A dual-clamp alternating projection screen cutting machine

Abstract

This invention belongs to the technical field of projection screen cutting equipment. A dual-clamp alternating projection screen cutting machine includes: an equipment assembly; which includes a support frame for support, a screen roller cutting mechanism disposed on the left side of the support frame, and a screen clamping device disposed at the discharge port of the screen roller cutting mechanism. This invention features a first screen clamp that gradually descends as it moves towards the gripping point, thus creating an oblique gripping position. This facilitates the following operations: firstly, it enables continuous gripping without stopping the machine, resulting in high efficiency; secondly, the various actuators have a linkage characteristic; and thirdly, when operating at an angle, the grippers open to form a wide-range gripping state, which helps the grippers accurately hold the ends of the screen, thus improving the stability of the overall screen pulling and preventing edge folding and fabric detachment.

Description

Technical Field

[0001] This invention relates to the field of projection screen cutting equipment technology, specifically to a dual-clamp alternating projection screen cutting machine. Background Technology

[0002] A projection screen cutting machine is used to cut rolls of projection screen material. The main operation is as follows: First, the roll of screen is placed on the machine's roller rack. The end of the screen is pulled to the gripper position and clamped by the gripper. After the gripper pulls the projection screen a certain distance, the clamping device holds the roll of screen. The cutting mechanism cuts the pulled screen into a screen of suitable size. After pulling the screen a short distance again, the gripper opens to unload the screen.

[0003] The existing curtain cutting machines described above have the following problems during use:

[0004] The problem of low efficiency is that during the process of pulling the curtain, the equipment needs to wait for the curtain to unroll to reach the specified size before cutting. This means that only one gripper station pulls the curtain. Moreover, during the unloading process, before the next operation, the gripper needs to move from the curtain release position to the gripping position, which affects the overall efficiency. Within one cycle, the back-moving operation increases the overall time, thus affecting the overall cutting efficiency. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention proposes a dual-clamp alternating projection screen cutting machine.

[0006] The technical solution of this invention is implemented as follows:

[0007] A dual-clamp alternating projection screen cutting machine includes:

[0008] The equipment assembly includes a support frame for support, a curtain roller cutting mechanism disposed on the left side of the support frame, a curtain clamping device disposed at the outlet of the curtain roller cutting mechanism, and a curtain support plate fixed to the bottom of the inner cavity of the support frame, wherein a channel is reserved between the curtain support plate and the front and rear sides of the inner wall of the support frame.

[0009] A beam-type transmission mechanism; the number of beam-type transmission mechanisms is two, and the two beam-type transmission mechanisms are slidably disposed on the inner wall of the equipment support, and the beam-type transmission mechanisms can move up and down on the equipment support;

[0010] Power mechanism; the power mechanism is located at the bottom of the inner wall of the equipment support, and the power mechanism drives the beam transmission mechanism to reciprocate up and down;

[0011] Adjustment mechanism; The adjustment mechanism is disposed inside the drive shaft of the power mechanism and extends outward along the axial direction of the drive shaft. The adjustment mechanism is rotatably disposed at the end of the beam transmission mechanism. The adjustment mechanism enables the beam transmission mechanism to move up and down, and the adjustment mechanism is fixedly connected to the outside of the power mechanism and rotates with the power mechanism.

[0012] First curtain clamp and second curtain clamp; the bottom of the first curtain clamp is higher than the top of the second curtain clamp. The first curtain clamp and the second curtain clamp can reciprocate at the clamping point and the curtain release point under the transmission of the power mechanism. Under the action of the adjustment mechanism, the first curtain clamp and the second curtain clamp will be height adjusted when they reach the clamping point and when the curtain is released. Multiple grippers are provided on the left side of the first curtain clamp and the second curtain clamp.

[0013] Furthermore, the beam transmission mechanism includes two connecting plates, with chain limit frames provided on both the upper and lower sides of the connecting plates. A mounting frame is fixedly connected to the outer side of the chain limit frame. The mounting frame is U-shaped. Limit slides are provided on both the upper and lower sides of the chain limit frame. A lead screw shaft is provided at the end of the mounting frame. A lead screw sleeve is provided on the lead screw shaft. Guide teeth are provided on the outer surface of the lead screw sleeve. The adjustment mechanism drives the guide teeth to rotate. A slide bar is fixedly connected to the mounting frame. The slide bar is sleeved in the adjustment groove provided on the inner wall of the equipment support.

[0014] Furthermore, the power mechanism includes a forward and reverse reversing motor. The drive wheel at the output end of the forward and reverse reversing motor drives two auxiliary wheels to rotate via a transmission bar. The drive shaft is installed through the axle of the auxiliary wheels. Drive wheels are fixedly connected to both ends of the drive shaft. Reciprocating belts are installed on the two drive wheels on the same side. The reciprocating belts pass through two chain limit frames. Bearings are installed at the axle of the drive wheels. The inner cavity of the bearings communicates with the inner cavity of the drive shaft.

[0015] Furthermore, it also includes a connecting slide, which is fixedly connected to the surface of the reciprocating belt. The upper and lower connecting slides are respectively fixedly connected to connecting frames. The bottom end of the second curtain clamp is fixedly connected to the connecting slide through a straight connecting frame, and the bottom end of the first curtain clamp is fixedly connected to the bottom of the lower connecting slide through two L-shaped connecting frames.

[0016] Furthermore, the adjustment mechanism includes a bidirectional disc mechanism, a transmission shaft sleeve is provided at the shaft center of the bidirectional disc mechanism, an anti-deviation sleeve is provided inside the transmission shaft sleeve, a displacement rod is provided through the anti-deviation sleeve, a spiral groove is provided on the displacement rod, a small-diameter free-spinning rod is provided at the inner end of the displacement rod, an elastic mechanism is fixedly connected to the inner end of the free-spinning rod, a bushing is sleeved on the elastic mechanism, the inner wall of the anti-deviation sleeve is in contact with the surface of the displacement rod, and the spiral groove is adapted to the guide teeth.

[0017] Furthermore, the transmission shaft sleeve includes a pressure ball plate, the outer surface of the pressure ball plate is provided with guide balls, the transmission shaft sleeve is provided with an elastic groove, a movable plate is provided in the elastic groove, a plurality of springs are provided on the inner side of the movable plate, the pressure ball plate is fixedly connected to the movable plate, the guide balls slide on the inner wall of the spiral groove, and one end of the transmission shaft sleeve is sleeved in the bearing.

[0018] Furthermore, a linkage belt is provided between the two bidirectional disc mechanisms in the lateral direction. The linkage belt is provided with a first forward drive rack and a second forward drive rack for simultaneously driving the two bidirectional disc mechanisms to rotate in the forward direction, and a first reverse drive rack and a second reverse drive rack for simultaneously driving the two bidirectional disc mechanisms to rotate in the reverse direction. The linkage belt is fixedly connected to the outside of the reciprocating belt.

[0019] Furthermore, the bidirectional disc mechanism is sleeved in the middle of the transmission shaft sleeve, and the transmission shaft sleeve is disposed in the circular opening at one end of the connecting plate through a bearing sleeve. The bidirectional disc mechanism includes a first toothed disc seat and a second toothed disc seat. A fixing ring is provided at the axial center of both the first toothed disc seat and the second toothed disc seat. Reverse contact teeth and forward contact teeth are elastically provided on the outer side of the first toothed disc seat and the second toothed disc seat.

[0020] Furthermore, it includes a linkage tensioning mechanism, of which there are two, which are disposed between the two beam-type transmission mechanisms and in contact with the transmission bar.

[0021] Furthermore, the linkage tensioning mechanism includes an adjusting seat plate, a fixed wheel below the adjusting seat plate, two sliding cavities at the upper end of the adjusting seat plate, an adjusting wheel elastically disposed within the sliding cavities by an adjusting spring, a rotating sleeve at the outer end of the adjusting wheel, two fixing strips on both the front and rear sides of the adjusting seat plate, a limit rotating rod on the side of the two fixing strips near the adjusting seat plate, two pull ropes on the rotating sleeve, a tightening rope fixedly connected to the outer ends of the two pull ropes, a take-up wheel between the two fixing strips near the connecting plate, a toothed ring shaft at the outer end of the take-up wheel, and a U-shaped bracket fixedly connected to the bottom of the inner wall of the equipment bracket, a toothed plate on one side of the U-shaped bracket, the toothed plate meshing with the toothed ring shaft, and one end of the tightening rope wound around the take-up groove of the take-up wheel.

[0022] The present invention has the following beneficial effects:

[0023] 1. In the process of clamping the curtain, the present invention firstly enables the reciprocating belt to rotate during the operation of the power mechanism. Consequently, the connecting slides on the upper and lower surfaces of the reciprocating belt move in opposite directions. This allows the first and second curtain clamps to move towards each other. When the first curtain clamp reaches the gripping point, the adjusting mechanism, driven by the power, causes the entire beam transmission mechanism to gradually move downwards as the first curtain clamp reaches the gripping point. At this point, the height difference H1 of the first curtain clamp's descent is equal to the height difference H2 of the second curtain clamp's movement. Then, the grippers on the first curtain clamp hold the curtain at the gripping point. During this movement, the first curtain clamp gradually descends as it moves toward the gripping point, thus forming an oblique gripping position. This facilitates the following operations: first, it enables non-stop gripping with strong continuity, thereby improving efficiency; second, it allows for the linkage of various actuators; and third, when operating at an angle, the grippers open to form a wide-range gripping state, which helps the grippers accurately hold the ends of the curtain, thus improving the stability of the overall curtain pulling and preventing edge folding and fabric detachment.

[0024] 2. After the grippers on the first curtain clamp of the present invention grab the curtain, the power mechanism moves in the opposite direction. In this way, the grippers on the first curtain clamp move the curtain from left to right. When the curtain moves to the position for placing the curtain, the grippers on the first curtain clamp slowly open. At this time, after the first curtain clamp moves a certain distance, the curtain falls on the curtain support plate. After completing the above operation process, the first curtain clamp moves a certain distance to the right to achieve height adjustment. In this way, the first curtain clamp and the second curtain clamp simultaneously achieve the lifting operation under the action of the adjustment mechanism.

[0025] 3. The present invention enables the second curtain clamp to grasp the curtain after the first curtain clamp releases the curtain. In this way, the first curtain clamp and the second curtain clamp can alternately grasp the curtain. Compared with the existing curtain cutting machine, it can realize the overlapping and alternating operation of two cutting cycles, which can significantly improve efficiency and thus improve production efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the first and second curtain clamps of the present invention in operation;

[0028] Figure 3 This is a schematic diagram of the beam-type transmission mechanism, power mechanism, and linkage tensioning mechanism in this invention;

[0029] Figure 4 This is a schematic diagram of the linkage tensioning mechanism in this invention;

[0030] Figure 5 This is a partial schematic diagram of the linkage tensioning mechanism in this invention;

[0031] Figure 6 This is a schematic diagram of the displacement rod in this invention;

[0032] Figure 7 This is a cross-sectional view of the transmission shaft sleeve in this invention;

[0033] Figure 8 This is a schematic diagram of the spring in this invention;

[0034] Figure 9 This is a schematic diagram of the linkage belt in this invention;

[0035] Figure 10 This is a schematic diagram of the first forward drive rack, the second forward drive rack, the first reverse drive rack, and the second reverse drive rack in this invention;

[0036] Figure 11 This is a schematic diagram of the bidirectional disk mechanism in this invention;

[0037] Figure 12 This is a schematic diagram of the transmission wheel in this invention. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1 and Figure 2 As shown, a dual-clamp alternating projection screen cutting machine includes:

[0040] The equipment assembly includes a support frame 1 for support, a curtain roller cutting mechanism 2 located on the left side of the support frame 1, a curtain clamping device 3 located at the outlet of the curtain roller cutting mechanism 2, and a curtain support plate 4 fixed to the bottom of the inner cavity of the support frame 1. A channel is reserved between the curtain support plate 4 and the front and rear sides of the inner wall of the support frame 1. The reserved channel is used to provide a passage for the first curtain clamp 10 and the second curtain clamp 11 to move back and forth so that they do not interfere with each other.

[0041] Beam transmission mechanism 6; There are two beam transmission mechanisms 6, which are slidably mounted on the inner wall of the equipment support 1 and can move up and down on the equipment support 1.

[0042] Power mechanism 7; Power mechanism 7 is located at the bottom of the inner wall of equipment support 1, and power mechanism 7 drives beam transmission mechanism 6 to move up and down reciprocally;

[0043] Adjustment mechanism 9; Adjustment mechanism 9 is set inside the drive shaft 75 of the power mechanism 7 and extends outward along the axial direction of the drive shaft 75. Adjustment mechanism 9 is rotatably set at the end of the beam transmission mechanism 6. Adjustment mechanism 9 enables the beam transmission mechanism 6 to move up and down. Adjustment mechanism 9 is fixedly connected to the outside of the power mechanism 7 and rotates with the power mechanism 7.

[0044] First curtain clamp 10 and second curtain clamp 11; the bottom of the first curtain clamp 10 is higher than the top of the second curtain clamp 11. Under the transmission of the power mechanism 7, the first curtain clamp 10 and the second curtain clamp 11 can reciprocate at the clamping point and the curtain release point. Under the action of the adjustment mechanism 9, the first curtain clamp 10 and the second curtain clamp 11 will be height adjusted when they reach the clamping point and when the curtain is released. Multiple grippers 12 are provided on the left side of the first curtain clamp 10 and the second curtain clamp 11.

[0045] The overall mechanism in this scheme operates as follows: During the curtain clamping process, when the power mechanism 7 is running, it causes the reciprocating belt 77 to rotate. Consequently, the connecting slides 13 on the upper and lower surfaces of the reciprocating belt 77 move in opposite directions. This allows the first curtain clamp 10 and the second curtain clamp 11 to move in opposite directions. When the first curtain clamp 10 moves to the gripping point, the adjusting mechanism 9, driven by the power, causes the entire beam transmission mechanism 6 to gradually move downwards as the first curtain clamp 10 enters the gripping point. At this time, the height difference H1 between the first curtain clamp 10 and the second curtain clamp 11 decreases. The height difference H2 of the movement is equal, and the grippers 12 on the first curtain clamp 10 clamp the curtain at the gripping point. During this movement, the first curtain clamp 10 gradually descends as it moves towards the gripping point, thus forming an oblique gripping position. This facilitates the following operations: first, it enables non-stop gripping with strong continuity, thereby improving efficiency; second, it enables the linkage of each actuator; and third, when operating at an angle, the grippers 12 open to form a wide-range gripping state, which helps the grippers 12 to accurately grip the end of the curtain, thereby improving the stability of the overall curtain pulling and preventing edge folding and fabric detachment.

[0046] In the above operation, after the gripper 12 on the first curtain clamp 10 grabs the curtain, the power mechanism 7 moves in the opposite direction. In this way, the gripper 12 on the first curtain clamp 10 moves the curtain from left to right. When the curtain moves to the position where it is placed, the gripper 12 on the first curtain clamp 10 slowly opens. At this time, after the first curtain clamp 10 moves a distance, the curtain falls on the curtain support plate 4. After completing the above operation, the first curtain clamp 10 moves a distance to the right to achieve height adjustment. In this way, the first curtain clamp 10 and the second curtain clamp 11 simultaneously achieve the rising operation under the action of the adjustment mechanism 9.

[0047] In the above process, after the first curtain clamp 10 releases the curtain, the second curtain clamp 11 can perform the operation of gripping the curtain. In this way, the first curtain clamp 10 and the second curtain clamp 11 can perform the operation of gripping the curtain alternately. Compared with the existing curtain cutting machine, it can achieve two cutting cycles of overlapping and alternating operation, which can significantly improve efficiency and thus improve production efficiency.

[0048] Reference Figure 3 As shown, when the first curtain clamp 10 and the second curtain clamp 11 operate alternately:

[0049] The beam transmission mechanism 6 includes two connecting plates 61. Chain belt limit brackets 62 are provided on both the upper and lower sides of the connecting plate 61. An installation bracket 64 is fixedly connected to the outer side of the chain belt limit bracket 62. The shape of the installation bracket 64 is "U". Limit slideways 63 are provided on both the upper and lower sides of the chain belt limit bracket 62. A screw shaft 66 is provided at the end of the installation bracket 64. A screw sleeve is provided on the screw shaft 66. A guiding tooth pattern 67 is provided on the outer surface of the screw sleeve. The adjustment mechanism 9 drives the guiding tooth pattern 67 to rotate. A sliding seat bar 65 is fixedly connected to the installation bracket 64. The sliding seat bar 65 is sleeved in an adjustment groove provided on the inner wall of the equipment support 1.

[0050] The power mechanism 7 includes a forward and reverse motor 71. The driving wheel 72 at the output end of the forward and reverse motor 71 drives two auxiliary wheels 74 to rotate through a transmission strip 73. A transmission shaft 75 is penetrated through the center of the auxiliary wheel 74. Transmission wheels 76 are fixedly connected to both the front and rear ends of the transmission shaft 75. A reciprocating belt 77 is provided on two transmission wheels 76 on the same side. The reciprocating belt 77 passes through the two chain belt limit brackets 62. A bearing 761 is provided at the center of the transmission wheel 76. The inner cavity of the bearing 761 is communicated with the inner cavity of the transmission shaft 75.

[0051] When the forward and reverse motor 71 rotates in the first rotation direction, the first curtain clamp 10 can be moved from the cloth-releasing position to the grasping preparation position. That is to say, at the position where the height of the first curtain clamp 10 is about to change, the forward and reverse motor 71 can be controlled by a program set in the equipment assembly to achieve a stop operation. The purpose of this setting is to enable the cutting machine in the equipment assembly to cut the curtain and reserve the operation time for cutting the curtain on the first curtain clamp 11. Specifically, the driving wheel 72 on the forward and reverse motor 71 drives the transmission strip 73 to rotate, and then the two auxiliary wheels 74 drive the transmission shafts 75 on both sides to rotate. Then, the reciprocating belt 77 on the transmission wheels 76 rotates in the two chain belt limit brackets 62. In this way, the upper and lower connecting sliding seats 13 can move in opposite directions to realize the alternate operation of the two connecting sliding seats 13. During this process, the limit slideway 63 can limit the connecting sliding seats 13 to ensure the stable movement of the first curtain clamp 10 and the second curtain clamp 11 without shaking problems. When the first curtain clamp 10 completes grasping the curtain, at this time, the forward and reverse motor 71 rotates in the second rotation direction, and then the first curtain clamp 10 completes the operation of pulling the curtain. When it is pulled to the curtain cutting size, the forward and reverse motor 71 stops rotating to complete the cutting time of the curtain on the first curtain clamp 10. Moreover, during this process, the curtain clamping device 3 clamps the end of the curtain, and after cutting, the curtain clamping device 3 releases the cut curtain.

[0052] It also includes a connecting slide 13, which is fixedly connected to the surface of the reciprocating belt 77. Connecting frames 5 are fixedly connected to the upper and lower connecting slides 13 respectively. The bottom end of the second curtain clamp 11 is fixedly connected to the connecting slide 13 via a straight connecting frame 5, and the bottom end of the first curtain clamp 10 is fixedly connected to the bottom of the lower connecting slide 13 via two L-shaped connecting frames 5. The L-shaped connecting frames 5 and the straight connecting frames 5 are arranged such that the L-shaped connecting frames 5 move to the outer side, ensuring that when the second curtain clamp 11 reciprocates and intersects with the first curtain clamp 10, the first curtain clamp 10 passes over the second curtain clamp 11, thus preventing their trajectories from interfering with each other.

[0053] Reference Figure 6 , Figure 7 and Figure 8As shown, to ensure that the second curtain clamp 11 and the first curtain clamp 10 move to the preparatory position and achieve synchronous height adjustment, the adjustment mechanism 9 includes a two-way disc mechanism 91. A transmission shaft sleeve 97 is provided at the axis of the two-way disc mechanism 91. An anti-deviation sleeve 98 is provided inside the transmission shaft sleeve 97. A displacement rod 99 is provided through the anti-deviation sleeve 98. A spiral groove 910 is provided on the displacement rod 99. A small-diameter free-spinning rod 911 is provided at the inner end of the displacement rod 99. An elastic mechanism is fixedly connected to the inner end of the free-spinning rod 911. An elastic mechanism is sleeved on the elastic mechanism. The inner wall of the bushing 912 and the anti-deviation sleeve 98 contacts the surface of the displacement rod 99. The spiral groove 910 is adapted to the guide tooth pattern 67. The transmission bushing 97 includes a pressure plate 971, and a guide bead 972 is provided on the outer surface of the pressure plate 971. The transmission bushing 97 is provided with an elastic groove 973, and a movable plate 974 is provided in the elastic groove 973. Multiple springs 975 are provided on the inner side of the movable plate 974. The pressure plate 971 and the movable plate 974 are fixedly connected. The guide bead 972 slides on the inner wall of the spiral groove 910. The bearing 761 is fitted with a transmission rod. At one end of the drive shaft sleeve 97, through the aforementioned mechanism, when the drive wheel 76 and the linkage belt 92 on the reciprocating belt 77 rotate, the bidirectional disc mechanism 91 rotates, which in turn drives the drive shaft sleeve 97 to rotate. When the drive shaft sleeve 97 rotates, the guide bead 972 on the drive shaft sleeve 97 can move within the spiral groove 910 along the direction of the spiral groove 910. Thus, when the drive shaft sleeve 97 is in a fixed position, the guide bead 972 moves the displacement rod 99 outward, causing the displacement rod 99 to rotate. When rod 99 rotates out, the spiral groove 910 on displacement rod 99 engages with guide tooth 67, which drives the lead screw sleeve containing guide tooth 67 to rotate, thereby enabling the lead screw sleeve to drive the lead screw shaft 66 to move upward. In this way, the entire beam transmission mechanism 6 moves upward. When the beam transmission mechanism 6 moves to a fixed height, the transmission shaft sleeve 97 moves to the small diameter idle rod 911, so that the guide bead 972 is in a state of not contacting the small diameter idle rod 911, thus maintaining the beam transmission mechanism 6 at the moving height.

[0054] In the above-described state, specifically, the first curtain clamp 10 and the second curtain clamp 11 can move upward at an angle, so that the second curtain clamp 11 reaches the position of the gripping point, and can move at an angle from the prepared position to the gripping position.

[0055] A linkage belt 92 is provided between the two bidirectional disc mechanisms 91 in the transverse direction. The linkage belt 92 is provided with a first forward drive rack 93 and a second forward drive rack 96 for simultaneously driving the bidirectional disc mechanisms 91 on both sides to rotate in the forward direction, and a first reverse drive rack 94 and a second reverse drive rack 95 for simultaneously driving the bidirectional disc mechanisms 91 on both sides to rotate in the reverse direction. The linkage belt 92 is fixedly connected to the outside of the reciprocating belt 77. The bidirectional disc mechanism 91 is sleeved in the middle of the transmission shaft sleeve 97. The transmission shaft sleeve 97 is set in the round opening at one end of the connecting plate 61 through the bearing sleeve. The bidirectional disc mechanism 91 includes a first toothed disc seat 916 and a second toothed disc seat 914. A fixing ring 913 is provided at the axis of both the first toothed disc seat 916 and the second toothed disc seat 914. Reverse contact teeth 917 and forward contact teeth 915 are elastically provided on the outside of the first toothed disc seat 916 and the second toothed disc seat 914.

[0056] When performing specific position adjustment operations, such as Figure 9 , Figure 10 and Figure 11 As shown, taking the entire operation cycle of the first curtain clamp 10 as an example:

[0057] When the second curtain clamp 11 moves from the rightmost position after the curtain is placed to the left, the forward and reverse motor 71 rotates in the second rotation direction. That is, when the first forward drive rack 93 and the second forward drive rack 96 move towards each other to the positions of the two-way disc mechanisms 91 on both sides, the second curtain clamp 11 reaches the preparatory position. When the first forward drive rack 93 and the second forward drive rack 96 mesh with the two-way disc mechanisms 91 on both sides, and under the drive of the first forward drive rack 93 and the second forward drive rack 96, the forward contact teeth 915 on the second disc seat 914 drive the transmission shaft sleeve 97 to rotate. The guide bead 972 on the transmission shaft sleeve 97 can move within the spiral groove 910 along the direction set by the spiral groove 910. With the transmission shaft sleeve 97 in a fixed position, the guide bead 972 moves the displacement rod 99 outward, causing the displacement rod 99 to rotate. When the displacement rod 99 rotates outward, the spiral groove 910 on the displacement rod 99 engages with the guide tooth 67, thus driving the lead screw sleeve containing the guide tooth 67 to rotate. This allows the lead screw sleeve to drive the lead screw shaft 66 to move upward, causing the beam transmission mechanism 6 to move upward as a whole. The second curtain clamp 11 then slowly rises to the gripping position. Furthermore, because the positive contact teeth 915 are elastically set on the second gear plate seat 914, and the two positive contact teeth 915 have contact surfaces with the first positive drive rack 93 and the second positive drive rack 96 that allow the bidirectional disc mechanism 91 to rotate in the positive direction, the... When the second curtain clamp 11 grabs the curtain, and moves to the right at the adjusted height (i.e., during the rotation of the forward / reverse motor 71 in the first rotation direction), the forward contact teeth 915 retract when they contact the inclined surfaces of the first forward drive rack 93 and the second forward drive rack 96. This prevents the bidirectional disc mechanism 91 from rotating, thus ensuring the second curtain clamp 11 remains stable at the adjusted height while pulling the curtain, increasing its stability. During this operation, before the first forward drive rack 93 and the second forward drive rack 96 contact the forward contact teeth 915 on both sides, the first reverse drive rack 94 and the second reverse drive rack 96... The drive rack 95 first passes through the reverse contact tooth 917 on the first gear plate seat 916. When the inclined surfaces of the teeth on the first reverse drive rack 94 and the second reverse drive rack 95 contact the inclined surfaces of the reverse contact tooth 917, the reverse contact tooth 917 retracts. Thus, when the first reverse drive rack 94 and the second reverse drive rack 95 pass by, the transmission shaft sleeve 97, due to its damping effect, will not rotate. However, during the return process of the first reverse drive rack 94 and the second reverse drive rack 95, that is, after the first curtain clamp 10 releases the curtain, when the vertical surfaces of the first reverse drive rack 94 and the second reverse drive rack 95 contact the reverse contact tooth 917, they can drive the first gear plate seat 916 to rotate.Then, the first gear plate seat 916 drives the transmission shaft sleeve 97 to rotate in the opposite direction. Because the displacement rod 99 has a spiral groove 910 and a small-diameter freewheeling rod 911 at its inner end, with an elastic mechanism fixedly connected to the inner end of the freewheeling rod 911, and a sleeve 912 fitted onto the elastic mechanism, when the displacement rod 99 moves outward, the guide bead 972 disengages outward along the spiral groove 910 and rotates in the direction of the spiral groove 910, thus preventing the guide bead 972 from entering the spiral groove 910. When the transmission shaft sleeve 97 rotates in the opposite direction, the guide bead 972 on the displacement rod 99 rotates towards the spiral groove 910. Under the action of the elastic mechanism and the rotation of the transmission shaft sleeve 97, the displacement rod 99 can be retracted. When the first reverse drive rack 94 and the second reverse drive rack 95 completely disengage from the reverse contact teeth 917, the descent operation is completed. This cycle repeats repeatedly.

[0058] When the drive shaft 75 rotates, the bearing 761 on the drive wheel 76 can rotate with the drive shaft sleeve 97. Since one end of the drive shaft sleeve 97 and the bearing sleeve are set in the round opening at one end of the connecting plate 61, the bearing sleeve here has a damping effect. This allows the drive shaft sleeve 97 to be affected by the damping effect of the bearing sleeve when it is on the drive wheel 76, so that it can achieve operation without interfering with the operation, and the rotation of the drive wheel 76 does not drive the drive shaft sleeve 97 to rotate.

[0059] like Figure 4 and Figure 5 The linkage tensioning mechanism 8 shown has two components, which are positioned between the two beam-type transmission mechanisms 6 and contact the transmission bar 73. Each linkage tensioning mechanism 8 includes an adjusting base plate 87, with a fixed wheel 88 positioned below it. Two sliding cavities are located at the upper end of the adjusting base plate 87, and an adjusting wheel 810 is elastically positioned within each cavity via an adjusting spring 813. A rotating sleeve 812 is located at the outer end of each adjusting wheel 810. Two fixing plates 81 are located on both the front and rear sides of the adjusting base plate 87, close to the adjusting base. A limit rod 89 is provided on one side of plate 87. Two pull ropes 811 are provided on the rotating sleeve 812. The outer ends of the two pull ropes 811 are fixedly connected to a tightening rope 86. A take-up wheel 82 is provided between the two fixed strip plates 81 near the connecting plate 61. A toothed ring shaft 83 is provided at the outer end of the take-up wheel 82. It also includes a U-shaped bracket 84 fixedly connected to the bottom of the inner wall of the equipment bracket 1. A toothed plate 85 is provided on one side of the U-shaped bracket 84. The toothed plate 85 meshes with the toothed ring shaft 83. One end of the tightening rope 86 is wound around the take-up groove of the take-up wheel 82.

[0060] During the descent of the aforementioned beam transmission mechanism 6, the distance between the two auxiliary wheels 74 and the driving wheel 72 decreases as the beam transmission mechanism 6 descends, causing the transmission bar 73 to loosen. This prevents the transmission bar 73 from driving the two auxiliary wheels 74 to rotate. As the beam transmission mechanism 6 descends, the fixed plate 81 moves downward within the U-shaped bracket 84, causing the toothed plate 85 on the fixed plate 81 to drive the toothed ring shaft 83 to rotate. Consequently, the take-up wheel 82 rotates, and the tightening rope 86 wound around the take-up wheel 82 can drive the two pull ropes 811 fixed to it to move downward. The pull ropes 811 then cause the rotating sleeve 812 to move downward. Under the action of the rotating sleeve 812, the adjusting wheel 810 is displaced downward. The adjusting wheel 810 can then press down on the transmission bar 73, making the transmission bar 73 appear compressed, thus preventing the transmission bar 73 from loosening and affecting the drive. This further improves the overall stability.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-clamp alternating projection screen cutting machine, characterized in that, Comprising: An equipment assembly, which includes an equipment bracket (1) for support, a curtain roll cutting mechanism (2) arranged on the left side of the equipment bracket (1), a curtain clamping device (3) arranged at the discharge port of the curtain roll cutting mechanism (2), a curtain supporting plate (4) fixed at the bottom of the inner cavity of the equipment bracket (1), and a channel is reserved between the front and rear sides of the inner wall of the equipment bracket (1) and the curtain supporting plate (4); A beam type transmission mechanism (6); the number of the beam type transmission mechanisms (6) is two, and the two beam type transmission mechanisms (6) are slidably arranged on the inner wall of the equipment bracket (1), and the beam type transmission mechanism (6) can move up and down on the equipment bracket (1); A power mechanism (7), the power mechanism (7) is arranged at the bottom of the inner wall of the equipment bracket (1), and the power mechanism (7) drives the beam type transmission mechanism (6) to move up and down reciprocally; An adjustment mechanism (9), the adjustment mechanism (9) is arranged in the transmission shaft (75) of the power mechanism (7) and extends axially out of the transmission shaft (75) to the outside along the transmission shaft (75), the adjustment mechanism (9) is rotatably arranged at the end of the beam type transmission mechanism (6), the adjustment mechanism (9) can make the beam type transmission mechanism (6) move up and down, and the adjustment mechanism (9) is fixedly connected to the outside of the power mechanism (7) and rotates along with the power mechanism (7); A first curtain clamp (10) and a second curtain clamp (11); the bottom of the first curtain clamp (10) is higher than the top of the second curtain clamp (11), the first curtain clamp (10) and the second curtain clamp (11) can reciprocate at the clamping point and the cloth releasing point under the transmission of the power mechanism (7), under the action of the adjustment mechanism (9), the first curtain clamp (10) and the second curtain clamp (11) will perform height adjustment when reaching the clamping point and when putting down the curtain, and a plurality of clamping claws (12) are arranged on the left side of the first curtain clamp (10) and the second curtain clamp (11); The beam type transmission mechanism (6) includes two connecting plates (61), chain belt limiting frames (62) are arranged on both the upper and lower sides of the connecting plates (61), an installation frame (64) is fixedly connected to the outside of the chain belt limiting frames (62), the shape of the installation frame (64) is "U", limiting slideways (63) are arranged on both the upper and lower sides of the chain belt limiting frames (62), a screw rod shaft (66) is arranged at the end of the installation frame (64), a screw rod sleeve is arranged on the screw rod shaft (66), a guiding tooth pattern (67) is arranged on the outer surface of the screw rod sleeve, the adjustment mechanism (9) drives the guiding tooth pattern (67) to rotate, and a sliding seat bar (65) is fixedly connected to the installation frame (64), and the sliding seat bar (65) is sleeved in an adjustment groove arranged on the inner wall of the equipment bracket (1).

2. The dual-clamp alternating projection screen cutting machine according to claim 1, characterized in that: The power mechanism (7) includes a forward and reverse motor (71). The drive wheel (72) at the output end of the forward and reverse motor (71) drives two auxiliary wheels (74) to rotate via a transmission bar (73). The drive shaft (75) is installed through the center of the auxiliary wheel (74). Both ends of the drive shaft (75) are fixedly connected to drive wheels (76). A reciprocating belt (77) is installed on the two drive wheels (76) on the same side. The reciprocating belt (77) passes through two chain limit frames (62). A bearing (761) is installed at the center of the drive wheel (76). The inner cavity of the bearing (761) is connected to the inner cavity of the drive shaft (75).

3. The dual-clamp alternating projection screen cutting machine according to claim 2, characterized in that: It also includes a connecting slide (13), which is fixedly connected to the surface of the reciprocating belt (77). The upper and lower connecting slides (13) are respectively fixedly connected to connecting frames (5). The bottom end of the second curtain clamp (11) is fixedly connected to the connecting slide (13) through the straight connecting frame (5). The bottom end of the first curtain clamp (10) is fixedly connected to the bottom of the lower connecting slide (13) through the two L-shaped connecting frames (5).

4. The dual-clamp alternating projection screen cutting machine according to claim 3, characterized in that: The adjustment mechanism (9) includes a bidirectional disc mechanism (91), a transmission shaft sleeve (97) is provided at the shaft center of the bidirectional disc mechanism (91), an anti-deviation sleeve (98) is provided inside the transmission shaft sleeve (97), a displacement rod (99) is provided through the anti-deviation sleeve (98), a spiral groove (910) is provided on the displacement rod (99), a small diameter idle rod (911) is provided at the inner end of the displacement rod (99), an elastic mechanism is fixedly connected to the inner end of the idle rod (911), a bushing (912) is sleeved on the elastic mechanism, the inner wall of the anti-deviation sleeve (98) is in contact with the surface of the displacement rod (99), and the spiral groove (910) is adapted to the guide tooth pattern (67).

5. A dual-clamp alternating projection screen cutting machine according to claim 4, characterized in that: The transmission bushing (97) includes a pressure plate (971), a guide bead (972) is provided on the outer surface of the pressure plate (971), an elastic groove (973) is provided on the transmission bushing (97), a movable plate (974) is provided in the elastic groove (973), a plurality of springs (975) are provided on the inner side of the movable plate (974), the pressure plate (971) is fixedly connected to the movable plate (974), the guide bead (972) slides on the inner wall of the spiral groove (910), and one end of the transmission bushing (97) is sleeved inside the bearing (761).

6. A dual-clamp alternating projection screen cutting machine according to claim 5, characterized in that: A linkage belt (92) is provided between the two bidirectional disc mechanisms (91) in the lateral direction. The linkage belt (92) is provided with a first forward drive rack (93) and a second forward drive rack (96) for simultaneously driving the bidirectional disc mechanisms (91) on both sides to rotate in the forward direction, and a first reverse drive rack (94) and a second reverse drive rack (95) for simultaneously driving the bidirectional disc mechanisms (91) on both sides to rotate in the reverse direction. The linkage belt (92) is fixedly connected to the outside of the reciprocating belt (77).

7. A dual-clamp alternating projection screen cutting machine according to claim 6, characterized in that: The bidirectional disc mechanism (91) is sleeved in the middle of the transmission shaft sleeve (97). The transmission shaft sleeve (97) is set in the circular opening at one end of the connecting plate (61) through the bearing sleeve. The bidirectional disc mechanism (91) includes a first toothed disc seat (916) and a second toothed disc seat (914). A fixing ring (913) is provided at the axis of both the first toothed disc seat (916) and the second toothed disc seat (914). Reverse contact teeth (917) and forward contact teeth (915) are elastically provided on the outer side of the first toothed disc seat (916) and the second toothed disc seat (914).

8. A dual-clamp alternating projection screen cutting machine according to claim 7, characterized in that: It includes a linkage tensioning mechanism (8), there are two linkage tensioning mechanisms (8), the two linkage tensioning mechanisms (8) are arranged between the two beam transmission mechanisms (6) and are in contact with the transmission bar (73).

9. A dual-clamp alternating projection screen cutting machine according to claim 8, characterized in that: The linkage tensioning mechanism (8) includes an adjusting seat plate (87), a fixed wheel (88) is provided below the adjusting seat plate (87), two sliding cavities are provided at the upper end of the adjusting seat plate (87), an adjusting wheel (810) is elastically arranged in the sliding cavity by an adjusting spring (813), a rotating sleeve (812) is provided at the outer end of the adjusting wheel (810), two fixed strips (81) are provided on the front and rear sides of the adjusting seat plate (87), a limit rod (89) is provided on the side of the two fixed strips (81) near the adjusting seat plate (87), and a rotating sleeve (812) is provided on the rotating sleeve (812). The device includes two pull ropes (811), with a tightening rope (86) fixedly connected to the outer ends of the two pull ropes (811). A take-up wheel (82) is provided at one end of the two fixed strips (81) near the connecting plate (61). A toothed ring shaft (83) is provided at the outer end of the take-up wheel (82). The device also includes a U-shaped bracket (84) fixedly connected to the bottom of the inner wall of the device bracket (1). A toothed plate (85) is provided on one side of the U-shaped bracket (84). The toothed plate (85) meshes with the toothed ring shaft (83). One end of the tightening rope (86) is wound around the take-up groove of the take-up wheel (82).

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