JP3189915B2 - Method of cutting lap sheet in lap feed section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a textile machine in which a wrap sheet wound in a roll is processed by a wrap processing means such as a combing head or a draft section, for example, a wrapping sheet from a wrap roll. The present invention relates to a technique for cutting a continuous wrap sheet being fed, and more particularly to a technique for cutting the wrap sheet in a state where the feed of the wrap sheet is stopped.

[0002]

2. Description of the Related Art As such a lap sheet cutting technique, a joining roller disposed in front of a carrier roller (feed roller) on which an old empty wrap roll is placed is used.
Nipping the wrap sheet sent from the wrap roll, pressing the old wrap roll near empty to the carrier roller, and rotating the carrier roller in this state in reverse (Japanese Patent Laid-Open No. 4-222234). A nearby old wrap roll is dropped downward from between a pair of front and rear feed rollers, and a full wrap bobbin prepared in advance is placed on the feed roller in synchronization with this drop, and the supply roller is dropped by the fall of the old wrap roll. A comb tooth disposed below acts on a wrap sheet continuous from the old wrap roll to cut the wrap sheet of the old wrap roll (US Pat. No. 2,559,074).

[0003]

In the prior art, a pressing device for the old wrap roll is required, and the device may be complicated. Further, in the prior art, a comb tooth located below the feed roller and a method of cutting the old lap sheet during the combing operation by moving the lap sheet, that is, during the feeding of the old lap sheet, so that the old lap sheet is cut. If you stop feeding and try to cut the wrap sheet, it cannot be cut.

[0004]

SUMMARY OF THE INVENTION The present invention provides a lap feeder.
The purpose of this is to obtain a lap sheet cutting method that can reliably cut in a short time with the feeding of the old lap sheet stopped in the front feed roller shaft.
Cut at the end of the comb support arm that is rotatably supported
For the front feed roller and the back filter.
A continuous wrap sheet sent out from the wrap roll on the feed roller to the wrap processing means is stopped by stopping the lap sheet and nipped between the wrap processing means and the front feed roller. from the standby position on the one side in the thickness direction, toward the cutting position is located in the front feed roller direction to the standby position in the thickness direction the other side, cut
The comb is moved in an arc around the axis of the front feed roller .

[0005]

According to the above, when the wrap sheet is stopped, the wrap sheet extending between the nip portion and the front feed roller is moved from the standby position on one side in the thickness direction to
Front fee cutting comb towards In the other side in the thickness direction to a cutting position located away from the nip portion
Move circularly around the axis of the roller . In this manner, the stopped lap sheet is reliably and quickly cut only by the nip operation and the moving operation of the cutting comb.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ribbon wrapping machine 1 will be described below. As shown in FIG. 3, the ribbon wrapping machine 1 has an intermediate frame 4 between the frames 2 and 3 at both ends.
Are arranged at regular intervals in the machine longitudinal direction. Between adjacent frames 2 and 4 (between frames 4 and 4
As shown in FIGS. 1 and 2, four draft rollers are rotatably supported at the front of each of the frames 3 and 4 to form a draft portion 5 (wrap processing means). .
A lap feed section 6 is provided behind each draft section 5 (right side in FIG. 3). A lap supply conveyor 7 is disposed behind the lap feed section 6 in the machine longitudinal direction.
The full wrap roll FL is prepared at the standby position A corresponding to the above.

As shown in FIGS. 1 and 2, the wrap feed section 6 includes a front feed roller 10 and a back feed roller 11.
And The front feed roller shaft 1 is rotatably supported by bearings (not shown) provided on each of the frames 2, 3, and 4.
2 is wedged. This front feed roller 10
A back feed roller swinging shaft 13 is rotatably supported between the frames 2, 3, and 4 at a lower rear portion of the frame.
The back feed roller swinging shaft 13 has a pair of left and right frames 2 and 4 (4, 4
A pair of swing levers 14 for the back feed rollers are wedge-fitted inside of (3) and (4). The back feed roller 11 is wedge-mounted on a back feed roller shaft 15 that is rotatably supported by the tip of the swing lever 14 and extends over the frames 2 to 4.

Among the swing levers 14, the one closest to the frame 3 has an arm 14a integrally projecting rearward, and the tip of a piston rod 16a of a swing cylinder 16 is pin-connected to the arm 14a. The back feed roller 11 approaches and separates from the front feed roller 10 when the piston rod 16a comes and goes. Each of the feed rollers 10 and 11 and each of the rollers in the draft section are configured to rotate in the wrap sending direction by the rotation of the main motor 17. As shown in FIG. 2, between the front feed roller 10 and the draft portion 5, a lap plate 20 is fixed to the frames so as to extend between the left and right frames. A wrap supply conveyor 7;
A tilt table 21 is disposed between the lap feeders 6, and the full wrap roll FL prepared at the standby position A on the lap supply conveyor 7 is pushed onto the tilt table 21 by a wrap roll push bar (not shown). And is supplied to the lap feed unit 6.

Next, the lap cutting device 30 will be described. Corresponding to the front feed roller 10 of each lap feed section 6, comb support arms 31 are respectively rotated relative to the front feed roller shaft 12 at both axial positions of the front feed roller shaft 12 in the front feed roller shaft 12. It is freely supported. The two comb support arms 31 on both sides of the front feed roller 10 are paired, and a cutting comb 32 is laid across each end. One of the paired comb support arms 31 is integrally provided with a connecting arm 31a, and the tip of each connecting arm 31a is connected to the frame 3 or the frame 4
Is connected to a piston rod 33a of a cutting cylinder 33 having one end pivotally connected thereto, and by operation of the cutting cylinder 33, as shown in FIG. 1, from a standby position A1 below the old lap sheet LP2 in the thickness direction. It moves in an arc toward the upper cutting position A2 and from the front to the rear.

Next, the lap joining device 40 having the suction pipe 43 and the press member 53 will be described. A pipe shaft 41 is rotatably supported just below the rear end of the lap plate 20 between the frames 2, 3, and 4. A pipe support arm 42 is integrally connected to the shaft 41 at a position corresponding to the comb support arm 31.
Each of the pipe support arms 42 is paired with two pipes, and a suction pipe 43 is horizontally mounted at a tip end. Each suction pipe 43 is provided with a suction port 44 having substantially the same width as the old lap sheet LP2. One end of each suction pipe 43 is connected to a suction source (not shown) via a bellows hose 45.

One end of the shaft 41 projects to the side of the frame 3 and is integrally connected to one end of a swing arm 46. The other end of the swing arm 46 is connected to a swing cylinder 47. The swing cylinder 47 has two cylinders 48, 49
Are integrally connected back to back, and a piston rod 49 a of a cylinder 49 is supported by the frame 3. Then, the suction pipe 43 moves in an arc by the action of both cylinders 48 and 49, and when both piston rods 48a and 49a of both cylinders 48 and 49 protrude, the suction pipe 43 is located at a predetermined position on the outer circumference of the full wrap roll FL. Is located at the suction position B1 for sucking the leading end S1 of the new wrap sheet, and when both the piston rods 48a, 49a are retracted, it is located at the open position B3 of the wrap sheet.
The piston rod 48a projects, and the piston rod 49a
Is retracted to a standby position B2 between the suction position B1 and the release position B3. The open position B3 is, as shown in FIG.
Nip line N by front feed roller 10 of L
A position farther from the nip line N1 in the direction of the draft section 5 than the wrap sheet length L between the wrap sheet 1 and the front end S1 of the new wrap sheet LP1, and set at a position where the old wrap sheet L2 can be pressed from above. is there.

A shaft 51 for a press member is rotatably supported at the front side of the shaft 41 between the frames 2, 3, and 4. A press member support arm 52 is integrally connected to the shaft 51 at a position corresponding to the pipe support arm 42. The press member support arm 52 has a bent shape so as to avoid interference with the pipe 43 located at the open position B3, and has a new or old lap sheet LP at its tip.
A press member 53 for pressing the ends of the LP1 and LP2 between the wrap plate 20 and the LP1 is fixed. One end of the shaft 51 projects from the plate 3 and is connected to one end of a swing lever 54. The other end of the swing lever 54 is connected to a piston rod 55 a of a press cylinder 55 having one end pivotally connected to the frame 3. The operation of the cylinder 55 causes the circular movement between a press position C2 for pressing the overlapped portions at the front and rear ends of the new and old lap sheets LP1 and LP2, and a standby position C1 away from the lap plate 20. And
The suction pipe 43 and the pressing member 53 also serve as a nip member when cutting the wrap sheet.

Next, the operation will be described. The full wrap rolls FL sent from the previous process are arranged on the supply conveyor 7 at standby positions A corresponding to the respective draft portions 5. The full wrap roll FL determines the circumferential position of the leading end S1 of the new wrap sheet LP1 at a predetermined position in a previous process, and waits for a standby position A.
On the tilt table 2 with an extruding bar (not shown).
Roll over the front and back feed rollers 1
When placed on 0,11, just wrap sheet LP
The first end S1 is located at a position facing the suction pipe 43 at the suction position B1.

Front and back feed rollers 10, 1
When the spinning-length detector (not shown) detects that the old wrap roll EL on 1 is almost empty, the machine stand is stopped. During spinning, as shown in FIG. 4, the suction pipe 43 and the press member 53 at the standby positions B2 and C1, respectively, do not interfere with the old lap sheet LP2 passing over the lap plate 20, as shown in FIG. After the suction pipe 43 first moves to the opening position B3, the pressing member 53 is positioned at the pressing position C2, and the old lap sheet LP2
Is nipped with the lap plate 20. Next, the cutting comb 32 located at the standby position A1 draws an arc from the lower side of the old lap sheet LP2 to the upper side, and the nip portion N of the old lap sheet LP2 by the pressing member 53.
It moves in a direction (rearward) away from 2 and reaches the cutting position A2 as shown in FIG. As a result, the old lap sheet LP2 pulled by the comb 32 is separated into fibers in the old lap sheet LP2 as shown in FIG.

Next, as shown in FIG. 4, the comb 32 is returned to the standby position A1, and the cutting is completed. Then, the back feed roller 11 is swung away from the front feed roller 10 by the action of the swing cylinder 16 as shown in FIG.
Is discharged downward, and then the back feed roller 11 is returned to the original position and the press member 53 is returned to the standby position C1.

Subsequently, a lap joining operation is performed. The full wrap roll FL at the standby position A rolls on the inclined table 21 by the action of the push bar and is placed on the front and back feed rollers 10 and 11 as shown in FIG. Next, as shown in FIG.
1 while drawing an arc, air is sucked from the suction port 44 to suck the front end S1 of the new wrap sheet LP1 located at a predetermined position. While continuing suction, the suction pipe 43 draws an arc again and moves to the open position B3.
The opening position B3 is farther from the nip line N1 in the direction of the draft portion 5 than the length at which the new wrap roll LP1 is peeled off, so that even if the suction pipe 43 continues suction, the opening position B3 is opened.
When the number reaches 3, the suction force naturally does not reach the new lap sheet LP1, and falls on the end of the old lap sheet LP2 as shown in FIG.

Next, as shown in FIG. 5, the press member 53 pivots from the standby position C2 to the press position C1, and presses the overlapped portions of the new and old wrap sheets LP1 and LP2 with the wrap sheet 20 from above. Seam the edges of both wrap sheets. Then, as shown in FIG. 5, the press member 53 and the suction pipe 43 are returned to the standby positions C2 and B3, respectively, and the machine is restarted.

In this embodiment, at the time of cutting, the old lap sheet LP2 is also placed on the suction pipe 43 at the open position B3 of the lap sheet.
Although the nip function is provided, the nip function can be implemented only by the nip of the press member 53. Further, the suction pipe 43 is set at three positions. However, the standby position is the open position of the wrap sheet LP1, and the standby position is set so that the lap sheet LP can pass through the wrap plate 20. It may be arranged at a more distant position.

[0019]

As described above, according to the present invention, when the wrap sheet is stopped, the wrap sheet extending between the nip portion and the front feed roller is moved from the standby position on one side in the thickness direction to the cutting position. As the cutting comb is moved toward, the stopped lap sheet can be reliably moved only by the nip movement and the movement of the cutting comb.
And it can be cut in a short time.

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for cutting and joining a wrap sheet.

FIG. 2 is a plan view of FIG. 1 in a nip state of a press member and a suction pipe.

FIG. 3 is an overall plan view of a ribbon wrapping machine to which the present invention is applied.

FIG. 4 is a diagram showing a cutting action of a wrap sheet.

FIG. 5 is a diagram showing a joining operation of a wrap sheet.

FIG. 6 is a diagram showing a cut state of a wrap sheet.

[Explanation of symbols]

5 Draft part, 10 Front feed roller, 1
1 back feed roller, 32 cutting combs, 5
3 Press member, N2 nip, A1 standby position, A2 cutting position

Claims (1)

(57) [Claims] (1) relative to a front feed roller shaft;
Cutting tip is attached to the end of the rotatably supported comb support arm.
With a front feed roller and back feed
A continuous wrap sheet sent out from the wrap roll on the roller toward the lap processing means is stopped by stopping the lap sheet and nipped between the lap processing means and the front feed roller. from the standby position on the one side in the thickness direction, toward the cutting position is located in the front feed roller direction to the standby position in the thickness direction the other side, cutting
A method for cutting a lap sheet in a lap feed unit , wherein the comb is moved in an arc around an axis of a front feed roller .