JP2522694Y2 - Heavy object gripping and separating device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In the invention, a heavy object is suspended by holding a support shaft above the axis of the heavy object, and the heavy object is dropped by separating the heavy object. The present invention relates to a device for holding and separating an object.

[Prior Art] In a drop test in which a dropped object is dropped from a high place, the dropped object is held and supported by being held by a holding device, and is separated at a timing synchronized with another device at the time of separation.

Therefore, as shown in FIG. 3, a conventional dropping / gripping and separating device for a falling object is provided with a support shaft 2 at the upper end of the axis of the drop weight 1, and on both lower sides of the flange 3 of the support shaft 2. There is a configuration in which the distal end of the telescopic cylinder 4 with the extension is abutted to grip the support shaft 2, and the telescopic cylinder 4 is separated by contraction.

[Problem to be Solved by the Invention] By the way, when the above-described drop test is repeated many times, high-speed separation can be reproduced with high accuracy, and the accuracy of the separation timing and the static attitude of the falling object at the time of separation can be reduced. A device for holding and separating falling objects with good qualification is required.

However, in the conventional device shown in FIG.
Since it is very difficult to synchronously shrink the telescopic cylinders 4 with high precision, the shrinking timing of the two cylinders 4 is deviated at the time of separation, and the posture of the falling object 1 moves right and left as shown by a two-dot chain line in FIG. There is a problem that the static stability deteriorates due to swinging, and good static stability cannot be obtained. Further, since there is a limit to the expansion / contraction speed of the telescopic cylinder 4, there is also a problem in the speed of separation.

Then, an electric coil (not shown) is wound around the support shaft 2 so that high-speed separation can be reproduced with high precision, good static stability is maintained, and high-precision separation timing is obtained. And the support shaft 2 is cut off by burning.

In this device, if the weight of the fallen object 1 is less than 1 t, the diameter of the support shaft 2 is small so that high-speed separation with good reproducibility can be performed. Static determinism is obtained.

However, if the weight of the falling object 1 becomes large, for example, about 5 tons, the diameter of the support shaft 2 becomes large, and it is very difficult to cut it off by cutting it with an electric coil.
There is a problem that it cannot be used in a device for grasping and separating heavy objects, and a problem that the support shaft 2 must be replaced every time a test is performed in order to cut the support shaft 2.

The present invention was created in order to solve the above-mentioned problems, and when dropping a relatively heavy falling object, high-speed separation can be reproduced with high accuracy, and the separation timing and staticity of the falling object are improved. An object of the present invention is to provide a gripping and separating device for heavy objects that can be separated without cutting the support shaft, which is excellent.

[Means for Solving the Problems] In order to achieve the above object, the present invention grasps a support shaft provided above an axis of a heavy object for dropping, separates the supporting shaft, and drops the heavy object for dropping. In the gripping / separating device for heavy objects, a cylinder formed in a double cylindrical shape with an inner cylinder for inserting the support shaft to grip the support shaft and an outer cylinder surrounding the inner cylinder is provided. A pressure oil chamber is formed along the circumferential direction between the inner cylinder and the outer cylinder of the cylinder, and pressure oil supply means for supplying and discharging pressure oil to the pressure oil chamber is provided, and the inner cylinder grips the support shaft. The elastic tube formed of a thin metal material, which elastically deforms the portion with pressure oil supplied to the pressure oil chamber, holds the support shaft vertically, and separates the support shaft by discharging the support shaft. It is formed by.

[Operation] According to the above configuration, when suspending a heavy object for dropping,
It is sufficient to supply the pressure oil into the pressure oil chamber of the cylinder and hold the support shaft by the elastic deformation of the elastic tube.When separating, the pressure oil is discharged to restore the elastic deformation of the elastic tube and When the gripping force is released, the dropping heavy object falls with its support shaft being vertical.

The pressure oil supplied into the pressure oil chamber distributes the same pressure as the pressure of the pressure oil on the surface of the elastic tube, so that the elastic tube is uniformly elastically deformed. Therefore, the elastic tube can be gripped by uniformly applying the same gripping force along the outer peripheral surface of the support shaft.

In addition, when the pressure oil is discharged, the elastic deformation of the elastic tube is instantaneously restored and the gripping force is released uniformly, so that the heavy object for dropping can be separated in a short time while maintaining the posture.

As a result, even a heavy falling object can be grasped accurately, and can be separated by releasing the hydraulic pressure. Of the heavy object for dropping can be obtained.

Further, the support shaft can be separated without cutting.

Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of a gripping / separating device for heavy objects according to the present invention. In the figures, reference numeral 5 denotes a heavy object for dropping. The support shaft 6 is connected via a mounting flange 7. The supporting shaft 6 is provided with a cylinder 8 formed in a double cylindrical shape surrounding the holding position, and a pressure oil chamber 9 is formed in the cylinder 8 along the circumferential direction. A pressure oil supply / discharge means 10 for supplying / discharging pressure oil is provided in the pressure oil chamber 9.
Are connected.

As shown in FIG. 1, the pressurized oil supply / discharge means 10 is provided with a supply pump 12 for pressure-feeding the oil in an oil tank 11, and the supply pump 12 and the supply / discharge port 13 of the pressure oil chamber 9 are connected to each other. An electromagnetic switching valve 15 is provided in the middle of an oil passage 14 connecting the oil and oil. The oil in the oil tank 11 is pressure-fed by a supply pump 12 and supplied to the pressure oil chamber 9 via the electromagnetic switching valve 15. Together with an electromagnetic switching valve
With the switching operation of 15, the oil tank 11 passes through the oil passage 14 through the oil passage 16.
It is designed to be discharged inside. In the figure, 17 is a pressure regulating valve, and 18 is a check valve.

On the inner peripheral surface of the cylinder 8, there is provided an elastic tube which is elastically deformed by the pressure oil supplied to the pressure oil chamber 9, holds the support shaft 6 vertically, and separates the support shaft 6 by discharging. 19 are provided.

Specifically, as shown in the drawing, the cylinder 8 has an outer cylinder 20 formed of a metal material having a large plate thickness and a relatively high rigidity, and an inner cylinder 21 formed of a metal material having a lower rigidity than the outer cylinder 20. The outer cylinder 20 has a flange 22 formed along the circumferential direction on the outer periphery of the outer cylinder 20, and the cylinder 8 is fixed to the mounting base 23 via the flange 22. It has become. On the other hand, as shown, the inner cylinder 21 is
Are formed in a U-shape in cross section so as to form a space to be a pressure oil chamber 9 between them, and upper and lower end portions thereof are in liquid-tight contact with the inner peripheral surface of the outer cylinder 20 via a seal member 24. These outer cylinders 20
The upper and lower portions of the inner cylinder 21 are connected to each other by a ring-shaped lid member 26 attached thereto via mounting bolts 25.
The inner diameter of these lid members 26 is formed slightly larger than the outer diameter of the support shaft 6.

In addition, the inner cylinder 21 is formed to have a small thickness along a space portion that becomes the pressure oil chamber 9, and the thin portion has an elastic tube 19 elastically deformed by the pressure oil supplied to the pressure oil chamber 9. Has become.

 Next, the operation of the present embodiment will be described.

First, the cylinder 8 is fixed to the mounting base 23. When the heavy object for dropping 5 is gripped by the cylinder 8, the pressurized oil supply / discharge means 10 supplies the pressurized oil into the pressurized oil chamber 9, and The elastic tube 19 may be elastically deformed with pressurized oil and brought into contact with the outer peripheral surface of the support shaft 6 of the dropping weight 5. The electromagnetic switching valve 15 of the discharging means 10 is switched to discharge the pressure oil in the pressure oil chamber 9, and the elastic deformation of the elastic tube 19 is restored to release the gripping force.

At this time, when pressure oil is supplied into the pressure oil chamber 9, the pressure of the pressure oil is uniformly distributed on the surface of the elastic tube 19 at the same pressure. Since the distributed pressure uniformly elastically deforms the inner peripheral surface of the elastic tube 19, the same gripping force can be applied uniformly along the outer peripheral surface of the support shaft 6, and the gripping becomes accurate.

When the pressure oil in the pressure oil chamber 9 is discharged, the pressure acting on the elastic tube 19 is instantaneously reduced, and the gripping force for gripping the support shaft 6 is simultaneously and instantaneously lost, so that the separation is performed in a short time. Therefore, the dropping heavy object 3 falls while maintaining its posture. As described above, since the separation is performed by releasing the hydraulic pressure, high-speed separation can be reproduced with high accuracy, and good separation timing and stable fall can be obtained.

Further, since the support shaft 6 is not cut, the support shaft 6 is not replaced.

[Effects of the Invention] According to the present invention, a relatively large weight can be obtained by gripping the support shaft of a heavy object for dropping by the frictional force of an elastic tube formed of a thin metal, which is elastically deformed by pressurized oil. Can be gripped. In addition, since the support shaft of the heavy object for dropping is separated vertically by releasing the oil pressure while maintaining the vertical position, the good timing of separation by high-speed separation can be reproduced with high accuracy, and the posture of the heavy object for dropping is maintained. It can be dropped as it is. That is, an excellent effect is obtained that even when the heavy object for dropping is relatively heavy, the stabilization of the falling posture can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic overall view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a main part, and FIG. 3 is a schematic view showing a conventional example. In the figure, 5 is a heavy object for drop, 6 is a support shaft, 8 is a cylinder,
9 is a pressure oil chamber, 10 is a pressure oil supply / discharge means, 19 is an elastic tube, and 21 is an inner cylinder.

Claims (1)

(57) [Scope of request for utility model registration] An apparatus for gripping and separating a heavy object for gripping a support shaft provided above an axis of the heavy object for dropping and separating the heavy object for dropping. To provide a cylinder formed in a double cylindrical shape with an inner cylinder into which a support shaft is inserted and an outer cylinder surrounding the inner cylinder, pressure oil is provided along the circumferential direction between the inner cylinder and the outer cylinder of the cylinder. A pressure oil supply means for supplying and discharging pressure oil to the pressure oil chamber is provided, and the holding portion of the inner cylinder holding the support shaft is elastically deformed by the pressure oil supplied to the pressure oil chamber. A gripping / separating device for a heavy object, wherein the gripping / separating device is formed of an elastic tube made of a thin metal material, wherein the supporting shaft is gripped while being held vertically, and the supporting shaft is separated by discharging the supporting shaft.