JPH0646592Y2 - Vertical work heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vertical work heating apparatus in which a vertical heating furnace having a work inlet at the upper end and a work outlet at the lower end is installed.

INDUSTRIAL APPLICABILITY The present invention can be used in, for example, a vertical work heating device of a method of heating a hot forging material or a heat-treated material by induction heating.

[Prior Art] Conventionally, as a work heating device for heating a work, for example, a hot forging material, a vertical work heating device is known. This vertical work heating device has a work entrance formed at an upper end, a work exit formed at a lower end, and a work passage that extends in the vertical direction and connects the work entrance and the work exit.

When heating the hot forging material using the vertical type work heating device, insert a number of hot forging materials in series from the work inlet to the work passage with the work outlet closed. The work passage is filled up and the hot forging material is heated in that state. Then, one hot forging material is discharged from the work outlet. Then, one hot forging material inserted in series is naturally dropped, so that there is a space for one hot forging material on the work inlet side. Therefore, a so-called dharma dropping method that utilizes a natural falling phenomenon, such as inserting one hot forging material from the work inlet, is adopted.

In the conventional vertical work heating device that employs the dullama dropping method as described above, the hot forging material that was inserted at the work inlet side, which is the upper end at the start, gradually falls,
It is heated to a high temperature of about 00 ° C to 1200 ° C and discharged from the work outlet at the lower end.

[Problems to be Solved by the Invention] In the above-described conventional vertical work heating device, when trying to heat a hot forging material having a small diameter, the work passage of the vertical heating furnace is The air gap between the peripheral portion and the outer peripheral portion of the hot forging material is increased, the hot forging material is not effectively heated, and the heating efficiency is reduced.
For example, in the case of an induction heating type work heating device, since the diameter of the hot forging material is small, the gap between the induction coil embedded in the vertical heating furnace and the hot forging material becomes large, Heating efficiency decreases.

When heating a hot forging material with a large diameter, the hot forging material cannot be inserted into the work passage unless the diameter of the work passage of the vertical heating furnace is increased. Therefore, it is impossible to heat a hot forging material having a large diameter.

Furthermore, if the vertical heating furnace being used fails, it is necessary to replace the failed vertical heating furnace with a normal vertical heating furnace.

When heating hot forging materials with different diameters as described above, or when the vertical heating furnace fails,
The vertical heating furnace must be replaced, but this replacement work takes time.

The present invention has been made in view of the above situation, and its purpose is to heat a work such as a hot forging material having a different diameter, or to use a vertical heating furnace when the vertical heating furnace fails. It is an object to provide a vertical work heating device that can quickly replace a workpiece.

[Means for Solving the Problems] The vertical work heating device of the present invention is provided with a swing center part, a work supply part, and one work position which is located below the work supply part and on which a work can be placed. A frame having a work discharge part, a horizontal swinging member disposed on the frame so as to swing substantially horizontally around the swinging center around the swinging center, and the swinging center. Direction, the work inlet is provided at a predetermined interval in the horizontal swing member and is provided at the upper end so as to face the work supply section, the work outlet provided at the lower end so as to face the work discharge section, the work inlet, and At least two vertical heating furnaces having a work passage that connects the work outlets in the vertical direction, and a vertical heating furnace that is vertically movable in the frame and faces the work discharge portion of the vertical heating furnace. Workpiece from this work outlet to the heating furnace It is inserted so that it can be taken in and out of the passage,
It is composed of one vertical rod-shaped work receiving part on which the work heated in the work passage of the vertical heating furnace can be placed when it is inserted. It is characterized in that the work receiving portion is lowered and removed from the vertical heating furnace when it is horizontally swung.

Further explanation will be added. The frame has a swing center part, a work supply part, and a work discharge part located below the work supply part. The swing center can be a vertically extending column or a vertically extending pivot. The work supply unit supplies the work to the work passage of the vertical heating furnace, and can be, for example, a work storage basket or a chute. The work discharge part receives the work discharged from the vertical heating furnace.

The horizontal swing member is swingable about the swing center in a substantially horizontal direction around the swing center. The horizontal rocking member may have, for example, a large number of arm structures radially arranged around the rocking center portion, or a disc structure that rotates around the rocking center portion.

The vertical heating furnace is composed of at least two vertical heating furnaces and is held by the horizontal rocking member at a predetermined interval in the direction around the rocking center portion. Here, the number of the vertical heating furnaces is appropriately set as necessary in consideration of the type of the diameter dimension of the work, the failure rate of the vertical heating furnace, the cost, the productivity, etc., for example, 3 to 5 can do. At the upper end of the vertical heating furnace, a work inlet that can face the work supply portion of the frame is formed. Further, a work outlet that can face the work discharge portion of the frame is formed at the lower end of the vertical heating furnace. Furthermore,
The vertical heating furnace is provided with a work passage that connects the work inlet and the work outlet in the vertical direction.

The diameters of the work inlet, the work outlet, and the work passage of the vertical heating furnace may be different for all the vertical heating furnaces, or may be the same for all the vertical heating furnaces. The former case is advantageous for heating works of different diameters. The latter case is advantageous when the vertical heating furnace fails.

It is desirable to provide a horizontal rocking member that is rotated in the horizontal direction or a stopper member that fixes the vertical heating furnace at that position. By providing the stopper member in this manner, it is possible to prevent the problem that the vertical heating furnace is displaced during use.

The work receiving portion is inserted into and out of the work passage from the work outlet of the vertical heating furnace, and has a work receiving surface on which the work is placed and received at the time of insertion. As the work receiving portion, it is desirable to use a dummy member having a diameter close to the diameter of the work. The dummy member is provided so that it can be inserted into the work passage of the vertical heating furnace and can be vertically moved up and down. A work receiving surface for receiving a work is formed on the dummy member. The work receiving surface can be formed of a material having excellent heat conductivity such as metal. The reason is that when the work is heated by the induction heating method, the work end surface where the magnetic flux tends to concentrate tends to become hot, and the heat of the work end surface is transferred by the work receiving surface with excellent heat conductivity. This is because.

[Operation] The work receiving part is raised and inserted into the work passage from the work outlet of the vertical heating furnace. In this state, the works are successively inserted into the work passages from the work inlet of the vertical heating furnace through the work supply section of the frame. Therefore, in the work passage, the works are vertically arranged in series. In this way, the works are heated in a tandem state. At this time, the lowermost work is received by the work receiving surface of the work receiving portion. As the number of works inserted in the work passage of the vertical heating furnace increases, the work receiving portion is lowered. When the works inserted in a vertical state in the work passage of the vertical heating furnace are full, the work receiving portion is lowered below the work outlet of the vertical heating furnace and removed from the work passage. At this time, the work at the bottom is placed on the work discharge part. Then, when it is time to raise the temperature of the lowermost work to a predetermined temperature, the lowermost work is taken out from the work outlet of the vertical heating furnace. At the time of taking out, if the lowermost work is hit from the side, the hit work is ejected to the side in a so-called Daruma drop type and taken out.

By the way, when the vertical heating furnace is replaced, the horizontal rocking member is rotated in the horizontal direction about the center of the rocking movement, whereby the vertical heating furnace is rotated in the horizontal direction and replaced. At this time, if the work receiving part is inserted in the work passage of the vertical heating furnace, it will hinder the replacement, so lower the work receiving part and remove it from the work outlet of the vertical heating furnace. Is placed outside the work passage. The workpiece inlet of the exchanged vertical heating furnace faces the workpiece supply section, and similarly, the workpiece outlet of the exchanged vertical heating furnace faces the workpiece discharge section of the frame.

In this state of facing each other, the workpieces are sequentially inserted into the work passages from the work inlet of the vertical heating furnace through the work supply portion of the frame as described above, so that the work passages are filled with the work. In the state, a large number of columns are arranged in series and the work is heated in the column state.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. This embodiment is used for induction heating a forging material during hot forging.

(Structure of Embodiment) The frame 1 includes horizontal frames 2 and 3 and vertical frames 4, 5 and
Is equipped with. A column 8 as a swing center is vertically provided on the horizontal frame 3 via a bracket 8a.
The pillar 8 has a circular cross section, and upper arms 9a, 9b, and 9c as horizontal rocking members are held on the upper portion of the pillar 8 at predetermined intervals. Similarly, lower arms 10a, 10b and 10c as horizontal rocking members are held at the same intervals on the lower portion of the furnace supporting column 8. Then, the upper arm 9a and the lower arm 10
A vertical heating furnace 12a is mounted horizontally via a, that is, in the direction of arrows P1 and P2 shown in FIG. Similarly, the vertical heating furnace 12b is horizontally swingably attached about the support column 8 via the upper arm 9b and the lower arm 10b. Similarly, a vertical heating furnace 12c is horizontally swingably mounted around the support column 8 via the upper arm 9c and the lower arm 10c.

As can be seen from FIGS. 4 and 1, the lower arm 10
A rotary roller 15 is attached to a, 10b, and 10c via a fixture 14. The rotating roller 15 rolls along the upper surface 3a of the horizontal frame 3.

Each of the vertical heating furnaces 12a, 12b and 12c has an induction coil built therein. As shown in FIG. 1, a work inlet 17a having an inner diameter D1 is formed at the upper end of the vertical heating furnace 12a, and a work outlet 18a is formed at the lower end.
A work passage 19a extending in the vertical direction is formed to connect 7a and the work outlet 18a. As shown in FIG. 4, a work inlet 17b having an inner diameter D2 is formed at the upper end of the vertical heating furnace 12b, and a work outlet 18b is formed at the lower end to connect the work inlet 17b and the work outlet 18b. A work passage 19b extending in the vertical direction is formed.

Similarly, a work inlet 17c having an inner diameter D3 is formed at the upper end of the vertical heating furnace 12c, a work outlet 18c is formed at the lower end, and a work passage extending in the vertical direction connecting the work inlet 17c and the work outlet 18c is formed. A path 19c is formed. here,
The dimensional relationship of D1, D2, and D3 is set to D3 <D1 <D2.

Further, as shown in FIG. 1, a clamp device 20 is provided on the workpiece outlet 18a side of the vertical heating furnace 12a. Similarly, the vertical heating furnaces 12b and 12c are also provided with the clamp device 20. The clamp device 20 has V-grooves facing each other.
It is formed of a pair of chucks 20a and a cylinder (not shown) that opens and closes the pair of chucks 20a.

As shown in FIG. 1, the frame 1 is provided with a drive mechanism 21. The drive mechanism 21 includes a screw shaft 22, a motor 23, a lifting arm 24, and a guide rod 25. The screw shaft 22 is rotatably held between the horizontal frames 2 and 3 by holders 27 and 28. On the outer peripheral portion of the screw shaft 22, a male screw portion 30 is formed over substantially the entire length of the screw shaft 22. The motor 23
It is a geared motor with a brake and is fixed to the horizontal frame 2. The guide rod 25 is arranged in parallel between the horizontal frames 2 and 3 in parallel with the screw shaft 22. The lifting arm 24 has a screw shaft.
An internal thread portion 31 is formed which is screwed into the external thread portion 30 of 22 and is capable of freely moving back and forth. A guide hole 32 is formed in the elevating arm 24, and the guide hole 32 is guided by the guide rod 25. Lifting arm 24
A dummy bar 35 as a dummy member that functions as a work receiving portion is held on the mounting surface 24a of the above in an upright state. The dummy rod 35 is made of ceramics as a refractory material. The upper end of the dummy bar 35 is the work receiving surface 35a. Here, when the motor 23 is driven, the screw shaft 22 rotates in the circumferential direction thereof at a predetermined speed, and as a result, the elevating arm 24 is guided by the guide rod 25 to ascend and descend, and consequently the dummy rod 35 ascends and descends.

As shown in FIG. 3, the horizontal frame 3 of the frame 1
A pillar 38 is erected on the pillar 38.
An arm 39 is held at the workpiece inlet 17a side of a. An air cylinder device 42 for supplying a work is installed on the arm 39. A lid member 44 is attached to the piston rod 43 of the air cylinder device 42 for supply. The lid member 44 opens and closes the work inlet 17a. Furthermore, the arm 39 has a basket-like work input tool as a work supply unit.
45 is provided near the work entrance 17a.

Further, as shown in FIG. 1, the horizontal frame 3 of the frame 1 is provided with a work discharge part 49 facing the work outlet 18a. Further, an air cylinder device 46 for discharging the work is installed at the work exit 18a side and below the clamp device 20. Air cylinder device for discharge 46
A lid member 48 is attached to the piston rod 47.
The lid member 48 opens and closes the work outlet 18a.

Further, in the present embodiment, as shown in FIG. 4, the vertical heating furnace 12a has a one-touch insertion type water supply / drainage valve 3.
3a, a one-touch insertion type power supply terminal portion 34a is provided. Then, the tip end of the cable 36a of the electric device 36 is connected to the power feeding end 34a with a one-touch insertion structure to energize the induction coil of the vertical heating furnace 12a. In addition, connect the tip of the hose 37a of the water supply / drainage device 37 to
The vertical heating furnace 12a is connected to 3a by a one-touch insertion structure, which allows water to pass through a cooling pipe built in the vertical heating furnace 12a to cool the vertical heating furnace 12a.

Similarly, the vertical heating furnace 12b is also provided with a one-touch plug-in type water supply / drainage valve 33b and a power supply terminal portion 34b.
The vertical heating furnace 12c is also provided with a one-touch plug-in type water supply / drainage valve 33c and a power supply terminal portion 34c.

In this embodiment, as shown in FIG. 4, the frame 1 is provided with a stopper member 41. The stopper member 41 locks and fixes the vertical heating furnaces 12a, 12b, 12c in a state of facing the work discharge part 49 and the work input tool 45, respectively.

(Operation of Embodiment) Next, the operation of the vertical work heating device of this embodiment will be described together with the method of using it. First, a round bar-shaped hot forging material W as a work is cut out. The diameter of the hot forging material W corresponds to the inner diameter of the work inlet 17a of the vertical heating furnace 12a. Further, the vertical heating furnace 12a is fixed to the position shown in FIG. 4 by the stopper member 41. The material of the hot forging material W is carbon steel, case hardening steel or the like.

Now, at the start of the heating process, the hot forging material W is inserted into the work input tool 45. Then, the air cylinder device 46 is operated to retract the piston rod 47 and the lid member 48, thereby opening the work outlet 18a. In this way, with the work outlet 18a open, the motor 23 is driven to rotate the screw rod 22 in the circumferential direction, whereby the elevating arm 24 is raised along the guide rod 25 and the dummy rod 35 is raised. . As a result, as shown in FIG.
Almost all of 35 is inserted into the work passage 19a of the vertical heating furnace 12. Then, the air cylinder device 42 is operated to retract the piston rod 43 and the lid member 44, and the work inlet 17a
Open up.

In this state, the first hot forging material W in the shape of a round bar, which has been inserted into the work insertion tool 45, is inserted from the work inlet 17a, and the hot forging material W is the dummy bar 35.
It is placed on the workpiece receiving surface 35a. Then, the air cylinder device 42 is operated to operate the piston rod 43 and the lid member 44.
To close the work inlet 17a.

In this state, while continuing heating by energizing the induction coil of the vertical heating furnace 12a from the electric device 36 via the cable 36a,
The motor 23 is driven to rotate little by little, and the dummy rod 35 is continuously lowered in small amounts. Then, when the dummy bar 35 is lowered by the height dimension of one hot forging material W, the air cylinder device 42 is operated to retract the piston rod 43 and the lid member 44 and open the work inlet 17a again. Then, the second hot forging material W is fed from the work inlet 17a to the work passage 1
Insert in 9a. After the insertion as described above, the air cylinder device 42 is operated to move the piston rod 43 and the lid member 44 forward to close the work inlet 17a again.

Then, heating is continued in this state. At this time, the motor 23
Is continuously rotated, the dummy rod 35 continuously descends. Further, similarly to the above, when the dummy rod 35 is lowered by the height dimension of one hot forging material W, the air cylinder device 42 is operated to retract the piston rod 43 and the lid member 44 and open the work inlet 17a again. Let Then, the third hot forging material W inserted into the work input tool 45
Is inserted from the work inlet 17a into the work passage 19a. After inserting in this way, the air cylinder device 42 is operated to move the piston rod 43 and the lid member 44 forward, and the work inlet
17a is closed again.

By sequentially lowering the dummy rods 35 in this manner, a large number of dummy rods 35, for example, 8 in the work passage 19a of the vertical heating furnace 12a.
Up to 15 hot forging materials W are vertically inserted in series to fill the work passage 19a, and each hot forging material W is induction-heated in a full state.

At the time of induction heating, the end surface of the hot forging material W where magnetic flux tends to concentrate tends to become high temperature, but the end surfaces of the hot forging material W inserted in the work passage 19a in a row are in contact with each other. Therefore, the heat transfer action between the end faces can be expected.

Then, when the lowermost hot forging material W received on the work receiving surface 35a of the dummy rod 35 reaches a predetermined temperature, the dummy rod 35 is further lowered as shown in FIG. Pull out from the outlet 18a. Then, the lowermost hot forging material W is discharged from the work outlet 18a to the work discharge portion 49 of the frame 1. At this time, the clamp device 20 is closed and the chuck 20a holds the second hot forging material W from the bottom, and the second hot forging material W from the bottom is the work outlet 18.
I try not to discharge from a.

After the dummy rod 35 is pulled out from the workpiece outlet 18a as described above, the air cylinder device 46 is operated to operate the lid member 48.
The work outlet 18a is closed until the next opening, and heating is continued. At this time, similarly to the conventional vertical work heating device described above, the dummy bar 35 is provided in the work passage 19a.
Therefore, the hot forging material W is discharged from the work outlet 18 by the dulma drop method using natural fall as in the conventional method.
Take out sequentially from a.

That is, in this embodiment, the air cylinder device 46 is operated as described above to intermittently advance and retract the piston rod 47 and the lid member 48, and the hot forging material W is intermittently taken out from the work outlet 18a. It is a thing. The temperature of the hot forging material W taken out is about 1000 ° C to 1200 ° C. Then, the hot forging material W taken out is transferred to a forging die by a chute or the like, and hot forged by the forging die. As a hot forging process, a rough land forging process and a finish forging process are performed, and then a deburring process is performed.

By the way, when the vertical heating furnace 12a is replaced with the vertical heating furnace 12b, such as when the diameter of the hot forging material W is changed, the cable 36a is removed from the power supply terminal portion 34a and the hose is removed.
With 37a removed from the water supply / drain valve 33a and the dummy rod 35 removed from the work passage 19a, the upper arm 9a and the lower arm 10a, the upper arm 9b, and the lower arm 1 as horizontal swing members.
0b is rotated in a horizontal direction at a predetermined angle around the column 8,
As a result, the vertical heating furnace 12b is replaced.

Then, the work inlet 1 at the upper end of the replaced vertical heating furnace 12b
7b faces the work input tool 45, and similarly, the work outlet 18b at the lower end of the replaced vertical heating furnace 12b faces the work discharge part 49. At the position where they face each other in this way, the stopper member 41
To fix the vertical heating furnace 12b, connect the cable 36a to the power supply terminal portion 34b, and connect the hose 37a to the water supply / drain valve 33b.

Then, the dummy rod 35 is inserted from the work outlet 18b into the work passage 19b in the same manner as described above, and the hot forging material W is inserted into the work heating tool 45 of the frame 1 in the vertical heating furnace in this state. Work entrance 19b from work entrance 17b at 12b
Insert one after another in b. Then, the dummy rods 35 are gradually lowered, and a large number of hot forging materials W are inserted in series in the work passage 19b in series in the longitudinal direction, and the hot forging materials W are heated in a vertical state. When the vertical heating furnace 12b is replaced with the vertical heating furnace 12c, such as when the diameter of the forging material W is changed, the cable 36a is removed from the power supply terminal portion 34b, and the hose 37a is connected to the water supply / drain valve. Remove from 33b. Further, the upper arm 9c and the lower arm 10c, which are horizontal swinging members, are rotated in the horizontal direction at a predetermined angle around the column 8 to form a stopper member.
The vertical heating furnace 12c is fixed by 41, and is replaced by the vertical heating furnace 12c.

Then, the work inlet 17c of the replaced vertical heating furnace 12c faces the work input tool 45, and similarly, the replaced vertical heating furnace is replaced.
The workpiece outlet 18c of 12c faces the workpiece discharge portion 49. With the terminals facing each other in this way, connect the cable 36a to the power supply terminal portion 34c.
And the hose 37a is connected to the water supply / drainage valve 33c.

Then, in the same manner as described above, the dummy rod 35 is inserted into the workpiece passage 17c from the workpiece outlet 18c, and while the dummy rod 35 is gradually lowered, the hot forging material W is fed into the workpiece inserting tool 45 of the frame 1.
Through the work inlet 17c of the vertical heating furnace 12c into the work passage 17c one after another in a tandem manner, and the hot forging material W is heated in the tandem manner (effect of the embodiment). When trying to heat the hot forging material W of the diameter, the upper arms 9a, 9b, 9c and the lower arms 10a, 1
The vertical heating furnaces 12a, 12b, 12c can be quickly replaced by rotating the 0b, 10c horizontally about the support column 8 by a predetermined angle. With this rotation, the rotation roller 15 travels while rolling on the upper surface 3a of the horizontal frame 3.

Particularly, in this embodiment, since the vertical heating furnaces 12a, 12b and 12c are provided with the rotating rollers 15, respectively,
The rotation of the lower arms 10a, 10b, 10c can be smoothly performed, and the vertical heating furnaces 12a, 12b, 12c can be smoothly replaced.

In this embodiment, the vertical heating furnace 12 is used at the start of the heating process.
A dummy rod 35 is inserted into one of the work passages 19a, 19b, 19c of a, 12b, 12c, and the hot forging material W is inserted into the dummy rod 35.
Since the hot forging material W can be heated in the state of being loaded, the weight of the many hot forging materials W is equal to the weight of the dummy bar 35.
The vertical heating furnace (12a, 12b, 1
The inner wall surface of the work passage (19a, 19b, 19c) of 2c) is not substantially covered. Therefore, the vertical heating furnace (12a, 12b, 12
This is advantageous for avoiding damage to the inner wall surface of the work passage (19a, 19b, 19c) in c). Also, in this embodiment, the work outlet
The hot forging material W extracted from 18a, 18b, and 18c has a high temperature from the first piece, so that the problem of burning waste material at the start of the heating process can be solved.

When the end of the heating process is approaching, the final hot forging material W is inserted from the work inlets 17a, 17b, 17c into the work passages 19a, 19b, 19c, and then the air cylinder device 42 is operated. Then, the piston rod 43 and the lid member 44 are moved forward to keep the workpiece inlets 17a, 17b, 17c closed by the lid member 44, and the hot forging material W should not be inserted from the workpiece inlets 17a, 17b, 17c. Therefore, vertical heating furnaces 12a, 12b, 12
Hot forging material W does not remain in c. Therefore, it is possible to solve the problem that a waste material is burnt at the end of the heating process.

Further, in this embodiment, since the dummy rod 35 made of the refractory material is not substantially heated by induction, it is advantageous in reducing power consumption.

Other Embodiments Another embodiment of the present invention is shown in FIG. In this example,
Upper arms 50a, 50b, 50c, 50d, 50e and 50f as horizontal rocking members are provided on the upper portion of the pillar 8 for holding the furnace at intervals of 60 degrees.
It is held so as to make one round around. Similarly, a lower arm as a horizontal rocking member is provided below the supporting column 8 for holding the furnace.
51a, 51b, 51c, 51d, 51e, 51f are held so as to make one turn around the support column 8 at the same intervals. And the upper arm
A vertical heating furnace 53a is attached via a 50a and a lower arm 51a in a horizontal direction, that is, in a swingable manner around a column 8 in the directions of arrows P1 and P2 shown in FIG. Similarly, a vertical heating furnace 53b is horizontally swingably mounted around the support column 8 via the upper arm 50b and the lower arm 51b. Similarly, upper arms 50c, 50d, 50e, 5
Vertical heating furnaces 53c, 53d, 53e, 53f are horizontally swingably attached to the support column 8 via the 0f and the lower arms 51c, 51d, 51e, 51f. The vertical heating furnace 53a
Workpiece inlet 54a, workpiece inlet 54b of vertical heating furnace 53b, workpiece inlet 54c of vertical heating furnace 53c, workpiece inlet 54d of vertical heating furnace 53d, workpiece inlet 54e of vertical heating furnace 53e, vertical heating furnace 5
The inner diameter of the work inlet 54f of 3f is different.

As shown in FIG. 5, lower arms 51a, 51b, 51c, 51d, 51
Rotating rollers 15 are attached to the e and 51f via attachments 14, respectively. The rotating roller 15 is the upper surface of the horizontal frame 3.
It rolls along a ring-shaped guide rail 55 arranged on 3a.

Also in this embodiment, the vertical heating furnaces 53a, 53b, 53c, 53
One-touch insertion type water supply / drainage valves 33a, 33b, 33c, 33d, 33e, 33f are provided at d, 53e, 53f, and further, power supply terminal portions 34a, 34b, 34c, 34d, 34e, 34f are provided. .

Also in this embodiment, basically the same operational effects as the above-mentioned embodiment can be obtained, and the vertical heating furnaces 53a, 53b, 53c, 53
The d, 53e, and 53f can be rotated in the horizontal direction, and replacement is easy.

Besides, the present invention is not limited to the above-described embodiments, but can be implemented with appropriate modifications within the scope of the invention. For example, the work is not limited to the hot forging material, and may be a heat treatment material, a hot drawing material, a hot extruding material, or the like as long as it can be heated.

Further, in the above-mentioned embodiment, the dummy rod 35 is continuously lowered, but the present invention is not limited to this, and the dummy rod 35 may be lowered intermittently. Further, in the above-described embodiment, the case is applied to the vertical heating furnaces 12a, 12b, 12c of the induction heating system, but the present invention is not limited to this, and other heating systems having a built-in heating wire or the like may be used.

[Advantage of the Invention] According to the vertical work heating device of the present invention, the vertical heating furnace can be quickly replaced when heating a hot forging material having a large diameter or when the vertical heating furnace fails. it can.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view of a state before the dummy rod is inserted into the vertical heating furnace, and FIG. 2 is a state after the dummy rod is inserted into the vertical heating furnace. FIG. 3 is a side view, FIG. 3 is a front view of the state before inserting the dummy rod into the vertical heating furnace, and FIG. 4 is a plan view. FIG. 5 is a plan view showing another embodiment of the present invention. In the figure, 1 is a frame, 8 is a column (swing center), 9a, 9
b and 9c are upper arms (horizontal rocking members), 10a, 10b and 10c are lower arms (horizontal rocking members), 12a, 12b and 12c are vertical heating furnaces, 17a, 17b and 17c are work inlets, 18a, 18b and 18c are work outlets, 19a, 19b and 19c are work passages, 21 is a drive mechanism, 22 is a screw shaft, 24 is a lifting arm, 35 is a dummy rod, a work receiving part, and 45 is a work input tool (work supply part). ) And 49 indicate work discharge parts, respectively.

Claims (1)

[Scope of utility model registration request] 1. A swing center part (8), one work supply part (45), and one work discharge part (below) which is located below the work supply part (45) and on which a work can be placed. 49) and a frame (1) having a frame (1) having a rocking center (8) so as to be rockable substantially horizontally around the rocking center (8). Installed horizontal swing members (9a, 9b, 9c, 10
a, 10b, 10c) and the horizontal swing member (9a, 9b, 9c, 10a, 10b, 10c) at a predetermined interval in the direction around the swing center portion (8) and the upper end And a work inlet (17a, 17b, 17c) provided on the lower surface and facing the work supply section (45), and a work outlet (18a, 18b, 18c) provided on the lower end and facing the work discharging section (49). , The work inlet (17a, 17b, 17
c) and at least two vertical heating furnaces (12a, 12b, 12c) having a work passage (19a, 19b, 19c) vertically connecting the work outlets (18a, 18b, 18c), and the frame In the vertical heating furnace (1), which is vertically movable and faces the work discharge part (49) of the vertical heating furnace (12a, 12b, 12c), from the work outlet of the vertical heating furnace. A vertical rod-shaped work receiving portion (35) which is inserted in the work passage so that the work heated in the work passage of the vertical heating furnace can be placed at the time of insertion. When vertically swinging each of the vertical heating furnaces (12a, 12b, 12c) around the swing center portion (8), the work receiving portion (35) is lowered to The vertical heating furnace (12a, 12b, 12c)
Vertical work heating device characterized by being removed from the work.