JP2884829B2 - Roller conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor used for conveying an object to be processed, for example, via a pallet.

[0002]

2. Description of the Related Art Conventionally, as a roller conveyor of this kind, for example, the structure disclosed in Japanese Utility Model Laid-Open No. 1-1111609 has been provided. In this conventional configuration, the main body frame is composed of a pair of left and right side frames and a base frame connecting lower portions of these side frames. Support frames are provided on the inner surfaces of the side frames opposite to each other, and a conveying roller is disposed between the support frames. A driving body or the like is provided on one side frame side, and a transmission roller which is linked to the driving body and can be connected to and separated from a transport roller is provided on one of the support frames.

[0003]

According to the above-mentioned conventional type, it is necessary to prepare a conveying roller having a length corresponding to the machine width, and the type and amount of the stock are large.
Further, since each transport roller is long and both ends are supported by the support frame, repair or replacement for damage cannot be performed quickly and easily.

An object of the present invention is to provide a roller conveyor which can use a common roller for various machine widths, and which can repair and replace rollers and change the machine width quickly and easily. On the point.

[0005]

In order to achieve the above object, a roller conveyor according to the present invention comprises a main body frame having a pair of left and right sides.
Side frames, connected to the bottom of these side frames and
It is composed of a pair of left and right bars facing each other below
Then, connect the leg to one of the lower bars, and
After moving the other bar with respect to
Doing, freely change the machine width, and according to the machine width changes
The side frames toward and away freely configured, the supporting frame on the inside surface respectively facing each of the two side frames provided, each of these supporting frames, provided freely idle rollers through the roller axes of the right and left directions, whereas A drive device is provided on the side frame, and a transmission device that can be connected to and separated from one of the rollers is provided on the support frame in conjunction with the drive device, and at least one of the rollers is cantilevered on one of the support frames. It is detachably attached via the provided roller shaft.

[0006]

According to the structure of the present invention, a pallet or the like is supported between the left and right rollers, and is conveyed by a driving force of one roller forcedly rotated by a driving device via a transmission. Here, the one roller to which the transmission device is connected and separated is severely damaged such as abrasion with respect to the other roller, but the one roller can be easily attached and detached via a cantilevered roller shaft. The change of <br/> machine width due to adjustment of the main frame is coupled to the leg and the drive unit and the transmission
Move the other bar with respect to one bar provided with etc.
In Rukoto is, rollers can be performed in situ.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 5, reference numeral 1 denotes a body frame, which is a pair of left and right side frames 80A and 80B, and a pair of bars 81A and 81 which are connected to the lower portions of the side frames 80A and 80B and extend inward to face each other vertically.
B and a bracket 82 attached to the free ends of the bars 81A, 81B and freely connectable to the opposing bars 81A, 81B.
A and 82B, and are installed at a predetermined height on the floor via a plurality of legs 40 connected to a lower bar 81A.

In FIG. 1 to FIG. 3, locking grooves 2A, 2A,
2B are formed, and dovetail grooves 4A, 4B for allowing the nut bodies 3A, 3B to slide are formed on the upper part thereof so as to open diagonally upward, and mounting grooves 5A, 5B for the guide bodies 8A, 8B are further formed on the upper end. It is formed to be open inside. On one side frame 80A, a pair of guide rails 10a and 10b are arranged in the lower part of the inner surface side via mounting portions 9a and 9b, respectively, in the frame length direction. The other side frame 80B
Is formed with a low height without an attachment portion or the like.

On the main body frame 1 side, a pair of left and right idler rollers 11A and 11B are disposed inside the side frames 80A and 80B. Here, one idler roller 11A group is unitized with the transmission device 20 or the braking device 50.

As shown in FIGS. 1 and 3, the transmission device 20 has a case-like supporting frame 21A made of resin as a main body, and a lower end of a vertical substrate portion 22 as a locking portion 17A. The nut 2A is engaged with the groove 2A from above, and an obliquely outward contact portion 18A is formed at the upper end of the substrate portion 22. A bolt 23A passed from above through a bolt hole formed in the contact portion 18A is attached to the nut body 3A. By screwing, the position can be freely changed (slid) in the frame length direction and fixed at the changed position.

The lower end of the cover plate 24 continuously connected inward from the lower half inner surface of the substrate 22 is connected 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 L-shaped plate 28 composed of the horizontal plate portion 28a and the vertical plate portion 28b is formed by forming both edges of the horizontal plate portion 28a with grooves.
After being inserted into 24a, it is fixed to the support frame 21A side by fixing.

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 attached to the support shaft 27.
A transmission roller 31 which is an example of a transmission body is provided on a protruding boss portion of
Are externally fitted so that both 30, 31 can rotate integrally. The transmission roller 31 is made of urethane rubber, and its outer periphery is freely connected to and separated from the lower portion of the outer periphery of the idler roller 11A (contact and separation is possible).

A cylinder device 32 using air for connection and disconnection is interposed between a cylinder rubber receiver 33 attached to the outer end of the support shaft 27 and a horizontal plate portion 28a of the L-shaped plate 28. Further, from the middle of the vertical plate portion 28b of the L-shaped plate 28, the bolt 34
A receiving plate 35 is continuously provided inward through a compression spring 36 that presses and biases the support shaft 27 between the lower surface of the receiving plate 35 and the upper surface of the cylinder rubber receiver 33. I have. More than 21
To 36 constitute the transmission device 20.

The idler roller 11A is mounted on the substrate 22.
Is attached. That is, a through hole 12A in the left-right direction is formed in the upper part of the substrate part 22, and a nut installation part 13A whose upper part is open is formed in the middle part of the through hole 12A.
The roller shaft 14A is in the form of a bolt and externally holds the idle roller 11A via a bearing 15A. After inserting the roller shaft 14A in the left-right direction into the through hole 12A from the inside and screwing it into the nut 16A installed in the nut installation portion 13A, the idle roller 11A is provided in a cantilever shape that is not supported inside. The roller shaft 14A is freely rotatable.

As shown in FIGS. 2 and 5, the other idler roller 11B is similarly arranged. That is, the support frame 21B is formed in a vertical case shape with resin, and the lower end thereof is
17B, it is engaged with the locking groove 2B from above, and a slanting outward contact portion 18B is formed at the upper end, and a bolt 23B passed from above through a bolt hole formed in the contact portion 18B.
Is screwed into the nut body 3B so that the position can be freely changed (slid) in the frame length direction and fixed at the changed position.

The other idle roller 11B is mounted on the support frame 21B. That is, a through hole 12B in the left-right direction is formed in the upper part of the support frame 21B, and a nut installation part 13B whose upper part is open is formed in the middle of the through hole 12B.
The roller shaft 14B has a bolt shape and externally holds the idle roller 11B via a bearing 15B. After the roller shaft 14B is inserted from the inside into the through hole 12B with the roller shaft 14B in the left-right direction and screwed into the nut 16B installed in the nut installation portion 13B, the idle roller 11B is provided in a cantilever shape that is not supported inside. The roller shaft 14B is freely rotatable.

As shown in FIG. 6, a driving device 44 interlocked with each transmission device 20 includes a chain 45 that meshes with each passive chain 30 and a driving chain 46, a driven chain 47, It comprises a guide chain wheel 48 and a motor 49 linked to the drive chain wheel 44, and the chain 45 is supported and guided by the guide rails 10a and 10b.

The brake device 50 has the same structure as the transmission device 20, and only different portions will be described below. That is, as shown in FIGS. 3 and 6, a non-passive chain ring 51 is freely rotatably mounted on the support shaft 27, and a urethane rubber braking member 52 is fixed to the protruding boss portion of the non-passive chain ring 51. ing. The non-passive chain ring 51 has a toothless shape, and approximately half of the toothless portion 51a is chained.
A stopper body 53 that is opposed to 45 and is engaged between the teeth of the remaining toothed portion 51b is freely insertable into and removable from the support cylinder formed on the substrate portion 22. Here, the idler roller to which the brake body 52 can freely contact is indicated by 11a, and the cylinder device for moving the support shaft 27 upward is indicated by 54.

As shown in FIGS. 1 to 5, each of the bars 81A and 81B is an extruded product having three dovetails 83 and 84 on the upper and lower surfaces, respectively.
A and 85B are connected to lower portions of the side frames 80A and 80B.
The connecting members 85A, 85B have a pair of front and rear bolt holes 86 in the outer half thereof, and bolts 87 passing through the bolt holes 86 from below are formed at the lower ends of the side frames 80A, 80B. Nut body 89 arranged in dovetail grooves 88A and 88B
A and 89B are fixed to the lower portions of the side frames 80A and 80B by being screwed into the side frames 80A and 80B.

The inner halves of the connecting members 85A and 85B are freely contactable with the upper surfaces of the bars 81A and 81B, and positioning projections 90 are provided from the lower surface thereof so as to be fitted into the dovetails 83 on both upper sides. Have been. Further, a pair of left and right bolt holes 91 in the vertical direction are formed between the two positioning projections 90, and a bolt 92 passed from above through the bolt holes 91 is screwed into a nut body 93 arranged in a central dovetail portion 83. By combining, the base ends of the bars 81A, 81B can be fixed to the connecting members 85A, 85B.

The brackets 82A, 82B are provided with bars 81A,
The free end of 81B has a step surface 94 which can be applied to the end surface and the upper surface or the end surface and the lower surface, and a pair of left and right bolt holes 95 is formed in the inner half. Bolts 96 passed through the bolt holes 95 from above or below are screwed into nuts 97 provided in the central dovetails 83 or 84, so that the free ends of the bars 81A and 81B are respectively bracketed. 82A and 82B can be fixed.

In the outer halves of the brackets 82A and 82B, a vertical bolt hole 98 is formed at the center, and a bolt 99 passed through the bolt hole 98 from below or above is disposed in the central dovetail portion 84 or 83. The brackets 82A and 82B are screwed into the nut body 100 so that the brackets 82A and 82B face each other.
A, 81B can be detachably connected.

As shown in FIG. 5, the transferred object 57 is composed of, for example, an aging pallet 58 and an aging product 59 mounted on the pallet 58. Is provided with an aging device 56. Note that ordinary transport without aging may be performed, and the pallet 58 may not be used for transport.

The transport path 60 composed of the idling rollers 11A, 11B, 11a is divided into a plurality of zones in the direction of the path. That is, in the embodiment, as shown in FIG. 6, 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, a braking device 50 is provided to face at least one idle roller 11a, and a transmission device 20 is provided to face the remaining idle rollers 11A.

Each of the zones A to G is separately connected and moved.
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 cylinder device 32 group of the transmission 20 and the second supply / discharge hose 63 connected to the cylinder device 54 of the braking device 50 are connected via the five-port electromagnetic valve device 61. It is configured to be reversibly connectable to a supply hose 65 from a supply source 64.

The two adjacent zones in the transport direction are provided with a control circuit 70 connected to each valve device 61 so as to connect and move the transmission device 20 when the transported object 57 is not present in the downstream zone. That is, the controller 71A corresponding to each of the zones A to G,
71B, 71C, 71D, 71E, 71F, and 71G are provided, and these control devices 71A to 71G are connected to each other and to the power supply device 72 in series. Each of the zones B to G excluding the first upstream standby zone A is provided with a presence detection device 73B, 73C, 73D, 73E,
73F and 73G are provided, and these presence detecting devices 73B to 73G are provided.
Are connected to the control devices 71A to 71F of the adjacent upstream zone.

For example, the presence detection device 73B is controlled by the control device 71A.
And 73C is connected to 71B. Each of the control devices 71A to 71G sends control signals 74A, 74B, 74C, and 74 to the corresponding valve device 61 to connect and move the zone to the upstream zone when the downstream presence detection device is not detected. 74D, 74
E, 74F, 74G.

To assemble the roller conveyor of the above embodiment, first, the transmission device is mounted on one side frame 80A via the support frame 21A.
20 and the supporting frame 21B is attached to the other side frame 80B.
Is arranged. That is, the support frames 21A and 21B are
A and 17B are engaged with the locking grooves 2A and 2B from above, and bolts 23A and 23B passed from above into bolt holes formed in the contact portions 18A and 18B are screwed into the nut bodies 3A and 3B. Is established.

Next, the idle roller 11 is mounted on one of the support frames 21A.
A and 11a groups are arranged, and the idler rollers 11B group is arranged on the other support frame 21B. This is done by inserting the roller shafts 14A, 14B, which hold the idle rollers 11A, 11a, 11B from outside through the bearings 15A, 15B, from the inside into the through holes 12A, 12B with the left and right directions, and then into the nut installation portions 13A, 13B By screwing to nuts 16A and 16B, cantilever roller shaft
It is freely rotatable via 14A and 14B.

The free ends of the bars 81A, 81B connected to the lower portions of the side frames 80A, 80B via connecting members 85A, 85B and the like are connected to the opposing bars 81A, 81B via brackets 82A, 82B and the like. By doing so, as shown by the solid line in FIG. 5, it is possible to use the machine with the shortest machine width L.

When changing the machine width L in this state, the bolt 99 is first loosened. Then, the side frames 80A and 80B are moved so as to be separated from each other. At this time, the nut body 100 is
It slides in 3,84, so that the separation is stable. Thereafter, by tightening the bolt 99, the machine width L can be changed to a desired long machine width L as shown by a virtual line in FIG. At this time, since the idle rollers 11A, 11a and 11B are separately attached to the left and right side frames 80A and 80B, there is no need to replace them when the machine width is changed. When the machine width L is reduced, the side frames 80A and 80B may be brought closer to each other in the same manner as described above.

Next, the operation of transporting the transported object 57 in the roller conveyor assembled as described above will be described. Figure 1,
3 and FIG. 6, zones C and D are provided by switching the valve device 61 to connect the first supply / discharge hose 62 corresponding to the transmission 20 to the supply hose 65, and by the extension of the cylinder device 32, the compression spring 36
, The support shaft 27 is swung upward against the urging force, and the transmission roller 31 is brought into contact with the corresponding idle roller 11A from below.

At this time, the chain 45 is constantly driven by the motor 49, and therefore, all the passive chain rings 30 meshing with the chain 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 peripheral portion of the idler roller 11A.

As a result, the transferred object 57 on the transfer path 60 is
It 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 on the transport path 60 in a state where both side surfaces are guided by the guide body 77. Will be transported.

At this time, since the second supply / discharge hose 63 corresponding to the braking device 50 is open and the cylinder device 54 is not operated, the support shaft 27 is swung downward by the pressing force of the compression spring 36. The brake 52 is moved away from the idler roller 11a. Therefore, no braking action is generated, and the corresponding idle roller 11a idles due to the movement of the pallet 58.

For example, as shown by zones A, B, EG in FIG. 6, the valve device 61 is switched to connect the supply hose 65 to the second supply / discharge hose 63, and the compression spring is moved by the extension of the cylinder device 54.
The support shaft 27 is swung upward against the pressing force of 36, and the braking body 52 is brought into contact with the corresponding idler roller 11a from below, thereby preventing idler of the idler roller 11a. Thus, the transported object 59 can be braked to prevent transport.

When the brake body 52 is brought into contact with the cylinder in this manner, the first supply / discharge hose 62 is opened and the cylinder device 32 is inactive, and the support shaft 27 is pressed by the pressing force of the compression spring 36. The swinging roller 11 is swung downward to rotate the idler roller 11 as shown by the imaginary line Q in FIG.
A to separate the transmission roller 31 from the idler roller 11
The group A is deactivated.

While the article 57 is being conveyed in this way, the desired aging process is performed on the aging product 59 via the aging device 56 and the pallet 58. Further, the operator performs various operations on the aging product 59 from the side of the side frame 80B where the roller driving device 55 is not provided.

The roller conveyor composed of the pair of idler rollers 11A and 11B is basically constructed as described above.
And then brake it.
Actually, the conveyance control is performed by switching the valve device 61 based on the detection or non-detection of the presence detection devices 73B to 73G.

That is, the transported objects 57 are set in all the zones A to G.
Are carried, these carried objects 57 are detected by the presence detection devices 73B to 73G. As a result, as described above, the transmission roller 31 is separated from the idler roller 11A and becomes non-driven, and the braking body 52 comes into contact with the idler roller 11a, so that the zones A to G are subjected to the braking action.

In this state, the transported object 57 in the lowermost zone G is unloaded. Then, the loading detection device 73G in the zone G
From the controller 71F corresponding to the zone F, since the detection signal from the controller F is not present, that is, the zone F and the zone G adjacent to each other in the transport direction are absent in the zone G on the downstream side. At the same time that the control signal 74F is output to 61, the control device 71G corresponding to the zone G
A control signal 74G is output to 61 so that both valve devices 61
Automatically switches to connect the supply hose 65 to the first supply / discharge hose 62. Therefore, in both zones F and G, the braking body 52 moves away and the transmission roller 31 abuts and moves to the driving state, so that the transported object 57 in the zone F is moved to the zone G.
To be transported.

When the transported object 57 is carried into the zone G and detected by the presence detection device 73G, the zone G is not driven, and the braking body 52 acts on the idler roller 11a to move the transported object 57. Will be braked. Also, the transferred object
When the zone 57 is carried out to the zone G, the detection signal from the load detection device 73F in the zone F disappears, so that the zone E and the zone F are driven in the same manner as described above, and the zone E is transported. The object 57 is transported to the zone F. By repeating such an operation, the transported object 57 on the transport path 60 can be sequentially fed between the zones. FIG. 6 shows a case where the transported object 57 in the zone C is being transported to the zone D.

[0043]

According to the present invention having the above structure, the pallet or the like is supported between the left and right rollers, and can be conveyed by the driving force of one roller which is forcibly rotated by the driving device via the transmission. Here, the one roller to which the transmission device is connected and separated is severely damaged such as abrasion with respect to the other roller, but this one roller has a cantilevered roller shaft .
It can be easily detached and through, can be quickly and easily for repair or replacement to injury.

Since the rollers are separately mounted on the left and right side frames via the support frames, there is no need to replace the rollers when the machine width is changed. Therefore, a common roller is used for various machine widths. The number and type of stock can be reduced. In addition , when the machine width is changed by adjusting the body frame, the drive unit
In moving the one of the other bar relative to the bar provided Rukoto, the rollers as it is, light can be conducted quickly and easily.

In addition, since the rollers are divided into left and right groups, the idle rollers of both groups can be made shorter and lighter even when handling a wide conveyed object, and the inertia rotational force can be reduced. In addition, it is possible to reduce the size of the driving device and the body frame.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a transmission unit according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the idle roller.

FIG. 3 is a partially cutaway side view of the main part.

FIG. 4 is a vertical sectional front view of the bracket coupling portion.

FIG. 5 is a front view of the whole.

FIG. 6 is a side view illustrating the piping and control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame 2A Locking groove 2B Locking groove 11A Idling roller 11B Idling roller 11a Idling roller 12A Through hole 12B Through hole 14A Roller shaft 14B Roller shaft 16A Nut 16B Nut 17A Locking portion 17B Locking portion 20 Transmission device 21A Support frame 21B Support frame 27 Support shaft 30 Passive chain link 31 Transmission roller 40 Leg 44 Drive device 50 Braking device 70 Control circuit 80A Side frame 80B Side frame 81A Bar 81B Bar 82A Bracket 82B Bracket

Claims (1)

(57) [Claims] 1. A body frame comprising a pair of left and right side frames,
Connects to the lower part of these side frames and extends inward to face each other up and down
And a pair of left and right bars
Connect the legs to one of the bars
Connecting the two bars after moving the other bar
In, freely change the machine width, and the side frames <br/> toward and away freely configured according to the machine width changes, the support frame is provided on the inner surface respectively facing each of the two side frames, of the support frame Each is provided with a freely rotatable roller via a roller shaft in the left and right direction, a drive device is provided on one side frame, and a transmission device which is interlocked with this drive device and can be connected and separated to one roller is supported. A roller conveyor, wherein the roller conveyor is provided on a frame, and at least one roller is removably attached to a support frame via a cantilevered roller shaft.