Metal working – Means to assemble or disassemble – With magazine supply
Reexamination Certificate
2001-06-13
2003-10-07
Vidovich, Gregory (Department: 3726)
Metal working
Means to assemble or disassemble
With magazine supply
C227S119000, C227S136000, C227S139000
Reexamination Certificate
active
06629360
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a continuous riveter for continuously ejecting blind rivets that effect the caulking on metal plates and so on (the blind rivet being hereafter referred to as a rivet).
2. Description of the Related Art
The typical continuous riveter includes one that is disclosed by Japanese Patent Application Laid-open No. Hei 7-236936 (Title of the Invention: “Riveter”) and shown in
FIGS. 8
to
13
, and another prior thereto that is shown in FIG.
14
.
FIGS. 8
,
9
and
14
show a state where a shank R
1
of the rivet R is held in a continuous riveter to insert a head R
2
into a hole of a metal plate H, which is followed by “caulking”.
Next, as shown in
FIG. 10
, a jaw case piston
20
is raised to move a jaw case
22
upwardly, whereby the pair of jaw
24
is biased to the lower part by springs via the jaw pusher
26
. The jaw
24
glides to the lower part of the tapered surface
23
(refer to
FIG. 13
) of the jaw case
22
, to thereby come close to each other and is raised upwardly by clamping the shank R
1
of the rivet R (FIG.
9
). Accordingly, the jaw
24
clamps the shank R
1
and moves upwardly, so that “caulking” is conducted with the raise of the shank R
1
. Subsequently, the head R
2
is held at the tip end of the nose piece
32
so the shank R
1
is cut off from the head portion R
2
.
Next, as shown in
FIG. 10
, when a nose piston
30
is raised, a cylinder
31
is raised together with a nose piece
32
. Accordingly, the shank R
1
is moved upwardly away from the metal plate H. Then, as shown in
FIG. 11
, the shank R
1
is vacuum-collected into a shank accommodating case
14
by a vacuum ejector
11
, and the jaw case piston
20
and the nose piston
30
are moved up to their upper dead points. Therefore, the nose piece
32
is moved upwardly above a next shank R
1
.
At this time, as shown in
FIG. 12
, a feeding claw
46
a
which is connected to a feeding hole T
6
of a blind rivet holder T, pulls out the blind rivet holder T, which has been moving forward by the piston
45
of the tape air cylinder
42
, from the accommodation case
40
to move it for one shank, and sets the tip end of the shank R
1
on top of the axis at the lower part of the nose piece
32
(refer to FIGS.
11
and
12
).
As described above, after caulking one shank, the cylinder
31
is moved downwardly with the jaw case
32
to caulk the next shank R
1
.
The continuous riveter shown in
FIG. 14
is designed such that the nose piece
32
is separated, but the structure of “caulking” is the same as that shown in
FIGS. 8
to
13
. The structure of “caulking” of the present invention is the same as that shown in
FIGS. 8
to
13
.
In the above, a distance between the rivets R is required to be set so as not to hinder the lowering movement of the cylinder
31
.
FIG. 13
is an explanatory view, which is a side view of FIG.
12
.
FIGS. 15
to
17
show a “blind rivet holder” which is registered as Japanese Utility Model Registration No. 3028739 by the present applicant before this application. This blind rivet holder is designed such that the rear portion of the riveter can be held upwardly to ease the rivet ejecting operation. Further, in order to increase the number of the rivets R held in an elongated plastic member T
1
which forms the blind rivet holder T, the rivets R are supported by the upper and lower tabs T
4
and T
5
respectively not in an perpendicular direction with respect to the longitudinal direction of the elongated plastic member T
1
but in an inclined direction. Even if the continuous riveters shown in
FIGS. 8
to
13
and
FIG. 14
are modified to use the blind rivet holder T, a rivet distance is required where the lowering movement of the cylinder
31
is not hindered as shown in
FIGS. 15
to
17
.
As described above, the conventional continuous riveters need to set the rivet R distance in the blind rivet holder T to be such rivet distance as to avoid hindering the lowering movement of the cylinder
31
. Therefore, the riveters suffer from a problem in that the large number of rivets R can not be accommodated in the accommodation case
40
.
SUMMARY OF THE INVENTION
The present invention has been made in view of the aforementioned problem. An object of the present invention is to provide a continuous riveter which can make the rivet distance in the blind rivet holder T small, thereby making it possible to accommodate the large number of the rivets R in the small accommodation case
40
.
According to the present invention, there is provided a continuous riveter comprising:
a chuck cylinder;
a nose piston inserted to the chuck cylinder so as to be movable vertically, and provided at its lower end with an elongated cylinder;
a jaw case piston with a jaw case inserted to the cylinder so as to be movable vertically;
a jaw, internally inserted to a lower end of the jaw case and engageable and disengageable with and from a tapered surface on an internal lower end of the jaw case, for holding and releasing a shank of a blind rivet;
a jaw pusher elastically biased to abut against a top of the jaw;
a nose piston which is disposed at a lower end of the cylinder, and to which the shank of the blind rivet is to be inserted; and
a rivet supply section including:
an accommodation case for accommodating therein a web-like blind rivet holder in a wound state which is mounted with a blind rivet; and
a tape air cylinder for guiding the blind rivet holder along a guide plate and supplying the blind rivet mounted on the blind rivet holder one by one, characterized in that:
the guide plate is elongated from the accommodation case of the rivet supply section, and includes a linear feed section of a predetermined length and a bent section inclined at a predetermined angle with respect to the linear feed section, whereby a perpendicular section of the blind rivet holder is bent along the bent section, after being passed through the linear feed section of a predetermined length;
a pressing plate is provided, for pressing and guiding the perpendicular section of the blind rivet holder, along the guide face from the linear feed section to the bent section of the guide plate, whereby the blind rivet holder sent out linearly by a feeding claw that reciprocatingly linearly moves by means of the tape air cylinder, is guided from the linear feed section to the bent section, and is then bent therealong due to the pressing plate; and
the cylinder of the nose piston is positioned on the axis of the shank of the blind rivet in the upper and lower tab immediately after the blind rivet holder has passed the linear feed section of the guide plate and has been bent at the bent section, and is disposed so that the axis of the blind rivet corresponds to the cylinder axis.
REFERENCES:
patent: 5273200 (1993-12-01), Hoefler
patent: 5452796 (1995-09-01), Ohuchi et al.
patent: 5544407 (1996-08-01), Ohuchi et al.
patent: 6499642 (2002-12-01), Amada
Compton Eric
McGlew and Tuttle , P.C.
Opt Engineering Company Limited
Vidovich Gregory
LandOfFree
Continuous riveter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous riveter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous riveter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3128416