JPH0352736Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention involves stopping the conveyed object, such as a substrate, in the middle of a conveyor to carry out work on the object, and then stopping the conveyed object when the work is completed. This relates to a stopper for a conveyor device that releases an object from stopping and allows the conveyor to continue conveying the object.

[Technical background of the invention and its problems]

As a conventional stopper of this type of conveyance device equipped with a detection sensor for detecting when the conveyed object reaches a predetermined position and is stopped, the ones shown in FIGS. 4 to 6 are known. There is.

This will be explained below.

1 is a conveyor belt for conveyance, on which substrates are sequentially placed and conveyed; for the sake of explanation, 2 is the first substrate, and 3 is the second substrate.

6 and 8 are sensors that detect the arrival of the substrates 2 and 3; 5 and 7 are sensors that detect that the substrates 2 and 3 have passed; 4a and 4b normally protrude into the path of the substrates 2 and 3; This is a stopper to stop this.

Therefore, when the board 2 is stopped against the stopper 4a and the board 3 is stopped against the stopper 4b, if the stop of the board 2 by the stopper 4a is released, the board 2 will move on the belt 1, but the rearmost part of the board 2 will be stopped. After passing the sensor 5, the stopper 4b returns to its return state, allowing the substrate 3 to advance.

That is, the conditions under which the board 3 is allowed to advance are as follows:
The sensor 6 confirms that the substrate 2 does not cancel and the sensor 5 confirms that the substrate 2 has passed, and at this time the stopper 4b confirms that the substrate 2 is not offset.
The suspension of is lifted.

Further, the signals from the sensors 6 and 8 are taken out to the outside to put the working device for the substrates 2 and 3 into a working state.

These sensors 5, 6, 7, 8 are operated by a switch 10 by an arm 9 which rotates when the conveyed object arrives.
A device that opens and closes is used.

As described above, the stopper and sensor of the conventional conveying device are each configured separately, so that the arrival and stopping of the conveyed object is performed separately, and it is difficult to ensure that the two coincide.

Since the arrival detection sensor and the passage detection sensor of the conveyed object are fixed at different positions, complicated adjustment work is required on site, such as adjusting the position with the stopper and adjusting the timer for control.

Furthermore, even if the conveyed object moves back by a minute amount after it has been stopped, this cannot be detected, which causes the relative position of the conveyed object and the working device to be out of order, making it impossible to perform accurate work.

[Purpose of invention]

The present invention is intended to eliminate the above-mentioned drawbacks of the stopper and sensor in conventional conveying devices.The stopper and sensor are integrated, and the movement of the stopper is detected by a detection means, so that the operations of both are synchronized. It is an object of the present invention to provide a sensor that can also be used as a stopper for a conveyance device, which can detect even a minute amount of backward movement of a conveyed object without requiring complicated adjustment work on site.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 11 denotes a stopper pin which is rotated against the substrate a being conveyed by the belt conveyor, and is attached to a rotatable support shaft 12.

A coil spring 13 is installed on the support shaft 12 to bias it counterclockwise in FIG. 1, and due to this biasing force, the stopper pin 11 abuts against the pin 14 and is stopped at the standby position.

Further, a rotating arm 17 is fixed to the support shaft 12, and is stopped by hitting the pin 16 of the solenoid 15 when the stopper pin 11 is in the vertical position as shown in FIG. is pin 1
6 is pulled in, and the stop of the rotating arm 17 is released.

Further, the support shaft 12 is provided with an arm rod 1 having a light shielding plate 19.
8 is attached, and the light shielding plate 19 blocks the light sensor 20 from light when the stopper pin 11 is vertical and the rotating arm 17 is stopped by the pin 16.
0 is supposed to give that signal.

When the stopper pin 11 is in the standby position, the light shielding plate 19 shields the second optical sensor 21 from light.

Reference numerals 22 and 23 are tension springs for pulling the pin 16 back to the standby position when the excitation of the solenoid 15 is stopped.

Therefore, the stopper pin 11 is connected to the coil spring 13.
It is in the standby position shown by the dashed-dotted line in FIG. 3, where it touches the pin 14 due to the force of
Rotate in the direction of the arrow in the figure.

Then, the support shaft 1 to which the stopper pin 11 is fixed
2 rotates, and the rotating arm 17 fixed thereto hits the pin 16 of the solenoid 15 to stop the rotation of the support shaft 12. Therefore, the stopper pin 11 is also stopped at a vertical position and the board a is held at that position. to stop.

At the same time, the light shielding plate 19 of the arm rod 18 attached to the support shaft 12 blocks the light beam of the optical sensor 20, so the optical sensor 20 becomes OFF, and the signal indicates that the board a has arrived and is stopped. is detected.

This signal is taken out to the outside and an appropriate working device is operated to perform the work.

The solenoid 15 is energized by the work completion signal of this work device, or by the work end signal from a switch operation when the work is performed manually, and the pin 16 is retracted to release the stoppage of the rotating arm 17. do.

Therefore, the stopper pin 11 becomes free,
The stopper pin 11 is rotated by the moving force of the conveyor with respect to the substrate a to the position indicated by the chain double-dashed line in FIG. 3 through which the substrate a can pass, thereby allowing the substrate a to pass.

When the passage of the substrate a is completed, the stopper pin 11 is returned to the standby position by the force of the coil spring 13, but at the same time, the light shielding plate 19 is moved toward the optical sensor 21.
Since the light beam is blocked and turned off, the passage of the substrate a is confirmed by the signal.

In the above embodiment, a case has been described in which the present invention is applied to a transport device that transports a printed circuit board, but the present invention can be applied to any transport device that transports thin plate-like objects with high thickness accuracy.

Also, a circular light shielding plate can be used, and a proximity sensor other than an optical sensor can also be used.

[Effect of idea]

As mentioned above, the present invention uses a detection means to detect the operation of the stopper pin that stops the conveyed object.
Stopping of conveyance by stopper pin and its arrival,
The stop signals are generated synchronously, and there is no mismatch unlike in the prior art.

When the conveyed object moves backward, even if it is only slightly, the stopper pin moves accordingly, and this is detected by the detection means. This prevents work errors in which work is performed with the relative position of the work equipment and the conveyed object out of alignment. be done.

Moreover, unlike conventional methods, where separate arrival and passage detections are performed using sensors at different locations, both sensors can be detected by the operation of a stopper pin, eliminating time lag and making it easier to adjust the timer on site. First, it can be adjusted in advance regardless of the installation location of the conveyor, etc., and productivity can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention in a stopped state. Figure 1 is a side view, Figure 2 is a front view, and Figure 3 is an opposite side view, and the dashed line indicates a standby state. , two-dot chain lines indicate the passing state, FIGS. 4 and 5 are a plan view and a sectional view showing a stopper and a sensor of a conventional conveying device, and FIG. 6 is an enlarged view of the sensor. a... Board, 11... Stopper pin, 12...
...Spindle, 13...Coil spring, 14...Pin, 1
5... Solenoid, 16... Pin, 17... Rotating arm, 18... Arm rod, 19... Light shielding plate, 20, 21
...Sensor.

Claims (1)

[Scope of claim for utility model registration] A stopper pin that is rotated by a carrier such as a board, a rotating arm that rotates in conjunction with the stopper pin, and a stopper that stops the rotating arm in the middle of rotation. A sensor that also serves as a stopper for a conveying device, comprising: a release means for releasing the stoppage of the rotary arm by the stopper; and a detection means for detecting stoppage of the rotary arm by the stopper.