JPH01285515A - Accumulating conveyer - Google Patents

Abstract

PURPOSE:To enable a mechanism to be arranged of a robot, stopper, etc., between right and left frame assembly units by conveying a weight object between the frame assembly units, arranged to right and left of an article conveying path, without traversing a rotary shaft. CONSTITUTION:A frame 16, forming a through hole 14 for an endless chain 12 to be able to penetrate running in a lengthwise direction, and a frame assembly unit 10, provided with two or more roller assembly units arranging the upper end part of a roller 18 to be exposed, are arranged parallelly to right and left of an article transfer feed region further providing a space. A roller assembly unit 20 contains a supporting shaft 22, paired bearings 24, rotary shaft 26, oil-contained metal 28 and a sprocket wheel 30. Since both ends of the supporting shaft 22 in the roller assembly unit 20 are fixedly mounted to horizontal mounting surfaces 32A, 32B further, on this supporting shaft 22, the rotary shaft 26 is supported through the pair of bearings 24 arranged with a space in the axial direction, a conveyer is able to sufficiently withstand even a weight cargo article for its transfer feed.

Description

[Detailed description of the invention] [Industrial application field]

This invention relates to improvements in accumulation conveyors.

[Conventional technology]

Conventionally, the conveyor is driven by a chain, belt, etc. to transport an article placed on a roller, and when the article is stopped by a stopper on the conveyor, the rotating shaft driven by the chain, etc. idles with respect to the roller. Accumulating conveyors are known. Examples of such an accumulation conveyor include those disclosed in Japanese Utility Model Application Publication No. 59-8916, Japanese Utility Model Application Publication No. 59-61109, and the like. These consist of a synthetic resin cylindrical member integrally formed with a sprocket wheel that is rotatably fitted onto a shaft fixed to the frame, a low-friction bushing is fixed to the outer periphery of this cylindrical member, and A plurality of roller units, each consisting of a plastic roller rotatably fitted around the outer periphery of a bushing, are arranged on both sides of the article conveyance path. The synthetic resin 7-cumulate conveyor shown above is
This is only for transporting items with a light load.
Not suitable for transporting heavily loaded items. In particular, since both ends of the shaft that supports the load of the article and roller unit are supported by penetrating the vertical wall of the frame, in addition to the roller unit being made of synthetic resin, it is difficult to convey heavy loads. The problem is that it cannot be applied. On the other hand, as disclosed in JP-A-61-257813, for example, an oil-impregnated bearing fixed to a rotating shaft,
A friction roller conveyor has been proposed that includes a roller loosely fitted to the oil-impregnated bearing so as to be relatively rotatable. This friction roller conveyor is able to withstand heavy loads by having a rotating shaft rotatably supported at both ends by frames placed on the left and right sides of the article conveyance path, and oil-impregnated bearings attached to this rotating shaft. .

[Problem to be solved by the invention]

However, as described above, if the rotation axis is arranged so as to cross between the frames arranged on the left and right sides of the article conveyance path, for example, a robot that appears above and disappears from the article conveyance surface between the left and right frames. , a problem arises in that it is not possible to arrange a stopper or the like.

[Purpose of the invention]

This invention has been made in view of the above-mentioned conventional problems, and can be applied to transporting heavy loads without placing a rotating shaft across the frames on the left and right sides of the transport path. The purpose is to provide an accumulation conveyor.

[Means to solve the problem]

This invention includes a frame in which a through hole is formed through which a drive belt such as a chain or belt can run through in the longitudinal direction, and rollers arranged in the frame at appropriate intervals in the longitudinal direction and at least the upper end portions of the rollers are exposed. a frame assembly comprising: a plurality of roller assemblies fixed to the frame; a shaft, a pair of bearings arranged apart in the axial direction on the support shaft, a rotary shaft rotatably supported coaxially with the support shaft via the bearings, and the rotary shaft. a cylindrical oil-impregnated metal fitted to the outer periphery of the oil-impregnated metal; and the roller loosely fitted to the outer periphery of the oil-impregnated metal so as to be relatively rotatable; the frame includes a rotationally driven driving wheel, and the frame is configured to form a horizontal mounting surface on its upper surface on which at least both ends of the support shaft of the roller assembly are mounted and fixed. The above purpose is achieved by constructing an accumulation conveyor. Further, a roller cover that covers the roller assembly fixed to the mounting surface is detachably attached to the frame, and the roller cover has a hole that exposes the upper end of the roller in the roller assembly. This system is equipped with the following to achieve the above objectives.

[Effect]

In this invention, at least both ends of the support shaft in the roller assembly are mounted and fixed on a horizontal mounting surface formed on the frame, and a pair of support shafts are arranged on the support shaft at a distance in the axial direction. Since the rotating shaft is supported through the bearing, it can sufficiently withstand the transportation of heavily loaded articles. Furthermore, since the rotating shaft does not cross between the frames arranged on both sides of the article conveyance path, it is possible to easily arrange a robot, a stopper, etc. between the frames.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in the first factor, this embodiment includes a frame 16 in which a through hole 14 through which an endless chain 12 can run in the longitudinal direction is formed, and rollers installed in the frame 16 at appropriate intervals in the longitudinal direction. A frame assembly 10 including a plurality of roller assemblies 20 each having an exposed upper end portion of the frame assembly 18 is disposed parallel to the left and right sides of the article transfer area and spaced apart from each other. The solid body 20 includes a support shaft 22 fixed to the frame 16, and a support shaft 22 fixed to the frame 16.
a pair of bearings 24 spaced apart in the axial direction;
A rotating shaft 26 coaxially and rotatably supported by the support shaft 22 via this bearing 24, a cylindrical oil-impregnated metal 28 fitted on the outer periphery of this rotating shaft 26, and this oil-impregnated metal 28. a sprocket wheel 30 that is disposed coaxially and integrally with the rotating wheel 26, engages with the endless chain 12, and is rotationally driven; The frame 16
, horizontal mounting surfaces 32A and 32B are formed on the upper surface thereof, on which both ends of the support shaft 22 of the 0-ra assembly 20 are mounted and fixed, so that the accumulation conveyor It is composed of A roller cover 34 is provided on the frame 16 to cover the roller assembly 20 fixed on the mounting surfaces 32A and 32B.
is attached removably. This roller cover 34 has a hole 34 for exposing the upper end of the row 518 in the roller assembly 20.
A is formed. Here, the frame 16 is constructed by extrusion molding an aluminum alloy, and its cross section is made equal in the longitudinal direction. The through hole 14 includes an upper through hole 14A through which the endless chain 12 on the outward path passes, and an upper through hole 14A through which the endless chain 12 on the return path passes.
The upper through hole 14A and the lower through hole 14B pass through the horizontal partition wall 16.
They are vertically separated by A. The upper through hole 14A is opened upward toward the upper part of the frame 16 between the mounting surfaces 32A and 32B. A vertical wall 16B is formed adjacent to the outer side in the width direction of the conveyance path on the mounting surfaces 32A and 32B, and the mounting surface 32
A bearing fixing plate 36 which also serves as a side guide is arranged along the vertical wall 16B on the outside of A in the longitudinal direction of the frame 16. Positioning holes 36A are formed in the bearing fixing plate 36 at regular intervals in the longitudinal direction for receiving the outer ends of the support shafts 22 in the transport path width direction. The support shaft 22 is placed on the mounting surface 32A132B with one end fitted into the positioning hole 36A, and the opposite end is fixed to the mounting surface by the shaft fixing saddle 38. 32B. Reference numerals 40A and 40B in the figure indicate chain rails for guiding the endless chain 12, which are disposed at the bottoms of the upper through-hole 14A1 and the lower through-hole 14B, respectively. Further, reference numeral 42 in the figure indicates a bearing cover for the bearing 24. In this embodiment, a mounting surface 32A132B is formed on a part of the upper surface of the frame 16, and the support shaft 2
2 is placed and fixed, it can withstand heavy loads. Furthermore, the support shaft 22 fixed to the mounting surface 32A132B has a bearing 24 spaced apart from each other in the axial direction.
Since the rotary shaft 26 is supported, even heavily loaded articles can be conveyed in an easy to carry manner. Also, in this embodiment, the left and right frame assemblies 10.
Since there is a space between 10 and no rotating axis crossing this space, necessary equipment such as a robot and a stopper can be placed here. Moreover, especially in this embodiment, the bearing fixing plate 36 is mounted along the vertical wall 16A, and the support shaft 22 can be positioned and fixed by the positioning hole 36A formed in the bearing fixing plate 36. This has the advantage that there is no need to drill holes in the frame 16 itself for positioning the support shaft 22. Furthermore, in this embodiment, the O-ra assembly 20 is covered by the roller cover 34, and only the upper end of the roller 18 is exposed, so that safety during article transportation can be improved. At the same time, it is possible to prevent foreign matter from getting caught in the roller 18. Furthermore, the roller assembly 20 can be easily taken out and attached to the frame 16 by removing the shaft fixing saddle 38, which facilitates replacement and maintenance. Next, a second embodiment of the present invention shown in FIG. 2 will be described. In this second embodiment, the configurations of the O-ra assembly 20, roller cover 34, etc. are almost the same as those of the first embodiment shown in FIG.
a lower through hole 46B that opens outward in the width direction; and a main through hole 46A that extends downward to a position where the roller assembly 20 is disposed and adjacent to the inner side in the width direction of the lower through hole 46B; They differ in that they are composed of The opening of the lower through hole 46B is covered by a cover 48 which also serves as a reinforcing member of the frame 44. Further, the bearing fixing plate 5o for positioning the support shaft 22 in the roller assembly 20 has an inverted cross section and is fastened to the upper end of the vertical wall 44B of the frame 44. Regarding other components, the same reference numerals are given to the same members as in FIG. 1, and the description thereof will be omitted. In this embodiment, compared to the first embodiment, the lower part of the main through hole 46A functions as an oil receiver and a foreign object receptacle, and by removing the cover 48, the lower part of the main through hole 46A functions as an oil receiver and a foreign object receptacle. Maintenance of the endless chain 12 can be facilitated. Next, a third embodiment of the present invention shown in FIG. 3 will be described. This third embodiment is used when transporting particularly heavily loaded articles. In this third embodiment, the roller assembly 52 includes a hollow support shaft 54, a pair of bearings 56 disposed inside the hollow support shaft 54 and at both ends in the axial direction, and the bearings 56. As a result, a rotary shaft 58 is rotatably disposed coaxially with the support shaft 54, and a protruding end portion 58A of the rotary shaft 58 that protrudes inward in the width direction of the transport path from the hollow support shaft 54. A fitted cylindrical oil-impregnated metal 60, a cylindrical roller 62 loosely fitted around the outer periphery of this oil-impregnated metal 60, and a protruding end 58B of the rotary ring 58 opposite to the protruding end 58A. sprocket wheel 64,
It consists of The hollow support shaft 54 is fixedly mounted on a horizontal mounting surface 66 formed on the upper surface of a frame 66 by bolts 68. Here, the frame 66 includes a sub-frame 66A attached to cover the roller assembly 52 and the endless chain 12. In this embodiment, the support shaft 54 is formed into a hollow shape, and the rotation shaft 58 is supported inside the support shaft 54, so that the rotation shaft 58 can be made long and the roller 62 can also be made wide. Therefore, it can be used to transport particularly heavy items. Moreover, since the supporting shaft 54 is placed and fixed on the mounting surface 68 of the frame 66 over its entire length range, it can withstand a large load.

【Effect of the invention】

Since the present invention is constructed as described above, it is possible to transport a heavy article between the frame assemblies arranged on the left and right sides of the article conveyance path without having to cross the rotating shaft. This has an excellent effect in that mechanisms such as robots and stoppers can be placed between three-dimensional spaces.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an accumulation conveyor according to the present invention, FIG. 2 is a sectional view showing an accumulation conveyor according to a second embodiment of the invention, and FIG. 3 is a sectional view showing an accumulation conveyor according to a second embodiment of the invention. It is a sectional view showing an accumulation conveyor concerning an example. DESCRIPTION OF SYMBOLS 10... Frame assembly, 12-... Endless chain, 14... Through hole, 16.44.66... Frame, 18.62... Roller, 26.52... 0-R set Solid, 22.54... Support shaft, 24.56... Bearing, 26.58... Rotating shaft, 28.60... Oil-impregnated metal, 30.64... Sprocket wheel, 32A, 32
B, 68... Placement surface, 34... Roller cover, 34 A-... Hole.

Claims (2)

[Claims] (1) A frame having through-holes through which a drive band such as a chain or belt can run in the longitudinal direction, and rollers arranged in this frame at appropriate intervals in the longitudinal direction, with at least the upper end portions of the rollers being exposed. a frame assembly including a plurality of roller assemblies, and a frame assembly including a plurality of roller assemblies, and
The roller assembly includes a support shaft fixed to the frame, a pair of bearings arranged apart from each other in the axial direction on the support shaft, and a pair of bearings arranged apart from each other in the axial direction. a rotating shaft rotatably supported coaxially with the support shaft; a cylindrical oil-impregnated metal fitted on the outer periphery of the rotating shaft; a drive wheel disposed coaxially and integrally with the rotating shaft and engaged with the drive band to be rotationally driven; An accumulation conveyor characterized in that a horizontal mounting surface is formed on which at least both ends of the ring are mounted and fixed. (2) A roller cover that covers the roller assembly fixed to the mounting surface is removably attached to the frame, and the roller cover has a hole that exposes the upper end of the roller in the roller assembly. 2. The accumulation conveyor according to claim 1, further comprising: a.