JPS6162111A - Position detecting mechanism - Google Patents

Abstract

PURPOSE:To detect the position of articles to be transferred accurately to facilitate carry in/out work by placing position detectors which orthogonally cross the transfer route at the positioning section of transfer route. CONSTITUTION:In case of carry-in operation, the third roller conveyor C3 is driven by a sequence control mechanism 33 so that the items to be transferred moves towards the second roller conveyor C2. Consequently, drums on the third roller conveyor C3 are moved towards the warehouse side A and touch with the sixth position detecting mechanism PD of a detector 29. Since the detector 29 crosses orthogonally against the transfer route, drum cans can be detected even though their position may have a deviation in the width direction of the conveyor, touching without fail with the detector 29 and pushing it down. Thus, articles transferred can be surely and accurately detected irrespective of their shape and size, preventing any interference in carry-in/out works.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a position detection mechanism for detecting the position of an object being transported along a transport path.

Conventionally, when detecting the position of a conveyed object such as a drum can on a roller conveyor, a limit switch or the like is used to detect when a point on the conveyed object comes into contact with the limit switch. There is.

However, if the conveyed object being conveyed is detected by a single point contact using a limit switch, etc., if the conveyed object is an object with a different shape or a concave surface, the detection position will change. There is a problem that the detector may not operate due to a large deviation or deviation from the detector position. In addition, transporting objects such as drums on the transport path,
Since the detector must be carried out, it is not possible to install the detector in a place where it will interfere with the work, and there are restrictions on where it can be installed.

Further, although a detector using a photoelectric element such as a phototube has the advantage of being able to detect an object to be transported without coming into contact with it, there is a problem in that it is prone to malfunction due to lumps, dust, etc.

The present invention has been made in view of the above circumstances, and its purpose is to be able to reliably and accurately detect the position of a transported object, regardless of the thickness, shape, etc. of the transported object. The objective is to provide a position detection structure that does not interfere with loading/unloading operations.

In order to achieve the above-mentioned object, the present invention disposes a detection actuating body at a set position of the conveyance path, perpendicular to the conveyance path, and supports it by an elastic member so as to be freely retractable from the conveyance path. Detection l: By being equipped with a detector that detects the movement of a moving object, the object being conveyed along the conveyance path presses the detection actuating body against the detector against the elastic member to perform position detection. It is something to do.

A first embodiment of the present invention will be described below with reference to the drawings.

01 in Figures 3 and 4. C2 and C3 each have a first position detection mechanism according to the present invention. Second. This is the 30th lar conveyor. The 10th lar conveyor C1 is arranged in the warehouse A at right angles to the side wall of the warehouse A, with one end of the conveyor C1 matching the carry-out port 1 bored in the side wall of the warehouse A.

Further, the 20th lar conveyor C2 is connected to the 10th lar conveyor C1 through a door 2 that opens the carrying-out population 1 so that the conveyance direction coincides with that of the 30th lar conveyor C3. The bacteria 20 are connected to the lar conveyor C2 in the same conveying direction. (Then, stoppers 3 for stopping the drums (materials to be transported) D being transferred are placed at the other end of the 10th lar conveyor C1 and the end of the 30th lar conveyor C3 that is far from the warehouse A. is provided.

Note that 4 is the second. This is a guide member for smoothly transferring drums between the 30th and 30th lar conveyors C2 and C03.

Above 1. Second. 30th-Lar conveyor 01°C2,C
3, each guide frame 5 is supported by a fixed member 6,
A plurality of fixed shafts 7 are fixed to the guide frame 5 in a direction perpendicular to its length direction, and a roller 9 is rotatably attached to each fixed shaft 7 via a bearing 8. Bushes 10 attached to both ends of the fixed shaft 7.
11 restricts axial movement, and two sprockets 12 and 13 are attached to the -@ (left end in FIG. 5) of each roller 9. Also,
14 is a cover that covers sprockets 1 to '12.13.

Roller 9 of each of the above roller conveyors C1, C2, C3
Each roller 9 is attached to the outer sprocket 12 of the
A chain 15 is wrapped around them to connect them.

In addition, as shown in FIG. 6, the sprocket 13 inside the roller 9-1 on one end side of the 10th roller conveyor C1, etc.
A chain 18 is wound around two sprockets 16 and 17 provided at the bottom of one end of the 10th rack conveyor C1.
9, two sprockets 21 and 22 provided at the lower end of the 20th-ra conveyor C2 on the warehouse A side, and the warehouse A of the 20th-ra conveyor C2.
2nd and 3rd 0-ra 9-2.9- counting from the side
3) is wrapped around the inner sprocket 13.13. And these sprockets 13.16.1
7°21.22 and the chain 18. 20th
- Drive transmission hand f22 connecting roller conveyors C1 and C2
3 are made up.

Below the 20th conveyor C2, there are first and second conveyors.
A motor M1 for driving the 0-th conveyor C1 and C2 is installed, and this motor M1 is connected to the motor M of the 20-th conveyor C2 via a chain 24.
It is connected to the inner sprockets 13, 13 of the two adjacent rollers 9 located above the rollers 1. Then, by driving the motor M1, the chain 24.15
, all the rollers 9 of the 20th roller conveyor C2 rotate in the same direction, and all the rollers 9 of the 10th roller conveyor C1 are interlocked via the drive transmission means 23, so that the 20th roller conveyor C2 rotates in the same direction. It is designed to rotate in the same direction as the roller 9 of the conveyor C2.

Below the warehouse A side of the 30th-lar conveyor C3,
30th - Motor M for driving the lar conveyor C3
2 is installed, and this motor M2 is connected via a chain 25 to the inner sprocket 13 of the two adjacent rollers 9 located above the motor M2 of the 30th roller conveyor C3. There is. and motor M2
72 drive, all rollers 9 of the 30th roller conveyor C3 rotate in the same direction via the chain 25.15.

A first position detection mechanism PD+ is installed at the end of the 20th-largest conveyor G2 on the 30th-largest conveyor C3 side. In addition, the sixth storage detection enclosure PDs, at the time of storage,
The center of gravity of one drum D1 is the 20th-large conveyor C2.
After the center of gravity of the next drum D2 moves to the 20th-large conveyor C2, the center of gravity of the drum can O1 is detected. It is set based on the arrangement state of objects), the conveyance speed of the conveyor, the shape of the objects to be conveyed, etc. Furthermore, at the end of the 20th rack conveyor C2 on the warehouse A side, there is a third tank for cleaning drums just before door 2 when entering the warehouse.
A position detector groove PD3 is installed.

A fourth position detection mechanism PD4 is installed at one end of the WS10-lar conveyor C1 to stop the drum truck just before the door 2 when leaving the warehouse, and at the other end of the 10th-lar conveyor C1. , a fifth position detection structure PDs is provided for detecting that the drum is located at the 9i: section of the 10th rack conveyor C1.

At the end of the 30th lar conveyor C3 on the 20th lar conveyor C2 side, there is a 6th position detection structure PDs for setting the drum spacing to reduce the spacing between the drums when leaving the warehouse.
is installed, and at the opposite end of the 30th rack conveyor C3, there is a seventh position detection mechanism P that detects when the drum has reached the stop bar 3 position when leaving the warehouse.
D7 is provided.

The above-mentioned first to seventh position detection separate PD+ of the present invention
1.1, PD, as shown in FIGS. 1 and 2, respectively, a reinforcing frame 2 fixed between a pair of fixing members 6 and 6.
Two support tubes 28 are installed on the rollers 6 via a support plate 27, and two cylindrical detection actuators having a width that is approximately the same as the rollers 9 are installed in parallel between each of the rollers 9. Two support rods 30 fixed to the lower portions of the two detection actuating bodies are connected to the support cylinder 28, and through holes 27a and 26a formed in the support plate 27 and the reinforcing frame 26, respectively.
A spring (elastic member) 31 is provided to penetrate through the support rod 30 and the support cylinder 28, so that the detection actuating body 29 can freely move in and out from the upper end (conveyance path) of the roller 9. When the drum contacts the two detection actuation bodies and pushes down the detection actuation bodies 29, the lower ends of the two detection actuation bodies touch the limit switch (detector) 32.
It is designed to turn on.

The first to seventh position detection structures PD+ to PD7 are each electrically connected to the sequence control mechanism 33, and also detect the upper limit surface of the crane gripping device 34 that grips the drum and avoids the R-downward movement. The upper limit detector 35 detects the fully open state of the door 2, and the fully open detector 36 detects the fully open state of the door 2. It performs sequence control according to the programmed program, and each position detection mechanism PD+ to PD7 and each detector 35°3
G Depending on which signal, each roller conveyor C1゜C2,
Starting and stopping control is performed for the C3 drive motors M+, ~12 and the door 2 opening/closing motor M3.

Next, the operation of the position detection mechanism PDI-PDy of the present invention incorporated in the loading/unloading device configured as described above will be explained.

In the case of warehousing operation, first, after arranging the drums on the 30th-lar conveyor C3 using a forklift or by hand,
Start operation manually. When the operation starts, the sequence control 814133 starts each motor M'+ and M2, so that the motor M1 connects the 20th lar conveyor C2 and the 10th lar conveyor C1 via the drive transmission means 23. In conjunction, the 20th-cou conveyor C2
is driven to convey the articles on the conveyance path from the side to the 10th roller conveyor C1 side, and is driven by a motor M2,
The 30th lar conveyor carries the goods to the 20th lar conveyor C
It is driven to transport to the second side. Therefore, the drum cans on the 30th-ra conveyor c3 are transferred to the warehouse mA side and come into contact with the two detection actuators of the sixth position detection groove PD6,
A horizontal force is applied to the detection actuating body 29. At this time, since the support rod 3o fixed to the lower part of the two detection actuation bodies is guided through the support cylinder 28 and the insertion holes 27a and 26a, the horizontal force received by the detection actuation body 29 causes the support rod 3o to 3
0 descends against the elastic force of the spring 31, and therefore the detection actuating body 29 sinks from the conveyance path.

Therefore, there is almost no contact resistance between the drum and the two detection actuators, and the drum is smoothly transferred without being hindered by the detection actuator 29.

Then, the lowering of the detection actuating body 29 reliably turns on the limit switch 32 of the sixth position detection mechanism PDs, and the detection signal is input to the sequence control mechanism 33. Based on the detection signal, each motor Ml.

M2. Since no command signal is output to M3, the drum that has reached the position of the sixth position detection mechanism PD6 continues to be conveyed past that position.

Next, the drum can is connected to the first position detection mechanism PD+.
When it comes into contact with the two detection actuators (when it comes to the end of the 20th lar conveyor C2 on the 30th lar conveyor C3 side),
As in the case of the sixth position detection mechanism PDs described above, the drum is smoothly conveyed on the detection actuating body 29, and the first position detection mechanism PD+ reliably transmits the detection signal to the sequence control mechanism 33. but the sequence control IR
The groove 33 controls each motor M1゜M based on this detection signal.
2. Since no command signal is output to M3, the drum can remains as it is and the first position detection is lateral PI'l+.
passing through the position of

Subsequently, the drum cylinder presses down the two detection actuators of the second position detection PU structure PD2, and the second position detection starts when the detection signal of the structure PD2 is input to the sequence control lA4133.
Sequence control tll fjl 4R33 stops motor M2. Therefore, the operation of the 30th-lar conveyor C3 is stopped, and only one drum ID separated on the 20th-lar conveyor C2 is transported to the warehouse A side, and the other drums are transported to the 30th-lar conveyor C2. It remains on C3 and is stopped.

Next, when the 20th drum conveyor C2 is detected by the third position detection mechanism PD3 and the detection signal is input to the sequence control 11M433, the sequence controller 133 stops the motor M1. Well, the first
．． The operation of the 20th conveyor C1 and C2 is stopped, and the 2nd
The conveyance of the drums on the 0-lar conveyor C2 is stopped, and the motor M3 is started to listen to the door 2.

When the door 2 is fully opened and the signal from the fully open detector 36 is input to the sequence control FA mechanism 33, the sequence control mechanism 33 stops the motor M3 to keep the door 2 fully open, and at the same time stops the motor M1. It is activated and the drum cans on the 20th lar conveyor C2 are transferred onto the 10th lar conveyor C1 in the warehouse JmA.

Further, when the drum truck passes through the fourth position detection mechanism PD4, a detection signal from the first position detection uK <RP Da a is input to the sequence control ill structure 33, but the sequence ar+J control n side 33 is controlled by each motor. M+.

Do not output command signals to Mz and M3. Then, when the drum comes above the fifth position detection mechanism PDs (when it reaches the other end of the tenth drum conveyor C1), the fifth position is detected by the sequence ailJ according to the detection signal of the structure PDs.
III.
The conveyance of the 20th lar conveyor C1°C2 is stopped, and then the crane gripping device 34 is lowered.

Subsequently, the 7JS10-
The drum that has reached the other end of the container conveyor C1 is grasped and raised. When the crane gripping device 34 is placed at the upper limit, the lifting of the crane gripping device 34 is stopped by a detection signal from the upper limit detector 35, and the drum is moved horizontally and transported to a predetermined position. , detection number 11 from upper limit detector 35 is sequence control υ0814
When entering 7433, each motor of the roller conveyor ~I
+, lVL receives the command, and the first. Second. The 30th-lar conveyor C1°C2, C3 starts operating. Then, the sequence control 814t'433 determines that all drums (8R
The above-mentioned procedure (sequence) is repeated until the drums are carried into A, and once all the drums have been carried in.

The staff member manually turns off the loading/unloading device.

Next, in the case of unloading operation, first, a crane transports a drum from a predetermined position in fARA, and when it is placed on the 10th drum conveyor C1 on the 5th position detection mechanism PDs, the 5th position detection mechanism In response to the detection signal from the PDs, the crane grip MiM34 releases the drum and starts to ascend.

When the crane gripping device 34 reaches the upper limit position, the sequence control mechanism 33 starts the motor M1 based on the detection signal from the upper limit detector 35. 20th drive conveyors C1 and C2.

1st. 20th - Ra conveyor CI, C2 moves, 1st
The drums on the 0-ra conveyor C1 are transported toward the outside of the warehouse A, and when the drums ff1D reach the position of the fourth position detector tPD<, the fourth position detector PDa
The sequence system (2n ljl I
M33 stops motor M1, and M1, 20th-
At the same time as stopping the 7C1, 02, the motor M3
Activate and listen to Door 2.

When the door 2 is fully opened, the sequence control mechanism 33 stops the motor M3 based on the detection signal from the fully open detector 36, starts the motor M1, and starts the first motor. The rotation of the 20th lar conveyor C1, C02 is restarted, and the drums on the 10th lar conveyor C1 are transferred to the 20th lar conveyor C2 outside the warehouse A.

Next, when the drum on the 20th lar conveyor C2 passes over the third position detection mechanism PD3, the detection signal of the third position detection mechanism PD3 is transmitted to the sequence 811 lit machine h.
? It is input to I33, but the sequence control line 1
) 1 structure 33 operates each motor M+ based on this signal.

M2. No command is output to Ml. When the drum reaches the second position detection mechanism PD2, the sequence control mechanism 33 starts the motor M3 and closes the door 2 based on the detection signal from the second position detection mechanism PD2.

Subsequently, when the drum truck reaches the first position detection position PD+, the sequence control mechanism 33 starts the motor M2 based on the detection signal of the first position detection failure position PD+.
30th-Lar conveyor C3 is operated. Therefore, the drum can is transferred from the 20th lar conveyor C2 to the 30th lar conveyor C3.

Then, when the drum reaches the sixth position detection mechanism PD6, the sequence control fil 4M 33 controls the motor Ml,
Stop M2, t, 1st. Second. 30th-Lar conveyor C
Stop 1, C2, and C3. Therefore, the above drum can is
It stops at the position specified by the sixth position detection condyle PD6.

Next, the crane gripping device 34 is lowered to the upper limit position while gripping the next drum, and the above-described procedure is repeated.

In this way, the 1st... The drums are lined up at intervals set by the sixth position detection structure PD+ and 'PDs, and when the most advanced drum structure reaches the position of the seventh position detection structure PD7, the motor M++M2 is stopped. Ru. Then, the drums lined up on the 30th rack conveyor C3 are transported by a forklift or the like, and the unloading operation is completed.

As described above, the collection of people's works is carried out, but at this time, even if the drums (objects to be conveyed) D being conveyed on the conveyance paths of the roller conveyors C1, C2, and C3 are shifted in the width direction of the conveyance paths. Even if the rollers 9 of each position detection mechanism PD+ to PD7 are conveyed by
Since it reliably contacts the two detection actuation bodies disposed parallel to the roller 9 and smoothly pushes down the detection actuation bodies 29, no unreasonable force is applied to the drum by the two detection actuation bodies, and Since there is almost no frictional resistance with the detection actuation body 29, the drum can smoothly slide over the detection actuation body 29.
IF2 is sent. On the other hand, since the detection actuator 29 is reliably pressed down, the limit switch (detector) 32 is properly turned on without causing malfunction.

In the above embodiment, the detection actuating body 29 is described as having a cylindrical shape, but the shape is not limited to this, and the cross-sectional shape may be a semicircular shape or a triangular shape with a smooth apex. Any structure is acceptable as long as it can be easily lowered and submerged from the conveyance path, and does not obstruct the conveyed object when it passes through. Further, FIG. 7 shows a second embodiment of the present invention, and in this second embodiment,
Instead of the detection actuating body 29 of the first embodiment shown in FIG.
A support frame 40 fixed to the upper end of the support rod 30, a support shaft 41 fixed to both ends of this support frame 40, and this support shaft 41
The difference is that a detection actuating body 44 consisting of a detection roller 43 rotatably supported via a bearing 42 is provided. When the object to be conveyed comes into contact with the detection roller 43 of the position detection structure configured as described above, the detection roller 43 moves downward by 1° while rotating, so that the object to be conveyed can be detected even more smoothly. By passing over the rollers 43 and having the support frame 40 come into contact with the detector 32, the Ua to be sent object can be detected more reliably.

As explained above, in the present invention, since the detection actuator is disposed at the setting surface of the conveyance path orthogonally to the conveyance path, the object to be conveyed is shifted in the width direction of the conveyance path and is not transported in the 11Q. Even if the sensor is moved, the sensor will surely contact the detection actuator and push the detection actuator down. Therefore, the position of the transported object can be detected accurately regardless of the size and shape of the transported object. In addition, since the detection actuating body is supported by an elastic member so as to be freely retractable into and out of the conveyance path, the detection actuation body sinks below the conveyance path with a small force due to the object to be conveyed, which prevents the conveyance of the object to be conveyed. Not only does it not become an obstacle, but the position can be detected reliably and accurately. In general, if necessary, the actuation detection body can be configured with a rotatable roller, and when the conveyed object comes into contact with the roller, the roller can be rotated and lowered. This eliminates the application of unreasonable force, allowing for smoother conveyance, and also prevents the rollers from being subjected to unreasonable force from the horizontal direction due to the conveyed object, making it possible to perform more reliable position detection. Furthermore, it has excellent effects such as not interfering with the work of transporting and transporting objects onto the transport path.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention. FIG. 1 is a sectional view explaining the first to seventh position detection structures, and FIG. -A sectional view taken along the line If, Fig. 3 is a schematic configuration diagram of the loading/unloading device, Fig. 4 is a schematic plan view thereof, Fig. 5 is a GL′i side view of the rollers of the roller conveyor, and Fig. 6 is a drive transmission A schematic side view of the means, and FIG. 7 is a sectional view showing a second practical IM example of the present invention. 29...Detection operating body, 31...Spring (
Elastic member), 32...Limit switch (detector), D...Drum (object to be transported), PD+~
POy...1st to 7th position detection structure, 43...
...Detection roller, 44...Detection actuation body. Figure 1 Figure 2 U

Claims (1)

[Claims] 1) In a position detection mechanism that detects when an object being transported through a transport path reaches a predetermined set position, a detection actuating body is located at a set position on the transport path. The sensor is disposed perpendicular to the conveyance path, is supported by an elastic member so as to be freely retractable from the conveyance path, and detects when the object to be conveyed moves the detection actuation body against the elastic member. A position detection mechanism characterized in that a detector is provided in the vicinity of the detection operating body. 2) The position detection mechanism according to claim 1, wherein the detection actuator is constituted by a rotatable roller.