A Reel automatic feeding mechanism for an ARC automatic disc changer

Abstract

The present invention discloses a Reel automatic feeding mechanism of an ARC automatic disc changer, comprising a silo fixed bottom plate with a blanking circular hole, at least three groups of Reel size switching modules evenly distributed around the edge of the blanking circular hole are arranged on the silo fixed bottom plate; a Reel disc dividing module evenly distributed around the edge of the blanking circular hole is arranged at the bottom of each group of Reel size switching modules; an openable disc dividing bracket is arranged below the silo fixed bottom plate, and a disc dividing bracket rotating device and a Reel blanking positioning device are arranged on the back of the disc dividing bracket. The present invention realizes the automatic feeding of Reels and the automatic switching between Reels of different sizes, can meet the automatic feeding requirements of Reels of various sizes, has the advantages of reasonable layout, high safety, humanization, small size, simple structure, easy cleaning, easy maintenance, etc., improves production efficiency, makes full use of space, reduces labor costs, and ensures safe production.

Description

Technical Field

[0001] The invention belongs to the field of semiconductor packaging, and in particular relates to a Reel automatic feeding mechanism of an ARC automatic disc changer, which is mainly used for processes such as IC tape packaging and small parts tape packaging in the semiconductor industry. Background Art

[0002] In the semiconductor industry, tape and reel (reel, reel, reel, drum) are the main packaging materials for IC and are important products for IC storage, transportation and back-end feeding. Tape, also known as IC tape, is a tape that can be used to decorate multiple electronic components with a tape, and then the tape is wound on a reel. With the rapid development of science and technology, the semiconductor industry has also developed rapidly. Combined with the current trend of automation development, the automatic feeding of reels is particularly important.

[0003] According to different IC specifications, there are many types and sizes of tapes and reels. The existing reel feeding mechanism usually only corresponds to one size of reel and does not have the function of automatically switching between reels of multiple specifications. In addition, the existing reel feeding mechanism has a relatively complex structure and occupies a large space.

[0004] Whether the design of the reel feeding mechanism is reasonable or not directly affects the production capacity, work efficiency and production cost on site. A good layout can also reduce the space occupied by the entire mechanism and reduce the construction cost of the mechanism. Therefore, the industry is in urgent need of an automatic feeding mechanism that can be compatible with reels of various sizes to meet market demand. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides an automatic reel feeding mechanism for an ARC automatic disc changer to realize automatic reel feeding and automatic switching between reels of different sizes.

[0006] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A reel automatic feeding mechanism of an ARC automatic disc changer comprises a hopper fixed bottom plate, a blanking circular hole for reel disc separation is arranged in the center of the hopper fixed bottom plate, at least three groups of reel size switching modules are arranged on the hopper fixed bottom plate, all of the reel size switching modules are evenly distributed around the edge of the blanking circular hole, and together form a reel hopper mechanism with adjustable diameter; a reel disc separation module is arranged at the bottom of each group of the reel size switching modules, all of the reel disc separation modules are evenly distributed around the edge of the blanking circular hole, and together form a reel disc separation mechanism; a disc separation bracket which can be opened and closed relative to the blanking circular hole is arranged below the hopper fixed bottom plate, a disc separation bracket rotating device for driving the disc separation bracket to open and close is arranged on one side of the back side of the disc separation bracket, and a reel blanking positioning device for positioning the reel dropped on the disc separation bracket is arranged in the middle of the back side of the disc separation bracket.

[0008] Furthermore, the fixed bottom plate of the silo is an annular structure or a C-shaped structure.

[0009] Furthermore, the reel size switching module is composed of a first reel size switching cylinder, a second reel size switching cylinder, a reel limit block, a second reel size switching cylinder fixed block, a first linear slide rail, a second linear slide rail and a reel disk module fixed block, the first reel size switching cylinder is horizontally fixed to the upper surface of the silo fixed bottom plate, and the telescopic rod of the first reel size switching cylinder is aligned with the center of the blanking circular hole, the reel limit block is vertically arranged on the telescopic rod of the first reel size switching cylinder, the second reel size switching cylinder fixed block is slidably arranged on the lower surface of the silo fixed bottom plate through the first linear slide rail, and the movement direction of the second reel size switching cylinder fixed block is consistent with the movement direction of the first reel size switching cylinder The moving direction is parallel up and down; the reel disk partition module fixing block is slidably set on the lower surface of the second reel size switching cylinder fixing block through the second linear slide rail, and the moving direction of the reel disk partition module fixing block is parallel up and down with the moving direction of the second reel size switching cylinder fixing block, the front end of the reel disk partition module fixing block is fixedly connected to the reel limit block, the second reel size switching cylinder is set on the side surface of the second reel size switching cylinder fixing block, and the moving direction of the second reel size switching cylinder is parallel up and down with the moving direction of the first reel size switching cylinder, and the telescopic rod of the second reel size switching cylinder is fixedly connected to the side surface of the reel disk partition module fixing block through the reel disk partition module fixing block connecting piece.

[0010] Furthermore, the reel disk dividing module is composed of a reel disk dividing cylinder, a reel disk dividing support block, a third linear slide rail and a reel disk dividing support block fixed block, the reel disk dividing cylinder is arranged on the side surface of the reel disk dividing module fixed block, and the movement direction of the reel disk dividing cylinder is vertically parallel to the movement directions of the first reel size switching cylinder and the second reel size switching cylinder, the reel disk dividing support block fixed block is slidably arranged on the lower surface of the reel disk dividing module fixed block through the third linear slide rail, and the movement direction of the reel disk dividing support block fixed block is vertically parallel to the movement direction of the reel disk dividing module fixed block, the telescopic rod of the reel disk dividing cylinder is fixedly connected to the side surface of the reel disk dividing support block fixed block through the reel disk dividing support block fixed block connector, and the reel disk dividing support block is arranged on the lower surface of the reel disk dividing support block fixed block.

[0011] Furthermore, the reel silo mechanism is suitable for reels with a size of 7 to 13 inches and a thickness of 8 to 24 mm.

[0012] Furthermore, the reel silo mechanism has a storage capacity of 30 reels.

[0013] Furthermore, a pair of reel in-place sensors for sensing whether a reel is present are symmetrically arranged on the left and right sides of the tray tray.

[0014] Furthermore, the silo fixed bottom plate and the sub-plate bracket are rotatably connected via a sub-plate bracket fixing bracket and a sub-plate fixing connecting piece, the upper end of the sub-plate bracket fixing bracket is fixedly connected to the lower surface of the silo fixed bottom plate, one end of the sub-plate fixing connecting piece is fixedly connected to the lower surface of the sub-plate bracket, and the other end of the sub-plate fixing connecting piece is hinged to the lower end of the sub-plate bracket fixing bracket.

[0015] Furthermore, the disc tray rotating device includes a pen-shaped cylinder, the bottom end of the pen-shaped cylinder is hinged to a pen-shaped cylinder fixing bracket fixed under the disc tray, and the top end of the telescopic rod of the pen-shaped cylinder is hinged to a pen-shaped cylinder connecting plate fixed on the lower surface of the disc tray.

[0016] Furthermore, the reel blanking positioning device includes a reel positioning cylinder, a reel positioning pin is provided at the end of the telescopic rod of the reel positioning cylinder, a reel positioning hole concentric with the blanking circular hole is provided in the middle of the plate dividing bracket, the reel positioning cylinder is installed on the back side of the plate dividing bracket through a reel positioning cylinder fixing bracket, and the reel positioning pin is aligned upward with the reel positioning hole; when the telescopic rod of the reel positioning cylinder is extended, the reel positioning pin extends upward from the reel positioning hole, and when the telescopic rod of the reel positioning cylinder is retracted, the reel positioning pin retreats downward into the reel positioning hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention realizes automatic feeding of Reels and automatic switching between Reels of different sizes, which can meet the automatic feeding needs of Reels of various sizes. It has the advantages of reasonable layout, high safety, humanization, small size, simple structure, easy cleaning, easy maintenance, etc. It not only greatly improves production efficiency, but also makes full use of space, reduces labor costs, and ensures safe production.

[0019] 2. The present invention is applicable to Reels ranging from 7 inches to 13 inches and 8mm to 24mm thick. All Reel size switching modules adopt automatic switching by cylinders, which can realize one-key automatic switching between Reels of different specifications, and has stronger adaptability than the products currently on the market.

[0020] 3. The present invention can store up to 30 reels at a time, and can add or take out reels at any time without stopping the machine. This can save manpower, reduce the labor intensity of personnel, and reduce the time wasted by personnel changing reels while ensuring the high quality of the product, thereby improving the production efficiency of the equipment.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a front structural stereogram of the present invention;

[0024] Figure 2 It is a back structural stereogram of the present invention;

[0025] Figure 3 This is an enlarged view of one side of the Reel size switching module and the Reel disc dividing module in the present invention;

[0026] Figure 4 This is an enlarged view of the other side of the Reel size switching module and the Reel disc dividing module in the present invention;

[0027] Figure 5 It is an enlarged front view of the tray-dividing bracket, the tray-dividing bracket rotating device, and the reel blanking positioning device in the present invention;

[0028] Figure 6 It is an enlarged back view of the tray-dividing bracket, the tray-dividing bracket rotating device, and the reel blanking positioning device in the present invention;

[0029] Figure 7 The figure is an assembly diagram of the present invention and a Reel of one specification. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The descriptions herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0031] See also Figure 1-2 As shown, a reel automatic feeding mechanism of an ARC automatic reel changer comprises a hopper fixed bottom plate 1, a blanking circular hole 2 for reel separation is arranged in the center of the hopper fixed bottom plate 1, at least three groups of reel size switching modules 3 are arranged on the hopper fixed bottom plate 1, all the reel size switching modules are evenly distributed around the edge of the blanking circular hole 2, and together form a reel hopper mechanism with adjustable diameter; a reel separation module is arranged at the bottom of each group of the reel size switching modules Group 4, all the reel dividing modules are evenly distributed around the edge of the blanking circular hole 2, and together form a reel dividing mechanism; a dividing tray bracket 5 which can be opened and closed relative to the blanking circular hole 2 is arranged below the fixed bottom plate 1 of the silo, a dividing tray bracket rotating device 6 for driving the dividing tray bracket 5 to open and close is arranged on one side of the back side of the dividing tray bracket 5, and a reel blanking positioning device 7 for positioning the reel dropped onto the dividing tray bracket 5 is arranged in the middle of the back side of the dividing tray bracket 5.

[0032] Furthermore, the silo fixed bottom plate 1 is an annular structure or a C-shaped structure.

[0033] For further information, see Figure 3 As shown, the reel size switching module is composed of a first reel size switching cylinder 301, a second reel size switching cylinder 302, a reel limit block 303, a second reel size switching cylinder fixed block 304, a first linear guide rail 305, a second linear guide rail 306 and a reel disc module fixed block 307. The first reel size switching cylinder 301 is horizontally fixed on the upper surface of the silo fixed bottom plate 1, and the telescopic rod of the first reel size switching cylinder 301 is aligned with the center of the blanking circular hole 2. The reel limit block 303 is vertically arranged on the telescopic rod of the first reel size switching cylinder 301. The second reel size switching cylinder fixed block 304 is slidably arranged on the lower surface of the silo fixed bottom plate 1 through the first linear guide rail 305, and the movement direction of the second reel size switching cylinder fixed block 304 is the same as that of the first reel size switching cylinder 301. The movement direction of the reel disk module fixed block 307 is parallel up and down; the reel disk module fixed block 307 is slidably set on the lower surface of the second reel size switching cylinder fixed block 304 through the second linear slide rail 306, and the movement direction of the reel disk module fixed block 307 is parallel up and down to the movement direction of the second reel size switching cylinder fixed block 304, the front end of the reel disk module fixed block 307 is fixedly connected to the reel limit block 303, the second reel size switching cylinder 302 is set on the side surface of the second reel size switching cylinder fixed block 304, and the movement direction of the second reel size switching cylinder 302 is parallel up and down to the movement direction of the first reel size switching cylinder 301, and the telescopic rod of the second reel size switching cylinder 302 is fixedly connected to the side surface of the reel disk module fixed block 307 through the reel disk module fixed block connector 308.

[0034] For further information, see Figure 4As shown, the reel plate dividing module 4 is composed of a reel plate dividing cylinder 401, a reel plate dividing support block 402, a third linear slide rail 403 and a reel plate dividing support block fixing block 404. The reel plate dividing cylinder 401 is arranged on the side surface of the reel plate dividing module fixing block 307, and the movement direction of the reel plate dividing cylinder 401 is vertically parallel to the movement direction of the first reel size switching cylinder 301 and the second reel size switching cylinder 302. The reel plate dividing support block fixing block 404 is provided through the The third linear slide rail 403 is slidably arranged on the lower surface of the Reel disk partitioning module fixed block 307, and the movement direction of the Reel disk partitioning support block fixed block 404 is vertically parallel to the movement direction of the Reel disk partitioning module fixed block 307, the telescopic rod of the Reel disk partitioning cylinder 401 is fixedly connected to the side surface of the Reel disk partitioning support block fixed block 404 through the Reel disk partitioning support block fixed block connector 405, and the Reel disk partitioning support block 402 is arranged on the lower surface of the Reel disk partitioning support block fixed block 404.

[0035] Furthermore, the reel silo mechanism is suitable for reels with a size of 7 to 13 inches and a thickness of 8 to 24 mm.

[0036] Furthermore, the reel silo mechanism has a storage capacity of 30 reels.

[0037] For further information, see Figure 5 As shown, a pair of reel in-place sensors 8 for sensing whether a reel is present are symmetrically arranged on the left and right sides of the tray tray 5.

[0038] For further information, see Figure 5-6 As shown, the silo fixed bottom plate 1 and the plate-dividing bracket 5 are rotatably connected via a plate-dividing bracket fixing bracket 9 and a plate-dividing fixing connecting piece 10, the upper end of the plate-dividing bracket fixing bracket 9 is fixedly connected to the lower surface of the silo fixed bottom plate 1, one end of the plate-dividing fixing connecting piece 10 is fixedly connected to the lower surface of the plate-dividing bracket 5, and the other end of the plate-dividing fixing connecting piece 10 is hinged to the lower end of the plate-dividing bracket fixing bracket 9.

[0039] For further information, see Figure 5-6 As shown, the disc tray rotating device 6 includes a pen-shaped cylinder 601, the bottom end of the pen-shaped cylinder 601 is hinged to a pen-shaped cylinder fixing bracket 602 fixed under the disc tray 5, and the top end of the telescopic rod of the pen-shaped cylinder 601 is hinged to a pen-shaped cylinder connecting piece 603 fixed on the lower surface of the disc tray 5.

[0040] For further information, see Figure 5-6As shown, the reel blanking positioning device 7 includes a reel positioning cylinder 701, a reel positioning pin 702 is provided at the end of the telescopic rod of the reel positioning cylinder 701, a reel positioning hole 703 concentric with the blanking circular hole 2 is provided in the middle of the plate dividing bracket 5, the reel positioning cylinder 701 is installed on the back side of the plate dividing bracket 5 through a reel positioning cylinder fixing bracket 704, and the reel positioning pin 702 is aligned upward with the reel positioning hole 703; when the telescopic rod of the reel positioning cylinder 701 is extended, the reel positioning pin 702 extends upward from the reel positioning hole 703, and when the telescopic rod of the reel positioning cylinder 701 is retracted, the reel positioning pin 702 retreats downward into the reel positioning hole 703.

[0041] The working process of the present invention is as follows:

[0042] See also Figure 1-7 As shown, first, the size of the Reel is loaded according to the needs, and the extension length of each first Reel size switching cylinder 301 and the second Reel size switching cylinder 302 is adjusted at the same time, so that the silo surrounded by the three Reel limit blocks 303 is adjusted to a suitable caliber, and then the advancement distance of each Reel dividing cylinder 401 is set respectively, so as to ensure that the three Reel dividing support blocks 402 can simultaneously support the Reels on the second layer when extended, and finally, multiple Reels of the same size are stacked in the silo surrounded by the three Reel limit blocks 303. At this time, the Reel on the bottom layer is supported by the dividing tray bracket 5 that has not yet been opened.

[0043] After starting, first, the Reel positioning cylinder 701 drives the Reel positioning pin 702 to extend upward from the Reel positioning hole 703, and the Reel positioning pin 702 is inserted into the central hole of the Reel on the bottom layer to achieve positioning before dividing the disc. At the same time, the three Reel dividing disc cylinders 401 respectively drive the three Reel limit blocks 303 respectively set to advance inward, and at the same time support the Reel on the second layer to prevent the remaining Reels on the top from falling. Then the dividing disc bracket rotating device 6 drives the dividing disc bracket 5 to rotate downward, so that the dividing disc bracket 5 drives the Reel on the bottom layer to tilt downward by 45°. When the Reel in place sensors 8 on the left and right sides of the dividing disc bracket 5 sense the presence of Reel, the Reel positioning cylinder 701 drives the Reel positioning pin 702 to retract into the Reel positioning hole 703, so that the Reel on the dividing disc bracket 5 automatically slides down, thereby completing the feeding of a disc of Reel.

[0044] After a reel is fed, the tray-dividing bracket rotating device 6 drives the tray-dividing bracket 5 to rotate upward, so that the tray-dividing bracket 5 continues to cover the bottom of the round hole 2 of the fixed bottom plate 1 of the silo, and then the three reel-dividing cylinders 401 respectively drive the three reel limit blocks 303 to retract outward, so that the reels in the silo fall down together and the next reel is fed. This set of actions is repeated to realize the automatic feeding of reels of different specifications, and the number of reels in the silo can be increased or decreased at any time without stopping the machine.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Reel automatic feeding mechanism of an ARC automatic disc changer, characterized in that: The invention comprises a silo fixed bottom plate (1), wherein a circular hole (2) for reel separation is arranged at the center of the silo fixed bottom plate (1), and at least three groups of reel size switching modules (3) are arranged on the silo fixed bottom plate (1), and all the reel size switching modules are evenly distributed around the edge of the circular hole (2) and together form a reel silo mechanism with adjustable diameter; a reel separation module (4) is arranged at the bottom of each group of the reel size switching modules, and all the reel separation modules They are evenly distributed around the edge of the blanking circular hole (2) and together form a reel separation mechanism; a separation bracket (5) that can be opened and closed relative to the blanking circular hole (2) is arranged below the fixed bottom plate (1) of the silo, a separation bracket rotating device (6) for driving the separation bracket (5) to open and close is arranged on one side of the back of the separation bracket (5), and a reel blanking positioning device (7) for positioning a reel dropped onto the separation bracket (5) is arranged in the middle of the back of the separation bracket (5); The reel size switching module (3) is composed of a first reel size switching cylinder (301), a second reel size switching cylinder (302), a reel limit block (303), a second reel size switching cylinder fixing block (304), a first linear slide rail (305), a second linear slide rail (306) and a reel disk module fixing block (307), wherein the first reel size switching cylinder (301) is horizontally fixed on the upper surface of the silo fixed bottom plate (1), and the first reel The telescopic rod of the first reel size switching cylinder (301) is aligned with the center of the blanking circular hole (2), the reel limit block (303) is vertically arranged on the telescopic rod of the first reel size switching cylinder (301), the second reel size switching cylinder fixing block (304) is slidably arranged on the lower surface of the silo fixed bottom plate (1) through the first linear slide rail (305), and the movement direction of the second reel size switching cylinder fixing block (304) is the same as that of the first reel size switching cylinder ( The movement direction of the second reel size switching cylinder (301) is vertically parallel; the reel disc module fixing block (307) is slidably arranged on the lower surface of the second reel size switching cylinder fixing block (304) through the second linear slide rail (306), and the movement direction of the reel disc module fixing block (307) is vertically parallel to the movement direction of the second reel size switching cylinder fixing block (304); the front end of the reel disc module fixing block (307) is fixedly connected to the reel limit block (303); the second reel size switching cylinder (302) is arranged on the side surface of the second reel size switching cylinder fixing block (304), and the movement direction of the second reel size switching cylinder (302) is vertically parallel to the movement direction of the first reel size switching cylinder (301); the telescopic rod of the second reel size switching cylinder (302) is fixedly connected to the side surface of the reel disc module fixing block (307) through the reel disc module fixing block connecting piece (308); The reel plate dividing module (4) is composed of a reel plate dividing cylinder (401), a reel plate dividing support block (402), a third linear slide rail (403) and a reel plate dividing support block fixing block (404). The reel plate dividing cylinder (401) is arranged on the side surface of the reel plate dividing module fixing block (307), and the movement direction of the reel plate dividing cylinder (401) is vertically parallel to the movement direction of the first reel size switching cylinder (301) and the second reel size switching cylinder (302). The reel plate dividing support block fixing block (404) is connected to the reel plate dividing module by the third linear slide rail (403). The third linear slide rail (403) is slidably arranged on the lower surface of the reel disk module fixed block (307), and the movement direction of the reel disk module support block fixed block (404) is vertically parallel to the movement direction of the reel disk module fixed block (307), the telescopic rod of the reel disk cylinder (401) is fixedly connected to the side surface of the reel disk module support block fixed block (404) through the reel disk module support block fixed block connector (405), and the reel disk module support block (402) is arranged on the lower surface of the reel disk module support block fixed block (404); The silo fixed bottom plate (1) and the tray bracket (5) are rotatably connected via a tray bracket fixing bracket (9) and a tray fixing connecting piece (10); the upper end of the tray bracket fixing bracket (9) is fixedly connected to the lower surface of the silo fixed bottom plate (1); one end of the tray bracket fixing connecting piece (10) is fixedly connected to the lower surface of the tray bracket (5); and the other end of the tray bracket fixing connecting piece (10) is hinged to the lower end of the tray bracket fixing bracket (9); The tray-dividing bracket rotating device (6) comprises a pen-shaped cylinder (601), the bottom end of the pen-shaped cylinder (601) is hingedly connected to a pen-shaped cylinder fixing bracket (602) fixed below the tray-dividing bracket (5), and the top end of the telescopic rod of the pen-shaped cylinder (601) is hingedly connected to a pen-shaped cylinder connecting piece (603) fixed on the lower surface of the tray-dividing bracket (5); The reel blanking positioning device (7) comprises a reel positioning cylinder (701), a reel positioning pin (702) is arranged at the end of the telescopic rod of the reel positioning cylinder (701), a reel positioning hole (703) concentric with the blanking circular hole (2) is arranged in the middle of the tray-dividing bracket (5), the reel positioning cylinder (701) is mounted on the back side of the tray-dividing bracket (5) via a reel positioning cylinder fixing bracket (704), and the reel positioning pin (702) is aligned upward with the reel positioning hole (703); when the telescopic rod of the reel positioning cylinder (701) is extended, the reel positioning pin (702) extends upward from the reel positioning hole (703), and when the telescopic rod of the reel positioning cylinder (701) is retracted, the reel positioning pin (702) retracts downward into the reel positioning hole (703).

2. The automatic reel feeding mechanism of the ARC automatic disc changer according to claim 1, characterized in that: The silo fixed bottom plate (1) is in the form of a ring-shaped structure or a C-shaped structure.

3. The automatic reel feeding mechanism of the ARC automatic disc changer according to claim 1, characterized in that: The reel silo mechanism is suitable for reels with a size of 7 to 13 inches and a thickness of 8 to 24 mm.

4. The automatic reel feeding mechanism of the ARC automatic disc changer according to claim 1, characterized in that: The reel silo mechanism has a storage capacity of 30 reels.

5. The automatic reel feeding mechanism of the ARC automatic disc changer according to claim 1, characterized in that: A pair of reel in-position sensors (8) for sensing whether a reel is present are symmetrically arranged on the left and right sides of the reel distribution bracket (5).

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