JP5286249B2 - Deshan cam device - Google Patents

Description

  The present invention relates to a mountain cam device that is mounted on a carriage of a flat knitting machine and acts on a bat of a knitting needle arranged side by side on a needle bed to draw a knitting needle into the needle bed to form a stitch.

  2. Description of the Related Art Conventionally, a cam system including a mountain cam has been formed on a carriage of a flat knitting machine so that a lowering cam surface is formed to draw a knitting needle into a needle bed from a state in which a hook at the tip has advanced into the tooth opening. It is installed. If the degree cam is slid and moved in the direction of the inclination to draw the knitting needle on the lower cam surface, the stitch value indicating the size of the stitch can be adjusted by changing the pull-in amount of the knitting needle (for example, Patent Document 1). When the stitch value is large, the amount of knitting yarn drawn increases and the stitch becomes rough. When the stitch value is small, the amount of drawing of the knitting yarn is reduced and the stitch becomes fine.

  FIG. 7A shows a degree cam that is described with reference numeral 4 in FIG. 1 of the degree control device disclosed in Patent Document 1, with the reference numeral changed to 1. When the carriage (not shown) travels along the surface of the needle bed 2 in the left-right direction in the drawing, the degree cam 1 is moved from the tip 3 of the needle bed 2 to the tip side of the knitting needle 4. The lower cam surface 1a acts on the bat 4b of the knitting needle 4 so that the hook 4a of the knives 4 moves backward. The knitting needle 4 is drawn into the needle bed 2 and accommodated in a needle groove not shown. The lowering cam surface 1a is shifted to the determining portion 1b each time the amount of the knitting needle 4 is retracted and is finished. The degree determining unit 1b is called a fumi. Further, the knitting needle 4 is schematically shown. In particular, the hook 4a is not actually viewed from the surface side of the needle bed 2, but only the portion of the hook 4a is rotated 90 degrees. Further, the knitting needle 4 is a latch needle, and is provided with a latch 4c for opening and closing the hook 4a.

  A state is assumed in which the formed stitch is held in the hook 4a and the latch 4c is closed. When the hook 4a is advanced to the tooth opening 3, the stitch in the hook 4a stays near the tip of the needle bed 2, so that the stitch moves relative to the needle stem side 4d by opening the latch 4c. The knitting yarn 5 is supplied from the tooth opening 3 to the hook 4 a of the knitting needle 4 that has advanced into the tooth opening 3. When the knitting needle 4 is pulled to the needle bed 2 side by the degree cam 1, the stitch that has been moved to the needle stem 4d side moves relatively to the hook 4a side, and the latch 4c is closed in the middle of the stitch 4 in the hook 4a. Without hooking, the hook 4a is knocked over and disengaged toward the tooth opening 3 side. The old loop formed in this way is not shown, and only the new loop formed by the hook 4a is shown as the stitch 6.

FIG. 7B shows a configuration in the vicinity of the degree determining portion 1 b of the degree mountain cam 1. The lowering cam surface 1a is inclined by the lowering angle θ with respect to the direction 2a in which the needle bed 2 side moves relative to the carriage. The lowering angle θ is maintained at about 50 degrees. If the width of the degree determining portion 1b is large, the knitting yarn 5 may be broken. If the width of the degree determining portion 1b is small, even if the stitch 6 is formed by retracting the knitting needle 4, the stitch 6 may be reduced by retracting the next knitting needle 4.
On the lower side of the degree cam 1, there is a case where a relief 1 c is formed as a stabilizing cam surface for stabilizing the formed stitch following the degree determining portion 1 b. Even if the relief 1c is formed, the bat 4b of the knitting needle 4 is coasting and moves in the direction of the extension line 1d of the degree determining portion 1b. However, when a knot or the like arrives at the portion 1c, the knitting yarn 5 is slackened to prevent yarn breakage. Further, irregularities called leveling 1e may be provided to make the drawn yarn length uniform. Further, the degree determining portion 1b at the position of transition from the lowered cam surface 1a to the stabilizing cam surface may be rounded. The degree determining portion 1b and the stabilizing cam surface are necessary to form a knitted fabric having the same size of the stitches 6, and particularly to stabilize the adjustment result when the stitch adjustment is performed.

  In the mountain cam 1, the position of the lowering cam surface 1a protruding toward the needle bed 2 is shifted, and the bat 4b protruding from the needle bed 2 toward the carriage has two different scale values depending on the height of the bat 4b. In some cases, the stitch 6 can be formed. Furthermore, a variable degree difference mechanism that enables two kinds of scale values to be adjusted to some extent independently is disclosed (for example, see Patent Document 2). In Patent Document 2, the cams corresponding to the two angle cams are slid and moved at the same lower angle to adjust the pull-in amount. The cam surface on the lower side of each cam has the same shape at least corresponding to the fumigation 1b.

  In addition, it is known that the lowering angle θ of the degree cam 1 is determined to be an optimum value based on the relationship between the drawing amount of the knitting yarn 5 and the gauge corresponding to the interval at which the knitting needles 4 are arranged in parallel. Therefore, when changing the pull-in amount of the knitting yarn 5 by adjusting the stitches, it is ideal to change the lowering angle θ. As for the circular knitting machine, a technique is disclosed in which the angle corresponding to the lowering angle θ is changed by rotating around a shaft provided on the sealing cam corresponding to the degree cam (see, for example, Patent Document 3).

Japanese Patent No. 3899315 Japanese Patent No. 4016031 JP 2001-159055 A

  The preferred shape of the flat cam 1 of the flat knitting machine is determined by the design including the degree determining portion 1b and the stabilizing cam surface. During the second adjustment, it is considered to be ideal to change the lowering angle θ together with the drawing amount of the knitting yarn 5, for example, to change the lowering angle θ according to the magnitude of the drawing amount. However, simply applying the idea of Patent Document 3 to rotate the angle cam 1 to change the lowering angle θ changes the angle of the degree determining portion 1b and the stabilizing cam surface at the same time.

  If the degree determining portion 1b is formed in an arc shape and the center of the circular arc coincides with the rotation center of the degree cam 1, the influence of the change in the lowering angle θ can be avoided in determining the pull-in amount by the degree determining portion 1b. Although there is a possibility, it deviates from a suitable shape. However, as in Patent Document 3, in order to provide a shaft for rotation inside a portion corresponding to the degree determining portion 1b, the arc of the degree determining portion 1b is set to a large radius obtained by adding a surplus to the shaft diameter. There must be. Further, in the case where the relief 1c or the leveling 1e is provided as the stabilizing cam surface, the rotation greatly affects these functions.

  An object of the present invention is to provide a degree cam device that hardly affects the action of the degree determining portion and the stabilizing cam surface even if the magnitude of the lowering angle θ is changed.

The present invention is mounted on a carriage of a flat knitting machine and tilts so as to retract the knitting needle in the direction of retreating from the mouth, and a determination unit that determines the amount of knitting needle retracted after the inclination of the lowering cam surface is finished And a stabilizing cam surface that stabilizes the stitch in a state in which the knitting needle is retracted, and in the degree cam device that can adjust the stitch value corresponding to the pulling amount of the knitting needle,
The lower cam surface as a part of the outer shape, and on the inner side, an inner arc surface corresponding to at least a part of arcs of different diameters with a common center of rotation provided inside the determination portion A rotating cam that has a void that includes an outer arc surface in its outline, and is rotatable so that a lowering angle at which the lowering cam surface is inclined with respect to the traveling direction of the carriage can be changed;
A sliding cam having a supporting surface for supporting the rotating cam and capable of sliding along a predetermined reference angle of the downward angle corresponding to the degree value;
The rotating cam supported by the supporting surface of the sliding cam is accommodated in a space of the rotating cam, and has arc surfaces corresponding to an inner arc surface and an outer arc surface of the contour of the cavity, respectively, A guide member that guides the rotation of the rotating cam while in contact;
A rotating mechanism that rotates the rotating cam supported by the supporting surface of the sliding cam and guided by the guide member;
It is a degree mountain cam apparatus characterized by including.

In the present invention, the degree determining portion and the stabilizing cam surface are provided in the sliding cam.
It is characterized by that.

Further, in the present invention, the degree determining unit has an arc part centered on the rotation center, and the degree is determined at the arc part.
It is characterized by that.

In the present invention, the carriage is formed with a linear sliding guide groove for guiding the sliding cam so as to slide and move along the reference lowering angle.
The rotation mechanism is
The carriage has a rotation guide groove that is formed so as to be substantially parallel to the sliding guide groove and includes a portion in which the distance from the guide groove changes.
The rotation cam is interlocked with the sliding cam by guiding a part of the rotation cam with the rotation guide groove.
It is characterized by that.

  According to the present invention, the rotating cam can be rotated so that the lowering angle at which the lowering cam surface as a part of the outer shape is inclined with respect to the traveling direction of the carriage can be changed. It is supported by a support surface of a sliding cam that is slidable along the inclination. If the sliding cam is slid in accordance with the stitch value, the drawing amount of the knitting yarn can be changed. If the rotating cam is rotated with respect to the sliding cam by the rotating mechanism, the lowering cam surface is lowered. The angle can also be changed. An inner side of the rotary cam includes an inner arc surface and an outer arc surface corresponding to at least a part of arcs of different diameters having a common center of rotation provided inside the determining portion. Have a place. A guide member for guiding the rotation of the rotating cam while the corresponding arc surfaces are in contact with each other in the empty space of the rotating cam has arc surfaces corresponding to the inner arc surface and the outer arc surface of the outer shape of the empty space. Is housed. Since there is no need to provide an axis at the center of rotation, the diameter of the degree determining part can be reduced, and even if the size of the lowering angle θ is changed, the effect of the degree determining part and the stabilizing cam surface is hardly affected. It becomes possible to do.

  In addition, according to the present invention, since the sliding cam is provided with the determining portion that determines the amount of knitting needle retraction and the stabilizing cam surface that stabilizes the stitch while the knitting needle is retracted, the lowering angle θ is increased. Even if the height is changed, it is possible to obtain a mountain cam device that does not affect the operation of the degree determining portion and the stabilizing cam surface.

  Further, according to the present invention, the degree determining unit determines the degree at the arc portion centering on the rotation center when the rotating cam is rotated, so that the lowering angle of the lowering cam surface is changed by the rotation of the rotating cam. However, it is possible to prevent the determination conditions from changing.

  According to the present invention, the sliding cam and the rotating cam can be interlocked with a simple mechanism in which the carriage is provided with a rotating guide groove for guiding the rotating cam together with a sliding guide groove for guiding the sliding cam. .

FIG. 1 is a plan view and a side view showing a configuration of a degree cam apparatus 10 as an embodiment of the present invention, including other parts of a cam system mounted on a knitting needle 4 and a carriage 20. FIG. 2 is a partial plan view and a side sectional view showing a state in which the change in the pull-in amount and the change in the lowering angle are linked in the degree cam apparatus 10 of FIG. FIG. 3 is a plan view showing the rotary cam 11 and the combination of the sliding cam 12 and the guide member 13 used in the mountain cam apparatus 10 of FIG. 4 is a left side view, a plan view, and a front view of the sliding cam 12 used in the mountain cam apparatus 10 of FIG. FIG. 5 is a plan view and a front view showing the rotating cam 11 and the guide member 13 used in the mountain cam apparatus 10 of FIG. FIG. 6 is a plan view showing a part of a mechanism for driving the mountain cam apparatus 10 of FIG. FIG. 7 is a simplified plan view showing a conventional shape of the mountain cam 1 and its operation.

  1 to 6 show the configuration of the degree cam apparatus 10 as an embodiment of the present invention. Portions corresponding to those described in FIG. 7 are denoted by the same reference numerals. Although the knitting needle 4 shows a latch needle that opens and closes the hook 4a with a latch 4c, the present invention can be similarly applied to a compound needle that opens and closes a hook with a slider.

  FIG. 1 shows the configuration of a degree cam apparatus 10 according to an embodiment of the present invention, including the other parts of the cam system mounted on the knitting needle 4 and the carriage 20. The knitting needle 4 accommodated in the needle groove of the needle bed (not shown) is provided with a hook 4a at the tip of the needle body 4e, and the bat 4b that receives the action of the degree cam apparatus 10 is separate from the needle body 4e. Provided on the needle jack 4f. The knitting needle 4 also has a transfer function for moving the stitch between the needle beds facing each other with the tooth opening 3 interposed therebetween, and a bat used for the transfer operation is near the portion where the needle jack 4f is connected to the needle body 4e. 4g is provided. The needle body 4e is also provided with blades 4h that lock the stitches when transferring. A select jack 7 is disposed behind the needle jack 4f. A bat 7a protrudes from the select jack 7 toward the carriage side. Behind the select jack 7 is a selector 8 for selecting a needle for selecting the knitting needle 4. In the select jack 7, the bat 7 a takes one of the three positions B, H, and A according to the result of the needle selection by the selector 8.

  The mountain cam apparatus 10 includes a rotating cam 11, a sliding cam 12, and a guide member 13, and is attached to the surface side where the carriage 20 faces the needle bed. The carriage 20 reciprocates along the arrangement direction of the knitting needles 4 and has a cam system that is symmetrical with respect to the center line 20a in order to perform the same action in any of the reciprocating directions. The mountain cam device 10 is also arranged on the left and right along the angle of the mountain so as to be symmetrical with respect to the center line 20a. Such a symmetric cam system with respect to the center line 20a includes a fixed needle raising cam 21, a movable needle raising cam 22, a transfer receiving cam 23, a transfer receiving and receiving cam 24, and a guide cam 25. Further, a fixed presser 26 is arranged at a position that the butt 7a of the select jack 7 takes in the B position. A movable half presser 27a and a tack presser 27b are disposed at a position that the bat 7a takes in the H position.

  The cam system as described above is mounted on the main plate 30 of the carriage 20. The movable needle raising cam 22 protrudes from the surface of the base plate 30 at the time of stitch formation, and is switched so as to be immersed in the base plate 30 at the time of transfer. The base plate 30 is provided with a guide groove 31 for guiding the sliding cam 12 of the mountain cam apparatus 10 in the same manner as in Patent Document 1. A cam plate 33 having a rotation guide groove 32 for guiding the rotation of the rotary cam 11 is also attached to the base plate 30. The rotation guide groove 32 can also be formed directly on the main plate 30. The rotating cam 11 is rotatably supported by a guide member 13 attached to the sliding cam 12 and can change the lowering angles θ1 and θ2 as the inclination angles of the lowering cam surface 11a. At the lower part of the sliding cam 12, a degree determining part 12e similar to the degree determining part 1b of FIG. 7B and a stabilizing cam surface 12a including a dent 1c, a leveling 1e and the like are provided. The guide member 13 guides the rotating cam 11 to rotate about a rotation center 11b provided inside the degree determining portion 12e.

  In FIG. 1, the lower angle θ1 of the right angle cam device 10 where the sliding cam 12 is lowered is larger than the lower angle θ2 of the left angle cam device 10 where the sliding cam 12 is lowered. ing. However, even if the lowering angles θ1 and θ2 change, the angle determining portion 12e and the stabilizing cam surface 12a provided on the sliding cam 12 do not change the angle, so that the influence of the changes in the lowering angles θ1 and θ2 should be avoided. Can do. The sliding cam 12 is also provided with a receiving cam 12b that restricts the bat 4b of the knitting needle 4 that is pulled in along the lowered cam surface 11a so as not to be pulled too far due to inertia.

  FIG. 2 shows a state in which the change in the pull-in amount and the change in the lowering angle are linked with each other in the degree cam device 10 of FIG. (A) shows a state in which the pull-in amount is small. (B) shows a state in which the pull-in amount is large. (C) shows the structure of the cross section seen from the cut surface line CC of (b). The rotary cam 11 has a substantially parallelogram-shaped outer shape, and has a void in the outline formed by the arc surfaces 11c and 11d on the inner side. From the upper part and the lower part of the side of the rotating cam 11 that faces the lowering cam surface 11a, substantially cylindrical projections 11e and 11f project to the back side. A guide member 13 is accommodated in the empty space of the rotating cam 11 and is attached to the support surface 12c of the sliding cam 12 with a mounting bolt 13a. The guide member 13 is provided with a pressing portion 13b and arcuate surfaces 13c and 13d that are fitted to the arcuate surfaces 11c and 11d of the rotating cam 11 to guide the rotation of the rotating cam 11. Each circular arc surface 11c, 11d; 13c, 13d has the rotation center 11b as a common center.

  Parts similar to the degree determining portion 12e and the stabilizing cam surface 12a of the sliding cam 12 are also formed in the lower portion of the rotating cam 11 as the degree determining portion 11h and the stabilizing cam surface 11i. The degree determining portions 11h and 12e include arc portions having the same radius around the rotation center 11b. In (a), the degree determining portion 12e and the stabilizing cam surface 12a of the sliding cam 12 that does not rotate are located below the degree determining portion 11h and the stabilizing cam surface 11i of the rotating cam 11, and the knitting needle 4 is moved to the butt 4b. Perform the action. In (b), the degree-determining portions 11h and 12e of the rotating cam 11 and the sliding cam 12 and the stabilizing cam surfaces 11i and 12a coincide with each other and act equally on the bat 4b of the knitting needle 4.

  The inclination of the lowering cam surface 11 a of the rotating cam 11 changes as the protrusion 11 e is guided by the rotation guide groove 32. The rotation guide groove 32 is formed so as to be substantially parallel to the guide groove 31. However, on the side of the rotation guide groove 32 where the mesh value is small, an approach portion 32a having a small interval with the guide groove 31 is formed, and on the side where the mesh value is large, a separation portion 32b having a large interval is formed. The rotation guide groove 32 having the approach portion 32a and the separation portion 32b guides the protrusion 11e along the guide line 32c. The rotating cam 11 provided with the protrusion 11e is rotatably attached to the support surface 12c of the sliding cam 12. When the sliding cam 12 slides along the guide straight line 31a of the guide groove 31, the rotating cam 11 slides with a rotation that changes the inclination of the lowering cam surface 11a. In addition, if the protrusion 11f is provided also under the protrusion 11e and it guides with the guide groove 12d of the sliding cam 12, rotation can be performed still more stably.

  As shown in a sectional configuration in FIG. 2C, the rotary cam 11, the sliding cam 12, and the guide member 13 are provided on the surface side where the base plate 30 of the carriage faces the needle bed. A driving member 40 for driving the sliding cam 12 is provided on the back side of the base plate 30 for adjusting the intervals. Between the drive member 40 and the sliding cam 12, a guide member 41 that fits into the guide groove 31 is provided.

  FIG. 3 shows the rotary cam 11 and the combination of the sliding cam 12 and the guide member 13 used in the mountain cam apparatus 10 of FIG. The rotating cam 11 shown in (a) has a through hole 11g having arcuate surfaces 11c, 11d having radii Rc, Rd from the rotation center 11b in the upper and lower contours, a recess 11j on the lowering cam surface 11a side, and a protrusion 11e side. And a cavity including a recess 11k.

Although (b) shows the sliding cam 12 and the guide member 13 in combination, when the rotating cam 11 is attached to the support surface 12c of the sliding cam 12 as shown in FIGS. 2 (a) and 2 (b), The guide member 13 is removed from the sliding cam 12. If the rotating cam 11 is placed on the support surface 12c of the sliding cam 12 and the guide member 13 is inserted into the through hole 11g, the rotating cam 11 is supported by the supporting surface 12c of the sliding cam 12 in a rotatable state. The When the guide member 13 is inserted, the recesses 11j and 11k shown in FIG. 3A are pressed by the left and right pressing portions 13b shown in FIG.
The portion of the rotating cam 11 where the rotation center 11 b is provided covers the surface of the portion where the stabilizing cam surface 12 a is formed on the lower side of the sliding cam 12. The stabilizing cam surface 12a, which is the back side of this portion, coincides with the stabilizing cam surface 11i of the rotating cam 11, or is exposed further downward, and the butt 4b of the knitting needle 4 retracted by the lowering cam surface 11a of the rotating cam 11. The stitch can be stabilized by acting on.

  FIG. 4 shows a left side view, a plan view, and a front view of the sliding cam 12 used in the mountain cam apparatus 10 of FIG. When the rotating cam 11 is provided with the protrusion 11f as shown in FIG. 2, it is necessary to provide the guide groove 12d. The support surface 12c is provided with a bolt hole 12e and a pin hole 12f for connecting to the drive member 40 and the guide member 41 shown in FIG.

  FIG. 5 shows a plan view and a front view of the rotary cam 11 and the guide member 13 used in the mountain cam apparatus 10 of FIG. (A) shows the structure of the rotating cam 11. Instead of providing the protrusions 11e and 11f on the back surface side of the rotating cam 11, a roller or the like may be provided. (B) shows the configuration of the guide member 13. The guide member 13 is formed with a bolt hole 13e and a pin hole 13f at positions corresponding to the bolt hole 12e and the pin hole 12f of the sliding cam 12 shown in FIG.

  FIG. 6 shows a part of a mechanism for driving the mountain cam apparatus 10 of FIG. The combination of the rotating cam 11, the sliding cam 12, and the guide member 13 is provided on the surface side of the main plate 30 as shown in FIG. The drive member 40 is provided on the back side of the main plate 30, and the guide member 41 is accommodated in a guide groove 31 formed in the main plate 30. The guide member 41 is biased by a spring 42 to the side where the scale value is minimum, that is, the side where the pull-in amount is minimum. The roller 43 provided at the end of the drive member 40 is guided by a spiral cam (not shown), and is driven so that the guide member 41 is displaced along the guide groove 31 and the degree value changes. The A drive mechanism for rotating a helical cam is disclosed in Patent Document 1.

  By using such a drive mechanism, for example, the degree value and the lowering angle θ can be interlocked as follows.

  The relationship between the scale value and the lowering angle θ shown in Table 1 is an example that can be variously set depending on the shape of the rotation guide groove 32. In this embodiment, a rotation mechanism that mechanically interlocks the degree value and the lowering angle θ is provided, but the degree value and the lowering angle θ may be changed independently. Since the rotation guide groove 32 in the embodiment is provided in the cam plate 33 that is separate from the base plate 30, the lowering angle θ can be adjusted independently of the degree value by moving the cam plate 33. The lowering angle θ of the rotary cam 11 can be directly changed using a rotary actuator or the like instead of such a cam. If the degree value and the lowering angle θ can be changed independently, the setting is changed to an appropriate combination of the degree value and the lowering angle θ according to the characteristics of the knitting yarn 5 and the knitted fabric is knitted. Can do.

4 Knitting needle 4b Butt 3 Hook 10 Degree cam device 11 Rotating cam 11a Lowering cam surface 11b Rotation center 11c, 11d; 13c, 13d Arc surface 11h, 12e Degree determining portion 11i, 12a Stabilizing cam surface 12 Sliding cam 12c 13 Guide member 20 Carriage 30 Base plate 31 Guide groove 32 Rotation guide groove

Claims (4)

Mounted on the flat knitting machine's carriage and tilted so as to retract the knitting needle in the direction of withdrawal from the mouth, a determining unit for determining the retracting amount of the knitting needle after the tilting of the lowering cam surface is finished, and the knitting needle In the degree cam device, which has a stabilizing cam surface that stabilizes the stitch in the retracted state, and can adjust the stitch value corresponding to the pulling amount of the knitting needle,
The lower cam surface as a part of the outer shape, and on the inner side, an inner arc surface corresponding to at least a part of arcs of different diameters with a common center of rotation provided inside the determination portion A rotating cam that has a void that includes an outer arc surface in its outline, and is rotatable so that a lowering angle at which the lowering cam surface is inclined with respect to the traveling direction of the carriage can be changed;
A sliding cam having a supporting surface for supporting the rotating cam and capable of sliding along a predetermined reference angle of the downward angle corresponding to the degree value;
The rotating cam supported by the supporting surface of the sliding cam is accommodated in a space of the rotating cam, and has arc surfaces corresponding to an inner arc surface and an outer arc surface of the contour of the cavity, respectively, A guide member that guides the rotation of the rotating cam while in contact;
A rotating mechanism that rotates the rotating cam supported by the supporting surface of the sliding cam and guided by the guide member;
A degree cam apparatus characterized by including. The degree determining portion and the stabilizing cam surface are provided in the sliding cam,
The degree cam apparatus according to claim 1. The degree determining unit has an arc part centered on the rotation center, and determines the degree at the arc part.
The degree cam apparatus according to claim 1 or 2, characterized in that The carriage is formed with a linear sliding guide groove that guides the sliding cam to slide along the reference lowering angle,
The rotation mechanism is
The carriage has a rotation guide groove that is formed so as to be substantially parallel to the sliding guide groove and includes a portion in which the distance from the guide groove changes.
The rotation cam is interlocked with the sliding cam by guiding a part of the rotation cam with the rotation guide groove.
The degree cam apparatus according to any one of claims 1 to 3.

Images