Material box and automatic feeding device

Abstract

The present invention relates to a cartridge and an automatic feeding device for vertically placing a plurality of fixing pieces, where the fixing pieces are straight fixing pieces or bent fixing pieces, and the bent fixing pieces include a straight section and a bent section. It includes a bottom plate, on which a front limiting plate and a rear limiting plate are arranged at intervals along the width direction of the fixing piece, and a left limiting plate and a right limiting plate are arranged at intervals along the length direction of the fixing piece. The straight section is arranged on the bottom plate, and the bent section is arranged in suspension. There is a pushing opening between the front limiting plate and the bottom plate, and there is a discharging opening between the rear limiting plate and the bottom plate for only a single fixing piece to go out. The automatic feeding device includes the cartridge as described above; a driving mechanism is used to push out the lowermost fixing piece in the cartridge through the discharging opening; a receiving mechanism is used to receive the fixing piece pushed out from the discharging opening. The cartridge and the automatic feeding device of the present application have the advantages of reasonable and compact structural design, being able to automatically convey straight fixing pieces or bent fixing pieces, better cooperating with a numerical control nailer, and running safely and reliably, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of door and window processing equipment, and particularly relates to a material box and an automatic feeding device. Background Art

[0002] The fixing piece (also called connecting piece or mounting piece or connector) is one of the essential components in door and window installation, and mainly functions to fix the door and window on the wall. In order to improve the processing efficiency of doors and windows, it is generally necessary to install the fixing pieces on the door and window profiles in advance. In the past, the installation of fixing pieces mainly relied on manual labor. During installation, the installation position marks were made on the door and window profiles in advance, the fixing pieces were placed on the door and window profiles according to the marks, and then an electric screwdriver was used to drive the nails. This installation method not only has a high labor intensity, but also is time-consuming and laborious, seriously restricting the processing efficiency of doors and windows. To achieve high-efficiency and high-precision installation of fixing pieces, mechanized installation must be realized, and there are two main technical difficulties in realizing mechanized installation: one is to realize automatic nail driving; the other is to realize automatic feeding of fixing pieces. Among them, the automatic nail driving technology has developed relatively maturely. The existing numerical control nail driving machine can accurately run to the nail driving position, automatically feed the screws and automatically screw the screws, which can meet the processing requirements. However, how to realize the automatic feeding of fixing pieces has always troubled relevant researchers.

[0003] In order to realize the automatic feeding of fixing pieces, various attempts have been made in the prior art. However, there are always some unsatisfactory aspects. For example, Chinese Patent Application No.: CN201821050331.6 discloses a solution that uses the principle of magnets to directly and quickly install the fixing pieces on the nail driving mechanism, and then the numerical control nail driving machine drives the fixing pieces directly to drive nails on the door and window profiles, realizing semi-automatic feeding of the fixing pieces, but still requires manual feeding; another example is that the prior art discloses a mechanism that can realize automatic feeding along the length direction of the fixing piece (abbreviated as horizontal feeding mechanism). The specific structure is as Figure 11 shown. The horizontal feeding mechanism includes a horizontally arranged horizontal feeding channel. A horizontal feeding material box for placing the fixing pieces is arranged on the horizontal feeding channel. One side of the horizontal feeding material box along the length direction of the fixing piece is provided with a pushing port, and the other side is provided with a discharging port. The size of the discharging port can only allow one fixing piece to pass through. A horizontal feeding driving cylinder is arranged at one end of the pushing port. Although this horizontal feeding mechanism can realize the feeding of the fixing pieces, there are three relatively prominent problems: one is that it can only feed straight fixing pieces and cannot feed bent fixing pieces. The existing fixing pieces are divided into two types: straight fixing pieces and bent fixing pieces. As Figure 12 shown, a straight fixing piece means that the entire surface is flat; as Figure 13As shown in the figure, the bent fixing piece refers to a fixing piece that is bent at about 1 / 4 of its length to be divided into two parts: a straight segment and a bent segment. The length of the straight segment is greater than that of the bent segment. The surfaces of the straight segment and the bent segment are parallel but not in the same plane. The main function of the bent fixing piece is to facilitate the rotation of the fixing piece during installation for installation. Therefore, the bent fixing piece is more widely used. Second, due to the use of horizontal transportation, the entire structure has an excessively long horizontal length, which is very inconvenient to use and the structure is not compact enough. Third, due to the long horizontal transportation distance and the long length of the pushing plate, it is prone to deformation after long-term use, ultimately leading to jamming and even the problem of the fixing piece popping out. By analyzing the existing improvement solutions, it can be seen that there is no mature solution in the prior art to achieve automatic feeding of the fixing piece. Therefore, it is necessary to design a new automatic feeding device that can not only achieve automatic feeding of the straight fixing piece but also automatic feeding of the bent fixing piece, and at the same time, the structure design is more reasonable and compact.

[0004] It should be noted that the above content belongs to the technical cognitive scope of the inventor and does not necessarily constitute the prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and provide a material box and an automatic feeding device, which have the advantages of reasonable and compact structure design, can automatically transport straight fixing pieces or bent fixing pieces, cooperate better with the numerical control nail gun, and operate safely and reliably.

[0006] The present invention realizes the above purpose by adopting the following technical solutions:

[0007] A material box for vertically placing a plurality of fixing pieces, the fixing pieces being straight fixing pieces or bent fixing pieces. The bent fixing piece includes a straight segment and a bent segment. It includes a bottom plate. Along the width direction of the fixing piece, a front limiting plate and a rear limiting plate are spaced on the bottom plate. Along the length direction of the fixing piece, a left limiting plate and a right limiting plate are spaced on the bottom plate. A part of the fixing piece is arranged on the bottom plate and another part is arranged in a suspended state. Correspondingly, a part of the straight fixing piece is arranged on the bottom plate and another part is arranged in a suspended state. The straight segment of the bent fixing piece is arranged on the bottom plate and the bent segment is arranged in a suspended state. A pushing opening is arranged between the front limiting plate and the bottom plate, and a discharging opening for only a single fixing piece to go out is arranged between the rear limiting plate and the bottom plate.

[0008] The left limiting plate is arranged between the front limiting plate and the rear limiting plate. The right limiting plate is spaced at the right end of the bottom plate, and the distance between the right limiting plate and the bottom plate is greater than or equal to the length of the bent segment. A connecting plate is arranged on the front side wall of the right limiting plate, and the connecting plate is installed on the front limiting plate. The bent segment is arranged between the right limiting plate and the bottom plate.

[0009] On the left side of the front limit plate, there is a left adjustment hole for adjusting the position of the left limit plate. A fastening screw A connected to the left limit plate is provided on the left adjustment hole. On the connecting plate, there is a right adjustment hole for adjusting the distance between the right limit plate and the bottom plate. A fastening screw B connected to the front limit plate is provided on the right adjustment hole.

[0010] The left and right ends of the bottom plate, the front limit plate and the rear limit plate are aligned.

[0011] An automatic feeding device, comprising:

[0012] The cartridge as described above;

[0013] A driving mechanism for pushing out the lowermost fixing piece in the cartridge through the discharge port;

[0014] A receiving mechanism for receiving the fixing piece pushed out from the discharge port.

[0015] An avoidance mechanism is provided on the cartridge. The avoidance mechanism includes a base. The base is arranged on the nail driving lifting table. A slider is vertically arranged on the base. A slide rail is vertically arranged on the slider. The slide rail is installed on the rear limit plate. The receiving mechanism is arranged below the nail driving lifting table.

[0016] A nail driving lifting table is vertically provided with an avoidance driving bracket. An avoidance driving cylinder is provided on the avoidance driving bracket. The avoidance driving cylinder is connected to the cartridge.

[0017] The driving mechanism includes a bracket installed on the cartridge. A driving cylinder is provided on the bracket. The driving cylinder is connected with a pushing plate. The pushing plate is matched with the pushing port.

[0018] The front end of the bottom plate extends beyond the front limit plate to guide the pushing plate.

[0019] The receiving mechanism includes a magnetic base. A magnet for adsorbing the fixing piece is provided below the magnetic base.

[0020] A limit plate is provided below one end of the magnetic base away from the cartridge. The magnetic base is of an L-shaped structure.

[0021] The rear end of the bottom plate extends beyond the rear limit plate. A guiding limit block is provided on the rear limit plate. The lower end of the guiding limit block is aligned with the upper end of the discharge port. The guiding limit block and the bottom plate cooperate to form a guiding channel. The guiding limit block and the avoidance mechanism cooperate for avoidance and limitation.

[0022] The present invention adopts the above technical solutions and can bring the following beneficial effects: (1) By designing a new cartridge structure, the suspended design of the bent section of the bent fixing piece can be realized, and then the straight section can be used for conveying. This structural design can not only realize the conveying of straight fixing pieces or bent fixing pieces, but also realize the longitudinal conveying, with the advantage of compact structure; (2) By designing the left limiting plate and the right limiting plate into an adjustable structural form, the applicable range of the present application is further broadened, and the automatic conveying requirements of various types of fixing pieces can be met; (3) Based on the cartridge structure, an automatic feeding device is designed to realize automatic feeding without manual labor, and the feeding accuracy and efficiency are greatly improved; (4) By designing an avoidance mechanism, the problem that the cartridge cannot avoid due to the concave and convex grooves of the door and window profiles is well solved. The avoidance mechanism of the present application can rely on the existing numerical control nail gun and its own gravity to realize avoidance, or a driving mechanism can be designed separately to realize avoidance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural view of the cartridge of the present invention;

[0024] Figure 2 It is a schematic structural view of the cartridge of the present invention from another perspective;

[0025] Figure 3 It is a schematic structural view of the bent fixing piece placed on the cartridge of the present invention;

[0026] Figure 4 It is a schematic structural view of the cartridge of the present invention in which the rear limiting plate and the bottom plate are not aligned;

[0027] Figure 5 It is a schematic structural view of the automatic feeding device of the present invention;

[0028] Figure 6 It is a schematic structural view of the automatic feeding device of the present invention from another perspective;

[0029] Figure 7 It is a schematic structural view of the automatic feeding device of the present invention with an avoidance driving cylinder installed;

[0030] Figure 8 It is a schematic structural view of the automatic feeding device of the present invention before nailing;

[0031] Figure 9 It is a schematic avoidance structural view of the automatic feeding device of the present invention when nailing;

[0032] Figure 10 It is a schematic structural view of the automatic feeding device of the present invention with a screw clamping head installed;

[0033] Figure 11 It is a schematic structural principle view of the existing horizontal feeding mechanism;

[0034] Figure 12 It is a schematic structural diagram of an existing straight fixing piece;

[0035] Figure 13 It is a schematic structural diagram of an existing bent fixing piece;

[0036] In the figure, 1 is a material box, 101 is a bottom plate, 102 is a front limit plate, 103 is a rear limit plate, 104 is a left limit plate, 105 is a right limit plate, 106 is a material pushing port, 107 is a discharge port, 108 is a connecting plate, 109 is a left adjustment hole, 110 is a fastening screw A, 111 is a right adjustment hole, 112 is a fastening screw B, 2 is a driving mechanism, 201 is a bracket, 202 is a driving cylinder, 203 is a material pushing plate, 3 is a material receiving mechanism, 301 is a magnetic base, 302 is a magnet, 303 is a limit plate, 4 is an avoidance mechanism, 401 is a base, 402 is a slider, 403 is a slide rail, 404 is an avoidance driving bracket, 405 is an avoidance driving cylinder, 5 is a nail driving lifting table, 6 is a guiding limit block, 7 is a guiding channel, 8 is a straight fixing piece, 9 is a bent fixing piece, 901 is a straight section, 902 is a bent section, 10 is a nail driving hole, 11 is a door and window profile, 12 is a screw clamping head, 13 is a drill bit, 14 is a screw conveying pipe, 15 is a transverse material feeding mechanism, 1501 is a transverse material feeding channel, 1502 is a transverse material feeding box, 1503 is a transverse material feeding driving cylinder, 1504 is a transverse material feeding pushing plate. Specific embodiments

[0037] In order to more clearly illustrate the overall concept of the present invention, the following will be described in detail by way of examples in combination with the accompanying drawings of the specification.

[0038] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0039] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0040] In the present invention, the terms "front", "rear", "left", "right", "A", "B", "end" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the position of the indicated technical features.

[0041] In the present invention, unless otherwise clearly defined and limited, terms such as "provided with", "set", "connected", "communicated" shall be understood in a broad sense. For example, "provided with" and "set" can be fixedly installed, detachably installed, or integrated; "connected" can be directly connected or connected through an intermediate medium. "Communicated" mainly refers to the communication of the gas path in this application. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] As Figures 1 - 10 shown, the cartridge 1 is used for vertically placing a plurality of fixing pieces. The fixing pieces are straight fixing pieces 8 or bent fixing pieces 9. The bent fixing piece 9 includes a straight section 901 and a bent section 902, and includes a bottom plate 101. Along the width direction of the fixing piece, a front limiting plate 102 and a rear limiting plate 103 are spaced on the bottom plate 101. Along the length direction of the fixing piece, a left limiting plate 104 and a right limiting plate 105 are spaced on the bottom plate 101. Along the length direction of the fixing piece, a part of the fixing piece is arranged on the bottom plate 101, and the other part is arranged in a suspended manner. Correspondingly, a part of the straight fixing piece 8 is arranged on the bottom plate 101, and the other part is arranged in a suspended manner. The straight section 901 of the bent fixing piece 9 is arranged on the bottom plate 101, and the bent section 902 is arranged in a suspended manner. A material pushing port 106 is arranged between the front limiting plate 102 and the bottom plate 101, and a discharge port 107 for only a single fixing piece to go out is arranged between the rear limiting plate 103 and the bottom plate 101. By designing a new structure of the cartridge 1, the suspended design of the bent section 902 of the bent fixing piece 9 can be realized, and then the straight section 901 can be used for conveying. This structural design can not only realize the longitudinal conveying of the straight fixing piece or the bent fixing piece, but also has the advantage of compact structure. The traditional transverse feeding mechanism 15 includes a transverse feeding channel 1501, a transverse feeding cartridge 1502, a transverse feeding driving cylinder 1503 and a transverse feeding pushing plate 1504. The traditional transverse feeding mechanism 15 can only realize the transverse conveying of the straight fixing piece 8, and the transverse distance is too long, which is very inconvenient to use. Compared with the traditional transverse feeding mechanism 15, the advantages of the cartridge structure of this application are particularly prominent.

[0043] The left limiting plate 104 is arranged between the front limiting plate 102 and the rear limiting plate 103. The right limiting plate 105 is spaced at the right end of the bottom plate 101, and the distance between the right limiting plate 105 and the bottom plate 104 is greater than or equal to the length of the bent section 902. A connecting plate 108 is arranged on the front side wall of the right limiting plate 105, and the connecting plate 108 is installed on the front limiting plate 102. The bent section 902 is arranged between the right limiting plate 105 and the bottom plate 101.

[0044] On the left side of the front limit plate 102, there is a left adjustment hole 109 for adjusting the position of the left limit plate 104. A fastening screw A 110 connected to the left limit plate 104 is provided on the left adjustment hole 109. On the connecting plate 108, there is a right adjustment hole 111 for adjusting the distance between the right limit plate 105 and the bottom plate 101. A fastening screw B 112 connected to the front limit plate 102 is provided on the right adjustment hole 111. By designing the left limit plate 104 and the right limit plate 105 into an adjustable structural form, the applicable range of this application is further broadened, and the automatic conveying requirements of various types of fixing pieces can be met.

[0045] The left and right ends of the bottom plate 101, the front limit plate 102, and the rear limit plate 103 are aligned. The overall structure design is more compact, and it is more conducive to adjusting the distance between the right limit plate 105 and the bottom plate 101.

[0046] An automatic feeding device, comprising:

[0047] The cartridge 1 as described above;

[0048] A driving mechanism 2 for pushing the lowermost fixing piece in the cartridge 1 out through the discharge port 107;

[0049] A receiving mechanism 3 for receiving the fixing piece pushed out from the discharge port 107. Based on the structure design of the cartridge 1, an automatic feeding device is realized, which realizes automatic feeding without manual labor, and greatly improves the feeding accuracy and efficiency.

[0050] The cartridge 1 is provided with an avoidance mechanism 4. The avoidance mechanism 4 includes a base 401. The base 401 is arranged on the nail driving lifting table 5. A slider 402 is vertically provided on the base 401. A slide rail 403 is vertically provided on the slider 402. The slide rail 403 is installed on the rear limit plate 103. The receiving mechanism 3 is provided below the nail driving lifting table 5. By designing the avoidance mechanism 4, the problem that the cartridge 1 cannot avoid due to the concave and convex grooves of the door and window profiles 11 is well solved. The avoidance mechanism 4 of this application can realize avoidance both by relying on the existing numerical control nail driving machine and the self-gravity of the cartridge 1, and can also be designed with a separate driving mechanism for avoidance. The nail driving lifting table 5 in this application is a structure on the existing numerical control nail driving machine, and its main function is to install the screw clamping head 12 (also called the machine head) and drive the screw clamping head 12 to move up and down. The screw clamping head 12 is connected to the automatic nail feeding mechanism through a screw delivery pipe 14, and a drill bit 13 for screwing is also provided on the screw clamping head 12.

[0051] The nailing lifting platform 5 is vertically provided with an avoidance driving bracket 404, and the avoidance driving bracket 404 is provided with an avoidance driving cylinder 405, and the avoidance driving cylinder 405 is connected to the material box 1. Here, the avoidance driving cylinder 405 is adopted to realize the lifting of the material box 1, thereby realizing active avoidance of the door and window profile 11 during nailing.

[0052] The driving mechanism 2 includes a bracket 201 mounted on the material box 1, a driving cylinder 202 is provided on the bracket 201, and the driving cylinder 202 is connected to a push plate 203, and the push plate 203 cooperates with the push port 106. The driving cylinder 202 is used to push the bottom fixed sheet in the material box 1 longitudinally to realize feeding.

[0053] The front end of the bottom plate 101 exceeds the front limit plate 102 and is used to guide the push plate 203 .

[0054] The receiving mechanism 3 includes a magnetic base 301, and a magnet 302 for adsorbing the fixing plate is provided below the magnetic base 301. Here, the function of the magnet 302 is fully utilized to adsorb the fixing plate, and when the fixing plate is adsorbed below the magnet 302, the nailing hole 10 on the fixing plate is aligned with the screw outlet on the screw clamping head 12, and then the automatic screw feeding mechanism feeds the screw into the screw outlet, and the front end of the screw falls into the nailing hole 10, ready for nailing.

[0055] A limit plate 303 is provided below one end of the magnetic base 301 away from the material box 1, and the magnetic base 301 is an L-shaped structure. The limit plate 303 can ensure that the fixed plate is accurately positioned below the magnet 302, thereby ensuring that the nail hole 10 is aligned with the screw clamping head 12.

[0056] The rear end of the bottom plate 101 exceeds the rear limit plate 103, and the rear limit plate 103 is provided with a guide limit block 6, the lower end of the guide limit block 6 is aligned with the upper end of the discharge port 107, and the guide limit block 6 cooperates with the bottom plate 101 to form a guide channel 7, and the guide limit block 6 cooperates with the avoidance mechanism 4 for avoidance limit. Here, the functions of the bottom plate 101 and the guide limit block 6 are fully utilized to achieve the guidance of the fixed plate after it comes out of the discharge port 107, and at the same time, the inertia of the fixed plate and the function of the magnet 302 are used to accurately adsorb the fixed plate on the magnet 302.

[0057] The working process of the automatic feeding device of the present invention:

[0058] Taking the structure of the non-avoidance driving cylinder 405 as an example, when in use, first install the base 401 and the material receiving mechanism 3 on the nailing lifting platform 5 (the structure on the existing CNC nailing machine), and then the lower end of the slide rail 403 contacts the nailing lifting platform 5 for limiting. At this time, the lower end of the magnet 302 is aligned with the lower end of the guide limit block 6, and then the bent fixing plate 9 is installed in the material box 1, and the bent section 902 is aligned with the right limit plate 105. Before nailing, start the driving cylinder 202 first. The driving cylinder 202 pushes the lowermost bent fixing sheet 9 in the material box 1 (the straight section 901 of the bent fixing sheet 9 is pushed when pushing) out of the discharge port 107 through the pushing plate 203. After the bent fixing sheet 9 comes out of the discharge port 107, it continues to move forward under the action of the guide channel 7, and then the running inertia and the adsorption force of the magnet 302 are used to accurately adsorb the bent fixing sheet 9 under the magnet 302, and the nailing hole 10 of the bent fixing sheet 9 is aligned with the screw outlet of the screw clamping head 15. After the bent fixing sheet 9 is delivered to the position, the driving cylinder 202 is reset to wait for the next feeding, and then the automatic screw feeding mechanism (provided on the CNC nailing machine) feeds the screw into the screw outlet, and then the front end of the screw enters the nailing hole 10, thereby completing the efficient and accurate longitudinal feeding of the bent fixing sheet 9, and then CNC nailing. The machine moves according to the nailing position to reach the specified nailing position. When nailing, the nailing lifting platform 5 descends. During the descending process, the bottom plate 101 of the material box 1 first contacts the raised part of the door and window profile 11. Under the action of the raised part of the door and window profile 15, the material box 1 moves upward along the slider 402 to achieve avoidance until the bent fixing piece 9 contacts the groove of the door and window profile 11, and then the nailing mechanism performs nailing, thereby fastening the bent fixing piece 9 and the door and window profile 11 (the door and window profile 11 is fastened to the workbench through a cylinder) together. After the nailing is completed, the nailing lifting platform 5 rises, and the bent fixing piece 9 overcomes the magnetic force and remains on the door and window profile 11. At the same time, the material box 1 slides down along the slider 402 under the action of its own gravity until it returns to its initial state. Repeating the above steps can achieve continuous, efficient and high-precision installation of the bent fixing piece 9. Of course, the automatic feeding device of the present application can also nail the straight fixing piece 8. When installing, you only need to align one end of the straight fixing piece 8 with the right limit plate 105. The other installation processes are the same as those of the curved fixing piece 9. Of course, the material box and automatic feeding device of the present application can also be used on ordinary nailing machines, and the overall advantages of using them on CNC nailing machines are more obvious. The material box and automatic feeding mechanism of the present application have the advantages of reasonable and compact structural design, automatic conveying of straight fixing pieces or curved fixing pieces, better coordination with CNC nailing machines, safe and reliable operation, etc. The advantages are more obvious when installing the curved fixing piece 9.

[0059] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0060] Matters not described in detail in the present invention are well-known techniques to those skilled in the art.

Claims

1. Material box, characterized in that: For vertically placing a plurality of fixing pieces, the fixing pieces are straight fixing pieces or bent fixing pieces, the bent fixing pieces include a straight segment and a bent segment, and a bottom plate is included. Along the width direction of the fixing piece, a front limiting plate and a rear limiting plate are arranged on the bottom plate at intervals. Along the length direction of the fixing piece, a left limiting plate and a right limiting plate are arranged on the bottom plate at intervals. A part of the fixing piece is arranged on the bottom plate, and the other part is arranged in a suspended manner. Correspondingly, a part of the straight fixing piece is arranged on the bottom plate, and the other part is arranged in a suspended manner. The straight segment of the bent fixing piece is arranged on the bottom plate, and the bent segment is arranged in a suspended manner. A material pushing port is arranged between the front limiting plate and the bottom plate, and a discharge port for only a single fixing piece to go out is arranged between the rear limiting plate and the bottom plate.

2. The material box according to claim 1, characterized in that: The left limiting plate is arranged between the front limiting plate and the rear limiting plate, the right limiting plate is arranged at intervals at the right end of the bottom plate, and the distance between the right limiting plate and the bottom plate is greater than or equal to the length of the bent segment. A connecting plate is arranged on the front side wall of the right limiting plate, and the connecting plate is installed on the front limiting plate. The bent segment is arranged between the right limiting plate and the bottom plate.

3. The material box according to claim 2, characterized in that: On the left side of the front limiting plate, a left adjusting hole for adjusting the position of the left limiting plate is arranged, and a fastening screw A connected to the left limiting plate is arranged on the left adjusting hole. On the connecting plate, a right adjusting hole for adjusting the distance between the right limiting plate and the bottom plate is arranged, and a fastening screw B connected to the front limiting plate is arranged on the right adjusting hole.

4. The material box according to claim 2 or 3, characterized in that: The left and right ends of the bottom plate, the front limiting plate and the rear limiting plate are aligned.

5. Automatic feeding device, characterized in that, Comprising: The material box according to any one of claims 1-4; A driving mechanism for pushing out the lowermost fixing piece in the material box through the discharge port; A material receiving mechanism for receiving the fixing piece pushed out from the discharge port; An avoidance mechanism is arranged on the material box. The avoidance mechanism includes a base. The base is arranged on a nail driving lifting table. A slider is arranged vertically on the base. A slide rail is arranged vertically on the slider. The slide rail is installed on the rear limiting plate. The material receiving mechanism is arranged below the nail driving lifting table.

6. The automatic feeding device according to claim 5, characterized in that: A vertically arranged avoidance driving bracket is arranged on the nail driving lifting table. An avoidance driving cylinder is arranged on the avoidance driving bracket. The avoidance driving cylinder is connected to the material box.

7. The automatic feeding device according to claim 6, characterized in that: The driving mechanism includes a bracket installed on the material box. A driving cylinder is arranged on the bracket. The driving cylinder is connected with a material pushing plate. The material pushing plate is matched with the material pushing port.

8. The automatic feeding device according to claim 7, characterized in that: The front end of the bottom plate extends beyond the front limiting plate for guiding the material pushing plate.

9. The automatic feeding device according to claim 8, characterized in that: The material receiving mechanism includes a magnetic base. A magnet for adsorbing the fixing piece is arranged below the magnetic base. A limiting plate is arranged below one end of the magnetic base far away from the material box. The magnetic base is of an L-shaped structure.

10. The automatic feeding device according to claim 9, characterized in that: The rear end of the bottom plate extends beyond the rear limiting plate. A guiding and limiting block is arranged on the rear limiting plate. The lower end of the guiding and limiting block is aligned with the upper end of the discharge port. The guiding and limiting block and the bottom plate cooperate to form a guiding channel. The guiding and limiting block and the avoidance mechanism cooperate for avoidance and limiting.

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