JP3459820B2 - Shaft bar with rollers for paper supply / discharge, transport etc. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller-equipped shaft rod used in office machines and the like for feeding and discharging, conveying, driving and the like.

[0002]

2. Description of the Related Art Conventionally, for example, a shaft rod with a paper feed roller of a printer has a shaft rod 101 outer peripheral surface 101a as shown in FIG.
In which a plurality of hard rubber rollers 102 are attached at predetermined positions, or as shown in FIG. 9, annular collar portions 103 are provided around both ends and a cylindrical elastic body 104 is fitted between them.
A plurality of synthetic resin rollers 102a are formed by projecting a small-diameter cylindrical portion 105 at one end side, and small pin holes 106, 1 are formed in each small-diameter cylindrical portion 105 and a predetermined position of the shaft 101, respectively.
No. 07 is penetrated, and a thin split pin 108 is driven in a state of communicating with these pin holes 106 and 107, and each roller 10
It is known that 2a is attached and fixed.

[0003]

However, in the former one shown in FIG. 8, since the plurality of rollers 102 are integrally molded with a molding die at predetermined intervals, the molding die is The momentum becomes large, the manufacturing cost of the molding die is large, and the product cost becomes high. Further, if any of the rollers 102 is incompletely molded, the roller 102 becomes useless. There is a problem in that the sheet may be rotated and run idle or may be displaced from a predetermined mounting position along the shaft 101, thereby impairing the sheet feeding function.

On the other hand, in the latter shown in FIG. 9,
Small pin holes 106 and 107 are provided at the small diameter cylindrical portion 105 and a predetermined position of the shaft rod 101, respectively, and a thin split pin 108 is driven in a state of being communicated with these pin holes 106 and 107, and an E ring is used. Since each roller 102a is attached, not only is the molding troublesome, but it also takes time and the work efficiency is poor. Moreover, if the split pin 108 is thinly broken, the roller 102a will rotate unnecessarily with the shaft rod 101 and rotate idle. However, even in this case, there is a problem that the paper feeding function may be hindered.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is easy to manufacture, the product cost can be reduced, and it can withstand a high torque sufficiently, and has an excellent operating condition. Paper feed and discharge that does not impair the transport function, etc.
It is an object to provide a shaft rod with a roller for transportation and the like.

[0006]

In order to achieve the above object, the shaft rod with rollers according to the present invention for feeding / discharging, conveying, etc., has an outer peripheral surface of a cylindrical shaft rod made of a metal material having a predetermined hardness.
And corresponding to the mounting position of the roller
Four small ridges are projected on each side, and each small ridge is the shaft rod.
Intersects and is parallel to the center line of
A cylindrical small-diameter roller portion, which is arranged at equal intervals along the outer peripheral direction and is made of a metal material having a hardness lower than that of the shaft rod, and a large-sized synthetic resin material, a rubber material, or an elastomer material, which is provided outside the small-diameter roller portion. It is possible to mount the roller by forming a double-structured roller from the diameter roller portion, fitting the small diameter roller portion to the shaft rod, and entangling and interlocking the small protrusion with the inner peripheral surface thereof. I did it.
A steel material is used as the shaft rod, a hardness lower than that of the shaft rod is used for the small-diameter roller portion, for example, aluminum, brass, or iron, and a large-diameter roller portion is a synthetic resin material having a lower hardness and lighter weight (for example, urethane). Foam resin),
As the rubber material, synthetic rubber, natural rubber or TPU (elastomer) is used. Furthermore, in the roller made of the synthetic resin material, raised hair may be electro-planted on the outer peripheral surface.

As described above, the roller has a double structure of a metal material and a synthetic resin material, a rubber material, or an elastomer material, and the small protrusion made of a metal material has a small diameter which is also a metal material having a hardness lower than that of the shaft rod. Since the roller is bitten and entangled with the inner peripheral surface of the roller part, the roller is firmly fixed, and even if a large rotating torque is applied, the groove is cut into an annular shape by the small protrusion and the roller idles with respect to the shaft rod. Will disappear. Moreover, since the large-diameter roller portion is formed of a synthetic resin material, a rubber material, or an elastomer material, the cost can be reduced as compared with a metal material.

In this case, it is preferable that the large-diameter roller portion is provided with a plurality of through-holes parallel to the central axis thereof. As a result, the large-diameter roller portion is much lighter than a metal material or the like, and not only the rotational torque is reduced by that amount, but also the rotation is smooth, so that the large-diameter roller portion is in an excellent operating state, and it is easy to handle and the material cost can be reduced.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a shaft rod with a roller for feeding / discharging, conveying, etc. according to the present invention will be described below with reference to the drawings. In the present invention, a roller shaft for paper feeding / discharging will be described. However, a shaft shaft with rollers for paper feeding / discharging, transportation, etc. can be used in office machines such as copiers, printers, and photographic machines. Used in addition to the shaft rod with the paper feeding / discharging roller and the shaft rod with the conveying roller, for example, a shaft rod with a driving roller for driving a belt, a shaft rod with a tension roller for applying tension to the belt, and a pressure for drying the paper. There are a shaft bar with a roller, a shaft bar with a transfer roller, a shaft bar with a cleaning roller for cleaning the roller, a shaft bar with a discharge roller, a developing roller, and a platen roller, and the present invention can be applied to any of these. . FIG. 1 is a perspective view of a shaft rod with a roller for feeding and discharging (hereinafter, simply referred to as a shaft rod with a roller), and FIG. 2 is an exploded perspective view thereof. In the figure, reference numeral 1 is a shaft rod formed of a cylindrical steel material, and the shaft rod 1 holds a predetermined surface hardness. A plurality of small protrusions 2 are projected on the outer peripheral surface 1a of the shaft rod 1 so as to correspond to the mounting positions of the rollers 4 described later. Specifically, a pair of small ridges 2 are provided at both ends of the roller 4, respectively. This is to prevent backlash from occurring when the roller 4 is fitted to the shaft rod 1 and the balance on both ends is lost. Each small ridge 2
As shown in FIGS. 3 and 4, with respect to the central axis C1 of the shaft rod 1,
That is, it forms an obtuse angle α with respect to the direction in which the roller 4 is fitted (usually 140 ° to 160 ° is preferable), and it is made to project in parallel at equal intervals at four locations on the outer peripheral surface. In detail, these small ridges 2 are formed by driving a chisel into a groove 3 of a required length, and when the groove 3 is formed, the small ridge 2 is raised and protrudes to one side of the groove 3. The cross section is almost triangular.

Reference numeral 4 denotes a roller that is attached to the outer peripheral surface 1 a of the shaft rod 1 by press-fitting and fitting to the position where the plurality of small projections 2 are projected. The roller 4 comprises a cylindrical small-diameter roller portion 4a made of a metal material having a hardness lower than that of the shaft rod 1, for example, aluminum, and a large-diameter roller portion 4b provided outside the small-diameter roller portion 4a and made of a synthetic resin material. Molded into a double structure. Examples of the synthetic resin include PP (polypropylene) resin, POM (polyphenylene sulfide) resin, and PPS (polyoxyethylene) resin. When used as a roller such as a transport roller or a drive roller, the roller, that is, the large-diameter roller portion 4b,
Apply a ceramic coating to the outer peripheral surface of.

The small-diameter roller portion 4a has a mounting hole 5 having an inner diameter that allows the shaft rod 1 to be fitted without rattling.
The small-diameter roller portion 4a is set in a molding die, and resin is flown around the small-diameter roller portion 4a to integrally form the large-diameter roller portion 4b, whereby the roller 4 is manufactured. In addition to the integral molding using the male and female dies, so-called extrusion molding may be performed in which the small diameter roller portion 4a is pulled out and the large diameter roller portion 4b is simultaneously extruded. Then, in order to obtain a product, the outer peripheral surface of the large-diameter roller portion 4b is ground to have a predetermined diameter.
As described above, the small protrusion 2 made of a metal material is the same as the shaft rod 1.
Since the small diameter roller portion 4a made of a metal material having a lower hardness bites and entangles with the inner peripheral surface of the small diameter roller portion 4a, the roller 4 is firmly fixed, and even if a large rotation torque is applied, the groove is cut into an annular shape by the small protrusion. The roller 4 does not run idle with respect to the shaft 1.

Further , the large-diameter roller portion 4b is provided with a plurality of recessed holes 6 parallel to the central axis C2 thereof in an annular shape. As a result, the large-diameter roller portion 4b becomes much lighter than a metal material or the like, and not only the rotation torque is reduced by that amount, but also the rotation is smooth and the operating state is excellent, and it is easy to handle and the material cost can be low. . Further, the fact that the weight of the roller 4 is reduced means that the roller 4
It will also be useful in preventing idle rotation. The cross-sectional shape of the meat stealing hole 6 is not limited to the fan shape, but may be a circular shape,
Other shapes such as an elliptical shape may be used.

The shaft rod A with rollers according to the present embodiment has the above-mentioned structure, and as shown in FIG.
Are fitted from the direction in which the respective small ridges 2 form the obtuse angle α and are attached to the respective mounting positions. At this time, the rollers 4 are fitted so as to rotate along the small protrusions 2 as shown in the direction of the arrow in FIG. As a result, as shown in FIG.
The small ridges 2 bite into the inner peripheral surface 5a of the mounting hole 5 of a and are entangled and entangled, and the four small ridges 2 on both sides are firmly fixed without rattling. Further, in this state, the rollers 4 do not rotate unnecessarily in the outer peripheral direction of the shaft 1 by the small protrusions 2, and since the small protrusions 2 are inclined with respect to the center line, It does not shift in the direction parallel to the line. This eliminates the risk of impairing the paper feeding / discharging and driving functions.

[0014] In addition, in this embodiment, the shaft rod 1
If there are two or more mounting positions of the rollers 4 in the above, each roller 4 is attached to a predetermined position while biting and passing through the small protrusions 2 at the previous positions except the last mounting position. At this time, the groove formed once on the inner peripheral surface 5a of the mounting hole 5 by each small ridge 2 does not pass the small ridge 2 twice. Four small ridges 2 on both sides of the roller 4 are provided at equal intervals on the outer peripheral surface 1a of the shaft 1, but this is because the fixed state is stable, and if there is no problem, three or five or six places. For example, the obtuse angle α may be appropriately selected as long as the obtuse angle α is within a range where fitting is easy.

[0015] Figure 6 shows an axial rod 11 according to another embodiment, on both sides of the mounting position of an outer circumferential surface 11a the roller 4 of the shaft rod 11, multiple small along the outer circumferential direction The protrusion 2a is projected. At each mounting position, the small projections 2a are provided at different positions alternately along the outer peripheral direction of the shaft rod 11, and the molding method is the same as that of the present embodiment. Then, while the roller 4 is fitted to the shaft rod 11 and also rotated, the small protrusions 2a are attached to the small diameter roller portion 4a.
Each roller 4 is attached by biting into the inner peripheral surface 5a of the mounting hole 5 to be entangled.

[0016] Thus also becomes that each small projections 2a bite into the inner circumferential surface 5a of the mounting hole 5 of the rollers 4, the addition is firmly fixed without Kukoto with gas motor These small protrusions 2a. Further, in this state, the rollers 4 do not rotate unnecessarily in the outer peripheral direction of the shaft 11 due to the small projections 2a, and the rollers 4 are rotated to be entangled with the small projections 2a. There is also no deviation in the direction parallel to the central axis of the sheet, so that there is no fear of impairing the sheet feeding / discharging and driving functions.

FIG . 7 shows a shaft A1 with a pressure roller according to another embodiment. The shaft A1 with a pressure roller is provided with a roller 4A having the same structure as the roller 4. The length thereof in the direction of the central axis C2 is longer than that of the roller 4 and has substantially the same length as the shaft rods 1 and 11. like this
Also as the roller 4A, the outer peripheral surfaces 1a, 11a of the shaft rods 1, 11
The present invention can be applied such that a plurality of small projections 2 or small projections 2a are projected in correspondence with the mounting positions of the rollers 4 and 4A. The same parts as those in the present embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

[0018]

As described above, the shaft rod with a roller according to the present invention for feeding / discharging, conveying, etc. is the outer peripheral surface of a cylindrical shaft rod made of a metal material having a predetermined hardness , take
Four small ridges on each end corresponding to the attachment position
And each small ridge is slanted with respect to the center line of the shaft rod.
Crosses and is parallel and is evenly spaced along the outer circumference
And is made of a metal material having a hardness lower than that of the shaft rod.
A cylindrical small-diameter roller portion and a small-diameter roller portion are provided outside the small-diameter roller portion.
From synthetic resin material, rubber material or elastomer material
Form a double-structured roller from the large-diameter roller section
Fit the small diameter roller part to the shaft rod and
Serial plurality of small on the inner peripheral surface of the Resona rotated along the small protrusion
Since the roller is attached by biting the ridges and entangled with each other, the manufacture of the shaft rod with the roller becomes extremely simple, and not only the work efficiency is improved but also the manufacturing cost can be reduced.

Further , since the roller has a double structure of a small diameter roller portion made of a metal material having a hardness lower than that of the shaft rod and a large diameter roller portion made of a synthetic resin material or a rubber material, each small protrusion
Article is not only are entangled securely bite into the metal material is a small diameter roller portion, without such also displaced in the direction of the flat row and the center axis or unnecessarily rotated in the outer circumferential direction of the shaft rod, further, large Small collision even if rotational torque is applied
Is also prevented that such grooves by conditions the roller off the annular ends up idle against shaft rod. As a result, there is an effect that various functions suitable for applications such as paper feeding / discharging, conveying, and driving functions are not impaired.

[0020] Moreover, the large-diameter roller portion becomes lighter than a metal material, an effect that correspondingly rotate rotating not only torque is reduced is superior in operation like becomes smooth, also it is made so inexpensively be easy to handle material costs There is.

[Brief description of drawings]

FIG. 1 is a perspective view of a shaft rod with rollers according to the present invention for feeding and discharging, carrying and the like.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a plan view of a shaft rod showing a state in which rollers are fitted.

FIG. 4 is a cross-sectional view of a main part of FIG.

FIG. 5 is a cross-sectional view of a shaft rod showing a state in which rollers are fitted.

FIG. 6 is a perspective view of a shaft rod according to another embodiment.

FIG. 7 is a perspective view of a shaft rod according to another embodiment.

FIG. 8 is a perspective view of a conventional shaft rod with a roller for paper feeding and discharging.

FIG. 9 is a perspective view of a conventional shaft rod with rollers for paper feeding and discharging.

[Explanation of symbols]

1,11 axis rod 1a, 11a outer peripheral surface2 small ridges 2a Small protrusion 4,4A roller 4a Small diameter roller section 4b Large diameter roller section 5 mounting holes 5a Inner surface 6 meat stealing hole A, A1 shaft rod with roller

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Claims (2)

(57) [Claims] 1. A cylindrical shaft made of a metal material having a predetermined hardness.
It is the outer peripheral surface of the rod and corresponds to the mounting position of the roller.
Four small ridges are projected on both ends of each, and each small ridge is
Intersects diagonally with the center line of the shaft and is parallel
And arranged at equal intervals along the outer peripheral direction,
Cylindrical small-diameter roller made of metal material with lower hardness than rod
Portion and a synthetic resin material provided outside the small diameter roller portion or
Large diameter roller part made of rubber material or elastomer material
A double-structured roller from the
Align the rollers along the small protrusions while fitting on the shaft rod.
Rotate the inner peripheral surface to bite the plurality of small protrusions
The roller can be attached by being entangled.
A shaft rod with a roller for feeding / discharging, conveying, etc. 2. The large-diameter roller portion has a central axis line
2. A plurality of parallel meat theft through holes are provided so as to penetrate therethrough.
A shaft rod with rollers for paper feeding and discharging, transportation, etc.