JPH0241374Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a metal bearing having grooves for supplying lubricating oil on the inner wall surface.

(Prior art) Metal bearings are generally used as bearings for rotating shafts such as various rollers, but in order to reduce friction with the rotating shaft, metal bearings of the type that supply lubricating oil to the inner wall surface of the metal bearing have been developed. A device as shown in FIG. 3, which is a perspective view with the upper half cut away, is known.

That is, this metal bearing 1' has a plurality of (two in the figure) lubricating oil supply grooves 4, which communicate with lubricating oil supply ports (not shown) provided on the peripheral wall 3, on the inner wall surface 2, and both ends thereof are formed on the inner wall surface. an oil seal fitting part 5 on one edge of the inner wall surface 2 and a stopper 8 of the oil seal 7 fitted in the oil seal fitting part 5;
(See FIG. 4) is constructed by providing a groove 6 around it for fitting.

However, as shown in FIG.
0 to the gear 12 in the gear box 11, when the bearing of the rotating shaft 10 is fixedly mounted in the hole 11b penetrated through the side wall 11a of the gear box 11, the lubricating oil supplied to the lubricating oil supply groove 4 Or the lubricating oil 1 dripped into the gearbox 11
3 accumulates inside the oil seal 7 through the gap between the metal bearing 1' and the rotating shaft 10, and the accumulated lubricating oil leaks to the outside from the gap between the oil seal 7 and the rotating shaft 10 which has worn out over time. Note that 13a indicates lubricating oil leaked to the outside.

When such a conventional metal bearing 1' is used, leakage of lubricating oil occurs, for example, at the printing section 14 of the wrapping paper in a high-speed cigarette winding machine as shown in FIG.
When used as a bearing for various rollers or shafts disposed in a vehicle, the following problems occur.

That is, in FIG. 5, the printing section 14 is provided with an ink application roller 17, a transfer roller shaft 18, a slide shaft 19, a printing roller 20, etc. on the side wall 16 of the gear box 15. The rotating shaft of the shaft is connected to a gear in a gear box 15 by being fitted into a metal bearing (not shown). Therefore, when lubricating oil leaks from the metal bearings of these rotating shafts as described above, the leaked lubricating oil may adhere to the wrapping paper 21 passing through the printing section 14 and contaminate it, or the printing section may be contaminated. The wrapping paper 21 installed below the container 14 may fall into the reservoir box 22 and contaminate the wrapping paper 21 in the reservoir box.

In addition, in FIG. 5, the wrapping paper 21 is the wrapping paper bobbin 2.
3 and stored in an appropriate amount in the reservoir box 22, passes through the suction guide plate 24, various guide rollers 25, 26, etc., and is subjected to predetermined printing by the printing roller 20 of the printing section 14. The tobacco is fed to the cigarette tube section via guide rollers 27, 28, etc. In this case, if the wrapping paper 21 becomes contaminated with lubricating oil in the printing section 14 or reservoir box 22, defective cigarettes will be produced, so it is required to prevent lubricating oil from leaking from the metal bearing.

(Problems to be Solved by the Invention) From this point of view, the present invention has been devised for the purpose of providing a metal bearing that prevents leakage of lubricating oil.

(Means for Solving the Problems) The present invention will be described below with reference to the accompanying drawings showing embodiments.

FIG. 1 shows a cutaway perspective view of the upper half of the metal bearing of the present invention. In the description of the present invention, the same reference numerals are used for the same parts as those of the conventional metal bearing 1'.

In Fig. 1, the metal bearing 1 of the present invention is shown.
In this metal bearing, a lubricating oil supply groove 4 is bored in the inner wall surface 2 and an oil seal fitting portion 5 is provided on one edge of the inner wall surface 2. A groove 29 having a downward slope from the facing inner wall edge 2a or its vicinity to the other inner wall edge 2b is bored in the inner wall surface 2 without intersecting the lubricating oil supply groove 4. be done.

This configuration is similar to the conventional metal bearing 1' except that a groove 29 having a slope is provided at the bottom of the inner wall surface of the metal bearing 1.
The inner wall surface edge 2 of the metal bearing 1 communicates with a lubricating oil supply port (not shown) provided in the peripheral wall 3.
A plurality (two in the figure) of lubricating oil supply grooves 4 that do not communicate with the grooves a and 2b are bored in the inner wall surface 2. or,
The oil seal 7 is adjacent to the oil seal fitting portion 5.
A groove 6 for fitting a stopper 8 is provided around the periphery.

(Function) As shown in FIG. 2, the metal bearing 1 of the present invention is fitted into the hole 11b provided in the side wall 11a of the gear box 11 housing the gear 12 so that the groove 29 is located at the bottom of the inner wall surface 2. , a rotating shaft 10 connecting various rollers (or shafts) 9 and gears 12 is inserted into the metal bearing 1, and an oil seal 7 is inserted into the oil seal fitting portion 5 of the metal bearing 1.
When fitting the stopper 8 of the oil seal 7 into the groove 6, the lubricating oil supplied to the lubricating oil supply groove 4 or the lubricating oil that has entered the gap between the metal bearing 1 and the rotating shaft 10 from the gear box 11 is When the gap is filled, excess lubricating oil is returned into the gearbox 11 through the sloped groove 29.
13b shows lubricating oil droplets that have been returned to the gearbox 11. Therefore, the conventional metal bearing 1'
When lubricating oil is used, the oil seal 7
After being stored inside the gearbox 11, leakage to the outside of the gearbox 11 is completely prevented.

(Effect of the invention) As explained above, according to the metal bearing of the invention, leakage of lubricating oil from the oil seal part of the metal bearing can be completely prevented by simply drilling a groove with a slope at the bottom of the inner wall surface. This has the advantage of preventing secondary damage such as contamination of articles transferred by the roller due to lubricant leakage. It is particularly effective when used in the printing section of a cigarette winding machine, where even a small amount of oil stains on the wrapping paper can have a significant negative impact on the taste.

[Brief explanation of drawings]

Fig. 1 is a cutaway perspective view of the upper half of the metal bearing of the present invention, Fig. 2 is an explanatory diagram of the function of the metal bearing of the present invention, and Fig. 3 is a cutaway perspective view of the upper half of the conventional metal bearing. , FIG. 4 is an explanatory diagram of the operation of a conventional metal bearing, and FIG. 5 is a schematic explanatory diagram of a wrapping paper printing section in a high-speed tobacco cigarette cigarette machine. 1, 1'...Metal bearing, 2...Inner wall surface,
4... Lubricating oil supply groove, 5... Oil seal fitting portion, 29... Groove.

Claims (1)

[Scope of utility model registration request] In a metal bearing in which a lubricating oil supply groove is bored in an inner wall surface and an oil seal fitting part is provided on one edge of the inner wall surface, the inner wall surface edge facing the oil seal fitting part or 1. A metal bearing, characterized in that a groove having a downward slope from the vicinity thereof toward an edge of the other inner wall surface is bored in the inner wall surface without intersecting the lubricating oil supply groove.