JPH0426436Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a furnace that is housed in a pit dug under the floor of a factory, and one side edge of the upper end of the pit is pivotally connected to a support frame. The present invention relates to a safety fence device for a tilting furnace such as a low frequency melting furnace, which comprises a main body and a drive device such as a hydraulic cylinder for tilting the furnace main body around the pivot axis.

(Prior Art) In the conventional tilting furnace described above, the furnace body is tilted from a vertical position to a nearly horizontal position by the operation of the driving device, and contents such as molten cast iron are discharged to the outside (for example, the furnace body is tilted from a vertical position to a nearly horizontal position). When filling the pot), a large gap was created between the opening of the pit and the furnace body, and there was a risk that workers could fall into the pit through this gap. In this type of tilting furnace, the depth of the pit ranges from several meters to nearly 10 meters, so
In the unlikely event that a worker falls or equipment falls,
Extreme damage to people and property.

(Problems to be solved by the invention) The invention provides a safety fence to prevent people and equipment from falling into the pit from the gap between the furnace body and the pit opening when the tilting furnace is tilted. This safety fence moves in conjunction with the furnace body, and when the furnace body is stored in the pit, it is housed together in the pit and is automatically established above the floor surface in conjunction with the tilting of the furnace body. The object of the present invention is to provide a device that can perform the following tasks.

(Means for solving the problem) The present invention was devised to achieve the above object, and is stored in a pit dug under the factory floor. A furnace body pivotally mounted on a support frame, a drive device such as a hydraulic cylinder for tilting the furnace body around the pivot axis, and a driving device such as a hydraulic cylinder arranged along the side of the furnace body and connected to the furnace body so as to be relatively displaceable. and a raised floor that is pivotally connected to the factory floor adjacent to the other side edge of the upper end of the furnace body, and to the free end of which the fence member is pivotally connected, and when the furnace body is in the pit. When stored in the pit, the raised floor assumes a collapsed position forming an extension of the factory floor, the fence member is substantially housed inside the pit, and the furnace body is tilted by the operation of the drive device. This prevents people and equipment from falling into the pit through the gap between the furnace body and the pit opening when the raised floor rotates to the upright position and the fence member is raised above the factory floor. The gist of the present invention is a safety fence device for a tilting furnace, which is characterized in that it is configured to prevent the above.

(Function) According to the present invention, when the furnace body is in the pit, it is accommodated in the pit together with the furnace body, and when the furnace body is tilted, it is erected on the factory floor, and people and objects fall into the pit. The safety fence that prevents this from happening automatically moves out of the pit due to the tilting displacement of the furnace itself, without the use of any special drive device.
In addition to ensuring safety when the furnace body is tilted,
Does not impair the usability of the factory floor when the furnace body is stored in the pit (i.e. does not protrude onto the floor)
It is something. In addition, when the furnace body tilts, the factory floor facing the bottom of the furnace is used as a flip-up floor, and the flip-up floor is automatically erected in conjunction with the tilt of the furnace body. A member is constructed.

(Example) Examples of the present invention will be specifically described below with reference to the accompanying drawings. Reference numeral 10 in the figure indicates the factory floor, and 1
2 is a pit dug below the floor surface 10.
A tilting furnace, generally designated 14, is housed within the pit 12, such as a low frequency melting furnace. The melting furnace 14 has one side edge of its upper end (the right edge in FIG. 1).
A furnace body 18 pivotally attached to a support frame 16 established in the pit 12, a lid member 20 covering the upper end opening of the furnace body 18, and the side opposite to the pivoting edge of the furnace body 18, that is, the other side. A cam plate 22 is disposed vertically in the center of the rim, and is mounted on both sides of the furnace body 18, and can freely rotate around an axis substantially parallel to the pivot axis of the furnace body. A groove-type roller 24 is provided. (Note that since the melting furnace 14 is a low frequency furnace,
Although power supply lines for heating and other accessories are provided, illustrations and explanations are omitted because they are not directly related to the present invention. ) The lid member 20 can rotate around the support shaft 26, and by rotating the lid member from the closed position to the open position, the furnace body 18 can be rotated.
The upper opening is opened, and scrap iron, which is a raw material for molten cast iron, pig iron, and other additives can be charged through the opening. Inside the pit 12, the lower end is pivotally attached to a pivot fitting in the pit, and the upper end is attached to the furnace body 18.
A pair of hydraulic cylinders 28 are pivotally mounted on the sides of the furnace body 18, and by supplying working pressure oil to the hydraulic cylinders 28 and extending their piston shafts, the furnace body 18 can be moved as shown by the solid line in FIG. It can be tilted as shown. The upper surface 18' of the furnace body 18 is inclined so as to form an angle of 50 degrees to 100 degrees with respect to the horizontal plane,
By repeatedly increasing and decreasing the inclination angle within the above angle range, the required amount of molten metal can be taken out into a ladle (not shown) from the tap 30 shown in the front of FIG. 2. In addition, a pair of supports 32 are erected within the pit 12, and as shown by the two-dot chain line in FIG. When energized), a contact portion 34 provided on the side surface of the furnace body is supported on its top surface so that the weight of the furnace body and contents is not applied to the hydraulic cylinder 28.

A flip-up floor 36 is pivotally mounted along the edge of the floor surface 10 that limits the pit opening on the side opposite to the pivot edge of the furnace body 18, and below both sides of the flip-up floor 36 are fan-shaped auxiliary A safety fence or wire mesh 38 is provided. Further, a rolling roller 40 is supported on the central lower surface near the free end edge of the flip-up floor 36, and when the furnace body 18 is tilted, the roller 40
2, the flip-up floor 36 rotates from a lying position (located on an extension of the floor surface 10) shown by a two-dot chain line in FIG. 1 to an upright position shown by a solid line in the same figure. Furthermore, at both ends of the raised floor 36,
One side of a fence member 42 is pivotally attached to a fence member 42, which has a number of vertical tubes or rod members arranged in a pitch that can prevent people or equipment from falling into the pit 12. The fence member 42 includes a guide member 44 made of two parallel tubes or rod members, and as shown in an enlarged view in FIG. 3, the grooved roller 24 is sandwiched between the upper and lower guide members 44. equipped.

In the above structure, during the melting operation of the molten metal raw material, the melting furnace 14 is housed in the pit 12, as shown by the two-dot chain line in FIG. . Further, the flip-up floor 36 is located at an extension of the floor surface 10, and the auxiliary safety wire mesh 38 is below the floor surface, and one end is pivotally attached to the free edge of the flip-up floor 36, while two guide members The fence member 42, which holds the grooved roller 24 on the furnace body 18 by means 44, is housed in the pit 12 under the floor surface, as only its outline is shown by the two-dot chain line in FIG. Therefore, there are no protrusions on the floor around the furnace 14 that would interfere with various operations, and workability is excellent. Next, when the melting operation is completed and hydraulic oil is supplied to the hydraulic cylinder 28 in order to take out the molten metal from the furnace 14, the furnace body 18 rotates around its pivot in a clockwise direction in FIG. 1. Immediately after the furnace body 18 starts tilting, a rolling roller 40 protruding from the lower side of the raised floor 36 is attached to the cam plate 22.
contact, and the raised floor 36 begins to rise.
Since the fence member 42 is pivotally connected to the flip-up floor 36 near one end thereof, the fence member 42 begins to displace together with the flip-up floor 36, and on the other hand, as the furnace body 18 tilts, the grooved roller 24 is displaced and the cooperating guide Since the displacement of the member 44 is restricted, it is raised upward. In this way, the upper surface 1 of the furnace body 18
8' is tilted to a position making an angle of 45° with respect to the horizontal plane, approximately the upper half of the fence member 42 is aligned with the floor surface 10.
It protrudes upward and is most frequently used when taking out hot water.
The fence member 42 assumes a substantially horizontal position near 60 degrees to 70 degrees, and maintains a nearly horizontal position even when tilted to near 100 degrees. On the other hand, when the furnace body 18 is tilted by 45 degrees, the flip-up floor 36 has already rotated close to the highest upright position, and the auxiliary safety wire mesh 38 has also rotated to a sufficient height above the floor surface. Therefore, the fence member 42 and the auxiliary safety wire mesh 38, as well as the raised floor 3
6 work together to effectively prevent personnel or equipment from falling into the pit 12 during the tilting of the furnace body 18. In addition, after the tapping work is completed, the furnace main body 1 is
8 is accommodated in the pit 12, and at this time, the fence member 42 and the raised floor 36 are operated in a manner opposite to that described above.
returns to its original position. As is clear from the above description, no special power source is required to drive the fence member 42 and the raised floor 36, and the movement between the inside of the pit 12 and the floor surface is automatically linked to the tilting of the furnace 14. The structure is simple and inexpensive, and the running cost is also low.

(Effect of the invention) As mentioned above, the tilting furnace safety fence device according to the invention is stored in a pit dug under the factory floor, and one side edge of the upper end is attached to a support frame. A pivotally mounted furnace body, a drive device such as a hydraulic cylinder that tilts the furnace body around the pivot axis, and a fence member disposed along the side of the furnace body and connected to the furnace body so as to be relatively displaceable. , and a raised floor pivotally connected to the factory floor surface adjacent to the other side edge of the upper end of the furnace main body, and having a free end thereof pivotally connected to the fence member,
When the furnace body is stored in the pit, the raised floor occupies a collapsed position forming an extension of the factory floor, and the fence member is substantially housed inside the pit, and the raised floor is in a collapsed position forming an extension of the factory floor, and the fence member is substantially housed inside the pit, and When the furnace body is tilted, the raised floor is rotated to the upright position and the fence member is raised above the factory floor, allowing people and equipment to escape from the gap between the furnace body and the pit opening. It is characterized by a structure that prevents people and equipment from falling into the pit, and is extremely useful in practice as it can effectively prevent people and equipment from falling into the pit with a simple and inexpensive structure. It is.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a front view of FIG. 1, and FIG. 3 is a partial sectional view taken along the line - in FIG. 1. 10... Floor surface, 12... Pit, 14... Melting furnace, 16... Support frame, 18... Furnace body, 20...
... Lid member, 22 ... Cam plate, 24 ... Groove roller, 28 ... Hydraulic cylinder, 32 ... Support column, 36
... Raised floor, 38 ... Auxiliary safety wire mesh, 40 ...
... Rolling roller, 42 ... Fence member, 44 ... Guide member.

Claims (1)

[Scope of utility model registration request] Stored in a pit dug beneath the factory floor,
A furnace body with one side edge of its upper end pivotally connected to a support frame, a drive device such as a hydraulic cylinder for tilting the furnace body around the pivot axis, a drive device such as a hydraulic cylinder arranged along the side of the furnace body, a fence member connected to the main body so as to be relatively displaceable; and a raised floor that is pivotally connected to the factory floor surface adjacent to the other side edge of the upper end of the furnace main body, and to the free end of which the above-mentioned fence member is pivotally connected. When the furnace body is housed in the pit, the raised floor occupies a collapsed position forming an extension of the factory floor, the fence member is substantially housed inside the pit, and the drive device When the furnace body is tilted during operation, the raised floor rotates to the upright position and the fence member is raised above the factory floor, allowing people and equipment to escape from the gap between the furnace body and the pit opening. A safety fence device for a tilting furnace, characterized in that it is configured to prevent the metal from falling into the pit.