Automatic assembling device for supporting legs of back plate of photo frame

Abstract

The invention discloses an automatic assembling device for photo frame back plate supporting feet, which comprises a working table, and a back plate feeding mechanism, a supporting foot feeding mechanism, a hinge feeding mechanism, a riveting pressing mechanism and a riveting bearing mechanism are arranged on the working table. After the back plate, the supporting feet and the hinges are conveyed in place by the respective feeding mechanisms, the gap problem existing at the joint of the back plate, the supporting feet and the hinges is eliminated through pre-tightening, and then the back plate, the supporting feet and the hinges are pressed to achieve riveting, so that the assembling quality is guaranteed, the qualified rate of finished products is improved, the assembling efficiency is also improved, and the production cost is effectively reduced. The whole set of feeding, butt joint and riveting is automatic and unattended, and the automation degree is high; storage and feeding of the back plate and the supporting legs can be adaptively adjusted according to different dimensions, and production flexibility is good.

Description

Technical Field

[0001] The present invention relates to the technical field of photo frame processing equipment, and more specifically to an automatic assembling device for the backboard support feet of a photo frame. Background Art

[0002] In the field of photo frame production and manufacturing, the assembly of the photo frame backboard and the support feet is a crucial and indispensable link.

[0003] The traditional assembly method of the photo frame backboard and the support feet mainly relies on manual operation. The manual assembly is slow, the production efficiency is low, and the accuracy of the manual operation is affected by factors such as the proficiency and fatigue of the workers. It is difficult to ensure that the assembly quality of each photo frame is exactly the same, and problems such as skewed installation and insecure fixation of the support feet are likely to occur, reducing the product qualification rate and increasing the defective rate and after-sales maintenance cost.

[0004] In order to improve the production efficiency, some automatic assembly devices for photo frame backboards and support feet have also emerged on the market: for example, the patent application number CN202411057476.9 discloses an automatic binding device for a photo frame backboard and feet. Above the chassis, there is a backboard feeding mechanism, which includes a backboard buffer rack and two guide rails. Among them, the two guide rails are installed in parallel above the chassis, and the backboard buffer rack is installed at one end above the guide rails. Above the chassis, there is also a binding mechanism located above the guide rails. On one side above the chassis, there is a vibrating disk, and on one side of the vibrating disk above the chassis, there is a hinge feeding mechanism. On one side of the guide rails above the chassis, there is also a support foot feeding mechanism.

[0005] Another example is the patent application number CN201921570010.3, which discloses a riveting device for pressing buttons on a photo frame backboard, having a machine base, a first feeding unit, a second feeding unit, a positioning pin and a riveting punch. The first feeding unit has a first guiding arm, and the second feeding unit has a second guiding arm. The first guiding arm and the second guiding arm respectively guide the button body and the sleeve to the riveting station, and realize the upper and lower alignment of the sleeve and the button body; the positioning pin has a telescopic property, and the positioning pin extends through the sleeve exported by the second guiding arm in series and the button body exported by the first guiding arm, giving the sleeve and the button body riveting alignment; the riveting punch is arranged above the riveting seat, and the riveting punch is connected to a power mechanism, and the power mechanism drives the riveting punch to reciprocate up and down for riveting work; the first guiding arm and the second guiding arm make avoidance movements when the riveting punch performs riveting. This patented technology automatically feeds and rivets, with high riveting work efficiency, saving labor and production costs; and it also prevents hand injuries during the riveting process, making the production safer and suitable for industrial use.

[0006] However, in the practical process, similar automatic riveting devices for the backplane support feet all have a common problem: that is, the backplane, the support feet, and the hinge are pre-fed in place by their respective feeding mechanisms. In order to facilitate the hinge to extend between the backplane and the support feet, the gap between the backplane and the support feet will be widened to a little more than the height of a hinge. Therefore, there will be gaps between the three after they are in place. Then, when the power mechanism drives the riveting punch to perform the riveting work, either part of the hinge is pressed in place while part is not, or the gap between the support feet and the hinge is very large after riveting. Worse results will occur such as stress-induced hidden cracks or accidental fractures of the support feet. In short, various defective products will be formed, the product qualification rate is not high, the cost is increased, and the production efficiency is reduced. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above defects of the prior art and provide an automatic assembly device for the backplane support feet of a photo frame with high automation, good production flexibility, guaranteed assembly quality, improved assembly efficiency, and reduced production cost.

[0008] To achieve the above purpose, the present invention is realized through the following technical solutions: An automatic assembly device for the backplane support feet of a photo frame includes a workbench. A backplane feeding mechanism, a support foot feeding mechanism, a hinge feeding mechanism, a riveting pressing mechanism, and a riveting supporting mechanism are arranged on the workbench. It is characterized in that the riveting pressing mechanism includes a suspended frame. A pair of fourth slide rails arranged in parallel vertically are arranged on the suspended frame. A fourth slider is arranged on each of the fourth slide rails. A fourth slide plate is arranged on the two fourth sliders. A power mechanism for driving it to reciprocate up and down is arranged on one side surface of the fourth slide plate. A pressing head and a pre-tightening head that are misaligned in the front-back and up-down directions are arranged on the other side surface of the fourth slide plate. Among them, the pre-tightening head is located above and outside the pressing head. A riveting pre-in-place mechanism is arranged below the pre-tightening head. The riveting pre-in-place mechanism includes a pair of fifth slide rails arranged vertically. A fifth slider is slidably arranged in the gap between the two fifth slide rails. A return spring is respectively arranged between the fifth slider and each of the fifth slide rails. The fifth slider is in clutch connection with the pre-tightening head.

[0009] The present invention adds a riveting pre-in-place mechanism in front of the riveting pressing mechanism. After the backplane, the support feet, and the hinge are fed in place by their respective feeding mechanisms, they are pre-tightened first to eliminate the gap problem existing at the joint of the three, and then the three are pressed to achieve riveting, so that the assembly quality is guaranteed, the finished product qualification rate is improved, the assembly efficiency is also improved, and the production cost is effectively reduced. The whole set of feeding, docking, and riveting is automated and unattended, with high automation; the storage and feeding of the backplane and the support feet can be adaptively adjusted according to different size specifications, and the production flexibility is good.

[0010] The clamping head of the riveting clamping mechanism and the pre-tightening head of the riveting pre-positioning mechanism of the present invention use the same power system, which eliminates a power system and saves costs. The clamping head and the pre-tightening head need to work in a certain order, but it is not enough to just have a height difference, otherwise the pre-tightening head will achieve riveting, and there will be no need for the clamping head, and there will be no pre-tightening process. Therefore, the design of the present invention is very clever. After the pre-tightening head is pressed into place, it will no longer continue to press but maintain the pressing state, waiting for the clamping head to catch up to complete the riveting. Among them, after the fifth slider of the riveting pre-positioning mechanism is pushed into place by the pre-tightening head, the reset spring absorbs the energy that follows, so the pressing state is maintained.

[0011] Preferably, the pre-tightening head is provided with a screw hole which passes through from top to bottom, a first screw rod which is vertically penetrated is threadedly provided in the screw hole, a first nut is threadedly provided on the first screw rod, and the first screw rod is clutched with the fifth slider.

[0012] The simplest implementation method is that the fifth slider of the present invention is directly pushed down by the first screw of the pre-tightening head. As long as the specifications of the reset spring are reasonably selected, the reset spring can absorb the energy that follows, so that the fifth slider replaces the pre-tightening head to press the back plate, the support leg and the hinge into place, and then no longer continues to press but maintains the pressing state, waiting for the clamping head to catch up to complete the riveting.

[0013] Preferably, the preload head is provided with a downwardly extending ejector pin, the upper end of the fifth slider is fixedly connected with a driving rack, a driving gear is meshed on the side of the driving rack, a toggle block is eccentrically provided on the side of the driving gear, and the toggle block is clutched with the ejector pin.

[0014] The present invention adds a set of mechanisms on the fifth slider to transmit power optimally, that is, the eccentrically arranged toggle block on the driving gear plays a vital role. When the preload head is pressed down, it is subjected to force, but its walking trajectory is in a circle, rather than the straight line downward of the preload head. In this way, after it is pressed down for a certain distance, it is no longer subjected to the downward pressure of the preload head, but is blocked to one side by the preload head and cannot be reset, thus becoming a preload holding posture.

[0015] Preferably, the power mechanism includes a second motor and a reducer arranged on the cantilever frame, the motor shaft of the second motor is connected to the input shaft of the reducer, a drive turntable is arranged on the output shaft of the reducer, and an eccentric wheel is eccentrically arranged on the drive turntable; a horizontally arranged fourth slide groove is arranged on one side surface of the fourth slide plate, the fourth slide groove is arranged vertically to any fourth slide rail, and the eccentric wheel is slidably arranged in the fourth slide groove.

[0016] Adding a reducer to the second motor of the present invention can convert the high-speed and low-torque output of the motor into a low-speed and high-torque output, thereby achieving a better match between the second motor and the driven mechanism, reducing the impact load of the mechanical structure, allowing the second motor to better adapt to load requirements, and increasing the service life of the second motor.

[0017] The power transmission of the present invention is also quite unique, which is through the horizontal reciprocating motion of the eccentric wheel in the fourth slide slot, and the eccentric wheel rotates on the driving turntable, so when these two motions are superimposed, and the fourth slide rail and the fourth slide slot are vertically related, the fourth slide plate reciprocates vertically. This mechanism has smooth power output and can effectively protect the motor and reducer.

[0018] Preferably, the riveting support mechanism comprises a top column erected on the workbench, and a support block is arranged on the top of the top column.

[0019] The riveting clamping mechanism applies force downward to allow the hinge with rivets to penetrate into the back plate and the support foot to form a riveted structure. The back plate is suspended in the air on the back plate feeding mechanism. The present invention designs a top column and a support block just below the riveting pressure to share the riveting pressure, which can not only effectively protect the back plate and prevent the back plate from deformation and cracking, but also ensure that the riveting clamping mechanism presses down at a consistent distance each time, thereby realizing the riveted structure quickly and accurately.

[0020] Preferably, the back plate feeding mechanism comprises a pair of first supporting guide rails and second supporting guide rails arranged in parallel at intervals, a first circulating chain belt is arranged beside the first supporting guide rail, a first pushing block is arranged on the first circulating chain belt, a second circulating chain belt is arranged beside the second supporting guide rail, a second pushing block is arranged on the second circulating chain belt; a first driving sprocket and a first driven sprocket are respectively arranged at the head and tail ends of the first circulating chain belt, a second driving sprocket and a second driven sprocket are respectively arranged at the head and tail ends of the second circulating chain belt, a driving shaft which connects the first driving sprocket and the second driving sprocket in series and drives them synchronously passes through the first driving sprocket and the second driving sprocket, and the driving shaft is connected to a driving mechanism which drives it to operate; the driving mechanism comprises the following structure: a first motor, a driving pulley is arranged on the motor shaft of the first motor, the driving pulley is connected to a driven pulley through a transmission belt, and the driven pulley is arranged on one end of the driving shaft.

[0021] After the back plate falls into place, it is lifted between the first supporting guide rail and the second supporting guide rail, the first motor is started, and power is transmitted to the drive shaft through transmission mechanisms such as the driven pulley, the transmission belt and the driving pulley, and then the first driving sprocket, the second driving sprocket, the first driven sprocket and the second driven sprocket drive the first circulating chain belt and the second circulating chain belt to rotate synchronously in the same direction, and finally the first pushing block and the second pushing block push the back plate forward to between the riveting clamping mechanism and the riveting supporting mechanism, completing the back plate feeding work.

[0022] Preferably, the first supporting guide rail, the first endless chain belt, the first driving sprocket and the first driven sprocket are jointly mounted on a fixed bracket, and the fixed bracket is mounted on a workbench; the second supporting guide rail, the second endless chain belt, the second driving sprocket and the second driven sprocket are jointly mounted on a movable bracket, and a pair of first sliding blocks are respectively installed below the head and tail ends of the movable bracket in the length direction, and each pair of the first sliding blocks is respectively mounted on a first slide rail, and the two first slide rails are mounted on the workbench; the driving shaft is suspended on the workbench through a pair of support plates, and the two support plates exist independently of the movable bracket and the fixed bracket; a plurality of inlays with equal arc length spacing and extending along its axial direction are arranged on the outer surface of the driving shaft, and a plurality of inlay grooves with the same number as the inlays on the driving shaft and matching one by one are arranged on the inner walls of the first driving sprocket and the second driving sprocket.

[0023] The present invention takes into account the different sizes of back panels, and the original intention of the design of the present invention is to meet the feeding work of back panels of any size. Therefore, in order to match the different sizes of back panels, the second supporting guide rail and the second circulating chain belt are designed on the movable bracket, so that they can adjust the spacing relative to the first stripping guide rail and the first circulating chain belt, thereby meeting the needs of supporting photo frame back panels of different sizes.

[0024] In order to cooperate with the above design, in order to allow the second circulating chain to move, the second drive sprocket that drives it to rotate should also slide. The second drive sprocket must be able to slide axially on the drive shaft and realize radial transmission. Therefore, the second drive sprocket and the drive shaft can only be locked radially to prevent transmission slippage. Therefore, the embedded strips and embedded grooves are preferably designed to meet the above two actions. The purpose of designing the first drive sprocket in this way is to reduce parts of different specifications and reduce the difficulty of installation, and also to lay the groundwork for the subsequent sliding of the first drive sprocket.

[0025] Preferably, the support foot feeding mechanism includes a stacking rack. An unloading notch is provided on the side of the bottom of the stacking rack. A pushing plate is provided on the horizontal side of the unloading notch. A triangular groove sunken into its surface is provided on the pushing plate. The pushing plate is fixedly connected to a third slider. The third slider is slidably arranged on a third slide rail. The third slide rail is arranged on the stacking rack. A third air cylinder is arranged on the stacking rack. The cylinder shaft of the third air cylinder is connected to the third slider.

[0026] In order to feed the support feet stacked together one by one, the first problem to be solved is the peeling problem. Here, a triangular groove is very cleverly provided on the pushing plate to ensure that the height of this triangular groove is lower than or equal to the thickness of one support foot. Then when the lowermost support foot sinks into the pushing plate (the pushing plate is also the lower end seal of the stacking rack), with a lateral push of the pushing plate, one piece can be easily pushed out. And in order to prevent the upper support feet from being carried out by the frictional force, the height of the unloading notch provided on the front side of the pushing plate also only matches the thickness of one support foot. In this way, the upper support feet will not be carried out.

[0027] Preferably, the stacking rack includes a first crossbeam horizontally suspended on the workbench. A second slide rail horizontally lying on it is provided on the first crossbeam. A second slider capable of freely sliding on it is provided on the second slide rail. A slide rod seat is fixedly connected to the side of the second slider. A pair of vertically parallel slide rods are provided on the slide rod seat. A second nut is fixedly connected above the second slider. A second screw rod passes through the second nut. A slideway seat is jointly connected to the same-side ends of the first crossbeam and the second screw rod. A vertically arranged slideway is provided on the slideway seat. The slideway is parallel and confronts the two slide rods. A shrinkage groove rod extending along its length direction is provided in the groove of the slideway. The shrinkage groove rod is movably installed in the groove of the slideway through an adjusting bolt. A rotating wheel is fixedly connected to the free end of the second screw rod. The unloading notch is provided at the bottom of the slideway. The third air cylinder and the third slide rail are arranged on the slide rod seat.

[0028] In view of the different sizes of the support feet, and the original design intention of the present invention is to meet the feeding work of support feet of any size. Therefore, in order to match the different sizes of the support feet, considering that one end of the head of the support foot is a straight edge (connected to the back plate at the back for riveting the hinge side), and one end of the tail is a triangular edge, the triangular edge is restricted by a pair of parallel sliding rods, so that any size can be satisfied, which is just a matter of how much the triangle is pushed in. The straight edge is restricted by a slideway, and a groove shrinking rod needs to be installed in the channel to adjust the width to meet the width of the head of the support foot. After considering the sizes of the head and tail of the above support feet, the problem of different lengths needs to be solved. The length is achieved by adjusting the distance between the slideway and the sliding rod. More precisely, it is to adjust the distance between the slideway seat and the sliding rod seat. The slideway seat is fixed relative to the first lifting beam and rotates at a fixed point relative to the second screw rod. That is to say, a bearing seat is provided on the slideway seat for the second screw rod to be installed. Rotating the rotating wheel drives the second screw rod to rotate, and the second slider slides relative to the second slide rail, that is, slides relative to the first lifting beam, thereby driving the sliding rod seat to move relative to the slideway seat, and then changing the distance between the slideway and the sliding rod to meet the problem of storing and feeding materials for adjusting and adapting to support feet of different lengths.

[0029] Preferably, the hinge feeding mechanism includes a second lifting beam horizontally suspended above the workbench, a fourth slide rail horizontally lying on the second lifting beam, a fourth slider capable of freely sliding on the fourth slide rail, a pushing rod fixedly connected to the fourth slider, a strong magnet provided at the free end of the pushing rod, a fourth air cylinder provided on the second lifting beam, the air cylinder shaft of the fourth air cylinder being connected to the pushing rod, and a storage box provided at one end of the second lifting beam, the storage box being located directly below the pushing rod.

[0030] The storage box of the present invention is actually the terminal of a conveying track, and its starting end is a vibrating feeding tray. This kind of hinge storage and replenishment device is relatively common and is applied in various industries, such as the patent draft of the background technology, the vibrating feeding device for zipper heads, etc. The present invention will not be elaborated here. During the reciprocating movement of the pushing rod pushed by the fourth air cylinder, when passing through the storage box, it sucks away a hinge through the strong magnet and then sends it to between the riveting and pressing mechanism and the riveting and supporting mechanism.

[0031] Beneficial effects: The present invention adds a pre-riveting-in-place mechanism in front of the riveting and pressing mechanism. After the back plate, the support feet and the hinges are sent to the designated positions by their respective feeding mechanisms, they are pre-tightened first to eliminate the gap problems at the joints of the three, and then the three are pressed to achieve riveting, so that the assembly quality is guaranteed, the qualified rate of the finished products is improved, the assembly efficiency is also improved, and the production cost is effectively reduced. The whole set of feeding, docking and riveting is automated and unattended, with a high degree of automation; the storage and feeding of the back plate and the support feet can be adjusted adaptively according to different size specifications, and the production flexibility is good. Brief Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the riveting and supporting mechanism of the present invention; Figure 3 is a schematic structural diagram of the back panel feeding mechanism of the present invention; Figure 4 is a schematic structural diagram of the support leg feeding mechanism of the present invention; Figure 5 is a partial schematic structural diagram of the support leg feeding mechanism of the present invention; Figure 6 is a schematic structural diagram of the hinge feeding mechanism of the present invention; Figure 7 is a schematic structural diagram of the riveting and pressing mechanism of the present invention; Figure 8 is a partial schematic structural diagram of the riveting and pressing mechanism of the present invention; Figure 9 is a partial schematic structural diagram of one of the riveting and pressing mechanisms of the present invention; Figure 10 is a partial schematic structural diagram of another riveting and pressing mechanism of the present invention; Figure 11 is a schematic structural diagram of one of the riveting pre - in - place mechanisms of the present invention 。

[0033] Figure 12 is a schematic structural diagram of another riveting pre - in - place mechanism of the present invention 。

[0034] In the figure: 1-workbench, 2-back plate feeding mechanism, 3-supporting foot feeding mechanism, 4-hinge feeding mechanism, 5-riveting supporting mechanism, 6-riveting pressing mechanism, 7-back plate, 8-supporting foot, 9-driving mechanism, 10-top column, 11-supporting block, 12-first supporting guide rail, 13-second supporting guide rail, 14-first circulating chain belt, 15-second circulating chain belt, 16-first pushing block, 17-second pushing block, 1 8-first driving sprocket, 19-first driven sprocket, 20-second driving sprocket, 21-second driven sprocket, 22-driving shaft, 23-fixed bracket, 24-movable bracket, 25-first slider, 26-first slide rail, 27-support plate, 28-first cantilever beam, 29-second slide rail, 30-second slider, 31-slide rod seat, 32-slide rod, 33-second nut, 34-second screw rod, 35-slideway Seat, 36-slideway, 37-reduction groove rod, 38-adjusting bolt, 39-discharging notch, 40-push plate, 41-third slider, 42-third slide rail, 43-third cylinder, 44-triangular groove, 45-second beam, 46-fourth slide rail, 47-fourth slider, 48-push rod, 49-strong magnet, 50-fourth cylinder, 51-storage box, 52-lifting rack, 53-second motor, 54-deceleration Device, 55-fourth slide rail, 56-fourth slider, 57-fourth slide plate, 58-fourth slide groove, 59-clamping head, 60-pre-tightening head, 61-drive turntable, 62-eccentric wheel, 63-fifth slide rail, 64-fifth slider, 65-reset spring, 66-drive rack, 67-drive gear, 68-sliding block, 69-rotating wheel, 70-hinge, 71-first screw, 72-first nut, 73-thimble. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features and objectives of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0036] Example 1: Figure 1 As shown, an automatic assembly device for photo frame backboard legs comprises a workbench 1, on which are arranged a backboard feeding mechanism 2, a leg feeding mechanism 3, a hinge feeding mechanism 4, a riveting pressing mechanism 6 and a riveting supporting mechanism 5. The backboard 7 is on the backboard feeding mechanism 2, and the leg 8 is on the leg feeding mechanism 3.

[0037] like Figure 2 As shown, the riveting support mechanism 5 includes a top column 10 erected on a workbench, and a support block 11 is provided at the top of the top column 10. The support block 11 is located directly below the convergence point of the back panel feeding mechanism 2, the support leg feeding mechanism 3 and the hinge feeding mechanism 4.

[0038] like Figure 3As shown, the back plate feeding mechanism 2 includes a pair of first supporting guide rails 12 and second supporting guide rails 13 arranged in parallel at intervals, a first circulating chain belt 14 is arranged next to the first supporting guide rail 12, a first pushing block 16 is arranged on the first circulating chain belt 14, a second circulating chain belt 15 is arranged next to the second supporting guide rail 13, and a second pushing block 17 is arranged on the second circulating chain belt 15.

[0039] A first driving sprocket 18 and a first driven sprocket 19 are respectively provided at the head and tail ends of the first endless chain belt 14, and a second driving sprocket 20 and a second driven sprocket 21 are respectively provided at the head and tail ends of the second endless chain belt 15. A driving shaft 22 that connects the first driving sprocket 18 and the second driving sprocket 20 in series and drives them synchronously passes through them. Six strips that are distributed at equal arc length intervals and extend along the axial direction are provided on the outer surface of the driving shaft 22. Six embedded grooves that are the same number as the embedded strips on the driving shaft 22 and match one by one are provided on the inner walls of each of the first driving sprocket 18 and the second driving sprocket 20.

[0040] The driving shaft 22 is connected to a driving mechanism 9 that drives it to operate. The driving shaft 22 is suspended on the workbench 1 through a pair of support plates 27. The two support plates 27 exist independently of the movable bracket 24 and the fixed bracket 23.

[0041] The driving mechanism 9 includes the following structure: a first motor, a driving pulley is arranged on the motor shaft of the first motor, the driving pulley is connected to a driven pulley through a transmission belt, and the driven pulley is arranged on one end of the driving shaft 22.

[0042] The first supporting guide rail 13 , the first endless chain belt 15 , the first driving sprocket 20 and the first driven sprocket 21 are installed together on a fixed bracket 23 , and the fixed bracket 23 is installed on the workbench 1 .

[0043] The second material supporting guide rail 12, the second endless chain belt 14, the second driving sprocket 18 and the second driven sprocket 19 are installed together on a movable bracket 24, and a pair of first sliders 25 are installed below the head and tail ends of the movable bracket 24 in the length direction, and each pair of first sliders 25 are respectively installed on a first slide rail 26, and the two first slide rails 26 are installed on the workbench 1, and a stop bolt is connected between the movable bracket 24 and the workbench 1.

[0044] like Figure 4 and Figure 5As shown in the figure, the support leg feeding mechanism 3 includes a stacking rack. The stacking rack includes a first crossbeam 28 horizontally suspended above the workbench. A second slide rail 29 is horizontally laid on the first crossbeam 28. A second slider 30 capable of freely sliding thereon is arranged on the second slide rail 29. A slide rod seat 31 is fixedly connected to the side of the second slider 30. A pair of vertically parallel slide rods 32 are arranged on the slide rod seat 31. A second nut 33 is fixedly connected above the second slider 30. A second screw rod 34 passes through the second nut 33. A rotating wheel 69 is fixedly connected to the free end of the second screw rod 34.

[0045] A slideway seat 35 is jointly connected to the same-side ends of the first crossbeam 28 and the second screw rod 34. The slideway seat 35 is fixedly connected to the first crossbeam 28, and a bearing is arranged at the connecting part of the second screw rod 34 and the slideway seat 35. A vertically arranged slideway 36 is arranged on the slideway seat 35. The slideway 36 is parallel and confronts the two slide rods 32.

[0046] A groove-shrinking rod 37 extending along its length direction is arranged in the groove of the slideway 36. The groove-shrinking rod 37 is movably installed in the groove of the slideway through an adjusting bolt 38. If there is only one adjusting bolt 28, a pair of supporting slide columns need to be added to assist in supporting the groove-shrinking rod 37; if there are two or more adjusting bolts 38, the above-mentioned slide columns do not need to be added.

[0047] An outlet notch 39 is arranged at the bottom of the slideway 36. A pushing plate 40 is arranged on the horizontal side of the outlet notch 39. The pushing plate 40 is fixedly connected to a third slider 41. The third slider 41 is slidably arranged on a third slide rail 42. The third slide rail 42 is installed on the slide rod seat 41. A third air cylinder 43 is also arranged on the slide rod seat 41. The cylinder shaft of the third air cylinder 43 is connected to the third slider 42.

[0048] A triangular groove 44 sunken in its surface is arranged on the pushing plate 40. The triangular groove 44 just fits the triangle at the tail of the support leg 8. The depth of the triangular groove 44 is equal to the thickness of the support leg 8.

[0049] As Figure 6 shown in the figure, the hinge feeding mechanism 4 includes a second crossbeam 45 horizontally suspended above the workbench. A fourth slide rail 46 is horizontally laid on the second crossbeam 45. A fourth slider 47 capable of freely sliding thereon is arranged on the fourth slide rail 46. A pushing rod 48 is fixedly connected to the fourth slider 47. A strong magnet 49 is arranged at the free end of the pushing rod 48. A fourth air cylinder 50 is arranged on the second crossbeam 45. The cylinder shaft of the fourth air cylinder 50 is connected to the pushing rod 48. A storage box 51 is arranged at one end of the second crossbeam 45. The storage box 51 is located directly below the pushing rod 48.

[0050] AsFigure 7 , Figure 8 and Figure 9 As shown, the riveting and clamping mechanism 6 includes a suspended frame 52, on which a second motor 53 and a reducer 54 are arranged, the motor shaft of the second motor 53 is connected to the input shaft of the reducer 54, the output shaft of the reducer 54 is provided with a driving turntable 61, and an eccentric wheel 62 is eccentrically arranged on the driving turntable 61.

[0051] A pair of fourth slide rails 55 arranged in vertical parallel are also provided on the cantilever frame 52, a fourth slider 56 is provided on each fourth slide rail 55, a fourth slide plate 57 is provided on two fourth slide plates 56, a horizontally arranged fourth slide groove 58 is provided on one side of the fourth slide plate 57, the fourth slide groove 58 is arranged perpendicular to the two fourth slide rails 55, the eccentric wheel 62 is slidably set in the fourth slide groove 58, and a clamping head 59 and a pre-tightening head 60 which are staggered frontward, backward and upward are provided on the other side of the fourth slide plate 57, wherein the pre-tightening head 60 is located above the outer side of the clamping head 59.

[0052] like Figure 10 and 11 As shown, the preload head 60 is provided with a screw hole which passes through from top to bottom, in which a first screw rod 71 which passes through vertically is threadedly provided, and a first nut 72 is threadedly provided on the first screw rod 71 .

[0053] A riveting pre-positioning mechanism is arranged below the pre-tightening head 60, and the riveting pre-positioning mechanism includes a pair of vertically arranged fifth slide rails 63, a fifth slider 64 is slidably arranged in the gap between the two fifth slide rails 63, the fifth slider 64 is T-shaped, and a return spring 65 is respectively arranged between the fifth slider 64 and each fifth slide rail 63, and the first screw rod 71 is connected to the fifth slider 64 in a clutching manner.

[0054] The fifth slide rail 63 , the fifth slider 64 and the return spring 65 are all installed on the stacking frame of the leg-supporting feeding mechanism 3 , more specifically, on the slideway 36 .

[0055] Example 2: Figure 12 As shown, the upper end of the fifth slider 64 is fixedly connected to a driving rack 66, and a driving gear 67 is meshed on the side of the driving rack 66. A toggle block 68 is eccentrically arranged on the side of the driving gear 67. A downwardly extending ejector pin 73 is arranged on the preload head 60, and the ejector pin 73 is connected to the toggle block 68 in a clutch manner.

[0056] The above-mentioned toggle block 68, driving gear 67, driving rack 66, fifth slide rail 63, fifth slider 64 and return spring 65 are all installed on the stacking frame of the support feeding mechanism 3, more specifically on the slideway 36, wherein the driving rack 66 and the fifth slider 64 are integrated.

[0057] The rest is the same as in Example 1.

[0058] Embodiment 3: In order to make the mechanism run more stably, the stacking frame of the leg feeding mechanism 3 and the cantilever frame 52 of the riveting and clamping mechanism 6 are close to each other and can be connected and bound together, more specifically, the slide 36 and the cantilever frame 52 are locked together.

[0059] The rest is the same as in Example 1.

[0060] Use: In the back plate feeding mechanism, according to the specific size of the back plate 7, adjust the distance between the first support rail and the second support rail, unlock the movable bracket to make the movable bracket move, and after adjustment, lock the movable bracket so that the movable bracket cannot move. Then feed the material, the back plate is set between the first support rail and the second support rail, the first motor rotates the drive shaft through the transmission mechanism, and the drive shaft rotates the first and second circulating chain belts synchronously, so that the first push block and the second push block push the back plate to the center point of the assembly (that is, just above the support block of the riveted support mechanism, which is consistent with the following description).

[0061] In the support leg feeding mechanism, according to the specific size of the support leg 8 (the head end of the support leg is a straight edge, and the tail end is a triangular edge), the distance between the slideway and the slide bar is adjusted, and the second screw is driven to rotate forward or reverse by rotating the wheel, so that the second slider drives the slide bar seat to move forward and backward, and the triangular edge of the tail of the support leg is pushed into the two slide bars, and the straight edge of the head of the support leg is embedded in the slideway. Therefore, the width of the slideway groove must also be adjusted in advance, and it is achieved by adjusting the adjusting bolt to compress or open the groove width. The support legs are stacked in layers in an open stacking rack, and the bottom support leg is just supported by the push plate, and its tail is just embedded in the triangular groove of the push plate. Under the power of the third cylinder, the push plate pushes the bottom support leg out of the discharge gap (the side of the discharge gap is open, and the support leg only needs to be partially pushed forward to press the head, and after completion, it is drawn out through the side) and delivered to the assembly center point.

[0062] In the hinge feeding mechanism, the fourth cylinder reciprocates to push the push rod, and when it retracts, the strong magnet draws a hinge 70 from the storage box and then delivers it to the assembly center point.

[0063] The back plate 7, hinge 70 and support leg 8 are stacked in sequence, and the top column and support block of the riveting support mechanism are used to support them just below the riveting position and share the subsequent riveting pressure.

[0064] In the riveting clamping mechanism, pre-tightening is first performed to eliminate the gap problem existing at the joints of the back plate 7, the hinge 70 and the support leg 8. After the pre-tightening head is pressed into place, the pressing state is no longer continued but maintained, waiting for the clamping head to catch up to complete the riveting.

[0065] The detailed process is decomposed as follows: After the speed of the second motor is reduced and the torque is increased by the speed reducer, the driving turntable is driven to rotate. The driving disk makes the eccentric wheel perform eccentric motion on it, and the eccentric wheel reciprocates relative to the fourth sliding groove. The fourth sliding groove and the fourth sliding rail are arranged vertically, so the force transmitted by the eccentric wheel is changed in direction, causing the fourth slide plate to move up and down, thereby driving the pressing head and the pre-tightening head to reciprocate up and down.

[0066] In the solution of Embodiment 1, during the synchronous downward pressing of the pressing head and the pre-tightening head, the first screw of the pre-tightening head first presses down the fifth slider of the riveting pre-in-place mechanism. The fifth slider contacts the support leg, slowly presses the back plate 7, the hinge 70 and the support leg 8 and eliminates the gap among the three of them. However, it does not move downward without limit. After the fifth slider is pushed into place, when the pre-tightening head moves further downward, the return spring absorbs the subsequent energy, so the pressing state is maintained. Then the pressing head starts to contact the support leg, thus achieving a decisive riveting.

[0067] In Embodiment 2 of the alternative solution, during the synchronous downward pressing of the pressing head and the pre-tightening head, the ejector pin of the pre-tightening head contacts the toggle block of the riveting pre-in-place mechanism. The toggle block drives the driving gear to rotate, and then the driving rack moves downward, so that the fifth slider contacts the support leg, slowly presses the back plate 7, the hinge 70 and the support leg 8 and eliminates the gap among the three of them. However, it does not move downward without limit. After the fifth slider is pushed into place, when the ejector pin moves further downward, there is a clever structure here, that is, the walking track of the toggle block is circular, rather than the straight downward movement of the ejector pin. After the toggle block is pressed down a certain distance, it is no longer under the downward pressure of the ejector pin, but is blocked by the ejector pin and cannot be reset. The ejector pin cannot press the toggle block further downward, so it becomes a pre-pressing and maintaining state. When the pre-tightening head moves further downward, the pressing head starts to contact the support leg, thus achieving a decisive riveting.

Claims

1. An automatic assembling device for the support feet of a photo frame backboard, comprising a workbench, on which a backboard feeding mechanism, a support foot feeding mechanism, a hinge feeding mechanism, a riveting and pressing mechanism and a riveting and supporting mechanism are arranged, characterized in that, The riveting clamping mechanism comprises a cantilever frame, a pair of fourth slide rails arranged in parallel in the vertical direction are arranged on the cantilever frame, a fourth slider is arranged on each of the fourth slide rails, a fourth slide plate is arranged on two of the fourth slide plates, a power mechanism for driving the fourth slide plate to reciprocate up and down is arranged on one side surface of the fourth slide plate, and a clamping head and a pre-tightening head are arranged in a staggered manner front to back and up to down on the other side surface of the fourth slide plate, wherein the pre-tightening head is located above the outer side of the clamping head; A riveting pre-positioning mechanism is arranged below the pre-tightening head, and the riveting pre-positioning mechanism includes a pair of vertically arranged fifth slide rails, a fifth slider is slidably arranged in the gap between the two fifth slide rails, a return spring is respectively arranged between the fifth slider and each of the fifth slide rails, and the fifth slider is connected to the pre-tightening head in a clutch.

2. The automatic assembling device for the backrest support feet of a photo frame according to claim 1, wherein, The pre-tightening head is provided with a screw hole which passes through from top to bottom, a first screw rod which is vertically penetrated is provided in the screw hole by threaded cooperation, a first nut is provided on the first screw rod by threaded cooperation, and the first screw rod is clutched with the fifth sliding block.

3. The automatic assembly device for the backrest support feet of a photo frame according to claim 1, characterized in that, The preload head is provided with a downwardly extending ejector pin, the upper end of the fifth slider is fixedly connected with a driving rack, a driving gear is meshed on the side of the driving rack, a toggle block is eccentrically provided on the side of the driving gear, and the toggle block is clutched with the ejector pin.

4. An automatic assembly device for a photo frame backplane support leg according to claim 1 or 2 or 3, characterized in that, The power mechanism includes a second motor and a reducer arranged on the cantilever frame, the motor shaft of the second motor is connected to the input shaft of the reducer, a drive turntable is arranged on the output shaft of the reducer, and an eccentric wheel is eccentrically arranged on the drive turntable; a horizontally arranged fourth slide groove is arranged on one side surface of the fourth slide plate, the fourth slide groove is arranged vertically to any fourth slide rail, and the eccentric wheel is slidably arranged in the fourth slide groove.

5. The automatic assembling device for the backrest support feet of a photo frame according to claim 1, wherein, The riveting support mechanism comprises a top column installed upright on the workbench, and a supporting block is arranged on the top end of the top column.

6. The automatic assembling device for the backrest support feet of a photo frame according to claim 1, wherein, The back plate feeding mechanism comprises a pair of first supporting guide rails and second supporting guide rails arranged in parallel at intervals, a first circulating chain belt is arranged beside the first supporting guide rail, a first pushing block is arranged on the first circulating chain belt, a second circulating chain belt is arranged beside the second supporting guide rail, a second pushing block is arranged on the second circulating chain belt; A first driving sprocket and a first driven sprocket are respectively disposed at the head and tail ends of the first endless chain belt, and a second driving sprocket and a second driven sprocket are respectively disposed at the head and tail ends of the second endless chain belt, and a driving shaft that connects the first driving sprocket and the second driving sprocket in series and drives them synchronously runs through the first driving sprocket and the second driving sprocket, and the driving shaft is connected to a driving mechanism that drives the first driving sprocket and the second driving sprocket to operate synchronously; The driving mechanism includes the following structure: a first motor, a driving pulley is arranged on the motor shaft of the first motor, the driving pulley is connected to a driven pulley through a transmission belt, and the driven pulley is arranged on one end of the driving shaft.

7. An automatic assembling device for the support feet of a photo frame backboard, according to claim 6, characterized in that, The first material supporting guide rail, the first endless chain belt, the first driving sprocket and the first driven sprocket are installed together on a fixed bracket, and the fixed bracket is installed on the workbench; The second material supporting guide rail, the second endless chain belt, the second driving sprocket and the second driven sprocket are installed together on a movable bracket, a pair of first sliders are installed below the head and tail ends of the movable bracket in the length direction, each pair of the first sliders is installed on a first slide rail respectively, and the two first slide rails are installed on the workbench; The driving shaft is suspended on the workbench through a pair of support plates, and the two support plates exist independently of the movable bracket and the fixed bracket; The outer surface of the drive shaft is provided with a plurality of strips which are distributed at equal arc length intervals and extend along its axial direction, and the inner walls of the first drive sprocket and the second drive sprocket are respectively provided with a plurality of grooves which are the same in number as the strips on the drive shaft and match one by one.

8. An automatic assembling device for the backrest support feet of a photo frame according to claim 1, characterized in that, The support leg feeding mechanism comprises a stacking frame, a discharging notch is arranged at the bottom side of the stacking frame, a pushing plate is arranged at the horizontal side of the discharging notch, and a triangular groove is arranged on the pushing plate which is sunk in the surface thereof; The push plate is fixedly connected to a third slider, the third slider is slidably arranged on the third slide rail, the third slide rail is arranged on the stacking frame, a third cylinder is arranged on the stacking frame, and the cylinder shaft of the third cylinder is connected to the third slider.

9. An automatic assembling device for the support feet of a photo frame backboard, according to claim 8, wherein, The stacking frame comprises a first beam horizontally suspended on the workbench, a second slide rail horizontally lying thereon is arranged on the first beam, a second slide block capable of sliding freely thereon is arranged on the second slide rail, a slide bar seat is fixedly connected to the side of the second slide block, a pair of slide bars vertically arranged in parallel are arranged on the slide bar seat, a second nut is fixedly connected to the top of the second slide block, and a second screw rod runs through the second nut; The first cantilever beam and the second screw rod are connected to a slide seat on the same side end, and a vertically arranged slide is provided on the slide seat. The slide is parallel to and opposed to the two slide rods. A groove-shrinking rod extending along the length direction of the slide is provided in the groove of the slide, and the groove-shrinking rod is movably installed in the groove of the slide through an adjusting bolt; A rotating wheel is fixedly connected to the free end of the second screw rod, the discharging notch is arranged at the bottom of the slideway, and the third cylinder and the third slide rail are arranged on the slide rod seat.

10. The automatic assembling device for the support feet of a photo frame backboard according to claim 1, characterized in that, The hinge feeding mechanism includes a second cantilever beam horizontally suspended on the workbench, a fourth slide rail horizontally lying thereon is arranged on the second cantilever beam, a fourth slider capable of sliding freely thereon is arranged on the fourth slide rail, a push rod is fixedly connected to the fourth slider, a strong magnet is arranged on the free end of the push rod, a fourth cylinder is arranged on the second cantilever beam, the cylinder shaft of the fourth cylinder is connected to the push rod, a material storage box is arranged on one end of the second cantilever beam, and the material storage box is located directly below the push rod.

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