JPH06285996A - Method and apparatus for riveting - Google Patents

Abstract

PURPOSE:To connect fixedly works by using a plastic rivet and a plastic washer. CONSTITUTION:Plastic rivets and plastic washers are so sequentially supplied one by one to an axis of a rivet position to a work by a rivet feeder 7 and a washer feeder 5 as to be opposed through a work. A punch or a punching unit 6 is vertically moved up and down through the washer fed to a riveting position by the feeder 5, and a lower hole to be engaged with the rivet is formed at the work in cooperation with a die 9. Then, a guide pin of a rivet driver 8 is vertically moved up and down, and the rivet fed to the riveting position is driven to the washer through a lower hole formed at the work by the feeder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riveting method and apparatus for connecting and fixing works by means of plastic rivets and plastic washers.

[0002]

2. Description of the Related Art Conventionally, a plastic container is assembled by bending a plastic sheet along a predetermined folding line and connecting and fixing the overlapping portion with a metal rivet.

[0003]

By the way, it has been proposed to reuse plastics in response to heightened environmental protection when disposing of plastics. It is necessary to separate the rivet from the plastic sheet, and there is a drawback that the separation is technically difficult and the cost is increased.

The present invention has been made in view of the above problems, and a plastic rivet and a plastic washer made of the same or similar material as a work such as a plastic sheet are provided so that the plastic can be easily recycled. The present invention provides a riveting method and device capable of connecting and fixing works by using.

[0005]

According to the riveting method of the present invention, a plastic rivet and a plastic washer are sequentially transferred one by one so as to face each other while sandwiching the work on the axis line of the rivet position with respect to the work, and then to the rivet position. After forming the pilot rivet fitting pilot hole in the work through the transferred plastic washer, drive the plastic rivet into the plastic washer through the pilot hole formed in the work to connect and fix the workpiece through the plastic rivet and the plastic washer. It is characterized by doing.

The riveting apparatus of the present invention further comprises a rivet transfer device for sequentially transferring the plastic rivets one by one on the axis line of the rivet position with respect to the work, and the plastic rivet transferred by the rivet transfer device and the work. As described above, the washer transfer device sequentially transfers the plastic washers one by one on the axis line of the rivet position with respect to the work, the punching device that raises and lowers the punch through the plastic washer transferred by the washer transfer device, and the rivet transfer device. A rivet driving device for driving a plastic rivet, and a die that cooperates with a punching device to form a plastic rivet fitting pilot hole in the work.The plastic rivet fitting pilot hole is formed at the rivet position of the work. As well as, a plastic rivets through the lower hole is characterized in implanting a plastic washer.

[0007]

The plastic rivet and the plastic washer are sequentially transferred one by one so as to face the work while sandwiching the work on the axis line of the rivet position with respect to the work.
Then, after forming the plastic rivet fitting pilot hole in the work through the plastic washer transferred on the axis of the rivet position, the plastic rivet and the plastic rivet are driven by driving the plastic rivet into the plastic washer through the pilot hole formed in the work. Work pieces are connected and fixed via washers.

As a result, a plastic rivet fitting lower hole can be formed at the rivet position of the work, and at the same time, the work can be connected and fixed by driving the plastic rivet into the plastic washer through the lower hole, so that the riveting operation can be performed easily and securely. And, it can be performed in a short time.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

First, before explaining the riveting apparatus, a plastic rivet (hereinafter referred to as a rivet) R and a plastic washer (hereinafter referred to as a washer) W for connecting and fixing a work P such as a plastic sheet will be described with reference to FIGS. It will be described based on.

The rivet R includes a shaft portion r1 and the shaft portion r1.
A head r2 integrally formed on the upper end of the shaft and having an outer diameter larger than the outer diameter thereof, and an integrally formed outer peripheral surface of the lower end of the shaft r1 having an outer diameter slightly larger than the outer diameter. It is composed of a part r3. Then, a rivet setting device 8 to be described later is provided from the head portion r2 to an intermediate position of the shaft portion r1.
Hole r into which the pin 58 of the guide pin 53 constituting the
4 are formed (see FIGS. 8 and 9).

On the other hand, the washer W is integrally formed on the inner peripheral surface of the hole w2 of the main body w1 and a dish-shaped main body w1 having a hole w2 formed in the center thereof, and has a collar portion w3 having an appropriate number of notches w4. And a reinforcing portion w5 that is integrally formed on the inner peripheral edge of the hole w2 of the main body w1 and has a height that substantially matches the outer peripheral edge of the main body w1. The flange portion w3 described above is directed toward the center of the main body w1. In addition to being slightly inclined so as to hang down, its inner diameter is formed to be slightly smaller than the outer diameter of the locking portion r3 formed on the shaft portion r1 of the rivet R described above (FIG. 1).
0 and FIG. 11).

Therefore, when the rivet R is driven into the washer W, the locking portion r3 of the rivet R pushes open the flange portion w3 of the washer W while bending the flange portion w3 of the washer W outward.
As a result of being fitted in 3, the rivet R and the washer W are connected and fixed.

The material of the rivet R and the washer W is preferably polypropylene or polyethylene having a certain strength and hardness.

Next, such a rivet R and washer W
Riveting device 1 for connecting and fixing workpieces P using
Will be described.

As shown in FIG. 1, the riveting apparatus 1 includes a support column 2 and an upper arm 3U integrally connected to the upper portion of the support column 2 in the front-rear direction (left-right direction in FIG. 1). And a frame 4 including a lower arm 3D, a washer transfer device 5 provided on the lower arm 3D of the frame 4 in the front-rear direction, and sequentially transferring the washers W downward one by one on the same axis at the rivet position, and the frame 4 The punching device 6 provided at the front end of the lower arm 3D for moving the punch 33 up and down through the washer W transferred by the washer transfer device 5 and the upper arm 3U of the frame 4 in the front-rear direction, and the rivet R at the rivet position. A rivet transfer device 7 for sequentially transferring one by one on the same axis and a frame 4
The rivet transfer device 7 is provided at the front end of the upper arm 3U.
The rivet driving device 8 drives the rivet R transferred by the rivet R toward the rivet position, and the die 9 which cooperates with the punch 33 of the punching device 6 to form the pilot hole p for inserting the rivet R in the work P. ing.

Next, the washer transfer device 5 and the punching device 6 constituting the riveting device 1 will be described with reference to FIGS. 2 and 3.

The washer transfer device 5 includes a transfer rail 11 fixed to the lower arm 3D and a delivery device 12 for the washer W.
It consists of

The transfer rail 11 is an elongated rail body 1.
3 and a transparent cover plate 14 that covers the upper surface of the rail body 13, and the rail body 13 has a sliding groove 13a having a cross-sectional shape matching the outer shape of the washer W from one end thereof, as shown in FIG. In addition to being formed in the longitudinal direction at the center of the upper surface toward the vicinity of the other end, two air grooves 13b, 13b are formed on both sides of the sliding groove 13a with a slight distance from one end to the other. It is formed in parallel to the vicinity of the edge. And these runways 1
On the upper surface of the rail main body 13 that divides the air groove 13b from the air groove 3a, the introduction groove 1 inclined from the air groove 13b to the sliding groove 13a toward the downstream side which is the transfer direction of the washer W.
3c are regularly formed at intervals. Further, a connection hole 13d formed in the rail body 13 communicates with the base end of the air groove 13b and is connected to an air source (not shown).

As a result, when the cover plate 14 covers the upper surface of the rail body 13, the sliding groove 13a and the air groove 13b are formed.
The upper opening portions of the introduction groove 13c and the introduction groove 13c are closed to form a runway, an air passage, and an introduction passage, respectively. Then, from the air source (not shown), the connection hole 13d
The compressed air supplied to the air passage through the air passage is ejected toward the downstream side of the runway via the introduction passage, and as described later, the washer W of the runway can be transferred to the downstream side.

In this case, the introduction grooves 13c may be provided only on the upstream side, in addition to being regularly formed at uniform intervals.
It can be provided only on the upstream side and the downstream side in a hollow state, or it can be provided irregularly so that it is dense from dense to sparse from the upstream side to the downstream side, and the interval and arrangement are optimal depending on the size of the washer W and the transfer distance. It should be designed to. Further, the introduction groove 13c may be formed on a portion other than the upper surface of the rail body 13.

When the runway is formed in conformity with the outer shape of the washer W, the cross-sectional shape of the runway may be slightly changed so as not to impair the transfer of the washer W. It is also possible to use a small passage for compressed air to float the washer W.

Further, although the air passage is formed in the longitudinal direction of the transfer rail 11, it is not always necessary to form it in the entire longitudinal direction of the transfer rail 11. For example, depending on the transfer distance of the washer W, it may be formed only in the base portion thereof. Good.

On the other hand, the cover plate 14 which covers the upper surface of the rail body 13 is provided with a supply hole 14a for the washer W which is located immediately above the sliding groove 13a in the vicinity of the rear end thereof and faces the supply hole 14a. A shooter 16 for guiding the washer W from the hopper 15 of the washer W (see FIG. 1) through the guide passage 16a is provided above it.

Further, the above-mentioned supply hole 14a and air groove 13 are provided.
The rail main body 13 between the base end of b and the stopper 1 is normally biased so as to project inward of the sliding groove 13a.
7, the washer W pushed to a position beyond the stopper 17 by the pusher 26 of the delivery device 12 described later is prevented from retreating by the stopper 17. The position of the stopper 17 is determined so that at least one washer W, which is prevented from retreating by the stopper 17, can stay with the base end of the air groove 13b.

Therefore, the air groove 13 is provided on the upstream side of the runway.
One or more washers W between the base end of b and the stopper 17.
Will be sealed by staying, and the outflow of the compressed air jetted to the runway to the upstream side is prevented.

Further, the rail body 13 has a sliding groove 13a.
Is provided near the downstream end of the washer W, and the regulating member 18 is normally urged via a spring so that its tip projects inward of the sliding groove 13a. . Then, the pusher 19 retracts so as to allow the washer W to move forward in conjunction with the movement of the pusher 19 to move forward.

Further, on the downstream side of the rail body 13, there is a small hole 13e which is continuous with the downstream end of the sliding groove 13a and which substantially coincides with the outer diameter of the washer W, and a small distance forward from this small hole 13e. Small holes 13f are formed respectively, and further, on the lower surface of the rail body 13, these small holes 13e,
A communication groove 13g having a width and a depth capable of passing one washer W is formed so as to connect 13f. These small holes 13e and 13f and the communication groove 13g
The lower arm 3D forms the bottom surface of the lower arm 3D by arranging the rail body 11 on the upper surface of the lower arm 3D to close the lower surface opening thereof. The rail main body 13 and the lower arm 3D have a cross-sectional shape that substantially matches the cross-sectional shape of the communication groove 13g, and a cylinder (not shown) extends from the rear end of the small hole 13e through the communication passage 13g to the small hole 13f. A pusher 19 that is slidable between the rear end is provided. On the other hand, facing the small hole 13f of the rail body 11, the cover plate 14 is formed with an opening 14b that substantially matches the outer diameter of the washer W. The small hole 13f and the opening 14b are formed on the axis of the rivet position.

Therefore, when the pusher 19 slides forward through a cylinder (not shown), the restriction by the restriction member 18 is released, and at that time, compressed air is ejected to the runway, so that the restriction member 18 is used. The washer W, whose transfer to the front was blocked, is pushed forward to move the small hole 13
fall into e. In this state, the pusher 19 moves forward to close the communication groove 13g, and eventually the washer W that has fallen into the small hole 13e is placed on the upper surface of the pusher 19. On the other hand, when the pusher 19 retreats, the washer W placed on the upper surface of the pusher 19 falls on the lower arm 3D forming the bottom surface of the small hole 13e.
When 9 moves forward again, the communication groove 13g is formed from the bottom surface of the small hole 13e.
Through the small hole 13f formed on the axis of the rivet position
The washer W can be pushed out.

Alternatively, the runway may be extended to the small hole 13f and the washer W may be directly transferred. In this case, the regulating member 18 may be arranged immediately before that.

On the other hand, the delivery device 12 of the washer W includes a motor 21 provided on the lower arm 3D, a cam 22 connected to an output shaft 21a of the motor 21, and a transfer rail 11.
Of the slider 24, which is slidable along the guide 23 fixed to the lower arm 3D so as to be continuous with the base end of the, and a link 25 that rotatably connects the slider 24 and a position eccentric from the axial center of the cam 22. And a pusher 26 that is integrally connected to the slider 24 and is slidable along the sliding groove 13a of the rail body 13.

Therefore, the cam 22 is driven through the motor 21.
When is rotated, the link 25 connected to a position eccentric from the axis moves reciprocally for a distance corresponding to twice the eccentric distance, so that the slider 24 connected to the link 25 moves along the guide 23. The pusher 26 fixed to the slider 24 slides back and forth along the sliding groove 13a. At this time, when the pusher 26 slides forward, its front end reaches the position immediately before the stopper 17 beyond the supply hole 14a of the cover plate 14 (solid line position in FIG. 2). When the pusher 26 slides backward, the rear end is
The cover plate 14 is located behind the supply hole 14a (the position indicated by the chain line in FIG. 2).

A punching device 6 is provided at the front end of the lower arm 3D. This punching device 6
A vertically extending guide 3d formed on the lower arm 3D
Pipe-shaped lifter 31 slidably fitted along
And a lever 32 whose tip is connected to the lifter 31 and which is swingably supported by the lower arm 3D, and a lifter 31.
A punch 33 slidably fitted along the inner peripheral surface of
The tip is connected to the punch 33 and the lower arm 3D
It is composed of a lever 34 that is pivotally supported by a cylinder and a cylinder (not shown) that individually rocks the levers 32 and 34. The lifter 31 is normally positioned so as to form the bottom surface of the small hole 13f described above, and a recess 31a that matches the curved bottom surface of the washer W is formed on the top surface thereof. The upper end of the punch 33 is usually located directly below the depression 31a.

Therefore, by swinging the lever 32 through a cylinder (not shown), the lifter 31 can be moved up and down along the guide 3d of the lower arm 3D,
Similarly, by swinging the lever 34, the lifter 3
The punch 33 can be raised and lowered with respect to 1.

As a result, the one washer W pushed out by the pusher 19 described above has the recess 3 of the lifter 31.
By being lifted up by the lifter 31 after being accommodated in the la 1a, the lifter 31 can be lifted outside the transfer rail 11 through the small hole 13f and the opening 14b. In the end, the washer W is placed on the transfer rail 11. It is pressed against the lower surface of P. At this time, the lever 3
By oscillating 4, the punch 33 can be moved up and down along the inner peripheral surface of the lifter 31, and as a result, the work P
The punch 33 is moved up and down through the collar portion w3 of the washer W pressed against the lower surface of the punch 33.

Next, a rivet transfer device 7, a rivet setting device 8 and a die 9 which constitute the riveting device 1.
This will be described with reference to FIGS.

The rivet transfer device 7 comprises a hopper 41 (see FIG. 1) for accommodating the rivet R, a cam (not shown) rotatably provided in the hopper 41, and an oscillating plate interlocking with the cam. Of the rivet supply device 42 (see FIG. 1) and is fixed to the upper arm 3U of the frame 4 so that the tip end faces the guide passage 54a of the rivet setting device 8 described later. The rivet R includes an inclined rail 43 and a shutter (not shown) provided in front of the inclined rail 43 and having a pair of pins that can alternately project in the left-right direction (the direction orthogonal to the paper surface of FIG. 1). ing.

Therefore, by rotating the cam of the rivet supply device 42, the rivet R accommodated in the hopper 41 is scooped up by the rocking plate, and the inclined rail 43.
I am trying to drop it in. And the inclined rail 43
The plurality of rivets R arranged along the slides slide one by one through the shutter (not shown) into the front end thereof, that is, the guide passage 54a of the rivet setting device 8.

On the other hand, the rivet setting device 8 includes the upper arm 3
A base 52 that can be raised and lowered via an air cylinder 51 attached to U, and a guide pin 53 that can be raised and lowered via an air cylinder (not shown) attached to this base 52.
And the guide passage 54 located on the axis of the guide pin 53.
It is composed of a guide lever 54 having a formed therein and a work retainer 55 fixed to the base 52. The guide pin 53 is arranged such that the guide pin 53 and the guide passage 54a are positioned on the axis of the small hole 13f formed at the tip of the transfer rail 11 described above. Has been formed.

The guide pin 53 includes a shaft 57 slidably supported along a bearing 56 attached to the base 52,
A pin 58 is integrally fixed to the lower end of the shaft 57, and the shaft 57 and the pin 58 can be moved up and down in the vertical axis direction by expanding and contracting an air cylinder (not shown).

Further, the guide lever 54 has the guide pin 5
A case 59 fixed to the base 52 by forming a notch 59a through which the third shaft 57 can pass, and a shaft 59 rotatably provided around the support shaft 60 fixed to the base 52 below the case 59. The spring 62 includes a pair of left and right lever bodies 61, 61 that have a joint surface that is supported and can be separated from each other, and springs 62, 62 respectively disposed between the lever bodies 61, 61 and the case 59.
As a result of pressing the lever main body 61 outside the support shaft 60, the pair of left and right lever main bodies 61, 61 are always urged in the direction in which their respective joint surfaces are joined. Grooves 61a, 61a having an arcuate cross section centered on the axis of the guide pin 53 are formed on the joint surfaces of the lever bodies 61, 61 from the upper end to the vicinity of the lower end. As a result, when the lever bodies 61, 61 are joined via the springs 62, 62 described above, the guide passages 54a of the guide lever 54 are formed by the grooves 61a, 61a.

In this case, the pair of left and right lever bodies 61 of the guide lever 54 are pivotally supported around the support shaft 60 respectively, but the lever body slides laterally along a guide groove (not shown) formed in the base 52. The number of lever bodies 61 is not limited to two.

The guide passage 54a has a large diameter portion 54a ₁ whose inner diameter is slightly larger than the outer diameter of the shaft 57 of the guide pin 53 and the head portion r2 of the rivet R described above in order from the top. Taper-shaped locking portion 54 that reduces
a ₂ and a small diameter portion 54a _{3 having} an inner diameter such that the shaft portion r1 of the rivet R can be loosely fitted. The large diameter portion 54a ₁ of the guide passage 54a is notched in the front-rear direction, and the inclined rail 43 of the rivet transfer device 7 is arranged facing the notch behind the large diameter portion 54a ₁ .

On the other hand, the work retainer 55 comprises retainer members 63 and 63 integrally fixed to the lower end of the base 52 so as to sandwich the die 9 described later from the left and right, and the lower end of the retainer member 63 is slightly smaller than the lower end of the die 9. It is located below.

Further, the lower end of the guide lever 54 is provided with a die 9 located on the axis of the guide pin 53 and having a die hole 9a formed therein. The die 9 is composed of a pair of left and right die bodies 71, 71 each integrally connected to the pair of left and right lever bodies 61, 61 and having a joint surface that can be contacted and separated. When the lever bodies 61, 61 are joined together, The die bodies 71, 71 are also joined in the same manner.
And, on the respective bonding surfaces of the die bodies 71, 71,
Grooves 71a, 71a each having an arcuate cross section centered on the axis of the guide pin 53 are formed. As a result, when the die bodies 71, 71 are joined, the grooves 71a, 71
By a, a die hole 9a through which the punch 33 of the punching device 6 described above can be inserted is formed. In addition, die 9
A discharge portion 9b that is open to the side is formed at the front side of the compressed air passage 61b. The compressed air passage 61b is formed at one end of the lever body 61 so as to face the discharge portion 9b.

Next, the operation of the riveting apparatus 1 will be described. First, the washer W of the hopper 15 is guided to the guide passage of the shooter 16 so that the washer W drops onto the runway of the transfer rail 11 with the curved portion of the washer W facing downward. It is continuously introduced into 16a. And the guide passage 1 of the shooter 16
6a falls through the supply hole 14a formed in the cover plate 14 onto the sliding groove 13a. On the other hand, as the motor 21 of the delivery device 12 rotates, the pusher 26 slides forward and pushes the washer W that has fallen into the sliding groove 13a downstream beyond the stopper 17. The washer W pushed out by the pusher 26 until it goes beyond the stopper 17.
Since the stopper 17 prevents the backward movement,
Similarly, the pushers 26 sequentially push out the washers W so that a suitable number of them are retained downstream of the stopper 17.

By the way, of the washers W retained in front of the stopper 17, when the most downstream washer W is pushed out until it reaches the base end of the air passage, compressed air is supplied to the air passage through the connection hole 13d. Further, the compressed air is guided to the runway via the introduction path. In this case, since the upstream side of the runway is sealed by the appropriate number of washers W that stay in front of the stopper 17, the compressed air introduced into the runway flows exclusively to the downstream side. As a result, the washer W is transferred to the downstream side while being floated by the air flow. Then, it abuts on the regulation member 18 or abuts on the rearmost washer W which is restrained from being transported forward by the regulation member 18 and stops.

Next, when the pusher 19 slides forward through a cylinder (not shown), the restricting member 18 interlocks and separates from the runway. At this time, when compressed air is supplied to the runway, the washer W, which has been prevented from moving forward by the restricting member 18, receives the supply of compressed air and is pushed out, and falls into the pocket 13e. And pocket 13
The washers W that have fallen to e pass through the communication groove 13g one by one by the forward movement of the pusher 19 and then pass through the pockets 13f.
Is pushed out to the depression 31a of the lifter 31 waiting to form the bottom surface of the lifter 31. In this way, the transfer rail 11
The washer W supplied to the upstream side of the is transferred to the axis line of the downstream rivet position.

On the other hand, the rivet R is the rivet supply device 4
It is dropped from the hopper 41 to the inclined rail 43 via 2 and the shutter (not shown) is arranged. here,
When the shutter operates, the rivets R slide down one by one along the inclined rail 43 (see FIG. 5), pass through the opening 52a formed in the base 52 and drop from the tip of the inclined rail 43, and as a result, the rivets R are As shown in FIG. 6, the head portion r2 is held by the locking portion 54a ₂ of the guide passage 54a.

In this way, one rivet R and one washer W are transferred on the axis of the rivet position.

Here, when the work P is placed on the cover plate 14 of the transfer rail 11 constituting the washer transfer device 5 and a switch (not shown) is operated, the air cylinder 5
1 is extended to lower the substrate 52, and the work P is held between the cover plate 14 of the washer transfer device 5 and the work presser 55.
The lifter 31 is lifted by a cylinder (not shown) while being pressed and held by the pressing member 63, and the washer W held in the recess 31a is pushed upward to the outside of the transfer rail 11 through the small hole 13f and the opening 14b. It is closely attached to the lower surface of the work P.

Then, when the punch 33 is moved upwards with respect to the lifter 31, the work P is pierced and is fitted into the die hole 9a of the die 9 formed on the axis of the work P. As a result, the work P is fitted with a pilot hole. p can be formed. On this occasion,
Since punch scraps generated by forming the pilot hole p are lifted to the discharge portion 9b through the die hole 9a of the die 9, when compressed air is supplied to the passage 61b, the compressed air is blown to the discharge portion 9b. The punch scraps can be blown off to the side.

When the pilot hole p is formed in the work P in this way, the punch 33 descends to its original position and then the guide pin 53 descends via a cylinder (not shown). When the guide pin 53 descends, the shaft 57 is fitted into the large diameter portion 54a ₁ of the guide hole 54a formed in the guide lever 54,
Finally, the pin 58 moves from the head r2 of the rivet R to the shaft r1.
While being fitted into the hole r4 formed up to the midway position, the lower end surface of the shaft 57 contacts the tapered locking portion 54a ₂ . Furthermore, when the guide pin 53 continues to descend, the shaft 57 pushes the locking portion 54a ₂ sideways and opens it. That is, as a result of the guide lever main body 61 rotating around the support shaft 60 against the urging force of the spring 62, the joining surfaces thereof are separated, and a space through which the shaft 57 of the guide pin 53 can pass is formed (FIG. 7). At this time, the die bodies 71, 71 integrally fixed to the lever bodies 61, 61 also rotate in the left-right direction, and similarly, their joint surfaces are separated from each other so that the shaft 57 can pass therethrough.

When the joint surfaces of the lever bodies 61 and 61 and the joint surfaces of the die bodies 71 and 71 are separated from each other to form a space through which the shaft 57 can pass, the pin 58 of the guide pin 53 is formed.
The rivet R in which is fitted is pushed down following the lowering of the guide pin 53, and is pushed into the prepared hole p of the work P,
Further, the locking portion r3 is fitted into the flange portion w3 of the washer W which is closely attached to face the lower surface of the prepared hole p.

As a result, the work P can be pinched and connected between the rivet R and the washer W (see FIG. 12).

In this embodiment, the case where the rivet R is driven from above has been described, but it is also possible to drive the rivet R from below. In this case, the upper and lower relations may be relatively reversed, such as by disposing the washer W on the upper surface of the work P.

[0057]

As described above, according to the first aspect of the present invention, the plastic rivet and the plastic washer are sequentially transferred one by one so that the work is confronted with the work on the axis of the rivet position with respect to the work. After forming the plastic rivet fitting pilot hole in the work through the plastic washer transferred to the rivet position, the plastic rivet is driven into the plastic washer through the pilot hole formed in the work, so that the work is performed through the plastic rivet and the plastic washer. Can be connected and fixed, and the riveting work can be performed easily and reliably in a short time.

According to the second aspect of the invention, a rivet transfer device for sequentially transferring the plastic rivets one by one on the axis line of the rivet position for the work, and the plastic rivet and the work transferred by the rivet transfer device. A washer transfer device for sequentially transferring the plastic washers one by one on the axis line of the rivet position with respect to the work piece so as to face each other, a punching device for raising and lowering the punch through the plastic washer transferred by the washer transfer device, and a rivet transfer device The rivet driving device for driving the plastic rivet transferred by the die and the die for forming the plastic rivet fitting pilot hole in the work in cooperation with the punching device, and the plastic rivet fitting pilot hole at the rivet position of the work. Forming Rutotomoni, plastic rivet through the lower hole by implanting a plastic washer, can be reliably connected and fixed at its rivets position the workpiece through the plastic rivets and plastic washers.

[Brief description of drawings]

FIG. 1 is a side view showing a riveting apparatus of the present invention.

FIG. 2 is a plan view showing a washer transfer device and a punching device in the riveting device of FIG. 1, with some parts omitted.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

5 is a sectional view showing a rivet transfer device, a rivet setting device and a die in the riveting device of FIG. 1 with some parts omitted.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a cross-sectional view showing a driven state of a plastic rivet corresponding to FIG.

FIG. 8 is a perspective view of a plastic rivet.

9 is a cross-sectional view of FIG.

FIG. 10 is a perspective view of a plastic washer.

11 is a cross-sectional view of FIG.

FIG. 12 is a cross-sectional view showing a state in which works are connected and fixed using a plastic rivet and a plastic washer.

[Explanation of symbols]

 1 riveting device 4 frame 5 washer transfer device 6 punching device 7 rivet transfer device 8 rivet setting device 9 die R plastic rivet W plastic washer P work p pilot hole

Claims (2)

[Claims] 1. A plastic rivet and a plastic washer are sequentially transferred one by one so that the work is sandwiched and confronted on the axis line of the rivet position with respect to the work, and the plastic rivet is attached to the work through the plastic washer transferred to this rivet position. A riveting method characterized in that, after forming a fitting pilot hole, a plastic rivet is driven into a plastic washer through a pilot hole formed in the work to connect and fix the work through the plastic rivet and the plastic washer. 2. A rivet transfer device for sequentially transferring the plastic rivets one by one on the axis of the rivet position for the work, and a rivet position for the work so that the plastic rivet transferred by the rivet transfer device and the work face each other. A washer transfer device for sequentially transferring the plastic washers one by one on the axis of, and a punching device for raising and lowering the punch through the plastic washer transferred by the washer transfer device,
It consists of a rivet driving device that drives the plastic rivet transferred by the rivet transfer device, and a die that cooperates with a punching device to form a pilot rivet insertion pilot hole in the work. A riveting device characterized by forming a pilot hole for use and driving a plastic rivet into a plastic washer through the pilot hole.