JPH0988985A - Shaft structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a shaft structure that is not attributed to a device failure by installing an integrally formed projection on the circumference of a shaft, and constituting this projection so as to make its side face adhere close to the side of a bearing. SOLUTION: Each projection 15a is installed in a shaft 15 attached tight to a roller 2 at two spots on the circumference, and each of these projections 15a is pressed by an exclusive crushing jig, forming the shaft 15 into elastic deformation. This shaft 15 is made rotatable by what two bearings 6 and 7 supporting both the ends are supported by two frames 8 and 9. The projection 15a is installed at a side face of the bearing 6 so as to contact it, and the shaft 15 is regulated of its position by the projection 15a in an arrow A direction but by a pulley 10 in an arrow B direction, to the bearing 6. Since a projection side face is formed so as to adhere close to one side of the bearing, as an E type snap ring, such causes as attributable to a device failure that it is scattered, dropped in the device and touched to those of drive and electric systems, are all eliminated there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft structure of a carrier system used for a medium carrier path of financial instruments, printing machines and the like.

[0002]

2. Description of the Related Art Conventionally, various methods have been developed for a medium carrying system used in a medium carrying path of financial equipment and printing equipment. FIG. 6 is an explanatory view showing a medium conveying roller which is an example of a conventional shaft structure. The medium 1 is nipped by a pressure roller 3 provided so as to face the roller 2, and the roller 2 is driven by a drive source (not shown). Rotation guide 4 by rotating
The vehicle travels along a gap regulated by a and 4b.

The roller 2 is fixed to a shaft 5, and is rotatably supported by bearings 6 and 7 which support both ends thereof by frames 8 and 9. Further, a pulley 10 is fitted into one end of the shaft 5, and the side surface of the pulley 10 has a bearing 6
Is closely attached to the side surface of the shaft and is attached to the shaft 5 by the mounting screw 11. A belt 12 engaged with the pulley 10 is connected to a drive source (not shown).

Supports 8 for bearings 6 and 7 are provided on the frames 8 and 9.
a and 9a are provided, and the applicant of the present invention is
It is supported by the bearing support structure applied for in No. 9210. Numeral 13 is an E-shaped retaining ring fitted in a groove provided in the shaft 5.

With respect to the bearing 6 fixed to the frame 8, the shaft 5 is provided with an E-shaped retaining ring 13 in the direction of the arrow A, and also with the arrow B.
The position is regulated by the pulley 10 in the direction. Similarly, the shaft 5 has an arrow A with respect to the bearing 7 fixed to the frame 9.
The direction is restricted by a set screw 14.

Then, the mounting screw 11 and the E-type retaining ring 1 are based on the above-mentioned dimensions of each component and the distance (L) between the frames 8 and 9.
Position 3 is set.

[0007]

However, in the above shaft structure, the roller 2 needs to be replaced when the roller 2 is worn due to long-term operation or is accidentally damaged due to removal of the jam of the conveying medium. become. As the replacement work, first, in addition to removing the mounting screw 11 of the pulley 10 and the shaft 5, it is necessary to remove the E-shaped retaining ring 13.

The E-shaped retaining ring 13 is generally made of metal,
Due to the elastic force of its nature, it is easily scattered and lost when it is removed, and when a new E-type retaining ring 13 is attached, it may be deformed unless a special tool is used, and it may fall during operation. It is possible.

If the E-shaped retaining ring 13 thus scattered or dropped touches the inside of the apparatus, especially the drive system or the electric system, it may cause the failure of the apparatus. The present invention has been made in view of the above problems, and an object thereof is to provide a shaft structure that does not cause a device failure.

[0010]

In order to solve the above-mentioned problems, the present invention has a bearing held by a frame and a shaft fitted to the bearing, and the relationship between the bearing and the shaft is restricted to a predetermined position. In the shaft structure, the protrusions are integrally formed on the outer circumference of the shaft,
It is configured such that the side surface of the protrusion is in close contact with the side surface of the bearing. According to the above-mentioned structure, the projecting portion integrally formed with the shaft can perform the same function as that of the E-type retaining ring, and the above-mentioned problem due to the removal can be eliminated.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a shaft structure of the present invention, which is an example of a medium carrying roller shaft. FIG. 2 is a perspective view showing an outline of the shaft structure of the present invention, and FIG. 3 is a sectional view taken along the line CC in FIG. Elements common to the drawings are denoted by the same reference numerals.

In the figure, a shaft 15 to which the roller 2 is fixed is shown.
Is provided with two protrusions 15a at two peripheral portions. The protrusion 15a is formed by pressing the shaft 15 in the direction of arrow D by a dedicated crushing jig described later to plastically deform the shaft 15.

The medium 1 is nipped by a pressure roller 3 provided so as to face the roller 2, and the rollers 2 are rotated by a drive source (not shown) so that the running guides 4a, 4b are formed.
It runs along the gap regulated by.

The roller 2 is fixed to a shaft 15, and is rotatably supported by bearings 6 and 7 which support both ends thereof by frames 8 and 9. Further, the pulley 10 is fitted into one end of the shaft 15, and the side surface of the pulley 10 is in close contact with the side surface of the bearing 6 and is attached to the shaft 15 by a mounting screw 11. Belt 1 hung on this pulley 10
2 and a drive source (not shown) are connected.

The above-mentioned projection 15a is provided on the side surface of the bearing 6 so as to come into contact therewith, and the shaft 15 with respect to the bearing 6 fixed to the frame 8 has a projection 15 in the direction of arrow A.
The position of the pulley 10 is regulated in the arrow B direction by a.

Next, an example of using a ball bearing as the bearing 7 will be described. 7a is an inner case into which the shaft 15 is fitted. An outer case 7b is fitted to and supported by the frame 9, and these inner cases 7a
A plurality of balls 7c are fitted between the outer case 7b and the outer case 7b to form a ball bearing.

The protrusion 15a of the present application is 1 to 1 in the axial direction.
The protrusion is about 1.5 mm, the width of the protrusion is about 2 mm, and the side surface 15 b of the protrusion 15 a is the inner case 7.
It can be tightened by the set screw 14 so as to be pressed against a. Needless to say, as the tightening margin, the length of the fitting portion of the bearing 7 is shorter than the width of the bearing 7.

FIG. 4 is an explanatory view showing the concept of the crushing jig. Reference numeral 16a is a pedestal, which supports the crushed shaft 15, and 16b is a shaft 1 supported by the pedestal 16a.
It is a clamper for fixing one end of 5. 17a is also a pedestal, which supports the other end of the shaft 15 and is fixed by a clamper 17b.

The pedestals 16a and 17a are provided with a predetermined gap 18, and the press pieces 19a and 19b act on the gap 18 from the direction of the arrow D by a pressurizer (not shown), so that the shaft 15 is made plastic. Deform.

Although not shown in the crushing jig, the axial end surface 15b of the projection 15a has, for example, a flat shape and is devised so that the outer shape is not deformed.

Further, like the application example of the shaft structure shown in FIG. 5, the crushed portion of the shaft 15 'is thinly pre-processed (E = 0.1 to 0.1).
It is also possible to prevent the bearings 6 and 7 from being unable to be fitted even if a slight amount of bulge is generated on the shaft 15 'by performing crushing after 0.3 mm).

The crushing jig described above is an example in which the pedestal 16a and the clamper 16b are divided. However, the crushing jig may be integrally formed, and the shaft 15 may be pulled out by sliding in the axial direction after pressurization. .

With the above construction, the number of steps for attaching the E-shaped retaining ring can be reduced, and since the groove for the E-shaped retaining ring is unnecessary, the strength of the shaft is not lowered. Further, the protrusion can be applied to the substitute of the key in the coupling means of the mechanical parts by the key.

[0024]

As described above, according to the present invention, in the shaft structure having the bearing held by the frame and the shaft fitted to the bearing, and the positional relationship between the bearing and the shaft is regulated, Part of the bearing is provided with a protrusion that is integrally deformed to the outside of the surroundings, and one side face of the bearing is formed so that the side face of the protrusion is in close contact with the bearing. It will not fall down and will come into contact with the drive system or electrical system, and will not cause a failure.

Further, since the protrusion can withstand pressure from the side surface as compared with the E-type retaining ring, when a ball bearing is adopted as the bearing, the inner case in contact with the shaft can be tightened. It is possible to prevent sliding (slip) between the inner case and the inner case.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a shaft structure of the present invention.

FIG. 2 is a perspective view showing a protrusion in the shaft structure example of the present invention.

FIG. 3 is a cross-sectional view taken along the line CC of FIG.

FIG. 4 is an explanatory view showing the concept of a crushing jig.

FIG. 5 is a perspective view showing an application example of the shaft structure of the present invention.

FIG. 6 is an explanatory view showing an example of a conventional shaft structure.

[Explanation of symbols]

 2 roller 3 pressure roller 5,15 shaft 6,7 bearing 8,9 frame 10 pulley 12 belt 13 E-type retaining ring

Claims (2)

[Claims] 1. A shaft structure having a bearing held by a frame and a shaft fitted to the bearing, wherein the relationship between the bearing and the shaft is regulated at a predetermined position, and the shaft is integrally formed on the outer periphery of the shaft. A shaft structure, characterized in that a protruding portion is provided, and a side surface of the protruding portion is in close contact with a side surface of the bearing. 2. The shaft structure according to claim 1, wherein the protrusions are provided at least at two positions on both sides of the center of the shaft by a crushing process.