JP2687032B2 - Roller conveyor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor used, for example, when conveying a workpiece through a pallet.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, for example, a structure disclosed in Japanese Patent Application Laid-Open No. 57-160807 has been provided. In this conventional structure, a large number of rollers are provided only freely on a main body frame (parallel rails) to form a transport path,
Then, a case is provided on the body frame side via a support bracket or the like. The case is provided with a pin along the axis of the roller, and a wheel and a sprocket that can simultaneously come into contact with the outer peripheral lower portions of a pair of adjacent rollers are integrally rotatably provided on the pin. A drive chain, which is supported and guided, is engaged with the sprocket. A diaphragm is provided between the case and the pin to move the pin up and down.

According to this conventional type, a wheel is rotated by a drive chain via a sprocket, and the rotation of the wheel is transmitted to a pair of rollers that are in contact with each other. To be transported. By controlling the supply and discharge of the diaphragm and moving the pins up and down, the mode is switched between the drive mode in which the wheel is in contact with the roller and the non-drive mode in which the wheel is separated from the roller, and transport to the transported object. The force is cut off, and the transported objects are controlled so as not to collide.

Problems to be Solved by the Invention According to the above conventional type, when handling a conveyed object having a large width, a long and heavy roller must be arranged, and accordingly a strong and large body frame is provided. Will be required. In addition, since the weight of the roller becomes large, the driving force via the wheels becomes large, and strong inertial rotation occurs when the drive is stopped.Therefore, in order to stop the transported object accurately, many stoppers are required. Equipment is required.

The object of the present invention is to make it possible to reduce the weight and size of the roller group and the driving device even when handling an object to be conveyed having a large width, and to arrange the roller group at a suitable pitch according to the length of the object to be conveyed. In addition, it is another object of the present invention to provide a roller conveyor in which another device or the like can be arranged in the central portion in the width direction of the conveyor.

Means for Solving the Problems In order to achieve the above object, a roller conveyor of the present invention is a transmission device in which a pair of left and right idler roller groups are arranged on the main body frame side, and the idler rollers on one side can be connected and separated. When,
A drive device interlocking with each transmission device is provided, the main body frame has a pair of left and right side frames, and guide portions along the frame length direction are formed on the inner side surfaces of the side frames facing each other, The transmission device includes a support frame attached to a guide portion of a side frame on one side, a passive body and a transmission body vertically movably attached to the support frame, and a vertical movement device. The rolling roller is attached to the support frame above the transmission body, the idle roller on the other side is supported by the bracket, and the bracket is attached to the guide portion of the side frame on the other side.

According to such a configuration of the present invention, by connecting the transmission body to the idler roller on the one side by the upward movement of the vertical movement device, the driving force of the drive device is changed from the passive body to the idler roller on the one side. This is transmitted to the rollers to forcibly rotate the one idle roller group. Thus, the object to be conveyed supported by the left and right idler roller groups can be conveyed by the forced rotational force of one idler roller group. Then, by lowering the vertical movement device to separate the transmission from the idler roller on one side, the driving force of the drive device is not transmitted to the idler roller on one side, and the idler roller group on one side is forcedly rotated. Will not be done. Thereby, the transported object can be stopped at a predetermined position. By repeating such an operation, the transported object can be sequentially fed. By dividing the idler rollers into left and right groups, the idler rollers of both groups can be made short and lightweight, and the drive unit and the main body frame can be made compact even when handling a wide object to be conveyed. Further, the positions of the left and right support frames are changed in the frame length direction via the respective guide portions, so that the roller groups can be arranged at a suitable pitch according to the length of the transported object.

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

1 is a main body frame having a sectional shape, and a pair of left and right side frames 1
A, 1B and the base frame 1 connecting the lower parts of these side frames 1A, 1B
C and is installed at a predetermined height on the floor via a plurality of legs 2 connected to the base frame 1C. L-shaped guide portions 4A and 4B are formed on the inner surfaces of the side frames 1A and 1B, which face each other, in the frame length direction.
Dovetail grooves 6A, 6B are formed to allow sliding of 5A, 5B. A pair of guide rails 9 and 10 are arranged in the frame length direction on the inner surface side of the lower portion of one side frame 1A via mounting portions 7 and 8, respectively.

A pair of left and right idler rollers 11 is provided on the body frame 1 side.
The groups A and 11B are disposed so as to be positioned inside the side frames 1A and 1B.
Here, one idler roller 11A group is unitized with the transmission device 20 or the braking device 50. That is, the transmission 20
As shown in FIG. 2 and FIG. 4, the case-shaped support frame 21 made of resin is used as a main body, and the lower end of the vertical substrate portion 22 is fitted to the guide portion 4A, and the substrate portion 22 is By screwing the bolt 23 into the nut body 5A through the middle of,
The position can be freely changed (slid) in the frame length direction and fixed at the changed position. The cover plate 24 continuously connected inward from the lower half inner surface of the substrate 22 is connected at its lower end by a connection plate 25. Further, a bearing hole 26 is formed in a lower portion of the substrate portion 22, and an inner end of a support shaft 27 in the left-right direction is fitted into the bearing hole 26 so that the support shaft 27 can swing up and down. Grooves 24a, which are open on opposite sides, are formed in the lower part of both cover plate parts 24 in the left-right direction. The resin-made L-shaped plate 28 composed of the horizontal plate portion 28a and the vertical plate portion 28b is
After inserting both edges of the support frame 2 into the groove 24a,
Attached to one side. The outer end of the support shaft 27 is fitted into a vertical recess 29 formed in the vertical plate portion 28b to regulate the vertical swing range of the support shaft 27. A passive chain ring 30 which is an example of a passive body is rotatably mounted on the support shaft 27, and a transmission roller 31 which is an example of a transmission body is externally fitted to a protruding boss portion of the passive chain ring 30 so that both of them are fitted. 30, 31 can be rotated integrally. The transmission roller 31 is made of urethane rubber, and its outer periphery is freely connected to and separated from the lower part of the outer periphery of the idler roller 11A (contact and separation is possible). An air-using cylinder device (an example of an up-and-down moving device) 32 for connection and disconnection includes a cylinder rubber receiver 33 attached to the outer end of a support shaft 27 and a horizontal plate portion of an L-shaped plate 28.
It is interposed between 28a. Furthermore, the vertical plate part 2 of the L-shaped plate 28
From the middle of 8b, a receiving plate 35 is continuously provided inward via a bolt 34, and a compression for pressing down and biasing the support shaft 27 between the lower surface of the receiving plate 35 and the upper surface of the cylinder rubber receiver 33. A spring 36 is interposed. The transmission device 20 is configured by the above 21 to 36.

The vertical plate portion 28b of the L-shaped plate 28 has the same height as the substrate portion 22, and the idle roller 11A is mounted between the upper ends of these 28b and 22. That is, the idler roller 11A is composed of a small-width roller portion 12a and a large-width boss portion 12b, and is fitted around the roller shaft 13 through the boss portion 12b so as to be freely rotatable, and a washer 14 is fitted on both sides. ing. Then, at the upper end of the substrate portion 22, an outer locking recess 37 which is open inside is formed, and the vertical plate portion 28 is formed.
An inner locking recess 38 that is open to the outside is formed at the upper end of b. Therefore, the idle roller 11A can be mounted by engaging both ends of the roller shaft 13 with the both locking recesses 37 and 39.

As shown in FIG. 5, a driving device 44 interlocked with each transmission device 20 includes a chain 45 meshing with each passive chain wheel 30 and this chain 45.
Drive chain wheel 46, driven chain wheel 47, guide chain wheel 48 for extending 45
And a motor 49 linked to the drive chain wheel 44, and the chain 45 is supported and guided by the guide rails 9 and 10.

The braking device 50 has the same configuration as the transmission device 20, and only different portions will be described below. That is, as shown in FIGS. 3 and 4, a non-passive chain wheel 51 is attached to the support shaft 27 in a freely rotatable manner, and a braking body 52 made of urethane rubber is attached to the protruding boss portion of the non-passive chain left side 51. It is stuck. The non-passive chain ring 51 has a toothless shape.A substantially half toothless portion 51a is opposed to the chain 45, and a stopper body 53 that is engaged between the teeth of the remaining toothed portion 51b is formed on the substrate portion 22. It can be inserted into and removed from the formed support cylinder. Here, the idler roller 11a with which the braking body 52 can come into contact is shown, and the cylinder device for moving the support shaft 27 upward is shown with 54.

As shown in FIG. 1, the other idler roller 11B is attached to the upper end of a bracket 17 via a roller shaft 15 and a fixture 16, and the lower end of the bracket 17 is a guide portion.
The nut 18 is engaged with the nut 4B, and is fixed to the side frame 1B by screwing the bolt 18 passing through the middle to the nut body 5B.

The transport path 60 composed of the above-mentioned idle roller 11A, 11B, 11a group
Is divided into a plurality of zones in the direction of the route. That is, in the embodiment, as shown in FIG. 5, the zone is divided into seven zones A to G in order from the upstream side to the downstream side. In each of the zones A to G, at least one idle roller 11
A braking device 50 is provided opposite to a, and the remaining idle roller 1
A transmission 20 is provided facing 1A. Each zone A
G are separately connected and moved, and at this time, a valve device 61 for reversibly connecting and disconnecting the braking device 50 and the transmission device 20 is provided. That is, the first supply / discharge hose 62 connected to the group of cylinder devices 32 of the transmission device 20 and the cylinder device 54 of the braking device 50
And a second supply / discharge hose 63 connected to a supply hose 65 from a supply source 64 via a five-port electromagnetic valve device 61 so as to be reversibly connectable. The transferred object 57 is a pallet 58
And a product 59 placed on this pallet 58,
This may not use pallets 58. Two zones adjacent to each other in the transport direction are provided with a control circuit 70 connected to each valve device 61 so that the transmission device 20 can be connected to the downstream zone when the transported object 57 is absent. That is, each zone A ~
Control devices 71A, 71B, 71C, 71D, 71E, 71F, 71G are arranged corresponding to G, and these control devices 71A to 71G are connected to each other and to the power supply device 72 in series. In addition, the presence detection devices 73B, 73 are provided in the zones B to G except the first standby zone A which is the most upstream.
C, 73D, 73E, 73F, 73G are installed, and these presence detection devices 73B
73G are connected to the control devices 71A to 71F in the adjacent upstream zones. For example, the presence detection device 73B is connected to the control device 71A, and the 73C is connected to 71B. And each control device 71
A ~ 71G, when the downstream load detection device is not detected, to connect the zone and the upstream zone, to the corresponding valve device 61 control signal 74A, 74B, 74C, 74D, 74E, It is configured to give 74F and 74G.

A support plate 81 is attached to the upper ends of both side frames 1A and 1B via bolts and nuts 80, and a guide body 82 is provided on the opposing inner surfaces of the support plates 81. Reference numeral 83 denotes a cover, 84 denotes an aging power supply device disposed between the idler rollers 11A and 11B, and a pallet 58 is provided with a current collector 85.

Next, the operation of transporting the transported object 57 in the above embodiment will be described.

Zone C of Figures 1, 2, 4 and 5
D switches the valve device 61 to connect the first supply / discharge hose 62 corresponding to the transmission 20 to the supply hose 65,
With the extension of 32, the support shaft 27 is swung upward against the pressing force of the compression spring 36, and the idle roller 11 corresponding to the transmission roller 31 is moved.
A is abutted from below. At this time, the chain 45 is constantly driven by the motor 48, and therefore the chain 45
All the passive links 30 meshing with 45 rotate around the support shaft 27. Further, the transmission roller 31 forcibly rotates the group of idler rollers 11A by being in contact with the lower part of the outer periphery of the idler roller 11A. Thereby, the transported object 57 on the transport path 60 is
Is supported between the two idler rollers 11A and 11B, receives a transport force due to the forced rotation of one idler roller 11A group, and is guided by the guide body 82 on both sides thereof. It will be transported on 60. At this time, the second supply / discharge hose 63 corresponding to the braking device 50 is open,
Since the cylinder device 54 is not in operation, the support shaft 27 is swung downward by the pressing biasing force of the compression spring 36 to separate the braking body 52 from the idle roller 11a as shown in FIG. .
Therefore, no braking action is generated, and the corresponding idler roller 11a idles due to the movement of the pallet 58.

For example, as shown by zones A, B, E to G in FIG. 5, the valve device 61 is switched to connect the supply hose 65 to the second supply / discharge hose 63, and the extension of the cylinder device 54 is performed as shown in FIG. The support shaft 27 is swung upward against the pressing biasing force of the compression spring 36, and its braking body 52 is brought into contact with the corresponding idler roller 11a from below, thereby allowing the idler roller 11a to move freely. It is possible to prevent the roll, so that the transported object 59 can be braked to prevent the transport. When the braking body 52 is brought into contact with the cylinder body 32 in this manner, the first supply / discharge hose 62 is opened and the cylinder device 32 is deactivated, and the pressing force of the compression spring 36 presses the support shaft.
27 is swung downward so that the transmission roller 31 is separated from the idler roller 11A as indicated by an imaginary line Q in FIG. 4, so that the idler roller 11A group is not driven.

The roller conveyor composed of a pair of idler rollers 11A and 11B basically conveys the conveyed object 57 as described above, and performs a braking action, but actually the presence detection devices 73B to 73G Valve device 61 based on detection or non-detection of
Is switched to control the transport.

That is, when the transported objects 57 are present in all the zones A to G, these transported objects 57 are loaded in the load detecting devices 73B to 73B.
3G has been detected. As a result, as described above, the transmission roller 31 is separated from the idler roller 11A and becomes non-driven, and the braking member 52 comes into contact with the idler roller 11a, so that each of the zones A to G
Is being braked. In this state, power is supplied from the power supply device 84 to the pallet 58 via the current collector 85,
Aging is performed on the product 59.

When the desired aging work is completed, the transported object 57 in the most downstream zone is unloaded. Then, since there is no detection signal from the load detection device 73G in the zone G, that is, in the zone F and the zone G which are adjacent to each other in the transport direction, the transported object 57 is absent in the zone G on the downstream side, or the zone F does not exist.
A control signal 74F is output from the control device 71F corresponding to the above to the valve device 61, and at the same time, a control signal 74G is output from the control device 71G corresponding to the zone G to the valve device 61, whereby both valve devices 61 are supplied. The hose 65 automatically switches to connect to the first supply / discharge hose 62. Therefore, in both zones F and G,
As the braking body 52 moves away from the transmission roller 31, the transmission roller 31 comes into contact with the braking roller 52 and is brought into a driving state, so that the transported object 57 in the zone F is transported to the zone G. When the transported object 57 is carried into the zone G and detected by the presence detection device 73G, the zone G becomes non-driving, and the braking body 52 acts on the idler roller 11a to brake the transported object 57. Will be received. Further, since the transported object 57 is carried out to the zone G, the detection signal from the presence detection device 73F in the zone F disappears, whereby the zone E and the zone F are driven in the same manner as described above, The transported object 57 of E is transported to the zone F. By repeating such operations,
The transported object 57 on the transport path 60 can be sequentially fed between the zones. FIG. 5 shows a state in which the transported object 57 in the zone C is being transported to the zone D.

EFFECTS OF THE INVENTION According to the present invention having the above-described configuration, the idling rollers are divided into the left and right groups, so that the idling rollers of both groups can be shortened and reduced in weight even when handling a conveyed object having a large width. ,
The inertial turning force can be weakened, and the drive unit and the main body frame can be downsized. Furthermore, the left and right support frames can be arranged at arbitrary positions in the frame length direction via the respective guide parts, and the roller groups are always arranged at the optimum pitch according to the length of the transported object, that is, the minimum number. In addition to being able to do so, it can be easily and quickly changed to any position. Moreover, the transported object can be stopped at a predetermined position without providing a stopper device, and the pallet or the like need not have a special shape. Further, another device such as a power feeding device can be arranged in the central portion in the width direction of the conveyor, and can be suitably used for various lines such as an aging line.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG.
2 is a vertical sectional front view of the transmission unit, FIG. 3 is a vertical sectional front view of the braking unit, FIG. 4 is a partially cutaway side view of a main portion, and FIG.
The figure is a side view for explaining the piping and control. 1 ... Main body frame, 11A, 11B, 11a ... Idler roller, 17
...... Bracket, 20 …… Transmission device, 21 …… Support frame, 27…
… Support shaft, 30… Passive chain (passive body), 31… Transmission roller (transmission body), 32… Cylinder device (vertical movement device), 44…
… Drive device, 45 …… Chien, 49 …… Motor, 50 …… Brake device, 52 …… Brake body, 54 …… Cylinder device, 57 …… Transported object, 58 …… Pallet, 59 …… Product, 60 ...... Transport route,
61 …… Valve device, 71A to 71G …… Control device, 73B to 73G …… Availability detection device, 84 …… Power supply device, 85 …… Collector, A to G…
…zone.

Claims (1)

(57) [Claims] 1. A pair of left and right idler roller groups are arranged on the main body frame side, and a transmission device connectable and separable to one idler roller and a drive device interlocked with each transmission device are provided, and the main body is provided. The frame has a pair of left and right side frames, and on inner surfaces of the side frames facing each other, guide portions are formed along the length direction of the frame, and the transmission is provided on a guide portion of one side frame. It has a support frame to be attached, a passive body and a transmission body attached to the support frame so as to be movable up and down, and an up-and-down moving device. The idle roller on one side is attached to the support frame above the transmission body, and the other side. The idle roller on the side is supported by a bracket, and the bracket is attached to the guide portion of the side frame on the other side.