JPH0321084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drying apparatus for cylindrical electronic components such as fixed film resistors, diodes, and capacitors.

BACKGROUND ART Recently, so-called leadless cylindrical fixed film resistors, diodes, capacitors, etc. have been used. For example, in the case of a fixed film resistor, in the manufacturing process, as shown in FIG. 14a, a resistive element R1 is fitted with caps R2, which are magnetic parts, on both sides of an insulator R1, as shown in FIG. 14B. A coating film r3 is formed and dried. Next, as shown in FIG. 14c, a plurality of color codes r4 are applied to the outer periphery of the coating film r3 and dried. Furthermore, the resistor R can be manufactured by marking (imprinting) or the like and drying.

Conventionally, in order to convey the resistor element R1 in this manufacturing process, a flexible metal endless conveyor belt 10 is used as shown in FIGS. 15 to 17.
Insertion holes 102 for resistor elements R1 are arranged in rows in the cap R1, and the resistor element R1 is placed in the insertion hole 102 of the conveyor belt 101 at the lower part of the transport side of the conveyor belt 101. A rail 103 is provided to guide the movement of the end portion, and the conveyor belt 101
It is designed to run by a reversing drive device.

The drive device causes the conveyor belt 101 to run, and as the conveyor belt 101 runs, the resistance element R1 inserted into the insertion hole 102 is conveyed while being rolled on the support part 104 of the guide rail 103. It's getting old.

While the resistor element R1 is being transported as described above, the cap r2 of the resistor element R1 is forcibly rotated by a rubber rotation wheel 105 or the like as shown by the chain line in FIG. 106
and a color disc (not shown) to sequentially apply paint and color paint to the outer periphery of the insulator r1 and the coating film r3,
It is designed to dry following application.

Problems to be Solved by the Invention However, in the conventional configuration as described above, the guide rail 103 has a cap r
Since the outer ends of the conveyor belt 101 and the guide rail 103 are supported, high processing accuracy is required for the conveyor belt 101 and the guide rail 103, which increases the cost. Of course, if this machining accuracy is poor, or if a misalignment occurs between the conveyor belt 101 and the guide rail 103 due to distortion due to heat, there is a risk that the resistor element R1 may fall. If the resistor element R1 falls during the painting, color coding process and drying process,
Paint or color paint adheres to the guide rail 103, and this paint or color paint is
Attached to both ends of the resistor element R1 that is sequentially transported,
All the products are defective, which is uneconomical. In addition, in the painting process, color code process, etc., the resistor element R1
The cap R2 is forcibly rotated by the rotating wheel 105 or the like, but in this case as well, painting or color coding cannot be performed unless the rotating wheel 105 or the like is brought into accurate contact only with the cap R2. For this reason, the conveyance state must be constantly monitored, which has been an obstacle to labor saving. In particular, the total length of resistor element R1 is 2 mm, and the length of cap r2 is
For small resistors of about 0.60 mm, the cap r2 is supported and transported on the support part 104 of the guide rail 103, and the cap r2 is supported on the rotating wheel 10 during painting or color coding processes.
It was extremely difficult to rotate it using 5th grade. In addition, since the resistor element R1 is simply placed on the support part 104 of the guide rail 103 as described above, it must be transported linearly on a horizontal plane. The floor space of
It cannot be used if the floor space is small.

Therefore, the present invention provides a method for smoothly and easily handling even if the cylindrical electronic component of the so-called lead race described above is small in size.
Moreover, it can be transported reliably and rotated smoothly and reliably, thus preventing the cylindrical electronic components from falling, saving labor, and reducing the floor space occupied by the drying oven. The present invention aims to provide a drying device for cylindrical electronic components that can be made smaller.

Means for Solving the Problems The technical means of the present invention for solving the above problems is that insertion holes into which cylindrical electronic components can be inserted horizontally are arranged in a row, and each insertion hole has a A chucking device capable of gripping both ends of a cylindrical electronic component from the axial direction of the cylindrical electronic component is rotatably supported, and connects the conveying pallet in an endless manner to a large number of conveying pallets configured in an endless manner, A reversing drive device that runs inside and outside the drying oven and runs in a zigzag pattern within the drying oven, a guide member that guides the traveling of the conveying pallet, and an insertion hole for the conveying pallet outside the drying oven. The device is equipped with opening/closing means for opening and closing the chucking device at the supply position and the discharge position of the cylindrical electronic component.

Effect The effects of the above technical means are as follows.

The conveying pallet is driven by a drive device, and while the conveying pallet is traveling, a cylindrical electronic component is inserted into the insertion hole corresponding to the chucking device, which is opened by the opening/closing means, and after insertion, the chucking device is closed by the opening/closing means. It is possible to grip both ends of a cylindrical electronic component and transport it. Thus, the cylindrical electronic component coated with paint, color codes, etc. can be transported in a zigzag pattern within a drying oven and dried during this period. Further, the cylindrical electronic component being transported can be rotated by bringing the chucking device that grips the cylindrical electronic component into contact with the rotating means.

Examples Hereinafter, an example in which the drying apparatus of the present invention is used to dry a fixed film resistor (hereinafter simply referred to as a resistor) will be described with reference to the drawings.

First, a first example will be explained.

As shown in Figures 1 and 2, the conveyor pallet 1
is composed of a substrate 2, covers 3, 4, etc.
The substrate 2 is made of stainless steel, aluminum, or the like, and has insertion holes 5 for resistive elements R1 (or resistors R) arranged in a row at equal intervals in the longitudinal center. The middle part of each insertion hole 5 is formed in an arc shape and wide,
It is designed to prevent adhesion of paint, etc., which will be described later. A recessed groove 6 communicating with each insertion hole 5 is formed in the longitudinal direction of the center of the lower side of the substrate 2, that is, in the direction in which the insertion holes 5 are lined up, and a recessed groove 6 that communicates with each insertion hole 5 is formed in the upper side of the substrate 2 in the width direction, that is, the insertion hole 5. A recessed groove 7 communicating with each insertion hole 5 is formed in a direction perpendicular to the direction in which the insertion holes 5 are arranged. A through hole 8 is formed in the substrate 2 on both sides of the insertion hole 5 in the longitudinal direction of the substrate 2, that is, in the direction in which the insertion holes 5 are arranged, and communicates with the through hole 8 on the lower side of the end wall 9 on both short sides. A recessed groove 10 is formed. Cover 3, 4
is made of stainless steel, aluminum, etc.
The cover 3 is formed in the shape of a strip, and the cover 4 is formed in the shape of an angle. The cover 3 is attached to the substrate 2 with screws 11 so as to close the upper part of the recessed groove 7 between the insertion hole 5 and the through hole 8, and the cover 4 is attached to the upper part of the recessed groove 7 on the outside of the through hole 8. It is attached to the substrate 2 with screws 12 so as to close the sides.

A chucking device 13 is provided in each recessed groove 7 of the conveying pallet 1. To explain the details of this chucking device 13, the first and second chuck members 14 and 15 are formed in the same shape,
A conically recessed chuck portion 16 is formed at the tip of the round rod-like member, and a large diameter portion 17 is formed at the middle portion. The first chuck member 14 is inserted into the recessed groove 7 on one side of the insertion hole 5, and the large diameter portion 17
is located in the through hole 8 and is prevented from coming off by the covers 3 and 4. Movement of the large diameter portion 17 of the first chuck member 14 in the width direction of the substrate 2 is restricted by the hole wall of the through hole 8, so that the first chuck member 14 is rotatably supported in a fixed position. A steel ball 18 is interposed between the base end of the first chuck member 14 and the cover 4.
is designed to rotate smoothly. The second chuck member 15 is inserted into the recessed groove 7 on the other side of the insertion hole 5, and the large diameter portion 17 is located within the through hole 8, and is prevented from coming out by the covers 3 and 4.
The large diameter portion 17 is inserted into the hole wall of the through hole 8 with a margin, so that the second chuck member 15 is supported so as to be movable in the axial direction and rotatable. A steel ball 18 and a compression spring 19 are interposed between the base end of the second chuck member 15 and the cover 4, and the elasticity of the compression spring 19 causes the second chuck member 15 to
is urged toward the first chuck member 14, and the steel ball 1
8 for smooth rotation. This chucking device 13 is installed on the board 2 side with the covers 3 and 4 removed, and then
It can be easily assembled by attaching it to the board 2. A connecting member 20 is attached to the middle part of the cover 4 of each conveying pallet 1, and using the connecting hole 21, a pair of endless chains 22 are removed at predetermined intervals as shown in FIG. are possibly and rotatably connected. That is, chain 2
Attachments 2 to links 23 at predetermined intervals of 2.
4 is attached and connected by a connecting member 25 using a connecting hole 21 of the connecting member 20 and a connecting hole (not shown) of the attachment 24. In this way, a large number of conveying pallets 1 are connected endlessly by the chain 22.

Transport pallet 1 and chain 22 connecting it
As shown in FIGS. 3 to 5, each set of wheels 29a to 29b and a pair of sprockets 30a to 30b supported by a frame 28 are hung so as to be reversible. This conveying pallet 1 has a supply device 32, an undercoating device 33,
First drying oven 34, top coating device 35, second drying oven 36, color code device 37, third drying oven 3
8. In the first drying oven 34, the conveying pallet 1 and the chain 22 guided inside from the lower inlet 40 are attached to each set of wheels 41a to 41b and a pair of sprockets 42a, which are pivotally supported in a staggered arrangement inside the drying oven 34. to 42
b is applied in a zigzag manner in a horizontal direction from the bottom to the top, and the upper outlet 44 of the drying oven 34
Conveying pallet 1 and chain 2 guided further outward
2 are guided downward by each set of wheels 44a, 44b and a pair of sprockets 45a, 45b. Similarly, in the second drying oven 36, the lower inlet 4
The conveyor pallets 1 and chains 22 guided inside from the drying oven 36 are sequentially horizontally moved from the bottom to the top by each set of wheels 49a to 49f and a pair of sprockets 50a to 50f, which are pivotally supported in a staggered arrangement in the drying oven 36. The conveying pallets 1 and the chain 22 are hung in a zigzag manner in the direction of the drying oven 36 and are guided outward from the upper outlet 52 of the drying oven 36.
a, 53b and a pair of sprockets 54a, 54
It is guided downward by b. Third drying oven 38
Similarly, the conveying pallet 1 and chain 22 guided inside from the lower inlet 57 are supported by each set of wheels 58a to 56b and a pair of sprockets 59a to 59b, which are pivotally supported in a staggered arrangement in the drying oven 38.
The conveying pallets 1 and the chain 22 are sequentially hung horizontally in a zigzag pattern from the bottom to the top, and are guided outward from the upper outlet 61 of the drying oven 38.
are guided downward by each set of wheels 62a, 62b and a pair of sprockets 63a, 63b. First, second and third drying ovens 34, 36 and 38
A heating means (not shown) such as a heater is provided inside. The shaft of the sprocket 30b is the mount 28
The motor 6 is connected to the motor 65 attached to the
5 rotates the sprocket 30b,
The chain 22 and the conveying pallet 1 can be moved in the direction of the arrow.

As is clear from FIGS. 6 to 9, the frame 28
A metal guide rail 67 is provided above on the lower side of the transport side of the transport pallet 1 and chain 22. The guide rail 67 is formed by connecting units of a desired length, and is attached to the pedestal 28 so as to allow each unit to expand and contract due to heat during the drying process. That is, as is clear from FIG.
An engaging member 68 is attached onto the guide rail 8 by bolts 69, and a notched groove 70 formed on the side surface of the guide rail 67 is engaged with the engaging member 68. The guide rail 67 has grooves 71 for running the chain on both sides, and a groove 72 for running the conveying pallet in the center.
A deeper groove 73 is formed in the center of this groove 72 for escape. The chain 22 is inserted into the groove 71, and the lower portions of both sides of the conveying pallet 1 are inserted into the groove 72 so as to be movable.
Also, the guide rail 67 is provided with a first coating from the undercoating device 33.
The means for rotating the first and second chuck members 14 and 15 extends over the entire length of the drying oven 34 to the end of the lower horizontal part and the entire length from the top coating device 35 to the end of the lower horizontal part of the second drying oven 36. As shown by the chain lines in FIGS. 2 and 6, the first and second chuck members 1
A guide portion 67a that contacts the large diameter portions 17 of 4 and 15 is provided.

The feeding device 32 provided at the starting end of the conveying pallet 1 on the conveying side will be explained as shown in FIGS. 6 and 7.
As is clear from the figure, a supply wheel 74 made of a non-magnetic material is fixed on a horizontal rotating shaft 75 above the conveying pallet 1, and this rotating shaft 75 is connected to a drive device (not shown) to rotate intermittently. Ru.
On the outer periphery of the supply wheel 74, a large number of storage grooves 76 for storing the resistor elements R1 are formed at equal intervals. Covers 77, 78, and 79 are provided between the upper resistor element receiving position and the lower resistor element discharging position of the supply wheel 74 so as to cover the peripheral and side surfaces of the supply wheel 74. The resistance element receiving position on the cover 77 on the peripheral side is the opening/closing member 7
7a. A parts feeder 80 (see FIG. 3) is provided above the supply wheel 74, one end of a chute 81 is connected to the parts feeder 80, and the other end of the chute 81 is connected to the cover 7.
9 and communicated with the storage groove 76. A hole 82 is formed in the guide rail 67 at a lower position of the supply wheel 74.
2, the receiving member 83 of the resistor element R1 is connected to the screw 8.
4 is attached to the frame 28. This receiving member 83 is made of a non-magnetic material and, as is clear from FIG. It is inclined so that it becomes gradually lower from this receiving position toward the conveying direction of the conveying pallet 1. A magnet 85 is buried near the receiving position of the resistor element R1 in the receiving member 83, and
1 cap r2 can be attracted and reliably received. Falling resistance element R1
At the receiving position, a cam 86 is provided as an opening/closing means for the chucking device 13, as shown in FIGS. 8 and 9, for retracting and advancing the second chuck member 15. This cam 86 is attached to the guide rail 67, etc., and the second cam 86 is installed at the receiving position of the resistor element R1.
The large diameter portion 17 of the chuck member 15 rides on the slope 86a, and the second chuck member 15 hits the compression spring 1.
The large diameter portion 17 moves backward against the elasticity of
By descending from b, the second chuck member 15 is moved forward by the elasticity of the compression spring 19. A cam similar to the above is also provided at the discharging position 87 at the end of the conveying pallet 1 on the conveying side, that is, in front of the wheel 29d and the pair of sprockets (see FIG. 3).

Next, the operation of the above embodiment will be explained. Third
The resistance element R1 in the parts feeder 80 shown in the figure is stored in the storage groove 74 of the supply wheel 74 which is intermittently rotated by the chute 81 as shown in FIGS. 6 and 7.
will be supplied sequentially. Storage groove 76 of supply wheel 74
As the supply wheel 74 rotates, the resistor element R1 supplied thereto is guided by the covers 77, 78, and 79 and conveyed to the lower side. Cover 77, 78, 7
9, the resistor element R1 falls from the storage groove 76. On the other hand, the conveying pallet 1 and the chain 22 travel by the drive of the sprocket 30b as described above, and as they travel, the chucking device 13 at the position where the resistor element R1 falls, the large diameter portion 17 of the second chuck member 15 is moved. As is clear from FIGS. 8 and 9, the first chuck member 14 rides on the slope 86a of the cam 86 and resists the elasticity of the compression spring 19.
Retreat and open up. Therefore, the fallen resistor element R1 is supported on the receiving member 83 within the insertion hole 5 by the magnetic force of the magnet 85. The resistance element R1 supported on the receiving member 83 is conveyed while rolling on the receiving member 83 within the insertion hole 5 as the conveying pallet 1 travels. At a position where the resistor element R1 is transported a little forward from the falling position, the second chuck member 1
The large diameter portion 17 of No. 5 slides down the slope 86b of the cam 86 and moves forward with respect to the first chuck member 14 due to the elasticity of the compression spring 19, and the cap of the resistor element R1 is held by the first and second chuck members 14 and 15. Grip the outer end of r2. The resistor elements R1 thus sequentially supplied into the insertion holes 5 of the conveying pallet 1 are gripped by the chucking device 13 and conveyed. By this conveyance, first, it is sent to the undercoating device 33. As shown by the chain line in FIG. 2, a rotating wheel 88 is mounted as a rotating means on the upper part of the conveying pallet 1 while it is traveling, and is in contact with the large diameter portions 17 of the first and second chuck members 14 and 15 in the chucking device 13. A guide rail 67 is provided below the guide rail 67.
A coating wheel 90 is provided within the groove 89 formed in the groove 89, and the coating wheel 90 is immersed in paint in a paint tank 91 (see FIG. 3). During the travel of the conveying pallet 1, the large diameter portions 17 of the first and second chuck members 14 and 15
is pressed and rotated by the rotation wheel 88. During this time, the paint adhering to the painting wheel 90 is applied to the outer periphery of the insulator r1 of the resistor element R1 to form a paint film. Resistor element R1 after undercoating
is transported into the first drying oven 34, and during this time, the first
The large diameter portions 17 of the second chuck members 14 and 15 are rotated by friction with the guide portion 67a of the guide rail 67, and the resistive elements held by the first and second chuck members 14 and 15 are rotated. The body R1 also rotates, and paint dripping is prevented. The resistive element R1 is conveyed in a zigzag pattern from the bottom to the top in the drying oven 34 as described above, during which time the coating film is dried, and then conveyed to the outside through the outlet 44. Next, a top coating is applied to the outer periphery of the resistor element R1 by a top coating device 35 in the same manner as the undercoating device 33, and a coating film r3 is applied.
(see FIG. 16b) is formed. The resistive element R1 after being overcoated is transported into the second drying oven 36, during which time it is rotated in the same manner as above to prevent paint dripping, and is moved from the bottom to the top within the drying oven 36 as described above. During this time, the coating film r
3 is dried and transported to the outside through the outlet 52.
Next, the resistor element R1 is sent to a color code device 37. As is clear from FIG. 3, this color code device 37 is installed at a plurality of locations (three locations in the illustrated example) on a rotating wheel 8 in the same way as the coating devices 33 and 35 described above.
8 is provided, and a color disc 9 is provided corresponding to the lower side thereof.
2 are provided, and the lower part of each color disc 92 is immersed in color paint in a color paint tank (not shown). Each color disk 92 is a resistor element R1
Their positions are shifted in the axial direction. During the travel of the conveying pallet 1, the large-diameter portions 17 of the first and second chuck members 14 and 15 are sequentially pressed and rotated by the rotation wheel 88, and during this time, the collar discs 92 are sequentially used to provide resistance. Three color codes r4 (16th
(see Figure c) is applied. The color-coded resistor element R1 is conveyed in the third drying oven 38 upwardly in a zigzag manner as described above, and during this time the color code R4 is dried and conveyed to the outside through the outlet 61. Ru. The resistor R thus formed is connected to a cam 86 similar to that described above in the ejection position.
As a result, the second chuck member 15 moves back against the elasticity of the compression spring 19, thereby being released and ejected.

Note that in the first embodiment, the first, second, and third
In the drying ovens 34, 36, and 38, the conveying pallet 1 and the chain 22 are made to run in a zigzag pattern from the bottom to the top in a horizontal direction; It may also be made to run in a zigzag pattern in the vertical direction.

Next, a second embodiment of the present invention will be described. In this embodiment, as shown in FIGS. 10 and 11, a recessed groove 93 is formed in place of the through hole 8, and the first and second chuck members 14 are formed in this recessed groove 93.
and 15 are inserted into the lower half of the large diameter portion 17 of the first and second chuck members 14 and 15 as rotation means.
A friction plate 97 that contacts the large diameter portion 17 is provided above so as to be openable and closable, and the first and second chuck members 14 and 15 are rotated by the frictional resistance between the large diameter portion 17 and the friction plate 97. The other configurations are the same as those of the first embodiment. According to this embodiment, the strength of the conveying pallet 1 can be improved by providing the groove bottom.

Next, a third embodiment of the present invention will be described.
In this embodiment, as shown in FIG.
A tapered portion 17a is formed on the outer end side of the large diameter portion 17 of the chuck member 15.
The second chuck member 15 is pressed against the first chuck member 14 by rotating a with a rotating wheel 88 or the like, and the other configurations are the same as those of the first and second embodiments. It is.

Next, a fourth embodiment of the present invention will be described. In this embodiment, as shown in FIG. 13, a large number of unevenness 17b is formed along the axial direction on the outer periphery of the large diameter portion 17 of the first and second chuck members 14 and 15.
It is rotated by a rotating wheel 88 or the like, and also as shown in FIG.
As shown in FIG. 6, the guide portion 67a is brought into contact with the guide portion 67a for rotation, and as shown in FIGS. 10 and 11, the friction plate 97 is brought into contact to ensure reliable rotation. The other configurations are the same as those of the first and second embodiments.

In addition, in the above first and second embodiments, the first
It is also possible to provide the chuck portions 16 on both sides of the chuck member 14, and to provide a third chuck member on the opposite side of the second chuck member 15, so that the resistor elements R1 can be transported in two rows. Further, the second chuck member 15 has its outer end protruding to the side of the conveying pallet 1,
It can also be biased by a leaf spring.
Further, the resistor element R1 can be rotated after color coding and while being transported in a zigzag manner in the drying ovens 34, 36, and 38, if necessary. Further, instead of the cam 86, the opening/closing means may be a lever that reciprocates in the axial direction of the second chuck member 15 by a driving means. Furthermore, in the first embodiment, the large diameter portions 17 of the first and second chuck members 14 and 15
It is also possible to rotate the space narrower than the top and bottom.
In addition, the present invention can be modified in various ways without departing from its basic technical concept.

Effects of the Invention As is clear from the above description, according to the present invention, insertion holes through which cylindrical electronic components can be inserted horizontally are arranged in a large number of endless transport pallets, and each insertion hole is A chucking device capable of gripping both ends of the cylindrical electronic component from the axial direction of the cylindrical electronic component is rotatably supported within the hole, and the conveying pallets are connected endlessly and run in reverse, and are zigzag in the drying oven. The transport pallet is guided by a guide member, and the chucking device is opened and closed by an opening/closing means at a supply position and a discharge position of the cylindrical electronic component with respect to the insertion hole of the transport pallet. Therefore, both ends of the cylindrical electronic component can be gripped by the chucking device and transported smoothly and reliably, and the chucking device can be rotated.
Even if the cylindrical electronic components are small, they can be transported smoothly and reliably, thereby eliminating contamination of the cylindrical electronic components, improving economic efficiency, and saving labor. can be achieved.
Furthermore, since the cylindrical electronic component is gripped by the chuck device, it can be transported in a zigzag pattern within the drying oven, and the floor area occupied by the drying oven can be reduced.

[Brief explanation of the drawing]

1 to 9 show a first embodiment of the drying apparatus of the present invention, FIG. 1 is a partially cutaway perspective view of a conveying pallet, FIG. 2 is a cross-sectional view taken along the - arrow in FIG.
The figure is a partially cutaway schematic side view showing an example of a conveyance system, FIG. 4 is an enlarged view of the section in the direction of the arrow in FIG. 3, FIG. 5 is a plan view thereof, and FIG. 7 is a sectional view taken in the direction - arrow of FIG. 6; FIG. 8 is a plan view with the supply wheel removed in the supply section; FIG.
0 and 11 show a second embodiment of the present invention,
Figure 10 is a partially cutaway perspective view of the conveying pallet,
1 is a sectional view taken along the line XI-XI in FIG. 10, FIG. 12 is a perspective view of the second chuck member, and FIG. 13 is a perspective view of the second chuck member. 14a to 14c are perspective views showing the manufacturing order of resistors, and FIGS. 15 to 17 show a conveying device used in a conventional drying device. is a plan view of the main part of the conveyance section, the first
6 is a sectional view taken along the line A-A in FIG. 15, and FIG. 17 is a right side view of FIG. 16. 1... Transport pallet, 5... Insertion hole, 13...
Chucking device, 22... Chain, 32... Supply device, 33... Undercoating device, 34... First drying oven, 35... Top coating device, 36... Second drying oven, 37... Color Cord device, 38... third drying oven, 67... guide rail, 83... receiving member,
86...Cam (opening/closing means), R...Resistor, R1
...Resistor element, r1...Insulator, r2...Cap, r3...Coating film, r4...Color code.

Claims (1)

[Claims] 1. Insertion holes into which a cylindrical electronic component can be inserted sideways are arranged in a row, and within each insertion hole, a chucking device capable of gripping both ends of the cylindrical electronic component from the axial direction of the cylindrical electronic component is rotatable. A large number of conveying pallets supported by and configured in an endless manner,
a reversing drive device that connects the conveying pallets in an endless manner and causes them to travel inside and outside the drying oven and in a zigzag pattern within the drying oven; a guide member that guides the traveling of the conveying pallets; A drying device for cylindrical electronic components, characterized in that the drying device comprises an opening/closing means for opening and closing the chucking device at a supply position and a discharge position of the cylindrical electronic components with respect to the insertion holes of the conveying pallet outside the drying device.