JPH01110413A - Roller conveyor control device - Google Patents

Abstract

PURPOSE:To minimize the number of input/output points, and to prevent inertial running by dividing transfer rollers into groups so that when both the load detecting signal of the upstream side group and that of the downstream side group are simultaneously input, the transfer rollers can be stopped and brakes are applied. CONSTITUTION:By supplying or discharging air to or from the cylinder for each group A to N via an air-supply hose 43, a solenoid valve 41, and an airsupply hose 40, drive rollers 21 and transfer rollers 28 are connected or disconnected for transference or stoppage. In this case, for instance, if a photoelectron switch 46 detects the bucket 39 of the group N, the detected signal 60 is input into the controller 50 of the upstream side group (N-1) as a control signal 62 via a controller 50. And, when the bucket 39 advances into the group (N-1) and a detecting signal 60 is output from an photoelectron switch 46, the solenoid valve 41 is separated to stop the transfer rollers 28 and a brake-fitted roller 60 is operated. Thus, the number of input/output points can be minimized, and inertial running can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a roller conveyor that supports and conveys packets and loads themselves.

2. Description of the Related Art Conventionally, this type of roller conveyor has been provided with a structure as shown in, for example, Japanese Patent Application Laid-Open No. 57-160807. This conventional structure has a main body frame (parallel rails)
A conveyance path is formed by providing a large number of rollers that can rotate freely, 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 are provided on this pin so as to be able to freely rotate together with a sprocket that can simultaneously contact the lower outer periphery of a pair of adjacent rollers. A driving chain supported and guided by the sprocket is engaged with the sprocket. A diaphragm for moving the bottle up and down is provided between the case and the bottle, and each diaphragm is connected to a pressure source of a control device. Further, detection rollers are disposed between the rollers at predetermined intervals, and when the detection rollers are pressed down by the conveyed object, a detection signal is given to the pressure control device.

According to this conventional method, a driving chain rotates a wheel via a subrokent, and the rotation of this wheel is
The information is transmitted to a pair of rollers that are in contact with each other, and the conveyed object is conveyed on the conveyance path by the rotation of the roller group. When the detection roller in the zone in the conveyance direction detects the presence of the conveyed object, the detection signal is sent to the pressure control device, and the pressure control device controls the pressure source to change the pressure applied to the diaphragm. This moves the wheels away from the rollers and deenergizes that zone of the conveyor.

Problems to be Solved by the Invention According to the conventional method described above, wiring from each detection roller and each pressure control solenoid valve is connected to the control device (sequencer). The number of input points and output points required is equal to the number of input points, and the structure becomes complicated and the materials used are also the same. In addition, since each roller is installed so that it can rotate freely, it performs inertia rotation immediately after the wheels are separated and set to a non-driving state, which causes the conveyed object to coast (free run) and move forward. This will cause the object to collide with the stopped object.

The object of the present invention is to enable smooth tact feeding of conveyed objects, to reduce the number of input points and output points to the control unit to a minimum, and to move from a drive mode to a non-drive mode. An object of the present invention is to provide a control device for a roller conveyor that can brake a conveyed object that is about to coast immediately after the conveyor is moved.

Means for Solving the Problems In order to achieve the above object, the roller conveyor control device of the present invention includes a number of conveying rollers with drive devices that can be freely connected and disconnected and equipped with brake devices, mounted on the main body frame side. These conveyance rollers are divided into a plurality of groups in the conveyance direction, and each group is equipped with a solenoid valve that connects and disconnects the drive device for each group, and an inventory detection device within the group. The separation movement of the solenoid valve and the operation of the brake device are performed only when both the detection device in the upstream group and the detection device in the adjacent downstream group are turned on at the same time. The downstream end group is connected to the control unit.

According to the configuration of the present invention, by connecting the drive device to the conveyance roller, the conveyance roller can be forcibly rotated by the drive device to convey the object to be conveyed, and the drive device can be separated from the conveyance roller. Forced rotation can be canceled by doing this. When an object is stored in the downstream group, the object is detected by the object presence detection device and the detected signal is sent to the adjacent upstream group. When an object to be conveyed is carried into the upstream group in this state and detected by the object presence detection device, the solenoid valve of the upstream group is separated and moved by the detection signal and the detection signal from the aforementioned downstream group. The brake device for the conveying rollers of this upstream group is activated. Therefore, the conveyed object carried into the upstream group is braked without coasting, and comes to a stop within this upstream group.

Example An embodiment of the present invention will be described below based on the drawings.

l is the main body frame with a U-shaped cross section, and a pair of left and right side frames IA
, IB, and a base frame IC that connects the lower portions of these side frames IA and IB.

L-shaped guide portions 2A and 2B are formed on the opposing inner surfaces of both side frames IA and IB, and a nut body 3A is formed on the upper portion.
, 3B are formed with dovetail grooves 4A and 4B that allow sliding movement. In addition, in one of the side frames IA, the inner surface sensing at the lower part is installed on a pair of upper and lower guide rails 7 through the parts 5.6, respectively.
．． 8 is arranged in the length direction of the frame. Both sides frame IA,
The resin support frames 9A and 9B are fitted on the inner surface of the IB with their lower ends changed in position (sliding) in the frame length/width direction.
These supporting frames 9A and 9B are fixed in the changed position by screwing the bolts 1oA and 10B passed through the holes 1tA and IIB into the nut bodies 3A and 3B. be done. − side support frame 9
A is a case-shaped case, and its lower end to be fitted into the guide part 2A and the mounting thereof include a base plate part 12 in which a hole 11A is formed, and a pair of front and rear parts connected inward from the inner surface of the lower half of this base plate part 12. It is formed by a cover plate part 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 and 15b are provided above the hole 11A for mounting the base plate part 12. It is formed. The other support frame 9B has a rectangular plate shape, and locking grooves x6a and t6b are formed on both sides of the pair of mounting holes 11B with open upper and lower end surfaces and inner surfaces in the height direction. Here, the locking groove 16a, t6b c7) For installation from the back, use the hole 11B.
Distance to riL! -L2 is the mounting distance from the hole 11A to the through hole xsa, t5b in one support frame 9A, and is equal to L2. A conveying coke 28 made of resin is freely rotatably provided between both support frames 9A and 9B via a roller shaft 27 (that is, one end of the roller shaft 27 inserted through the roller shaft 27 so as to be relatively freely rotatable is inserted into the through hole 15a, 15b, and the other end is dropped into either of the locking grooves 16a, 16b from above to attach the roller shaft n. Furthermore, the conveying roller 28 is inserted around the roller axis 29.
can be freely rotated. The roller shaft 27 and the conveyance roller 2
For example, between 8 and 1! A magnetic brake device 26 is interposed. The roller axis 29 is attached to one support frame 9A.
A support shaft 18 along the axis is attached so as to be vertically swingable. That is, a bearing hole 19 is formed at the lower end of the base plate 12, and the inner end of the support Qb18 is fitted into the bearing hole 19 so that it can freely swing up and down. and a between the free ends of the cover plate part 13.
Attach the L cedar board part 23 made of T fat by inserting it, and this L
The outer end of the support shaft 18 is fitted into a vertical recess 24 formed in the vertical plate of the cedar board portion 23, thereby regulating the vertical swing range of the support M2S. 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 fitted onto the boss portion of the sprocket 20.
Both 20 and 21 are integrally rotatable. The transmission roller 21 is made of urethane rubber, and its outer periphery is freely in contact with the lower portion of the outer periphery of the conveying roller 28. Then, the air cylinder device 17 for contacting and separating is connected to the support shaft 18.
Cylinder rubber receiver 22 and L cedar board part 23 attached to the outer end of
It is interposed between the horizontal plate and the horizontal plate. The above-mentioned 17 to 24 constitute one unitized drive device 25, and this drive device 25 is arranged in large numbers on the main body frame 1, forming a pair with a conveying roller 28 via support frames 9A, 9B, etc. be done. Cheno 30, which is a common driving body linked to each sprocket, is stretched between a driving sprocket 31 and a driven sprocket 32 via a guide sprocket 33, etc., and interlocks the driving sprocket 31 with a drive sprocket 34. It is connected. Thereby, the chino 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 cenograph 30 is supported and guided by the guide rail 7 attached to the section 5 coming into contact with it from below, and in the return path 35b, it is similarly attached by the guide rail 8 attached to the section 6. Supported and guided.

The conveyance roller 28 paired with the drive device 5 as described above
By arranging the set pitch device on the main body frame 1, a conveying path 38 is formed by a group of conveying rollers 28. 39 indicates a packet which is an example of a transported object.

As mentioned above, the conveyance rollers 28 paired with the drive device 25 are arranged in a predetermined manner and divided into a plurality of groups A, B, C, 6, and 6 rollers, as shown in FIG.
...N are arranged and controlled for each group. That is, each group is provided with a supply/discharge hose 40 in which air cylinder units [17 are connected in series, and these supply/discharge hoses 40 are connected to a common air supply hose from an air supply bag @ 42 via a solenoid valve 41. 43 so that it can be selectively connected. 44 is a regulator, and 45 is a silencer. Each group A, B, C...N is provided with a photoelectronic switch 46, which is an example of a presence detection device. Here, the upstream group in the transport direction 47 includes both the optoelectronic switch 46 in the upstream group and the optoelectronic switch 46 in the adjacent downstream group.
6 are turned on at the same time, the solenoid valve 41 is separated (separates the air supply hose 43 and the supply/discharge hose 40) and the brake device 26 is operated, and either one of the photoelectronic switches 46 is turned on. When it is turned on or when both photoelectronic switches 46 are not turned on, the solenoid valve 41 operates to connect [the air supply hose 43 and the supply/discharge hose 40], and the brake device! !
26 is configured to be inactive. For this purpose, each solenoid valve 41 is incorporated into a respective control unit 50, and these control units 50 include a first normally closed contact 51, a second normally closed contact 51, and a second normally closed contact 51.
A normally closed contact 52, a normally open contact 53, etc. are incorporated. Further, only the solenoid valve 41 corresponding to group N at the downstream end is configured to be operated under control from a controller (sequencer). Outside the downstream end of the most downstream group N is a stopper device 5 consisting of a cylinder device 55 and a stopper plate 56.
7 is provided, and is controlled by a control section 54.

Next, the conveyance work in the above embodiment will be explained.

5 and 6 show that the solenoid valve 41 is switched to connect the air supply hose 43 to the supply/discharge hose 40, and the air cylinder device 17 is
The expansion causes the support shaft 18 to swing upward, and the transmission roller 21 is brought into pressure contact with the corresponding conveyance roller 28 from below.

At this time, the chino 30 is constantly being driven by the motor 34, and therefore the sprocket 20 engaged with the chino 30 is rotating around the support 11118. Further, the transmission roller 21 is in contact with the lower part of the outer periphery of the conveying roller, so that the conveying roller 28 group is forcibly rotated.
Therefore, the packet 39 can be transported on the transport path 38.

The packet 39 transported on the transport route 38 as described above is detected by the optoelectronic switch 46 each time it passes through each group A-,=N-1, but at this time, as shown in FIG. Since the photoelectronic switch 46 of the group is not detected, the electromagnetic valve 41 maintains the connected operation, and since the brake device 26 is inactive, the conveyance mode is maintained. When the packet 39 enters the most downstream group N and is detected by the optoelectronic switch 46, the detection signal 60 from the optoelectronic switch 46 and the first control signal 61 from the control section N are simultaneously input to the control unit 50. Therefore, the solenoid valve 41 is moved separately. As a result, in Group N, the air supply and discharge hose 40 stops supplying air to the air cylinder unit @17, and also opens it, causing the support shaft 18 and others to descend under their own weight, causing the virtual The transmission roller 21 is connected to the conveyance roller 28 as shown by the line.
It will be separated from the That is, the conveying rollers 28 of group N are not driven and are set free, and the brake device 26 is operated to forcibly stop the idle rotation of the conveying rollers 28. Therefore, packet 39 will be stopped within group N.

For example, as shown in FIG. 1, two packets 39 are stored on the downstream side, and when the two groups N, N-, from the downstream side are not driven, the next packet 3 is transferred on the transport path 38. Suppose that you have been transported. This packet 39 is sequentially conveyed from group A to group B. Then, as shown by the virtual line A, when the group N-1 enters the group N with the carrying force of the group N-, and is detected by the photoelectronic switch 46 of this group N-,
Group N-.

Since the detection signal 60 of group N- and the control signal 62 from the control unit 50 of downstream group N-1 are input to the control unit 50 of group N-, as shown in FIG.
The electromagnetic valve 41 of No. 2 separates I7, and therefore, in the same manner as described above, the packet 39 approaches the packet 39 of Group N-, without colliding with it, as shown by the imaginary line in FIG. It will stop.

In this way, they can be stored sequentially, but cutting out from the downstream end of the conveyance path 38 is performed according to instructions via the control unit. That is, the second control signal 63 from the control section 54 causes the stopper plate 56 to cut out the packet 39. By sending out the packet 39 in this way, the photoelectronic switch 46 of group N becomes non-detecting, the detection signal 60 disappears, and the solenoid valve 41 of group N- is connected and operated as shown in FIG. The brake device 26 of group NL1 is released,
The transport roller 28 of group N-1 is driven to sequentially transport the packet 39 to group N.

Effects of the Invention According to the present invention having the above-mentioned configuration, it is possible to smoothly carry out tact feeding of objects to be conveyed, and at the same time, depending on the operation of the load detection device for both the downstream group and the upstream group, the upstream side The drive devices of the group can be directly connected and separated, thereby reducing the number of input points and output points to the control section to a minimum, providing a simple and inexpensive structure.

Moreover, immediately after moving from the drive mode to the non-drive mode,
Brake device for conveyed objects that are being carried in and are about to coast:
This allows braking to be performed using the locked transport rollers, and the object to be transported can be stopped sufficiently close to the object stopped in front without colliding with it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a schematic side view showing the conveyance state, FIGS. 2 to 4 are circuit explanatory diagrams, FIG. FIG. 6 is a partially cutaway side view of the same. 1... Main body frame, 17... Air cylinder device,
18... Support shaft, 20... Sprocket (receiving UK body)
, 21... Transmission roller, 25... Drive device, 26...
...Brake device, 27...Roller shaft, public...Flying roller, 30...Cheno (driver), 38...Transport route, 39...Packet (transferred object), 40 ...
Supply/discharge hose, 41... Solenoid valve, 43... Air supply hose, 46... Photoelectronic switch (stock detection device), 47...
...Conveyance direction, 50... Control unit, 51... First normally closed contact, 52... Second normally closed contact, 53... Normally open contact, 54... Control unit, 57...・Stopper device, ω
...Detection signal, 61...First control signal, 62...
Control - 1 signal, 63... 2nd control signal.

Claims (1)

[Claims] 1. On the main body frame side, a large number of conveyance rollers with drive devices that can be connected and separated and equipped with brake devices are arranged, and these conveyance rollers are divided into multiple groups in the conveyance direction, and each group is A solenoid valve that connects and separates the drive device and a load detection device within the group are provided, and the upstream group in the conveyance direction has a load detection device in the upstream group and a load detection device in the adjacent downstream group. Only when both the load detection device and the load detection device enter at the same time,
What is claimed is: 1. A control device for a roller conveyor, characterized in that the control device is configured to separate a solenoid valve and operate a brake device, and has a downstream end group connected to a control section.