JP2003329373A - Work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work machine for safely transporting a vessel for housing molten metal, and a work machine for performing vessel transport work and slag removing work by one work machine. <P>SOLUTION: This work machine is characterized by having a self-traveling base machine 2, a pair of gripping arms 7 and 8 arranged in an upper frame 3 of this base machine 2, and detachably gripping the vessel S for housing a melt, a lifting mechanism 9 for moving the pair of gripping arms 7 and 8 in parallel in the vertical direction, and raising mechanisms 10 and 11 for raising the pair of gripping arms 7 and 8 by rotating around a horizontal shaft. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine for carrying a container containing a melt and a working machine for removing slag that removes slag floating on the molten metal surface of a melting furnace.

[0002]

2. Description of the Related Art Conventionally, in the process of melting and processing metal in a relatively small-scale facility, a forklift or the like has been used as a transportation means when transferring a molten material contained in a container to another container or furnace. ing.

On the other hand, in the melting furnace, so-called slag removing work is carried out to scrape out the slag floating on the molten metal surface to remove impurities. This slag work is mechanized in large-scale steel mills, and fixed slag work machines are installed on the hot metal processing line according to the production layout, but in small-scale equipment, for example, forklift base machines. The slag working machine is equipped with a work attachment for slag.

[0004]

However, since the forklift used for transporting the above-mentioned container does not have a function of stably transporting the container containing the melt in a stable state, the melt is cooled. Since it is transported after waiting for it to solidify, there is a problem that work efficiency is poor.

Further, since the slag working machine in which the slag attachment is attached to the base machine of the forklift is a dedicated slag working machine, it cannot be used for carrying the above-mentioned container, and as a result, in a narrow space. There was a problem that multiple forklifts and slag working machines were congested in the work site of the above, which was dangerous.

Furthermore, when the slag or the molten metal contained in the container is transferred to another container or furnace, the container must be tilted and discharged, but a separate crane is required to tilt the container. However, there is also an inconvenience that many working machines must be arranged in the work site.

The present invention has been made in consideration of the problems in the conventional container carrying work and slag removing work as described above, and the first object is to safely carry the container while containing the melt. A second object is to provide a working machine capable of performing from container transporting work to slag removing work with a single working machine.

[0008]

The present invention comprises a self-propelled base machine and a gripping means provided on the upper frame of the base machine for detachably gripping a container containing a melt. It is a working machine.

According to the present invention, since the container can be moved while being held by the holding means, it is possible to convey the container in a molten state without waiting for cooling of the molten material.

In the present invention, if the upper frame is provided with an elevating mechanism for moving the gripping means in parallel in the vertical direction, it becomes possible to transfer the melt contained in the container to another container at a high place. .

In the present invention, if the upper frame is provided with an undulating mechanism for undulating the gripping means by rotating it about a horizontal axis, the attitude of the gripping means can be adjusted when gripping the container. Can be easily gripped.

In the present invention, if the gripping means has a pair of arms and the arm is provided with a container tilting means for tilting the container to the pouring posture, the molten material in the container can be completely discharged. become.

In the present invention, if the arm is provided with a drop-out preventing portion for preventing the drop-off of the container, the hot water discharge work can be performed safely.

In the present invention, if the drop-out preventing portion is constituted by a hook body that moves in conjunction with the container inclining means, and the carrying pin provided on the container is restrained to prevent the drop-out. With a simple structure, it is possible to reliably prevent the container from falling off when the hot water is discharged.

In the present invention, if the upper frame of the working machine having the above-mentioned structure is provided with a slag attachment for scraping the slag floating on the molten metal in the furnace by expanding and contracting with respect to the melting furnace, one working machine is provided. It becomes possible to carry out container transportation work and slag removal work.

In this transporting and slag working machine, when the elevating mechanism has a guide post which is fixed to the tip of an elevating frame as an elevating mechanism and serves as a guide when the holding means moves up and down, the slag is removed from the guide post. Attachments can be provided. Thereby, the drive source for raising and lowering the gripping arm can be shared as the drive source for raising and lowering the slag attachment.

If the second lifting means for moving the slag attachment in parallel in the vertical direction is provided, the slag work can be performed according to the height of the molten metal in the melting furnace.

Further, if the upper frame of the working machine is composed of an upper revolving structure which can be swiveled around a vertical axis like a hydraulic excavator base machine, the sludge attachment is rotated by rotating the upper revolving structure. It is possible to dispose it obliquely with respect to the lower traveling body, and it becomes possible to safely perform the slag work at a position deviated from the front face of the opening of the melting furnace.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings.

1A and 1B show an embodiment of a working machine according to the present invention. FIG. 1A is a plan view and FIG. 1B is a side view.

In both figures, the working machine 1 uses a hydraulic excavator base machine, and the crawlers 2 are arranged to the left and right.
An upper revolving structure (upper frame) 3 is rotatably mounted on a lower traveling structure 2 on which a is mounted.

A cabin 4 on which an operator rides is provided on the left side of the upper swing body 3, an equipment cover 5 mainly containing a fuel tank, a hydraulic oil tank, a battery and the like is arranged on the right side of the cabin 4 and behind the cabin. An engine case 6 mainly containing an engine unit, hydraulic equipment, etc. is arranged.

Further, a pair of gripping arms (grasping means) 7 and 8 are provided at the front part of the upper swing body 3, and the gripping arms 7 and 8 are connected to the frame 10 via an elevating mechanism 9. ing.

The base of the frame 10 is connected to the front of the upper revolving structure 3 via a frame foot pin 10a, and a frame cylinder 11 for hoisting the frame 10 is provided below the frame 10. There is. The frame 10 and the frame cylinder 11 function as a hoisting mechanism.

FIG. 2 is an enlarged view of the frame 10, the lifting mechanism 9 and the pair of gripping arms 7 and 8.

In the figure, when the rod 11a of the frame cylinder 11 is extended, the frame 10 which is in a non-operating posture and is positioned substantially horizontally rotates about the frame foot pin 10a in the direction of arrow A, and vice versa. 1
When 1a is reduced, the frame 10 rotates in the direction of arrow B. In the present embodiment, the container is configured to be rotatable by, for example, 2 ° in the arrow A direction and 10 ° in the arrow B direction with reference to the substantially horizontal position so that the container can be easily gripped and transported.

A lifting mechanism 9 is provided at the tip of the frame 10.
Is fixed.

The elevating mechanism 9 has an upper lateral beam portion 9a and a lower lateral beam portion 9a 'extending from the tip of the frame 10 in the vehicle width direction, and these lateral beam portions 9a, 9a' are vertically connected. In this way, columnar guide posts 9b are erected in parallel from the left and right ends thereof. It should be noted that both lateral beam portions 9a and 9a 'are formed by the rod 11 of the frame cylinder 11.
It is connected via a mounting plate 11b to which a is mounted.

A guide groove is formed inside the guide post 9b, and a gripping arm elevating cylinder 9c that extends and contracts in the vertical direction in parallel with the guide post 9b is provided.

The tube side (lower end) boss of the gripping arm elevating cylinder 9c is connected to the mounting plate 11c via a pin, and the rod side (upper end) boss is rotatably provided with a sprocket 9d. The part 9e is attached. A guide roller 9f is provided coaxially with the rotating shaft of the sprocket 9d, and the guide roller 9f slides vertically in the guide groove.

The sprocket 9d is folded back to hang a chain 9g. One end of the chain 9g is fixed to the upper cross beam 9a via a bracket 9h, and the other end is a rear end of the gripping arms 7 and 8. It is fixed to the section.

Therefore, when the rod 9i of the gripping arm elevating cylinder 9c extends, the sprocket 9d rises, and the gripping arm 7 is moved by a movement amount which is twice the stroke of the rod 9i.
8 rises.

Further, the space between the gripping arms 7 and 8 is set to the container S.
Corresponding to the lateral width of the container S (see FIG. 1 (a)), and when the gripping arms 7 and 8 are inserted along both side surfaces of the container S, they are located below the flange portions S ₁ projecting on the left and right sides of the container S. The gripping arm will be located at.

The structure of the gripping arms 7 and 8 will be described. Since the gripping arms 7 and 8 are symmetrically arranged in the vehicle width direction and have basically the same structure, the structure of the gripping arm 8 will be described as a representative.

In FIG. 2, the gripping arm 8 is provided with a link 8b which swings around a pin 8a arranged at its tip, and a container tilting cylinder 8c is provided as a swinging drive source. ing. This cylinder 8
The tube side boss of c is connected to the rear end of the gripping arm 8 via a bracket 8d, while the rod side boss is connected to a connecting point 8e provided closer to the rotation center than the middle of the link 8b. Has been done. The link 8b and the container tilting cylinder 8c function as container tilting means.

Therefore, the rod 8 of the container tilting cylinder 8c
When f is extended, the link 8 is rotated about the pin 8a as the center of rotation.
b rotates in the direction of arrow C and moves to the posture shown by the chain double-dashed line in the figure.

An auxiliary link 8g is further provided at the front end of the link 8b, and this auxiliary link 8g is
It is connected to a hook member (hook body) 8i that swings around the pin 8h. The auxiliary link 8g and the hook member 8i function as a dropout prevention portion.

The hook member 8i constitutes a recess 8j for accommodating the carrying pin S ₂ projecting from the container S to the left and right with a play, and a contour of the recess 8j.
Closure 8 for restraining the carrying pin S ₂ and preventing its removal
equipped with k.

As the link 8b rotates in the direction of arrow C, the auxiliary link 8g also rotates in the same direction, and the hook portion 8i also rotates in the direction of arrow C with the pin 8h as the center of rotation.

On the other hand, a bay-shaped notch 8l is formed at the tip of the gripping arm 8, and the carrying pin S ₂ is fitted in the notch 8l. Therefore, when the link 8b rotates in the direction of the arrow C and moves to the position shown by the chain double-dashed line, the closing portion 8k of the hook portion 8i closes the opening portion of the notch portion 8l, and as a result, the carrying pin S ₂ It is designed to prevent the slipping out.

Returning to FIG. 1, description will be made.

A slag arm (slag attachment), which will be described later, is provided at the right end of each of the lateral beam portions 9a and 9a 'of the lifting mechanism 9.
A guide portion 13 for guiding the lifting and lowering of 12 is provided upright, and an arm lift 14 formed in a U shape in a plan view moves up and down with the guide portion 13 as a guide.

On the lower end of the arm lift 14 and the upper end of the guide post 9b, a slag arm elevating cylinder (second elevating means) 15 is erected with the rod 15a extended. When 15a is reduced,
The arm lift 14 is pulled up, whereby the slag arm 12 fixed to the arm lift 14 rises in the direction of arrow D.

The arm lift 14 is attached to a guide portion 13, and the guide portion 13 has both lateral beam portions 9a and 9a '.
Since the frame 10 is fixed, the slag arm 12 can be undulated similarly to the gripping arms 7 and 8 by undulating the frame 10. In the figure, 16 is a slag blade provided at the tip of the slag arm 12.

3A and 3B show the construction of the slag arm 12, wherein FIG. 3A shows the slag arm 12 in a maximum extended state, and FIG. The state of being reduced to (c) shows the configuration of the slag blade 16, respectively.

In both figures, the slag arm 12 includes a fixed arm 12a, an intermediate arm 12b and a front end arm 12 in the fixed arm 12a.
c is housed in a telescopic manner, and by extending and retracting the arm extension cylinder 12d mounted on the fixed arm 12a, the intermediate arm and the tip arms 12b and 12c can be advanced and retracted using the fixed arm 12a as a guide. Has become.

A slag blade 16 is attached to the tip of the tip arm 12c for scraping out the slag floating on the molten metal surface of the melt stored in the melting furnace.

The slag blade 16 is formed in a convex shape as a whole by a column portion 16a extending vertically and a blade plate portion 16b formed on both sides of the column portion 16a. A comb-teeth-shaped scraping blade 16c is formed on the lower edge of the slag blade 16 so that the slag floating on the molten metal surface can be effectively removed.

The slag blade 16 is provided with a tip arm 12 via a rotary shaft 16d provided on an upper portion of the column 16a.
It is connected to c and can be fixed in an arrangement along the vehicle width direction as shown in FIG. 1 (b) at the time of work, and when not working, it is rotated by 90 ° about the rotating shaft 16d as the rotation center, and the slag arm is It can be fixed in a retracted arrangement along the direction of expansion and contraction of 12. In this way, the slag blade 16 can be moved to the retracted position when not in operation so as not to project in the vehicle width direction.

Next, the extension / contraction mechanism of the slag arm 12 will be described.

First, the mechanical elements used for the reduction operation of the arm will be described.

A movable sheave 12e is provided at the rod tip of the arm telescopic cylinder 12d, and a fixed sheave 1 is provided at the rear end of the tube.
2f are provided respectively.

One end of the rope r1 bridged over the sheaves 12e and 12f is fixed to a fixed portion 12g provided on the upper surface of the outer wall of the fixed arm 12a, and the other end is folded back from the fixed sheave 12f to form an intermediate arm 12b. It is fixed to a fixing portion 12h provided at the rear end.

The rope r2 pulled out from the fixed portion 12i provided at the tip of the fixed arm 12a folds back the sheave 12j provided at the rear end of the intermediate arm 12b, passes through the intermediate arm 12b, and passes through the tip arm 12c. It is fixed to a fixed portion 12k provided at the rear end.

Therefore, in FIG. 3 (a), when the arm extension cylinder 12d is extended, the movable sheave 12e moves in the direction of arrow E, and the fixed sheave 12f and the intermediate arm 12b.
By pulling the rope r1 stretched between the fixed arm 12h and the fixed portion 12h in the direction of the arrow F, first, the intermediate arm 12b.
Is stored and the intermediate arm 12b thereof is stored, the rope r2 stretched between the sheave 12j and the fixed portion 12k is also pulled in the direction of the arrow F, and the tip arm 12
c is also stored in association with the intermediate arm 12b.

Next, the mechanical elements used for the extension operation of the slag arm 12 will be described.

A case 12l is provided above the fixed arm 12a.
A sheave 1 is provided at the front end of the case 12l.
2m is placed. One end of the rope r3 bridged between the sheave 12m and the movable sheave 12e described above has a fixed portion 12 provided at a rear end portion of the intermediate arm 12b.
n is fixed to the other end and sheaves 12m and 12 on the other end.
It is fixed to a fixing portion 12o provided on the front upper surface of the outer wall of the fixed arm 12a by going around e.

A sheave 12p is provided on the inner wall of the front end of the intermediate arm 12b, and one end of the rope r4 suspended on the sheave 12p is fixed to a fixed portion 12q provided at the rear end of the fixed arm 12a. The other end is fixed to a fixing portion 12r provided at the rear end of the tip arm 12c by folding back the sheave 12p.

Therefore, when the arm telescopic cylinder 12d is contracted from the state of FIG. 3 (a), the sheave 12e and the sheave 1
The distance from 2 m widens, and the rope r3 is pulled in the direction of arrow F, so that the intermediate arm 12b is first pulled out, and the intermediate arm 12b is pulled out to widen the distance between the sheave 12p and the fixed portion 12q, and the tip arm 12c. Is also linked.

As described above, the slag arm 12 of the present embodiment
Since the arm extension cylinder 12d is arranged on the fixed arm 12a that is not easily affected by the heat of the melting furnace, the durability of the cylinder can be improved. Also, the slag arm 1
Since the rope for extending and contracting 2 is wired in the arm, the slag arm 12 can be stably operated without fear that slag or the like will be attached.

Next, the container carrying operation of the working machine 1 having the above structure will be described with reference to FIGS. 4 and 5.

In FIG. 4 (a), the working machine 1 is moved so that the grasping arms 7 and 8 are located on both side surfaces of the container S,
By contracting the frame cylinder 11, the frame 10 is rotated in the direction of arrow B, and the gripping arms 7 and 8 are tilted downward. Next, move the work implement 1 forward (direction of arrow G)
Then, the recess 8j formed at the tip of the gripping arms 7 and 8 is positioned below the carrying pin S ₂ of the container S.

Next, in FIG. 4 (b), the frame cylinder 11 is extended to rotate the frame 10 in the direction of arrow A so that the recess 8j is engaged with the carrying pin S ₂ of the container S. At this time, the upper edge of the link 8b contacts the flange portion S ₁ of the container S.

Next, in FIG. 4C, when the frame 10 is further rotated in the direction of arrow A, the container S is separated from the installation surface and becomes movable.

In the figure, reference numeral 20 denotes a gutter for charging the molten metal into the container S, which is fixed in the above embodiment, but moves to a retracted position where it does not interfere with the container S when the container S is transported. It may be.

In this way, the carrying pin S is used for carrying the container.
₂ is engaged with the cutout portion 8l of the gripping arm 8 (the gripping arm 7 is similarly engaged), and the container S
Link the flanges S ₁ formed on both sides of the
Support (supports the gripping arm 7 in the same manner)
With this configuration, the container S can be safely transported while the molten material is contained in the container S.

FIG. 5 shows the operation of discharging the molten material in the container S into the melting furnace 21, where (a) is a plan view and (b) is a plan view.
Is a side view.

The melting furnace 21 is a refining furnace used in the aluminum melting and refining process, and is mainly for melting the raw materials.

When the working machine 1 is moved to the hot water discharging position, the gripping arms 7 and 8 are raised and the container S is lifted above the gutter 22.

Next, the container tilting cylinder 8c provided on the gripping arms 7 and 8 is extended, and the link 8b is moved to the arrow C.
Rotate in the direction.

Since the link 8b is in contact with the flange S ₁ , the container S is displaced from the horizontal posture to the vertical posture by the rotation of the link 8b.

As described above, when the link 8b moves to the position shown by the chain double-dashed line, the closing portion 8k of the hook portion 8i closes the opening of the cutout portion 8l and the transport pin S ₂ is pulled out. (See FIG. 2), the container S does not drop from the gripping arms 7 and 8 even if the container S is displaced in the vertical posture.

Next, the operation of the slag removing work will be described with reference to FIG. The drawing (a) shows a plan view and the drawing (b) shows a side view, and the melting furnace 23 is a refining furnace.

In carrying out the slag removal work, the operator of the working machine 1 determines that the slag removal arm 12 has the center line C.I.
The working machine 1 is moved to a position substantially matching L.

At this time, since the cabin 4 of the working machine 1 is located away from the front of the opening 23a of the melting furnace 23,
Even if the molten material is scattered from the melting furnace 23, the molten material is not directly exposed to the molten material, and the slag removing work can be performed safely.

Next, the arm lift 14 is moved up and down to adjust the slag arm 12 to the height of the opening 23a.

Next, the intermediate arm 12b of the slag arm 12,
The tip arms 12c are respectively extended to remove the slag blade 1
6 is made to enter the inner part of the melting furnace 23 (the extended state of the slag arm 12 is shown by a chain double-dashed line H in the figure). At this time, the slag arm 1 is so set that the slag blade 16 is slightly immersed in the molten metal surface.
2 is inclined downward (indicated by a chain double-dashed line H ₁ in the figure).

Next, the slag arm 12 is contracted. Thereby, the slag blade 16 starts scraping off the slag. In addition,
When scraping is performed with the slag arm 12 tilted downward, the slag arm 12 is gradually lowered while the slag arm 12 is contracted so that the slag blade 16 always contacts the slag layer. To do so.

The slag thus scraped out is discharged from the opening 23a of the melting furnace 23. The slag is removed from the molten metal surface by repeatedly performing the extension operation and the contraction operation of the slag arm 12 described above.

When scraping the slag floating on both the left and right sides of the melting furnace 23, the upper slewing body 3 is rotated to dispose the slag arm 12 diagonally to the right (indicated by a chain double-dashed line H in the figure).
₂ )) or diagonally to the left (indicated by a chain double-dashed line H ₃ in the figure) to remove the slag.

By carrying out the above operation, it is possible to carry out the container carrying work and the slag working with one working machine 1.

Although the lower traveling body of the self-propelled base machine according to the present invention is equipped with the crawler in the above-mentioned embodiment, the lower traveling body is not limited to this and may be constituted by a wheel type, for example.

Further, although the slag arm 12 of the present invention is constituted by a three-stage telescopic type in the above-mentioned embodiment, the slag arm is a telescopic type arm having a number of stages less than that or more depending on the working environment or the scale of the melting furnace. It can also be configured.

The working machine of the present invention can be applied not only to the refining of aluminum but also to the slagging work of a metal melting furnace and to the transportation of containers.

[0085]

As is apparent from the above description,
According to the present invention of claim 1, since the upper frame of the self-propelled base machine is provided with the gripping means for detachably holding the container containing the melt, the melted state is maintained without waiting for the melt to cool. The container can be transported as it is, and the work efficiency can be improved.

According to the second aspect of the present invention, since the upper frame is provided with the elevating mechanism for moving the gripping means in the vertical direction in parallel, the melt contained in the container is transferred to another container at a high place. It will be possible.

According to the third aspect of the present invention, since the upper frame is provided with the undulating mechanism for undulating the gripping means by rotating it about the horizontal axis, the posture of the gripping means is adjusted when gripping the container. It is possible to easily hold the container.

According to the present invention of claim 4, a pair of arms are provided as the gripping means, and the arm is provided with the container tilting means for tilting the container to the pouring posture, so that the molten material in the container is completely removed. It becomes possible to discharge.

According to the present invention of claim 5, since the arm is provided with a drop-out preventing portion for preventing the drop-off of the container, the work can be safely carried out without dropping the container from the arm when the hot water is discharged. become.

According to the present invention of claim 6, the drop-out preventing portion is constituted by a hook body which moves in conjunction with the container inclining means, and the carrying pin provided on the container is restrained to prevent the drop-out. Since it is configured to do so, it is possible to reliably prevent the container from falling off when the hot water is discharged, with a simple configuration.

According to the present invention of claim 7, since the upper frame of the working machine having the above-mentioned structure is provided with the slag attachment for scraping the slag floating on the molten metal in the furnace by expanding and contracting with respect to the melting furnace, It is possible to perform the container transporting work and the slag removing work with a single working machine, which can improve the work efficiency and reduce the facility cost. Further, there is an advantage that it is possible to eliminate the congestion of a large number of work machines at the work site and perform the work safely.

According to the present invention of claim 8, in the working machine of claim 7, as the elevating mechanism, a guide post fixed to the tip of an elevating frame as an elevating mechanism and serving as a guide when the gripping means ascends and descends is provided. Since the guide post is provided with the slag attachment, the drive source for raising and lowering the gripping arm can be shared as the drive source for raising and lowering the slag attachment.

According to the ninth aspect of the present invention, since the second lifting means for moving the slag attachment in parallel in the vertical direction is provided, the slag work can be performed according to the level of the molten metal in the melting furnace. it can.

According to the tenth aspect of the present invention, since the upper frame of the working machine is composed of the upper revolving structure which can revolve around the vertical axis like the base machine of the hydraulic excavator, the upper revolving structure is rotated. By doing so, it becomes possible to dispose the slag attachment obliquely with respect to the lower traveling body, and it becomes possible to safely perform the slag operation at a position deviated from the front face of the opening of the melting furnace.

[Brief description of drawings]

1A is a plan view showing an embodiment of a working machine according to the present invention, and FIG. 1B is a side view thereof.

FIG. 2 is a side view showing a configuration of a gripping arm shown in FIG.

3A is a side view showing an extended state of the slag arm shown in FIG. 1, and FIG. 3B is a side view showing the same contracted state.

FIG. 4A is an explanatory diagram illustrating a positioning operation of a gripping arm, FIG. 4B is an engaging operation between a gripping arm and a container, and FIG.

FIG. 5 (a) is a plan view illustrating a hot water discharging operation of the container, and FIG.
Is a side view thereof.

FIG. 6A is a plan view for explaining the slag work, and FIG. 6B is a side view thereof.

[Explanation of symbols]

1 working machine 2 Undercarriage 3 Upper revolving structure 4 cabins 5 Equipment cover 6 engine case 7,8 gripping arm 8b link 8c Cylinder for tilting container 9 Lifting mechanism 9b guide post 9c Grasping arm lifting cylinder 10 frames 11 frame cylinder 12 Slag arm 12a Fixed arm 12b Intermediate arm 12c tip arm 13 Guide 14 Arm lift 15 Desoldering arm lifting cylinder 16 Slag blade

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeyuki Ueda             14-1 Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Co., Ltd.             Kobe Steel Chofu Factory (72) Inventor Taketoshi Kido             14-1 Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Co., Ltd.             Kobe Steel Chofu Factory (72) Inventor Yukio Koizumi             Kobe, 3-12-25 Gion, Asanan-ku, Hiroshima-shi             Ruco Construction Machinery Engineering Co., Ltd. (72) Inventor Kazuo Oda             Kobe, 3-12-25 Gion, Asanan-ku, Hiroshima-shi             Ruco Construction Machinery Engineering Co., Ltd. (72) Inventor Yoshiyasu Umezu             Kobe, 3-12-4 Gion, Asanan-ku, Hiroshima-shi             Luko Construction Machinery Co., Ltd. Hiroshima headquarters (72) Inventor Hisashi Kadowaki             Kobe, 3-12-4 Gion, Asanan-ku, Hiroshima-shi             Luko Construction Machinery Co., Ltd. Hiroshima headquarters F-term (reference) 4K055 LA02 LA23

Claims (10)

[Claims] 1. A working machine comprising: a self-propelled base machine; and a gripping means which is provided on an upper frame of the base machine and which detachably grips a container containing a molten material. 2. The working machine according to claim 1, wherein the upper frame is provided with an elevating mechanism for moving the gripping means in a vertical direction. 3. The working machine according to claim 1, wherein the upper frame is provided with a hoisting mechanism for hoisting the gripping means by rotating it around a horizontal axis. 4. The work machine according to claim 1, wherein the gripping means has a pair of arms, and the arm is provided with a container inclining means for inclining the container to a pouring posture. 5. The working machine according to claim 4, wherein the arm is provided with a drop-out preventing portion for preventing the container from falling off. 6. The drop-out preventing portion comprises a hook body that moves in conjunction with the container inclining means, and is configured to restrain a carrying pin provided on the container to prevent the container from being pulled out. The working machine according to claim 5. 7. The upper frame of the working machine according to any one of claims 1 to 5 is provided with a slag attachment for scraping out slag floating on the molten metal in the furnace by expanding and contracting with respect to the melting furnace. A working machine characterized by that. 8. The elevating mechanism has a guide post that is fixed to the tip of an elevating frame serving as the elevating mechanism and serves as a guide when the gripping means moves up and down, and the guide post is provided with the slag attachment. Claim 7
The work machine described. 9. The working machine according to claim 7, further comprising second elevating means for moving the debris attachment in parallel in a vertical direction. 10. The working machine according to claim 1, wherein the upper frame is an upper revolving structure capable of revolving around a vertical axis.