Positioning device for adhesion of three layers of wood boards

Abstract

The utility model discloses a positioning device for adhesion of three layers of wood boards, and relates to the technical field of adhesion and press fit of wood boards, the positioning device comprises an anti-skid rubber mat and an L-shaped sleeve block, the anti-skid rubber mat is installed and connected on the inner side of the lower end of the L-shaped sleeve block, an L-shaped adjusting plate is arranged at the upper end of the L-shaped sleeve block, a locking bolt is arranged at the joint of the L-shaped adjusting plate and the L-shaped sleeve block, and the L-shaped adjusting plate is connected with the L-shaped sleeve block through the locking bolt. A carrying handle rod is arranged at the rear end of the L-shaped adjusting plate, a sawtooth lifting plate is arranged on the inner side of the L-shaped adjusting plate, a lifting adjusting mechanism is arranged on the portion, located on the L-shaped adjusting plate, of the outer side of the sawtooth lifting plate, and an elastic abutting column head is arranged at the lower end of the sawtooth lifting plate. The lifting adjusting mechanism rotates in the forward direction, the lifting adjusting mechanism drives the sawtooth lifting plate to descend from the L-shaped adjusting plate, the sawtooth lifting plate can drive the elastic abutting column head at the lower end to abut against a three-layer wood board workpiece, and therefore effective and automatic clamping and positioning can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wooden board adhesion and pressing, in particular to a positioning device for adhesion of three-layer wooden boards. Background Art

[0002] When the wooden boards are stacked and connected, it is necessary to apply adhesive glue between the wooden boards. Each time they are stacked, glue needs to be applied between the wooden boards to facilitate the adhesion of the wooden boards. After the three layers of wooden boards are stacked and glued together with glue, in order to avoid the separation of the three layers of wooden boards, clamping and positioning are required.

[0003] The existing Chinese patent CN211137472U disclosed a woodworking clamp for wood board processing on July 31, 2020, including a movable plate, a plurality of through holes are opened on the upper surface of the movable plate, and two of the through holes are provided with sliding rods, and the two sliding rods are fixedly connected to the lower surface of the pull plate, and the lower surface of the pull plate is fixedly connected to the upper surfaces of the two sliding sleeves through two springs, and the two springs are respectively sleeved on the outside of the two sliding rods, the sliding rod is sleeved in the sliding sleeve, and the two sliding sleeves are clamped on the upper surface of the movable sleeve, the movable plate is sleeved in the movable sleeve, and the lower surface of the movable sleeve is fixedly connected to the connecting plate.

[0004] However, the above device needs to be manually operated by personnel when performing positioning and clamping, and cannot effectively and automatically adjust the clamping, which is not very convenient when clamping and positioning. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, and a positioning device for the adhesion of three-layer wooden boards is proposed. The lifting and adjusting mechanism rotates forward, and the lifting and adjusting mechanism drives the serrated lifting plate to descend from the L-shaped adjusting plate, so that the serrated lifting plate can drive the lower end to elastically resist the column head to resist on the three-layer wooden board workpiece, so that it can effectively clamp and position automatically.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A positioning device for bonding three layers of wooden boards, comprising an anti-skid rubber pad and an L-shaped sleeve block, the anti-skid rubber pad being installed and connected to the inner side of the lower end of the L-shaped sleeve block, an L-shaped adjustment plate being arranged at the upper end of the L-shaped sleeve block, a locking bolt being arranged at the connection between the L-shaped adjustment plate and the L-shaped sleeve block, a carrying handle rod being arranged at the rear end of the L-shaped adjustment plate, a serrated lifting plate being arranged at the inner side of the L-shaped adjustment plate, a lifting and adjusting mechanism being arranged on the outer side of the serrated lifting plate, an elastic resistance column head being arranged at the lower end of the serrated lifting plate, a three-layer wooden board workpiece being arranged between the elastic resistance column head and the L-shaped sleeve block, and the lifting and adjusting mechanism being electrically connected to an external controller.

[0008] Through the above technical scheme: the three-layer wooden workpiece is placed on the edge of the external table board, and the personnel holds the carrying handle rod at the rear end of the L-shaped adjustment plate so that it can be held and carried, and the L-shaped sleeve drives the anti-slip rubber pad to fit under the table board, and then turns on the external controller to make the lifting and lowering adjustment mechanism rotate forward, and the lifting and lowering adjustment mechanism drives the serrated lifting plate to descend from the L-shaped adjustment plate, so that the serrated lifting plate can drive the lower end elastic resistance column head to resist on the three-layer wooden workpiece, which can effectively clamp and position, and the overall automatic positioning clamping makes clamping and positioning more convenient and efficient. The personnel can adjust the distance between the L-shaped adjustment plate and the L-shaped sleeve block according to the thickness of the three-layer wooden workpiece. During adjustment, the personnel loosen the fixing of the locking bolt, so that the L-shaped adjustment plate can adjust the height position in the L-shaped sleeve block, which can effectively change the internal distance between the L-shaped adjustment plate and the L-shaped sleeve block.

[0009] The utility model is further configured as follows: the serrated lifting plate includes an L-shaped panel, a bottom sleeve column, a serrated panel and an anti-slip pin shaft rod, the bottom sleeve column is provided at the lower end of the L-shaped panel, an anti-slip pin shaft rod is provided in the upper end through hole of the L-shaped panel, a serrated panel is provided in the groove of the L-shaped panel, the bottom sleeve column is connected to the elastic resistance column head, the L-shaped panel is connected to the L-shaped adjustment plate, and the serrated panel is engaged with the lifting and lowering adjustment mechanism.

[0010] Through the above technical solution: due to the sawtooth lifting plate structure, it can be used for transmission and lifting.

[0011] The utility model is further configured as follows: the L-shaped adjustment plate includes a rotating sleeve cavity, an inspection cover, a lifting plate sleeve groove, a hollow shell and a movable panel; a movable panel is provided at the lower end of the hollow shell, a rotating sleeve cavity is provided inside the hollow shell, a lifting plate sleeve groove is provided on the outer side of the rotating sleeve cavity and is provided on the hollow shell through-going, an inspection cover is provided on the hollow shell above the rotating sleeve cavity, and the movable panel is connected to the L-shaped sleeve block.

[0012] Through the above technical solution: due to the L-shaped adjustment plate structure, it is convenient to use the limit adjustment.

[0013] The utility model is further configured as follows: the elastic resistance column head includes a bottom rubber sleeve, an upper end column, a resistance spring and a positioning sleeve groove; a positioning sleeve groove is provided on the inner side of the upper end of the upper end column, a resistance spring is provided on the lower end of the upper end column, a bottom rubber sleeve is provided on the outer side of the resistance spring and the upper end column is connected to the serrated lifting plate through the positioning sleeve groove.

[0014] Through the above technical solution: due to the elastic resistance of the column head structure, the elastic resistance clamping and positioning can be used.

[0015] The utility model is further configured as follows: the lifting and lowering adjustment mechanism includes a first coupling, a mounting disc, a rotating motor, a driving gear and a connecting round rod, the peripheral side of the rotating motor is provided with a mounting disc, the front end of the output shaft of the rotating motor is provided with a first coupling, the front end of the first coupling is provided with a connecting round rod, the front end of the connecting round rod is provided with a driving gear, the driving gear is meshed with a serrated lifting plate, and the rotating motor is connected to the L-shaped adjustment plate.

[0016] Through the above technical solution: due to the structure of the lifting and lowering adjustment mechanism, the lifting and lowering adjustment can be automatically performed.

[0017] The utility model is further configured that the lower end of the L-shaped adjustment plate is sleeved in the inner through hole of the upper end of the L-shaped sleeve block.

[0018] Through the above technical solution: because the lower end of the L-shaped adjustment plate is sleeved in the inner through hole of the upper end of the L-shaped sleeve block, installation, fixing and limit adjustment are convenient.

[0019] The utility model is further configured that the sawtooth lifting plate and the L-shaped adjusting plate are connected by sleeve connection, and the sawtooth lifting plate is sleeved in the middle of the inner side of the L-shaped adjusting plate.

[0020] Through the above technical solution: because the sawtooth lifting plate and the L-shaped adjustment plate are connected by sleeve connection, and the sawtooth lifting plate is sleeved in the middle of the inner side of the L-shaped adjustment plate, it is convenient to use the limited lifting.

[0021] The utility model is further configured that the locking bolts are provided with two in total, and the locking bolts are symmetrically arranged on the L-shaped sleeve block.

[0022] Through the above technical solution: since there are two locking bolts in total and the locking bolts are symmetrically arranged on the L-shaped sleeve block, they can be effectively locked and fixed.

[0023] The beneficial effects of the utility model are:

[0024] 1. By providing a lifting and adjusting mechanism structure, automatic lifting and adjusting can be achieved. The rotating motor of the lifting and adjusting mechanism can be fixedly connected to the L-shaped adjusting plate through the screws of the peripheral mounting disc, so that the rotating motor is easy to install and place. When the output shaft of the rotating motor rotates, the rotating motor can drive the first coupling to rotate, the first coupling can drive the connecting round rod to rotate, the connecting round rod can drive the driving gear to rotate, and the driving gear can drive the serrated lifting plate to lift, clamp and position.

[0025] 2. A serrated lifting plate structure is provided, which facilitates transmission and lifting. The serrated panel of the serrated lifting plate is meshed with the driving gear of the lifting and adjusting mechanism. Therefore, when the driving gear of the lifting and adjusting mechanism rotates in the forward direction, the driving gear can drive the serrated panel to move downward, and the serrated panel drives the L-shaped panel to move downward. The L-shaped panel has an anti-drop pin shaft on the inner side of the upper end, which effectively prevents it from falling off when moving downward. The bottom sleeve column at the lower end of the L-shaped panel is connected to the elastic resistance column head. Therefore, when the L-shaped panel moves downward, the L-shaped panel can drive the elastic resistance column head at the lower end of the bottom sleeve column to resist on the three-layer wooden workpiece for positioning and clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a positioning device for bonding three layers of wooden boards proposed by the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a sawtooth lifting plate of a positioning device for bonding three layers of wooden boards proposed by the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of an L-shaped adjustment plate of a positioning device for bonding three layers of wooden boards proposed by the utility model;

[0029] Figure 4 This is a schematic diagram of the elastic abutment column head structure of a positioning device for bonding three layers of wooden boards proposed by the utility model;

[0030] Figure 5 The utility model provides a schematic diagram of the lifting and lowering adjustment mechanism of a positioning device for bonding three layers of wooden boards.

[0031] In the figure: 1. Serrated lifting plate; 11. L-shaped panel; 12. Bottom sleeve column; 13. Serrated panel; 14. Anti-drop pin shaft; 2. Carrying handle rod; 3. L-shaped adjustment plate; 31. Rotating sleeve cavity; 32. Inspection cover; 33. Lifting plate sleeve groove; 34. Hollow shell; 35. Movable panel; 4. Lifting adjustment mechanism; 41. First coupling; 42. Mounting disc; 43. Rotating motor; 44. Driving gear; 45. Connecting round rod; 5. Three-layer wooden workpiece; 6. Anti-slip rubber pad; 7. Elastic resistance column head; 71. Bottom rubber sleeve; 72. Upper end column; 73. Resistance spring; 74. Positioning sleeve groove; 8. L-shaped sleeve block; 9. Locking bolt. DETAILED DESCRIPTION

[0032] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0035] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0036] Reference Figure 1-Figure 5, a positioning device for bonding three layers of wooden boards, comprising an anti-skid rubber pad 6 and an L-shaped sleeve block 8, the anti-skid rubber pad 6 is installed and connected to the inner side of the lower end of the L-shaped sleeve block 8, an L-shaped adjusting plate 3 is arranged on the upper end of the L-shaped sleeve block 8, a locking bolt 9 is arranged at the connection between the L-shaped adjusting plate 3 and the L-shaped sleeve block 8, a carrying handle rod 2 is arranged at the rear end of the L-shaped adjusting plate 3, a serrated lifting plate 1 is arranged on the inner side of the L-shaped adjusting plate 3, a lifting adjustment mechanism 4 is arranged on the outer side of the serrated lifting plate 1 on the L-shaped adjusting plate 3, an elastic resistance column head 7 is arranged at the lower end of the serrated lifting plate 1, a three-layer wooden board workpiece 5 is arranged between the elastic resistance column head 7 and the L-shaped sleeve block 8, the lifting adjustment mechanism 4 is electrically connected to an external controller, and when in use, the three-layer wooden board workpiece 5 is placed on the edge of the external table board, and a person holds the carrying handle 2 at the rear end of the L-shaped adjusting plate 3 The handle rod 2 allows it to be held and carried, and the L-shaped block 8 drives the anti-slip rubber pad 6 to fit under the table top. Then, the external controller is turned on to make the lifting and adjusting mechanism 4 rotate forward, and the lifting and adjusting mechanism 4 drives the serrated lifting plate 1 to descend from the L-shaped adjusting plate 3, so that the serrated lifting plate 1 can drive the lower end elastic contact column head 7 to contact the three-layer wooden workpiece 5, which can effectively clamp and position, and the overall automatic positioning clamping makes clamping and positioning more convenient and efficient. Personnel can adjust the distance between the L-shaped adjusting plate 3 and the L-shaped block 8 according to the thickness of the three-layer wooden workpiece 5. During adjustment, the personnel loosen the fixing of the locking bolt 9, so that the L-shaped adjusting plate 3 can adjust the height position in the L-shaped block 8, which can effectively change the internal distance between the L-shaped adjusting plate 3 and the L-shaped block 8.

[0037] Specifically, the sawtooth lifting plate 1 includes an L-shaped panel 11, a bottom sleeve column 12, a sawtooth panel 13 and an anti-dropout pin shaft 14, the bottom sleeve column 12 is arranged at the lower end of the L-shaped panel 11, the anti-dropout pin shaft 14 is arranged in the upper end through hole of the L-shaped panel 11, the sawtooth panel 13 is arranged in the groove of the L-shaped panel 11, the bottom sleeve column 12 is connected to the elastic abutment column head 7, the L-shaped panel 11 is connected to the L-shaped adjustment plate 3, the sawtooth panel 13 is meshed with the lifting adjustment mechanism 4, and the sawtooth panel 13 of the sawtooth lifting plate 1 is engaged with the driving gear 4 of the lifting adjustment mechanism 4 4 is meshed, so that when the driving gear 44 of the lifting and lowering adjustment mechanism 4 rotates in the forward direction, the driving gear 44 can drive the serrated panel 13 to move downward, and the serrated panel 13 drives the L-shaped panel 11 to move downward. The L-shaped panel 11 is effectively prevented from falling off when moving downward because of the anti-drop pin shaft 14 on the inner side of the upper end. The bottom sleeve column 12 at the lower end of the L-shaped panel 11 is connected to the elastic resistance column head 7. Therefore, when the L-shaped panel 11 moves downward, the L-shaped panel 11 can drive the elastic resistance column head 7 at the lower end of the bottom sleeve column 12 to resist on the three-layer wooden workpiece 5 for positioning and clamping.

[0038] Specifically, the L-shaped adjustment plate 3 includes a rotating sleeve cavity 31, an inspection cover 32, a lifting plate sleeve groove 33, a hollow shell 34 and a movable panel 35. The lower end of the hollow shell 34 is provided with a movable panel 35, and the interior of the hollow shell 34 is provided with a rotating sleeve cavity 31. The outer side of the rotating sleeve cavity 31 is located on the hollow shell 34 and is provided with a lifting plate sleeve groove 33. The upper part of the rotating sleeve cavity 31 is located on the hollow shell 34 and is provided with an inspection cover 32. The movable panel 35 is connected to the L-shaped sleeve block 8. The movable panel 35 of the L-shaped adjustment plate 3 is sleeved and connected to the L-shaped sleeve block 8, so that the movable panel 35 can be adjusted to a height position on the L-shaped sleeve block 8. When the position of the movable panel 35 changes, the movable panel 35 can change the height position of the hollow shell 34. During maintenance, personnel can open the inspection cover 32 to inspect the components inside the rotating sleeve cavity 31. Due to the area of ​​the lifting plate sleeve groove 33, the serrated lifting plate 1 can be limited and lifted for use in the hollow shell 34.

[0039] When the locking cam 75 is in the state of being firmly fixed on the locking cam 74, the locking cam 74, being firmly fixed on the locking cam 74, is swung to the left of the locking cam 74 so as to lock the locking cam 74 in the locking cam 76. When the locking cam 75 is in the state of being firmly fixed on the locking cam 74, the locking cam 74, being firmly fixed on the locking cam 74

[0040] Specifically, the lifting and lowering adjustment mechanism 4 includes a first coupling 41, a mounting disc 42, a rotating motor 43, a driving gear 44 and a connecting rod 45. The rotating motor 43 is provided with a mounting disc 42 on its circumferential side. The output shaft of the rotating motor 43 is provided with a first coupling 41 at the front end. The connecting rod 45 is provided with a driving gear 44 at the front end of the connecting rod 45. The driving gear 44 is meshed with the sawtooth lifting plate 1. The rotating motor 43 is connected to the L-shaped adjustment plate 3. The rotating motor 43 of the lifting and lowering adjustment mechanism 4 can be fixedly connected to the L-shaped adjustment plate 3 through the screws of the mounting disc 42 on the circumferential side, so that the rotating motor 43 is easy to install and place. When the output shaft of the rotating motor 43 rotates, the rotating motor 43 can drive the first coupling 41 to rotate, the first coupling 41 can drive the connecting rod 45 to rotate, the connecting rod 45 can drive the driving gear 44 to rotate, and the driving gear 44 can drive the sawtooth lifting plate 1 to be lifted, clamped and positioned.

[0041] Specifically, the lower end of the L-shaped adjustment plate 3 is sleeved in the inner through hole of the upper end of the L-shaped sleeve block 8, so as to facilitate installation, fixation and limit adjustment.

[0042] Specifically, the sawtooth lifting plate 1 and the L-shaped adjustment plate 3 are connected by sleeve connection, and the sawtooth lifting plate 1 is sleeved in the middle of the inner side of the L-shaped adjustment plate 3, so as to facilitate the use of limited lifting.

[0043] Specifically, there are two locking bolts 9, and the locking bolts 9 are symmetrically arranged on the L-shaped sleeve block 8, so that they can be effectively locked and fixed.

[0044] Working principle: when in use, the three-layer wooden workpiece 5 is placed on the edge of the external table board, and the personnel holds the carrying handle rod 2 at the rear end of the L-shaped adjusting plate 3 so that it can be held and carried, and the L-shaped sleeve block 8 drives the anti-slip rubber pad 6 to fit under the table board, and then turns on the external controller to make the lifting and lowering adjustment mechanism 4 rotate forward, and the lifting and lowering adjustment mechanism 4 drives the serrated lifting plate 1 to descend from the L-shaped adjusting plate 3, so that the serrated lifting plate 1 can drive the lower end elastic contact column head 7 to contact the three-layer wooden workpiece 5, which can effectively clamp and position, and the overall automatic positioning clamping makes clamping and positioning more convenient and efficient. The personnel can adjust the distance between the L-shaped adjusting plate 3 and the L-shaped sleeve block 8 according to the thickness of the three-layer wooden workpiece 5. During adjustment, the personnel loosen the fixing of the locking bolt 9, so that the L-shaped adjusting plate 3 can adjust the height position in the L-shaped sleeve block 8, which can effectively change the internal distance between the L-shaped adjusting plate 3 and the L-shaped sleeve block 8.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning device for bonding three layers of wooden boards, comprising an anti-slip rubber pad (6) and an L-shaped sleeve block (8), characterized in that: The anti-slip rubber pad (6) is installed and connected on the inner side of the lower end of the L-shaped sleeve (8); the upper end of the L-shaped sleeve (8) is provided with an L-shaped adjustment plate (3); the connection between the L-shaped adjustment plate (3) and the L-shaped sleeve (8) is provided with a locking bolt (9); the rear end of the L-shaped adjustment plate (3) is provided with a carrying handle rod (2); the inner side of the L-shaped adjustment plate (3) is provided with a sawtooth lifting plate (1); the outer side of the sawtooth lifting plate (1) is provided with a lifting adjustment mechanism (4) on the L-shaped adjustment plate (3); the lower end of the sawtooth lifting plate (1) is provided with an elastic abutment column head (7); a three-layer wooden workpiece (5) is provided between the elastic abutment column head (7) and the L-shaped sleeve (8); and the lifting adjustment mechanism (4) is electrically connected to an external controller.

2. A positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The sawtooth lifting plate (1) comprises an L-shaped panel (11), a bottom sleeve column (12), a sawtooth panel (13) and an anti-dropout pin shaft (14); the bottom sleeve column (12) is arranged at the lower end of the L-shaped panel (11); the anti-dropout pin shaft (14) is arranged in the through hole at the upper end of the L-shaped panel (11); the sawtooth panel (13) is arranged in the groove of the L-shaped panel (11); the bottom sleeve column (12) is connected to the elastic abutment column head (7); the L-shaped panel (11) is connected to the L-shaped adjustment plate (3); and the sawtooth panel (13) is engaged with the lifting adjustment mechanism (4).

3. A positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The L-shaped adjustment plate (3) comprises a rotating sleeve cavity (31), an inspection cover plate (32), a lifting plate sleeve groove (33), a hollow shell (34) and a movable panel (35); the lower end of the hollow shell (34) is provided with a movable panel (35); the interior of the hollow shell (34) is provided with a rotating sleeve cavity (31); the outer side of the rotating sleeve cavity (31) is provided with a lifting plate sleeve groove (33) on the hollow shell (34); the upper part of the rotating sleeve cavity (31) is provided with an inspection cover plate (32) on the hollow shell (34); and the movable panel (35) is connected to the L-shaped sleeve block (8).

4. A positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The elastic abutment column head (7) comprises a bottom rubber sleeve (71), an upper end column (72), an abutment spring (73) and a positioning sleeve groove (74); the inner side of the upper end of the upper end column (72) is provided with a positioning sleeve groove (74); the lower end of the upper end column (72) is provided with a abutment spring (73); the outer side of the abutment spring (73) is provided with a bottom rubber sleeve (71) on the upper end column (72); the upper end column (72) is connected to the sawtooth lifting plate (1) via the positioning sleeve groove (74).

5. The positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The lifting and lowering adjustment mechanism (4) comprises a first coupling (41), a mounting disc (42), a rotating motor (43), a driving gear (44) and a connecting rod (45); the rotating motor (43) is provided with a mounting disc (42) on its circumferential side; the output shaft of the rotating motor (43) is provided with a first coupling (41) at its front end; the connecting rod (45) is provided at its front end; the driving gear (44) is provided at its front end; the driving gear (44) is meshed with the sawtooth lifting plate (1); and the rotating motor (43) is connected to the L-shaped adjustment plate (3).

6. A positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The lower end of the L-shaped adjustment plate (3) is sleeved in the inner through hole of the upper end of the L-shaped sleeve block (8).

7. A positioning device for bonding three layers of wood boards according to claim 1, characterized in that: The sawtooth lifting plate (1) and the L-shaped adjustment plate (3) are connected by sleeve connection, and the sawtooth lifting plate (1) is sleeved in the middle of the inner side of the L-shaped adjustment plate (3).

8. The positioning device for bonding three layers of wood boards according to claim 1, characterized in that: There are two locking bolts (9) in total, and the locking bolts (9) are symmetrically arranged on the L-shaped sleeve block (8).

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