JPH04113047U - Leakage sensor assembly - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an assembly of a sheet-like liquid leakage sensor that can be cut to any desired length and width and has an assembly structure that is easy to assemble. [Structure] Pressure contact terminals 32 of a pressure contact type connector 3 are brought into contact with a plurality of electrode wires 23 of a liquid leakage sensor 2, which are held in a parallel and spaced relation by a sheet-like insulator 22 and constitute a plurality of pairs of electrodes. The rear end portions of the pressure contact terminals 32 are arranged alternately on two opposing sides of the housing opening 33 to form two sets of terminal rows 34.
is formed. Then, by fitting the plug 4 provided with the pair of terminals 42 into the housing opening 33, the plurality of pairs of electrodes are connected at once.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an assembly structure of a liquid leakage sensor formed in a sheet shape.

0002

[Conventional technology]

In recent years, sheet-like insulators are used to hold paired electrode wires apart, and the voltage between these electrode wires has been increased. Liquid leak sensors that detect liquid leaks by measuring changes in air resistance are, for example, It can be installed on the floor of a computer room to detect water leaks, or on pipeline flanges. It is used to detect liquid leakage from the flange by wrapping it around the flange. There is. Conventionally, this type of liquid leakage sensor detects a relatively wide area, so for example For example, it is disclosed in Utility Model Application No. 60-154851, Utility Model Application No. 2-105140, etc. In this way, a pair of comb-shaped electrode wires are arranged facing each other with a narrow interval on a sheet-like insulator. , or multiple arrays arranged in a parallel spaced relationship as in Utility Model Application Publication No. 1-59841. A structure in which a lead wire is connected to each of the pair of electrode wires, and these lead wires are combined into two sets. It is constructed. In such a leakage sensor, each electrode wire of the lead wire is The connection is made by soldering, and the connection part is made of epoxy resin. A field is applied.

0003

[Problem that the idea aims to solve]

By the way, a pair of comb-shaped electrode wires are arranged facing each other at narrow intervals on a sheet-like insulator. The former type of liquid leakage sensor has few lead wire connections, but it can be cut according to the installation location. The disadvantage is that it cannot be used in isolation. Also, separate multiple pairs of electrode wires. The latter type of leakage sensor, which is arranged in parallel with the Although there are some points, the disadvantage is that there are many connection points. In addition, any liquid leakage sensor However, the above-mentioned assembly work is required during installation, and the problem is that workability is poor. was there.

0004 Therefore, in view of these problems of the conventional technology, this invention was developed to cut the material to any length. An assembly of sheet-like liquid leakage sensors that can be used to improve workability. The purpose is to provide an assembly structure that is easy to use.

[0005]

[Means to solve the problem]

In order to achieve the above object, the leakage sensor assembly according to this invention is Multiple electrode wires arranged side by side with row spacing are held by a sheet-like insulator, and the electrodes are A liquid leakage sensor that detects leakage that has adhered across lines based on changes in electrical resistance. Then, multiple pressure contact terminals individually contact each electrode wire of this leakage sensor on the tip side. , the rear end side portions are arranged alternately on two opposing sides in the housing opening, and two sets of A pressure contact type connector that forms a row of pressure contact terminals, and a connector that is fitted into the opening of this pressure contact type connector. Equipped with a plug that electrically connects each of the pressure welding terminal rows at once through a pair of terminals. composition.

[0006]

[Effect]

In this idea, the pressure contact type connector is used for connecting printed circuit boards and flat cables, for example. You can use off-the-shelf connectors prepared for the purpose of connecting to Wear. In this type of connector, the tip of the terminal penetrates the insulator and contacts the conductor. It is formed into a roughly U-shape, and the rear end is a housing opening for inserting a board. The structure is located within the department. Then, use this pressure contact type connector as a leakage sensor. When installed, the leakage sensor, which is held in a parallel and spaced relationship by a sheet-like insulator, A pressure contact type connector that is connected to multiple electrode wires in a row at the same pitch in the housing. A plurality of insulation displacement terminals penetrate the sheet-like insulator and individually come into contact with. In addition, the rear end portions of these pressure contact terminals are located opposite each other in the housing opening. The housing opening They are electrically connected together through a pair of terminals of a plug fitted inside.

[0007] In this way, the multiple electrode wires of the leakage sensor can be connected to two sets of pressure connectors. The electrodes are divided into two sets by alternately contacting the row of contact terminals, and substantially form a plurality of pairs of electrodes. These multiple pairs of electrodes are connected to a plastic plate with a pair of terminals that contact the insulation displacement terminal row. The electrodes are connected together and treated as a pair of electrodes. Therefore, for bulk connections In addition, traditional soldering and molding are no longer required, making assembly work easier. becomes extremely simple.

[0008]

【Example】

FIG. 1 is an exploded perspective view of a liquid leakage sensor assembly according to the present invention, and FIG. It is a front view. The illustrated liquid leakage sensor assembly 1 includes a liquid leakage sensor 2, a pressure contact type connector. 3, and a plug 4.

[0009] In the embodiment, the liquid leakage sensor 2 has a large number of liquid passage holes 21 arranged in a row on one side. A plurality of electrode wires 23 are held parallel and separated by the provided sheet-like insulator 22. Here, each electrode wire 23 is located under the row of liquid passage holes 21, and The structure is such that the electrode wires are bridged through the liquid passage hole 21. In addition, omissions in the example The liquid sensor 2 is made of a plastic film with many through holes and a plastic film without through holes. A plurality of electrode wires 23 are sandwiched between stick films, and these plastic films are It can be obtained by joining, but of course it is not limited to this. For example, a plurality of electrode wires 23 are arranged in a cross section on the surface of a sheet-like insulator. It is also possible to use one that is buried so that it is partially exposed.

0010 Next, the pressure contact type connector 3 consists of a housing 31 and a cover 35 that fits into the housing 31. For example, the type used to connect a flat cable to a printed circuit board. is preferably used.

[0011] Inside the housing 31, as shown in detail in FIG. 2 connects the approximately U-shaped tip portion to the same pin as the electrode wire 23 of the liquid leakage sensor 2. It is attached so as to protrude from the end surface on the opposite side of the opening 33 with a clip. Also, that The rear end portion of the plurality of pressure contact terminals 32 is a housing that receives a plug 4, which will be described later. Two sets of pressure-welded ends facing into the opening 33 of the Child rows 34, 34 are formed.

0012 Further, the cover 35 is attached to the housing 31 on the side of the protruding surface of the pressure contact terminal 32. It fits into the housing 31, and the end of the liquid leakage sensor 2 is held between them. ing.

[0013] The plug 4 is formed with a T-shaped cross section and is connected to the housing opening 3 of the pressure contact type connector. 3, both sides of the fitting part 41 are plated with gold or the like over the entire length in the width direction. Terminals 42, 42 are provided. Furthermore, these pair of terminals 42, 42, Lead wires 43, 43 are connected to each other, and these lead wires 43, 43 prevent fitting. It is housed in a groove formed in the base 44 and guided to the outside so that it does not become loose. .

[0014] Next, a method for assembling and using the liquid leakage sensor assembly 1 will be explained. . First, insert a liquid leakage cell into the recess of the cover 35 of the pressure welding connector with the liquid passage hole 21 facing upward. Place the sensor 2 on it, and place the housing 31 on it with the protruding surface of the pressure contact terminal 32 facing the housing 31. Fit it in. As a result, the tip of each pressure contact terminal 32 is shaped like a sheet of a liquid leakage sensor. It pierces through the insulator 22 and contacts each of the electrode wires 23. Here, each insulation displacement terminal The rear end portions of 32 are arranged alternately on two opposing sides within the housing opening 33, and two sets of Since the pressure contact terminal rows 34, 34 are formed, multiple liquid leakage sensors are connected in parallel. The electrode wires 23, 23, . . . are alternately distributed by the pressure contact terminals 32.

[0015] Then, when the fitting part 41 of the plug 4 is fitted into the housing opening 33, the plug A pair of terminals 42, 42 are connected to two sets of insulation displacement terminal rows 34, 42 of insulation displacement type connector, respectively. 34 and electrically connect them together. In this way, the leakage sensor can be Several electrode wires 23, 23... are alternately connected to two sets of pressure contact terminal rows of the pressure contact type connector. The two adjacent electrode wires 23, 23 form multiple pairs of electrodes. to be accomplished. These multiple pairs of electrodes are terminals of the plug that contact the insulation displacement terminal rows 34, 34. 42 and 42, respectively, and can be treated as a pair of electrodes. In addition, there is no need for traditional soldering or molding, making the assembly easier. Assembly work becomes extremely simple.

[0016] Furthermore, the liquid leakage sensor 2 used in this invention can be of any length or length depending on the installation location. It has the advantage of being able to be cut to width and used, and the pitch of the pressure contact terminals 32 is determined. Even when using off-the-shelf insulation displacement type connectors, all the insulation displacement terminals 32 must be There is no need to match multiple electrode wires of the leakage sensor 2, and the usage conditions of the leakage sensor 2 Depending on the situation, for example, the pitch of the electrode wires may be adjusted to every other insulation displacement terminal 32. The liquid leakage sensor 2 may be designed as follows. The pressure contact type connector 3 and the plug 4 are connected at both ends. For example, the leakage sensor assembly 1 attached to the It can be used by attaching it and connecting the other plug side to a detector.

[0017] Note that this invention is not limited to the above embodiments; for example, plugs and pressure welding It is not possible to make changes within the technical philosophy of this invention, such as changing the terminal shape of the type connector. Of course it is possible.

[0018]

[Effect of the idea]

As explained above, the leakage sensor assembly according to this invention can be The multiple pairs of electrode wires of the leakage sensor, which can be cut to different widths, are made into pressure-contact type. Since it has a configuration that connects all at once using a connector and plug, it is easier to assemble than conventional ones. A great practical effect is obtained in that the assembly work is simplified.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a liquid leakage sensor assembly according to the present invention.

FIG. 2 is a cross-sectional view of the leakage sensor assembly shown in FIG. 1;

[Explanation of symbols]

1 Leak sensor assembly 2 Leakage sensor 3 Pressure type connector 4 Plug 22 Sheet-shaped insulator 23 Electrode wire 32 Pressure contact terminal 33 Housing opening 35 Cover

Claims (1)

[Scope of utility model registration request] [Claim 1] A leakage device in which a plurality of electrode wires arranged parallel to each other in a spaced-apart relationship are held by a sheet-like insulator, and leakage liquid adhering between the electrode wires is detected based on a change in electrical resistance. A plurality of pressure contact terminals individually contact the liquid sensor and each electrode wire of the liquid leakage sensor at the tip side, and the rear end portions are arranged alternately on two opposing surfaces in the housing opening to form two sets of pressure contact terminal rows. A leakage sensor assembly comprising: a press-contact type connector; and a plug that is fitted into an opening of the press-contact type connector and electrically connects the press-contact terminal rows together, respectively, by means of a pair of terminals.