JPH0941248A - Select jack lowering device in weft knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an interval between knitting locks of a carriage by alternately changing appearance and disappearance of two cam faces, which are brought into contact with butts of select jacks, respectively during right and left movement of the carriage and act so as to lower the select jacks, from a cam fitting plate by linking the appearance and disappearance to the right and left movement directions of the carriage and by using a compact cam device for lowering the select jack. SOLUTION: This select jack lowering device in weft knitting machine comprises select jack lowering cams which are brought into contact with butts of select jacks of knitting needles during right or left knitting of a carriage and lower the select jacks to initial positions, a select jack lowering cam equipped with a rotary support between both the cam faces, a select jack lowering cam fitting means for forming a revolving shaft holding the rotary support of the select jack lower cam within the thickness of a cam fitting plate and a cam changing means for changing the revolving direction of the select jack lowering cam to exchange the cam face acting on the select jack.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a select jack lowering cam for a flat knitting machine for lowering the select jack of the knitting needle to the initial position before selecting the knitting needle when knitting the knitting fabric by the flat knitting machine. It relates to the device.

[0002]

2. Description of the Related Art A conventional select cam lowering cam device for a flat knitting machine is shown in FIG. First, in FIG. 7A, a groove cam plate 100 having two groove cams with shanks arranged in a line is provided on a carriage so as to be movable left and right, and each groove cam 101,
A select jack lowering cam 103 slidably on the 102,
It is configured that one or the other select jack lowering cam appears and disappears by engaging 104 and moving the groove cam plate 100 to the left and right. One of the two select jack lowering cams 103, 104 abuts on the butt of the select jack of the knitting needle to lower the select jack to the initial position at the time of leftward knitting of the carriage, and the other acts at the time of rightward knitting of the carriage. It contacts the butt of the select jack of the knitting needle and acts to lower the select jack to the initial position. See also FIG.
7B shows two groove cams 101 and 102 provided on the groove cam plate 100 in FIG. 7A arranged in two rows.

In these devices, a groove cam plate 100 that can move left and right is controlled by a solenoid in accordance with the left and right movement of the carriage, or a lever is connected to the groove cam plate 100 and the lever is brought into contact with a carriage rail. By sliding resistance with the rail, the groove cam plate 100 is moved left and right in conjunction with the left and right movement of the carriage so that the select jack lowering cams 103 and 104 are retracted.

[0004]

However, in the above-mentioned device, since the groove cam plate 100 provided with the groove cams 101 and 102 with shanks is moved to the left and right to make the select jack lowering cams 103 and 104 appear and disappear, FIG. (A)
When the two grooved cams 101 and 102 are arranged in one row as described above, it is necessary to leave an interval so that the grooved cams do not interfere with each other.
There is a problem that the groove cam plate 100 becomes long in the left-right direction because there is a fixed interval between 03 and 104. Further, as shown in FIG. 7B, the groove cams 101, 102
Although the two select jack lowering cams 103, 104 can be made closer to each other by arranging them in two rows, there is a problem that the height of the groove cam plate 100 increases and occupies a lot of space.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent the two cam surfaces that come into contact with and come down from the butt of the select jack when the carriage moves left and right. It can be switched alternately in conjunction with the left and right movement direction of the carriage,
In addition, the distance between the knitting locks of the carriage is reduced by the select jack lowering cam device in the compact flat knitting machine.

[0006]

According to the present invention, at least a pair of needle beds are arranged at the front and rear with their tips abutted, and a plurality of knitting needles are arranged side by side on the needle bed so that they can be moved forward and backward. A select jack lowering cam device of a flat knitting machine, which is provided on a carriage for reciprocating along a needle bed to operate a knitting needle, and which distributes a select jack to at least two positions to select the knitting needle. During the knitting lock of the same carriage, the cam surface that abuts the select jack butt of the knitting needle to lower the select jack to the initial position when knitting the carriage to the left, and the cam surface that abuts the select jack bat of the knitting needle when knitting to the right of the carriage Selective jack that has a cam surface that lowers the select jack to the initial position and that has a rotation fulcrum in the middle of both cam surfaces. One or the other provided on the select jack lowering cam by rotating the select jack lowering cam by forming the rotary cam supporting the rotary fulcrum of the select jack lowering cam within the thickness of the cam mounting plate of the carriage. A select jack lowering cam attaching means for allowing the cam surface of the selector jack to emerge from the cam attaching plate of the carriage, and a cam switching means for changing the rotating direction of the select jack lowering cam to switch the cam acting on the select jack. Characterize.

Further, according to the present invention, a concave portion is provided as a rotation fulcrum in the middle of both cam surfaces provided on the select jack lowering cam, and the select jack lowering cam attaching means is pivoted to the concave portion of the select jack lowering cam. The present invention is characterized in that it has a rotating shaft which is attached to and rotatably supports the select jack lowering cam.

Further, according to the present invention, the cam switching means switches the swinging arm for rotating the select jack lowering cam and the swinging direction of the swinging arm in association with the moving direction of the carriage. A sliding member is provided at a contact position with the carriage rail, and the sliding member and the carriage rail are
It is characterized by being composed of a magnetic body and a magnet, or a combination of a magnet and a magnet.

Further, according to the present invention, when there are three or more knitting locks on the same carriage, the swinging arms are provided in the cam switching means in order to interlock the select jack lowering cams provided between the knitting locks. It is characterized in that a connecting rod for connecting is provided.

Further, according to the present invention, a projecting piece is provided below the connecting rod of the cam switching means, and a stopper is provided so as to be fitted in the projecting piece so as to form a recess in the longitudinal direction of the needle bed. Characterize.

[0011]

According to the present invention, when the carriage is knitting to the left or to the right, the butt of the select jack of the knitting needle is brought into contact with the cam surface to lower the select jack to the initial position. The select jack lowering cam provided with a rotation fulcrum is rotatably supported by a rotating shaft of the select jack lowering cam mounting means which forms the rotation fulcrum provided on the select jack lowering cam within the thickness of the cam mounting plate of the carriage. Supported. Then, by changing the rotation direction of the select jack lowering cam by the cam switching means, one or the other cam surface of the select jack lowering cam pivotally supported by the select jack lowering cam mounting means is projected and retracted from the cam mounting plate of the carriage.

According to the invention, the sliding member and the carriage rail provided at the contact position of the cam switching means with the carriage rail are composed of a magnetic body and a magnet, or a combination of a magnet and a magnet. By the movement, the sliding member is moved to the rear side in the traveling direction of the carriage by the attraction force of the magnet. With this movement,
The swing arm provided in the cam switching means swings to rotate the select jack lowering cam.

According to the present invention, three carriages can be mounted on the same carriage.
When there are one or more knitting locks, the swing arms of the cam switching means provided between the knitting locks are connected by a connecting rod, and the rotation of each select jack lowering cam is interlocked.

Further, according to the invention, a projecting piece is provided below the connecting rod of the cam switching means, and the carriage is provided with a stopper for forming a recess in the longitudinal direction of the needle bed so as to be fitted to the projecting piece. , The movement of the connecting rod that moves left and right by the movement of the carriage is limited within a certain range.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical side view of a needle bed and a carriage. However, the cam and the like of the carriage are omitted for convenience of explanation. The needle bed 1 has a plurality of needle grooves 2 formed in parallel at equal intervals.
A knitting needle 4, a needle jack 6, a select jack 8 and a selector 10 are slidably fitted in the needle groove.
The bent portion of the tip of the needle jack 6 fits into the concave portion of the knitting needle 4, so that both can slide integrally. Further, a needle jack butt 12 for manipulating the needle is formed on the needle jack 6, and is urged by an elastic leg portion 14 provided on the tail side so as to project out of the needle groove.

In the select jack 8, the leg portion 16 below the forked portion provided at the tail portion is formed with three recessed portions for positioning each of an initial position, an intermediate position, and an advanced position, which will be described later. The wire 20 provided in the longitudinal direction of the needle bed can be grasped in cooperation with the upper leg portion 18 of the. A select jack bat 22 is provided on the upper surface of the select jack 8, and a bat 24 is formed at a position on the rear side of the select jack butt 22 and in contact with the leading portion 23 of the selector 10 arranged on the upper side of the select jack 8. There is.

The selector 10 is arranged on the upper side of the select jack 8 and engages with the select jack butt 22 to select the selector head 23 and the tail of the selector for moving the select jack 8 to the intermediate position or the advanced position. Armature 2 attracted by needle actuator 25
6 are formed.

Next, the carriage 30 will be described.
FIG. 2 is a schematic view of a carriage 30 having a select jack lowering cam device according to an embodiment of the present invention. FIG. 3 is FIG.
FIG. 6 is a sectional view of the select jack lowering cam device of FIG. FIG. 4 is a schematic view of the select jack lowering cam device and the carriage when FIG. 2 is viewed from the side. Three knitting locks 32 for knitting are provided in the carriage of this embodiment.
A first and a second needle selection mechanism (not shown) are provided between each knitting lock 32, and the select jack 8 is set to an initial position (hereinafter, B position) and an intermediate position (for each knitting lock 32). Hereinafter, it is possible to select three positions, that is, the H position) and the advance position (hereinafter, the A position), and knitting, tucking, and welting can be performed at the same time. Since the carriage 30 is provided with the same devices on the front needle bed 1 and the rear needle bed 1, respectively,
The following description is for the carriage 30 on the front needle bed.
Do about.

A knitting lock 32 is provided on the cam mounting plate 34 of the carriage 30, and one knitting lock 32 is constructed as follows. 36 is a raising cam,
The crests 38 are provided on both sides of the lasing cam 36 so as to be displaceable in parallel to the slopes of the respective lasing cams 36.
The stitches corresponding to the pulling down amount of the knitting needle are adjusted. Further, a guide cam 40 for guiding the needle jack butt 12,
42 are provided respectively. Below the guide cams 40, 42 between the knitting locks, a select jack lowering cam 44 that acts on the select jack butt 22 advanced when the selector 10 selects the needle and lowers the select jack 8 to the B position is selected. A jack lowering cam device 46 is provided. In this embodiment, since the carriage 30 has the three knitting locks 32, two select jack lowering cam devices 46 are provided. Carriage 30
Fixed cams (not shown) for lowering the select jack 8 are provided on the outer sides of the knitting locks at both ends. Below the raising cam 36, select jack pressers 48 that act on the select jack butt 22 selected in the A, H, and B positions and press the select jack butt 22 into the needle groove are provided switchably. ing.

The structure of the select jack lowering cam device 46 described above will now be described. Reference numeral 44 is a select jack lowering cam. Select jack lowering cam 44
Is integrally formed with a cam surface 50A that acts on the select jack butt 22 when the carriage 30 is in the leftward knitting and a cam surface 50B that acts on the select jack bat 22 when the carriage 30 is in the rightward knitting. These cam surfaces 50 are for lowering the select jack butt 22 in the H position advanced when the selector 10 selects the needle to the B position. Between each cam surface 50A, 50B,
A cutout portion is formed for securing an advancing route from the B position to the H position of the select jack butt 22 selected by the first needle selection mechanism arranged on the leading side. A concave portion 52 is formed below the middle of both cam surfaces provided on the select jack lowering cam 44, and a convex portion 54 is formed above. In order to attach the select jack lowering cam 44 to the carriage 30, an opening is formed in the cam attaching plate 34 of the carriage 30 at the attaching position of the select jack lowering cam 44, and the select jack lowering cam 44 has the select jack lowering cam attaching means 56. It is attached by. The select jack lowering cam attachment means 56 screwed onto the cam attachment plate 34 is composed of an integral block 57. A rotation shaft 58 having a semicircular cross section for rotatably supporting the select jack lowering cam 44 is formed in parallel with the connecting shaft 64 at the lower portion of the block extending into the opening formed in the cam attachment plate 34. To be done.
In addition, a support portion 60 that rotatably supports a connecting shaft 64 that connects a swing arm 62 of a cam switching means, which will be described later, is formed above the block 57. The rotating shaft 5 provided so as to be located within the thickness of the cam mounting plate 34 of the carriage 30.
8, the cam surface 50 of the select jack lowering cam 44
A concave portion 52 formed as a rotation fulcrum is pivotally mounted at an intermediate position between A and 50B, a select jack lowering cam 44 is rotatably supported, and the select jack lowering cam 44 is operated by a cam switching means described later. By rotating in one direction, one or the other cam surface 50 provided on the select jack lowering cam 44 is projected and retracted from the cam mounting plate 34 of the carriage 30 to the needle bed side. By configuring the select jack mounting means 56 as described above, the rotary shaft 58 of the select jack lowering cam mounting means 56 is arranged at a position as close to the select jack as possible, so that when the cam surface appears or disappears. The expansion of the rotation locus of the cam surface 50 in the carriage width direction can be reduced, and as a result, the knitting locks can be arranged close to each other.

The cam switching means for swinging the select jack lowering cam 44 pivotally supported by the select jack lowering cam attaching means 56 is a first swing arm 62A at the select jack lowering cam position and the carriage 30. Second swing arm 62B positioned on the side of the carriage rail, and a connecting shaft 64 connecting the first swing arm 62A and the second swing arm 62B.
The connecting shaft 64 is pivotally supported by a support portion 60 provided on the select jack lowering cam attachment means 56 and a support portion 61 provided on the cam attachment plate 34 located on the carriage side. At the lower end of the first swing arm 62A, a concave portion 66 pivotably attached to the convex portion 54 provided on the select jack lowering cam 44 is formed.

A connecting rod 68 for rotatably connecting the upper end portion of the second swing arm 62B and the second swing arm 62B of the select jack lowering cam device 46 provided between the other knitting locks is provided, and the carriage. Two select jack lowering cams 44 provided on 30 can be interlocked. A projecting piece 70 is provided so as to project downward at the center of the connecting rod 68.
The cam mounting plate 34 is provided with a stopper 72 that forms a concave portion in the longitudinal direction of the needle bed so as to be fitted in the above position so as to limit the lateral movement of the connecting rod 68 within a certain range.

A cam surface 50A for left row knitting of the select jack lowering cam 44 protruding and retracting from the cam mounting plate 34 of the carriage 30 when the traveling direction of the carriage 30 is reversed.
And a cam surface 50B for right row knitting, a sliding member 7 having a yoke 77 in which a magnet 75 is embedded is provided at a contact position of the connecting rod 68 with the carriage rail 74.
6, the carriage rail 74 is made of a magnetic material.

A proximity sensor 78 is provided so as to face the swing arm 62B, and the swing arm 62 with respect to the traveling direction of the carriage.
The rocking position of is monitored. Further, the sensor 78 can also determine in which direction the carriage 30 is moving when the power is turned off for some reason when the power is restarted. In this embodiment, the proximity sensor 78 is the swing arm 62.
Although it is provided only on one of the swinging regions, the proximity sensor 78 is provided on both swinging regions, which enables more reliable detection.

Next, the select jack lowering cam device 4 described above.
The operation of 6 will be described. 5 and 6 show the operating states of the select jack lowering cam device 46 when the carriage 30 is knitting to the left and to the right.

When the carriage 30 reverses the traveling direction and performs leftward knitting, the sliding member 76 is displaced relative to the carriage by the sliding resistance due to the magnetic force between the magnet 75 of the sliding member 76 and the carriage rail 74. , Connecting rod 68
Moves to the rear side in the traveling direction of the carriage 30. Then, the projecting piece 70 provided below the central portion of the connecting rod 68 abuts the inner surface of the stopper 72, which forms a recess provided so as to fit with the projecting piece 70, on the rear side in the carriage traveling direction, and Stop sliding.

The two swinging arms 62 rotatably connected to both ends of the connecting rod 68 are centered on the connecting shaft 64, and the second swinging arm 62B is located on the rear side in the traveling direction of the carriage 30 and also on the first side.
The swing arm 62A swings to the front side in the traveling direction of the carriage 30. In the present embodiment, the swing arm 62, the select jack lowering cam 44, and the select jack lowering cam attaching means 56 are provided as the select jack lowering cam device 46 between the formation locks, respectively. Only the select jack lowering cam 44 of FIG.

Since the lower end of the first swing arm 62A and the top of the select jack lowering cam 44 are pivotally supported by a concave portion and a convex portion so as to swing, the swing of the swing arm 62A lowers the select jack. The cam 44 rotates the select jack lowering cam 44 about a rotating shaft 58 provided on the select jack lowering cam attachment means 56, and the carriage moving direction of the two cam surfaces 50A and 50B provided on the select jack lowering cam 44. The front cam surface 50A is advanced to the needle bed side from the cam mounting plate 34 of the carriage 30. At the same time, the cam surface 50B on the rear side in the carriage traveling direction is depressed. The advanced cam surface 50A is brought into contact with the select jack butt 22 of the select jack 8 advanced when the selector 10 selects the needle, and the select jack butt 22 is lowered to the B position. When the carriage 30 is knitting to the right, the operation is the same as when the carriage 30 is knitting to the left and the description thereof is omitted.

In the above embodiment, the case of a carriage having three knitting locks has been described, but this may be a carriage having two knitting locks, in which case it is not necessary to provide a connecting rod. A sliding member may be provided on the second swing arm so that it contacts the carriage rail or the like.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be carried out within the scope of the present invention.

[0031]

According to the present invention as described above,
The select jack lowering cam, which has a cam surface that lowers the select jack of the knitting needle to the initial position when the left knitting of the carriage or the right knitting, is carried out at the rotation fulcrum provided between the two cam surfaces of the select jack lowering cam. The select jack lowering cam mounting means formed within the thickness of the mounting plate is rotatably supported by the rotating shaft. Then, the rotation direction of the select jack lowering cam pivotally supported by the select jack lowering cam mounting means is changed by the cam switching means, and one or the other cam surface provided on the select jack lowering cam is projected / retracted from the cam mounting plate of the carriage. As a result, the select jack lowering cam device can be made compact.

The sliding member of the cam switching means and the carriage rail are composed of a magnetic body and a magnet, or a combination of a magnet and a magnet. As a result, the swing arm reliably swings due to the movement of the carriage, and the cam surface provided on the select jack lowering cam can be switched in conjunction with the horizontal movement of the carriage.

Further, when three or more knitting locks are provided on the same carriage, the cam switching means is provided with a connecting rod for connecting the respective swing arms so that the select jack lowering cam provided below each knitting lock. Can be interlocked.

Further, a protrusion is provided below the connecting rod of the cam switching means, and a stopper for forming a recess in the longitudinal direction of the needle bed so as to fit with the protrusion is provided. The left and right movements of the connecting rod can be restricted within a certain range.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a needle bed and a carriage according to an embodiment of the present invention.

FIG. 2 is a schematic view of a carriage having a select jack lowering cam device according to an embodiment of the present invention.

FIG. 3 is an AA of the select jack lowering cam device of FIG.
It is sectional drawing seen in the line direction.

4 is a schematic view of a select jack lowering cam device and a carriage as viewed from the side of FIG.

FIG. 5 is a diagram showing an operating state of the select jack lowering cam device during leftward formation.

FIG. 6 is a diagram showing an operating state of the select jack lowering cam device during right-row formation.

FIG. 7 is a diagram showing a conventional select jack lowering cam device.

[Explanation of symbols]

1 ... Needle bed 2 ... Needle groove 4 ... Knitting needle 6 ... Needle jack 8 ... Select jack 10 ... Selector 12 ... Needle jack butt 22 ... Select jack bat 25. ..Needle selection actuator 30 ... Carriage 32 ... Knitting lock 34 ... Cam mounting plate 44 ... Select jack lowering cam 46 ... Select jack lowering cam device 50A, 50B ... Cam 56 .. -Select jack lowering cam attaching means 57 ... Select jack lowering cam attaching means main body block 58 ... Rotating shaft 60 ... Supporting portion 62 ... Swing arm 64 ... Connecting shaft 68 ... Connecting Rod 70 ... Projection piece 72 ... Stopper 74 ... Carriage rail 75 ... Magnet 76 ... Sliding member

Claims (5)

[Claims] 1. A pair of needle beds are arranged at least in front and rear with their tips abutted, and a plurality of knitting needles are arranged side by side on the needle bed so as to be able to move forward and backward, and reciprocate along the needle beds. A select jack lowering cam device of a flat knitting machine, which is provided on a carriage for operating a knitting needle and distributes a select jack to at least two positions to select the knitting needle, and between knitting locks of the same carriage, When the left-hand knitting of the carriage is brought into contact with the butt of the select needle of the knitting needle to lower the select jack to the initial position, and when the right-hand of the carriage is brought into contact with the butt of select needle of the knitting needle to lower the select jack to the initial position. A select jack lowering cam having a cam surface and provided with a rotation fulcrum between the two cam surfaces; A rotation shaft for supporting the rotation fulcrum of the click lowering cam formed within the thickness of the cam mounting plate of the carriage,
The select jack lowering cam attaching means for allowing one or the other cam surface provided on the select jack lowering cam to be projected and retracted from the cam attaching plate of the carriage, and the rotating direction of the select jack lowering cam. A select jack lowering cam device in a flat knitting machine, which further comprises a cam switching means for switching a cam acting on the select jack. 2. A recess is provided as a rotation fulcrum in the middle of both cam surfaces provided on the select jack lowering cam, and the select jack lowering cam attachment means is pivotally attached to the recess of the select jack lowering cam. The select jack lowering cam device in a flat knitting machine according to claim 1, further comprising a rotating shaft that rotatably supports the select jack lowering cam. 3. The cam switching means includes a swing arm for rotating the select jack lowering cam, and a carriage rail for switching the swing direction of the swing arm in conjunction with the moving direction of the carriage. Has a sliding member at the contact position of
2. The select jack lowering cam device for a flat knitting machine according to claim 1, wherein the sliding member and the carriage rail are composed of a magnetic body and a magnet, or a combination of a magnet and a magnet. 4. When there are three or more knitting locks on the same carriage, the cam switching means connects the respective rocking arms to the select jack lowering cams provided between the knitting locks so as to interlock with each other. A select jack lowering cam device in a flat knitting machine according to any one of claims 1 to 3, wherein a rod is provided. 5. A projecting piece is provided below the connecting rod of the cam switching means, and a stopper is provided to form a recess in the longitudinal direction of the needle bed so as to fit the projecting piece. A select jack lowering cam device in the flat knitting machine according to claim 4.