JPH079241B2 - Switch mounting bracket for fluid pressure cylinder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket for a piston position detecting reed switch of a fluid pressure cylinder such as a pneumatic cylinder.

[Prior art]

In a fluid pressure cylinder, for example, a pneumatic cylinder, a reed switch is fixed on the outer circumference of a cylinder tube in order to detect the piston position. As a conventional mounting method, a method of tightening with a band wound around the outer circumference of the cylinder tube, JP-B-67-1370,
There is known a method of mounting using a special mounting bracket shown in Japanese Utility Model Publication No. 63-14084.

The method of tightening with a band has a problem that the cylinder tube is distorted.
If the diameter of the cylinder tube of the fluid pressure cylinder is different depending on the usage, and the thickness of the tie rods that tighten both ends of the fluid pressure cylinder (collectively referred to as tension bolts, etc.) is also different, the mounting bracket cannot be shared Dedicated mounting hardware is required. In other words, the compatibility of the mounting bracket is poor,
If the size of the cylinder tube and tie rod is different,
There was a problem that it was necessary to prepare a mounting bracket of another size, and it was expensive.

[Problems to be Solved by the Invention]

The present invention solves the above-described conventional problems, and is not restricted by the diameter of the cylinder tube or the thickness of the tie rods, and is commonly used for a plurality of cylinder tubes having different diameters, a switch,
For example, it is an object to provide a switch mounting bracket for a fluid pressure cylinder that enables mounting a reed switch.

[Means for Solving the Problems]

The present invention solves the above-mentioned problems by forming a curved pressing portion having one end in contact with at least two positions of a switch frame body, and the other end bent into a side opposite to the pressing portion. And a strip plate-shaped fixing plate that can be inserted between the outer surface of the cylinder tube of the fluid pressure cylinder and the tie rod, and both ends are bent to the opposite side so that one end can abut the tie rod and the other end It has a strip plate-shaped tightening plate into which a screw hole is formed and into which the adjusting screw is screwed in.Press the switch frame body toward the cylinder from the holding part, and screw the adjusting screw to bring the tightening plate into the tie rod and the tightening support part. This was solved by a switch mounting bracket for a fluid pressure cylinder, which is characterized in that the switch is fixedly held on the cylinder tube by tightening between them.

[Action]

According to the present invention, the fixing plate is inserted between the tie rod and the cylinder tube, and the holding portion extends so as to hold the switch frame body and contacts the switch frame body at at least two positions. The intermediate portion of the fixing plate further contacts the tie rod and the cylinder tube. With respect to this fixed plate, place the tightening plate between the tie rod and the tightening support part of the fixed plate, and screw the adjusting screw screwed into the tightening plate toward the tightening support part, Because it abuts the tie rod and fixes the position,
Tension is applied to the fixing plate, and the force of the pressing portion that presses the switch against the cylinder tube is increased to firmly fix the switch.

〔Example〕

 The details of the present invention will be described based on the embodiments shown in the drawings.

In FIGS. 1 and 2, a fluid pressure cylinder having a cylinder tube 1 and a tie rod 2, for example, a pneumatic cylinder, is provided with a switch 3, for example, a reed switch, and a mounting bracket 4.
Fixed by.

Each of the mounting members 4 has a strip-shaped fixing plate 5 and a tightening plate 6.

The fixing plate 5 has a pressing portion 7 formed as a curved surface at one end.
At the opposite end, there is a tightening support portion 8 bent in the direction opposite to the pressing portion 7.

The pressing portion 7 comes into contact with the switch 3 at least at two positions by coming into contact with the edge portion of the frame body of the switch 3. While the fixing plate 5 is in line contact with the edge of the frame of the switch 3, the edge of the frame of the switch 3 is chamfered as shown in FIG. You can also

Both ends of the tightening plate 6 are bent in opposite directions, and each has a pressing end 9 facing the tie rod 2 and a tightening end 10 facing the tightening support 8. The holding end 9 is formed in a fork end shape, and has legs 11 extending so as to sandwich the fixed plate 5 on both sides, and has a function of preventing the tightening plate 6 from being displaced left and right with respect to the fixed plate 5. A screw hole 12 is formed in the tightening end 10 and an adjusting screw 13 is screwed therein, and the adjusting screw 13 has a length sufficient to abut and hold the tightening support portion 8.

When fixing the switch, the fixing plate 5 was inserted into the space between the tie rod 2 and the cylinder tube 1 from the side of the tightening support portion 8, and the holding portion 7 was placed on the cylinder tube 1 in parallel with the tie rod 2. Touch the switch 3. The fixed plate 5 contacts the switch 3 and, at the same time, contacts the tie rod 2 and the cylinder tube 1, so that the fixed plate 5 presses the switch 3 against the cylinder tube 1 by a wedge action. At that time, the pressing end 9 of the tightening plate 6 is brought into contact with the tie rod 2, and the tightening plate 6 is arranged on the fixing plate 5 with the fixing plate 5 being sandwiched between the legs 11, and the tightening end 10 When the adjusting screw 13 screwed into the screw hole 12 is screwed in, the tip end of the adjusting screw 12 abuts on the tightening support portion 8 of the fixed plate 5, and when further screwed, the force for pressing the switch 3 against the cylinder tube 1 is reached. Is strengthened. By forming a concave portion in which the tip end of the adjusting screw 12 fits in the tightening support portion 8, it is possible to prevent the tightening plate 6 from being displaced with respect to the fixed plate 5.

When the same mounting bracket 4 is used in a fluid pressure cylinder having a cylinder tube and a tie rod having a diameter larger than that of the example of FIG. 1, the result becomes as shown in FIG. 3, and the tie rod 2 of the fixing plate 5 is different from the example of FIG. Although the contact positions with respect to the cylinder tube 1'and the cylinder tube 1'are different, the action of fixing the switch 3 to the cylinder tube 1'by the fixing plate 5 is exactly the same. In addition, since the dimensional shape of the fixed plate 5 does not change,
The mounting position of the switch 3 changes as a relative position to the tie rods 2 and 2 '. In the example of FIG. 3, the switch 3 and the tie rod 2 have a central angle θ with respect to the center of the cylinder tube 1, whereas in the example of FIG.

〔effect〕

According to the present invention, a switch can be mounted on a plurality of types of fluid pressure cylinders having cylinder tubes of different diameters with the same mounting bracket, and further, maintenance such as mounting adjustment and switch replacement is easy. Inventory management of mounting brackets for manufacturers and users has become easier.

[Brief description of drawings]

FIG. 1 is a sectional view of a switch mounting bracket for a fluid pressure cylinder according to the present invention in a mounted state, FIG. 2 is a partial perspective view, and FIG. 3 is a view corresponding to FIG. 1 in the case of fluid pressure cylinders having different dimensions. Is. 1 ... Cylinder tube, 2 ... Tie rod 3 ... Switch, 4 ... Mounting bracket 5 ... Fixing plate, 6 ... Tightening plate 7 ... Pressing part, 8 ... Tightening supporting part 9 ... Pressing end , 10 …… tightening end 12 …… screw hole, 13 …… adjusting screw

Claims (1)

[Claims] 1. One end is formed as a curved pressing portion that comes into contact with at least two positions of a switch frame, and the other end is formed as a tightening support portion that is bent on the side opposite to the pressing portion. , A strip-shaped fixing plate that can be inserted between the outer surface of the cylinder tube of the fluid pressure cylinder and the tie rod, and both ends bent to opposite sides so that one end can abut against the tie rod and the other end has a screw hole And a strip plate-shaped tightening plate into which the adjusting screw is screwed, the switch frame body is pressed toward the cylinder by the pressing portion, and the tightening plate is tightened by a tie rod and a tightening support portion by screwing the adjusting screw. A switch mounting bracket for a fluid pressure cylinder, characterized in that the switch is fixedly held on the cylinder tube by tightening between.