JPH0978415A - Stitch cam controlling apparatus of weft knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of an apparatus for controlling the position of a stitch cam. SOLUTION: A 1st lever 16 and a 2nd lever 17 are swivellably pivoted on a carriage ground plate. Rollers 20, 23 attached to the 1st lever 16 and the 2nd lever 17 are forced to approach to each other by a forcing means 24 to clamp a cam plate of a stitch cam controlling cam from both sides with the rollers 20, 23. Another roller is positioned on the 1st lever 16 at a side opposite to the roller 20, and is brought into contact with a roller-containing face 25 of a stitch cam pressing plate 9 held integrally with a stitch cam. A forcing means 26 to force the counter projection pressing plate 9 toward the roller is placed between the counter projection pressing plate 9 and the 1st lever 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stitch control device for a flat knitting machine which controls the size of a stitch to be formed by adjusting the amount of drawing of a knitting needle.

[0002]

2. Description of the Related Art In a general flat knitting machine, a stitch provided on a carriage running on a needle bed in which a large number of knitting needles are planted is brought into contact with a butt of a jack integrally connected with the knitting needles to advance and retract the knitting needles. Knitting is performed by sliding. The size of the stitch to be formed is determined by the position of the lower end of the stitch, and the position of the stitch is controlled by a stitch control device configured by using a motor whose rotation amount is variable.

The Toyama control device is, for example, Japanese Patent Publication No. 6-9461.
No. 8 publication. In Japanese Examined Patent Publication No. 6-94618, as shown in FIG.
The sliding member 54 housed in the groove 53 provided on the upper side is sandwiched, the stitches 55 and the stitch pressing plate 56 are integrally held, and the stitches are controlled to rotate about the shaft 58 of the stitch controlling motor 57. On one surface of the cam 59, a cam plate 60 whose distance from the center of the cam changes at a constant rate is projected in a spiral shape, and the cam plate 60 is paired with rollers 61, 62 from both sides thereof.
A lever 63 which is sandwiched and supported by a crest pressing plate 56 slidably fitted in the long groove 53, and a roller 62 which is swingably attached to the crest pressing plate 56.
The pair of rollers 61 and 6 are mounted on the pair of rollers 61 and 6 by a spring 64 that is hung between the lever 63 and the crest pressing plate 56.
A stitch control device that clamps the cam plate 60 by 2 is disclosed. Furthermore, in the stitch control device disclosed in Japanese Examined Patent Publication No. 6-94618, rollers 61, 6 for holding the cam plate 60 are provided.
By urging the two toward each other, the followability of the stitch 55 with respect to the rotational displacement of the stitch control cam 59 is ensured, and when the stitch 55 cannot be lowered for some reason, the stitch control cam 59 The roller 62, which is in contact with the inside of the roller from the inside, escapes against the force of the spring 64, thereby preventing an impact.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 6-9
In the device disclosed in Japanese Patent No. 4618, the degree control cam 5
The cam plate 60 of No. 9 is formed so that the distance from the center of the cam is proportional to the rotation amount of the stitch control cam and changes at a constant rate. However, with such a cam, the roller 6 passes through the shaft 58 of the stitch control cam 59 on a line parallel to the long groove 53.
If 1 is not provided, the rotation amount of the stitch control cam 59 and the stitch 55
Can not be proportional to the amount of movement. Therefore, in the device disclosed in Japanese Examined Patent Publication No. 6-94618, the shaft 58 of the stitch control cam 59 must be provided on a line passing through the roller 61 and parallel to the long groove 53, and as a result, the stitch control motor 5
The position where 7 is arranged is limited. Therefore, in the stitch control device disclosed in Japanese Patent Publication No. 6-94618, the position where the stitch control motor 58 can be arranged is limited,
By creating a large restriction on the location of other parts,
Other parts cannot be efficiently arranged, which causes the device to become large. Further, when a plurality of cam units are provided adjacent to each other on the same carriage, the stitch control motor 58 projects outward from the stitch 55, so that the interval between the cam units cannot be shortened and the carriage becomes large. There was a problem of doing.

Further, in the stitch control device disclosed in Japanese Patent Publication No. 6-94618, the pair of rollers 6 is used.
The cam plate 6 of the stitch control cam 59 sandwiched by 1, 62
0 is formed with the same thickness in the entire region. However, as the stitch control cam 59 rotates, the inclination of the cam plate 60 changes, and the contact angle between the cam plate 60 and the rollers 61, 62 changes, so that the distance between the rollers 61, 62 changes. This will be described with reference to FIG. 11. In FIG. 11, the cam plate 71 that forms a spiral and projects is formed by a pair of rollers 72, 73.
Are urged in the directions of the arrows by springs (not shown) to hold the cam plate 71. FIG. 11A
In the state shown in FIG.
There are contact points 76 and 77 between the cam plate 71 and the rollers 72 and 73 on the line connecting 75, and the distance between the rollers 72 and 73 is equal to the thickness of the cam plate 71. Next, it is assumed that the state shown in FIG. 11A is rotated to the state shown in FIG. 11B in the direction in which the distance from the center of the stitch control cam becomes smaller. As a result, the inclination of the cam plate 71 changes, and the cam plate 71 and the rollers 72, 73
The contact points 76 and 77 of the rollers deviate from the line connecting the center points 74 and 75 of the rollers, and the distance between the rollers 72 and 73 is shown in FIG. 11A.
It becomes wider than the state shown in. In the state shown in FIG. 11B, the spring for urging the rollers 72 and 73 in the arrow direction minimizes the distance between the rollers 72 and 73.
Acts as a force to return to the state of, and this force causes a load on the stitch control motor. Therefore, in order to hold the stitch control cam in the state of FIG. 11B, the force of the motor needs to be stronger than the force of the spring, and the use of a motor with a large output is required, so that the stitch control device is large. There was a problem of becoming.

According to the present invention, a cam plate protruding from one surface of the stitch control cam is held by a pair of rollers from both sides, and
In the stitch control device that controls the position of the stitch by interlocking the displacement of the roller due to the rotational displacement of the stitch control cam with the stitch pressing plate, by increasing the degree of freedom of the placement of the motor with respect to the position of the stitch, An object of the present invention is to disclose a stitch control device capable of downsizing the device by efficiently disposing other components.

Further, the biasing means provided to secure the followability of the stitch pressing plate held integrally with the stitch and the roller contacting the roller contact surface of the stitch pressing plate generates a load on the motor. It is also an object of the present invention to disclose a stitch control device for a flat knitting machine, which enables the use of a motor having a small output as a result without making it possible to downsize the device itself.

Further, the urging means for urging the pair of rollers holding the cam plates protruding in a spiral shape from both sides in the direction of approaching each other causes a load on the motor for rotationally driving the stitch control cam. It is an object of the present invention to disclose a stitch control device for a flat knitting machine that does not have any type.

[0009]

In order to solve the above problems, a stitch control device for a flat knitting machine according to the present invention has a sliding member mounted in a long groove formed in a carriage main plate of a carriage traveling on a needle bed. Holding the stitch and the stitch presser plate as a unit, the stitch control cam is made to spirally project the cam plate on its one surface, and the first lever and the second lever are pivotable with respect to the carriage base plate. By providing urging means for supporting and urging the rollers provided on the first lever and the second lever in an approaching direction, the cam plate of the stitch control cam is clamped from both sides by the rollers, and further, the first lever is provided. Another roller is provided on the lever on the side opposite to the side where the roller is provided, and the roller is brought into contact with the roller contact surface of the stitch pressing plate that is integrally held with the stitch, and the stitch pressing plate is also provided. And Laura approaching Characterized in that a biasing means for biasing between the stitch cam holding plate and the first lever. According to the present invention, the position where the stitch control motor is provided is not limited to a line drawn in parallel to the long groove through which the stitch slides through the axis of the roller contacting the stitch control cam. Since the degree of freedom of the position where the control motor is provided is increased, other parts can be efficiently arranged, and the device can be downsized.

Further, the roller contact surface of the stitch presser plate is formed in an arc shape centered on the mounting position of the biasing means on the stitch presser plate side, and the roller contact surface is formed by the rotational displacement of the stitch control cam. It is also one of the features that the biasing means for biasing the crest pressing plate and the roller toward each other when the roller abutting against is moved is held at a constant length. According to the invention, since the biasing means for biasing the stitch pressing plate and the roller in the direction of approaching each other is kept at a constant length, a small motor can be used without causing a load on the motor. Becomes Further, since the biasing force of the biasing means can be increased, the position of the stitch can be accurately controlled.

Further, the rollers of the stitch control plate are arranged so that the distance between the pair of rollers holding the cam plate is constant regardless of the change in the contact angle between the roller and the cam plate due to the rotation of the stitch control cam. A roller that comes into contact with the abutment surface is provided. A reference surface that comes into contact with a roller on a lever is used as a reference to change the thickness of the cam plate to form a stitch control cam. Rotation of the stitch control cam causes the cam plate and the roller to rotate. One of the characteristics is that the urging means for urging the roller holding the cam plate in the approaching direction is held with a constant length even when the contact angle of the cam plate changes. According to the present invention, the urging means for urging the roller holding the cam plate in the approaching direction is held for a certain length, so that a small motor can be used without generating a load on the motor. Becomes Moreover, since the biasing force of the biasing means can be increased, the position of the crest can be accurately controlled.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1A shows a main plate 2 of the carriage 1.
FIG. 1B is a view of FIG. 1A viewed from the top, and FIG. 1B is a view of FIG. 1A viewed in the direction of arrow X (only some parts are shown for clarity). 2 is a view of FIG. 1A viewed from the direction of the arrow Y, and FIGS. 3 and 4 are diagrams showing the main parts of FIG. 1. FIG. 4 is a view showing the same parts viewed from the direction of FIG. 1A. The state viewed from the direction of 1B is arranged vertically.

On the carriage 1 which slides left and right on the needle bed of the flat knitting machine, a pair of left and right stitches 3, 4 are provided with a raising cam (not shown) arranged at the center of the cam unit interposed therebetween. The stitch control devices 5 and 6 for adjusting the positions of the stitches 3 and 4 are provided symmetrically. Since the left and right stitch control devices 5 and 6 have the same mechanism, the detail of one stitch control device 6 will be described below. The carriage base plate 2 is provided with a long groove 7 for moving the crest 4 up and down obliquely, a sliding member 8 is slidably fitted in the long groove 7, and the sliding member 8 is sandwiched between the long grooves 7. The crests 4 are fixed to the sliding members 8 integrally with the crest pressing plates 9 on the upper surface. The stitch control motor 10 is attached to the upper surface of the carriage main plate 2 through a support member (not shown). Motor shaft 1 of Toyama control motor 10
1 is equipped with a stitch control cam 13 having a cam plate 12 that projects a spiral while changing the distance from the center of the cam. The stitch control motor 10 rotationally displaces a predetermined angle stitch control cam 13 in response to an electric signal generated from a control means (not shown). Further, a first lever 16 and a second lever 17 are pivotally supported in a stacked state around a shaft 15 inserted into a mount 14 attached to the carriage base plate 2. As shown in FIG. 4, the first lever 16 is formed in a substantially H shape in a top view, and as shown in FIG. 1A, the shaft 15 is inserted into the openings 18 and 19 formed in the intermediate portion of the first lever 16 so as to swing freely. Supported. The first lever 16 pivotally supports the rollers 20 and 21 on different side surfaces at both ends thereof. On the other hand, the second lever 17 is formed in a substantially I shape in a top view,
The shaft 15 is inserted through the opening 22 formed in the middle portion thereof and is pivotally supported so as to be swingable, and the roller 23 is also pivotally supported corresponding to the roller 20 of the first lever 16. The roller 20 of the first lever 16 and the roller 23 of the second lever 17 are the cam plate 1 protruding from the stitch control cam 13.
2 is sandwiched from both sides thereof, and the rollers 20, 23
At the end opposite to the side where the
By arranging the spring 24 between the levers 17, the rollers 20 and 23 are urged in the directions to approach each other.
The cam plate 12 is held between 0 and 23. On the other hand, the first lever 1
The other roller 21 of No. 6 is brought into contact with the roller contact surface 25 formed at the lower part of the stitch pressing plate 9 held integrally with the stitch 4. A spring 26 is stretched between the stitch pressing plate 9 and the first lever 16. The spring attachment point 27 on the first lever 16 is provided coaxially with the roller 21 that abuts against the roller abutment surface 25 of the stitch pressing plate 9. The spring mounting point 28 on the stitch holding plate 9 is the long groove 7
It is preferable to provide it on the center line WW. Roller 21
As shown in FIG. 3, the roller contact surface 25 of the stitch presser plate 9 that contacts the spring 2 attached to the stitch presser plate 9 is
It is formed in an arc shape with the attachment point 28 of 6 as the center.
In addition, 29 is a sensor for detecting the reference position which is the highest position of the stitch control cam 13, and 30 is a detection piece.

The cam plate 12 of the stitch control cam 13, which is rotationally displaced by the stitch control motor 10, has rollers 20 from the inside.
And an outer shell 32 with which the roller 13 abuts from the outside. In the present embodiment, the crest 4 is determined by the position of the roller 21 that contacts the roller contact surface 25 of the crest pressing plate 9.
The position of is determined. Since the position of the roller 21 is determined by the position of the roller 20 provided on the same first lever, the inner contour 31 contacting the roller 20 serves as a reference surface of the cam plate 12 that determines the position of the stitch 4. Therefore, first, the inner contour 31 serving as the reference surface of the cam plate 12 is determined so that the stitch 4 moves in proportion to the rotation amount of the stitch control cam 13, and then the inner contour 31 is used as a reference. The outer shell 32 is defined such that the distance between the bearings 20 and 23 is constant regardless of the rotational displacement of 13 (the roller 21 that abuts the roller abutting surface 25 of the stitch pressing plate 9 is provided on the second lever). If you have to determine the outer contour first, then determine the inner contour).

Next, a method of forming the cam plate 12 of the stitch control cam 13 will be described with reference to FIGS. First, as shown in FIG. 5, an arbitrary straight line AA (preferably the center line W- of the long groove 7) drawn in parallel with the long groove 7 formed in the carriage base plate 2.
W), the upper limit point B1 and the lower limit point C1 of the stitch presser plate 9 are determined. Next, the roller 21 is moved upward along the straight line A-A, and the roller 21 and the upper limit point B are moved.
The positions of the center of the roller 21 when 1 and the lower limit point C1 are in contact are defined as an upper limit center point B2 and a lower limit center point C2, respectively. When the center of the roller 21 reaches the upper limit center point B2 and the lower limit center point C2, the crest 4 is at the highest position and the lowest position, respectively.

Next, an arbitrary point D on which the rotary shaft 11 of the stitch control motor 10 is provided is determined, and the straight line A- passing through the point D is determined.
Draw a straight line EE parallel to A. Next, the upper limit center point B2
A perpendicular line F-F passing through the straight line A-A and a perpendicular line G-G passing through the lower limit center point C2 and perpendicular to the straight line A-A are drawn, and points intersecting with the straight line E-E are point H and point I, respectively. And
Next, a line J-J connecting the upper limit center point B2 and the point I and a line K-K connecting the lower limit center point C2 and the point H are drawn, and the intersection point L is defined as the first point.
The position is such that a common shaft 15 for the lever 16 and the second lever 17 is provided. Next, an arc B2-C2 passing through the points B2 and C2 centering on the point L and an arc H-I passing through the points H and I centering around the point L are created (the arc B2-C2 is where the crest 4 is the highest). This is the locus of the center of the roller 21 when moving from the position to the lowest position, and the arc H-I is the locus of the center of the roller 20). Next, with the position where the roller contact surface 25 of the stitch pressing plate 9 contacts the point B2 as the start point and the position where the roller contact surface 25 contacts the point C2 as the end point, the roller contact surface 25 is divided into seven steps along the long groove 7 at equal intervals (this embodiment). In the example, the stitch 4 can be set in 7 steps), and the roller contact surface 25 and the arc B2-C at that time are moved.
The intersections of 2 are the points B2, M1, N1, O1, P1, respectively.
Q1 and C2 (points B2 and C2 are already determined, so points M1, N1, O1, P1 and Q1 are newly determined). Points B2, M1, on this arc B2-C2
N1, O1, P1, Q1 and C2 are positions where the center of the roller 21 exists when the stitch 4 is moved from the highest position to the lowest position in seven steps. Next, on the arc H-I, centering on the point L, the points B2, M1, N1, O1, P1, Q
1, C2 symmetrical points I, Q2, P2, O2, N2, M
Take 2, H. (Because the point H and the point I have already been determined, the points M2, N2, O2, P2 and Q2 are newly determined). Points I, Q2, P2, O2 on this arc H-I
N2, M2, and H are positions where the center of the roller 20 exists when the stitch 4 is moved from the highest position to the lowest position in seven steps. Next, as shown in FIG. 6, when the stitch 4 is at the lowest position, a straight line D-H connecting the point H where the roller 20 of the first lever 16 exists and the center D of the stitch control motor 10 is stitched. It is assumed that the distance from the center of the control cam 10 to the cam is the maximum. Next, an arbitrary rotation angle of 324 degrees of the stitch control cam 13 required to move the stitch 4 from the highest position to the lowest position is determined. Next, divide the rotation angle 324 degrees by 6, and rotate the rotation angle 5 to move the crest 4 one step.
4 degrees is calculated (since the point H and the point I are moved in 7 steps, if the total rotation angle is divided into 6 equal parts, the angle necessary to move the crest by 1 step is determined). Next, a straight line D-M connecting the center point D of the rotary shaft 11 of the stitch control motor 10 and the point M2
From 2 to the angle (5
Counterclockwise direction (clockwise direction is also possible) for 54 degrees calculated by multiplying 4 degrees) by the number of steps to move 1 (the point M2 is the position where the peak is moved one step from point H) Rotate to and draw straight line DR. Next, the center of the roller 20 is point M.
The distance between the point D and the point M2 at the time of 2 is measured, and the straight line D
On R, take a point M3 whose distance from point D is equal to the distance between said point D and point M2. This point M3 is required to move the crest 4 one step from the point H where the crest is at the lowest position.
When rotating the stitch control cam 13, the roller 20
This is the position where the center of exists. Similarly, 108 degrees (54 degrees) required to move the crest 4 from the straight line D-N2 in two steps
Degree x number of steps 2) Straight line D drawn by rotating clockwise
On S, take a point N3 whose distance from point D is equal to the distance between points D and N2. Subsequently, also with respect to the points O2, P2, Q2, I, similarly, points O3, P3, Q3 are respectively drawn on the lines drawn by rotating 162 degrees, 216 degrees, 270 degrees and 324 degrees.
Take I3. And points M3, N3, O3, P3, Q3
Points H, M3, N3, O3, P3, Q obtained by adding point H to I3
A line 33, which is drawn by offsetting to the outside by a distance equal to the radius of the roller 20 with respect to the spline curve H-I3 connecting 3 and I3, becomes the inner contour 31 of the cam plate 12.

Next, the outer contour 32 of the stitch control cam 13 will be described with reference to FIGS. 7 and 8. Japanese Patent Examination 6-946
In the stitch control cam disclosed in No. 18, when the line 33 forming the inner contour 31 of the cam plate 12 is determined, the line 33 is offset by an arbitrary distance (thickness of the cam plate 12) and pulled. The line is the outer shell 31, and the cam plate 12 is formed to have the same thickness over the entire area. On the other hand, in the present invention, the cam plate 12 is arranged so that the distance between the rollers 20 and 23 is always constant even if the contact angle between the cam plate 12 and the rollers 20 and 23 is changed by the rotation of the stitch control cam 13. Form. First, as shown in FIG. 7, a point H4 where the center of the roller 23 of the second lever 17 exists when the roller 20 exists at the point H is arbitrarily determined. In this way, by determining the position of the roller 23 of the second lever 17 that serves as a reference with respect to the roller 20 of the first lever 16, the point L serving as the common axis of the first lever 16 and the second lever 17 and the roller 20 are determined. The positional relationship between the center H of the first lever 16 and the roller 23 of the second lever 17 is determined, and the positional relationship between the center H of the roller 23 and the point H4 where the center of the roller 23 exists is determined. The roller 20 and the roller 23 are coaxially supported by the first lever 16 and the second lever 16.
Since it is provided on the lever 17, the roller 20 and the roller 23 move on a concentric circle centered on the point L. In the present invention, even if the stitch control cam 13 rotates, the rollers 20, 23
The interval between the first lever 1 is always constant, that is, the three points L, H, and H4 are kept in the reference positional relationship.
The cam plate 12 is formed so that the 6 and the second lever 17 swing. Therefore, first, as shown in FIG.
The center of 0 is the point H, M2, N2, O2, P2, Q2, I2
Points H4 and M where the center of the roller 23 when moving to
4, N4, O4, P4, Q4, I4 are calculated. (Point L,
Since the points H and H4 maintain a constant positional relationship, a straight line L-H connecting the points L and H and a straight line H- connecting the points H and H4
The positions of M4, N4, O4, P4, Q4, and I4 can be obtained by measuring the angle at which H4 intersects and the distance from point H to point H4). A line D-T drawn by rotating 54 degrees necessary for moving the crest 4 one step from the line D-M4 connecting the points M4
On a point M5 (not shown) the distance from point D is equal to the distance between point D and point M4. This point M5 is a position where the center of the roller 23 exists when the stitch control cam 13 required to move the stitch 4 by one step from the point H5 where the stitch 4 is at the highest position is rotated by 54 degrees. . Similarly, straight line D-N
The distance from point D on the straight line DU (not shown) drawn by rotating clockwise from 108 to 108 degrees (54 degrees x number of steps 2) necessary to move the crest 4 in two steps. Takes a point N5 equal to the distance between points D and N4. Similarly, point O
For 4, P4, Q4, I4, 162 degrees, 216 degrees,
On the line drawn by rotating 270 degrees and 324 degrees, O5, P
Take 5, Q5 and I5. Points M5 and N obtained by this
5, O5, P5, Q5, I5 at point H5 (point H5 is point H4
(The same point as above) H5, M5, N5, O5, P5
A line 34 obtained by offsetting the spline curve H5-I5 connecting Q5 and I5 by an interval equal to the radius of the roller 23 and drawing the contour 34 of the stitch control cam 13.

As described above, according to the present invention, points at which the distance between the rollers 20 and 23 is equal are obtained for each point according to the number of steps of moving the stitch 4 (7 steps in the above embodiment). The points are complemented by spline curves. Therefore, strictly speaking, the roller 2
Rollers 20, 0, 23 only when they are on each point
It is conceivable that the intervals between 23 become equal, and the intervals change slightly in other parts. However,
Actually, the position of the stitch is adjusted in 90 steps or more. Therefore, if the 7 steps are changed to 90 steps, for example, the change in the gap between the rollers can be reduced to a level that does not pose a problem.

Next, the operation of the stitch control device will be described with reference to FIG. FIG. 9A shows a state where the crest is at the highest position, and FIG. 9B shows a state where the crest is at the lowest position. If the carriage 1 is run in the direction of arrow Z in FIG. 1 and the next course is knitted, the stitch 4 of the stitch control device 6 on the trailing side in the traveling direction of the carriage 1 is knitted. Used for. At the time when the formation of the previous course is completed, the stitch 4 is raised to the highest position as shown in FIG. 9A. When the carriage 1 is reversed, an electric signal emitted from a control device (not shown) moves the stitch 3 of the stitch control device 5 used for the formation of the previous course to the highest position, and the rest state is set. The stitch control cam 13 of the stitch control device 6 is rotationally displaced to lower the stitch to a position corresponding to the size of the stitch forming the stitch 4. Now, assuming that the stitch 4 is moved to the lowest position shown in FIG. 9B, the stitch control cam 1 is moved from the state shown in FIG. 9A.
By rotating 3 in the counterclockwise direction by 324 degrees, the crest 4 is moved to the lowest position. When the stitch control cam 13 is rotationally displaced, the second lever 17 is swung clockwise around the shaft 15 via the roller 23 that is in contact with the outer shell 32 of the stitch control cam 13. As a result, the first lever 16 with which the roller 20 is in contact with the inner contour 31 of the stitch control cam 13 is also swung clockwise around the shaft 15. The spring pressing plate 9 is in contact with the roller 21 of the first lever 16 at the roller contact surface 25 by the spring 26.
Is lowered along the long groove 7 according to the swing of the first lever 16, and the carriage travels and knitting is performed with the stitch 4 which is held integrally with the stitch pressing plate 9 being lowered to the lowest position. Be seen. Even if it is difficult to lower the needle for some reason during knitting, it is possible to prevent the impact from being exerted by the crest 4 escaping upward against the spring 24 or the spring 26, whichever has the smaller tension. .

The first lever 16 and the second lever 17 are swung about the shaft 15 due to the rotational displacement of the stitch control cam 13, and at this time, the roller 2 that contacts the cam plate 12 is rotated.
The contact angle between 0, 23 and the cam plate 12 changes depending on the rotation of the stitch control cam 13, but in the present invention, the rollers 20, 2
Since the cam plate 12 is formed by changing the thickness so that the distance between the three is always constant, the stitch control cam 13
Even when the roller is rotationally displaced, the distance between the rollers 20 and 23 is always displaced while being constant. Therefore, the spring 24 hung between the first lever 16 and the second lever 17 is held in a constant length without expanding and contracting.
The spring 24 laid between the lever 16 and the second lever 17 does not cause a load on the stitch control motor 10 for rotating the stitch control cam 13. In addition, the roller 21
Moves along the arc B2-C2 on the roller contact surface 21 as the first lever 16 is swung. The roller contact surface 21 has a mounting position 28 of the spring 26 on the stitch pressing plate 9. Since it moves on the roller contact surface 25 that is formed in an arcuate shape around the center, the spring 26 is always held in a state of maintaining a constant length. Therefore, the spring 26 does not cause a load on the stitch control motor 10 for rotating the stitch control cam 13.

Next, when the carriage is reversed to perform the knitting of the next course, the stitch 3 of the stitch control device 5 located on the trailing side in the traveling direction of the carriage 1 is used for knitting.
The stitch 4 of the stitch control device 6 located on the leading side is moved to the highest position. Therefore, from the state shown in FIG. 9B, the stitch control cam 13 is rotated in the clockwise direction by 324 degrees, and the sensor 29 detects the detection piece 30 so that the control unit raises the stitch 4 to the maximum raised position. Judgment is made, and the rotation of the stitch control motor 10 is stopped. At this time, the stitch control cam 13 is rotated in the clockwise direction, so that the first lever 16 with which the roller 20 is in contact with the inner contour 31 of the cam plate 12 of the stitch control cam 13 is rotated about the shaft 15. It is oscillated in a clockwise direction, whereby the mountain pressing plate 9 in contact with the roller 21 at the roller contact surface 25 is pushed up in the long groove 7 to the highest position.

As described above, in the stitch control device of the present invention, the levers 16 and 17 swinging around the shaft 15 provided on the carriage base plate 2 and the roller 2 provided on the lever.
By interlocking the rotational displacement of the stitch control cam 13 with the stitches through 0 and 23, the degree of freedom of the position where the stitch control motor 10 is arranged can be increased. Further, in the present invention, since the roller 21 is provided on the first lever 16, the roller 21 moves along the arc B2-C2, and along the long groove like the roller 61 of Japanese Patent Publication No. 6-94618. Does not move. Therefore, when the stitch control cam 59 disclosed in Japanese Patent Publication No. 6-94618 in which the distance from the center of the cam is changed at a constant rate is used as a substitute for the stitch control cam 13 of this embodiment, the cam is used. Although the amount of rotation of the crest and the amount of movement of the crest are not proportional, in the present invention, when the crest 4 is moved from the highest position to the lowest position at equal intervals, the roller contact surface 2 is moved.
Roller 2 corresponding to the position where 5 exists
Since the position 1 is obtained and the stitch control cam 13 is formed based on the position 1, the vertical movement amount of the stitch can be proportional to the rotation angle of the stitch control cam 13.

Since the rotational displacement of the stitch control cam 13 is transmitted to the stitch pressing plate 9 via the first lever 16, the followability between the stitch pressing plate 9 and the roller 21 is ensured. Although it is necessary to provide the spring 26, even if the spring 26 is added to the configuration, no load is generated on the stitch control motor 10, and it is not necessary to change to a motor having a large output.

Further, since the springs 24 and 26 do not generate a load on the stitch control motor 10,
A spring 24 for urging the roller 20 of the first lever 16 and the roller 23 of the second lever 17 toward each other,
And the roller 21 on the roller contact surface 25 of the stitch pressing plate 9.
It is possible to use a spring having a strong urging force for each of the springs 26 that presses, thereby making it possible to reliably follow the movement of the stitch control cam 13 and accurately control the stitch. .

Furthermore, since neither of the springs 24 and 26 causes a load on the stitch control motor 10,
The stitch control motor 10 may be dedicated to the rotation of the stitch control cam 13, and a mechanism for holding the position of the stitch 4 may be separately provided. In this way, the stitch control motor 10 needs to have an output that can rotate the stitch control cam 13 in a no-load state, or have a holding force for holding the position of the stitch 4. Since there is no such difference, the stitch control motor 10 can be downsized.

Further, in the present invention, as shown in FIG. 4, by increasing the distance 35 between the roller 20 of the first lever 16 and the roller 21 provided on the opposite side surface, as shown in FIG. The stitch control motor 10 can be provided at a position apart from the carriage base plate 2. By adjusting the gap 35 in this way, the gap 36 between the carriage base plate 2 and the stitch control motor 10 can be adjusted, and the position where the stitch control motor 10 is provided can be freely set. Further, in the above-described embodiment, the first lever 16
Although the second lever 17 and the second lever 17 are coaxially supported, it is also possible to respectively support different shafts.

[0027]

As described above, in the stitch control device for a flat knitting machine according to the present invention, the position where the shaft of the stitch control motor is provided passes through the shaft of the roller contacting the stitch control cam, and the stitch slides. It is not limited to the line drawn parallel to the moving long groove, and the degree of freedom of the position where the stitch control motor is installed is increased, so that other parts can be efficiently arranged and the device can be downsized. .

Further, since the roller contact surface of the stitch presser plate is formed in an arc shape centering on the spring mounting portion of the stitch presser plate, the spring always has a constant length regardless of the swing of the lever. The spring does not load the stitch control motor. Even if the spring is strengthened, no load is applied to the stitch control motor. Therefore, a spring with strong urging force is used to accurately control the stitch by making the stitch presser plate follow the displacement of the roller. It is possible.

Further, since the cam plate of the stitch control cam is formed by changing the thickness of the cam plate of the stitch control cam so that the interval between the rollers sandwiching the cam plate of the stitch control cam is always constant, the cam plate is formed. The spring that urges the sandwiching rollers toward each other keeps a constant length, and does not cause a load on the motor that drives the cam. Therefore, a motor having a small output can be used, and the stitch control device can be downsized. Further, even if the spring force is increased, no load is generated on the motor. Therefore, a spring having a strong biasing force can be used, and the stitch can be reliably followed by the rotation of the stitch control cam, and the stitch can be accurately controlled.

[Brief description of drawings]

FIG. 1A is a view of a bottom plate of a carriage as viewed from below, and FIG. 1B is a view of the same as viewed from a direction of an arrow X in FIG. 1A.

FIG. 2 is a diagram viewed from a direction of an arrow Y in FIG. 1A.

FIG. 3 is a diagram showing components constituting a stitch control device.

4A and 4B are a view of components constituting the stitch control device viewed from the direction of FIG. 1A and a view viewed from the direction of FIG. 1B.

FIG. 5 is a diagram showing a method of determining an inner contour of a cam plate.

FIG. 6 is a diagram showing a method of determining an inner contour of a cam plate.

FIG. 7 is a diagram showing a method of determining an outer contour of a cam plate.

FIG. 8 is a diagram showing a method for determining an outer contour of a cam plate.

FIG. 9A is a diagram showing a maximum raised position of a stitch, and FIG. 9B is a diagram showing a maximum lowered position.

FIG. 10 is a diagram showing a conventional stitch control device.

FIG. 11 is a diagram schematically showing a conventional stitch control device.

[Explanation of symbols]

 1 Carriage 2 Carriage Main plate 3 degree crest 4 degree crest 5 degree crest control device 6 degree crest control device 10 degree crest control motor 12 cam plate 13 degree crest control cam 16 first lever 17 second lever 20 roller 21 roller 23 roller 24 spring 26 Spring 31 Inner Shell 32 Outer Shell

Claims (3)

[Claims] A sliding member (8) mounted in a long groove (7) formed in a main plate (2) of a carriage traveling on a needle bed in a stitch control device for controlling the amount of drawing of a knitting needle in a flat knitting machine. The stitch control cam (13) is spirally projected on one surface of the stitch control cam (13) to hold the stitch (4) and the stitch presser plate (9) together. ) To the first lever (16) and the second lever (1
7) pivotally supports the first lever (1)
6) and rollers (20, 20 provided on the second lever (17)
By providing an urging means (24) for urging the step (23) in the approaching direction, the cam plate (12) of the stitch control cam (13) is clamped from both sides by the rollers (20, 23), and the first
Another roller (21) is provided on the side of the lever (16) opposite to the side where the roller (20) is provided, and the roller (21) is held integrally with the thread (4). The biasing means (26) for abutting against the roller contact surface (25) of the plate (9) and biasing the stitch pressing plate (9) and the roller (21) approach each other. 9) and the first lever (16), the stitch control device for a flat knitting machine. 2. A roller contact surface (2) of the stitch pressing plate (9).
5) is formed in an arc shape around the attachment position (28) of the biasing means (26) on the stitch pressing plate (9) side, and the roller contact surface is formed by the rotational displacement of the stitch control cam (13). (2
When the roller (21) abutting on (5) moves, the urging means (26) for urging the crest pressing plate (9) and the roller (21) toward each other is held at a constant length. The stitch control device for a flat knitting machine according to claim 1, wherein 3. A pair of rollers (20) for holding the cam plate (12) regardless of a change in contact angle between the rollers (20, 23) and the cam plate (12) due to rotation of the stitch control cam (13). ，
Rollers (2) contacting the roller contact surface (25) of the stitch pressing plate (9) so that the distance between them is constant.
With reference to a reference surface (31) with which the roller (20) on the lever (16) provided with (1) is in contact, the thickness of the cam plate (12) is changed to form the stitch control cam (13). Even if the contact angle between the cam plate (12) and the rollers (20, 23) changes due to the rotation of the mountain control cam (13), the cam plate (12)
3. The urging means (24) for urging the rollers (20, 23) for holding the roller in a direction of approaching the roller (20, 23) is held at a constant length, according to claim 1 or claim 2. Flat mountain knitting machine control device.