CN109552942B

CN109552942B - Tray for conveying bobbin

Info

Publication number: CN109552942B
Application number: CN201811001322.2A
Authority: CN
Inventors: 井上敬
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2017-09-27
Filing date: 2018-08-30
Publication date: 2022-03-22
Anticipated expiration: 2038-08-30
Also published as: EP3461773A1; JP2019059591A; EP3461773B1; CN109552942A

Abstract

The invention provides a bobbin conveying tray. Fly waste is hard to be accumulated on the mesh of the bobbin conveying tray. The tray (3) is a member for mounting a full bobbin (5B) around which a spun yarn (Y) is wound, and has a tray main body (31) and a metal mesh member (33). The tray main body (31) has a mounting portion (3B) that is inserted into the full bobbin (5) and raises the full bobbin (5B), and is formed with an air flow hole (35) that penetrates from the upper end to the lower surface. The metal mesh member (33) is fixed in the air circulation hole (35) and allows the air to pass through but restricts the spinning yarn (Y) from passing through. The wires constituting the mesh of the mesh member (33) are in close contact with each other without causing displacement of the wires.

Description

Tray for conveying bobbin

Technical Field

The present invention relates to a bobbin conveying tray for mounting a bobbin around which a yarn is wound.

Background

Conventionally, there is known a bobbin conveying system in which a bobbin on which a yarn is wound is attached to a tray, and the tray on which the bobbin is attached is conveyed to a winder unit. Further, there is also known a bobbin conveyance system including a spinning machine adjacent to an automatic winder for spinning a yarn, and directly connecting the spinning machine to the automatic winder through a conveyance path.

The bobbin-conveying tray is formed with air flow holes that vertically penetrate the tray (see, for example, jp 62-70186 a). According to this structure, the yarn end can be unwound from the yarn layer by the suction air flow generated in the winding tube in a state where the bobbin is inserted in the tray, and further sucked into the bobbin (yarn threading operation).

The tray 1 disclosed in jp 62-70186 a has a yarn passage blocking member 12. The yarn passage blocking member 12 is provided in the middle of the air flow hole 7, and is a member for allowing air to flow but blocking the passage of the yarn. During the yarn threading operation, the yarn stopper member 12 prevents the yarn end from passing through the tray 1 and hanging downward.

This is because, when the yarn end is in a tensioned state in which the yarn hangs down to the outside of the bobbin 10, the yarn end comes into contact with the upper surface of the conveyor during the conveyance of the bobbin 10, and the yarn end is wound around a conveying mechanism such as a pulley.

The yarn passage preventing member is a metal mesh in a lattice shape, a nylon mesh, or a flat plate provided with small holes. When the mesh is a grid-like metal mesh, the mesh portion of the mesh may be entangled with burrs. In this case, since only the knitted yarn is not fixed and moves, the wire mesh is displaced between the vertical and horizontal wires due to the deposition of the fly during use, and the amount of fly deposition increases at this position, thereby deteriorating the air flow.

Disclosure of Invention

The purpose of the present invention is to make it difficult for fly waste to accumulate in a mesh of a bobbin conveyance tray.

Hereinafter, a plurality of embodiments will be described as means for solving the problem. These modes can be arbitrarily combined as needed.

A bobbin conveying tray according to an aspect of the present invention is for mounting a bobbin around which a yarn is wound, and includes a tray main body and a metal mesh member. The tray main body has a protrusion portion inserted into the bobbin to erect the bobbin, and an air flow hole penetrating from an upper end portion to a lower surface is formed. The metal mesh member is fixed in the air vent hole. The metal wires constituting the mesh of the mesh member are coupled to each other to restrict the movement of the metal wires at the crossing positions of the metal wires. In this tray, since the wires are not displaced from each other in the mesh member, fly entanglement is less likely to occur, and fly accumulation is less likely to occur. As a result, the service life of the mesh member can be extended.

The metal wires may be mutually welded by sintering. In this tray, the bonding strength between the wires of the mesh member is improved. Sintering is a process in which the metal mesh is maintained at a temperature around the melting point of the metal for a certain period of time, thereby forming crystals in the metal structure so as to cross the contacts between the wires and completely integrate the wires. The displacement of the metal wires of the mesh from each other can be prevented without using a coupling member other than the metal mesh.

The metal wires may be bonded to each other by rolling. The rolling process (rolling process) is a process in which the mesh is rolled by a rolling device or the like, thereby deforming the intersections of the metal wires so as to bite into each other, and the bonding force between the metal wires is increased by the deformation. The displacement of the metal wires of the mesh from each other can be prevented without using a coupling member other than the metal mesh.

The tray main body may have a recess for accommodating the mesh member. The bobbin conveying tray may further include a fixing bushing for fixing the mesh member to the recess by press-fitting the mesh member into the recess. In this tray, the mesh member can be fixed to the recess only by pressing the fixing bush into the recess, and therefore, the mesh member can be easily fixed and removed.

The bobbin conveying tray may further include a positioning bush disposed on the inner side of the mesh member in the recess. In this tray, since the positioning bush can constitute a portion to which the mesh member is attached, it is not necessary to improve the shape accuracy of the recess.

The mesh of the mesh member may allow air to pass therethrough but restrict the passage of the yarn, and the mesh member may have a thickness in the range of 50 to 100 meshes. In this tray, it is possible to effectively allow air to pass through and prevent the yarn from passing through.

The mesh member may have a wire diameter in the range of 0.05 to 0.2 mm. In this tray, it is possible to effectively allow air to pass through and prevent the yarn from passing through.

The mesh member may have an opening ratio of 30 to 60%. In this tray, it is possible to effectively allow air to pass through and prevent the yarn from passing through.

In the bobbin conveying tray according to the present invention, the fly waste is less likely to accumulate in the mesh.

Drawings

Fig. 1 is a schematic plan view of an automatic winder system using a tray according to an aspect of the present invention.

Fig. 2 is a diagram showing an overall configuration of the automatic winder.

Fig. 3 is a side view showing the tray with the bobbin attached.

Fig. 4 is a perspective view of the tray.

Fig. 5 is a cross-sectional view of the tray.

Fig. 6 is a side view showing a state in which a yarn end is prepared by a yarn threading device.

Fig. 7 is a partially enlarged view of the mesh member.

Fig. 8 is a partial sectional view of the tray showing the operation of attaching the mesh member.

Fig. 9 is a partial sectional view of the tray showing the operation of attaching the mesh member.

Fig. 10 is a partial sectional view of the tray showing the operation of attaching the mesh member.

Fig. 11 is a partial sectional view of the tray showing the operation of attaching the mesh member.

Detailed Description

1. Embodiment 1

(1) Automatic winder system

An automatic winder system 101 according to an embodiment of the present invention will be described with reference to fig. 1 and 2. Fig. 1 is a schematic plan view of an automatic winder system using a tray according to an aspect of the present invention. Fig. 2 is a diagram showing an overall configuration of the automatic winder. The automatic winder system 101 includes an automatic winder 102, a bobbin processing device 103, and a bobbin supplying device 104. The automatic winder 102 is provided on the left side of the bobbin processing device 103 in the drawing. The bobbin processing device 103 is disposed between the bobbin supplying device 104 and the automatic winder 102.

As shown in fig. 1 and 2, the automatic winder 102 includes a plurality of winding units 105. The winding unit 105 is a device that unwinds the spun yarn wound around the full bobbin 5B (described later) onto another bobbin to manufacture a spun yarn product package. As shown in fig. 1, the automatic winder 102 is provided with a supply path 106 for conveying the full bobbin 5B to each take-up unit 105. Further, the automatic winder 102 is provided with a recovery path 107 for conveying the empty bobbin 5A discharged from each winding unit 105. The supply path 106 and the recovery path 107 are configured by a belt conveyor or the like, and transport the bobbin 5 using the tray (bobbin transport tray) 3.

The bobbin processing device 103 is a device as follows: an empty bobbin 5A (described later) discharged by the automatic winder 102 is pulled out from the tray 3, and a full bobbin (yarn supplying bobbin) 5B, which is configured by winding a spun yarn generated by a spinning machine (not shown) around a bobbin main body, is attached to the tray 3, and the full bobbin 5B is supplied to the automatic winder 102. The bobbin supplying device 104 is a device that supplies the full bobbin 5B to the bobbin processing device 103.

(2) Tray and bobbin

The tray 3 and the bobbin 5 will be described with reference to fig. 3 to 5. Fig. 3 is a side of the tray with the bobbin installed. Fig. 4 is a perspective view of the tray. Fig. 5 is a cross-sectional view of the tray. The tray 3 is a conveyance body for conveying the bobbin 5. As shown in fig. 3 and 4, the tray 3 includes a disk-shaped base portion 3a and a cylindrical mounting portion 3b as a bobbin insertion portion projecting upward from the center of the upper surface of the base portion 3 a. The tray 3 has an intermediate cylindrical portion 3c as a bobbin mounting portion between the base portion 3a and the mounting portion 3 b. The intermediate cylindrical portion 3c has a seating surface 67 on which the bobbin 5 is seated, and an outer peripheral surface 69. The tray 3 conveys the bobbin 5 in a posture in which the bobbin 5 is inserted into the mounting portion 3 b. The internal structure of the tray 3 will be described later.

The bobbin 5 is a cylindrical member for winding the spun yarn Y around the outer peripheral surface thereof, and has a through-hole 5a (fig. 6). By inserting the bottom of the bobbin 5 into the mounting portion 3b of the tray 3, the bobbin 5 is set on the tray 3 and conveyed together with the tray 3 as shown in fig. 3. In the following description, the bobbin itself around which the spun yarn Y is not wound is referred to as an empty bobbin 5A, and the bobbin and the spun yarn Y wound around the bobbin are collectively referred to as a full bobbin 5B.

(3) Bobbin processing device

The bobbin processing device 103 will be described with reference to fig. 1. The bobbin processing device 103 includes a tray conveyance line 108 as a conveyance unit for full bobbins and empty bobbins, which conveys full bobbins and empty bobbins in a state of being placed on the tray 3. The tray line 108 is connected to the supply line 106 and the recovery line 107 of the automatic winder 102. The tray 3 with the full bobbin 5B attached thereto is supplied from the bobbin processing device 103 to the winding unit 105 through the tray conveyance line 108 and the supply path 106. The tray 3 with the empty bobbin 5A attached thereto is returned from the winding unit 105 to the bobbin processing device 103 via the recovery path 107 and the tray transfer line 108.

The pallet feed line 108 has a main feed line 121 and a return feed line 122. The main conveyor line 121 is a path as follows: the empty bobbin 5A discharged from the automatic winder 102 is conveyed, the empty bobbin 5A is replaced with a full bobbin 5B in the middle, and the full bobbin 5B is conveyed toward the automatic winder 102. The main transport line 121 is formed in a substantially U-shape. Here, the leading end of the main line 121 is connected to the trailing end of the recovery path 107, and the trailing end of the main line 121 is connected to the leading end of the supply path 106. The bobbin drawing device 11 and the full bobbin supplying device 13 are arranged along the main feed line 121.

The bobbin extracting device 11 is a device for extracting and collecting the empty bobbin 5A from the tray 3. The full bobbin supply device 13 is a device for mounting the full bobbin 5B manufactured by the spinning machine on the tray 3 in a substantially upright state. The full bobbin 5B is supplied to the full bobbin supplying device 13 by the bobbin supplying device 104 such as an automatic bobbin feeding mechanism.

Although not shown, the full bobbin supply device 13 includes a bobbin loading device, a bobbin distribution device, and a pair of bobbin chutes. The full bobbin supplying device 13 can simultaneously supply the empty bobbin 5A to the tray 3 at two places by the bobbin dispensing device and the pair of bobbin chutes. The bobbin chute is provided with a bobbin 5 so as to be inserted into the mounting portion 3b of the tray 3. The bobbin chute is formed of, for example, each divided piece obtained by dividing a tapered cylindrical body into two parts in the axial direction.

On the main transport line 121, a package yarn unwinding device 15, a yarn end processing device 17, and a yarn threading device 19 are arranged as a bobbin preparation system in the downstream direction of the full bobbin supply device 13 in the transport direction. The bobbin preparation system performs the following operations on the full bobbin 5B so that the yarn can be smoothly unwound in the automatic winder 102, and supplies the full bobbin to the automatic winder 102. The covered yarn unwinding device 15 is a device for winding and removing the covered yarn wound around the bottom covered yarn of the full bobbin 5B.

The yarn end processing device 17 is a device for cutting the rewinding yarn wound around the surface of the yarn layer of the full bobbin 5B and removing the yarn end side thereof. The lead device 19 is a device as follows: the yarn end is separated from the surface of the full bobbin 5B to be fed, and the fed yarn end is wound around the top of the bobbin 5 and inserted into an opening (top hole) of the shaft hole 5a of the bobbin 5. This makes it possible to obtain a state (described later) in which the yarn end can be smoothly pulled out from the full bobbin 5B in the automatic winder 102.

The return feed line 122 is a path for reprocessing the full bobbin 5B in which the wire processing has failed, for example. The return line 122 is a bypass path connecting the leading end portion and the trailing end portion of the main line 121. In the present embodiment, a group of the package yarn unwinding device 15, the yarn end processing device 17, and the yarn threading device 19 is also arranged on the return line 122. The description of these devices is omitted.

(4) Movement of the trays

Hereinafter, the movement of the tray 3 will be described with reference to fig. 1. When the empty tray 3 reaches a position directly below a bobbin chute (not shown) of the full bobbin supplying device 13, the full bobbin 5B is placed on the empty tray 3 in a substantially upright state.

Next, the tray 3 is conveyed along the main conveyance line 121 toward the package yarn unwinding device 15 on the downstream side. In the package yarn unwinding device 15, the bottom package yarn formed on the full bobbin 5B is removed. Subsequently, the full bobbin 5B is conveyed along the main conveyance line 121 toward the yarn end processing device 17. In the yarn end processing device 17, the rewinding yarn wound around the surface of the yarn layer of the full bobbin 5B is cut to form a leading end side winding portion.

Subsequently, the full bobbin 5B is conveyed along the main conveyance line 121 toward the wire-threading device 19. In the wire-drawing device 19, the distal-end winding portion is sucked upward, and then inserted into the inside of the cylindrical body of the full bobbin 5B. Subsequently, the full bobbin 5B is further conveyed downstream along the main conveyance line 121, and is supplied to the supply path 106 of the automatic winder 102. The full bobbin 5B is conveyed along the supply path 106 and supplied to any one of the winding units 105.

In the winding unit 105, the yarn is unwound from the full bobbin 5B, and the unwound yarn is wound into a package. The tray 3 on which the empty bobbin 5A from which all the surrounding yarn is unwound is discharged from the winding unit 105 and returned to the main transport line 121 of the bobbin processing device 103 again through the recovery path 107. In the main transport line 121, the bobbin extracting device 11 extracts the empty bobbin 5A placed on the tray 3.

(5) Lead wire device (detailed description)

The wire-threading device 19 will be described with reference to fig. 6. Fig. 6 is a side view showing a state in which a yarn end is prepared by a yarn threading device. As shown in fig. 6, the yarn threading device 19 includes a yarn suction tube 91, a cutter 92, a yarn suction portion 93, and a yarn detection sensor 95. The yarn suction tube 91 has a bellows portion that is expandable and contractible in the vertical direction, and is arranged to be able to cover the tip end portion of the bobbin 5B from above by being extended. The yarn suction tube 91 is connected to a negative pressure supply device 99 via a pipe 97, and can suck the leading end winding portion. A cutter 92 capable of cutting the spun yarn Y is disposed at a connection portion between the yarn suction tube 91 and the pipe 97. Further, a yarn detection sensor 95 is disposed in the pipe 97. The yarn detection sensor 95 detects the spun yarn Y, and thereby can detect whether or not the spun yarn Y is successfully caught.

The yarn suction portion 93 is a tubular member connected to the negative pressure supply device 99, and has a suction port 93a formed at one end thereof and opening upward so as to face the lower surface of the tray 3 supporting the full bobbin 5B. Further, since the air flow holes 35 (described later) are formed in the tray 3 in the vertical direction, suction flow can be generated in the upper end portion of the shaft hole 5a of the full bobbin 5B by sucking air from the yarn suction portion 93.

When the bobbin 5B is fully fed, the yarn threading device 19 extends the bellows portion of the yarn suction tube 91 to cover the yarn winding portion of the full bobbin 5B, generates a suction air flow in the tube of the yarn suction tube 91, and sucks the winding portion on the tip side of the full bobbin 5B to capture the end of the yarn.

When the yarn detecting sensor 95 detects that the yarn end is successfully caught, the yarn threading device 19 retracts the bellows portion of the yarn suction tube 91, and then operates the cutter 92 to cut the spun yarn Y. Then, a suction airflow is generated in the airflow hole 35 of the tray 3 and the shaft hole 5a of the full bobbin 5B by the yarn suction portion 93, and the yarn end is caught by being sucked from the upper end of the shaft hole 5a of the full bobbin 5B. In this way, the state in which the yarn end is inserted into the inside of the full bobbin 5B from above can be prepared.

Thereafter, the full bobbin 5B is supplied to the winding operation in the automatic winder 102. Accordingly, in the automatic winder 102, by introducing compressed air from the hole on the root side of the full bobbin 5B prepared by the yarn threading device 19, the yarn end in the tube of the full bobbin 5B can be easily blown upward, and the yarn end can be caught by the yarn catching portion (not shown) above and connected by the yarn splicing device to be wound into a package. As a result, the winding operation of the spun yarn Y by the automatic winder 102 can be smoothly started.

(6) Internal structure of tray

The internal structure of the tray 3 will be described with reference to fig. 5. The tray 3 is a member for mounting the full bobbin 5B around which the spun yarn Y is wound, and includes a tray main body 31 and a metal mesh member 33. As described above, the tray main body 31 has the mounting portion 3B (an example of a projection) which is inserted into the full bobbin 5B to raise the full bobbin 5B. The tray main body 31 is formed with an air flow hole 35 penetrating from the upper end to the lower surface. Specifically, the air flow hole 35 penetrates the base portion 3a and the mounting portion 3 b.

The mesh member 33 is fixed in the air flow hole 35, allowing air to pass through but restricting the yarn from passing through. Specifically, the mesh member 33 is circular in a plan view. In fig. 7, the wires constituting the mesh of the mesh member 33 are coupled to each other to regulate the movement of the wires at the wire intersection position. Fig. 7 is a partially enlarged view of the mesh member. When the yarn end fed by the yarn feeding device 19 is inserted into the top hole of the bobbin 5 through the mesh member 33, the yarn end does not penetrate the tray 3 and protrude downward even if the yarn end moves downward through the air flow hole 35 of the tray main body 31.

In this tray 3, since the wires are not displaced from each other in the mesh member 33, the entanglement of the fly hardly occurs, and the fly accumulation hardly occurs. As a result, the service life of the mesh member 33 can be extended.

Specifically, the metal wires are welded to each other by sintering. Therefore, the bonding strength between the wires of the mesh member 33 is improved.

The tray main body 31 has a recess 37 for accommodating the mesh member 33. Specifically, the air flow hole 35 has a large diameter portion 35a on the base portion 3a side and a small diameter portion 35b on the mounting portion 3b side, and the large diameter portion 35a is a recess 37. A stepped portion 35c is formed at the boundary between the large diameter portion 35a and the small diameter portion 35 b.

The tray 3 has a fixing bush 39. The fixing bush 39 is a member that is press-fitted into the recess 37 to fix the mesh member 33 to the recess 37. The fixing bush 39 is formed of an elastically deformable material and has flat upper and lower surfaces. Specifically, the fixing bush 39 fixes the mesh member 33 supported by the stepped portion 35c to the stepped portion 35 c. In this way, the mesh member 33 can be fixed to the recess 37 only by pressing the fixing bush 39 into the recess 37, and therefore, the mesh member 33 can be easily fixed and removed.

The tray 3 has a positioning bush 41. Positioning bush 41 is disposed on the back side of mesh member 33 in recess 37. The positioning bush 41 is formed of an elastically deformable material, and has flat upper and lower surfaces. Specifically, the positioning bush 41 is disposed in contact with the stepped portion 35c, and realizes a flat surface for receiving the mesh member 33. In this way, since the position to which mesh member 33 is attached can be configured by positioning bush 41, it is not necessary to improve the shape accuracy of recess 37.

The mesh member 33 is made of, for example, stainless steel. However, the kind of the metal is not limited. The mesh member 33 has a mesh thickness in the range of 50 to 100 meshes, and allows air to pass therethrough but restricts the passage of the yarn. The mesh member 33 has a wire diameter in the range of 0.05 to 0.2 mm. The mesh member 33 has an opening ratio in the range of 30 to 50%. In this tray 3, air can be effectively allowed to pass through and the yarn can be prevented from passing through.

(7) Mounting operation of mesh member

The operation of attaching the mesh member 33 to the tray main body 31 will be described with reference to fig. 8 to 11. First, as shown in fig. 8, the tray main body 31 is prepared. Next, as shown in fig. 9, the positioning bush 41 is fitted into the recess 37. Specifically, the positioning bush 41 is disposed on the step portion 35c of the recess 37.

Next, as shown in fig. 10, the mesh member 33 is placed on the positioning bush 41 in the recess 37. Specifically, the outer peripheral edge portion of the mesh member 33 is placed on the circumferential plane of the positioning bush 41. Finally, as shown in fig. 11, fixing bush 39 is press-fitted into recess 37, and mesh member 33 is fixed to recess 37. Specifically, the fixing bush 39 is disposed on the step portion 35c of the recess 37. As a result, the outer peripheral edge portion of the attachment mesh member 33 is sandwiched between the fixing bush 39 and the positioning bush 41. In addition, the operation of detaching the mesh member 33 is performed in reverse order.

2. Features of the embodiments

The above embodiments can be explained as follows. The bobbin conveying tray (e.g., tray 3) is a bobbin conveying tray (e.g., tray 3) for mounting a bobbin (e.g., full bobbin 5B) around which a yarn (e.g., spun yarn Y) is wound, and includes a tray main body (e.g., tray main body 31) and a metal mesh member (e.g., metal mesh member 33). The tray main body has a protrusion (for example, a mounting portion 3b) inserted into the bobbin to raise the bobbin, and is formed with an air flow hole (for example, an air flow hole 35) penetrating from an upper end portion to a lower surface. The metal mesh member is fixed in the air vent hole, and allows air to pass through but restricts the passage of the yarn. The metal wires constituting the mesh of the mesh member are closely attached to each other without causing displacement of the metal wires. In this tray, since the wires are not displaced from each other in the mesh member, it is difficult to generate fly entanglement and fly accumulation. As a result, the service life of the mesh member can be extended.

3. Other embodiments

While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. In particular, the plurality of embodiments and modifications described in the present specification can be combined as desired.

The position of the mesh member fixed to the air flow hole of the tray main body is not limited to the above embodiment. The mesh member may be disposed at the tray tip or the tray main body. The means for fixing the mesh member to the tray main body is not limited to the annular bush. Other means such as adhesion may be used. The positioning bush 41 may also be omitted. Instead of welding the wires to each other by sintering, the wires may be rolled by a rolling device or the like to deform the wires so that the intersecting portions of the wires bite into each other. The deformation improves the bonding force between the metals, and the metal wires of the mesh can be prevented from being displaced from each other without using a bonding member other than the metal mesh.

The present invention is widely applied to a tray for conveying bobbins.

Claims

1. A bobbin conveying tray for mounting a bobbin around which a yarn is wound, comprising:

a tray main body having a protrusion portion inserted into the bobbin to erect the bobbin, and having an air flow hole penetrating from an upper end portion to a lower surface; and

a metal mesh member fixed in the air flow hole,

the metal wires constituting the mesh of the mesh member are coupled to each other to restrict the movement of the metal wires at the crossing positions of the metal wires,

the mesh of the mesh member allows air to pass through but restricts the passage of the yarn, and the mesh member has a thickness in the range of 50 to 100 meshes.

2. The tray for transporting bobbins as set forth in claim 1, wherein,

the metal wires are mutually welded by sintering.

3. The tray for transporting bobbins as set forth in claim 1, wherein,

the metal wires are bonded to each other by rolling.

4. The tray for bobbin conveyance according to any one of claims 1 to 3, wherein,

the tray main body has a recess for accommodating the mesh member,

the bobbin conveying tray further includes a fixing bushing that fixes the mesh member to the recess by press-fitting the fixing bushing into the recess.

5. The tray for transporting bobbins as set forth in claim 4, wherein,

the bobbin conveying tray further includes a positioning bush disposed in the recess to determine a position of the mesh member and the fixing bush.

6. The tray for bobbin conveyance according to any one of claims 1 to 5, wherein,

the mesh member has a wire diameter in the range of 0.05 to 0.2 mm.

7. The tray for bobbin conveyance according to any one of claims 1 to 6, wherein,

the mesh member has an aperture ratio in the range of 30 to 60%.