JPS61254405A - Roller apparatus for conveying article - Google Patents

Abstract

PURPOSE:To form a conveying roller apparatus excellent in stability of operation by using a rigid roller not changing in coefficient of friction as a rotary support member movable supporting a work, and transmitting turning driving force through a bevel gear loosely fitted to a driving shaft. CONSTITUTION:Rigid rollers 12 are fixed at designated intervals on a plurality of rotary shafts 11 arranged in parallel to each other in the axial direction. A mechanism 10 for transmitting rotating driving force F for conveying a work has a power transmission path formed between a longitudinal bevel gear 13 fixed to the shaft 11 and a main bevel gear 14 engaged with the gear 13, and the gear 14 is loosely fitted to a driving shaft 16 by urging of a pressing spring 15. An adjust ring 19 of the shaft 16 is operated to adjust the urging conditions of the spring 15 to the gear 14, so that the pressing force is controlled to be conformable to the weight of a transported article. Thus, the magnitude of turning force transmitted to the rollers 12 can be freely adjusted.

Description

Detailed Description of the Invention The present invention relates to a roller device for conveying articles, and more specifically to a roller device for transmitting a constant propulsive force to an article to be conveyed, for example, a work fixed on a pallet. The present invention relates to a roller device for conveying articles, which is equipped with a power transmission mechanism in which a main bevel gear is loosely fitted onto a drive shaft while being biased by a pressure spring.

A friction roller conveyor is conventionally used as a transport device for one-way workpieces and the like. As illustrated in FIG. 3, a conventional friction roller conveyor is constructed by integrally fixing an oil-impregnated bearing (2) and a friction roller (3) around a rotating shaft (1) that is constantly driven to rotate. The roller body is constructed by loosely fitting the roller body to the rotating shaft (1) so as to be relatively rotatable.

(In the conventional friction roller conveyor having the above structure, the outer diameter of the roller (3) is (D), the rotation axis (
The outer diameter of 1) is (d), the coefficient of friction between the inner circumferential surface of the roller and the outer circumferential surface of the rotating shaft is (μ), and the weight of the article to be conveyed placed on the flix roller conveyor is (W), the rotational driving force to be applied to the friction roller,
In other words, the driving force (F
) can be expressed as in the following equation 0.

d F=W □μ □■ As can be understood from the formula 0, the rotational driving force (F) that should be applied to the lid siding roller remains constant as long as the friction coefficient (μ) does not change. If cutting oil or lubricating oil adhering to the object, for example, the work, flows between the rotating shaft (1) and the oil-impregnated bearing (2) for some reason, the coefficient of friction (μ) changes, causing the object to be conveyed to The weight of the item (
Even when W) does not change, the magnitude of the rotational driving force (F) changes. Therefore, when the weight (W) of the object to be transported is small, the rotational driving force (F) is insufficient, and conversely, when the weight (W) of the object to be transported is large, an unnecessarily large rotational driving force (F) is generated. do. In order to avoid such inconvenience, it is necessary to form a transmission mechanism for the rotational driving force (F) such that the coefficient of friction (μ) between the rotating shaft (1) and the oil-impregnated bearing (2) does not change. In the conventional device, a bearing device is provided inside the Brixilan roller, which forms a transmission mechanism for the rotational driving force (F) in which the coefficient of friction (μ) does not change. is not easy.

A main object of the present invention is to provide a roller device for conveying articles that is equipped with a novel sliding engagement mechanism that can solve the above-mentioned problems found in conventional lid thin roller conveyors.

In view of the above purpose of determining μ' A driven bevel gear (13) is fixed to the base end of the rotating shaft (11), and a main bevel gear (14) meshes with the driven bevel gear.
is attached to the drive shaft (1) under the bias of the pressure spring (15)
6) is loosely fitted to form a transmission mechanism (10) for transmitting rotational driving force (F) to the rigid roller (12).

The rotary support member that movably supports the object to be conveyed, for example, a work fixed on a pallet, is a rigid roller that does not require WR soaking and does not have a risk of changing the coefficient of friction due to adhesion of cutting oil, lubricating oil, etc. (12), and since the rotational driving force transmission mechanism (10) having a sliding engagement function is arranged at a predetermined distance from the rigid roller (12), cutting oil etc. It is possible to provide a roller device for transporting articles that has excellent operational stability without fear of changes in friction coefficient due to adhesion.

FIG. 1 is a plan view illustrating the overall structure of the apparatus of the present invention, and FIG. 2 is a partial vertical cross-sectional view showing an enlarged view of the main structure. In these drawings, a roller device for transporting an article to be transported, for example, a workpiece fixed on a pallet (not shown), is a roller device with a plurality of rotating rollers arranged with their axes kept parallel to each other. It consists of a shaft (11) and a thin roller (12) fixed on the rotating shaft at a predetermined interval. The transmission mechanism (10) of the rotational driving force (F) for conveying the workpiece to the rigid roller (12) includes a driven bevel gear (13) fixed to the base end of the rotation shaft (11).
A power transmission path is formed between the driven bevel gear and the main bevel gear (14) that mesh with the driven bevel gear, and the main bevel gear (14)
The drive shaft (1) is biased by a pressure spring (15).
6) is loosely fitted. To explain in more detail, the main bevel gear (14) has its back surface abutted against an annular support plate (17) fixed to the drive shaft (16), and is supported by the pressure spring (15). It is supported rotatably around the drive shaft (16) by having its front portion abut against a lubricating slide ring (18) along the axial direction of the pressed drive shaft (16). On the other hand, the drive shaft (16) has the pressure spring (1
Pushing force (P) to be transmitted from 5) to the main bevel gear (14)
An adjustment ring (19) for adjusting the size is attached so that the position can be freely adjusted. Therefore, by operating the adjusting ring (19), the slide ring (18)
The magnitude of the pressing force (P) can be set to an arbitrary level by adjusting the biasing conditions for the driving bevel gear (14) by the pressurizing spring (15) through the axial movement of the pressurizing spring (15). can. That is, the magnitude of the pressing force CP) is
The magnitude of the rotational driving force (F) to be transmitted to the rigid roller (12) can be freely adjusted by adjusting it to match the weight (W) of the article to be transported placed on the roller device. Can be done.

As can be understood from the above description, according to the present invention, a rotary support member that movably supports an article to be conveyed, for example, a workpiece fixed on a pallet, is different from a conventional friction roller conveyor. is different from that in that it is not equipped with a bearing i structure inside itself, and is composed of a rigid roller (12) that does not have the possibility of changing the coefficient of friction of the rotational support member due to cutting oil etc. adhering to the workpiece. In addition, an adjustable rotational drive force transmission mechanism (work 0) having a sliding engagement function is arranged at a predetermined distance from the position where the workpiece is supported by the rigid roller (12). , it is possible to reliably form an article conveyance roller device that has excellent operational stability and is free from the possibility that the transmission characteristics of the rotational driving force (F) will change due to adhesion of cutting oil or the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view illustrating the overall structure of the apparatus of the present invention, and FIG. 2 is a partial vertical sectional view showing an enlarged view of the main structure. Further, FIG. 3 is a cross-sectional view showing an enlarged view of the main structure of a conventional friction roller conveyor.

Claims (1)

[Claims] (1) In a roller device in which a rigid roller is fixed to a plurality of rotating shafts arranged with their axial directions parallel to each other, a driven bevel gear is fixed to the base end of the rotating shaft, and A main bevel gear that meshes with the driven bevel gear is loosely fitted onto the drive shaft under bias from a pressure spring to form a mechanism for transmitting rotational driving force to the rigid roller. roller device.