JPH01110412A - 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 the stoppage of the upstream group and the operation of brake-fitted rollers can be carried out by the load detecting signals of respective downstream groups, and by arranging a stopper connected to a control part at the downstream end in the transfer direction. CONSTITUTION:By changing over a solenoid valve 41, drive rollers 21 and transfer rollers 28 are connected or disconnected for each group A to N for transference or stoppage. When the bucket 39 of the group N abuts on a stopper plate 54 to operate a photoelectron switch 51, the solenoid valve 41 is separated by the control signal 50 of a controller 49 to stop the group N. At the same time, the detecting signal 48 of a photoelectron switch 46 is input into the solenoid valve 41 of the group (N-1). Thereby the solenoid valve 41 is separated to stop the group (N-1), and further the brake of a brake-fitted roller 60 is applied to perform braking action. Thus, the number of input/output points can be minimized, and further 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 containing loads and loads.

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 one 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 bin along the axis of the roller, and a wheel and a sprocket are provided on this bin so as to be able to freely rotate together with a sprocket that can simultaneously contact the lower part of the outer periphery of a pair of adjacent rollers. The drive chain 2 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 arranged between the rollers at predetermined intervals, and when the detection rollers are pressed down by the object to be conveyed, a detection signal is given to the pressure control device.

According to this conventional method, a driving chain rotates a wheel through a sprocket, 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 InventionAccording to the above conventional format, the control device! Since the wiring from each detection roller and each pressure control solenoid valve is connected to the lt (sequencer), it requires as many input points and output points as there are detection rollers and solenoid valves, making the structure complicated. However, it also had the disadvantage of being too expensive.And the same problem would occur even if the detection roller was replaced with a photoelectronic switch.Furthermore, each roller is attached so that it can rotate freely.

Immediately after the wheels are separated and set to the non-drive mode, inertia rotation is performed, which causes the conveyed object to coast (
This results in a collision with the conveyed object that is free-ranked and stopped in front.

An object of the present invention is to reduce the number of input points and output points to the control section to a minimum number while allowing smooth tact feeding of the transported object.

Moreover, immediately after moving from the drive mode to the non-drive mode,
The 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.

Means for Solving the Problems Kamimachi In order to achieve the object, the roller conveyor control device of the present invention is provided with a large number of conveying rollers, which can be connected and separated by drive devices, on one main frame side, and these conveying rollers are 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 for each group. It is configured to separate and move according to the detection signal of the presence detection device installed in the group, and to connect and move when it is not detected.A roller with a brake is provided in each group, and the roller with the brake is
The brake is configured to operate when the group is in separation motion, and a stopper device connected to the control unit is provided at the downstream end in the conveying direction.

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 being stored in a group, the object detection device detects the object and directly applies the detection signal to the solenoid valve in the upstream group, which activates the solenoid valve to separate it. At the same time, the brake-equipped rollers in this group are operated. Therefore, since the conveyance roller group in the group one upstream is not driven, the conveyed objects conveyed from the two upstream groups coast in the group one upstream, and then are braked by the rollers equipped with brakes. and this one
It will stop at one group upstream.

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

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. Both sides frame IA.

L-shaped guide portions 2A and 2B are provided on the opposing inner surfaces of the IB.
are formed, and furthermore, dovetail grooves 4A and 4B are formed in the upper part to allow sliding of the nut bodies 3A and 3B. Also-
On the inner side of the lower part of the side frame IA, a pair of upper and lower guide rails 7.8 are disposed in the longitudinal direction of the frame through attachment portions 5.6, respectively. A support frame 9A made of resin is fitted onto the inner surfaces of both side frames IA and IB by fitting the lower ends thereof.
, 9B are provided so that their positions can be changed (slidably) in the length direction of the frame, and these support frames 9A and 9B are formed in the middle part and are mounted using bolts IO passed through holes 11A and IIB.
A, IOB is fixed at the changed position by screwing it into the nut bodies 3A and 3B. The support frame 9A on the - side is case-shaped, and the lower end into which the two guide parts are fitted and the base plate part 12 in which the hole 11A is formed and the base plate part 1 are attached.
It is formed by a pair of front and rear cover plate parts 13 that are connected inward from the inner surface of the lower half of the base plate part 2, and a connecting plate part 14 provided between the lower ends of these cover plate parts 13.
2, there is a pair of upper and lower through holes 1 above the hole 11A.
5a and 15b are formed. Also, the other support frame 9
B is a rectangular plate.

A pair of mounting grooves 16a are provided on both sides of the hole 11B, with open upper and lower end surfaces and inner surfaces in the height direction.
16b is formed. Here, the locking groove 16a.

The distance from the back of 16b to the mounting hole 11B is L,
teeth.

Mounting on one support frame 9A is from hole 11A to through hole 1.
The distances Ll and L to 5a and 15b are equal to each other. A conveying roller 28 made of resin is freely rotatably provided between the support frames 9A and 9B via a roller shaft 27.

That is, by inserting one end of the roller shaft 27, which has been inserted so as to freely rotate freely, into either the through hole 15a or 15b, and dropping the other end into one of the locking grooves 16a or 16b from above, the roller shaft 27 can be rotated freely. In addition, the conveying roller 28 can freely rotate around the roller axis 29.

A support shaft 18 along the roller axis 29 is attached to one support frame 9A.
is installed so that it can freely swing up and down. That is, the substrate section 12
A bearing hole 19 is formed at the lower end of the support shaft 18, and the inner end of the support shaft 18 is fitted into the bearing hole 19 so that it can freely swing up and down. And between the free ends of the cover plate part 13 is a resin-made cedar plate part 2.
3 is attached by insertion, and the outer end of the support shaft 18 is fitted into a vertical recess 24 formed in the vertical plate of the L cedar board portion 23, thereby regulating the vertical swing range of the support shaft 18. . A sprocket 20, which is an example of a passive wheel, is rotatably attached to the support shaft 18.

A transmission roller 21 is fitted onto the boss portion of the sprocket 20 so that both 20 and 21 can freely rotate together.

This transmission roller 21 is made of urethane rubber, and its outer periphery is able to come into contact with and separate from the lower outer periphery of the conveying roller 28 . And an air cylinder that causes contact and separation: /f device j!
117 is the cylinder rubber receiver 2 attached to the outer end of the support shaft 18
2 and the horizontal plate of the L cedar board part 23. Drive bag @2 made into one unit by 17 to 24 mentioned above
A large number of drive devices 25 are disposed on the main body frame 1, forming a pair with conveying rollers 28 via support frames 9A and 9B. Cheno 3°, which is a common driving body interlocked with each sprocket 20, is stretched between a driving sprocket 31 and a driven sprocket 32 via a guide sprocket 33, etc., and operatively connects the driving sprocket 31 to a motor 34. are doing. As a result, the Cheno 3o has an action path 3 that meshes with each sprocket 20.
5a and a return path 35b located below it. 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.

As mentioned above, the conveying roller 2 paired with the driving bag [25]
By arranging the set pitch device 8 on one 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 conveying rollers 28 paired with the driving bag @25 are arranged in a plurality of groups A, B, and 5 in a predetermined arrangement, as shown in FIG. 1, for example.
C...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 43 from an air supply device 42 via a solenoid valve 41, respectively. It is configured so that it can be connected selectively to. 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 electromagnetic valve 41 of the upstream group in the transport direction 47 is operated to separate the air supply hose 43 and the supply/discharge hose 40 by a detection signal 48 from a photoelectronic switch 46 provided in the adjacent downstream group. division] and,
When the photoelectric switch 46 is not detected, the connection is activated (the connection between the air supply hose 43 and the supply/discharge hose 40).

Further, only the solenoid valve 41 corresponding to group N at the downstream end is configured to be operated by the @1 control signal 5° from the control section (sequencer) 49. Furthermore, another optoelectronic switch 51 is arranged in group N at the downstream end, and its detection signal 52
enters the control section 49. A stopper device 55 consisting of a cylinder device @53 and a stopper plate 54 is disposed outside the downstream end of group N, and this cylinder device @53 connects to the control unit 49.
is controlled by the second control signal 56Jζ from the group A, B, C, etc. except for the most downstream group N.
...N-, rollers 60 with brakes are provided in each of them. This TK roller 60 with a brake is positioned in the middle of each group, and the front and rear conveyance rollers 2
8 to form a set pitch P. Further, as shown in FIG. 5, the brake roller 60 is connected to the side frame IA via a pair of support frames 9B in the same manner as the conveyance roller 28.
, IB side fCO-ra shaft 61 is supported, and this roller shaft 6
A roller 62 is fitted onto the roller 1 so as to be rotatable around a roller axis 63, and a brake device 64 is interposed between the roller axis 61 and the roller 62. Further, the braked roller 60 is connected to the optoelectronic switch 46 of the downstream group to apply the brake when the group is in separation motion.
The brake system A64 is configured to operate based on the detection signal 48 from the brake system A64.

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

3 and 4 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 2B from below.

At this time, the chino 30 is constantly driven by the motor 34, and therefore the sprocket 2o engaged with the chino 3o is rotating around the support shaft 18. Further, since the transmission roller 21 is in contact with the lower outer circumference of the conveying roller 28, the group of conveying rollers 28 is forcibly rotated, so that the packet 39 can be conveyed on the conveying path 38.

The packet 39 conveyed on the conveyance path 38 as described above comes into contact with the protruding stopper plate 54 of the stopper device 55, and the packets 39 from the most downstream group N to the group N-1
It stops at a position downstream of the brake-equipped roller 6o. The stopped packet 39 is detected by the group N optoelectronic switch 46 and a separately provided optoelectronic switch 51. The detection signal 52 of the optoelectronic switch 51 is transmitted to the control unit 4
9, and at the same time the four loads at the most downstream are checked, the first control signal 50 is given to the solenoid valve 41 corresponding to group N.
This solenoid valve 41 is moved separately. This results in group N
In.

The air supply to the supply/discharge hose 40 and the air cylinder device 17 is stopped and released, and the support shaft 18
etc. will descend under their own weight, separating the transmission roller 21 from the conveyance roller 28. In other words, the group N of conveying rollers 28 is not driven.

Furthermore, the detection signal 48 of the optoelectronic switch 46 enters the solenoid valve 41 in the adjacent upstream group N-,
This solenoid valve 41 is moved separately, and the conveying rollers 28 group of group N-1 are deactivated in the same manner as described above, and at the same time,
The brake device 64 of the brake-equipped roller 60 of this group N- is activated.

For example, as shown in FIG. 1, two packets 39 are stored on the downstream side, and three groups N, N-, N- from the downstream are in a non-driven state and are transferred to the next one on the transport path 3B. It is assumed that a packet 39 of . This packet 39 is sequentially conveyed from group A to group B. Then, as shown by the virtual line A, the carrying force of the group NLa enters the group NL, and it is detected by the photoelectronic switch 46 of this group N-.
The transport roller 28 group of group N-, which is one upstream, is not driven. As a result, the packet 39 is not forcibly conveyed and coasts, but when it reaches the braked roller 60 of this group N-2, it is braked and is stored in the group N-, as shown by the imaginary line opening. It will not collide with the packet 39 (it will stop when the light is close enough to it).

In this way, they can be stored sequentially, but cutting out from the downstream end of the conveyance path 38 is performed by instructions via the control section 49. That is, the second
The stopper plate 54 is lowered by the control signal 56, and the ml control signal 5o is cut off.

As a result, the electromagnetic valve 41 corresponding to group N is connected and moved, and the conveying roller 28 of this group N is driven to cut out the packet 39. In this way packet 3
9 is sent out, the photoelectronic switch 46 of group N becomes non-detecting, the detection signal 48 disappears, the solenoid valve 41 of group N is connected, and the brake device 64 of the brake-equipped roller 60 of group N- is activated. is released, the conveying roller 28 of this group N-1 is driven, and the packet 39 is sequentially conveyed to group N.

In the above embodiment, the brake equipped roller 60 is of a non-driving type, but as shown in FIG. may be made to act.

Effects of the Invention According to the present invention having the above-mentioned configuration, it is possible to smoothly carry out tact feeding of conveyed objects, and at the same time, the connection of the drive device of the upstream group can be adjusted according to the operation of the inventory detection device of the downstream group. Separation can be performed directly, thereby reducing the number of input and output points to the control unit to the minimum number, providing a simple and inexpensive structure. Moreover, immediately after changing from the drive mode to the non-drive mode, the conveyed object that is brought in and is about to coast can be braked by a roller with a brake, without colliding with the conveyed object that is stopped in front. And it can be stopped sufficiently close.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, FIG. 1 is a schematic side view showing the conveyance state, FIG. 2 is an explanatory diagram of the circuit, and FIG. 3 is a partially cutaway side view of the main part. , 4 and 5 are partially cutaway front views of the same, and FIG. 6 is a partially cutaway front view of the main part showing another embodiment. 1... Main body frame, 17... Air cylinder device l
l, 18... Support shaft, zo... Sprocket (passive wheel) & 21... Transmission roller, 25... Drive device, 2
7... Roller shaft, 28... Conveyance roller, 30...
・Cheno (driver) h38...transport path, 39...
packet

[Object to be transported], 40... Supply/discharge hose. 41...Solenoid valve, 43...Air supply hose, 46...
Photoelectronic switch (stock detection bag fit), 47...
- Conveyance direction, 48... Detection signal, 49... Control unit,
50... First control signal, 51... Optoelectronic switch, 52... Detection signal, 55... Stopper device, 56
...Second control signal, 60...Roller with brake,
62...Roller, 64...Brake device.

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 are installed, and these conveyance rollers are divided into multiple groups in the conveyance direction, and a drive device is attached to each group for each group. A solenoid valve for connecting and separating is provided, and the solenoid valve in the upstream group in the conveyance direction is moved to separate by the detection signal of the presence detection device provided in the adjacent downstream group, and the solenoid valve is to be moved to connect by non-detection. A roller with a brake is provided in each group, and the roller with a brake is configured to operate the brake when the group is in separation motion, and a stopper device connected to the control unit is provided at the downstream end in the conveying direction. A roller conveyor control device characterized by: