JPH019300Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a limit switch, and particularly relates to an improvement of a limit switch in which an actuator is provided on the upper part of the switch body.

Background of the invention A limit switch is a switch used in various mechanical devices, etc., whose contacts are switched when the operation of the mechanical device reaches a certain limit position. The limit switch is the device in which it is used,
Due to the installation location, the switch is often enclosed in a sturdy die-cast case to make it water and oil resistant. In other words, limit switches are used under harsh conditions where they are easily contaminated with water, dust, oil, etc., so their surfaces tend to become dirty.

By the way, the type, rating, etc. of the limit switch are generally written on the surface of the limit switch, especially on the front side.
A nameplate with handling instructions etc. is attached.
The person using the limit switch uses the limit switch in the optimum location and conditions based on the description on the nameplate. However, as mentioned above, limit switches are often used in environments with a lot of dust and oil, so if oil or the like gets on this nameplate, dust and dirt will easily stick to it, making it difficult to identify what is written on the nameplate. There are many cases where this is not possible.
The main cause of such oil adhesion is that when lubricating the actuator installed at the top of the limit switch, excess lubricant poured into the actuator travels down the side of the limit switch, and the name plate attached to the side is It often adheres by flowing over it.

Purpose of the invention Therefore, the main purpose of this invention is to eliminate the above-mentioned drawbacks and to provide a limit switch that is devised so that oil does not get on the name plate attached to the side of the limit switch body, and the name plate is difficult to get dirty. .

Structure and effect of the invention To put it simply, this invention is a limit switch in which an actuator is provided on the upper part of the switch body and a name plate is attached to either side of the switch body. A protrusion for protecting the nameplate is formed that protrudes perpendicularly from the switch body, and a recess is formed on the back side of the face of the switch body to which the nameplate is attached, and that receives the protrusion when the limit switches are arranged side by side. It is a limit switch that is characterized by

As described above, according to this invention, by providing a protrusion at least above the nameplate attached to the side of the switch body, for example, when lubricating oil is applied, excess water flows from the top of the switch body to the side. The oil is blocked by the protrusion and does not flow over the nameplate. Therefore, oil does not adhere to the name plate, and furthermore, the name plate can be prevented from becoming dirty with dust, dirt, etc.

Further, when a plurality of limit switches are arranged horizontally and used, the protrusions and the recesses are provided on opposing sides of the switch body, so that the protrusions and the recesses can be combined. In addition, temporary assembly of the array is possible, and rattling when attaching the array can be reduced.

Furthermore, even if the limit switch is accidentally dropped on the floor, the protrusion formed on the limit switch prevents the nameplate from being damaged.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing the front side of the limit switch. First, this limit switch 1
The configuration will be briefly explained. Limit switch 1
A head 3 is attached to the upper part of a main body 2 in which, for example, a micro switch (not shown) is built-in, by being tightened with a head tightening screw 4. An actuator 5 projects upward from the head 3. The actuator 5 includes a plunger 6, a roller 7 rotatably attached to the plunger 6, and a plunger support 8 that supports the plunger 6. By moving this plunger 6 up and down, a micro switch built into the main body 2 is opened and closed.

Further, a nameplate 10 is attached to the front side 9 of the main body 2. A U-shaped protrusion 11 is formed to protrude at right angles to the front surface 9 and surround the nameplate 10 above and on the left and right sides. As will be described later, this protrusion 11 serves to block oil from flowing down from above the limit switch 1 along the side surface of the main body 2 and from flowing onto the nameplate 10. In this embodiment, the protrusion 11 is a U-shaped protrusion that covers the upper part and the left and right sides of the nameplate 10, but at least
It suffices if the protrusion covers the upper part of 0. Also, protrusion 1
The shape of 1 is not limited to a U-shape, but may be a so-called roof-shaped protrusion formed diagonally from side to side with the apex above the nameplate 10 as the apex. That is,
It is sufficient that a protrusion is formed at least above the nameplate 10.

The main body 2 of the limit switch 1 is further formed with a mounting screw hole 12 penetrating from the front side 9 to the back side. Then, the limit switch 1 is placed at a predetermined mounting position on the mounting object 13,
A mounting screw 14 is passed through the mounting screw hole 12 and is removably mounted to the object to be mounted, for example, with a screw.

Now, the actuator 5 formed by the roller 7, the plunger 6, etc. is always lubricated with lubricating oil so that its movement is smooth. At this time, the excess lubricating oil applied to the actuator 5 flows along the side surface of the main body 2 as shown by arrow 19. At this time, the oil transmitted along the front surface 9 is
Therefore, as shown by the arrow mark 19, the water separates from the left and right sides of the protrusion 11 and flows down. Therefore, oil will not flow on the nameplate 10 surrounded by the protrusions 11.

Next, FIG. 2 is a perspective view showing the back side 15 of the limit switch 1 shown in FIG. 1. Second
Referring to the figure, the back side 15 of limit switch 1
The configuration of is explained. A recess 16 corresponding to the protrusion 11 formed on the front side 9 is formed on the back side 15 . This recess 16 is a recess formed so as to be able to receive the protrusion 11 formed on the front surface 9 when the limit switches 1 are arranged side by side. Furthermore, a groove 17 is formed above the recess 16 and connected to the recess 16 . The groove 17 extends to the upper end of the limit switch 1. Therefore, actuator 5
When the excess oil supplied to the limit switch flows through the back surface 15 of the limit switch, it flows through this groove 17 and the recess 16 connected thereto. In addition,
The grooves 17 are not limited to two grooves as shown in FIG.
Of course, it doesn't matter if it's one or three or more.

Next, FIG. 3 shows an example of the use of the limit switch 1 of this invention. As shown in Fig. 1, the limit switch 1 is used as a single limit switch 1 attached to an object 13, or as shown in Fig. 3, it is arranged side by side and attached to an object 13. It is often installed and used. FIG. 3 shows an example of such usage.

In FIG. 3, three limit switches 1a, 1b, and 1c are arranged side by side on an object 13 and are attached using attachment screws 18.

In this case, as described above, each limit switch 1a, 1b, 1c has a protrusion 11 formed on its front side 9, and a recess 16 formed on its back side 15. When the protrusion 11 is received, each limit switch 1a to 1c
has less rattling between limit switches and can be easily arranged.

Furthermore, in this way, the limit switch 1a
1c to 1c arranged in the horizontal direction, the depth of the recess 16 formed on the back surface 15 that receives the protrusion 11 formed on the front surface 9 is set to be greater than the protruding height of the protrusion 11, for example. You can make it deeper. (See Figure 3) When the recess 16 is deepened in this way, the excess oil that flows down from the upper part of the limit switches 1a to 1c first flows down from the upper part through the groove 17, and then flows down the gap between the protrusion 11 and the recess 16. It is transmitted and flows down. Therefore, there is an advantage that oil does not adhere to the nameplate 10 surrounded by the protrusions 11 at all.

Further, in this embodiment, the lower end of the recess 16 is cut in a direction perpendicular to the back surface 15; Once applied, the oil will flow smoothly. Furthermore, the lower part of the recess 16 is connected to the limit switch body 2.
You can extend it to the bottom of the .

Finally, in this limit switch, the actuator 5 is formed of a roller, a plunger, a bearing, etc., but the limit switch is not limited to having an actuator of such a shape.
I would like to add that, of course, other formats are also possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a limit switch according to an embodiment of this invention, showing the front side of the main body of the limit switch. FIG. 2 is a perspective view showing the back side of the limit switch shown in FIG. 1. FIG. 3 is a diagram showing one method of using the limit switch of this invention. In the figure, 1 is the limit switch, 2 is the limit switch body, 9 is the front side, 10 is the name plate, 1
1 is a protrusion, 15 is a back surface, 16 is a recess, and 17 is a groove. In each figure, the same numbers indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) In a limit switch in which an actuator is provided at the top of the switch body and a name plate is attached to either side of the switch body, at least above the name plate, in a direction perpendicular to the side face of the switch body. A protruding protrusion for protecting the name plate is formed, and a recess is formed on the back side of the face of the switch body on which the name plate is attached, to receive the protrusion when the limit switches are arranged side by side. A limit switch characterized by: (2) A utility model according to claim 1, characterized in that the surface in which the recess is formed further has a groove connected to the recess and extending to the upper part of the switch body. Limit switch. (3) The recessed portion is formed deeper than the depth capable of receiving the protrusion when the limit switches are arranged side by side. Limit switch described in Section 2. (4) The utility model according to any one of claims 1 to 3, wherein the protrusion is a protrusion formed to surround the upper, right and left sides of the nameplate. Limit switch.