JP2592702B2 - Roller device with brake - Google Patents

Description

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

2. Description of the Related Art Conventionally, as a roller conveyor, for example, an actual open flat 1-
The structure found in the 121008 publication is provided. In this conventional structure, a large number of rollers are provided only freely in a main body frame to form a transport 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 a transmission roller and a passive sprocket that can abut on the lower periphery of the adjacent idler roller are freely rotatable on this support shaft. In addition, the chain 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 type, the transmission roller is rotated by a chain via a sprocket, and the rotation of the transmission roller is transmitted to the idler roller that is in contact with the roller, whereby the transported object is rotated by the rotation of the idler roller group. It is transported on the transport route.
By controlling the supply and discharge to and from the cylinder device and moving the support shaft up and down, the drive mode is switched between the drive mode in which the transmission roller is in contact with the idler roller and the non-drive mode in which the transmission roller is separated from the idler roller. Therefore, the transfer force to the transferred object is cut off, and the transferred object is sequentially stored.

Problems to be Solved by the Invention According to the conventional type described above, since the transmission roller and the like are disposed below the idler roller, the whole is bulky and large. In addition, oil and dust on the transported object side easily intervene between the idle roller and the transmission roller, which adversely affects the transmission of rotational force due to contact. Further, since each roller is freely rotatably mounted, the roller is coasted immediately after the power transmission roller is separated from the drive roller to be in the non-drive mode, so that the conveyed object coasts free and stops in front. The object to be transported strongly. Therefore, a large number of stopper devices are required to accurately stop the transferred object.

It is an object of the present invention to normally carry out forcible conveyance of an object to be conveyed, and to brake the object to be conveyed as necessary, and to make the whole compact.
An object of the present invention is to provide a roller device with a brake in which other objects do not intervene in a transmission portion of a rotational force.

Means for Solving the Problems In order to achieve the above object, a roller device with a brake according to the present invention comprises a roller shaft supported by a frame, a roller shaft which is fitted around the roller shaft in a freely rotatable manner, and a passive portion provided at the outer end. A roller body that fits over the roller shaft from the cylinder member and is freely rotatable; and is attached to the cylinder member and freely comes into contact with and separates from the inner surface of the roller body by expansion and contraction. A first flexible body, a second flexibility attached to the roller shaft, and capable of coming into contact with and separating from the inner surface of the roller body by expansion and contraction; It comprises a first fluid supply / discharge passage opening into the flexible body and a second fluid supply / discharge passage opening through the roller shaft into the second flexible body.

According to the configuration of the present invention described above, by applying a rotational force to the passive portion, the first flexible body can be integrally rotated via the tubular member. In this state, a fluid is supplied into the first flexible body through the first fluid supply / discharge path, and the first flexible body is expanded by the pressure, so that the first flexible body abuts on the inner surface of the roller body ( Pressure contact), so that the conveyed object can be conveyed by rotating the roller body integrally. Further, when the pressure in the first flexible body is released through the first fluid supply / discharge passage, the first flexible body contracts and separates from the inner surface of the roller body, so that no rotational force is transmitted. At this time, a fluid is supplied into the second flexible body through the second fluid supply / discharge passage, and the second flexible body is expanded by the pressure, so that the second flexible body is brought into contact with the inner surface of the roller body (pressure contact). ), So that the roller body can be braked by the second flexible body integrated with the frame side via the roller shaft. Further, when the pressure in the second flexible body is released through the second fluid supply / discharge passage, the second flexible body contracts and separates from the inner surface of the roller body, and the roller body is released from braking and becomes freely rotatable. .

An embodiment of the present invention will be described below with reference to the accompanying drawings, in which a conveyor provided with a roller device with a brake according to the present invention is incorporated.

4 and 5, 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
A roller conveyor 12 composed of a pair of left and right conveyors 10 and 11 is horizontally arranged in a plurality of compartment storage spaces 7 formed in the left and right direction and in a plurality of stages in the up and down direction. Has been established. That is, as shown in FIGS. 1 to 4, the conveyor frame 14 of one of the conveyors 10 includes a pair of left and right side plates 15, 16 and upper plates 17, 18 which are bent outward from the upper ends of the both side plates 15, 16. And a bottom plate 19 connecting the lower ends of both side plates 15 and 16 to form a cross-sectional shape. A plurality of notches 20 and 21 for mounting a roller device with a brake and a roller device (described later) are formed at predetermined pitches in the length direction from the upper portions of the side plates 15 and 16 to the upper plates 17 and 18. A bolt hole 22 for fixing a guide rail (described later) is formed in a lower portion of one of the side plates 15. 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 in the bottom plate 19 in the conveyor frame 14.
The bolts 26 fixed on the top 19 and passed through the through holes 25 formed in the cross members 4 and 5 from below are inserted into the nuts through the bolt holes 23.
It is freely adjustable to 24.

As shown in FIG. 1 and FIG.
Are hard rubber caps 32, 3 at both ends of the roller shaft 31.
The roller shaft 31 is supported by the conveyor frame 14 by dropping the caps 32 and 33 into the notches 20 and 21 from above. An outer cylindrical member 35A 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 outer cylindrical member 35A. I have. The inner member 35B is externally fitted from the roller shaft 31 to the outer cylindrical member 35A, and the two cylindrical members 35A, 35B are integrated by a bolt 44. The cylindrical roller body 37 externally fitted from the outer cylindrical member 35A to the roller shaft 31 has a play by a bearing 38 provided between the outer cylindrical member 35A and a bearing 39 provided between the roller shaft 31. Be free to roll. Double bearing 38,39
Between the inner cylindrical member 35B and the inner surface 37a of the roller body 37, the first cylindrical member 35B is capable of coming into contact with and separating from the inner surface 37a by expansion and contraction.
A first rubber tube 40, which is an example of a flexible body, is externally fitted, and the first rubber tube 40 is fixed to the inner cylindrical member 35B via a pair of bands 41,. The first rubber tube 40
A pair of left and right cylindrical portions 40a on which the bands 41 and 42 act, a flange portion 40b provided continuously from the inner end to the outer side from the cylindrical portion 40a, and an elastic portion 40c between the outer ends of the flange portions 40b. And an abutting portion 40d continuously provided through the elastic portion 40c.
It is elastically biased away from 7a. Inner tube member
Roller shaft 3 between 35B and the other bearing 39
A second rubber tube 45, which is an example of a second flexible body that can freely contact and separate from the inner surface 37a of the roller body 37 due to expansion and contraction, is externally fitted to 1. The rubber tube 45 includes a pair of bands. It is fixed to the roller shaft 31 via 46 and 47. The second
The rubber tube 45 has a pair of left and right cylindrical portions 45a on which the bands 46 and 47 act, a flange portion 45b continuously provided from the inner end of the cylindrical portion 45a to the outside, and an elastic portion between the outer ends of the flange portions 45b. The elastic portion 45c elastically urges the contact portion 45d to be separated from the inner surface 37a. The rubber tubes 40 and 45 are formed of a material that increases the frictional force at the contact portions 40d and 45d. A first fluid supply / discharge passage 43 that opens from the roller shaft 31 through the inner cylindrical member 35B into the first rubber tube 40 is a roller shaft.
A shaft channel 43a formed from one end to the center on the axis of the shaft 31 and opened in the radial direction, and an annular recess formed in the inner surface of the inner cylindrical member 35B so that the shaft channel 43a always communicates. Channel 4
3b, a cylindrical channel 43c formed in the inner cylindrical member 35B for communicating the annular channel 43b into the first rubber tube 40, and one cap 32 for communicating with one end of the shaft channel 43a. It is formed from the formed piping channel 43d. A second fluid supply / discharge passage 48 that opens into the second rubber tube 45 through the roller shaft 31 is formed from the other end to the middle on the axis of the roller shaft 31 and is radially opened second rubber. It is formed from a shaft passage 48a communicating with the inside of the tube 45, and a piping passage 48b formed in the other cap 33 so as to communicate with the other end of the shaft passage 48a. 49 indicates a sealing member.

The roller device 28 has the same structure as the brake-equipped roller device 30, and the second rubber tube 45, the second flow supply / discharge passage 48, and the like are removed as shown in FIGS. .

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 54 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, 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 to 4, the conveyor frame 64 of the other conveyor 11 includes a pair of left and right side plates 65 and 66,
The upper plates 67, 68 bent outward from the upper ends of the both side plates 65, 66 and the bottom plate 69 connecting the lower ends of the both side plates 65, 66 are formed in a cross-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 corresponding to 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 roller conveyor 12 composed of the pair of conveyors 10 and 11 has, for example, as shown in FIG. In the embodiment, eight groups A, B, C,
D, E, F, G, H are provided. In each of the groups A to H, at least one roller is a roller device with a brake.
30 and the remainder becomes the roller device 28. Each group A ~
For H, the first rubber tube 40 can contact and separate freely,
At that time, an electromagnetic valve 90 for reversibly operating the second rubber tube 45 of the roller devices 30 and 30 with brake and the first rubber tube 40 of both roller devices 28 and 30 is provided. That is, in each group unit, the pipe flow path 48b of the roller device 30 with brake
1st supply / discharge hose 91 connected to
30 and a second supply / discharge hose 92 in which the pipe passages 43d of the drive roller device 28 are connected in series.
1, 92 can be connected to and disconnected from a common supply hose 94 from a supply device 93 via the 5-port solenoid valve 90.
On the downstream side of each of the groups A to H, an optoelectronic switch 97, which is an example of a presence detector, is provided. Here, in the two groups adjacent in the transport direction 13, when the optoelectronic switch 97 of the upstream group is detected and the optoelectronic switch 97 of the downstream group is not detected, the first rubber tubes 40 of both groups are simultaneously activated. Contact (supply hose 94 and second
(Communication with the supply / discharge hose 92). When the optoelectronic switches 97 of both groups are simultaneously detected or non-detected, the first rubber tubes 40 of both groups are simultaneously moved apart (the supply hose 94 and the second supply / discharge hose 92 are cut off). I have. To that end, each solenoid valve 90 is incorporated in a respective control unit 98. Also, only the lowermost group A is configured so that the first rubber tube 40 moves away when the optoelectronic switch 97 detects and moves. 99 indicates a stopper.

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

Each of the roller devices 28 and 30 indicated by solid lines in FIGS. 1 to 3 switches the solenoid valve 90 to connect the supply hose 94 to the second supply / discharge hose 92, and the air supplied through the first fluid supply / discharge passage 43. The first rubber tube 40 is expanded by the pressure of (fluid), and the elastic portion 40 is expanded.
This shows a state in which a contact portion 40d that moves outward against c is brought into contact (pressed contact) with the inner surface 37a of the roller body 37. At this time, the chain 56 is constantly driven by the motor 60,
Therefore, the two cylindrical members 35A and 35B rotate around the roller shaft 31 via the sprocket 36 engaged with the chain 56. Further, since the first rubber tube 40 that rotates integrally with the inner cylindrical portion 35B 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 roller units 28 and 30 of the conveyors 10 and 11 and the idle roller
The pallet 63 supported between the roller body 37 and the roller body 37
The sheet is conveyed on the conveyance path 61 while receiving the conveyance force due to the forced rotation of the group. Then, the non-driven idle roller group 80 performs the following rotation. At this time, the first supply / discharge hose 91
Is released, and the pressure in the second rubber tube 45 is released in the roller device 30 with brake as shown by the imaginary line in FIG. 1 and the solid line in FIG. The portion 40d moves (reduces) inward and is separated from the inner surface 37a of the roller body 37. Therefore, the roller body 37 is not braked. Such a state is shown by groups C and D in FIG.

For example, as shown by groups A, B, E, F, G and H in FIG. 6, when the solenoid valve 90 is switched to connect the supply hose 94 to the first supply / discharge hose 91, the two roller devices 28 and 30 are switched. As shown by the phantom lines in FIGS. 1 to 3, when the pressure in the first rubber tube 40 is released, the contact portion 40b is separated from the inner surface 37a of the roller body 37, and Is not forcibly rotated. At this time, in the roller device 30 with a brake, as shown by the phantom lines in FIGS. 1 and 3, when the inside of the second rubber tube 45 is pressurized, the contact portion 45b contacts the inner surface 37a of the roller body 37. (Pressing), the roller body 37 is braked, and the rotation is stopped, whereby the pallet 63 can be braked to prevent conveyance.

Roller conveyor 12 consisting of a pair of conveyors 10, 11
Basically, the pallet 63 (load 62) is conveyed as described above, and the pallet 63 is actuated and braked. The transport control is performed by switching. That is, when the forklift truck 8 unloads the pallet 63 onto the group H at the upstream end while the transport path 61 is empty, the optoelectronic switch 97 of the group H is detected but the optoelectronic switch 97 of the group G is not detected. Accordingly, the operation of the control unit 98 and the solenoid valve 90 causes the first rubber tube 40 to abut and rotate the roller bodies 37 of the groups H and G, and the second rubber tube
The pallet 63 is moved from the group H to the group G by moving the pallet 45 away from the pallet 63. When the pallet 63 enters the group G, the photoelectric switch 97 of the group G
Since the detecting and moving group F is not detected, the first rubber tubes 40 of the groups G and F move in contact with each other, and the second rubber tubes 45 move away from each other to be driven. Transport to group F. The pallets 63 sequentially transported to the downstream side in this way are detected by the photoelectric switch 96 of the group A before coming into contact with the stopper 99, whereby the first rubber tube 40 of the group A is moved apart and the second rubber tube 40 is moved. The tube 45 abuts and moves to a braking state. Therefore, the pallet 63 is braked to stop the conveyance, and the pallet 63 is stored in the group A. The second pallet 63 is conveyed in the same manner, enters the group B and is detected and moved. At this time, since the group A is also detected and moved, the first rubber tube 40 of the group B moves apart. At the same time, the second rubber tube 45 abuts and moves to a braking state, so that the pallet 63
Is stored in group B without abutting on the pallet 63. In such a work, for example, the pallets 63 are stored in all the groups A to H, and all the groups A to H are stored.
ＨH are assumed to be in a braking state. When the pallet 63 of the group A is taken out by the forklift truck 8 in this state, the optoelectronic switch 97 of the group A is not detected, so that the first rubber tubes 40 of the groups A and B contact and move, and the second rubber tube 45. Are separated from each other, so that groups A and B are driven and the pallet 63 of group B is moved to group A.
Conveyed to. Then, the photoelectric switch 97 of the group B
Are not detected, the groups B and C are driven, and the pallet 63 of the group C is transported to the group B. By repeating such an operation, the pallet 63 can be sequentially fed.

In the above embodiment, the passive portion is formed by the sprocket 36 and the type driven by the chain 56 is shown, but this is a type using a round belt or the like, a type combining a drive shaft and a trapezoidal roller, a drive shaft and a bevel gear. May be combined.

Further, in the above embodiment, the roller conveyor 12 is constituted by the pair of right and left conveyors 10 and 11, which is a roller main body.
By increasing the length of 37 or the like, the roller conveyor 12 may be configured with only one conveyor 10.

Further, in the above embodiment, all of the one conveyor 10 is constituted by the roller device 28 and the roller device 30 with a brake, but this is a conveyor configuration in which one or a plurality of idler rollers are arranged between the roller devices 28. It may be. Further, all of the one conveyor 10 may be constituted by the roller device 30 with brake.

In the above-described embodiment, the type in which the roller conveyor 12 including the conveyors 10 and 11 is incorporated into the shelf frame 1 has been described, but this may be a floor conveyor type installed on the floor or the like.

According to the present invention having the above-described configuration, by applying a rotational force to the passive portion, the first flexible body can be integrally rotated via the cylindrical member, and in this state, the first flexible body can be rotated through the first fluid supply / discharge passage. 1 By supplying a fluid into the flexible body and inflating the first flexible body with the pressure, the first flexible body can be brought into contact (pressed contact) with the inner surface of the roller main body, whereby the roller The transported object can be transported by rotating the main body integrally. Also the first
By releasing the pressure in the first flexible body through the fluid supply / discharge passage, the first flexibility can be reduced and separated from the inner surface of the roller main body, so that the rotational force cannot be transmitted. At this time, a fluid is supplied into the second flexible body through the second fluid supply / discharge passage, and the second flexible body is expanded by the pressure, so that the second flexible body is brought into contact with the inner surface of the roller body (pressure contact). ), Whereby the roller body can be braked by the second flexible body integrated on the frame side, and the conveyance of the conveyed object can be stopped. Further, when the pressure in the second flexible body is released through the second fluid supply / discharge passage, the second flexible body contracts and separates from the inner surface of the roller main body, and the roller main body is released from braking and freely rotates. Thus, the object can be supported and transported. The first flexible body for driving in this way and the second flexible body for braking
By incorporating the flexible body in the roller body, the whole can be made low and compact, and furthermore, it is possible to prevent other things from intervening in the torque transmitting part and the braking part, and the transmission and braking are always good. Can be done.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a partially cutaway front view of a roller device portion with a brake, FIG. 2 is a partially cutaway front view of a roller device portion, and FIG. Chipped side view, fourth
The figure is a front view of the shelf equipment, FIG. 5 is a side view of the same, and FIG. 6 is a schematic side view showing a use state. 1 ... shelf frame, 10, 11 ... conveyor, 12 ... roller conveyor, 14 ... conveyor frame, 20, 21 ... notch, 28
…… Roller device, 30 …… Roller device with brake, 31 ……
Roller shaft, 32, 33 Cap, 34 Bush, 35A
... Outer cylinder member, 35B ... Inner cylinder member, 36 ... Sprocket (passive part), 37 ... Roller body, 37a ... Inner surface, 40 ...
... First rubber tube (first flexible body), 43... First fluid supply / discharge path, 45... Second rubber tube (second flexible body), 48.
2nd fluid supply / discharge path, 50 guide rail, 56 chain (driving body), 61 transport path, 62 load, 63 pallet, 64 conveyor frame, 80 idler roller , 90…
.., A solenoid valve, 91, a first supply / discharge hose, 92, a second supply / discharge hose, 97, a photoelectric switch, 98, a 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 first flexibility 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; A second fluid that can freely contact and separate from the inner surface of the roller main body, a first fluid supply / discharge path that opens from the roller shaft through the tubular member into the first flexible body, and the roller shaft. A roller device with a brake, comprising: a second fluid supply / discharge passage opening into the second flexible body.