JPH0351207A - Roller conveyor - Google Patents

Abstract

PURPOSE:To enable the alteration of roller pitch and continuous operation in a roller conveyor by providing rollers free to rotate in supporting frames free to move in lateral direction, providing a transmission roller free to connect and disconnect and a follower ring body free to move in vertical direction at the lower portion of the supporting frames, and connecting the follower ring body to a drive body. CONSTITUTION:A chain 24 is always driven by a motor, and a sprocket 20 is always rotated. The outer ring 21b of a transmission roller 21 is made in contact with a roller 13 by means of a spring to rotate the roller 13 forcibly and to transport a load to be transported. To lengthen a roller pitch P, bolts 10A and 10B are loosened and both supporting frames 9A and 9B are moved in the direction of a transport path 21 by the guidance of guides 2A and 2B. Then the bolts 10A and 10B are tightened to lock the frames. With this constitution, roller pitch can be altered though the conveyor is of continuous operation type.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roller conveyor that operates continuously but whose roller pitch can be arbitrarily changed.

2. Description of the Related Art Conventionally, this type of roller conveyor has been provided with a structure as shown in, for example, Japanese Patent Application Laid-Open No. 57-160807. This conventional structure has a main body frame (parallel rails)
A conveyance path is formed by providing a large number of rollers that can rotate freely, and a case is provided on the main body frame side via a support bracket or the like. The case is provided with a pin along the axis of the roller, and a wheel and a sprocket are provided on this pin so as to be able to freely rotate together with a sprocket that can simultaneously contact the lower outer periphery of a pair of adjacent rollers. A driving chain supported and guided by the sprocket is engaged with the sprocket.

According to this conventional method, a driving chain rotates a wheel through a sprocket, and the rotation of this wheel is
The information is transmitted to a pair of rollers that are in contact with each other, and the conveyed object is conveyed on the conveyance path by the rotation of the roller group.

Problems to be Solved by the Invention According to such a conventional type, each roller is fixed relative to the main body frame, so the roller pitch cannot be changed depending on the shape and length of the conveyed object. When the roller pitch is made dense so that objects of minimum shape and length can be smoothly transported, the entire system becomes expensive. Similarly, since each case is of a stationary type, a large number of them are required.

An object of the present invention is to provide a roller conveyor in which the roller pitch can be arbitrarily changed and the position of the transmission roller side can also be changed in accordance with the change.

Means for Solving the Problems In order to achieve the above objects, the roller conveyor of the present invention has the following features:
A support frame whose position can be changed with respect to the main body frame is provided, a roller is provided on the upper part of this support frame so that it can freely rotate, and a support shaft along the axis of the roller is attached to the lower part of the support frame so that it can freely swing up and down. , an upward movement imparting device interlocked with the support shaft is provided on the support frame, a transmission roller and a passive wheel body that can freely come into contact with the lower outer periphery of the roller are rotatably provided on the support shaft, and each passive wheel body is provided with a An interlocking driving body is provided on the main body frame side.

According to the configuration of the present invention, the drive body rotates the transmission roller via the passive wheel body, thereby forcibly rotating the roller that is in contact with the transmission roller. Furthermore, by changing the mounting position of the support frame to the main body frame, the roller pitch can be changed as desired, and the number of units consisting of rollers, transmission rollers, etc. can be increased or decreased as desired.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 7.

1 is a main body frame with a U-shaped cross section, and a pair of left and right side frames IA
, IB, and a base frame IC that connects the lower portions of these side frames IA and IB.

L-shaped guide portions 2A and 2B are formed on the opposing inner surfaces of both side frames IA and IB, and a nut body 3A is formed on the upper portion.
, 3B, dovetail groove portion 4A that allows sliding.

4B is formed. In addition, in one side frame IA, a pair of upper and lower guide rails 7.8 are disposed in the length direction of the frame on the inner side of the lower part thereof, respectively, through mounting parts 5 and 6.6 side frames LA, On the inner surface of the IB, resin support frames 9A and 9B are provided with their lower ends fitted so that their positions can be changed (slidably) in the length direction of the frame.
, 9B are fixed in the changed position by screwing the bolts IOA and IOB passed through the upper part into the nut bodies 3A and 3B. Further, locking portions 11A and IIB are formed at the upper portions of both support frames 9A and 9B, and these locking portions 11A and IIB are formed at the upper portions of both support frames 9A and 9B.
By locking both ends of the roller shaft 12 with the IB, a resin roller 13 is freely rotatably provided between the support frames 9A and 9B. One support frame 9A has a case shape, and is connected inward from the inner surface of the lower half of the base plate 14 with a base plate 14 formed with a lower end to be fitted into the guide portion 2A and a locking portion 11A. It is formed by a pair of front and rear cover plate parts 15 and a connecting plate part 16 provided between the lower ends of these cover plate parts 15. The other support frame 9B is formed into a rectangular plate shape. A support shaft 18 along the roller axis 17 is attached to one support frame 9A so as to be vertically swingable. That is, a cylindrical bearing part 19 is formed on the inner surface of the lower end of the base plate part 14,
The ball portion 18a formed at the inner end of the support shaft 18 is connected to the bearing portion 19.
It is fitted into the holder and can be freely swung up and down. Then, a resin-made L extension plate part 35 is attached between the free ends of the cover plate part 15, and the outer end of the support shaft 18 is fitted into a vertical elongated hole 36 formed in the vertical plate of this L extension plate part 35. ing.

A sprocket 2, which is an example of a passive wheel, is mounted on the support shaft 18.
A transmission roller 21 is fitted onto the boss portion of the sprocket 20 so that the two can rotate integrally through 20 degrees 21. This transmission roller 21 is connected to the support shaft 1
The outer ring 21b consists of an inner ring 21a made of metal or resin that is fitted onto the boss portion of No. can freely come into contact with the lower outer periphery of the roller 13. A coil spring 37, which is an example of an upward motion imparting device that brings about contact (pressure contact), is interposed between the lower surface of the outer end of the support shaft 18 and the horizontal plate of the L extension plate portion 35. The above-described units 9A, 9B to 22, 35 to 37 constitute one unit, and by arranging a large number of units on the main body frame 1, a conveyance path 23 is formed by a group of rollers 13. Chain 2 which is a common driving body linked to each sprocket 20
4 is supported and guided by both guide rails 7.8. Cheno 2
4 is stretched between a driving sprocket 25 and a driven sprocket 26 via a guide sprocket 27, etc., and operatively connects the driving sprocket 25 to a motor 29. 30 indicates an object to be transported.

Next, the conveyance work in the above embodiment will be explained.

FIGS. 1 and 6 show the usage state in which the roller pitch P is set to the shortest. The chino 24 is constantly driven by the motor 29, and therefore all the sprockets 20 engaged with the chino 24 rotate around the support shaft 18. Further, the transmission roller 21 forcibly rotates the group of rollers 13 due to the outer ring 21b being in contact with the lower part of the outer circumference of the roller 13 due to the elastic force of the coil spring 37.
can be transported on the transport path 23. Furthermore, when the conveyed object 30 is stopped by a stopper device (not shown), the friction conveying force on the roller 13 side against the conveyed object 30 is greater than the frictional force of the friction transmission section 22, so that the inner ring 21a The boss portion of the sprocket 20 rotates in sliding contact with the sprocket 20. As a result, although the sprocket 20 constantly rotates, the rotation of the roller 13 is stopped, and the conveyed object 30 is stored without sliding contact with the lower surface side.

When handling a long object 30' as shown in FIG. 7, the roller pitch P is made long and the roller 13
The number of units including the transmission roller 21 and the transmission roller 21 can be reduced. This is a 10A bolt.

After loosening 10B and moving both support frames 9A and 9B in the direction of the conveyance path 23 under the guidance of guide parts 2A and 2B,
Bolt I for nut bodies 3A and 3B that have moved into one body.
All you have to do is tighten and fix the OA and IOB, and at that time, you need to remove the extra rollers 13 and support frame 9A.

9B etc. are removed.

8 to 11 show another embodiment, that is, a roller axis 1 is located at a position near the base plate 14 of the double force bar plate 15.
A longitudinal axis 38 perpendicular to the longitudinal axis 7 is rotatably attached, and the base end of the support shaft 18 is attached to this longitudinal axis 38. A cylinder device 39, which is another example of an upward motion imparting device, is provided between the outer end of the support shaft 18 and the connecting plate portion 16.

Here, the cylinder device 39 connects the main body 39a to the connecting plate portion 16.
At the same time, the rod 39b is brought into contact with the support shaft 18.

According to this other embodiment, the transmission roller 21 is moved upward together with the support shaft 18 by the cylinder device 39, and the eighth
By pressing the rollers 13 as shown in FIGS. 9 and 9, the group of rollers 13 is forcibly rotated as in the drive area 31 shown in FIG. I can do it. Further, the transmission roller 21 is moved downward by the reverse operation of the cylinder device 39, and the imaginary line in FIG.
By separating the transmission roller 21 from the roller 13 as shown in FIG. 1O, the power transmission from the transmission roller 21 to the roller 13 is cut off, thereby causing By stopping the rotation of the roller group 13, the transported object 30 can be stored on the transport path 23.

At this time, the driving section 31 detects the conveyed object 30 using a sensing lever, a phototube device, etc., and sequentially forcibly rotates the roller 13 on the front side of conveyance of the conveyed object 30.
By sequentially controlling the rotation of the rollers 13 where the conveyed object 30 has passed to stop, it is possible to sequentially displace the rollers 13 in the conveying direction. In addition, at a specific location, a non-driving area 32 can be formed by a control signal etc. to store the transported object 30, and when a subsequent transported object 30 approaches this transported object 3o, the driven object 30 is automatically controlled. The area 31 is dissolved to become a non-driving area 32, allowing continuous storage without collision.

Effects of the Invention According to the present invention having the above-mentioned configuration, the transmission roller is rotated by the driving body via the passive wheel body, and the transmission roller is moved upward via the support shaft by the upward motion imparting device, thereby increasing the transmission speed. The object to be transported can be transported by forcibly rotating the roller that is brought into contact with the roller. In particular according to the invention 1
By changing the position of the support frame on the main body frame, the roller pitch can be changed arbitrarily.This allows the number of units consisting of rollers, drive rollers, etc. to be reduced depending on the shape and length of the transported object. In addition to reducing the overall cost, the drive device can be made more compact by reducing the number of units.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a partially cutaway side view of the main part, FIG. 2 is a partially cutaway front view of the same part,
Figure 3 is a plan view of the same, Figures 4 and 5 are perspective views of the support frame, Figures 6 and 7 are schematic side views of the whole, Figures 8 to 11.
The figures show another embodiment; FIG. 8 is a partially cutaway side view of the main part, FIGS. 9 and 10 are partially cutaway front views of the same, and FIG. 11 is a schematic side view of the whole. 1...Body frame, IA, IB...Side frame, 2A
. 2B...Guide part, 3A, 3B...Nut body, 7,
8... Guide rail, 9A, 9B... Support frame, 10
A. 10B... Bolt, IIA, IIB... Locking part, 1
3...Roller, 14...Base part, 16...Connecting plate part, 17...Roller shaft center, 18...Spin shaft, 20...
・Sprocket (passive wheel), 21... transmission roller,
21a...Inner shaft, 22...Friction transmission part, 23...
Conveyance path, 24... Cheno (driver), 29... Motor, 30... Object to be conveyed, 37... Coil spring (upward motion imparting device t), 39... Cylinder device (upward motion Applying device ri, P...Roller pitch. +l S 100

Claims (1)

[Claims] 1. A support frame whose position can be changed with respect to the main body frame is provided, a roller is provided at the top of this support frame so that it can freely rotate, and a support shaft along the axis of the roller is installed at the bottom of the support frame so that it can freely swing up and down. At the same time, an upward movement imparting device interlocked with this support shaft is provided on the support frame, and a transmission roller and a passive wheel body which can freely come into contact with the lower part of the outer circumference of the roller are rotatably provided on the support shaft, and each driven wheel A roller conveyor characterized in that a driving body that moves with the body is provided on the main body frame side.