JPH045606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is capable of supporting and transporting a load directly or via a pallet, and in this case, the transport speed can be set in multiple stages while the speed of the drive device is constant. The present invention relates to a conveyor device.

BACKGROUND ART Conventionally, as this type of conveyor device, there has been provided a variable speed article conveying device as shown in, for example, Japanese Utility Model Application Publication No. 53-30679. In this conventional type, a pin is attached to a conveyor belt such as a conveyor chain, and a guide roller and an article support roller having a conical peripheral surface with a larger diameter than the guide roller are inserted into the pin so as to freely rotate. There is. The guide rollers roll on fixed rails to guide the conveyance belt, and the article support rollers roll on speed increasing rails that are moved up and down.

According to this conventional method, by separating the speed increasing rail from the article support roller, the article supported by the article support roller is transported at the same speed as the conveyance belt. By bringing the speed-increasing rail into contact with the article support roller, the article support roller is forcibly rotated as the conveyance belt moves, and the article is transported at an increased speed.
Further, the speed increase can be adjusted by changing the contact position of the speed increase rail with respect to the conical surface of the article support roller.

Problems to be Solved by the Invention According to the conventional configuration described above, a fixed rail and a speed increasing rail are always required over the entire length of the route, regardless of the speed mode, which is disadvantageous in terms of cost. Furthermore, a large number of devices are required to raise and lower the speed increasing rail, making the structure and control complicated. Furthermore, foreign matter may fall from the load placed on the pallet during conveyance, adversely affecting the support and guidance of the conveyance belt.

An object of the present invention is to provide a conveyor device that can use a portion of the rails, eliminate the need for a lifting device, and minimize the intrusion of falling foreign objects.

Means for Solving the Problems In order to solve the above problems, the conveyor device of the present invention is provided with a guide rail disposed at the lower part of the profile rail, and a moving body guided by the guide rail is moved to an appropriate position. A horizontal axis in a direction perpendicular to the direction is fixed, and a first rotating body and a second rotating body are attached to both sides of the horizontal axis so as to freely rotate, and the first rotating body is located inside. It has a large diameter part that supports the transported object, and a first small diameter part that is smaller than this and is located on the outside, and also has a second small diameter part that is located outside of the first rotating body.
The rotating body has a second small diameter part having the same diameter or approximately the same diameter as the first small diameter part, and a first rail that can freely come into contact with the first small diameter part along the movement path, and a second small diameter part. A second rail that can freely come into contact with the large diameter part, and a third rail that is replaced with the guide rail and that guides the moving body and can come into contact with the large diameter part.
In order for this to work, each rail is detachably attached to the form rail, and from the top of the form rail,
An inner protrusion that covers the upper part of the first small diameter part and the second small diameter part is provided in succession.

Effect According to the above configuration, the movable body is guided by the guide rail, so that the movable body is moved without causing lateral displacement. By abutting and supporting the second small diameter portion of the second rotating body on the second rail, the second rotating body frictionally rolls on the second rail, but the first rotating body does not rotate. Therefore, the object to be transported can be transported at a maximum of the first stage speed, which is the same speed as the moving body, by the frictional force between the horizontal shaft and the second rotating body. At this time, since the horizontal shaft and the second rotating body have a structure that allows them to slip, the object to be transported can be forcibly stopped by an external force. Furthermore, by supporting the large diameter portion of the first rotating body in contact with the third rail, it is possible to achieve a conveyance mode in which the large diameter portion frictionally rolls on the third rail as the movable body moves. The object can be conveyed at a high second stage speed, which is the moving speed of the moving body plus the forward feeding speed of the large diameter section. At this time, the third rail guides the movable body, so the guide rail can be omitted. Furthermore, by supporting the small diameter part of the first rotating body in contact with the first rail, the first small diameter part will frictionally roll on the first rail as the movable body moves, and the large diameter part integral with this will roll on the first rail. It is possible to use a conveyance mode that rotates at an increased speed, so that the object to be conveyed can be conveyed at a higher third stage speed, which is the sum of the moving speed of the movable body and the increased forward feeding speed of the large diameter portion.

In addition, by providing an inner protrusion at the top of the form rail, the area of the upper opening of the form rail is reduced, so that if foreign objects fall from a load during transportation,
Intrusion of this foreign material into the interior of the profile rail through the upper opening of the profile rail can be minimized, and most of it can hit the inner protrusion and fall to the outside.

Embodiment An embodiment of the present invention will be described below based on the drawings.

1A and 1B are a pair of left and right profile rails, which are laid in parallel on the fixing member 2. Both profile rail 1
A and 1B are manufactured into various shapes based on weight reduction and strength, for example, by extrusion molding, but basically they have storage spaces 4A and 4B at the top having slits 3A and 3B on the upper surface. The bottom surfaces of the storage spaces 4A and 4B are formed in a round shape, with side fitting grooves 5A and 5B formed on the left and right side surfaces, respectively, and upper fitting grooves 6A and 6B formed on the left and right upward facing surfaces, respectively. is formed. Both storage spaces 4A, 4
At the bottom of B are a pair of left and right guide rails 7A,
7B is arranged, and these guide rails 7A, 7B
The inner surfaces facing each other are formed as guide surfaces 8A, 8B, and the outer surfaces are integrally formed with protruding fitting portions 9A, 9B which can be fitted into and removed from the side fitting grooves 5A, 5B. By moving the guide rails 7A, 7B in the length direction, they can be inserted into and removed from the profile rails 1A, 1B. Further, the third rails 10A, 10B are provided in the side fitting grooves 5A, 5B of the profile rails 1A, 1B with protruding fitting portions 11A, 1.
The guide rails 7A and 7B can be selectively attached and detached via the guide rails 1B. These third rails 10
A, 10B have guide surfaces 12A, 12B that also serve as guide rails 7A, 7B, and the upper surfaces serve as large diameter portion receiving surfaces 13A, 13B. For the upper fitting grooves 6A, 6B, a first rail 16A, which has protruding fitting parts 14A, 14B at the lower part and whose upper surface is formed into the first small diameter part receiving surfaces 15A, 15B,
16B, and second rails 19A, 19B having projecting fitting portions 17A, 17B at their lower portions and having second small diameter portion receiving surfaces 18A, 18B on their upper surfaces can be selectively attached and detached. 20A, 20B are roller chains (an example of a moving body) guided by the profile rails 1A, 1B, and the rollers are guided by the guide surfaces 8A, 8B, 1.
You will be guided to 2A and 12B. Boss members 21A, 21B are erected from chain links at appropriate positions of these roller chains 20A, 20B, and horizontal shafts 22A, 22B in a direction perpendicular to the movement direction are inserted through these boss members 21A, 21B, and the intermediate portion is fixed with pins 23A and 23B. First rotating bodies 24A, 2 are provided on both sides of the horizontal shafts 22A, 22B.
4B is fitted on the outside so that it can freely rotate, and a second
The rotating bodies 25A, 25B are fitted onto the outside so that they can rotate freely, and retaining pins 26A, 26B are inserted. The first rotary bodies 24A, 24B have large diameter portions 28A, 28B that are located inside, support a pallet (an example of a transported object) 27, and can freely come into contact with the large diameter portion receiving surfaces 13A, 13B. It has first small diameter portions 29A, 29B which are smaller than the first small diameter portions and can freely come into contact with first small diameter portion receiving surfaces 15A, 15B located on the outside. Further, the second rotating bodies 25A, 25B located outside the first rotating body have the first small diameter portions 29A, 29
A second small diameter portion 30A that has the same diameter or approximately the same diameter as B and can freely come into contact with the second small diameter portion receiving surfaces 18A, 18B,
It has 30B.

Further, the inner protruding portions connected from the upper ends of the profile rails 1A, 1B are connected to the first small diameter portions 29A, 29B and the second small diameter portion 30 over the entire length of the conveyor device.
It covers the upper part of A and 30B. As a result, the slits 3 provided on the upper surface of the profile rails 1A, 1B
The widths of the slits 3A and 3B are large enough to allow the large diameter portions 28A and 28B to be installed with their upper portions protruding above the slits 3A and 3B, but the widths of the slits 3A and 3B are made as small as possible. Can be set. 31A and 31B indicate guide plates.

Next, three types of conveyance states in the above embodiment will be shown. FIG. 1 shows a state in which the guide rails 7A, 7B and the second rails 19A, 19B are attached, and at this time, the second small diameter portions 30A, 30B are in contact with the second small diameter portion receiving surfaces 18A, 18B. The roller chains 20A, 20B are guided by the guide surfaces 8A, 8B and move without any lateral slippage, and at this time, the second rotating bodies 25A, 25B move against the second rail 1.
Friction rolls on 9A and 19B. However, since no rotational force is applied to the first rotating bodies 24A, 24B, the large diameter portions 28A, 28B are stopped from rotating.
The pallet 27 supported by the horizontal shafts 22A, 22
Due to the frictional force between B and the second rotating bodies 25A and 25B, the first stage speed is at most the same as that of the roller chains 20A and 20B. At this time, the horizontal axis 2
Since the second rotating bodies 2A, 22B and the second rotating bodies 25A, 25B have a slip structure, the pallet 27 can be forcibly stopped by an external force such as a stopper. FIG. 2 shows a state in which the guide rails 7A and 7B are removed and third rails 10A and 10B are installed in their place. ing. The third rails 10A, 10B have guide surfaces 12A, 1
2B is provided, and the roller chains 20A and 20B are guided by these guide surfaces 12A and 12B to move without lateral deviation, and the large diameter portion 2
Since the roller chains 8A and 28B frictionally roll on the third rails 10A and 10B, the large diameter portion 28 of the pallet 27 changes at the moving speed of the roller chains 20A and 20B.
It is conveyed at a high second stage speed in which the forward feed speed due to the rotation of A and 28B is added. Third
The figure shows guide rails 7A, 7B and first rail 16.
A and 16B are shown attached, and at this time, the first
The small diameter portions 29A and 29B are the first small diameter portion receiving surface 15.
It is in contact with A and 15B. Therefore, by moving the roller chains 20A and 20B, the first small diameter portion 2
9A, 29B frictionally roll on the first rails 16A, 16B, and the large diameter portions 28A, 28B, which are integrated with the first small diameter portions 29A, 29B, rotate at a high circumferential speed (increased speed). Palette 27
is the moving speed of roller chains 20A and 20B,
It is conveyed at a higher third stage speed in which the forward feed speed is added due to the accelerated rotation of the large diameter portions 28A and 28B.

In addition, the opening area of the slits 3A, 3B is reduced by consecutively arranging the inner protrusions from the upper ends of the profile rails 1A, 1B, so that if a foreign object falls from the load during transportation, the foreign object will fall into the slit 3A, 3B.
It is unlikely that the material will enter the inside of the profile rails 1A, 1B through the material, and most of it will hit the inner protrusion and fall to the outside.

Effects of the Invention According to the conveyor device of the present invention having the above configuration, by operatively arranging one of the three types of rails, the conveyor device according to each type can be operated without requiring a lifting device or complicated control. The object to be transported can be transported at any of three speeds. At that time, the moving object is guided by the guide rail, so
It can be moved without causing sideways slipping. Further, since the third rail also serves as a guide for guiding the moving body, there is no need to provide a new guide rail, and the cost is reduced accordingly. Furthermore, the inner protrusion connected to the profile rail makes it difficult for foreign matter to enter the interior of the profile rail, and as a result, the number of failures of the conveyor device due to foreign matter entering can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the invention, and FIG.
FIG. 2 is a longitudinal sectional front view of the main part in the second stage state, and FIG. 3 is a longitudinal sectional front view of the main part in the third stage state. 1A, 1B...Shape rail, 10A, 10B...
...Third rail, 16A, 16B...First rail,
19A, 19B...Second rail, 22A, 22B
... Horizontal axis, 24A, 24B ... First rotating body, 25
A, 25B...second rotating body, 28A, 28B...
Large diameter part, 29A, 29B...first small diameter part, 30
A, 30B...Second small diameter section.

Claims (1)

[Claims] 1. A guide rail is provided at the lower part of the profile rail, and a horizontal shaft in a direction perpendicular to the moving direction is fixed at an appropriate position of a moving body guided by this guide rail,
A first rotary body and a second rotary body are respectively attached to both sides of the horizontal shaft so as to be freely rotatable, and the first rotary body has a large-diameter portion located inside to support the conveyed object, and and a first small diameter portion located on the outside.
Moreover, the second rotating body located outside the first rotating body is
A first rail having a second small diameter part having the same diameter or substantially the same diameter as the first small diameter part and can freely come into contact with the first small diameter part along the movement path; and a first rail that comes into contact with the second small diameter part. A freely movable second rail and a third rail that is replaceable with the guide rail and that guides the moving body and can freely come into contact with the large diameter part, each rail is turned into a shape rail so that one of these rails can act. 1. A conveyor device, characterized in that an inner protrusion is disposed in a removable manner and extends from the upper part of the shape rail to cover the upper part of the first small diameter part and the second small diameter part.