JPH0679927B2 - Roller conveyor controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a roller conveyor that supports and conveys a bucket containing a load and the load itself.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, a structure disclosed in, for example, JP-A-57-160807 has been provided.
In this conventional structure, a large number of rollers are provided on a main body frame (parallel rails) so as to rotate freely to form a conveyance path, and a case is provided on the main body frame side via a support bracket or the like. This case is provided with a pin along the axis of the roller, and a wheel and a sprocket that can be simultaneously brought into contact with the lower outer circumferences of a pair of adjacent rollers are integrally rotatably provided on this pin, and the case side The drive chain, which is supported and guided by, is engaged with the sprocket. A diaphragm for raising and lowering the pin is provided between the case and the pin, and each diaphragm is connected to the pressure source of the control device. A detection roller is arranged between the rollers at predetermined intervals, and a detection signal is given to the pressure control device when the detection roller is pushed down by the object to be conveyed.

According to this conventional type, the drive chain rotates the wheel through the sprocket, and the rotation of the wheel is
The object to be conveyed is conveyed on the conveying path by the rotation of the group of rollers, which is transmitted to the pair of rollers in contact with each other. When the detection roller in a certain zone in the transport direction detects the presence of the transported object, the detection signal enters the pressure control device, and the pressure control device controls the pressure source to change the pressure applied to the diaphragm. Thus, the wheels are spaced from the rollers to deactivate that zone of the conveyor.

Problems to be Solved by the Invention According to the above-mentioned conventional type, wiring from each detection roller and each pressure control solenoid valve is connected to the control device (sequencer), that is, the detection roller and solenoid valve. Since the number of input points and output points is required, the structure becomes complicated and the cost is too high. The same applies when the detection roller is replaced with a photoelectric switch. In addition, since each roller is mounted so that it can rotate freely, inertial rotation is performed immediately after the wheels are separated from each other so that the wheels are not driven. It will collide with the transported object stopped at.

The object of the present invention is to smoothly carry out tact feeding of a conveyed object, but the number of input points and output points to the control unit can be reduced to the minimum score, and moreover, the driving mode is changed to the non-driving mode. Immediately after that, there is a point of providing a control device of a roller conveyor capable of controlling a conveyed object which is about to coast.

Means for Solving the Problems In order to achieve the above-mentioned object, a controller for a roller conveyor according to the present invention is provided with a large number of conveying rollers, to which a drive device can be connected and separated, on the body frame side. The rollers are divided into a plurality of groups in the transport direction, and each group is provided with a solenoid valve that connects and disconnects the drive device in group units.The solenoid valve of the upstream group in the transport direction is located in the adjacent downstream group. It is configured so that it separates according to the detection signal of the presence detection device provided in the above, and it is configured to connect when it is not detected.Brake rollers are provided in each group. A stopper device is provided which is configured to operate and is connected to the control unit at the downstream end in the transport direction.

According to the configuration of the present invention, by connecting the driving device to the carrying roller, the carrying device is forcibly rotated by the driving device to carry the object to be carried, and the driving device is separated from the carrying roller. By doing so, forced rotation can be released. When an object to be conveyed is stored in a certain group, the in-cargo detection device detects the object to be conveyed, and the detection signal is directly applied to the solenoid valve of the upstream group to separate the solenoid valve. In addition to moving, the rollers with brakes in this group are braked. Therefore, since the transport roller group in one upstream group is not driven, the transported object transported from two upstream groups coasts in one upstream group and then becomes a roller with a brake. Braked,
It will be stopped in this one upstream group.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

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. L-shaped guide portions 2A, 2B are formed on the inner surfaces of the side frames 1A, 1B that face each other, and dovetail grooves 4A, 4B that allow the nut bodies 3A, 3B to slide are formed on the upper portions. A pair of upper and lower guide rails 7 and 8 are arranged in the frame length direction on the inner surface side of the lower portion of one side frame 1A via mounting portions 5 and 6, respectively. On the inner surface side of the both side frames 1A, 1B, the lower ends of which are fitted, and resin supporting frames 9A, 9B are provided so as to be positionally changeable (sliding) in the frame length direction,
These support frames 9A and 9B have mounting holes 1 formed in the middle part.
The bolts 10A, 10B passed through A, 11B are screwed into the nut bodies 3A, 3B to be fixed at the changed position. One of the support frames 9A has a case shape, and is provided continuously from the inner surface of the lower half of the substrate portion 12 to the inside, with the lower end to be fitted to the guide portion 2A and the substrate portion 12 having the mounting hole 11A formed therein. It is formed by a pair of front and rear cover plate parts 13 and a connecting plate part 14 provided between the lower ends of these cover plate parts 13, and a pair of upper and lower through holes 15a above the mounting holes 11A of the substrate part 12, 15b is formed. The other support frame 9B is in the shape of a rectangular plate and has locking grooves 16a, 16b with upper and lower end surfaces in the height direction and inner side surfaces open on both sides across a pair of mounting holes 11B. Here, the distances L ₁ and L ₂ from the inner portions of the locking grooves 16a and 16b to the mounting holes 11B are equal to the distances L ₁ and L ₂ from the mounting holes 11A to the through holes 15a and 15b in one support frame 9A. I am doing it. Between the both support frames 9A and 9B, a resin transport roller 28 is provided via a roller shaft 27 so as to be freely rotatable. That is, one end of the roller shaft 27 that is inserted freely freely relative to the other is inserted into one of the through holes 15a and 15b, and the other end is dropped into one of the locking grooves 16a and 16b from above so that the roller shaft 27 It can be attached, and the transport roller 28 can be freely rotated around the roller axis 29. On one support frame 9A, the support shaft 18 along the roller shaft center 29
Is mounted so that it can swing up and down. That is, the bearing hole portion 19 is formed at the lower end of the base plate portion 12, and the inner end of the support shaft 18 is fitted into the bearing hole portion 19 so as to be vertically swingable. Then, an L-shaped plate portion 23 made of resin is inserted between the free ends of the cover plate portion 13 to be attached, and the outer end of the support shaft 18 is fitted in a vertical recess 24 formed in the vertical plate of the L-shaped plate portion 23. By fitting, the vertical swing range of the support shaft 18 is regulated. A sprocket 20, which is an example of a passive wheel, is rotatably attached to the support shaft 18, and a transmission roller 21 is externally fitted to a boss portion of the sprocket 20 so that the both 20 and 21 can rotate integrally. This transmission roller 21
Is made of urethane rubber, and its outer circumference can be brought into contact with and separated from the lower outer circumference of the carrying roller 28. An air cylinder device 17 for contacting and separating is interposed between a cylinder rubber receiver 22 attached to the outer end of the support shaft 18 and a lateral plate of the L-shaped plate portion 23. A unitized drive unit 25 is formed by the above 17 to 24, and the drive unit 25 is provided in the main body frame 1 in a large number as one set with the transfer rollers 28 via the support frames 9A and 9B. To be done. A chain 30 which is a common driving body interlocking with each sprocket 20 is stretched between a driving sprocket 31 and a driven sprocket 32 via a guide sprocket 33, and the driving sprocket 31 is connected to a motor 34.
Is linked to. As a result, the chain 30 forms an action path 35a that meshes with each sprocket 20, and a return path 35b located below the action path 35a. In the action path 35a, the chain 30 is supported and guided by contacting the guide rail 7 attached to the attachment portion 5 from below, and the return path 35b.
Similarly, it is supported and guided by the guide rail 8 attached to the attachment portion 6.

The transport roller 28 paired with the drive device 25 as described above.
Are arranged on the main body frame 1 at every setting pitch P to form a conveying path 38 by the group of conveying rollers 28. 39
Shows a bucket which is an example of the transported object.

As described above, the transport roller 28 paired with the drive device 25.
Is a predetermined array, as shown in FIG. 1, for example.
A plurality of groups A, B, C ... N are arranged with each group as one group, and each group is controlled. That is, for each group, a supply / discharge hose in which the air cylinder device 17 is connected in series.
40 are provided, and these supply / discharge hoses 40 are configured to be selectively connectable to a common supply hose 43 from the supply device 42 via electromagnetic valves 41, respectively. 44 is a reguulator and 45 is a silencer. Each group A, B, C ... N is provided with an optoelectronic switch 46, which is an example of the presence detection device. Here, the solenoid valve 41 of the upstream group in the transport direction 47 is separated by the detection signal 48 from the optoelectronic switch 46 provided in the adjacent downstream group (the supply hose 43 and the supply / exhaust hose 40 are separated from each other). In addition, the photoelectric switch 46 is configured to be connected (connection between the air supply hose 43 and the supply / discharge hose 40) when the photoelectric switch 46 is not detected. Further, only the solenoid valve 41 corresponding to the group N on the downstream side is configured to be operated by the first control signal 50 from the control section (sequencer) 49. Further, another opto-electronic switch 51 is arranged in the group N at the downstream end, and the detection signal 52 thereof enters the control section 49. A cylinder device 53 and a stopper plate are provided outside the downstream end of the group N.
And a cylinder device 53 is controlled by a second control signal 56 from the control unit 49. Further, each group A, B, excluding the most downstream group N
A roller 60 with a brake is provided in each of C ... N- ₁ . The brake roller 60 is located in the middle of each group and forms a set pitch P with the front and rear transport rollers 28. Further, as shown in FIG. 5, the roller 60 with a brake has a roller shaft 61 on the side frames 1A, 1B side through a pair of supporting frames 9B in the same manner as the carrying roller 28.
Is supported, and the roller 62 is mounted on the roller shaft 61 and the roller shaft center 63
These roller shafts are fitted around the
A braking device 64 is interposed between 61 and the roller 62.
Further, the braked roller 60 is provided with a brake device 64 based on the detection signal 48 from the photoelectric switch 46 of the downstream group so as to perform the brake operation when the group is separated.
Is configured to operate.

Next, the carrying work in the above embodiment will be described.

3 and 4, the solenoid valve 41 is switched to connect the air supply hose 43 to the air supply / exhaust hose 40, the support shaft 18 is swung upward by the extension of the air cylinder device 17, and the transmission roller 21 is supported. It is pressed against the transporting roller 28 from below. At this time, the chain 30 is constantly driven by the motor 34, so that the sprocket 20 engaged with the chain 30 is rotating around the support shaft 18. Further, since the transmission roller 21 is in contact with the lower portion of the outer periphery of the transportation roller 28, the transportation roller 28
The group can be forcibly rotated so that the bucket 39 can be transported on the transport path 38.

The bucket 39 transported on the transport path 38 as described above.
Comes into contact with the protruding stopper plate 54 of the stopper device 55, and stops at the downstream position of the brake rollers 60 of the most downstream group N to group N _-1 . The stopped bucket 39 is detected by the photoelectron switch 46 of the group N and the photoelectron switch 51 separately provided. The detection signal 52 of the optoelectronic switch 51 enters the control section 49, and at the same time the load is confirmed at the most downstream side, at the same time, the first control signal 50 is given to the solenoid valve 41 corresponding to the group N, and this solenoid valve 41 is separated. .
As a result, in the group N, air supply to the air supply / exhaust hose 40 and the air cylinder device 17 is stopped and opened, and the support shaft 18 and the like descend by its own weight, so that the transmission roller 21 and the transfer roller 21 are conveyed. It will be separated from 28. That is, the group 28 of conveying rollers 28 is not driven. Further, the detection signal 48 of the opto-electronic switch 46 enters the solenoid valve 41 in the adjacent upstream group N _-1, and separates this solenoid valve 41 to perform the group N operation in the same manner as described above.
_The group of transport rollers 28 of _-1 is not driven, and at the same time, the brake device 64 of the rollers with brake 60 of this group N _-1 is operated.

For example, as shown in Fig. 1, there are two buckets on the downstream side.
39 are stored, and 3 groups from the downstream side
It is assumed that the next bucket 39 is transported on the transport path 38 while N, N _-1 and N _-2 are not driven. This bucket 39
Are sequentially transported from group A to group B. Then, as shown in phantom Lee, enters the group N _-2 in conveying force of the group N _-3, that are detected in the opto-electronic switches 46 in this group N _-2, carrying one upstream group N _-3 The roller group 28 for driving is not driven. As a result, the bucket 39 will not be forcibly transported and will coast, but this group N _-2
When it reaches the roller 60 with brake, the vehicle is braked, and as shown by the phantom line B, the bucket 39 stored in the group N _-1 does not collide with the vehicle and stops sufficiently close to the bucket 39.

Although they can be sequentially stored in this way, cutting out from the downstream end of the transport path 38 is performed by an instruction via the control unit 49. That is, the second control signal 56 from the controller 49 lowers the stopper plate 54, and
Cut off control signal 50. As a result, the solenoid valve 41 corresponding to the group N is connected and driven, and the carrying roller 28 of the group N is driven to cut out the bucket 39. Optoelectronic switch 46 in this manner Baketsuto 39 Yotsute that is sent a group N becomes undetected, the far the electromagnetic valve 41 of the connexion Group N _-1 eliminates the detection signal 48 is connected moving, Group N _- The brake device 64 of the roller 60 with the brake ₁ is released, and the transport roller 28 of the group N ₋₁ is driven to sequentially feed the bucket 39 to the group N.

In the above-mentioned embodiment, the roller 60 with a brake is of a non-driving type, but as shown in FIG.
64 and 64 may act reversibly.

EFFECTS OF THE INVENTION According to the present invention having the above-described configuration, it is possible to smoothly perform the tact feeding of the transported object, but connect the drive device of the upstream group according to the operation of the load detection device of the downstream groove. Separation can be directly performed, whereby the number of input points and output points for the control unit can be reduced to the minimum number, and a simple and inexpensive structure can be provided. Moreover, immediately after shifting from the driving form to the non-driving form, the conveyed object to be coasted can be braked by the roller with the brake, without colliding with the conveyed object stopped in front, And it can be stopped sufficiently close.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a schematic side view showing a carrying state, FIG. 2 is a circuit explanatory view, and FIG. 3 is a partially cutaway side view of essential parts. 4, FIG. 5 and FIG. 5 are front views with the same part cut away, and FIG. 6 is a front view with a part cut away of the essential part showing another embodiment. 1 ... Main body frame, 17 ... Air cylinder device, 18 ...
Support shaft, 20 ...... Sprocket (passive wheel), 21 ...... Transmission roller, 25 ...... Drive device, 27 ...... Roller shaft, 28 ...... Conveying roller, 30 ...... Chain (drive body), 38 ...... Transport route, 39
...... Bucket (object to be transported), 40 …… supply / discharge hose, 41 ……
Solenoid valve, 43 ... Air supply hose, 46 ... Photoelectric switch (in-vehicle detection device), 47 ... Transport direction, 48 ... Detection signal, 49 ...
... Control unit, 50 ... First control signal, 51 ... Photoelectric switch, 52 ... Detection signal, 55 ... Stopper device, 56 ... Second
Control signal, 60 …… Roller with brake, 62 …… Roller,
64 …… Brake device.

Claims (1)

[Claims] 1. A large number of conveying rollers to which a driving device is connectable and separable are arranged on the main body frame side, and the conveying rollers are divided into a plurality of groups in the conveying direction, and each group is divided into groups. A solenoid valve for connecting and disconnecting the drive device is provided, and the solenoid valves of the upstream group in the transport direction are separated by the detection signal of the presence detection device provided in the adjacent downstream group and are connected by non-detection. Each group is provided with a roller with a brake, and this roller with a brake is configured to perform a brake operation when the groups are separated, and a stop device connected to the control unit at the downstream end in the transport direction. A roller conveyor control device characterized by being provided with.