Pipe conveying equipment

Abstract

The invention relates to pipe conveying equipment which comprises a conveying frame and a counting sensor, a charging box is arranged at the feeding end of the conveying frame, a conveying assembly for conveying pipes is arranged on the conveying frame, a pushing frame is arranged on the conveying frame, a pushing piece for pushing the pipes is arranged on the pushing frame, and a fixing base is arranged on the pushing frame; a lifting seat is vertically and slidably matched with the fixing seat, the counting sensor is mounted on the lifting seat, a controller is arranged on the conveying frame, a control assembly is arranged on the pushing frame and comprises a rotating frame, a connecting plate and a limiting piece, the rotating frame comprises an abutting portion and a lifting portion, the abutting portion is rotatably connected to the pushing frame, the lifting portion is connected to one end of the abutting portion, and the limiting piece is arranged on the connecting plate. The connecting plate is connected to the lifting seat, the lifting part is in sliding fit with the connecting plate, and the limiting piece is connected to the fixed seat and used for limiting the initial position of the lifting seat. According to the invention, a specific sensing distance between the counting sensor and the pipe can be ensured, and the damage possibility of the counting sensor is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pipe transportation, and in particular to a pipe transportation device. Background Art

[0002] In order to facilitate the sorting and transportation of finished pipes, batches of pipes need to be transported to designated racks one by one according to a certain number. In order to improve the efficiency of pipe transportation and meet the conditions of counting the number of pipes and transporting them one by one, a pipe conveying equipment is required.

[0003] In the prior art, counting sensors are commonly used at the discharge port of the conveying equipment to count the moving pipes. However, in order to ensure the effective statistics of the counting sensor, the distance between the sensing end of the counting sensor and the moving pipe cannot be too far. However, the pipe cannot be completely guaranteed to move in a state throughout the transportation process. If the end of the pipe is lifted, the pipe is easy to hit the counting sensor, causing damage to the counting sensor.

[0004] Application Contents In order to solve the above-mentioned defects, the present application provides a pipe conveying equipment.

[0005] The present application provides a pipe conveying equipment adopting the following technical solution: A pipe conveying device comprises a conveying frame and a counting sensor, wherein a loading box is arranged at the feeding end of the conveying frame, a conveying assembly for conveying pipes is arranged on the conveying frame, a pushing frame is arranged at the discharging end of the conveying frame, a pushing groove is arranged on the pushing frame, a pushing piece for pushing pipes is arranged on the pushing frame, a fixed seat is arranged on the pushing frame, a lifting seat is vertically slidably matched on the fixed seat, the counting sensor is mounted on the lifting seat, a controller is arranged on the conveying frame, the counting sensor is electrically connected to the controller, a control assembly is arranged on the pushing frame, and the control assembly comprises A rotating frame, a connecting plate and a limiting member, wherein the rotating frame comprises a resisting portion and a lifting portion, one end of the resisting portion is rotatably connected to the pushing frame, the other end of the resisting portion is located below the counting sensor and is arranged obliquely, the reference direction from the counting sensor to the pushing member, the height of the resisting portion gradually increases, the lifting portion is connected to one end of the resisting portion and is arranged on the same side as the resisting portion, the connecting plate is connected to the lifting seat, the lifting portion is slidably fitted on the connecting plate, the limiting member is connected to the fixed seat, and the limiting member is used to limit the initial position of the lifting seat.

[0006] By adopting the above technical solution, during transportation, the pipe falls from the loading box to the conveying rack, the pipe is moved by the conveying assembly, the pipe falls into the pushing groove, and the pushing member is used to push the pipe to move. In this process, the pipe pushes the resistance part to rotate, causing the lifting part to rotate, and the connection plate rises, driving the lifting seat to rise, thereby causing the counting sensor to rise. The sensing end of the counting sensor detects the passage of the pipe and sends an electrical signal to the controller, so that the control system records the number of pipes, achieving the effect of conveying and counting the pipes. By setting a rotating rack, when pipes of different diameters pass by, the counting sensor always keeps a certain distance from the pipe, ensuring that the counting sensor can accurately sense the pipe, avoiding the occurrence of the phenomenon that the end of the pipe is lifted up and hits the counting sensor during transportation.

[0007] Optionally, a sliding seat is slidably matched on the connecting plate, and the lifting part is rotatably connected to the sliding seat.

[0008] By adopting the above technical solution and arranging the sliding seat, the sliding and rotating cooperation between the lifting part and the connecting plate is achieved, so that the lifting seat can be lifted and lowered smoothly.

[0009] Optionally, the limiting member is a limiting column, the limiting member is connected to the fixing seat and is located below the lifting seat, and in the initial position, the lifting seat abuts against the limiting member.

[0010] By adopting the above technical solution, at the initial position, the lifting seat descends due to gravity and contacts the limiting member, thereby limiting the initial position of the lifting seat. At the same time, the initial angle of the rotating frame is also limited by the sliding seat.

[0011] Optionally, a mounting column is connected to the connecting plate, a pressure spring is connected between the mounting column and the fixing seat, and a rubber pad is sleeved on the limiting member.

[0012] By adopting the above technical solution, by arranging the pressure spring and the rubber pad, the rise and fall of the lifting seat will be buffered, especially the impact of the lifting seat on the rubber pad, thereby reducing the impact of vibration on the counting sensor.

[0013] Optionally, the conveying assembly includes a conveying motor, a conveying roller and a conveying belt, wherein the conveying roller is rotatably connected to the feed end and the discharge end of the conveying frame, the conveying belt is sleeved between two of the conveying rollers, the conveying belt fits the surface of the conveying frame, the conveying motor is installed on the conveying frame and is coaxially connected to one of the conveying rollers, and the conveying motor is electrically connected to the controller.

[0014] By adopting the above technical solution, when conveying pipes, the conveying motor is started by the controller to rotate the conveying roller, drive the conveyor belt to move, and move the pipes, thereby achieving the effect of conveying the pipes.

[0015] Optionally, a plurality of limiting strips are connected to the conveyor belt, and the limiting strips are evenly distributed along the circumference of the conveyor belt. During transportation, the pipe is located between two adjacent limiting strips.

[0016] By adopting the above technical solution, the limiting strip is used to limit the position of the pipe, thereby reducing the possibility of the pipe being offset during transportation, and allowing the pipe to smoothly enter the pushing groove.

[0017] Optionally, a plurality of partitions are connected to the loading box, and the loading box is divided into a plurality of feeding channels by the plurality of partitions, wherein a discharge port is provided at the bottom end of one of the feeding channels, and a limiting component is provided on the loading box to block the movement of pipes in other feeding channels.

[0018] By adopting the above technical solution and providing a plurality of feeding channels and limiting components, the pipes are divided into a plurality of groups and fall in sequence, thereby ensuring that the pipes are transported one by one.

[0019] Optionally, the limiting assembly includes a counterweight block, a pressure plate, a baffle, a locking frame, a lifting frame and a traction spring; a discharge port and a sliding groove are provided at the bottom end of the partition; the baffle vertically slides and fits in the sliding groove; both ends of the baffle are connected to connecting blocks; a limiting groove is provided on the charging box; the connecting block slides and fits in the limiting groove; a fixed block is connected to the side wall of the charging box; the fixed block is located above the connecting block; the traction spring is connected between the fixed block and the connecting block; the locking frame slides horizontally and fits on the side wall of the charging box; the lifting frame slides vertically Fitted on the side wall of the charging box, the lifting frame is connected with a guide part, the locking frame is provided with a guide groove, the guide part slides and fits in the guide groove, the pressure plate slides and fits in each of the feeding channels, the counterweight block is connected to the pressure plate, both ends of the pressure plate are connected with a resistance flange, in the initial position, the baffle covers the discharge port, the locking frame resists the top of the connecting block, the traction spring is in a stretched state, when opened, the resistance flange presses the lifting frame, the locking frame disengages from the moving path of the connecting block, and the baffle is located in the sliding groove.

[0020] By adopting the above technical solution, during feeding, the pipes in the feeding channel provided with the discharge port fall down in sequence through the moving conveyor belt, and the pressure plate descends as the number of pipes decreases until it contacts the flange to apply pressure to the lifting frame, causing the lifting frame to descend, and the locking frame moves toward the lifting frame position through the cooperation of the guide part and the guide groove to disengage from the moving path of the connecting block. At this time, the connecting block rises due to the traction spring force, driving the baffle to rise, and the baffle enters the sliding groove to open the discharge port. At this time, the pipes in the adjacent feeding channels pass through the discharge port and are discharged one by one, and so on, the pipes in the remaining feeding channels fall onto the conveyor belt in sequence, thereby achieving the effect of conveying the pipes one by one.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. During transportation, the pipe falls from the loading box to the conveying rack, and the pipe is moved by the conveying assembly. The pipe falls into the pushing groove, and the pushing piece is used to push the pipe to move. In this process, the pipe pushes the resistance part to rotate, causing the lifting part to rotate, and the connecting plate rises, driving the lifting seat to rise, thereby causing the counting sensor to rise. The sensing end of the counting sensor detects the passage of the pipe and sends an electrical signal to the controller, so that the control system records the number of pipes, achieving the effect of conveying and counting the pipes. By setting up a rotating rack, when pipes of different diameters pass by, the counting sensor always maintains a certain distance from the pipe, ensuring that the counting sensor can accurately sense the pipe, avoiding the phenomenon of the end of the pipe rising and hitting the counting sensor during transportation; 2. During feeding, the pipes in the feeding channel provided with the discharge port fall down in sequence through the moving conveyor belt, and the pressure plate descends as the number of pipes decreases until it contacts the flange to apply pressure to the lifting frame, causing the lifting frame to descend, and the locking frame moves toward the lifting frame position through the cooperation of the guide part and the guide groove to disengage from the moving path of the connecting block. At this time, the connecting block rises due to the traction spring force, driving the baffle to rise, and the baffle enters the sliding groove to open the discharge port. At this time, the pipes in the adjacent feeding channels pass through the discharge port and are discharged one by one, and so on, the pipes in the remaining feeding channels fall on the conveyor belt in sequence, achieving the effect of conveying the pipes one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the pipe conveying equipment in the embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the structure of the charging box in the embodiment of the present application.

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 It is a diagram of the open state of the restriction component in the embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the structure of the push rack in the embodiment of the present application.

[0027] Figure 6 It is a cross-sectional view used to reflect the structure of the control component in the embodiment of the present application.

[0028] Description of reference numerals: 1, conveying frame; 11, controller; 2, counting sensor; 21, lifting seat; 3, conveying assembly; 31, conveying motor; 32, conveying roller; 33, conveying belt; 331, limiting strip; 4, charging box; 41, partition; 411, discharge port; 412, sliding groove; 42, feeding channel; 43, discharge port; 5, limiting assembly; 51, counterweight block; 52, pressing plate; 521, abutting flange; 53 , baffle; 531, connecting block; 54, locking frame; 541, guide groove; 55, lifting frame; 551, guide part; 56, traction spring; 6, pushing frame; 61, pushing groove; 62, pushing member; 63, fixed seat; 7, control component; 71, rotating frame; 711, interference part; 712, lifting part; 7121, sliding seat; 72, connecting plate; 721, pressure spring; 73, limiting member; 731, rubber pad. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 6 This application is described in further detail.

[0030] The present application embodiment discloses a pipe conveying device. Figure 1 The pipe conveying equipment includes a conveying frame 1. The conveying frame 1 is provided with a conveying assembly 3 and a controller 11. The conveying assembly 3 includes a conveying motor 31, a conveying roller 32 and a conveying belt 33. The conveying roller 32 is rotatably connected to each other at the feeding end and the discharging end of the conveying frame 1. The conveying belt 33 is sleeved between the two conveying rollers 32. The surface of the conveying belt 33 is fixedly connected with a plurality of limiting strips 331 along the circumference direction thereof. The plurality of limiting strips 331 are evenly distributed and arranged. The limiting strips 331 are used to limit the position of the pipe. The conveying motor 31 is installed on the conveying frame 1 and is coaxially connected to the conveying roller 32 near the feeding end. The conveying motor 31 is electrically connected to the controller 11.

[0031] When conveying pipes, the conveying motor 31 is started to rotate the conveying roller 32 and move the conveying belt 33 , so as to convey the pipes one by one through the limiting strip 331 .

[0032] Reference Figure 1 and Figure 2A loading box 4 is installed on the conveying frame 1 near the feed end. The top of the loading box 4 is opened. A plurality of partitions 41 are vertically fixedly connected to the loading box 4. In this embodiment, two partitions are taken as an example. Three feeding channels 42 are formed between the inner wall of the loading box 4 and the two partitions 41. A discharge port 43 is provided at the bottom of the feeding channel 42 away from the feed end.

[0033] Reference Figure 2 , Figure 3 and Figure 4 A limiting assembly 5 is provided between the loading box 4 and the partition 41, and the limiting assembly 5 includes a counterweight 51, a pressure plate 52, a baffle 53, a locking frame 54, a lifting frame 55 and a traction spring 56. A discharge port 411 and a sliding groove 412 are provided at the bottom end of the partition 41, and the baffle 53 is slidably fitted in the sliding groove 412. Both ends of the baffle 53 are fixedly connected with a connecting port, and a limiting groove is provided at the loading box 4 corresponding to the connecting block 531, and the connecting block 531 is slidably fitted in the limiting groove. A fixed block is fixedly connected at a position corresponding to the upper side of the connecting block 531 on the loading box 4, and the traction spring 56 is installed between the fixed block and the connecting block 531.

[0034] Reference Figure 3 and Figure 4 The locking frame 54 is horizontally slidably matched with one at the position of the connecting block 531 on the side wall of the charging box 4, and the lifting frame 55 is vertically slidably matched with the charging box 4. The lifting frame 55 is integrally formed with a guide portion 551, which is tilted. From bottom to top is the reference direction, the distance between the guide portion 551 and the lifting frame 55 gradually decreases, and a plurality of balls are embedded on the surface of the guide portion 551. A guide groove 541 is opened on the locking frame 54, and the guide portion 551 passes through the guide groove 541, and the balls abut the side wall of the guide groove 541. The pressing plate 52 is vertically slidably matched with one piece in each feeding channel 42, and both ends of the pressing plate 52 extend out of the charging box 4. The end of the pressing plate 52 is fixedly connected with a contact flange 521, and the counterweight block 51 is fixedly connected to the top wall of the pressing plate 52.

[0035] Reference Figure 2 and Figure 3 In the initial state, the baffle 53 covers the discharge port 411, the lock frame 54 abuts against the top wall of the connecting block 531, and the traction spring 56 is in a stretched state.

[0036] When feeding one by one, each feeding channel 42 is filled with pipes, and then the pressure plate 52 is placed in the feeding channel 42 and contacts the pipes at the highest point. The pipes in the feeding channel 42 with the discharge port 43 are gradually discharged along with the moving conveyor belt 33, and the pressure plate 52 descends until it contacts the flange 521 to press the lifting frame 55, causing the guide part 551 to descend, and at the same time drives the locking frame 54 to move toward the position of the lifting frame 55 to disengage from the moving path of the connecting block 531. The connecting block 531 rises due to the traction spring 56, driving the baffle 53 to rise, and the baffle 53 enters the sliding groove 412 to open the discharge port 411. At this time, the pipes in the middle feeding channel 42 are gradually discharged through the discharge port 411, and so on, the pipes in the remaining feeding channels 42 are discharged, thereby achieving the effect of conveying the pipes one by one.

[0037] Reference Figure 1 and Figure 5 The discharging end of the conveying frame 1 is fixedly connected with a pushing frame 6, a pushing groove 61 is arranged in the pushing frame 6, a pushing member 62 is arranged at the end of the pushing frame 6, the pushing member 62 is a pushing cylinder, and the pushing member 62 is electrically connected to the controller 11. A fixed seat 63 is connected to the outlet of the pushing frame 6 by bolts, and a lifting seat 21 is arranged on the fixed seat 63. A plurality of first T-blocks are fixedly connected to the lifting seat 21. The lifting seat 21 is vertically slidably fitted on the lifting seat 21 through the first T-blocks. A counting sensor 2 is installed on the lifting seat 21, and the sensing end of the counting sensor 2 faces downward, and the counting sensor 2 is electrically connected to the controller 11.

[0038] Reference Figure 6 , a control assembly 7 is provided on the pushing frame 6, and the control assembly 7 includes a rotating frame 71, a connecting plate 72 and a limiting member 73. The rotating frame 71 includes a resisting portion 711 and a lifting portion 712, one end of the resisting portion 711 is hinged on the pushing frame 6, and the other end is located below the lifting seat 21. In the initial state, with the pushing direction of the pipe as the reference direction, the height of the resisting portion 711 gradually decreases. The lifting portion 712 is integrally formed at one end of the resisting portion 711 and is arranged on the same side as the resisting portion 711. The connecting plate 72 is horizontally fixedly connected to the lifting seat 21, and a sliding seat 7121 is provided on the connecting plate 72, and a plurality of second T-blocks are fixedly connected to the sliding seat 7121, and the sliding seat 7121 is slidably matched with the connecting plate 72 through the second T-block, and one end of the lifting portion 712 is hingedly arranged with the sliding seat 7121.

[0039] Reference Figure 6The limiting member 73 is a limiting column. The limiting member 73 is fixedly connected to a plurality of the fixing seat 63. The limiting member 73 is located below the lifting seat 21. The surface of the limiting member 73 is wrapped with a rubber pad 731. The connecting plate 72 is fixedly connected to a mounting column. A pressure spring 721 is installed between the mounting column and the fixing seat 63. The lifting and lowering buffering effect of the lifting seat 21 is achieved through the cooperation of the rubber pad 731 and the pressure spring 721.

[0040] When pushing the pipe, the moving pipe touches the resistance part 711, causing the resistance part 711 to rotate clockwise, driving the lifting part 712 to rotate, causing the connecting plate 72 to rise, driving the lifting seat 21 to rise, and causing the counting sensor 2 to rise. The sensing end of the counting sensor 2 detects the passage of the pipe and sends an electrical signal to the controller 11, causing the control system to count the pipes, thereby achieving the effect of pushing and counting the pipes.

[0041] The implementation principle of a pipe conveying device in an embodiment of the present application is as follows: when preparing pipes, fill the pipes into the feeding channel 42, then place the pressing plate 52 in the feeding channel 42 and contact the top of the highest pipe. When feeding, start the conveying motor 31 through the control system to rotate the conveying roller 32, move the conveying belt 33, and drive the pipe to move through the limiting bar 331. As the pipes in the feeding channel 42 decrease, the pressing plate 52 descends until it contacts the flange 521 to press the lifting frame 55, so that the locking frame 54 moves to disengage from the connecting block 531. The connecting block 531 rises due to the force of the traction spring, driving the baffle 53 to move. And enter the sliding groove 412 to open the discharge port 411, the pipes in the adjacent feeding channel 42 are discharged through the discharge port 411 and fall onto the conveyor belt 33 to transport the pipes one by one, the pipes fall into the pushing rack 6 along the conveyor belt 33, and the pushing member 62 is started to move the pipes. During this process, the pipes touch the resistance part 711, and the resistance part 711 drives the lifting part 712 to rotate, and drives the lifting seat 21 to rise through the connecting plate 72, so that the counting sensor 2 rises, and the sensing end of the counting sensor 2 detects that the pipes have passed, and sends an electrical signal to the controller 11, which controls the system counting, thereby achieving the effect of conveying and counting pipes.

[0042] By setting the rotating frame 71, when pipes of different diameters pass by, the counting sensor 2 always keeps a certain distance from the pipes, ensuring that the counting sensor 2 can accurately sense the pipes and avoiding the occurrence of the phenomenon that the ends of the pipes are lifted up and hit the counting sensor 2 during transportation.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe conveying equipment, characterized in that: The invention comprises a conveying frame (1) and a counting sensor (2), wherein a charging box (4) is arranged at the feeding end of the conveying frame (1), a conveying assembly (3) for conveying pipes is arranged on the conveying frame (1), a pushing frame (6) is arranged at the discharging end of the conveying frame (1), a pushing groove (61) is arranged on the pushing frame (6), a pushing member (62) for pushing pipes is arranged on the pushing frame (6), a fixing seat (63) is arranged on the pushing frame (6), a lifting seat (21) is vertically slidably matched on the fixing seat (63), the counting sensor (2) is mounted on the lifting seat (21), a controller (11) is arranged on the conveying frame (1), the counting sensor (2) is electrically connected to the controller (11), and a control assembly (7) is arranged on the pushing frame (6), and the control assembly (7) comprises a rotating frame (71), a connecting plate (72), and a connecting plate (73). ) and a limiting member (73), the rotating frame (71) comprises a resisting portion (711) and a lifting portion (712), one end of the resisting portion (711) is rotatably connected to the pushing frame (6), the other end of the resisting portion (711) is located below the counting sensor (2) and is arranged obliquely, the height of the resisting portion (711) gradually increases from the counting sensor (2) to the pushing member (62) as a reference direction, the lifting portion (712) is connected to one end of the resisting portion (711) and is arranged on the same side as the resisting portion (711), the connecting plate (72) is connected to the lifting seat (21), the lifting portion (712) is slidably fitted on the connecting plate (72), the limiting member (73) is connected to the fixed seat (63), and the limiting member (73) is used to limit the initial position of the lifting seat (21).

2. The pipe conveying equipment according to claim 1, characterized in that: The connecting plate (72) is slidably matched with a sliding seat (7121), and the lifting portion (712) is rotatably connected to the sliding seat (7121).

3. The pipe conveying equipment according to claim 1, characterized in that: The limiting member (73) is a limiting column, which is connected to the fixing seat (63) and is located below the lifting seat (21). When in the initial position, the lifting seat (21) contacts the limiting member (73).

4. The pipe conveying equipment according to claim 3, characterized in that: The connecting plate (72) is connected to a mounting column, a pressure spring (721) is connected between the mounting column and the fixing seat (63), and a rubber pad (731) is sleeved on the limiting member (73).

5. The pipe conveying equipment according to claim 1, characterized in that: The conveying assembly (3) comprises a conveying motor (31), a conveying roller (32) and a conveying belt (33); the conveying roller (32) is rotatably connected to one of the feeding end and the discharging end of the conveying frame (1); the conveying belt (33) is sleeved between the two conveying rollers (32); the conveying belt (33) is in contact with the surface of the conveying frame (1); the conveying motor (31) is mounted on the conveying frame (1) and is coaxially connected to one of the conveying rollers (32); and the conveying motor (31) is electrically connected to the controller (11).

6. The pipe conveying equipment according to claim 5, characterized in that: The conveyor belt (33) is connected to a plurality of limiting strips (331), and the plurality of limiting strips (331) are evenly distributed along the circumference of the conveyor belt (33). During transportation, the pipe is located between two adjacent limiting strips (331).

7. The pipe conveying equipment according to claim 1, characterized in that: The loading box (4) is connected to a plurality of partitions (41), and the loading box (4) is divided into a plurality of feeding channels (42) by the plurality of partitions (41), wherein a discharge port (43) is provided at the bottom end of one of the feeding channels (42), and a limiting component (5) is provided on the loading box (4) for blocking the movement of pipes in other feeding channels (42).

8. The pipe conveying equipment according to claim 7, characterized in that: The limiting assembly (5) comprises a counterweight block (51), a pressure plate (52), a baffle (53), a locking frame (54), a lifting frame (55) and a traction spring (56); a discharge port (411) and a sliding groove (412) are provided at the bottom end of the partition (41); the baffle (53) is vertically slidably fitted in the sliding groove (412); both ends of the baffle (53) are connected with connecting blocks (531); a limiting groove is provided on the loading box (4); the connecting block (531) is slidably fitted in the limiting groove; a fixing block is connected to the side wall of the loading box (4); the fixing block is located above the connecting block (531); the traction spring (56) is connected between the fixing block and the connecting block (531); the locking frame (54) is horizontally slidably fitted on the side wall of the loading box (4); the lifting frame (55) is vertically slidably fitted on the side wall of the loading box (4); On the side wall of the box (4), the lifting frame (55) is connected with a guide part (551), and the locking frame (54) is provided with a guide groove (541). The guide part (551) is slidably fitted in the guide groove (541). The pressing plate (52) is slidably fitted in each of the feeding channels (42). The counterweight block (51) is connected to the pressing plate (52). Both ends of the pressing plate (52) are connected with a contact flange (521). In the initial position, the baffle (53) covers the discharge port (411), and the locking frame (54) contacts the top of the connecting block (531). The traction spring (56) is in a stretched state. When opened, the contact flange (521) presses the lifting frame (55), and the locking frame (54) is separated from the moving path of the connecting block (531). The baffle (53) is located in the sliding groove (412).

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