JP3442201B2 - Shaft support structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft support structure of a roller used for carrying a medium such as financial equipment and printing equipment.

[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. 3 is an explanatory view showing a medium carrying system, in which a medium 1 is a belt 3a provided to face a carrying path 2.
The medium 1 is conveyed in the direction of arrow C by being rotated between the drive shaft 4a in the direction of arrow A and the drive shaft 5a in the direction of arrow B by a drive source (not shown). Reference numerals 4b and 5b are driven shafts that rotate via the belts 3a and 3b by the rotation of the drive shafts 4a and 5a.

In the transport path 2 in which the medium 1 is sandwiched and transported by the belts 3a and 3b, the medium 1 and the belt 3 are conveyed.
The idle rollers 6a and 6b are added so that slippage does not occur between a and 3b so that the contact force with respect to the medium 1 becomes equal to or greater than a predetermined value.

FIG. 4 is a perspective view showing a shaft supporting structure of an idle roller 6a according to a conventional example. The idle roller 6a is rotatably supported by a roller shaft 7, and
The roller shaft 7 is supported by a bracket 8. Grooves (not shown) are formed at both ends of the roller shaft 7 at positions projecting from the surface of the bracket 8, and E-shaped retaining rings 9 are fitted in the grooves.

The bracket 8 is fixed to a predetermined position of a frame (not shown) so that the surface of the idle roller 6a contacts the belt 3a.

[0007]

However, in the above shaft support structure, the E-shaped retaining ring 9 needs to be removed when the idle roller 6a is replaced when it is worn. Further, in a device having a complicated medium carrying system such as a financial device, a large number of idle rollers 6a are provided.
The number of assembling steps by using the die retaining ring 9 cannot be ignored.

Further, the E-type retaining ring 9 is generally made of metal, and is easily scattered and lost when it is removed due to its elastic property, and a special tool is required when a new E-type retaining ring 9 is attached. If not used, it may be deformed. In particular, when it is lost, it must be handled with care in consideration of the possibility that it may fall into the device and come into contact with the drive system and electrical system, causing a failure.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a shaft support structure that can be easily assembled without causing a device failure.

[0010]

In order to solve the above-mentioned problems, the present invention provides a shaft support structure in which a shaft is fitted in bearing holes of two opposing frame bodies, and a part of both ends of the shaft is axially arranged. A semi-circular portion having parallel plane portions is formed, and the bearing hole is formed in a groove shape having the same size as the thickness of the semi-circular portion and being cut from the end portion of the frame body. The semicircular portion can be held, and in the held state, a protrusion that engages with the entire circular portion of the shaft is formed on the facing surface of the frame body.

When the shaft is incorporated into the frame, the semicircular portion is inserted along the groove, and when the whole circular portion is engaged, the frame is bent outward to be incorporated.

[0012]

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 exploded perspective view showing an outline of a shaft support structure of the present invention. The elements common to the drawings are given the same reference numerals.

In the figure, 6a is the above-mentioned idle roller, which is rotatably supported by a shaft 10.
A semicircular portion 10a and a full circular portion 10b are provided at both ends of 0.

The semi-circular portion 10a is processed into a substantially D-shaped cross section for a predetermined length from the tip to the side surface of the idle roller 6a, and the other end is similarly D-shaped. ing. Reference numeral 11 denotes a frame, which is a support portion 1 of the shaft 10.
1a and 11b are integrally formed. The support portion 11a and the support portion 11b are symmetrically opposed to each other, and the groove portion 11 is formed at the substantially center.
c is provided and is formed so as to substantially match the thickness of the semicircular portion 10a of the shaft 10.

Reference numeral 11d designates a thick portion, which is a protrusion provided on the center side further from the inner side surface of the support portion 11a, and has a part of the stepped portion having an arcuate portion 11e having the same diameter as the shaft 10. ing.

When mounted on the frame 11, the semicircular portion 10 is formed along the groove 11c from the direction of arrow D as shown in FIG.
As a is inserted, the entire circular portion 10b and the thick portion 11d interfere with each other. However, since the thick portion 11d has an inclined surface as shown in the figure, the supporting portions 11a and 11b are placed outside (support portion). 1
At 1a, it is bent in the direction of arrow F).

The whole circular portion 10b is further inserted to increase the thickness of the thick portion 11.
When the circular-shaped portion 11e of d is pushed in, the circular portion 10b is pressed by the circular-shaped portion 11e.

At this time, as shown in the sectional view of FIG. 2, the semicircular portion 10a is inserted to the bottom of the groove portion 11c, the shaft 10 is prevented from rotating by the semicircular portion 10a, and is disengaged by the arc-shaped portion 11e. Will be blocked.

When the idle roller 6a is removed, the support portions 11a and 11b are bent outward (in the direction of arrow F in the support portion 11a) and pulled out in the opposite direction of arrow D.

Although the semi-circular portion 10a is cut out to about half of the full-circular portion 10b, if the shaft 10 can be prevented from rotating and the shaft 10 can be prevented from coming off, its shape and the amount of protrusion are as follows. It is not limited to.

[0021]

As described above, according to the present invention, even when the idle roller is worn, it is not necessary to remove the E-shaped retaining ring and the like, and the E-shaped retaining ring can be easily replaced.

Also when mounting, there is no possibility of dropping into the device when it is inserted into the groove portion, and there is an effect that it can be easily assembled.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an outline of a shaft support structure of the present invention.

FIG. 2 is an explanatory view showing a shaft supporting state of the present invention.

FIG. 3 is an explanatory diagram showing a medium carrying system.

FIG. 4 is an explanatory view showing an example of a conventional shaft support structure.

[Explanation of symbols]

1 medium 2 transport paths 3a, 3b belt 4a, 5a drive shaft 6a Idol roller 9 E type retaining ring 10 axes 10a semicircular part 10b All circular part 11a, 11b support part 11c groove 11d thick part 11e Arc shape part

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Okazaki 1-7-12 Toranomon, Minato-ku, Tokyo Inside Oki Electric Industry Co., Ltd. (72) Yasuhisa Ogawa 1-12-12 Toranomon, Minato-ku, Tokyo Within Oki Electric Industry Co., Ltd. (56) References: 62-135264 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16B 21/04 F16B 21/16

Claims (2)

(57) [Claims] 1. A shaft support structure in which a shaft is fitted in bearing holes of two facing frame bodies, wherein a semicircular portion having a plane portion parallel to the axial direction is formed at a part of both ends of the shaft, The bearing hole has the same size as the thickness of the semicircular portion and is formed in a groove shape cut from the end of the frame body, and the end of the groove portion can hold the semicircular portion, and the holding state In the shaft support structure, a protrusion that engages with the entire circular portion of the shaft is formed on the facing surface of the frame. 2. The shaft support structure according to claim 1, wherein the frame body is bent and incorporated when the circular portion of the shaft is engaged with the frame body.