An automatic log production line

Abstract

The present invention provides an automatic log production line, comprising a first conveying assembly, the conveying end surface of which is provided with a plurality of gripping members for gripping wood; a sawing assembly; a second conveying assembly; a separation assembly, comprising a separation seat, a separation seat driving member, a first clamping mechanism, and an upper bark removal mechanism, wherein the first clamping mechanism is mounted on the separation seat and is used to clamp wood on the second conveying assembly; the separation seat is movable along the height direction of the machine body and in the separation direction; the separation seat driving member is used to drive the separation seat to move; the upper bark removal mechanism is disposed at the bottom end of the separation seat and is used to remove the upper bark; a third conveying assembly; and an edge cleaning assembly. The automatic log production line of the present invention can achieve sawing, upper and lower separation, and bark removal of logs.

Description

Technical Field

[0001] The present invention relates to the technical field of wood processing, in particular to an automatic log production line. Background Art

[0002] During lumber production, logs are typically cut and transported along conveyor lines to various workstations for debarking and board cutting. However, because logs are cut from top to bottom by multiple saw blades to form boards, and the logs are stacked from top to bottom after being cut, the logs have a circular surface, and the boards are formed into two semicircular arcs, with the bark remaining on the top, bottom, and left and right sides of the boards. Therefore, edge cleaning is required during production.

[0003] Therefore, when cleaning the edges, the wooden board group at the lower arc cannot be identified and positioning cleaning cannot be performed. The existing processing method is to manually separate the upper and lower separated wooden board groups and simultaneously separate the upper edge skin, which is labor-intensive and has high production costs. Summary of the Invention

[0004] In order to overcome at least one of the defects of the prior art described above, the present invention provides an automatic log production line, which can realize the sawing, upper and lower separation and edge bark removal of logs.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] An automatic log production line, comprising:

[0007] a first conveying assembly mounted on the machine body; the first conveying assembly having a conveying end surface for conveying wood along a conveying direction, the conveying end surface being provided with a plurality of gripping members for gripping the wood;

[0008] a sawing assembly, the sawing assembly being arranged on both sides of the first conveying assembly and being used to saw the wood conveyed by the first conveying assembly;

[0009] a second conveying assembly, the second conveying assembly being connected to a conveying end of the first conveying assembly and being used to receive the sawn wood from the first conveying assembly;

[0010] A separation assembly is provided above the second conveying assembly and includes a separation seat, a separation seat driving member, a first clamping mechanism, and an upper side peel removing mechanism. The first clamping mechanism is installed on the separation seat and is used to clamp the wood on the second conveying assembly. The separation seat can move along the height direction of the machine body and can move along the separation direction. The separation seat driving member is used to drive the separation seat to move. The upper side peel removing mechanism is provided at the bottom end of the separation seat and is used to remove the upper side peel.

[0011] a third conveying assembly, the third conveying assembly being spaced apart from the second conveying assembly in the separation direction and receiving the wood clamped by the first clamping mechanism;

[0012] An edge cleaning component is provided at the conveying ends of the second conveying component and the third conveying component and performs edge cleaning on both sides of the wood.

[0013] In summary, the present invention has the following technical effects:

[0014] The wood can be gripped by the gripping piece on the first conveying component, and the gripping piece on the conveying end surface can be extended into the wood, so that the wood can be kept relatively fixed with the conveying end surface, preventing the conveying component from slipping with the conveying end surface during the process of conveying the wood, and effectively preventing the wood from deflecting, rolling, etc. during the conveying process. Therefore, the wood can maintain a stable state and enter the sawing component for sawing, completing the wood loading, thereby improving the processing accuracy of wood sawing.

[0015] Furthermore, the separation assembly can separate the upper and lower groups of wood planks. The second and third conveyor assemblies can simultaneously transport the upper and lower groups of semi-circular wood planks to the edge cleaning assembly. The edge cleaning assembly can be configured with the same edge cleaning structure for both groups, performing the edge cleaning operation simultaneously to improve edge cleaning efficiency. While the separation operation is in progress, the upper surface can also be removed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the sawing assembly, the first conveying assembly, the material pressing mechanism and the centering alignment mechanism of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the sawing assembly, the edge skin leading-out mechanism and the clamping mechanism of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the material pressing assembly of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the centering alignment mechanism of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the second conveying assembly, the third conveying assembly and the separation assembly of the present invention;

[0023] Figure 8 A structural view of a separation assembly of the present invention;

[0024] Figure 9 Schematic diagram of the structure of the upper edge skin removal mechanism of the present invention;

[0025] Figure 10 It is a structural schematic diagram of the flip assembly of the present invention;

[0026] Figure 11 It is a structural schematic diagram of the lifting and clamping assembly of the present invention;

[0027] Figure 12 It is a structural schematic diagram of the edge cleaning component of the present invention.

[0028] The reference numerals have the following meanings: 10, first conveying assembly; 11, gripping member; 121, positioning wheel; 122, positioning plate; 123, positioning drive member; 131, clamping seat; 132, clamping claw; 133, clamping frame drive member; 141, guide plate; 142, lead-out plate; 20, pressing assembly; 21, swing arm; 22, pressing wheel; 23, third pressing drive member; 30, sawing assembly; 40, third conveying assembly; 50, separation assembly; 51, first clamping member; 52. Second clamping member drive; 531. Needle; 532. Stripper plate; 533. Stripper plate drive; 534. Needle drive; 535. Needle plate; 61. First conveying section; 62. Second conveying section; 63. Turning assembly; 631. Turning frame; 632. Wood trough; 633. Turning frame drive; 70. Waste unloading station; 80. Lifting and clamping mechanism; 81. Lifting frame; 82. Lifting frame drive; 83. Movable frame; 84. Second pressing member; 85. Second clamping member; 86. Second pressing member drive; 90. Edge cleaning assembly; 91. Fourth conveying assembly; 92. Positioning and swinging mechanism; 93. Feeding plate. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See Figures 1-12 The present invention discloses an automatic log production line, including a first conveying component 10, a sawing component 30, a second conveying component, a separation component 50, a third conveying component 40 and an edge cleaning component 90. Specifically, each component on the production line can be assembled based on the machine body.

[0033] The first conveyor assembly 10 has a conveying end surface for conveying wood along a conveying direction. Several gripping members 11 are provided on the conveying end surface to grip the wood and prevent it from shifting after being placed on the conveying end surface. The wood is then conveyed by the first conveyor assembly 10 to the sawing assembly 30, which is located on both sides of the first conveyor assembly 10 and is used to saw the wood conveyed by the first conveyor assembly 10. The sawing assembly 30 can be implemented using a motor-driven multiple saw blades as is conventionally done. These multiple saw blades can cut the log into multiple planks along the height of the machine body.

[0034] The second conveying assembly is connected to the conveying end of the first conveying assembly 10, so that the wood after being sawed by the sawing assembly 30 can be further conveyed by the first conveying assembly 10 to the second conveying assembly, and then conveyed to the separation assembly 50 through the second conveying assembly to separate the upper and lower wooden boards.

[0035] The separation assembly 50 is located above the second conveyor assembly. The separation assembly 50 includes a separation seat, a separation seat drive, a first clamping mechanism, and an upper bark removal mechanism. The first clamping mechanism is mounted on the separation seat and can be used to clamp wood. The separation seat can move along the height direction of the machine body and can move along the separation direction. When the separation seat moves along the height direction of the machine body, it can drive the clamping mechanism on the separation seat to move up and down. When the separation seat moves in the separation direction, it can drive the clamping mechanism on the separation seat to reciprocate between the second conveyor assembly and the third conveyor assembly 40. The first clamping mechanism clamps the upper wooden board group on the second conveyor assembly and then transfers it to the third conveyor assembly 40. The upper bark removal mechanism is located at the bottom end of the separation seat and is used to remove the upper bark.

[0036] After the first clamping mechanism on the separation seat separates the sawn wood board group transported on the second conveying assembly, the second conveying assembly continues to transport the lower wood board group located below, and the third conveying assembly 40 can transport the separated upper wood board group, separate the wood board group and transport it to the edge cleaning assembly 90. After arriving at the edge cleaning assembly 90, the edges of both sides of the wood can be cleaned.

[0037] On the basis of the above structure, when the automatic log production line of the present invention is used, since the logs are mainly cut during wood production, the wood in the log bin can be directly output to the first conveying component 10 of the present application through a robot or a conveyor belt during production, and then received by the conveying end face of the first conveying component 10 for conveying. In this way, since the surface of the wood is an arc, if there is no external force restriction, it is easy for rolling, deviation, etc. to occur during the conveying process.

[0038] In the present application, the wood is transported by the conveying end face of the first conveying component 10. After the wood reaches the conveying end face of the first conveying component 10, it can be gripped by the gripping member 11 on the first conveying component 10. The gripping member 11 on the conveying end face can be extended into the wood, so that the wood can remain relatively fixed with the conveying end face, preventing the conveying component from slipping with the conveying end face during the process of conveying the wood, and effectively preventing the wood from deflecting, rolling, etc. during the conveying process. Therefore, the wood can maintain a stable state and enter the sawing component 30 for sawing, completing the wood loading, thereby improving the processing accuracy of wood sawing.

[0039] After the logs are sawn by the sawing assembly 30, the sawn wood boards are stacked from top to bottom, with side skins at the top, bottom, left and right sides, which need to be removed before being output for later processing and production.

[0040] In this embodiment, the separation direction is the width direction of the body, that is, the second conveying assembly and the third conveying assembly 40 are spaced apart in the width direction of the body, and the separation seat driving member can drive the separation seat to move up and down, as well as left and right along the width direction of the body.

[0041] Specifically, during use, the second conveying assembly can receive the wood conveyed by the sawing assembly 30, and the sawn wood is formed into stacked boards from top to bottom. Since the log is cylindrical, two groups of upper and lower semi-circular arc wood boards are formed after sawing. When the log surface is cleaned later, the upper and lower wood boards are both semi-circular arcs. The cleaning assembly 90 performs positioning cleaning (that is, the side bark of the log is removed), so it is necessary to separate the upper and lower groups of semi-circular arc wood boards and perform cleaning. In this embodiment, after the second conveying assembly receives the sawn wood, the separation seat driving member can drive the separation seat to move above the second conveying assembly. At this time, the first clamping mechanism on the separation seat can be located above the second conveying assembly, and then the separation seat driving member can drive the separation seat to move downward, so that the first clamping mechanism moves to the maximum diameter of the wood. The clamping mechanism can clamp the upper wood board group above the maximum diameter, and the lower wood board group can remain on the second conveying assembly for continued transportation.

[0042] Afterwards, the separation seat driving member can drive the separation seat to move above the third conveying component 40. After that, the first clamping mechanism can place the clamped upper wooden board group on the third conveying component 40, so that the upper template group can be conveyed on the second conveying component, so that the separation of the upper and lower groups of wooden boards can be achieved. The second conveying component and the third conveying component 40 can be separated and the upper and lower groups of semi-arc wooden boards can be conveyed to the edge cleaning component 90 at the same time. The edge cleaning component 90 can be used for edge cleaning. The same edge cleaning structure can be set for the upper and lower groups of semi-arc wooden boards and the edge cleaning action can be performed simultaneously to improve the edge cleaning efficiency.

[0043] While the above-mentioned separation action is being performed, the upper skin removal action can also be performed simultaneously. Specifically, since the log skin (i.e., the upper side skin) will remain on the uppermost wooden board group after sawing, the upper side skin needs to be removed. When the first clamping mechanism clamps the upper wooden board group, the upper side skin removal mechanism is located at the bottom end of the separation seat, and the upper side skin can be removed during the clamping process of the first clamping mechanism.

[0044] Furthermore, the upper skin removal mechanism can be installed at the bottom end of the separation seat, and the upper skin removal mechanism includes a needle 531, a needle driving member 534, a stripping plate 532 and a stripping plate driving member 533. The needle driving member 534 can drive the needle 531 to move along the height direction of the body, and the stripping plate driving member 533 can drive the stripping plate 532 to move along the height direction of the body, that is, the needle 531 and the stripping plate 532 can both move up and down relative to each other on the separation seat, and the needle 531 can penetrate the upper skin when moving downward, and the separation plate separates the upper skin from the needle 531 when moving downward and drops it to the waste material outlet station 70 of the body.

[0045] When the upper side skin is removed, since the upper side skin removal mechanism is arranged on the separation seat, when the separation seat moves downward, when the clamping mechanism clamps the upper wooden board group, the needle 531 located on the separation seat can move under the drive of the needle driving member 534, and the needle 531 can penetrate into the upper side skin located at the top. At the same time, after the separation seat driving member drives the upper wooden board group clamped by the clamping mechanism to move to the third conveying assembly 40, the wooden board group located below the upper side skin can be placed on the third conveying assembly 40 after the clamping mechanism is released, and the upper side skin remains on the separation seat under the action of the needle 531.

[0046] Therefore, the separation seat can be driven by the separation seat driving member to continue to move to the top of the waste discharge station 70. At this time, the stripping plate driving member 533 can drive the stripping plate 532 to move downward. After the stripping plate 532 moves downward, it can push down against the upper side skin fixed by the needle 531. When the stripping plate 532 continues to move downward, the upper side skin can be separated from the needle 531, and the upper side skin can fall to the waste discharge station 70, completing the removal of the upper side skin. There is no need for manual separation at a later time, and the degree of automation is high.

[0047] Furthermore, the upper edge bark removal mechanism includes a needle plate 535 and a plurality of needles 531. The needle plate 535 is mounted on the bottom end of the separation seat, and a plurality of needles 531 are provided at the bottom end of the needle plate 535. The needle drive 534 is used to drive the needle plate 535 to move. In this way, when the upper edge bark is inserted, the needle drive 534 can drive the needle plate 535 downward, thereby simultaneously driving the plurality of needles 531 downward. The plurality of needles 531 can simultaneously penetrate the uppermost portion of the cut wood, forming a relatively large penetration surface. In this way, after penetration, the needles are not easily dropped.

[0048] More specifically, the stripper plate 532 is provided with a plurality of perforations, through which the needles 531 are passed one by one and in coordination with the perforations. Thus, during assembly, the needle plate 535 is positioned above the stripper plate 532, and the needles 531 of the needle plate 535 can extend from the corresponding perforations of the stripper plate 532. When piercing the upper edge of the skin, the stripper plate drive 533 is inactive, and the needle drive 534 drives the needle plate 535 downward. This allows the needles 531 to extend from the perforations of the stripper plate 532 below, guiding them with the perforations and reducing the risk of needle bending during insertion.

[0049] After piercing the upper skin, when removing the upper skin, the stripping plate driving member 533 can drive the stripping plate 532 to move downward, and at the same time the needle driving member 534 drives the needle plate 535 to move upward, so that the stripping plate 532 is in contact with the upper skin of the wood, and the needle 531 moves upward, so that the upper skin and the needle 531 can be quickly separated.

[0050] Of course, the upper side skin removal mechanism can also use a vacuum suction cup structure, so that when the first clamping mechanism clamps the upper wooden board group, the vacuum suction cup can suck the uppermost upper side skin. After the first clamping mechanism places the upper wooden board group on the third conveying assembly 40, the vacuum suction cup sucks the upper side skin. As the separation seat is transferred to the waste material discharge station 70 of the machine body, the vacuum suction cup puts down the upper side skin, and the upper side skin falls off, which can also achieve the removal of the upper side skin.

[0051] Furthermore, the first clamping mechanism in this embodiment includes a first clamping member 51 driving member and two first clamping members 51. The first clamping member 51 driving member and the two first clamping members 51 are all installed on the separation seat, and the two first clamping members 51 are spaced apart on the separation seat. Specifically, the two first clamping members 51 can be spaced apart in the width direction of the body, and the above-mentioned first clamping member 51 driving member is used to drive the two first clamping members 51 to approach or move away from each other.

[0052] On the basis of this structure, when performing the clamping action, the separation seat located above the second conveying assembly can move downward under the drive of the separation seat driving member. At this time, the two first clamping members 51 can move away from each other under the action of the first clamping member 51 driving member. In this way, a clamping gap can be formed between the two first clamping members 51. When the separation seat moves downward, the cut wood can be extended into the clamping gap formed by the two first clamping members 51, and then the first clamping member 51 driving member can drive the two first clamping members 51 to approach each other at the same time, so that the wood can be clamped.

[0053] After the clamping is completed, the separation seat is driven by the separation seat driving member to move above the third conveying assembly 40, and then the separation seat driving member drives the separation seat to move downward, so that the wood between the two first clamping members 51 is placed on the third conveying assembly 40, and the first clamping member 51 driving member drives the two first clamping members 51 away from each other, thereby releasing the wood.

[0054] Furthermore, since the outer diameter of the lower wooden board group of the semicircular arc that continues to be transported on the second conveying component decreases from top to bottom, it is inconvenient to position it when it is directly transported to the edge cleaning structure for edge cleaning, so the clamping action is completed below the separation component 50. Therefore, a flipping component 63 can be set in the conveying direction of the two conveying components. The flipping component 63 receives the lower wooden board group of the semicircular arc that can continue to be transported by the second conveying component for flipping. The flipped wooden board group can be turned to a maximum outer diameter located at the conveying end face of the second conveying component. The outer diameter of the flipped wood group gradually increases from top to bottom, that is, it remains consistent with the upper wooden board group on the third conveying component 40.

[0055] Specifically, the second conveying assembly includes a first conveying section 61 and a second conveying section 62. A flipping assembly 63 is provided between the conveying end of the first conveying section 61 and the starting end of the second conveying section 62. The flipping assembly 63 is used to receive the wood conveyed by the first conveying section 61 and flip the wood to the second conveying section 62.

[0056] During wood conveying, the sawn wood can be received by the first conveying section 61. After the separation operation is completed, the first conveying section 61 can continue to separate the lower wood board group to the conveying end of the first conveying section 61, where it is received by the flipping assembly 63. After receiving the lower wood board group, the flipping assembly 63 flips the flipped wood board group and flips it to the second conveying section 62, which can then continue conveying. In this embodiment, the first conveying section 61 and the second conveying section 62 are separated into two sections and conveyed separately, without stopping the machine for flipping, so that the conveying operation is continuous and the efficiency is improved.

[0057] Furthermore, the turning assembly 63 in this embodiment includes a turning frame 631 and a turning frame driver 633. The turning frame 631 is provided with a wood trough 632, specifically, the wood trough 632 has an entrance and exit. The turning frame driver 633 can drive the turning frame 631 to rotate between the first conveying section 61 and the second conveying section 62. Specifically, after the turning frame 631 turns over to the first conveying section 61, the entrance and exit of the turning frame 631 can be connected to the conveying end of the first conveying section 61. Conversely, after the turning frame 631 turns over to the second conveying section 62, the entrance and exit can be connected to the conveying starting point of the second conveying section 62.

[0058] In this way, when performing the flipping operation, the flip frame driver 633 can drive the flip frame 631 to flip to the conveying end of the first conveying section 61, so that the entrance and exit of the wood trough 632 of the flip frame 631 correspond to the conveying end of the first conveying section 61. The wood is conveyed by the first conveying section 61 through the entrance and exit and enters the wood trough 632, that is, the wood can be received by the wood trough 632. Thereafter, the flip frame driver 633 drives the flip frame 631 to flip, and the wood in the wood trough 632 can be flipped to the second conveying section 62. At this time, the entrance and exit of the wood trough 632 correspond to the starting end of the second conveying section 62, and the wood extending from the entrance and exit can be located on the second conveying section 62. Under the conveyance of the second conveying section 62, the wood can be discharged from the wood trough 632 through the entrance and exit and transported by the second conveying section 62 to the next workstation. Thereafter, the flip frame 631 flips back to the first conveying section 61 to perform the flipping operation for the next group of wood.

[0059] Furthermore, the automatic log production line also includes a lifting and clamping assembly, including a lifting mechanism and a second clamping mechanism. The lifting mechanism includes a lifting frame 81 and a lifting frame driving member 82. The lifting frame driving member 82 is used to drive the lifting frame 81 to move along its own height direction; the second clamping mechanism includes a movable frame 83, a second clamping member 85, a second pressing member 84 and a second pressing member driving member 86. The movable frame 83 is installed on the lifting frame 81 and can move along the height direction of the lifting frame 81; the second clamping member 85 is installed at the bottom end of the movable frame 83 and is used to clamp the wood on the second conveying assembly and the third conveying assembly 40; the second pressing member 84 is installed at the bottom end of the movable frame 83, and the second pressing member driving member 86 is used to drive the second pressing member 84 to move along the height direction of the movable frame 83; the second pressing member 84 is used to press the wood.

[0060] During the clamping operation, the lifting frame 81 can be driven downward by the lifting frame driving member 82, and the movable frame 83 on the lifting frame 81 and the second clamping mechanism connected to the movable frame 83 can move downward synchronously, corresponding to the wood boards on the second conveyor assembly and the third conveyor assembly 40. The second clamping mechanism then operates to clamp the wood. During the clamping operation, the second pressing member 84 can be driven downward by the second pressing member driving member 86 to press the wood, and then the second clamping mechanism performs the clamping operation, which can prevent the wood from becoming unstable during the clamping process.

[0061] Then the second clamping mechanism can place the wood on the conveyor line of the edge cleaning component 90 for stacking. During this process, the lifting frame 81 can move downward under the action of the lifting frame driving member 82 to stack the wood on the wood. Since there is a height difference between the wood height of the clamping station and the wood height of the stacking station on the conveyor line, when the second clamping mechanism of the lifting frame 81 performs the clamping action, the second pressing piece 84 is on the top of the wood. Therefore, after the second clamping mechanism stacks the wood on the wood, the overall stacking station of the wood will be raised, so the second pressing piece 84 needs to move upward. At this time, since the second pressing piece 84 slides relative to the lifting frame 81 through the movable frame 83, the movable frame 83 will move on itself. Gravity maintains a downward sliding tendency, so after the wood is stacked, since the second pressing piece driving piece 86 does not move, the second pressing piece 84 can be pushed up by the top wood and move up a distance, and the upward position is the height difference generated by the stacked wood, and the second pressing piece driving piece 86 does not move, and the second pressing piece 84 always keeps moving down under the action of the dead weight of the movable frame 83, that is, the second pressing piece 84 can adaptively adjust its position according to the height of the wood, and press wooden boards of different heights with the same pressure, that is, after the second clamping mechanism releases the wood, the second pressing piece 84 applies the same pressure to the wood, and the wood will not fall off or swing due to changes in pressure, and the clamping and transfer process is stable.

[0062] Furthermore, the movable frame 83 can be slidably connected to the lifting frame 81 via a sliding mechanism, and the movable frame 83 is configured to slide downward under its own weight. Specifically, the sliding mechanism in this embodiment includes a slider and a slide rail. The slide rail is connected to the lifting frame 81 and extends along the height direction of the lifting frame 81. The slider is connected to the movable frame 83, and the slider and the slide rail are slidably engaged. In this way, the movable frame 83 can slide up and down relative to the slide rail on the lifting frame 81 via the slider. Under the action of the weight of the movable frame 83, the slider can maintain the downward sliding trend with the slide rail. After stacking the wood, the movable frame 83 can also slide upward relative to the slide rail due to the upward force of the top wood, thereby completing adaptive position adjustment.

[0063] Of course, the above-mentioned sliding mechanism can also be implemented in the form of a guide sleeve and a guide rod, that is, a guide sleeve is set on the movable frame 83, and a guide rod is correspondingly set on the lifting frame 81, and then the guide sleeve is slidably sleeved on the outside of the guide rod, so that the relative sliding of the movable frame 83 and the lifting frame 81 can be achieved.

[0064] More specifically, the edge cleaning component 90 includes a fourth conveying component 91 and an edge cleaning saw blade mechanism. Since the wooden boards are stacked to a certain height and then the edge cleaning saw blade mechanism is used for edge cleaning, the edge cleaning efficiency can be improved.

[0065] Therefore, the second clamping member 85 of the above-mentioned lifting and clamping assembly can be used to transfer the wooden board group on the second conveying assembly and the third conveying assembly 40 to the fourth conveying assembly 91 of the edge cleaning assembly 90, and then press it through the second pressing member, so that the stacking height of the wooden board group can be adaptively adjusted, and enter the edge cleaning saw blade mechanism in a stable state to perform edge cleaning action.

[0066] Furthermore, a centering component is provided at the starting end of the fourth conveying component 91, and the centering component includes a feed plate 93, a positioning swing mechanism 92 and two limit plates, and the two limit plates are respectively arranged on both sides of the second conveying component and form a positioning gap; the feed plate 93 is connected between the two limit plates, and the bottom end of the feed plate 93 and the conveying end face of the second conveying component are spaced to form a pushing gap; the positioning swing mechanism 92 is connected to the ends of the two limit plates away from the feed plate 93, and is used to center the wood in the positioning gap.

[0067] After the clamping mechanism of the lifting clamping assembly transfers the wood to the fourth conveying assembly 91, since the wood conveyed by the first conveying assembly 10 is formed by cutting logs, a wooden board with a wide top and a narrow bottom is formed after cutting. Therefore, when the wooden board is transported to the edge cleaning saw blade mechanism, the wooden boards with a wide top and a narrow bottom are easily caused to overturn and get stuck when stacked. Therefore, the wood can be placed in the positioning interval formed by the two limit plates, and the feeding plate 93 is used to abut against it, which can effectively prevent the wood from tipping over after stacking.

[0068] In addition, a wood centering positioning mechanism is provided at the ends of the two limit plates away from the feed plate 93, which can position and center the wood in the positioning interval, so that the wooden board with a wide top and a narrow bottom can maintain a stable centered state in the positioning interval. In this way, when the wood is transported by the fourth conveying component 91, each wooden board enters the edge cleaning component 90 in a centered position, thereby reducing the chance of material jamming in the edge cleaning machine.

[0069] It should be noted that a push plate can be provided on the fourth conveying assembly 91, so that when the fourth conveying assembly 91 is in motion, the push plate can push the lowest wooden board along the fourth conveying assembly 91, so that the lowest wooden board can enter the edge cleaning assembly 90 through the pushing gap formed by the conveying end face between the feed plate 93 and the fourth conveying assembly 91 for edge cleaning. Of course, the height of the pushing gap formed by the above-mentioned feed plate 93 and the conveying end face of the fourth conveying assembly 91 is set to a height that allows one board to enter, so that each time the push plate of the second conveying assembly pushes, it pushes one board into the edge cleaning assembly 90.

[0070] Furthermore, a pressing assembly 20 is provided at the starting end of the first conveying assembly 10. The pressing assembly 20 includes a third pressing member and a third pressing member driving member. The third pressing member is provided above the conveying end surface. The third pressing member can move close to or away from the conveying end surface. The third pressing member is used to apply pressure to the wood after approaching the conveying end surface so that the gripping member 11 extends into the wood; the third pressing member driving member is used to drive the third pressing member to move;

[0071] The third pressing member includes a swing arm 21 and a pressing wheel 22. One end of the swing arm 21 is rotatably mounted on the machine body, and the other end of the swing arm 21 is provided with a pressing wheel 22. The third pressing member driving member is used to drive the swing arm 21 to rotate so that the pressing wheel 22 approaches or moves away from the conveying end surface. The pressing wheel 22 is used to apply pressure to the wood after approaching the conveying end surface.

[0072] After the wood is received by the conveying end face of the first conveying assembly 10, it can be conveyed to the bottom of the third pressing piece along the conveying direction. After the wood is conveyed to the bottom of the third pressing piece, the third pressing piece can be driven by the third pressing piece driving piece to move downward close to the conveying end face. The third pressing piece can exert pressure on the wood during the downward movement. Since a number of gripping members 11 are arranged on the conveying end face, after the wood on the conveying end face is subjected to force, the gripping members 11 on the conveying end face can be extended into the wood, so that the wood can remain relatively fixed with the conveying end face, preventing the first conveying assembly 10 from slipping with the conveying end face during the process of conveying the wood, and can effectively prevent the wood from deflecting, rolling, etc. during the conveying process. Therefore, the wood can maintain a stable state and enter the sawing assembly 30 for sawing, completing the wood loading, so that the later processing process is stable, thereby improving the processing accuracy.

[0073] Of course, after the previous wood is pressed by the third pressing piece and fixed relatively with the gripping piece 11, the first conveying assembly 10 can continue to convey the wood to the next workstation. At this time, the third pressing piece driving piece can drive the third pressing piece to move upward, away from the conveying end surface, and the following wood can continue to be conveyed to the bottom of the third pressing piece. The above-mentioned third pressing piece driving piece can drive the third pressing piece to move downward again, and repeat the above-mentioned pressing action. In this way, each wood conveyed by the first conveying assembly 10 can be interlocked with the gripping piece 11 on the conveying end surface, maintaining a stable conveying state for conveying and processing of wood.

[0074] Furthermore, in this embodiment, the above-mentioned third pressing member includes a swing arm 21 and a pressing wheel 22. One end of the swing arm 21 is rotatably installed on the machine body, and the other end of the above-mentioned swing arm 21 is provided with a pressing wheel 22. In this way, the swing arm 21 can be driven to rotate by the third pressing member driving member. During the swinging process of the swing arm 21, the pressing wheel 22 connected to the swing arm 21 can approach or move away from the conveying end face of the first conveying assembly 10. After the pressing wheel 22 approaches the conveying end face, it can apply pressure to the wood.

[0075] In this way, when the material pressing action is performed, the swing arm 21 can be driven to rotate downward by the third material pressing member driving member. When the swing arm 21 rotates downward, the pressing wheel 22 on the swing arm 21 can approach the conveying end face of the first conveying assembly 10. In the process of the pressing wheel 22 approaching the conveying end face, the pressing wheel 22 can press the wood on the conveying end face, and the pressing wheel 22 contacts the end face of the wood with an arc surface rather than a straight surface. In this way, during the pressing process, the wood is subjected to greater force, and it is easier to press the wood onto the gripping member 11 of the conveying end face.

[0076] At the same time, the swing direction of the swing arm 21 can be consistent with the conveying direction, or it can swing forward from the rear of the conveying direction, opposite to the direction of travel of the wood, that is, when the pressure wheel swings from top to bottom, it can provide a resistance in the direction of travel of the wood, and at the same time exert downward pressure from above, so that the wood and the gripping member 11 are easier to fit together and the fitting force is greater.

[0077] Furthermore, a centering positioning component can be provided on the machine body. Specifically, the centering positioning component is provided at the starting end of the conveying end surface, and the centering positioning component and the pressing component 20 are distributed in sequence in the conveying direction.

[0078] After the wood is output from the log bin, it is received and transported by the first conveying component 10. After entering the conveying end surface of the first conveying component 10, it may be transported directly at the edge of the conveying end surface of the first conveying component 10 or in a skewed state. If it is transported at the edge of the conveying end surface or in a skewed state, then after reaching the pressing piece, the pressing piece also presses the wood and the gripping piece 11 at the edge position.

[0079] Therefore, before reaching the pressing assembly 20, the wood needs to be centered first. The centering positioning mechanism can guide the edge of the conveying end surface to the middle of the conveying end surface. When the wood is at the starting end of the conveying end surface, the centering positioning mechanism can be used to center the wood and guide the deflected wood to be straightened. The centered and straightened wood can then be transported from the conveying end surface to the bottom of the pressing piece of the pressing assembly 20 for compaction.

[0080] In this way, after the pressing piece is pressed, the wood can be located in the middle of the conveying end surface in a straightened state, and then the pressing piece is pressed downward and engaged with the gripping piece 11 on the conveying end surface. In this way, the wood conveyed by the first conveying component 10 can arrive at the subsequent workstation for processing in a centered and straightened state, thereby improving the processing accuracy of each subsequent process.

[0081] Furthermore, in this embodiment, the centering assembly includes two positioning wheel mechanisms 121, which are respectively disposed on either side of the starting end of the conveying end surface. Specifically, the positioning wheel mechanisms 121 include a positioning plate 122 and positioning wheels 121, which are mounted on the machine body and rotatably mounted on the positioning plate 122.

[0082] Based on this structure, when centering the wood, the wood received by the first conveying component 10 can reach between the two positioning plates 122, and the wood can be guided in by the positioning wheels 121 on both sides, and centered under the action of the positioning wheels 121 on both sides, thereby achieving centering.

[0083] In addition, the positioning wheel 121 is positioned in the center, and the positioning wheel 121 can cooperate with the surface of the wood in rolling, and can also guide the smooth transportation of the wood. It can also be transported during the positioning process to reduce the possibility of jamming.

[0084] Furthermore, the centering alignment mechanism further includes a positioning drive 123, which can drive the two positioning plates 122 to move closer to or away from each other. In this way, the interval between the two positioning plates 122 can be adjusted by the positioning drive 123, and the wood is transported and positioned at the positioning interval formed by the positioning wheels 121 on the two positioning plates 122. The outer diameter of the transported wood varies. Therefore, by providing the positioning drive 123, when the outer diameter of the wood is large, the positioning drive 123 can be used to drive the two positioning plates 122 to move away from each other, so that the positioning interval formed by the positioning wheels 121 of the two positioning plates 122 is relatively large, which is suitable for centering wood with a larger outer diameter. When the outer diameter of the wood is small, the positioning drive 123 can be used to drive the two positioning plates 122 to move closer to each other, so that the positioning interval formed by the positioning wheels 121 of the two positioning plates 122 is relatively small, which is suitable for centering wood with a smaller outer diameter.

[0085] That is, in the present application, a positioning drive 123 is provided to drive the two positioning plates 122 to move closer to or away from each other, so as to adjust the positioning interval between the positioning wheels 121 on both sides, which is suitable for centering and transporting wood with different outer diameters.

[0086] Furthermore, the first conveying assembly 10 in this embodiment includes a conveying chain, a sprocket and a sprocket driving component, and the conveying chain is wound around the sprocket. Specifically, sprockets are arranged on both sides of the machine body, and the two ends of the conveying chain can be wound around the sprockets at both ends. In this way, the horizontal transmission section of the conveying chain between the two sprockets can be formed into a conveying end face. During transportation, the sprocket can be driven to rotate by a motor, and the rotation of the sprocket can drive the conveying chain for transmission, and the wood can be conveyed on the conveying end face formed by the conveying chain.

[0087] It should be noted that a plurality of sharp teeth may be provided on the conveyor chain, and the plurality of sharp teeth may be spaced apart in the length direction of the conveyor chain, so that after the wood is placed on the conveyor chain, the sharp teeth may be located below the wood, and when the wood is conveyed to the bottom of the pressing piece, the pressing piece moves downward to apply pressure on the wood, so that the wood can press the sharp teeth, and the sharp teeth can be embedded in the inside of the wood, so that the wood can be fixed relative to the conveyor chain. Based on this structure, the sharp teeth are formed into the above-mentioned gripping member 11.

[0088] Of course, the above-mentioned conveying component can be selected as a conveying belt, and a blade structure can be set on the conveying belt. The blade can also be inserted into the wood under the action of the pressing piece, or a pin structure can be set at the same time to penetrate into the wood, both of which can form the above-mentioned gripping member 11 structure.

[0089] Of course, the second conveying assembly, the third conveying assembly 40 and the fourth conveying assembly 91 can all be implemented as conveying structures such as conveying belts or conveying chains.

[0090] Furthermore, a clamping mechanism is provided at the conveying end of the first conveying assembly 10, and the specific clamping mechanism includes a clamping frame, a clamping member and a clamping frame driving member 133. The clamping frame is installed on the machine body, and the clamping frame can slide relative to the machine body along the conveying direction; the clamping frame driving member 133 is used to drive the clamping frame to move along the conveying direction; clamping members are provided on both sides of the clamping frame, and the two clamping members are spaced to form a clamping gap; the clamping gap is used to receive the wood output by the sawing assembly 30, and the clamping gap is used to receive the wood output by the sawing assembly 30.

[0091] The clamping frame can be moved to the discharge position of the sawing assembly 30 under the action of the clamping frame driving member 133, and the wood can be transported to the sawing assembly 30 through the conveying mechanism. After the sawing assembly 30 performs a saw blade action on the wood, the conveying mechanism outputs the wood behind the saw blade. At this time, the clamping frame is located at the discharge position of the sawing assembly 30, so that the wood can directly enter the clamping gap formed by the two clamping members after sawing, and the clamping members on both sides can clamp on both sides of the sawed wood. At the same time, since the clamping frame can slide relative to the machine body along the conveying direction after clamping the sawed wood, the sawed wood can be output in a clamped state by the clamping members on both sides.

[0092] Since the wood forms a wood chip structure after the saw blade, if only relying on the conveying force of the conveying mechanism, there will be friction with the saw blade during the conveying process of the wood chips. Due to the small conveying contact area and insufficient friction, the wood chips are prone to flying or retreating. Therefore, in this application, the wood directly enters the clamping gap formed by the two clamping parts after the saw blade is completed, and is output in a clamped state in conjunction with the conveying force of the conveying mechanism to prevent the wood from retreating, flying, etc. caused by the output after the saw blade action is completed.

[0093] More specifically, the clamping member includes a clamping seat 131 and a plurality of clamping claws 132. The clamping seat 131 is mounted on a clamping frame, and the plurality of clamping claws 132 are spaced apart in the height direction of the clamping seat 131. Since wood is sawed from top to bottom to form a plurality of stacked wood chips, if a single clamping seat 131 structure were used for clamping, the wood chips, which are connected from top to bottom, would be easily displaced because the clamping force of the clamping seat 131 is not applied to each wood chip. Therefore, a plurality of clamping claws 132 can be provided on the same clamping seat 131 from top to bottom, with each clamping claw 132 corresponding to each wood chip from top to bottom. The number of clamping claws 132 can be set according to the thickness, with just one layer of clamping claws 132 sandwiching a layer of wood. This adapts to wood of different diameters and shapes, and can firmly hold each layer. This effectively prevents flying wood from being discharged after sawing.

[0094] More specifically, the two adjacent clamping claws 132 in the height direction of the clamping seat 131 are staggered, that is, the two adjacent clamping claws 132 in the height direction can be staggered in the conveying direction. In this way, the same clamping piece has staggered clamping claws 132 from top to bottom in the conveying direction, which can clamp the wood chips at different positions, so that the clamping surface is larger and the clamping effect is better.

[0095] Furthermore, the conveying end of the first conveying component 10 is also provided with a side skin export component, which includes a guide plate 141 and an export plate 142. The guide plate 141 is installed on the machine body and extends along the conveying direction; the guide plate 141 is arranged above the conveying end surface and is spaced apart from the conveying end surface to form an export gap; the export plate 142 is arranged at the end of the conveying component and is located below the guide plate 141. The export plate 142 is used to receive the wood side skin exported from the export gap and export it downward.

[0096] After the log is transported by the first conveying assembly 10 to the sawing assembly 30 for sawing, the multiple saw blades of the sawing assembly 30 cut the log from top to bottom to form multiple wood chips. The wood chip at the bottom has the log edge bark. In this way, after sawing, the edge bark at the bottom of the wood can continue to move along the conveying end surface. When it is transported to the position of the guide plate 141, the edge bark at the bottom of the wood can enter the lead-out gap formed between the guide plate 141 and the conveying end surface.

[0097] It should be noted that the thickness of the lead-out gap formed between the guide plate 141 and the conveying end surface can be set to a thickness that allows the lower side skin to pass through, that is, the guide plate 141 will guide the wood chip at the bottom to be conveyed to the next station, and the lower side skin is conveyed to the lead-out plate 142 through the lead-out gap between the bottom of the guide plate 141 and the conveying end surface, and is guided downward through the lead-out plate 142. In this way, separation can be achieved at the guide plate 141 of the side skin lead-out assembly, and the lead-out plate 142 guides the side skin to achieve waste extraction, without the need for manual separation of side skin waste later. At the same time, the conveying end surface continues to convey, and the wood in the front of the conveying direction can push the wood in the rear of the conveying direction, or the wood can be pushed to the position of the guide plate 141 to extract and output the side skin waste and wood chips.

[0098] Specifically, the above-mentioned export plate 142 can be gradually tilted from top to bottom in the conveying direction. Since the export plate 142 is connected to the export gap, the edge waste exported from the export gap can be exported downward in the tilted direction of the export plate 142 after reaching the export plate 142.

[0099] In other cases, the guide plate 142 may also be a curved arc plate. The arc surface formed by the arc plate can also provide a downward guiding force after receiving the edge skin, guiding the edge skin downward. In addition, the guide plate 142 can be inclined from top to bottom and gradually tilted backward in the conveying direction, that is, gradually guiding the edge skin as the wood is conveyed from front to back.

[0100] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A log automatic production line, characterized in that: Including the body; a first conveying assembly, the first conveying assembly having a conveying end surface for conveying wood along a conveying direction, the conveying end surface being provided with a plurality of gripping members for gripping the wood; a sawing assembly, the sawing assembly being arranged on both sides of the first conveying assembly and being used to saw the wood conveyed by the first conveying assembly; a second conveying assembly, the second conveying assembly being connected to a conveying end of the first conveying assembly and being used to receive the sawn wood from the first conveying assembly; A separation assembly is provided above the second conveying assembly and includes a separation seat, a separation seat driving member, a first clamping mechanism, and an upper side skin removal mechanism. The first clamping mechanism is installed on the separation seat and is used to clamp the wood on the second conveying assembly. The separation seat can move along the height direction of the machine body and can move along the separation direction. The separation seat driving member is used to drive the separation seat to move. The upper side skin removal mechanism is provided at the bottom end of the separation seat and is used to remove the upper side skin. a third conveying assembly, the third conveying assembly being spaced apart from the second conveying assembly in the separation direction and receiving the wood clamped by the first clamping mechanism; An edge cleaning component is provided at the conveying ends of the second conveying component and the third conveying component and performs edge cleaning on both sides of the wood.

2. The automatic log production line according to claim 1, characterized in that: The upper edge skin removal mechanism includes a needle, a needle driving member, a stripping plate and a stripping plate driving member; the needle driving member is used to drive the needle to move along the height direction of the machine body; the needle is used to pierce the upper edge skin; the stripping plate driving member is used to drive the stripping plate to move along the height direction of the machine body, and the stripping plate is used to separate the upper edge skin from the needle and drop it to the waste material outlet station.

3. The automatic log production line according to claim 2, characterized in that: The upper edge skin removal mechanism includes a needle plate and multiple needles. The needle plate is installed at the bottom end of the separation seat, and multiple needles are provided at the bottom end of the needle plate; the needle driving member is used to drive the needle plate to move; the stripping plate is provided with multiple perforations, and each of the needles passes through each of the perforations one by one and cooperates with each of the perforations.

4. The automatic log production line according to claim 1, characterized in that: The second conveying assembly includes a first conveying section and a second conveying section. A flipping assembly is provided between the conveying end of the first conveying section and the starting end of the second conveying section. The flipping assembly is used to receive the wood conveyed by the first conveying section and flip the wood to the second conveying section.

5. The automatic log production line according to claim 4, characterized in that: The turning assembly includes a turning frame and a turning frame driving component. The turning frame is provided with a wood groove, and the wood groove has an entrance and exit. The turning frame driving component is used to drive the turning frame to rotate between the first conveying section and the second conveying section. The entrance and exit is used to connect with the conveying end of the first conveying section after the turning frame is turned over to the first conveying section; the entrance and exit is used to connect with the conveying starting end of the second conveying section after the turning frame is turned over to the second conveying section.

6. The automatic log production line according to any one of claims 1 to 5, characterized in that: The automatic log production line also includes a lifting and clamping assembly, including a lifting mechanism and a second clamping mechanism, the lifting mechanism includes a lifting frame and a lifting frame driving member, the lifting frame driving member is used to drive the lifting frame to move along its own height direction; the second clamping mechanism includes a movable frame, a second clamping member, a second pressing member and a second pressing member driving member, the movable frame is installed on the lifting frame and can move along the height direction of the lifting frame; the second clamping member is installed at the bottom end of the movable frame and is used to clamp the wood on the second conveying assembly and the third conveying assembly; the second pressing member is installed at the bottom end of the movable frame, and the second pressing member driving member is used to drive the second pressing member to move along the height direction of the movable frame; the second pressing member is used to press the wood.

7. The automatic log production line according to claim 6, characterized in that: The movable frame is slidably connected to the lifting frame through a sliding mechanism, and the movable frame is used to slide downward under its own gravity; the sliding mechanism includes a slider and a slide rail, the slide rail is connected to the lifting frame, and the slide rail extends along the height direction of the lifting frame; the slider is connected to the movable frame, and the slider and the slide rail are slidably matched.

8. The automatic log production line according to claim 6, characterized in that: The edge cleaning component includes a fourth conveying component and an edge cleaning saw blade mechanism, the fourth conveying component is used to receive the wood clamped and transferred by the second clamping member, and the second pressing member is used to press the wood on the fourth conveying component; the starting end of the fourth conveying component is provided with a centering component, the centering component includes a feeding plate, a positioning swing mechanism and two limit plates, the two positioning plates are respectively arranged on both sides of the second conveying component and form a positioning interval; the feeding plate is connected between the two limit plates, and the bottom end of the feeding plate and the conveying end face of the second conveying component are spaced to form a pushing interval; the positioning swing mechanism is connected to the ends of the two limit plates away from the feeding plate, and is used to center the wood in the positioning interval.

9. The automatic log production line according to any one of claims 1 to 5, characterized in that: A material pressing assembly is provided at the starting end of the first conveying assembly, and the material pressing assembly includes a third material pressing member and a third material pressing member driving member. The third material pressing member is provided above the conveying end surface and can move toward or away from the conveying end surface. The third material pressing member is used to apply pressure to the wood after approaching the conveying end surface, so that the gripping member extends into the wood; the third material pressing member driving member is used to drive the third material pressing member to move; The third pressing member includes a swing arm and a pressing wheel, one end of the swing arm is rotatably mounted on the machine body, and the other end of the swing arm is provided with the pressing wheel; the third pressing member driving member is used to drive the swing arm to rotate so that the pressing wheel approaches or moves away from the conveying end surface; the pressing wheel is used to apply pressure to the wood after approaching the conveying end surface.

10. The automatic log production line according to claim 9, characterized in that: A centering positioning assembly is also provided on the starting end of the first conveying assembly, and the centering positioning assembly and the pressing assembly are distributed in sequence in the conveying direction of the first conveying assembly; the centering positioning assembly includes two positioning wheel mechanisms, and the two positioning wheel mechanisms are respectively provided on both sides of the starting end of the conveying end face; the positioning wheel mechanism includes a positioning plate and a positioning wheel, the positioning plate is installed on the machine body, and the positioning wheel is rotatably installed on the positioning plate.

11. The automatic log production line according to any one of claims 1 to 5, characterized in that: The conveying end of the first conveying assembly is further provided with a clamping mechanism, the clamping mechanism comprising a clamping frame, a clamping member, and a clamping frame driving member. The clamping frame is mounted on the machine body and can slide relative to the machine body along the conveying direction; the clamping frame driving member is used to drive the clamping frame to move along the conveying direction; the clamping members are provided on both sides of the clamping frame, and the two clamping members are spaced apart to form a clamping gap; the clamping gap is used to receive the wood output by the sawing assembly; The clamping member includes a clamping seat and a plurality of clamping claws, wherein the clamping seat is mounted on the clamping frame; the plurality of clamping claws are distributed at intervals in the height direction of the clamping seat; and two adjacent clamping claws in the height direction of the clamping seat are distributed in a staggered manner.

12. The automatic log production line according to claim 11, characterized in that: The conveying end of the first conveying component is also provided with a wood edge exporting component, and the wood edge exporting component includes a guide plate and an exporting plate, the guide plate is installed on the machine body and extends along the conveying direction; the guide plate is arranged above the conveying end surface and is spaced apart from the conveying end surface to form an exporting gap; the exporting plate is arranged at the end of the conveying component and is located below the guide plate, and the exporting plate is used to receive the wood edge exported from the exporting gap and export it downward.

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