JPH0551986U - Weft processing equipment - Google Patents

Abstract

(57) [Summary] [Structure] Between the weft insertion side end of the cloth 2 and the weft thread selecting device 7, the cutter 4 and the gripper 5 are arranged substantially on the extension line of the cloth fell 3, and the cutter 4 and the gripper 5 are arranged. A suction nozzle 6 for sucking and holding a plurality of weft yarn ends before weft insertion is provided between the wefts, and the weft yarn selected by the weft yarn selecting device 7 is gripped by the gripper 5 after the beating, and the gripping state is obtained. Is cut by the cutter 4 and the gripper 5 releases the grip between the cutting and the next weft insertion, and the cut end of the weft yarn is suction-held by the suction nozzle 6. [Effect] It is possible to maintain tension of the weft thread end that has been wefted without forming a waste ear that is a loss of the weft thread, and improve the quality of the woven fabric.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a weft thread processing device which is disposed on the weft insertion side of a rapier loom and which grips and cuts the weft thread that has been wefted.

[0002]

[Prior Art]

 Conventionally, in order to prevent the edge of the fabric from being crimped, Provide entangled yarn on the outside of the cloth edge,  This entangled thread was designed to hold the weft thread in which it was put. However, the weft ends held by this entangled yarn are cut off from the end and discarded as the discarding ears of the woven fabric. This was a loss of weft. In order to solve this problem, there is a conventional weft yarn processing apparatus which holds the weft yarn end without forming a waste selvage and is disclosed in Japanese Patent Application Laid-Open No. 3-124844. This is used for selecting two kinds of weft threads with a weft thread selection device. Between the weft thread selection device and the weft insertion side end of the cloth, The upper and lower grippers, which are vertically movable and urged in the direction of the intermediate position, are provided facing each other in the vertical movement direction. The slider with the gripping part interposed between the upper and lower gripping bodies is cammed, Cam follower, It can be moved up and down by mechanical driving means such as a motor, The grip of this slider is Abutting both grippers when in an intermediate position from both grippers, When located on the side of one gripper, an opening is formed between the other gripper and The gripping part of the slider and the upper and lower gripping bodies constitute two grippers corresponding to two kinds of weft threads, Attach a movable blade integrally to the cloth side surface of the slider, With this movable blade, Two types of weft threads and two corresponding cutters are configured with the upper and lower fixed blades fixed at positions close to the upper and lower grippers, The drive means for the slider is When the weft thread selected by the weft thread selection device is beaten, Move the slider,  The open part is formed with one gripper corresponding to this weft thread, After beating, move the slider in the opposite direction to grasp the weft thread that has entered the opening, In addition, move the slider in the opposite direction and cut it with the one cutter corresponding to this weft thread in the gripped state. The grip of the end of the cut weft yarn on the weft insertion side was configured to be continued by the gripper until the weft yarn was reloaded.

[0003]

[Problems to be solved by the device]

 In the conventional weft thread processing device, the weft thread selected by the weft thread selection device is kept gripped by the gripper after the beating and until the weft thread is re-inserted. Therefore, it was necessary to provide a plurality of grippers and cutters corresponding to the number of a plurality of weft threads, resulting in a complicated device with a large number of parts. The gripper and cutter are opened and closed according to the weft thread selection order. Therefore, when changing the weft thread selection order, change the cam that affects the gripper and cutter opening and closing operations, A device for mechanical control was required.

Further, the above-mentioned conventional weft thread treating device is used when selecting two kinds of weft threads. When using this, for example, when selecting four kinds of weft threads, upper and lower grippers and upper and lower cutters are used. It is necessary to arrange the above-mentioned weft thread treating device comprising two stages in the vertical direction, and to move the weft thread treating device itself up and down according to the selection of the weft thread, which is complicated in structure and space- and cost-effective. However, there is a problem in that it is not practically possible to use this conventional weft thread treating device when selecting three or more kinds of weft threads.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, the weft thread selected by the weft thread selecting device is weft-inserted from a plurality of weft threads, and the weft-insertion side part of the weft thread is beaten at the time of beating, and the gripper in the open state and the weft-insertion side end of the cloth In the weft yarn processing device, which is guided by the cutter in the open state between the gripper and the gripper, and is cut after the beating side is gripped by the gripper, the cutter is placed almost on the extension line of the cloth fell. It is characterized in that the grippers are arranged and a suction nozzle for sucking and holding a plurality of weft yarn ends before weft insertion is arranged between the cutter and the gripper.

[0006]

[Action]

 The weft insertion side portion of the weft threads selected by the weft thread selection device from the plurality of weft threads is guided by the gripper and the cutter during beating, is gripped by the gripper after beating, and is cut by the cutter in this gripping state. It Then, the gripper releases the grip for the next beating operation and becomes in the open state, and the released weft thread end is suction-held by the suction nozzle until the weft thread is selected again and weft-inserted.

[0007]

【Example】

 Next, an embodiment of the weft yarn processing apparatus 1 of the present invention will be described with reference to the drawings. This weft yarn processing apparatus 1 is composed of a cutter 4, a gripper 5, and a suction nozzle 6 which are arranged in parallel on the extension line of the cloth fell 3 of the cloth 2, and the weft insertion side end of the cloth 2 and a well-known weft yarn selection device. It is arranged between the device 7 and the device 7 (shown in FIG. 8). First, the cutter 4 will be described with reference to FIGS. 1, 3 and 4. The cutter 4 is composed of a fixed blade 11 attached to a cutter side guide plate 10 and a movable blade 13 attached to a swing lever 12. The cutter side guide plate 10 is attached to a fixed shaft 14 whose base is fixed to the machine frame 8, and a guide surface 15 formed on the front surface guides the weft thread to a position where the cutter 4 can be cut during beating. It is supposed to do. The swing lever 12 is rotatably supported by the fixed shaft 14 at a substantially central portion thereof via a bearing member 17. One end of a connecting lever 18 is pin-connected to the base of the swing lever 12, and the other end of the connecting lever 18 is pivotally supported on the upper end of a cam lever 19. The cam lever 19 is rotatably supported at its center by a fixed shaft 20 fixed to the machine frame, and has a cam follower 22 attached to the lower end by a tension spring 21 interposed between the upper part of the cam lever 19 and the machine frame 8. It is urged to come into pressure contact with the cam surface of the cutter cam 23. The cutter cam 23 is integrally fixed to a rotary shaft 24 that is rotatably supported by the machine frame 8 and is rotatable by a motor (not shown). Accordingly, the rotation shaft 24 is rotated, and the swing lever 12 is actuated by the action of the cutter cam 23 and the cam follower 22 via the transmission mechanism 25 including the cam lever 19, the connecting lever 18, etc. The movable blade 13 integrated with the swing lever 12 moves from the standby position A shown in FIG. 3 to the cutting position B shown in FIG. 6 to cut the weft thread.

Next, the suction nozzle 6 and the gripper 5 will be described with reference to FIGS. 1, 2, 4, and 7. The suction nozzle 6 is fixed to the machine frame 8 and is located between the cutter 4 and a gripper 5 which will be described later. The suction nozzle 6 has substantially the same shape as the inner surface 15 of the cutter side guide plate 10 on its front surface. A guide portion 28 for guiding the weft yarn during beating is formed. A continuous portion of the upper surface of the guide portion 28 and the suction hole 29 penetrating the center of the suction nozzle 6 serves as a suction port 30, and a suction device (not shown) connected to the upper end of the suction hole 29 constantly causes the suction air flow from the suction port 30. As shown in FIG. 8, a plurality of weft yarn ends before weft insertion are suction-held from the suction port 30 as generated.

A gripper 5 composed of upper and lower grip pieces 32, 33 is provided on the side surface of the suction nozzle 6 on the weft insertion side. First, in FIG. 7, the upper gripping piece 32 has a substantially triangular shape, a guide engaging hole 34 is formed in the center, and an engaging pin 35 that engages with a swing lever 43 described later is formed on the upper side surface. Has been planted. An engagement block 36 is fitted in the guide engagement hole 34 with play in the vertical direction, and the engagement block 36 is screwed to the side surface of the suction nozzle 6 together with the gripper side guide plate 37. Further, the engagement pin 35 swings at a predetermined timing described later by the action of the gripper cam 44 and the cam follower 42 via the transmission mechanism 40 including the cam lever 38 and the coupling lever 39, similarly to the cutter 4. It is loosely fitted in the engaging hole 44 of the moving plate 43. Therefore, the swinging plate 43 swings by the rotational drive of the rotary shaft 24, and the upper gripping piece 32 moves from the releasing position C shown in FIG. 2 to the gripping position D shown in FIG. The lower gripping piece 33 has a support groove 45 formed on the lower surface thereof, and an engaging portion for engaging with an upper wall of a mounting groove 46 formed on the side surface of the suction nozzle 6 on the side surface on the weft insertion side. 47 is formed. A support shaft 48 is loosely fitted in the support groove 45, and the support shaft 48 is screwed together with a positioning member 49. Therefore, the lower gripping piece 33 can be moved in the wedging direction by the positioning member 49 with respect to the suction nozzle 6, and is vertically movable and rotatable about the support shaft 48. Further, a compression spring 50 is interposed between the lower surface of the lower grip piece 33 and the lower wall of the mounting groove 46, and the lower grip piece 33 is biased upward, so that the upper grip piece 32 shown in FIG. When the lower gripping piece 33 is positioned at the release position C as shown in FIG. An opening 51 is formed between the gripping surface 33a of the gripping piece 33. When the upper gripping piece 32 is located at the gripping position D as shown in FIG. 5, the gripping surface 32a of the upper gripping piece 32 is in pressure contact with the gripping surface 33a of the lower gripping piece 33, and the lower gripping piece 33 is compressed by the compression spring 50. It slightly moves downward against the urging force of the upper holding piece 32 and the lower holding piece 33 and holds the weft thread between the holding surfaces 32a and 33a of the lower holding piece 33 in this state. Since the lower gripping piece 33 is rotatably supported by the support shaft 48 with respect to the suction nozzle 6, when gripping a plurality of weft threads between the upper and lower gripping pieces 32, 33, the thickness of these weft threads is Even if they are different, gripping can be performed accurately. Further, a sub-lead 55 shown in FIGS. 9, 10, 11, and 12 is fixed to the reed (not shown), and the sub-lead 55 guides the weft yarn to a position where the gripper 5 and the cutter 4 can grasp and cut when the reed is beaten. ing.

Next, the operation of the weft yarn processing apparatus 1 configured as described above will be described. The weft thread selecting device 7 selects two kinds of weft threads S1 and S2 one by one in order and inserts them. First, as shown in FIG. 8, a weft yarn selection device 7 selects a weft yarn S1 of the two types of weft yarns S1 and S2 whose cut ends are suction-held by a suction nozzle 6 and are moved by a rapier (not shown). It is pulled forward to the position where it intersects the trajectory. Then, the rapier hooks the pulled out weft thread and inserts it in the closed portion of the upper thread and the lower thread. Next, the weft thread S1 that has been wefted is repulsed by a reed (not shown), and at the time of this repulsion, the weft insertion side portion of the weft thread S1 is cut by the sub-lead 55 that is integral with the reed at a cutting position of the cutter 4 in the open state. The beating is completed by being guided by the guide groove 28 of the suction nozzle 6 and the opening 51 of the gripper 5 in the opened state (shown in FIG. 9). Immediately after this beating, the swing lever 43 is swung by the action of the gripper cam 44 that is integral with the rotating rotary shaft 24, and the upper gripping piece 32 of the gripper 5 is moved from the release position C to the gripping position D, The gripping piece 32 presses the lower gripping piece 33 against the biasing force of the compression spring 50, and grips the weft insertion side portion of the weft thread S1 between the gripping surfaces 32a and 33a of the upper and lower gripping pieces 32 and 33 (see FIG. 10). Shown). After that, while the gripper 5 is still held, the swing lever 12 swings by the action of the cutter cam 23, the movable blade 13 of the cutter 4 is moved from the standby position A to the cutting position B, The weft thread S1 is cut between the movable blade 13 and the fixed blade 11. The free end of the cut weft yarn S1 is gripped by the gripper 5 and sucked and held by the suction nozzle 6 (shown in FIG. 11). Then, the weft yarn selecting device 7 selects the other weft yarn S2 and then the gripper Reference numeral 5 forms an opening 51 between the gripping surfaces 32a, 33a of the upper and lower gripping pieces 32, 33 in order to stop gripping by the action of the gripper cam 44 and prepare for beating. Further, the weft thread S1 whose grip is released by the gripper 5 is suction-held by the suction nozzle 6 until the weft thread S1 is selected again. (Shown in Figure 12). The rear weft thread S2 is weft-beaten in the same manner as the one weft thread S1 described above, and then gripped by the gripper 5 before being cut by the cutter 4, and the free end of the weft thread S2 after cutting is the suction nozzle. 6 is suction-held, and the gripper 5 releases the grip after cutting to form the opening 51. The above-described cycle is repeated to woven a woven fabric.

As described above, in the weft yarn processing apparatus 1 of the present embodiment, the weft insertion side portion of the weft yarn selected by the weft yarn selection device 7 is grasped by the gripper 5 after beating and is grasped by this. It is cut by the cutter 4 in this state, and the gripper 5 releases the grip between this cutting and the next weft insertion, and the gripped end of the weft thread is sucked until this weft thread is selected again by the weft thread selection device 7. Since the nozzle 6 sucks and holds it, it suffices to provide only one gripper, one cutter and one suction nozzle for each of the plurality of weft threads, and the number of parts is small and the structure is simple.

Further, since the gripper releasing operation of the gripper is performed in a fixed cycle regardless of the weft thread selection order, two types of weft threads are sequentially inserted as described in the present embodiment. Even if the weft selection sequence is changed from the weft selection sequence to one weft insertion twice and then the other weft insertion once, the gripper (cutter) can be opened and closed as usual. This can be done without changing the acting cam or requiring another device for electrically controlling this opening / closing operation. In addition, in this embodiment, the weft processing device has been described as operating when selecting two kinds of weft threads. However, even when this weft processing apparatus is used when selecting three or more kinds of weft threads, the suction nozzle is There is no problem because the weft threads that have been cut by the cutter and before weft insertion are held by suction.

[0013]

[Effect of the device]

 As described above, in the weft yarn handling apparatus of the present invention, the cutter and the gripper are arranged almost on the extension line of the cloth fell, and the suction nozzle for sucking and holding a plurality of weft yarn ends before weft insertion is provided between the cutter and the gripper. As a result, the weft thread can be held in a tension state without forming a waste ear, and the quality of the woven fabric can be improved. Further, the weft yarn processing apparatus of the present invention can have a simple structure including one gripper, one cutter and one suction nozzle. Even if the weft thread selection order is changed, it is not necessary to change the cams that control the opening / closing operations of the gripper and the cutter and electrically change the opening / closing operations as in the conventional case. Furthermore, it is possible to deal with the case where a plurality of weft threads of three or more types are selected.

[Brief description of drawings]

FIG. 1 is a plan view of a weft yarn processing apparatus of this embodiment.

FIG. 2 is a P view with a part of FIG. 1 omitted.

FIG. 3 is a Q view with a part of FIG. 1 omitted.

FIG. 4 is an R view with a part of FIG. 1 omitted.

FIG. 5 is a diagram showing a gripping state of a gripper.

FIG. 6 is a diagram showing a cutting state of the cutter.

FIG. 7 is a perspective view showing a structure of a gripper.

FIG. 8 is an operation explanatory view.

FIG. 9 is an operation explanatory view.

FIG. 10 is an operation explanatory view.

FIG. 11 is an operation explanatory view.

FIG. 12 is an operation explanatory view.

[Explanation of symbols]

1 weft processing device, 2 cloth, 3 weaving cloth, 4 cutter, 5 gripper, 6 suction nozzle, 7 weft selection device

Claims (1)

[Scope of utility model registration request] 1. A weft insertion side portion of the weft thread when the weft thread selected from a plurality of weft threads by a weft thread selection device is wefted and beaten, and the weft insertion side end of the cloth and the weft insertion side end of the cloth are between the gripper. In a weft processing device that guides to the cutter in the open state and cuts after weaving while holding the weft insertion side part with the gripper, the cutter and the gripper are arranged almost on the extension line of the cloth fell and A weft yarn processing apparatus, wherein a suction nozzle for sucking and holding a plurality of weft yarn ends before weft insertion is arranged between the grippers.