JPH062294U - Stopper device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a stopper device that protrudes into a passage of a moving object and serves to hold the movement of the moving object, and relates to a pressure source for operation and a pipe for guiding the pressure source. It is an object of the present invention to provide a stopper device that does not require a class and can be operated easily and reliably by remote control. [Structure] A cylinder rod 1 for vertically moving a basket 2 in a cleaning tank 3 is operated by water pressure introduced from a water pressure unit 4 to a piston 5. The cylinder rod 1 is held in its raised position by a stopper shaft protruding from the stopper device 12. The stopper device 12 is configured such that the manipulator 13 outside the cell rotates the lever 90 ° between the fitted position and the disengaged position to retract the stopper shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stopper device that projects into a passage of a moving object and holds the moving object therein.

[0002]

[Prior art]

 As an example of a conventional stopper device, a stopper device for a lifting basket in an endosynic acid / water cleaning tank installed in a dissolving process of a reprocessing facility will be described with reference to FIG. The basket lifting mechanism and stopper device of the end piece acid / water cleaning tank shown in FIG. 4 use water pressure as a drive source.

In order to vertically move the basket 2 attached to the lower end of the cylinder rod 1 in the cleaning tank 3, the water pressure from the water pressure unit 4 is applied to the front surface or the back surface of the piston 5 in the cylinder rod 1 through the water pressure conduit 6. Guide selectively. In this device, when the drive mechanism of the basket 2 is opened, the cylinder rod 1 may be damaged if the hydraulic cylinder rod 1 is hoisted while being fully extended.

Accordingly, the work can be facilitated by shortening the total length of the suspended object while the cylinder rod 1 is suspended to the highest position. In order to suspend the cylinder rod 1 at the uppermost stage, the hydraulic cylinder rod 1 will fall naturally unless there is a stopper device that holds the cylinder rod 1 in the raised position. A cylinder lock mechanism 7 is provided for this purpose.

Since the end piece is a radioactive object, the elevating mechanism for the cleaning tank 3 and the basket 2 and the like are inside a cell surrounded by a wall in a radioactive environment. Therefore, the cylinder lock mechanism 7 is currently a lock mechanism that uses the hydraulic unit 4 (or air unit) from outside the cell as a pressure source to move the shaft 8 into and out of the passage of the cylinder rod 1, and as shown in FIG. It has a fitting mechanism for preventing the rod 1 from falling and a releasing mechanism for freely moving the hydraulic cylinder rod.

In the conventional stopper mechanism, the working pressure for the cylinder of the lock mechanism 7 is supplied by the pipe 9 guided from the pressure source unit outside the cell. Therefore, a pressure source unit is needed outside the cell. When the water pressure unit 4 of the lifting mechanism is used as a common supply source, the pressure reducing device 10 for reducing the pressure to the required pressure is required. If another air source is used, a separate unit is of course required.

When exchanging the hydraulic cylinder of the lifting mechanism, a disconnecting device 11 for these pipes (with a non-return function at the time of removal) is required, and there is no leakage from the pipe connection part. There was a defect that the work was extremely complicated.

[0008]

[Problems to be solved by the device]

 INDUSTRIAL APPLICABILITY The present invention does not require a pressure source or pipes for operation as found in the above-mentioned conventional stopper device, and when used as a stopper device for equipment handling radioactive substances, the operating pressure It is an object of the present invention to provide a stopper device that has no possibility that the liquid or the like used as such will flow out to the outside.

Further, the present invention provides a stopper device which is adopted as a stopper device for a device used in a radioactive atmosphere or the like and can be operated easily and reliably even by remote operation when it is not easily approached. It is an issue.

[0010]

[Means for Solving the Problems]

 The present invention provides a mechanical stopper device which employs a sliding shaft having a stopper shaft attached thereto and having an elongated cam hole, and a rotatable lever shaft having a rotating pin fitted in the cam hole of the sliding shaft. .

The stopper shaft is biased by a spring in the direction of pulling back from the passage of the moving object, and the rotary pin is displaced by the mere rotation operation of the lever shaft described above, and the cam hole in a fitting relation with the rotary pin. The sliding shaft with is moved so that the stopper shaft is projected to the operating position.

[0012]

[Action]

 According to the present invention, when the lever shaft is rotated by a simple operation of raising or pulling the lever, the rotation causes the rotation pin to be displaced. Since the rotary pin of the lever shaft is fitted in the cam hole of the sliding shaft, the sliding shaft is displaced by the displacement of the rotary pin. Therefore, the stopper shaft attached to the sliding shaft is moved and projected into the passage of the moving object to hold the moving object at that position.

When the lever shaft is rotated in the original direction, the spring urging the stopper shaft in the pulling back direction pulls the stopper shaft back to the non-operating position. As described above, since the device according to the present invention operates by merely giving a rotational motion to the lever shaft, it can be easily operated by remote operation with a hand or the like of the power manipulator.

[0014]

【Example】

 Hereinafter, one embodiment of the device according to the present invention will be described in detail with reference to FIGS. The embodiment shown in FIGS. 1 to 3 is similar to the embodiment shown in FIG. 4 in that the present invention is applied to the stopper device for the lifting basket in the acid / water washing tank of the end piece. The same parts as those of the conventional device are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, the stopper device 12 has a manipulator 13 for determining whether the stopper shaft is projected so as to hold the movement of the cylinder rod 1 or the disengaged position where the stopper shaft is pulled back and does not engage with the cylinder rod 1. It can be removed by operating the lever at 90 °.

The structure of the stopper device 12 is shown in FIGS. The stopper device includes a stopper shaft 21, a sliding shaft 22, a spring 23, a bush 24, a main body 25, a lid 26, an adjusting screw 27, a lever shaft 28, a rotating pin 29, a lever 30, a lever shaft retainer 31, and a cam hole 32. It is composed of.

When the lever 30 is rotated in the direction of the arrow in FIG. 2, the sliding pin 22 moves to the right (detach side) by the rotation pin 29 moving with the cam hole 32 of the sliding shaft 22 guided. When the lever 30 is rotated 90 °, the sliding shaft 22 moves by 15 _mm as a stroke. The length of the stroke can be freely determined by the distance between the center of the lever 30 and the rotating pin 29.

A force for actuating the stopper shaft 21 on the releasing side is exerted by the spring 23, so that the stopper shaft 21 reliably maintains the releasing position during normal operation of the cylinder rod 1 shown in FIG. In the “fitted” state of the stopper shaft 21, the maximum compressive load of the spring 23 acts on the rotating pin 29, but since the force acts vertically on the rotating pin 29, the lever shaft 28 does not rotate. . Therefore, it is kept in that "fit" state.

Every time the lever 30 is rotated 90 ° by the manipulator 13 or returned, the lock mechanism can be controlled to be fitted / disengaged by the stopper shaft 21. When assembling this stopper device, in order to insert the rotating pin 29 of the lever shaft 28 into the sliding shaft 22, the screw of the adjusting screw 27 is used, and the length of the adjusting screw has a stroke of 15 _mm or more. Screw in a provisional bolt with a length equal to the length shown in the figure, and push in the spring 23 until the state shown in the figure. Insert the lever shaft 28 with the cam hole 32 and the pin with lever shaft 29 aligned, and insert the lever shaft retainer 31. Tighten with screws.

After that, the lever 30 is screwed into the lever shaft 28, the surface clearance between the lever shaft 28 and the lever shaft retainer 31 is adjusted by tightening the lever 30, and the lever shaft 28 can be rotated by turning the lever 30. be able to.

Although the present invention has been specifically described based on the illustrated embodiments, it goes without saying that the structure of the specific device described above may be variously modified within the scope of the present invention. For example, the shape and position of the cam hole of the sliding shaft 28, the mounting mode of the lever shaft 28, and the insertion position of the spring 23 can be variously changed. The point is that the sliding shaft 22 is displaced by the rotation of the lever shaft 28 via the rotating pin 29 and the stopper shaft 21 is moved.

[0022]

[Effect of device]

 In the present invention, since fluid pressure is not used to displace the stopper shaft, unlike the conventional case, it is not necessary to run the pipe from the operating pressure source outside the cell, and leakage from the joint part of the pipe can be prevented. There is no need to consider. In addition, when replacing the hydraulic device for raising and lowering the cleaning tank basket, it is not necessary to remove the pipes that were conventionally provided to operate the stopper device.

According to the present invention, the sliding shaft engaging with the rotating pin is displaced by a simple mechanical operation of merely pulling or raising the lever to rotate the lever shaft. Since the stopper shaft is retracted, remote operation is easy and the operation is reliable.

[Brief description of drawings]

FIG. 1 is a side view showing, in a partial cross section, a configuration of a cleaning device adopting a stopper device according to the present invention.

FIG. 2 is a side sectional view of an embodiment of a stopper device according to the present invention.

FIG. 3 is a plan sectional view of the device shown in FIG.

FIG. 4 is a side view showing a partial cross-sectional view of a cleaning device showing an example of use of a conventional stopper device.

[Explanation of symbols]

 1 Cylinder Rod 2 Basket 3 Cleaning Tank 4 Water Pressure Unit 5 Piston 12 Stopper Device 13 Manipulator 21 Stopper Shaft 22 Sliding Shaft 23 Spring 25 Main Body 28 Lever Shaft 29 Rotating Pin 30 Lever 31 Lever Shaft Press 32 Cam Hole

Claims (1)

[Scope of utility model registration request] 1. A stopper shaft projecting into a passage of a moving object and holding the moving object, a spring for applying an urging force in the pullback direction to the stopper shaft, and an elongated cam hole which is slidable in the main body to which the stopper shaft is attached. A cam having a sliding shaft having a lever, a lever shaft rotatably held in the main body and having a rotation pin fitted in the cam hole, and a lever for rotating the lever shaft, and the rotation of the lever shaft causes the cam to rotate. A stopper device, wherein the stopper shaft is moved by the displacement of the sliding shaft caused by the displacement of the rotary pin in the hole.