JPH0592889A - Drum can carrier - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] It is possible to omit the power for gripping the drum, and to improve the reliability and safety during lifting work. A hoisting means 2 mounted on a traveling means 1, a hoisting frame 3 hung by a wire rope on the hoisting means, a drum can gripping arm 4 movably supported by the hoisting frame and holding a drum can, An elastic member 5 for moving the drum can gripping arm outward by elastic force, a gripping force generating means 6 for moving the drum can gripping arm radially inward when tension of the wire rope is generated, and a drum can when the drum can is not hung. And a movement restraint means 7 for stopping the gripping arm at the outer position. When tension acts on the wire rope, the drum can gripping arm moves inward and grips the drum can.
When the tension of the wire rope is removed, the drum can gripping arm moves outward and stands by.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum can conveying device, and more particularly to a drum can conveying device while holding the drum can while holding it.

[0002]

2. Description of the Related Art Hazardous substances and the like handled in nuclear power generation related plants, thermal power generation plants, related plants, chemical plants, etc. are transported in a sealed state in a drum can.

Due to the nature of the filling material, it is desirable to carry out the conveying operation of the drum can (hereinafter abbreviated as "drum can") filled with the harmful substances.

Conventionally, in a conveying device for a drum can, a gripping claw or the like which is operated to be opened and closed by an electric motor or an air cylinder has been used in a suspending part for suspending the drum can. I try to grab a drum and hang it up.

[0005]

However, there are various problems in terms of safety when driven by either electric or air cylinders. In other words, if the former is used to grip the drum by electric power, there is a risk of dropping the drum in a grip release state in the unlikely event of a power failure. There is a risk that the drum can will be dropped.

The present invention has been made in view of such circumstances, and (1) it is possible to omit the power for gripping the drum can, (2) improve the safety during the lifting operation, etc. The purpose is.

[0007]

According to the present invention, in order to solve the above problems, a traveling means for horizontally moving a traveling track, a hoisting means mounted on the traveling means, and a wire rope for the hoisting means. A suspension frame that is suspended,
A drum can gripping arm that is supported movably in the radial direction with respect to the suspension frame and clamps the drum can; and an elastic member that is arranged on the suspension frame and that constantly moves the drum can gripping arm outward in the radial direction by elastic force, Gripping force generating means arranged in an intervening state between the hanging frame and the drum can gripping arm to move the drum can gripping arm radially inwardly against the elastic force when the tension of the wire rope is generated by the winding means, The drum can conveying device is provided with a movement restraining means which is arranged on the suspension frame and stops the drum can gripping arm at the radially outer position when the drum can is not suspended.

[0008]

With the traveling of the traveling means, the suspension frame or the like suspended by the winding means is conveyed to the target position. When the drum can is not suspended, the movement holding means keeps the drum can gripping arm in a radially outward position. When suspending the drum can, with the drum can gripping arm set at a position above the drum can, the movement restraint means releases the movement restraint and the winding means is actuated to start winding the wire rope. When tension is generated in the wire rope, this tension causes the drum can gripping arm to move inward in the radial direction against the elastic force of the elastic member and contact the surface of the drum can. Weight support is performed. As the weight of the drum can is supported, the tension of the wire rope increases, and the frictional force at the contact portion increases, which improves the safety when the drum can is suspended. When the tension of the wire rope becomes small by hanging the drum can, etc., the elastic force of the elastic member exceeds the moving force inward in the radial direction due to the tension to move the drum can gripping arm outward in the radial direction, The grip of the drum can is released.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the drum can conveying device according to the present invention will be described below with reference to the drawings.

In these figures, R is a running track, 1
Is a traveling means, 2 is a winding means, 3 is a suspension frame, 4 is a drum can gripping arm, 5 is an elastic member, 6 is a gripping force generating means, and 7 is a movement restraining means.

The traveling means 1 comprises a traveling platform 11 for horizontally moving a monorail traveling track R, a traveling drive source 12 for traveling along the traveling track R, a power feeding device, a remote control device and the like. It is supposed to be installed.

The hoisting means 2 is mounted on the traveling base 11 of the traveling means 1, and is provided with a hoisting drive source 21, a speed reducing mechanism 22 for decelerating the rotation of the hoisting drive source 21 and distributing a rotational force, and the speed reducing mechanism. A winding drum 23 that is connected to 22 and is rotated synchronously; a wire rope 24 that is wound by the winding drum 23; and a wire rope 2
4 fixed ends 25 and the like.

The suspension frame 3 includes pulleys 61 to 66 which will be described later by the wire rope 24 of the winding means 2.
As shown in FIG. 1, the structure is formed into a substantially cruciform structure, and a support rail 31 for supporting the drum can gripping arm 4 is disposed in a part of the structure, and Further, a holding frame 32 for temporarily placing it on the drum can X and releasing the grip by the grip force generating means 6 is integrally arranged.

The drum can gripping arms 4 are movably supported at four positions on the suspension frame 3 in a radial direction, and clamp the drum can X when moving inward in the radial direction. Moving block 41 that is movably supported by the supporting rails 31, an arm portion 42 that is integrally hung on the moving block 41, and friction contact with the surface of the drum can X that is mounted inside the arm portion 42. Pad 43, a hollow portion 44 provided in the arm portion 42 in the longitudinal direction thereof, and a touch sensor 45 attached to the pad 43 portion through which a lead wire is guided through the hollow portion 44. ..

The elastic member 5 is a coil spring or the like arranged in a state of being interposed between the suspension frame 3 and the drum can gripping arm 4, and its elastic force always keeps the drum can gripping arm 4 outward in the radial direction. It is to move toward.

The gripping force generating means 6 is for moving the drum can gripping arm 4 inward in the radial direction by the tension of the wire rope 24 by the winding means 2. Frame 3
Guide pulley 61 to guide pulley 6 arranged in the
5 and a moving pulley 66 arranged on the moving block 41
And the wire rope 24 wound around each of the pulleys 61 to 66 and the moving block 41.

The movement restraint means 7 has a structure in which a ball nut mechanism consisting of a screw portion 71 and a ball nut portion 72 and a brake mechanism 73 are combined. In the ball nut mechanism, both ends of the screw portion 71 are rotatably attached to the lower position of the suspension frame 3, and the intermediate portion of the screw portion 71 is integrated with the moving block 41.
The moving block 41 is allowed to move in the radial direction by rotating the screw part 71 in a state of being screwed with the brake mechanism 73, and the brake mechanism 73 causes the end part of the screw part 71 in the ball nut mechanism and the suspension frame 3 to move. It is arranged in a state of being interposed between and, and prevents the movement of the moving block 41 by blocking the rotation of the screw portion 71. A stopper that mechanically limits the outward movement of the moving block 41 is arranged at the radial end of the suspension frame 3.

In the drum can conveying device having such a structure, when the wire rope 24 in the winding means 2 is not tensioned, that is, when the weight of the drum can X and the suspension frame 3 is not applied, The moving block 41 is pushed outward based on the elastic force of the elastic member 5, and the interval between the drum can gripping arms 4 increases. In this case, the movement of the drum can gripping arm 4 is performed gently and smoothly by allowing the ball nut mechanism to rotate.

In the movement restraining means 7, the movement of the moving block 41 is hindered by blocking the rotation of the screw portion 71 of the ball nut mechanism. Is operated in the maximum state, and the drum can gripping arm 4 is held in the expanded state. Therefore, when the weight of the drum can X is not supported, the movement restraining means 7 is operated and released.

Further, in the gripping force generating means 6, when the suspension frame 3 and the drum can X are suspended by the wire rope 24 to generate tension, the moving pulley 66 is driven inward together with the moving block 41. As a result, the distance between the drum can gripping arms 4 is narrowed.

Therefore, when the drum can X is hung and conveyed to the target position and released, the traveling means 1 is operated to cause the traveling base 11 to travel directly above the drum can X. The suspension frame 3 is lowered by the operation of the hoisting means 2, and the holding frame 32 incorporating the touch sensor 46 is landed on the drum can X as shown in FIG. 1 to release the tension of the wire rope 24. At the same time, the operation of the movement restraining means 7 is released in a state where each drum can gripping arm 4 is positioned around the drum can X. The touch sensor 4 detects the contact state between the presser frame 32 and the drum can X.
6 is detected. Then, the winding of the wire rope 24 by the winding means 2 is started, and the wire rope 2
When a tension is generated in 4, the inward moving force due to the tension becomes larger than the elastic force of the elastic member 5, and the moving block 41
Is moved inwardly so that each drum can gripping arm 4 contacts the surface of the drum can X and grips it. The contact state between each drum can gripping arm 4 and the drum can X is detected by the touch sensor 45.

When the winding amount of the wire rope 24 by the winding means 2 increases, the total load of the drum can X is gradually applied, and the increase in the tension of the wire rope 24 increases the gripping force of the drum can X by the drum can gripping arm 4. Directly connected to the increase, the weight of the drum can is supported by the frictional force of the contact portion. In this case, the larger the supporting weight is, the larger the tension of the wire rope 24 is, the more the frictional force at the contact portion is increased, and the higher the safety in suspending the drum can X is.

When the drum can X thus suspended is conveyed to the target position and then the drum can X is hung down to reduce the supporting weight of the drum can X, the tension of the wire rope 24 is reduced in proportion thereto. In this case, when the pressing frame 32 is temporarily placed on the drum can X and the tension of the wire rope 24 is remarkably reduced, the moving block 41 is pushed outward by the elastic force of the elastic member 5. , The drum can gripping arm 4 is widened to increase the drum can X.
Is released.

With the drum can gripping arm 4 spread out, the movement restraining means 7 is operated, and thereafter, the lifting frame 3 is raised and the work is continued.

The present invention includes the following technical configurations. (1) In the example of FIG. 1 and the like, one winding drum 23 drives the gripping force generating means 6 at two locations, but the number of winding drums 23 may be set arbitrarily. (2) The number of gripping force generating means 6, that is, the number of grip points is three or more. (3) The traveling means 1 is not a monorail type. (4) The hanging frame 3 has an arbitrary shape other than the cross shape. (5) The movement restraint means 7 has a combined structure other than the ball nut mechanism and the brake mechanism 73.

[0026]

According to the drum can conveying device of the present invention, the following effects can be obtained. (1) Since the driving of the drum can gripping arm for gripping the drum can in the gripping direction is performed by the tension of the wire rope of the winding means, it is possible to use the same driving source for gripping the drum can and omit the power. In addition, since there is no dedicated drive device for gripping the drum, the cause of failure is removed and safety is improved. (2) Since the gripping force is generated at the same time when the drum can is hung, and the gripping force increases with an increase in the load, it is possible to secure the hanging work of the drum can and improve the safety. (3) By providing the movement restraining means for stopping the drum can gripping arm at the outer position, the drum can gripping and releasing of the drum can can be reliably and efficiently performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a drum can conveying device according to the present invention.

FIG. 2 is a front view of a main part showing an embodiment of the drum can conveying device according to the present invention.

FIG. 3 is a side view of essential parts showing an embodiment of a drum can conveying device according to the present invention.

FIG. 4 is a front view showing the structure of an elastic member, a gripping force generating means, and a movement restraining means in FIG.

5 is a plan view showing a suspension frame portion in FIG. 1. FIG.

[Explanation of symbols]

 R Traveling track 1 Traveling means 2 Hoisting means 3 Suspending frame 4 Drum can gripping arm 5 Elastic member 6 Gripping force generating means 7 Movement restraining means 11 Traveling cradle 12 Traveling drive source 21 Winding drive source 22 Reduction mechanism 23 Winding drum 24 Wire rope 25 Fixed end 31 Support rail 32 Holding frame 41 Moving block 42 Arm part 43 Pad 44 Hollow part 45 Touch sensor 46 Touch sensor 61-65 Guide pulley 66 Moving pulley 71 Screw part 72 Ball nut part 73 Brake mechanism X Drum can

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B66C 17/04 8611-3F

Claims (1)

[Claims] 1. A traveling means (1) for horizontally moving on a traveling track (R), and a hoisting means (2) mounted on the traveling means.
A suspension frame (3) suspended by a wire rope (24) on the hoisting means, and a drum can gripping arm (4) for movably supporting the suspension frame in a radial direction and sandwiching the drum can (X). ), And an elastic member (5) which is arranged on the suspension frame and always moves the drum can holding arm outward in the radial direction by an elastic force, and is arranged in an interposing state between the suspension frame and the drum can holding arm and is wound up. A gripping force generating means (6) for moving the drum can gripping arm inward in the radial direction against the elastic force when the tension of the wire rope is generated by the means; And a movement restraining means (7) for stopping the arm in a radial outward position.