JPH0214852Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a cover for a centrifugal casting machine.

In a centrifugal casting machine, dust and smoke are generated during brushing of the inner surface of the rotating metal frame and during casting, and a large amount of steam is generated after casting is completed because water is injected into the rotating metal frame to cool it. Therefore, it is advantageous to cover both sides and the top of the casting machine with a cover with a suction hood, but if the type of product to be cast is changed, the rotating metal frame in the cover must be replaced.

In order to facilitate this replacement, conventionally, as shown in FIGS. 1 and 2, cover plates 4 are erected on both sides of a casting machine 3 configured to support a rotating metal frame 2 on a rotating roller 1. A plurality of guide rails 5 are provided so as to be movable in the longitudinal direction between a state where they are installed between the upper ends of both cover plates 4 and a state where they are retracted to the side of the cover plate 4, and are movable on the guide rails 5. the upper cover 6 on the guide rail 5
By moving the guide rail 5 along the cover plate 4, the casting machine Since the upper part of the rotating metal frame 3 is opened, the rotating metal frame 2 can be easily replaced using a crane or the like. Note 7
is a suction hood, which is attached to the upper lid 6 in this example.

A support pedestal 8 is provided on the side of the cover plate 4, and the support pedestal 8 supports the guide rail 5, a drive device 9 for the guide rail 5, and a drive device 10 for the top cover 6. That is, as shown in FIG. 3, a plurality of support beams 11 are provided at the upper end of the support frame 8, and a plurality of support rollers 12 provided along the longitudinal direction of the support beams 11 move the guide rail 5. is supported. A frame 13 corresponding to the guide rail 5 is attached to the upper lid 6, and this frame 13
A roller 14 that can freely rotate on the guide rail 5 is provided. These allow the guide rail 5 to move on the support beam 11, and the upper lid 6 to move on the guide rail 5, respectively.

To explain the drive device 9, a pair of sheaves 15 are rotatably arranged at both ends of the support beam 11, and a string-like body 16 is wound around the pair of sheaves 15. Reference numeral 17 denotes a connecting rod that projects from the web 18 of the guide rail 5 and is connected to the string-like body 16. 19 is one sheave 15
This motor 19 is a motor for driving the
A sprocket 20 attached to the output shaft of the sheave 15 and a sprocket 21 directly connected to the sheave 15 are interlocked by a chain. Therefore, the motor 19
By driving the sheave 15, the string-like body 16
The guide rail 5 is then moved via the connecting rod 17.

In FIG. 2, a drive device 10 for the top cover 6 drives a connecting rod 22 fixed to the top cover 6, as shown by the imaginary line in FIG. 3, with the same configuration as the drive device 9 for the guide rail 2. It's becoming like that.

However, in such a conventional device, since the connecting rod 17 is provided protruding from one side of the web 18 of the guide rail 5 and is driven, the guide rail 5 tends to twist, and as a result, the guide rail There is a problem in that the top cover 6 that moves over the cover 5 is easily deformed. Further, the connecting rod 17 is driven using the string-like body 16, but as described above, the connecting rod 17 is driven by the casting machine 3.
Since smoke and steam are generated from the cord, there is a problem in that the string-like body 16 is susceptible to corrosion.

Therefore, the present invention aims to prevent the occurrence of twisting in the guide rail, and also to prevent the occurrence of corrosion as in the conventional guide rail.

In order to achieve this purpose, the present invention has a pair of cover plates installed on both sides of the casting machine, and a state where the cover plates are installed between the upper ends of the cover plates and a state where they are retracted to the side of the cover plates. A cover for a centrifugal casting machine includes a plurality of guide rails that are movable in the longitudinal direction, and an upper cover that is movable on the guide rails. a drive device provided on the top cover, having a pair of pinions meshed with both racks and interlocked with each other; and a means for fixing the device to the device.

Therefore, since both sides of the web of the guide rail can be driven with an equal force, it is possible to prevent twisting of the guide rail, and as a result, deformation of the top cover that moves on the guide rail can be prevented. It can be prevented. Furthermore, since a rigid rack is used instead of the conventional thin string-like body, it is advantageous in terms of corrosion problems. moreover,
Since the structure is such that the top cover and the guide rail are moved by only a single drive device, the device can be simplified.

Examples of the present invention will be described below. Fourth
The figure is a plan view of the upper lid 6, and 7 is a suction hood similar to that described above. A plurality of guide rails 5 (five in this example) are provided at appropriate intervals along the longitudinal direction of the casting machine, that is, the upper lid 6, and the ends of these guide rails 5 remote from the upper lid 6 are connected to each other by connecting rails 31. Fixed. 32 is a reinforcing rib.

Next, the drive device for the guide rail 5 will be explained in detail. As shown in FIGS. 4 to 6, a motor 34 with a sprocket 33 is provided on the top cover 6, and a rotating shaft 37 with a sprocket 36 that receives driving force from the motor 34 through a chain 35 is provided. . This rotating shaft 37 is arranged horizontally along the longitudinal direction of the upper lid 6 and is supported by a bearing 38. Rotating shaft 37 corresponding to each guide rail 5
Each section is provided with another sprocket 39.

On the edge of the top cover 6 corresponding to the guide rail 5,
A plurality of speed reducers 42 are provided, each having a sprocket 41 that receives driving force from a sprocket 39 through a chain 40, and a large gear 44 is attached to a vertical output shaft 43 of the speed reducer 42. 45A is a first small gear that meshes with the large gear 44, and 45B is a second small gear that meshes with the first small gear 45A.
are respectively attached to vertical rotating shafts 48A and 48B supported by bearings (not shown) in a bearing case 47 attached to a support member 46 from the upper lid 6. Further, the small gears 45A and 45B have the same number of teeth. Both rotating shafts 48A,
The lower end portion of 48B is arranged to sandwich the guide rail 5, and opposing pinions 49A and 49B are attached to both sides of the web 18 of the guide rail 5, respectively. The drive device 50 is configured as described above, and this drive device 50 is located at the side edge of the upper lid 6 on the support pedestal 8 side.

On the other hand, on both sides of the web 18 of the guide rail 5,
Roller type racks 51A, 51B are provided along the longitudinal direction of the guide rail 5, meshing with each pinion 49A, 49B. In addition, Figures 7 to 8
As shown in the figure, the racks 51A and 51B are provided only on the portion of the guide rail 5 excluding the portion between the upper ends of the cover plate 4, and are not provided on the portion of the guide rail 5 between the upper ends of the cover plate 4. As will be described later, a rack 51 is attached to the guide rail 5 between the upper ends of the cover plate 4.
This is because both the guide rail 5 and the upper lid 6 can be moved without providing A and 51B. Further, as shown in FIG. 4, the drive device 50 and the racks 51A, 51B are provided corresponding to only the guide rail 5 at the center of the top cover 6, excluding both front and rear ends. The guide rails 5 at both ends are interlocked by a connecting rail 31.

Note that the guide rail 5 and the upper lid 6 are connected to the support roller 12 and the roller 14 similarly to the one in FIG.
Each is supported through.

In such a configuration, when the motor 34 of the drive device 50 is operated, the large gear 44 is rotated via the rotating shaft 37 and the reduction gear 42, and the small gear 4 is rotated.
5A, 45B, that is, pinions 49A, 49B are driven to rotate at a constant speed in mutually opposite directions. This causes the upper lid 6 and the guide rail 5 to move relative to each other.

Next, the opening/closing operation of the upper lid 6 will be explained based on FIGS. 7 and 8. FIG. 7 shows a state in which the casting machine 3 is in operation, in which a guide rail 5 is installed between the upper ends of the cover plate 4, and the casting machine 3 is covered with an upper lid 6.

When the casting work is completed, the guide rail 5 is fixed to a member fixed at a predetermined position, such as the support beam 11 or the support frame 8, using fixing means such as a pin, and the drive device 5 is fixed.
0 is operated to move only the top cover 6, and as shown in FIG. 7, it is sent out onto the support frame 8. Once the top cover 6 has been moved onto the support frame 8 as shown in FIG. 8, the top cover 6 is fixed with a fixing means such as a pin, and the guide rail 5 is unfixed.
The drive device 50 is operated again. Then, the guide rail 5 moves, and the part sandwiched between the support beam 11 and the upper cover 6 receives the weight of the upper cover 6, so that the weight balance is maintained by the upper cover 6. , are retracted to the side of the cover plate 4. In this way, the drive device 50 is provided on the side edge of the upper lid 6 on the side of the support frame 8, and the drive device 50 that engages with the racks 51A, 51B of the fixed guide rail 5 is operated.
By moving the guide rail 5 through the racks 51A and 51B and operating the drive device 50 with the upper cover 6 fixed on the support frame 8,
Therefore, the upper cover 6 and the guide rail 5 can be moved together without providing racks 51A and 51B in the guide rail 5 portion between the upper ends of the cover plate 4 in FIGS. 7 and 8. Can be done.

This opens the upper part of the casting machine 3, so
The rotating metal frame 2 is carried out using a crane or the like, and the other rotating metal frame is carried in. Thereafter, the upper lid 6 is moved to close, but in this case, the guide rail 5 is first sent out, contrary to the opening movement, and then the upper lid 6 is moved to return to the state shown in FIG. 7.

As described above, according to the present invention, since both sides of the web 18 of the guide rail 5 can be driven with equal force, it is possible to prevent the occurrence of twisting in the guide rail 5, and it is possible to prevent the occurrence of twisting in the guide rail 5. It is also advantageous in terms of corrosion problems compared to those that utilize it. Note that the drive device 50 includes a string-like chain 35,
40, but these are the upper lid 6 as shown in the figure.
Since the upper cover 6 prevents these from being exposed to smoke and steam from the casting machine 3, no problem occurs. Furthermore, the upper lid 6 and the guide rail 5 are moved by a single drive device 5.
It can be moved by just 0.

[Brief explanation of the drawing]

Figures 1 to 3 show a conventional example, Figure 1 is a front view, Figure 2 is a plan view, Figure 3 is a diagram showing the drive device, and Figures 4 to 8 are one embodiment of the present invention. Give an example,
4 is a plan view, FIG. 5 is an overall view of the drive device, FIG. 6 is a diagram showing the meshing state of the rack and pinion, and FIGS. 7 to 8 are explanatory views of the operation. 2... Rotating metal frame, 3... Casting machine, 4... Covering plate,
5...Guide rail, 6...Top lid, 8...Support frame, 18...Web, 34...Motor, 37...
Rotating shaft, 42...Reduction device, 44...Large gear, 4
5A...First small gear, 45B...Second small gear, 48A, 48B...Rotating shaft, 49A, 49B
... Pinion, 50 ... Drive device, 51A, 51
B...Lack.

Claims (1)

[Claims for Utility Model Registration] A pair of cover plates installed upright on both sides of the casting machine, and the length of the cover plate between the state where it is installed between the upper ends of the cover plate and the state where it is retracted to the side of the cover plate. A cover for a centrifugal casting machine comprising a plurality of guide rails movable in the direction and an upper cover movable on the guide rails, the cover having racks provided longitudinally on both sides of the guide rails. a drive device provided on the top cover, having a pair of pinions meshed with both racks and interlocked with each other; A cover for a centrifugal casting machine, comprising: means for securing to;