JPH04516Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a switch holder for a liquid level detector for controlling the liquid level by detecting vertical movement of the liquid level in a tank or the like.

[Prior Art] In a conventional liquid level detector, a heat shrink tube is used when a liquid level detection switch is attached to a guide rail made of an insulating rod or the like. That is, a structure is adopted in which the liquid level detection switch is covered and fixed to the guide rail with a heat-shrinkable tube.

[Problems to be solved by the invention] In the conventional mounting structure of the liquid level detection switch,
When replacing or adding a liquid level detection switch during maintenance, etc., it is necessary to sequentially pass the heat shrink tube from the tip of the guide rail, making the work complicated. especially,
It is extremely difficult to install a new liquid level detection switch in the middle of a guide rail where a pair of detection switches have already been installed. Furthermore, since a heat shrink tube is used, a hot gun or the like is required to fix the liquid level detection switch.

In view of the above-mentioned conventional problems, the purpose of the present invention is to make it easy to install a liquid level detection switch on a guide rail without using special equipment, and to replace or add a liquid level detection switch midway through the guide rail. It is an object of the present invention to provide a switch holder for a liquid level detector which is extremely easy to operate.

[Means for Solving the Problems] The liquid level detector switch holder according to this invention includes a holder body for housing a liquid level detection switch, and a side surface of the holder body for gripping a guide rail. The liquid level detector switch holder including first and second claw parts is characterized by the following features. The first claw portion is formed to extend from one side surface at one longitudinal end of the holder main body. The second claw portion is formed to extend from the other side surface at the other longitudinal end of the holder body.

[Operation] In the liquid level detector switch holder according to this invention, the first and second claw portions do not face each other. The first and second claw portions are formed to extend from one side and the other at one end and the other end in the longitudinal direction of the holder body, respectively. Therefore, by bringing the central part of the holder main body located between the first and second claw parts into contact with the guide rail and rotating the holder main body around the contact part, the first and second The guide rail can be gripped by the claws. Thereby, the holder main body is attached and fixed to the guide rail.

On the other hand, when removing the holder main body from the guide rail, the first and second claw portions can be easily removed from the guide rail by rotating the holder main body in the opposite direction to the above.

In this way, the holder body can be attached to the guide rail with extremely little force by rotating the holder body, so that the guide rail and the liquid level detection switch built into the holder body are Will not be deformed or damaged.

Further, since the holder main body can be easily attached to and detached from the guide rail as described above, the setting position for liquid level detection can be easily changed.

Furthermore, since the first and second claw parts do not face each other, the tips of the claw parts can be made longer.
Thereby, the snap action effect of the claw portion can be enhanced, and the gripping force of the claw portion on the guide rail can be increased.

[Embodiment] In FIG. 1 showing an embodiment of a switch holder for a liquid level detector according to the present invention, a holder main body 1 is made of plastic such as polycarbonate. A pair of claw portions 2 and 3 are formed on the lower surface of the holder 1 and spaced apart from each other in the longitudinal direction of the holder body. Furthermore, a pair of hooks 4 are integrally formed at one longitudinal end of the holder main body 1.

The claw portions 2 and 3 are connected to one linear guide rail 5.
It extends downward so that it can be grasped. One claw part 2 extends downward and back from the front side in FIG. 1 so as to wrap around the guide rail 5, and the other claw part 3 extends from the
It extends downward from the back side of the figure to the front side so as to wrap around the guide rail 5. With this, the pair of claws 2,
3 can elastically grip the guide rail 5 from opposite sides. Also, both claw parts 2 and 3
The gripping surfaces 2a and 3a of the linear guide rail 5
They form part of mutually concentric cylindrical surfaces so that they can be fitted together at once.

The hooks 4 are a pair of members that protrude in the longitudinal direction of the holder body 1 from both sides of the holder body 1 in the width direction. The tips of the hooks 4 are bent in a hook shape toward each other so that they can lock a holder stopper, which will be described later.

As shown in FIG. 2, the holder main body 1 has a hook 4.
It has a hole 6 inside which has an opening on the end face opposite to the . The hole 6 extends into the holder body 1, leaving only the portion of the holder body 1 on the side of the hook 4, thereby making the holder body 1 generally cylindrical.

Note that FIG. 3 shows a holder stopper 7 that is used as necessary. The holder stopper 7 is a member made of sheet metal, and is processed by press molding. The holder stopper 7 has a claw portion 7b that extends integrally from the base plate portion 7a. The lower end of the claw portion 7b is curved to open upward, and the guide rail 5 (FIG. 1) can be fitted into the curved surface. A female thread 7c is formed in the center of the base plate portion 7a, and a screw 8 can be screwed into the female thread 7c. Furthermore, a pair of notches 7d are formed in the base plate portion 7a, and a hook 4 shown in FIG. 1 can be engaged with the notches 7d.

Next, how to use this embodiment will be explained.

First, the reed switch 10 is inserted into the hole 6 of the holder body 1, as shown in FIG. Also,
The holes 6 are filled with adhesive resin and solidified. As the adhesive resin, for example, urethane-based, epoxy-based, silicone-based resins, etc. are used. After the reed switch 10 is housed in the holder body 1 with adhesive resin while maintaining liquid-tightness, the holder body 1 is fixed to the guide rail 5. During the fixing work, as shown in FIG. 4, by placing the central part of the holder body 1 against the guide rail 5 and twisting the holder body 1 by hand in the direction of the arrow around the abutting part, the claws 2 and 3 grips the guide rail 5, thereby fixing the holder main body 1 to the guide rail 5. Note that the reed switch 10 shown in FIG.
has a lead wire 11 and a crimp sleeve 12 provided at the tip thereof.

On the other hand, when removing the holder main body 1 from the guide rail 5, by manually twisting the holder main body 1 in the direction opposite to the arrow in FIG. The guide rail 5
Skeins can be removed.

Generally, the above-mentioned operation is sufficient to fix the holder body 1 to the guide rail 5, but in order to further improve the fixing strength, the holder stopper 7 shown in FIG. 3 is used. In this case, first holder body 1
is fixed to the guide rail 5, and then the notch 7d of the holder stopper 7 is engaged with the hook 4, and the guide rail 5 is fitted into the claw portion 7b. Then, by screwing the screw 8 into the female screw 7c and clamping the guide rail 5 between the tip of the screw 8 and the claw portion 7b, the holder stopper 7 and the holder body 1 can be securely fixed on the guide rail 5. become. The state is shown in FIG. Even in this case, the holder stopper 7 can be easily removed by loosening the screw 8.

The guide rail 5 on which the holder main body 1 having the reed switch 10 molded thereon is fixed at a predetermined position is connected to a float type liquid level detector 1 as shown in FIG. 6, for example.
4 is inserted into the stem 15 of No. 4. A float 16 having a built-in magnet is fitted into the stem 15 so as to be slidable in the vertical direction. Since the float 16 moves up and down following the rise and fall of the liquid level, the reed switch 10 is set at a detection position at an arbitrary position.
When the liquid level reaches the level shown in FIG. 4, the reed switch 10 is actuated by the magnetic force of the magnet within the float 16.

According to the embodiment, even when a large number of holder bodies 1 are to be fixed to the guide rail 5, the attachment can be easily performed with one touch. Moreover, no tools such as a hot gun or power supply are required, and the work of adding and replacing contacts can be easily performed. Since the reed switch 10 is molded inside the strong holder body 1, it will not break easily even if the switch part is accidentally stepped on or dropped. Since the holder body 1 is sealed with a molding material made of adhesive resin, there is no fear that the reed switch 10 will suffer insulation failure due to the influence of moisture or the like. Moreover, by attaching the holder stopper 7 to the holder body 1,
It is also possible to completely fix the holder main body 1 to the guide rail 5 to prevent positional displacement due to vibration and positional displacement during insertion into the stem.

[Another embodiment] (a) In the above embodiment, the holder body 1 is formed in advance, and the reed switch 1 is placed inside the holder body 1.
Although the configuration is such that the reed switch 10 is molded, the entire holder body 1 may be directly formed on the reed switch 10 by a molding method.

(b) In addition to the reed switch 10, a capacitive type,
Various types of switches such as optical type, liquid contact type, piezoelectric type, etc. can be used. In addition, in the case of a liquid contact type, it is necessary to allow an external liquid to come into contact with the reed switch 10 portion.

(c) It is also possible to provide a bulge in the center of the lower surface of the holder body 1 so that when the holder body 1 is fixed to the guide rail 5, the holding strength by the claws 2 and 3 is increased.

[Effect of the invention] As described above, according to this invention, the first and second
The claws are formed on the sides of the holder body so that they do not face each other at one end and the other end in the longitudinal direction of the holder body, so that by rotating the holder body, the holder body can be easily attached to the guide rail with little force. It can be attached and detached. Furthermore, since the holder body can be easily attached to and detached from the guide rail, the setting position for liquid level detection can be easily changed. Furthermore, since the first and second claw parts do not face each other, the tips of the claw parts can be made longer. Thereby, the gripping force of the claw portion on the guide rail can be improved. As a result, according to this invention, it is possible to obtain a liquid level detector switch holder that has a strong mounting force.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the holder according to the present invention, FIG. 2 is a partially longitudinal side view thereof, FIG. 3 is a perspective view of the holder stopper, and FIG. 4 is a diagram showing the holder in use.
FIG. 5 is a diagram showing how the holder stopper is used, and FIG. 6 is a schematic side view showing a more specific usage state of the holder. 1 is a holder main body, 2, 3, and 22 are claw parts, and 10 is a reed switch.

Claims (1)

[Claims for Utility Model Registration] A liquid liquid comprising a holder body for incorporating a liquid level detection switch, and first and second claws formed on the side surfaces of the holder body for gripping a guide rail. In the switch holder for a surface detector, the first claw part is formed to extend from one of the side surfaces at one end in the longitudinal direction of the holder body, and the second claw part is formed in the longitudinal direction of the holder main body. A switch holder for a liquid level detector, characterized in that the switch holder is formed so as to extend from the other side of the side surface at the other end in the direction.