JPH0885024A - Work transfer method and apparatus - Google Patents

Abstract

PURPOSE: To improve the production efficiency by enabling complete automation of a transfer process for a pin-like work, and jet through various nozzles, by connecting this process to a former process and, a next process to achieve automation of pin manufacture. CONSTITUTION: A sucking plate 8 is provided with a suction port 18 having air introducing small holes 18a formed corresponding to the hole 52 of a first tray 51 and the hole 62 of a second tray 61, respectively. When the suction port 18 of the sucking plate 8 is disposed opposite to the hole 52 of the first tray 51, the air in the suction port 18 is sucked through the small hole 18a to suck and hold a pin 50 in the suction port 18. When the suction port 18 of the sucking plate 8 is disposed opposite to the hole 62 of the second tray 61, air is supplied into the suction port 18 through the small hole 18a to discharge and transfer the pin 50 in the suction port 18 to the interior of the hole 62 of the second tray 61.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer method and device for transferring pin-shaped works between trays.

[0002]

2. Description of the Related Art Conventionally, as a method of moving a work between production processes, a transportation tray is used, and the work is set on the transportation tray and moved to the next process in units of the transportation tray. In this case, since the transportation tray is generally manufactured at a low cost, the dimensional accuracy is not sufficient. Therefore, when processing or inspecting in the next process, it is used after being transferred to a dedicated tray with guaranteed dimensional accuracy.

FIG. 12 is a sectional view showing a state in which a pin-shaped work (hereinafter referred to as "pin") is set on the transportation tray, and FIG. 13 is a pin-shaped work on the processing tray. It is sectional drawing which has shown the state set. That is, in the transportation tray 51 shown in FIG. 12, the inner diameter D1 of the hole 52 in which the pin 50 is set is formed sufficiently larger than the diameter d1 of the pin 50 to facilitate setting of the pin 50. Pin 5 set in hole 52
0 is each inclined, and the pitch between the pins 50 is also P1 and P2, which are mixed. On the other hand, in the processing tray 61 shown in FIG. 13, the inner diameter D2 of the hole 62 into which the pin 50 is inserted is D2.
And the hole pitch P3 are controlled, and the clearance between the diameter d1 and the inner diameter D2 is small, and the pin 50 set in the hole 62 is set at a predetermined position on the processing tray 61 without tilting. . The pin 50 here has a structure in which the head 50b is bulged at the upper end of the pin body 50a, and the upper surface of the head 50b is formed in a hemispherical shape.

Conventionally, when performing such transfer,
It may be carried out manually by using tweezers or the like, but since the transport tray 51 may contain several thousand pins 50, the transport tray 5 containing several thousand pins 50 may be used.
It takes a lot of time and patience to transfer from 1 to the processing tray 61.

Therefore, as a conventional transfer method, the pin diameter d is set at the position of the hole 62 in the processing tray 61.
Prepare a transfer jig with a hole slightly larger than 1
Align this transfer jig with the transport tray 51, turn it upside down, transfer the pins to the transfer jig, then move the processing tray 61 to the transfer tray, and turn both trays upside down. There is a way.

[0006]

However, according to this method, since the pin position changes in the transfer tray, the pin position changes in the processing tray 61, so that the pin 50 is surely held in the processing tray 61. There is no guarantee to enter. Therefore, the operator shakes the transfer jig or gives vibration to lift it while watching the situation. But,
When the pin is small and the clearance with the processing tray 61 is small, the work is difficult and time consuming unless the operator is well trained.

Therefore, it is difficult to automate using the transfer tray method as it is, from the viewpoint of reliability of insertion, and the pins 50 that could not be inserted scatter around the apparatus, which causes the operation of the apparatus. Also hinders.
As a result, when automation is performed, a method of transferring pins one by one using image processing is used. However, when the number of pins is large, it takes a long time and the next process (for example, assembling process,
This has been a factor that deteriorates the work efficiency of the inspection process) and the function of the assembly inspection machine.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to completely automate the transfer process of a pin-shaped work, and connect this process with the preceding and following processes. The aim is to automatically manufacture pins and dramatically improve production efficiency. Furthermore, other purposes will be clarified one after another in the content described below.

[0009]

The object of the present invention is to achieve the object of the present invention.
The pin-shaped workpiece accommodated in the positioning portion of the first tray corresponds to the positioning portion of the first tray
In the work transfer device for transferring to the tray-side positioning part, a work suction port having an air introduction hole is provided corresponding to each of the first positioning part and the second tray positioning part. A plate, a vacuum pressurizing chamber communicating with the work suction port through the air introduction hole of the suction plate, and an elevating means for moving the suction plate in the vertical direction, When the positioning part and the suction holes of the suction plate are arranged corresponding to each other, the vacuum pressurizing chamber is made to have a negative pressure to suck the work into the work suction port, and the positioning part of the second tray and the suction plate. When the suction holes are correspondingly arranged, the vacuum pressurizing chamber is pressurized to discharge the work in the work suction port into the positioning portion of the second tray and transfer the work. It is achieved Te.

Further, for this purpose, in the present invention, the pin-shaped work accommodated in the positioning portion of the first tray is positioned on the second tray side corresponding to the positioning portion of the first tray. In a work transfer method for transferring to another part, a suction plate provided with a work suction port having air introduction holes formed respectively corresponding to the positioning part of the first tray and the positioning part of the second tray. When the work suction port of the suction plate is arranged corresponding to the positioning portion of the first tray, the air in the work suction port is sucked through the air introduction hole and the work is sucked into the work suction port. Is sucked and held, and air is supplied into the work suction port through the air introduction hole when the work suction port of the suction plate is arranged corresponding to the positioning portion of the second tray. It is achieved by the work of the workpiece suction mouth as transferring and discharging the positioning portion of the second tray.

[0011]

According to this, when the work suction port of the suction plate is arranged corresponding to the positioning portion of the first tray, the air in the work suction port is sucked through the air introduction hole, and this suction force causes the work suction port to enter the work suction port. Work can be adsorbed and held. Next, the work suction port that holds the work by suction is arranged corresponding to the positioning portion of the second tray,
At this point, the positioning of the first tray and the second tray is performed. Further, when air is supplied into the work suction port through the air introduction hole to pressurize the work while this positioning is performed, the vacuum suction by the suction plate is broken, and the work suctioned and held in the work suction port is moved to the second position. It can be discharged and transferred into the positioning part of the tray. As described above, the work transfer can be performed by a simple operation, so that the work transfer can be automated.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 shows an embodiment of the work transfer apparatus according to the present invention. In this embodiment, the pin 50 set in the hole 52 on the transportation tray 51 shown in FIG. 12 is machined as shown in FIG. The case of transferring to the hole 62 on the tray 61 will be described as an example. Therefore, FIG.
Members corresponding to those in FIGS. 2 and 13 are designated by the same reference numerals as those in FIGS.

In the work transfer device 1,
The transport means 2 is composed of the transport means 2, the pin transport conveyor 3 and the pin processing conveyor 4 which are arranged at different positions with the transport means 2 interposed therebetween, the suction inspection section 5, and the like. A transport tray positioning unit 6 is defined on the pin transport conveyor 3, and a pin processing tray positioning unit 7 is configured on the pin processing conveyor 4.

More specifically, the conveying means 2 has a suction plate 8 which will be described later, and the suction plate 8 is used for positioning the transport tray positioning portion 6 of the pin transport conveyor 3 and the pin processing tray positioning of the pin processing conveyor 4. The suction plate 8 is moved up and down alternately on the part 7 and has a lifting means (not shown). The lifting means moves the suction plate 8 in the vertical (up-down) direction on the positioning parts 6, 7. .

Each of the holes 5 is provided at one end of the pin transporting conveyor 3.
A stacker 10 for stacking and stocking transport trays 51 in which pins 50 are set on 2 is provided. Then, on the pin transport conveyor 3, the transport trays 51 stacked on the stacker 10 can be taken out one by one, and the transport trays 51 can be transported through the transport tray positioning section 6 to a tray discharge position (not shown). It is structured. Further, at a position corresponding to the transportation tray positioning unit 6, a positioning mechanism 11 for temporarily stopping and positioning the transportation tray 51 transported to the transportation tray positioning unit 6 is provided.

The pin processing conveyor 4 has a structure capable of transporting an empty processing tray 61 through the pin processing tray positioning portion 7 to a processing position (not shown) for the next step.
Further, at a position corresponding to the pin processing tray positioning unit 7, a positioning mechanism 12 for temporarily stopping and positioning the processing tray 61 conveyed to the pin processing tray positioning unit 7 is provided. There is.

FIG. 1 is an enlarged cross-sectional view showing the structure of the main part of the work transfer device 1, and mainly shows the main part of the suction plate 8 in an enlarged manner. In FIG. 1, the suction plate 8 includes a suction plate body 13, a vacuum pressurizing chamber 14, an elastic member 15, and a pressing plate 16. Of these, the suction plate body 13 is formed in a plate shape, and a plurality of suction ports 18 are provided corresponding to each hole 52 of the transport tray 51 and each hole 62 of the processing tray 61. The suction port 18 penetrates in the vertical direction, and the small hole portion 1 is provided from the upper surface side (vacuum pressure chamber side).
8a, a medium hole portion 18b, and a large hole portion 18c are formed in this order, and a taper surface (mortar-shaped surface) 18d is formed between the small hole portion 18a and the medium hole portion 18b.
A tapered surface (mortar-shaped surface) 18e is formed between the middle hole portion 18b and the large hole portion 18c. Here, the inner diameter D3 (see FIG. 1) of the small hole portion 18a is the head portion 5 of the pin 50.
Smaller than the outer diameter d2 of 0b (D3 <d2), the inner hole portion 1
The inner diameter D4 of 8b (see FIG. 1) is substantially equal to or slightly larger than the outer diameter d2 of the head 50b of the pin 50 (D4 ≧ d
2), the large hole portion 18c is formed sufficiently larger than the outer diameter d2 of the head portion 50b (D5> d2).

The vacuum pressurizing chamber 14 is formed over substantially the entire upper side of the suction plate body 13 by a cover 19 which is disposed in contact with and covers the upper side of the suction plate body 13. Each suction port 18 of the suction plate body 13 communicates with the suction port 14. Further, a joint 20 is attached to a part of the cover 19, and the inside of the vacuum pressurizing chamber 14 and a vacuum source and a pressure source (not shown) are connected via the joint 20.

The elastic member 15 is made of rubber and formed into a flexible sheet, and the suction port 18 of the suction plate body 13 is formed.
Retaining holes 21 are formed at positions corresponding to.
The holding hole 21 is smaller than the suction port 18 of the suction plate body 13, and the inside of the holding hole 21 is, as shown in FIG.
Slits 23 that are radially cut away from the center are provided to form a plurality of tongue pieces 24. The holding hole 21 allows the pin 50 to be inserted, and after insertion, the tongue piece 24 presses the peripheral surface of the pin body 50a to prevent the pin 50 from easily slipping out of the holding hole 21. It has become.

The pressing plate 16 is formed in a sheet shape corresponding to the elastic member 15, and a through hole 25 having substantially the same size as the suction port 18 is formed at a position corresponding to the holding hole 21 of the elastic member 15. Has been done. And this holding plate 16
The holding member 21 is made to correspond to the through hole 25, and the elastic member 1
5 are adhered and integrated in a state of being in close contact. The pressing plate 16 integrated with the elastic member 15 in this manner
Causes the elastic member 15 to contact the lower surface of the suction plate body 13,
After this, the structure is such that it is fastened to the suction plate body 13 with the screw 26.

FIG. 4 is a transfer operation diagram on the transport tray side, and FIG. 5 is a transfer operation diagram on the processing tray side. Therefore, the operation of the work transfer apparatus shown in FIGS. 1 to 3 together with FIGS. 4 and 5 will be described below. First,
The transport trays 51 in which the pins 50 are set in the respective holes 52 are taken out one by one from the stacker 10 by the pin transport conveyor 3 and transported to the transport tray positioning section 6 and positioned and fixed by the positioning mechanism 11. To be done.

Next, the suction plate 8 which has been moved to a position above the transportation tray positioning portion 6 by the transport means 2 and is on standby starts to descend vertically (see FIGS. 1 and 4 (a)). At this time, the state of the pin 50 accommodated in the hole 52 of the transport tray 51 is as shown in FIGS. 1 and 4 (a).
Due to the clearance that exists between the pin and the pin 50,
The direction is not fixed. However, when the suction plate 8 descends to a predetermined position and the pin 50 is pressed against the elastic member 15 through the through hole 25 of the pressing plate 16 (see FIG. 4B), the pin 50 is held in the holding hole. Attempt to enter the inside of 21, and it is brought close to the center. In this state, the suction preparation is completed.

Next, a vacuum source (not shown) is activated and the joint 20
The air in the vacuum pressurizing chamber 14 is evacuated through this, and when the inside of the vacuum pressurizing chamber 14 and the suction port 18 becomes negative pressure, the elastic member 15 and the pin 50 are pulled upward (FIG. 4).
(C)). Also, if continuous suction is performed as it is,
The pin 50 slips through the holding hole 21 of the elastic member 15 and is pulled up to a state in which the head portion 50b of the pin 50 is brought into contact with the tapered surface 18d and positioned (see FIG. 4D). At this time, the head 50b of the pin 50 is brought into contact with the tapered surface 18d and positioned at the center of the suction port 18, and the lower portion of the pin 50 is pressed substantially evenly by the tongue piece 24 of the elastic member 15 being pressed against the periphery. . For this reason, it is held in the center of the suction port 18. In this way, it becomes possible to position the pin 50 on the suction plate 8, which is the transportation tray 51.
This is carried out at the same time for all the pins 50 set on the top, whereby the transfer from the transport tray 51 to the suction plate 8 is completed. Further, in this state, even if the vacuum by the vacuum source is cut off, the pin 50 can be kept in that state by the elastic member 15.

Then, with the vacuum source activated,
The suction plate 8 is lifted by the conveying means 2 and is further conveyed to above the suction inspection section 5, and the suction state of the pin 50 is checked by the suction inspection section 5. In addition, after the check by the suction inspection section 5, it is conveyed to above the pin processing tray positioning section 7 and then to the hole 62 of the processing tray 61 which is conveyed to the pin processing tray positioning section 7 by the pin processing conveyor 4. The suction ports 18 coincide. This state is shown in Figure 5 (a).
Is.

Next, the operation of the vacuum source is cut off, the pressurizing source (not shown) is operated instead, and the vacuum pressurizing chamber 14 is switched to the pressurized state. Then, the inside of the suction port 18 is also pressurized, whereby the pin 50 is pushed out against the holding force of the elastic member 15, and the tongue piece 24 of the elastic member 15 is moved downward while turning downward. . At this time, even if some pitch error occurs, the pin 50 is inserted along the chamfering taper 62a formed at the entrance of the hole 62 of the processing tray 61. This state is shown in FIGS. 5B to 5D, and the insertion is completed in the state of FIG. 5E. In this way, all of the pins 50 held by the suction plate 8 are transferred to the processing tray 61 at once. Then, the suction plate 8
Is lifted by the transporting means 2 and stands by at the initial position.
On the other hand, the processing tray 61 on which the pin 50 is set is released from the positioning lock by the positioning mechanism 12, and is conveyed to the next processing inspection step or the like. This completes one cycle, and the same transfer process is repeated thereafter.

All of these transfers are automatically performed, but the applicant of the present invention, for example, has an outer diameter of 0.
As a result of actually using 5 mm and 7 mm long pins 50, even if 4,000 pins 50 are set per tray, all pins 50 can be transferred by about 15 It was completed in seconds, and the pin transfer process could be achieved without using any human hands.

Therefore, according to the work transfer device of the present embodiment, the suction port 18 of the suction plate 8 has the transport tray 51.
When the air in the suction port 18 is sucked through the small hole (air introduction hole) 18a after being arranged corresponding to the hole (positioning portion) 52 of the pin (workpiece) 5 in the suction port 18 by this suction force.
When the suction port 18 capable of adsorbing and holding 0 and adsorbing and holding the pin 50 is arranged corresponding to the hole (positioning portion) 62 of the pin processing tray 61, the suction port 18 is inserted into the suction port 18 through the small hole 18a. When air is supplied and pressurized, the pin 50 sucked and held in the suction port 18 can be discharged and transferred into the hole 62 of the pin processing tray 61, so that the transfer process of the pin 50 is fully automated. It becomes possible to do. Further, by associating this process with the preceding and following processes, the pin 50 can be automatically manufactured, and a dramatic improvement in production efficiency can be expected.

Further, since a large number of pins 50 can be simultaneously adsorbed, inserted and transferred with a simple structure, it is possible to transfer the pins 50 with high efficiency.

Further, the pin 50 is centered so as not to be damaged during suction, and when inserted into the processing tray 61, the pitch between the suction port 18 on the suction plate 8 side and the hole 62 on the processing tray 61 side. Even if there is some difference between the two, the pin 50 can be inserted without damaging it.

Further, even if the vacuum source is cut off while the pins 50 are being transferred, the sucked pins 50 can be held without dropping.
The effect that the production efficiency of the device can be improved can be obtained.

In the above embodiment, the holding hole 21 formed in the elastic member 15 is provided with slits 23 that are radially cut out from the center toward the outside, and four tongue pieces 24 are formed. Although it has a structure, this holding hole 21
The shape may be any other shape, and FIGS. 6 to 8 show one example thereof. That is, in FIG. 6, the central holding hole 21 is made relatively large, and further three tongue pieces 24 are provided by the slit 23.
Further, FIG. 7 shows a star-shaped holding hole 21 provided,
In FIG. 8, a circular holding hole 21 having a small inner diameter is provided, and other than this, a polygonal holding hole may be used.

The pin 50 is composed of the pin body 50a and the head portion 50b, and the head portion 50b bulged at the upper end of the pin body 50a has a hemispherical upper surface. , A pin having a shape other than this, for example, one in which the upper surface of the head 50b is not formed in a hemispherical shape as shown in FIG. 9, or the head 50 is not provided as shown in FIG. There is no problem even if the structure is not provided.

FIG. 11 shows the holding hole 2 in the elastic member 15.
2 is a main-part configuration layout diagram showing an example of a processing device for forming 1. FIG. In FIG. 11, this processing device is composed of a laser device 31, an XY table 32, a jig 33 arranged on the XY table 32, a controller 34, and the like. The elastic member 15 can be positioned and fixed through the structure. Also, the laser device 3
1 irradiates a CO ₂ laser or a YAG laser. In this processing device, the controller 34 controls the operation of the XY table 32 and the power control of the laser device 31, respectively.

Next, by using this processing apparatus, the elastic member 15
In the case of processing, the elastic member 15 is first brought into close contact with and bonded to the pressing plate 16. In this case, in this embodiment, the elastic member 15 is made of a rubber-like material that is expandable and contractible. However, in the case of a material such as a fluorine-based material that does not have good adhesiveness, after surface treatment with a solvent or the like , Apply a predetermined pressure to bond. After that, after positioning and fixing to the jig 33 on the XY table 32 with the positioning pin 35 and performing the origin search,
Start processing. This machining is executed according to a preset program, and the machining of the shape according to the program is automatically performed.

[0035]

As described above, according to the present invention,
When the work suction port of the suction plate is arranged corresponding to the positioning portion of the first tray, the air in the work suction port is sucked through the air introduction hole, and the suction force holds the work in the work suction port. When the workpiece suction port that holds the workpiece by suction is arranged in correspondence with the positioning portion of the second tray, air is supplied into the workpiece suction port through the air introduction hole to pressurize the workpiece suction port. Since the held work can be discharged into the positioning portion of the second tray and transferred, the work transfer process can be fully automated.
Further, by associating this process with the preceding and succeeding processes, it is possible to achieve automatic manufacturing of the work, and it is expected that the production efficiency will be dramatically improved. Further, since a large number of works can be sucked at the same time with a simple structure, and can be inserted and transferred, it is possible to transfer pins with high efficiency.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing a main structure of a work transfer device according to the present invention.

FIG. 2 is an external perspective view of a work transfer device according to the present invention.

FIG. 3 is an enlarged view of a main part of the work transfer device according to the present invention.

FIG. 4 is an explanatory diagram of a transfer operation on the transport tray side.

FIG. 5 is an explanatory diagram of a transfer operation on the processing tray side.

FIG. 6 is a view showing a modified example of holding holes formed in an elastic member.

FIG. 7 is a diagram showing another modification of the holding hole formed in the elastic member.

FIG. 8 is a view showing still another modified example of the holding hole formed in the elastic member.

FIG. 9 is a diagram showing a modification of the pin.

FIG. 10 is a diagram showing another modification of the pin.

FIG. 11 is a main-part configuration layout diagram showing an example of a processing device for forming a holding hole of an elastic member.

FIG. 12 is a cross-sectional view of the transportation tray shown with pins set therein.

FIG. 13 is a cross-sectional view of the processing tray shown with pins set therein.

[Explanation of symbols]

 1 Work transfer device 2 Conveying means 6 Transport tray positioning part 7 Pin processing tray positioning part 8 Suction plate 14 Vacuum pressurizing chamber 18 Suction port (workpiece suction port) 18a Small hole part (Air introduction hole) 21 Holding hole 50 pins (Work) 51 Pin transport tray (first tray) 52 Hole (positioning part) 61 Processing tray (second tray) 62 Hole (positioning part)

Claims (8)

[Claims] 1. A work transfer for transferring a pin-shaped work accommodated in the positioning part of the first tray to a positioning part on the second tray side corresponding to the positioning part of the first tray. In the replacement device, a suction plate provided with a work suction port having an air introduction hole corresponding to each of the first positioning portion and the positioning portion of the second tray, and the suction plate through the air introduction hole. A vacuum pressurizing chamber that communicates with the work suction port, and an elevating means for moving the suction plate in the vertical direction are provided, and the positioning portion of the first tray and the suction hole of the suction plate are arranged correspondingly. When the vacuum pressurizing chamber is made negative, the work is sucked into the work suction port,
When the positioning portion of the tray and the suction hole of the suction plate are arranged in correspondence with each other, the vacuum pressurizing chamber is pressurized to discharge and transfer the work in the work suction port into the positioning portion of the second tray. Work transfer device characterized by changing. 2. A pin-shaped workpiece housed in a positioning hole of the first transportation tray is positioned in a positioning hole of the second transportation tray corresponding to the positioning hole of the first transportation tray. In a work transfer device for transferring, a work transfer device is provided corresponding to each of the positioning holes of the first transportation tray and the positioning holes of the second transportation tray, and has an air introduction hole in the center. , A suction plate with a work suction port whose back wall is inclined like a mortar toward the air introduction hole, and an elastic sheet material, and the outer diameter of the work approximately in the center Has a holding hole formed with an inner diameter smaller than that of the holding hole, the work can be press-fitted and held in the holding hole, and the flexible elastic member is attached to cover the work suction port of the suction plate. A member, A vacuum pressurizing chamber communicating with the work suction port through the air introduction hole of the attachment plate, an elevating means for moving the suction plate in the vertical direction, and the suction plate by the first transport tray. Means for moving to a position where the second transport tray is transported and a position where the second transport tray is transported, the positioning hole of the first transport tray and the suction hole of the suction plate correspond to each other. When placed, the suction plate is lowered to place the work in the work suction port through the holding hole, and the air in the work suction port is sucked through the air introduction hole to suck the air in the work suction port. Is sucked and held, and air is ejected into the work suction port through the air introduction hole when the work suction port of the suction plate is arranged corresponding to the positioning portion of the second transport tray. Work sorter, characterized in that transferring and discharging the workpiece of the workpiece suction mouth positioning portion of the second transportation tray against the holding force of the holding hole Te. 3. The work transfer device according to claim 2, wherein the holding hole is formed by a plurality of slits extending radially from the center. 4. The work transfer device according to claim 2, wherein the holding hole is formed by a circular hole having an inner diameter smaller than an outer diameter of the work. 5. The work transfer device according to claim 3, wherein the holding hole is formed by laser processing. 6. A work transfer for transferring a pin-shaped work accommodated in the positioning part of the first tray to a positioning part on the second tray side corresponding to the positioning part of the first tray. In the replacement method, a suction plate provided with a work suction port having air introduction holes formed respectively corresponding to the positioning portion of the first tray and the positioning portion of the second tray is prepared, and the suction plate When the work suction port is arranged corresponding to the positioning portion of the first tray, the air in the work suction port is sucked through the air introduction hole to suck and hold the work in the work suction port, and the suction plate. When the work suction port of the second tray is arranged corresponding to the positioning portion of the second tray, air is supplied into the work suction port through the air introduction hole so that the work suction port inside the work suction port is closed. Wherein the chromatography click second
The work transfer method is characterized in that the work is discharged into the positioning portion of the tray and transferred. 7. The work transfer method according to claim 6, wherein the back wall of the work suction port is inclined toward the air introduction hole in a mortar shape. 8. A work transfer for transferring a pin-shaped work accommodated in the positioning part of the first tray to a positioning part on the second tray side corresponding to the positioning part of the first tray. In the replacement method, the work is press-fitted and held in a substantially central portion by covering a work suction port having an air introduction hole formed corresponding to each of the positioning portion of the first tray and the positioning portion of the second tray. A vertically movable suction plate to which a flexible member having a holding hole is attached, and the work suction port of the suction plate is arranged corresponding to the positioning portion of the first tray. Occasionally, the suction plate is lowered to arrange the work through the holding hole in the work suction port, and the air in the work suction port is sucked through the air introduction hole to suck the air in the work suction port. When the work is sucked and held, and when the work suction port of the suction plate is arranged corresponding to the positioning portion of the second tray, air is jetted into the work suction port through the air introduction hole so that the work suction port is opened. The work transfer method is characterized in that the work is discharged into the positioning portion of the second tray and transferred against the holding force of the holding hole.