JPS5835420A - Electrostatic capacity type liquid level gauge - Google Patents

Abstract

PURPOSE:To facilitate the assembling work and to make it possible to conduct mass production, by mounting a spacer arranging structure to electrode plates, thereafter drawing joints, thereby leaving only spacers at specified positions and forming an electrode. CONSTITUTION:The spacer arranging structure 21 is formed by spacers 17, which are arranged at the specified positions so as to match the holes perforated in the electrode plates 12a and 12b, and at least one joint 22, which connects neighboring spacers 17 so as not to collapse said positional relationship, as a unitary body. The part between each spacer and the joint is connected by a separating part 22a which can be cut off. The spacer arranging structure 21 is held between the elecdrode plates 12a and 12b so that respective hole positions are aligned. A collar 18 with a flange is inserted in each matched holes and caulked, thereby the structure body is obtained. When holding parts 23 of the arranging structure 21 are grasped and drawn out, the spacers 17 remain at the specified positions and only the joints 22 are removed. Thus the assembling of the electrode 12 is completed. In this way, the assembling work is facilitated, and the mass production is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION According to the invention, a predetermined voltage I! can be applied to any location C:' of the electrode formed by facing the electrode plates. This meter maintains the distance between the plates and improves the accuracy of each liquid amount, and is related to black capacitance 1g1w meter r-.

As shown in FIGS. 1 to 3, for example, a capacitance needle in which a predetermined distance between the electrode plates is secured at any location C of the two electrodes is as shown in FIGS. Fuel tank C: There is one that has been applied. This capacitive layer liquid meter 10 includes a plurality of sets of parallel plane electrodes 1! with electrode plates 12a, Hlb, 13a, Hlb facing each other at equal intervals. , 13, and is immersed in the fuel IS in fuel tank No. 1 to measure the liquid level t or the amount of liquid in fuel tank 14.

This is because the change in capacitance that occurs between the electrodes 13 and 13; the change in the amount of intervening fuel 15, that is, the change in the immersed surface area, is emitted as a change in frequency from the processing circuit 16 (2), and this oscillation pulse The amount of liquid is determined from the frequency of Measurement cannot be performed.This interval is the electrode crane.

13.Response that maintains accurate dimensions at any position;
They are connected via a large number of spacers 17. The structure of each spacer 17 is as shown in Figure 3: C: Electrode plate 12m
, 12b are aligned with the holes of the spacer 17, and an insulating collar 18 is inserted from one side, and a rivet 19 is inserted and caulked. Work such as 1: across the entire surface 12 m of electrode plates, 1! 1: They were spaced apart at equal intervals in an insulated state. In addition, the phrase is electrode 1! , 13.

However, such work is complicated and requires a lot of man-hours.
! B, 13m, and 131b holes one by one (it took two hours and was not suitable for this purpose).

Therefore, in this invention, a plurality of spacers arranged at the predetermined mounting position C of the electrode plate are connected to each other via a divided part with at least one joint that is continuous and thinner than the spacer T. After attaching the spacer arrangement structure to the electrode plate, when the joint is pulled out, the divided part is cut by 62, leaving only the spacer at a predetermined position to form the electrode, making the assembly work easier. The purpose of this invention is to provide a needle with a capacitance of ms that can be adjusted.

Hereinafter, this invention will be explained based on the section (:).

4'g to 8 are views showing an embodiment of the present invention.

FIG. 4 shows a part of the electrode n, which is a main part of the capacitance type liquid meter of the present invention, and is in the process of being manufactured. In Figure C, the electrode plate is the electrode plate 12&.

Figure 6C between 12b; Spacer arrangement structure 21 as shown
Clamp and rivet) 19 or screw etc. C; to secure it.

The spacer arrangement structure 21 is shown in FIG. It is made by integrally molding at least one joint catfish that connects the spacers 17 to each other so as not to disrupt this positional relationship.A thin wall (: formed and cuttable Separated parts!! They are connected by snow a.

In FIG. 6, the joint n sequentially connects the spaces t17 arranged in two upper and lower rows in a staggered manner, and at the position where it is connected to the spacer 17, it forms a partially thick shape on the outer periphery of the spacer 17. It is connected.

Similarly, the spacers 17 in the C2 order row are also connected to the previous row of spacers 11 by staggered joints n. Therefore, as a whole, the spacer 17 forms a spacer arrangement structure n in which predetermined arrangement positions are provided. In addition, joint n
Each terminal C; is 11 (; electrode plate 12a) when the gripping part n for pulling out is assembled to the electrode 12.

ζ is provided so as to protrude from the outside of 12b. Of course, three or more gripping portions 4 may be connected in a bundle.

The shape of the dividing portion 22m is shown in FIGS. 7 and 8g; details are shown in FIG. Teru. The thickness i1D of the spacer 17 is
The thickness of the joint n is made thinner than the thickness D of the Ht spacer 17.

Furthermore, the joint n is made so that a gap remains on both sides even when the electrode 1 is sandwiched between the electrodes 12m and 12b. ).

9 and 10 are diagrams showing other examples of the divided portion 32b of the spacer arrangement structure.7, The spacer 17 pipe joint n is staggered 1; The difference is that the connecting part with 17 is the apex of the folded part of the joint n, and the connecting part 11622b with the spacer 17 is connected to the spacer 17 at the dividing part 11622b, which is a point-like thin part.

Further, the spacer arrangement structure 21 is entirely made of an insulating material since the spacer 17 is required to be an insulator. For C in the fuel tank of automobiles, when used, thermoplastic resins such as boria tar, high polyethylene, etc., which are resistant to petroleum and alcohol, or thermosetting resins such as phenol resins and epoxy resins are suitable. It is.

To explain how to assemble electrode 13, electrode II 12&, l
Between lb and ζ;
Put the two together, insert the flange collar 18 made of csas material into each hole, and then insert the flange collar 1
Pass the rivet 1st through the hole No. 8 and caulk it to form the structure C shown in FIGS. When you pull it out,
Lipet) Electrode 1 at 1G [11a, 1lbr - Fixed sube? 17 is the electrode 1 [1! The predetermined positions of a and llb remain, and only the -hand n is completely removed, completing the assembly of the electrode.

Place the electrode in the mouth container as shown in Figure 1 (;
Therefore, this is a capacitance drench meter.

As explained above, according to v4 of H, the capacitance lid liquid meter is a general capacitance lid liquid meter that uses electrodes that are assembled using a spacer arrangement structure that maintains the spacer in a predetermined positional relationship C; Since the parallelism of the electrodes can be obtained at any position, it is possible to obtain an accurate C. can.

[Brief explanation of the drawing]

Figure 1 is a central sectional view of a fuel tank for a motor vehicle equipped with a conventional capacitance type liquid meter, Figure 3 is line 1C; a perspective view of the electrode used, Figure 8 is line 8. Figures 4 to 10 are cross-sectional views of the figure, Figures 4 to 10 are examples of the present invention, Figure 4 is a partial plan view showing the electrode in progress, and Figure S is the v-vwii diagram of Figure 4. , Fig. 6 is a partial plan view of the spacer arrangement structure, Fig. 7 is a partially enlarged view of the spacer arrangement structure showing the divided part, Fig. 8 is a cross-sectional view of Fig. 7, and Fig. 9 is a partial plan view of the spacer arrangement structure. A partially enlarged view of the spacer arrangement structure showing another divided part, FIG. 10 is an x-
It is an x sectional view. U... Electrode, 12m, 12b, 13m, 13b ・
``Electrode plate, 17--Spacer, 21--Spacer arrangement structure, 2F...Joint, 22m, 22b--...Divided part. Applicant: Nissan Motor Co., Ltd.?81 Figure 1^ Sugar 20 Liu 3 Figure Liu 4 Figure? 15 Figure 6 Figure 17 Figure V■ vSB Figure vJ10 mouth

Claims (1)

[Claims] A capacitance IGTW quantity meter C that detects the amount of liquid in a container from the capacitance between the electric current I11 and the capacitance that changes depending on the immersion ratio of the liquid;
Then, the predetermined mounting position C between the electrode plates; a plurality of spacers that are electrically distributed together, and at least one joint that is thinner and continuous than the wrinkled spacer and that is connected to the spacer narrower. , a spacer arrangement structure consisting of a joint and a divided portion formed between each of the spacers.
[After attaching r-, by pulling out the hand, the dividing portion is cut off, leaving only the spacer at the predetermined position r-, and a capacitance IIIl is defined as **.
Quantity needle.