An improved loading device for horizontally conveying long profiles

Abstract

An improved loading device for horizontally conveying long strips of profiles, comprising a frame, and at least two feeding belts extending horizontally in the front-to-back direction are arranged at intervals on the frame, and the feeding belts can rotate so as to carry the long strips of profiles placed on their top support surfaces forward horizontally; it is characterized in that at least one auxiliary smooth rail is also provided on the frame, and the auxiliary smooth rail is horizontally extended and arranged on the side of the feeding belt, and the top support surface of the auxiliary smooth rail is basically flush with the top support surface of the feeding belt for jointly supporting the profiles.

Description

Technical Field

[0001] The present invention relates to the technical field related to profile processing, and in particular to a loading device used for horizontally conveying long profiles. Background Art

[0002] Due to production and transportation equipment limitations and cost considerations, the length of typical long profiles is typically set at 4 to 12 meters. When processing such long profiles, traditional manual loading methods are no longer able to adapt to the pace of modern processing. Therefore, researchers have developed loading devices specifically for horizontally conveying long profiles. However, long profiles are prone to tangling during conveyance, resulting in profile stacking. This stacking is not conducive to processing each profile individually. In order to solve the stacking problem that occurs when profiles are transported horizontally, the Chinese invention patent No. ZL201510429585.3 previously applied for by the applicant discloses a long pipe sorting feeder and a sorting feeding method. The feeder includes a frame, a feeding conveyor belt arranged on the frame, a feeding device arranged in front of the feeding conveyor belt, and a silo device arranged behind the feeding conveyor belt. At least one row of feeding conveyor belts is arranged on the left and right sides of the frame. A row of feeding conveyor belts includes a front conveyor belt that can be rubbed and a rear conveyor belt that moves forward unidirectionally; in particular, the front conveyor belt provides a rubbing force to the pipes thereon, which can enable the stacked pipes to continuously self-adjust, straighten out the tangles, and gradually separate.

[0003] Since the rubbing operation of the front conveyor belt in the above patent moves at a fixed frequency, some tightly stacked profiles may not be separated. Such stacked profiles may be forcibly squeezed by the machine when continuing to be conveyed forward, causing profile deformation or machine damage. For this reason, the Chinese invention patent with patent number ZL201910100127.3 discloses a feeder and a pipe cutting production line using the same. This patent is improved on the basis of patent ZL201510429585.3. A toggle switch is provided between the limit device and the feeding mechanism. The toggle switch is located on the upper side of the reciprocating conveying device. The toggle switch triggers the reciprocating device to perform reciprocating motion, thereby solving the problem of the single support action of the front conveyor belt in the prior art, which is conducive to solving the problem of pipe entanglement and easy deformation of pipes due to squeezing.

[0004] However, since long profiles have a certain elastic deformation ability, especially when there is a long distance between the feeding belts used to support the profiles, the diameter of the profiles is small, or the material of the profiles is soft, the profiles will partially fall or warp due to their own deformation. This deformation of the profiles is likely to cause the diverter switch to make an incorrect judgment during the forward conveyance of the profiles, thereby causing deformation of the profiles or damage to the machine. Summary of the Invention

[0005] In a loading device for conveying long profiles, the problem of deformation of the long profiles themselves is related to the problem of profile stacking. For example, after deformation, the stacked profiles become more entangled, making it more difficult to separate the profiles; the stacked profiles may avoid the toggle switch due to partial drop of the profiles, which may cause the stacked profiles to be squeezed and deformed when conveyed forward; a single profile may mistakenly trigger the toggle switch due to partial upward tilt, causing the conveyor belt to repeatedly reciprocate and waste resources. In response to the above technical problems, the present invention provides an improved loading device for horizontally conveying long profiles, comprising a frame, at least two feeder belts extending horizontally in a front-to-rear direction are arranged on the frame at intervals, the feeder belts being able to rotate so as to carry the long profiles placed on their top support surfaces horizontally forward; and the frame is further provided with at least one auxiliary smooth rail, the auxiliary smooth rail extending horizontally and arranged on the side of the feeder belt, the top support surface of the auxiliary smooth rail being substantially flush with the top support surface of the feeder belt for jointly supporting the profiles.

[0006] Among them, the frame refers to a basic supporting component of the loading device, and the frame has an extension structure in the front-to-back direction and the left-to-right direction to provide stable support for the feeding belt, auxiliary smooth rail, transmission component and the long profile placed on the feeding belt mentioned later. The front-to-back direction of the frame mentioned here is basically consistent with the front-to-back direction of the feeding belt and the horizontal transmission direction of the profile mentioned later. Correspondingly, the left-to-right direction of the frame is basically consistent with the axial extension direction of the long profile after it is placed on the loading device.

[0007] Among them, the feed belt refers to a transmission component used to drive the profile to move horizontally. In order to achieve the horizontal movement of the profile, the feed belt can rotate in the front and back directions; multiple feed belts should also rotate synchronously to ensure that the long profile can move horizontally smoothly as a whole.

[0008] Among them, the auxiliary smooth rail refers to an auxiliary component used to support the long profile. By setting one or more auxiliary smooth rails, auxiliary support can be effectively provided for the long profile, and good support can be provided for the profile during the movement of the profile, which is conducive to allowing the long profile to move horizontally in a straight posture.

[0009] To protect the profile surface, a further technical solution is that the auxiliary smooth rail includes a metal support and a non-metallic surface layer applied on the metal support, with the top surface of the non-metallic surface layer forming the top support surface of the auxiliary smooth rail. This helps reduce scratches on the profile and protects the profile surface, while also increasing the contact area with the profile and providing a certain amount of friction for the long profile.

[0010] Among them, the top support surface of the auxiliary smooth rail is basically level with the top support surface of the feeding belt, and its function is to make all the supporting points of the supporting long profile fall on the same straight line so that the profile can maintain a straight arrangement; the situations in which the supporting surfaces of the two components are basically level are various. For example, when the supporting surfaces of the two components are both planes, the two supporting surfaces are set to basically coincide; and sometimes in order to improve the conveying effect of the feeding belt, the supporting surface of the feeding belt is set to a regular wavy shape, so that the top support surface of the auxiliary smooth rail is set slightly lower than the highest point of the wavy surface of the feeding belt to support the profile to maintain a straight posture.

[0011] According to the above technical scheme, compared with the existing technology, the beneficial technical effects of the present invention are: First, by arranging the auxiliary smooth rail on the side of the feeding belt, it can not only provide good auxiliary support for the long profile when it moves horizontally, but also reduce the number of the feeding belts set under the premise of ensuring the transmission capacity, thereby greatly saving the manufacturing cost and subsequent maintenance cost of the machine; Second, the fixed auxiliary smooth rail provides support for the long profile while also providing a certain friction resistance for the profile. This friction force is conducive to separating the profile from the profile stacked on it when the profile moves. At the same time, the friction force provided by the auxiliary smooth rail to the profile can also cause the profile to roll to a certain extent, which is more conducive to separating the twisted and stacked profiles; Third, under the support of the auxiliary smooth rail, the long profile can be placed on the feeding belt in a straight posture, and the long profile can better overlap the top support surface of the feeding belt, which is conducive to increasing the contact area between the profile and the feeding belt, and is conducive to ensuring that the entire profile can follow the feeding belt to move forward horizontally.

[0012] Sometimes it is difficult to untie the stacked profiles by rolling the profiles themselves. The stacked profiles can be untied by further utilizing the characteristic that the friction between the stacked profiles is smaller than the friction between the profiles and the feed belt. A further technical solution may be that the loading device also includes a controller and a driver and a sensor connected to the controller by signal, the driver is used to drive the feed belt to rotate forward and reverse under the control of the controller, the sensor is arranged above the feed belt, the sensor is used to detect the stacked profiles passing below it and provide the corresponding detection signal to the controller, the controller is arranged to immediately drive the feed belt to rotate in the opposite direction by a threshold step when the feed belt moves horizontally with the profile and receives the detection signal.

[0013] Among them, the position where the sensor is arranged is the space above the feeding belt. Looking from top to bottom, the sensor can have a certain offset with the feeding belt or the auxiliary smooth rail in the left and right directions, or it can be arranged directly above the feeding belt or the auxiliary smooth rail; in order to enable the sensor to detect the stacked profiles passing under it, the vertical distance between the sensor and the top support surface of the feeding belt is generally set to be slightly larger than the diameter of a single profile and less than twice the diameter of the profile, so that the stacked profiles can be sensed and detected when passing under the sensor. Among them, the reverse rotation of the feed belt by a threshold step refers to a minimum moving distance value (or angle value, time value) for the feed belt to rotate in the reverse direction and then forward and to be able to untie the stacking state of the long profiles. The long profiles rotate in the reverse direction for this distance value under the drive of the feed belt and then resume the forward rotation. Since the friction between the profiles is less than the friction between the profiles and the feed belt, the profiles stacked on top will generate an inertial force to maintain the original moving direction when moving and changing direction. With the help of this inertial force, the profiles stacked on top can slide onto the feed belt, thereby untying the stacking state between the long profiles.

[0014] If the stacked profiles and the sensor are detected by rigid contact, this may cause deformation of the profiles and significantly reduce the service life of the sensor. To protect the profiles and the sensor, a further technical solution may be that the sensor is a travel switch comprising a touch arm and a switch. The touch arm is used to detect stacked profiles passing below it by contact and transmit a collision signal to the switch, and the switch signal is connected to the controller. In one embodiment, the touch arm is mounted on a mounting plate above the feed belt and can swing back and forth via a rotating shaft. The switch is mounted on one side of the touch arm. The touch arm extends downward to a position greater than one profile diameter and less than two profile diameters from the feed belt. When stacked profiles pass below the sensor, the profiles can contact and push the touch arm to swing. The swinging of the touch arm triggers the switch, thereby transmitting the collision signal to the switch. The switch can be a contact switch or a non-contact inductive switch. The use of a non-contact inductive switch is more beneficial to the service life of the sensor because it does not require contact with the touch arm.

[0015] In order to ensure that multiple feeding belts can rotate synchronously, a further technical solution can also be that the feeding belt is a chain belt and is driven to move by a pair of driving sprockets and a driven sprocket, and also includes a main drive shaft rotatably arranged on the frame, and the driving sprockets of all feeding belts are transmission-connected to the main drive shaft, and the driver is transmission-connected to the main drive shaft and drives all the feeding belts to rotate synchronously through the main drive shaft; the feeding belt includes a metal meshing portion meshing with the sprocket and a non-metallic supporting portion connected to the side or top of the metal meshing portion, the upper surface of the non-metallic supporting portion constitutes the top support surface of the supporting profile, and the upper surface of the non-metallic supporting portion is higher than the upper surface of the metal meshing portion. Among them, the feeding belt is not only a component for supporting the profile but also a transmission component that can be rotated by the driving sprocket. The metal meshing part is a roller chain structure. The metal meshing part cooperates with the driving sprocket and the driven sprocket to have good rotation synchronization, and the non-metallic support part is mainly used to support the profile. Multiple non-metallic support parts form a top support surface with regular height fluctuations; the feeding belt arranged in this way can not only realize the synchronous rotation of multiple feeding belts, but also can carry the long profile horizontally forward without scratching the profile.

[0016] In order to adapt to profiles of different diameters, a further technical solution may also include a limit frame, which is arranged above the feeding belt and can adjust the height relative to the feeding belt. The sensor is arranged on the limit frame so that the position height of the sensor relative to the feeding belt can be adjusted.

[0017] Of course, in order to better solve the problem of profile stacking, on the basis of using the auxiliary smooth rail, in the same embodiment, the chain-type feeding belt, the touch arm that can better detect the problem of profile stacking, and the limit frame that can adapt to different profiles can also be used in combination to achieve better conveying effects.

[0018] In order to facilitate the conveying of the profiles one by one when they are conveyed from the loading device to the next processing step, and to allow the profiles to be arranged one by one in sequence after passing through the sensor, a further technical solution can also be that it also includes a first inclined slide rail set on the frame and a limit rod arranged above the first inclined slide rail, the first inclined slide rail and the limit rod are combined to form a downwardly inclined storage cavity, the front end of the storage cavity is connected to the downstream of the feeding belt or the auxiliary smooth rail so as to be able to receive the profiles output from the feeding belt, and the limit rod is detachably connected to the limit frame so as to be able to adjust the height of the storage cavity. The storage cavity refers to the space between the first inclined slide rail and the limit rod, the feeding belt conveys the profiles to the storage cavity, and slides to the bottom of the storage cavity along the first inclined slide rail under the action of the self-weight of the profile, and by adjusting the height of the storage cavity to be slightly larger than the diameter of the conveyed profile, the profiles can be well and neatly arranged one by one in the storage cavity.

[0019] Since the present invention has the above characteristics and advantages, it can be applied to an improved loading device for transversely conveying long profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the axial structure of a feeding device using the feeding device;

[0021] Figure 2 This is a schematic diagram of the structure of a feeding device using the feeding device as viewed from the left;

[0022] Figure 3 This is a schematic diagram of the axial structure of the feeding device;

[0023] Figure 4 Schematic diagram of the exploded structure of the feeding belt;

[0024] Figure 5 1 is a structural diagram of the auxiliary smooth rail;

[0025] Figure 6 Schematic diagram of the structure of the limiting frame;

[0026] Figure 7 It is a schematic diagram of the exploded structure of the rotation positioning device. DETAILED DESCRIPTION

[0027] The structure of the improved loading device 2 for horizontally conveying long profiles according to the technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1 and Figure 2As shown, this is a set of feeding equipment for conveying long strips of profiles to the cutting machine. Since the cutting machine is set to a single-tube input cutting processing mode, this set of feeding equipment is required to output the profiles one by one when the profiles are finally output. This set of feeding equipment includes a storage device 1, a loading device 2 and a feeding device 3 arranged in sequence along the front-to-back direction, wherein the storage device 1 is used to store long strips of profiles and can feed long strips of profiles into the loading device 2 in batches, and the feeding device 3 includes a push plate 31 and a guide trough 32, and the push plate 31 can be used to convey a single long strip of profile to the cutting machine along the axial direction of the profile. The rear end of the loading device 2 is connected to the storage device 1 and can receive the long profiles and allow the long profiles to be placed horizontally along the left and right directions of the loading device 2. The loading device 2 is mainly used to transport the long profiles horizontally from the rear end to the front end, and to arrange the batches of profiles in sequence one by one during the horizontal transportation of the profiles. The front end of the loading device 2 is connected to the feeding device 3 and can allow the long profiles arranged in sequence to be placed one by one into the guide trough 32 of the feeding device 3.

[0029] In order to enable the feeding device 2 to realize the horizontal feeding function, the feeding device 2 includes a frame 21 and at least two feeding belts 4 extending horizontally in the front-to-back direction arranged at intervals on the frame 21. The frame 21 is a basic supporting component of the feeding device 2. The feeding belts 4 and the profiles placed on the feeding belts 4 rely on the frame 21 to provide stable support. Since the length specifications of long profiles are mostly 4 meters, 6 meters, 8 meters or 12 meters, the left and right extension lengths of the machine 21 are also matched with the long profiles. Figure 1 As shown, the five feeding belts 4 are arranged on the frame 21 at intervals along the left-right direction, and the extension direction of each feeding belt 4 is basically perpendicular to the axial extension direction of the long profile. The loading device 2 also includes a driver 5, which is used to drive the feeding belt 4 to rotate along the front and rear directions. The feeding belt 4 rotates and can move the long profile placed on its top support surface horizontally forward.

[0030] In order to enable multiple feeding belts 4 to rotate synchronously, a further technical solution may be that the feeding belt 4 is a chain belt and is driven to move by a pair of driving sprockets 42 and driven sprockets 43, and also includes a main drive shaft 44 that is rotated and arranged on the frame 21, and the driving sprockets 42 of all feeding belts 4 are connected to the main drive shaft 44, and the driver 5 is connected to the main drive shaft 44 and drives all the feeding belts 4 to rotate synchronously through the main drive shaft 44. Among them, the specific implementation of the driver 5 being connected to the main drive shaft 44 includes at least the following three types, the first is that the main drive shaft 44 is directly connected to the output shaft of the driver 5; the second is that the output shaft of the driver 5 and the main drive shaft 44 are provided with matching gears, and the two are connected by gear transmission; the third is that the output shaft of the driver 5 and the main drive shaft 44 are provided with pulleys, and the driver 5 and the main drive shaft 44 form a transmission link through a chain or belt. As Figure 1 and Figure 2 As shown, the middle lower space of the frame 21 can be used to place the driver 5, and the main drive shaft 44 is driven to rotate by a chain or belt. The transmission structure arranged in this way saves space for installing the driver 5 and allows the main drive shaft 44 to rotate smoothly.

[0031] The usual feeding belt 4 uses nylon cloth belts or iron mesh as components to support the long strips of profiles, but the surface of the nylon cloth belt is relatively smooth and is prone to slipping when conveying the long strips of profiles, while the iron mesh may scratch the surface of the long strips of profiles. In order to better drive the long strips of profiles to move laterally, the feeding belt 4 includes a metal meshing portion 45 that meshes with the sprocket and a non-metallic support portion 46 connected to the side or top of the metal meshing portion 45. The upper surface of the non-metallic support portion 46 constitutes the top support surface of the supporting profile, and the upper surface of the non-metallic support portion 46 is higher than the upper surface of the metal meshing portion 45. The metal meshing portion 45 is a roller chain structure, and the roller chain cooperates with the driving sprocket 42 and the driven sprocket 43 to have good rotation synchronization, while the non-metallic support portion 46 is mainly used to support the profile and move the profile forward laterally, such as Figure 3 and Figure 4 As shown, the non-metallic support portion 46 is a plastic roller mounted on a roller shaft extending from one side of the metal meshing portion 45. The plastic rollers are arranged at equal intervals along the metal meshing portion 45, and the upper surface of the plastic rollers used to support the long profile is higher than the upper surface of the metal meshing portion 45. In this way, the multiple feed belts 4 can rotate synchronously and the long profile can be moved forward while minimizing scratches on the profile.

[0032] The long profiles delivered in batches from the storage device 1 are often stacked together. In order to improve the degree of automation of loading and reduce manual operations, the stacked profiles can be untied by taking advantage of the fact that the friction between the stacked profiles is less than the friction between the profiles and the feeding belt 4. Figures 1 to 6 As shown, a further technical solution may be that the feeding device 2 also includes a controller (not shown) and a driver 5 and a sensor 6 whose signals are connected to the controller, the driver 5 is used to drive the feeding belt 4 to rotate forward and reverse under the control of the controller, and the sensor 6 is arranged above the feeding belt 4, wherein the vertical distance between the top support surface of the sensor 6 and the feeding belt 4 is generally set to be slightly larger than the diameter of a single profile and less than twice the diameter of the profile; the sensor 6 is used to detect the stacked profiles passing below it and provide the corresponding detection signal to the controller, and the controller is arranged to immediately drive the feeding belt 4 to rotate in the opposite direction by a threshold step when the feeding belt 4 moves forward horizontally with the profile and receives the detection signal. In a specific implementation, the feed belt 4 rotates in the opposite direction by a threshold step, which means that the feed belt 4 rotates in the opposite direction and then rotates forward and can untie the stacked state of the long profiles. The long profiles rotate in the opposite direction for this distance value under the drive of the feed belt 4 and then resume forward rotation in order to allow the long profiles to rotate forward as a whole. Since the friction between the profiles is generally smaller than the friction between the profiles and the feed belt 4, the profiles stacked on top will generate an inertial force to maintain the original moving direction when moving and changing direction. With the help of this inertial force, the profiles stacked on top can slide onto the feed belt 4, thereby untying the stacked state of the two long profiles.

[0033] Since the number of the feeder belts 4 and sensors 6 is limited, especially since there is generally a large gap between two adjacent feeder belts 4, the long profiles (especially the pipes with smaller diameters) placed on the feeder belts 4 are likely to be in a wavy and uneven state due to their own deformation problems. This state will not only cause the profiles to collide with the rack 21 or the attached profiles when moving horizontally, but may also cause the sensor 6 to be unable to detect stacked profiles due to the falling of the profiles, or the sensor 6 may mistakenly think that stacked profiles have been detected due to the local protrusion of a single profile. In order to solve this type of problem, a further technical solution may be to provide at least one auxiliary smooth rail 7 on the rack 21, and the auxiliary smooth rail 7 extends horizontally and is arranged on the side of the feeder belt 4; such as Figures 1 to 6As shown, the auxiliary smooth rail 7 is fixedly provided on the frame 21 and extends horizontally in the forward direction, and is basically arranged in parallel with the feeding belt 4, and the top support surface of the auxiliary smooth rail 7 is basically flush with the top support surface of the feeding belt 4 for jointly supporting the profile. In this way, by providing one or more auxiliary smooth rails 7, auxiliary support can be effectively provided for the long profile, and good support can also be provided for the profile during the movement of the profile, so that the long profile can move laterally in a straight posture. On the other hand, the auxiliary smooth rail 7 can provide further friction force for the profile while providing support for the long profile, which is conducive to separating the profile from the profile stacked on it when turning and moving. At the same time, the friction force provided by the auxiliary smooth rail 7 to the profile can also cause the profile to roll to a certain extent, which is more conducive to separating the twisted and stacked profiles.

[0034] In order to protect the surface of the profile, a further technical solution may be that the auxiliary smooth rail 7 includes a metal support body 71 and a non-metallic surface layer 72 applied on the metal support body, and the top surface of the non-metallic surface layer 72 forms the top support surface of the auxiliary smooth rail 7. The non-metallic surface layer is generally made of plastic or other materials with a hardness lower than that of metal, which helps to reduce scratches on the profile by the top surface of the non-metallic surface layer and is more conducive to protecting the surface of the profile.

[0035] In order to protect the profile and increase the service life of the sensor 6, a further technical solution may be that the sensor 6 is a travel switch 62 including a touch arm 61 and a switch 62, the touch arm 61 is used to detect the stacked profile passing below it by touch and transmit the collision signal to the switch 62, and the switch 62 signal is connected to the controller. Figures 1 to 6 As shown, the touch arm 61 is set on the fixed plate above the feeding belt 4 so as to be able to swing back and forth through a rotating shaft. The switch 62 is set on one side of the touch arm 61. The touch arm 61 extends downward to a position greater than one profile diameter and less than two profile diameters from the top support surface of the feeding belt 4. When the stacked profiles pass under the sensor 6, the profiles stacked on top can touch and push the touch arm 61 to swing. When the touch arm 61 swings, it triggers the switch 62, thereby transmitting the collision signal to the switch 62. Among them, the switch 62 is a non-contact inductive switch, because the use of a non-contact inductive switch does not require contact with the touch arm 61, which is more conducive to the service life of the sensor 6.

[0036] In order to adapt to profiles of different diameters, a further technical solution may be to further include a limit frame 8, which is arranged above the feed belt 4 and can adjust its height relative to the feed belt 4. The sensor 6 is arranged on the limit frame 8 so that the position height of the sensor 6 relative to the feed belt 4 can be adjusted. Figure 2 and Figure 6 As shown, the limiting frame 8 includes a left and right horizontal frame 81 and a lifting rod 82 arranged on both sides of the frame 81. The sensor 6 is fixedly installed on the frame 81. Driven by the lifting rod 82, the frame 81 moves up and down with the sensor 6.

[0037] In order to allow the profiles to be arranged one by one in sequence after passing through the sensor 6, a further technical solution may also include a first inclined slide rail 83 arranged on the frame 21 and a limit rod 84 arranged above the first inclined slide rail 83. The first inclined slide rail 83 and the limit rod 84 are combined to form a downward-inclined storage chamber 80. The front end of the storage chamber 80 is connected to the downstream of the feeding belt 4 or the auxiliary smooth rail 7 so that it can receive the profiles output from the feeding belt 4. The limit rod 84 is detachably connected to the limit frame 8 so that the height of the storage chamber 80 can be adjusted. The storage cavity 80 refers to the space between the first inclined rails 83 and the limiting rods 84. The feed belt 4 transports the profiles to the storage cavity 80. Under the weight of the profiles, they slide along the first inclined rails 83 to the bottom of the storage cavity 80. By adjusting the height of the storage cavity 80 to be slightly larger than the diameter of a single profile, the profiles can be neatly arranged one by one in the storage cavity 80. Furthermore, in order to ensure that the profiles entering the storage cavity 80 can maintain a flat posture, an auxiliary inclined rail 85 is provided between the two first inclined rails 83. The upper support surface of the auxiliary inclined rail 85 is substantially flush with the upper support surface of the first inclined rails 83.

[0038] In order to facilitate the conveying of the long profiles stored in the storage device 1 to the feeding belt 4, as shown in FIG. Figure 1 and Figure 7As shown, the storage device 1 includes a material rack 11, a pulley shaft 15 provided on the material rack 11, a motor 13, a take-up pulley 12, and a lifting belt 14. All the take-up pulleys 12 are transmission-connected to the pulley shaft 15. One end of the lifting belt 14 is connected to the material rack 11 and the other end is connected to the take-up pulley 12. The motor 13 drives the take-up pulley 12 to rotate forward or reverse through the pulley shaft 15, thereby tightening or loosening the lifting belt 14. When the lifting belt 14 is tightened, the lifting belt 14 can lift the long profile stored on the material rack 11 and allow the long profile to be transported to the feeding belt 4. Furthermore, in order to more accurately control the lifting and lowering height of the lifting belt 14, a rotation positioning device connected to the pulley shaft 15 is also included. The rotation positioning device includes an adjustment seat 16, a screw 17 connected to the pulley shaft 15, and a nut 18 sleeved on the screw 17. The adjustment seat 16 is provided with a slide groove 161, and the nut 18 is provided with a positioning arm 181 passing through the slide groove 161. A first positioning switch 19a whose signal is connected to the controller is provided at one end of the slide groove 161, and a second positioning switch 19b whose signal is connected to the controller is provided at the other end. When the second positioning switch 19b is triggered by the positioning arm 181, a stop signal is sent to the controller. After receiving the stop signal, the controller stops the motor 13, thereby stopping the take-up pulley 12 and allowing the long profile on the lifting belt 14 to move onto the feeding belt 4; then the controller controls the motor 13 to reverse, thereby driving the take-up pulley 12 to rotate in the opposite direction, so that the lifting belt 14 and the long profile are lowered. At the same time, the screw 17 is also driven by the pulley shaft 15 to rotate in the opposite direction and drive the nut 18 to move along the slide groove 161 toward the second positioning switch 19b. When the second positioning switch 19b is triggered by the positioning arm 181, a stop signal is sent to the controller. After receiving the stop signal, the controller stops the motor 13, thereby allowing the lifting belt 14 to descend to the specified height.

Claims

1. An improved loading device for horizontally conveying long strips of profiles, comprising a frame, at least two feed belts spaced apart and extending horizontally in a front-to-rear direction on the frame, the feed belts being rotatable so as to carry the long strips of profiles placed on their top support surfaces horizontally forward; characterized in that: At least one auxiliary smooth rail is further provided on the frame, and the auxiliary smooth rail is horizontally extended and arranged on the side of the feeding belt, and the top supporting surface of the auxiliary smooth rail is substantially flush with the top supporting surface of the feeding belt for jointly supporting the profiles; the friction between the stacked profiles is less than the friction between the profiles and the feeding belt; It also includes a controller and a driver and a sensor connected to the controller by signal, wherein the driver is used to drive the feed belt to rotate forward and reverse under the control of the controller, and the sensor is arranged above the feed belt. The sensor is used to detect the stacked profiles passing below it and provide the corresponding detection signal to the controller. The controller is arranged to immediately drive the feed belt to rotate in the opposite direction by a threshold step when the feed belt moves horizontally with the profiles and receives the detection signal.

2. The feeding device according to claim 1, characterized in that: The feeding belt is a chain belt and is driven to move by a pair of driving sprockets and a driven sprocket. It also includes a main driving shaft rotatably arranged on the frame. The driving sprockets of all feeding belts are transmission-connected to the main driving shaft. The driver is transmission-connected to the main driving shaft and drives all the feeding belts to rotate synchronously through the main driving shaft. The feeding belt includes a metal meshing portion meshing with the driving sprocket and the driven sprocket and a non-metallic supporting portion connected to the side or top of the metal meshing portion. The upper surface of the non-metallic supporting portion constitutes the top supporting surface of the supporting profile, and the upper surface of the non-metallic supporting portion is higher than the upper surface of the metal meshing portion.

3. The feeding device according to claim 1, characterized in that: It also includes a limiting frame, which is arranged above the feeding belt and can adjust the height relative to the feeding belt. The sensor is arranged on the limiting frame so that the position height of the sensor relative to the feeding belt can be adjusted.

4. The feeding device according to claim 3, characterized in that: It also includes a first inclined slide rail arranged on the frame and a limit rod arranged above the first inclined slide rail. The first inclined slide rail and the limit rod are combined to form a downward-sloping storage cavity. The front end of the storage cavity is connected to the downstream of the feeding belt or the auxiliary smooth rail so that it can receive the profiles output from the feeding belt. The limit rod is detachably connected to the limit frame so that the height of the storage cavity can be adjusted.

5. The feeding device according to any one of claims 1 to 4, characterized in that: The sensor is a travel switch including a touch arm and a switch. The touch arm is used to detect the stacked profiles passing below it in a touch manner and transmit a collision signal to the switch. The switch signal is connected to the controller.

6. The feeding device according to any one of claims 1 to 4, characterized in that: The auxiliary smooth rail includes a metal support body and a non-metal surface layer laid on the metal support body, and the top end surface of the non-metal surface layer forms the top end support surface of the auxiliary smooth rail.

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