JPH04366732A - Electrode holder - Google Patents

Abstract

PURPOSE:To enhance freedom of the installation position of a receiving body with respect to a main body, that is, the pulling-out direction of each lead wire by providing screw installation holes and screw holes in such a way that the main body can be threadedly engaged with the receiving body at the installation positions in four ways. CONSTITUTION:Electrode bars 21 through 25 are fitted onto the lower surface of a main body 3 to detect whether or not the fluid surface is in a specified range, and terminals 81 through 85 for the electrode bars 21 through 25 are pressed in the upper surface of the main body. Each terminal 81 through 85 is in a hexagonal column shape, and each screw hole 10 is formed at one side end of each terminal wherein each screw hole is threadedly engaged with each terminal screw 9 which is turned out to be a connecting section, and each screw hole on which each end of the electrode bars 21 through 25 is fitted, is formed at the other end side. In addition, the main body includes cylindrical sections 111 through 115 to which the terminals 81 through 85 are pressed in, and the cylindrical section 111 is formed at the center section of the main body, and the cylindrical sections 112 through 115 are formed along the circumference of the main body at equal intervals. This constitution thereby enables the main body 3 to be installed onto the receiving body at the positions in four ways.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode holder applied to liquid level detection devices and the like.

0002

2. Description of the Related Art FIG. 10 is a perspective view of a conventional electrode holder 51. In the figure, 40 is a receiver, 41 is a main body, and 42 is a cover. This electrode holder 51 is installed as follows. That is, the receiver 40 having the threaded portion 43 is screwed and attached to an installation location such as a tank. Next, an electrode rod 44 is attached to the main body 41, and an electric wire 46 passing through a rubber bush 45 is connected to each terminal 47.
It is attached by tightening two screws 48 to the
The cover 42 is attached with the rubber bush 45 sandwiched therebetween.

0003

[Problems to be Solved by the Invention] In such a conventional electrode holder 51, the screw holes 49 formed at two locations on the periphery of the receiving body 40 are connected to the threaded holes 49 formed at two locations on the periphery of the main body 41. The main body 41 is attached to the receiving body 40 by aligning the mounting holes 50 and fixing with screws, but in this case, the main body 41 can only be mounted in two mounting positions rotated by 180 degrees with respect to the receiving body 40. cannot be installed,
Therefore, there is a problem that the direction in which the electric wire 46 is drawn out is also limited to two directions.

The present invention has been made in view of the above points, and aims to facilitate wiring work by increasing the degree of freedom in the mounting position of the main body with respect to the receiver, and therefore in the direction in which the wires are drawn out. purpose.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is constructed as follows.

That is, the electrode holder of the present invention includes a main body on which the electrode rod is suspended from the lower surface and a terminal for the electrode rod on the upper surface, and a receiver to which the main body is fixed with screws. A screw mounting hole and a threaded hole are formed in the main body and the receiver, respectively, so that the main body can be fixed to the receiver with screws in at least four different mounting positions.

[0007]

[Operation] According to the above structure, the main body can be attached to the receiver in at least four different attachment positions, and the electric wire can be drawn out from at least four directions.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of one embodiment of the present invention, and FIG. 2 is a sectional view of the assembled state. In this FIG. 2, the electric wire is not shown, and only the central electrode rod 21 is shown.

The electrode holder 1 of this embodiment has an electrode rod 21
- 25 hangs down, a receiver 4 to which the main body 3 is attached, a drip-proof cover 5 attached to the main body 3, and a removably attached to the notch opening 6 of the main body 3. It basically consists of a nozzle-shaped electric wire drawing member 7.

The main body 3 has a plurality of (five in this embodiment) electrode rods 2 on its lower surface for detecting a predetermined range of the liquid level.
1 to 25 are attached, and each electrode rod 21 is attached to the top surface.
-25 five terminals 81-85 are provided by press-fitting. Each of the terminals 81 to 85 has a hexagonal column shape, and one end (upper end) thereof is formed with a screw hole 10 into which a terminal screw 9 serving as a wire connection portion is screwed, and the other end (lower end)
A screw hole 35 is formed on the side to which one end of each of the electrode rods 21 to 25 is attached.

The main body 3 has five cylindrical parts 111 to 115 into which the terminals 81 to 85 are press-fitted, respectively.
As shown in the plan view of FIG. 3, one cylindrical portion 11 is formed at the center, and four other cylindrical portions 112 to 115 are formed at equal intervals around the cylindrical portion 11. In addition, each cylindrical portion 11
1 to 115, as shown in the cross-sectional views of FIGS. 2 and 4, the portion into which the terminals 81 to 85 are press-fitted has a hexagonal column shape inside, and the lower portion thereof is a small diameter portion. On the side of this small diameter part, a storage part 12 is formed in which a nut 36 as a rectangular plate-shaped female screw member is stored, and an insertion hole 13 through which a screw 37 for fixing the electrode rod 2 is inserted. is formed.

This small diameter portion serves as a mounting hole for mounting the electrode rod 2 from the bottom side to each terminal 81 to 85 press-fitted into each of the cylindrical portions 111 to 115. As shown in FIG. 4, a penetrable separation membrane 14 is formed in the attachment hole.

The electrode holder 1 of this embodiment is commonly used for 4-pole and 5-pole, and when used as 4-pole, the terminal press-fitted into the cylindrical portion 111 at the center of the main body 3 is used. 81
Although the electrode rod 21 cannot be attached to the electrode rod 21, the separation membrane 14 is formed in the attachment hole of the electrode rod 21, so when used with 4 poles, the electrode rod 21 cannot be attached to the upper surface side of the main body 3 through the central attachment hole. No water or moisture can enter.

When used as a five-pole structure, the electrode rod 21 can be attached to the terminal 81 which is press-fitted into the central cylindrical portion 111 by easily penetrating the separation membrane 14.

Furthermore, in this embodiment, as shown in FIG. 4, the central cylindrical portion 111 of the five cylindrical portions 111 to 115 is more vertically oriented than the other four cylindrical portions 112 to 115. The position is lowered by a distance L corresponding to the connecting nut, so that these cylindrical parts 111 to 115
As for the terminals 81 to 85 that are press-fitted into the terminals 81 to 85, the end face of the central terminal 81 is vertically lowered by a distance L compared to the end faces of the other terminals 82 to 85. That is, the end surface of the center terminal 81 to which the ground electrode rod 21 is attached is lower than the end surfaces of the other terminals 82 to 85.

[0017] In this way, the central mounting part to which the grounding electrode rod 21 is attached is positioned vertically lower than the mounting parts to which the other electrode rods 22 to 25 are attached by a distance L corresponding to the connection nut. Therefore, when connecting standard length electrode rods with connecting nuts and using them as long electrode rods, the position of the connecting nut of the earth electrode rod 21 and the connecting nut positions of the other electrode rods 22 to 25 are different. Since the connection nuts are shifted in the vertical direction, the occurrence of electrical leakage due to water droplets is suppressed compared to when the connection nuts are close to each other.

The main body 3 also has a peripheral wall 15 along the circular outer periphery, and the peripheral wall 15 is formed with a cutout opening 6 for drawing out electric wires. A wire drawing member 7 is detachably attached to the edge. Furthermore, engagement holes 16 for attaching the cover 5 are formed at three locations on the peripheral wall 15.

Furthermore, in this embodiment, in order to allow the main body 3 to be attached to the receiver 4 in four different mounting positions, the peripheral edge of the main body 3 is provided with the following steps, as shown in FIG.
A penetrating mounting hole 17 for fixing the main body 3 to the receiving body 4 with screws is formed at a position where the peripheral edge is divided into two parts, and furthermore, a penetrating mounting hole 17 for fixing the main body 3 to the receiving body 4 with screws is formed on the lower surface side. As shown in the figure, engagement recesses 18 for positioning when attaching to the receiver 4 are formed at positions where the peripheral edge is divided into four equal parts.

On the other hand, the receiver 4 to which the main body 3 is attached has a threaded portion 19 for screwing and fixing it into an installation location such as a tank, and as shown in the plan view of FIG.
Screw holes 20 for fixing the main body 3 with screws are formed at positions where the peripheral portion is divided into four equal parts. Furthermore, screw hole 2
An engagement protrusion 21 for alignment is formed on the outer periphery of the main body 3 to engage with the engagement recess 18 of the main body 3 when the main body 3 is attached.

That is, when attaching the main body 3 to the receiving body 4, the engaging recesses 18 formed at four locations on the main body 3 are used.
By engaging the engagement convex portions 21 formed at four locations on the receiver 4, the two mounting holes 17 on the main body 3 can be connected to two of the four screw holes 20 on the receiver. screw hole 2
Align to 0 and secure with screws.

Therefore, according to this embodiment, the main body 3
It can be mounted in four different mounting positions, shifted by 90 degrees, with respect to the receiving body 4. This allows the wire to be drawn out from the notch opening 6 in any of the four directions, and the wiring Work becomes easier.

The cover 5 attached to the main body 3 has a peripheral wall 22 that fits over the peripheral edge 15 of the main body 3, and an opening 23 for drawing out electric wires is formed continuously in the peripheral wall 22. Furthermore, as shown in the horizontal cross-sectional view of FIG.
Engagement protrusions 26 that engage with the engagement holes 16 of the main body 3 are formed at three locations on the inner surface of the peripheral wall 22 of the cover 5 .

As shown in FIG. 2, the cover 5 of this embodiment has an inner surface 24 facing the upper surface of the main body 3 that is outwardly spherical, and an outer surface 25 that is also spherical. There is. As a result, the outer surface 25 drains water better, and condensation on the inner surface 24 is guided and discharged by the spherical surface, reducing the influence of condensation compared to the case where the inner surface 24 is a flat surface.

In this embodiment, the wire drawing member 7 detachably attached to the notch opening 6 of the main body 3 is shown in FIG.
As shown in the cross-sectional view, the engaging portion 2 through which the electric wire is inserted
7 and a nozzle part 28, the engaging part 27 has a collar part 38 that engages with the edge part of the peripheral wall 15 in which the notch opening 6 of the main body 3 is formed, and the nozzle part 28 has a It is shaped like a cone. As shown in the bottom view of FIG.
A cut groove 29 is formed so that the insertion path for the electric wire can be opened from the lower surface side. Furthermore, the nozzle section 28
A notch is provided on the outer peripheral surface of the wire as a mark 30 indicating the position where the wire should be cut according to the outer diameter size of the wire to be inserted.
It is formed in four places.

Since the wire drawing member 7 has a conical shape as described above, it is possible to effectively prevent external water from entering the inside of the main body 3 when the electrode holder 1 is assembled. Furthermore, since a mark 30 corresponding to the outer diameter size of the electric wire is formed on the outer periphery of the nozzle part 28, it can be easily cut at the position of the mark 30 corresponding to the outer diameter size of the electric wire. Become. Moreover, since the cut groove 29 is formed on the lower surface side, it is possible to open the cut groove 29 and attach the wire drawing member 7 even after wiring is completed.

The electrode rods 21 to 25 in the electrode holder 1 having the above structure are attached to the cylindrical portions 111 to 25 of the main body 3.
As shown in FIG. 2, the electrode rods 21 to 25 are screwed into the lower ends of the hexagonal columnar terminals 81 to 85 press-fitted into the terminals 115 through washers 31 and lock nuts 32.
The electrode rods 21 to 25 are fixed from the side surface of the electrode rod 2 by screws 37 via nuts 36. Therefore, the number of parts for attaching the electrode rod can be reduced.

In this embodiment, the mounting holes 17 are formed at two locations on the periphery of the main body 3, and the screw holes 20 are formed at 4 locations on the periphery of the receiver 4, but other embodiments of the present invention may be used. , the mounting holes 17 may be formed at four locations on the periphery of the main body 3 and the screw holes 20 may be formed at two locations on the periphery of the receiver 4, and the number of mounting holes 17 and screw holes 20 may be increased. Of course, you can.

[0029]

As described above, according to the present invention, the main body can be attached to the receiver in at least four mounting positions, so that the wires can be drawn out from the main body in at least one of the four directions. Wiring work can be done from any direction, making wiring work easier.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment of FIG. 1 in an assembled state;

FIG. 3 is a plan view of the main body.

FIG. 4 is a sectional view taken along the section line A-A in FIG. 3;

FIG. 5 is a bottom view of the main body.

FIG. 6 is a plan view of the receiver.

FIG. 7 is a horizontal cross-sectional view of the cover.

FIG. 8 is a sectional view of the wire drawing member.

FIG. 9 is a bottom view of the wire drawing member.

FIG. 10 is an exploded perspective view of a conventional example.

[Explanation of symbols]

1 Electrode holder 21-25
Electrode rod 3 Main body 4 Receiver 5
Covers 81 to 85 Terminals 17 Mounting holes 20 Screw holes

Claims (3)

[Claims] 1. A main body having an electrode rod hanging down from a lower surface and a terminal for the electrode rod being provided on an upper surface, and a receiver to which the main body is fixed with screws, the main body being attached to the receiver. to the main body and the receiver, so that the main body and the receiver can be fixed with screws in at least four mounting positions;
An electrode holder characterized in that a screw mounting hole and a screw hole are respectively formed. 2. The electrode holder according to claim 1, wherein the mounting hole is formed in the peripheral edge of the main body at a position dividing the peripheral edge into two, and the mounting hole is formed in the peripheral edge of the body. The electrode holder is characterized in that the screw hole is formed at a position where the peripheral edge of the electrode holder is divided into four equal parts. 3. The electrode holder according to claim 1, wherein the mounting hole is formed in the peripheral edge of the main body at a position where the peripheral edge is divided into four equal parts, and the mounting hole is formed in the peripheral edge of the receiver. The electrode holder is characterized in that the screw hole is formed at a position that bisects the peripheral edge of the electrode holder.