JPH079900Y2 - Explosion-proof hoist device - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an improved structure of an explosion-proof hoist device used for lifting and unloading heavy cargo in an environment of an oil plant.

B. Outline of the Invention The present invention is an explosion-proof hoist device used for lifting and unloading heavy loads in the environment of an oil plant.The standard fixed core has a press-fit outer peripheral surface formed around the free end opening. The fixed core of the standard hoist is additionally processed by using the fixed core of the standard hoist by additionally press-fitting and fixing the fixed flange to the flange of the explosion-proof brake cover. , The number of dedicated parts has been reduced, and inexpensive products can be provided in a short period of time.

C. Conventional Technology In general, a standard hoist device used for lifting and unloading heavy loads is usually constructed as illustrated in FIG. That is, the rotating main shaft 2 is rotationally driven by the electric motor 1, the rotating drum 4 is rotated in the forward and reverse directions via the reduction gear mechanism 3 that is interlocked with the rotating main shaft 2, and the hanging chain 5 is wound around the rotating drum 4. The material is unloaded such as cargo handling by taking it out or pulling it out.

An electromagnetic brake 6 is installed on a part of the rotary main shaft 2 so that the brake is immediately applied when the electric motor 1 stops to prevent the cargo handling from dropping during suspension.

As described above, the standard hoist device cannot be used as it is for safety in an environment where there is a risk of ignition, such as in an oil plant, so it is an explosion-proof type that complies with the explosion-proof regulations of the Japanese Industrial Standards (JIS). It is usually used by modifying it into a hoist device.

In this modification, the brake cover 7 of the electromagnetic brake 6 is replaced with a thicker explosion-proof brake cover to secure the explosion strength. Further, the fixed core 6a of the electromagnetic brake 6 is replaced with one having a special structure for explosion proof, and this and the explosion proof brake cover are screwed to secure an explosion proof joint surface. Further, the explosion-proof hoist device has been constructed by replacing the motor pinion 8 with an exclusive explosion-proof product and press-fitting an explosion-proof collar into the motor pinion 8 to secure a joint surface on the explosion proof.

D. Problem to be solved by the invention Since the conventional explosion-proof hoist device as described above generally has a smaller production volume than the standard hoist device, the larger the number of dedicated parts for explosion-proof, the more manufacturing cost. There was a problem that would be high.

In addition, the fixed core for electromagnetic brakes is a casting itself, so it has strength against explosion, but it lacks a structure for screwing the brake cover. In addition, the fixed core for explosion proof has a problem that the brake coil must be molded after machining, so that it takes time and effort to manufacture it and the manufacturing period becomes long.

The present invention has been made in view of the above points, and an object of the present invention is to provide a new explosion-proof hoist device which can utilize many parts of a standard hoist device and can be manufactured inexpensively in a short period of time without much effort.

E. Means for Solving the Problems In the explosion-proof hoist device of the present invention, a press-fitted outer peripheral surface portion is formed on the outer periphery of the free end opening of a standard type fixed core, and a fixed flange body is press-fitted and fixed to the fixed flange body. The explosion-proof structure is characterized by joining the flange part of the explosion-proof brake cover to the flange part of the body and fixing it with bolts.

F. Action With the above-mentioned configuration, the action of making it possible to provide the explosion-proof hoist device easily and inexpensively using the fixed core of the standard hoist is achieved.

G. Embodiment An embodiment of the explosion-proof hoist device of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those of the conventional example shown in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is an enlarged cross-sectional view of a main part of FIG. 1, 3 is a speed reducer of a hoist device, and 6 is an electromagnetic brake thereof.

The fixed core 6a of the electromagnetic brake 6 is formed by additionally machining the outer circumference of the free end opening of the fixed core 6a of the standard hoist to form a press-fitted outer peripheral surface portion 9. And, in the press-fitted outer peripheral surface portion 9,
The annular fixing flange body 10 is press-fitted and fixed with the screw 11.

In the flange portion 10a of this fixed flange body 10, the bolt 12
A plurality of screw holes 13 for use are drilled.

Then, the flange portion 14a of the thick explosion-proof brake cover 14, which is a dedicated component for explosion-proof, is fitted to the flange portion 10a of the fixed flange body 10 to form an explosion-proof joint surface. Further, bolts 12 are screwed into corresponding screw holes 13 through a plurality of through holes 15 drilled in the flange portion 14a of the brake cover, and these flange portions 10a, 14a form an explosion-proof joint surface in close contact for a predetermined distance. .

Further, in this example, as shown in the drawing, the collar 16 is fitted to the motor pinion, and an explosion-proof joint surface is obtained at this portion.

The structure, operation, and effect of this embodiment other than those described above are the same as those of the conventional example shown in FIG.

H. Effect of the Invention As described in detail above, according to the explosion-proof hoist device of the present invention, the press-fitted outer peripheral surface is formed on the outer periphery of the free end opening of the standard type fixed core, and the fixed flange body is press-fitted and fixed thereto. In addition, since the explosion-proof structure was created by joining the flange of the explosion-proof brake cover to the flange of the fixed flange and fixing them with bolts, a fixed core molded with a brake coil of a standard hoist that is generally used was additionally processed. Since it does not require an explosion-proof fixed core as a dedicated part and does not require a dedicated casting or the like for its manufacture, it can reduce the manufacturing cost and provide an inexpensive product, and a special product. Since it is not necessary to mold the brake coil in the above work, there is an effect that the manufacturing period can be shortened.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of an essential part showing an embodiment of the explosion-proof hoist device of the present invention, and FIG. 2 is an overall vertical cross-sectional view showing an example of a conventional standard hoist device. 6a: Fixed core, 9: Press fit outer peripheral surface, 10: Fixed flange body, 14: Explosion-proof brake cover.

Claims (1)

[Scope of utility model registration request] 1. A press-fitting outer peripheral surface portion is formed on the outer periphery of a free end opening of a fixed core for an electromagnetic brake of a standard hoist device, and a fixing flange body is press-fitted to the press-fitting outer peripheral surface portion to form the fixed flange body. An explosion-proof hoist device, characterized in that the flange portion of the explosion-proof brake cover is joined to the flange portion and is fastened with bolts.