CN-224212886-U - Weft yarn shearing device for rapier loom

CN224212886UCN 224212886 UCN224212886 UCN 224212886UCN-224212886-U

Abstract

The utility model relates to a weft yarn shearing device for a rapier loom, which consists of a body support, a shearing mechanism and a suction positioning mechanism. The cutting mechanism comprises a swing arm and a cutting base, the swing arm is fixedly connected with a body support through a beating screw shaft, a roller is connected with the swing arm through a bearing, a chute is arranged at the front end of the swing arm, a cutting chuck is fixedly connected with the chute, the cutting chuck and a cutting clamping piece jointly clamp a blade to form a cutting assembly, the cutting base is fixedly connected with the body support through two long grooves and can move up and down to adjust the position of the cutting base, a cutter pad which is configured with the blade is fixedly connected with the cutting base, a weft yarn locating piece is fixedly connected with the outer side of the cutter pad, a spring is arranged between the swing arm and the cutting base, and the suction locating mechanism comprises a suction box body, a suction chamber cover plate and a yarn guide plate. The utility model has the characteristics of simple structure, convenient and reliable adjustment, wide application range and the like.

Inventors

WANG JIEJING

Assignees

王洁静

Dates

Publication Date: 20260508
Application Date: 20250429

Claims (2)

1. Weft yarn shearing device for rapier loom, characterized in that: The cutting mechanism comprises a swing arm and a cutting base, the swing arm is fixedly connected with the body support through a driving screw shaft, a roller is connected with the swing arm through a bearing, a sliding groove is formed in the front end of the swing arm, a cutting chuck is fixedly connected with the cutting chuck through the sliding groove, a blade is clamped by the cutting chuck and the cutting clamping piece together to form a cutting assembly, the cutting base is fixedly connected onto the body support through two long grooves and can move up and down to adjust the position of the cutting base, a cutter pad configured with the blade is fixedly connected onto the cutting base, a weft yarn locating piece is fixedly connected onto the outer side of the cutter pad, and a spring is arranged between the swing arm and the cutting base.
2. Weft yarn cutting device according to claim 1, characterized in that: The suction positioning mechanism comprises a suction box body, a suction chamber cover plate and a yarn guide plate, wherein the suction box body is fixedly connected to a body support through a strip-shaped chute arranged at the rear part, the suction box body can move up and down to adjust the upper and lower height positions of the suction box body, the suction box body is of a hollow box body structure, a lateral surface opening is an outdoor suction port and is connected with an external suction device, a 1/4 gap is formed in the upper opening of the suction box body, the upper surface of the suction box body is fixed with the suction chamber cover plate, a suction hole is formed after the suction chamber cover plate and the suction chamber cover plate are fixedly connected, an arc yarn guide finger is arranged at the front end of the suction chamber cover plate and can guide weft yarn to smoothly enter the suction hole, a yarn guide plate is vertically arranged at the front end of the suction box body, the working end of the yarn guide plate is provided with an upper yarn guide cambered surface and a lower yarn guide cambered surface, the two yarn guide cambered surfaces are arranged at a certain angle and are arranged in parallel and staggered mode, and the lower yarn guide cambered surface rear part of the yarn guide plate is provided with a yarn guide hook.

Description

Weft yarn shearing device for rapier loom Technical Field The utility model relates to a weft yarn shearing device for a rapier loom, belonging to the rapier loom technology. Background In the existing rapier loom technology, weft yarns are pushed to a weaving port by a reed and simultaneously are pushed into weft yarn cutting ports, at the moment, one end of each weft yarn is fixed at the weaving port, the other end of each weft yarn is held by a weft yarn spool, when weft yarns are inserted next time, a rapier moves along a rapier moving track and captures the weft yarns, the weft yarns are cut by a cutting device after the rapier captures the weft yarns, the second weft insertion is started, time adjustment of the weft yarns of the scissors is critical, weft cutting time is early, weft cutting is easy to occur due to weft cutting stop, and the rapier are damaged easily due to late weft cutting time. In addition, in the prior art of the rapier loom, the weft feeding side is usually in a tension state at about 70 degrees when the weft feeding side is sheared, namely between 0 and 70 degrees before the weft is inserted and sheared by the second rapier head, particularly, the weft is captured by the rapier head for a period of time, the tension difference between the left side and the right side of the whole fabric is easily caused under the tension action of the weft and the warp opening, particularly, the carbon fiber fabric is produced, the friction coefficient of the carbon fiber material is small, and the tension change of the whole product is more easily produced during production. Disclosure of utility model The aim of the utility model is to achieve a weft cutting device for reliable operation on a rapier loom, which not only overcomes the above-mentioned drawbacks, but also makes it possible to reduce the waste of slitter edge yarns. The utility model aims at achieving the following technical scheme, and the device comprises a body support, a shearing mechanism and a suction positioning mechanism. The shearing mechanism comprises a swing arm and a shearing base, the swing arm is fixedly connected with the body support through a beating screw shaft, the roller is connected with the swing arm through a bearing, the front end of the swing arm is provided with a sliding groove, the front end of the swing arm is fixedly connected with a shearing chuck through the sliding groove, and the shearing chuck and the shearing clamping piece jointly clamp the blade to form a shearing assembly. The shearing base is fixedly connected to the body support through two long grooves and can move up and down to adjust the up and down position of the shearing base. The shearing base is fixedly connected with a cutter pad which is configured with the blade, and the outer side of the cutter pad is fixedly connected with a weft yarn positioning sheet. A spring is arranged between the swing arm and the shearing base. The suction positioning mechanism comprises a suction box body, a suction chamber cover plate and a yarn guide plate, wherein the suction box body is fixedly connected to a body support through a strip-shaped chute arranged at the rear part and can move up and down to adjust the vertical height position of the suction box body, the suction box body is of a hollow box body structure, a lateral surface opening is an outdoor suction port and is connected with an external suction device, a 1/4 gap is formed in the upper surface of the suction box body, the upper surface of the suction box body is fixed with the suction chamber cover plate, and suction holes are formed after the suction box body and the suction chamber cover plate are fixedly connected. The front end of the cover plate of the suction chamber is provided with an arc yarn guiding finger which can guide weft yarn to smoothly enter the suction hole. The suction box front end vertical installation yarn guide plate, the work end of yarn guide plate be equipped with and go up yarn cambered surface and lower yarn cambered surface, two yarn cambered surfaces are certain angle, preferential 45 degrees settings, and two cambered surfaces parallel stagger and arrange. The rear part of the lower yarn guiding cambered surface of the yarn guiding plate is provided with a yarn guiding hook. The invention has the main advantages that the whole weft yarn shearing device is arranged on the weft-entering side and is close to the selvedge of the fabric as much as possible, so that the shearing opening and the selvedge of the fabric are kept at a very small distance, the effect of no waste edge is achieved, and the material loss is reduced. Meanwhile, after the weft yarn is driven into the weaving port, the swing arm drives the blade to instantly cut the weft yarn, the end part of the weft yarn is immediately captured and held by the suction port of the suction box body, and the weft yarn cannot interfere with the previous weft yarn when the rapier head is used for weft in