JPS6032903Y2 - Automatic locking device for perforated swage nuts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an apparatus for automatically supplying a perforated staking nut to a metal panel and driving and locking the nut into the panel.

This type of device is attached to a press machine, and the nut itself punches a hole in the panel by driving a swiveling nut into the metal panel, and the nut is swaged into the drilled hole to secure it. If you supply nuts and drive them in when there is no panel, the nuts will remain on the guide side.

If such residual nuts are not removed immediately, the next nut may feed on top of the remaining nuts, damaging the plunger or guide, and also making it impossible to drive nuts into this panel if a panel is fed. turn into.

Conventionally, under the supervision of a worker, if a nut is supplied without a panel, the press machine is immediately stopped, and the worker inserts his/her hand into the press machine and prevents the nut from remaining on the goo side. I was trying to get rid of Natsuto.

However, such work not only requires special inspection shells, but also requires stopping the press machine, which reduces work efficiency.

Furthermore, it is extremely dangerous for a worker to insert his/her hand into a press machine to remove nuts.

This idea was developed based on the above circumstances, and its purpose is to supply nuts when there is a panel, and automatically stop the supply of nuts when there is no panel, so that workers can It is an object of the present invention to provide an automatic locking device for a perforated swage nut that is unnecessary and eliminates the danger of manual removal.

An embodiment of this invention will be described below based on the drawings.

In the figure, 1 is a bed of a press machine, and 2 is a die fixed on the bed 1.

Further, numeral 3 is a ram that reciprocates in the vertical direction opposite to the bed 1, and a mounting board 4 is fixed to the lower surface of this ram 3.

A support base 5 is fixed to the mounting board 4, and a plunger 6 projecting toward the die 2 is attached to the support base 5.

Further, the support base 5 is provided with a shank accommodation hole 10, into which a shank 11 is fitted so as to be slidable in the vertical direction.

An elastic body such as a coil spring 12 is housed between the shank 11 and the mounting board 4.
1 is always biased downward.

An engagement recess 13 is formed on the side of the shank 11 at a position facing the tip of a stop pin 32, which will be described later.

A step part 14 as an engaging part is provided in this engaging recess 13, and with this step part 14 as a boundary, a first engaging part 13a with a shallow bottom on the upper side and a second engaging part 13b with a deep bottom on the lower side. It has become.

During normal operation, the first engaging portion 13 is as shown in FIG.
By engaging the stop pin 32 with the earthen wall of a,
The lowest position of the shank 11 relative to the ram 3 is regulated.

A nut supply block 20 is attached to the lower end of the shank 11.
is installed.

Inside this nut supply block 20, the plunger 6 is provided.
A nut supply hole 21 is provided through which the nut is reciprocally movable.

A nut delivery port 22 that opens in a direction perpendicular to the nut supply hole 21 is provided on the side surface of the nut supply hole 21 .

This nut delivery port 22 is in a state where the shank 11 is at its lowest position relative to the ram 3, as shown in FIG. When the nut supply hole 21
It opens inward.

Further, a conveyance path 23 is connected to the nut delivery port 22, and a flexible chute 24 is connected to this conveyance path 23.
is connected.

And this chute 24 has a perforated caulking nut 25...
・is being supplied in one line, with support being given in turn.

A solenoid 30 is attached to the mounting board 4.

The solenoid 30 has a movable core 31 that moves horizontally.The movable core 31 moves back and forth in the horizontal direction, and the stop pin 32 serving as a stopper is connected to the tip of the movable core 31.

When the solenoid 30 is energized, the movable iron core 31 moves backward, so that the stop pin 32 resists the biasing force of the coil spring 33 and reaches the A position shown in FIG. When the solenoid 30 is moved backward and the solenoid 30 is demagnetized, it is pressed against the bottom wall of the engagement recess 13 by the urging force of the coil spring 33.

A detection mechanism, for example, a microswitch 36, is provided on the bed 1 to detect the presence or absence of the panel 35.

This microswitch 36 is electrically connected to the solenoid 30, and when the panel 35 is on the microswitch 36, it is turned on to excite the solenoid 30, and when the panel 35 is not present, it is turned off and the solenoid 30 is turned on. This is to release the excitation of the

Next, the operation of the apparatus of the above embodiment will be explained.

The panel 35 is automatically fed along the direction of the arrow B over the bed 1 at predetermined intervals, for example, by a stroke S, and is placed on the die 2.

When the ram 3 is lowered from the state shown in FIG. 1, the lower end surface of the nut supply block 20 first hits the panel 35 on the die 2, and the lowering of the nut supply block 20 is stopped.

As the ram 3 continues to descend, the plunger 6 moves into the nut supply hole 2 while the nut supply block 20 remains stopped.
Descend within 1.

Then, as shown in FIG. 3, the tip 6 of the plunger 6
Since a pushes out the punched caulking nut 25 in the nut supply hole 21 toward the panel 35, the panel 35 is punched by the nut 25 itself, and the nut 25 is press-fitted into the punched hole.

The nut 25 therefore engages the panel 35 as shown in FIG.

Thereafter, the ram 3 moves to the upward stroke, but at this time the presence or absence of the panel 35 to be sent onto the die 2 next has already been detected by the microswitch 36.

That is, when the panel 35 is on the switch 36, the switch 36 is turned on and the solenoid 30 is energized, thereby causing the stop pin 32 to retreat to the A position.

When the ram 3 rises, the plunger 6 and solenoid 30 rise while the nut supply block 20 and shank 11 remain in a stopped state, and the tip of the stop pin 32 also rises within the locking recess 13.

Then, the stop pin 32 moves up by an 11-minute stroke and engages with the upper wall of the first engaging portion 13a, so that the shank 1
Since the ram 1 and the ram 3 are integrated, the shank 11 starts to rise.

On the other hand, since the plunger 6 has also risen relative to the nut supply block 20 by the stroke 1□, the first
As shown in the figure, the nut delivery port 22 is opened, and the nut 25 is delivered into the nut supply hole 21 from this opening.

On the other hand, when the panel 35 is not on the switch 36, the switch 36 is turned OFF and the solenoid 30 is demagnetized as shown in FIG. It is pressed against the bottom wall of the second engaging portion 13b of No. 13.

Therefore, the shank 11 is moved to the stop pin 3 before returning for 11 minutes during the return stroke.
2 gets caught on the stepped portion 14, and the shank 11 and the ram 3 become integrated, causing the shank 11 to start rising.

As a result, the tip 6a of the plunger 6 closes the opening of the nut delivery port 22, so that the nut 25 is not sent into the nut supply hole 21.

However, according to the above embodiment, when the panel 35 to be sent onto the die 2 is not on the microswitch 36, the nut 2
Since the nut 5 is not sent into the nut supply hole 21, the nut 25 is not driven into the die 2 side even if the plunger 6 descends.

Therefore, since the nut 25 does not remain on the die 2, problems such as successive driving of the next nut are prevented, and damage to the plunger 6 and the die 2 is prevented.

Moreover, since the nut 25 does not remain in the die 2, there is no need for a special inspector like in the past, and there is no need for the operator to insert his/her hand into the press machine, resulting in extremely high safety.

Furthermore, since the solenoid 30 is used to electrically actuate the stop pin 32, the actuation speed of the stop pin 32 is extremely fast compared to when using an air cylinder etc. Therefore, the press speed is considerably faster. can also operate according to that speed.

Further, according to the above embodiment, a stop function can be added to a conventional device without a stop function by simply providing the solenoid 30, the microswitch 36, and the engagement recess 13, so there is no need to modify the entire device, and the cost is reduced. There are advantages to implementing it.

In the above embodiment, the stop pin 32 is moved back when the solenoid 30 is energized, but the present invention is not limited to this. For example, the stop pin 32 may be moved back when the solenoid 30 is demagnetized. .

Furthermore, in the above embodiment, a stepped portion is formed on the engaging portion on the shank side to stop the shank in a fixed position, but it is also possible to form a stepped portion on the stop pin side to stop the shank in a fixed position. You can also do this.

Further, although the microswitch 36 is used as the detection mechanism in the above embodiment, it is of course possible to use a proximity switch, a phototube switch, or the like.

As detailed above, according to this invention, when the detection mechanism detects that there is no panel, the solenoid activates the stopper to stop the shank in the middle of the return stroke, thereby preventing the plunger from opening the nut delivery port. Therefore, nuts can be supplied only when there is a panel, and nut supply can be stopped when there is no panel.

Therefore, nuts are automatically supplied depending on the presence or absence of the panel, and problems such as nuts remaining on the die side are prevented.

This eliminates the need for special observers and eliminates the need to stop the press machine to remove residual nuts.
Improves operating efficiency.

Further, dangerous work for removing nuts can be eliminated.

Furthermore, since the nut delivery port is closed by a solenoid during the return of the shank, it is possible to quickly stop the supply of nuts in accordance with the speed of the press machine.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a longitudinal sectional view;
Figure 2 is a view taken along the line ■-■ shown in Figure 1, Figures 3 and 5 are longitudinal sectional views showing other states during operation, and Figure 4 is a view of the perforated caulking nut attached to the panel. It is a partially cutaway perspective view showing a locked state. 1...Bed, 2...Die, 3...
...Ram, 6...Plunger, 11...
...Shank, 12...Coil spring (elastic body), 13...Engagement recess, 14...
Stepped part (engaging part), 20...Nut supply block, 21...Nut supply hole, 22...Nut delivery port, 25...Drilling caulking Natsuto,
30... Solenoid, 32... Stop pin (stopper), 35... Panel, 36...
...Micro switch (detection mechanism).

Claims (1)

[Scope of utility model registration request] A guide on which a panel fixed to the bed side is placed, a plunger fixed to the ram side, and a goo attached to the ram side and biased toward the bed side by an elastic body and at a predetermined position relative to the plunger. a nut supply block having a nut supply hole provided in the shank and through which the plunger can freely reciprocate; a nut delivery port that communicates with the nut supply hole and supplies the drilled swaged nut into the nut supply hole when the panel returns by a predetermined stroke; a detection mechanism that detects the presence or absence of the panel; The solenoid includes a toremaid that is turned off and operates when there is no panel, a stopper that is operated by this solenoid, and an engagement portion that is formed on the shank when the stopper is engaged and disengaged, and the solenoid operates when there is no panel. By engaging a stopper with an engaging portion provided on the shank and stopping the shank in the middle of the return stroke, the plunger is stopped at a fixed position relative to the shank, and the plunger prevents the opening of the nut delivery port. An automatic locking device for perforated swage nuts.