JPH04140214A - Roller conveyor - Google Patents

Abstract

PURPOSE:To simplify piping including valves by providing a transmission gear and a braking device under each group of loosely rotating rollers, which is in each division of plural zones wherein they drive the transmission and apply the brake while being interlocked by means of fluid cylinders connected to one another via each common valve in a carrying roller conveyor by means of pallets. CONSTITUTION:For example, in zones C and D, a feed and discharge hose 63 is connected to a supply hose 65 with a valve 61 switched over, this thereby causes a cylinder device 32 to be moved upward so that each transmission roller 31 is brought into contact with each corresponding loosely rotating roller 11A from above, and each cylinder device 54 is concurrently extended downward so that each braking body 52 is thereby separated from each corresponding loosely rotating roller 11A. In this case, since a passive chain wheel 30 is normally operated by a motor 49 and a chain 45, each loosely rotating roller 11A in the zones C and D is forcibly rotated by each transmission roller 31, a carried article 57 is then carried. Carrying is thus put into operation by shifting the combination of transmission with releasing the brake to the combination of releasing the brake with transmission in order for every zone.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roller conveyor used, for example, when conveying workpieces via pallets.

2. Description of the Related Art Conventionally, as this type of roller conveyor, a structure as seen in, for example, Japanese Unexamined Utility Model Publication No. 1-91715 has been provided. In this conventional structure, a large number of conveyance rollers are provided on the main body frame so that they can be rotated freely to form a conveyance path, and a support frame is provided on the main body frame side. The conveyance roller group is divided into a plurality of zones in the conveyance direction, and in each zone, a braking unit is disposed below one idle roller, and a transmission unit is disposed below the remaining idle rollers. The 0-car unit equipped with this has a cylinder device to act on the conveyance rollers, and the cylinder device! The structure is such that it becomes inactive due to its own weight (or due to the downward force exerted via a compression spring) when the valve is opened. In each group, the first cylinder device group of the transmission unit is connected to the first supply/discharge hose, and the second cylinder device group of the brake unit is connected to the first supply/discharge hose.
The cylinder device is connected to the second supply/discharge hose. Both supply and discharge hoses are connected to the air supply device via four-way solenoid valves.

According to this conventional type, by switching the solenoid valve to one side and connecting the air supply device to the first supply/discharge hose, the first cylinder device is operated to forcibly rotate the conveying roller group, and the second supply/discharge hose is forced to rotate. Open the hose to deactivate the second cylinder device. Then, by switching the solenoid valve to the other side and connecting the air supply device to the second supply/discharge hose, the second cylinder device is operated to forcibly stop one conveyance roller, and the first supply/discharge hose is forced to stop. Open it and install the first cylinder! is considered to have no effect.

Problems to be Solved by the Invention According to the above-mentioned conventional type, the solenoid valve is a four-way type and is expensive, and the provision of a large number of solenoid valves increases the overall cost. The hose requires two systems of piping, which increases production costs and makes piping mistakes more likely.

An object of the present invention is to provide a roller conveyor that can simplify valves and piping and reduce costs.

Means for Solving the Problems In order to achieve the above object, the roller conveyor of the present invention has a group of idling rollers for conveyance disposed on the main body frame side, and this group of idling rollers is divided into a plurality of zones in the conveying direction. , a transmission device is disposed below the idler roller, and a braking device is disposed below at least one idler roller in each zone,
The transmission device includes a cylinder device that brings the transmission body integrated with the rotating passive body into contact with the reversing roller against the elastic force, and the braking device brings the braking body from the idle roller against the elastic force. It has cylinder devices that are moved apart, and these cylinder devices are connected to a fluid supply source via a common valve for each group.

According to the structure of the present invention, by switching the valve to one side and connecting the fluid supply source to each cylinder device, the transmission device raises the transmission body against the elastic force and comes into contact with the idle roller. The idle roller can be forcibly rotated by the rotational force from the rotating passive part, and the braking device can also be used! In this case, the braking body can be lowered against the elastic force and separated from the reversing roller. Then, by switching the valve to the other side and opening each cylinder device, the transmission device can use its elastic force to lower the transmission body and separate it from the idle roller, and the braking device can use its elastic force to raise the braking body. The rotation of the idling roller can be forcibly stopped by bringing the idling roller into contact with the idling roller. Therefore, there is one system of piping from the valve to each cylinder device, and there are three valves.
The above-mentioned operation may be made possible in a directional manner, and the conveyed object may be sequentially fed between zones by such operation.

Example An embodiment of the present invention will be described below based on the drawings.

1 is a main body frame with a U-shaped cross section, and a pair of left and right side frames IA
, IB, and a base frame IC that connects the lower parts of these side frames IA and IB, and is installed at a predetermined height above the floor via a plurality of legs 2 connected to this base frame IC. 0 Both sides frame IA.

L-shaped guide portions 4A are provided on the opposing inner surfaces of 1B.

4B is formed, and further above is a nut body 5A.

Dovetail grooves 6A and 6B are formed to allow sliding of the slider 5B.

In addition, on one side frame IA, a pair of guide rails 9 and 10 are attached to the inner surface of the lower part through parts 7 and 8, respectively.
are arranged in the length direction of the frame.

A pair of left and right idle rollers 11 are provided on the main body frame 1 side.
Groups A and 11B are located inside the frames IA and IB on both sides! It is arranged with Here, one idle roller group 11A is connected to a transmission device 20. t or a braking device 50 as a unit.

That is, as shown in FIGS. 3 and 5, the transmission device 20 has a case-shaped supporting frame 21 made of resin as a main body, and has a vertical base plate 22 with a lower end fitted into the guide portion 4A. By screwing the bolt 23 passed through the middle of the base plate portion 22 into the nut body 5A, the frame can be moved (slidably) in the longitudinal direction of the frame and fixed at the changed position. The cover plate part 24 is connected inward from the inner surface of the lower half of the base plate part 22, and the connecting plate part 25 is connected between its lower ends.
are connected at. Furthermore, a bearing hole 2 is provided at the bottom of the base plate 22.
6 is formed, and a support shaft 27 in the left and right direction is formed in this bearing hole 26.
A groove 24a, which is open on opposite sides, is formed in the lower part of the zero-force bar plate part 24, into which the inner end of the support shaft 27 is fitted, so that the support shaft 27 can freely swing up and down. Horizontal plate part 28
The resin-made Japanese cedar board 28 consisting of a vertical board part 28b and a vertical board part 28b is attached to the support frame 21 side by inserting both edges of the horizontal board part 28a into the groove 24a and then fixing them. The support shaft 27 is inserted into the vertical recess 29 formed in the vertical plate portion 28b.
The outer ends of the support shafts 27 are fitted to restrict the vertical swing range of the support shaft 27. A passive silver ring 30, which is an example of a rotating passive body, is rotatably attached to the support shaft 27, and a transmission roller 31, which is an example of a transmission body, is fitted onto the protruding boss portion of the passive silver ring 30, so that both 30 .31 is integrally rotatable. The transmission roller 31 is made of urethane rubber, and its outer periphery can be freely connected to and separated from the outer periphery lower part of the idle roller 11A. A cylinder device (an example of a vertical movement device) 32 that uses air to perform connection and separation is connected to the support shaft 27.
It is interposed between the cylinder rubber receiver 33 attached to the outer end of the cylinder and the horizontal plate portion 28a of the L cedar board 28. Furthermore, L cedar board 2
A plate 35 is connected inwardly from the middle of the vertical plate portion 28b of 8 through a bolt 34. 6 or more 21 interposed with a compression spring 36 that presses down and biases the
.about.36 constitute the transmission device 20.

The vertical plate portion 28b of the cedar board 28 has the same height as the base plate portion 22, and the idle roller 11A is attached between the upper ends of these 28b and 22. In other words, idle roller 1
1A consists of a small width roller part 12a and a large width boss part 12b, and is externally fitted onto the roller shaft 13 via the boss part 12b so as to be freely rotatable, and washers 14 are externally fitted on both sides. An outer locking recess 37 that is open to the inside is formed at the upper end of the base plate portion 22, and an inner locking recess 38 that is open to the outside is formed at the upper end of the vertical plate portion 28b. Therefore, by engaging both ends of the roller shaft 13 with both the locking recesses 37 and 38, the idling roller 11A can be mounted.

As shown in FIG. 1, the drive device 44 linked to each transmission device 20 includes a chain 45 that meshes with each passive silver wheel 30, a driving silver wheel 46, a driven silver wheel 47, and a guide silver wheel 48 that extend the chain 45. A motor 4 interlocked with a driving silver wheel 44
9, and the cheno 45 is composed of the guide rail 9.
10 is supported and guided.

The braking device 50 has substantially the same structure as the transmission device 20, and only the different parts will be described below. That is, the fourth
As shown in FIG. 5, a non-passive silver ring 51 is reversibly attached to the support shaft 27, and a braking body 52 made of urethane rubber is fixed to a protruding boss portion of the non-passive silver ring 51. The non-passive silver ring 51 has a toothless shape, and has a half toothless portion 5.
1a is opposed to the chino 45, and a stopper body 53 that engages between the teeth of the remaining toothed portion 51b can be freely inserted into and removed from the support cylinder portion formed on the base plate portion 22. A downward cylinder device 5 is provided between the upper end of the cover plate portion 24.
4 is provided to act on the cylinder rubber receiver 33 from above, and a compression spring 55 is interposed between the horizontal plate portion 28a side and the lower surface of the cylinder rubber receiver 33 to bias the support shaft 27 upward. are doing. Here, the idling roller with which the brake body 52 can freely come into contact is indicated by 11a.

As shown in FIG. 2, the other idle roller 11B is attached to the upper end of the bracket 17 via the roller shaft 15 and the fixture 16, and the lower end of the bracket 17 is engaged with the guide portion 4B. At the same time, by screwing the bolt 18 passed through the middle into the nut body 5B, the side frame IB is fixed.
Fixed.

The conveyance path N160 consisting of the above groups of idle rollers 11A, 11B, and 11a is divided into a plurality of zones in the direction of its path. That is, in this embodiment, as shown in FIG. 1, the zone is divided into seven zones A to G in order from the upstream side to the downstream side. In each zone A to G, a braking device 50 is provided facing at least one idle roller 11a, and a transmission device 50 is provided facing the remaining idle rollers 11A. 2
0 is set. The zones A to G are connected and separated separately, and a valve 61 is provided to reversibly connect and separate the braking device 50 and the transmission 220 at this time. That is, a three-way electromagnetic valve 61 is connected to the supply/discharge port 63 connected to the cylinder devices 32 and 54 of the transmission device 2o and the brake device 50.
A supply hose 65 from a fluid supply source 64 can be freely connected thereto. The object to be transported 57 is a pallet 58,
It consists of a product 59 placed on this pallet 58,
This does not require the use of the pallet 58. Two zones adjacent in the conveyance direction have objects 57 on the downstream side.
In order to connect and operate the transmission 20 when the operator is absent, the multiple valve 61
A control circuit 70 connected to the control circuit 70 is provided. That is, control devices 71A and 71B correspond to each zone A to G.

71C, 71D, 71E, 71F, 71G are installed,
These control devices 71A to 71G are connected to each other and the power supply device,
72 in series. In each zone B to G except the first standby zone A at the most upstream side, there is a stock detection device 73B.
, 73C, 73D, 73E, 73F,
73G are arranged, and these presence detection devices 73B to 73G
are connected to control devices 71A to 71F in adjacent upstream zones. For example, the inventory detection device 73B is
1A, and 73C is connected to 71B. Each of the control devices 71A to 71G sends control signals 74A, 74B, 7 to the corresponding valve 61 to connect and operate the zone and the upstream zone when the downstream side detection device does not detect the presence of goods.
4C.

It is configured to give 74D, 74E, 74F, and 74G.

Support plates 81 are attached to the upper ends of both side frames IA and IB via bolts and nuts 80, and guide bodies 82 are provided on opposing inner surfaces of these support plates 81.

Reference numeral 83 indicates a cover, 84 indicates an aging power supply device disposed between both groups of idle rollers 11A and 11B, and a current collector 85 is provided on the pallet 58.

Next, a description will be given of the operation of transporting the object 57 in the above embodiment.

Figure 2, Figure 3, Figure 5, and zone C in Figure 1,
D switches the valve 61 to connect the supply/discharge hose 63 to the supply hose 65, and swings the support shaft 27 upward against the downward biasing force of the compression spring 36 due to the upward extension of the cylinder device 32. , the transmission roller 31 is brought into contact with the corresponding reversing roller 11A from below, and the support shaft 2 is moved against the upward biasing force of the compression spring 55 due to the downward extension of the cylinder device 254.
7 downward, and as shown in FIG.
is separated from the corresponding reversing roller 1ta. At this time, the chino 45 is constantly driven by the motor 49, and therefore all the passive silver wheels 30 meshing with the chino 45 are rotating around the support shaft 27. Furthermore, the transmission roller 31 forcibly rotates the group of idle rollers 11A by contacting the lower part of the outer circumference of the idle rollers 11A. As a result, the conveyed object 57 on the conveyance path 60 is supported between both groups of idle rollers 11A and 11B, receives conveyance force due to forced rotation of the group of idle rollers 11A on the blade side, and has both sides guided. While being guided by the body 82, this transport path F! ? 160.

At this time, the braking body 52 of the braking device 50 is separated from the idling roller 11a as described above, and therefore no braking action is occurring, and the corresponding idling roller 11a
will rotate idly due to the movement of the pallet 58.

For example, as shown in zones A, B, E to G in Figure 1,
By switching the valve 61 to open the supply/discharge hose 63, the cylinder device 54 is opened and the support shaft 27 is swung upward by the upward biasing force of the compression spring 55, as shown in FIG. 52 can be brought into contact with the corresponding reversing roller 11a from below, and the idle rotation of the idle roller 11a can be prevented, thereby applying a brake to the conveyed object 59 to prevent its conveyance. When the brake body 52 is brought into contact with the brake body 52 in this manner, the cylinder device 32 of the transmission device 20 is also inactive, and the downward biasing force of the compression spring 36 pushes the support shaft 27
is swung downward, the transmission roller 31 is separated from the idle roller 11A as shown by the imaginary line Q in FIG. 5, and the group of idle rollers 11A is made non-driven.

The roller conveyor consisting of a pair of idling rollers 11A and 11B basically conveys the conveyed object 57 as described above and applies a brake, but in reality the load detecting devices 73B to 73G Conveyance fli'J is controlled by switching the valve 61 based on detection or non-detection.

That is, when there are objects 57 in all zones A to G, these objects 57 are detected by the object detection device 73.
Detected from B to 73G. As a result, as described above, the transmission roller 31 is separated from the idle roller 11A and becomes non-driven, and the braking body 52 comes into contact with the idle roller 11a, so that each zone A to G receives a braking action. In this state, power is supplied from the power supply device 84 to the pallet 58 side via the current collector 85, and the product 59 is aged.

After the intended aging work has been completed, the objects 57 in the most downstream zone G are carried out. Then, since the detection signal from the inventory detection device 73G in zone G disappears,
In other words, zone F and zone G are adjacent in the conveyance direction, since there is no conveyed object 57 in zone G on the downstream side.
At the same time, a control signal 74F is output from the control device 71F corresponding to zone F to the valve 61, and at the same time, a control signal 74G is output from the control device 71G corresponding to zone G to the valve 61.
As a result, both valves 61 connect the supply hose 65 to the supply/discharge hose 6.
It will automatically switch to connect to 3. Therefore, both zones F.

At G, the braking body 52 moves away and the transmission roller 3
1 moves into contact and enters the driving state, so that the target 1 in zone F
11 articles 57 will be conveyed to zone G.

The conveyed object 57 is carried into zone G and the object presence detection device 73G
As a result, this zone G becomes non-driven, and the braking body 52 acts on the idle roller 11a to stop the conveyed object 5.
7 will be subjected to a braking action.

Further, as the transported object 57 is carried out to zone G, the detection signal from the presence detection device 73F of zone F disappears, and as a result, zone E and zone F are brought into the driving state in the same way as described above, and the zone The transported object 57 of E is transported to zone F. By repeating such operations, the objects 57 on the transport path 60 can be sequentially transported between the zones. Note that FIG. 1 shows a case where an object 57 in zone C is being transported to zone D.

Effects of the Invention According to the present invention having the above configuration, only one system of piping is required from the valve to each cylinder device, thereby reducing production costs and minimizing piping errors. Furthermore, the valve can be of a three-way type, which can reduce costs.

Furthermore, in addition to the electromagnetic type valve, a mechanical type valve that is inexpensive and does not require wiring can be adopted.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic side view illustrating piping and control, Fig. 2 is a longitudinal sectional front view, Fig. 3 is a longitudinal sectional front view of the transmission unit, and Fig. 4 is a brake diagram. FIG. 5 is a longitudinal sectional front view of the device section, and a partially cutaway side view of the main part. 1... Main body frame, 11A, 11B, 11
a... Idle roller, 17... Bracket, 20...
・Transmission gear! , 21... Support frame, 27... Support shaft, 30
... Passive silver ring (rotating passive body), 31... Transmission roller (transmission body), 32... Cylinder device, 36... Compression spring, 44... Drive device, 45... Cheno, 49・
...Motor, 50... Braking device, 52... Braking body,
54... Cylinder device, 55... Compression spring, 57...
...To be transported, 58...Pallet, 59...Product,
60... Conveyance path, 61... Valve, 63... Supply/discharge hose, 64... Fluid supply source, 71A to 71G... Control device, 73B to 73G... Inventory detection device, 84・・・
- Power supply device, 85... collector, A to G... zone. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A group of idle rollers for conveyance are arranged on the main body frame side,
The idling roller group is divided into a plurality of zones in the conveying direction, a transmission device is disposed below the idling roller, and a braking device is disposed below at least one idling roller in each zone. , the transmission device has a cylinder device that brings the transmission body integrated with the rotating passive body into contact with the idling roller against elastic force, and the braking device causes the braking body to idly rotate against the elastic force. A roller conveyor characterized in that it has a cylinder device that is moved away from the rollers, and these cylinder devices are connected to a fluid supply source through a common valve for each group.