JP2001087716A - Device for removing defective product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for removing defective products, which is capable of stably removing defective tubes without the occurrence of errors in defect removal. SOLUTION: This device 200 for removing the defective products changes the transporting posture of tubes 2 from a longitudinal direction in a transverse direction, is disposed with a speed increase transporting belt 22 between rotary disks 228 with slits for defect removal, is provided with cam plates 237 for extruding the tubes from the inside of the slits to the outside between these rotary disks, is disposed with a servo motor 235 for intermittently rotating the rotary disks, activates the servo motor to hold the defective tubes 2a within the slits of the rotary disks upon detection of the passage of the defective tubes 2a and gradually extrudes the defective tubes 2a from the inside of the slits and discharges the defective tubes 2a to a defective chute 242 as the rotary disks rotate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing defective products in the course of manufacturing a product of a fixed length, such as a tube used for a core of a heat exchanger such as a radiator for a vehicle or a heater. It is.

[0002]

2. Description of the Related Art In general, defective tubes of this type include those containing a welded seam of a band-shaped material as a tube material, those having a large dimensional error in the cross-sectional shape of the tube, and those having poor plating. As a tube manufacturing machine having a device for removing such defective products, a tube manufacturing machine as shown in FIG. 6 is conventionally known from Japanese Patent Application Laid-Open No. 61-18676. This tube manufacturing machine is configured as follows.

[0003] The uncoiler 10 holds a thin band-shaped material (hoop material) 1 wound in a coil shape and is driven by a motor 11 to send the material 1 to each processing apparatus. The accumulator 100 temporarily holds the material 1 supplied from the uncoiler 10, and supplies a necessary amount of the material 1 to the next processing apparatus. The joint detector 20 detects a weld joint of the material 1. This joint is made of the material 1 to be mounted on the uncoiler 10.
Is connected to the beginning of the next coil, and the tube including this joint is later taken out by the defective product removing device 200. The forming roller 30 is composed of a plurality of sets of rolls, and is driven by a motor 31 to form the flat material 1 into a flat pipe shape through a groove shape.

[0004] The material 1 thus formed into a pipe shape is immersed in a solder plating tank 40 for plating, and then cooled by applying water in a cooling device 50. The material 1 thus formed into a pipe shape is sent to the next cutting device 70 by the feed roller 60, during which the speed detector 8
The moving speed is measured by 0, and the defect detector 90 checks whether or not the shape is normal. This defect detector 90
Is a non-contact type for inspecting the short diameter of the flat pipe-shaped material 1 using eddy current loss. The cutting device 70 cuts the material 1 by a cutter into a tube 2 having a predetermined length, and a motor 71 that drives the cutting device 70.
Is driven by an output pulse of a pulse encoder 81 linked to a speed detector 80.

[0005] The defective product removing device 200 is a device for removing a defective one of the cut tubes 2. Here, the defective tube 2 refers to a welded joint detected by the joint detector 20. And a defective shape detected by the defect detector 90, and a defective length generated when the cutting device 70 automatically sets the cutting length. The normal tubes 2 are bundled by the stacking device 300, for example, every 150 tubes, and sent to the next processing step. Each of the above devices includes a sequence board 400 and a computer 5
00 is driven and controlled.

FIG. 7 shows a defective product removing apparatus 200 used in the conventional tube manufacturing machine. 7, the speed increasing roller 201 is rotationally driven by a driving mechanism (not shown) to increase the speed of the tube 2 in the direction of arrow A. The tube 2 conveyed through the guide member 202 has already been cut to a predetermined length by the cutting device 70 installed in front thereof, but is increased by engaging with the outer peripheral groove 203 of the speed increasing roller 201. Speeded up and separated from what follows. The peripheral speed of the speed increasing roller 201 is about 1.5 times the moving speed of the tube 2 passing through the guide member 202.

[0007] Three disks 206 are fixed to a shaft 205 rotatably supported by a support frame 204, and a gear 207 is provided at the tip of the shaft 205.
The upper part of the support frame 204 is covered with a cover 208,
The cover 208 is formed with three slits 209 so that the peripheral edges of the three disks 206 protrude. Further, the upper surface of the cover 208 has a defective product box 210 attached to the rear.
The defective tube can be guided to the defective product box 210. The outer periphery of each disk 206 is
Each has a claw 211, and these claw 211 all come to the same height position. This shaft 205
Is driven to rotate via a gear 214 and a gear 207 of a motor shaft of a motor 213 fixed to the support plate 212, and the defective tube is hooked by the claw 211 to be discharged to the defective product box 210. Three transfer rollers 21
Numeral 5 is disposed near each disk 206 and transports the tube 2 engaged with the claw 211 at the same speed as the speed increasing roller 201. The photoelectric tube 216 detects a break L between the tubes 2.
Rotation becomes possible. Although one claw 211 is formed for each disk 206, two or more claws may be formed by adjusting the rotation angle of the motor 213. The defective products extracted by the defective product removing device 200 are detected by the joint detector 20, the speed detector 80, and the defective detector 90 in FIG. 6, and the defective tubes detected by these detectors are removed. The computer 500 determines whether or not the user has arrived at the defective product removing device 200.

[0008]

However, in the above-described conventional defective product removing apparatus shown in FIG. 7, a tube having a cutting length of 300 mm or more can remove a defective tube stably. When the cutting length is reached, the speed-up roller cannot contact the tube at a sufficient speed because there are few places where the speed-up roller contacts each tube, and the speed-up feed becomes unstable, and the gap between the tubes increases. , The detection of the detector (photoelectric tube) is not stable, and there is a problem that the failure of removing the defect occurs, and the whole equipment is stopped or the defective product is sent to the post-process integrated device. This is not preferred.

Further, in the conventional defective product removing apparatus,
Since the rotation angle of the disk for taking out the defective tube rotates 360 °, the tubes taken out on the defective chute have a strong momentum, and the tubes collide with each other and are deformed. Could not be used. An object of the present invention has been made in view of the above problems, and can stably transport a tube.
Even if the speed is doubled, stable tube defect removal can be performed.
Another object of the present invention is to provide a defective product removing apparatus that can re-cut and reuse a removed defective tube.

[0010]

According to the present invention, as a means for solving the above-mentioned problems, there is provided a defective product removing apparatus described in each claim. An apparatus for removing defective products according to claim 1, wherein a belt is used for accelerated conveyance of the products, and the defective products are held in slits of a rotary disk having slits and discharged toward a defective chute. As compared with the conventional roller using a speed-up roller, the surface where the product comes into contact with the transport surface is increased, so that the speed-up feed of the product is stable and the gap between the products is constant. However, the detection of the detector is stabilized, and the occurrence of a defect removal error of the defective product can be eliminated, and the occurrence of a defect of sending the defective product to an integrated device in a subsequent process can be prevented. Further, by using the slit and the cam plate, defective products can be stably held and discharged. The defective product removing device according to the second aspect is provided with a plurality of rotary disks with slits and a speed increasing belt disposed between the rotating disks, and is basically the same as the defective product removing device according to the first aspect. Has the function and effect, but the function and effect are further improved.

According to a third aspect of the present invention, there is provided a defective product removing apparatus in which a rotary driving device for rotating a rotary disk with slits is intermittently driven by an angle between adjacent slits. The discharge speed of the defective products discharged above is reduced, the scratches and deformation due to collision of the defective products can be prevented, and the defective products can be recut and used. The defective product removing device according to the fourth aspect specifies the shape of the cam plate, and has the same effect as the defective product removing device according to the third aspect.

A defective product removing apparatus according to a fifth aspect of the present invention specifies a product in a tube, and has the same function and effect as the above-mentioned defective product removing apparatus. In the defective product removing device according to the sixth aspect, the tube has a flat shape, and a flat surface is placed on the conveying belt so that the speed-conveying can be stably performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A defective product removing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. The defective product removing apparatus of the present invention is also used in a defective product removing apparatus provided in a series of steps of the conventional tube manufacturing machine shown in FIG. 1 to 3 are overall views of a defective product removing apparatus 200 according to an embodiment of the present invention.

In FIG. 1, reference numeral 2 denotes a tube fed from the left which is accelerated by a speed increasing roller (not shown).
Reference numeral 16 denotes a detector for detecting a break L in the tube 2, which is, for example, a photoelectric tube. As shown in FIGS. 1 and 2, reference numeral 211 denotes a transport belt that transports the flat tube 2 so that the flat tube is placed on the flat tube 2. It is hung on. The drive pulley 212 is connected by a key to a shaft 214 rotatably mounted on a bearing 215. The shaft 214 is connected to a speed increasing drive motor 218 via a coupling 217. Reference numeral 219 denotes a tube guide for guiding the tube 2, which is fixed to the stay 220. Reference numeral 221 denotes a pulley stand which is rotatable and idler pulleys 211b to 211b.
m is fixed. 223 is a drive pulley stand, a bearing 215 on which a shaft 214 is rotatably mounted,
A rotatable idler pulley 211a is fixed. Reference numeral 224 denotes a tension stand to which a bearing 225 to which a shaft 227 is rotatably mounted and a rotatable idler pulley 211n are fixed. Stay 22
0, pulley stand 221, drive pulley stand 223
And the tension stand 224 share a common base 222.
It is fixed to.

A tension adjusting device 226 is provided on the base 222 so that the tension of the conveyor belt 211 can be adjusted. The tension stand 224 is turned by turning an adjustment bolt or the like.
Is slid left and right, whereby the driven pulley 213 connected to the bearing 225 fixed to the tension stand 224 by the shaft 227 is moved in a direction in which the tension of the transport belt 211 is adjusted. 228
Reference numerals a to 228d denote rotary disks with slits. A large number of slits 243 slightly larger than the width and thickness of the tube 2 are provided at equal intervals toward the center of the disk 2 and are fixed to the shaft 236. I have. The number of rotary disks 228 with slits is arbitrarily determined according to the tube length and tube speed.

The shaft 236 is rotatably mounted on bearings 230 and 238, and a gear 232 is fixed to the end. The bearings 230 and 238 are
2 are respectively fixed to the bearing stands 231 and 239 fixed to. The drive gear 233 is fixed to a drive servomotor 235 which is a rotary drive attached to a motor stay 234 fixed to the base 222,
The rotating disks 228 a to 228 d with slits are driven via the gear 232 and the meshing shaft 236.

237a-237c are defective tubes 2a
Is a cam plate for pushing out the defective tube 2a from within the slit of the rotary disk with a slit, and is fixed to the cam stand 240 as shown in FIG. Note that the cam stand 240 is similarly fixed to the base 222. The shape of the cam plate 237 is such that the defective tube 2a is gradually pushed out of the slit and discharged while the rotary disk with slit 228 rotates from the point A to the point B shown in FIG. 241 is a cover, 242 is a defective chute, and is fixed to the cam plate 237. Position of slit 243 and defective tube 2
The position a is positioned by the servomotor 235.

Defective product removing apparatus 20 having the above configuration
No. 0 operates as follows as shown in FIGS. 3 to 5 to remove defective products. The continuous body of flat tubes manufactured in a series of tube manufacturing steps of the tube manufacturing machine shown in FIG.
After the tube 2 is cut into a fixed length at 0 and reaches the removal position of the defective product removal device 200, the defective tube 2a, which is previously detected as defective by the joint detector 20 and the defective detector 90, etc. If so, the computer 500 issues a command to the drive servomotor 235. The defective tube 2a is transported at a high speed by the transport belt 211. When the trailing end of the defective tube 2a is confirmed by a detector (such as a photoelectric tube) 216 for confirming a break in the tube, the drive servomotor 235 is driven via the computer 500. As shown in FIGS.
Enters the slit 243 of the rotary disk with slit 228 and is held by two or more rotary disks according to its length. As the servo motor rotates intermittently, the cam plate 237 Slowly along the slit 24
3 is discharged to the outside, and finally a defective shoot 2 due to its own weight.
42, and the removal of the defective tube 2a is completed.
The drive servomotor 235 is controlled by the computer 500 so as to be driven by one slit per defective tube, that is, by an angle between adjacent slits.

If the tube 2 is not defective, the drive servomotor 235 does not operate, and therefore, the rotating disk 228 with the slit does not move, and the tube 2 passes through the slit 243 of the rotating disk while remaining on the conveyor belt 211. Then, it is transferred to a post-stacking device.

As described above, in the apparatus for removing defective products according to the embodiment of the present invention, a tube is used as an example of a product having a fixed length. Of course, it can be used for various products.

[0021]

As described above, according to the defective product removing apparatus of the present invention, the posture of the tube in the tube manufacturing machine is changed from vertical to horizontal so that the flat surface of the flat tube is positioned up and down, By using a speed-up transport belt that can take a large number of contact surfaces instead of the speed-up roller, the tube can be transported stably, and even if the transport speed is doubled or more,
It has become possible to stably remove defective products. In addition, by removing defective products by using a large number of slits of the rotating disk with slits and the cam plate, the rotation angle of the disk for taking out the defective tube has been rotated by 360 degrees in the past, whereas in the present invention, Since it is only necessary to rotate the slit by the angle of the adjacent slit, it is possible to prevent damage and deformation due to collision between defective tubes without increasing the discharge speed of defective tubes, and to reduce the length defect that occurs during setup in cutting. Since a defective chute can be taken out without deforming the tube, it is possible to recut and reuse the defective tube.

[Brief description of the drawings]

FIG. 1 is a plan view of a defective product removing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the defective product removing device according to the embodiment of the present invention.

FIG. 3 is a side view of the defective product removing apparatus according to the embodiment of the present invention.

FIG. 4 is a rotating disk with a slit of the defective product removing device of the present invention, a normal tube simply passes through the slit,
It is a partial enlarged view explaining that a rotating disk rotates and is held in a slit in the case of a defective tube.

FIG. 5 is a partially enlarged perspective view for briefly describing the relationship among a rotating disk with a slit, a cam plate, a conveyor belt, and a tube of the defective product removing device of the present invention.

FIG. 6 is a view illustrating a manufacturing process of a conventional tube manufacturing machine.

FIG. 7 is a perspective view of a defective product removing device used in a conventional tube manufacturing machine.

[Explanation of symbols]

 2. Tube 2a Defective tube 200 Defective product removal device 211 Conveyor belt 228 Rotating disk with slit 237 Cam plate

Claims (6)

[Claims] 1. A device for removing defective products in the course of manufacturing a product of a fixed length, comprising: a belt for carrying the product of a fixed length at an increased speed; a driving device for driving the belt; A rotary disk with a slit for discharging the product, a rotary drive for rotating the rotary disk, a cam plate for discharging the defective product from within the slit of the rotary disk to a defective chute, A defective product removing device, comprising: a detector for detecting passage of the defective product; and a computer for controlling the discharge of the defective product by operating the rotary drive device when detecting the passage of the defective product. apparatus. 2. The apparatus according to claim 1, wherein a plurality of rotary disks with slits provided with a large number of slits are provided, and the speed increasing belt is disposed between the rotary disks. Defective product removal equipment. 3. The defective product removing device according to claim 1, wherein the rotary drive device is intermittently driven by an angle between adjacent slits of the rotary disk with slits. . 4. The cam plate according to claim 1, wherein the shape of the cam plate is such that the defective product is gradually pushed out of the slit as the rotary disk with the slit rotates. The defective product removing device according to any one of the preceding claims. 5. The apparatus for removing defective products according to claim 1, wherein the product having a predetermined length is a tube. 6. The removal of defective products according to claim 5, wherein the tube has a flat shape, and the tube is conveyed so that the conveying posture of the tube is such that a flat surface is placed on the speed-up conveying belt. apparatus.