JPS5927413A - Dog of limit switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a limit switch dog used to detect the moving position of a mechanical device.

The dog of a conventional limit switch is made of steel, as shown in Figs. 1) There is a slotted groove C connected thereto, and a round countersunk hole e perpendicular to the slotted groove C, a bolt hole f, and a threaded hole g communicating with the bolt hole fl are opened. ing. Then, by inserting a hexagonal socket bolt h into the borehole e and tightening the bolt h while rotating, the slotted groove portion d is distorted and the threaded stud a inserted into the through hole is tightened. Dog 1 is fixed to stud a. Conventional dog of this kind
Since machining of the screw hole g in K starts from the R surface on the outer periphery, there is a strong tendency for the cutting tool to scrape the R surface and escape, making machining difficult because the center cannot be determined. Since precision is required, considerable skill is required. In addition, limit switch dogs are often installed and adjusted in narrow spaces between mechanical equipment and other equipment, and with conventional dog structures, a hexagonal wrench wrench can only be used from one direction, making this very difficult. This is the place to do it.

In view of the above, the present invention provides a limit switch dog which can be tightened from any direction and which is easy to manufacture and process, thereby solving the various drawbacks of the prior art.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 is a limit switch, 2 is its roller, and 3 is a casing. 4 is the dog body of limit switch 1,
This dog body 4t has a through hole 6 for inserting a screw stud 5, etc., which is opened in the axial direction of the dog body 4t, and a through hole 6 for inserting a screw stud 5, etc. in a slotted groove portion 8 below the center. A slotted groove 7 extending in the axial direction is provided. Then, this slotted groove 8t has a hexagonal counterbore hole 9 for tightening and insertion, which is perpendicular to the slotted groove 7, and a bolt hole 1.
If 0 is opened, is this hexagonal counterbore? A hexagonal counterbore hole 11 and a bolt hole 12 for tightening and insertion, which are symmetrical with the bolt hole 10 and have the same shape, are provided.

In the figure, 13 is a hexagon socket head bolt, and 14 is a hexagon nut.

The dog main body 4 is preferably constructed by molding its main portion from synthetic resin 4a and covering its outer peripheral surface with hard chrome plating 4b. This is because it is possible to prevent wear on the surface of the roller 2 of the limit switch 1 and prevent damage to the dog due to cutting sparks or welding sparks.

Next, to explain the tightened state (installed state) of the present invention, first, the dog main body 4 is inserted into the screw stud 5 or the like. Then either hexagonal counterbore hole 9 or 11
Insert the hexagonal socket head bolt 15 further, and fit the hexagonal nut 14 into the other hexagonal counterbore hole 11 or 9. Then, turn the hexagon socket head bolt 15 using the hexagon wrench 15, and screw the hexagon socket head bolt 13 into the hexagon socket head (14f).In this process, the slotted groove 8 is gradually distorted, and thereby the dog body 4 is fixed to the screw stud 5 or the like.

As described in detail above, the present invention has a symmetrical hexagonal counterbore hole and a bolt hole in the slotted groove portion of the dog, and hexagonal socket bolts are provided in both hexagonal counterbore holes and bolt holes. Since it is possible to insert a hexagonal nut into any of the hexagonal counterbore holes,
The dog can be tightened from two symmetrical directions, allowing for installation and adjustment work in confined spaces, making work easier and more efficient. In addition, it is no longer necessary to open dovetail holes on one or two sides as in the past, which simplifies the manufacturing process, improves work efficiency, reduces processing costs, and provides practical applications such as being able to provide inexpensive dogs. It has the above effect.

(4)

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams showing the dog of a conventional limit switch, Figure 4 is a partially cutaway front view showing an example of the present invention, Figure 5 is a left side view of the same, and Figure 6 is a limit switch. A right side view of the same as the above partially cut out showing the relationship with the switch, FIG. 7 is a front view of the partially cut out showing another example, and FIG. 8 is a partially cut out same as above showing the relationship with the limit switch. It is a right side view. 1...Limit switch, 4...Dog body, 5...Screw stud, 6--Through hole, 7
...Slot groove, 8...Slot groove part,
9-・Hexagonal counterbore hole, 1o・Bolt hole,
11--Hexagonal counterbore hole, 12--Bolt hole, 1s--Hexagon socket head bolt, 14--Hexagon nut, 15--Hexagonal spanner. Patent applicant Yasuhiro Arai

Claims (1)

[Claims] (+) In a limit switch dog having one through hole in the axial direction for inserting a screw stud, etc., and one slotted groove connected to the through hole, A hexagonal counterbore hole and a bolt hole for tightening and insertion are provided perpendicular to the slotted groove, and a hexagonal counterbored hole and a bolt hole for tightening and insertion are provided in a symmetrical relationship with the hexagonal counterbored hole. Then, turn the hexagon socket head bolt inserted through one of the hexagon countersink holes, and screw the hexagon socket head screw inserted into the other hexagon countersink hole. A limit switch dog that can be tightened even from any direction. (Seal) The limit switch dog according to claim 1, wherein the dog is made of synthetic resin and hard chrome plating covering the synthetic resin.