JP2654838B2 - Drive roller device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive roller device used for, for example, a roller conveyor incorporated in a shelf facility or a roller conveyor installed on a floor.

2. Description of the Related Art Conventionally, as a roller conveyor using a drive roller device, for example, a structure disclosed in Japanese Patent Application Laid-Open No. 57-160807 has been provided. In this conventional structure, a large number of rollers are provided only freely in a main body frame (parallel frame) to form a transport path, and a case is provided on the main body frame side via a support bracket or the like. In this case, a pin is provided along the roller axis, and a wheel that can simultaneously contact the outer peripheral lower portions of a pair of adjacent rollers and a passive sprocket are provided on the pin so as to be integrally rotatable, A drive chain supported and guided on the case side is engaged with a sprocket. A diaphragm is provided between the case and the pin to move the pin up and down.

According to this conventional type, a wheel is rotated by a drive chain via a sprocket, and the rotation of the wheel is transmitted to a pair of rollers that are in contact with each other. To be transported. By controlling the supply and discharge of the diaphragm and moving the pins up and down, the mode is switched between a drive mode in which the wheel is in contact with the roller and a non-drive mode in which the wheel is separated from the roller, and transport to the transported object. The force is cut off, and the transported objects are controlled so as not to collide.

Problems to be Solved by the Invention According to the above-mentioned conventional type, since the wheels and the like are disposed below the rollers, the whole is sublime and large.
In addition, oil and dust on the transported object side easily intervene between the roller and the wheel, which adversely affects transmission of rotational force due to contact.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive roller device that can be compactly assembled as a whole and that does not involve any other object in a rotational force transmitting portion.

Means for Solving the Problems In order to achieve the above object, a drive roller device according to the present invention comprises a roller shaft supported by a frame, an outer fitting that is freely rotatable around the roller shaft, and a passive portion at an outer end. A tubular body having a roller body which is fitted over the roller shaft from the tubular member and is freely rotatable; and which is attached to the tubular member and which can freely contact and separate from the inner surface of the roller body by expansion and contraction. It comprises a flexible body and a fluid supply / discharge passage opening from the roller shaft through the tubular member into the flexible body.

According to the configuration of the present invention described above, the flexible body can be integrally rotated by applying a rotational force to the passive portion. In this state, a fluid is supplied into the flexible body through the fluid supply / discharge path, and the flexible body is expanded by the pressure, whereby the flexible body can be brought into contact with (pressed against) the inner surface of the roller body. The transported object can be transported by rotating the roller body integrally. Further, when the pressure in the flexible body is released through the fluid supply / discharge passage, the flexible body contracts and separates from the inner surface of the roller body, so that the rotational force is not transmitted and the rotation of the roller body is stopped.

The overall strength can be increased by interposing the cylindrical member, and the conveyance and the conveyance stop can be stably performed.

Embodiment An embodiment of the present invention in which a drive roller device is incorporated in a shelf facility will be described below with reference to the drawings.

3 and 4, reference numeral 1 denotes a shelf frame, which includes a plurality of left and right front supports 2, a plurality of left and right rear supports 3, a front cross member 4 connecting the front supports 2, and a rear support 3. And the front and rear members 6 for connecting the front support 2 and the rear support 3 to each other. Supports 2 and 3 of this shelf frame 1 and each material 4-6
In the compartment storage space 7 formed in a plurality of sections in the left-right direction and a plurality of sections in the up-down direction, a transfer device 12 including a pair of left and right conveyors 10, 11 is horizontally arranged with the transfer direction 13 as a depth direction. Has been established. That is, as shown in FIGS. 1 to 3, the conveyor frame 14 of one of the conveyors 10 is used.
Has a cross-sectional shape by a pair of left and right side plates 15 and 16, upper plates 17 and 18 bent outward from the upper ends of both side plates 15 and 16, and a bottom plate 19 connecting the lower ends of both side plates 15 and 16. Is formed. From the upper part of the side plates 15, 16 to the upper plates 17, 18, a plurality of cutting blows 20, 21 for attaching a drive roller device (described later) are formed at a predetermined pitch in the length direction, and one of the cut blows 20, 21 is formed. A bolt hole 22 for fixing a guide rail (described later) is formed in a lower portion of the side plate 15. The conveyor frame 14 thus formed is detachably fixed to the shelf frame 1. For this purpose, a bolt hole 23 is formed in the bottom plate 19 and a nut 24 corresponding to the bolt hole 23 is formed.
Are fixed on the bottom plate 19 in the conveyor frame 14, and bolts 26 passed from below through through holes 25 formed in the cross members 4,5.
Can be freely fitted to the nut 24 through the bolt hole 23.

The drive roller device 30 has hard roller caps 32 and 33 externally fitted to both ends of the roller shaft 31. By dropping these caps 32 and 33 into the cutouts 20 and 21 from above, the roller shaft 31 is supported on the conveyor frame 14 side.
A cylindrical member 35 is freely rotatably fitted to the roller shaft 31 via a bush 34, and a sprocket 36 which is an example of a passive portion is integrally provided at one outer end of the cylindrical member 35. I have. A cylindrical roller body 37 externally fitted from the cylindrical member 35 to the roller shaft 31 is a bearing provided between the cylindrical member 35 and the cylindrical member 35.
The bearing 39 provided between the roller shaft 31 and the roller shaft 38 allows free rotation. Between the two bearings 38 and 39, the inner surface 37a of the roller body 37 is added to the cylindrical member 35 by expansion and contraction.
A rubber tube 40, which is an example of a flexible body that can be brought into contact with and separated from the outside, is externally fitted.
It is fixed to the cylindrical member 35 via 41 and 42. The rubber tube 40 includes a pair of left and right cylindrical portions 40a on which the bands 41 and 42 act,
A flange portion 40b continuously provided from the inner end of the cylindrical portion 40a to the outside,
A contact portion 40d is provided between the outer ends of these flange portions 40b via an elastic portion 40c.The elastic portion 40c elastically urges the contact portion 40d to be separated from the inner surface 37a. . The rubber tube 40 is formed of a material that increases the frictional force at the contact portion 40d. A fluid supply / drain passage 43 that opens from the roller shaft 31 through the cylindrical member 35 into the rubber tube 40 is formed from one end to the middle on the axis of the roller shaft 31 and opens radially. Channel 43a, an annular channel 43b recessed into the inner surface of the cylindrical member 35 so that the shaft portion channel 43a always communicates, and a rubber tube
A cylindrical channel 43c formed in the cylindrical member 35 so as to communicate with the inside 40,
One of the caps 32 to communicate with one end of the shaft passage 43a
And the pipe flow path 43d formed in the above. 44, 45, and 46 indicate seal members, and 47 indicates a collar.

A guide rail 50 is provided at one corner at the bottom in the conveyor frame 14 over its entire length. The guide rail 50 has a dovetail groove 51 on the outside and a pair of upper and lower guides 52, 53 on the inside. Having. A plate-shaped nut body 54 is slidably fitted into the dovetail part 51, and a bolt 55 passed from the outside into the bolt hole 22 is fitted to the nut body and tightened, so that the bolt 55 is fixed to the conveyor frame 14. Guide rail 50
Can be fixed.

A chain 56, which is an example of a driving body, is provided with the sprocket 36.
The upper path that always meshes with the upper guide section 52
The lower path is supported and guided by the lower guide section 53. The chain 56 is stretched between a driving sprocket 57 and a driven sprocket 58 via a guide sprocket 59 or the like, as shown in FIG.
Is linked to the motor 60. Reference numeral 61 denotes a transport route.
62 is a load, which is handled via a pallet 63.

As shown in FIGS. 1 and 3, the conveyor frame 64 of the other conveyor 11 includes a pair of left and right side plates 65 and 66,
Upper plates 67, 68 bent outward from the upper ends of both side plates 65, 66 and a bottom plate 69 connecting the lower surfaces of both side plates 65, 66 are formed in a sectional shape. From the upper part of the side plates 65, 66, the upper plate 67,
Over 68, a plurality of notches 70, 71 for mounting idle rollers (described later) are formed at predetermined pitches in the length direction. A bolt hole 72 is formed in the bottom plate 69, and a nut 73 matching the bolt hole 72 is attached to the bottom plate 69.
A bolt 75 fixed on the top 69 and passed through a through hole 74 formed in the cross members 4 and 5 from below is inserted into the nut through a bolt hole 72.
The conveyor frame 64 is made detachable with respect to the shelf frame 1 by making it conform to 73.

The idler roller 80 has hard rubber caps 82 and 83 externally fitted to both ends of a roller shaft 81 thereof.
The roller shaft 81 is supported by the conveyor frame 64 by dropping the 83 into the notches 70, 71 from above. Then, the roller main body 84 is fitted around the roller shaft 81 via a bearing or the like so as to freely rotate.

As described above, the transport device 12 including the pair of conveyors 10 and 11 is, for example, as shown in FIG. 5, a group of six (plural) rollers arranged in a predetermined arrangement in the transport direction.
13 shows a plurality of groups, and in the embodiment, eight groups A, B, C, D, E, F,
G and H are provided, and rubber tubes 4 for each group A to H
0 is free to contact and separate. That is, for each group, a supply / discharge hose 90 in which the pipe flow paths 43d are connected in series is provided, and these supply / discharge hoses 90 are connected to a common supply hose 93 from a supply device 92 via an electromagnetic valve 91. It can be cut off freely. 94 indicates a regulator, and 95 indicates a silencer. On the downstream side of each of the groups A to H, an optoelectronic switch 96, which is an example of a presence detector, is provided. Here, in the two groups adjacent in the transport direction, when the optoelectronic switch 96 of the upstream group is detected and the optoelectronic switch 96 of the downstream group is not detected, the rubber tubes 40 of both groups are simultaneously abutted ( The supply hose 93 communicates with the supply / discharge hose 90). When the optoelectronic switches 96 of both groups are simultaneously detected or not detected simultaneously, the rubber tubes 40 of both groups are simultaneously moved apart (the supply hose 93 and the supply / discharge hose 90 are cut off). For this purpose, each solenoid valve 91 is incorporated in a respective control unit 97. Also, only the lowermost group A is configured so that the rubber tube 40 moves away when the optoelectronic switch 96 detects and moves. Reference numeral 98 denotes a stopper.

Next, the operation of storing and transporting the load 62 in the above embodiment will be described.

The imaginary line in FIG. 1 and the solid line in FIG. 2 indicate that the solenoid valve 91 is switched to connect the supply hose 93 to the supply / discharge hose 90, and the rubber tube 40 is supplied with the pressure of air (fluid) supplied through the fluid supply / discharge passage 43. A state is shown in which the abutting portion 40d that expands and moves outward against the elastic portion 40c abuts (presses) on the inner surface 37a of the roller body 37. At this time, the chain 56 is constantly driven by the motor 60, and thus the cylindrical member 35 is connected to the roller shaft via the sprocket 36 engaged with the chain 56.
Spinning around 31. Further, since the rubber tube 40 which rotates integrally with the cylindrical member 35 is in contact with the inner surface 37a of the roller body 37, the roller body 37 is also forcibly rotated integrally. As a result, the drive roller device 30 of both conveyors 10, 11
The pallet 63 on the transport path 61 supported between the idle roller 80 and the idle roller 80 is transported on the transport path 61 while receiving the transport force due to the forced rotation of the drive roller device 30 group. Become. At this time, the non-driven idler rollers 80 perform the following rotation.

When the solenoid valve 91 is switched to shut off the supply / discharge hose 90 from the supply hose 93, the pressure in the rubber tube 40 is released, and the elastic portion 40c has an elasticity as shown by the solid line in FIG. 1 and the phantom line in FIG. The contact portion 40d moves inward by force and is separated from the inner surface 37a of the roller body 37. Therefore, the roller body 37 is not forcibly rotated, and the conveyance is stopped.

The transfer device 12 composed of the pair of conveyors 10 and 11 basically transfers the pallet 48 (load 47) as described above.
Is controlled based on the detection and non-detection of the. That is, when the transport path 61 is empty, the forklift truck 8 moves the pallet 63 onto the group H at the upstream end.
When the control unit 97 and the solenoid valve 91 are actuated, the rubber tube 40 abuts and moves, so that the group H photoelectric switch 96 detects but the group G photoelectric switch 96 does not detect. , G is forcibly rotated, and the pallet 63 is conveyed from the group H to the group G. When the pallet 63 enters the group G, the optoelectronic switch 96 of this group G is detected but the group F is not detected, so that the rubber tubes 40 of the groups G and F are brought into contact and the pallet 63 is moved to the group G. To group F. The pallets 63 sequentially conveyed to the downstream side in this way come into contact with the stopper 98 and stop, and are stored in the group A. When the optoelectronic switch 96 detects the pallet 63, the rubber tubes 40 of the group A move apart. The second pallet 63 is conveyed in the same manner, and is stored in the group B in contact with the pallet 63 of the group A. At this time, detection is performed in the group B, but since the detection is also performed in the group A, the rubber tube 40 of the group B is detected.
Will also move away. In such a work, for example, it is assumed that the pallets 63 are stored in all the groups A to H and all the rubber tubes 40 are moved apart. When the pallet 63 of the group A is taken out by the forklift truck 8 in this state, since the photoelectric switch 96 of the group A is not detected, the rubber tubes 40 of the groups A and B contact and move.
Thus, the pallet 63 of group B is transported to group A. Then, since the photoelectric switch 96 of the group B is not detected, the rubber tubes 40 of the groups B and C abut and move, so that the pallet 63 of the group C is transported to the group B. Pallet 63 by repeating such actions
Can be sequentially forwarded.

In the above embodiment, the cylindrical member 35 is externally fitted to the roller shaft 31, and the rubber tube 40 is attached to the cylindrical member 35. However, in the first invention, the roller shaft 31 is rotatably mounted on the conveyor frame 14. In this embodiment, the roller shaft 31 is supported, and the sprocket 36 and the rubber tube 40 are attached to the roller shaft 31.

Further, in the above embodiment, the conveyor 12 is constituted by the pair of left and right conveyors 10 and 11, but this is achieved by making the roller body 37 and the like longer so that the conveyor
12 may be configured.

Further, in the above embodiment, one of the conveyors 10 is entirely configured as the drive roller device 30, but this may be a conveyor configuration in which one or a plurality of idler rollers are arranged between the drive roller devices.

In the above embodiment, the type in which the transport device 12 including the conveyors 10 and 11 is incorporated in the shelf frame 1 is shown, but this may be a floor conveyor type installed under the floor.

According to the present invention having the above configuration, the flexible body is pressurized or released through the fluid supply / discharge path, and the flexible body is expanded and contracted to abut or separate from the inner surface of the roller body. The transfer of the transferred object can be performed by forcibly rotating the roller body, or the transfer of the transferred object can be stopped by canceling the forced rotation. By incorporating the flexible member that interrupts the transmission of the rotational force into the roller body in this manner, the entire body can be made compact and compact, and furthermore, it is possible to prevent other objects from intervening in the rotational force transmission portion. Can be prevented and its transmission can always be performed well.

Further, by interposing the tubular member, the overall strength can be increased, and the conveyance and the conveyance stop can be stably performed.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway side view, FIG. 3 is a front view of shelf equipment, and FIG. FIG. 5 is a schematic side view showing a use state. 1 ... shelf frame, 10, 11 ... conveyor, 12 ... transport device, 14
…… Conveyor frame, 20, 21 …… Notch, 30 …… Drive roller device, 31 …… Roller shaft, 32,33 …… Cap, 3
4 Bush, 35 Tube member, 36 Sprocket (passive portion), 37 Roller body, 37a Inner surface, 40
Rubber tube (flexible body), 40c: elastic part, 40d: contact part, 43: fluid supply / discharge path, 56: chain, 61: transport path, 62: load, 63: pallet, 64: Conveyor frame, 80: Idling roller, 90: Supply / discharge hose, 91: Solenoid valve, 96: Optoelectronic switch, 97: Control unit.

Claims (1)

(57) [Claims] 1. A roller shaft supported by a frame, a cylindrical member which is rotatably fitted to the roller shaft and has a passive portion at an outer end thereof, and is externally fitted from the cylindrical member to the roller shaft. A roller body that is freely rotatable and freely rotatable, a flexible body that is attached to the cylindrical member, and that can freely contact and separate from the inner surface of the roller body by expansion and contraction; and a flexible body that passes through the cylindrical member from the roller shaft. And a fluid supply and non-passage opening to the drive roller device.