JPH06126559A - Speaker assembling line - Google Patents

Abstract

PURPOSE:To substantially improve the efficiency of applying adhesives by providing a control device for stopping a tray at an adhesive applying station and allowing a nozzle to controllably trace an opening edge of a speaker frame on a mounting stand with approximately equal speed. CONSTITUTION:A non-circular speaker frame 7 is mounted on a tray 8 mounting stand 81. When the tray 8 stops at a station on which adhesives are applied to an opening part of the speaker frame 7, a lift rotary device and adhesive applying device A are operated the frame 7 together with the mounting stand 81 is lifted and rotated while adhesives flow out of a nozzle 5 of the adhesive applying device A to be applied to a non-circular opening part of the speaker frame 7. Thus, in the following process, the frame 7 can be transferred with the tray being mounted thereon without generating time loss for removing the frame 7 from the tray 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker assembly line.

[0002]

2. Description of the Related Art As shown in FIG.
8) and the vibration part (79), and the magnetic field part (78) is a pole piece.
An annular magnet (72) is bonded and fixed between the (71) and the plate (70). The vibrating part (79) has a cone (75), a damper (73), a voice coil (74), a gasket (76), and a dust cap (77) on the frame (7) fixed to the magnetic field part (78).
And the like are bonded and fixed.

In the case of a circular speaker, the application of the adhesive for adhering the above-mentioned respective parts can be performed by supporting the adhesive application nozzle at a fixed position, rotating only the frame, and applying the adhesive on the arc locus. It is easy to automate the speaker assembly line. However, in the case of a non-circular speaker, such as an elliptical speaker, the application of adhesive to the opening edge of the speaker frame to attach the cone and the adhesive to attach the gasket to the outer periphery of the cone is Since the coating nozzle has to be drawn in an elliptical locus relative to the speaker frame, there is a problem in that the adhesive coating efficiency is low.

[0004] Therefore, the applicant used to apply an adhesive for bonding a cone to the opening edge of the frame (7) of the elliptical speaker when assembling the cone to the frame of the elliptical speaker, as shown in FIGS. A computer-controlled adhesive application device has been proposed (JP-A-4-1196).
No. 7).

The above-mentioned adhesive applying device applies the adhesive to the opening edge of the frame (7) by moving the speaker frame (7) and the adhesive applying nozzle (5) relatively at a constant speed. There is a rotary base (290) that is connected to the rotary drive (200) and is rotatably arranged at a fixed position on the base (100) to support the speaker frame (7) in a removable manner, and a horizontal reciprocating drive.
(3) and the lifting drive device (4) are connected to the rotary table (290) so as to reciprocate and move up and down at right angles to the axis of the rotary table (290), and the adhesive discharge nozzle (5) with its tip facing downward is rotated. Drive (20
The control motor (201) of (0) and the control motor (30) of the horizontal reciprocating drive device (3) are connected to each other, and the nozzle (5) traces the elliptical opening edge of the speaker frame (7) at a substantially constant speed. And a control device (6) for controlling the above.

A plurality of points are assumed on the ellipse corresponding to the elliptical opening edge of the frame (7) of the elliptical speaker, the positions of the points are measured from a reference point, for example, the center of the ellipse, and the measured numerical value is controlled by the controller ( Enter in 6). Position and mount the elliptical speaker frame (7) on the turntable (290). The controller (6) applies the adhesive while the nozzle (5) traces the opening edge of the elliptical speaker at a constant speed. Since the speaker frame (7) is only rotated and the nozzle (5) is reciprocated, the rotation speed of the speaker frame (7) can be considerably increased, and the adhesive application efficiency can be dramatically improved.

[0007]

In assembling a speaker, there is a step of adhering the various speaker parts described above in addition to the adhering of the cone (75), and as described above, the opening of one speaker frame (7). Removing the speaker frame (7) from the turntable (290) and setting the next speaker frame (7) every time the edge is coated with adhesive causes a large time loss in the entire speaker assembly process. Too much. The present invention is intended to improve the speaker assembling efficiency by incorporating the adhesive applying device into the speaker assembling line.

[0008]

The present invention is a speaker frame.
A speaker assembly line in which an adhesive application station and a component supply station are provided along a conveyor (1) that conveys (7), and adhesive application devices A and B are provided in the adhesive application station, which is the conveyor (1) Are two endless intermittent belts arranged in parallel along the assembly line (11)
A tray comprising (11) and a mounting table (81) which is disposed across both belts (11) and (11) and on which the speaker frame (7) is mounted.
(8) and between the belts (11) and (11), which is provided corresponding to each adhesive application station, is composed of an elevating / rotating device (2) for lifting and rotating the mounting table (81), and a speaker. Each of the adhesive applying devices A for applying an adhesive to the non-circular opening for cone attachment of the frame (7) and an adhesive for attaching a gasket includes a horizontal reciprocating drive device (3) and a lifting drive device.
An adhesive discharge nozzle (5), which is connected to (4) and is arranged so as to be capable of reciprocating and ascending and descending in a plane orthogonal to the axis of the mounting table (81) and the tip of which is directed downward, and an elevating and rotating device (2). , Is connected to the control motor (30) of the horizontal reciprocating drive device (3) of the adhesive application device and the motor (14) for driving the conveyor, stops the tray (8) at the adhesive application station, and mounts the table (81). The control device (6) controls the nozzle (5) so that the nozzle (5) traces the opening edge of the upper speaker frame (7) at a substantially constant speed.

[0009]

[Operation and effect] The non-circular speaker frame (7) is mounted on the tray mounting table (81). When the tray (8) stops at the station for applying the adhesive to the opening of the speaker frame (7), the lifting and rotating device (2) and the adhesive applying device A are activated, and the frame together with the mounting table (81) is operated. As (7) is lifted and rotated, the adhesive flows out from the nozzle (5) of the adhesive application device A, and the adhesive is applied to the non-circular opening of the speaker frame (7). The next step is the frame
(7) can be conveyed while being placed on the tray (8), and there is no time loss for removing the frame from the tray.

By placing the tray (8) across the two belts (11) and (11), the mounting table (81) on the tray (8) is provided.
Lift and rotate the lifting device (2) that lifts and rotates the belt (11) (1
It became possible to deploy between 1). Even if the shape of the opening of the speaker frame is a non-circular shape such as an ellipse, it is necessary to apply the adhesive in a non-circular shape in two places, that is, the position where the cone is bonded to the frame and the position where the gasket is bonded. Other speaker components, such as dampers (73),
The voice coil (74) is circular regardless of the shape of the opening of the speaker frame, and the device for bonding these is
It can be done with the conventional circular adhesive application device.

[0011]

[Magnetic field assembly]

Apply adhesive to the pole piece (71) Adhere the magnet (72) to the pole piece (71) Apply adhesive to the magnet Adhere the plate (70) and frame (7) on the magnet Insert into the dryer for drying adhesive Dryer [Vibration part assembling first half part] Frame (7), damper (73), voice coil (74) (in the embodiment, a voice coil is fitted in the center of the damper in advance), and bonding to the cone (75) Applying agent and incorporating Gasket (76) loading Gasket (76) pressurizing Adhesive drying dryer Removal from dryer [second half of vibration part assembly] Solder lacquer application Adhesive application to dust cap Dust cap injection Dump agent Soldered terminals Soldered magnetized marking Naturally dried.

In the assembly of the non-circular speaker, the problem of the application of the adhesive is the application of the adhesive for attaching the cone to the frame and the application of the adhesive for attaching the gasket to the edge of the cone. The vibrating section assembly line shown in FIGS. 6 to 8 will be described below. 6 and 7 are plan views of the line, where FIG. 6 is the upstream side and FIG. 7 is the downstream side. 8 and 9 are front views of the line, where FIG. 8 is the upstream side and FIG. 9 is the downstream side.

The line is provided with nine working stations from the first station S1 to the ninth station S9 in order from the downstream side to the upstream side, and the first station S1 is operated by the suction type iron powder removing device C to make the frame (7). The iron powder adhering to is removed. The second station S2 applies an adhesive to the opening edge of the frame (7). The third station S3 applies an adhesive to the damper (73) mounting portion of the frame (7). A damper (73) is inserted into the fourth station S4.
The S5 station applies an adhesive to the fitting portion of the damper 73 and the voice coil 74. The sixth station S6 loads a cone (75). The seventh station S7 is a cone (7
Apply adhesive to the mating portion of 5) and the voice coil (74). The eighth station S8 applies an adhesive to the gasket (76) mounting portion. The ninth station S9 is loaded with the gasket (76).

At each loading station, speaker parts are supplied by an automatic machine or a manual work. An adhesive coating device is provided at each adhesive coating station, and the second station S2 and the eighth station S8, that is,
As will be described later, an adhesive application device A for a non-circular portion in which an adhesive application nozzle (5) reciprocates is provided in the station for applying the adhesive to the frame opening edge and the adhesive application station for the gasket mounting portion. In the other adhesive application stations, a general circular-part adhesive application device B is provided that allows the adhesive to flow out while the nozzle is stationary.

A conveyor (1) for intermittently moving the speaker frame (7) is provided on the assembly line,
(1) is two endless belts (11) (11) arranged in parallel along a line, and a plurality of trays (8) placed across the belts (11) (11). ). As shown in FIGS. 1 and 2, each belt (11) is a timing belt (11) in which grooves (12) orthogonal to the longitudinal direction of the belt (11) are formed on both front and back surfaces at equal intervals. The toothed pulleys (13) around which the belts (11) are stretched are respectively arranged on the upstream side and the downstream side, and the belts (11) circulate in a vertical plane. A control motor (14) is connected to the pulley (13a) on the downstream side, and a belt (11) has trays (8) placed on the belt at equal intervals by each control station (6) described below. Intermittently run to stop at.

The tray (8) has two belts (11) (1
Corresponding to the length between the outer edges of 1), the belt has two widths (11)
The mounting table (81) is fitted in a conical hole (85) formed in the center by cutting four corners of a rectangular plate slightly shorter than the length between the inner ends of (11). As shown in FIG. 4, ridges (84) (84) that fit into the groove (12) of the belt (11) are provided at both ends of the back surface of the plate. As shown in FIG. 3, the mounting table (81) has an inverted truncated cone shape,
A protrusion (82) for positioning the speaker frame is provided in the center, and an annular magnet rubber (83) is attached to surround the protrusion (82).

In each adhesive application station, an elevating / rotating device (2) for raising and rotating the mounting table (81) on the tray (8) is arranged between the belts (11) and (11). The elevating / rotating device (2) is provided with a spline shaft (22) arranged directly below the mounting table (81) on the fixed base (21) so as to be vertically movable and rotatably provided so as to project from the upper end of the shaft. The tray (8) is supported on the belts (11) and (11) by the support base (20), and only the mounting base (81) is lifted and rotated. The spline shaft (22) is a rotating body rotatably supported by the base (21).
It slidably penetrates through (23) and meshes with internal teeth (24) formed on the inner surface of the rotating body (23). The lower part of the rotating body (23) is a toothed pulley (25). A piece (26) having a peripheral groove (27) is fixed to the lower end of the spline shaft (22). Below the base (21), control motor (28) and cylinder
(201) is provided and the lever (203) rotates in the vertical plane.
Will be deployed. The motor (28) is connected to the toothed pulley (26) of the rotating body (23) via the timing belt (11). The lever (203) has a piston rod (202) whose base end is a cylinder (201).
The roller (204) pivotally supported at the tip of the fork.
It is fitted in the circumferential groove (27) of (26) in a rollable manner.

As shown in FIG. 2, the tray (8) is provided between the upper conveyance zone (11a) and the lower conveyance zone (11b) of the belt (11) at the upstream end and the downstream end between the belts (11). Elevating and rotating means (9) for delivering is provided. Lifting / rotating means of the embodiment
(9) is called a swing cylinder and is commercially available (for example, product number SDA40 × 200 × 9 manufactured by Koganei Co., Ltd.
In (0), the piston rod (92) housed in the cylinder tube (91) is moved up and down and rotated by the rotary actuator, and the linear movement and the rotational movement of the piston rod can be freely combined. A support member (93) is attached to the upper end of the piston rod (92).

The elevating and rotating means (9) on the downstream side is a belt (11).
Lift the tray (8) from the upper transfer belt (11a) just off the belt (11) and rotate it by 90 °, then lower it to a position slightly higher than the lower transfer belt (11b) and rotate 90 ° again. In this state, the protrusions on the lower surface of the tray (8) are slightly lowered until they fit into the grooves (12) on the inner surface of the belt (11). The lifting / lowering rotation means (9a) on the upstream side lifts the tray (8) from the lower transfer belt (11b) of the belt (11) as far as it is removed from the belt (11), and
Rotate it by 0 °, raise it to a position slightly higher than the upper conveyor belt (11a), rotate 90 ° again, and keep the tray in that state.
(8) The ridge (84) on the lower surface is slightly lowered until it fits into the groove (12) on the inner surface of the belt (11).

As shown in FIG. 1, each adhesive applying device A for applying an adhesive to the cone bonding opening of the speaker frame (7) and applying an adhesive for mounting the gasket (76) has an assembly line as shown in FIG. Support pillars (10) and (10) are provided along with, and the two horizontal guide shafts (31) and (31) and the horizontal screw shafts (32) are parallel between the guide shafts. And the horizontal screw shaft (32) is supported by the column (10). A servo motor (30) is connected to one end of the horizontal screw shaft (32). Both lateral guide shafts (31) (3
The slide member (33) is arranged so as to be slidable in the guide axis direction across the 1) and the horizontal screw shaft (32). Slide member (33)
The horizontal guide shaft (31) slidably penetrates through the horizontal screw shaft (32).
Is threaded through.

Brackets (34) and (34) project forward from the upper and lower ends of the slide member (33), and two vertical guide shafts (41) (41) and a vertical screw shaft (42) are provided between the brackets. ) Are arranged vertically, and the vertical screw shaft (42) is supported by the brackets (34) (34). A servo motor (40) is provided on the upper bracket (34) and is connected to the vertical screw shaft (42). An elevating member (43) is arranged across the vertical guide shaft (41) and the vertical screw shaft (42). The vertical guide shaft (41) slidably penetrates the elevating member (43), and the vertical screw shaft (42) is screwed through the member.

An adhesive discharge nozzle (5) is attached downward to the elevating member (43). The adhesive discharge nozzle (5) has a valve (not shown) inside, as is known from Japanese Utility Model Laid-Open No. 62-59176, and the adhesive pressure supply hose (51) and the pressure air hose for opening and closing the valve are provided. (52) is connected. The adhesive supplied into the adhesive nozzle (5) is discharged from the discharge port at the lower end through the valve, and when pressure air is sent from the pressure air hose (52) to the nozzle (5), the valve is closed and the adhesive is discharged. Stops. Pressure Air Hose (52)
A solenoid valve (53) for controlling air supply is connected to the.

Servo motors (30) (40) linked to the two screw shafts (32) (42), solenoid valves (53) of a pressure air hose (52),
Control device (6) for the control motor (28) and cylinder (201) of the tray lifting / lowering rotation device (2), the lifting / lowering rotation means (9) (9a), and each adhesive application device B for applying the circular portion adhesive. Are linked together. The control device (6) comprises a known programmable controller (62) and an input device (61) for inputting numerical values into the elliptical shape of the elliptical speaker and the circular shape when the adhesive is applied in a circular shape to the controller (62). Composed. In the input device (61), the cassette (63) into which the data calculated corresponding to the shape of the speaker to be assembled in advance is input is replaced according to the type of speaker, which controls all the operations of the line. It

The elliptical shape is input by assuming a plurality of points on the ellipse of the elliptical speaker frame (7) and representing the position of each point from the reference position by a numerical value, and in the embodiment, As shown in FIG. 12, the center of the ellipse is the reference point P, and the ellipse is
(8) is equally divided, for example, every 5 ° into 72 equal parts, and the point (82) where the ellipse (8) and the equal dividing line (81) intersect is two numerical values, the distance from the reference point P and the angle. It is represented by. In the above work, actually, draw the ellipse of the ellipse speaker on the paper, plot the intersection with the bisector in the 1/4 section surrounded by the major axis and the minor axis of the ellipse, and draw from the center of the ellipse of each point. Measure the distance. When the above work is performed on the curve of 1/4 of the ellipse,
Since the points in the adjacent sections are symmetrical with each other, it is possible to save the trouble of performing the above work for the entire circumference of the ellipse.

The control function for the horizontal screw shaft (32) of the adhesive application device A of the programmable controller (62) and the servo motors (30) (28) of the mounting table (81) is known as a continuous interpolation function. As described above, it is a function to trace a plurality of given points, that is, the points (82) and (82) on the ellipse continuously with a straight line or a curved line at a constant speed. The control function for the vertical screw shaft (42) is controlled by the lifting / lowering rotation device (2).
When the speaker frame (7) rises with 1), the nozzle (5) corresponds to the adhesive application height of the speaker frame.
This is a function of returning the nozzle 5 to the standby position by lowering it and rotating the mounting table 81 and thus the frame 7 by a predetermined angle.

In addition, in the embodiment, the programmable controller (6
2) controlled by. When the frame (7) is lifted by the elevating and rotating device (2), the nozzle (5) at the standby position moves laterally and is positioned on the opening edge of the speaker frame (7). The nozzle (5) descends to the adhesive application position, and in this state, the mounting table (81) of the tray (8), that is, the speaker frame (7) mounted on the mounting table is moved to the speaker frame ( 7) rotates. When the speaker frame (7) is rotated by 90 °, the adhesive is discharged from the nozzle (5) without stopping the rotation of the frame (7). When the speaker is rotated 360 ° after the adhesive is discharged, that is, when the speaker is rotated 450 ° from the start state, the discharge of the adhesive from the nozzle (5) is completed and the nozzle (5) rises. The speaker reverses 90 ° and returns to the original orientation. As described above, the discharge of the adhesive is started during the rotation of the speaker frame (7) because the timing of the rotation start of the speaker and the start of the discharge of the adhesive are made to coincide with each other, or the timing of the discharge of the adhesive is set to the speaker frame (7). This is because, if the rotation is started earlier than the rotation start, the amount of adhesive applied at the adhesive application start portion becomes larger than that at other portions.

After the assembly of the magnetic field portion is completed, the frame (7) having the pole piece (71) is attached to the tray at the upstream end.
Place on the mounting table (81) of (8). Engage the protrusion (82) of the mounting table (81) in the central hole (71a) on the back surface of the pole piece (71),
Further, positioning is performed by a rotation direction positioning means (not shown), and the frame (7) is attracted by the magnet rubber (83).

When the tray (8) is stopped at the first station, the iron powder removing device A sucks and removes the iron powder attached to the frame (7). Next, when the tray (8) is stopped at the second station S2, the raising and lowering rotation device (2) and the adhesive application device A are operated, and as described above, the nozzle (5) moves the opening edge of the elliptical speaker at a constant speed. Apply adhesive while tracing. When the application of the adhesive is completed after making a round around the opening edge of the speaker frame (7), the nozzle (5) rises and the speaker frame (7) is reversed by 90 °. As mentioned above, since the speaker frame (7) is rotated and the nozzle (5) is linearly moved, the movement is not unreasonable, and even if the rotation speed of the speaker is considerably increased, it is possible to carry out step-out like the conventional case. Instead, the adhesive can be applied to the opening edge of the frame (7) of the elliptical speaker having a major axis of 150 mm and a minor axis of 100 mm in 1.5 seconds.

Next, when the tray (8) is stopped at the third station S3, the elevating / rotating device (2) and the adhesive coating device B for the circular portion are actuated to circularly bond the central portion of the frame (7). The agent is applied. When the tray (8) is stopped at the fourth station S4, the frame (7) is automatically or manually operated.
Install the damper (with the voice coil (74) set on). When the tray (8) stops at the fifth station S5, the lifting / rotating device (2) and the adhesive coating device B for the circular portion
Thus, the adhesive is applied to the fitting portion between the damper and the voice coil (74).

When the tray (8) stops at the sixth station S6, the cone (75) is mounted on the frame (7). When the tray 8 stops at the seventh station S7, the adhesive is applied to the fitting portion of the cone 75 and the voice coil 74. When the tray 8 is stopped at the eighth station S8, the adhesive is applied to the gasket 76 mounting portion, that is, the outer peripheral edge of the cone 75. Tray (8) is the 9th station S
When stopped at 9, the gasket (76) is mounted on the frame (7).

The frame (7) on the tray (8) is a mounting table (81).
It is removed from the factory and handed over to the next drying process. Empty tray
When (8) reaches the downstream end of the conveyor (1) and stops, as described above, the lifting / rotating means (9) transfers the belt (11) from the upper conveyor belt (11a) to the lower conveyor belt (11b). Being the first
Lifting / rotating means on the upstream side, which is transported to the station S1 side
(9a) transfers the belt (11) from the lower conveyor belt (11b) to the upper conveyor belt (11a). Since the tray (8) is conveyed by engaging with the groove (12) of the timing belt (11) on both the going and returning sides, the deviation with respect to the belt (11), that is, the deviation of the timing can be prevented. Tray on the upper conveyor belt (11a) of the belt (11)
Every time (8) is supplied, the above operation is repeated to apply the adhesive to the speaker frame (7) and supply the parts, so that the speaker can be efficiently assembled.

The non-circular adhesive applying device A is not limited to the elliptical speaker, but can apply an adhesive to the opening edge of the frame (7) of the rectangular speaker shown in FIG. Then, the rectangle is equally divided into equal angles, and the point (82) where the rectangle and the equal dividing line intersect is represented by two numerical values, the distance from the center of the rectangle and the angle. In the assembly of the circular speaker, if the nozzle horizontal reciprocating drive device (3) of the non-circular part adhesive coating device A is not operated during the adhesive coating, it will be a normal circular part adhesive coating device. Since it works the same, it is possible to produce circular and non-circular speakers with one line. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a perspective view of an adhesive application device A and a tray.

FIG. 2 is a perspective view of a conveyor.

FIG. 3 is a cross-sectional view of a rotary lifting device.

FIG. 4 is a perspective view of the tray as viewed from the back.

FIG. 5 is a cross-sectional view of a speaker.

FIG. 6 is a plan view of the first half of the vibrating section assembly line.

FIG. 7 is a plan view of the latter half of the vibrating section assembly line.

FIG. 8 is a front view of the front half of the vibrating section assembly line.

FIG. 9 is a front view of the latter half of the vibrating section assembly line.

FIG. 10 is a perspective view of an adhesive applicator previously proposed by the applicant.

FIG. 11 is a front view of the above.

FIG. 12 is a front view of a frame of an elliptical speaker.

FIG. 13 is a front view of a rectangular speaker frame.

[Explanation of symbols]

 (11) Belt (2) Lifting / rotating device (5) Adhesive coating nozzle (7) Speaker frame (8) Tray (9) Lifting and rotating means

Claims (2)

[Claims] 1. A speaker assembly line in which an adhesive applying station and a component supplying station are provided along a conveyor (1) for conveying a speaker frame (7), and adhesive applying devices A and B are provided in the adhesive applying station. So, the conveyor (1) was installed in parallel along the assembly line.
A tray with a book (81) for mounting the speaker frame (7), which is placed across the belts (11) and (11), and an endless intermittent belt (11) (11) 8) and a belt (11) (11), which is arranged corresponding to each adhesive application station, and comprises an elevating / rotating device (2) that lifts and rotates the mounting table (81). Each adhesive application device A for applying an adhesive to the non-circular opening for cone adhesion of (7) and an adhesive for attaching a gasket includes a horizontal reciprocating drive device (3) and a lifting drive device (4). The adhesive discharge nozzle with the tip facing downward, which is arranged so as to reciprocate in the plane orthogonal to the axis of the mounting table (81) and can be moved up and down.
(5), vertical rotation device (2), horizontal reciprocating drive device for adhesive coating device
Control motor (30) of (3) and motor (14) for driving the conveyor
The tray (8) is stopped at the adhesive application station, and the nozzle (5) is controlled to trace the opening edge of the speaker frame (7) on the mounting table (81) at a substantially constant speed. A speaker assembly line comprising a control device (6). 2. Two endless belts (11) (1) arranged parallel to an assembly line and capable of intermittent rotation in a vertical plane.
1), a plurality of trays (8) placed across the belts (11) and (11), and the trays (8) disposed at the upstream end and the downstream end between the belts (11) and (11). 8) is composed of an elevating and rotating means (9) for elevating and rotating the belt by 90 °, and the upper conveyor belt (1) of the belt (11)
When 1a) stops at the downstream end, the supporting member (93) of the lifting / lowering rotation means (9) ascends and lifts the tray (8) from the upper transfer belt (11a), reverses it by 90 °, and then the belt (1
1) It descends and reverses 90 ° and transfers the tray (8) to the lower conveyor belt (11b), and the lifting / lowering rotation means (9a) on the upstream side performs the reverse operation to the lower part of the belt (11). Conveyor zone (11b)
A tray circulatory transfer device that transfers the tray to the upper transfer belt (11a).