JP2855727B2 - Reciprocating motion control device in the drying box loading / unloading machine to the sample dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is used in a cereal drying preparation facility which can receive cereal from each producer and ship it through drying, selection and storage processes. The present invention relates to an improvement in a drying box loading / unloading machine which carries a drying box containing a small amount of a sample for voluntary inspection collected from the receiving grain into and out of each drying chamber of a sample dryer.

(Prior Art) Conventionally, as this type of drying box carry-in / out machine, a holding means for holding a drying box housed in a drying chamber of a sample dryer is provided.
By transporting to the target loading / unloading position of the drying chamber by the transporting means and reaching the loading / unloading position, by reciprocating the holding means between the loading / unloading position and the entrance of the drying chamber by the reciprocating means, It is known that a holding box carries a drying box into and out of a drying chamber.

In such a conventional apparatus, when the drying box is carried into the drying chamber of the sample dryer, the holding means holding the drying box is transported to the target carry-in / out position by the transport means.
Then, the holding means advances from the carry-in / out position to the target entrance / exit of the drying chamber by the reciprocating means, and when the advance is completed, the holding is released and the drying box is stored in the drying chamber.

When the necessary drying box such as the drying box containing the dried sample is subsequently carried out of the drying chamber after the carrying in of the drying box in this manner, the holding means is moved to the original carrying-in / out position by the reciprocating means. Once it retreats, it is transported by the transport means to a new target loading / unloading position. Then, the holding means advances from the loading / unloading position to the entrance of the target drying chamber, and when the advancing is completed, the holding means holds the drying box and retreats to the loading / unloading position as it is.

(Problems to be Solved by the Invention) As described above, the conventional holding means retreats to the original carry-in / out position after the carry-in of the drying box into the drying chamber, so that it is necessary to shift from the carry-in operation to the carry-out operation. Involves unnecessarily moving. As a result, time is wasted in carrying in and taking out the dry box, and there has been a problem that the efficiency of the self-verification work of the self-verification sample is poor.

 The present invention aims to eliminate this problem.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

That is, the present invention provides a holding device for holding a drying box accommodated in a drying chamber of a sample drying machine. The conveying means conveys the holding box to a target loading / unloading position of the drying chamber. By reciprocating the holding means between the loading / unloading position and the entrance / exit of the drying chamber, the holding box carries the drying box into / from the drying chamber into / from the drying chamber. When the means reaches a predetermined position different from the retreat end position when the means retreats from the entrance of the drying chamber toward the loading / unloading position, a retreat stop detecting means for outputting a retreat stop signal; and Holding detection means for detecting the presence / absence and outputting a non-holding detection signal when not holding, and when receiving both the retraction stop signal and the non-holding detection signal, the holding means moves to the predetermined position. And control means for controlling the reciprocating means so as to stop, is made comprising a.

(Operation) In the present invention configured as above, when the control means receives both the retraction stop signal from the retraction stop detection means and the non-holding detection signal from the holding detection means, the holding means sets the entrance and exit of the drying chamber. The reciprocating means is controlled so as to stop at a predetermined position in the middle of retreating from the to the carry-in / out position.

Thus, when the drying box is carried into the drying chamber, the holding unit does not retreat to the carry-in / out position at the time of carrying-in and stops at the above-described predetermined position.

Therefore, in the present invention, the holding means can reduce the moving distance when shifting from the loading operation of the drying box to the unloading operation,
This improves the efficiency of loading and unloading work.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 denotes a sample dryer, which forms a large number of drying chambers 2 for drying a sample for voluntary inspection in a matrix, and stores a drying box 3 having a net-like bottom in each of the drying chambers 2. Hot air passes through each drying box 3 accommodated in each drying chamber 2 toward the bottom or the top, so that the sample for voluntary inspection in the drying box 3 is dried.

Reference numeral 4 denotes a drying box loading / unloading device for loading the drying box 3 containing the sample for voluntary inspection into the drying chambers 2 of the sample dryer 1 or for transporting the drying box 3 out of the drying chamber. Consists of elements.

Reference numerals 5A and 5B denote a pair of upper and lower running rails, which are arranged in front of and below the sample dryer 1 in a horizontal direction. On the running rails 5A and 5B, active members 6A and 6B
Are slidably mounted, and a rack 7 is mounted on the active members 6A and 6B.

A motor 8 for transporting in the left-right direction is fixed to the sliding member 6B, and a gear 9 is mounted on the shaft of the motor 8 so that the gear 9 meshes with a rack 10 provided along the side surface of the traveling rail 5B.

With such a configuration, the rack 7 can move in the left-right direction by the forward / reverse rotation of the right-left transfer motor 8.

Reference numeral 11 denotes a transfer table having a through-hole penetrating the rack 7, penetrating the through-hole into the rack 7, and mounting a vertical transfer motor 12. A gear is attached to the shaft of the motor 12.
13 is attached so that the gear 13 meshes with the rack 7. With such a configuration, the transport table 11 can be moved in the vertical direction by the forward and reverse rotation of the vertical transport motor 12.

Numeral 14 denotes a linear motor mounted on the carriage 11 and capable of moving the shaft 14A in the front-rear direction. An electromagnet 15 for attracting the drying box 3 by electromagnetic force is fixed to the end of the shaft 14A. Note that an air cylinder may be used instead of the linear motor 14.

Reference numeral 16 denotes a forward stop stop limit switch mounted on the carriage 11, and the electromagnet 1 is driven by the forward movement of the shaft 14 A of the linear motor 14.
5 moves forward from the loading / unloading position of the drying chamber 3 to the entrance / exit of the drying chamber 3, and when the operating piece 17 attached to the rear end of the shaft 14A of the linear motor 4 contacts the actuator, An electric signal to the effect is output.

Reference numeral 18 denotes a first retreat stop limit switch mounted on a switch mounting member 19 provided integrally with the carriage 11, and the electromagnet 15 moves from the entrance of the drying unit 3 to the loading / unloading position by retreating the shaft 14A of the linear motor 14. As shown in FIG. 2, the distance L1
When the operating piece 20 attached to the front end side of the shaft 14A of the linear motor 14 comes into contact with the actuator, an electric signal is output in response to the contact.

Reference numeral 21 denotes a second retreat stop limit switch mounted on the switch mounting member 19, and the electromagnet 15 retreats by a distance L2 from the entrance of the drying chamber 3 as shown in FIG. When the operating piece 20 attached to the shaft 14A of the linear motor 14 comes into contact with the actuator, an electric signal is output in response to the contact.

Each of the operating pieces 17 and 20 is configured so that its mounting position can be easily changed.

Next, a block diagram of the electric system according to the embodiment of the present invention will be described with reference to FIG.

In FIG. 3, reference numeral 30 denotes a control circuit composed of a microcomputer or the like, which controls each unit according to a predetermined procedure as described later.

On the input side of the control circuit 30, each limit switch 16, 1
Connect 8 and 21 respectively. Further, on the output side of the control circuit 30, it is determined whether or not the left / right transport motor 8, the up / down transport motor 12, the linear motor 14, the electromagnet 15, and the electromagnet 15 to be controlled are adsorbing the drying box 3 to be controlled. Each of the holding detection sensors 31 to be detected is connected.

Next, an operation example of the embodiment of the present invention configured as described above will be described.

First, the operation of carrying the drying box 3 containing the sample for voluntary verification to be dried into the target drying chamber 2 will be described.

In this case, the drying box 3 is attracted to the electromagnet 15, and when the electromagnet 15 reaches the target carry-in / out position of the drying chamber 2 by each drive of the left-right transport motor 8 and the up-down transport motor 12, The motors 8 and 12 stop driving. next,
When the linear motor 14 is driven, the shaft 14A starts moving forward,
When there is a detection signal from the forward stop switch 16, the shaft 14A of the linear motor 14 stops moving forward, and the drying box 3 is completely accommodated in the target drying chamber 2.

Thereafter, when the energization of the electromagnet 15 is released, the shaft 14A of the linear motor 14 starts retreating. At this time, the holding detection sensor 31 outputs a signal indicating that the drying box 3 is not held. Thereafter, when the operating piece 20 attached to the shaft 14A comes into contact with the actuator of the second reverse stop limit switch 21 and a detection signal to that effect is output, the electromagnet 15 is moved to the position shown by the one-dot chain line in FIG. Stop retreat. Thus, the operation of carrying the drying box 3 into the target drying chamber 2 is completed.

Next, the operation of carrying out the drying box 3 containing the dried sample for voluntary verification or the empty drying box 3 from the target drying chamber 2 after the completion of the above-described carrying-in operation will be described.

In this case, as described above, the electromagnet 15 retracted to the one-dot chain line in FIG. 2 reaches the target carry-in / out position of the drying chamber 2 by driving the left-right transfer motor 8 and the up-down transfer motor 12. And stop there. Next, the linear motor 14 is driven to start the forward movement of the shaft 14A, and when there is an output signal from the forward stop switch 16, the forward movement of the shaft 14A is stopped.

Thereafter, when the electromagnet 15 is energized, the electromagnet 15 attracts the drying box 3. When the shaft 14A of the linear motor 14 starts retreating, the holding detection sensor 31 outputs a signal indicating that the drying box 3 is being held. Thereafter, when the operating piece 20 attached to the shaft 14AI comes into contact with the actuator of the first reverse stop limit switch 18, and a detection signal to that effect is output,
The electromagnet 15 retreats to the position shown by the solid line in FIG. 2 and stops. Thereafter, the dry box 3 attracted to the electromagnet 15 is transported to a predetermined position.

As described above, in this embodiment, the drying box 3 is carried into the target drying chamber 2, and after being carried in, the electromagnet 15 is retracted by the distance L2 to the position indicated by the dashed line shown in FIG. .
Therefore, when shifting from the loading operation to the unloading operation of unloading the drying box 3 from the target drying chamber 2, the moving distance can be reduced.

Next, another embodiment of the sample dryer applied to the embodiment of the present invention will be described with reference to FIG.

This sample dryer has a common drying chamber 41 that can simultaneously dry a plurality of drying boxes 40, and the drying chamber 41
A common exhaust path 42 is provided at the lower side of the. Further, a heater serving as a heating source is disposed at a suction port 43 provided on the left end side of the drying chamber 41, and an exhaust duct 44 connected to an exhaust port of an exhaust path 42 is provided.
An exhaust fan 45 is provided therein. Further, in the exhaust air passage 42,
An inclined plate 46 that is inclined low from the exhaust port to the back is arranged.

Then, the drying units 47 configured as described above are vertically stacked to form a sample dryer.

In the drying unit 47 configured as described above, the exhaust fan
By driving the 45, the hot air from the heating source passes through each of the drying boxes 40 and is exhausted to the outside via the exhaust air passage 42. here,
Since the pressure loss of the drying box 40 is made uniform by the inclined plate 46, in other words, the reduction rate of the voluntary test sample in each drying box 40 becomes constant, and the drying loss rate control becomes easy.

In the above-described embodiment, the dry box is attracted by the electromagnet 15, but the present invention is not limited to this, and means for holding the dry box for carrying in and out of the dry box, such as gripping the dry box, is eliminated. Not something.

(Effects of the Invention) As described above, in the present invention, after the holding unit carries the drying box into the drying chamber, the holding unit does not retreat from the entrance of the drying chamber to the loading / unloading position, and does not retreat to a predetermined position on the way. When the operation shifts from the loading operation of the drying box to the unloading operation, the moving distance of the holding means can be shortened, and the efficiency of the loading and unloading operation of the drying box can be improved.

Therefore, when the present invention is applied, the efficiency of the voluntary test work of the voluntary test sample is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a right side view thereof, FIG. 3 is a block diagram of an electric system thereof, and FIG. It is a front view. 1 ... sample dryer, 2 ... drying room, 3 ... drying box,
4 Drying box loading / unloading device 8 Horizontal motor 12 Vertical motor 14 Linear motor 16 Forward stop limit switch 18 First retraction stop Limit switch 21... Second reverse stop limit switch 30... Control circuit 31... Holding detection sensor.

Claims (1)

(57) [Claims] A holding means for holding a drying box housed in a drying chamber of a sample dryer is transported by a transporting means to a target loading / unloading position of the drying chamber, and when reaching the loading / unloading position, a reciprocating means is used. In the drying box carry-in / out device for the sample dryer, which carries the drying box into and out of the drying chamber with the holding means by reciprocating the holding means between the carry-in / out position and the entrance / exit of the drying chamber, When retreating from the entrance of the drying chamber toward the loading / unloading position, when reaching a predetermined position different from the loading / unloading position, a retraction stop detection unit that outputs a retraction stop signal, and the holding unit holds the drying box. Holding detection means for detecting the presence / absence and outputting a non-holding detection signal when the signal is not held; and receiving both the retraction stop signal and the non-holding detection signal, the holding means stops at the predetermined position. It said control means for controlling the reciprocating means becomes provided with a reciprocating control device so.