Flexible fall-prevention jig for different sizes of reconstituted wood

Abstract

The present application provides a kind of flexible anti-falling clamp for different size reconstituted wood, including rack, hydraulic control system, anti-falling system and clamping system;The top of rack is provided with connecting flange for connecting hoisting equipment, the bottom of rack is connected with clamping system;Clamping system includes first clamping plate, second clamping plate and third clamping plate;First clamping plate and second clamping plate are arranged side by side, can be driven to relative horizontal motion by hydraulic control system, to clamp or release the adjacent two sides of reconstituted wood;Third clamping plate is rotatably connected with second clamping plate, can be rotated under the drive of hydraulic control system, to support the bottom of reconstituted wood;Anti-falling system includes horizontal locking device and rotating locking device, horizontal locking device is used to lock the horizontal position after first clamping plate and second clamping plate are clamped in place, rotating locking device is used to lock the rotation angle after third clamping plate is rotated to support position;Guarantee the stability of clamping and operation safety.

Description

Technical Field

[0001] This invention belongs to the technical field of wood processing equipment, specifically relating to a flexible anti-fall clamp for reconstituted wood of different sizes. Background Technology

[0002] As a high-performance engineered wood material, reconstituted wood is widely used in furniture manufacturing, building components (such as beams and columns), interior decoration, and wood product processing due to its excellent physical and mechanical properties and environmental characteristics. In the production process of reconstituted wood, the demolded reconstituted wood blanks are usually regular square cross-section long pieces, which need to be smoothly transferred from the demolding station to the curing area, processing area, or for assembly and stacking.

[0003] However, there are significant technical challenges and efficiency bottlenecks in the current operations of grasping, transporting, and stacking reconstituted wood blanks laid flat on the ground after demolding: Surface and edge damage issues: Reconstituted wood blanks are of high value, and their surface smoothness and edge integrity directly affect the quality of the final product. If traditional rigid clamps (such as mechanical claws, electromagnetic chucks, etc.) are used for gripping and moving, the curved structure of the clamps can easily leave indentations and scratches on the surface of the blanks, or cause edge damage due to rigid collisions during transportation, resulting in irreversible quality defects, increasing the scrap rate and subsequent repair costs.

[0004] To address surface damage issues, flexible bag-type clamps, which are wrapped in rubber or fabric, have been used in some scenarios. These clamps effectively protect the surface and edges of reconstituted wood from hard impacts through their enveloping contact. However, bag-type clamps still suffer from two inherent drawbacks: difficulty in assembling and stacking blanks, and limitations in off-ground operation. After gripping the blank, the enveloping shape of the bag-type clamp results in a large and bulky clamp, making it difficult to achieve tight and precise stacking (blanket assembly and stacking), severely impacting space utilization and stacking stability. Furthermore, bag-type clamps typically require sufficient clearance at the bottom of the reconstituted wood (i.e., off the ground) so that the clamp's enveloping structure can be inserted from the bottom or side. For reconstituted wood blanks laid flat on the ground, bag-type clamps cannot directly and stably hold them, requiring additional steps (such as manually prying up the padding blocks) to create this clearance, greatly limiting their applicability and efficiency.

[0005] Due to the limitations of the aforementioned clamps, current reconstituted wood production lines generally rely on overhead cranes and ropes for hoisting and transporting materials. While this method avoids direct contact damage to the surface of the blanks, the operation is cumbersome and inefficient. Before each hoisting, hoisting ropes or straps must be carefully installed and secured manually at both ends or specific locations on the blank, consuming a significant amount of manpower. After being hoisted to the target stacking area, the posture and positioning accuracy of the blanks are difficult to control precisely, often requiring multiple fine-tunings or even manual assistance to complete the stacking. The entire hoisting process is slow and lacks automation, severely restricting the production line's turnover speed and increasing labor costs and operational safety risks.

[0006] Therefore, there is an urgent need to develop a new type of clamping device that can directly and reliably pick up flat reconstituted wood blanks from the ground, effectively protect their surface and edges from damage, have good adaptability (suitable for blanks of different sizes) and anti-drop capability, and support efficient subsequent transfer and precise stacking operations, so as to break through the current production bottleneck and improve the level of automation and economic benefits. Summary of the Invention

[0007] This invention provides a flexible anti-fall clamp for reconstituted wood of different sizes, which solves the problems of rigid clamps that easily damage workpieces, bag clamps that are difficult to stack and require operation off the ground, and overhead cranes that have low hoisting efficiency in the prior art.

[0008] This invention provides a flexible anti-fall clamp for reconstituted wood of different sizes, including a frame, a hydraulic control system, an anti-fall system, and a clamping system; The top of the frame is equipped with a connecting flange for connecting the lifting equipment, and the bottom of the frame is connected to the clamping system; The clamping system includes a first clamping plate, a second clamping plate, and a third clamping plate; The first and second clamping plates are arranged side by side and can move relatively horizontally under the drive of the hydraulic control system to clamp or release the adjacent sides of the reconstituted wood; the third clamping plate is rotatably connected to the second clamping plate and can rotate under the drive of the hydraulic control system to support the bottom of the reconstituted wood. The anti-fall system includes a horizontal locking device and a rotary locking device. The horizontal locking device is used to lock the horizontal position of the first and second clamping plates after they are clamped in place, and the rotary locking device is used to lock the rotation angle of the third clamping plate after it is rotated to the support position.

[0009] Compared with existing technologies, the advantages of this invention are as follows: It employs a three-ply composite motion structure, where the first and second plywood plates provide stable horizontal clamping, and the third plywood plate effectively supports the bottom of the reconstituted wood through rotational motion. This not only reliably grips flat reconstituted wood blanks directly from the ground, adapting to workpieces of different sizes, but also completely solves the technical problems of traditional rigid clamps easily damaging workpiece surfaces and edges, and flexible bag-type clamps being difficult to stack and requiring operation off the ground. Furthermore, by incorporating a horizontal locking device and a rotary locking device, this clamp forms a dual anti-fall protection mechanism combining hydraulics and machinery, significantly improving the safety of the handling process and effectively eliminating the risk of workpieces falling due to system pressure loss or unexpected fluctuations. The overall structural design is reasonable, ensuring clamping stability and operational safety while greatly improving the automation level and operational efficiency of reconstituted wood transfer and stacking, reducing manual intervention and costs, and possessing significant engineering application value.

[0010] Furthermore, the frame includes a connecting plate and at least one sliding shaft, the sliding shaft being fixedly connected to a first clamping plate and / or a second clamping plate, the first clamping plate and / or the second clamping plate forming a sliding pair with the frame through the sliding shaft.

[0011] Furthermore, the hydraulic control system includes a first translation cylinder, a second translation cylinder, and a rotary cylinder; The first translation cylinder is fixedly connected to the first clamping plate via a connecting rod, the second translation cylinder is fixedly connected to the second clamping plate, the cylinder body of the rotary cylinder is hinged to the second clamping plate, and the piston rod of the rotary cylinder is hinged to the third clamping plate. The third clamping plate is rotatably connected to the second clamping plate by a hinge. The bottom of the third clamping plate is provided with a claw-like structure for hooking the reconstituted wood. When the rotary cylinder retracts, the third clamping plate rotates around the hinge in a direction away from the reconstituted wood. When the rotary cylinder extends, the third clamping plate rotates around the hinge until it forms the same plane as the second clamping plate, so as to hook the bottom of the reconstituted wood through the claw-like structure to form support.

[0012] Furthermore, the horizontal locking device is a hydraulic displacement brake, which is provided at the connection between the sliding shaft and the first clamping plate and / or the second clamping plate; when the first clamping plate and the second clamping plate are clamped in place, the braking end of the hydraulic displacement brake is tightly fitted with the outer wall of the sliding shaft to limit the relative movement between the sliding shaft and the clamping plate to lock the horizontal position.

[0013] Furthermore, the rotation locking device includes a mechanical limiting pin and limiting holes. The limiting holes are respectively opened at the hinge joint between the cylinder body of the rotary cylinder and the second clamping plate, and at the hinge joint between the piston rod of the rotary cylinder and the third clamping plate. The axes of the two limiting holes are collinear when the third clamping plate rotates to the supporting position. When the third clamping plate rotates to the supporting position under the drive of the rotary cylinder, the mechanical limiting pin is inserted into the limiting hole to lock the rotation angle of the third clamping plate and prevent it from rotating on its own.

[0014] Furthermore, the first translation cylinder, the second translation cylinder, and the rotary cylinder are all equipped with pressure sensors, which are used to detect the output pressure of each cylinder in real time. Furthermore, the pressure sensor is electrically connected to the hydraulic control system. When the pressure sensor detects that the pressure values ​​of the first and second translation cylinders have reached a preset threshold, the hydraulic control system stops pressurizing. The preset threshold is not less than twice the weight of the reconstituted wood.

[0015] Furthermore, the frame also includes bearing housings and connecting aluminum profiles; the connecting plate is fixedly connected to the bearing housings via the connecting aluminum profiles; The sliding shaft passes through the bearing housing and forms a sliding fit with the bearing housing.

[0016] Furthermore, the surfaces of the first, second, and third plywood that come into contact with the reconstituted wood are all equipped with replaceable rubber pads.

[0017] Furthermore, the hydraulic displacement brake has an independent hydraulic system, and its braking end head is made of arc-shaped NBR oil-resistant rubber material. Attached Figure Description

[0018] Figure 1 This is an elevation view of a flexible anti-fall clamp according to an embodiment of the present invention; Figure 2 This is a left view of a flexible anti-fall clamp in one embodiment of the present invention; Figure 3 This is a top view of a flexible anti-fall clamp according to an embodiment of the present invention; Figure 4 This is a bottom view of a flexible anti-fall clamp according to an embodiment of the present invention; Figure 5 This is an isometric view of a flexible anti-fall clamp according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. First clamping plate; 2. Second clamping plate; 3. Third clamping plate; 4. Hinge; 5. Rotary cylinder; 6. Sliding shaft; 7. Connecting aluminum profile; 8. Connecting flange; 9. Bearing seat; 10. First pad; 11. Second pad; 12. Connecting plate; 13. Connecting rod; 14. First translation cylinder; 15. Second translation cylinder; 16. Hydraulic displacement brake; 17. Mechanical limit pin. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "horizontal," and "vertical," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] Please see Figures 1-5 This embodiment provides a flexible anti-fall clamp for reconstituted wood of different sizes, which mainly includes a frame, a hydraulic control system, an anti-fall system, and a clamping system.

[0023] The frame serves as the supporting structure for the entire fixture, and its top is equipped with a connecting flange 8 for reliable connection to lifting equipment such as overhead cranes. The bottom of the connecting flange 8 is bolted to a connecting plate 12. The bottom of the connecting plate 12 is fixedly connected to two bearing seats 9 via connecting aluminum profiles 7. Two sliding shafts 6 are parallel to each other and pass through the bearing seats 9, allowing them to slide horizontally relative to the bearing seats 9, thus forming the main load-bearing and guiding structure of the fixture.

[0024] The clamping system includes a first clamping plate 1, a second clamping plate 2, and a third clamping plate 3. The first clamping plate 1 and the second clamping plate 2 are arranged side by side and are both fixedly connected to the sliding shaft 6, so that they can move horizontally together with the sliding shaft 6. The third clamping plate 3 is rotatably connected to the lower edge of the second clamping plate 2 via a hinge 4, so that the third clamping plate 3 can rotate relative to the second clamping plate 2 in a vertical plane.

[0025] Specifically, an inwardly curved claw-like structure is provided at the bottom of the third plywood 3 to better hook onto the bottom of the reconstituted wood when supported. Replaceable natural rubber pads are bolted to the inner surfaces of the first plywood 1, the second plywood 2, and the third plywood 3 that come into contact with the reconstituted wood to increase friction and effectively protect the surface and edges of the reconstituted wood from damage.

[0026] The hydraulic control system provides power for the movement of the clamps. The hydraulic control system includes a first translation cylinder 14, a second translation cylinder 15, and a rotary cylinder 5. The cylinder body of the first translation cylinder 14 is fixed to the frame, and its piston rod is fixedly connected to the first clamping plate 1 via a connecting rod 13. A first pad 10 and a second pad 11 are respectively provided at the connection points between the connecting rod 13 and the first clamping plate 1 and the first translation cylinder 14. The cylinder body of the second translation cylinder 15 is also fixed to the frame, and its piston rod is fixedly connected to the second clamping plate 2. By controlling the extension and retraction of the first translation cylinder 14 and the second translation cylinder 15, the first clamping plate 1 and the second clamping plate 2 can be driven to move towards or away from each other, thereby achieving adaptive clamping and release of reconstituted wood of different widths. The cylinder body of the rotary cylinder 5 is connected to the second clamping plate 2 via a hinged seat, and its piston rod is hinged to the third clamping plate 3. When the rotary cylinder 5 retracts, it pulls the third clamping plate 3 to rotate around the hinge 4 away from the reconstituted wood and retract. When the rotary cylinder 5 extends, it pushes the third clamping plate 3 to rotate until it is almost on the same plane as the second clamping plate 2, so that the claw-like structure at its bottom can reach into the bottom of the reconstituted wood and hold it. The first translation cylinder 14, the second translation cylinder 15, and the rotary cylinder 5 are all equipped with pressure sensors to detect the output pressure of each cylinder in real time.

[0027] The anti-fall system provides dual safety protection, including a horizontal locking device and a rotary locking device. The horizontal locking device is a hydraulic displacement brake 16, mounted on the frame and located beside the sliding shaft 6. When the first clamping plate 1 and the second clamping plate 2 clamp the reconstituted wood into position under the drive of the hydraulic cylinder, and the pressure sensor detects that the pressure reaches a preset value (not less than twice the weight of the reconstituted wood), the hydraulic control system stops pressurizing. Immediately, the hydraulic displacement brake 16 actuates, and the arc-shaped NBR oil-resistant rubber block at its braking end presses downwards against the outer wall of the sliding shaft 6 under the drive of an independent hydraulic source, generating a huge frictional force, thereby locking the sliding shaft 6. Even if the first translation cylinder 14 or the second translation cylinder 15 accidentally loses pressure, the clamping plates cannot move backward, effectively preventing the reconstituted wood from loosening in the horizontal direction. The rotary locking device consists of a mechanical limiting pin 17 and a limiting hole. The limiting holes are precisely drilled on the cylinder hinge seat of the rotary cylinder 5 and the second clamping plate 2 (or a similar stable structure). When the third clamping plate 3 is rotated to the fully supported position by the rotary cylinder 5, the axes of the two limiting holes are exactly collinear. At this time, the operator inserts the mechanical limiting pin 17 into the collinear limiting hole to form a purely mechanical lock. This device ensures that even if the rotary cylinder 5 completely fails, the third clamping plate 3 can be reliably fixed in the working position, preventing the reconstituted wood from falling vertically.

[0028] The working process of this invention is as follows: Initially, the third clamping plate 3 is in the retracted state. The clamp is lifted by the lifting equipment onto the reconstituted wood blank lying flat on the ground and lowered, positioning the reconstituted wood between the first clamping plate 1 and the second clamping plate 2. The first translation cylinder 14 and the second translation cylinder 15 are activated, driving the first clamping plate 1 and the second clamping plate 2 to move towards each other until the reconstituted wood is clamped from both sides. When the pressure value fed back by the pressure sensor reaches the preset threshold, the cylinder stops moving. Immediately afterwards, the hydraulic displacement brake 16 is activated, locking the sliding shaft 6. Subsequently, the lifting equipment lifts the clamp and the reconstituted wood, making it completely off the ground. After the reconstituted wood is off the ground, the rotation cylinder 5 is activated, pushing the third clamping plate 3 to rotate to the horizontal bottom position, and then the mechanical limit pin 17 is manually inserted to complete the vertical locking. At this point, the clamp has completed the stable gripping of the reconstituted wood, which can be safely transported. After reaching the target position, perform the above operations in reverse order: first pull out the mechanical limit pin 17, then rotate the cylinder 5 to retract and retract the third clamping plate 3, then release the hydraulic displacement brake 16, and finally retract the horizontal cylinder to release the reconstituted wood.

[0029] The clamp has a compact, thin-plate structure at both ends and can be easily moved after release, allowing the reconstituted wood to be placed very close to the final stacking state. This minimizes the need for manual intervention in subsequent stacking adjustments, significantly improving overall work efficiency and safety.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should all be considered to be within the protection scope of the present invention.

Claims

1. A flexible anti-fall clamp for reconstituted wood of different sizes, characterized in that, The system includes a frame, a hydraulic control system, a fall arrest system, and a clamping system. The top of the frame has a connecting flange for connecting lifting equipment, and the bottom of the frame is connected to the clamping system. The clamping system includes a first clamping plate, a second clamping plate, and a third clamping plate. The first and second clamping plates are arranged side-by-side and can move relatively horizontally under the drive of the hydraulic control system to clamp or release adjacent sides of the reconstituted wood. The third clamping plate is rotatably connected to the second clamping plate and can rotate under the drive of the hydraulic control system to support the bottom of the reconstituted wood. The fall arrest system includes a horizontal locking device and a rotation locking device. The horizontal locking device locks the first and second clamping plates in their horizontal position after they are clamped in place, and the rotation locking device locks the rotation angle of the third clamping plate after it rotates to the support position. The frame includes a connecting plate and at least one sliding shaft, the sliding shaft being fixedly connected to a first clamping plate and / or a second clamping plate, the first clamping plate and / or the second clamping plate forming a sliding pair with the frame through the sliding shaft; The hydraulic control system includes a first translation cylinder, a second translation cylinder, and a rotary cylinder; The first translation cylinder is fixedly connected to the first clamping plate via a connecting rod, the second translation cylinder is fixedly connected to the second clamping plate, the cylinder body of the rotary cylinder is hinged to the second clamping plate, and the piston rod of the rotary cylinder is hinged to the third clamping plate; the third clamping plate is rotatably connected to the second clamping plate via a hinge, and the bottom of the third clamping plate is provided with a claw-like structure for hooking the reconstituted wood; when the rotary cylinder retracts, the third clamping plate rotates around the hinge in a direction away from the reconstituted wood; when the rotary cylinder extends, the third clamping plate rotates around the hinge until it forms the same plane as the second clamping plate, so as to hook the bottom of the reconstituted wood through the claw-like structure to form support; The horizontal locking device is a hydraulic displacement brake, which is provided at the connection between the sliding shaft and the first clamping plate and / or the second clamping plate. When the first clamping plate and the second clamping plate are clamped in place, the braking end of the hydraulic displacement brake is tightly fitted with the outer wall of the sliding shaft to limit the relative movement between the sliding shaft and the clamping plate and lock it in a horizontal position. The rotation locking device includes a mechanical limit pin and limit holes. The limit holes are respectively opened at the hinge part between the cylinder body of the rotary cylinder and the second clamping plate, and at the hinge part between the piston rod of the rotary cylinder and the third clamping plate. The axes of the two limit holes are collinear when the third clamping plate rotates to the support position. When the third clamping plate rotates to the support position under the drive of the rotary cylinder, the mechanical limit pin is inserted into the limit hole to lock the rotation angle of the third clamping plate and prevent it from rotating on its own.

2. The flexible anti-fall clamp for reconstituted wood of different sizes according to claim 1, characterized in that, The first translation cylinder, the second translation cylinder, and the rotary cylinder are all equipped with pressure sensors, which are used to detect the output pressure of each cylinder in real time.

3. The flexible anti-fall clamp for reconstituted wood of different sizes according to claim 2, characterized in that, The pressure sensor is electrically connected to the hydraulic control system. When the pressure sensor detects that the pressure values ​​of the first and second translation cylinders have reached a preset threshold, the hydraulic control system stops pressurizing. The preset threshold is not less than twice the weight of the reconstituted wood.

4. The flexible anti-fall clamp for reconstituted wood of different sizes according to claim 1, characterized in that, The frame also includes bearing housings and connecting aluminum profiles; the connecting plate is fixedly connected to the bearing housings via the connecting aluminum profiles; the sliding shaft passes through the bearing housings and forms a sliding fit with the bearing housings.

5. The flexible anti-fall clamp for reconstituted wood of different sizes according to claim 1, characterized in that, The surfaces of the first, second, and third plywood that come into contact with the reconstituted wood are all equipped with replaceable rubber pads.

6. The flexible anti-fall clamp for reconstituted wood of different sizes according to claim 1, characterized in that, The hydraulic displacement brake has an independent hydraulic system, and its braking end head is made of arc-shaped NBR oil-resistant rubber material.

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