JP2002079339A - Manufacturing method of coil spring and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and quality by automatically and consistently performing spring manufacture from coiling to pre-setting through heat treatment and polishing. SOLUTION: Excellent coil springs are screened by a screening device 100 from coil springs W discharged from a coiling machine 10, and fed one by one to a heat treatment furnace 300 by a distributor 200. The coil sprints W subjected to the desired heat treatment by the heat treatment furnace 300 are sorted and transferred to a charging device 500 by a sorting device 400, and charged into a polishing machine 600 by the charging device 500. The coil springs W subjected to the predetermined polishing by the polishing machine 600 are fed to a pre-setting device 700 and pre-set. These operations are automatically performed, and the pre-set coil springs W are contained in a container box 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a coil spring, and more particularly to a coil spring manufacturing system capable of continuously and automatically performing coiling, heat treatment, polishing, and pre-setting. .

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 9-108 discloses a manufacturing system in which coil springs are manufactured automatically and consistently.
There is a coil spring manufacturing apparatus disclosed in Japanese Patent No. 764.
According to this, coil springs obtained by coiling a spring material are separated one by one by a handling device and stored on a pallet of a transport device. The coil spring is subjected to heat treatment by a heat treatment device provided on the path of the transfer device.

[0003] Since the coil springs have the property of being entangled with each other, means for separating and transporting the coil springs one by one is required in order to automatically and continuously manufacture the coil springs. In the background art described above, the coil springs are separated and conveyed by holding the coil springs one by one with a handling device.

[0004]

However, in the above background art, since the coil springs are transported one by one using the handling device, there is a disadvantage that the productivity is low. Further, when the coil spring is transported to the stopper provided on the pallet, the spring may rebound due to the elasticity of the coil spring and may come off the stopper.

The present invention focuses on the above points,
The purpose is to perform good separation and transfer of coil springs,
The goal is to improve productivity and quality. The other purpose is
The purpose is to automate not only coiling and heat treatment but also polishing and pre-setting.

[0006]

In order to achieve the above object, the present invention provides a method for selecting a coil spring obtained by coiling,
While transferring non-defective products one by one, the selected coil springs are distributed, and a plurality of them are supplied in parallel to the heat treatment process. Then, if necessary, the heat-treated coil springs are divided into a predetermined number, and then charged into a polishing machine, and the polished coil springs are subjected to a pre-setting process. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <Overall Configuration> An embodiment of the present invention will be described in detail below. FIG. 1 shows an overall configuration of a coil spring manufacturing system according to an embodiment of the present invention. In the figure, the coiling machine 1
A sorting device 100 is provided on the exit side of the coil spring 0. A distributing device 200 is provided on the coil spring sorting and sending side of the sorting device 100, and a heat treatment furnace 300 is provided on the coil spring distributing and sending side. Distributing device 400 is provided on the coil spring unloading side of heat treatment furnace 300.
A coil spring input device 500 for the polishing machine 600 is provided on the coil spring distribution sending side. A pre-setting device 700 is provided on the coil spring delivery side of the polishing machine 600, and the storage box 20 is placed on the coil spring outlet side.

<Coiling Machine> Of the above-mentioned parts, the coiling machine 10 is for performing a suitable plastic working on a wire and cutting it at a predetermined length to form a coil spring. It is used. The coiling machine 10 is provided with a selection sensor 12 for measuring the length of the cut coil spring to select a good product or a defective product.

<Sorting Apparatus>... The sorting apparatus 100 sorts out and removes defective coil springs manufactured by the coiling machine 10 based on the detection result of the sorting sensor 12 of the coiling machine 10. belongs to.
FIG. 2 shows a configuration of the sorting apparatus 100, in which a coil spring manufactured by the coiling machine 10 includes a conduit 10
It is led to 2. The conduit 102 is provided with a sorting port 104 in the falling direction, and a slide tube 106 is provided so as to cover the sorting port 104. This slide tube 106
Is reciprocally slidable in the direction of arrow F2 in FIG. Actuator 108
Is supplied with a detection signal of the above-described sorting sensor 12.

The operation of the sorting apparatus 100 will be described.
First, when the coil spring W manufactured by the coiling machine 10 is not a defective product, as shown in FIG.
Since the sorting port 104 of No. 02 is closed by the slide tube 106, the coil spring W is sent to the distribution device 200 through the conduit 102 as shown by the arrow F3A.
Note that the coil spring W is transferred in a certain direction due to the relationship between the inner diameter of the conduit 102 and the outer diameter of the coil spring W. On the other hand, if the coil spring W is defective, the sorting sensor 1
2, the detection signal to that effect is transmitted to the actuator 108. Then, as shown in FIG. 3B, the slide tube 106 is moved by the actuator 108.
Moves in the direction of arrow F3B. Therefore, the coil spring W is connected to the sorting port 1 of the conduit 102 as shown by the arrow F3C.
04 drops downward and is eliminated.

FIGS. 4A and 4B show a sorting apparatus 100.
Another example is shown. In the above example, the slide tube 1
The defective product was removed by sliding No. 06, but FIG.
As shown in (B), a rotating tube 116 is provided, and
17 may be provided. When the coil spring W is not a defective product, as shown in FIG. 4A, the sorting port 104 of the conduit 102 is closed by the rotating tube 116, so that the coil spring W Conduit 1
02 to the distribution device 200. On the other hand, when the selection sensor 12 detects that the coil spring W is defective, a detection signal to that effect is sent to the actuator 1.
08. Then, as shown in FIG.
The rotary tube 116 is moved by the actuator 108 by the arrow F3.
Rotate as shown at D. For this reason, the sorting port 104 of the conduit 102 and the opening 117 of the rotating tube 116 coincide with each other, and the coil spring W falls and is removed as shown by the arrow F3C.

FIG. 4C shows still another example of the sorting apparatus 100. In this example, conduit 102 is connected to conduit 13
0 and 132, and a selection valve 13 is provided at the branch point.
4 is provided. The conduit 130 is connected to the distribution device 200. The selection valve 134 is normally in the state shown in FIG.
That is, it is located so as to close the conduit 132. Therefore, the good coil spring W is guided from the conduit 102 to the conduit 130 as shown by the arrow F4A, and is sent to the distribution device 200. However, when the selection sensor 12 determines that the product is defective, the selection valve 134 is brought into the state shown by the dotted line by the actuator 108, that is, the position where the conduit 130 is closed. For this reason, the defective coil spring W is guided from the conduit 102 to the conduit 132 as shown by the arrow F4B, and is eliminated.

<Distributing Apparatus> Next, the distributing apparatus 200 will be described. FIG. 5 shows a state viewed from the side of the distribution device 200, and the main part is shown in FIG. FIG. 7 shows the same state as viewed from the direction of arrow F5. In these figures, the conduit 102 of the above-described sorting apparatus 100 is joined to a flexible conduit 204 by a connecting portion 202, and a stocker 206 is provided at the tip of the flexible conduit 204. This stocker 206 moves on a rail 208 by an arrow F
The slider 210 is provided to slide in seven directions. The slider 210 is an actuator (motor)
The slide drive is performed by 211 (see FIG. 7). The rail 208 is provided in a direction orthogonal to the moving direction of the conveyor belt 302 of the heat treatment furnace 300 described later. That is, the stocker 206 is moved by the slider 210
It is capable of reciprocating in a direction crossing the transport belt 302. Note that the position of the stocker 206 is detected by the amount of movement (distance) from the return origin. For example,
The left end position (the left end in FIG. 7) of the movement range of the stocker 206 on the rail 208 is set as the return origin.

As shown in FIG. 6A, coil springs 204B and 204C are respectively provided in the inner and outer grooves of a bellows pipe 204A having a spiral groove. It is configured to be attached. As the stocker 206 moves, the flexible conduit 204 bends and expands and contracts in a fan-shaped range. The coil springs 204B and 204C apply tension to the bellows pipe 204A in such bending and expansion / contraction,
It is provided for the purpose of removing unnecessary slack of the bellows pipe 204A. Further, the inner coil spring 204B also has an action of smoothly moving the inside of the bellows pipe 204A without catching the coil spring W as a work in the groove of the bellows pipe 204A.

At an appropriate position of the flexible conduit 204,
A vibrator 212 for providing vibration is provided. By vibrating the flexible conduit 204 and the conduit 102 of the above-described sorting device 100 by the vibrator 212, the coil spring W in the conduit can be prevented from being caught and the passage can be smoothly performed.

Next, returning to FIG.
Reference numeral 6 denotes first and second stoppers 207 and 209 which protrude into the stock tube 205 and temporarily stop the coil spring W.
And actuators 217 and 219, respectively.
To drive in the directions of arrows F5A and F5B. The stoppers 207 and 2 of the stocker 206 are also provided.
A spring sensor 203 for detecting the coil spring W is provided at a position sandwiched between the actuators 09 and 09, and the actuators 217 and 219 operate based on a result of the detection. A work holder 2 is provided on the discharge port side of the stocker 206.
14 are provided in the rail 208 direction. The work holder 214 is fixed to the fixed frame 216.
The rail 208 described above is also fixed to the fixed frame 216.

A stopper 222 is provided in the vicinity of the lower opening of the work holder 214 for each work holder, and is simultaneously driven in an arrow F5C direction by an actuator 218 fixed to a fixed frame 216. . On the other hand, the transfer belt 302 of the heat treatment furnace 300 is provided with a plurality of pins 304 erected in a direction orthogonal to the moving direction, and the work holder 214 and the stopper 222 are arranged in a one-to-one correspondence. Has become. A stopper 305 is also provided on the belt side of these pins 304.
Is provided. The means for distributing the coil spring is not limited to the means described above, and for example, a multifunctional robot can be used.

FIG. 6B shows an enlarged cross section of a main part of the stocker 206. The stopper 209 is disengaged by the actuator 219 when the coil sensor W is detected by the spring sensor 203, and is for putting the coil spring W into the work holder 214.
At this time, the next coil spring W is held by the stopper 207 so that the coil spring W is not double-loaded.

The stoppers 207 and 209 can be protruded at appropriate positions of the stock tube 205 to a length that closes the tube diameter by about half. For example, the stoppers 207 and 2
09 is configured to close almost the entire diameter of the stock pipe 205, the supplied coil spring W
There is a risk that it will bounce back at 09 and be sent back. But,
In the present embodiment, as shown in FIGS. 6B and 6C, since the stoppers 207 and 209 are configured to close approximately half of the pipe diameter, such inconvenience is prevented.

Further, inclined surfaces 223 are provided at the leading ends of the stoppers 207 and 209. In particular, in the case of the coil spring W having a small coil diameter, the coil spring comes into contact with the tip portions of the stoppers 207 and 209. Even in this case, the coil spring W is inclined in the oblique direction by the inclined surface 223 as shown by an arrow F6A. As a result, it is possible to prevent the reverse feed. Further, a ring-shaped rebound 205A is provided on the tube wall below the stopper 207. This also allows the coil spring W to rebound as shown by the arrow F6B. The same effect can be obtained by tilting the stoppers 207 and 209. The stoppers 207 and 209 may be rod-shaped or plate-shaped. Work holder 2
The stopper 222 on the 14 side and the stopper 3 on the pin 304 side
The same applies to 05 and other stoppers to be described later.

Next, the operation of the distribution apparatus 200 as described above will be described with reference to FIG. Stocker 206
Is moved to the position of the work holder 214 at one end by the actuator 211 (see FIG. 8A). On the other hand, the coil spring W sent from the sorting device 100
Is held in the stock tube 205. This is the spring sensor 2
03, the stopper 209 is disengaged by the actuator 219 as described above, and the coil spring W is loaded into the work holder 214 (see FIG. 8B). Since the stopper 222 on the work holder 214 is closed, the coil spring W is not sent to the pin 304 of the heat treatment furnace 300. Coil spring W at closing
Is prevented by the stopper 222 as described above.

Further, as shown in the figure, since the stopper 207 is projected and closed by the actuator 217 at the same time, the coil spring W supplied from the sorting device 100 is held by the stopper 207 and the work holder 2
Double dosing of 14 is prevented. As described above, the stocker 206 slides in the direction of the rail 208 by the actuator 211. Therefore, the amount of movement of the coil spring W from the coiling machine 10 to the stocker 206 changes, and the arrival time also changes. Such fluctuations are absorbed by the work holding by the stopper 207.

The stocker 206 includes the actuator 21
The coil springs W are sequentially loaded into the work holder 214 by sequentially moving the work holder 214 to the next work holder 214 and repeating the operations of FIGS. 8A and 8B (FIG. 8C).
reference). This operation is sequentially and repeatedly performed on the work holder 214 (see FIG. 8D).

On the other hand, in the heat treatment furnace 300, the transport belt 302 is slowly moved by the driving means,
The position of 04 is detected by a sensor 303 provided on the side surface. The sensor 303 is mounted at a position where the pin 304 is located immediately below the work holder 214. When the sensor 303 detects the pin 304, the driving of the transport belt 302 is stopped instantaneously. 304 stops at a position immediately below the work holder 214. At this point, the stopper 222 below the work holder is disengaged by the actuator 218, and the work holder 2
The coil spring W held by 14 falls to the pin 304 side. After the fall, the stopper 222 is returned to the original position by the actuator 218.
Acts to prevent the coil spring W from jumping up.

The application of the coil spring W to the pin 304 is independent of the position of the stocker 206, regardless of the position of the stocker 206.
03 is performed based on the detection result. Therefore, for example, when defective products are continuously generated, the coil springs W are supplied from the work holders 214 to the pins 304 in a state where the coil springs W are not held in all the work holders 214. .

After the coil spring W falls on the pin 304, the stocker 206 is moved to the work holder 2 located at the end.
Move to the closer one of 14. Then, the above operation is repeatedly performed. Normally, the distribution work of the coil springs W is performed on the outward path and the return path. That is, the distribution of the coil spring W by the distribution device 200 is performed in synchronization with the movement of the pin 304. Thus, the coil springs W manufactured in the coiling machine 10 and supplied in series are supplied to the heat treatment furnace 300 in parallel.

<Heat Treatment Furnace> Next, the heat treatment furnace 300 will be described. As the heat treatment furnace 300, a general one that can perform necessary heat treatment on the coil spring W can be used. In this embodiment, a plurality of pins 304 are two-dimensionally implanted at regular intervals on a conveyor belt 302 circulating in a furnace, and a coil spring W is set on the distribution belt 200 by the distribution device 200 described above. ing.
While the coil spring W moves in the furnace by the transport belt 302, a predetermined heating process is performed.

In the present embodiment, as shown in the side view in FIG. 5, a charging failure detecting unit 310 is provided on the inlet side of the heat treatment furnace 300. This input failure detection unit 31
FIG. 9 shows 0 when viewed from the direction of arrow F9. As shown in FIG.
Are provided with a plurality of gates 312 corresponding to the plurality of pins 304 of the transport belt 302, respectively. Gate 3
Reference numeral 12 denotes a cutout shape through which the pin 304 can pass if one coil spring W is properly set. The movement of the detection door 311 is detected by the sensor 313, and for example, the entire production line is stopped based on the detection result.

For example, in the case where two coil springs W are mistakenly inserted as in the case of the right pin 304A in FIG. 9, or when the coil spring W is set on the pin 304 in an abnormal posture. , Cannot pass through the gate 312. Therefore, the detection door 311 is displaced in accordance with the movement of the pin 304A, and the sensor 313 detects a defective insertion of the coil spring W. Then, the entire production line is temporarily stopped, and the coil spring W having a defective supply is removed.

On the other hand, the discharge side of the coil spring W of the heat treatment furnace 300 is exposed to the step 32 side of the installation surface 30 as shown in FIG. Further, in the heat treatment furnace 300, FIGS.
As shown in the figure, the position of the pin 304 is detected by a sensor 315 provided on the side surface. This sensor 315
Is a position at which the sensor 315 performs detection output when the pin 304 is at the work discharge position. That is, when the sensor 315 detects the pin 304, the driving of the transport belt 302 is momentarily stopped, so that the pin 304 stops at the work discharge position. That is,
The pin 304 of the conveyor belt 302 is connected to the sensor 30 on the entrance side.
3 stops instantaneously at a position immediately below the work holder 214 and stops instantaneously at a work discharge position based on the detection result of the sensor 315 on the exit side.

On the outlet side of the heat treatment furnace 300 and inside the conveyor belt 302, an air nozzle 317 is provided for each pin from which a workpiece is to be discharged, as shown in FIG. The air nozzle 317 is connected to the conveyor belt 302.
Is stopped, and the coil spring W is smoothly dropped and delivered from the pin 304 to the distribution device 400.

<Distributing Apparatus> Next, the distributing apparatus 400 will be described. FIG. 10 shows a side surface of the distribution device 400. FIG. 11 shows a main part of FIG. 11 viewed from the direction of arrow F10. In these figures, in the falling direction of the coil spring W of the heat treatment furnace 300 described above,
A hopper 401 is provided, and the work outlet side is connected to a conduit 402. The hopper 401 is provided with a vibrator 401A. Vibration is given to the hopper 401 based on the detection result of the sensor 315 described above, and the coil spring W is smoothly dropped and the coil spring W is guided to the conduit 402. It has a configuration. Conduit 402
Are provided with passages 404 corresponding to the number of pins 304 in the parallel direction of the conveyor belt 302. Heat treatment furnace 300
The coil springs W discharged in parallel from the
4 are transferred one by one.

Near the center of each passage 404, a stopper 406 similar to that of the distribution device 200 described above is provided. These stoppers 406 are simultaneously driven in the direction of arrow F10A by the actuator 408. A work detection sensor 410 is provided above the stopper 406 in the passage 404, and the actuator 408 is driven based on the detection result of the sensor 410. Further, stoppers 414 are provided on the outlet side of each passage 404, that is, on the left half of FIG. 11 on the outlet side. These stoppers 414 are simultaneously driven in the direction of arrow F10B by the actuator 416.

Next, on the work outlet side of the conduit 402, a sorting stocker 420 is provided. The sorting stocker 420 is provided with a half of the passages 422 of the passages 404 of the conduits 402, and a stopper 4 similar to the distribution device 200 described above is provided at the work outlet side of each passage 422.
24 are provided. The coil springs W sent from the conduit 402 are temporarily held one by one in each passage 422 by the stoppers 424. These stoppers 424 are simultaneously driven in the direction of arrow F10C by the actuator 426. Further, the sorting stocker 420, the stopper 424, and the actuator 4
The actuator 26 can be moved by the actuator 428 in the direction of the rail 429, that is, in the direction of arrow F11 in FIG. As shown in FIG. 11, the charging device 500 is disposed on the right side in the width direction of the transport belt 302 (the direction perpendicular to the plane of FIG. 10).

Next, the sorting device 4 configured as described above
The operation of 00 will be described with reference to FIG. When the transport belt 302 moves, the coil spring W after the heat treatment falls from the pin 304 soon. At this time, the transport belt 302 is stopped for a moment based on the detection result by the sensor 315 provided on the heat treatment furnace 300 side. Then, as described above, while air blowing is performed from the air nozzle 317,
Vibration by vibrator 401A is applied. The coil spring W sent out of the heat treatment furnace 300 in this manner
Are sent one by one to the passage 404 of the conduit 402 through the hopper 401.

In this case, although the drop time difference of the coil spring W is reduced to some extent by the air blow or the vibration, the coil springs W do not drop at the same time. Also,
The effect of the rebound of the coil spring W is also conceivable. Therefore,
The coil spring W is stopped in the passage by the stopper 406 provided substantially in the middle of each passage 404 and temporarily held (see FIG. 12A). When the coil spring W is detected by the sensor 410, the actuator 40
8, the stopper 406 is disengaged, and the coil spring W held in the middle of the passage 404 falls below the passage 404.

At this time, since the right half of the passage 404 has no stopper on the outlet side, the distribution holder 420
Fall into each passage 422 as it is, and are held in the passage 422 by the stopper 424. On the other hand, passage 404
Among them, the left half is provided with the stopper 414 on the outlet side, and thus is held in the passage 404 (see FIG. 12B). Next, the distribution holder 420
When the stopper 424 is disengaged by the actuator 426, the coil spring W held in each of the passages 422 is sent to the input device 500 side (see FIG. 12C).

Next, the distribution stocker 420 is moved to the left side in FIG. 11 by the actuator 428 (FIG. 12).
(D)). When the stopper 414 is released by the actuator 416, the left half coil spring W is transferred to the distribution stocker 420 (FIG. 12E).
reference). Thereafter, the distribution stocker 420 returns to the right position shown in FIG. 11 by the actuator 428 (see FIG. 12F). In this state, when the stopper 424 is disengaged by the actuator 426, the coil spring W in the sorting stocker 420 is sent to the loading device 500 side (see FIG. 12G).

As described above, according to the present embodiment, the heat treatment furnace 3
The plurality of coil springs W sent in parallel from 00 are first supplied to the conduit 402 from the hopper 401. At this time, the coil spring W is temporarily held by the stopper 406 to absorb irregularities (time lag) of dropping, and in the subsequent work, the coil spring W is transferred in a uniform manner so that the work can be performed smoothly. The coil spring W held in the conduit 402 is transferred to the loading device 500 side by half by the distribution stocker 420.

<Charging Device and Polishing Machine> Next, the charging device 500 and the polishing machine 600 will be described. As shown in a side view in FIG. 10, the charging device 500 has a configuration in which a charging guide 502 is provided on the outlet side of the distribution stocker 420 of the distribution device 400 described above. Input guide 502
Has the same number of passages 504 as the distribution stocker 420 (see FIG. 13), and the coil springs W are supplied one by one into pockets 604 (described later) for the coil springs of the polishing machine 600 through these passages.

A stopper / push bar 508 is provided at a lower portion of the loading guide 502 for each passage. The stopper / push bar 508 is for temporarily holding the coil spring W in the feeding guide 502 and for pushing it into the pocket 604 of the polishing machine 600. The actuators 507 and 509 serve as arrows F10D and F10D.
They are simultaneously driven in the 10E direction. That is, when the workpiece is loaded into the polishing machine 600, the
When the work is pushed into the pocket 604, the actuator 507 and 509 drive the work so as to push down the work from above the passage 504. Input guide 502 and actuator 507,
The whole of 509 is fixed to the movable frame 510. The movable frame 510 is mounted on the rotary table 6 of the polishing machine 600.
02 (described later) is configured to be slidable on a guide rail 512.

The movable frame 510 is provided with an actuator 514 for expanding and contracting the copying arm 513 with respect to the pocket 604 of the polishing machine 600 and an actuator 515 for returning the movable frame 510 to the original position. .
The copying arm 513 is extended by the actuator 514,
It enters the gap of the pocket 604 of the polishing machine 600. Since the pocket 604 is rotated by the rotary table 602, the copying arm 513 is pulled by the pocket 604, and the movable frame 510 moves following the rotary table 602. When the copying arm 513 is contracted by the actuator 514 after moving by a predetermined amount, the movable frame 510 is moved.
Stops moving. Then, the actuator 515 operates, and the movable frame 510 returns to the original position.

FIG. 13 shows the appearance of the loading guide 502. Work entry side (upper side) 504 of passage 504
A is the distribution stocker 420 of the distribution device 400 described above.
422, and are arranged on a straight line. On the other hand, the work outlet side (lower side) 504B of the passage 504 corresponds to the pocket 604 of the polishing 600 and is arranged on an arc. A slit 504D for a stopper / push bar 508 is provided on the side surface of the passage 504, respectively.

The polishing machine 600 is a known one, and is shown in FIG.
The configuration is schematically shown in FIG. In the figure, on the outer peripheral side of the turntable 602, a pocket 6 for inputting a work is provided.
04 are provided. On the opposite side of the pocket 604, a slide plate 605 is provided as shown in FIG. 10, thereby preventing the workpiece from falling out of the pocket 604. A polishing disk 606 is provided so as to sandwich the pocket 604 from above and below. Note that the polishing disk 606 is provided with the sliding plate 6.
05 is not provided. The coil spring W is connected to the input device 5
00 is inserted into the pocket 604 of the turntable 602. When the rotary table 602 rotates in the direction of arrow F14A, both ends of the coil spring W
Comes into contact with The polishing disk 606 is indicated by an arrow F1.
It rotates in the 4B direction, whereby the end of the coil spring W is polished.

Next, the overall operation of the charging device 500 and the polishing machine 600 will be described. The coil spring W discharged from the heat treatment furnace 300 is supplied to the charging guide 502 of the charging device 500 from the distribution device 400 described above. Is done. The inserted coil spring W is temporarily held at a lower portion of the passage 504 by a stopper / push bar 508. on the other hand,
The loading guide 502 is slid along the guide rail 512 by the copying arm 513 extended by the actuator 514. This sliding direction matches the rotating direction of the turntable 602 of the polishing machine 600. That is, the input guide 502 is provided in the pocket 60 of the polishing machine 600.
It moves following the movement of 4.

During this movement, the stopper / push bar 508 is released by the actuator 507. Next, the stopper / push bar 508 is connected to the actuator 509.
After being moved above the slit 504D by the actuator 507, the slit 504D is inserted into the passage 504 by the actuator 507.
Move down along 4D. Thereby, the passage 504
Is pushed in the direction of the pocket 604, and the coil spring W is pushed into the pocket 604. After performing these operations, the actuator 514
As a result, the copying arm 513 comes off the pocket 604 and returns, and the input guide 502 returns to the original position by the action of the actuator 515.

As described above, the coil spring W is put into and pushed into the pocket 604 of the turntable 602 of the polishing machine 600. When the turntable 602 rotates,
The coil spring W comes into contact with the polishing disk 606, and the end is polished. Polished coil spring W
Is sent to the pre-setting device 700.

<Presetting Apparatus> Next, the presetting apparatus 700 will be described. FIG. 15A shows a side surface of the pre-setting device 700.
The main part viewed from the direction of arrow F15A in FIG.
FIG. 16B shows the main part as viewed from the direction of arrow F15B. FIG. 17 shows a work guide portion viewed from the arrow F16 in FIG. 16, and FIG. 18 shows a main portion viewed from the arrow F15D in FIG. In these figures, the rotary table 702
The work guides 710 to 740 are provided at symmetric positions on the upper side. These work guides 710 to 740 have the same configuration as shown in FIG. Describing the work guide 720 as a representative, the work guide 720 includes two pre-setting guides 750 and 752 including four guide pins 750A and 752A. A work discharge hole 75 is provided at the bottom of each pre-setting guide 750, 752.
4,756 are provided.

Below the rotary table 702, a fixed table 704 is provided. This fixed table 704
Is provided with an excision part 706 at the work discharge site. That is, the coil spring W inserted into the pre-setting guides 750 and 752 of the work guides 710 to 740.
The work discharge hole 75 is fixed by the fixed table 704.
4,756 so as not to fall. However, the rotary table 702 rotates and the work guide 71
When 0 to 740 reaches the cutout portion 706 of the fixed table 704, it falls from the work discharge holes 754 and 756.

The positions of the rotary table 702 and the fixed table 704 are set so that any one of the work guides 710 to 740 is located below the pocket 604 of the polishing machine 600 described above. 15 and 16, the work guide 710 is located below the pocket 604. In addition, the cutting section 70 of the fixed table 704
6 is located below the work guide 740 in the example of FIG.

Further, a pre-setting plate 760 is provided above the work guide 730. The pre-setting plate 760 has guide pins 750A, 750 constituting the pre-setting guides 750, 752.
Slots 770A and 772A for escape of 2A are provided respectively. This pre-setting plate 760
Can be moved by an actuator 762 in a direction indicated by an arrow F15C in FIG.

The rotary table 702 is intermittently rotated by 90 degrees in the direction of arrow F16A in FIG. In the example of FIG. 16, the work guide 710 is located at the work receiving position PA. The work guide 730 is located at the work compression position PC. The work guide 740 is located at the work discharge position PD. In addition,
The position PB is a preparation position for compressing the work put into the work guide in a stable state.

Next, the structure of a portion for transferring a work from the polishing machine to the pre-setting device will be described. The work receiving position PA is provided on the sliding plate 605 of the polishing machine 600.
(See FIG. 15 (B)). A two-row holder 780 is provided below the cut portion 605A via a shutter 784 that enters the cut portion 605A. The two-row holder 780 has a passage 782 for holding the coil spring W, respectively. Two rows are provided. The shutter 784 is driven in the direction of arrow F15E by the actuator 786. On the other hand, a sensor 78 is provided at an appropriate position of the polishing machine 600.
5 are provided so that the passage of the pocket 604 is detected once every two times. Then, the actuator 786 is driven based on the detection result. An air nozzle 787 is provided on the pocket 604 at the work receiving position PA.

The operation of the work transfer unit will be described. When the rotary table 602 of the polishing machine 600 rotates, the pocket 604 in which the coil spring W is set moves sequentially,
Eventually, the work receiving position PA is reached. This is the sensor 785
Is detected, the actuator 786 is driven to open the shutter 784, and the air nozzle 787 performs air blowing. Then, two coil springs W fall downward from the pocket 604. Coil spring W
Is completed, the actuator 786 operates,
Shutter 784 closes.

On the other hand, the two-row holder 780 is located at the work drop site as described above, and the dropped coil spring W falls through the passage 782 to the pre-setting guides 750 and 752 of the pre-setting device 700, respectively. I do. By repeating the above operation, the coil spring W becomes 2
Each is transferred from the polishing machine side to the pre-setting device side.

Next, the pre-setting operation of the coil spring W will be described. For example, the work receiving position P is added to the pre-setting guides 750 and 752 of the work guide 710.
Assume that the coil spring W is turned on at A. Work guide 7
10 moves in the direction of arrow F16A in FIG. 16 with the rotation of the turntable 702, and becomes the preparation position PB. Then, when the workpiece further moves to the work compression position PC, the actuator 762 causes the pre-setting plate 760 to move.
Is pushed down. Then, the pre-setting guide 75
The coil spring W held at 0,752 is compressed, and pre-setting is performed. After pre-setting,
The pre-setting plate 760 is connected to the actuator 76.
Returned by 2.

Thereafter, when the rotary table 702 further rotates, the work guide 710 reaches the work discharge position PD. As described above, since the cutout 706 is provided on the fixed table 704 at the work discharge position PD,
The coil spring W falls downward, and the storage box 20 (see FIG. 1)
To be housed.

<Effects of Embodiment> As described above, according to the present embodiment, the following technical effects can be obtained. Spring manufacturing from coiling to heat treatment and polishing to pre-setting can be performed consistently and automatically, thereby improving productivity and quality and reducing costs. Since the coil springs manufactured by the coiling machine are individually handled one by one, inconvenience due to the coil springs being entangled is prevented. Since the means for preventing the coil spring from jumping out when the coil spring is stopped is provided, the transfer of the coil spring between processes can be performed smoothly. Since the coil spring after the heat treatment is automatically put into the polishing machine, the polishing operation is made more efficient. Since the pre-setting is automatically performed on the polished coil spring, the pre-setting operation is made more efficient.

<Other Embodiments> There are many embodiments of the present invention, and various modifications can be made based on the above disclosure. For example, the following is also included. (1) In the above embodiment, the step 32 is provided on the installation surface 30, but the entire apparatus of the present invention may be installed on a flat installation surface. 19 and 20 show such an embodiment. FIG. 19 shows a configuration in which the heat treatment furnace 300 is arranged to be inclined with respect to the installation surface 30.
By doing so, the work outlet side of the heat treatment furnace 300 becomes higher, and a device such as the distribution device 400 can be arranged without the need for the step 32 shown in FIG. By tilting the heat treatment furnace 300, heat moves upward. Therefore, it is preferable to additionally arrange the heater 320 on the inlet side of the heat treatment furnace 300. In FIG. 20, a lift conveyor 800 is provided on the work outlet side of the heat treatment furnace 300. With this lift conveyor 800,
The work sent from the heat treatment furnace 300 is distributed to the sorting device 40.
It is thrown into 0.

(2) In the above embodiment, the stocker 20
6, the coil springs W are distributed, but as shown in FIG. 21, the conduit side may be fixed and the work holder side may be moved. In the example shown in the figure, the stocker 206 is fixed, and the work holders 214 are arranged continuously. And it rotates as shown by arrow F21A. The coil spring W is sequentially loaded into the work holder 214 from the stocker 206. Then, the coil spring W is put into the heat treatment furnace 300 at the straight line portion L interposed between the corners, as indicated by an arrow F21B. In the embodiment described above, the moving distance of the coil spring W (the length of the flexible conduit 204) is different between the work holder 214 at the center and the work holder 214 at the end. However, in the embodiment of FIG. 21, since there is no such inconvenience, the timing control of the coil spring closing can be simplified. (3) In the above-described embodiment, a plurality of works to be processed in parallel are sorted in half by the sorting device 400. However, if a very large polishing machine 600 is used, such a sorting device is omitted. It is also possible. (4) Regarding the pre-setting device 700, in the above embodiment, two coil springs W are processed, but the number may be increased or decreased as necessary. Further, the work is temporarily stopped at four positions, but may be increased or decreased as necessary.

[0061]

As described above, according to the present invention,
The main part of the spring manufacturing process from coiling to heat treatment and polishing to pre-setting can be performed automatically and consistently, thereby improving productivity and quality and reducing costs. This has the effect.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a sorting device of the embodiment.

FIG. 3 is a diagram showing the operation of the sorting device.

FIG. 4 is a diagram showing another configuration and operation of the sorting device.

FIG. 5 is a diagram showing a configuration of a distribution device of the embodiment.

FIG. 6 is a diagram showing a main part of the distribution device.

FIG. 7 is a view showing the front of the dispensing device.

FIG. 8 is a diagram showing the operation of the distribution device.

FIG. 9 is a view showing the insertion failure detection unit viewed from the arrow F9 in FIG. 5;

FIG. 10 is a diagram showing a configuration of a distribution device and a charging device of the embodiment.

11 is a diagram showing a main part as viewed from the direction of arrow F10 in FIG. 10;

FIG. 12 is a view showing the operation of the distribution device.

FIG. 13 is a view showing a main part of the charging device.

FIG. 14 is a view showing a main part of the polishing machine of the embodiment.

FIG. 15 is a view showing a side surface of the pre-setting device of the embodiment and a main part as viewed from an arrow F15A.

FIG. 16 is a diagram showing a main part viewed from the arrow F15B in FIG. 15;

FIG. 17 is a view showing a holder portion of the pre-setting device.

FIG. 18 is a diagram showing a main part as viewed from the arrow F15D in FIG. 15;

FIG. 19 is a diagram showing an overall configuration of another embodiment of the present invention.

FIG. 20 is a diagram showing an overall configuration of another embodiment of the present invention.

FIG. 21 is a diagram showing another embodiment of the distribution device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Coiling machine 12 ... Sorting sensor 20 ... Storage box 30 ... Installation surface 32 ... Step 100 ... Sorting device 102 ... Conduit 104 ... Sorting port 106 ... Slide tube 108 ... Actuator 116 ... Rotating tube 117 ... Opening 130, 132 ... Conduit 134 ... Selection valve 200 ... Distributing device 202 ... Coupling part 203 ... Sensor 204 ... Flexible conduit 204A ... Folding pipe 204B, 204C ... Coil spring 205 ... Stock tube 205A ... Bounce back 206 ... Stocker 207 ... Stopper 208 ... Rail 209 ... Stopper 210 ... Slider 211 ... actuator 212 ... vibrator 214 ... work holder 216 ... fixed frame 217, 218, 219 ... actuator 222 ... stopper 223 ... inclined surface 300 ... heat treatment furnace 302 ... transport belt 303 ... sensor 3 04, 304A Pin 305 Stopper 310 Injection failure detecting unit 311 Detection door 312 Gate 313, 315 Sensor 317 Air nozzle 320 Heater 400 Distributing device 401 Hopper 401A Vibrator 402 Conduit 404 Passage 405 ... Sensor 406 ... Stopper 408 ... Actuator 410 ... Sensor 414 ... Stopper 416 ... Actuator 420 ... Distribution stocker 420 ... Distribution holder 422 ... Each passage 422 ... Path 424 ... Stopper 426,428 ... Actuator 429 ... Rail 500 ... Carrying device 502 ... Feeding guide 504... Passage 504 D. Slit 507... Actuator 508. Bar 509. Actuator 510 .. Movable frame 512... Guide rail 513. Copying arm 514, 515. 600 polishing machine 602 rotating table 604 pocket 605 sliding plate 605A cutting part 606 polishing disk 700 pre-setting device 701 driving device 702 rotating table 704 fixed table 706 cutting part 710-740 work guide 750, 752: Pre-setting guide 750A, 752A: Guide pin 754, 756: Work discharge hole 760: Pre-setting plate 762: Actuator 770A, 772A: Long hole 780: Row holder 782: Passage 784: Shutter 785: Sensor 786: Actuator 787: Air nozzle 800: Lift conveyor PA: Receiving position PB: Preparation position PC: Compression position PD: Discharge position

 ──────────────────────────────────────────────────の Continued on the front page (72) Koji Miyata 1152-25 Ryoke Yamashita, Ageo City, Saitama Prefecture Inside Taga Works Co., Ltd. (72) Katsuichi Okabe 1152-25 Ryoke Yamashita, Ageo City, Saitama Stock Company Inside Taga Works (72) Inventor Minato Okazaki 7-6 Aokicho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term in Asahi Denken Co., Ltd. (Reference) 3C033 BB10 FF02 FF07 FF08 4E070 AA06 AB09 CA05 CA06 DA05 EA05

Claims (15)

[Claims] 1. A coiling step of processing a wire into a coil spring; a selecting step of selecting the processed coil spring and transferring non-defective products in series; distributing the selected coil springs and distributing a plurality of them in parallel. A step of heat-treating the coil springs supplied in parallel; a step of putting the heat-treated coil springs into a polishing machine; a step of polishing the coil springs; 2. The coil spring manufacturing method according to claim 1, further comprising a pre-setting step of performing a pre-setting process on the coil spring polished in the polishing step. 3. The method according to claim 1, further comprising the step of: distributing the coil springs heat-treated in the heat-treating step into a predetermined number, wherein the supplying step comprises supplying the coil springs distributed in the distributing step to a polishing machine. Claim 1
Or the method for manufacturing a coil spring according to 2. 4. A coil spring distribution device for supplying a coil spring obtained in a coiling step to a heat treatment step, wherein a plurality of the coil springs are provided in parallel to temporarily hold the coil spring and heat-treat the held coil spring. Holder means for supplying the coil springs in parallel to the process; transfer means for transferring the coil springs one by one and moving to the input port of each holder means to sequentially feed the coil springs; hold and supply of the coil springs input to the holder means And a stopper means for preventing the coil spring from jumping out at the time of insertion. 5. A coil spring distribution device for supplying a coil spring obtained in a coiling step to a heat treatment step, wherein a plurality of the coil springs are continuously provided, the coil spring is temporarily held, and the held coil spring is removed. Holder means for supplying the heat treatment step in parallel; rotating means for rotating the holder means; transferring means for transferring the coil springs one by one and sequentially charging the coil springs to the holder means; coil springs supplied to the holder means And a stopper means for controlling the holding and supply of the coil spring and preventing the coil spring from jumping out at the time of closing. 6. The coil spring distribution device according to claim 4, wherein a vibrating means for applying vibration to the transfer means is provided. 7. The coil spring distribution device according to claim 4, wherein said stopper means includes a stopper for absorbing a difference in transfer time of each coil spring by said transfer means. 8. A heat treatment apparatus for performing necessary heat treatment on a coil spring on a belt means circulating in a furnace, wherein the heat treatment apparatus is provided at a constant interval on the belt means and supports the coil springs one by one. A large number of pin means; a drive stop means for temporarily stopping the driving of the belt means when the coil spring is applied to and sent from the pin means; a furnace for determining whether one coil spring is applied to one pin means at a normal position. A sensor means for detecting at an entrance side of the heat treatment apparatus. 9. The heat treatment apparatus according to claim 8, wherein a step is provided on an installation surface of the heat treatment apparatus on a coil spring delivery side. 10. The heat treatment apparatus according to claim 8, wherein the heat treatment apparatus as a whole is inclined with respect to an installation surface. 11. The heat treatment apparatus according to claim 8, wherein a lift means for the coil spring is provided on the coil spring delivery side of the heat treatment apparatus. 12. A coil spring distributing device for distributing coil springs that have been heat-treated in a heat treatment step, wherein a plurality of coil springs are provided in parallel, and first holder means for holding the coil springs supplied in parallel from the previous step. First stopper means for controlling the holding and supply of the coil spring loaded into the first holder means and preventing the coil spring from jumping out at the time of loading; a plurality of coil springs held by the holder means; Holder means for distributing and holding the coil springs in a predetermined number; a second stopper for controlling the holding and supply of the coil spring loaded in the second holder means and preventing the coil spring from jumping out at the time of loading. Means for distributing coil springs. 13. A loading device for feeding the coil springs distributed in the distribution process to the polishing process, comprising: holder means for holding the distributed and parallel-supplied coil springs; Stopper means for controlling the holding and supply and preventing the coil spring from jumping out at the time of feeding; supply means for simultaneously supplying a plurality of coil springs held by the holder means to pockets of a polishing apparatus; A moving means for moving in accordance with the movement of the pocket. 14. A pre-setting device for performing a necessary pre-setting process on a coil spring, the receiving position for receiving the coil spring from a previous step, the compression position for compressing the coil spring, and the discharging of the coil spring. Rotary table on which at least a discharge position to be set is set; a plurality of holders provided on the rotary table corresponding to the respective positions to hold a coil spring; pre-setting required for the coil spring at the compression position Pre-setting means for performing processing; discharge means for discharging the coil spring held by the holder means at the discharge position; wherein the holder means sequentially moves from the receiving position through the compression position to the discharge position. A pre-setting device for rotating the rotary table. 15. An apparatus for manufacturing a coil spring, comprising at least one apparatus according to claim 4. Description: