阅读说明：本技术 无梭织机的纬纱切断装置 (Weft cutting device for shuttleless loom ) 是由 卢西亚诺·科瑞恩 于 2019-09-12 设计创作，主要内容包括：无梭织机的纬纱切断装置,其放置在一侧的织物边缘(1)、梳(2)和经口与另一侧的纬纱选择机构之间,来自多个孔眼(5、6、7、8、9、10、11、12)的纬纱在位于织物边缘(1)及织物形成所在的梳(2)的打纬线处的顶点(V)处结合。特别地,该装置由具有切割边缘的旋转盘(19)组成,旋转盘(19)通过使其保持旋转的马达(18)和通过设置有偏心轮(17’)的旋转轴(17)控制铰接杆(15)的动作的步进控制马达(25)来切断纬纱,杆(15)配置成相对于步进控制马达(25)的纵轴(26)摆动。杆(15)的一端以两个臂(13,14)的形式成形,这两个臂(13,14)分别搁置在两个弹性板(20,21)的表面上,并且,杆(15)的另一端还与偏心轮(17’)相连。(Weft cutting device for shuttleless looms, placed between the fabric edge (1) on one side, the comb (2) and the selection means of the weft on the other side and the transom, the weft coming from a plurality of eyelets (5, 6, 7, 8, 9, 10, 11, 12) being joined at the vertex (V) located at the fabric edge (1) and at the beat-up line of the comb (2) where the fabric is formed. In particular, the device consists of a rotating disc (19) with a cutting edge, the rotating disc (19) cutting the weft yarn by means of a motor (18) keeping it rotating and a step-control motor (25) controlling the action of an articulated lever (15) by means of a rotating shaft (17) provided with an eccentric (17'), the lever (15) being arranged to oscillate with respect to the longitudinal axis (26) of the step-control motor (25). One end of the rod (15) is shaped in the form of two arms (13,14), the two arms (13,14) resting on the surfaces of two elastic plates (20,21), respectively, and the other end of the rod (15) being also connected to an eccentric (17').)

1. A weft cutting device for shuttleless looms, placed between a fabric edge (1) on one side, a comb (2) and a weft selection mechanism of the transom and the other side, having a plurality of eyelets (5, 6, 7, 8, 9, 10, 11, 12) for guiding the weft yarns coming from the eyelets (5, 6, 7, 8, 9, 10, 11, 12) and joined at an apex (V) located at the fabric edge (1) and at the beat-up line of the comb (2) where the fabric is formed, characterized in that: the cutting device consists of a rotating disc (19) with a cutting edge, the rotating disc (19) being configured to cut the weft yarn by means of a motor (18) keeping it rotating and a step-control motor (25) controlling the action of an articulated lever (15) by means of a rotating shaft (17) provided with an eccentric (17 '), the articulated lever (15) being configured to oscillate with respect to the longitudinal axis (26) of the step-control motor (25), one end of the lever (15) being shaped in the form of two arms (13,14), these two arms (13,14) resting respectively on the surfaces of two elastic plates (20,21), and the other end of the lever (15) being further connected to the eccentric (17').

2. Cutting device according to claim 1, characterized in that the step control motor (25) has a proximity sensor (28) for detecting the position of the shaft (17) and the lever (15), and that the step control motor (25) is equipped with a software program for controlling one or more encoders to command the stages of the cutting sequence of the weft thread.

3. Cutting device according to at least one of the preceding claims, characterized in that each weft thread (7') is gripped by a gripping means (23) and pushed between the elastic plate (20,21) and the two arms (13,14) of the rod (15).

4. The cutting device according to at least one of the preceding claims, characterized in that the one of the two arms (13,14) of the lever (15) located on the side facing the fabric (1) has a tooth (27), said tooth (27) holding the weft thread (7 ') in the vicinity of the rotating disc (19) until the lever (15) can lower the weft thread (7') by swinging the eccentric (17 '), whereby the weft thread (7') is clamped between the elastic plate (20,21) and the arm (13,14) at the side of the rotating disc (19).

5. The cutting device according to claim 4, characterized in that the lever (15) causes the cutting of the weft thread (7 ') by pushing the weft thread (7') between two gripping points, which are close to each other and located near the blades of the rotating disc (19).

6. Cutting device according to claim 2, characterized in that the software program controls the oscillation of the lever (15) with programmed cycles and times, which are different for each weft yarn (7').

7. Cutting device according to at least one of the preceding claims, characterized in that after cutting off the weft thread (7 '), the lever (15) lifts the arms (13,14) from the surface of the elastic plate (20,21) to leave space for the re-entry of the inserted weft thread (7 ') and returns to a standby position awaiting the next cycle of inserting a weft thread (7 ').