A loose nailing device for wooden pallets

Abstract

A loose nailing device for wooden pallets includes a horizontal frame, the lower part of which is for semi-finished pallets to pass through, a plurality of supporting slides are provided on the horizontal frame, and the supporting slides can be slid to adjust their positions in the horizontal direction of the horizontal frame, and a nailing unit is provided on the supporting slide. The nailing unit is used for nailing operations at the positions of various foot blocks of the semi-finished pallet. The nailing unit includes a frame and a nailing assembly provided on the frame, and the frame is connected to the supporting slide by a lifting cylinder. A rotatable large gear and a driving mechanism for driving the large gear to rotate are provided on the bottom frame of the frame, and an eccentric hole is processed on the disk surface of the large gear. The nail head of the nailing assembly is arranged in the eccentric hole through a bearing a.

Description

Technical Field

[0001] The invention relates to a loose nail driving device for a wooden pallet. Background Art

[0002] After the wooden planks and foot blocks are stacked to form a semi-finished pallet, nails are driven into the foot blocks by a nailing machine to form a fixed structure between the planks and the foot blocks, thus obtaining the required wooden pallet. Usually, two or three nails are driven into a single foot block of a wooden pallet. Figure 9 The figure shows the situation of driving two nails. Figure 10 Shown is the driving of three nails.

[0003] The handheld nailing machine can drive multiple nails into the foot block, and the nailing position is determined by the operator, which has the problems of high labor intensity and low work efficiency. The current production workshop also has automatic nailing equipment for wooden pallets. The semi-finished pallets placed on the push frame can be pushed under the nailing equipment to achieve nailing. Specifically, when it comes to nails in different positions on a single foot block, the existing equipment relies on the longitudinal movement of the push frame combined with the lateral movement of the nailing assembly to achieve the adjustment of the nail position through combined movement. The adjustment process is time-consuming, which restricts the work efficiency of the entire automatic nailing equipment. Summary of the Invention

[0004] In order to solve the above-mentioned problems, the present invention provides a loose nailing device for a wooden pallet.

[0005] To achieve the above-mentioned object, the present invention provides a loose nailing device for a wooden pallet, comprising:

[0006] A horizontal frame, the lower portion of which is for semi-finished product pallets to pass through, and a plurality of supporting slides are provided on the horizontal frame, and the supporting slides can be slid to achieve position adjustment in the transverse direction of the horizontal frame;

[0007] A nailing unit, the nailing unit is arranged on the supporting slide, and the nailing unit is used for nailing operations at the positions of each foot block of the semi-finished pallet;

[0008] The nailing unit includes a frame and a nailing assembly mounted on the frame, the frame being connected to the support slide via a lifting cylinder, a rotatable large gear and a driving mechanism for driving the large gear to rotate being disposed on the bottom frame of the frame, an eccentric hole being machined on the disk surface of the large gear, and the nail head of the nailing assembly being disposed in the eccentric hole via a bearing a;

[0009] To ensure the overall stability of the nailing assembly, a plurality of universal wheel assemblies are installed on the nailing assembly, and the ball bearings at the bottom of the universal wheel assembly slide and fit on the upper surface of the large gear. A connecting rod frame is fixed on the top of the nailing assembly, and a guide block is fixed on the upper part of the side frame of the frame. A rotatable connecting rod is provided on the connecting rod frame, and the outer end of the connecting rod extends into the guide hole of the guide block.

[0010] Furthermore, the large gear forms a rotatable structure with the base frame through a large bearing, and a plurality of circumferentially distributed steel balls are arranged between the large gear and the base frame, so that a plane bearing structure is formed between the two.

[0011] Furthermore, the driving mechanism includes a driving motor, a driving gear provided at an output end of the driving motor, and an intermediate gear for transmitting and connecting the driving gear and the large gear.

[0012] Furthermore, the nail driving assembly also includes a nail guide disc housing, a nail guide disc, a ratchet, a ratchet positioning mechanism, a push rod piston mechanism, and a nail guide tube. The nail guide disc is rotatably arranged in the nail guide disc housing through a bearing b. A plurality of nail grooves for accommodating nails are evenly opened on the circumferential surface of the nail guide disc. The ratchet is fixedly connected to the nail guide disc by a bolt and rotates synchronously with the nail guide disc. The ratchet positioning mechanism is arranged on one side of the ratchet to enable the ratchet to rotate in one direction, and the push rod piston mechanism is arranged on the other side of the ratchet to drive the ratchet to rotate successively to set Angle, the nail guide tube is vertically fixedly connected to the nail guide disk shell, the feeding channel of the nail guide tube corresponds to one of the nail grooves of the nail guide disk, so that the nail falls into the nail groove from the nail guide tube, the nail head is fixed on the nail guide disk shell, the middle part of the nail head is processed with a through hole, and a magnet is also provided inside the nail head, the magnet is located on one side of the through hole and attracts the nails in the adjacent nail grooves to the through hole through magnetic force, and the reciprocating firing pin moves along the axial direction of the through hole to eject the nail in the through hole to realize the nailing action.

[0013] Furthermore, the ratchet positioning mechanism includes a positioning sleeve fixed on the guide nail plate housing, a positioning pin built into the positioning sleeve, and a first spring supporting the positioning pin. The positioning pin acts on the teeth of the ratchet through the inclined surface on the left side so that the ratchet only rotates counterclockwise.

[0014] Furthermore, the push rod piston mechanism includes a solenoid valve, a cylinder, and a push rod assembly. The cylinder is fixed on the guide nail disk housing, the cylinder shaft of the cylinder is arranged along the tangential direction of the ratchet, the push rod assembly is fixed on the axial end of the cylinder shaft, and the solenoid valve is fixed on the guide nail disk housing. The solenoid valve realizes the reciprocating motion of the push rod assembly by controlling the reversing of the air path of the cylinder.

[0015] Furthermore, the push rod assembly includes a push rod sleeve fixed on the cylinder shaft, a push rod built into the push rod sleeve, and a second spring supporting the push rod. The push rod acts on the inclined surface on the right side with the teeth of the ratchet, driving the ratchet to rotate counterclockwise by a set angle one by one.

[0016] Furthermore, a first opening slot is provided on the nail guide plate shell, and a second opening slot is provided on the nail head. The first opening slot is connected to the second opening slot to facilitate the transfer of the nail from the nail slot to the through hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the nail head of the nailing assembly is eccentrically installed at the eccentric hole of the large gear, and the nailing assembly, the large gear, the connecting rod, and the guide block together form a crank slider structure. When nailing, the rotation angle of the large gear can be controlled by the driving motor, and the position adjustment of the nail head can be quickly achieved, which greatly improves the nailing efficiency. The device structure is compact and reasonable. On a foot block of a wooden pallet, multiple loose nails can be driven in, and the multiple driven loose nails are distributed in a circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a loose nailing device for a wooden pallet according to the present invention;

[0019] Figure 2 This is a schematic diagram of the horizontal frame involved in this scheme;

[0020] Figure 3 Schematic diagram of the support slide and nailing unit involved in this solution;

[0021] Figure 4 for Figure 3 Exploded view of the nailing unit in;

[0022] Figure 5 for Figure 4 Exploded view of the middle frame section;

[0023] Figure 6 for Figure 4 Exploded view of the nailing assembly;

[0024] Figure 7 is a schematic cross-sectional structural diagram of the nailing unit involved;

[0025] Figure 8 Schematic diagram of the transmission structure of the drive assembly and the large gear involved;

[0026] Figure 9 A diagram of a wooden pallet with two nails hammered into it;

[0027] Figure 10This is a diagram of a wooden pallet with three nails hammered into it;

[0028] Figure 11 A structural diagram of the nailing assembly involved;

[0029] Figure 12 for Figure 11 Exploded view of part;

[0030] Figure 13 for Figure 11 a cross-sectional view of a part;

[0031] Figure 14 It is a structural diagram of the ratchet positioning mechanism and the push rod piston mechanism;

[0032] Figure 15 Schematic diagram of the nail guide disc driving the nail to rotate

[0033] In the figure: 1, cross frame; 2, supporting slide; 3, nailing unit; 4, lifting cylinder; 5, frame; 51, bottom frame; 52, side frame; 6, nailing assembly; 61, nail head; 611, through hole; 612, second opening slot; 62, nail guide plate housing; 621, first opening slot; 63, nail guide plate; 631, nail slot; 64, ratchet; 65, ratchet positioning mechanism; 651, positioning sleeve; 652, positioning pin; 653, first spring; 66, push rod piston mechanism; 661, solenoid valve; 662, cylinder; 6 621. Cylinder shaft; 663. Push rod assembly; 6631. Push rod sleeve; 6632. Push rod; 6633. Second spring; 67. Nail guide tube; 68. Bearing b; 69. Magnet; 7. Large gear; 71. Eccentric hole; 8. Driving mechanism; 81. Driving motor; 82. Driving gear; 83. Intermediate gear; 9. Bearing a; 10. Universal wheel assembly; 101. Ball; 11. Connecting rod frame; 12. Connecting rod; 13. Guide block; 131. Guide hole; 14. Large bearing; 15. Steel ball; 16. Nail. DETAILED DESCRIPTION

[0034] like Figure 1 、 Figure 2 and Figure 3 As shown, a loose nail nailing device for wooden pallets according to an embodiment of the present invention includes a horizontal frame 1, the lower portion of the horizontal frame 1 is for semi-finished pallets to pass through, and three supporting slides 2 are provided on the horizontal frame 1. The supporting slides 2 can be slid to adjust their positions in the horizontal direction of the horizontal frame 1. After the positions of the supporting slides 2 are adjusted, they are locked to fix their positions. In this way, the three supporting slides 2 can be adjusted to be used for nailing wooden pallets of different widths; each supporting slide 2 is equipped with a nailing unit 3, which is used for nailing the positions of the various foot blocks of the semi-finished pallet;

[0035] like Figures 3-5As shown, the nailing unit 3 includes a frame 5 and a nailing assembly 6 mounted on the frame 5. The frame 5 is connected to the support slide 2 via a lifting cylinder 4. A rotatable large gear 7 and a driving mechanism 8 for driving the large gear 7 are disposed on the base 51 of the frame 5. An eccentric hole 71 is machined on the disk surface of the large gear 7. The nail head 61 of the nailing assembly 6 is disposed in the eccentric hole 71 via a bearing a9.

[0036] like Figure 6 、 Figure 7 As shown, when the large gear 7 rotates, in order to ensure the overall stability of the nailing assembly 6, four universal wheel assemblies 10 are installed on the nailing assembly 6. The ball bearings 101 at the bottom of the universal wheel assembly 10 slide and fit on the upper surface of the large gear 7. A connecting rod frame 11 is fixed on the top of the nailing assembly 6. A guide block 13 is fixed on the upper part of the side frame 52 of the frame 5. A rotatable connecting rod 12 is provided on the connecting rod frame 11. The outer end of the connecting rod 12 extends into the guide hole 131 of the guide block 13.

[0037] like Figure 5 、 Figure 7 As shown, in order to ensure the stable rotation of the large gear 7, the large gear 7 forms a rotatable structure with the base frame 51 through a large bearing 14. A plurality of circumferentially distributed steel balls 15 are also arranged between the large gear 7 and the base frame 51, so that a plane bearing structure is formed between the two.

[0038] like Figure 7 、 Figure 8 As shown, the driving mechanism 8 includes a driving motor 81, a driving gear 82 provided at the output end of the driving motor 81, and an intermediate gear 83 for transmission connection between the driving gear 82 and the large gear 7;

[0039] like Figures 11-13As shown, the nail driving assembly 6 also includes a nail guide disc housing 62, a nail guide disc 63, a ratchet 64, a ratchet positioning mechanism 65, a push rod piston mechanism 66, and a nail guide tube 67. The nail guide disc 63 is rotatably arranged in the nail guide disc housing 62 through a bearing b68. Twenty-four nail grooves 631 for accommodating nails 16 are evenly opened on the circumferential surface of the nail guide disc 63. The ratchet 64 is fixedly connected to the nail guide disc 63 by bolts and rotates synchronously with the nail guide disc 63. The ratchet positioning mechanism 65 is arranged on one side of the ratchet 64 to enable the ratchet 64 to rotate in one direction. The push rod piston mechanism 66 is arranged on the other side of the ratchet 64 to drive the ratchet 64 to rotate successively by a set angle. The nail guide tube 67 is vertically fixedly connected to the nail guide disk housing 62. The feeding channel of the nail guide tube 67 corresponds to one of the nail grooves 631 of the nail guide disk 63, so that the nail 16 can fall from the nail guide tube 67 into the nail groove 631. The nail head 61 is fixed to the nail guide disk housing 62. A through hole 611 is machined in the middle of the nail head 61. A magnet 69 is also provided inside the nail head 61. The magnet 69 is located on one side of the through hole 611 and attracts the nail 16 in the adjacent nail groove 631 to the through hole 611 through magnetic force. The reciprocating striker moves along the axial direction of the through hole 611 to eject the nail 16 in the through hole 611 to achieve the nailing action.

[0040] like Figure 14 As shown, the ratchet positioning mechanism 65 includes a positioning sleeve 651 fixed on the guide nail disk housing 62, a positioning pin 652 built into the positioning sleeve 651 and a first spring 653 supporting the positioning pin 652. The positioning pin 652 acts on the gear teeth of the ratchet 64 through the inclined surface on the left side, so that the ratchet 64 can only rotate counterclockwise; the push rod piston mechanism 66 includes a solenoid valve 661, a cylinder 662, and a push rod assembly 663. The cylinder 662 is fixed on the guide nail disk housing 62. The cylinder shaft 6621 of the cylinder 662 is set along the tangential direction of the ratchet 64. Rod assembly 663 is fixed to the end of cylinder shaft 6621, and solenoid valve 661 is fixed to nail guide disk housing 62. Solenoid valve 661 controls the reversing of the air path of cylinder 662, thereby achieving reciprocating motion of push rod assembly 663. Push rod assembly 663 includes a push rod sleeve 6631 fixed to the cylinder shaft, a push rod 6632 built into push rod sleeve 6631, and a second spring 6633 supporting push rod 6632. The push rod 6632, through the inclined surface on the right side, interacts with the teeth of ratchet 64, driving ratchet 64 to rotate counterclockwise through a set angle.

[0041] like Figure 15 As shown, a first opening slot 621 is formed on the nail guide plate housing 62 , and a second opening slot 612 is formed on the nail head 61 . The first opening slot 621 is connected to the second opening slot 612 to facilitate the transfer of the nail 16 from the nail slot 631 to the through hole 611 .

[0042] The nail head of the nailing assembly is eccentrically installed in the eccentric hole of the large gear. The nailing assembly, the large gear, the connecting rod, and the guide block together form a crank slider structure. When nailing, the rotation angle of the large gear can be controlled by the driving motor, and the position of the nail head can be quickly adjusted, which greatly improves the nailing efficiency. The device structure is compact and reasonable. Multiple loose nails can be driven into a foot block of a wooden pallet, and the multiple driven loose nails are distributed in a circle.

[0043] In order to facilitate understanding of the present invention, the following description will be given in conjunction with the accompanying drawings when it is used in practice.

[0044] The rotation of the nail guide plate 63 is as follows: The rotation of the nail guide plate 63 is consistent with the rotation of the ratchet wheel 64. Figure 14 The first spring 653 makes the positioning pin 652 continuously press the ratchet 64. The left side of the positioning pin 652 is processed with a bevel, so that the ratchet 64 can rotate counterclockwise (the positioning pin 652 overcomes the elastic force of the first spring 653 and contracts), and the clockwise rotation of the ratchet 64 is restricted. The solenoid valve 661 causes the cylinder shaft 6621 to reciprocate by reversing, and the push rod assembly 663 realizes synchronous reciprocating movement. When moving left, the push rod 6632 forces the ratchet 64 to rotate counterclockwise by a set angle (15 degrees). When moving right, the right side of the push rod 6632 is processed with a bevel, so that the push rod 6632 overcomes the elastic force of the second spring 6633 and contracts. When moving right, the ratchet 64 does not rotate, thus realizing a telescopic movement of the cylinder 662, and the nail guide plate 63 rotates counterclockwise by a set angle, shifting the position of the nail 16 once.

[0045] The upper end of the nail guide tube 67 is connected to the vibrating plate through a hose. The vibrating plate supplies individual nails 16 in an orderly manner (the pointed end of the nail faces downward). The nails 16 fall into the corresponding nail grooves 631 in turn and are transferred as the nail guide plate 63 rotates. When the nail 16 rotates to the first opening groove 621, the magnet 69 attracts the nail 16 and passes through the first opening groove 621 and the second opening groove 612 to the through hole 611 of the nail head 61 (see Figure 15 ), the situation when the nail 16 is adsorbed is as follows Figure 13 As shown, after that, the nailing machine installed on the upper part of the nail head 61 drives the striker to move downward to knock out the adsorbed nail 16 to achieve nailing. The nailing machine is an existing pneumatic nailing machine structure and will not be described in detail here.

[0046] The lifting cylinder 4 can lift the nailing unit 3 so that the semi-finished wooden pallet passes below. When the foot block of the semi-finished wooden pallet reaches just below the nail head 61, the lifting cylinder 4 lowers the nailing unit 3 to perform the nailing operation.

[0047] During the rotation of the large gear 7, since the nail head 61 is eccentrically arranged at the eccentric hole 71, the nail head 61 changes with the rotation position of the large gear 7, that is, the nailing position is adjusted. During the rotation, below the nailing assembly 6, the ball 101 at the bottom of the universal wheel assembly 10 slides and fits on the upper surface of the large gear 7, and above the nailing assembly 6, the connecting rod 12 performs telescopic movement in the guide hole 131 of the guide block 13, so that the overall angle of the nailing assembly 6 is adjusted in real time, while ensuring the stability of the nailing assembly 6.

[0048] When processing is required Figure 9 When the wooden pallet is being processed, the driving motor 81 controls the large gear 7 to rotate 180 degrees. One rotation means nailing at two positions. Figure 10 When the wooden pallet is being pressed, the driving motor 81 controls the large gear 7 to rotate 120 degrees, and rotates twice, that is, nails are hammered in at three positions.

[0049] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A loose nailing device for wooden pallets, characterized by: include A horizontal frame (1), wherein the lower portion of the horizontal frame (1) is for semi-finished product pallets to pass through, and a plurality of supporting slides (2) are provided on the horizontal frame (1), and the supporting slides (2) can be slid to achieve position adjustment in the transverse direction of the horizontal frame (1); A nailing unit (3), the nailing unit (3) being arranged on the supporting slide (2), and the nailing unit (3) being used for nailing operations at the positions of the respective foot blocks of the semi-finished product pallet; The nailing unit (3) includes a frame (5) and a nailing assembly (6) arranged on the frame (5), the frame (5) is connected to the supporting slide (2) through a lifting cylinder (4), a rotatable large gear (7) and a driving mechanism (8) for driving the large gear (7) to rotate are arranged on the bottom frame (51) of the frame (5), an eccentric hole (71) is processed on the disk surface of the large gear (7), and the nail head (61) of the nailing assembly (6) is arranged in the eccentric hole (71) through a bearing a (9); In order to ensure the overall stability of the nailing assembly (6), a plurality of universal wheel assemblies (10) are installed on the nailing assembly (6), and the ball bearings (101) at the bottom of the universal wheel assembly (10) are slidably fitted on the upper surface of the large gear (7). A connecting rod frame (11) is fixed on the top of the nailing assembly (6), and a guide block (13) is fixed on the upper part of the side frame (52) of the frame (5). A rotatable connecting rod (12) is provided on the connecting rod frame (11), and the outer end of the connecting rod (12) extends into the guide hole (131) of the guide block (13).

2. The loose nail driving device for wooden pallets according to claim 1, characterized in that: The large gear (7) forms a rotatable structure with the base frame (51) through a large bearing (14), and a plurality of circumferentially distributed steel balls (15) are also arranged between the large gear (7) and the base frame (51), so that a plane bearing structure is formed between the two.

3. The loose nail driving device for wooden pallets according to claim 2, characterized in that: The driving mechanism (8) includes a driving motor (81), a driving gear (82) provided at the output end of the driving motor (81), and an intermediate gear (83) for transmission connection between the driving gear (82) and the large gear (7).

4. The loose nail driving device for wooden pallets according to claim 1, characterized in that: The nail driving assembly (6) further comprises a nail guide disc housing (62), a nail guide disc (63), a ratchet (64), a ratchet positioning mechanism (65), a push rod piston mechanism (66), and a nail guide tube (67). The nail guide disc (63) is rotatably arranged in the nail guide disc housing (62) via a bearing b (68). A plurality of nail grooves (631) for accommodating nails (16) are evenly provided on the circumferential surface of the nail guide disc (63). The ratchet (64) is fixedly connected to the nail guide disc (63) via a bolt and rotates synchronously with the nail guide disc (63). The ratchet positioning mechanism (65) is arranged on one side of the ratchet (64) to enable the ratchet (64) to rotate in one direction. The push rod piston mechanism (66) is arranged on the other side of the ratchet (64) to drive the ratchet (64) to rotate successively by a set angle. The nail tube (67) is vertically fixedly connected to the nail guide disk housing (62), and the feeding channel of the nail guide tube (67) corresponds to one of the nail grooves (631) of the nail guide disk (63) so that the nail (16) can fall from the nail guide tube (67) into the nail groove (631). The nail head (61) is fixed on the nail guide disk housing (62), and a through hole (611) is processed in the middle of the nail head (61). A magnet (69) is also provided inside the nail head (61). The magnet (69) is located on one side of the through hole (611) and attracts the nail (16) in the adjacent nail groove (631) to the through hole (611) through magnetic force. The reciprocating striker moves along the axial direction of the through hole (611) to shoot the nail (16) in the through hole (611) to realize the nailing action.

5. The loose nail driving device for wooden pallets according to claim 4, characterized in that: The ratchet positioning mechanism (65) comprises a positioning sleeve (651) fixed on the nail guide disk housing (62), a positioning pin (652) built into the positioning sleeve (651), and a first spring (653) supporting the positioning pin (652). The positioning pin (652) acts on the teeth of the ratchet (64) through the inclined surface on the left side, so that the ratchet (64) rotates only in the counterclockwise direction.

6. The loose nail driving device for wooden pallets according to claim 5, characterized in that: The push rod piston mechanism (66) includes a solenoid valve (661), a cylinder (662), and a push rod assembly (663). The cylinder (662) is fixed on the nail guide disk housing (62). The cylinder shaft (6621) of the cylinder (662) is arranged along the tangential direction of the ratchet (64). The push rod assembly (663) is fixed to the shaft end of the cylinder shaft (6621). The solenoid valve (661) is fixed on the nail guide disk housing (62). The solenoid valve (661) realizes the reciprocating motion of the push rod assembly (663) by controlling the reversing of the air path of the cylinder (662).

7. The loose nail driving device for a wooden pallet according to claim 6, characterized in that: The push rod assembly (663) includes a push rod sleeve (6631) fixed on the cylinder shaft, a push rod (6632) built into the push rod sleeve (6631), and a second spring (6633) supporting the push rod (6632). The push rod (6632) acts on the teeth of the ratchet (64) through the inclined surface on the right side, driving the ratchet (64) to rotate counterclockwise to a set angle one by one.

8. The loose nail driving device for wooden pallets according to claim 7, characterized in that: A first opening slot (621) is provided on the nail guide plate housing (62), and a second opening slot (612) is provided on the nail head (61). The first opening slot (621) and the second opening slot (612) are connected to each other so as to facilitate the transfer of the nail (16) from the nail slot (631) to the through hole (611).

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