JPS5848318Y2 - gripping device - Google Patents

Description

[Detailed description of the invention] This invention relates to a gripping device for gripping an object and hoisting it from an installation surface.

Conventionally, most gripping devices grasp and release an object by opening and closing a hook, and the operation of opening and closing the hook is performed by an electric device such as a motor or a solenoid, or a fluid device such as an air cylinder.

In addition, various interlock mechanisms are generally provided to prevent an accident in which the hook opens due to an erroneous operation while an object is being grasped and lifted, causing the object to fall off and fall.

Since such interlocking is generally performed by a sequence circuit, there are many problems with the reliability of the complicated sequence circuit, and there are also problems with the reliability of the electrical and fluid equipment itself incorporated into the gripping device.

In particular, in nuclear power-related equipment, in addition to the reliability of the constituent equipment and parts, it is necessary to give sufficient consideration to radioactivity, and there are also problems with restrictions on the materials used for electrical and fluid equipment. Ta.

This idea was created in consideration of the above, and it is intended to perform all hook operations and interlocks mechanically without using electrical equipment or fluid equipment. The object is to provide a gripping device with a locking mechanism.

For the above purpose, the gripping device of this invention is equipped with two ropes: a hanging rope for hoisting the device, and an operating rope for opening and closing the hook, and a sleeve that is moved by the operating rope to open and close the hook, and When a stopper having a piece that engages with the upper end and holds the hook in the open and closed states is pushed by a spring and is in the downward position, the stopper holds the hook in the open and closed positions and is in the upward position against the object to be lifted. The feature is that the hook can be opened and closed freely at any time.

This invention will be specifically explained below with reference to the illustrated embodiments.

As shown in FIG. 1, the gripping device 1 includes a hanging rope 2 for hanging it and an operating rope 3 for operating the hook, and the hanging rope 2 is wound around a winding drum 5 via a lifting pulley 4. Take it and raise and lower it, and the operating rope 3 is Boo'J6.
, 7, 8, and 9, and is wound up by a winding drum 10.

The gripping device 1 is suspended only by the hanging rope 2, and the operating rope 3
is maintained in a slack state, and the winding drums 5 and 10 are integrally constructed to wind and unwind the operating rope 3 and the hanging rope 2 at the same speed.

The boots IJ6, 7, and 8 constitute a device for applying tension to the operating rope 3, and can apply tension to the operating rope 3 by moving the pulley 7 from position A to position B in FIG.

As shown in FIGS. 2 to 4, the outer shell 11 of the gripping device 1 has a cylindrical shape, and a hanging rope 2 is attached to the upper end.

The outer shell 11 has a pair of hooks 1 in the middle in the vertical direction.
2 and 12 are pivoted by pivots 13 and 13 so as to be able to open and close, and a sleeve 14 is fitted so as to be slidable in the vertical direction.

The sleeve 14 is pushed downwards by a spring 15 mounted within the shell 11 and pulled upwards by the actuating rope 3, allowing it to move up and down within the shell.

When the sleeve 14 moves upward, the inner surface 14a of the upper end contacts the outer side 12a of the hook 12 above the pivot 13, pushes the upper end of the hook inward to open the hook 12, and when the sleeve 14 moves downward, the lower end The inner side 14b of the hook 12 contacts the outer side 12b of the portion below the pivot 13 of the hook 12 to push the hook inward and close the hook 12.

The outer shell 11 further supports the rod-shaped stopper 1 by an upper bearing portion 11a formed at its upper end and a lower bearing portion 11b formed at its lower end.
6 is supported so that it can slide downward along the -L line.

The stopper 16 has an enlarged diameter portion 17 at its lower end, and is provided with a piece 18 at its lower end that can engage with the upper end of the hook. It collides with the top of the object it grips, causing it to leak.

As will be described later, the piece 18 is located at the outer side 12 of the upper end of the hook 12.
The hook 12 has an inner surface 18a that can engage with the upper end of the hook 12, and an outer surface 18b that can abut the inner surface 12d of the upper end of the hook 12.

A spring 19 is attached to the lower bearing part 11b, and the lower end of the spring 19 is seated on the upper side of the enlarged diameter part 17, and the spring 19 is attached to the stopper 16.
acts to push downward.

In the next section G, the operation of the gripping device will be explained with reference to FIGS. 2-4.

As shown in FIG. 1, when the pulley 7 moves from position A to position B, the operating rope 3 is pulled upward.

As shown in FIG. 2, when the operating rope 3 is pulled upward, the sleeve 14 presses the spring 15 within the outer shell 11 and moves upward, causing the inner surface 14a of the upper end of the sleeve 14 to move outward of the hook 12. 12avc, and the outside 12a is the pivot 13
Being higher up, the top of the hook 12 is pushed inward and the hook opens.

At the same time, the stopper 16 is pushed by the spring 19 to the lowest position, and the inner surface 18a of the stopper piece 18 engages with the outer side 12c of the upper end of the hook 12, locking the hook in the open position.

Even if the operating rope 3 becomes loose for some reason, the spring 15 pushes the sleeve 14 downward, and the sleeve moves downward,
The movement of the sleeve 14 to close the hook into a gripping state is prevented by the stopper piece 18 locking the movement of the hook.

The winding drums 5 and 10 are rotated, the hanging rope 2 and the operating rope 3 are unwound, and the gripping device is lowered onto the object 20 to be gripped in the state shown in FIG.

When the enlarged diameter portion 17 at the lower end of the stopper 16 abuts against the object 20 and further descends, the spring 19 is compressed and the stopper 16 rises to the state shown in FIG. 3.

In this state, the stopper 16 rises and the piece 18 comes off the upper end of the hook, allowing the hook to pivot.

When the operating rope 3 is loosened (the pulley 7 is moved from the BQ position to the A position in FIG. 1), the spring 15 moves the sleeve 14 downward, and the inner surface 14b of the lower end of the sleeve 14 engages with the outer surface 12bK of the hook. , closes the hook and puts it in the grasp state.

In this way, the gripping device 1 grips the object 20.

In this state, the object 20 can be lifted by winding the hanging rope 2.

When the object 20 is lifted and leaves the installation surface 21, the enlarged diameter portion 17 at the lower end of the stopper 16 separates from the object, and the spring 19
pushes down the stopper, so the piece 18 also descends, and as shown in FIG. 4, the piece enters between the upper ends of the hook, and the outer surface 18b of the piece abuts the inner surface 12d of the hook, preventing the hook from pivoting. do.

Therefore, pull the actuating rope and move the sleeve upwards,
Even if the inner surface 14b of the lower end of the sleeve becomes detached from the hook outer surface 12b, the hook remains closed and retained, and the object will not come loose and fall.

According to this invention, as described above, when an object is grabbed and lifted, and when the object is released and only the gripping device is lifted, the piece 18 of the stopper 16 locks the hook 12, Since the movement is restricted, the opening and closing operations of the hook by the operating rope 3, i.e., the opening and closing operations, are performed only when the stopper 16 is moved (upward) by the object 20 and the hook can pivot. and grasping motion becomes possible.

Therefore, gripping and lifting operations can be performed reliably and safely using only a simple mechanical mechanism.

[Brief explanation of the drawing]

Fig. 1 is a side view schematically showing the configuration of a lifting mechanism using the gripping device of this invention; Figs. 2 to 4 are cross-sectional views showing one embodiment of the gripping device of this invention; Fig. 3 shows the talking state, Fig. 3 shows the grasping state, and Fig. 4 shows the lifting state. 1... Grasping device, 2... Hanging rope, 3...・・Operating rope, 4, 6, 7, 8, 9・・
... Pulley, 5゜10 ... Winding drum, 1
1...Outer shell body, 11a...Lower bearing part,
11b...Lower bearing part, 12...Hook, 12a12b...Outside of hook, 12c...
...Outside of the top end of the hook, 12d...Inside the top end of the hook, 13...Pivot, 14...
Three 7.14a...Top end inner surface, 14b...
...Lower end inner surface, 15...Spring, 16...
...Stopper, 17...Diameter enlarged portion, 18.
...piece, 18a...inner surface of piece, 18b,
・・・・Outer surface of the piece, 19・・・・Spring, 20・・
...Object, 21... Installation surface.

Claims (1)

[Scope of utility model registration request] An outer shell body in which a pair of hooks are pivoted so as to be openable and closable by an intermediate pivot, and a hanging rope is attached to the upper end, and a spring and an actuating rope that are slidably mounted inside this outer shell body and slide up and down. a sleeve whose inner surface engages with the outside of the hook to open and close the hook; a mechanism for applying upward tension to the operating rope; The upper end has a piece that engages on the outside above the pivot axis of the pair of hooks to hold the hook in an open state, and the piece that engages on the inside to hold the hook in a closed state, and the lower end engages with the object to be grabbed. A gripping device comprising a matable stop and a spring pushing the stop downward.