JPH0445005A - Drive roller device - Google Patents

Abstract

PURPOSE:To make the whole device compact and conduct a stable rotation support and prevent the leak of an operation fluid, by making a constitution which consists of a roller shaft, a pipe member, a roller main body, a flexible body fitted to the pipe member, a fluid feed/discharge passage and a sealing device interposed between the roller shaft and the pipe member. CONSTITUTION:A flexible body 45 is integrally rotated through a pipe member 35 when the force of rotation is given to a motion receiving portion 37. A fluid is fed to the inside of the body 45 through a fluid feed/discharge passage under this condition, and the body 45 is bulged by means of its pressure, then the body 45 is butted against the inner surface of a roller main body 38, and the transport of a transported matter is conducted by rotating the body 38 integrally. Also, when the pressure of the inside of the body 45 is released through the passage 4, 7, the body 45 is contracted, and separated from the inner surface of the body 38, and the rotation of the body 38 is stopped. And the whole strength is increased by interposing the member 55 and a bearing device 39B, and transport and transport stop are stably conducted. In addition, the leak of the fluid from the passage 47 at the border between the rotary portion and the non-rotary portion is prevented by means of a sealing device 48.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drive roller device used for, for example, a roller conveyor incorporated in shelving equipment or a roller conveyor installed on the floor.

Conventional technology Conventionally, the drive roller family! As a roller conveyor using a roller conveyor, for example, a structure as seen in Japanese Patent Application Laid-Open No. 160807/1983 has been proposed. In this conventional structure, a large number of rollers are provided on the main body frame (parallel rails) so as to freely rotate to form a conveyance path, and a case is provided on the main body frame side via a support bracket or the like. This case is provided with a pin that closely follows the rollers, and on this pin, a wheel and a passive sprocket are provided so as to be able to freely rotate together, and which can freely abut against the lower part of the outer periphery of a pair of adjacent rollers at the same time. A driving 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 method, a wheel is rotated by a driving chino via a tin rocket, and the rotation of this wheel is transmitted to a pair of rollers that are in contact with each other, so that the conveyed object is moved by the rotation of the roller group. Convey it on the conveyance route. Then, by controlling supply and discharge to and from the diaphragm and moving the bin up and down, it is possible to switch 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 conveying the object to the conveyed object. It cuts and cuts the force to prevent objects being transported from colliding with each other.

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 entire structure becomes bulky and large. Furthermore, oil, dust, and the like from the conveyed object side tend to be present between the roller and the wheel, which adversely affects the transmission of rotational force due to contact.

It is an object of the present invention to provide a drive roller device that can be compactly assembled as a whole, does not involve any other objects in the rotational force transmission section, can provide stable rotational support, and does not leak working fluid. It is in the point of providing.

Means for Solving the Problems In order to achieve the above object, the drive roller device of the present invention includes a roller shaft supported by a frame, a roller shaft fitted on the outside of the roller shaft via a bearing device so as to freely rotate, and a roller shaft supported on a frame. A cylindrical member with a passive part at the end, a roller shaft that is fitted externally from this cylindrical member, and a bearing! a flexible body that is attached to the cylindrical member and can freely come into contact with and separate from the inner surface of the roller body through expansion and contraction; It consists of a fluid supply/discharge path opening into the visible body through the fluid supply/discharge path, and a sealing device interposed between the roller shaft and the cylindrical member to form a part of the fluid supply/discharge path.

Effects According to the configuration of the present invention described above, by applying a rotational force to the passive part, the flexible body can be rotated integrally via the cylindrical member. In this state, by supplying fluid into the flexible body through the fluid supply/discharge path and inflating the flexible body with the pressure,
This is possible! One member can be brought into contact (pressure #) with the inner surface of the roller body, so that the roller body can be rotated integrally to convey the object to be conveyed.

Furthermore, when the pressure inside the visible body is released through the fluid supply/discharge path, the visible body contracts and separates from the inner surface of the roller body.
Since no rotational force is transmitted, the rotation of the roller body is stopped. By interposing the cylindrical member and the bearing assembly, the overall strength can be increased, and transportation and transportation can be stably carried out. Even more stickers! This can prevent fluid from leaking from the fluid supply/discharge path at the boundary between the rotating part and the non-rotating part.

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. 4 and 5, 1 is a shelf frame, which includes a plurality of left and right front columns 2, a plurality of left and right rear columns 3, a front cross member 4 that connects the front columns 2, and a rear column 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 4
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
It is formed into a U-shaped cross section by an upper plate 1718 bent outward from the upper end of 5.16 and a bottom plate 19 connecting the lower ends of both side plates 15.16. From the upper part of the side plate 1516 to the upper plate 17.18, a plurality of notches 20° 21 for 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 the lower part of the guide rail. The conveyor frame 14 formed in this manner 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. Bolt 2 passed from below
6 can be freely fitted to a nut 24 through a bolt hole 23.

In the driving roller device 30, parallel parts 3ta are formed at both ends of the roller shaft 31, and by dropping these parallel parts 31a into the notches 20.21 from above, the roller shaft 31
is supported non-rotatably on the conveyor frame 14 side. A cap 32 made of hard rubber is fitted onto one end of the roller shaft 31, and a snap bottle 33 is attached to the other end. A cylindrical member 35 is fitted around the roller shaft 31 via a bearing device 34 so as to be freely rotatable. Here, the bearing device 34 is formed by a pair of needle bearings 34A, 34B, etc. in the roller axial direction.

The cylindrical member 35 has a bearing wave! It consists of an outer cylinder part 35A supported by the outer cylinder part 34, and an inner cylinder part 35B which is partially fitted onto the outer cylinder part 35A and integrated with the bolt 36. A sprocket 37, which is an example of a passive part, is integrally provided at one outer end of the outer cylinder part 35A.

The cylindrical roller main body 38, which is externally fitted from the outer cylindrical portion 35A to the other side of the roller shaft 31, has a pair of bearing waves fi3.
It is freely rotatably supported by 9A and 39B. Here, the bearing devices 39A, 39B include annular cases 40A, 40B that are fitted and fixed to both ends of the roller body 38, and outer rings 41A, 41 disposed on the inner peripheral sides of these annular cages 40A, 40B.
It is composed of a large number of balls 43A, 43B, etc., arranged via B and side plates 42A, 42B. Then, one group of balls 43A is brought into contact with the outer circumferential surface of the outer (j1f!!! Between the two bearing devices 39A and 39B that are in contact with each other, a rubber tube 45, which is an example of a visible body that can freely come into contact with and separate from the inner surface 38a of the roller main body 38 by expansion and contraction, is externally attached to the inner cylinder portion 35B. This rubber tube 45 is inserted into the inner one through a pair of bands 46A and 46B.
It is fixed to the mff1 section 35B. The rubber tube 45
A pair of left and right cylindrical parts 45a on which the bands 46A and 46B act, a flange 45b connected outwardly from the inner ends of these cylindrical parts 45a, and an elastic part 4 between the outer ends of these flange parts 45b.
5c, and the elastic g45C elastically urges the abutting part 45d away from the inner surface 38a. Note that the rubber tube 45 is
The contact portion 45d is made of a material that produces a large frictional force. From the roller shaft 31 to the inner cylinder portion 35B
The fluid supply/discharge path 47 that opens into the rubber tube 45 through the shaft is formed halfway from one end to the middle of the roller shaft 31 and has a shaft flow path 47a that is open in the radial direction, and this shaft flow path. 47a is formed between the outer surface of the roller shaft 31 and the inner surface of the inner cylindrical member 35B so that the annular flow path 4 always communicates with the annular flow path 4.
7b, and a cylindrical passage 47c formed in the inner cylindrical part 35B to communicate the annular passage 47b with the inside of the rubber tube 45.
A piping flow path 47d is formed in one cap 32 to communicate with one end of the shaft flow path 47a. A sealing device 48 is interposed between the roller shaft 31 and the inner cylindrical portion 35B to form an annular flow path 47b that is a part of the fluid supply/discharge path 47 inside. This sealing device 48 is
An annular plate 49 made of metal, annular sections 50A and 50B made of metal fixed to both ends of the annular plate 49, and annular sections 50A and 50A.

It is fixed to the outer surface of 50B, and the inner road end is the annular plate 4.
9, and springs 52A, 52B arranged annularly on the inner surface of the roadside. Then, the outer surfaces of the packing materials 51A and 51B are brought into contact with and fixed to the inner surface of the inner cylindrical portion 35B, and the free ends are attached to the outer surface of the roller shaft 31 by the spring 52A.
, 52B. Note that a through hole 53 is formed in the annular plate 49 to communicate the annular flow path 47b and the cylindrical flow path 47c.

A guide rail 60 is disposed over the entire length at one corner of the bottom of the conveyor frame 14, and this guide rail 60 has a dovetail groove portion 61 on the outside and a pair of upper and lower guide portions 62, 63 on the inside. has.

A plate-shaped nut body 64 is slidably fitted into the dovetail groove 61, and the bolt 6 passed through the bolt hole 22 from the outside.
5 to the nut body 64 and tightening, the guide rail 60 can be fixed to the conveyor frame 14.

The chino 66, which is an example of a driving body, is connected to the sprocket 3.
The upper guide portion 6 has an upper path that constantly engages with the upper guide portion 6 from below.
2, the lower path is supported and guided by the lower guide portion 63. As shown in FIG. 5, the chino 66 is stretched between a driving sprocket 67 and a driven sprocket 68 via a guide sprocket 69, etc., and the driving sprocket 67 is operatively connected to a motor 70. Reference numeral 71 indicates a conveyance route, and reference numeral 72 indicates 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 has a pair of left and right side plates 75.7.
6, 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 to form a U-shaped cross section.

A plurality of notches 80, 81 for attaching idle rollers (described later) are formed at predetermined pitches in the length direction from the upper part of the side plates 75, 76 to the upper plates 77, 78. A bolt hole 82 is formed in the bottom plate 79, and a nut 83 that fits the bolt hole 82 is fixed on the bottom plate 79, and a bolt 85 is inserted from below into a through hole 84 formed in the cross members 4, 5. By engaging nuts 83 through bolt holes 82, the conveyor frame 74 can be attached to and detached from the shelf frame 1.

The idle roller 86 has a roller shaft 87 and a roller shaft 87.
A roller body 88 is fitted onto the outside of the roller via a bearing or the like so that it can freely rotate.
parallel parts 8 formed at both ends of the roller shaft 87.
By dropping the roller shaft 7a into the notch 80.81 from above, the roller shaft 87 is supported in a non-rotating manner on the conveyor frame 74 side. 89 indicates Snavpubin.

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 in a predetermined arrangement, as shown in FIG. 6, for example. In the real example, there are 8 groups A and B.
, C, D, E, F, G, H are arranged, and each group A~
The rubber tube 45 can be freely brought into contact with and separated from the rubber tube 45 for each H.

That is, each group is provided with a supply/discharge hose 90 connected in series with the piping channel 47d, and these supply/discharge hoses 90 are connected to a common supply hose 93 from a supply device 92 via a solenoid valve 91. It can be shut off at will. 94
95 is a regulator, and 95 is 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 photoelectronic switch 96 of the upstream group is detected and the photoelectronic switch 96 of the downstream group is not detected, the rubber tubes 45 of both groups are simultaneously The hose 93 and the supply/discharge hose 90 are configured to communicate with each other. When the photoelectronic switches 96 in both groups are simultaneously in the detecting state or in the non-detecting state at the same time, the rubber tubes 45 in both groups are configured to simultaneously move away and 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. Further, only the most downstream group A is configured so that the rubber tube 45 moves away when the opto-electronic switch 96 is detected. 98 indicates a stopper.

Next, the storage and conveyance operations of the load 72 in the above embodiment will be explained.

The imaginary line in FIG. 1 and the solid line in FIG. 3 indicate that the solenoid valve 91 is switched to connect the supply hose 93 to the supply/discharge hose 90, and the rubber tube 45 is moved by the pressure of air (fluid) supplied through the fluid supply/discharge path 47. The contact portion 45d that expands and moves outward against the elastic portion 45c is connected to the inner surface 38 of the roller body 38.
It shows a state in which it is brought into contact (pressure contact) with a. At this time, the chino 66 is constantly driven by the motor 70,
Therefore, the sprocket 37 engaged with the chino 66
The cylindrical member 35 rotates around the roller shaft 31 via the roller shaft 31 . Furthermore, the rubber tube 4 rotates integrally with the cylindrical member 35.
5 is in contact with the inner surface 38a of the roller body 38, so that the roller body 38 is also forcibly rotated integrally. As a result, the pallets 73 on the conveyance path 71 supported between the drive roller devices 30 and idle rollers 86 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 71. At this time, the non-driven idle roller 86 group performs follow-up rotation.

The rotation of the cylinder 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, the sealing device 48 is also attached to the roller body 38.
and the packing materials 51A and 51B.
The free end of the roller comes into sliding contact with the top of the roller shaft 31. At this time, the packing materials 51A and 51B are pressed together by the elastic force of the springs 52A and 52B, so that the shaft flow path which is the boundary between the rotating part and the non-rotating part Air does not leak from between 47a and annular flow path 47b.

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 45 is released, and as shown by the solid line in FIG. 1 and the phantom line in FIG. The contact portion 45d moves inward due to the force and is separated from the inner surface 38a of the roller body 38. Therefore, the roller main body 38 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 73 (load 72) as described above, but in reality, the optoelectronic switch 96 detects and does not detect the pallet 73. Conveyance control is performed based on this. That is, when the conveyance path 71 is empty, when the pallet 73 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 45 comes into contact and the roller bodies 38 of groups H and G are forcibly rotated, thereby moving the pallet 73 from group H to group G. transport.

If Bare, 73 enters Group G, this Group G
Since the photoelectronic switch 96 detects but does not detect group F, the rubber tubes 4 of groups G and F
5 is in contact with the pallet 73 and conveys the pallet 73 from group G to group F. The pallets 73 thus conveyed sequentially to the downstream side come into contact with the stopper 98 and are stopped, and are stored in group A.

When this pallet 73 is detected by the photoelectronic switch 96, the rubber tubes 45 of group A are moved away. The second pallet 73 is conveyed in the same way, and comes into contact with the pallet 73 of group A and is transferred to group B.
will be stored in At this time, group B is detected and moved, but since group A is also detected and moved, the rubber tube 45 of group B is also moved away.

In such an operation, it is assumed that, for example, the pallets 73 are stored in all groups A to H, and all the rubber tubes 45 are moved apart. When the pallet 73 of group A is taken out by the forklift vehicle 8 in this state, since the photoelectronic switch 96 of group A is not detected, the rubber tubes 45 of groups A and B come into contact, and the pallet of group B is thus 73 to Group A. Then, since the photoelectronic switch 96 of group B is not detected, the rubber tubes 45 of groups B and C come into contact with each other, thereby transporting the pallet 73 of group C to group B. By repeating such actions, the pallets 73 can be sequentially fed.

In the above embodiment, the conveying device 12 is composed of a pair of left and right conveyors 10.11, but by making the roller body 38 etc. longer, the conveying device 12 can be composed of only one conveyor 10. good.

Furthermore, in the above embodiment, one conveyor 10 is entirely equipped with drive rollers! 30, but it may also be in the form of a conveyor with one or more idler rollers disposed between drive roller arrangements.

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 visible body is pressurized or released through the fluid supply/discharge path, and the visible body expands and contracts and is brought into contact with or separated from the inner surface of the roller body, thereby reducing the pressure of the roller body. The conveyed object can be conveyed by forcibly rotating the
Alternatively, the conveyance of the object can be stopped by canceling the forced rotation.

In this way, by incorporating the visible body that connects and disconnects the transmission of rotational force into the roller body, the whole can be made low and compact, and it is also possible to prevent other objects from interfering with the transmission part of rotational force. and the communication can always be done well. By interposing the cylindrical member and the bearing device, the overall strength can be increased, and conveyance and conveyance stop can be performed smoothly and stably. Even more stickers! Accordingly, fluid can be prevented from leaking from the fluid supply/discharge path at the boundary between the rotating part and the non-rotating part, and reliable operation can always be expected.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway front view of the sealing device, FIG. 3 is a partially cutaway side view, and FIG. 4 is a partially cutaway front view of the sealing device. 5 is a front view of the shelf equipment, FIG. 5 is a side view thereof, and FIG. 6 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, 34...bearing equipment! , 35... cylinder member, 3
7... Sprocket (passive part), 38... Roller body, 38a... Inner surface, 39A, 39B... Bearing device, 45... Rubber tube (visible body) 1, 45c...
- Elastic part, 45d... Contact part, 47... Fluid supply/discharge path, 48... Seal device, 51A, 51B... Packing material, 52A, 52B... Spring, 66...
Cheno, 71... Transport route, 72... Load, 73...
・Pallet, 74...Conveyor frame, 86...
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 supported by a frame, a cylindrical member fitted onto the roller shaft through a bearing device so as to freely rotate and having a passive portion at the outer end, and a cylindrical member extending from the cylindrical member to the roller shaft. a roller body that is fitted and freely rotatably supported via a bearing device; a flexible body that is attached to the cylindrical member and that can freely come into contact with and separate from the inner surface of the roller body through expansion and contraction;
Consisting of a fluid supply/discharge path opening into the flexible body from the roller shaft through the cylindrical member, and a sealing device interposed between the roller shaft and the cylindrical member to form a part of the fluid supply/discharge path. A driving roller device characterized by: