JPH0423714A - Driving roller device - Google Patents

Abstract

PURPOSE:To miniaturize the roller and prevent foreign matters from advancing to a transmission portion at the above drive roller device for a shelf facility, by fitting a flexible body to a roller shaft put fixingly on with a roller main body, and expanding/contracting the flexible body, and arranging so that it may come into contact with and/or be separated from the inner surface of a passive motion body which links with a drive device that is put on the shaft idly and rotatably. CONSTITUTION:Air pressure is fed/discharged to a rubber tube 40 through a fluid feed/discharge passage 43 by means of the changeover of a solenoid valve which is not shown in the drawing, and the rubber tube 40 is expanded/ contracted. As a result, the tube 40 comes into contact with and/or is separated from the inner surface 36a of a passive motion body 36 (a sprocket), and the passive motion body 36 is connected/released with/from a roller shaft 31. Accordingly, the passive motion body 36 turning at all times by means of a drive device and a roller 37 are come into contact with and/or separated from each other, and the rotation stoppage of the roller 37 is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to, for example, a roller conveyor installed in a shelving rack 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 shaft 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 can be freely rotated together. 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. Then, by controlling supply and discharge to and from the cylinder device and moving the support shaft up and down, it is possible to switch between a drive mode in which the transmission roller is in contact with the reversing roller, and a non-drive mode in which the transmission roller is spaced N apart from the idle roller. The conveying force to the conveyed object! #cut,
Control is performed to prevent objects to be transported from colliding 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. Furthermore, oil, dust, etc. from the conveyed object side tend to be present between the reversing 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 comprises: a roller shaft rotatably supported by a frame; a roller main body externally fitted and fixed to the roller shaft; A passive part is fitted around the shaft so that it can freely rotate; a flexible body is attached to the roller shaft and can freely come into contact with and separate from the inner surface of the passive part by expanding and contracting; It consists of a fluid supply/discharge path that opens to.

Effects According to the configuration of the present invention described above, fluid is supplied into the visible body through the fluid supply/discharge path with rotational force applied to the passive part, and the visible body is moved by the pressure, thereby making the flexible body The roller body can be brought into contact with (pressure-contacted with) the inner surface of the driven part, and thus the roller body can be integrally rotated through the roller shaft to convey the object to be conveyed.

Further, when the pressure inside the flexible body is released through the fluid supply/drainage path, the flexible body contracts and separates from the inner surface of the driven portion, and rotational force is no longer transmitted and 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 an opening-shaped cross section. On the outer surface 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 at the bottom of one of the side plates 16 are Bolt holes 22 are formed for fixing guide rails (described later). Conveyor frame 1 formed in this way
4 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 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.

The drive roller device 30 has a roller shaft 31 supported at both ends by the bearings 20.21, so that the roller shaft 31
is rotatably supported on the conveyor frame 14 side. A sprocket 36, which is an example of a passive part, is rotatably fitted onto one outer end of the roller shaft 31 via a pair of left and right bearings 32,33. The roller shaft 3
The cylindrical roller main body 37 fitted onto the roller 1 has disks #34 and 35 at its left and right ends fixed to the roller shaft 31. Both bearings 32 and 33 supporting the sprocket 36
In between, a rubber tube 40, which is an example of a flexible body that can come into contact with and separate from the inner surface 36a of the sprocket 36 by expansion and contraction, is fitted onto the roller shaft 31, and this rubber tube 40 is fitted with a pair of bands. It is fixed to the roller shaft 31 via 41 and 42. The rubber tube 40 is
A pair of left and right cylindrical portions 40a on which bands 41 and 42 act;
Flange portions 40 are continuously provided outward from the inner ends of these cylindrical portions 40a.
b, and a contact portion 40d that is connected between the outer ends of the collar portions 40b via an elastic portion 40c, and the elastic portion 40
c is for elastically biasing the contact portion 40d to separate it from the inner surface 36a. Note that the rubber tube 40 has a contact portion 40
It is made of a material that exhibits a large frictional force at point d. The fluid supply/discharge path 43 that opens from the roller shaft 31 into the rubber tube 40 is formed from one end to the middle on the axis of the roller shaft 31, and includes a shaft flow path 43a that is open in the radial direction; In order to communicate with one end of the shaft passage 43a,
It is formed from a piping channel 43b formed in a rotary joint 44 attached to one end of the roller shaft 31.

A guide rail 50 is disposed over the entire length at one corner of the bottom of the conveyor frame 14, and this kite 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 slidably fitted into the dovetail groove 51, and the bolt 5 is inserted into 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 operatively connects the driving tin rocket 57 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 an opening-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 members 4 and 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, a supply/discharge hose 90 connected in series with the piping channel 43b is provided, and these supply/discharge hoses 9
0 through the solenoid valves 91, respectively, to the supply device ? l! 92
It can be freely connected to and disconnected from the common supply hose 93. 94 indicates a regulator, 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, for two groups adjacent in the transport direction, when the optoelectronic switch 96 of the upstream group is in the detecting state and the optoelectronic switch 96 of the downstream group is not in the detecting state, the rubber tubes 40 of both groups are in contact with each other at the same time. (Supply hose 93
and the supply/discharge hose 90). When the photoelectronic switches 96 of both groups are in the detection operation or non-detection at the same time, the rubber tubes 40 of both groups
are configured to simultaneously move apart (to cut off the supply hose 93 and the supply/discharge hose 90). For this purpose, each solenoid valve 91 is integrated into a respective control unit 97. Also, only the most downstream group A has its optoelectronic switch 96
The rubber tube 40 is oval-shaped so that it moves away when detected movement. 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 Figure 1 and the solid line in Figure 2 indicate that the solenoid valve 91 is switched to connect the supply hose 93 to the supply/discharge hose 90, and the pressure of the air (fluid) supplied through the fluid supply/discharge path 43 is applied to the rubber tube. 40 and moves the contact portion 40d outward against the elastic portion 40c to the inner surface 3 of the sprocket 36.
It shows a state in which it is brought into contact (pressure contact) with 6a. At this time, the chenno 56 is constantly driven by the motor 60, and therefore the sprocket 3 engaged with the chenno 56
6 is rotating. Furthermore, since the roller shaft 31 and the one-piece rubber tube 40 are in contact with the inner surface 36a of the sprocket 36, the roller body 37
It is also forced to rotate integrally. As a result, the pallet 63 on the conveyance path 61 supported between the drive roller device 230 and the idle roller 80 of both conveyors 10.11 is
The paper is conveyed on this conveyance path 61 while being subjected to conveyance force due to the forced rotation of the drive roller device 30 group.

At this time, the group of idle rollers 80 that is not driven 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 36a of the sprocket 36. Therefore, the roller main body 37 is not forcibly rotated, and the conveyance is stopped.

The conveyance device 12 consisting of a pair of conveyors 10 and 11 basically conveys the pallet 48 (J47) as described above, but in reality, the optoelectronic switch 96 detects and non-detects 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 contacts the roller body 37 of groups H and G, and the roller bodies 37 of groups H and G are forcibly rotated, thereby transporting the pallet 63 from group H to 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. and then transported to Group F. 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. The second pallet 63 is also transported in the same manner, and is stored in group B by coming into contact with the pallets 63 of group A. At this time, group B is detected and moved, but since group A is also detected, the rubber tubes 40 of group B are also moved apart. In such work, for example, pallets 63 are stored in all groups A to H, and all rubber tubes 40 are
Suppose you move it apart. In this state, forklift truck 8
When the pallet 63 of group A is taken out, the optoelectronic switch 96 of group A is not detected, so the rubber tubes 40 of groups A and B come into contact, and the pallet 63 of group B is transferred to group A. transport. 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.
Therefore, the pallet 63 of group C is transported to group B. By repeating this action, the pallet 63
You can forward sequentially.

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.

Further, in the embodiment described above, one conveyor 10 is constructed entirely as a driving roller device N30, 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 conveyor f consists of a conveyor 10.11.
12 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/drainage path, and the flexible body is expanded and contracted to come into contact with or challenge the inner surface of the passive part. The roller body can be forcibly rotated to transport the object, or the forced rotation can be canceled to stop the transport of the object. In this way, by incorporating the flexible body that discards the transmission of rotational force into the passive part, the whole can be made low and compact, and furthermore, it is possible to prevent other objects from intervening in the transmission part of rotational force. and the communication can always be done well.

[Brief explanation of drawings]

The drawings show one 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 tin shelving, and Fig. 4 is the same side view. FIG. 5 is a schematic side view showing the state of use. 1...Shelf frame, 10.11...Conveyor, 12...
Conveying device, 14... - Conveyor frame, 20.21.
... Notch, 30... Drive roller device, 31...
Roller shaft, 32. 33... Cap, 34... Bush, 35... Cylindrical member, 36... Sprocket (passive part), 36a... Inner surface, 37... Roller body,
40...Rubber tube (flexible body), 40c...Elastic part, 40d...Abutting part, 43...Fluid supply/discharge path, 5
6... Cheno, 61... Transport route, 62... Load,
63...Pallet, 64...Conveyor frame, 8
0... Idle roller, 90... Supply/discharge hose, 91...
- Solenoid valve, 96... photoelectronic switch, 97... control unit. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A roller shaft rotatably supported by a frame, a roller body fitted onto and fixed to the roller shaft, a passive part fitted onto the roller shaft so as to be freely rotatable, and a roller shaft attached to the roller shaft; A driving roller device comprising: a flexible body that can freely come into contact with and separate from the inner surface of the driven portion by expansion and contraction; and a fluid supply/discharge path that opens into the flexible body through the roller shaft.