JP3413425B2 - Paper strip transfer method and paper strip automatic transfer apparatus using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper piece transfer method and a paper piece automatic transfer apparatus for extracting a predetermined number from a plurality of paper pieces stored in a batch.

[0002]

2. Description of the Related Art As a method of knowing the efficacy and efficacy of an antibiotic, it is known by measuring the concentration of the antibiotic that remains or is excreted in the blood, urine and organs of the animal to which the antibiotic is administered. There is a way. One of the measuring methods is to put a piece of paper (or "disk") with a diameter of about 6 mm, which is obtained by diluting a tissue extract or collected body fluid to an appropriate concentration and permeating it on an agar plate medium mixed with bacteria. After that, the agar plate medium is cultured, and the growth of the bacteria is inhibited in proportion to the concentration of the antibiotic that has penetrated the disc, and the size of the area (inhibition circle) is measured to know the efficacy of the antibiotic. There is a law.

In one example of this disc method, first, the body fluid of an animal / patient administered with an antibiotic is sampled and diluted, or a fluid extracted from a tissue is permeated into the disc. The disc that has been permeated with the standard solution or the sample solution is gently placed on a blotter paper to remove excess water. Next, as shown in FIG. 9, the permeated disc 1 is placed on a plate 5 of the agar formed on the Petri dish 3 at a predetermined position (usually 36 mm × 36).
1 piece at 4 mm). At this time, the disc
A pair of standard solutions in which one side of the square is infiltrated 1
a and 1a are placed on the other diagonal with a pair of ones 1b and 1b infiltrated with the sample liquid, that is, a total of four. The processing must be done at about the same time, so the work is done by two experimenters.

An agar plate 5 having four disks 1 placed diagonally is cultured under predetermined conditions. After culturing, the size of the inhibition circle formed by inhibiting the growth of the bacteria is measured in proportion to the antibiotic concentration, and the antibiotic concentration of the sample is calculated. This makes it possible to know the effectiveness and efficacy of antibiotics.

[0005]

In the conventional disc method for knowing the effectiveness and potency of antibiotics, the disc was manually placed on an agar medium by an experimenter. For this reason,
There is a problem that labor saving cannot be achieved, working time is long, and the mounting position of the disc varies. Therefore, it has been desired to develop a device that can automatically place a piece of paper. However, there have been various problems to be solved in order to realize the automatic paper piece transfer device. That is, it is not shown that the breathable disc is securely held and that the held disc is surely transferred to a predetermined position on the agar medium. Further, as a further demand, it is necessary to obtain a highly reliable transfer device having a simple structure, without requiring a complicated and precise valve structure, and having a simple structure. And in order to carry out smooth transfer work continuously,
It is essential to detect misholding disks.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. The disk can be securely held and transferred, and the disk can be constructed with a simple structure that does not cause clogging and the like. It is possible to provide a paper piece transfer method and a paper piece automatic transfer device that are capable of detection.

[0007]

In order to achieve the above object, one end of a flexible hose communicates with a suction nozzle for a piece of paper, and the other end of the flexible hose is bifurcated to one side. Is connected to a pump to open the other to the atmosphere, the hose on the side exposed to the atmosphere is closed, the inside of the hose is negatively pressured by the pump, and the suction nozzle holds the paper piece from the paper piece supply section. Then, by closing the hose on the side connected to the pump and opening the hose on the side open to the atmosphere, the suction holding of the piece of paper by the suction nozzle is released by setting the inside of the hose to atmospheric pressure. The paper piece transfer method is configured to transfer the paper piece from the paper piece supply unit onto the medium.

In this paper piece transfer method, the inside of the hose becomes negative pressure because the open side of the other end of the hose is closed.
The piece of paper is suction-held by the air sucked from the suction nozzle by the pump. On the other hand, the pump side of the other end of the hose is closed, and the open side of the other end of the hose is opened, whereby atmospheric pressure is introduced into the hose, and the paper piece that has been suction-held by the impact of the introduced atmosphere is removed. Be sure to leave the suction nozzle without getting caught at the tip of the suction nozzle, and place it on the agar medium.

The paper piece transfer method described above may be configured such that the atmospheric pressure in the hose is detected by the atmospheric pressure detection sensor when the paper piece body is held by suction, and the suction is released when the pressure exceeds a predetermined value. With this configuration, when the suction nozzle is unable to adsorb a piece of paper, it is possible to detect that the air pressure inside the hose exceeds a preset value, and it is possible to detect an error in holding the piece of paper by the suction nozzle. become.

Further, in order to achieve the above object, in a paper piece automatic transfer device for removing a predetermined number from a plurality of paper pieces in a paper piece supply unit and transferring each paper piece to each predetermined position on a medium, A suction nozzle that adsorbs and transfers a predetermined number of paper pieces onto the medium, a pump that generates a suction force for the paper pieces, one end communicates with the suction nozzle, and the other end branches into two. , One of the branched ones is connected to a pump and the other of the branched ones is opened to the atmosphere and has flexibility, and either one of the branched two ends of the hose is selectively sandwiched to close the hose. And a pinch valve that operates.

Therefore, the branched one or the other of the other ends of the hose is selectively closed by the vacuum pinch valve, so that the vacuum suction when holding the paper piece and the introduction of the atmosphere when the holding of the paper piece is released. And can be realized with a simple structure.

In the above-described automatic paper piece transfer device, the paper piece supply unit aligns the paper pieces in a line in the groove and conveys the paper pieces to the suction position of the suction nozzle, and the alignment linear feeder having at least one groove. It is possible to adopt a configuration in which a concave portion is formed along the aligned linear feeder at approximately the center of the groove bottom surface of the aligned linear feeder and at least near the suction position of the suction nozzle.

Therefore, when the paper piece is sucked and held by the suction nozzle, the air passing through the paper piece is sucked from the concave portion, and the intake from the side surface of the paper piece is reduced. As a result, misfeeding that simultaneously adsorbs adjacent paper pieces in the groove does not occur.

Further, the above-described paper piece automatic transfer device may be provided with an atmospheric pressure detection sensor for detecting the atmospheric pressure in the hose when the paper piece body is sucked and held. According to this configuration, since the vacuum in the hose during suction holding of the paper piece is detected by the atmospheric pressure detection sensor, it becomes possible to detect the pressure change in the hose when the suction nozzle cannot adsorb the paper piece, It becomes possible to detect a mistake in holding the piece of paper by the suction nozzle.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a paper piece transfer method and a paper piece automatic transfer apparatus according to the present invention will be described in detail below with reference to the drawings. 1 is a perspective view of the paper piece automatic transfer device according to the present invention as viewed from the side, FIG. 2 is a side view of the paper piece automatic transfer device shown in FIG. 1, and FIG. 3 is an enlarged view of essential parts of FIG. FIG. 4 is a view on arrow AA in which a part of FIG. 2 is omitted. For convenience of description, the left-right direction of FIG. 3 is the X-axis direction,
The description will be given assuming that the vertical direction of FIG. 3 is the Z-axis direction.

A disk supply feeder 13 for supplying a piece of paper (hereinafter also referred to as "disk") is installed on the base 11, and an upper part of the disk supply feeder 13 is a loading section (ball section) 15. A plurality of disks 17 are collectively loaded into the ball portion 15. Ball part 15
The bottom plate of (1) is adapted to be moved back and forth in the minute circumferential direction about the central axis 19 while vibrating in the vertical direction. Therefore, the plurality of disks 17 that are collectively loaded into the ball portion 15 are individually loosened and moved in one direction (counterclockwise direction in the case of FIG. 1) while being moved outward in the radial direction of the ball portion 15. To do.

A discharge passage 21 is provided on the outer circumference of the ball portion 15. Therefore, the disk 17 that is moved toward the outer peripheral side of the ball portion 15 and rotates is discharged from the discharge path 21 to the outside. The discharge path 21 is branched into two and branched into a branch path 2.
It becomes 3. The discharge passage 21 and the branch passage 23 form a flow dividing portion 27. The branch path 23 is an aligned straight feeder 25.
Respectively connected to. That is, the disc 17 sent from the ball portion 15 reaches the aligned straight feeder 25 via the flow dividing portion 27. This disc supply feeder 13
And alignment straight feeder 25
It constitutes the supply unit.

On the base 11, a pair of columns 29, 29 are erected. A pair of rail rods 31, 31 are provided between the columns 29, 29. The parallel direction of the rail rods 31, 31 is defined as the X-axis direction, and a slide block 33 is attached to the rail rods 31, 31 so as to be slidable in the X-axis direction.

An X-axis drive cylinder 35 is fixed to one of the columns 29, 29, and the drive shaft of the X-axis drive cylinder 35 is fixed to the slide block 33. That is, the slide block 33 is moved in the X-axis direction along the rail rods 31 by driving the X-axis drive cylinder 35.

Below the slide block 33, a nozzle block 39 is vertically downward via a vertical shaft 37.
It is mounted so as to be movable in the axial direction. A drive cylinder 41 of a vertical shaft 37, which is the Z-axis, is fixed to the upper portion of the slide block 33, and a nozzle block 39 is fixed to the vertical shaft 37. That is, the nozzle block 39
Is driven by the Z-axis drive cylinder 41,
Moved axially.

In the lower part of the nozzle block 39, four suction nozzles 43 in the Z-axis direction are arranged at diagonal diagonal positions (for example, 3).
6 × 36 mm) and arranged at the same height. The lower ends of these suction nozzles 43 are suction openings. If the size of the disk 17 is 6 mm in diameter,
The suction nozzle 43 has an inner diameter of about 2 mm and an outer diameter of about 4 mm. The diameter is not limited to such a numerical value as long as the disk can be sucked.

A hose 45 is attached to each suction nozzle 43.
Are connected, and the hose 45 is connected to the manifold 47. A main hose 49 is connected to the manifold 47, and the main hose 49 is connected to a vacuum pump 51. A pinch valve 53 is provided on the main hose 49 between the manifold 47 and the vacuum pump 51, and the pinch valve 53 can switch the main hose 49 to the vacuum pump 51 or the atmosphere side.

On the other hand, the petri dish setting section 5 is provided on the base 11.
5 is provided, and a stopper capable of setting the petri dish 57 at a predetermined transfer position of the disc 17 is arranged on the upper surface of the petri dish setting portion 55. This petri dish setting part 55
The slide block 33 can be slid and arranged above the petri dish 57 set at.

The aligned linear feeder 25 has two rows of transport paths for transporting the disks 17 arranged in a row. This transport path is connected to each of the branch paths 23 described above.
A stopper 69 is provided at the tip of the straight-aligned linear feeder 25.
The movement of the discs 17 at the tips arranged in line is regulated. Also,
A cover 73 is placed on the upper surface of the alignment straight feeder 25.

In other words, in the straight-aligning linear feeder 25, the frontmost disc 17 is dammed up so as to be packed forward, and the cover 73 is provided to prevent the adjacent discs 17 from overlapping. Will be packed. Therefore, if the disk 17 is taken out from this front-aligned section,
The empty space will be filled up by the subsequent disk 17. The cover 73 is provided with four take-out holes 75 (see FIG. 1). Extraction hole 7
No. 5 is arranged at a position where a pair of disks 17 at the same position can be taken out from each row of the aligned rectilinear feeders 25. By providing a slight gap between the cover 73 and the aligned linear feeder 25 so that the moving groove of the disc 17 can be seen, when the disc 17 is clogged, the clogging position can be confirmed from this gap, and You can also clear the blockage.

A disc detection sensor 71 (see FIG. 2) for detecting the presence or absence of the discs 17 in the aligned state is provided above and below the aligned rectilinear feeder 25. Further, the base 11 is provided with a control device 77. Control device 7
7 is a disk supply feeder 13 and an X-axis drive cylinder 3
5, the Z-axis drive cylinder 41, the vacuum pump 51, the disk detection sensor 71, etc. are electrically connected.

Next, the suction holding mechanism of the disc 17 will be described. FIG. 5 is a circuit diagram of an air pressure system for distributing, switching, and detecting air pressure, FIG. 6 is an enlarged view of a main portion of a vacuum pinch valve, and FIG. 7 is a perspective view of an aligned straight feeder having a recess.

As shown in FIG. 5, the manifold 47 has five branch connection ports 81a, 81b, 81c, 81d, and 8a.
1e, of which branch connection ports 81a to 81d
Is connected to the suction nozzle 43. The branch connection port 81e is connected to the atmospheric pressure detection sensor 83. All of these branch connection ports 81a to 81e are connected to the main hose 49 via the main connection port 85.

Here, the atmospheric pressure detection sensor 83 is electrically connected to the control device 77, detects the pressure in these pneumatic circuits, and sends the detection signal to the control device 77. The control device 77 confirms the disc suction / holding operation based on the detection signal sent from the atmospheric pressure detection sensor 83. That is, when the disk 17 is suction-held by the suction nozzle 43, if one of the four suction nozzles 43 does not adsorb the disk 17, the pressure in the air circuit does not reach a predetermined negative pressure and is the atmospheric pressure. Stays close to. That is, the control device 77
Detects the pressure in the pneumatic circuit when the disk is held by the atmospheric pressure detection sensor 83,
It is possible to detect whether or not the suction-holding is securely performed.

One end of the main hose 49 communicates with the suction nozzle 43 via the manifold 47, and the other end becomes branch hoses 47a and 47b branched in two directions. The main hose 49 has one branch 47a connected to the vacuum pump 51 and the other branch 47b open to the atmosphere. The branch hoses 47a and 47b are made of a flexible material (for example, silicone rubber). The branch hoses 47a and 47b are the same as the pinch valve 5 described above.
By selectively blocking by 3 (see FIG. 6), the branched one 47a or the other 47b is closed.

Therefore, in the pneumatic circuit, the branch hose 47b which is open to the atmosphere is closed by the pinch valve 53, so that the pressure becomes low, and the branch hose 47b is unblocked and connected to the vacuum pump 51. The atmospheric pressure is introduced by closing 47a.

Disc 17 sent from ball section 15
Are aligned with the straight line feeder 25 and are conveyed as described above. As shown in FIG. 7, a concave portion 87 extending along the aligned linear feeder 25 is formed in a substantially central portion of the bottom surface of the groove in which the disks 17 of the aligned linear feeder 25 are lined up. The aligned rectilinear feeder 25 is formed with a recess 87 so that air can flow into the lower surface of the disk 17. In other words, when the upper surface of the air-permeable disk 17 is suction-held, the air sucked through the disk 17 passes through the recess 87. The recess 87 is said to extend along the groove of the straight-advancing feeder 25, but in addition to this, the recess is provided only at a position near the extraction hole 75 into which the suction nozzle 43 is inserted, and the recess is sucked through the disk 17. It suffices to secure a flow path for the air that flows.

Next, the operation of the paper piece automatic transfer device 91 thus constructed will be described. FIG. 8 is a conceptual diagram showing a process in which the collectively loaded disks are transferred to a petri dish. First, as a preparation for the operation, the disk 17 is put into the ball portion 15 of the disk supply feeder 13 and the origin of the apparatus is returned. Disc 17 in ball portion 15
Is sent from the discharge path 21 to the flow dividing portion 27 while being loosened by being vibrated. Disk 17 reaching the flow dividing unit 27
Are sorted and sent in a line to the branch path 23.

The disks 17 sent to the branch path 23 enter the aligned linear feeder 25 in two rows, and are front-packed by the stopper 69 at the tip. Aligned straight feeder 2
When the disc 17 is moved to the predetermined position of 5, the disc detection sensor 71 detects the disc 17 and the drive of the disc supply feeder 13 is stopped. As a result, the excessive supply of the disk 17 is prevented. When the disks 17 are supplied and aligned to this position, the return to the origin of the device is completed. Further, during the series of operations, the suction nozzle 43 also performs the origin returning operation.

Here, the petri dish 57 on which the agar plate medium 93 has been formed is placed on the petri dish setting section 55 with the lid removed, and when the operation switch of the control device 77 is pressed, the four suction nozzles 43 are lowered by a predetermined amount. Then, the upper surface of the disk 17 in the aligned straight feeder 25 is lightly contacted via the take-out hole 75.

Next, the vacuum pinch valve 53 is operated to close the branch hose 47b that is open to the atmosphere and open the branch hose 47a connected to the vacuum pump 51, so that the vacuum pressure is transmitted to the suction nozzle 43. The disk 17 is sucked and held by the suction nozzle 43. After confirming that the disk 17 can be reliably attracted by the atmospheric pressure detection sensor 83, the control device 77 drives the Z-axis drive cylinder 41 to raise the suction nozzle 43, aligns the disk 17, and takes out the ejection hole of the linear feeder 25. Take out from 75. At this time, when the atmospheric pressure detected by the atmospheric pressure detection sensor 83 does not reach a predetermined negative pressure, the controller 77 sends a stop signal of the device because of the adsorption failure.

Next, when the X-axis drive cylinder 35 is driven, the slide block 33 is moved onto the Petri dish 57, and the Z-axis drive cylinder 41 is driven again, so that the disk 17 held by the suction nozzle 43 is removed. Petri dish 57
It is placed on the agar plate medium 93 of. Then, the Z-axis drive cylinder 41 is driven to lower the suction nozzle 43,
The disk 17 is brought into contact with the agar plate medium 93.

In this state, by operating the vacuum pinch valve 53 again, the branch hose 47a open to the atmosphere is opened and the branch hose 47b connected to the vacuum pump 51 is closed, so that the suction nozzle 43 is opened. Atmospheric pressure is introduced into. As a result, the paper piece that has been suction-held is reliably separated from the suction nozzle by the impact of returning to the atmosphere. Therefore, the disc 17 from which the suction holding is released is transferred to a predetermined position on the agar plate medium 93.

Next, after the atmospheric pressure detection sensor 83 detects that the inside of the hose has reached the atmospheric pressure, that is, the transfer of the disk 17 is completed, the suction nozzle 43 is raised and the suction position of the disk 17 is again detected. It is returned to and becomes a standby state. The petri dish 57 to which the disc 17 has been transferred is
The disc transfer operation is completed by manually taking out the petri dish setting section 55 and closing the lid.

According to this paper piece automatic transfer device 91, the branch hose 47a opened to the atmosphere is closed, so that the inside of the hose becomes negative pressure, and the disk 17 is sucked and held by the air sucked from the suction nozzle 43. To be done. On the other hand, when the branch hose 47b is opened and the branch hose 47a is closed, atmospheric pressure is introduced into the hose, and the suction-held disc 17 is reliably separated from the suction nozzle 43 by the impact of the introduced atmosphere. .

The branch hoses 47a and 47b are selectively crushed by the vacuum pinch valve 53, so that the vacuum suction when the disk 17 is suction-held and the introduction of the atmosphere when the disk 17 is released is complicated and precise. It can be realized with a simple structure without the need for a simple valve structure.

Further, when the disk 17 is suction-held by the suction nozzle 43, the air passing through the disk 17 is sucked from the recess 87, and the suction from the side surface of the disk is reduced. As a result, the adjacent disk 17 is not adsorbed.

Further, since the vacuum in the hose when the disk 17 is suction-held is detected by the atmospheric pressure detection sensor 83, the pressure change in the hose when the suction nozzle 43 cannot adsorb the disk 17 can be detected. A holding error of the disk 17 due to the suction nozzle 43 can be detected.

[0044]

EXAMPLES Next, the results of an investigation of the working time of the disk method in the case of manual work and in the case of using the paper piece automatic transfer device according to the invention will be described. 1. In case of manual work (personnel: 2) [Working conditions] -Number of petri dishes: 100-Disk: 4 / petri dish-Number of repetitions: 3 [Survey results] Number of times Working time Average time required per dish 1. 16 minutes 28 seconds 2. 15 minutes 18 seconds About 9.5 seconds 3. 15 minutes 08 seconds

[0045] 2. In case of manual work (person: 1 person)   〔Process conditions〕   ・ Number of petri dishes: 100   ・ Disc: 4 sheets / dishes   ・ Number of repetitions: 3 times   〔Survey results〕   Number of times Working time Average time required per dish     1. 18 minutes 29 seconds     2. 17 minutes 13 seconds About 10.3 seconds     3. 15 minutes 45 seconds

[0046] 3. When using a paper piece automatic transfer device   〔Process conditions〕   ・ Number of petri dishes: 100   ・ Disc: 4 sheets / dishes   〔Survey results〕                                       Average time required per dish                                                 About 8 seconds

As is apparent from the above results, when the automatic paper piece transfer device according to the present invention is used, the dish 1
It has been found that the time can be shortened to 1.5 to 2.3 seconds per sheet.

[0048]

As described above in detail, in the paper piece transfer method according to the present invention, the other end of the hose is occluded to make the inside of the hose a negative pressure to be sucked from the suction nozzle. While holding the paper piece by suction with the atmosphere, when releasing the suction holding of the paper piece, close the branched one of the other ends of the hose and open the other branched one of the other end of the hose to open the inside of the hose. Since the atmospheric pressure is introduced to release the suction holding of the paper piece body by the suction nozzle, continuous suction can be performed from the suction nozzle to reliably hold the breathable paper piece body. Also, by introducing atmospheric pressure,
Since the suction-holding is released, the paper piece in the suction-holding state can be reliably transferred by the impact when the atmosphere is introduced.

Further, in the paper piece automatic transfer device according to the present invention, one end is communicated with the suction nozzle and the other end is branched into two directions, one of which is connected to the pump and the other of which is branched. Since it has a flexible hose that is open to the atmosphere and a pinch valve that closes one or the other of the other ends of the hose by selectively crushing the branched one or the other, it is complicated and precise. It is possible to obtain a highly reliable valve structure that does not cause clogging or the like with a simple structure without requiring a simple valve structure.

Further, there is provided a groove-shaped straight-advancing feeder for aligning and conveying the paper pieces sent from the input section, and a concave portion is formed along the alignment straight-advancing feeder at a substantially central portion of the bottom surface of the groove of the alignment straight-advancing feeder. Since it is formed, when the paper piece is sucked and held by the suction nozzle, the air passing through the paper piece can be sucked from the concave portion, and the misfeed that adsorbs the adjacent paper piece by the suction from the side surface of the paper piece can be prevented. You can

Further, since the atmospheric pressure detection sensor for detecting the vacuum in the hose during suction holding of the paper piece is provided, the pressure in the hose which changes when the suction nozzle cannot adsorb the paper piece is detected, It is possible to detect an error in holding the piece of paper by the suction nozzle. As a result, it is possible to prevent a transfer error of the piece of paper.

[Brief description of drawings]

FIG. 1 is a perspective view of a paper piece automatic transfer device according to the present invention as viewed from the side.

FIG. 2 is a side view of the paper piece automatic transfer device shown in FIG.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a view as seen from the direction of arrow AA in which a part of FIG. 2 is omitted.

FIG. 5 is a circuit diagram of an air pressure system that performs air pressure distribution, switching, and detection.

FIG. 6 is an enlarged view of a main part of a pinch valve.

FIG. 7 is a perspective view of an aligned straight feeder having a recess.

FIG. 8 is a conceptual diagram showing a process in which the collectively loaded discs are transferred to a petri dish.

FIG. 9 is a perspective view of a petri dish in which a disc is transferred to a predetermined position.

[Explanation of symbols]

15 Ball part (input part) 17 discs (piece of paper) 25 Straight line feeder 43 Suction nozzle 49 Hose (main hose) 51 vacuum pump 53 Vacuum pinch valve 83 Atmospheric pressure detection sensor 87 recess 91 Paper piece automatic transfer device 93 medium

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-50-115592 (JP, A) JP-A-49-63492 (JP, A) JP-A-51-81186 (JP, A) JP-A-51- 19588 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C12M 1/34 G01N 33/15 G01N 33/50 C12Q 1/68

Claims (5)

(57) [Claims] 1. One end of a flexible hose is connected to a suction nozzle for a piece of paper, the other end of this flexible hose is branched in two directions, one of the branches is connected to a pump, and the other is exposed to the atmosphere. Open, the hose on the side open to the atmosphere is closed, the inside of the hose is made negative pressure by the pump, and the paper piece is sucked and held by the suction nozzle from the paper piece supply unit. By closing the hose and opening the hose on the side open to the atmosphere, the suction holding of the paper piece by the suction nozzle is released by setting the inside of the hose to atmospheric pressure, and the paper piece is fed from the paper piece supply unit to the medium. A method for transferring a piece of paper, which is characterized in that it is transferred on top. 2. The paper piece transfer according to claim 1, wherein the atmospheric pressure in the hose is detected by an atmospheric pressure detection sensor when the paper piece is suction-held, and the suction is released when the atmospheric pressure is a predetermined value or more. How to put. 3. A paper piece automatic transfer device for taking out a predetermined number from a plurality of paper pieces in a paper piece supply unit and transferring each paper piece to a predetermined position on a medium, wherein the predetermined number of paper pieces is provided. A suction nozzle for adsorbing the body and transferring it onto the medium, a pump for generating the suction force of the piece of paper, and one end communicating with the suction nozzle and the other end bifurcated in two directions. One of which is connected to the pump and branched and the other of which is open to the atmosphere and which has flexibility, and a pinch valve which selectively sandwiches one of the branched two sides of the other end of the hose to close the hose, An automatic paper piece transfer device comprising: 4. The paper piece supply unit has an aligning linear feeder having at least one groove for aligning the paper pieces in a line in a groove and transporting the paper pieces to a suction position of the suction nozzle. 4. The automatic paper piece transfer device according to claim 3, wherein a recess along the aligned linear feeder is formed at a substantially central portion of the groove bottom surface of the linear feeder and at least near the suction position of the suction nozzle. 5. The automatic paper piece transfer device according to claim 3 or 4, further comprising an atmospheric pressure detection sensor for detecting an atmospheric pressure in the hose when the paper piece is suction-held.