JP2654860B2 - 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 on a main body frame (parallel rails) 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 pin up and down, the driving mode is switched between a driving mode in which the wheel is in contact with the roller and a non-driving mode in which the wheel is separated from the roller, and the transfer force to the transferred object is changed. Are controlled so that the objects to be transported do not collide with each other.

According to the above-mentioned conventional type, when using rollers having different diameters as the rollers, the case side must also incorporate different components, so that the case side has a plurality of types. Since it must be stored, its economy is poor and its diversion is poor. Since the wheels and the like are provided below the rollers, the whole is bulky 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.

The object of the present invention is to make the main part also available, to be able to cope with various diameter changes and to make the whole compact, and to make the rotation transmitting part free of other objects and to stabilize the rotation support. Another object of the present invention is to provide a drive roller device which can be operated without any leakage of the working fluid.

Means for Solving the Problems To achieve the above object, a drive roller device according to the present invention includes a roller shaft detachably supported on a frame,
A roller member that is fitted over the roller shaft and is free to rotate; a roller body that is fitted over the roller shaft from the tube member and is free to rotate via a bearing device; and a cylindrical member between the bearing devices. A flexible member which is fitted and fitted to the outside and which can freely contact and separate from the inner surface of the roller body by expansion and contraction; a fluid supply / discharge passage which opens into the flexible member through the roller shaft; And a large-diameter main body that can be externally fitted and fixed to the roller main body.

According to the configuration of the present invention described above, by applying a rotational force to the passive portion, the flexible body can be integrally rotated via the tubular member. 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.

At this time, by incorporating the transmitting portion of the rotational force by the flexible body into the roller body, the whole can be reduced in volume and compact, and the transmission of the rotational force can be achieved by positioning the flexible body between the bearing devices. No other things intervene in the club. Further, the rotation support on the roller body side can be stably performed by the paired bearing device or the like.

When it is desired to use a large-diameter roller, a large-diameter main body having a desired diameter may be externally fitted to the roller main body and fixed. High speed transfer is possible. At this time, the main parts such as a roller shaft, a cylindrical member, a bearing device, a flexible body, and a roller main body can also be used, and only a large-diameter main body having various diameters needs to be prepared.

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 FIG. 1 to FIG.
Conveyor frame 14 in 10, a pair of left and right side plates 15, 1
6 and upper plates 17, 18 bent outward from the upper ends of both side plates 15, 16
And a bottom plate 19 connecting the lower ends of both side plates 15 and 16 to form a U-shaped cross section. From the upper part of the side plates 15, 16 to the upper plates 17, 18, a plurality of notches 20, 21 for detachably attaching a drive roller device (described later) are formed at predetermined pitches in the length direction, A bolt hole 22 for fixing a guide rail (described later) is formed in a lower portion of one 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 fixed on the bottom plate 19 in the conveyor frame 14, and a through hole 25 formed in the cross members 4, 5 is formed. A bolt 26 passed from below is freely fitted to the nut 24 through the bolt hole 23.

The drive roller device 30 has parallel portions at both ends of the roller shaft 31.
31a are formed, and these parallel portions 31a are cut out by the notches 20, 21.
The roller shaft 31 is detachably and non-rotatably supported on the conveyor frame 14 side. A hard rubber cap 32 is externally fitted to one end of the roller shaft 31, and a snap pin 33 is attached to the other end.

A cylindrical member 35 is fitted to the roller shaft 31 via a bearing device 34 so as to freely rotate. Here, the bearing device 34 is formed by a pair of needle bearings 34A and 34B in the roller axis direction. The tubular member 35 includes an outer tubular portion 35A supported by the bearing device 34, and an inner tubular portion 35B partially fitted to the outer tubular portion 35A and integrated with bolts 36. A sprocket 37, which is an example of a passive portion, is integrally provided at one outer end of the outer cylindrical portion 35A.

A cylindrical roller body 38 externally fitted from the outer cylindrical portion 35A to the other side of the roller shaft 31 includes a pair of bearing devices 39A and 39B.
It is supported so that it can freely rotate. Here, bearing devices 39A, 39
B is an annular case 40A, 40B which is fitted and fixed at both ends of the roller body 38, and a large number of annular cases 40A, 40B arranged on the inner peripheral side of the annular cases 40A, 40B via outer rings 41A, 41B and side plates 42A, 42B. ball
43A, 43B, etc. The one ball 43A group is brought into contact with the outer peripheral surface of the outer cylindrical portion 35A, and the other ball 43B group is brought into contact with the outer peripheral surface of the ring member 44 which is fitted and fixed to the roller shaft 31 outside.

Between the two bearing devices 39A, 39B, in the inner cylindrical portion 35B,
A rubber tube 45, which is an example of a flexible body that can freely contact and separate from the inner surface 38a of the roller body 38 due to expansion and contraction, is externally fitted, and the rubber tube 45 is connected to an inner tube via a pair of bands 46A and 46B. It is fixed to the part 35B. The rubber tube 45
Is a pair of left and right cylindrical portions 45a on which the bands 46A and 46B act, a flange portion 45b provided continuously from an inner end of the cylindrical portion 45a, and an elastic member 45c between outer ends of the flange portions 45b. The elastic portion 45c elastically urges the contact portion 45d to be separated from the inner surface 38a. The rubber tube 45 is formed of a material that increases the frictional force at the contact portion 45d.

A fluid supply / discharge passage 47 that opens from the roller shaft 31 through the inner cylindrical portion 35B into the rubber tube 45 includes a roller shaft 31
A shaft portion flow path 47a formed from one end to the middle on the axis of the shaft and opening radially, and an outer surface of the roller shaft 31 and an inner surface of the inner cylindrical member 35B so that the shaft portion flow channel 47a always communicates. An annular flow passage 47b formed between the inner tube portion 35B and the inner tube portion 35B for communicating the annular flow passage 47b with the rubber tube 45.
7c and a pipe channel 47d formed in one cap 32 so as to communicate with one end of the shaft portion channel 47a. A seal device 48 is interposed between the roller shaft 31 and the inner cylindrical portion 35B so as to form therein an annular flow path 47b which is a part of the fluid supply / discharge path 47.

A guide rail 60 is disposed over the entire length at one corner at the bottom of the conveyor frame 14, and the guide rail 60 has a dovetail groove 61 on the outside and a pair of upper and lower guides 62, 63 on the inside. Having. A plate-shaped nut body 64 is slidably fitted into the dovetail portion 61, and a bolt 65 passed through the bolt hole 22 from the outside is fitted to the nut body 64 and tightened, so that the bolt 65 is fixed to the conveyor frame 14. Guide rail
60 can be fixed.

Chain 66, which is an example of a driving body, is provided with the sprocket 36.
The upper route which always meshes with the upper guide portion 62
The lower path is supported and guided by the lower guide section 63. As shown in FIG. 5, the chain 66 is stretched between a driving sprocket 67 and a driven sprocket 68 via a guide sprocket 69 or the like.
Are linked to the motor 70. Reference numeral 71 denotes a transport path.
Reference numeral 72 denotes a load, which is handled via a pallet 73.

As shown in FIGS. 1 and 4, the conveyor frame 74 of the other conveyor 11 includes a pair of left and right side plates 75 and 76,
Upper plates 77 and 78 bent outward from the upper ends of both side plates 75 and 76 and a bottom plate 79 connecting the lower ends of both side plates 75 and 76 are formed in a U-shaped cross section.

Notches 80, 81 for attaching idle rollers (described later) extend from the upper portions of the side plates 75, 76 to the upper plates 77, 78.
Are formed at predetermined pitches in the length direction.
And, while forming the bolt hole 82 in the bottom plate 79, a nut 83 matching the bolt hole 82 is fixed on the bottom plate 79, and a bolt 85 passed from below through a through hole 84 formed in the cross members 4, 5, The conveyor frame 74 is detachably attached to the shelf frame 1 by being engaged with the nut 83 through the bolt hole 82.

The idler roller 86 includes a roller shaft 87 and a roller body 88 which is rotatably fitted to the roller shaft 87 via a bearing or the like, and the parallel portions 87a formed at both ends of the roller shaft 87 are notched. By dropping into 80 and 81 from above, the roller shaft 87
Are non-rotatably and detachably supported on the conveyor frame 74 side. 89 indicates a snap pin.

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
5 is free to contact and separate. That is, in each group, a supply / discharge hose 90 in which the pipe flow paths 47d 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 45 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 activated or not detected, the rubber tubes of both groups are activated.
45 are configured to simultaneously move apart (cut off the supply hose 93 and the supply / discharge hose 90). 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 45 moves away when the optoelectronic switch 96 detects and moves. Reference numeral 98 denotes a stopper.

6 and 7 show a state where the large-diameter main body 50 is externally fitted and fixed to the roller main body 38. FIG. That is, the large-diameter main body 50 is cylindrical, and both ends are elastically abutting portions curved inward.
51 is formed. The large-diameter main body 50 is externally fitted to the roller main body 38 against the elasticity of the elastic abutting portion 51, so that the two members 38, 50 can be integrated by the elastic force of the elastic abutting portion 51. The integration may be performed firmly by welding. When using the annular cases 40A, 40B having positioning flanges 40a, 40b, the roller body 38 is cut 52 in the length direction, and the roller body 38 is integrated by being press-fitted into the large-diameter body 50 from the outside. obtain. The idle roller 86 is a roller body 88a corresponding to the diameter of the large-diameter body 50.

Next, the operation of storing and transporting the load 72 in the above embodiment will be described.

The imaginary line in FIG. 1 and the solid line in FIG. 2 switch the solenoid valve 91 to connect the supply hose 93 to the supply / discharge hose 90 and switch the rubber tube 45 by the pressure of air (fluid) supplied through the fluid supply / discharge passage 47. A state is shown in which the abutting portion 45d that is expanded and moves outward against the elastic portion 45c is abutted (pressed) against the inner surface 38a of the roller body 38.

At this time, the chain 66 is constantly driven by the motor 70, and thus the cylindrical member 35 is rotating around the roller shaft 31 via the sprocket 37 engaged with the chain 66. Further, since the rubber tube 45 that rotates integrally with the cylindrical member 35 is in contact with the inner surface 38a of the roller body 38, the roller body 38 is also forcibly rotated integrally. As a result, the pallet 73 on the transport path 71 supported between the drive roller device 30 and the idle roller 86 of both conveyors 10, 11 receives the transport force due to the forced rotation of the drive roller device 30 group. ,
It is transported on this transport path 71. At this time, the non-driven idle roller group 86 performs a follow-up rotation.

The rotation of the cylindrical member 35 as described above is performed smoothly and stably via the bearing device 34, and the rotation of the roller body 38 is also performed smoothly and stably via the bearing devices 39A and 39B. . Further, since the sealing device 48 also rotates integrally with the roller body 38, the shaft portion flow path which is the boundary between the rotating portion and the non-rotating portion
Air does not leak from between the space 47a and the annular flow path 47b.

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 45 is released, and the elasticity of the elastic portion 45c as shown by the solid line in FIG. 1 and the phantom line in FIG. The contact portion 45d moves inward by force, and is separated from the inner surface 38a of the roller body 38. Therefore, the roller body 38 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 73 (load 72) as described above.
Is controlled based on the detection and non-detection of the.

That is, when the pallet 73 is unloaded from the upstream end of the group H by the forklift truck 8 in a state where the transport path 71 is empty, the photoelectric switch 96 of the group H is detected but the photoelectric switch 96 of the group G is not detected. Therefore, the rubber tube 45 is brought into contact by the operation of the control unit 97 and the solenoid valve 91, and the roller bodies 38 of the groups H and G are forcibly rotated, thereby transporting the pallet 73 from the group H to the group G. .

When the pallet 73 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 45 of the groups G and F abut and move the pallet 73 to the group G. To group F. Pallets sequentially transported downstream in this way
73 stops in contact with the stopper 98 and is stored in the group A. When the optoelectronic switch 96 detects the pallet 73, the rubber tubes 45 of the group A move apart.

The second pallet 73 is conveyed in the same manner, and is stored in the group B while being in contact with the pallet 73 of the group A. At this time, the detection is performed in the group B, but since the group A is also performing the detection movement, the rubber tube 45 of the group B also moves away.

In such a work, for example, it is assumed that the pallets 73 are stored in all the groups A to H and all the rubber tubes 45 are moved apart. When the pallet 73 of the group A is taken out by the forklift truck 8 in this state, the photoelectric switch 96 of the group A is not detected.
The rubber tube 45 of the group B is brought into contact, and the pallet 73 of the group B is conveyed to the group A. Then, group B
Group B,
The rubber tube 45 of C moves to abut, and the pallet 73 of group C is conveyed to group B. By repeating such an operation, the pallet 73 can be sequentially fed.

In the above embodiment, the transport device 12 is constituted by the pair of left and right conveyors 10 and 11, but this is achieved by making the roller body 38 and the like longer so that only one of the conveyors 10 transports the transport device 12.
May be configured.

In the above embodiment, one of the conveyors 10 is entirely configured as the driving roller device 30, but it may be a conveyor type in which one or a plurality of idler rollers are arranged between the driving roller devices.

In the above embodiment, the transport device 12 including the conveyors 10 and 11 is used.
Is incorporated into the shelf frame 1, but this may be a floor conveyor type installed on the floor.

When performing high-speed conveyance with a large roller,
As shown in FIG. 7 and FIG. 7, the drive roller 30 in which the large-diameter main body 50 is externally fitted to the roller main body 38 and integrated therewith, has its roller shaft
The idle roller 86 having the large-diameter roller body 88a is incorporated into the conveyor frame 74 while being incorporated into the conveyor frame 14 via the intermediate frame 31. Thus, the pallet 73 can be conveyed through the large-diameter main body 50 that rotates together with the roller main body 38.

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. At that time, by incorporating the transmitting portion of the rotational force by the flexible body into the roller body, the whole can be reduced in volume and compact, and furthermore, since the flexible body is located between the bearing devices, the rotational force can be reduced. It is possible to prevent other objects from intervening in the transmission unit, and to always transmit the transmission properly, and furthermore, it is possible to always stably support the rotation of the roller body side by a pair of bearing devices.

When it is desired to use a large-diameter roller, a large-diameter main body having a desired diameter may be externally fitted to the roller main body and fixed. High-speed conveyance can be performed. At this time, the main parts such as the roller shaft, the cylindrical member, the bearing device, the flexible body, and the roller main body can be used as well, and economical diversion can be achieved by preparing only large-diameter main bodies of various diameters.

[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, FIG. 6 is a partially cutaway front view when the large-diameter main body is mounted, and FIG. 7 is a cutaway side view of the same part. 1 ... shelf frame, 10, 11 ... conveyor, 12 ... transport device, 14
…… Conveyor frame, 20,21 …… Notch, 30 …… Drive roller device, 31 …… Roller shaft, 34 …… Bearing device, 35…
... Cylinder member, 37 ... Sprocket (passive part), 38 ... Roller body, 38a ... Inner surface, 39A, 39B ... Bearing device, 40A, 40B
... annular case, 40a, 40b ... flange, 45 ... rubber tube (flexible body), 45c ... elastic part, 45d ... contact part, 47 ...
Fluid supply / discharge channel, 48 Sealing device, 50 Large-diameter body, 51
... Elastic contact part, 66 ... Chain, 71 ... Conveyance path, 72 ...
Load, 73 ... Pallet, 74 ... Conveyor frame, 86 ...
Idling rollers, 88, 88a: Roller body, 90: Supply / discharge hose, 91: Solenoid valve, 96: Opto-electronic switch, 97: Control unit.

Claims (1)

(57) [Claims] A roller shaft (31) detachably supported on a frame (14), a freely rotatable tubular member (35) externally fitted on the roller shaft (31), and a cylindrical member (35). ) And a roller body (38) which is fitted over the roller shaft (31) and is freely rotatable via bearing devices (39A, 39B);
A, 39B) and a flexible body (45) which is fitted to the cylindrical member (35) by external fitting and which can freely contact and separate from the inner surface (38a) of the roller body (38) by expansion and contraction; A fluid supply / discharge passage (47) that opens into the flexible body (45) through a roller shaft (31), and a passive portion (37) provided in the cylindrical member (35); A driving roller device comprising a large-diameter main body (50) that can be externally fitted and fixed with respect to (1).