JPS5977140A - Thrust releaser - Google Patents

Abstract

PURPOSE:To stop a sliding motion of a push shaft member upon occurrence of stronger resistance than predetermined force, by providing a safety device constituted of balls put into a groove made on the periphery of the push shaft member, the balls being held in place by springs adjusted so as to exert predetermined force to the balls. CONSTITUTION:An advancing and retreating arm 1 is constructed of a shaft member 3 slidably fitted into a cylinder body 2 at the inner end portion thereof. The shaft member 3 is provided with a groove on its periphery, against which balls 6 are pressed by springs 5 energized with compressive force. A threaded shaft 15 provided at the outer end of the cylinder body 2 is coupled with an advancing and retreating apparatus, e.g. a cylinder, and a threaded shaft 16 at the outer end of the shaft member 3 is coupled with a push plate. The arm 1 is slidingly advanced and retreated by the reciprocating motion of the advancing and retreating apparatus. When the arm 1 is slid, if it undergoes stronger resistance than predetermined force, the balls are pushed out of the grooves 4, the ring 8 is pushed back resisting the compressive force of the springs 5, and the balls 6 are put in between the rings 7 and 8, and as a result, the shaft member 3 is disengaged from the cylinder 2 to be set free, and the sliding motion is thus stopped immediately.

Description

[Detailed Description of the Invention] This invention provides a thrust system in which a pushing force or a pulling force is set, and when resistance exceeding the set force occurs, the transmission of the pushing force or pulling force is stopped. It concerns releasers.

For example, when an item is loaded to the unloading position by a single-feed conveyor and the stopped item is removed while being chipped out by a bushing device, the sliding of the item may be obstructed by some kind of shadow or - When the device is extended four times, the item may be damaged or the bushing device may malfunction.

Therefore, when the pressing force of the bushing device exceeds the setting,
This is detected by a detector and the stretching action of the bushing device is stopped.

With this type of safety device, there is a time lag between detecting resistance exceeding the set force that has occurred and stopping the operation of the bushing device, so it is necessary to stop the bushing device immediately. I can't do it.

Therefore, there were drawbacks such as damage to the product.

The object of the present invention is to eliminate the above-mentioned drawbacks by immediately stopping the slide when a resistance exceeding a specified pressure or traction force is generated.

In this invention, a telescopic arm is constructed of a cylinder body and a shaft member that are slidably fitted together, and a pole is fitted into four parts having inclined surfaces provided on the outer periphery of the paulownia, and a ball is inserted into a recessed part by a spring. When the thrust lever is pushed in and a resistance exceeding the force set by the spring occurs during suppression or traction, the four parts of the pole are released to immediately cut off the transmission of the set force and stop the slide. provide services.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a telescopic arm.

The above-mentioned telescopic arm 1 is composed of a cylindrical body 2 and a shaft member 3 whose opposing inner ends are slidably fitted together.

one! In addition, a four part 4 is provided on the outer periphery of the shaft member 3, and a bow) Vj3 is pushed into this recessed part 4 via a spring 5 with a set pressing force.

The method for pushing V6 (bo) above is as follows:
An annular groove for the recess 4 is provided on the outer periphery of the cylindrical body 2, and two rings 7.8 are fitted to the shaft member 8 so as to be located outside of this annular groove. A cylindrical body 1 with the outer surface of one ring 7 in contact with the annular protrusion 9, and screwed into the outer surface of the remaining ring 8 and the inner end of the cylindrical body 2.
A plurality of annular disk springs for the spring 5 are assembled between the rings 7 and 0, and a required number of bows are installed between the tapered surface portions 11 of the inner floors provided on the inner edges of the opposing surfaces of both rings 7 and 8. v(3), and if a resistance greater than the set force occurs,
The ring 8 is pushed back through the borer 6 pushed out from the recess 4, and the borer 6 is fitted between the two rings.

As shown in the figure, a cylinder 12 is provided at the outer end of the cylindrical body 2, and a piston extending from the shaft member 2 is installed in this cylinder 12, so that fluid is pressurized into the cylinder 12 from a port 14. By doing so, the shaft member 3 can be easily returned so that the ball 6 and the recess 4 match.

The pressing version shown in Figure 1 and the pulling version shown in Figure 3 were manufactured separately, but two recesses (not shown) were provided at one end of the shaft member 3 and in the middle, so that one unit could be made. It may be used for both pressing and traction purposes.

In the case of FIG. 1, one ring 7 is brought into contact with the cylindrical body 10, and the end of the spring 5 is brought into contact with the protrusion 9.

The thrust V reaser according to the present invention has the above-described configuration, and a telescopic device such as a cylinder (not shown) is attached to the outer end threaded shaft 15 of the cylindrical body 2, and a pusher is attached to the outer four threaded shafts 16 of the shaft member 3. Connect each.

Then, the arm 1 is slid forward and backward by the forward and backward movements of the extension and accommodation device.

However, when the above arm 1 slides and a resistance greater than psychokinesis is generated, the pole 6 is pushed out from the recess 4 and the ring 8'c is pressed while compressing the spring 5.
Since the pole 6 is pushed back and fitted between the rings 7 and 8, IIIllvf3 becomes free with respect to the cylindrical body 2.

In the case of pressing shown in FIG. 1, the state shown in FIG. 2 is obtained.

In the case of towing as shown in FIG. 3, the state shown in FIG. 4 is obtained.

As described above, the thrust releaser according to the present invention is
The opposing ends of the cylindrical body and shaft member are fitted together to form a telescoping arm, and the pole is pushed into the recess on the outer periphery of this shaft member via a spring adjusted to obtain a predetermined pressing force. When the resistance exceeds the set value due to the spring during towing, the pole can be pulled out from the four parts and the slide can be stopped immediately.

For this reason, when a resistance greater than the set force is applied, the resistance is increased suddenly, causing a delay in the conventional time when the suppression or traction device is stopped by a signal, which causes the pirate to malfunction. It can be eliminated.

[Brief explanation of the drawing]

The drawings show an embodiment of the thrust V reaser according to the present invention, and FIG. 1 is a longitudinal sectional side view of the thrust V reaser, FIG. 2 is a longitudinal sectional side view showing the same free state, and FIG. This is a longitudinal folded side view of a towed Suffustreaser.
FIG. 4 is a longitudinal sectional side view showing the free state of the same as above. 1... Telescopic arm, 2... Cylindrical body, 3... Shaft material, 4
... recess, 6... spring, 6... pole, 7
．． 8... Ring, 9... Projection, 10... Cylindrical body,
11... Tapered surface portion, 12... Cylinder, 13...
...Piston, 14...Port

Claims (1)

[Claims] The opposing inner ends of the cylinder and the shaft member are slidably fitted together] 1. A blue telescopic arm, four parts provided on the outer periphery of the shaft member, and a spring adjusted to obtain a predetermined pressing force. A thrust releaser consisting of a bold piece that is pushed into the recess.