JP3283216B2 - Automatic assembly device for coil springs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic coil spring assembling apparatus for automatically mounting a coil spring on an object to be mounted. More specifically, for example, a coil spring for supporting a motor of a refrigerator compressor is provided in a compressor shell. The present invention relates to an automatic assembling device for a coil spring that is automatically press-fitted into a projection.

[0002]

2. Description of the Related Art In general, a compressor mounted on a refrigerator or the like has a structure in which a compressor motor is housed in a casing called a compressor shell. Four projections are formed, and a coil spring for damping vibration is press-fitted therein, and the motor is held thereon in a floating state.

By the way, in the process of manufacturing such a compressor, the operation of mounting the coil spring in the shell is performed by an operator who actually holds the coil spring in his hand and pushes the coil spring into the projection in the shell and further pushes the finger backward. You are pushing. In addition, since there is a possibility that a coil spring having a different spring constant may be mixed, the operator compresses the spring at the time of mounting, and selects a defective spring based on the degree of rebound.

[0004]

However, since this operation must be performed continuously within the narrow space of the compressor shell and continuously with the compressor shell being conveyed one after another, a great deal of work must be performed on the operator's finger. It is not a favorable working condition. In addition, the load inspection of the coil spring as described above requires a delicate sense of the fingertip, so the work itself requires skill, and in the case of an unskilled worker, there is a risk that a defective product may be mistakenly incorporated. . A compressor equipped with a motor supported by such a defective spring also generates unpleasant vibrations and abnormal sounds.

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide an automatic coil spring assembling apparatus in which a coil spring mounting operation is improved and a defective spring is not erroneously assembled.

[0006]

In order to achieve the above object, an automatic assembling apparatus for a coil spring according to the present invention for automatically assembling a coil spring continuously supplied from a parts feeder to a predetermined portion of an object to be mounted is provided. A spring inspection mechanism for inspecting each characteristic of the coil spring supplied from the parts feeder to determine whether or not the coil spring is a regular coil spring; and a spring for attaching the regular coil spring supplied from the spring inspection mechanism to the predetermined portion. It is characterized by having a mounting mechanism and spring transport means for transporting the coil spring from the spring inspection mechanism to the spring mounting mechanism. The automatic assembling device for a coil spring includes a spring inspection mechanism for determining whether or not the coil spring is a regular coil spring, and a spring mounting mechanism for mounting the spring on an object to be mounted. it can.

In the automatic coil spring assembling apparatus, preferably, the spring inspection mechanism receives a plurality of coil springs in the order supplied from the parts feeder and rotates on a base; There is provided a spring winding inspection means provided at a position for inspecting a spring winding shape of the coil spring, and a spring load inspection means provided at a predetermined position on the base and inspecting a spring load. In this case, the space required for the inspection can be reduced by carrying the coil spring to be inspected while receiving the coil spring on the turntable.

[0008] More preferably, said spring winding inspection means comprises:
It has a transmissive optical sensor that is arranged oppositely, and transmits light to the coil spring to check whether or not the terminal spring portions are in close contact with each other. In the case where the terminal spring portions are coil springs that are in close contact with each other, light from the transmission type optical sensor is blocked by the contact spring portions. Thereby, the spring shape can be inspected.

In the above automatic assembly device for a coil spring, the transmission type optical sensor is offset and opposed to the central axis so that light is transmitted with a shift toward the coil portion from the central axis of the coil spring. Is preferably performed. This is because when the coil spring is viewed from the side, light from the sensor may be blocked by the opposing spring portion around the center axis even if the spring portion is not in close contact. For this reason, the reliability of the inspection itself can be increased by causing the light from the sensor to enter the coil offset from the center axis of the coil spring.

In the above automatic coil spring assembling apparatus, the spring load inspection means preferably has an actuator for compressing the coil spring to a predetermined length, and a load cell for measuring a spring load of the coil spring in a compressed state.
Further, it is preferable that the turntable includes a plurality of pits each accommodating one coil spring, and the spring inspection mechanism further includes a double insertion inspection unit for inspecting a double insertion state of the coil spring into the pit.

Preferably, the spring mounting mechanism comprises:
A table for receiving a coil spring supplied from the spring inspection mechanism via spring conveying means, a table driving means for moving the table and positioning the coil spring held on the table on a predetermined portion of the mounting target; ,
A spring press-fitting means for press-fitting the coil spring into a predetermined portion of the object to be mounted.

Further, the table includes a first proximity sensor for detecting arrival of the coil spring at the table, a second proximity sensor for inspecting a double insertion state of the coil spring at a predetermined position on the table, It is preferable to have a spring support unit for preventing the spring of the coil spring from jumping on the table at the time. Further, the spring mounting mechanism further includes a frame that slidably supports the table, a table driving unit includes an elevating cylinder that elevates the frame, and a slide cylinder that horizontally slides the table on the frame. And an elevating means for elevating the elevating cylinder with respect to the object to be mounted.

The spring press-fitting means includes a guide pipe for guiding a coil spring fixed to the frame and released from the spring support unit to a predetermined portion of the object to be mounted.
It is preferable that a press-fit cylinder fixed to the frame and positioned on the guide pipe to press the coil spring into a predetermined portion is provided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An automatic assembling apparatus for a coil spring according to an embodiment of the present invention will be described with reference to the drawings.
The present embodiment will be described as an automatic coil spring assembling apparatus in which four frustoconical compression coil springs are automatically mounted on one refrigerator compressor shell. FIG. 1 shows the appearance of a compression coil spring inspected and mounted by the present apparatus. The types of compression coil springs to be inspected in the present embodiment include a compression coil spring 1 whose terminal spring portions are in close contact with each other and a compression coil spring 2 whose terminal spring portions are spaced apart from each other. They are selected appropriately according to the specifications. Hereinafter, an example in which the compression coil spring 2 is incorporated into a compressor will be described.

FIG. 2 shows a compressor 3 incorporating such a compression coil spring 2. The compressor motor 4 is housed in a shell (casing) 5, and the compressor 6 is engaged with the shell 5 by a cap 6. The shell 5 has a compressor mounting bracket 7 fixed to its outer wall surface, and a spring seat 8 for supporting the compressor motor 4 via a compression coil spring 2 is fixed to one or the inner wall surface. On the spring seat 8, 4 is fitted to the small-diameter end of the compression coil spring 2.
The protrusions 9 are provided in the cross direction or at intervals of 90 degrees, and the automatic assembling apparatus described below works to press-fit four compression coil springs 2 into these protrusions almost simultaneously.

FIG. 3 shows an automatic assembling apparatus 10 according to the present invention.
And a parts feeder 11 for supplying parts (that is, compression coil springs) to the apparatus. The automatic assembling apparatus 10 includes four spring inspection mechanisms 12 (only one is shown in the figure) for inspecting the outer shape and the spring load of the compression coil springs 1 and 2 supplied from the parts feeder 11. Is also located on the downstream side of the process, and comprises a part after inspection, in this embodiment, a spring mounting mechanism 13 for mounting the compression coil spring 2 to the shell 5.
Are connected by a total of four Teflon (trademark) tubes 14 (only one is shown in the figure) for conveying the compression coil spring 2 by air pressure.

On the other hand, the function of the parts feeder 11 is to dissolve the entangled springs among the many compression coil springs 1 and 2 which are supplied in a mixed state, and to align the directions of the compression coil springs 1 and 2 one by one. It is sent to the inspection mechanism 12. Next, the configuration and operation of the parts feeder 11 will be briefly described with reference to FIG.

The parts feeder 11 is roughly divided into a hopper 15 into which a spring is supplied by an operator, and a hopper 15
And a bowl feeder 16 that sends out the compressed coil springs 1 and 2 supplied from the controller to the spring inspection mechanism 12 in an aligned state. The hopper 15 is a bowl feeder 16
When the number of springs in the inside decreases, the tip of the bowl feeder 1 is detected by a sensor (for example, a weight sensor, a camera, etc.) for detecting this state and a control mechanism (not shown).
The bowl feeder 16 is configured so as to be tilted toward the sixth side, so that the bowl feeder 16 does not lose its spring.

On the other hand, the bowl feeder 16 comprises a cylindrical main body 18 provided with a helical spring supply path 17 on the outer periphery thereof, and the center thereof has a storage section 19 for the compression coil springs 1 and 2 supplied from the hopper 15. Has become. Storage unit 19
Is rotated at a low speed in the direction of arrow A by a motor (not shown) built in the main body 18, and continuously supplies the compression coil springs 1 and 2 to the chute 20.

When the compression coil spring to be assembled is changed, the chute 20 is opened by the air cylinder 21 so that the compression coil spring for the previous model remaining in the bowl feeder 16 is transferred to a non-defective product storage box. (A changeover chute) 22 for discharging the oil. In a normal state in which the damper 22 is closed, the compression coil spring 1 supplied to the chute 20,
2 falls to the pressure feeding tube 23 by its own weight.
The pressure feeding tube 23 is provided with an air injector 24 called a wonder gun at an end thereof, whereby air flows at a high speed in the tube 23, and the compression coil springs 1 and 2 are attached to the main body 18 with the pressure. Into the spring balance machine 24.

The spring balance machine 24 has a motor 2 inside.
5, the compression coil springs 1, 2, which fall from above the disk 26,
Strikes the projection of the rotating disk 26 and rebounds vigorously on the inner wall surface. The spring dispersing machine 24 uses the impact applied to the springs at this time to unravel the entangled springs. The compression coil springs 1 and 2 thus separated individually are connected to the outermost Spring supply path 17
Supplied to

The spring feed path 17 has a bowl feeder 16
A plurality of sets of proximity sensors 28 that detect a spring that has not been released by the spring dispersing machine 24 and a spring that advances in the small diameter portion at a portion branched from the main body portion 18 of the main body 18. An air nozzle 29 for removing the spring from the spring supply path 17 is provided. FIG. 5 shows each form of the proximity sensor 28, the air nozzle 29, and the traveling spring. In FIG. 5, arrow B indicates the direction of travel of the spring, 1a is a spring traveling in the normal direction, 1b is a spring traveling in the opposite direction, and 1c is traveling in a state of being entangled with each other. Showing a spring. As is clear from this figure, the spring 1a which advances in the normal direction has its large-diameter portion first detected by the proximity sensor 28, and gradually increases the distance from the sensor 28. On the contrary, the small diameter portion of the spring 1b is first detected by the proximity sensor 28, and the distance from the sensor 28 gradually decreases. Further, the sensor output fluctuates irregularly when the distance between the spring 1c and the sensor 28 irregularly varies. Therefore, by observing the output change of the proximity sensor 28, it is possible to detect the direction and shape of the spring that has passed at present.

When the reverse spring 1b or the entangled spring 1c is detected in this manner, high-pressure air is injected from the downstream air nozzle 29 toward the springs 1b and 1c at an appropriate timing. As a result, the defective spring is removed from the spring supply path 17 and returned to the chute 20 again (see FIG. 4). As described above, the entangled state is released, and the compression coil springs 1 and 2 having the large-diameter coil portion at the top are formed by the rods of the air cylinder 30 arranged at equal intervals downstream from the proximity sensor 28. The automatic assembling device 1 is partitioned at regular intervals, and finally from the input nozzle 31 finally attached to the end of the spring supply path 17.
It is dropped to the zero spring inspection mechanism 12.

The proximity sensor 32 provided on the side wall of the spring supply path 17 corresponding to each air cylinder 30 detects a state in which the spring is not smoothly shifted to the downstream side. If the spring is advancing,
The rod retreating operation of the corresponding air cylinder 30 is temporarily stopped to make the gap regular. Next, the next spring inspection mechanism 12 will be described with reference to FIG.

The spring inspection mechanism 12 includes a base 33 (solid line in FIG. 3) indicated by a two-dot chain line in the figure, and a turntable 35 intermittently rotated in the direction of arrow C by a step motor 34 mounted on the base 33. With base 3
Each spring inspection unit (which will be described in detail later) is provided on the top 3 so as to correspond to the rotation stationary position of the turntable 35.

The turntable 35 has a total of six pits 36 (36a to 36a) for accommodating the compression coil springs 1 and 2 dropped from the input nozzle 31 of the parts feeder 11.
36f) are formed penetrating at equal intervals in the circumferential direction, and the pits 36 are shifted every 60 degrees with the rotation of the turntable 35. For this reason, the empty pit 36 is always shifted immediately below the injection nozzle with the rotation of the turntable 35, and the dropped compression coil springs 1 and 2 are moved to the pit 36a located immediately below the nozzle at that time. Will be stored.

At a position corresponding to the pit 36a, first, an arrival sensor 37 (a weight sensor, a contact sensor, or the like) embedded in the base 33 detects whether or not the compression coil springs 1 and 2 are housed in the pit 36a. Then, the transmission type optical sensor 38 detects whether or not the two compression coil springs 1 and 2 are erroneously superimposed on the pit 36a. The light sensor 38 is provided on the base 33 and emits a slit-like light toward the pit 36a. A light-receiving unit 38 is disposed to face the light-receiving unit 38 and receives the light passing through the pit 36a.
b. Thus, the compression coil spring 1,
In the case of double injection of 2, the advance of the light from the light projecting part 38a is blocked by the spring tip projecting from the pit 36a,
Thereby, double injection can be detected. The information from the arrival sensor 37 and the optical sensor 38 is input one by one to the control unit that controls the operation of the inspection mechanism 12, and is reflected in the operation of the mechanism at a predetermined rotation position.

When the presence or absence of the double injection is determined as described above, the turntable 35 is rotated 60 degrees in the direction C, and the compression coil springs 1, 2 are moved to the positions indicated by the pits 36b.
Is moved. In this case, whether the spring in the pit is the compression coil spring 1 or the compression coil spring 2 described above with reference to FIG.

FIGS. 7 and 8 show the transmission type optical sensor 39.
This explains the principle of determination of the compression coil springs 1 and 2 based on the above. According to the embodiment, as shown in FIG. 7, the light projecting portion 39a of the transmission type optical sensor 39 emits light to the seating portions of the compression coil springs 1 and 2 housed in the pit 36b,
One of the light receiving portions 39b receives the light transmitted from the spring. As a result, in the compression coil spring 1 in which the terminal portion is in close contact, light to the light receiving portion 39b is blocked by the coil end portion in close contact, and conversely, in the compression coil spring 2 in which the terminal portion is separated, the light passes between the coils. Light receiving part 3
Light flows through 9b. That is, here, the type of the compression coil spring currently housed in the pit 36b can be detected by looking at the output from the light receiving unit 39b.

The transmission type optical sensor 39 has two sets of transmission type optical sensors 39 such that two lines of light are projected with a slight shift from the center axis of the compression coil springs 1 and 2 to the left and right. Are arranged to face each other with a right and left offset. This is because, as shown in FIG. 8 viewed from the light transmission direction, if light is projected along the center axis y of the spring, the light from the sensor 39 is overlapped with the opposing spring portion depending on the size of the spring itself. This is because the light is blocked, and the light is also blocked by the compression coil spring 2, making it difficult to determine the light. For this reason, in the present embodiment, the light from the sensor 39 flows to the right and left offset from the center axis y of the compression coil springs 1 and 2.

Returning to FIG. 6, if the type of the compression coil springs 1 and 2 is determined as described above, the turntable 35 is further rotated by 60 degrees in the direction C, and the pit 36c
The compression coil springs 1 and 2 are moved to the positions indicated by, where the spring loads are measured. The spring load measuring mechanism is pit 3
6c, a load measuring actuator 40 (air cylinder) for compressing the compression coil springs 1 and 2 to a predetermined length, and a load cell for seating the compression coil springs 1 and 2 and measuring the spring load by displacement during compression of the springs. 41. Therefore, the actuator 40
A push fitting 42 which can enter the pit 36c is fixed to the tip of the pit 36c, and a strain gauge 43 for converting the displacement of the spring seat portion into an electric signal is attached to the piece or the load cell 41. The spring load obtained in this manner is controlled by a control unit (not shown) that controls the operation of the inspection mechanism 12.
And is reflected in the operation of the device at the next rotational position.

When the spring loads of the compression coil springs 1 and 2 are measured as described above, the turntable 35 is further rotated by 60 degrees in the direction C, and the defective spring load is selected at the position indicated by the pit 36d. Done. That is, here, the compression coil springs 1 and 2 determined to be out of specification in the previous load measurement, for example,
The air is discharged above the pit 36d by the air duster 44 below 6d, and finally collected into a defective product storage box via a Teflon tube (not shown). Incidentally, the above-mentioned double-injection spring is also discharged from the turntable 35 here, since the spring load is naturally out of the standard.

On the other hand, the compression coil spring 2 whose spring load satisfies the standard has a pit 36e at a position indicated by the pit 36e by a similar air duster 44 according to a command from the control unit.
It is discharged upward, and is pressure-fed to a spring mounting mechanism 13 described later via a Teflon tube 14 (FIG. 3). On the other hand, the compression coil spring 1 that satisfies the spring load but has a different shape specification is discharged above the pit 36f by the air duster 44 at the position indicated by the adjacent pit 36f, and is supplied via the Teflon tube 45 to another specification product (not shown). It is pumped to the storage box.

As described above, in the spring inspection mechanism 12, the characteristics of the double-in state, the type of the spring (contact type or the separated type), and the characteristics of the spring load are continuously changed with the rotation of the turntable 35. Each pit 36d, 36e, 3
6f from the position shown in FIG.
And it will be supplied to the separate specification storage box, respectively. At this time, the inspection results at the positions indicated by the pits 36a, 36b, and 36c are temporarily stored by the control unit.
It goes without saying that the corresponding air duster 44 is selectively operated by the control unit according to the inspection result of the compression coil springs 1 and 2.

Next, the next spring mounting mechanism 13 will be described with reference to FIGS. The spring mounting mechanism 13 is
A table 46 is provided for receiving a total of four compression coil springs 2 sent from the spring inspection mechanism 12 via the Teflon tubes 14. As shown in FIG. 3, the table 46 is slidably mounted on a support frame 47 in the direction of arrow D, and an air cylinder 48 (slide cylinder) for sliding the table 46 is attached to the frame 47. (The mounting part is not shown).

A total of four cylindrical through holes 49 for accommodating the compression coil spring 2 supplied through the Teflon tube 14 are formed in the table 46, and furthermore, on the sides thereof, the cylindrical through holes 49 for the compression coil spring 2 are formed. A first proximity sensor 50a for detecting arrival, a second proximity sensor 50b for detecting double insertion of the spring into the through-hole 49, and a stopper for preventing the compression coil spring 2 from jumping out of the through-hole 49 when stored. 51 (support member) is provided. This stopper 51
The spring support surface is tapered diagonally so as to complement the outer shape of the compression coil spring 2, and can be advanced and retracted into the through hole 49 by an air cylinder 52 (actuator) provided on the side of the table 46. The four sets of the stopper 51 and the air cylinder 52 are connected to the table 46.
, And slides in the D direction together with the table 46.

On the support frame 47, a total of four press-fitting air cylinders 53 are fixed above the table 46 adjacent to the Teflon tubes 14, respectively. Below the four guide pipes 5 that guide the compression coil spring 2 released from the stopper 51 to the projection 9 in the shell 5 when the spring is press-fitted.
4 is fixed to the lower surface of the frame.

The support frame 47 is configured to be able to move up and down by an elevating air cylinder 56 mounted on a bracket 55. The bracket 55 itself is screwed into a feed screw 57 that stands upright on a base (not shown) of the spring mounting mechanism 13, and a linear guide 59 is driven by a stepping motor 58 that rotates the screw 57.
It can be moved up and down while being guided by. Note that an arm member 61 that protrudes into the shell transport path 60 is further fixed to the bracket 55. On the arm member 61, a transmission type optical sensor 62a (light projection) for detecting the height of the transported shell 5 is provided. ) And 62b (light receiving unit) are arranged to face each other with the shell 5 interposed therebetween.

The spring mounting mechanism 13 configured as described above
Will be described with reference to FIG. If the shell 5 to be assembled is installed below the support frame 47 by a transport means (not shown), first, FIG.
As shown in (a), the stepping motor 58 is driven, and the bracket 55 descends toward the shell 5. Then, the transmission type optical sensor 6 attached to the arm member 61
The height of the shell 5 is detected by 2a and 62b.

The detected information on the shell height is directly input to a control unit (not shown) of the spring mounting mechanism 13, and the control unit transmits which of the plurality of types of shells is input in advance. It is determined whether or not it has come, and the bracket 55 is stopped at a predetermined height position corresponding to each shell. Then, the apparatus stands by in this stopped state until the compression coil spring 2 is housed in all the through holes 49 of the table 46 via the Teflon tube 14 (see FIG. 10B).

When the compression coil spring 2 is completely housed in the through hole 49 of the table 46, the air cylinder 48
Is driven, and the entire table 46 is slid in the direction of arrow D such that the through holes 49 are located below the air cylinders 53 for press-fitting. Then, when the compression coil spring 2 and the air cylinder 48 are aligned, the lifting air cylinder 56 on the bracket 55 is driven, and the support frame 4 is moved toward the bracket 55 as shown in FIG.
7 falls. As a result, the four guide pipes 54 enter the inside of the shell 5, and the operation of the lifting / lowering air cylinder 56 is stopped when the tip of the pipe approaches the projection 9.

When the introduction path to the projection 9 is secured in this way, the air cylinder 52 (FIG. 9) then retracts the stopper 51, and releases the compression coil spring 2 supported up to that point from the table 46. . Thereby, each compression coil spring 2 falls by its own weight, and the small diameter portion rides on each projection 9 in the shell 5. Next, the press-fit air cylinder 53 is operated. As a result, as shown in FIG. 10D, the plunger portion 53a of the air cylinder 53 passes through the through hole 51 of the table 46, enters the guide pipe 54, and finally goes below the pipe 54. The compression coil spring 2 protrudes and is pressed into the projection 9.

When the press-fitting operation of the compression coil spring 2 is completed as described above, the air cylinder 53 retreats its plunger portion 53a, and finally, by a procedure reverse to the above-mentioned steps, FIG. And a series of spring mounting operations is completed. As described above, according to the present embodiment, the spring inspection mechanism 12 that automatically inspects the compression coil springs 1 and 2 supplied from the parts feeder 11 and the compression coil spring 2 that has been inspected are attached to the projections 9 of the shell 5. By providing the spring mounting mechanism 13 for automatically press-fitting, it is possible to completely mechanize the selective mounting operation of the spring, which has conventionally relied on human power and the intuition of the operator, to improve the working conditions and to set the defective spring. As a result, the performance of the compressor can be stabilized.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, the embodiment of the present invention has been described by exemplifying an apparatus for assembling the compression coil spring 2 to the shell 5 of the compressor 3. The present invention is not limited to only the shell, but can be automated using the present apparatus for the assembly process of all industrial products in which a spring is press-fitted.

In the above-described embodiment, four compression coil springs are mounted. However, the number of mounting springs is not limited to this number. Further, in the above-described embodiment, each mechanism (parts feeder, inspection mechanism, mounting mechanism) has been described as being operated and controlled by separate control units. You may make it.

[0046]

As described above, according to the present invention,
The work of attaching the spring, which previously relied on human power, can be completely mechanized, and the working conditions can be significantly improved. In addition, the spring inspection work, which relied on the skill and intuition of the operator, is also mechanized, which not only reduces the burden on the operator, but also eliminates the erroneous assembly of defective springs and ensures stable assembly quality. Can be

[Brief description of the drawings]

FIG. 1 is a side view of a compression coil spring inspected and mounted by the device of the present invention.

FIG. 2 is a sectional view showing an assembled state of a compressor to be mounted according to the present invention.

FIG. 3 is an external perspective view of an automatic assembling apparatus for a coil spring according to the present invention and a parts feeder preceding the same.

FIG. 4 is an external perspective view of the parts feeder of FIG. 3;

FIG. 5 is a conceptual diagram of a spring selection unit of the parts feeder.

FIG. 6 is an external perspective view of a spring inspection mechanism.

FIG. 7 is a conceptual diagram of a spring type discriminating method of a spring inspection mechanism.

FIG. 8 is a diagram illustrating an optical path of a spring type determination unit in FIG. 7;

FIG. 9 is an external perspective view of a spring mounting mechanism.

FIG. 10 is a view showing a spring mounting step.

[Explanation of symbols]

 Reference numerals 1, 2, compression coil spring 3, compressor 4, compressor motor 5, shell (casing) 6, cap 7, bracket 8, spring seat 9, projection 10, automatic assembly device 11, parts feeder 12, spring inspection mechanism 13, spring Mounting mechanism 14 ... Tube 15 ... Hopper 16 ... Bowl feeder 17 ... Spring supply path 18 ... Main body 19 ... Reservoir 20 ... Chute 21 ... Air cylinder 22 ... Damper 23 ... Pressure feeding tube 24 ... Air injector 25 ... Motor 26 ... With projection Disk 27 ... Duct 28 ... Proximity sensor 29 ... Air nozzle 30 ... Air cylinder 31 ... Injection nozzle 32 ... Proximity sensor 33 ... Base 34 ... Step motor 35 ... Turn table 36 ... Pit 37 ... Arrival sensor 38,39 ... Transmissive optical sensor 40 … Actuator for load measurement Data 41: Load cell 42: Press fitting 43: Strain gauge 44: Air duster 45: Teflon tube 46: Table 47: Support frame 48: Air cylinder (slide cylinder) 49: Through hole 50: First proximity sensor 51: Second Proximity sensors 52, 53 ... Air cylinder (actuator) 54 ... Guide pipe 55 ... Bracket 56 ... Elevating air cylinder 57 ... Feed screw 58 ... Stepping motor 59 ... Linear guide 60 ... Shell transport path 61 ... Arm members 62a, 62b ... Transmission optical sensor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-216732 (JP, A) JP-A-2-41832 (JP, A) JP-A-3-287325 (JP, A) JP-A-3-287 202234 (JP, A) Fully open sho 56-52636 (JP, U) Fully open sho 62-39930 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 19/00-21 / 00

Claims (7)

(57) [Claims] 1. An automatic assembling apparatus for a coil spring for automatically assembling a coil spring continuously supplied from a parts feeder to a predetermined portion of an object to be mounted, wherein each characteristic of the coil spring supplied from the parts feeder is inspected. Then, a spring inspection mechanism for determining whether or not a regular coil spring, and a regular coil spring supplied from the spring inspection mechanism,
A spring mounting mechanism that mounts the coil spring on the predetermined portion; and a spring conveying unit that conveys the coil spring from the spring inspection mechanism to the spring mounting mechanism. The spring inspection mechanism performs the coil springs in the order supplied from the parts feeder. A turntable for receiving and rotating on the base, a spring winding inspection means provided at a predetermined position on the base and inspecting a spring winding shape of the coil spring, and a spring load provided at a predetermined position on the base and A spring load inspecting means for inspecting the coil spring. The spring winding inspecting means has a transmission type optical sensor disposed to face the coil spring by transmitting light to the coil spring by the transmission type optical sensor. It is inspected whether or not the terminal spring portions are in close contact with each other, and the transmission type optical sensor is located closer to the coil portion side than the center axis of the coil spring. An automatic assembling apparatus for a coil spring, wherein the automatic assembling apparatus is disposed so as to be offset from the central axis so as to transmit light. 2. An automatic assembling apparatus for a coil spring according to claim 1, wherein said spring load inspection means comprises: an actuator for compressing the coil spring to a predetermined length; and a load cell for measuring a spring load of the coil spring in a compressed state. An automatic assembling device for a coil spring, comprising: 3. The automatic assembling device for a coil spring according to claim 1, wherein the turntable includes a plurality of pits each accommodating one coil spring, and the spring inspection mechanism includes: An automatic assembling apparatus for a coil spring, further comprising a double insertion inspection means for inspecting a double insertion state of the coil spring. 4. The automatic assembling device for a coil spring according to claim 1, wherein the spring mounting mechanism receives the coil spring supplied from the spring inspection mechanism via a spring conveying unit. A table; table driving means for moving the table to position a coil spring held on the table on a predetermined portion of the mounting target; and spring press-fitting means for pressing the coil spring into a predetermined portion of the mounting target. An automatic assembling device for a coil spring. 5. The automatic assembling device for a coil spring according to claim 4, wherein the table includes a first proximity sensor for detecting arrival of the coil spring at the table, and a double of a coil spring at a predetermined position on the table. An automatic assembling apparatus for a coil spring, comprising: a second proximity sensor for inspecting a closing state; and a spring supporting unit for preventing a spring of the coil spring from jumping on a table at the time of closing. 6. The automatic assembling device for a coil spring according to claim 4, wherein the spring mounting mechanism further includes a frame that slidably supports the table, and the table driving unit moves the frame up and down. An automatic assembling apparatus for a coil spring, comprising: an elevating cylinder that moves, a slide cylinder that slides a table on the frame in a horizontal direction, and elevating means that elevates the elevating cylinder with respect to an object to be mounted. 7. The automatic assembling device for a coil spring according to claim 4, wherein the spring press-fitting means includes a coil spring fixed to the frame and released from the spring support unit. An automatic assembling apparatus for a coil spring, comprising: a guide pipe guided to a predetermined portion of the coil spring; and a press-fit cylinder fixed to the frame and positioned on the guide pipe to press the coil spring into the predetermined portion.