JPH0643049Y2 - Roller conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention is used, for example, when a work piece is conveyed via a pallet and a desired work is performed on the work piece in the conveying path. Roller conveyor.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, a structure disclosed in, for example, JP-A-57-160807 is provided.
In this conventional structure, a large number of rollers are provided on a main body frame (parallel rails) so as to freely rotate to form a conveyance path, and a case is provided on the main body frame side via a support bracket or the like. 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 lower peripheral portions of a pair of adjacent rollers are integrally rotatably provided on the pin, and the case side The drive chain supported and guided by the sprocket is engaged with the sprocket. A diaphragm for moving the pin up and down is provided between the case and the pin.

According to this conventional type, the drive chain is driven by a drive mechanism (not shown), and the wheel is rotated by the drive chain via the sprocket, and the rotation of the wheel is transmitted to the pair of rollers in contact with each other. Thus, the object to be conveyed is conveyed on the conveying path by the rotation of the roller group. The pressure controller controls the supply / discharge of each diaphragm from the pressure source, and the pins are moved up and down to switch 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. Thus, the conveying force to the conveyed objects is cut off so that the conveyed objects do not collide with each other.

According to the above conventional type, when the pressure source, that is, the air supply device is located at the conveyor installation destination such as a factory, this air supply device is used. In this case, the air pipe is placed on the floor surface. It has to be constructed in such a way that the work is troublesome and the floor surface is complicated. Also, by arranging the air supply device at the conveyor installation location or a separately manufactured air supply device near the roller conveyor, the above-mentioned air piping problem can be solved, but in this case, an arrangement space is secured. It is necessary and expensive when separately manufactured.

An object of the present invention is to provide a roller conveyor in which the air supply device can be efficiently set in advance on the body frame side, and the compressor is operated by the drive part of the drive device.

Means for Solving the Problems In order to achieve the above object, the roller conveyor of the present invention is
A large number of idler roller groups are arranged on the main body frame side, and a transmission device that is connectable and detachable to these idler rollers is provided, and a control device for utilizing air that connects and disconnects these transmittal devices is provided. The compressor of the air supply device connected to the braking device is interlockingly connected to the drive unit of the interlocking drive device.

According to the configuration of the present invention, each transmission can be rotated by driving the drive portion of the drive device, and therefore the idler roller can be forced by connecting and disconnecting the transmission under the control of the braking device. It can be rotated or stopped. Further, the compressor of the air supply device can be driven by the rotational driving force of the drive unit, and thus compressed air of the body can be supplied to the control device side.

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

Reference numeral 1 is a main body frame having a cross-sectional shape.
B and a base frame 1C connecting the lower parts of the side frames 1A and 1B, and is installed at a predetermined height on the floor 3 via a plurality of legs 2 connected to the base frame 1C. It Both sides frame
L-shaped guide portions 4A, 4B are formed on the inner surfaces of 1A, 1B facing each other, and dovetail groove portions 6A, 6B for allowing sliding of the nut bodies 5A, 5B are further formed on the upper portions. 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 11A,
The 11B group is arranged so as to be located inside the both-side frames 1A and 1B. Here, one idler roller group 11A is unitized with the transmission device 20 or the braking device 50. Ie transmission 20
As shown in FIGS. 5 and 7, the case-shaped support frame 21 made of resin is used as a main body, and the lower end of the substrate portion 22 is fitted to the guide portion 4A. By screwing the passed bolt 23 into the nut body 5A, the position can be freely changed (slipped) in the frame length direction and can be fixed at the changed position. The lower end portion of the cover plate portion 24 continuously provided from the inner surface of the lower half of the substrate portion 22 toward the inside is connected by the connecting plate portion 25. Further, a bearing hole is formed at the lower end of the substrate 22.
26 is formed, and the 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.
The resin-made L-shaped plate portion 28 is provided between the free ends of the cover plate portion 24.
Is attached by inserting, and the outer end of the support shaft 27 is fitted into a vertical recess 29 formed in the vertical plate of the L-shaped plate portion 28.
The vertical swing range of the support shaft 27 is restricted. A passive chain wheel 30 is rotatably attached to the support shaft 27, and a transmission roller 31 is externally fitted to a protruding boss portion of the passive chain wheel 30 so that both of the rollers 30, 30
Is freely rotatable. The transmission roller 31 is made of urethane rubber, and the outer periphery of the transmission roller 31 is connectable and separable (abuttable and separable) to the lower outer peripheral portion of the idler roller 11A. The cylinder device 32 that uses air to disconnect the connection is
It is interposed between the cylinder rubber receiver 33 attached to the outer end of the and the horizontal plate of the L-shaped plate portion 28. Further, a receiving plate 35 is continuously connected inward from the upper end of the vertical plate of the L-shaped plate portion 28 via a bolt 34, and a supporting shaft is provided between the lower surface of the receiving plate 35 and the upper surface of the cylinder rubber receiver 33. A compression spring 36 that presses and urges 27 is interposed. The transmission device 20 is configured by the above 21 to 36.

A bracket 37 extending upward is attached to the outer surface of the L-shaped plate portion 28 via a bolt 38.
The idler roller 11A is mounted between the upper end of the base plate 22 and the upper end of the base plate 22. That is, the idler roller 11A is fitted onto the roller shaft 12 so as to be freely rotatable, and the washers 13 are provided on both sides with collars.
14 is fitted. Then, a through hole 39 is formed in the upper portion of the base plate portion 22, and an upwardly opening locking groove 40 is formed in the upper portion of the bracket 37. Therefore, by inserting one end of the roller shaft 12 into the through hole 39, dropping the other end into the locking groove 40 from above, and fixing the support 41 externally fitted to the other end to the bracket 37 with the screw 42. The idle roller 11A can be attached.

As shown in FIGS. 1 and 3, a driving device 44 interlocked with each transmission device 20 includes a chain 45 that meshes with each passive chain wheel 30, a driving chain wheel 46 that stretches the chain 45, and a driven chain wheel. 47, a guide chain wheel 48, and a motor (drive section) 49 interlockingly connected to the drive chain wheel 46 via a drive shaft 49a, 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 parts will be described below. That is, as shown in FIGS. 6 and 7, a non-passive chain wheel 51 is attached to the support shaft 27 in a freely rotatable manner, and a urethane rubber braking body 52 is attached to the protruding boss portion of the non-passive chain wheel 51. It is stuck. The non-passive chain ring
Reference numeral 51 is a toothless shape, and substantially half of the toothless portion 51a is opposed to the chain 45, and a stopper body 53 that engages with the tooth portion of the remaining toothed portion 51b is formed on the substrate portion 22 as a support cylinder portion. Can be inserted and removed freely. Here, the idle roller on which the braking body 52 can freely abut is shown by 11a, and the cylinder device for moving the support shaft 27 upward is shown by 54.

As shown in FIG. 4, the other idler 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, the bolt 18 passing through the middle is screwed into the nut body 5B to be fixed to the side frame 1B.

A transport path 60 composed of the above-mentioned idle rollers 11A, 11B, and 11a.
Are divided into a plurality of zones in the route direction. That is, in the embodiment, as shown in FIGS. 1 to 3, in order from the upstream side to the downstream side, the first standby zone A, the first work zone B, the second standby zone C, the second work zone D, and the first standby zone A. It is divided into a storage zone E, a second storage zone F, and a third storage zone G. In each zone A to G, the braking device 5 faces at least one idler roller 11a.
0 is provided, and the transmission device faces the remaining idler roller 11A.
20 are provided. Each zone A to G is separately connected and separated, and at that time, a control device 61 for air utilization is provided which connects and separates the braking device 50 and the transmission device 20 as much as possible.
That is, the first connected to the cylinder device 32 group of the transmission 20
The supply / discharge hose 62 and the second supply / discharge hose 63 connected to the cylinder device 54 of the braking device 50 are connected to a 5-port electromagnetic valve device 64.
Supply hose 65 from the air supply device (described later) via
It is reversibly connectable to. 66 is a regulator and 67 is a silencer. The transported object 57 is a pallet
It consists of 58 and the work piece 59 placed on this pallet 58, but it does not need to use the pallet 58. Two zones adjacent to each other in the transport direction are in the downstream zone.
Each valve device to allow transmission 20 to engage when 57 is absent.
A control circuit 70 connected to 61 is provided. That is, the control devices 71A, 71B, 71C, 71D, 71E, 71F, corresponding to the zones A to G,
71G is provided, and these control devices 71A to 71G are connected to each other and to the power supply device 72 in series. The presence detection device is installed in each zone B to G except the first standby zone A which is the most upstream.
73B, 73C, 73D, 73E, 73F, 73G are disposed, and these in-load detection devices 73B to 73G are control devices 71A to 7 in the adjacent upstream side zones.
It is connected to 1F. 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 71A ~ 71G, when the downstream load detection device is not detected, to connect the current zone and the upstream zone, to the corresponding valve device 61 control signal 74A, 74B, 74C. , 74D, 74E, 74F, 74
It is configured to give G. The above 62 to 67 and the control circuit 70 constitute a control device 61 for air use.

The presence detection devices 73B to 73G include a reflecting mirror and a photoelectric switch. That is, as shown in FIG. 4, one side frame 1A
A holding plate that extends upward through the bolts and nuts 75 on the outer surface of the
A reflecting mirror 77 is attached to the upper part of the holding plate 76 while providing the 76. Here, the reflecting mirror 77 is set so as to face the lower inner surface side of the other side frame 1B. A switch bracket 78 is attached to the lower inner surface side of the other side frame 1B,
A photoelectric switch 79 is attached to the switch bracket 78 so that the angle can be changed.

A support plate 81 is attached to the upper ends of both side frames 1A and 1B via bolts and nuts 80, and guide bodies 82 are provided on the inner surfaces of the support plates 81 facing each other. Reference numeral 83 indicates a cover, 84 walls and other structures.

As shown in FIGS. 1 to 3, the motor 49 is installed on a support frame 85 which is integrated with the lower portion of the main body frame 1, and an air supply device is provided on the support frame 85.
86 is installed. This air supply device 86 is a compressor
87 and an air tank 89 communicating with the same via a communication pipe 88, and the supply hose 65 is connected to the air tank 89. The input shaft 87a of the compressor 87 is interlockingly connected to the drive shaft 49a of the motor 49 via a winding transmission device 49.

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

Zones C and D in FIGS. 4, 5, 7 and 3
Switches the valve device 61 so as to connect the first supply / discharge hose 62 to the supply hose 65, and swings the support shaft 27 upward against the pressing biasing force of the compression spring 36 due to the expansion of the cylinder device 32. The transmission roller 31 is brought into contact with the corresponding idler roller 11A from below. At this time, the motor 49 is being driven, and therefore the chain 45 is always driven. Further, the rotation of the motor 49 drives the compressor 87 via the winding transmission device 90, and the compressed air generated thereby is stored in the air tank 89 and is press-fitted into the supply hose 65. As mentioned above, the chain 45 is always driven, and therefore the chain 45
All the passive chain wheels 30 meshing with are rotating around the support shaft 27. Further, the transmission roller 31 is in contact with the lower portion of the outer periphery of the idler roller 11A, thereby forcibly rotating the idler roller 11A group. As a result, the transferred object 57 on the transfer path 60 is
While being supported between the groups of both idling rollers 11A and 11B, and receiving the conveying force by the forced rotation of the group of idling rollers 11A on one side, both side surfaces are guided by the guide body 82, and on this conveying path 60. Will be transported in. At this time, the second supply / discharge hose 63 is opened, and the cylinder device 54 is inoperative. Therefore, the support shaft 27 is swung downward by the pressing force of the compression spring 36, as shown in FIG. Further, the braking body 52 is separated from the idler roller 11a. 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. 3, the valve device 64 is switched to connect the supply hose 65 to the second supply / discharge hose 63, and the cylinder device 54 is extended as shown in FIG. The support shaft 27 is swung upward against the pressing biasing force of the compression spring 36 and brought into contact with the idler roller 11a corresponding to the braking body 52 from below, whereby the idler roller 11a moves 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 shown by the phantom line Q in FIG. 7, and the idler roller 11A group is made non-driven.

In the presence detection devices 73B to 73G shown in FIG. 4, the red light projected from the photoelectric switch 79 is reflected by the reflecting mirror 77. Here, when there is no object to be transported 57, the reflected light beam enters the photoelectric switch 79 and becomes a non-detection state. And the transported object 57
If there is a red light, the red light is blocked by the transported object 57 and does not reach the reflecting mirror 77, and since there is no reflected light beam, the photoelectric switch 79 is detected.

A roller conveyor consisting of a pair of idle rollers 11A, 11B basically carries the object to be carried 57 as described above,
Then, the brake is applied, but in actuality, the control device 61 switches the valve device 64 based on the detection and non-detection of the presence detection devices 73B to 73G, whereby the conveyance control is performed.

That is, as shown by the phantom lines in FIGS. 1 and 2, when the transported objects 57 are loaded in all the zones A to G, these transported objects 57 are detected by the loaded detection devices 73B to 73G. There is.
As a result, as described above, the transmission roller 31 is separated from the idler roller 11A and is not driven, and the braking body 52 contacts the idler roller 11a so that the zones A to G are subjected to the braking action. In this state, the worker 9 from the side opposite to the side on which the drive device 44 is arranged, that is, from the outside of the idling roller 11B group.
Processing work by 0 is performed. This is done for the work piece 59 that is stationary in both work zones B and D.

After the desired work is completed, the transported object 57 in the third storage zone G is removed. Then, since there is no detection signal from the load detection device 73G in the third storage zone G, that is, the second storage zone F and the third storage zone G which are adjacent to each other in the transport direction are covered by the third storage zone G on the downstream side. Since the transported object 57 is absent, the control device 71F corresponding to the second storage zone F outputs the control signal 74F to the valve device 61, and at the same time, the control device 71G corresponding to the third storage zone G outputs the valve device. A control signal 74G is output to 64, which causes both valve devices 64 to automatically switch to connect the supply hose 65 to the first supply / drain hose 62. Therefore, in both zones F and G, the braking body 52 moves away and the transmission roller 31 abuts to be in a driving state, whereby the transported object 57 in the second storage zone F is moved to the third position.
It will be transported to the storage zone G. Transported object 57
Is loaded into the third storage zone G and the presence detection device 73G
As a result, the third storage zone G becomes non-driving, and the braking body 52 acts on the idler roller 11a so that the transported object 57 receives the braking action. Further, since the transported object 57 is carried out to the third storage zone G, the detection signal from the load detection device 73F in the second storage zone F disappears, which causes the first storage zone E and the second storage zone E to operate in the same manner as described above. The storage zone F and the storage zone F are driven to move the transported object 57 in the first storage zone E to the second position.
Transport to storage zone F. By repeating such operations, the transported object 57 on the transport path 60 can be sequentially fed between the zones. Note that FIG. 3 shows a case where the transported object 57 in the second standby zone C is transported to the second work zone D.

Advantageous Effects of Invention According to the present invention having the above-described structure, each drive device can be rotated by driving the drive part of the drive device. Therefore, by connecting and disconnecting the drive device under the control of the control device, The rolling roller can be forcibly rotated to carry the transported object, and the rotation can be stopped to stop the transportation. Further, the compressor of the air supply device can be driven by the rotational driving force of the drive unit, and a predetermined compressed air can be supplied to the control device side. As described above, according to the present invention, the air supply device can be efficiently set in advance on the main body frame side, the problem due to the air piping can be eliminated, and it is not necessary to secure a space for arrangement on the floor side. Since the drive source of the air supply device can also be used as the drive device, the air supply device can be simplified and reduced in price.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a partially cutaway side view of the whole, Fig. 2 is a plan view of the same, Fig. 3 is a side view for explaining piping and control, and Fig. 4 is a vertical section. Front view, FIG. 5 is a vertical sectional front view of the transmission device portion, and FIG. 6 is a vertical sectional front view of the braking device portion,
FIG. 7 is a partially cutaway side view of the main part. 1 ... Main body frame, 11A, 11B, 11a ... Idler roller, 20
...... Transmission device, 27 …… Spindle, 30 …… Passive chain wheel, 31 …… Transmission roller, 32 …… Cylinder device, 44 …… Driving device, 45 ・ ・ ・
… Chain, 49 …… Motor (drive unit), 49a …… Drive shaft, 5
0 …… Brake device, 51 …… Non-passive chain wheel, 52 …… Brake, 53
…… Stopper body, 54 …… Cylinder device, 57 …… Conveyed object, 58 …… Pallet, 59 …… Processed object, 60 …… Conveyance path, 61 …… Control device, 62 …… First supply / discharge hose , 63 …… second supply / discharge hose, 64 …… valve device, 65 …… supply hose, 70…
... Control circuit, 71A to 71G ... Control section, 73B to 73G ... Availability detection device, 74B to 74G ... Control signal, 85 ... Support frame,
86 …… Air supply device, 87 …… Compressor, 87a …… Input shaft, 89 …… Air tank, 90 …… Winding transmission device, A ……
1st standby zone, B ... 1st work zone, C ... 2nd standby zone, D ... 2nd work zone, E ... 1st storage zone, F ... 2nd storage zone, G ... 3rd Storage zone.

Claims (1)

[Scope of utility model registration request] 1. A large number of idler rollers are provided on the main body frame side, a transmission device that is connectable and detachable to these idler rollers is provided, and an air-use control device that connects and disconnects these drive devices is provided. A roller conveyor characterized in that a compressor of an air supply device connected to the control device is interlockingly connected to a drive unit of a drive device interlocking with each transmission device.