JPH0620741Y2 - Roller conveyor - Google Patents

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention stores loads directly or via pallets,
The present invention relates to a roller conveyor that is adopted to take out when necessary.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, for example, as seen in Japanese Utility Model Publication No. Sho 61-18750, in a frame frame,
There is provided a structure in which wheel rails having a large number of wheels are arranged in a plurality of upper and lower stages with the conveying (sliding) direction inclined. According to this conventional structure, the load loaded on the upper slope portion slides on the wheel and is received by the stopper provided on the lower end, and the sequentially loaded loads are stored on the front load. It will be. Then, the stored load is taken out from the lower inclined portion as needed, and the take-out trace is filled by sliding the load at the rear position. In this conventional example, loading and unloading of a load are performed manually, but in a large-sized shelf handling a large load, loading and unloading of the load is performed using, for example, a forklift truck.

Problems to be Solved by the Invention According to the conventional type as described above, since the movement of the load is the sliding type utilizing the free rotation of the wheel, the free rotation is not smoothly performed or there is a variation in the load. In some cases, the sliding does not occur reliably, resulting in poor reliability. Also, from the viewpoint of frictional resistance, some may not be usable depending on the material of the pallet. It is conceivable to take a sufficient inclination angle for these, but if the inclination angle is large, the sliding speed will be high and will not be constant, and the impact will increase when it is received by the stopper. Stability will be poor. Further, since the loads collide (interfere) with each other and are stored, the loads are liable to be broken or damaged, and mechanical catching is likely to occur at the time of re-moving.

An object of the present invention is to provide a roller conveyor that can reliably move a load at a substantially constant speed and can store the load without interference between the loads.

Means for Solving the Problems In order to achieve the above object, the main body frame of the present invention is provided with a large number of idler rollers forming an inclined conveying path, and a support shaft capable of vertically swinging under each idler roller. Provided on these support shafts are toothless chain wheels that can freely rotate in the same direction as the idler roller,
A braking body that is connectable and separable below the idler roller is provided on these toothless chainwheels, and a stopper body that is inserted between the teeth of the toothless chainwheels and fixes the toothless chainwheels is detachably provided, The conveyance path composed of the idler roller group is divided into a plurality of zones, and each zone is provided with a valve device for connecting and disconnecting the braking body and a non-contact type presence detection device, which are adjacent to each other in the conveyance direction.
Each zone is provided with a control circuit connected to each valve device and the presence detection device so that the brake body separates when there is no load in the downstream zone.

According to the structure of the present invention, by switching to one of the valve devices, the support shaft is moved downward to separate the braking body from the idle roller, so that the idle roller group is not braked. Therefore, the load supported by the idling roller group can be moved on the conveying path inclined by the idling of the idling roller group. Then, by switching the valve device to the other side, the support shaft is moved upward to connect the braking body to the idler roller, thereby braking the idler roller and stopping the rotation, thereby preventing the movement of the load. . When a zone with no load is generated under the condition of performing such operation, this zone and the upstream zone are separated at the same time, whereby the load of the upstream zone is moved to the downstream zone. You can postpone. Then, the forwarded load is stopped and stored without abutting the load stopped in the downstream zone by adjusting the timing of switching the valve device based on the detection of the presence detection device. Become.

Also, after removing the stopper body and rotating the toothless chain wheel according to the tooth pitch, insert the stopper body between the other teeth and attach it, and rotate the braking body together with the toothless chain wheel by the same amount. As a result, the contact position of the braking body with respect to the idler roller can be changed in the circumferential direction. Therefore, when a part of the braking body is worn due to long-term use and the braking force is reduced, the contact position of the braking body with respect to the idler roller can be easily changed as described above and the braking roller can be continuously used. Moreover, since the space corresponding to the lack of teeth can be omitted by using the toothless chainring, the toothless chainring can be attached even in a narrow space.

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

In FIGS. 1 and 2, reference numeral 50 denotes a shelf frame, which includes a plurality of left and right front columns 51, a plurality of left and right rear columns 52, a front cross member 53 connecting the front columns 51, and a rear column 52. Rear cross member 54
And a front and rear member 55 connecting the front and rear of the front support column 51 and the rear support column 52. A roller conveyor 1 having a large number of idle rollers is provided in a plurality of compartments formed between the columns 51 and 52 of the shelf frame 50 in the left-right direction, and the conveyor path 2 is inclined to form a plurality of vertical stages. It is arranged. That is, the sixth
As shown in FIG. 8 to FIG. 8, the main body frame 3 of the roller conveyor 1 includes a pair of left and right side frames 4A and 4B and side frames 4A and 4B.
It is constituted by a base frame 4C connecting the lower portions of A and 4B. The base frame 4C is plural in the carrying direction and is connected between the both side frames 4A, 4B via bolts / nuts 5A, 5B and the like passed from below. The side frames 4A and 4B are fixed to the shelf frame 50 via bolts and nuts 6A and 6B. L-shaped guide portions 8A and 8B are formed on the inner surfaces of the side frames 5A and 5B which face each other, and the dovetail groove portion 10 which allows the nut bodies 9A and 9B to slide on the upper portions thereof.
A and 10B are formed.

A pair of left and right idle rollers 11A,
The 11B group is arranged so as to be located inside the both side frames 4A, 4B. Here, one idle roller 11A group is unitized with the braking device 20. That is, as shown in FIGS. 6 to 8, the braking device 20 has a case-shaped support frame 21 made of resin as a main body, and the lower end of the substrate portion 22 is fitted to the guide portion 8A, and the substrate portion is By screwing the bolt 23 passing through the middle of 22 into the nut body 9A, the position can be changed (slipped) in the frame length direction and can be fixed at the changed position. The lower end 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 portion 26 is formed at the lower end of the base plate portion 22, and an inner end of a support shaft 27 in the left-right direction is fitted into the bearing hole portion 26 so that the support shaft 27 can swing vertically. Then, an L-shaped plate portion 28 made of resin is inserted and attached between the free ends of the cover plate portion 24, and the outer end of the support shaft 27 is inserted into a vertical recess 29 formed in the vertical plate of the L-shaped plate portion 28. By fitting, the vertical swing range of the support shaft 27 is regulated. This support shaft 27 has a missing tooth ring 30
Is rotatably attached, and a braking body 31 is externally fitted to the protruding boss portion of the toothless chain wheel 30 to integrate the both 30, 31. The braking body 31 is made of urethane rubber, and the outer periphery of the braking body 31 is connectable and separable (abuttable and separable) to the lower outer peripheral portion of the idler roller 11A. A cylinder device 32 using air for connecting and disconnecting is interposed between the cylinder rubber receiver 33 attached to the outer end of the support shaft 27 and the lateral plate of the L-shaped plate portion 28.
Further, a receiving plate 35 is continuously provided 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 braking 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 substrate 22 and the upper end of the substrate 22. That is, the idler roller 11A is fitted onto the roller shaft 12 so as to freely rotate, and further, the washer 13 and the collar are provided on both sides.
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. Two (or one) stopper bodies 43 that engage between the teeth of the toothless chain wheel 30 can be inserted into and removed from a support cylinder portion 44 formed in the substrate portion 22.

As shown in FIG. 6, 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 has the guide portion 8B.
And is fixed to the side frame 4B by screwing the bolt 18 passing through the middle into the nut body 9B.

The roller conveyor 1 has a shelf frame 50 of its main body frame 3.
The transport path 2 can be tilted at a desired angle by adjusting the connection position with respect to. The transport path 2 has a plurality of zones in the transport direction. Here, as shown in FIGS. 3 to 5, for example, the upper upstream zone is A and the lower downstream zone is J. 10 zones A, B,
C, D, E, F. It is divided into G, H, I and J. The connecting / separating movement of the braking body 31 with respect to the idler roller 11A is performed separately for each of the zones A to J. At that time, one valve device 61 for connecting and separating the braking device 20 is provided in each of the zones A to J. To be That is, the supply / discharge hose 62 connected to the cylinder device 32 group of the braking device 20 is connected to the 5-port electromagnetic valve device 61.
It is configured to be connectable to the supply hose 64 from the supply source 63 via. 65 is a regulator and 66 is a silencer. The load 57 includes a pallet 58 and an article 59 placed on the pallet 58, but the pallet 58 may not be used. 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 braking device 20 separates when the load 57 is absent in the downstream zone. That is, the control devices 71A, 71B, 71C,
71D, 71E, 71F, 71G, 71H, 71I, 71J are arranged, and these control devices 71A to 71J are connected to each other and to the power supply device 72 in series. And each zone B excluding zone A on the upstream side
Non-contact type presence detection device 73B, 73C, 73D, 73E, 73F, 73 for J
G, 73H, 73I, 73J are provided, and these presence detection devices 73B-7
3J is connected to the braking devices 71A to 71F in the adjacent upstream zones. For example, the presence detection device 73B is the control device 71A
73C is connected to 71B. Then, each control device 71A to 71G, when the downstream load detection device is not detected, connects the corresponding valve device 61 with the control signals 74A, 74B, 74C, to connect the zone and the upstream zone. 74D, 74E, 74F, 74G,
Configured to give 74H, 74I, 74J.

The presence detection devices 73A to 73G include a reflecting mirror and a photoelectric switch. That is, as shown in FIG. 6, a holding plate 76 extending upward through bolts and nuts 75 is provided on the outer surface of one side frame 4A, and a reflecting mirror is provided above the holding plate 76.
77 is installed. Here, the reflecting mirror 77 is the other side frame 4B.
It is set to face the inner surface of the lower part of. The other side frame 4
A switch bracket 78 is attached to the inner surface of the lower portion of B, and a photoelectric switch 79 is attached to the switch bracket 78.
Is attached so that the angle can be changed.

Support plates 81 are attached to the upper ends of both side frames 4A and 4B via bolts and nuts 80, and guide bodies 82 are provided on the inner surface sides of the support plates 81 facing each other. 83 is a cover, 84 is a stopper, and 85 is a forklift truck.

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

Zone A of FIG. 3, FIG. 6 to FIG. 8 and FIG.
D, G to G switch the valve device 61 to connect the supply / discharge hose 62 to the supply hose 64, and the expansion of the cylinder device 32 causes a compression spring.
The support shaft 27 is swung upward against the pressing force of the pressing member 36, and the braking member 31 is brought into contact with the corresponding idler roller 11A from below. Therefore, the idling roller 11A can be prevented from idling, whereby the load 57 can be braked and prevented from moving.

For example, as shown by zones E and F in FIG. 5, when the valve device 61 is switched to open the supply / discharge hose 62, the cylinder device
Since 32 is inoperative, the support shaft 27 is swung downward by the pressing force of the compression spring 36, and the braking body 31 is separated from the idler roller 11A as shown by a virtual line Q in FIG. ing. Therefore, the braking action is not generated, whereby the load 57 on the transport path 2 is supported between the groups of both idle rollers 11A and 11B, and both side surfaces thereof are guided by the guide body 82. It will move on route 2.

In the presence detection devices 73B to 73J 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 load 57, the reflected light beam is a photoelectric switch.
It enters 79 and becomes a non-detection state. When the load 57 is present, the red light is blocked by the load 57 and does not reach the reflecting mirror 77, and since there is no reflected light beam, the photoelectric switch 79 is detected.

The roller conveyor 1 consisting of a pair of idle rollers 11A and 11B basically moves the load 57 and brakes it as described above. Movement is controlled by switching the valve device 61 based on detection or non-detection.

That is, when the transport path 2 is empty, the presence detection devices 73B to 73J are not detected, and the valve device 61 is switched so as not to supply the air from the supply hose 64 to the supply / discharge hose 62. . This opens all supply and discharge hoses 62,
As described above, the braking member 31 is moved away from each other to freely rotate the idle roller 11A group. In this state, forklift truck 85
When the load 57 is unloaded on the upstream end zone A by means of the above, since the load detection device 73B in the downstream zone B adjacent to the zone A is not detected as described above, both zones A and B are in the non-braking state. As a result, the load 57 moves from zone A to zone B based on the inclination. When the load 57 enters the zone B, the presence detection device 73B of the zone B detects and operates. However, since the presence detection device 73C of the zone C is not detected as described above, both of the zones B, C is in a non-braked condition and load 57 is moved from zone B to zone C.
The pallet 58 of the load 57 sequentially conveyed to the downstream side in this manner comes into contact with the stopper 84 and stops, and is stored in the zone J. The second load 57 is also moved in the same manner, but when it enters the zone I here and is detected by the presence detection device 73I, the presence detection device in the downstream zone J is detected.
Since the valve 73J is moving, the valve device 61 in the zone I is switched to bring the braking body 31 into contact with the idler roller 11A. As a result, rotation of the idler rollers 11A group in zone I is blocked, and the load 57 is braked.
Are stopped and stored in zone I without colliding with load 57 in zone J. The loads 57 are stored in all the zones A to J by such a work as shown in the phantom lines in FIGS. 3 and 4, and thus the loads 57 are stored in all the zones A to J. During the operation, these loads 57 are detected by the presence detection devices 73B to 73J. As a result, as described above, the braking member 31 comes into contact with the idler roller 11A and each zone A to
J is being braked. In this state, if the forklift truck 85 takes out the load 57 in the zone J, the detection signal from the load detection device 73J in the zone J disappears.
That is, since the load 57 does not exist in the zone J on the downstream side in the zones J and I which are in contact with each other in the transport direction, the control signal 74I is output from the control device 71I corresponding to the zone I to the valve device 61 at the same time. , A control signal 74J is output from the control device 71J corresponding to the zone J to the valve device 61.
61 automatically switches to open and close hose 62. Therefore, in both zones I and J, the braking body 31 is in a state of moving apart, and the load 57 of the zone I is moved to the zone J. When the load 57 enters zone J and is detected by the presence detection device 73J, the valve device 61 corresponding to this zone J is switched, the braking body 31 acts on the idler roller 11A, and the load 57 exerts a braking action. Will receive. Also, load 57 is zone J
When it is carried out to the zone I, the detection signal from the load detecting device 73I in the zone I disappears, whereby the zone I and the zone H are brought into the non-braking state in the same manner as described above, and the load in the zone H
Move 57 to Zone I. By repeating such an operation, the load 57 on the transport path 2 can be sequentially fed between the zones. Note that FIG. 5 shows the case where the load 57 in the zone E is moving to the zone F.

As described above, when the braking body 31 is brought into contact with the idler roller 11A from below, the braking body 31 together with the toothless chain wheel 30 supports the spindle.
Although it tries to rotate around 27, this can be prevented because the stopper body 43 supported on the side of the base plate portion 22 is engaged between the teeth of the toothless chain wheel 30. Further, the stopper body 43 is pulled out, the toothless chain wheel 30 is rotated around the support shaft 27 in accordance with the tooth pitch, and then the stopper body 43 is engaged between the other teeth, whereby the toothless chain wheel 30 By rotating the braking body 31 integrated with the same amount by the same amount, the contact position of the braking body 31 with respect to the idler roller 11A can be changed in the circumferential direction.

Therefore, when a part of the braking body 31 is worn due to long-term use and the braking force is reduced, it is possible to easily change the contact position of the braking body 31 with respect to the idler roller 11A as described above and continue to use it. Further, by using the toothless chain wheel 30, it is possible to save a space corresponding to the lack of teeth, so that the toothless wheel chain 30 can be attached even in a narrow space.

Effect of the Invention According to the present invention having the above-described configuration, by switching the valve body to one side to separate the braking member from the idler roller, the idler roller group can be in a free state in which no brake is applied, and thus the idler roller group can be freed. The load supported by the rolling roller group can be moved on the inclined conveyance path. Then, by switching the valve device to the other side to connect and move the braking device to the idler roller, the idler roller can be braked to stop the rotation, and thus the movement of the load can be prevented.

Then, when a zone where no load exists under the conditions for performing the above operation, this zone and the upstream zone are separated at the same time, whereby the load of the upstream zone is forwarded to the downstream zone. it can. At this time, by sufficiently setting the inclination angle of the transport path, even a light load can be reliably moved at a substantially constant speed without causing flow defects. Moreover, the load that was sent in sequence,
By adjusting the switching timing of the valve device based on the detection of the load detection device, it is possible to stop and store without contacting the load that is stopped in the downstream zone, and the load is broken or damaged. Furthermore, since the presence detection device is a non-contact type, the re-movement can be performed without causing a catch.

Also, after removing the stopper body and rotating the toothless chain wheel according to the tooth pitch, insert the stopper body between the other teeth to attach it, and rotate the braking body together with the toothless chain wheel by the same amount. As a result, the contact position of the braking body with respect to the idler roller can be changed in the circumferential direction. Therefore, when a part of the braking body is worn due to long-term use and the braking force is reduced, it is possible to easily change the contact position of the braking body with respect to the idler roller as described above and continue to use it. The body can be used for a long period of time without being replaced with a new one. Moreover, since the space corresponding to the lack of teeth can be omitted by using the toothless chainring, the toothless chainring can be attached even in a narrow space.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of the whole, FIG. 2 is a front view of essential parts, FIG. 3 is a side view of a roller conveyor, FIG. 4 is a plan view of the same, and FIG. FIG. 6 is a side view for explaining the piping and control, FIG. 6 is a vertical sectional front view, FIG. 7 is a vertical sectional front view of the braking device portion, FIG. 8 is a partially cutaway side view of the braking device portion, and FIG. It is a cross-sectional top view of the principal part in FIG. DESCRIPTION OF SYMBOLS 1 ... Roller conveyor, 2 ... Conveyance path, 3 ... Main body frame, 11A, 11B ... Idler roller, 12 ... Roller shaft, 20 ... Braking device, 27 ... Support shaft, 30 ... Missing chain wheel, 31 ... Braking body, 32 ... Cylinder device, 36 ... Compression spring, 43 ... Stopper body, 50 ... Shelf frame,
57 ... Load, 58 ... Pallet, 59 ... Article, 61 ... Valve device, 62 ... Supply / discharge hose, 64 ... Supply hose, 70 ... Control circuit, 71A to 71J
... Control device, 73B-73J ... In-vehicle detection device, 74A-74J ...
Control signal, 77 ... Reflector, 79 ... Photoelectric switch, A to J ... Zone.

Claims (1)

[Scope of utility model registration request] 1. A plurality of idle rollers (11A, 11B) forming an inclined conveying path (2) on a main body frame (3) and vertically swingable below each idle roller (11A, 11B). The support shafts (27) are provided, and the support shafts (27) are provided with toothless chain wheels (30) that can freely rotate in the same direction as the idler rollers (11A, 11B).
(30) is provided with a braking body (31) which is connectable and separable under the idler rollers (11A, 11B), and is inserted between the teeth of the toothless chainwheel (30) so that the toothless chainring (30) ) Is detachably provided, and the conveying path (2) consisting of the above-mentioned idle roller (11A, 11B) group is divided into a plurality of zones (A to J) and each zone (A to J). ), A valve device (61) for connecting and disconnecting the braking body (31) and a non-contact type presence detection device (73B to 73J) are provided, and two zones adjacent in the transport direction are located on the downstream side. A control circuit (70) connected to each valve device (61) and the presence detection device (73B to 73J) is provided so that the braking body (31) can be separated when the load (57) is absent in the zone. A roller conveyor characterized by that.