JPH064280Y2 - Electrode level detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electrode type level detecting device for detecting the level of liquid or powder stored in a container by means of electrodes.

(B) Conventional Technology As a conventional technology, for example, in Japanese Utility Model Publication No. 55-44181, a large-diameter hole portion which communicates with a through hole in a body formed of an insulating material and is larger than the outer diameter of the coupling of the electrode rod. And the upper part of the electrode rod is inserted into the through hole, the upper end of the electrode rod is screwed onto the mounting nut to be loaded on the through hole of the body, and the terminal screw part is provided on the mounting nut. An electrode holder is disclosed in which the upper end of an electrode rod through which a hole can be inserted is screwed into a mounting nut from below and is tightened and fixed by a tightening screw.

(C) Problems to be solved by the device According to such a conventional structure, the lead wire is connected to the mounting nut by the terminal screw portion and electrically connected to the electrode rod through the nut, so that To release the electrical connection with the lead wire, it is necessary to remove the terminal screw portion or loosen the tightening screw and then release the screwing with the mounting nut.

In view of the above-mentioned problems, the present invention provides an electrode type level detecting device that can easily electrically connect and disconnect a lead wire and an electrode rod.

(D) Means for Solving the Problems In order to solve the problems of the above-mentioned prior art, the present invention inserts and fits into the edge of the notch formed by opening upward in the upper side surface of the container. An electrode fixture made of an insulating material having a groove,
An electrode rod integrated with the fixture and having a plug portion projecting from the back surface of the fixture in the horizontal direction, a housing made of an insulating material having an insertion passage corresponding to each plug, and a contact surface with the plug on the front surface are provided. In addition, it has a lead wire connected to the rear portion, is slidably disposed in the insertion passage of the housing, and is constantly urged in the direction opposite to the insertion direction of the plug portion by the spring action. The electrode type level detecting device is provided with an electrode receiver of a conductor that retreats against a spring force due to contact of a plug inserted in an insertion passage, and the electrode rod and the electrode receiver are separable.

(E) Action In the present invention, the plug part (5B) is inserted into the insertion passage (1
By being inserted into the insertion passage (10), it comes into contact with the electrode receiver (8) slidably arranged in the insertion passage (10) and is electrically coupled to the lead wire (12).

Moreover, the electrode receiver (8) has a plug portion due to the action of the spring (9).
Since the plug (5B) is pressed, the contact between the plug portion (5B) and the electrode receiver (8) becomes reliable.

In addition, when disconnecting the electrical connection between the electrode rod (5) and the lead wire (12), the container (1) to which the electrode rod (5) is attached via the electrode fixing tool (4) is in front. It is done by pulling.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings. (1) is a container for accumulating an object to be detected such as liquid or powder, and concave notches (2) are formed at the upper edges of the side walls of the container (1) with an open upper surface facing each other. is doing. The electrode type level detecting device of the present invention comprises two separable structural parts.

One of them is an insulating material such as rubber that has grooves (3) that fit under the notch (2) and on both side edges (2A) formed on the lower surface and both side surfaces corresponding to the edge (2A). Produced electrode fixture (4)
And at least 2 pre-integrated with the fixture (4)
It is an electrode rod (5) of a book. The electrode rod (5) has a sensor part (5A) of different lengths extending from the front surface of the fixture (4) to the bottom along the side wall of the container (1), and a horizontal direction from the back face of the fixture (4). It has a convex hemispherical plug portion (5B) protruding from the rear end.

Other components are fixing member (6), housing of insulating material
(7), a conductor electrode receiver (8) and a biasing spring (9). The housing (7) has two insertion passages corresponding to the plug part (5B).
(10), the front part of the passage (10) is formed as a guide part (10A) having a wide opening and being inclined inward. Also, the passage
A bearing (11) is screwed on the rear of the (10).
1) is the electrode receiver (8) slidably arranged in the passage (10)
The shaft (8A) that forms a part of is slidably supported. The electrode receiver (8) has a concave hemispherical front face receiving part (8B) that contacts the plug part (5B), and connects the lead wire (12) to the shaft (8A) protruding from the bearing (11). That is, the round terminal (13) to which the lead wire (12) is connected is inserted into the shaft (8A) and fastened with the bolt (14). Further, between the electrode receiver (8) and the bearing (11),
The coil-shaped urging spring (9) is arranged so as to surround the shaft (8A), and the spring (9) always urges the electrode receiver (8) in the direction opposite to the inserting direction of the plug part (5B). ing. That is, the electrode receiver (8) is pressed against the step (7A) formed in the housing (7) so as to face the passage (10). Further, through holes (15) are formed at four corners of the housing (7). Next, the front fixing member (6) has a box shape with the front opening, and the opening flange (6A)
have.

Then, the through hole (15) formed in the housing (7) is loosely inserted into the opening flange (6A) of the fixing member (6) and the screw (16) is screwed. At this time, the fastening position of the screw (16) is limited by the spacer (17) surrounding the screw (16). A coil spring (18) is arranged between the housing (7) and the opening flange (6A) so as to surround the spacer (17).
Is a washer (9) with housing (7) fitted into screw (16)
It is urged to the front position which is restricted by.

In the use of the electrode type level detecting device configured as described above, first, the groove (3) formed in the fixture (4) is inserted and fitted into the cutout edge portion (2A) to fit the electrode rod (5). To the container (1) side. On the other hand, the fixing member (6) is fixed to, for example, the wall surface (20), and in this case, the insertion passageway (10) of the housing (7) has the plug portion (5B).
Consider the mounting position so that it faces.

Then, push the container (1) and insert the plug part (5B) into the housing.
By being inserted into the insertion passageway (10) formed in (7), the plug part (5B) contacts the receiving part (8B) of the electrode receiver (8) and is electrically coupled to the lead wire (12). . The plug part (5B) is the receiving part
After contacting (8B), in order to slide the electrode receiver (8) backwards against the biasing spring (9), the biasing spring (9) is pushed from the electrode receiver (8) to the plug part (5B). The pressing force is urged by the action of), and the contact between the plug portion (5B) and the electrode receiver (8) is further ensured.

By the way, when the plug portion (5B) and the insertion passageway (10) are slightly misaligned due to dimensional error, mounting error, etc., the housing (7) has a degree of freedom in all directions. When (5B) contacts the guide part (10A), the housing (7) moves and the plug part (5B) is inserted into the insertion passage.
Guide it to (10) and bring the plug part (5B) into contact with the receiving part (8B).

Further, the electrical connection between the electrode rod (5) and the lead wire (12) can be easily released by pulling the container (1) toward you, and the fixture (4) from the container (1). The electrode rod (5) can also be easily removed from the container (1) by pulling it out.

In the embodiment of the present invention described above, the housing (7) is movably attached to the box-shaped fixing member (6), but if the wall surface (20) is considered as the fixing member, the screw (16) is attached. Wall (20)
It may be attached directly to.

(G) Effect of the Invention As described above, the present invention inserts the plug portion of the electrode rod into the insertion passage formed in the housing, and brings the plug portion into contact with the receiving portion of the electrode receiver, thereby the electrode rod and the lead wire. Can be electrically coupled to each other, and in this case, the contact between the plug portion and the receiving portion of the electrode receiver can be reliably held by the action of the biasing spring.

Also, when disconnecting the electrical connection between the electrode rod and the lead wire, it can be achieved by pulling the container forward without removing the lead wire, and the electrode rod can be easily removed from the container together with the electrode fixture. You can

[Brief description of drawings]

FIG. 1 shows an electrode type level detecting device of the present invention. FIG. 1 is a sectional view showing an electrically connected state of an electrode rod and a lead wire, and FIG. 2 is a sectional view showing a released state of the electric connection. Three
FIG. 4 is an enlarged view of a part of the configuration of FIG. 1, and FIG. 4 is AA of FIG.
Sectional view, FIG. 5 is a perspective view showing the relationship between the container and the electrode rod,
FIG. 6 is a perspective view showing the relationship between the electrode rod and the housing. (1) …… Container, (5) …… Electrode rod, (8) …… Electrode receiver.

Claims (1)

[Scope of utility model registration request] 1. An electrode fixing member made of an insulating material having a groove to be inserted and fitted at an edge portion of a notch formed by opening upward on a side surface of a container, and a plug portion integrated with the fixing member. An electrode rod horizontally projected from the rear surface of the fixture, a housing made of an insulating material having an insertion passage corresponding to each plug portion, a contact surface with the plug portion on the front surface, and a lead wire on the rear portion are provided. The plug portion inserted into the insertion passage is connected to the housing, is slidably disposed in the insertion passage of the housing, and is constantly urged by a spring action in a direction opposite to the insertion direction of the plug portion. An electrode type level detecting device comprising: a conductor electrode receiving member that retreats against a spring force due to contact with each other, and the electrode rod and the electrode receiving member are separable from each other.