JPH0429283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tube cutting device in an automatic winding machine for electrical conduit with spare wires.

(Prior Art) The present inventor has proposed an automatic tube winding and tying machine that automatically winds up electrical conduits sent out from a forming machine one after another and ties them into a tube bundle.

As shown in Figure 1, this automatic winding and binding machine
A traverse device 10 that sequentially changes the supply position of the tube to the winding drum 21, a plurality of winding drums 21 equipped with a chuck portion 22 that fixes one end of the tube,
A switching device 30 that switches the positions of the plurality of winding drums 21 between the winding position and the bundling position, and a pipe cutting device 40 that cuts the pipe between the winding position and the bundling position.
, a tube holding device 50 that prevents the tube wound on the winding drum 21 in the binding position from loosening, and a tube holding device 50 that prevents the tube wound on the winding drum 21 in the binding position, and a tube holding device 50 that prevents the tube from loosening when the tube is wound on the winding drum 21 in conjunction with the winding drum 21 that rotates intermittently in the binding position. On the other hand, one end of the tube is fixed to the winding drum 21, a certain amount of the tube is wound up, and then the arm 31, which is the shunting device 30, is reversed and the tube is tied up. The wound ends of the tubes are cut, and the tubes wound around the winding drum 21 are bound by a binding device 60.

(Problems to be Solved by the Invention) By the way, some electric conduit tubes have a spare wire made of wire used for drawing out electric wires inserted in advance. In this case, the reserve wire is longer than the conduit and the first pull-out part is provided.
It is attached to the conduit by bending it outward from the tube end. This spare wire can be inserted into the conduit at the same time as the conduit is molded by a molding machine.

However, when a conventional automatic winding and tying machine is used, it is not possible to leave a spare wire at a portion drawn out from the end of the conduit when the conduit is cut by a tube cutting device.

The present invention was made in view of the above circumstances, and when cutting a pipe, the winding end of the pipe wound on the winding drum and the pipe end of the pipe where the next winding is to be started. Another object of the present invention is to provide a tube cutting device for an automatic winding machine for electric conduit with a spare wire, which can cut the conduit while leaving a spare wire in the drawn-out portion.

(Means for Solving the Problems) That is, the tube cutting device according to the present invention is a tube cutting device in an automatic tube winding machine equipped with a plurality of winding drums for winding conduit tubes with spare wires into a tube bundle. and a moving structure located between two winding drums to move the tube to a winding start position of the winding drum,
It has a pipe cutting part that is composed of a central cutting part that cuts the pipe together with the spare wire inserted into the pipe, and both end cutting parts that cut only the pipe leaving the spare wire on both sides of this central cutting part. .

(Function of the Invention) Accordingly, the present invention uses the above-mentioned means to first move the tube to the winding start position of the winding drum using the moving structure when cutting the conduit containing the spare wire,
Next, the tube is cut together with the preliminary wire by the center cutting section of the tube cutting section (FIG. 5), and only the tube is cut, leaving the preliminary wire, by the both end cutting sections of the tube cutting section (FIG. 7). In this way, the pipe that is cut leaving a spare wire between the cut ends of the conduit falls out from the center cut part, leaving a spare wire in the portion drawn out from the end of the conduit.

(Example) Hereinafter, the present invention will be specifically described according to an example shown in the drawings. FIG. 1 shows an automatic pipe winder to which the pipe cutting device of the present invention is applied, FIGS. 2 and 3 are an overall side view and a partially omitted plan view of the pipe cutting device, and FIG. Figures 5 and 5 show the center cutting part of the tube cutting part, and Figs. 6 and 7 show the both end cutting parts of the tube cutting part.

As shown in FIG. 1, the tube cutting device 40 is located between the two winding drums 21 of an automatic conduit winding machine, and the machine is set at the height of the winding start position of the winding drum 21. It is installed on the table.

As shown in FIGS. 2 and 3, this tube cutting device 40 includes a central cutting section 70 at the center of the front, and both end cutting sections 80 located on both sides of the central cutting section 70 with a distance from the tube end of the preliminary wire to the drawn-out section. The entire tube cutting section is used to horizontally wind up the tube that spans between the winding drums 21 by means of a cylinder 41 fixed to the machine base. It is designed to move to the starting position.

As shown in FIGS. 4 and 5, the central cutting section 70 includes a blade member 71 having a cutting blade 76 for cutting the electrical conduit P, and a blade member 71 that is operated to cut the electrical conduit P. It has a cylinder 74. The blade member 71 is composed of a pair of upper and lower parts, has a heater 75 inside to heat the cutting blade 76, and is freely rotatable so as to intersect the cutting blade 76 by a rotating shaft 77 provided at the base of the cutting blade 76. It is set in. One end of two link members 72 is pivotally attached to the opposite side of the cutting edge 76 of the blade member 71 across the rotating shaft 77, and the other end of the link member 72 is connected to the cylinder 7.
It is pivotally attached to the tip of the rod 73 of No. 4. Therefore, when the blade member 71 pushes out the rod 73 of the cylinder 74, the link member 72 pushes out the blade member 7.
The opposite side of the cutting blade 76 of No. 1 was pushed out, thereby rotating the cutting blades 76 about the rotating shaft 77 so as to cross each other, and conversely, the rod 73 of the cylinder 74 was housed in the cylinder 74 and pulled in. At times, the link member 72 pulls the opposite side of the cutting blade 76 of the blade member 71, thereby rotating the cutting blade 76 about the rotating shaft 77 so as to expand the cutting blade 76.

Further, the both end cutting parts 80 located on both sides of the central cutting part 70 include a blade member 81 having a cutting blade 86 for cutting the electrical conduit P, and a cutting part 81 for cutting the electrical conduit P, as shown in FIGS. 6 and 7. It has a cylinder 84 that is operated to cut the pipe P, and has the same structure as the center cutting section 70, but the both end cutting sections 80 differ from the center cutting section 70 in its operating state. That is, the rate of reciprocating movement of the rod 83 of the cylinder 84 is set to be smaller than that of the central cutting portion 70. Therefore, as shown in FIG. 7, when the rod 83 of the cylinder 84 is pushed out, the cutting edges 86 of the blade member 81 of the both-end cutting portion 80 do not completely intersect. At this time, the portions of the cutting blades 86 that do not intersect with each other are designed not to cut the preliminary line. Note that the cutting edge of the cutting blade 86 is formed in a square shape, and cuts the electric conduit P from the periphery toward the center of the tube, and stores the spare wire 100 in the recessed part of the cutting edge.

These center cut portion 70 and both end cut portions 80 are
Cutting blade 7 of blade members 71, 81 consisting of a pair of upper and lower parts
The recesses between 6 and 86 are both installed to face the pipe spanning between the winding drums 21, and the central cutting portion 70
The cutting of the tube including the spare wire by the cutting section 80 and the cutting of only the tube with the spare wire remaining by the both-end cutting section 80 are simultaneously performed by operating the cylinders 74 and 84 of both cutting sections at the same time.

In addition, in this tube cutting device 40, as shown in FIG. 8, on the outside of the both end cutting portions 80 of the tube cutting portion,
A holder 90 that clamps the pipe P from above and below is on the traverse device 10 side of the automatic winder, and a contact plate 92 that abuts against and pushes out the pipe P is on the binding device 60 side of the automatic winder. 93 so as to move forward and backward. Holder 9
In order to prevent the first end of the pipe to be wound on the winding drum 21 from overlapping the next pipe to be wound and the winding to be distorted, the cylinder 91 is used to hold the pipe P held between the holders 90 and Used when pushing out from the winding start position. Also, the cylinder 93 of the contact plate 92
is used when, after cutting the tube, the unnecessary tube between the central cutting section 70 and the both end cutting sections 80 on the binding device side is squeezed out.

Further, as shown in FIG. 2, a cover member 95 that covers the blade member is provided at the upper front part of the tube cutting section. This cover member 95 is provided to prevent danger when cutting the pipe, and is provided with a shaft at one end, and is rotated upward and downward about the shaft by a rotary cylinder 96. It's getting old.

Next, the operating state of this tube cutting device 40 will be explained.

In FIG. 1, first, one end of the electrical conduit P containing the spare wire sent out from the extruder is passed between the rotating rolls 11 of the traverse device 10, and then passed through the winding drum 2.
It is fixed in the groove part which is the winding start position of step 1, and the machine is operated. Winding of the tube is started by the operation of the machine.

After winding the tube, the rotation of the winding drum 21 is stopped,
The shunting device 30 is activated, the arm 31 is reversed about the rotation shaft 32, and the winding drum 21 is shunted.
As a result, the pipe P is placed astride between the two winding drums 21. A tube holding device 50 operates on the winding drum 21 on which the tube P is wound, and presses down the tube bundle wound on the winding drum 21.

Next, the cylinder 41 of the tube cutting device 40 is actuated to move the entire tube cutting section toward the tube P spanning between the winding drums 21. When the holder 90 holds the pipe P and the pipe P fits into the recess between the cutting blades of the blade members 71 and 81 of the center cutting part 70 and both end cutting parts 80 of the pipe cutting part, the cylinder 41 of the pipe cutting device 40
operation will temporarily stop. The operation of the cylinder 41 is stopped by bringing a rod-shaped limit switch (not shown) provided in front of the tube cutting device 40 into contact with the tube. The reason why the movement of the pipe cutting section is temporarily stopped in this way is because of the winding width of the pipe P. Especially for pipes with a large winding width, it is necessary to adjust the position of the pipe after winding. This is effective when the distance from the starting position is long.

When the tube P is placed in the recess between the cutting blades 76 and 86 of the blade members 71 and 81 and the movement of the tube cutting section is stopped, the cover member 95 covers the blade members 71 and 81 and cuts the center cutting section 70 and both ends. The pipe P is cut by operating the sections 80 at the same time. As shown in FIGS. 5 and 7, the center cutting section 70 cuts the pipe P together with the preliminary wire, and the both end cutting sections 80 cut only the tube P, leaving the preliminary wire 100.

After cutting the tube, the cover member 95 opens upward, and the cylinder 41 of the tube cutting device 40 operates to move the cut tube on the holder 90 side to the winding start position of the winding drum 21. One end of the tube is a winding drum 21
It is fixed by the chuck portion 22 of. When the tube is fixed at the winding start position, the cylinder 41 of the tube cutting device 40 is operated again to retract the tube cutting section. At this time of retreat, the blade members 71, 81 of the tube cutting section are in a closed state. Therefore, the central cut 70
The unnecessary tube between the end cut portion 80 and the end cut portion 80 falls out from the center cut portion 70 .

In this way, the cutting process by the tube cutting device 40 is completed.

Thereafter, the winding drum 21, which is in the winding position with one end of the pipe P fixed by the chuck part 22, starts winding up the next pipe. On the other hand, the winding drum 21 that has wound the pipe P stops rotating with its opening 23 facing the tape guide 61 of the binding device 60.
The binding tape is wound around the tube bundle.

Next, the side plate 24 of the winding drum 21 falls forward (toward the near side in FIG. 1) due to the operation of the cylinder, and the bundled tube bundle is pushed out to the front by a pushing cylinder provided at the rear of the winding drum 21. . The extruded tube bundle is separately conveyed by a belt conveyor or the like.

(Effects of the Invention) The pipe cutting device according to the present invention has a central cutting part that cuts the pipe together with a spare wire inserted into the pipe, and a double-end cutting part that cuts only the pipe leaving the spare wire on both sides of this central cutting part. By having a tube cutting section consisting of a section and a section, it is possible to cut the tube leaving a preliminary line of the drawn section at the winding end of the tube wound on the winding drum and at the tube end of the tube where the next winding is to be started. Therefore, it is possible to automatically sequentially produce products in which electrical conduits with spare wires are made into tube bundles, and production efficiency can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of an automatic pipe winding and binding machine to which the cutting device of the present invention is applied, Fig. 2 is a side view of the cutting device, and Fig. 3 is an example of the cutting device shown in Fig. 2. A plan view with parts omitted, FIGS. 4 and 5 show the center cut part, FIG. 4 is a side view of the main part before cutting, FIG. 5 is a side view of the main part after cutting, and FIGS. 6 and 7. 6 shows a side view of the main part before cutting, FIG. 7 shows a side view of the main part after cutting, and FIG. 8 shows a side view of the holder. In the figure, 10 is a traverse device, 30 is a shunting device, 40 is a tube cutting device, 50 is a tube holding device, 60
70 is a binding device, 70 is a center cut portion, and 80 is a both end cut portion.

Claims (1)

[Claims] 1 A pipe cutting device in an automatic pipe winding machine equipped with a plurality of winding drums for winding electrical conduit with spare wire into a tube bundle, which is located between two winding drums, and is located between two winding drums to A central cutting section that is equipped with a moving structure that moves the tube to a starting position and cuts the tube together with a spare line inserted into the tube, and a both-end cutting section that cuts only the tube while leaving a spare line on both sides of this central cutting section. 1. A tube cutting device for an automatic winding machine for conduit with spare wire, characterized in that it has a tube cutting section comprised of: