JPS6236877Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a knitted fabric width adjusting device for a circular knitting machine, especially a needle dial having a plurality of radial needle grooves on the upper surface and a needle having a plurality of needle grooves parallel to the axial direction on the outer periphery. Knitting on a CAMBOX rotary circular knitting machine in which a knitting needle is inserted into each needle groove at an arbitrary angle position of the cylinder, and this is the knitting needle insertion range, and the remaining needle grooves are set as the knitting needle non-insertion range, where no knitting needles are inserted in advance. Related to ground width adjustment device.

As shown in Japanese Patent Application Laid-Open No. 149950/1983, a conventional device of this type includes a yarn switching section having a plurality of yarn paths, and a device that collectively cuts and grips a plurality of knitting yarns supplied from the yarn paths. Some devices are equipped with a yarn feeding device consisting of a cutting and gripping section, but in this type of device, the yarn is repeatedly gripped each time the knitting yarns that have been gripped in bulk are switched, so the yarn gripped only by the gripping force may wear out. This phenomenon is particularly noticeable when knitting yarns of different materials or yarns of different thicknesses are used together, and the equipment required to adjust the fabric width is complicated. Because it was large and the space was small, it required considerable skill and work time.

Furthermore, the cut yarn ends of the knitting yarn that occur at the beginning and end of knitting are pulled as the knitting progresses and come off the yarn cutting and gripping device. When a certain stiff yarn comes off, it jumps up, goes around the outside of the cylinder, and is knitted onto the adjacent knitting needle at the knitting cam position, creating a so-called double-bite condition, making it impossible to knock over or clear, and finally. This caused breakage of knitting needles and damage to the blade.

This invention was made with the aim of eliminating these drawbacks, and includes a change point at which the knitting needle is inserted into a knitting needle non-insertion range;
The present invention relates to a device that can actuate and deactivate a yarn end cutting/holding device at a change point when moving from a knitting needle non-insertion range to a knitting needle insertion range, and can quickly and easily change the knitted fabric width.

The present invention will be explained below based on the drawings. In order to facilitate understanding, a Cambox rotary circular knitting machine of this invention is shown in Fig. 1. 1 is a cord cable, 2
3 is the cheese-wrapped knitting yarn, 3 is the top table,
4 is a yarn end cutting and gripping device of the present invention, 5 is a dial plate, 6 is a needle cylinder, 7 is a knitted fabric, 8
is a cut thread end suction device.

FIG. 2 is a developed view of the inner surface of the cylinder cam box S, in which A shows the knitting start part, B shows the knitting end part, 9 shows the knitting needles, and 10 shows the yarn end suction port of the cut yarn end suction device 8. Arrow A indicates the direction of rotation of the cylinder cam box.

However, the yarn end cutting and gripping device 4 of the present invention has a third
4, it is provided in parallel with a conventional yarn feeding device 11 consisting of a yarn switching section 11a and a cutting grip section 11b, and the lower end of the joint 12 is fixed to the dial plate 5 via a retainer 13. Trapper 15 and scissors 16 of the thread end cutting grip section 14
The movable plate 16a is connected to the movable plate 16a. The yarn end cutting grip part 14 is connected to a trapper 15 as shown in FIG.
Scissors 1 also includes a movable plate 16a and a fixed plate 16b.
The movable plate 16a of the trapper 15 and the scissors 16 is swingably supported by a common shaft 17, and the other ends 15a and 16c are connected to the lower end of the joint 12 via the retainer 13. .

The other end of the joint 12 connects one end to a top gear 18 built into the top table.
The plate 19 is fixed to the slit of a swing bar 21 which is supported by a shaft 20 with a screw 22 through the plate 19, and a bent part of an L-shaped arm 23 is supported by a shaft 24, and a roller 25 is attached to one end of the plate 19. However, the other end is connected to a rod 27 via a retainer 26, and the other end of the rod 27 is connected to a swing bar 21 via a retainer 28.
7 and the L-shaped arm 23 constitute an operating rod of the yarn end cutting and gripping device 4. Note that 29 in FIG. 4 is a needle dial. Further, as shown in FIG. 3, the yarn feeding device 11 has an upper portion fixed to a top gear 18,
The top gear 18 and the dial plate 5 rotate together with the yarn end cutting and gripping device 4.

2 and 6, the roller 25 attached to one end of the L-shaped arm 23 is inserted into a dovetail groove 30 provided on the underside of the top table 3, and loosely fitted into a cam groove 32 of an annular cam rail 31 fixed by a screw or other suitable means. The cam groove is aligned with the knitting start portion A shown in FIG.
An operating cam groove X is configured to push up the roller 25 at the change point where the knitting needle non-insertion range changes to the knitting needle insertion range, and an operating release cam groove Y is configured to push down the roller 25 at the knitting end portion B, i.e., the change point where the knitting needle insertion range changes to the knitting needle non-insertion range.

Note that the annular cam rail 31 can be rotated as appropriate within the dovetail groove by releasing the fixation using screws or the like.

The cut yarn end suction device 8 shown in FIG. 1 consists of a blower 33 and a dust hose 34, as shown in FIG. The suction pipe 35 branches into a suction pipe 36, the tip of which extends inside the needle cylinder 6, and the suction pipe 35 extending to the knitting start part A is shown in FIG. 9, and the suction pipe 36 extending to the knitting end part B is shown in FIG. As shown, suction ports 10 are opened at positions close to the knitting needles 9, respectively.
Note that 37 in FIG. 8 is a striping jack.

Therefore, when the knitting is now completed and the yarn feeding device 11 and the yarn end cutting and gripping device 4 reach the knitting end portion B, that is, the change point where the knitting needles are moved from the knitting needle insertion range to the knitting needle non-insertion range, the yarn end cutting and gripping device 4 The roller 25 is pushed down by the operating cam groove Y on the cam rail 31, operates the operating rod, closes the movable plate 16a of the trapper 15 and the scissors 16, grips and cuts the knitting yarn extending from the yarn feeding device 11, and cuts the knitting yarn at the end of knitting. The yarn end is sucked into the yarn end suction port 10 of the cut yarn end suction device 8, while the yarn end extending from the yarn feeding device 11 passes through the knitting needle non-insertion range while being held by the trapper 15.

Next, when reaching the knitting start point A, that is, the change point where the knitting needle is not inserted into the knitting needle insertion range,
The roller 25 of the yarn end cutting and gripping device 4 is pushed up by the actuation release cam groove X on the cam rail 31,
The movable plate 16a of the trapper 15 and scissors 16 is opened by operating the actuating rod, and knitting is started at the same time as the grip on the yarn end extending from the yarn feeding device 11 is released, and the yarn end is sucked into the yarn end suction port 10. Ru.

As can be easily understood from the above explanation, in the device of the present invention, when changing the knitted fabric width, the knitting needle non-insertion range is increased or decreased, and at the same time, the cam rail that loosely fits the roller of the yarn end cutting and gripping device is In addition to being able to cut and hold the knitting yarn at the end of knitting, it can be carried out at any time by simply moving the positions of the operating cam groove and the release cam groove to positions corresponding to the new knitting start position and knitting end position. This makes the movement to the starting point of knitting quick and easy, and by suctioning the cut yarn ends into the suction port, it is ensured that the yarn ends are prevented from being knitted, that is, double weaving, and the knitting yarns are not repeatedly switched. This can also be prevented by using the cutting and gripping section of the yarn feeding device as appropriate, depending on the frequency of switching, the type and number of knitting yarns used, etc. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory front view of a cam box rotary circular knitting machine, Fig. 2 is an explanatory view of the invented device with the cylinder cam box developed, Fig. 3 is a front view of the yarn end cutting and gripping device and the yarn feeding device, Figure 4 is a side view of the yarn end cutting and gripping device, Figure 5 is a perspective view of the yarn end cutting and gripping section, and Figure 6 is an explanation showing the fitting relationship between the top table, cam rail, and operating rod of the yarn end cutting and gripping device. Figure 7 is a perspective view showing the main parts of the cut yarn end suction device, Figure 8 is an explanatory diagram showing the relationship between the knitting needles at the end of knitting and the yarn end suction port, and Figure 9 is a diagram showing the relationship between the knitting needles and the yarn end suction port at the beginning of knitting. FIG. 3 is an explanatory diagram showing the relationship between yarn end suction ports. A... Knitting start section, B... Knitting end section, X... Operation release cam groove, Y... Operation cam groove, 3... Top table, 4... Yarn end cutting and gripping device, 5... Dial plate, 9...knitting needle, 10...yarn end suction port,
11... yarn feeding device, 15... trapper, 16...
...Scissors, 18...Top gear, 31...Cam rail, 33...Blower, 35, 36...Suction pipe.

Claims (1)

[Scope of utility model registration request] A needle dial has a plurality of radial needle grooves toward the axial center on the upper surface, and a needle cylinder has a plurality of needle grooves parallel to the axial direction on the outer periphery.Knitting needles are inserted into each needle groove at an arbitrary minute position. In a cam box rotary circular knitting machine, this is defined as the knitting needle insertion range, and the remaining needle grooves are set as the knitting needle non-insertion range in which knitting needles are not inserted in advance, the cam box is equipped with a yarn feeding device that rotates together with the cam box, and one end of the operating rod is equipped with a yarn feeding device that rotates together with the cam box. A trapper and a thread end cutting/holding device having a scissor portion and a roller at the other end are provided, and the roller of the thread end cutting/holding device is loosely inserted into a cam groove of an annular cam rail fixed to a dovetail groove provided on the underside of the top table. At the change point where the cam rail is inserted and moves from the knitting needle insertion range to the knitting needle non-insertion range, there is an operating cam groove that contacts the roller of the yarn end cutting and gripping device to operate the device. A knitted fabric width adjusting device for a circular knitting machine, characterized in that actuation release cam grooves for contacting the rollers and canceling the operation of the device are provided at change points where the range changes.