JPH043706A - Driving roller device - Google Patents

Abstract

PURPOSE:To miniaturize the device, and to prevent the intrusion of foreign matter, in a driving roller device for a roller conveyor, by providing a roller shaft on which a roller body is loosely fitted, with both a flexible body that can be brought into contact with or can be separated from the inner surface of the roller body by expansion or contraction and a sprocket interlocked with a driving chain. CONSTITUTION:By the changeover operation of a solenoid valve, connection and disconnection of a supply/discharge hose 90 and a fluid supply hose is carried out. And by the connection, a fluid is supplied to a rubber tube 40 via a fluid supply/discharge passage 43 to expand the rubber tube 40, so that it can be abutted on the inner surface 37a of a roller body 37. Thereby the driving force of a chain 56 is transmitted to the roller body 37 via a sprocket 36, a roller shaft 31, and the rubber tube 40, so that the roller can be driven. On the other hand, if the fluid is discharged, the roller is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to, for example, a roller conveyor incorporated in shelving equipment or installed on a floor. This invention relates to a drive roller device used in roller conveyors and the like.

2. Description of the Related Art Conventionally, as a roller conveyor using a driving roller device, a structure as shown in, for example, Japanese Unexamined Utility Model Publication No. 1-121008 has been provided. In this conventional structure, a large number of rollers are provided on the main body frame so as to freely rotate to form a conveyance path, and a support frame is provided on the main body frame side. This support frame is provided with a support shaft along the roller axis, and on this support shaft, a transmission roller that can freely come into contact with the lower part of the outer periphery of an adjacent idle roller and a passive sprocket are integrally rotated. At the same time, a chino supported and guided on the support frame side is engaged with the sprocket. A cylinder device for moving the support shaft up and down is provided between the support frame and the support shaft.

According to this conventional method, a transmission roller is rotated by a chino via a sprocket, and the rotation of this transmission roller is
The information is transmitted to the idle rollers that are in contact with each other, and the conveyed object is conveyed on the conveyance path by the rotation of the idle roller group. And cylinder equipment! By controlling the supply and discharge of The conveyance force is wasted on the conveyed objects, and the conveyed objects are controlled so that they do not collide with each other.

Problems to be Solved by the Invention According to the above-mentioned conventional type, the transmission roller and the like are disposed below the idling roller, making the entire device bulky and large. Further, oil and dust on the side of the conveyed object are likely to be interposed between the idle roller and the transmission roller, which adversely affects the 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 made compact as a whole and that does not involve any other object in the rotational force transmission section.

Means for Solving the Problems In order to achieve the above object, the drive roller device of the present invention includes: a roller shaft rotatably supported by a frame; a roller body fitted around the roller shaft and freely rotatable; a flexible body attached to the roller shaft and capable of coming into contact with and separating from the inner surface of the roller main body by expansion and contraction; a fluid supply/discharge path opening into the flexible body through the roller shaft; It consists of an attached passive part.

Effects According to the configuration of the present invention described above, the roller shaft and the flexible body can be rotated integrally by applying a rotational force to the passive part. In this state, by supplying fluid into the flexible body through the fluid supply/discharge path and expanding the flexible body with the pressure, this flexible body can be brought into contact (pressure contact) with the inner surface of the roller body, and thus The roller body can be rotated integrally to transport objects. Further, when the pressure inside the flexible body is released through the fluid supply/discharge path, the flexible body contracts and separates from the inner surface of the roller body, and rotational force is no longer transmitted, so that the rotation of the roller body is stopped.

EXAMPLE Below, an example of the present invention in which a drive roller device is incorporated into a shelving facility will be described based on the drawings.

In FIGS. 3 and 4, 1 is a shelf frame, which includes a plurality of left and right front struts 2, a plurality of right and left rear struts 3, a front cross member 4 connecting the front struts 2, and a rear strut 3. Rear cross member 5 connecting
It is composed of a front and rear member 6 that connects the front strut 2 and the rear strut 3, and the like. Supports 2 and 3 of this shelf frame 1 and each material 4 to 6
A pair of left and right conveyors 10.
A conveying device 12 is arranged horizontally with its conveying direction 13 as the depth direction. That is, Figures 1 to 3
As shown in the figure, the conveyor frame 14 of one conveyor 10 includes a pair of left and right side plates 15 and 16, and side plates 1
5. A top plate 17°18 bent outward from the top end of 16;
The bottom plate 19 connects the lower ends of the side plates 15 and 16 to form a U-shaped cross section. On the outer surfaces of the side plates 15 and 16, a plurality of bearings 20 and 21 for supporting a drive roller device (described later) are provided at predetermined pitches in the length direction, and a guide is provided at the bottom of one of the side plates 16. Bolt holes 22 are formed for fixing rails (described later). Conveyor frame 1 formed in this way
4 is detachably fixed to the shelf frame l. For this purpose, a bolt hole 23 is formed in the bottom plate 19, and a nut 24 matching the bolt hole 23 is fixed on the bottom plate 19 in the conveyor frame 14 and in a through hole 25 formed in the crosspiece 4.5. A bolt 26 passed from below can be fitted into the nut 24 through the bolt hole 23.

Drive roller family! 30, both ends of the roller shaft 31 are supported by the bearings 20.21, so that the roller shaft 31
is rotatably supported on the conveyor frame 14 side. A cylindrical member 35 is externally fitted and fixed to the intermediate portion of the roller shaft 31, and a sprocket 36, which is an example of a passive portion, is integrally provided at one outer end of the roller shaft 31.

The cylindrical roller body 37 fitted onto the roller shaft 31 is
Between the bearings 38 and 39 provided between the roller shaft 31 and the bearings 38 and 39, which can freely rotate, the cylindrical member 35 expands and contracts and abuts against the inner surface 37a of the roller body 37. I# A rubber tube 40, which is an example of a flexible body that can be freely separated, is fitted onto the outside, and this rubber tube 40 is connected to the cylindrical member 3 via a pair of bands 41 and 42.
It is fixed at 5. The rubber tube 40 in a is attached to the band 41.
．． A pair of left and right cylindrical portions 40a on which 42 acts, a flange portion 40b that is connected outwardly from the inner end of these cylindrical portions 40a, and an elastic portion 40c that is connected between the outer ends of these flange portions 40b. The elastic portion 40c elastically biases the contact portion 40ci away from the inner surface 37a.

Note that the rubber tube 40 is made of a material that produces a large frictional force at the contact portion 40d. The roller shaft 3
1 through the WJ member 35, and then the rubber tube 4.
The fluid supply/discharge passage 43 that opens inside the roller shaft 31 is formed from one end to the middle of the roller shaft 31, and has a cylindrical shape so that the fine passage 43a opens in the radial direction and the fine passage 43a always communicates with the fine passage 43a. An annular channel 43b formed on the inner surface of the member 35
and a cylindrical passage 43c formed in the cylindrical member 35 to communicate the annular passage 43b into the rubber tube 40. Note that a rotary joint 44 is provided at one end of the roller shaft 31.

A guide rail 50 is disposed along the entire length at one corner of the bottom of the conveyor frame 14, and this guide rail 50 has a dovetail groove portion 51 on the outside and a pair of upper and lower guide portions 52, 53 on the inside. has.

A plate-shaped nut body 54 is movably inserted into the dovetail groove 51, and the bolt 5 passed through the bolt hole 22 from the outside.
5 to the nut body 54 and tightening, the guide rail 50 can be fixed to the conveyor frame 14.

The chino 56, which is an example of a driving body, is connected to the sprocket 3.
The upper guide part 5 has an upper path that constantly engages with 6 from below.
2, the lower path is supported and guided by the lower guide portion 53. As shown in FIG. 5, the chino 56 is stretched between a driving sprocket 57 and a driven sprocket 58 via a guide sprocket 59, etc., and the driving sprocket 57 is operatively connected to a motor 60. Reference numeral 61 indicates a conveyance route, and reference numeral 62 indicates 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 has a pair of left and right side plates 65.6.
6, upper plates 67 and 68 bent outward from the upper ends of both side plates 65 and 66, and a bottom plate 69 connecting the lower ends of both side plates 65 and 66 to form a U-shaped cross section.

On the outer surface of the side plates 65, 66, a plurality of bearings 70, 71 for supporting idle rollers (described later) are provided at predetermined pitches in the length direction. A bolt hole 72 is formed in the bottom plate 69, and a nut 73 that matches the bolt hole 72 is fixed on the bottom plate 69, and the bolt 7 is passed from below through a through hole 74 formed in the cross member 4.5.
5 is fitted with a nut 73 through a bolt hole 72, thereby making the conveyor frame 64 detachable from the shelf frame 1.

Both ends of the roller shaft 81 of the idle roller 80 are supported by the bearings 70, 71, and thus the roller shaft 81 is rotatably supported on the conveyor frame 64 side.

As described above, the conveying device 12 consisting of a pair of conveyors 10.11 is arranged in a plurality of groups in the conveying direction 13, each group consisting of six (plural) rollers 37 in a predetermined arrangement, as shown in FIG. 5, for example. , in the example, 8 groups A
, B, C, D, E, F, G, and H, and the rubber tubes 40 can be freely brought into contact with and separated from each other for each group A to H. That is, for each group, supply/discharge hoses 90 are provided in series with the piping channel 43d, and these supply/discharge hoses 9
0 can be connected to and disconnected from a common supply hose 93 from a supply device 92 via electromagnetic valves 91, respectively.

Reference numeral 94 indicates a regulator, and reference numeral 95 indicates a silencer.On the downstream side of each group A to H, a photoelectronic switch 96, which is an example of a stock detector, is provided. Here, in two groups adjacent in the conveyance direction, when the photoelectronic switch 96 of the upstream group is detected and the photoelectronic switch 9θ of the downstream group is not detected, the rubber tubes 40 of both groups are brought into contact at the same time. (Communication between the supply hose 93 and the supply/discharge hose 90). When the photoelectronic switches 96 of both groups are simultaneously before detection or non-detection at the same time, the rubber tubes 40 of both groups simultaneously move apart (the supply hose 93 and the supply/discharge hose 90 are cut off).
It is configured as much as possible. For this purpose, each '@ solenoid valve 1 is incorporated into its own control unit 97. Further, only the most downstream group A is configured so that the rubber tube 4o does not move away when the optoelectronic switch 96 detects the detection. 98 indicates a stopper.

Next, the storage and conveyance work of the load 62 in the above embodiment will be explained.

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 moved by the pressure of the air (fluid) supplied through the fluid supply/discharge path 43. The contact portion 40d, which is expanded and moves outward against the elastic portion 40c, is connected to the inner surface 37 of the roller body 37.
It shows the state in which it is pressed into contact with a. At this time, the chino 56 is constantly driven by the motor 60,
Therefore, the sprocket 36 engaged with the chino 56
The roller shaft 31 is rotating via the. Furthermore, the cylinder member 3
Since the rubber tube 40, which rotates integrally with the roller shaft 31 via the rubber tube 40, 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 pallets 63 on the conveyance path 61 supported between the drive roller devices 30 and the idle rollers 80 of both conveyors 10.11 are subjected to the conveyance force due to the forced rotation of the drive roller device 30 group. , will be transported on this transport path 61. At this time, the non-driven idle roller 80 group performs follow-up rotation.

Furthermore, when the solenoid valve 91 is switched to cut off the supply/discharge hose 90 from the supply hose 93, the pressure inside the rubber tube 40 is released, and as shown by the solid line in FIG. 1 and the phantom line in FIG. The contact portion 40d moves inward (shrinks) due to the force and is separated from the inner surface 37a of the roller body 37. Therefore, roller book #37 is not forcibly rotated and conveyance is stopped.

The conveying device 12 consisting of a pair of conveyors 10 and 11 basically conveys the pallet 48 (load 47) as described above, but in reality, the optoelectronic switch 96 detects and does not detect the pallet 63. Conveyance control is performed based on this. In other words, when the transport path 61 is empty, when the pallet 63 is unloaded onto the upstream end group H by the forklift truck 8, the photoelectronic switch 96 of group H is detected, but the photoelectronic switch 96 of group G is not detected. Therefore, by the operation of the control unit 97 and the solenoid valve 91, the rubber tube 40 comes into contact with the roller book #37 of groups H and G, and the pallet 63 is transferred from group H to group G. transport. When pallet 63 enters group G, this group
The photoelectronic switch 96 detects the group F, but the rubber tube 40 of the groups G and F does not detect the group F.
is in contact with the pallet 63 from group G to group F.
transport to. The pallets 63 thus conveyed sequentially to the downstream side come into contact with the stopper 98, stop, and are stored in group A.

When this pallet 63 is detected by the photoelectronic switch 96, the rubber tubes 40 of group A are moved away. 2111!The first pallet 63 is conveyed in the same manner, comes into contact with the pallet 63 of group A, and is stored in group B. At this time, the detection movement is performed in group B, but since group A is also detected, the rubber tube 40 of this group B is also subjected to the M opening movement. In this kind of work, for example, all group A
It is assumed that the pallet 63 is stored at ~H and all the rubber tubes 40 are moved apart. When the pallet 63 of group A is taken out by the forklift truck 8 in this state,
Since the photoelectronic switch 96 of group A is not detected, the rubber tubes 40 of groups A and B come into contact with each other, thereby transporting the pallet 63 of group B to group A. Then, since the photoelectronic switch 96 of group B is not detected, the rubber tubes 40 of groups B and C come into contact with each other, thereby transporting the pallet 63 of group C to group B. By repeating such actions, the pallets 63 can be sequentially fed.

In the above embodiment, the passive part is formed by the sprocket 36 and is driven by the chino 56, but this is also possible by using a round belt, a combination of a drive shaft and a trapezoidal roller, or a drive shaft and bevel gear. It may also be a combination of the following.

Further, in the above embodiment, the conveying device 12 is constituted by a pair of left and right conveyors 10.11, but this is a roller body 3.
7 or the like, the conveying device 12 may be configured with only one conveyor 10.

Furthermore, in the embodiment described above, one conveyor 10 is configured entirely as a driving roller device 30, but this may be a conveyor in which one or more idle rollers are arranged between the driving roller devices.

In the above embodiment, the conveying device 1 consists of a conveyor 10.11.
2 is incorporated into the shelf frame 1, but this may also be a floor conveyor type installed on the floor.

Effects of the Invention According to the present invention having the above configuration, the inside of the flexible body is pressurized or released through the fluid supply/discharge path, and the flexible body is expanded and contracted to be brought into contact with or separated from the inner surface of the roller body. This roller body can be forcibly rotated to transport objects.
Alternatively, the conveyance of the object can be stopped by canceling the forced rotation.

In this way, by incorporating the flexible body that discards the transmission of rotational force into the roller body, the whole can be made low and compact, and moreover, it is possible to prevent other objects from intervening in the transmission part of rotational force. It can be prevented and its transmission can always be carried out successfully. Furthermore, by attaching the passive part directly to the roller shaft, manufacturing can be facilitated and the weight can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a partially cutaway side view, Fig. 3 is a front view of the shelving equipment, and Fig. 4 is a side view of the same. , 5th Uj! U is a schematic side view showing a state of use. 1...Shelf frame, 10.11...Conveyor, 12...
Conveying device, 14... Conveyor frame, 20.21.
... Bearing, 30... Drive roller device, 31... Roller shaft, 35... Cylindrical member, 36... Sprocket (passive part), 37... Roller body, 37a... Inner surface, 4
0... Rubber tube (flexible body), 43... Fluid supply/discharge path, 56... Cheno, 61... Transport path, 62...
- Load, 63... Pallet, 64... Conveyor frame, 80... Idle roller, 90... Supply/discharge hose, 9
1... Solenoid valve, 96... Photoelectronic switch, 97...
·Controller unit. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A roller shaft that is rotatably supported by a frame, a roller body that is fitted onto the roller shaft and can freely rotate, and a roller that is attached to the roller shaft and comes into contact with the inner surface of the roller body when expanded and contracted. 1. A drive roller device comprising: a flexible body that can be moved toward and away from the roller; a fluid supply/discharge path that opens into the flexible body through the roller shaft; and a passive part attached to the roller shaft.