JP2860155B2 - Roller conveyor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor for supporting and transporting a pallet on which a load is placed or a load itself.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, for example, a structure disclosed in Japanese Utility Model Laid-Open No. 1-118905 has been provided. This conventional structure has a group of idler rollers, a drive device that can be connected to and separated from these idler rollers, and a chain that is interlocked with these drive devices. Is divided into Each group is provided with a valve device that separates and drives the drive device when it is loaded, and constitutes an operating circuit incorporating the valve device and the like.

According to the conventional type described above, by providing a valve device for each group corresponding to one transported object, a large number of expensive valve devices are required, and in particular, the transported object is short. If a large number of groups are formed, the number becomes considerable and the control becomes complicated.

An object of the present invention is to provide a roller conveyor capable of reducing the number of load detectors such as valve devices.

Means for Solving the Problems In order to achieve the above object, a roller conveyor according to the present invention includes a roller group, a transmission device that can be connected to and separated from these rollers, and a driving body that is interlocked with these transmission devices. The roller group is divided into a number of groups corresponding to one transported object, and divided into a plurality of zones by a plurality of groups, and two zones on the upstream side and a zone on the downstream end are grouped in each group. In the middle zone group, only the lower group is provided with the presence detector, and in the zones at the upstream end and the downstream end, the conveyed objects are sequentially sent to the lower group, and the upstream end and the downstream end are provided. In each zone except the end zone, when the adjacent lower zone is empty, all conveyed objects are transferred to the lower zone, and in the upstream end zone, the lower end group in the second zone from the upstream is transferred. When the loop is empty, a control circuit for operating the transmission based on the detection of the presence detector is provided to transfer all the conveyed objects to the lower side.

According to the configuration of the present invention, in the zone at the upstream end and the zone at the downstream end, conveyed objects can be sequentially fed one by one based on detection and non-detection by the presence detectors provided in each group. Then, a plurality of objects to be conveyed whose maximum number corresponds to the number of groups can be simultaneously conveyed between the zones. In the zone at the upstream end, the objects to be conveyed are simultaneously conveyed based on the detection and non-detection by the presence detector provided in the group at the lower end in the second zone from the upstream, and the upstream end in the zone at the upstream end Group can be emptied quickly. At that time, in the intermediate zone group, only one presence detector is required regardless of the number of groups, so that the number can be reduced as compared with those provided in all groups.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

11 and 12, 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. 9 and 10, the conveyor frame 14 of one of the conveyors 10 is formed in a cross-sectional shape, and a resin roller 20 is formed.
Is mounted on the conveyor frame 14 via the roller shaft 21 and is freely rotatable around a roller axis 22. A guide rail 23 is disposed at one corner at the bottom of the conveyor frame 14 over the entire length. The guide rail 23 has a dovetail groove 24 on the outside and a pair of upper and lower guides 25, 26 on the inside. Having. A plate-shaped nut 27 is slidably fitted into the dovetail portion 24, and a bolt 28 passed from the outside to the conveyor frame 14 is fitted to the nut 27 and tightened, so that the nut 28 is fixed to the conveyor frame 14. Guide rail
23 can be fixed. In the chain 30, which is an example of the driving body, the upper path is supported and guided by the upper guide section 25, and the lower path is supported and guided by the lower guide section 26. The chain 30 is stretched between a driving sprocket 31 and a driven sprocket 32 via a guide sprocket 33 and the like, and connects the driving sprocket 31 to a motor 34 (see FIG. 1).
Reference numeral 35 denotes a transport route. 36 is an example of a load,
Handled via palette 37.

In the conveyor frame 14 between the roller 20 and the guide rail 23, the roller 20
A transmission device 40 is provided which can be connected and separated. That is, the resin support frame 41 is one support plate 42 that can be freely applied to the inner surface of the side plate of the conveyor frame 14 and can be fitted into the upper part of the guide rail 23, and from the front and rear ends of the one support plate 42 toward the other. A pair of continuously provided cover plates 43 and a receiving plate 44 connecting the lower ends of the cover plates 43 and extending toward the other.
And the other support plate 45 which is integrated with the other end of the receiving plate 44 and can be applied to the inner surface of the other side plate. Here, the receiving plate 44 can be mounted on the bottom plate, and a main body 47 of a cylinder device 46, which is an operating device using fluid, is integrally formed at an upper portion of the receiving plate 44, and a pipe holding portion 48 is formed at a lower portion. Is provided. A bearing hole 49 is formed in the center of the one support plate 42, and a loose fitting hole 50 is formed in the other support plate 45 to face the bearing hole 49. Both support plates 4
A nut 51 is fixedly embedded in each of the nuts 2 and 45, and a bolt 52 passed through the conveyor frame 14 from the outside is fitted to the nut 51 and tightened.
Fixed on the side. The cylinder device 46 is provided with a band 54 after the expandable and contractable rubber body 53 is externally fitted to the main body 47 from above.
It is constituted by fixing with such as. The roller shaft center
The support shaft 55 along the shaft 22 has one end fitted into the bearing hole 49 and the other end protruding into the loose fitting hole 50, thereby forming the bearing hole.
With the 49 as a fulcrum, it can be swung up and down within a certain range. The support shaft 55 is an example of a passive wheel body and
A sprocket 56 which is always engaged with the sprocket 30 is freely rotatably mounted on the sprocket 30, and a transmission roller 57 is attached to a boss portion of the sprocket 56.
Are externally fitted to allow both 56 and 57 to rotate integrally. The transmission roller 57 is made of urethane rubber, and the outer periphery thereof can freely contact and separate from the lower part of the outer periphery of the roller 20. Then, a cylinder rubber receiver 58 attached to the other end of the support shaft 55 is
The transmission roller 57 is configured to contact and separate from the roller 20 from below by operating the cylinder device 46 by contacting the transmission roller 57 from above.

The pairs of the rollers 20 and the transmissions 40 described above are arranged alternately, and between each of the rollers 20, an idle roller 59 is provided with a roller shaft 60.
It is arranged through.

A conveyor frame 62 of the other conveyor 11 is formed in a cross-sectional shape, and a resin idler roller 63 is
It is arranged through.

Ring-shaped flanges 38, 61, 65 are attached to the rollers 20 and the idle rollers 59, 63 at intermediate positions thereof. These flanges 38, 61, 65 are formed so that their peripheral edges are inclined outward. At this time, the flange 38 on one side is disposed so as to be located inside a contact portion of the transmission roller 57. Further, a cover 15 that covers the above-mentioned contact portion and reaches near the flange 38 is continuously provided from the upper end of the one side plate of the one conveyor frame 14.

As described above, the roller conveyor 12 composed of the pair of conveyors 10, 11 is composed of six (plural) rollers 31 corresponding to the length of one pallet 48 as one group, as shown in FIG. A plurality of groups are arranged in the transport direction 13, and in the embodiment, eight groups A, B, C, D, E, F, G, and H are arranged. Further, groups A to H are divided into two groups (a plurality of groups) to form a plurality of zones. In the embodiment, four zones I, II, III and IV are formed. And zone I on the downstream end and 2 on the upstream side
One of the zones III, IV is a valve device 70A, 70B, 70E, 70F, 70G, 70H, which is an example of a presence detector for each group A, B, E, F, G, H.
In addition, in the middle zone II group, only the lower group C is provided with the valve device 70C, and in the zone IV at the upstream end, a pair of switching valve devices 70g and 70h are provided. Here, in the zones IV and I at the upstream end and the downstream end, the pallets 37 are sequentially fed to the lower group in the zones IV and I, and the zones IV and III in the middle and the zones IV and IV at the upstream end
In order to transfer all (two) pallets 37 when the adjacent lower zones I, II, III are empty, the valve devices 70A,
A control circuit 69 for operating the transmission 40 based on the detection operation of 70B, 70C, 70E, 70F, 70G, 70H is provided. That is, a supply / discharge hose 71 in which the cylinder devices 46 are connected in series is provided in each of the groups A and B in the zone I at the downstream end, and in each of the zones in the remaining zones II, III and IV. And each supply and discharge hose 71, the valve device 70A,
Via a connection hose 73 that interposes 70B, 70C, 70E, 70G and a shuttle valve 72 located at the lower side, it can be selectively connected and disconnected to a common air supply hose 75 from an air supply device 74. It is. Each of the valve devices 70A to 70H is a mechanical valve, and its upward operating rod 76 protrudes above the transport surface above the lowermost roller 20 in the corresponding group. The valve devices 70A to 70H connect and move the supply / discharge hose 71 to the air supply hose 75 when the operating rod 76 projects upward without the pallet 37, and supply / discharge when the pallet 37 is pressed down. An operation is performed to disconnect the hose 71 from the air supply hose 75. In Zone I at the downstream end, Group A
Hose 7 between valve device 70A and shuttle valve 72 at
The three parts and the shuttle valve 72 part in group B are connected by a first communication hose 77. The shuttle valve 72 in the intermediate zones III and II is connected to the downstream zone I.
A connecting hose 73 between the valve devices 70C and 70B and the shuttle valve 72 in I and I is connected via a second connecting hose 78. A third connecting hose 79 and a fourth connecting hose 80 are branched from a connecting hose 73 portion between the valve device 70E and the shuttle valve 72 in the second zone III from the best. The third communication hose 79 includes the valve device 70F corresponding to the group F and the shuttle valve 81 on the switching valve device 70g side, and is connected to the switching valve device 70h. The valve device 70H corresponding to the group H is interposed in the fourth communication hose 80, and is connected to the switching valve device 70h. Further, the switching valve devices 70g and 70h are connected by a fifth communication hose 82, and the switching valve device 70h and the shuttle valve 72 are connected by a sixth communication hose 83. Hose and valve device 70-83 mentioned above
The control circuit 69 is configured by the above-described method. Reference numeral 85 denotes a stop.

Next, storing and transporting work of the load 47 in the above embodiment will be described.

9 and 10, the valve devices 70A, 70B, 70C, 70E, 70G are switched to connect the air supply hose 75 to the supply / discharge hose 71, and the support shaft 55 is moved upward by the expansion of the cylinder device 46 due to the air pressure. And the transmission roller 57 is pressed against the corresponding roller 20 from below. At this time, the chain 30 is constantly driven by the motor 34, and the sprocket 56 engaged with the chain 30 is rotating around the support shaft 55. Further, the transmission roller 57 is in contact with the lower part of the outer periphery of the roller 20, thereby forcibly rotating the group of rollers 20. As a result, the pallets 37 on the transport path 35 are
The roller 20 is supported between the idle rollers 59 and 63 and is conveyed on the conveyance path 35 in a state where it receives the conveying force due to the forced rotation of the rollers 20. At this time, the non-driven idler rollers 59 and 63 perform the following rotation. Further, the pallet 37 has a flange 3 on one of the conveyors 10.
8, 61 and the flange 65 of the other conveyor 11, when they are to be shifted sideways during transportation, they are received by these flanges 38, 61, 65 and do not fall off.

Roller conveyor 12 consisting of a pair of conveyors 10, 11
Basically, the transfer of the pallet 37 load 36 is performed as described above, but in actuality, the transfer control is performed based on the detection and non-detection of the pallet 37 by the operating rods 76 of the valve devices 70A to 70H. You. That is, when the transport path 35 is empty, since the operating rod 76 of each of the valve devices 70A, 70B, 70C, 70E, and 70G is protruding without detection, the air from the air supply hose 75 is It is supplied to all the supply / discharge hoses 71 through these valve devices, and the cylinder devices 46 are operated to forcibly rotate all the rollers 20 of all the groups A to H. The remaining valve devices 70F and 70H shut off the communication hoses 79 and 80 because the operating rod 76 protrudes without detection. In this state,
When the pallet 37 is unloaded from the upstream end of the group H by the forklift truck 8, the valve device 70H of the group H is depressed with its operating rod 76, and the valve device 70G of the group G, which is one downstream, is connected. As described above, since the detection is not performed, the forced rotation of the zone IV is maintained, and the pallet 37 is conveyed from the group H to the group G. When the pallet 37 enters the group G, the valve device of this group G
In the 70G, the operating rod 76 is pushed down to perform the dividing operation, and
Since the connecting hose 83 is shut off, the group G is not driven, and the pallet 37 is stored in the group G. Next, when the pallet 37 is unloaded to the group H, the valve device 70H of the group H is pushed down and connected, whereby the air pressure is supplied via the switching valve device 70h and the sixth communication hose 83. Thus, the zone IV is forcibly rotated. Therefore, the two pallets 37 in zone IV are simultaneously transported to zone III. The pallets 37 successively transported to the downstream side in this way come into contact with the stopper 85 and stop, and are stored in the zone I. When the pallet 37 is detected by the valve devices 70A and 70B of the zone I and the partitioning operation is performed, the air supply to the supply / discharge hose 71 of the zone I is stopped, and at the same time, the supply / discharge hose 71 is opened and the transmission of the zone I is performed. The device 40 moves apart. The next pallet 37 is similarly conveyed and stored in zone II. In this state, the pallets 37 are stored in all the groups A to H, and all the rollers 20 are not driven.
As shown in FIG. 2, when the pallet 37 of the group A is taken out by the forklift truck 8, the group A is driven because the valve device 70A of the group A is connected and detected without detection, and the group A is driven via the first connecting hose 77. As a result, the pallet 37 of the group B is conveyed to the group A as shown in FIG. Then, the valve device 70A of the group A is detected by the palette 37 of the group A, and the group A is not driven by the separating operation. Next, when the pallet 37 of the group A is taken out, the two valve devices 70A and 70B of the zone I are not detected and are connected to each other.
As shown in the figure, the roller 20 in the zone I is driven. At the same time, zone II is driven via the second connecting hose 78,
As shown in FIG. 5, a plurality of zones II (2
Of the pallets 37 are conveyed to the zone I simultaneously (at once). Subsequently, similarly, as shown in FIG.
A plurality of pallets 37 of III are transported simultaneously to zone II, and a plurality of pallets 37 of zone IV are transported to zone III at the same time, and as shown in FIG. At that time, Zone IV at the upstream end
Then, at the same time when the valve device 70E provided in the lower group E in the second zone III from the upstream is not detected,
The pallet 37 is simultaneously transported to the zone III, so that the upstream end group H in the upstream end zone IV quickly becomes empty. At this time, in the zone IV, the two valve devices 70G and 70H are not detected. By supplying a new palette 37 on the group H as shown in FIG. 7, the palette 37 is forwarded to the group G as described above and stored as shown in FIG.

In the above-described embodiment, only one intermediate zone II having only one valve device is shown, but a zone corresponding to this zone II is provided with a number of zones.

In the above-described embodiment, the roller conveyor 12 including the pair of conveyors 10 and 11 has been described. However, the roller conveyor 12 may be a roller conveyor 12 using an integrated roller in the left-right direction.

In the above-described embodiment, the type in which the roller conveyor 12 is incorporated in the shelf frame 1 has been described. However, the type in which the roller conveyor 12 is installed on the floor may be used.

According to the present invention having the above-described configuration, in the zones at the upstream end and the downstream end, the objects to be conveyed can be sequentially forwarded one by one based on detection by the presence detectors provided for each group, non-detection,
This makes it possible to smoothly carry in or carry out the conveyor from the start end to the conveyor start end. And between each zone, a plurality of objects whose maximum number corresponds to the number of groups can be simultaneously conveyed, and in the zone at the upstream end, it is provided in the group at the lower end in the second zone from the upstream. Conveyed objects are simultaneously conveyed based on detection and non-detection by the presence detector, and the upstream end group in this upstream end zone can be quickly emptied, and the conveyed objects by a forklift truck etc. for the upstream end group Wholesale operations can be performed efficiently, and in that case, in the middle zone group, one inventory detector is sufficient regardless of the number of groups, so the number of expensive inventory detectors such as valve devices is reduced. It can be reduced and the control can be simplified.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a schematic side view including a piping system, FIGS. 2 to 8 are schematic side views showing a use state, and FIG. Cutaway side view,
FIG. 10 is a partially cutaway front view of a main part, FIG. 11 is a partially cutaway front view of shelf equipment, and FIG. 12 is a side view of the same. DESCRIPTION OF SYMBOLS 1 ... Shelf frame, 7 ... Section storage space, 10, 11 ... Conveyor, 12 ... Conveying device, 13 ... Conveying direction, 14 ... Conveyor frame, 20 ... Roller, 23 ... Guide rail, 25 , 26
…… Guide part, 30… Chen (drive body), 31… Driving sprocket, 32… Driving sprocket, 35… Transport path, 36… Load (transported object), 37… Pallet, 40… Transmission device, 41: Support frame, 46: Cylinder device (actuator), 47: Main body, 49: Bearing hole, 53: Rubber body, 55
…… Support shaft, 56 …… Sprocket, 57 …… Transmission roller, 59
… Idling roller, 62… Conveyor frame, 69… Control circuit, 70A, 70B, 70C, 70E, 70F, 70G, 70H… Valve device (load detector), 70g, 70h… Switching valve device , 71… Supply / discharge hose, 73… Connection hose, 75… Supply air hose, 77, 78, 79, 8
0,82,83 …… A connecting hose.

Claims (1)

(57) [Claims] The present invention has a roller group, a transmission device which can be connected to and separated from these rollers, and a driving body interlocked with these transmission devices, wherein said roller group corresponds to one of the objects to be conveyed. It is divided into a number of groups, divided into a plurality of zones by a plurality of groups, two upstream zones and a downstream end zone are provided with a presence detector for each group, and the middle zone group is a lower group. Only the presence detector is provided, and in the zones at the upstream end and the downstream end, the conveyed objects are sequentially sent to the lower group, and in each zone except the zone at the upstream end and the downstream end, when the adjacent lower zone is empty, all In the zone at the upstream end, when the group at the lower end in the second zone from the upstream is empty, to transfer all the objects to the lower end, Roller conveyors, characterized in that a control circuit for operating the transmission device based on the output.