JPH0749021Y2 - Automatic stop device for diaphragm pump - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a diaphragm pump that stops the diaphragm pump when the movable member has an abnormal amplitude exceeding a predetermined value due to a broken diaphragm rubber or a failure of internal members. The present invention relates to an automatic stop device.

[Prior Art] Conventionally, as a device for automatically stopping the diaphragm pump when the mover of the diaphragm pump has an abnormal amplitude, there are devices shown in Fig. 8 and Fig. 9.

In the structure shown in FIG. 8, a pin b is bridged between opposed holding parts a, and one holding part a has a fixed contact c and a fixed contact c.
There is provided a movable contact spring d which elastically contacts with, and the movable contact spring d is pushed by the bridging of the pin b to be pressed against the fixed contact c. When the amplitude of the mover 5'becomes abnormal, the pin b is broken by the projection 6'of the mover 5 ', and the movable contact spring d is no longer pressed so that electricity does not flow.

As shown in FIG. 9, the conductive portions 2'on the front and back of the printed circuit board 1'are made conductive at the ends of the printed circuit board 1 ', and a narrow folding part 3'is provided in front of the end of the printed circuit board 1'. The end of the power cord 4'is connected to the conductive portion 2'by screwing, and the printed board 1'is attached to the base f. When the amplitude of the mover 5'becomes abnormal, the mover 5 '
The end portion of the printed circuit board 1'is bent at the cut-off portion 3'at the protrusion 6'to prevent electricity from flowing.

[Problems to be Solved by the Invention] However, in the case of the conventional example shown in FIG.
There is a problem that the contact between the fixed contact c and the fixed contact c is likely to be defective due to corrosion or insufficient pressure. Further, in the case of the conventional example shown in FIG. 9, there is a problem that it takes time to attach and detach the printed circuit board 1'when it is replaced with a new printed circuit board 1'after being automatically stopped.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to have a highly reliable automatic stop device for a diaphragm pump that is easy to attach and detach when replacing parts after automatic stop. To provide.

[Means for Solving the Problems] In order to achieve the above object, the automatic stop device of the diaphragm pump of the present invention is configured such that the lead wires 7 are connected to the conductive portions 2 on both sides of the printed circuit board 1 by soldering. The front and back conductive parts 2 are connected by the tip portion 1a, a narrow folding portion 3 is provided in front of the tip portion 1a, and the printed circuit board 1 is inserted into a cylindrical holder 9 provided in the diaphragm pump casing 8. Then, when the tip end 1a of the printed circuit board 1 is projected into the casing 8 and the reciprocating movable element 5 of the diaphragm pump has an abnormal amplitude of a predetermined amplitude or more, the tip end part 1a of the printed circuit board 1 is cut off. The tip portion 1a of the printed circuit board 1 is positioned with respect to the mover 5 so that the printed wiring board 1 is bent so that the lead wire 7 and the power cord 4 connected to the printed circuit board 1 are connected to the cord connector 10. Connected.

Further, a bent portion 12 in which the insulated wire 11 is bent in a substantially U shape is inserted into a cylindrical holder 9 provided in the casing 8 of the diaphragm pump, and a tip portion 12a of the bent portion 12 is placed in the casing 8. The bending portion 1 is so arranged that the tip end 12a of the bending portion 12 is cut when the movable element 5 which is projected and reciprocates the diaphragm pump has an abnormal amplitude of a predetermined amplitude or more.
It is also preferable that the tip end portion 12a of 2 is positioned with respect to the mover 5 and the insulated wire 11 and the power cord 4 are connected by the cord connector 10.

[Operation] When the mover 5 has an abnormal amplitude, the tip of the printed circuit board 1
1a or the tip portion 12a of the bent portion 12 of the insulated wire 11 is cut and electricity stops flowing, so that the electric wire is automatically stopped. After the automatic stop, remove the printed circuit board 1 or the insulated wire 11 from the holder 9, insert the new printed circuit board 1 or the insulated wire 11 into the holder 9, and connect the power cord 4 and the lead wire 7 or the insulated wire 11 with the cord connector 10. Can be reset by connecting.

[Embodiment] FIG. 1 shows an example of the stopper device A, and the main body is formed of a printed circuit board 1 as shown in FIGS. 1 and 3. Conductive parts 2 are formed on the front and back surfaces of the printed circuit board 1 by etching a copper foil or the like. A through hole 14 is provided at the tip of the printed circuit board 1, and the conductive portions 2 on the front and back sides are electrically connected by the through hole 14. In front of the front end 1a of the printed circuit board 1, a narrow folding part 3 is formed.
Is provided on both sides of the base end of the printed circuit board 1.
15 are projected. One end of a lead wire 7 is connected to the conductive parts 2 on the front and back of the printed circuit board 1 by soldering 16, and a cord connector 10 is provided at the other end of the lead wire 7. The outer surface of the portion to which the lead wire 7 is connected by soldering 16 is covered with a heat-shrinkable tube 28 as necessary, and the outer surface of the remaining conductive portion 2 is also protected as necessary. Compression chambers 17 are provided on the left and right inside the casing 8 of the diaphragm pump. When the mover 5 reciprocates left and right, the diaphragm rubbers 18 in the left and right compression chambers 17 vibrate and discharge compressed air. ing. The mover 5 reciprocates by energizing the electromagnetic coil 29. An opening 19 is provided in the casing 8, and a cylindrical holder 9 is attached to the opening 19. As shown in FIG. 4, this cylindrical holder 9 has a male screw portion 20 on the outer periphery, and
It is attached by screwing 20 into the opening 19. The lower part 21 of the holder 9 is provided at the lower end of the holder 9.
An upper step portion 27 is provided on the upper part of the holder, and a lead wire outlet 22 is provided on the upper side of the holder 9.
A female screw portion 23 is provided on the inner circumference of the upper part of the. This internal thread
A lid 24 as shown in FIG. 5 can be screwed onto 23. A male screw portion 25 is provided on the outer periphery of the lid body 24,
A concave groove 26 for operation is provided on the upper surface of the lid body 24. The printed circuit board 1 of the stopper device A is inserted into the holder 9, and the tip portion 1a and the cut-off portion 3 of the printed circuit board 1 are projected into the casing 8. The lead wire 7 led out from the printed circuit board 1 is inserted into the lead wire outlet 22 and a lid 24 is attached to the upper end of the holder 9. Lead wire 7
And the power cord 4 are connected by a cord connector 10, and each wire of the power cord 4 is connected to the electromagnetic coil 29. The mover 5 is provided with a pair of protrusions 6 that come into contact with the tip 1a of the printed board 1 when the mover 5 has an abnormal amplitude larger than a predetermined amplitude. However, when the diaphragm pump is driven and the movable element 5 has an abnormal amplitude larger than a predetermined amplitude due to breakage of the diaphragm rubber or failure of internal members, the protrusion 6 of the movable element 5 hits the tip 1a of the printed circuit board 1. The tip portion 1a is cut by breaking at the folding section 3, whereby the energization is cut off and the diaphragm pump automatically stops. When resetting after removing the harmful effect after the automatic stop, the lid 24 is removed, the power cord 4 and the lead wire 7 are disconnected from the cord connector 10, and the printed board 1 of the stopper device A is removed from the holder 9 to replace the new one. The printed board 1 of the stopper device A is inserted, the lead wire 7 and the power cord 4 are connected by the cord connector 10, and the lid 24 is attached.

6 and 7 show another embodiment. In the case of this embodiment, the stopper device A is formed of an insulated wire 11, a bent portion 12 is provided in the insulated wire 11 in a substantially U-shaped bend, and a cord connector 10 is provided at an end of the insulated wire 11. . The bent portion 12 of the insulated wire 11 of the stopper device A is inserted into the holder 9 mounted on the casing 8, and the tip portion 12a of the bent portion 12 is projected into the casing 8. When the mover 5 vibrates abnormally, the protrusion 6 of the mover 5 causes the tip 12 of the bent portion 12 to move.
When a is cut off, the power is cut off and it automatically stops. After the automatic stop, the abnormality is removed, the insulated wire 11 of the stopper device A is pulled out, a new insulated wire 11 is inserted into the holder 9, and the insulated wire 11 and the power cord 4 are connected by the cord connector 10.

[Advantages of the Invention] Since the present invention is configured as described above, when the mover has an abnormal amplitude, the tip of the printed circuit board is cut off at the breaker at the mover, so that no current flows and the device automatically stops. When there is no abnormality, it has continuity through the power cord, cord connector, lead wire, soldering part and conductive part, and there is no contact part as in the past, and the connection is highly reliable. Also, when resetting after automatic stop, all you have to do is remove the printed circuit board from the holder, insert a new printed circuit board, and connect the lead wire and power cord with the cord connector. It is possible to eliminate connection mistakes.

Further, in the invention according to claim 2 of the present invention, when the mover has an abnormal amplitude, the bent portion of the insulated wire is cut off to stop the electricity from being automatically stopped. When it is not, it is energized through the power cord and the insulated wire and there is no contact part as in the past, so the connection is highly reliable.In addition, when resetting after automatic stop, the insulated wire is pulled out from the holder and a new insulation All you have to do is insert the wire into the holder and connect the insulated wire and the power cord with the cord connector, and it will be easy to reset and eliminate connection mistakes. Since it is only bent into a substantially U shape, the structure is simple and it can be provided at low cost.

[Brief description of drawings]

1 (a) and (b) are a front view and a side view of a stopper device according to an embodiment of the present invention, FIG. 2 is a sectional view showing the whole of the same, and FIGS. 3 (a) and (b) are the same. The top view and front view which show the detailed structure of the printed circuit board of a stopper device, FIG.4 (a) (b) (c) is the top view of the holder same as the above, front sectional drawing and partially cutaway side view, FIG.5 ( a) and (b) are a plan view and a front view of the same lid, FIG. 6 is a sectional view of a stopper device of another embodiment of the same, FIG. 7 is an overall sectional view of the same, and FIG. ) Is a perspective view of one conventional example, FIG. 8 (b) is a cross-sectional view of the main part of FIG. 8 (a), and FIG. 9 is a perspective view of another conventional example, in which 1 is a printed circuit board, 1a Is a tip part, 2 is a conductive part, 3 is a cut-off part, 5 is a mover, 7 is a lead wire, 8
Is a casing, 9 is a holder, 10 is a cord connector,
Reference numeral 11 is an insulated wire, 12 is a bent portion, and 12a is a tip portion.

Claims (2)

[Scope of utility model registration request] 1. A lead wire is connected to each of the conductive parts on both sides of the printed circuit board by soldering, the conductive parts on the front and back sides are connected to each other at the front end of the printed circuit board, and a narrow cut portion is provided in front of the front end. The printed circuit board is inserted into the cylindrical holder provided in the casing of the diaphragm pump, the tip of the printed circuit board is projected into the casing, and the reciprocating mover of the diaphragm pump has an abnormal amplitude above a predetermined amplitude. Position the tip of the printed circuit board with respect to the mover so that the tip of the printed circuit board is bent at the cut-off part, and connect the lead wire and power cord connected to the printed circuit board to the cord connector. Diaphragm pump automatic stop device connected by. 2. A bent portion formed by bending an insulated wire into a substantially U shape is inserted into a cylindrical holder provided in a casing of a diaphragm pump so that a tip portion of the bent portion projects into the casing. Position the tip of the bending part relative to the mover so that the tip of the bending part is cut off when the reciprocating mover of the diaphragm pump has an abnormal amplitude above a predetermined amplitude. , Automatic stop device for diaphragm pump, which consists of connecting insulated wire and power cord with cord connector.