JPH07294145A - Rotary melting furnace - Google Patents

Abstract

PURPOSE:To maintain an effectively closed state without inclining a cover to a body opening due to extension or contraction of the body by so locating the cover at a predetermined closing position that a burner can be directed in an exact direction. CONSTITUTION:Drive means for driving a cover 4 having a burner 5 has a switching mechanism for linearly moving the cover 4 along the axis of a body 1 between a front surface position and a closed position for closing an opening 14, and a retracting mechanism for turning the cover 4 between the front surface position and the retracted position displaced out of the axis of the body 1. An air cylinder is used for the switching mechanism as a buffer mechanism for absorbing the axial contraction of the body 1 in the state that the opening 14 of the body 1 is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary melting furnace for producing molten metal such as cast iron and aluminum by flame radiation.

[0002]

2. Description of the Related Art Conventionally, a rotary melting furnace shown in FIG. 7 has been known for producing molten cast iron by flame radiation. This rotary melting furnace includes a furnace body 101 made up of a substantially cylindrical base cylinder 111 made of a stainless steel thick plate and a refractory brick layer 112 lined on the inner surface of the base cylinder 111, and an opening 114 and an opening 114 at the front and rear ends thereof. An exhaust port (not shown) is formed. The furnace body 101 is supported so as to be rotatable about a cylinder axis and tiltable about a horizontal axis orthogonal to the cylinder axis.

On the front side of the furnace body 101, the swivel shaft 1
06 is erected on the base 107, and the burner 10 is provided at the tip of the arm 161 extending horizontally from the upper end thereof.
A lid 104 having the number 5 is provided. Arm 161
A cylinder device 171 is attached to the cylinder body 171. When the cylinder device 171 is operated, the arm 161 pivots around the pivot shaft 106, so that the lid body 104 opens and closes the opening 114 of the furnace body 101 in the horizontal posture. When the lid body 104 is placed at the closed position, the opening 11 of the furnace body 101 is slidable with the rotating furnace body 101 and the lid body 104.
4 is hermetically closed. When the lid body 104 is arranged in the closed position, the burner 105 is arranged so that the flame radiation direction is along the cylindrical axis of the furnace body 101. The lid 104 is transferred to the retracted position off the cylindrical axis of the furnace body 101 in order to secure a working space on the front end side of the furnace body 101.

In order to operate the rotary melting furnace, the furnace body 101 is tilted and the raw material is charged into the furnace body 101 from the exhaust port on the rear end side to return the furnace body 101 to the horizontal state. After that, by operating the cylinder device 171, the lid 104 is swung to the closed position of the opening 114 of the furnace body 101, and the flame is emitted from the burner 105 while rotating the furnace body 101. The raw material is heated and melted.

When the raw material is melted to produce a molten metal, a tap hole (not shown) formed on the front end side of the furnace body 101 is opened to discharge the molten metal. Then, the cylinder device 171
Is operated to swivel the lid 104 from the closed position to the retracted position, and the furnace body 101 is further tilted to discharge the slag from the opening 114. After slag discharge, furnace body 1 again
01 is tilted to shift to the next cycle of charging the raw materials, or the furnace body 101 is returned to the horizontal state to end the operation.

[0006]

By the way, when a high-temperature flame is radiated from the burner 105 during the operation of the rotary melting furnace, the furnace body 101 itself repeatedly expands and contracts under the influence of heat. Therefore, when the lid body 104 is swung while the furnace body 101 is extending in the cylinder axis direction, the lid body 1
A situation occurs in which 04 cannot turn to a predetermined closed position and stops midway. On the contrary, when the lid body 104 is swung while the furnace body 101 is contracting in the cylindrical axis direction,
A situation occurs in which the lid 104 stops beyond a predetermined closed position. In such a case, the lid 104 is inclined with respect to the opening surface, and the flame radiation direction of the burner 105 is also inclined with respect to the cylinder axis.
The burner 105 cannot be placed in the correct direction.

When the furnace body 101 repeatedly expands and contracts during the operation of the rotary melting furnace, the lid body 104 closing the opening 114 of the furnace body 101 moves the swivel shaft 106 as the furnace body 101 expands and contracts. It will rotate to the center and will be inclined with respect to the opening surface of the furnace body 101. Thereby, the lid 1
04 and the opening 114, a gap is created, the exhaust gas in the furnace body 101 leaks from the gap, which causes environmental deterioration, and when air enters through the gap, the furnace body 10
The atmosphere in 1 changes and causes deterioration of the quality of the molten metal.
Further, when the lid body 104 is inclined, the lid body 1
There is also a problem that the flame radiation direction of the burner 105 mounted on the No. 04 is deviated from an accurate direction.

The present invention has been devised in view of the above problems, and a first object thereof is to enable the burner to be arranged in a predetermined closed position so that the burner faces an appropriate direction. The second problem is to make it possible to maintain a reliable closed state without the lid body tilting with respect to the furnace body opening due to expansion and contraction of the furnace body.

[0009]

[Means for Solving the Problem] First for solving the above-mentioned first problem.
The invention employs a novel configuration in which the driving means is composed of an opening / closing mechanism for moving the lid body linearly along the cylinder axis and a retracting mechanism for transferring the lid body from the cylinder axis. As a preferred mode of the first invention, the retracting mechanism is
The lid can be configured to be horizontally swiveled.

A second invention for solving the above-mentioned second problem adopts a novel structure in which the lid body has a buffer mechanism for absorbing expansion and contraction of the furnace body in the cylindrical axis direction in a state where the opening is closed. .

[0011]

In the rotary melting furnace of the first aspect of the invention, the lid provided with the burner is opened / closed by moving the lid linearly along the cylindrical axis of the furnace by the opening / closing mechanism of the driving means. As a result, even when the furnace body is expanding and contracting in the cylinder axis direction due to heat, the lid body is accurately arranged at a predetermined closed position of the furnace body opening so that the flame radiating direction of the burner is along the cylinder axis direction. It

In the rotary melting furnace according to the second aspect of the invention, when the furnace body expands and contracts in the cylindrical axis direction due to heat while the lid body is operating with the furnace body opening closed, the expansion and contraction of the furnace body is buffered. It is absorbed by the mechanism. As a result, the state in which the lid is securely closed without being inclined with respect to the furnace body opening is maintained, a gap is created between the lid and the opening, and the flame radiation of the burner attached to the lid is maintained. The direction does not deviate from the proper direction.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a side view of a rotary melting furnace according to this embodiment, FIG. 2 is a front view thereof, FIG. 3 is a plan view showing a partial cross section of a main portion thereof, and FIG. Is a side view showing a part of the main part in a cross section, and FIG. 5 is a side view showing the driving means in a part cross section.

In the figure, reference numeral 1 denotes a furnace body having a cylindrical shape with openings at both ends. The furnace body 1 is a substantially cylindrical base cylinder 11 made of a stainless steel thick plate, and the inner surface of the base cylinder 11 is thickly lined. And a refractory brick layer 12. The base cylinder 1
1 is divided and formed in the cylindrical axis direction in order to disperse the expansion and contraction strain in the cylindrical axis direction due to heat, and is connected by expansion and contraction bolts 13 with springs.

At the center of the front end wall of the furnace body 1, there is formed a circular opening 14 into which a lid 4 described later can be fitted.
An exhaust port 15 is formed in the center of the rear end wall.
In addition, a pair of tapping pipe portions 16 are provided at an axisymmetric position of the front end wall of the furnace body 1 so as to project slightly obliquely with respect to the axis, and tapping holes 17 are formed in the tapping pipe portion 16 so as to communicate with the inside of the furnace. Has been done. The tap hole 17 is closed with a clay-like sealing material before the raw material is put into the furnace. In addition, a pair of circular brim portions 18 wound around the base cylinder 11 in the circumferential direction at a constant distance from each other are provided in the central portion of the outer circumference.

The furnace body 1 is rotatably mounted on a tilting table 2 having a U-shaped cross section perpendicular to the cylindrical axis. Tilting table 2
Is a frame body composed of a bottom plate portion 21 and wall portions 22 standing upright from the left and right ends of the bottom plate portion 21. The bottom plate portion 21 has a total of four front, rear, left, and right rollers (in FIG. 23) is rotatably supported by each roller 2
3 rotatably supports the outer peripheral surface of the furnace body 1.

Further, on the bottom plate portion 21 of the tilting base 2, the motor 2 for driving the left side pair of these four rollers 23.
4 is arranged and the torque of the motor 24 is
Is transmitted to the outer peripheral surface of the furnace body 1 to rotate the furnace body 1. Further, a total of four front, rear, left and right support rollers 25 are rotatably supported at the front and rear ends of the wall portion 22, and each support roller 25 is attached to the circular flange portion 18 of the furnace body 1 when the furnace body 1 is tilted. It abuts rotatably to prevent the furnace body 1 from falling off.

The tilting base 2 is pivotally supported by a pair of bases 3 so as to be tiltable. The bases 3 are erected on the floor with a rectangular groove 9 recessed in the floor below the furnace body 1 therebetween, and the tilting bases 2 are pivotally supported on the tops of the bases 3 in a tiltable manner. Tilt axis 3
1 extends in a direction orthogonal to the cylindrical axis of the furnace body 1. The base end of the hydraulic cylinder 32 is pivotally supported at the rear of the rectangular groove 9 so as to be tiltable in the front-back direction, and the tip of the piston rod 33 of the hydraulic cylinder 32 is tiltable in the front-back direction on the bottom of the tilting base 2. Is pivoted to. Therefore,
When the piston rod 33 extends, the tilting base 2 and the furnace body 1
Tilts around the tilting shaft 31. Even if the furnace body 1 is tilted to an oblique posture, the furnace body 1 is supported by the support roller 25 through the circular brim portion 18 so that the furnace body 1 can be rotated even in an oblique posture.

Reference numeral 4 is a lid for opening and closing the opening 14 of the furnace body 1. The lid 4 is formed in a thick disk shape that can be fitted into the opening 14, and a burner 5 having a plurality of nozzles 51 projecting from the inner disk surface and radiating flame is attached to the central portion thereof. . The burner 5 has an opening 1 in the furnace body 1.
It is formed in a cylindrical shape with a size such that a slight clearance is formed between the inner surface of the opening wall and the inner surface of the opening wall when fitted in 4, and the flame radiation direction is arranged along the axis of the furnace body 1. Each burner 5 has a flow control valve (not shown).
Fuel gas and oxygen gas are supplied through the.

The lid 4 is an opening / closing mechanism that opens and closes the opening 14 by linearly moving the lid 4 along the axis of the furnace body 1, and the lid 4
Is provided so as to be movable by a driving mechanism including an evacuation mechanism for shifting the axis from the axis, and is fixed to the tip of an arm 61 that extends horizontally from the upper part of the revolving shaft 6 erected on the movable base 7. The movable base 7 is formed in a box shape, and is installed on the front end side of the furnace body 1 and arranged in a case 70 having a pair of front and rear side walls. Inside the movable base 7, a pair of air cylinders 71 having a first pressure chamber 71a and a second pressure chamber 71b are arranged on the left and right sides along the cylinder axis direction of the furnace body 1. Both ends of the cylinder rod 71c of each air cylinder 71 are projected from the movable base portion 7 and fixed to the front and rear walls of the case 70, respectively, and when air is supplied to the first pressure chamber 71a or the second pressure chamber 71b, The cylinder body side moves linearly with the movable base 7 in the cylinder axis direction. A stopper 72 for stopping the movable base 7 at a predetermined position is provided on the front wall of the case 70.

A drive shaft 73, which is supported by the front and rear walls of the movable base 7, is arranged in parallel between the air cylinders 71 in the movable base 7. The drive shaft 73 is located in front of the movable base 7. It is driven by a motor 74 provided on the wall. A first bevel gear 75 is coaxially attached at a predetermined position substantially in the center of the drive shaft 73. On the other hand, a second bevel gear 76 is fixed coaxially with the swivel shaft 6 to the lower end of the swivel shaft 6 that is erected on the movable base 7 so that the swivel shaft 6 and the movable base 7 can move to a predetermined position. Second bevel gear 7 when moving to
6 and the first bevel gear 75 mesh with each other.
The swivel shaft 6 is provided with a stopper 63 that stops swiveling when the lid 4 provided at the tip of the arm 61 reaches a front position facing the opening 14 on the cylindrical axis of the furnace body 1. .

On the other hand, on the rear side of the furnace body 1, an exhaust duct 8 is arranged so that the exhaust port 15 and the suction port 81 of the furnace body 1 face each other. A trolley 90 for mounting a ladle of molten metal and a slag holder is disposed on the bottom surface of the rectangular groove 9, and a chute 92 for charging a raw material is disposed obliquely above the furnace body 1. In addition, the hydraulic cylinder 32 and the air cylinder 71.
The drive of the motor 74 and the like is controlled based on operation signals from various operation switches on the control panel 95. Further, the control board 95 has a built-in microcomputer, and drives and controls various actuators of the rotary melting furnace such as the above-mentioned flow rate control valve for adjusting the ejection amounts of the fuel gas and the oxygen gas.

The operation of the rotary melting furnace configured as described above is performed as follows. At the start of operation, the lid 4
Is separated from the opening 14 of the furnace body 1 and retracted to the retracted position, and instead, a shield plate (not shown) for closing the opening 14 is attached. Next, when the operation switch is turned on, the hydraulic cylinder 32 is operated to tilt the tilting table 2 and the furnace body 1 to the straight line A (see FIG. 1), and the raw material is introduced from the exhaust port 15 of the furnace body 1 through the chute 92. To do. Next, the hydraulic cylinder 32 is operated by turning on the operation switch (not shown) to return the tilting table 3 and the furnace body 1 to the horizontal posture, the shield plate is removed, and the burner of the lid 4 is turned on by turning on the operation switch. The fuel and oxygen gas ejected from No. 5 are manually ignited.

When the operation switch is turned on to operate the motor 74, the rotary shaft 6 is moved to the first and second positions.
The lid 4 is swung until it is regulated by the stopper 63 via the bevel gears 75, 76, whereby the lid 4 is swung to a front position facing the opening 14 on the axis of the furnace body 1 and stopped. After that, by operating the air cylinder 71 by turning on the operation switch, the lid body 4 that moves linearly in the cylindrical axis direction together with the movable base portion 7 and the turning shaft 6 moves to a position where it closes the opening 14 and stops. As a result, the opening 14 of the furnace body 1 is closed by the lid body 4 pressed by the pressing force of the air cylinder 71, and the burner 5 attached to the lid body 4 is opened.
It is inserted into the inside and is arranged in a proper direction so that the flame radiation direction is along the cylinder axis direction.

In this state, combustion is performed while controlling the flow rates of the fuel gas and oxygen gas, and the furnace body 1 is appropriately rotated to heat and melt the raw material. At this time, when the furnace body 1 expands and contracts in the cylinder axis direction due to heat, the expansion and contraction of the furnace body 1 is absorbed by the air cylinder 71, so that the lid body 1 moves in the cylinder axis direction according to the expansion and contraction of the furnace body 1. To do. As a result, the lid 4 is maintained in a state in which the opening 14 is securely closed, a gap is created between the lid 4 and the opening 14, and the lid 4 is closed.
The flame radiating direction of the burner 5 attached to is not deviated from the proper direction.

After raising the temperature of the molten metal to a sufficient temperature, the rotation of the furnace body 1 is stopped, and the tap hole 1 located at the lower side is
The clay-like encapsulating material packed in 7 is removed by poking, and hot water is discharged to the ladle on the cart 90. When the ladle is full, the furnace body 1 is rotated 90 degrees to raise the tap hole 17 above the molten metal surface, and the ladle is replaced with an empty one in the meantime. After the tapping is completed, the air cylinder 71 is operated by turning on the operation switch, so that the lid body 4 in the closed position of the opening 14 moves linearly in the axial direction together with the movable base portion 7 and the turning shaft 6, and the movable base portion 7 stops. When it is restricted to, the lid 4 stops at the front position. At this time, the first and second bevel gears 75 and 76 that are separated from each other mesh with each other when the lid body 4 reaches the front position. After that, the first and second bevel gears 75, 7 are operated by operating the motor 74 by turning on the operation switch.
The swivel shaft 6 is swung via 6 to swivel the lid 4 from the front position to the retracted position.

Next, the hydraulic cylinder 32 is operated to tilt the tilting base 2 and the furnace body 1 until the cylindrical axis of the furnace body 1 coincides with the straight line B shown in FIG. It is discharged from the opening 14 to a slag receiver (see FIG. 1) on the carriage 90. After slag discharge, the hydraulic cylinder 32 is operated again to tilt the tilting table 2 and the furnace body 1 until the cylindrical axis of the furnace body 1 coincides with the straight line A shown in FIG.

In the next cycle, the furnace body 1 is thermally expanded by the flame radiation in the previous cycle and expanded in the axial direction. However, when the lid body 4 is placed at the closed position of the opening 14 of the furnace body 1, as described above, the lid body 4 in the retracted position is placed.
Is swung to the front position and then moved directly from the front position to the closed position of the opening 14, so that the lid body 4 is accurately arranged at the predetermined closed position of the opening 14, and the burner 5 also has its flame radiation. It is arranged in a proper direction so that the direction is along the cylinder axis direction.

As described above, according to the rotary melting furnace of this embodiment, the lid 4 having the burner 5 mounted thereon is configured to be opened and closed by being moved linearly along the cylindrical axis. Even when the body 1 is expanded and contracted in the cylinder axis direction by heat, the lid body 4 can be accurately arranged at a predetermined closed position of the opening 14 so that the flame radiation direction of the burner 5 is along the cylinder axis direction. .

When the lid is opened and closed by turning as in the conventional case, a clearance is required between the burner and the inner surface of the opening wall of the furnace, which allows the turning of the burner.
Since the lid 14 is opened and closed by linear movement as in this embodiment, the clearance can be reduced. As a result, it is possible to largely avoid the risk of the raw material entering the clearance and coming into operation.

Further, since the lid body 4 for opening and closing the opening 14 of the furnace body 1 is constructed to be linearly moved in the cylinder axis direction by the air cylinder 71, the furnace body 1 is moved in the cylinder axis direction by heat during operation. Since the expansion and contraction of the furnace body 1 is absorbed through the cushioning function of the air cylinder 71 when expanding and contracting, the lid 4 can maintain the state in which the opening 14 of the furnace body 1 is reliably closed. Therefore, since there is no gap between the lid body 4 and the opening 14 of the furnace body 1, the exhaust gas in the furnace body 1 leaks from the opening 14 to deteriorate the environment, or air enters from the outside to allow the furnace body 1 to enter. It is possible to prevent the quality of the molten metal from deteriorating due to the change of the atmosphere inside. Further, the flame radiating direction of the burner 5 attached to the lid body 4 can be maintained in the proper direction without shifting from the cylinder axis.

Although the retracting mechanism of the driving means in this embodiment is constructed so as to rotate the lid 4 horizontally,
When the retracted position of the lid body 4 is set above the furnace body opening 14, the lid body 4 can be configured to vertically swivel, or the lid body 4 can be configured to move straight upward. . (Embodiment 2) FIG. 6 is a plan view showing a partial cross section of an essential part of a rotary melting furnace according to this embodiment.

The rotary melting furnace of this embodiment is different from that of the first embodiment in that the lid 4 itself also has a cushioning mechanism for absorbing expansion and contraction of the furnace body 1 in the cylindrical axis direction, and other configurations are the same. Is. Therefore, in the present embodiment, different points will be mainly described, and description of other common members will be omitted by citing the same reference numerals. The lid 4 provided at the tip of the arm 61 includes a substrate 40 whose one surface is fixed to the arm 61, and a cylindrical body 41 is coaxially connected and fixed to the other surface of the substrate 40. Four spring accommodating recesses 42, which are arranged at equal intervals along the circumferential direction, are formed on the end surface of the main body 41, and one end of each spring accommodating recess 42 is locked to the bottom of the spring accommodating recess 42. The buffer spring 43 is accommodated. An outer case 44 having a cylindrical shape with a bottom and an insertion hole at the center of the bottom is slidably capped on the outer peripheral surface of the main body 41 on the spring accommodating recess 42 side of the main body 41 and the other end of the buffer spring 43. Is locked to the inner surface of the bottom of the outer case 44. And
The burner 5 is fitted and fixed in the center hole of the substrate 40, and is attached to the lid body 4 in a state where the tip of the burner 5 penetrates the inside of the main body 41 and projects from the insertion hole of the outer case 43.

The lid body 4 of this embodiment having the above-described structure
When the lid body 4 is operating with the opening 14 of the furnace body 1 closed and the furnace body 1 thermally expands and extends in the cylindrical axis direction, the outer case 44 pressed by the furnace body 1 is buffered. By moving in the cylinder axis direction against the biasing force of the spring 43, the extension of the furnace body 1 in the cylinder axis direction is absorbed. As a result, the state in which the outer case 44 of the lid 4 securely closes the opening 14 is maintained. On the contrary, when the furnace body 1 contracts in the cylindrical axis direction due to the temperature decrease, the outer case 44 is pushed out in the cylindrical axis direction by the urging force of the buffer spring 43 as the furnace body 1 contracts, and the cylindrical axis line of the furnace body 1 Directional contraction is absorbed. As a result, the state in which the outer case 44 of the lid 4 securely closes the opening 14 is maintained.

Although the expansion and contraction of the furnace body 1 in the cylinder axis direction is mainly absorbed by the buffer mechanism of the lid body 4, the air cylinder 71 provided in the opening / closing mechanism of the driving means is also lidded as in the first embodiment. Simultaneously exerts a cushioning function at the same time as the cushioning mechanism of the body 4. As described above, according to the rotary melting furnace of the present embodiment, since the lid body 4 has the buffer mechanism that absorbs the expansion and contraction of the furnace body 1 in the cylinder axis direction, the furnace body 1 expands and contracts in the cylinder axis direction by heat. Even if the lid body 4 reliably closes the opening 14 of the furnace body 1, it can be maintained. Therefore, the lid 4
It is possible to prevent a gap from being generated between the burner 5 and the opening 14 of the furnace body 1, and to prevent the flame emission direction of the burner 5 mounted on the lid body 4 from deviating from the proper direction.

In the present embodiment, the buffer springs 43 for absorbing the expansion and contraction of the furnace body 1 in the cylinder axis direction are provided at four positions in the circumferential direction to support four points. 1
In order to evenly absorb the expansion and contraction in the cylinder axis direction, it may be configured to support at least three points in the circumferential direction.
Further, the spring accommodating recess may be formed coaxially with the cylindrical main body, and a single buffer spring arranged in the spring accommodating recess may absorb expansion and contraction of the furnace body in the cylindrical axial direction. .

In this embodiment, the lid 4 is used together with the air cylinder 71 having the cushioning function used in the first embodiment.
Although the buffer mechanism is provided in the above, only the buffer mechanism of the lid body 4 may be provided alone.

[0038]

According to the first aspect of the present invention, since the driving means has the opening / closing mechanism for directly moving the lid body along the cylinder axis, even if the furnace body is expanded and contracted in the cylinder axis direction by heat,
The lid can be accurately placed in a predetermined closed position so that the burner is oriented in the correct direction when closing the furnace opening with the lid.

According to the second aspect of the invention, since the lid body has the buffer mechanism that absorbs the expansion and contraction of the furnace body in the cylindrical axis direction in the state where the opening body is closed, the lid body and the furnace body opening are expanded and contracted by the expansion and contraction of the furnace body. It is possible to prevent a gap from being generated between the two.
As a result, it is possible to prevent the quality of the molten metal from deteriorating due to the leakage of exhaust gas from the inside of the furnace body through the opening to deteriorate the environment and the intrusion of air from the outside to change the atmosphere inside the furnace body. Further, it is possible to prevent the flame radiating direction of the burner attached to the lid body from deviating from the proper direction.

[Brief description of drawings]

FIG. 1 is a side view of a rotary melting furnace according to a first embodiment of the present invention.

FIG. 2 is a front view of the rotary melting furnace according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a partial cross section of a main part of the rotary melting furnace according to the first embodiment of the present invention.

FIG. 4 is a side view showing a partial cross section of a main part of the rotary melting furnace according to the first embodiment of the present invention.

FIG. 5 is a side view showing a drive unit of the rotary melting furnace according to the first embodiment of the present invention in a partial cross section.

FIG. 6 is a plan view showing a partial cross section of a main part of a rotary melting furnace according to a second embodiment of the present invention.

FIG. 7 is a plan view showing a partial section of a main part of a conventional rotary melting furnace.

[Explanation of symbols]

1 ... Furnace body 2 ... Tilt base 3 ... Base 4 ... Lid
5 ... Burner 6 ... Swivel axis 7 ... Movable base 14 ... Opening 71 ...
Air cylinder 40 ... Substrate 41 ... Main body 42 ... Spring accommodating recess
43 ... Buffer spring 44 ... Outer case

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 591181089 Naniwa Reactor Research Institute Co., Ltd. 5-1, Ageo-cho, Yao-shi, Osaka 8 (72) Inventor Harumi Hirano 2-1-1, Toyota-cho, Kariya, Aichi Stock company Toyota Automatic Loom Works (72) Inventor Hidetoshi Hirai 2-chome Toyota Town, Kariya City, Aichi Prefecture Stock Company Toyoda Automatic Loom Works (72) Inventor Yuji Kamiya 2-chome Toyota Town, Kariya City, Aichi Prefecture Stock company Toyota Automatic Loom Works (72) Inventor Hiroshi Kobayashi 2-chome Toyota-cho, Kariya City, Aichi Prefecture Stock Company Toyota Toyota Loom Works (72) Inventor Hirokazu Shirakawa 1 Toyota-cho, Aichi Prefecture Toyota Town Automobile Co., Ltd. (72) Inventor Tsutomu Kizaki 1 Toyota-cho, Toyota-shi, Aichi Toyota Automobile Co., Ltd. (72) Inventor Okada (2) Inventor, Yasuo Takeuchi, Toyota Automobile Co., Ltd. (72), Toyota-cho, Toyota-shi, Aichi Prefecture (72) In Toyota Motor Co., Ltd. (1), Toyota-cho, Toyota-shi, Toyota-shi, Aichi (72) Hiroyuki Tsuruoka, 1-chome Shinonome, Koto-ku, Tokyo 9-1 Taisan Co., Ltd. Head Office Branch Office (72) Inventor Makoto Torii 1-chome Shinonome, Koto-ku, Tokyo 9-1 Taisan Co. Head Office Branch Office (72) Inventor Yutaka Takimoto 1-chome Shinonome, Koto-ku, Tokyo No. 9-1 Taisan Co., Ltd. Head Office Branch (72) Inventor Hirotoshi Murata 8-1, 5th Ageo-cho, Yao City, Osaka Prefecture Naniwa Reactor Research Institute Co., Ltd.

Claims (3)

[Claims] 1. A furnace body, which is formed in a cylindrical shape having openings at both ends and is rotatably supported about a cylinder axis, and a lid body equipped with a burner and opening and closing one of the openings by a driving means. In a rotary melting furnace provided with the driving means, the driving means includes an opening / closing mechanism for directly moving the lid body along the cylindrical axis line, and a retracting mechanism for transferring the lid body from the cylindrical axis line. And a rotary melting furnace. 2. The rotary melting furnace according to claim 1, wherein the retracting mechanism horizontally swings the lid. 3. A furnace body which is formed in a cylindrical shape having openings at both ends and is rotatably supported around a cylindrical axis, and a lid body which is equipped with a burner and which opens and closes one of the openings by a driving means. In the rotary melting furnace provided with, the said lid has a buffer mechanism which absorbs expansion and contraction of the said furnace body in the said cylinder axial direction in the state which closed the said opening, The rotary melting furnace characterized by the above-mentioned.