JPH06329295A - Paper feeding roller - Google Patents

Abstract

PURPOSE:To facilitate assembly works for combining a ball bearing with a shaft by an automatic machine by facilitating handling with a press-in structure employed for combining a pipe member with a shaft for weight saving and concurrently the shaft to be pressed in the pipe member shorter in length. CONSTITUTION:In an information equipment output printing device and a printing paper copying device, the paper feed roller is so constituted that a shaft equipped with each ball 5 which is rotatably housed in a track provided with a groove in a semi-spherical shape in cross section, a cover 1 rotatably holding the balls 5, and with a cover 2 fitted in the cover 1, is pressed in both the end sections of a pipe member 6 in a form of a rotating cylindrical body to the outer circumference of which a rubber member 7 is firmly attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cylindrical paper feed roller used in an information equipment output printing apparatus and a printing paper copying apparatus.

[0002]

2. Description of the Related Art As for the parts used in an information equipment output printing device and a printing paper copying device, the recent technological trend is to reduce the number of parts and improve the ease of assembly by compounding the parts. Conventionally, the paper feed roller, which is always used to feed the printing paper with the information equipment output printing device and the printing paper copying device, has a ball bearing on either end shaft part or one end shaft part for smooth rotation. As a result, it was attached as a paper feed roller to the frame part of the information equipment output printing device and the printing paper copying device.

A conventional technique will be described below with reference to FIGS. 4, 5 and 6. FIG. 4 and FIG. 5 are detailed sectional views of elements of the conventional example, and FIG. 6 is a sectional view of elements showing constituent elements. In FIG. 6, the first paper feed roller 100 is drivingly connected by a gear 116 that receives rotation from a motor (not shown).
And second paper feed roller 110 that functions as an idler
The printing paper (not shown) is fed by being sandwiched between. The first paper feed roller has a rubber portion A106 fixed to the outer peripheral portion of the shaft A101. The shaft A101 is inserted into the inner ring of the ball bearing 108 on the right side, and is supported by the frame right 103 by fitting the bush 105 on the outer periphery thereof. The E-shaped retaining ring 109 has a function of positioning and a function of preventing removal.
Similarly, the left side of the shaft A101 is also inserted into the inner ring of the ball bearing 108, supported on the frame left 111 by fitting the bush 105 on the outer periphery thereof, and positioned and prevented from falling by the E-shaped retaining ring 109. The second paper feed roller 110 that functions as an idler has a rubber portion B107 fixed to the outer peripheral portion of the shaft B102. The shaft B102 is inserted into the inner ring of the ball bearing 108 on the right side, and is supported by the frame right 103 by fitting the bush 105 on the outer periphery thereof. The E-shaped retaining ring 109 has a function of positioning and a function of preventing removal. Similarly, the left side of the shaft B102 is also inserted into the inner ring 112 of the ball bearing 108 and supported by the frame left 111 by fitting the bush 105 on the outer periphery thereof.
Positioning and removal prevention are performed by an E-shaped retaining ring 109. FIG. 5 is a detailed view of an element cross-section part and shows in detail the support of the first and second paper feed rollers to the frame. The support to the frame has the same structure at all four points of the conventional technology explanatory diagram, and the first paper feed roller 100 and the second paper feed roller 110 are used as parts of the information device output printing device and the printing paper copying device. When attaching to the right 103 and the frame left 111, the shaft A101 and the shaft B102 were inserted into the inner ring 112 of the ball bearing 108, and the bush 105 was fitted on the outer periphery of the ball bearing and supported by the frame. The ball bearing 113 is an outer ring, and 114 is a cage.

[0004]

In the above conventional technique, when the paper feed roller is attached as a component of the information device output printing device and the printing paper copying device, the assembly process of attaching the ball bearing and the bush is complicated. In addition to the assembly problem that the shaft, ball bearing, and bushing must be inserted when mounted, and the movement of the left and right positions when fitted together must be restricted, the assembly is not possible. There was

In an information device output printing apparatus and a printing paper copying apparatus, a groove of a hemispherical cross section is provided, a ball rotatably accommodated in the groove of the track and a cover 1 for rotatably holding the ball. And a shaft having a cover 2 fitted to the cover 1 is press-fitted into both ends of a rotating cylindrical pipe material having a rubber material fixed to the outer periphery thereof, thereby forming a composite of a paper feed roller shaft portion and a ball bearing component. It is possible to fix by using, to reduce the number of parts and at the same time to eliminate the complexity of the assembly process, and by fixing the parts by combining them, insert the ball bearing and bush into the shaft, and move the mounting position left and right when fitted. In addition to providing easy assembly and regulation, the long shaft is replaced with a pipe material to reduce the weight and facilitate the handling of the paper feed roller, and to reduce the pressure required for compounding. By shortening of an axis, and aims to facilitate the assembly of the composite ball bearing and the shaft by an automatic machine.

[0006]

The object of the present invention, which constitutes this object, is as follows. In an information equipment output printing apparatus and a printing paper copying apparatus, a groove of a hemispherical cross section is provided, a ball rotatably accommodated in the groove of the track, a cover 1 for rotatably holding the ball, and the cover. 1. A paper feed roller characterized in that a shaft having a cover 2 fitted to 1 is press-fitted into both ends of a rotating cylindrical pipe material having a rubber material fixed to the outer periphery thereof.

[0007]

The present invention will be described in detail with reference to the drawings. Figure 1
2 is an elemental partial cross-sectional view of both ends of the paper feed roller of the present invention, and FIG. 2 is an elemental partial cross-sectional view of the paper feed roller of the present invention attached to a frame portion of an information equipment output printing apparatus and a printing paper copying apparatus. 3 is an element sectional view showing constituent elements. Figure 3
Then, the first paper feed roller 10 which is drivingly connected to a motor (not shown) by the gear 14 fixed to the shaft A1.11.
Then, the printing paper (not shown) is fed by being sandwiched by the second paper feeding roller 21 which functions as an idler. The first paper feed roller 10 has a rubber material A 16 fixed to a pipe material 17, and a shaft 11 and a shaft 22 are press-fitted into both ends of the pipe material 17.

The structure of the present invention will be described in detail with reference to the partial sectional views of the elements shown in FIG. The shaft 1 is provided with a raceway groove 4 having a hemispherical cross section, and the ball 5 is rotatably held in the raceway groove 4 by the covers 1 and 2 and the covers 2 and 3 fitted to the covers 1 and 2, and as a result, the balls are formed. 5, the covers 1 and 2 and the covers 2 and 3 are rotatably fixed to the shaft 1, and the shaft 1 is press-fitted into the pipe member 6. The attachment of the paper feed roller of the present invention to the information equipment output printing apparatus and the printing paper copying apparatus will be described with reference to FIG. A cover 1 and a cover 2, which are rotatably held in a groove 4 of a hemispherical cross-section provided on the shaft 1, are supported by bushes 8 on the outer circumferences of the covers 2 and 3 to output an information device, a printing device and a printing paper copy. It is attached to the frame 23 of the apparatus and positioned and fixed by an E-shaped retaining ring 9. The shaft A11 of the first paper feed roller 10 in FIG. 3 has a bush 8 on the outer circumference of the covers 2 and 3.
And is supported by the frame right 13. The E-shaped retaining ring 9 has the function of positioning and preventing the removal. Similarly, on the left side of the shaft A22, a bush 8 is fitted around the outer circumference of the covers 2 and 3 and is supported by the frame left 15, and the E-shaped retaining ring 9
Is positioned and prevented from coming off. In the second paper feed roller 21 which functions as an idler, a rubber portion B18 is fixed to the outer peripheral portion of the pipe material 19, a shaft B12 is press-fitted, and a shaft B24 is press-fitted to the other end. The shaft B12 is supported by the frame right 13 with the bush 8 fitted on the outer periphery of the covers 2 and 3 on the right side. The E-shaped retaining ring 9 has the function of positioning and preventing the removal. Similarly, on the left side of the shaft B24, a bush 8 is fitted around the outer periphery of the covers 2 and 3 and is supported by the frame left 15, and the E-shaped retaining ring 9 positions and prevents the shaft from coming off. The number of balls 5 rotatably held in the groove 4 of the track is six or more, and there is no member corresponding to the conventional cage of the ball bearing, so that smooth rotation is maintained. Further, the support to the frame has the same structure at all four places in FIG.

[0009]

As can be seen from the above description, according to the present invention, the ball corresponding to the conventional ball bearing, the cover 1, and the cover 2 are rotatably fixed to the shaft, and the shaft is made of a rubber material on the outer periphery. By press-fitting to the rotating cylindrical pipe material that has been fixed, it is not necessary to position the member corresponding to the ball bearing when incorporating the paper feed roller in the information device output printing device and the printing paper copying device, and easy assembly is possible. In addition, by combining the inner ring of the ball bearing and the shaft, it is possible to reduce the number of parts, and the press-fitting structure of the pipe material and the shaft makes it easy to handle and press-fits into the pipe material. By shortening the length of the shaft to be used, it has an effect of facilitating automatic assembly of the combination of the ball bearing and the shaft by an automatic machine.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of elements showing the present invention.

FIG. 2 is a partial cross-sectional view of elements showing the present invention.

FIG. 3 is a sectional view of components of the present invention.

FIG. 4 is a partial cross-sectional view of an element in a conventional technique.

FIG. 5 is a partial cross-sectional view of an element according to the related art.

FIG. 6 is a sectional view of components according to the related art.

[Explanation of symbols]

 1 axis 2 cover 1 3 cover 2 4 orbital groove 5 ball 6 pipe material 7 rubber member

Claims (1)

[Claims] 1. An information equipment output printing apparatus and a printing paper copying apparatus, wherein a groove of a hemispherical section track is provided, a ball rotatably accommodated in the groove of the track, and the ball is rotatably held. A paper feed roller characterized in that a shaft having a cover (1) and a cover (2) fitted to the cover (1) is press-fitted into both ends of a rotating cylindrical pipe member having a rubber material fixed to the outer periphery.