A wood pallet centering device

Abstract

The present invention discloses a wood pallet centering device. The wood pallet centering device detects the moving distance of the front end of the iron slide plate through the iron slide plate stroke detection device, and detects the triggering timing of the front end face of the wood pallet through the wood pallet position detection device, so that the coil packaging control system automatically calculates the placement error of the iron slide plate in the front-rear direction, and makes the iron slide plate drive the wood pallet to accurately stay at the palletizing station; and the wood pallet is synchronously pushed by two push plate assemblies to further correct the left-right placement of the wood pallet, ensuring that the wood pallet accurately moves to the preset palletizing station.

Description

Technical Field

[0001] The present invention relates to the technical field of coil packaging, and particularly to a centering device for wooden pallets. Background Art

[0002] The coil is a cylindrical plastic film roll. After the coil is manufactured, it needs to be transported to various places for sale. In order to protect the integrity of the coil during transportation, reduce wear, and increase the transportation quantity, the coil needs to be suspended and packaged. Suspended packaging can be understood as first independently packaging a single coil, wrapping the surface of the coil with bubble film, then buckling the two ends with a paper cover and a foam pad, and fixing them with tape winding; then installing vertical clamping plates and plugs at both ends of the coil, and then bundling the two vertical clamping plates, so that the coil is suspended between the two vertical clamping plates. After the suspended packaging is completed, the film roll needs to be transported from the bundling station to the stacking station. There are wooden pallets placed at the stacking station, and several film rolls are stacked on the wooden pallets for the forklift to carry and ship.

[0003] Since the coils have multiple models, each model of suspended packaging coil needs to be carried by a specific wooden pallet. Now, a stacking conveyor line is designed to transport the wooden pallet corresponding to the coil model to the stacking station by using an iron skateboard. When the staff places the wooden pallet on the iron skateboard, due to the lack of a positioning mechanism on the iron skateboard, there will be a certain placement error when placing the wooden pallet, and it is impossible to accurately center the wooden pallet. Therefore, a centering device is developed to adjust the position of the wooden pallet to ensure that the wooden pallet accurately moves to the preset stacking station.

[0004] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0005] In view of the deficiencies of the above-mentioned existing technology, the purpose of the present invention is to provide a centering device for wooden pallets, aiming to adjust the position of the wooden pallet to ensure that the wooden pallet accurately moves to the preset stacking station.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A centering device for wooden pallets includes a wooden pallet position detection device and an iron skateboard travel detection device arranged at one end of the stacking station, and two push plate assemblies respectively arranged on both sides of the stacking station. The two push plate assemblies are used to synchronously push the wooden pallet to center the wooden pallet between the two push plate assemblies; the iron skateboard travel detection device is used to detect the moving distance of the iron skateboard after passing through the iron skateboard travel detection device; the wooden pallet position detection device is used to sense the end face of the wooden pallet closest to the stacking station. The wooden pallet position detection device, the iron skateboard travel detection device, and the push plate assembly are all electrically connected to the coil packaging control system.

[0008] As a further improvement of the above technical solution, the iron slide plate stroke detection device includes a first bracket, a touch pressure detection head arranged above the first bracket, and an elastic push rod assembly arranged on the top of the first bracket; the elastic push rod assembly is used to push the touch pressure detection head to touch the iron slide plate.

[0009] As a further improvement of the above technical solution, the touch pressure detection head includes a push wheel bracket, a push wheel, and a rotary encoder arranged above the push wheel. The axis of the push wheel is vertically arranged and rotatably connected to the push wheel bracket through a rotating shaft. The rotary encoder is transmission-connected to the rotating shaft on the push wheel.

[0010] As a further improvement of the above technical solution, the elastic push rod assembly includes a hollow sleeve, a push rod passing through the inner cavity of the sleeve, and a spring sleeved on the push rod. A stop block is provided at one end of the sleeve facing the push wheel bracket, one end of the push rod is fixedly connected to the push wheel bracket, and the other end is provided with a limit head for limiting the push rod from detaching from the sleeve; the spring is located between the stop block and the push wheel bracket.

[0011] As a further improvement of the above technical solution, the wooden pallet position detection device includes a group of through-beam sensors, and the transmitter and receiver of the through-beam sensors are respectively arranged on the left and right sides of the palletizing station.

[0012] As a further improvement of the above technical solution, the push plate assembly includes a second bracket, a slide slidably arranged on the second bracket, a push plate fixed on the slide, and a linear drive for driving the slide to move back and forth left and right, and the push plate extends laterally.

[0013] As a further improvement of the above technical solution, a guide rail extending in the left-right direction is arranged on the second bracket, and the bottom of the slide is slidably connected to the guide rail via a slider.

[0014] As a further improvement of the above technical solution, the wooden pallet position detection device and the iron slide stroke detection device are provided in two groups, one group of wooden pallet position detection device and the iron slide stroke detection device are arranged at the front end of the stacking station, and the other group of wooden pallet position detection device and the iron slide stroke detection device are arranged at the rear end of the stacking station.

[0015] Beneficial effects:

[0016] The wooden pallet centering device provided by the present invention detects the moving distance of the front end of the iron slide plate by the iron slide plate stroke detection device, and detects the triggering timing of the front end surface of the wooden pallet by the wooden pallet position detection device, so that the coil packaging control system automatically calculates the placement error of the iron slide plate in the front and rear directions, so that the iron slide plate drives the wooden pallet to accurately stay at the stacking station, and the wooden pallet is pushed synchronously by two pushing plate assemblies, so as to further correct the left and right placement of the wooden pallet, and ensure that the wooden pallet is accurately moved to the preset stacking station. Brief Description of the Drawings

[0017] Figure 1 This is a perspective view of the wooden pallet centering device provided by the present invention in cooperation with the palletizing conveyor line.

[0018] Figure 2 It is Figure 1 a partial enlarged view of area A in

[0019] Figure 3 a top view of the wooden pallet centering device.

[0020] Figure 4 a perspective view of the iron skid travel detection device.

[0021] Figure 5 a right view of the iron skid travel detection device.

[0022] Description of the main component symbols: 1 - wooden pallet position detection device, 11 - transmitter, 12 - receiver, 2 - iron skid travel detection device, 21 - first bracket, 22 - touch detection head, 221 - push wheel bracket, 222 - push wheel, 223 - rotary encoder, 23 - elastic push rod assembly, 231 - sleeve, 232 - push rod, 234 - spring, 235 - stop block, 236 - limit head, 3 - push plate assembly, 31 - second bracket, 32 - carriage, 33 - push plate, 34 - linear drive. Detailed Description of the Invention

[0023] The present invention provides a wooden pallet centering device. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further elaborates on the present invention with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0024] In this article, "front" refers to Figure 1 the direction in which the iron skid moves towards the palletizing station in

[0025] Please refer to Figures 1-5 , the present invention provides a wooden pallet centering device, including a wooden pallet position detection device 1 and an iron skid travel detection device 2 provided at one end of the palletizing station 4, and two push plate assemblies 3 respectively provided on both sides of the palletizing station 4. The two push plate assemblies 3 are used to synchronously push the wooden pallet 5 to make the wooden pallet 5 centered between the two push plate assemblies 3; the iron skid travel detection device 2 is used to detect the moving distance of the front end of the iron skid 6 after passing through the iron skid travel detection device 2; the wooden pallet position detection device 1 is used to sense the end face of the wooden pallet closest to the palletizing station. The wooden pallet position detection device 1, the iron skid travel detection device 2 and the push plate assembly 3 are all electrically connected to the coil packaging control system.

[0026] When in the non-palletizing state, several iron skids (4 iron skids are provided in this embodiment) are arranged on the palletizing conveyor line 7. Each iron skid is numbered, and an iron skid with one number corresponds to loading a specific type of wooden pallet. All iron skids are far from the palletizing station, that is, no iron skid 6 and wooden pallet 5 are placed at the palletizing station. When it is found that no wooden pallet is placed on an iron skid with a certain number, the staff immediately replenishes and places the corresponding type of wooden pallet 5 on the iron skid 6 with that number. That is, before palletizing, a corresponding type of wooden pallet 5 is manually placed on each numbered iron skid 6. The coil packaging control system can know the coil model to be palletized soon according to the upstream equipment of the wooden pallet centering device, and then know the iron skid and wooden pallet that need to be transported to the palletizing station. It can be understood that since the wooden pallet is manually placed on the iron skid, the wooden pallet is not accurately positioned at this time, and it is impossible to determine whether the wooden pallet is placed in the center, so there will generally be a placement error.

[0027] The following three situations will occur when considering the placement position of the wooden pallet in the front-back direction: First, set the length of the iron skid as a mm. If the wooden pallet 5 is just placed in the center of the iron skid 6 without placement error, the position of the front end face of the wooden pallet 5 at this time is the standard position, and the distance between the front end face of the wooden pallet 5 and the front edge of the iron skid 6 is s mm. The iron skid 6 carrying the wooden pallet 5 moves towards the palletizing station 4. When the iron skid travel detection device 2 senses the front end of the iron skid, the iron skid travel detection device 2 feeds back a signal to the coil packaging control system, records it as the first point, and the iron skid travel detection device 2 starts to monitor the moving travel of the iron skid in real time. As the iron skid continues to move forward, the wooden pallet position detection device 1 senses the front end face of the wooden pallet and feeds back a signal to the coil packaging control system, records it as the second point, and the coil packaging control system immediately obtains the moving travel △b1 of the iron skid during the time from the first point to the second point.

[0028] (1) If △b1 = s mm, it means that there is no placement error of the wooden pallet. After the palletizing conveyor line drives the iron skid to move forward (a - △b1) mm, the wooden pallet can accurately stop at the palletizing station. That is, the iron skid travel detection device 2 monitors the moving travel △b2 of the iron skid from the first point to the current position. When △b2 = a mm, it feeds back a signal to the coil packaging control system, and the coil packaging control system controls the palletizing conveyor line to stop moving.

[0029] (2) If △b1 < smm, it indicates that the wooden pallet has shifted forward after being placed on the iron skateboard. At this time, the position of the front end face of the wooden pallet is in front of the standard position. After the palletizing conveyor line drives the iron skateboard to move forward [(a - s) - (s - △b1)] mm, the wooden pallet can accurately stop at the palletizing station to compensate for the placement error. That is, the iron skateboard travel detection device 2 monitors the travel △b2 of the iron skateboard from the first point to the current position. When △b2 = (a - s + △b1) mm, a feedback signal is sent to the coil packaging control system, and the coil packaging control system controls the palletizing conveyor line to stop moving.

[0030] (3) If △b1 > smm, it indicates that the wooden pallet has shifted backward after being placed on the iron skateboard. At this time, the position of the front end face of the wooden pallet is behind the standard position. After the palletizing conveyor line drives the iron skateboard to move forward [(a - s) + (s - △b1)] mm, the wooden pallet can accurately stop at the palletizing station to compensate for the placement error. That is, the iron skateboard travel detection device 2 monitors the travel △b2 of the iron skateboard from the first point to the current position. When △b2 = (a + s - △b1) mm, a feedback signal is sent to the coil packaging control system, and the coil packaging control system controls the palletizing conveyor line to stop moving.

[0031] After the iron skateboard transports the wooden pallet to the palletizing station, the coil packaging control system controls the two pusher assemblies 3 to push the wooden pallet synchronously, so that the wooden pallet is centered between the two pusher assemblies 3, correcting the deviation of the wooden pallet in the left - right direction. The position of the wooden pallet after positioning is the same as the preset placement setting, assisting the upstream handling equipment to accurately place the suspended packaging film roll on the wooden pallet.

[0032] Specifically, the iron skateboard travel detection device 2 includes a first bracket 21, a touch - pressure detection head 22 arranged above the first bracket 21, and an elastic push - rod assembly 23 arranged at the top of the first bracket 21; the elastic push - rod assembly 23 is used to push the touch - pressure detection head 22 to touch - press the iron skateboard. In the normal state, the elastic push - rod assembly 23 provides an elastic thrust for the touch - pressure detection head 22, so that the touch - pressure detection head 22 extends and waits for the iron skateboard to trigger. When the front end of the iron skateboard passes through the touch - pressure detection head 22, the front end of the iron skateboard pushes the touch - pressure detection head 22 to retract, thereby triggering the touch - pressure detection head 22. The touch - pressure detection head 22 is always pressed against the side of the iron skateboard under the action of the elastic push - rod assembly 23 and monitors the travel of the iron skateboard in real time as the iron skateboard moves.

[0033] Furthermore, the touch pressure detection head 22 includes a push wheel bracket 221, a push wheel 222, and a rotary encoder 223 arranged above the push wheel 222. The axis of the push wheel 222 is arranged vertically and is rotatably connected to the push wheel bracket 221 through a rotating shaft, and the rotary encoder 223 is transmission-connected to the rotating shaft on the push wheel 222. The push wheel 222 is pressed against the side of the iron slide plate by the elastic push rod assembly 23, and under the action of friction, the push wheel 222 rotates with the movement of the iron slide plate. Since the rotating shaft rotates synchronously with the push wheel 222, the rotary encoder 223 can detect the angular displacement variable of the rotating shaft and the push wheel 222, so that the coil packaging control system can calculate the rotation amount of the push wheel 222 according to the circumference of the push wheel 222, and the rotation amount of the push wheel 222 is the travel distance of the iron slide plate.

[0034] Specifically, the elastic push rod assembly 23 includes a hollow sleeve 231, a push rod 232 passing through the inner cavity of the sleeve 231, and a spring 234 sleeved on the push rod 232. The sleeve 231 is provided with a stopper 235 at one end facing the push wheel bracket 221. One end of the push rod 232 is fixedly connected to the push wheel bracket 221, and the other end is provided with a limit head 236 for limiting the push rod 232 from being separated from the sleeve 231; the spring 234 is located between the stopper 235 and the push wheel bracket 221. Through such a configuration, the push wheel 222 can be compressed by the spring 234 to buffer the movement impact of the iron slide, and on the other hand, the elastic force of the spring 234 can ensure that the push wheel 222 is always pressed against the side of the iron slide, thereby ensuring the effectiveness of the iron slide stroke detection.

[0035] Preferably, the wooden pallet position detection device 1 includes a group of through-beam sensors, and the transmitter 11 and the receiver 12 of the through-beam sensor are respectively arranged on the left and right sides of the palletizing station. The transmitter 11 emits infrared light to the receiver 12. When the infrared light is blocked by the wooden pallet, it means that the through-beam sensor detects the front end of the wooden pallet.

[0036] Specifically, the push plate assembly 3 includes a second bracket 31, a slide 32 slidably disposed on the second bracket 31, a push plate 33 fixed on the slide 32, and a linear driver 34 for driving the slide 32 to move back and forth left and right, and the push plate 33 extends in the horizontal direction. The linear drivers 34 on the two push plate assemblies 3 move synchronously, and the two linear drivers 34 drive the corresponding push plates 33 to move toward the center of the stacking station, and the two push plates 33 push toward the side of the wooden pallet to correct the deviation of the wooden pallet in the left and right directions.

[0037] The linear drive 34 can be a cylinder, an electric push rod, a hydraulic push rod, a linear module, etc., and mainly plays the role of providing linear power.

[0038] Preferably, a guide rail (invisible in the figure) extending in the left-right direction is provided on the second support, and the bottom of the carriage is slidably connected to the guide rail through a slider. By providing the guide rail and the slider, the moving direction of the push plate 33 is ensured to be accurate, smooth and reliable.

[0039] In a preferred embodiment, two sets of the wooden pallet position detection device 1 and the iron slide plate stroke detection device 2 are provided. One set of the wooden pallet position detection device 1 and the iron slide plate stroke detection device 2 is provided at the front end of the palletizing station, and the other set of the wooden pallet position detection device 1 and the iron slide plate stroke detection device 2 is provided at the rear end of the palletizing station. Since before palletizing, the wooden pallets to be transported may be in front of or behind the palletizing station, whether the wooden pallets enter the palletizing station from the front or the rear of the palletizing station, there are the wooden pallet position detection device 1 and the iron slide plate stroke detection device 2 to detect the strokes of the wooden pallets and the iron slide plates, ensuring that the wooden pallets are accurately moved to the palletizing station.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should belong to the protection scope of the present invention.

Claims

1. A wood pallet centering device, characterized in that, It includes a wooden pallet position detection device and an iron slide stroke detection device arranged at one end of the palletizing station, and two groups of two push plate assemblies respectively arranged on both sides of the palletizing station, the two push plate assemblies are used to synchronously push the wooden pallet so that the wooden pallet is centered between the two push plate assemblies; the iron slide stroke detection device is used to detect the moving distance of the front end of the iron slide after passing through the iron slide stroke detection device; the wooden pallet position detection device is used to sense the end face of the wooden pallet closest to the palletizing station, and the wooden pallet position detection device, the iron slide stroke detection device and the push plate assembly are all electrically connected to the coil packaging control system; the iron slide stroke detection device includes a first bracket, a touch pressure detection head arranged above the first bracket, and an elastic push rod assembly arranged on the top of the first bracket; the elastic push rod assembly is used to push the touch pressure detection head to touch the iron slide; the wooden pallet position detection device includes a group of opposing beam sensors, and the transmitter and receiver of the opposing beam sensor are respectively arranged on the left and right sides of the palletizing station.

2. The wood pallet centering device according to claim 1, characterized in that, The touch pressure detection head includes a push wheel bracket, a push wheel, and a rotary encoder arranged above the push wheel. The axis of the push wheel is arranged vertically and is rotatably connected to the push wheel bracket through a rotating shaft. The rotary encoder is transmission-connected to the rotating shaft on the push wheel.

3. The wood pallet centering device according to claim 2, characterized in that, The elastic push rod assembly includes a hollow sleeve, a push rod passing through the inner cavity of the sleeve, and a spring sleeved on the push rod. A stopper is provided at one end of the sleeve facing the push wheel bracket. One end of the push rod is fixedly connected to the push wheel bracket, and the other end is provided with a limit head for limiting the push rod from detaching from the sleeve; the spring is located between the stopper and the push wheel bracket.

4. The centering device for wooden pallets according to claim 1, characterized in that, The push plate assembly comprises a second bracket, a slide slidably arranged on the second bracket, a push plate fixed on the slide, and a linear driver for driving the slide to move back and forth left and right, and the push plate extends in the transverse direction.

5. The wood pallet centering device according to claim 4, characterized in that, The second bracket is provided with a guide rail extending in the left-right direction, and the bottom of the slide bracket is slidably connected to the guide rail via a sliding block.

6. The wood pallet centering device according to any one of claims 1-3, characterized in that, The wooden pallet position detection device and the iron slide stroke detection device are provided in two groups, one group of wooden pallet position detection device and the iron slide stroke detection device is arranged at the front end of the stacking station, and the other group of wooden pallet position detection device and the iron slide stroke detection device is arranged at the rear end of the stacking station.

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