JPH0521833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting and conveying device for cylindrical graphite electrodes, and more specifically, in a state in which cylindrical graphite electrodes are stacked in multiple stages vertically and horizontally, a long object is lifted from the upper stage. To provide a conveyance device that can sequentially extract one electrode at a time and lift it up and convey it, and can also securely grip even a fragile graphite electrode and lift it up and convey it without being destroyed.

Graphite electrodes are long and cylindrical, and these graphite electrodes are stored vertically, horizontally, and vertically in stacks. From this stacked graphite electrode,
When using desired graphite electrodes, the graphite electrodes are extracted one by one from the upper stage and transported to a predetermined location. This extraction and conveyance work is usually done manually. However, graphite electrodes are heavy and fragile, and this work is complicated and extremely dangerous, so improvements are needed.

That is, even if the topmost graphite electrode is desired among the graphite electrodes stacked in multiple stages, there is almost no space between the two sides of the elongated graphite electrode.
For this reason, when lifting, the objects on both sides of the graphite electrode are moved to form a gap, and then the graphite electrode to be lifted is fitted with a crowbar or the like to float the lower part, and this gap is created by moving the objects on both sides of the graphite electrode. A wire is inserted and the graphite electrode is suspended and transported by the wire.
This work is carried out in extremely poor footing, is dangerous, extremely hard work, and requires a large number of workers. In addition, the graphite electrode itself is fragile and the end face can be damaged when handled as described above.
Even if the degree of damage is slight, the resistance changes at the end face during use, causing a major hindrance to the operation of the electric furnace.

The present invention was established in response to this request for streamlining the work. Specifically, it is possible to automatically lift and transport graphite electrodes safely and easily with a very small number of people, and also to make it possible to lift and transport graphite electrodes, for example, during this time. To propose a lifting and conveying device capable of gripping even such a fragile object reliably and without being destroyed.

That is, in the device according to the present invention, one gripping arm that is supposed to grip one end of a cylindrical graphite electrode is fixed to one end of the suspender body, while the other gripping arm that is supposed to grip the other end of the graphite electrode is fixed to the other gripping arm that is supposed to grip the other end of the graphite electrode. In a lifting conveyance device, the other gripping arm is fitted with a locking device that locks by engaging with an alignment groove formed in the hoist body, and the other gripping arm is movably disposed on the hoist body. , side receiving claws are formed on each opposing surface of the tips of both gripping arms on both sides, sandwiching the center receiving claw provided at the lowest end, and the center receiving claws on each of these opposing surfaces as well as the two
Two side receiving claws support both ends of the graphite electrode upward from below, and a plurality of rollers are attached to the lower surface of the suspender body to press downward the graphite electrode supported upward, and these rollers It is characterized by being in rolling contact with.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are a front view and a side view showing a suspended state of graphite electrodes of a conveying device according to an embodiment of the present invention, and FIG. 3 is a view taken along arrow A-A in FIG. FIG. 4 is an explanatory diagram of an example of the locking mechanism of the gripping arm.

First, in FIG. 1, the reference numeral 1 indicates, for example, an artificial graphite electrode (hereinafter simply referred to as an electrode), and when this electrode 1 is transported and lifted, the lifting tool main body 2 is arranged as shown in FIG. A pair of gripping arms 3a and 3b are provided so as to project downward from the lower side of the suspension main body 2. These gripping arms 3a, 3b are, for example, as shown in FIG.
One gripping arm 3a is fixed to one end of the sling main body 2, while the other gripping arm 3b only moves along the lower surface of the sling main body 2.
Attach to.

That is, as shown in FIGS. 1 and 4,
One gripping arm 3a is fixed to one end of the suspension main body 2, and the upper part of the other gripping arm 3b is movably attached to the suspension main body 2 via a locking device 4. This locking device 4 comprises a mounting member 5, a rolling roller 6, a projection 7, a lever 8 and a locking pin 9. The mounting member 5 is configured to surround the hanger main body 2 from the outer periphery, and a rolling roller 6 is rotatably attached to the inside thereof, and the locking device 4 is configured to be freely movable in the length direction of the hanger main body 2. Further, a protrusion 7 is provided on the upper surface of the mounting member 5, and this protrusion 7
A fulcrum of a lever 8 is pivotally attached to the lever 8, and a lock pin 9 is attached to the tip of the lever 8 so as to be directed downward. In addition, a plurality of alignment grooves 10 are formed at predetermined positions at intervals on the upper surface of the suspender body so that the tips of the locking pins 9 are aligned, and the other gripping arm 3b is moved to a position where the electrode 1 can be gripped. When the position is reached, the lock pin 9 is aligned with the alignment groove 10 at a predetermined position corresponding to that position, and the other gripping arm 3b is locked. Note that the positions of these alignment grooves are the positions of the electrodes where the electrodes 1 of various lengths are gripped by the other gripping arm 3b, that is, the positions of the electrodes 1
Formed according to the length of. In short, matching groove 1
A plurality of electrodes 0 are formed at intervals on the upper surface of the suspender main body 2 according to the length of the electrode.

Moreover, since the electrode 1 is long, heavy, and fragile, in order to grasp the electrode 1 at both ends, as shown in FIGS. 1, 2, and 3,
Configure a gripping device.

That is, this gripping device is shown in FIGS. 2 and 3.
As shown in detail in the figure, each gripping arm 3a, 3
Three receiving claws 15a and 15 are provided at the tip of b, respectively.
b, 15c are installed. Among these receiving claws, the center receiving claw 15a located vertically below is the electrode 1.
The side receiving claws 15b and 15c supporting the side surfaces of the electrode 1 are mounted symmetrically with respect to the receiving claw 15a (see FIG. 3). Moreover, as mentioned above, one gripping arm 3a
is fixed to one end of the sling main body 2, and the other gripping arm 3b is configured to be movable along the sling main body 2, and in addition, a matching groove 10 formed at intervals on the sling main body 2 and When the other gripping arm 3b is locked by the locking pin 9 that engages with these grooves 10, the fragile electrode is secured to the three receiving claws 15a, 15b, 15c without damaging its end.
It is reliably supported from the outer periphery without strong contact. In other words, the alignment groove 1 on the suspension main body 2
0 is not continuous but is formed stepwise at predetermined intervals. Therefore, when the lock pin 9 is engaged with the predetermined alignment groove 10, an arrow balance is formed between the end surface of the electrode 1 and the other gripping arm 3b, so that almost no force is applied to the end of the electrode 1. It can be supported without adding.

Further, a plurality of receiving portions 16 are provided on the lower surface of the hanging device main body 2, and a plurality of rotatable rollers 17a, 17b are attached to the tips of each of these receiving portions 16.
The electrode 1, which is supported with an arrow balance between the gripping arms 3a and 3b as described above, is pressed downward from above by a plurality of rollers 17a and 17b, and the electrode 1 is rolled by the rollers 17a and 17b. bring into contact. That is, the surface of the electrode 1, whose both ends are supported by the three receiving claws 15a, 15b, 15c, is pressed from above by the receiving rollers 17a, 17b, but when the electrode 1 is being transported, etc.
Since the electrode 1 is in rolling contact with the rollers 17a and 17b, the electrode 1 can move within the range of allowance in the length direction, and no excessive load is applied to the electrode 1.

As explained in detail above, in the graphite electrode lifting and conveying device according to the present invention, of a pair of gripping arms that grip both ends of an electrode, one gripping arm is fixed to the suspender main body, and the other gripping arm is fixed to the suspender body. It is attached to the sling main body via a locking device so as to be movable in the length direction, and the locking device is locked in alignment grooves formed at intervals on the sling main body, so that the other gripping arm is at a predetermined position. It is something that can be locked.
Moreover, three receiving claws are provided at the tip of each gripping arm, and the gripping arm is pressed downward by these receiving claws. Therefore, while being lifted and transported, the electrode can be moved in the length direction within a predetermined allowance range, and even if the graphite is fragile, it can be moved smoothly without placing an excessive load on the end face of the graphite. Can be lifted and transported.

In other words, even if the other gripping arm of the locking device is locked at a desired location, the electrode can move freely due to the rolling of the receiving roller, and the end of the electrode cannot be damaged by being held down by both gripping arms. do not have.

[Brief explanation of the drawing]

1 and 2 are a side view of a conveyance device according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken from the direction of arrow A-A in FIG. 1, and FIG. FIG. 3 is an explanatory diagram of an example of a locking mechanism of a gripping arm. Code 1...graphite electrode, 2...suspension main body, 3
a, 3b...Gripping arm, 4...Lock device, 1
5a, 15b, 15c...receiving claw, 16...receiving portion, 17a, 17b...rolling roller.

Claims (1)

[Claims] 1. One gripping arm that grips one end of a cylindrical graphite electrode is fixed to one end of the suspender body,
A locking device is attached to the other gripping arm that is to grip the other end of the graphite electrode, and the other gripping arm is locked by engaging with an alignment groove formed in the suspender main body. In a lifting and conveying device in which a gripping arm is movably disposed on the suspension main body, on each opposing surface of the distal end of both the gripping arms,
Side receiving claws are formed on both sides, sandwiching the center receiving claw provided at the lowest end, and the center receiving claw and two side receiving claws on each opposing surface hold both ends of the graphite electrode upward from the bottom. A circle characterized in that a plurality of rollers are attached to the lower surface of the suspender main body, and these rollers are brought into rolling contact with the graphite electrode. Lifting and conveying device for columnar graphite electrodes.