A multi-section elastic binder laying device for a roll pin production line

Abstract

This invention discloses a multi-segment elastic restraint device for a coil nail production line, relating to the field of coil nail binding technology. The device includes a feeding mechanism and a binding mechanism. A sliding column of the feeding mechanism is fitted inside a hollow threaded column, achieving interference-free preparation of multiple elastic bands through groove engagement. The binding mechanism's restraining mechanism includes a driven downward sliding column and a hinged limiting arc plate. During operation, the sliding column extends downward and spreads the elastic bands. A time-delayed linkage mechanism based on the avoidance groove and the inclined sliding groove triggers the limiting arc plate to rotate and conform to the sliding column, using its inner groove to axially separate and restrain multiple elastic bands. When the cylinder rapidly retracts and pulls away from the sliding column, the elastic bands instantly rebound. Due to the mechanical transmission delay, the limiting arc plate does not have time to reset, ensuring the elastic bands remain separated and are accurately bound to the coil nail reel. This device has a simple structure, effectively prevents loose nails, and facilitates production line modification.

Description

Technical Field

[0001] This invention relates to the field of coil nail binding technology, specifically to a multi-segment elastic restraint device for a coil nail production line. Background Technology

[0002] In the current coil nail production process, after the coil nails are wound into a coil, they are tied with rubber bands and then picked up, transported and packed by a gripping device. Generally, when tying them, manual or mechanical claws are used to open them up, and then the rubber bands are put on the coil nail coil.

[0003] Existing coil nailing mechanical grippers typically have multiple vertically downward cylinders. They use the extension and retraction of cylinder rods and the convergence and opening of multiple cylinders to remove rubber bands from the feeding device. However, in a single binding cycle, existing mechanical grippers can only bind one or more rubber bands to the same height on the coil nailing reel at the same time.

[0004] To improve the gripping force of coil nails, spiral / threaded or ring-shaped patterns are usually added to the coil nails. However, when using a single rubber band for binding, vibration during transportation and friction between the rubber band and the coil nail can easily cause the rubber band to break, causing the coil nail reel in the packaging box to scatter. Moreover, when the coil nails are long nails, even if existing mechanical claws have grabbed multiple rubber bands after releasing them, these rubber bands will be simultaneously bound to the same position on the coil nail reel after the cylinder rod retracts. Due to the lack of axial restraint, under the influence of handling, stacking, and vibration, the coil nail reel is prone to "opening / scattering" (the long coil nails tilt along the position where the rubber bands are bound). If the tilt angle is too large, the weld between the long coil nail and the connecting wire will break, resulting in scattered nails, causing the nail gun to malfunction. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-segment elastic restraint device for a coil nail production line, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-segment elastic restraint component laying device for a coil nail production line, comprising a packaging section, wherein the packaging section includes a base, a feeding mechanism and a binding mechanism; The feeding mechanism includes two hollow threaded columns, and a coaxial sliding column is sleeved inside the threaded columns. The sliding column has multiple grooves. The binding mechanism includes a rotating disk and a support. The support moves along the vertical axis of the rotating disk under the control of a telescopic rod. Two sets of connecting rods are hinged on the support. A limiting mechanism is fixedly sleeved on the connecting rods away from the hinged end. The limiting mechanism includes a fixed cylinder with a limiting arc plate hinged to the bottom surface of the fixed cylinder. The inner side of the limiting arc plate has multiple slots. A sliding column is provided inside the fixed cylinder. When the sliding column moves downward, it extends out of the fixed cylinder and contacts the restraining member in the groove. During the downward sliding process, the limiting arc plate rotates from a horizontal state to fit against the outside of the sliding column, so that the restraining member in contact with the sliding column is restricted by the slots and cannot move along the axial direction of the sliding column.

[0007] Preferably, a drive slider is slidably connected to the inner side of the fixed cylinder, and a drive surface is provided on the drive slider. An avoidance groove is provided on the side of the sliding column. A vertical sliding frame is slidably connected to the inside of the fixed cylinder. An inclined sliding groove is provided on the sliding frame. A drive rod is slidably connected in the inclined sliding groove. The drive rod is fixedly connected to the drive slider.

[0008] Preferably, after the sliding column moves downward to make the top inclined surface of the clearance groove contact the driving surface, the driving slider moves away from the sliding column. When the driving slider moves away from the sliding column, the driving rod drives the sliding frame to move downward.

[0009] Preferably, after the sliding frame moves downward, its bottom end extends out of the bottom surface of the fixed cylinder, and the limiting arc plate is rotated to a vertical state by pushing.

[0010] Preferably, a return spring with one end abutting against the inner wall of the fixed cylinder is sleeved on the drive slider, and the return spring is compressed when the drive slider moves away from the sliding column.

[0011] Preferably, the slots correspond to the grooves on the sliding column, and in the initial state, the uppermost groove and the lowermost slot are at the same vertical height.

[0012] Preferably, a torsion spring is sleeved at the hinge axis between the limiting arc plate and the fixed cylinder so that the limiting arc plate is in a horizontal state without external force.

[0013] Preferably, a mini cylinder is fixedly mounted on the top end of the fixed cylinder, and the telescopic end of the mini cylinder is fixedly connected to the sliding column to drive the sliding column to move linearly.

[0014] Preferably, a drive cylinder is fixed on the bracket, and the drive cylinder drives each set of connecting rods to rotate so that the binding mechanism can open and close. After the binding mechanism opens, it opens the restraint in the groove.

[0015] Preferably, the feeding mechanism further includes an optical sensor, the detection point of which is aligned with the groove at the top of the sliding column in the default state, and the sliding column is controlled to move along the axis of the threaded column.

[0016] The beneficial effects of this invention are as follows: First, the engagement of the inclined surface at the top of the threaded column with the groove on the sliding column allows for the automatic preparation of multiple rubber bands without interference during the binding process. Second, the designed delayed linkage mechanism based on the avoidance groove and the inclined sliding groove ensures that the sliding column first precisely inserts into the rubber band and expands it before triggering the rotation of the limiting arc plate. This completely avoids the rubber band rubbing and wear or material picking failure caused by the premature action of the limiting arc plate. After the limiting arc plate unfolds, its slots can strictly restrict multiple rubber bands to different axial positions. Finally, the rapid retraction characteristic of the mini cylinder allows the sliding column to be instantly withdrawn, causing the rubber bands to spring back and tighten before the limiting arc plate can reset. This successfully and accurately places the separated rubber bands onto the nail coil, effectively preventing the nails from scattering. Moreover, the above structural design is simple and does not require significant modifications to the existing production line. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the packaging section structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the opening structure of the packaging section of the present invention; Figure 5 This is a schematic diagram of the packing section's gathering structure of the present invention; Figure 6 This is a cross-sectional view of the limiting mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged view at point B in the middle; Figure 8 This is a cross-sectional view of the sliding frame structure of the present invention.

[0018] In the diagram: 1. Packaging section; 11. Base; 12. Feeding mechanism; 121. Threaded column; 122. Sliding column; 123. Groove; 124. Optical sensor; 13. Bundling mechanism; 131. Rotating disk; 132. Bracket; 133. Connecting rod; 14. Limiting mechanism; 141. Fixed cylinder; 142. Sliding column; 1421. Clearance groove; 143. Drive slider; 1431. Drive surface; 1432. Drive rod; 144. Sliding frame; 1441. Inclined slide groove; 145. Return spring; 146. Limiting arc plate; 1461. Slot; 15. Mini cylinder; 16. Drive cylinder. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 8As shown in the figure, an embodiment of the present invention provides a multi-segment elastic restraint component laying device for a coil nail production line, including a packaging section 1, which includes a base 11, a feeding mechanism 12 and a binding mechanism 13. The feeding mechanism 12 includes two hollow threaded columns 121, and a coaxial sliding column 122 is sleeved inside the threaded column 121. The sliding column 122 has multiple grooves 123. The binding mechanism 13 includes a rotating disk 131 and a support 132. The support 132 is controlled by a telescopic rod to move along the vertical axis of the rotating disk 131. Two sets of connecting rods 133 are hinged on the support 132. A limiting mechanism 14 is fixedly sleeved on the connecting rods 133 away from the hinge end. The limiting mechanism 14 includes a fixed cylinder 141, with a limiting arc plate 146 hinged to the bottom surface of the fixed cylinder 141. The inner side of the limiting arc plate 146 is provided with multiple slots 1461. A sliding column 142 is provided inside the fixed cylinder 141. When the sliding column 142 moves downward, it extends out of the fixed cylinder 141 and contacts the restraining member in the groove 123. During the downward sliding process, the limiting arc plate 146 rotates from the horizontal state to fit against the outside of the sliding column 142, so that the restraining member in contact with the sliding column 142 is restricted by the slots 1461 and cannot move along the axial direction of the sliding column 142.

[0021] By default, the groove 123 at the top of the sliding post 122 is connected to the top inclined surface of the threaded post 121. When the restraint on the threaded post 121 (specifically a rubber band in this embodiment) moves upward along the thread and enters the top of the threaded post 121, the elastic contraction of the rubber band itself will drive it to slide upward along the top inclined surface of the threaded post 121, thereby directly embedding it into the groove 123. When multiple rubber bands need to be tied to the coil nail disc at the same time, it is only necessary to move the sliding post 122 upward until the subsequent groove 123 is connected to the top inclined surface of the threaded post 121. This preparation process is carried out synchronously during the tying action of the tying mechanism 13 and does not interfere with the tying mechanism 13.

[0022] In this embodiment, a drive slider 143 is slidably connected to the inner side of the fixed cylinder 141. A drive surface 1431 is provided on the drive slider 143. An avoidance groove 1421 is provided on the side of the sliding column 142. A vertical sliding frame 144 is slidably connected to the inside of the fixed cylinder 141. An inclined sliding groove 1441 is provided on the sliding frame 144. A drive rod 1432 is slidably connected in the inclined sliding groove 1441. The drive rod 1432 is fixedly connected to the drive slider 143.

[0023] like Figures 6 to 8As shown, the clearance groove 1421 ensures that the downward movement of the sliding column 142 and the rotation of the limiting arc plate 146 are asynchronous. That is, the driving slider 143 is only pressed into the fixed cylinder 141 after the sliding column 142 has extended a certain length. Therefore, the limiting arc plate 146 will only rotate towards the sliding column 142 after the sliding column 142 is inside the elastic band and in contact with it, and then the elastic band will be limited by the slot 1461. This design avoids the limiting arc plate 146 rotating as soon as the sliding column 142 begins to move, thus applying pressure to the elastic band before it is fully extended, preventing the sliding column 142 from accurately penetrating the elastic band and extending it. It also avoids the sliding column 142 rubbing against the elastic band inside the limiting arc plate 146 during its downward movement due to the premature rotation of the limiting arc plate 146, causing premature wear of the elastic band.

[0024] During the binding process, when the telescopic end of the mini cylinder 15 retracts rapidly, the sliding column 142 is driven to move upwards quickly. Because the retraction of the mini cylinder 15 is a direct pneumatic retraction at extremely high speed, the sliding column 142 instantly disengages from the rubber band, causing the rubber band to spring back and tighten. The resetting of the limiting arc plate 146 from a vertical to a horizontal state requires a mechanical transmission chain: the reset spring 145 releases potential energy to push the drive slider 143 to reset; the drive slider 143 moves the sliding frame 144 upwards through the inclined slide groove 1441 to clear the way; and finally, the torsion spring drives the limiting arc plate 146 to rotate. Since the reset response time of the mechanical transmission chain is necessarily slower than the direct retraction speed of the cylinder, the phenomenon of the limiting arc plate 146 immediately resetting while the sliding column 142 moves upwards will not occur. This ensures that the rubber band is always stably locked in the slot 1461 during the springback binding process and will not slip or overlap.

[0025] In this embodiment, after the sliding column 142 moves downward and the top inclined surface of the clearance groove 1421 contacts the driving surface 1431, the driving slider 143 moves away from the sliding column 142. When the driving slider 143 moves away from the sliding column 142, the driving rod 1432 drives the sliding frame 144 to move downward. After the sliding frame 144 moves downward, its bottom end extends out of the bottom surface of the fixed cylinder 141, and the limiting arc plate 146 is rotated to a vertical state by pushing.

[0026] like Figures 6 to 8 As shown, the bottom of the sliding frame 144 is provided with an inclined surface, which further delays the start time of the limiting arc plate 146 rotating from the horizontal state to the vertical state, ensuring that the limiting arc plate 146 rotates and fits onto the sliding column 142 only after the sliding column 142 is located inside the rubber band.

[0027] In this embodiment, a return spring 145 with one end abutting against the inner wall of the fixed cylinder 141 is sleeved on the drive slider 143. The return spring 145 is compressed when the drive slider 143 moves away from the sliding column 142.

[0028] like Figures 6 to 8 As shown, when the sliding column 142 moves downward and presses the drive slider 143 into the fixed cylinder 141, the return spring 145 is compressed; when the sliding column 142 moves upward and disengages from the drive slider 143, the return spring 145 pushes the drive slider 143 to extend again, thereby causing the sliding frame 144 to move upward and reset (a tension spring can also be provided on the top surface of the sliding frame 144 to assist in the reset). As the sliding frame 144 resets, it no longer obstructs the limiting arc plate 146, and the limiting arc plate 146 resets to its initial horizontal state under the action of the torsion spring provided on its own hinge axis.

[0029] In this embodiment, the slot 1461 corresponds to the groove 123 on the sliding post 122. In the initial state, the uppermost groove 123 and the lowermost slot 1461 are at the same vertical height.

[0030] like Figure 3 and Figure 6 As shown, in this embodiment, there are three grooves 123 and three slots 1461. When the device only needs to lay one rubber band, the sliding column 122 remains stationary. At this time, there is a rubber band in the uppermost groove 123 of the sliding column 122. When the limiting arc plate 146 rotates to the vertical state, the rubber band will be stuck in the lowermost slot 1461 (away from the hinge end).

[0031] In actual binding, the feeding mechanism 12 prepares the required number of rubber bands as needed. Then, as the sliding column 142 in the limiting mechanism 14 moves down, and the binding mechanism 13, driven by the driving cylinder 16, opens, the rubber bands are opened by the sliding column 142 and locked by the limiting arc plate 146 through the slot 1461. When the binding mechanism 13 moves to the outside of the nail coil, the sliding column 142 moves up and returns, and the rubber bands contract under their own elastic force, thus binding them tightly on the nail coil.

[0032] In this embodiment, a torsion spring is sleeved at the hinge axis between the limiting arc plate 146 and the fixed cylinder 141 so that the limiting arc plate 146 is in a horizontal state without external force.

[0033] Since the limiting arc plate 146 is in a horizontal state without external force, when the rotating disk 131 rotates and the limiting mechanism 14 is aligned with the inner area of ​​the rubber band, the limiting arc plate 146 will not interfere with the rubber band, ensuring that the rubber band is in an accurate position before material is picked up, and thus ensuring that the rubber band will not slide along the surface of the sliding column 142 during subsequent binding.

[0034] In this embodiment, a mini cylinder 15 is fixedly provided at the top of the fixed cylinder 141. The telescopic end of the mini cylinder 15 is fixedly connected to the sliding column 142 to drive the sliding column 142 to move linearly.

[0035] Compared to existing technologies that only use a mini cylinder 15 to pick up and put in a single rubber band, this invention achieves the simultaneous picking up of multiple rubber bands from the feeding mechanism 12 and then binding the multiple rubber bands separately onto the nail coil by adding a simple structure, without requiring significant modifications to the existing production line or the addition of step-by-step binding equipment.

[0036] In this embodiment, a drive cylinder 16 is fixed on the bracket 132. The drive cylinder 16 drives each set of connecting rods 133 to rotate so that the binding mechanism 13 can open and close. After the binding mechanism 13 opens, it will open the restraint in the groove 123.

[0037] In this embodiment, the feeding mechanism 12 also includes an optical sensor 124. The detection point of the optical sensor 124 is aligned with the groove 123 at the top of the sliding column 122 in the default state. The sliding column 122 is controlled to move along the axis of the threaded column 121.

[0038] When the optical sensor 124 detects that there is a rubber band in the groove 123, it determines whether the sliding column 122 needs to be moved upward according to the current program configuration. After the sliding column 122 is moved upward, the groove 123 will be at the detection position of the optical sensor 124, thereby supplying different numbers of rubber bands as needed.

[0039] Working principle: First, the number of rubber bands to be bundled at one time is set according to the length of the coil nail. The feeding mechanism 12 controls the sliding column 122 to move upward, completing the preparation of the corresponding number of rubber bands. Then, the binding mechanism 13 is driven to rotate, so that the limiting mechanism 14 is aligned with the center area of ​​the rubber band.

[0040] The mini cylinder 15 is activated, and its telescopic end extends, driving the sliding column 142 to penetrate the area enclosed by the rubber band. Simultaneously, the drive cylinder 16 operates, causing the connecting rod 133 to open, allowing the sliding column 142 to move outwards as it penetrates the rubber band, gradually expanding it. Once the sliding column 142 has extended a preset length, the clearance groove 1421 triggers the drive slider 143 to slide into the fixed cylinder 141, thereby causing the sliding frame 144 to move downwards. The sliding frame 144 then pushes the limiting arc plate 146 to rotate to a vertical position against the outside of the sliding column 142. At this point, the rubber band, expanded by the sliding column 142, is precisely engaged in the corresponding slot 1461 on the limiting arc plate 146, achieving axial separation and limiting of multiple rubber bands.

[0041] After material handling is completed, the binding mechanism 13 rotates above the nail coil, and the bracket 132 moves down, allowing the stretched and separated rubber bands to be fitted onto the outside of the nail coil. Then, the mini cylinder 15 is controlled to retract rapidly, and the sliding column 142 instantly disengages from the rubber band. The rubber band, under its own elastic force, quickly contracts and tightens onto the nail coil. During this instantaneous retraction, due to the reset delay of the mechanical transmission link, the limiting arc plate 146 does not have time to rotate and reset. Under the blocking and limiting effect of the slot 1461, the rubber band will not slide axially as the sliding column 142 moves upward, thus ensuring that multiple rubber bands are accurately bound to the nail coil in a separated state.

[0042] Finally, the bracket 132 moves upward and resets, the drive cylinder 16 retracts and drives the connecting rod 133 to close, and at the same time the limiting arc plate 146 returns to the initial horizontal state under the action of the reset spring 145 and the torsion spring, completing the reset of the entire laying and binding cycle.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-segment elastic restraint device for a coil nail production line, comprising a packaging unit (1), characterized in that: The packaging unit (1) includes a base (11), a feeding mechanism (12), and a bundling mechanism (13). The feeding mechanism (12) includes two hollow threaded columns (121), and a coaxial sliding column (122) is sleeved inside the threaded column (121). The sliding column (122) has multiple grooves (123). The binding mechanism (13) includes a rotating disk (131) and a support (132). The support (132) is controlled by a telescopic rod to move along the vertical axis of the rotating disk (131). Two sets of connecting rods (133) are hinged on the support (132). A limiting mechanism (14) is fixedly sleeved on the connecting rods (133) away from the hinge end. The limiting mechanism (14) includes a fixed cylinder (141), with a limiting arc plate (146) hinged to the bottom surface of the fixed cylinder (141). The inner side of the limiting arc plate (146) is provided with multiple slots (1461). A sliding column (142) is provided inside the fixed cylinder (141). When the sliding column (142) moves downward, it extends out of the fixed cylinder (141) and contacts the restraint in the groove (123). During the downward sliding process, the limiting arc plate (146) rotates from the horizontal state to fit against the outside of the sliding column (142), so that the restraint in contact with the sliding column (142) is restricted by the slots (1461) and cannot move along the axial direction of the sliding column (142).

2. The multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: The inner side of the fixed cylinder (141) is slidably connected to a drive slider (143), the drive slider (143) is provided with a drive surface (1431), the side of the sliding column (142) is provided with a clearance groove (1421), the inside of the fixed cylinder (141) is slidably connected to a vertical sliding frame (144), the sliding frame (144) is provided with an inclined sliding groove (1441), the inclined sliding groove (1441) is slidably connected to a drive rod (1432), and the drive rod (1432) is fixedly connected to the drive slider (143).

3. The multi-segment elastic restraint device for a coil nail production line according to claim 2, characterized in that: After the sliding column (142) moves downward and the top inclined surface of the clearance groove (1421) contacts the driving surface (1431), the driving slider (143) moves away from the sliding column (142). When the driving slider (143) moves away from the sliding column (142), the driving rod (1432) drives the sliding frame (144) to move downward.

4. The multi-segment elastic restraint device for a coil nail production line according to claim 2, characterized in that: After the sliding frame (144) moves downward, its bottom end extends out of the bottom surface of the fixed cylinder (141), and the limiting arc plate (146) is rotated to a vertical state by pushing.

5. The multi-segment elastic restraint device for a coil nail production line according to claim 2, characterized in that: A return spring (145) with one end abutting against the inner wall of the fixed cylinder (141) is fitted on the drive slider (143). The return spring (145) is compressed when the drive slider (143) moves away from the sliding column (142).

6. The multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: The slot (1461) corresponds to the groove (123) on the sliding column (122). In the initial state, the uppermost groove (123) and the lowermost slot (1461) are at the same vertical height.

7. The multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: A torsion spring is fitted at the hinge axis between the limiting arc plate (146) and the fixed cylinder (141) so that the limiting arc plate (146) is in a horizontal state without external force.

8. The multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: The top of the fixed cylinder (141) is fixedly provided with a mini cylinder (15), and the telescopic end of the mini cylinder (15) is fixedly connected to the sliding column (142) to drive the sliding column (142) to move linearly.

9. The multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: A drive cylinder (16) is fixed on the bracket (132). The drive cylinder (16) drives each set of connecting rods (133) to rotate so that the binding mechanism (13) opens and closes. After the binding mechanism (13) opens, it opens the restraint in the groove (123).

10. A multi-segment elastic restraint device for a coil nail production line according to claim 1, characterized in that: The feeding mechanism (12) also includes an optical sensor (124), the detection point of which is aligned with the groove (123) at the top of the sliding column (122) in the default state, and the sliding column (122) is controlled to move along the axis of the threaded column (121).

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