JPS5844498Y2 - Fluid pressure cylinder switch mounting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch mounting device for a fluid cylinder with a switch such as a reed switch.

Conventional methods for attaching switches to fluid cylinders include:
The switch can be mounted using a metal band, or, as shown in Figure 1, the switch can be mounted by placing the metal fitting on which the switch is mounted across two tie rods and pressing the tie rods with screws.

However, these methods have the disadvantage that the metal band is plastically deformed, stretched, and loosened by the vibration and impact caused by the reciprocating motion of the fluid cylinder.
In addition, in the latter case, the screws that press the tie rods tend to loosen due to vibration or shock, and in both cases, there is a risk that the switch mounting position may shift during long-term use.Furthermore, with the former band method, adjusting the switch mounting position is troublesome. It also had the disadvantage of being

The present invention utilizes two tie rods for the fluid cylinder,
The object of the present invention is to solve the above-mentioned drawbacks by using the elastic force of the mounting fittings and to obtain a switch mounting device that can withstand long-term use.

The configuration of the present invention will be described with reference to the illustrated embodiment.

In FIG. 2, 1 is a cylinder tube, 2 is a tie rod, and a mounting bracket 3 having a roughly C-shaped cross section is
It is mounted across two tie rods 2, and a mounting screw 4 is screwed into the approximate center of the mounting bracket.

The switch 5 is pressed against the outer surface of the cylinder tube 1 by the mounting screw 4 through the seat 6.

In the figure, 7 indicates a fixing nut for the mounting screw 4, and 8 indicates an elastic body such as rubber attached to the lower surface of the switch 5.

Since the mounting bracket 3 is made of metal and has a roughly C shape,
When installing the switch 5, by tightening the mounting screws 4, the mounting bracket 3 will firmly contact the two tie rods 2, so even if vibrations or shocks due to the operation of the fluid cylinder are applied, the elastic force of the mounting bracket will prevent the installation. This can prevent the screw 4 from loosening.

In the present invention, with the switch fixed at a tightening torque of 7 to 10 kg-cm, the frequency is 20 Hz, and the acceleration is 7 G.
Even after conducting a vibration test for 8 continuous hours under the conditions of a vibration width of 12 mm and a speed of 600 mm/sec, no loosening of the mounting screws or displacement of the switch was observed, and good results were obtained.

In this way, the device of the present invention can hold the switch in a fixed position for a long time due to the elastic force of the mounting bracket.Furthermore, although the embodiment shown in FIG. 2 uses two adjacent tie rods, Since a fluid cylinder normally has four tie rods, the same effect can be achieved by using diagonally arranged tie rods, for example.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing a conventional example, and FIG. 2 is a sectional view of a main part showing an embodiment of the present invention. Explanation of symbols 1...Cylinder tube, 2...
...Tie rod, 3...Mounting bracket, 4...
...Mounting screw, 5...Switch, 6...
...Uke is za, 7...Natsuto, 8...
Elastic body.

Claims (1)

[Scope of utility model registration request] A fluid cylinder that has a mounting bracket that is large enough to span two tie rods and has a roughly C-shaped cross section, and a mounting screw that is screwed onto the mounting bracket and that presses the switch against the outer surface of the cylinder tube. Switch mounting device.