electronically controlled individual slider selection system that moves the needles forward or backward to loop, sink, or transfer with each pass of the carriage. can perform the following actions. However, when the needles are in knitting (loop-forming or sinking) operation, the transfer section must be skipped. That is, the lengths of the cam holders corresponding to these transfer sections are not utilized during the travel of the carriage. Furthermore, the presetting required for transfer is performed at the end of the forward stroke of the cam holder, and the transfer is performed during the first stroke of the cam holder. Furthermore, the section position in the cam holder must be taken into account during selection programming.

Similar cam holders are DE-B-1760025 and P
It is also known from the specification RA-2075791.

Cam holders have also already been proposed with a single type of section or chute that can perform all the required functions, in particular the transfer function, while advancing or retracting in both directions of movement of the cam holder carriage (GB-A-
No. 2106940). However, since this cam holder includes a large number of movable cams that operate under control, it requires the same number of control devices.

In particular, it involves a number of pairs of cams that are alternately activated and deactivated and must be controlled by a stop at the end of the stroke, and operates over a constant carriage stroke. There are many cases where part of the journey is not used. Also, needle control is centralized at the same level, with the needle butt supporting all of the forces necessary for needle movement. Therefore, the possibility of damage increases depending on the type of operation, especially when operating at high speed.

The object of the invention is to provide a single type of section or chute which, like the above-mentioned known examples, can perform all the required functions, but with a minimum number of control cams, at high speed and with a variable carriage stroke. power to operate,
The purpose is to realize the holder.

This object is achieved by the cam holder of the invention as defined in claim 1.

In this cam holder, only the transfer cam passing the loop is controlled. The movement is performed by the cooperation of the slider and needle. Since the slider selection cams are arranged separated by a wide space, the slider between the cams can be easily selected without fear of damage. There is no need to secure the passage of the slider butt by a controlled cam, and the nod itself secures the passage by means of a retractable cam.

The invention also relates to a flat knitting machine as defined in claim 5.

1 and 2 show a flat knitting machine comprising two grooved plates 1 and 2 forming a dihedron and in whose grooves needles and sliders or needle bushings cooperating with these needles are arranged. Auxiliary groove plate 3.4 at the bottom of each groove plate 1゜2
is fixed, and the auxiliary groove plate 3.4 forms a right angle with the main plate and includes an auxiliary slider cooperating with the slider of the groove plate 1.2, which auxiliary slider extends along the rails 8, 9 to the groove plate 1. ．．
It cooperates with an electromagnetic selector 5.6 which is integral with the carriage 7 moving on 2 and which is equipped in principle with two cam holders. Details of selectors 5 and 6 can be found in Swiss Patent No. 63202
It is stated in No. 4. The auxiliary slider is attached to a spring and has a fork that engages with the rear end of the main slider.
During the selection of the main slider, the auxiliary slider is initially pressed down by the cam, but is not held by any element of the selector and rises under the action of the associated spring to drive the corresponding main slider. The selection cam of the cam holder drives the butt of the main slider.

The cam holders 10, 11 also include an electromagnetic device 12 which controls the transfer cam so that it projects above the cam holder in the activated state and retracts into the cam holder in the inactive state.
, 13. As this device, for example, a suitable device disclosed in Swiss Patent No. 635378 can be adopted.

Two embodiments of the cam holder as shown in FIG. 2 have one kickover cam and four selectors 6.

The cam holder as a first embodiment as shown in FIG. 3 has a first slider selection cam 14 disposed at the center of the cam holder.
, a second selection cam 15 and a third selection cam 16 arranged on both sides of the selection cam 14 and spaced apart from the selection cam, two automatic retraction sink cams 17 arranged between the selection cams on both sides of the selection cam 14, 18. Two automatic retractable stitch transfer cams 2 arranged on each side of the selection cam 14
1 , 22 , two slider knockover cams 23 , 24 arranged on both sides of the selection cam 14 , transfer cams 23 , 24 arranged above the selection cam 14 in the center of the cam holder and that can be cleared by the selector 12 or 13 Cam 25, this transfer.

A needle (
Needle passing the loop) Butt passage 27 above the cam 2
Cam Cap 26, Cam Camp 26 limited with 5
Two known knockover cams 2B and 29, and a knockover cam 28, respectively arranged on both sides of the
, 29, respectively. The three cams 14, 15,
16 is a fixed cam, and only the transfer cam 25 is controlled.

The cams, which are automatically retractable by means of sliders, are provided with ramps 17a, 18a, 19a, 20a, respectively.
21a and 22a. When the butt of a selected slider hits one of said ramps, it causes the corresponding cam to
By compressing the spring to which this cam is attached, it can be pushed into the cam holder and moved along a trajectory without being driven by this cam. The cams 15 and 16 are also provided with ramps 15a and i6a, respectively, but these cams are fixed cams, so the ramps are not for retracting the cams, but for selecting after the auxiliary slider is released by the selector. This is a ramp formed to pass the butt of the slider that was not installed.

The needle 32 and slider 33 are shown in cross section on the left side of the drawing. That is, it is shown in a lower position than its actual position and in an inactive position. The actual positions of the needles and sliders are shown only for one of these butts 32a, 33a, respectively. The positions of the selectors 6 are relative to the symmetry axes 34, 35, 36, 37 of these selectors and the first three pawls 38, 39, 40 of each selector.

41, respectively. These nails are covered by Swiss Patent No. 63
The purpose is to keep the unselected sliders in a low position, as described in the '2024 patent.

Note that the cam portions 19b, 20b, and 25a are recessed portions.

The cams 19 and 20 have slider butts 33 at their outer ends.
a, strictly speaking, has notches L9c and 20c for passing the lower half of these bathos 1-, and the upper part located at a lower level than this has a cam when sinking, as is clear from Fig. 5. It passes above 19 or 20.

The cam 25 is provided at each end with a safety lamp 25b, 2sc, respectively, to prevent damage to the butt of the needle in the event that the needle collides with the end of the needle transfer cam 25.

The illustrated cam holder is located at the center of the selection cam 14 and the needle.
It includes an axis of symmetry A passing through the center of transfer cam 25.

In general, a cam holder consists of several sections (chutes), such as the section shown, which is represented in the drawings by two dashed lines B, C, which are also the axis of symmetry between two adjacent sections.
It is shown by .

The number of sections or chutes set from end to end is limited only by the length of the knitting machine.

The various possibilities of section selection in the illustrated cam holder are explained below in connection with FIGS. 3 to 6.

FIG. 3 shows the hunt trajectory of the slider that performs the transfer operation and the needle that cooperates with it, and the loop transfer needle 32' is located in the rear groove plate and is driven by the rear cam holder shown at the top of FIG. 3. In contrast, the loop receiving needle 32 cooperates with the front cam holder shown at the bottom of the drawing. It goes without saying that the rear cam holder is the same as the front cam holder, and the cams belonging to it have a dash ('
) with the same reference numbers. However, it is possible to reverse the function, that is, mirror image reversal of Figure 3, and this means that it is possible to perform mouth-to-mouth transfer in both forward and backward directions, that is, from left to right and from right to left. It means that you can. In the illustrated example, it is assumed that the carriage moves in the direction of the arrow from right to left. Slider 33' is selected in front of selection cam 15', and this selection cam 15' and cam 1
%y according to trajectory a by 7', 18'? Jl and finally synced by the sync cam 24'. The associated needle 32' is driven by the slider 33' and then passes into the passage 27', performing the transfer according to the normal trajectory. In the front groove plate, a needle 32 receives the loop.
A slider 33 that cooperates with is selected in front of the selection cam 14, and the butt of this slider moves along the trajectory Jc.
is lifted up by the cam 21 and pushes the cam 21 as it passes. It is then lifted by the cam 22. A needle 32 associated with this slider is driven by the slider according to a trajectory d, and its butt then
The camera moves to the cam 25 and receives the transferred eye. Slider 33
is driven rearward by needle 32 and its butt pushes against retraction cam 18 before being sunk by cam 24.

If the slider is not selected, its butt 33a is buried in the groove of the groove plate and is not driven by the selection cam according to the trajectory 1ffe, as shown in FIG. In this case, the butt 32a of the cooperating needle follows a trajectory ", ie, this needle is not activated.

If the needle has to sink, its slider is selected in front of the selection cam 14 (FIG. 5).
. The butt is driven by cams 14, 22 and 18 and pushes cam 20 as it passes along trajectory g. The associated needle is driven by this slider following a similar trajectory, with the needle transfer cam 25 being cleared.

If the needle has to perform a loop-forming movement, a slider is selected in front of the selection cam 15 and its butt is driven by said cam 15 and cams 17, 19 according to the trajectory i. The associated needle follows a trajectory j similar to trajectory i, and in this case, the needle transfer
Cam 25 is cleared. The needle is then driven by cam 26, and the slider is driven by knockover cam 29 and slider sink cam 24, respectively.

When the carriage moves in the opposite direction, selection is made at 36 for transfer and sink operations and at 37 for loop forming operations.

A second embodiment of the cam holder shown in FIG. 7 has a first selection cam 43 placed at the center of the cam holder for slider selection, and second selection cams 44 placed on both sides of the selection cam 43 at an appropriate distance from this cam. and 3rd i! tR cam 4
Contains 5. The selection cam 43 consists of two parts: a fixed lower part in the form of a trapezoid, and a movable triangular upper part that can move in the transverse direction when it hits the slider butt, that is, in the opposite direction from right to left. The other two selection cams 44, 45
are fixed cams, but each has a ramp 44a, 45a, which does not prevent the cam from being retracted, but rather an auxiliary slider is released by a selector, as described in Swiss Patent No. 632,024. This is a ramp that allows the butts of the sliders that were not selected to pass through after being selected.

Two sink cams 47, 48 are arranged on three sides of the selection cams 43, 44, 45, on both sides of the central selection cam 43. These cams are automatically retracted by a slider, for which purpose ramps 47a, 48a are respectively formed. Cams 4 are mounted on both sides of the movable cam 46.
Two transfer cams 49 and 50 are fixedly installed, which also serve as restraining pieces for the transfer cams 6 and limit the stroke thereof. A triangular cam 51 is pivotally mounted on the cam holder directly above the selection cam 43 and transfer cams 49, 50.
The pivoting cam 51 is integral with a support 52 set back from the cam 51, allowing the cam 51 to oscillate about an axis passing through the apex of the triangle. In the non-actuated state, the cam 51 occupies the position shown in FIG. 8, in which the underside of the cam 51 is horizontal. The slider swings from one side to the other under the action of the butt, and this swing is prevented by two restraining pieces 53 and 54 arranged on both sides of the support 52.
limited by. Above the pivot cam 51 is a device 12.
or a transfer cam 55 that can be cleared by 13 and a passage 5 for guiding the butt of a transfer needle (loop transfer needle) with said cam 55
A fixed cam camp 56 is arranged to limit the number of cams.

Knockover cams 58 are provided on both sides of the cam cap 56,
Two known alignment cams 60 .
6+ is provided. Therefore, in this embodiment, there are only two pairs of retraction cams instead of six pairs as in the first embodiment. As a result, noise is significantly reduced.

The needle 32 and slider 33 are shown in cross-section on the left side of the drawing in a lower and non-actuated position than their actual position. The actual position of the needle and slider is each butt 3.
Only 2a and 33a are shown.

The position of the selectors 6 is the axis of symmetry 34.3 of these selectors.
5 , 36 , 37 and the first three claws 3 of each selector
The said pawls, indicated at 8°39, 40, 41, are intended to hold the unselected auxiliary sliders in a lower position, as described in Swiss Patent No. 632,024.

The illustrated cam holder includes a selection cam 43, a pivoting cam 51,
It includes an axis of symmetry A passing through the center of transfer cam 55 and cam camp 56. In general, the cam holder consists of a plurality of chutes similar to the sections shown, which are indicated in the drawings by two dashed lines B and C, which are also the axes of symmetry between two adjacent sections. The number of sections or chutes that can be set from end to end is limited only by the length of the knitting machine.

The various possibilities for selecting the sections of the illustrated cam holder are explained below with reference to FIGS. 7 to 1O.

FIG. 7 shows the butt trajectory of the slider and the needles associated with it during the stitch transfer operation, in which the loop transfer needle 32' is located in the rear groove plate of the knitting machine and is driven by the rear cam holder shown in the upper part of FIG. whereas the loop receiving needle 32 cooperates with the front cam holder shown at the bottom of the drawing. The rear cam holder is of course identical to the front cam holder, and the cams have been given the same reference numerals with the addition of a Danoché ('). However, it is possible to reverse the action or mirror the image in Figure 7.
This means that in the forward or backward direction u (1) transfer movements can be carried out as well from left to right or from right to left. In the illustrated embodiment, the carriage moves from right to left, That is, it is assumed that the slider 33' moves in the direction of the arrow.First, the slider 33' is selected by +'+ii- of the selection cam 44', and the selection cam 44' and the sink are moved along the trajectory "a". .

The cam 47' is driven to a height where it comes into contact with one of the inclined surfaces of the pivoting cam 51' which pivots around the point R1'i. Needle 32 that cooperates with this slider
' is driven by the slider and then passes into the passage 57' for transfer according to the normal trajectory "b". As the needle descends into the passageway 57', the needle slides into the slider 33.
' is driven rearward, and this slider is finally synced by the sink cam 63'.

In the front groove, the slider 33 associated with the loop receiving needle 32 is actuated for the first time in position 35 just before the central 5'A IR cam 43. The hat first comes into contact with the rounded lower edge of the transfer cam 49 and pushes the triangular movable cam 46 horizontally to the right, so that the butt of the slider rises along this cam 46 and transfers to the second transfer cam. 50 and a movable cam 46 at the end of said cam 50.
comes into contact.

During this rise, as will be described later, in the other groove,
The pivot cam 51, which is also used when forming a loop, is pushed by the butt of the slider 33 and pivots, allowing the needle to pass along the trajectory "d" under the drive of the slider, and then the bar 71- Move to the edge. When retracting, the needle 32 drives the slider 33, the needle butt 32a pushes the ramp 48a of the sink cam 48,
Eventually, it is knocked over by the knockover cam 63.

By utilizing the pivoting cam 51, the number of cams can be reduced by omitting the two tack cams, and fixed cams 49, 50 can be employed.

Therefore, the configuration becomes simple.

If the slider is not selected, the slider 33a is buried in the groove of the groove plate and is not driven by the selection cam according to the trajectory "eo" as shown in FIG. 8. In this case,
The butt 32a of the associated needle follows a trajectory "f". [
! 11, this needle does not work.

FIG. 9 shows a slider that operates in sync and a needle that cooperates with the slider. In this case, the slider is selected in front of the central selection cam 43, and its hat 33a is lifted by this cam 43 and the movable cam 46, moves to the right, and moves to the cam 5.
0 and disengages from the pivot cam without passing through. The transfer cam 55 is retractable, and the needle hat 32a following the trajectory "h" is pushed away by the cam 55, the butt does not come into contact with the inclined ramp 48a of the sink cam 48, and this cam 4B causes the needle hat 32a to follow the trajectory "g". ” is diverted to. The needle then moves to the knockover 59 and the slider is knocked over by the knockover cam 63. If the carriage moves in the opposite direction, cam 46 is pushed to the left and pivot cam 51 swings in the opposite direction.

Figure 10 shows the trajectory of the slider "i" and the trajectory of the needle that cooperates with this when the needle performs a loop forming operation.
j''. In this case, the slider is pre-selected in front of the selector cam 44 and lifted by this cam 44 and the sink force 1.47 to drive the associated needle according to the trajectory "j".Transfer - The cam 55 is in a non-operating state, that is, a retracted state. When the butt 33a' of the slider comes into contact with the left inclined surface of the pivoting cam 51, the cam 51 pivots up to the stopper piece 54, and as a result, the slider Ascending along the pivoting cam 51, the associated needles are driven in a loop-forming motion.The needles then move up and down the cam cap 5
6 and then down along the knockover cam 59, driving the slider that has been knocked over by the knockover cam 63.

If the carriage moves in the opposite direction, the selection is 36 and roof for sighting and sinking.

37 for formation, respectively.

[Brief explanation of drawings]

Fig. 1 is a sectional view schematically showing the groove plate of the flat knitting machine; Fig. 2 is a side view schematically showing the carriage in the flat knitting machine shown in Fig. 1; Fig. 3 shows the needle trajectory during stitch transfer operation. A plan view of two first embodiment cam holders; FIG. 4 is a plan view showing the trajectory of the slider and needle in one of the cam holders when not in operation; FIG. 5 is a plan view showing the slider in the same cam holder during loop sinking operation and Mi of the needle
ff; FIG. 6 is a plan view showing the trajectory of the slider and needle during loop forming operation in the same cam holder; FIG. 7 is a plan view of two second embodiment cam holders showing the needle trajectory during stitch transfer operation. Figure 8 is a plan view showing the trajectory of the slider and needle during non-operation in one of the cam holders of the second embodiment; Figure 9 is a plan view showing the trajectory of the slider and needle during loop sinking operation in the same cam holder FIG. 10 is a plan view showing the trajectory of the slider and needle during the loop forming operation in the same cam holder. 1.2... Groove plate, 5.6, 12.13... Electromagnetic selector, 7... Carriage, 10.11... Cam holder, 14, 15, 16... Selection cam, 17, 18・
... Automatic retraction sink cam, 19, 20... Evening, ri, cam,

Claims (1)

[Claims] 1. Slider selection cam (14, 15, 16; 43, 44
, 45), a slider knockover cam (23, 24; 62, 63) that drives the slider by its butt.
, and a knitting cam (28, 29; 58, 5) whose butt drives the needle pushed by the selected slider.
9) and needle transfer cam (25:55)
A cam holder for a flat knitting machine in which each of the cams described above is configured so that the needle can sink, form a loop, or transfer stitches while moving forward or backward in both moving directions of the cam holder, the central first slider selection cam (14; 43
), and can be cleared by the control device (13),
At least one needle transfer cam (25; 55) having an axis of symmetry (A) passing through the center of the needle transfer cam (25; 55), which together with the fixed cam (26; 56) forms in a known manner the passage (27; 57) of the loop passing needle butt. On each side of the axis of symmetry (A) there is another slider selection cam (15, 16; 44, 45), a retractable sink cam (
17, 18; 47, 48), transfer or receiving cam (
21, 22; 49, 50), and all of these retraction cams are placed between a slider selection cam and a sink cam having a ramp that allows automatic retraction of the selected slider through the butt. A cam holder for a flat knitting machine characterized by being arranged so that not only a loop forming operation but also a sinking operation can be performed within the same section, and stitch transfer can be performed while moving forward or backward in both moving directions of the carriage. 2. Each section comprises a transversely movable cam (46) movable on either side of the axis of symmetry and a central pivoting cam (51) located above said central selection cam (43). The cam holder according to scope 1. 3. The center selection cam (43) has a trapezoidal shape, and the transversely movable cam (46) is pushed by the butt of the slider to move the transfer cam (49, 50) along the top side of the center selection cam (43). The cam holder according to claim 1, wherein the cam holder is a triangular cam that moves between the triangular cams. 4. Claim 3, characterized in that the pivoting cam (51) has a triangular shape and is mounted so as to be able to pivot between the two restraining pieces (53, 54) about its apex. Cam holder described in . 5. Two mutually opposing groove plates (1, 2), each equipped with its own slider and containing a coordinating needle;
and slider selectors (5, 6) that move on the groove plate and can select not only the cam holder but also the slider individually and continuously during the movement of the cam holder carriage (7).
), wherein the cam holder is constructed and arranged so that the needles can be operated in sinking, looping or transferring operations in both directions of movement of the carriage, or in an inactive state. slider selection cams (14, 15, 16; 43, 44, 45), knockover cams (23, 24; 62, 63), and knitting and needle transfer cams (25, 26, 2
8, 29; 55, 56, 58, 59), and is configured such that the slider can be driven by a selection cam selected by a selector among selection cams occupying various positions of the cam holder. The center of the central first slider selection cam (14; 43) and can be cleared by the control device (13) and fixed cam (26;
56), in a known manner, with at least one section having an axis of symmetry (A) passing through the center of the needle transfer cam (25; 55) forming the passage (27; 57) of the loop-passing needle butt. together with another slider selection cam (15, 16;
44, 45), retractable sink cam (17, 18; 4
7, 48), transfer or receiving cam (21, 22; 4
9, 50) by placing all of these retraction cams between a slider selection cam and a sink cam having a ramp that allows them to be automatically retracted by the butt of the selected slider. A flat knitting machine characterized in that it is capable of not only a loop forming operation but also a sinking operation within the same section, and is capable of transferring stitches while moving forward or backward in both directions of movement of the carriage. 6. It is claimed in claim 5 that each section of the cam holder comprises a transversely movable cam movable on either side of the axis of symmetry and a central pivoting cam (51) located above said central selection cam (43). Flat knitting machine described in.