Anti-toppling structure for bar conveying on sawing machine

Abstract

The utility model discloses a bar conveying anti-toppling structure on a sawing machine, and aims to overcome the defects that bars on the sawing machine are prone to toppling and slipping, so that the cutting size of the bars has errors, the shearing face is uneven, the bars shake in the cutting process, and potential safety hazards exist. The bar conveying device comprises a plurality of conveying wheel rollers installed on a conveying frame at intervals, supporting parts are arranged on the outer walls of the conveying wheel rollers, the supporting parts are gradually thinned from the two ends to the middle to form supporting grooves, auxiliary supporting wheels are installed between the adjacent conveying wheel rollers, and the supporting grooves and the auxiliary supporting wheels both support bars. According to the bar conveying anti-toppling structure on the sawing machine, stable conveying of bars can be achieved, the cutting stability of the bars is guaranteed, the cutting size of the bars is not prone to errors, the shearing face is flat, and the cutting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of sawing machines, and more particularly to a bar material conveying anti-dumping structure on a sawing machine. Background Art

[0002] When loading bars onto a saw, ensuring reliable loading during the cutting process is crucial to prevent them from tipping over. Currently, a common loading method involves directly supporting the bars on cylindrical rollers, which rotate to convey the bars. Since the bars being cut are often cylindrical, the bars supported on the rollers are prone to tipping over and slipping, resulting in errors in the cut dimensions, uneven shear surfaces, and wobbling during the cutting process, posing a safety hazard. Utility Model Content

[0003] In order to overcome the above shortcomings, the utility model provides a bar conveying anti-dumping structure on a sawing machine, which can realize the smooth conveying of the bar, ensure the stability of the bar cutting, and the bar cutting size is not prone to error, the shear surface is flat, and the cutting effect is good.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a bar conveying anti-dumping structure on a sawing machine, comprising a plurality of conveying rollers installed at intervals on a conveying frame, a support portion being provided on the outer wall of the conveying roller, the support portion gradually becoming thinner from both ends to the middle to form a support groove, and an auxiliary support wheel being installed between adjacent conveying rollers, the support groove and the auxiliary support wheel both supporting the bar.

[0005] The bars are loaded onto the conveyor rollers, which support them. The rollers rotate, pushing the bars forward and conveying them. The support portion tapers from both ends toward the center, forming a V-shaped support groove. The grooves on the conveyor roller support portion position the bars, preventing them from slipping out of the grooves and potentially tipping over on the saw. Auxiliary support wheels are installed between adjacent conveyor rollers to provide additional support for the bars. This is especially true when the distance between adjacent conveyor rollers is large. When the bars are conveyed through this distance, the ends of the bars are suspended. The auxiliary support wheels provide additional support for the bars, preventing them from drifting and tipping over due to prolonged suspension.

[0006] The anti-dumping structure for conveying bars on the sawing machine of this patent application can realize the smooth conveying of bars, ensure the stability of bar cutting, and the bar cutting size is not prone to error, the shearing surface is flat, and the cutting effect is good.

[0007] Preferably, both ends of the conveying roller are rotatably mounted on the conveying frame, and two adjacent conveying rollers are transmission-connected.

[0008] The two ends of the conveying rollers are rotatably arranged, and the adjacent conveying rollers are transmission-connected, so that all the conveying rollers operate synchronously to realize the mobile conveying of the bar.

[0009] Preferably, two drive motors are installed on the conveying frame, and the output shafts of the drive motors are transmission-connected to a conveying roller.

[0010] The conveying rollers are driven by two drive motors, and the drive is stable and reliable.

[0011] Preferably, two adjacent conveying rollers are connected by a transmission chain, and tensioning wheels are provided on the conveying frame and corresponding to the transmission chain, and the tensioning wheels are adapted to be pressed onto the transmission chain.

[0012] The transmission connection is achieved through the transmission chain, the transmission force is large, and the tensioning wheel realizes the tensioning of the transmission chain, ensuring the reliability of the transmission.

[0013] Preferably, the auxiliary support wheel gradually becomes thicker from the middle to both ends to form an auxiliary support groove.

[0014] The auxiliary support groove gradually becomes thicker from the middle to both ends, thereby forming a V-shaped structure, which has a good supporting and positioning effect on the rod.

[0015] Preferably, support beams are provided on the conveying frame and corresponding to the auxiliary support wheels, two opposite supports are provided on the support beams, mounting grooves are provided on the supports, and both ends of the auxiliary support wheels are rotatably connected to the two mounting grooves respectively.

[0016] Both ends of the auxiliary support wheel are rotatably mounted on two supports, and the two supports are mounted on the support beam, thereby ensuring reliable installation of the auxiliary support wheel.

[0017] In another solution, the auxiliary support wheel includes two rolling columns arranged opposite to each other on the left and right sides, and the height of the rolling columns is higher than the conveying wheel roller.

[0018] The two rolling columns are higher than the conveying rollers, and the rolling columns are close to the outer wall of the bar to increase the support point, and the support point height is relatively high, further improving the stability of the bar conveying.

[0019] Preferably, two slides are provided on the conveying frame corresponding to the two rolling columns. The slides are slidably provided to move closer to or away from each other. A rotatable connecting arm is installed on the slide, and the two rolling columns are rotatably installed on the two connecting arms respectively.

[0020] The two slides can move toward or away from each other, thereby moving the two rolling columns toward or away from each other, providing flexible and convenient support for rods of varying outer diameters. The connecting arm rotates to adjust the angle of the rolling columns, ensuring reliable support for the rods.

[0021] Preferably, a screw is installed on the conveying frame, and two thread segments with opposite spiral directions are provided on the screw. The two thread segments are respectively threadedly connected to the two slides, and the screw rotates to achieve the two slides approaching or moving away from each other.

[0022] The two slides can be moved closer to or farther away from each other by rotating the screw, and the movement of the slides is easy.

[0023] Preferably, a rotating rod is installed on the conveying frame, a rack is provided on the slide, a gear is provided on the rotating rod, and the gear is meshed and transmitted between the racks of the two slides.

[0024] The rotating rod rotates to rotate the gear, and the meshing transmission between the rack and the gear realizes the two slides to move closer or farther away from each other. The movement of all slides can be controlled by a single rotating rod, which is convenient to operate.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the anti-dumping structure for conveying rods on the sawing machine of this patent application can realize the smooth conveying of rods, ensure the smoothness of rod cutting, the error of rod cutting size is not easy to occur, the shear surface is flat, and the cutting effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the present utility model.

[0027] Figure 2 It is a partial structural diagram of the utility model.

[0028] Figure 3 This is a side view of the auxiliary support wheel installation of Example 1 of the present utility model.

[0029] Figure 4 This is a side view of the auxiliary support wheel installation of Example 2 of the present utility model.

[0030] Figure 5 This is a side view of the auxiliary support wheel installation of Example 3 of the present utility model.

[0031] In the figure: 1. conveyor frame, 2. conveyor roller, 3. support groove, 4. auxiliary support wheel, 5. connecting shaft, 6. mounting seat, 7. drive motor, 8. tensioning wheel, 9. transmission sprocket, 10. crossbeam, 11. longitudinal beam, 12. column, 13. bottom plate, 14. reinforcement plate, 15. auxiliary support groove, 16. support beam, 17. support, 18. mounting groove, 19. rotating column, 20. rolling column, 21. slide, 22. connecting arm, 23. guide groove, 24. guide column, 25. positioning spring, 26. locking screw, 27. connecting groove, 28. screw, 29. rotary handle, 30. guide rod, 31. rotating rod, 32. rack, 33. gear. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0033] Example 1: A structure for preventing tipping of rods conveyed on a sawing machine (see attached Figure 1 To the attached Figure 3 The conveyor frame 1 comprises a plurality of conveyor rollers 2 spaced apart and arranged in a row, with their axes parallel to each other. Support portions are provided on the outer walls of the conveyor rollers 2, positioned in the middle of the rollers. These portions taper from both ends toward the center, forming support grooves 3. The support grooves 3 on all conveyor rollers 2 are uniformly sized. Auxiliary support wheels 4 are installed between adjacent conveyor rollers 2. Both the support grooves 3 and the auxiliary support wheels 4 support the bar material.

[0034] Both ends of the conveyor roller 2 are rotatably mounted on the conveyor frame 1. Connecting shafts 5 are provided at both ends of the conveyor roller 2. Mounting seats 6 are provided on the conveyor frame 1 corresponding to the connecting shafts 5. Mounting holes are provided on the mounting seats 6, and bearings are installed between the connecting shafts 5 and the mounting holes. Adjacent conveyor rollers 2 are connected by a transmission chain. Two drive motors 7 are installed on the conveyor frame 1, and the output shafts of the drive motors 7 are connected by a transmission chain. Tensioning pulleys 8 are provided on the conveyor frame 1 corresponding to the transmission chain, and the tensioning pulleys 8 are adapted to be press-fitted onto the transmission chain. A transmission sprocket 9 is provided on the connecting shaft 5 at one end of the conveyor roller 2, and the transmission chain is adapted to fit the transmission sprocket 9.

[0035] The conveyor frame 1 includes two crossbeams 10 and several longitudinal beams 11 connected between the two crossbeams 10. A number of columns 12 are spaced apart and connected to the crossbeams 10. The columns 12 support the entire conveyor frame 1. A base plate 13 is provided at the lower end of the column 12. The base plate 13 is supported on the ground, providing a large support area and improving the stability of the entire conveyor frame 1. Mounting blocks 6 connected to the connecting shafts 5 at both ends of the conveyor rollers 2 are mounted on the two crossbeams 10. A reinforcement plate 14 is installed between the two crossbeams 10. The reinforcement plate 14 is placed above the longitudinal beam 11 and below the conveyor rollers 2. The reinforcement plate 14, crossbeams 10, and longitudinal beams 11 are tightly connected to form a single unit.

[0036] The auxiliary support wheel 4 gradually becomes thicker from the middle to both ends to form an auxiliary support groove 15. The auxiliary support groove 15 formed by gradually becoming thicker from the middle to both ends is in a V-shaped structure, which has a good supporting and positioning effect on the rod. A support beam 16 is provided on the conveying frame 1 and corresponds to the auxiliary support wheel 4. Two opposite supports 17 are provided on the support beam 16. A mounting groove 18 is provided on the support 17. The two ends of the auxiliary support wheel 4 are rotatably connected to the two mounting grooves 18 respectively. The two ends of the auxiliary support wheel 4 are rotatably mounted on the two supports 17, and the two supports 17 are mounted on the support beam 16, which ensures the reliable installation of the auxiliary support wheel 4. Rotating columns 19 are provided at both ends of the auxiliary support wheel 4, and the two rotating columns 19 are respectively installed in the two mounting grooves 18. The inclination angles on both sides of the auxiliary support groove 15 are consistent with the inclination angles on both sides of the support groove 3, and the height position of the auxiliary support groove 15 is consistent with the height position of the support groove 3.

[0037] The rods are loaded onto the conveying rollers 2, which support the rods. The conveying rollers 2 rotate to push the rods to move and transport the rods. The support portion gradually tapers from both ends to the middle to form a support groove 3, which has a V-shaped structure. The support groove 3 on the support portion of the conveying roller 2 positions the rods, preventing them from slipping out of the support groove 3 and thus preventing them from tipping over on the sawing machine. Furthermore, auxiliary support wheels 4 are installed between adjacent conveying rollers 2, which provide auxiliary support for the rods. This is especially true when the distance between two adjacent conveying rollers 2 is large, and the rods are transported through this distance, leaving the ends of the rods suspended. At this time, the auxiliary support wheels 4 provide auxiliary support for the rods, preventing them from deviating and tipping over due to prolonged suspension. The auxiliary support grooves 15 formed by the auxiliary support wheels 4 gradually becoming thicker from the middle to the two ends have a V-shaped structure, which provides good support and positioning effects for the rods.

[0038] Example 2: A structure for preventing tipping of bars conveyed on a sawing machine (see attached Figure 4 The conveyor frame 1 comprises a plurality of conveyor rollers 2 spaced apart and arranged in a row, with their axes parallel to each other. Support portions are provided on the outer walls of the conveyor rollers 2, positioned in the middle of the rollers. These portions taper from both ends toward the center, forming support grooves 3. The support grooves 3 on all conveyor rollers 2 are uniformly sized. Auxiliary support wheels 4 are installed between adjacent conveyor rollers 2. Both the support grooves 3 and the auxiliary support wheels 4 support the bar material.

[0039] Both ends of the conveyor roller 2 are rotatably mounted on the conveyor frame 1. Connecting shafts 5 are provided at both ends of the conveyor roller 2. Mounting seats 6 are provided on the conveyor frame 1 corresponding to the connecting shafts 5. Mounting holes are provided on the mounting seats 6, and bearings are installed between the connecting shafts 5 and the mounting holes. Adjacent conveyor rollers 2 are connected by a transmission chain. Two drive motors 7 are installed on the conveyor frame 1, and the output shafts of the drive motors 7 are connected by a transmission chain. Tensioning pulleys 8 are provided on the conveyor frame 1 corresponding to the transmission chain, and the tensioning pulleys 8 are adapted to be press-fitted onto the transmission chain. A transmission sprocket 9 is provided on the connecting shaft 5 at one end of the conveyor roller 2, and the transmission chain is adapted to fit the transmission sprocket 9.

[0040] The conveyor frame 1 includes two crossbeams 10 and several longitudinal beams 11 connected between the two crossbeams 10. A number of columns 12 are spaced apart and connected to the crossbeams 10. The columns 12 support the entire conveyor frame 1. A base plate 13 is provided at the lower end of the column 12. The base plate 13 is supported on the ground, providing a large support area and improving the stability of the entire conveyor frame 1. Mounting blocks 6 connected to the connecting shafts 5 at both ends of the conveyor rollers 2 are mounted on the two crossbeams 10. A reinforcement plate 14 is installed between the two crossbeams 10. The reinforcement plate 14 is placed above the longitudinal beam 11 and below the conveyor rollers 2. The reinforcement plate 14, crossbeams 10, and longitudinal beams 11 are tightly connected to form a single unit.

[0041] The auxiliary support wheel 4 includes two rolling columns 20 arranged opposite to each other on the left and right sides. The rolling columns 20 are higher than the conveying roller 2, and the side walls of the rolling columns 20 are in contact with the side walls of the rod. Two slides 21 are set on the conveying frame 1 corresponding to the two rolling columns 20. The slides 21 are set to slide to move closer to or away from each other. A rotatable connecting arm 22 is installed on the slide 21, and the two rolling columns 20 are rotatably mounted on the two connecting arms 22. The two connecting arms 22 are set at an angle, and the lower ends of the connecting arms 22 are rotatably mounted on the slide 21. The slide 21 is provided with an arc-shaped guide groove 23, and the connecting arms 22 are provided with guide columns 24. The guide columns 24 are inserted into the guide groove 23. Positioning springs 25 are installed on both sides of the guide columns 24 in the guide groove 23. A locking screw 26 is connected to the connecting arm 22, and the end of the locking screw 26 abuts against the slide 21 to achieve the positioning of the connecting arm 22. A U-shaped connecting groove 27 is provided at the upper end of the connecting arm 22 , and both ends of the rolling column 20 are rotatably connected to the two side walls of the connecting groove 27 respectively.

[0042] A screw 28 is mounted on the conveyor frame 1. Screw 28 has two threaded sections with opposite helical directions, each threadedly connected to the two slides 21. Rotation of screw 28 moves the two slides 21 toward or away from each other. An L-shaped handle 29 is connected to one end of screw 28. Support beams 16 are provided on the conveyor frame 1, corresponding to the auxiliary support wheels 4. Screw 28 is rotatably mounted on support beams 16. Guide rods 30 are provided on support beams 16, and the slides 21 are movably connected to the guide rods 30.

[0043] The two rollers 20 extend beyond the conveyor rollers 2. They abut against the outer wall of the bar, providing additional support points. The higher support points further enhance smooth bar conveying. The two slides 21 can slide toward or away from each other, allowing the two rollers 20 to move closer or further apart, providing flexible and convenient support for bars of varying outer diameters. The connecting arm 22 rotates to adjust the angle of the rollers 20, ensuring reliable support for the bars.

[0044] The rods are loaded onto the conveying rollers 2, which support the rods. The conveying rollers 2 rotate to push the rods to move and transport them. The support portion tapers from both ends to the middle to form support grooves 3. The support grooves 3 are V-shaped. The support grooves 3 on the support portion of the conveying rollers 2 position the rods, preventing them from slipping out of the support grooves 3 and thus tipping over on the sawing machine. Furthermore, auxiliary support wheels 4 are installed between adjacent conveying rollers 2. The auxiliary support wheels 4 provide auxiliary support for the rods, especially when the distance between two adjacent conveying rollers 2 is large. When the rods are transported through this distance, the ends of the rods are suspended. At this time, the auxiliary support wheels 4 provide auxiliary support for the rods, preventing them from deviating and tipping over due to prolonged suspension.

[0045] Example 3: A structure for preventing tipping of rods conveyed on a sawing machine (see attached Figure 5 The conveyor frame 1 comprises a plurality of conveyor rollers 2 spaced apart and arranged in a row, with their axes parallel to each other. Support portions are provided on the outer walls of the conveyor rollers 2, positioned in the middle of the rollers. These portions taper from both ends toward the center, forming support grooves 3. The support grooves 3 on all conveyor rollers 2 are uniformly sized. Auxiliary support wheels 4 are installed between adjacent conveyor rollers 2. Both the support grooves 3 and the auxiliary support wheels 4 support the bar material.

[0046] Both ends of the conveyor roller 2 are rotatably mounted on the conveyor frame 1. Connecting shafts 5 are provided at both ends of the conveyor roller 2. Mounting seats 6 are provided on the conveyor frame 1 corresponding to the connecting shafts 5. Mounting holes are provided on the mounting seats 6, and bearings are installed between the connecting shafts 5 and the mounting holes. Adjacent conveyor rollers 2 are connected by a transmission chain. Two drive motors 7 are installed on the conveyor frame 1, and the output shafts of the drive motors 7 are connected by a transmission chain. Tensioning pulleys 8 are provided on the conveyor frame 1 corresponding to the transmission chain, and the tensioning pulleys 8 are adapted to be press-fitted onto the transmission chain. A transmission sprocket 9 is provided on the connecting shaft 5 at one end of the conveyor roller 2, and the transmission chain is adapted to fit the transmission sprocket 9.

[0047] The conveyor frame 1 includes two crossbeams 10 and several longitudinal beams 11 connected between the two crossbeams 10. A number of columns 12 are spaced apart and connected to the crossbeams 10. The columns 12 support the entire conveyor frame 1. A base plate 13 is provided at the lower end of the column 12. The base plate 13 is supported on the ground, providing a large support area and improving the stability of the entire conveyor frame 1. Mounting blocks 6 connected to the connecting shafts 5 at both ends of the conveyor rollers 2 are mounted on the two crossbeams 10. A reinforcement plate 14 is installed between the two crossbeams 10. The reinforcement plate 14 is placed above the longitudinal beam 11 and below the conveyor rollers 2. The reinforcement plate 14, crossbeams 10, and longitudinal beams 11 are tightly connected to form a single unit.

[0048] The auxiliary support wheel 4 includes two rolling columns 20 arranged opposite to each other on the left and right sides. The rolling columns 20 are higher than the conveying roller 2, and the side walls of the rolling columns 20 are in contact with the side walls of the rod. Two slides 21 are set on the conveying frame 1 corresponding to the two rolling columns 20. The slides 21 are set to slide to move closer to or away from each other. A rotatable connecting arm 22 is installed on the slide 21, and the two rolling columns 20 are rotatably mounted on the two connecting arms 22. The two connecting arms 22 are set at an angle, and the lower ends of the connecting arms 22 are rotatably mounted on the slide 21. The slide 21 is provided with an arc-shaped guide groove 23, and the connecting arms 22 are provided with guide columns 24. The guide columns 24 are inserted into the guide groove 23. Positioning springs 25 are installed on both sides of the guide columns 24 in the guide groove 23. A locking screw 26 is connected to the connecting arm 22, and the end of the locking screw 26 abuts against the slide 21 to achieve the positioning of the connecting arm 22. A U-shaped connecting groove 27 is provided at the upper end of the connecting arm 22 , and both ends of the rolling column 20 are rotatably connected to the two side walls of the connecting groove 27 respectively.

[0049] A rotating rod 31 is mounted on the conveyor frame 1, and a rack 32 is provided on the slide 21. A gear 33 is also mounted on the rotating rod 31. The gear 33 meshes and drives between the racks 32 of the two slides 21. Support beams 16 are provided on the conveyor frame 1 and corresponding to the auxiliary support wheels 4. Guide rods 30 are provided on the support beams 16, and the slides 21 are movably connected to the guide rods 30. Rotation of the rotating rod 31 rotates the gear 33, and the meshing transmission between the rack 32 and the gear 33 allows the two slides 21 to move closer or farther from each other. This single rotating rod 31 allows for the movement of all slides 21 to be controlled, making operation convenient.

[0050] The two rollers 20 extend beyond the conveyor rollers 2. They abut against the outer wall of the bar, providing additional support points. The higher support points further enhance smooth bar conveying. The two slides 21 can slide toward or away from each other, allowing the two rollers 20 to move closer or further apart, providing flexible and convenient support for bars of varying outer diameters. The connecting arm 22 rotates to adjust the angle of the rollers 20, ensuring reliable support for the bars.

[0051] The rods are loaded onto the conveying rollers 2, which support the rods. The conveying rollers 2 rotate to push the rods to move and transport them. The support portion tapers from both ends to the middle to form support grooves 3. The support grooves 3 are V-shaped. The support grooves 3 on the support portion of the conveying rollers 2 position the rods, preventing them from slipping out of the support grooves 3 and thus tipping over on the sawing machine. Furthermore, auxiliary support wheels 4 are installed between adjacent conveying rollers 2. The auxiliary support wheels 4 provide auxiliary support for the rods, especially when the distance between two adjacent conveying rollers 2 is large. When the rods are transported through this distance, the ends of the rods are suspended. At this time, the auxiliary support wheels 4 provide auxiliary support for the rods, preventing them from deviating and tipping over due to prolonged suspension.

[0052] The above-described embodiments are only preferred solutions of the present invention and do not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A rod conveying anti-dumping structure on a sawing machine, characterized in that: It includes several conveying rollers installed at intervals on the conveying frame. A support part is provided on the outer wall of the conveying roller. The support part gradually becomes thinner from both ends to the middle to form a support groove. Auxiliary support wheels are installed between adjacent conveying rollers. The support groove and the auxiliary support wheels both support the rods.

2. The anti-dumping structure for conveying bars on a sawing machine according to claim 1 is characterized in that: Both ends of the conveying roller are rotatably mounted on the conveying frame, and two adjacent conveying rollers are transmission-connected.

3. The anti-dumping structure for conveying bars on a sawing machine according to claim 2 is characterized in that: Two driving motors are installed on the conveying frame, and the output shafts of the driving motors are transmission-connected with a conveying roller.

4. The anti-dumping structure for conveying bars on a sawing machine according to claim 1 is characterized in that: Two adjacent conveying wheel rollers are connected by a transmission chain. A tensioning wheel is provided on the conveying frame corresponding to the transmission chain, and the tensioning wheel is adapted to be pressed onto the transmission chain.

5. The anti-dumping structure for conveying bars on a sawing machine according to any one of claims 1 to 4, characterized in that: The auxiliary support wheel gradually becomes thicker from the middle to both ends to form an auxiliary support groove.

6. The anti-dumping structure for conveying bars on a sawing machine according to claim 5 is characterized in that: Support beams are provided on the conveying frame and corresponding to the auxiliary support wheels. Two opposite supports are provided on the support beams. Mounting grooves are provided on the supports. Two ends of the auxiliary support wheels are rotatably connected to the two mounting grooves respectively.

7. The anti-dumping structure for conveying bars on a sawing machine according to any one of claims 1 to 4, characterized in that: The auxiliary supporting wheel comprises two rolling columns which are arranged opposite to each other on the left and right sides, and the height of the rolling columns is higher than the conveying wheel roller.

8. The anti-dumping structure for conveying bars on a sawing machine according to claim 7 is characterized in that: Two slides are arranged on the conveying frame corresponding to the two rolling columns. The slides are slidably arranged to move closer to or farther away from each other. A rotatable connecting arm is installed on the slide, and the two rolling columns are rotatably installed on the two connecting arms respectively.

9. The anti-dumping structure for conveying bars on a sawing machine according to claim 8 is characterized in that: A screw is installed on the conveyor frame. Two thread segments with opposite spiral directions are arranged on the screw. The two thread segments are respectively connected with the two slides through threads. The screw rotates to move the two slides closer to or farther away from each other.

10. The anti-dumping structure for conveying bars on a sawing machine according to claim 8, characterized in that: A rotating rod is installed on the conveying frame, a rack is arranged on the slide, a gear is arranged on the rotating rod, and the gears are meshed and transmitted between the racks of the two slides.

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