JPH0348827Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technology of the invention The invention relates to a mounting device for a piston position detection switch of a cylinder, and in particular, the piston position detection switch arranged on the outer circumferential surface of the cylinder is mounted on a thin film wound around the cylinder. This invention relates to a mounting device for a piston position detection switch that uses a steel strip, metal fittings connected to both ends of the steel strip to press the switch, and screws for tightening and fixing the switch to a cylinder.

(b) Problems with the conventional technology Conventionally, the piston position detection switch mounting device for hydraulic or air cylinders is as follows:
As shown in FIG. 7, a detection switch 2 is arranged on the outer circumferential surface of the cylinder 1, a thin steel strip 3 is wound around the cylinder 1 at the location where the switch is arranged, and both ends thereof are opposed to both sides of the detection switch 2. Grooves 5 at both ends of the metal plate 4 placed above the detection switch 2
The detection switch 2 is fixed to the cylinder 1 by engaging both rising ends of the steel strip 3 and tightening the upper surface of the detection switch 2 with a screw 6 screwed into the center of the metal plate 4. .

In the conventional mounting device as described above, since the engaging portion of the metal plate 4 that hooks both ends of the steel strip 3 is the groove 5, sufficient attention must be paid to the engagement state, and in addition, the screw Since the steel strip 3, metal plate 4, etc. are unstable until they are tightened to a certain extent at step 6,
These attachment parts are not easy to assemble and the work is complicated, and the engagement tip of the steel strip protrudes from the metal plate 4, which is dangerous. Furthermore, since the threaded end of the screw 6 directly presses against the upper surface of the detection switch 2, there is a risk that the switch casing or the like may be damaged due to concentrated load caused by over-tightening the screw 6 or the like.

(c) Purpose of the invention This invention was made to solve the conventional problems as mentioned above, and it improves the assembly work of the switch mounting parts, eliminates the risk of placing concentrated loads on the switch, and eliminates the risk of danger. An object of the present invention is to provide a piston position detection switch mounting device for a cylinder that is free of piston position detection.

(b) Structure of the invention The piston position detection switch mounting device for a cylinder according to the invention consists of a substantially U-shaped thin steel strip fitted around the outer periphery of the cylinder, and a rectangular hole formed at both ends of the steel strip. A connecting metal fitting having hooks with engaging flanges at both ends and having a threaded hole in the center engages with the upper surface of the piston position detection switch arranged on the outer circumferential surface of the cylinder, and the engaging surface thereof A box-shaped presser metal fitting that is open to accommodate the above-mentioned connecting metal fitting and has a screw insertion hole in the center of the top plate; It consists of a tightening screw that is screwed into a screw hole, and has a box-shaped holding fitting that encloses the connecting fitting and the tip of the steel strip that is locked to it to improve safety.
By screwing the tightening screw into the connecting fitting through the box-shaped holding fitting, the fitting parts are not separated from each other, facilitating and stabilizing the assembly, and preventing concentrated loads on the switch.

(e) Embodiment of the invention An embodiment of the invention will be described below with reference to FIGS. 1 to 6.

As shown in FIGS. 1 to 3, the cylinder 11
, the piston position detection switch 12 (hereinafter referred to as
The mounting device 10 for holding the piston position detection switch 12 has a thin steel strip 20 that can be easily plastically deformed along the outer periphery of the cylinder 11. When the cylinder 11 is held in place, it is bent into a substantially U-shape corresponding to the outer diameter of the cylinder 11, and square holes 21 and 22 are bored in the rising tip facing both sides of the detection switch 12.

The mounting device 10 also has a screw hole 3 in the center.
1, and hook portions 32, 33 are provided at opposing ends of the connecting fitting 30 to engage square holes 21, 22 at both ends of the steel strip 20.
are formed, and each hook 32, 3
3, each square hole 21, 22 has a hook 32,
Flanges 34 and 35 are respectively formed to prevent them from being unnecessarily removed from 33.

Further, the mounting device 10 includes a box-shaped holding fitting 40 whose bottom surface is open, and a tightening screw 50 that is screwed into the screw hole 31 of the connecting fitting 30.

The opening edge 41 of the box-shaped presser fitting 40 is pressed into engagement with the upper surface of the detection switch 12, and the tip of the steel strip 20, which is engaged with the connecting fitting 30 and its hooks 32, 33, is connected to the box-shaped presser fitting 40. 40 spaces 42, and
There is a screw insertion hole 43 in the center of the top plate of the box-shaped presser metal fitting 40.
is drilled. Therefore, the tightening screw 50 passes through the hole 43 and is screwed into the threaded hole 31 of the connecting fitting 30.

Further, a reinforcing member 60 is attached to the outer periphery of the detection switch 12 to which the box-shaped presser metal fitting 40 is engaged. This reinforcing member 60 is formed from a metal plate material into a U-shape, and is attached to the case 12 of the detection switch 12.
On the outer periphery of a, there is a stepped portion 12b that matches the reinforcing member 60.
is formed, and a reinforcing member 6 is formed on this stepped portion 12b.
0 mechanically reinforces the detection switch portion to which the presser fitting 40 is press-engaged. As shown in the figure, the recess 62
and a convex portion 12c that is further engaged with the concave portion 62.
is formed on the side surface of the stepped portion 12b, so that the reinforcing member 60 is stably held on the detection switch 12.

When attaching the detection switch 12 to the cylinder 11 using the attaching device 10 configured as described above, the steel strip 20 bent into a substantially U-shape according to the outer diameter of the cylinder 11 is fitted onto the cylinder 11 in advance. ,
Then, connect the square holes 21 and 22 at both ends to the connecting fitting 3.
0 hooks 32 and 33. At this time, even if the connecting fitting 30 is not held with fingers or the like, the connecting fitting 30 and both ends of the steel strip 20 will not be separated.

The part of the connecting fitting 30 in this state is covered with the box-shaped holding fitting 40, and the screw 50 is inserted through the insertion hole 43 and screwed into the screw hole 31 of the connecting fitting 30.

As a result, the steel strip 20, the connecting metal fitting 30, and the box-shaped holding metal fitting 40 are in a mutually connected and non-separable state.

Thereafter, the detection switch 12 is inserted between the outer circumferential surface of the cylinder 11 and the opening edge 41 of the presser metal fitting 40 and set at a predetermined position on the cylinder outer circumferential surface, and the presser metal fitting 40 is positioned on the reinforcing member 60. , rotate the screw 50 in the tightening direction. Accordingly, the connecting fitting 30 moves in the direction of arrow A in FIG.
is pressed against the upper surface of the reinforcing member 60, and this relative action presses and fixes the detection switch 12 to the circumferential surface of the cylinder 11.

Note that the procedure for installing the detection switch 12 is, of course, not limited to the procedure described above.

In this embodiment as described above, the square holes 21 and 22 of the steel strip 20 and the connecting fitting 30 are connected to the hook 32,
31 and cannot be detached by the flanges 34 and 35, and when the screw 50 is screwed into the connecting fitting 30, each mounting part including the box-shaped holding fitting 40 becomes an integral structure that cannot be separated. , even if the screws 50 are not tightened, each attachment part will not be separated, and a stable assembled state can be maintained. In addition, each attachment part can be easily assembled, and the detection switch 12 can be easily attached to the cylinder 11. .

Furthermore, since the joint end of the steel strip 20 including the connecting fitting 30 is enclosed by the box-shaped holding fitting 40, the steel strip 20
It is safe as there is no risk of injury to hands etc. due to the edge of the handle. Furthermore, since the presser metal fitting 40 presses the detection switch 12, there is no concentrated load on one point as in the conventional case, and the risk of damage to the detection switch due to over-tightening of the screw 50 can be eliminated.

Furthermore, since the casing 12a of the detection switch 12 is reinforced by the reinforcing member 60, the safety against damage to the detection switch 12 can be further increased. Magnetism can be shielded, detection switch 12
Malfunctions can be prevented.

(F) Effect of the invention As explained above, according to the invention, the square hole of the steel strip and the connecting fitting are connected by the hook provided therein, and the steel strip joint including the connecting fitting is connected to the box. It is surrounded by a box-shaped switch holding fitting, and the tightening screw is screwed into the connecting fitting through an insertion hole formed in the box-shaped holding fitting, so care must be taken to ensure that the steel strip and the connecting fitting are not caught. This eliminates the need to maintain a stable assembly state, and makes it easier to assemble each attachment part.Furthermore, since the tip edge of the steel strip is included, safety during installation can be ensured sufficiently. Furthermore, since the box-shaped holding fitting contacts the detection switch over a wide area, there is no risk of damage to the detection switch due to over-tightening of the screw. Furthermore, since the reinforcing member is attached to the detection switch case, the safety against damage to the detection switch can be further increased, and the reinforcing member can also be used to prevent malfunction of the switch due to external magnetism.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view showing an example of the mounting device according to the present invention, Figure 2 is a side view thereof, and Figure 3 is a partially cutaway front view showing an example of the mounting device according to the present invention.
The figure is an exploded perspective view of the mounting device according to the present invention.
The figure is a cross-sectional view of the box-shaped presser fitting according to the present invention.
6 is a sectional view of the reinforcing member according to the present invention, and FIG. 7 is a front view of a conventional mounting device. 10...Mounting device, 11...Cylinder, 12...Detection switch, 20...Steel strip, 21, 22...Square hole, 30
...Connection fitting, 31...Screw hole, 32, 33...Hook, 40...Box-shaped presser fitting, 41...Opening edge, 43
...insertion hole, 50...tightening screw, 60...reinforcing member.

Claims (1)

[Claims for Utility Model Registration] (1) A substantially U-shaped thin steel strip that fits around the outer periphery of the cylinder, and flanged hooks on both ends that engage square holes formed at both ends of the steel strip. A connecting fitting having a threaded hole in the center thereof engages with the upper surface of a piston position detection switch disposed on the outer peripheral surface of the cylinder, and the engaging surface is open to accommodate the connecting fitting. a box-shaped presser metal fitting that is designed to be held in place and has a screw insertion hole in the center of the top plate; and a tightening screw that is inserted through the screw insertion hole of the box-shaped presser metal fitting and screwed into the screw hole of the connecting metal fitting. A cylinder piston position detection switch mounting device characterized by comprising: (2) The piston position detection switch mounting device for a cylinder as set forth in claim 1, wherein the portion of the detection switch that the box-shaped holding fitting comes into pressure contact with is reinforced with a reinforcing member. (3) Utility model registration claim 2, characterized in that the reinforcing member is composed of a magnetic shielding material
The piston position detection switch mounting device for the cylinder described in 2.