JPS6229504Y2 - - Google Patents

Description

[Detailed description of the invention] This invention makes the inner surfaces of the stitch cam and receiving cam match the inner curved surface of the cam box, and also cuts a lead groove in the stitch cam mounting position in the cam box in accordance with the needle retraction angle of the stitch cam. This invention relates to a cam box for a circular knitting knitting machine in which a guide piece sliding portion of a stitch cam is inserted into the lead groove.

The quality of knitted fabrics knitted with a circular knit stockinette machine largely depends on the uniformity of the stitches and plate length (complete separation of both yarns when using front and back yarns), and the size of the stitches. The length is mainly determined by the position setting of the stitch cam, and the majority of plate length is determined by the needle retraction angle of the stitch cam relative to the tying position of both threads.

Therefore, when knitting tights, etc., which require a greater variation in fabric width, the desired fabric width is obtained by frequently changing the position of the stitch cam, as shown in Figures 1 and 2. As shown in the figure, in the conventional Cambox Sui, the Stitch Camro is fixed to the sliding part of the guide piece 2 by screws and bolts together with the receiving cam on the inner side of the Cambox Sui, and the guide piece 2 is fixed to the sliding part of the guide piece 2 from the outside surface of the Cambox Sui. It is fixed to the sliding part E by the wa. Then, the sliding part H is inserted into a groove provided vertically in the vertical direction of the cam box slide, and the guide piece N is always urged upward by a spring and placed in a state where it is pulled upward. Furthermore, due to the operating lever whose tip is in contact with the guide piece 2, a force is applied to push the guide piece 2 downward against the biasing force of the spring in response to a command from a control device (not shown). The sliding portion E is configured to slide up and down in the groove by being added to the groove. During knitting with the circular knitting machine configured as described above, the knitting needles move horizontally from the direction of arrow It descends and is guided to the receiving camshaft, where the thread is completely drawn in and the stitch length is determined.

For example, if you want to make the grain coarser next time, the actuating lever will be actuated by a command issued from the control device and the guide piece N will be pushed down against the biasing force of the spring, so that the sliding part H fixed to the guide piece N will As it is guided into the groove and lowered, the stitch cam and receiving cam also move downward as shown by the dashed line in FIG. 3. Therefore, the position where the knitting needle contacts the needle retracting slope ri of the sewing machine and starts descending is in a state where the stitches are denser than that, that is, it moves from the position A1 where it contacts the slope ri from the arrow X direction to A2. This results in a difference in a.

In other words, the position at which the knitting needle starts to be drawn is advanced by a from the direction of the arrow X due to the stitching mechanism lowering in the axial direction of the knitting needle, and the yarn drawn in by this knitting needle is fed from the fixed yarn feeder. Therefore, when the stitch strength changes, the correlation between the knitting needles and the threads cannot maintain a constant knitting state.Especially in tights, etc., the stitch strength has to be changed by a large amount (fabric width) in order to fit the shape of the foot when worn. Therefore, the current situation where the supply of yarn is fixed in response to changes in yarn thread length causes disturbances in the plate length.

On the other hand, if the stitch density is made even coarser, the stitch kamuro will fall further and the difference in a will become more noticeable, which will make it difficult for the back yarn to be drawn into the knitting needles, which will cause the yarn to stick to the back side of the stitches, which will increase the defective rate of knitted fabric products. Was.

Therefore, an object of the present invention is to completely eliminate this drawback, and embodiments of the present invention will be described below with reference to FIGS. 4 to 6.

First, in FIG. 4, the stitch cam 2 and the receiving cam 3 on the inner side of the cam box 1 have inner surfaces that match the inner curved surface of the cam box 1, and are attached to the sliding portion 5 of the guide piece 4 from the inside as in the known method. It is fixed by screws 10 and 11, and the guide piece 4 is attached to the sliding part 5 from the outer surface of the cam box 1 by screws 12 and 1.
It is fixed by 3. Also, the mounting position of the stitch cam 2 in the cam box 1 is as shown in Figures 4 and 5.
As shown in the figure, the inclination angle of the stitch cam 2,
That is, a lead groove 6 is cut with the needle retraction angle L as the lead angle. Both sides of the sliding part 5 are cut to match the lead angle, and
It is inserted into the lead groove 6 as shown in FIG.
Furthermore, the method for biasing the sliding portion 5 upward and the method for sliding it downward are based on the spring 7 acting on the guide piece 4 fixed to the sliding portion 5 and the operating lever 8, as in the conventional known technology. It is done by folding.

According to this embodiment, the knitting needle comes into contact with the inclined portion 9 from the direction of the arrow Y and descends to draw in the yarn. However, when the stitch cam 2 is lowered by the operating lever 8 in order to increase the stitch density, the guide piece 4 slides. It slides along the lead groove 6 and its outer periphery together with the part 5, and moves obliquely along the needle retraction angle L, as shown by the dashed line in FIG.

Therefore, the lowering start position of the knitting needle does not change at all in the axial direction of the knitting needle, and the correlation between the knitting needle and the thread remains constant. In addition, in the present invention, the cutting groove provided in the cam box is not limited to a lead groove as long as it is a groove that allows the sliding part of the guide piece to slide in a direction that matches the retraction angle of the knitting needle. If the guide piece sliding part also slides smoothly in the groove, a gap is provided between the sliding surface of the guide piece sliding part and the groove surface of the lead groove. Alternatively, a pin may be installed on the sliding surface of the guide piece so that the tip of the pin slides on the groove surface of the lead groove, or an elastic body such as a leaf spring may be fixed to the sliding surface of the sliding portion of the guide piece. ,
It goes without saying that the elastic body may slide on the groove surface of the lead groove.

As explained in detail above, the present invention makes the inner surfaces of the stitch cam and the receiving cam match the inner curved surface of the cam box, and also installs the stitch cam at the mounting position of the stitch cam in the cam box diagonally up and down in accordance with the needle retraction angle of the stitch cam. By cutting a groove in which the guide piece slides and inserting the guide piece sliding part of the stitch cam into the groove, the positional relationship between the knitting needle and the thread can be maintained constant when the stitches change. Since the inner arc of the receiving cam matches the inner curved surface of the cam box, there is no change in the contact between the stitch cam and the receiving cam and the cam box, and once the relative position between the stitch cam and the yarn feeder is determined, it is stable and constant. By making it possible to maintain the knitting state of the knitting, and to be able to respond to any degree of coarseness or density required without any adverse effects not only from the quality of the product but also from the knitting and weaving aspects, the plate length is not disturbed, yet the knitting is fine. The back yarn is not exposed on the back side of the fabric product, and a product with extremely high quality and high added value can be obtained.The effect of this method is that it solves the drawbacks of conventional knitting machines that required skill and long hours of effort to adjust. It's large.

[Brief explanation of the drawing]

Figure 1 is a front view of the conventional stitch cam mounting position seen from inside the cam box, Figure 2 is a plan view of Figure 1, Figure 3 is an internal development view of the main part of the cam in Figure 1, and Figure 4 is the main part of the cam box. A front view of the stitch cam mounting position seen from the inside of the cam box in the invented example,
Figure 5 is an internal development view of the main part of the cam in Figure 4;
The figure is a sectional view taken along the - line in FIG. 4. 1...Cambox, 2...Stitchcam, 3
...Receiving cam, 4...Guide piece, 5...Sliding part,
6...Lead groove.

Claims (1)

[Scope of utility model registration request] The inner surfaces of the stitch cam and receiving cam are made to match the inner curved surface of the cam box, and a lead groove is cut in the stitch cam mounting position in the cam box in accordance with the needle retraction angle of the stitch cam, and the guide piece sliding part of the stitch cam is fitted into the lead groove. Camboxes for circular knitting stockinette machines.