JPS6261513B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a lifting device that automatically attaches and detaches a hook when lifting or lowering an object, and is particularly suitable for transporting containers containing radioactive materials such as nuclear equipment that cannot be accessed by humans. This invention relates to an automatic hanging fixture useful for.

Generally, when an object is transported by a crane or the like, so-called hook sling work is performed manually. Furthermore, when an object is transported by a remotely controlled crane, a hanging ear through which the hook of the crane or the like is passed is fixed to the object, and the movement of the crane or the like is visually checked while the object is being operated. However, in these operations, 1
Since it requires ~2 workers, it requires a lot of work time and is uneconomical, and it is almost impossible to work in a place that cannot be seen. Furthermore, even if the automatic hanging fittings used in current nuclear power facilities can automatically hook and unhook, the weight of the object is placed on the pin that controls the hanging fitting. There are concerns about safety and reliability.

The present invention was proposed in view of the above-mentioned circumstances, and an object of the present invention is to provide a highly reliable automatic lifting device that automatically attaches and detaches a hook when lifting and lowering an object. The gist of this is that a cam fixed to the outer periphery of a shaft suspended by a crane, etc.
A cylindrical body formed on the outer peripheral surface of the cam and having a pin provided inside; a skirt part that is integrally formed with the shaft and provided on the outside of the cylindrical body and has a flange at the lower end of the outer periphery; and an outer periphery of the skirt part. a main body frame fitted to the main body frame so as to be slidable in the vertical direction; at least two claw members rotatably and equidistantly pivoted inside the main body frame; and a connecting member having at one end a swing pin that slides in an elongated hole provided in the pawl member, and the pin formed on the cam is slidably fitted and the pin is moved by vertical movement of the shaft. It is characterized by comprising a continuous curved groove that is guided only in one continuous direction and allows the swinging pin of the cylindrical body to open and close the claw member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic hanging fixture according to the present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 is a half-sectional view of the automatic hanging fitting according to the present invention, and shows a shaft 1 suspended by a crane or the like.
and a cam 2 fixed to the outer periphery of this shaft 1.
, a cylindrical body 5 having a pin 4 formed on the outer peripheral surface of the cam 2 and guided by a continuous predetermined curved groove 3 on the inside; A skirt portion 6 having a flange 6a at the lower end of the outer periphery, a main body frame 7 fitted to the outer periphery of the skirt portion 6 so as to be slidable in the vertical direction, and the main body frame 7
at least two claw members 10 rotatably and equidistantly supported on the inside of the cylinder body 5; and an elongated hole 1 fixed to the lower end of the outer circumference of the cylindrical body 5 and provided in the claw members 10.
0a, and a connecting member 8 having a swing pin 9 at one end.

The curved groove 3 of the cam 2 fixed to the outer periphery of the shaft 1 is formed as shown in the developed view in FIG. It is a continuous predetermined curved groove that repeats the movement from point to point and back to the point. Also, pin 4
The curved groove 3 is formed so that it moves only in the direction of the arrow within the curved groove 3, and never in the opposite direction. Therefore, when the shaft 1 is lifted by a crane or the like, the cylindrical body 5 and the main body frame 7 descend due to their own weight, so the cylindrical body 5 is guided by the pin 4 and positioned at either the above point or the point. The main body frame 7 comes into contact with the collar 6a of the skirt portion 6 which is integrally fixed to the shaft 1 and stops. At this time, the claw member 10 swings around the swing pin 9 as the main body frame 7 moves up and down, and the hook-shaped hook 10b at the tip closes inward or opens outward. .

On the other hand, at the upper end of the object 21 to be lifted and transported by the automatic lifting device according to the present invention,
An annular lifting part 22 with an engaging part 22a provided on the inside is fixed, and is lifted from the inside by hook-shaped hooks 10b of at least two claw members 10 attached to the main body frame 7 of the automatic lifting fitting. It's starting to get hooked.

To explain the operation of lifting and lowering the object 20 to be lifted by the automatic lifting fitting configured in this way, first, in a normal state where the shaft 1 of the automatic lifting fitting is lifted by a crane or the like, as shown in FIG. 1a, , the cylindrical body 5 and the main body frame 7 are lowered by their own weight, the pin 4 of the cylindrical body 5 is located at the point of the curved groove 3 of the cam 2, and the claw member 10 pivotally supported on the main body frame 7 is moved downwards by the cylindrical body 5. Connecting member 8 integrated with
As a result of the pin 9 trying to push up the elongated hole 10a of the claw member 10, it is closed inward. In this state, when the hanging fitting is moved and the claw member 10 is accurately landed on the upper surface of the object to be lifted 21, and the entire weight of the hanging fitting is applied to the object to be lifted 20,
The cylindrical body integrated with the pin 4 is pushed up, but since the pin 4 moves from point to point in the curved groove 3, as shown in FIG. The claw member 1 is in contact with the lower end of the
0 opens outward, and the hook-shaped hook 10b is in a state where it can engage with the engaging portion 22a of the lifting portion 22 provided at the upper end of the object 21 to be lifted.

Next, start lifting the hanging bracket, and lift the shaft 1.
When the cam 2 rises, the relationship between the cam 2 and the pin 4 changes from the point in Figure 2 to the point, and when it reaches this point, it becomes integral with the shaft 1 as shown in Figure 1c. The main body frame 7 comes into contact with a flange 6a provided on the skirt portion 6, and the hanging fitting is lifted up. In this state, the cylindrical body 5 remains the same as in FIG. 1b even if the pin 4 moves from the position
The claw member 10 remains open and can lift the object 21 to be lifted. However, the object to be lifted 21 is superimposed from the main body frame 7 to the skirt portion 6.
to directly join the shaft 1 via the pawl member 1
Almost no load is applied to the pin 4 that controls the opening and closing of 0.

The object to be lifted 21 that has been transported to a predetermined position will finally be lowered, but when lowering the object to be lifted, after the object to be lifted 21 has landed, the lifting fittings are lowered and the shaft 1 and cam 2 are further lowered. If the cam 2 and the pin 4 are lowered a little, the relationship between the cam 2 and the pin 4 changes from the point to the point shown in FIG. 2, and at this point the entire weight is released from the hanging fitting. When the hanging fitting is lifted, the shaft 1 and the cam 2 begin to rise, and the relationship between the cam 2 and the pin 4 returns from the point in FIG. The swing pin 9 rises and the claw member 1
0 inward, and the engaging portion 2 of the lifted object 21
The hook-shaped hook 10b is now detached from the hook 2a. Therefore, by repeating the above operations, lifting, transporting, and lowering of the object 21 to be lifted is automatically performed.

As described above in detail based on the embodiment shown in the drawings, the automatic lifting fixture according to the present invention has a curved groove in the cam that controls the opening/closing of the claw member that is engaged with and disengaged from the lifting part of the object to be lifted. In addition to using a positive cam consisting of A hanging fitting with high quality can be obtained.

Further, since a positive cam having a curved groove is used as the cam for controlling the opening and closing of the pawl member, the operation is simple and reliable operation is maintained without malfunction. Therefore, by using the automatic hoisting fitting according to the present invention, it is possible to perform remote operation in invisible places as well as safe work in nuclear facilities etc. that are inaccessible to humans, thereby providing a labor-saving automatic hoisting fitting. can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a half sectional view showing an embodiment of the automatic hanging fitting according to the present invention, a to c shows the procedure of its operation, and Fig. 2 is a developed explanation of the cam showing the relationship between the cam and the pin according to the present invention. It is a diagram. In the drawing, 1 is a shaft, 2 is a cam, 3 is a curved groove, 4 is a pin, 5 is a cylindrical body, 6 is a skirt part, 6
a is a collar, 7 is a main body frame, 8 is a connecting member, 9 is a swing pin, 10 is a claw member, 10a is an elongated hole, 10b is a hook-shaped hook, 21 is an object to be lifted, 22 is an engaging part,
22a is a lifting part.

Claims (1)

[Claims] 1. A cam fixed to the outer periphery of a shaft suspended by a crane, etc.; a cylindrical body formed on the outer periphery of the cam with a pin provided inside; a skirt portion provided with a flange at the lower end of its outer periphery; a main body frame fitted to the outer periphery of the skirt portion so as to be slidable in the vertical direction; at least two claw members, a connecting member fixed to the lower end of the outer periphery of the cylindrical body and having at one end a swing pin that slides in an elongated hole provided in the claw member; A continuous curve in which a pin is slidably fitted and the pin is guided only in one continuous direction by the vertical movement of the shaft so that the swinging pin of the cylindrical body can open and close the claw member. An automatic hanging fixture characterized by comprising a groove.