A pneumatic pressing device for a carpet bonding machine

Abstract

This invention discloses a pneumatic pressing device for a carpet bonding machine. When it is necessary to adjust the pressing force on the carpet, the lifting cylinder and lifting seat first drive the lifting shaft of the pressure roller to rise into the lifting track. At the same time, the linkage mechanism drives the limiting mechanism to unlock the rotating disk. Then, by adjusting the angle of the rotating disk, the first embedding hole of the first compression spring with a suitable elastic coefficient is facing upward. Then, by resetting the lifting cylinder, the lifting shaft moves downward and embeds into the resting groove of the resting block, compressing the corresponding first compression spring downward by a certain distance and pressing it onto the carpet. At the same time, the linkage mechanism drives the limiting mechanism to restrict the rotation of the rotating disk. The length of compression of multiple first compression springs by the same pressure roller is the same. Because the elastic coefficients of the multiple first compression springs are different, the force exerted by the first compression springs on the pressure roller is different, thereby realizing the adjustment of the pressing force of the pressure roller on the carpet.

Description

Technical Field

[0001] This invention relates to the field of carpet processing technology, and in particular to a pneumatic pressing device for a carpet bonding machine. Background Technology

[0002] With economic and social development, carpets are increasingly being installed in many indoor environments, including shopping malls and homes. Carpets offer a rich variety of patterns and colors, allowing for the decoration of environments according to cultural tastes. The choice of a suitable carpet can reflect cultural refinement, lifestyle habits, and personal preferences, creating a comfortable and pleasant home space. Exquisite carpets can also reflect the homeowner's refined cultural taste and distinguished social status. To enhance the comfort and durability of carpets, most have a backing fabric laminated to the underside, improving slip resistance and increasing comfort.

[0003] Chinese patent application CN103302950A, published on September 18, 2013, discloses an "Automatic Press-bonding Machine for Carpet Production". After bonding with glue, the machine is pressed together by upper and lower pressure rollers to improve the bonding strength.

[0004] The required clamping force varies when pressing different types of carpets after bonding. In the aforementioned comparative patent, the clamping force on the carpet is adjusted by adjusting the distance between the upper and lower pressure rollers. However, in this method of adjusting the clamping force, the clamping force varies greatly due to the different thicknesses of different types of carpets, resulting in an inability to accurately adjust the clamping force. Summary of the Invention

[0005] The purpose of this invention is to provide a pneumatic pressing device for a carpet bonding machine, which has the function of conveniently adjusting the pressing force.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a pneumatic pressing device for a carpet bonding machine, comprising a frame, a support plate mounted on the frame and supported on the lower surface of the carpet during carpet transport, lifting tracks symmetrically arranged on both sides of the frame with a "U"-shaped cross-section, and lifting shafts with lifting ends mounted within the lifting tracks and pressing rollers onto the upper surface of the carpet. A connecting seat is provided between the lower end of the lifting track and the frame. A rotating disk with multiple embedded grooves on its circumference is rotatably connected within the connecting seat. A first compression spring is provided at the bottom of each embedded groove. A support block with a support groove for the lifting shaft is provided on the first compression spring. The initial total length of the multiple first compression springs is the same, and the elastic coefficients of the multiple first compression springs are different. After rotation, the slot can correspond to the lifting track so that the lifting shaft is embedded in the support slot of the support block and compresses the corresponding first compression spring; lifting cylinders are provided on both sides of the frame, and lifting seats corresponding to the lifting shaft are provided on the piston rod of the lifting cylinder. When it is necessary to embed the lifting shaft into other embedding slots, the lifting cylinder and the lifting seat also lift the lifting shaft upward into the lifting track; a limiting mechanism is provided between the connecting seat and the rotating disk to restrict or unlock the rotation of the rotating disk, and a linkage mechanism is provided between the lifting cylinder and the limiting mechanism. During the process of the lifting cylinder lifting the lifting shaft into the lifting track, the linkage mechanism drives the limiting mechanism to unlock the rotation of the rotating disk. During the process of the lifting cylinder resetting, the linkage mechanism drives the limiting mechanism to restrict the rotation of the rotating disk.

[0007] By adopting the above technical solution, when it is necessary to adjust the pressing force on the carpet, the lifting cylinder and lifting seat first drive the lifting shaft of the pressure roller to rise into the lifting track. At the same time, the linkage mechanism drives the limiting mechanism to unlock the rotating disk. Then, by adjusting the angle of the rotating disk, the first embedding hole of the first compression spring with a suitable elastic coefficient is facing upward. Then, by resetting the lifting cylinder, the lifting shaft moves downward and embeds itself in the resting groove of the resting block, and compresses the corresponding first compression spring downward by a certain distance, pressing it onto the carpet. At the same time, the linkage mechanism drives the limiting mechanism to restrict the rotation of the rotating disk. Since the same pressure roller will eventually overcome the elastic force of the first compression spring and press it onto the carpet, the length of compression of multiple first compression springs by the pressure roller is the same during use. Because the elastic coefficients of multiple first compression springs are different, the force of the first compression spring on the pressure roller is different, thereby realizing the adjustment of the pressing force of the pressure roller on the carpet.

[0008] A further feature of the present invention is that: parallel limiting holes are provided on both sides of each embedding slot on the periphery of the rotating disk; the limiting mechanism includes two limiting seats symmetrically slidably disposed on both sides of the rotating disk, a limiting shaft disposed on the limiting seat and used for insertion into the limiting hole, a guide shaft disposed on the limiting seat and passing through the connecting seat in a horizontal direction, and a second compression spring sleeved on the guide shaft and with both ends pressed against the connecting seat and the limiting seat; when one of the embedding slots of the rotating disk is vertically upward, the two embedding slots are respectively located on the left and right sides, and the guide shaft is inserted into the limiting holes on both sides of the corresponding embedding slot under the action of the second compression spring; the linkage mechanism is disposed between the two limiting seats and the lifting cylinder, and drives the two limiting seats to move closer or further apart during the movement of the lifting cylinder.

[0009] By adopting the above technical solution, when the limiting mechanism is in use, the limiting shafts of the two limiting seats can be embedded in the corresponding limiting holes to restrict the rotation of the rotating disk. When the limiting shafts and the limiting holes of the rotating disk are disengaged, the rotation of the rotating disk can be unlocked. At the same time, during the movement of the lifting cylinder, the two limiting seats are driven to move closer or further apart, thereby facilitating the restriction or unlocking of the rotation of the rotating disk.

[0010] A further configuration of the present invention is as follows: the connecting seat is provided with an oblong hole extending vertically below the rotating disk; the linkage mechanism includes a connecting sleeve disposed in the middle of the piston rod of the lifting cylinder, a connecting shaft threaded onto the connecting sleeve at one end after passing through the oblong hole, a first wedge block disposed at the other end of the connecting shaft, and two second wedge blocks disposed at the lower end of the limiting seat and abutting against the sides of the first wedge block. During the process of the piston rod of the lifting cylinder moving upward to lift the lifting shaft into the lifting track, the connecting shaft moves within the oblong hole, and the first wedge block drives the two second wedge blocks to move away from each other and overcome the elastic force of the second compression spring, so as to drive the limiting shaft to gradually separate from the limiting hole.

[0011] By adopting the above technical solution, during the process of the piston rod of the lifting cylinder moving upward to lift the lifting shaft into the lifting track, the connecting shaft moves within the oblong hole. The first wedge block drives the two second wedge blocks to move away from each other and overcomes the elastic force of the second compression spring, thereby driving the limiting shaft to gradually separate from the limiting hole, thus facilitating the rotation of the unlocking disc. At the same time, when the lifting cylinder resets, the elastic force of the second compression spring can drive the limiting shaft to re-embed in the limiting hole, thereby restricting the rotation of the disc.

[0012] A further configuration of the present invention is as follows: sliding grooves that do not penetrate to the periphery of the rotating disk are provided on both sides of the embedding groove; sliders that are slidably connected in the two sliding grooves are provided on both sides of the support block; a first embedding hole is provided on the lower surface of the support block; a second embedding hole is provided at the bottom of the embedding groove; both ends of the first compression spring are embedded in the first embedding hole and the second embedding hole; the slider is pressed against the end of the sliding groove; and the first compression spring is in a compression state.

[0013] By adopting the above technical solution, the greater the length of the first compression spring that is compressed, the greater the force exerted by the first compression spring on the pressure roller. However, the greater the length of the first compression spring that is compressed, the greater the length required for the embedding groove, which will lead to an excessively large volume of the rotating disk and an excessively large stroke range of the lifting cylinder and lifting seat driving the lifting shaft. At this time, by setting a sliding groove that extends through the periphery of the rotating disk, the first compression spring can be in a compressed state after the first compression spring and the support block are installed, thereby solving the problem of the excessively large volume of the rotating disk caused by the excessive length required for the embedding groove.

[0014] A further feature of the present invention is that the limiting hole is provided with a threaded hole communicating with the sliding groove, and an adjusting bolt is provided in the limiting hole, which is threadedly connected to the threaded hole and has one end pressed against the slider. The adjusting bolt does not affect the limiting shaft from being embedded in the limiting hole.

[0015] By adopting the above technical solution, if different weight pressure rollers are directly replaced to press the carpet during use, the sliding block can be driven to move towards the center of the rotating disk by adjusting the bolts (different lengths of adjusting bolts can be replaced according to actual needs), so that the supporting force on the pressure roller is eliminated. At the same time, if the slider is at one end of the sliding groove, the deformation of a certain corresponding first compression spring is small. The deformation of the first compression spring can be increased in advance by adjusting the bolts to improve the installation stability of the supporting block and the first compression spring.

[0016] A further configuration of the present invention is as follows: the support groove is provided on the top of the support block, the lifting shaft is provided with a bearing whose bottom is embedded in the support groove, the lifting shaft is provided with a limiting ring whose thickness gradually decreases in the direction away from the center line of the lifting shaft, and the lifting seat, after rising, cooperates with the limiting ring to lift the pressure roller upward.

[0017] By adopting the above technical solution, bearings are set to reduce the friction when the pressure roller rotates. This allows the carpet to be pressed during transmission while the friction between the carpet and the pressure roller drives the roller to rotate, so that the carpet can pass smoothly through the pressure roller during transmission. At the same time, the thickness of the limiting ring gradually decreases, and the opening between the lifting seat and the limiting ring is larger, which makes it easier for the lifting seat to be fastened on the limiting ring to lift the pressure roller upward.

[0018] A further provision of the present invention is that: two lifting rails are provided on one side of the frame, and pressure rollers are provided between the corresponding two lifting rails. The distance between the two pressure rollers is no more than 0.5 meters. A negative pressure suction mechanism for realizing negative pressure suction of lint on the carpet is provided in the area between the two pressure rollers of the frame. The negative pressure suction mechanism includes a dust collection hood, a negative pressure pipe connected to the top of the dust collection hood, a negative pressure vacuum cleaner connected to the negative pressure pipe, and a square brush layer provided at the bottom opening edge of the dust collection hood and in contact with the carpet.

[0019] By adopting the above technical solution, since carpet fabrics typically have a lot of lint, two pressure rollers are used during the carpet bonding process to achieve double pressing to improve the bonding strength. At the same time, when the two pressure rollers press the two sides of the carpet corresponding to the negative pressure suction mechanism area, the carpet can be prevented from being sucked up by the negative pressure. At this time, the negative pressure power of the vacuum cleaner can be increased to improve the negative pressure suction effect on the lint. In addition, the square brush layer can brush out the lint on the carpet on the one hand, and increase the sealing of the connection between the dust collection hood and the carpet on the other hand, thereby increasing the negative pressure.

[0020] A further feature of the present invention is that: the dust collection hood has openings at both its front and rear ends; auxiliary dust collection housings that are connected to the openings in their natural state are raised and lowered at both ends of the dust collection hood; multiple guide sleeves are provided at both ends of the dust collection hood; a vertical shaft passing through the guide sleeves in a vertical direction is provided on the auxiliary dust collection housing; a third compression spring is fitted on the vertical shaft and abuts against the top of the auxiliary dust collection housing and the guide sleeves; a limiting block is provided at the bottom of the end of the dust collection hood to limit the minimum height of the downward movement of the auxiliary dust collection housing; the lower opening of the auxiliary dust collection housing abuts against the periphery of the pressure roller; when the pressure roller moves upward under the action of the lifting cylinder, the pressure roller drives the auxiliary dust collection housing to move upward after overcoming the elastic force of the third compression spring.

[0021] By adopting the above technical solution, since lint will adhere to the surface of the pressure roller during use, the auxiliary dust removal housing can achieve negative pressure suction of the lint adsorbed on the surface of the pressure roller. At the same time, the pressure roller will be raised and lowered by the lifting cylinder. The auxiliary dust removal housing can also be adjusted up and down with the pressure roller through the setting of the guide sleeve, vertical shaft and third compression spring, so as to avoid interference. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of Example 1;

[0024] Figure 2 This is a partial structural schematic diagram of Example 1;

[0025] Figure 3 yes Figure 2 A schematic diagram of a local structure based on the basic structure;

[0026] Figure 4 yes Figure 3 A partial structural cross-sectional view of the connection between the rotating disk and the support block;

[0027] Figure 5 This is a structural schematic diagram of Example 2;

[0028] Figure 6 This is a partial structural schematic diagram of Example 2.

[0029] In the diagram: 1. Frame; 2. Support plate; 3. Lifting rail; 4. Pressure roller; 41. Lifting shaft; 42. Bearing; 43. Limiting ring; 5. Connecting seat; 51. Waist-shaped hole; 6. Rotating disk; 61. Embedded groove; 62. Limiting hole; 63. Sliding groove; 64. Threaded hole; 65. Second embedded hole; 66. Adjusting bolt; 7. First compression spring; 8. Support block; 81. Support groove; 82. Sliding block; 83. First embedded hole; 9. Lifting cylinder; 91. Lifting seat; 101. Limiting seat; 1 02. Limiting shaft; 103. Guide shaft; 104. Second compression spring; 11. Linkage mechanism; 111. Connecting sleeve; 112. Connecting shaft; 113. First wedge block; 114. Second wedge block; 12. Negative pressure suction mechanism; 121. Dust collection hood; 1211. Opening; 122. Negative pressure pipe; 123. Negative pressure vacuum cleaner; 124. Square brush layer; 125. Auxiliary dust removal housing; 126. Guide sleeve; 127. Vertical shaft; 128. Third compression spring; 129. Limiting block. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1: A pneumatic pressing device for a carpet bonding machine, such as Figure 1 and Figure 2As shown, it includes a frame 1, a support plate 2 mounted on the frame 1 and supported on the underside of the carpet during carpet transport, lifting tracks 3 symmetrically arranged on both sides of the frame 1 with a cross-section of "U", and lifting shafts 41 with lifting ends mounted in the lifting tracks 3 and pressing rollers 4 that press against the upper surface of the carpet.

[0032] like Figures 1 to 3 As shown, a connecting seat 5 is provided between the lower end of the lifting track 3 and the frame 1. A rotating disk 6 with multiple embedding slots 61 on its periphery is rotatably connected inside the connecting seat 5. A first compression spring 7 is provided at the bottom of the embedding slot 61. A support block 8 with a support slot 81 for the lifting shaft 41 is provided on the first compression spring 7. The initial total length of the multiple first compression springs 7 is the same. The different thicknesses of the multiple first compression springs 7 result in different elastic coefficients. After rotation, the embedding slot 61 can correspond to the lifting track 3 so that the lifting shaft 41 is embedded in the support slot 81 of the support block 8 and compresses the corresponding first compression spring 7.

[0033] like Figures 1 to 3 As shown, a support groove 81 is located on top of the support block 8, and a bearing 42 with its bottom embedded in the support groove 81 is provided on the lifting shaft 41. Lifting cylinders 9 are provided on both sides of the frame 1, and lifting seats 91 corresponding to the lifting shaft 41 are provided on the piston rods of the lifting cylinders 9. When it is necessary to embed the lifting shaft 41 into other embedding grooves 61, the lifting cylinders 9 and lifting seats 91 also lift the lifting shaft 41 upwards into the lifting track 3. A limiting ring 43 with a thickness gradually decreasing in the direction away from the center line of the lifting shaft 41 is provided on the lifting shaft 41. After the lifting seat 91 rises, it cooperates with the limiting ring 43 to lift the pressure roller 4 upwards.

[0034] like Figure 2 and Figure 3As shown, a limiting mechanism is provided between the connecting seat 5 and the rotating disk 6 to restrict or unlock the rotation of the rotating disk 6. A linkage mechanism 11 is provided between the lifting cylinder 9 and the limiting mechanism. During the process of the lifting cylinder 9 lifting the lifting shaft 41 into the lifting track 3, the linkage mechanism 11 drives the limiting mechanism to unlock the rotation of the rotating disk 6. During the process of the lifting cylinder 9 resetting, the linkage mechanism 11 drives the limiting mechanism to restrict the rotation of the rotating disk 6. Parallel limiting holes 62 are provided on both sides of each embedding slot 61 around the rotating disk 6. The limiting mechanism includes two limiting seats 101 symmetrically slidably disposed on both sides of the rotating disk 6, a limiting shaft 102 disposed on the limiting seat 101 and used for insertion into the limiting hole 62, a guide shaft 103 disposed on the limiting seat 101 and passing through the connecting seat 5 in a horizontal direction, and a second compression spring 104 sleeved on the guide shaft 103 and with both ends pressed against the connecting seat 5 and the limiting seat 101. When one of the embedding slots 61 of the rotating disk 6 is vertically upward, the other two embedding slots 61 are respectively on the left and right sides, and the guide shaft 103 is inserted into the limiting hole 62 on both sides of the corresponding embedding slot 61 under the action of the second compression spring 104. The linkage mechanism 11 is disposed between the two limiting seats 101 and the lifting cylinder 9, and drives the two limiting seats 101 to move closer or further apart during the movement of the lifting cylinder 9. The connecting seat 5 is located below the rotating disk 6 and has a waist-shaped hole 51 extending vertically. The linkage mechanism 11 includes a connecting sleeve 111 located in the middle of the piston rod of the lifting cylinder 9, a connecting shaft 112 that passes through the waist-shaped hole 51 and is threaded to the connecting sleeve 111 at one end, a first wedge block 113 located at the other end of the connecting shaft 112, and two second wedge blocks 114 located at the lower end of the limiting seat 101 and abutting against the sides of the first wedge block 113. During the process of the piston rod of the lifting cylinder 9 moving upward and driving the lifting shaft 41 to be lifted into the lifting track 3, the connecting shaft 112 moves in the waist-shaped hole 51. The first wedge block 113 drives the two second wedge blocks 114 to move away from each other and overcome the elastic force of the second compression spring 104, so as to drive the limiting shaft 102 to gradually separate from the limiting hole 62.

[0035] like Figure 3 and Figure 4 As shown, sliding grooves 63 that do not penetrate to the periphery of the rotating disk 6 are provided on both sides of the embedding groove 61. Slider blocks 82 slidably connected to the two sliding grooves 63 are provided on both sides of the support block 8. A first embedding hole 83 is provided on the lower surface of the support block 8, and a second embedding hole 65 is provided at the bottom of the embedding groove 61. The two ends of the first compression spring 7 are embedded in the first embedding hole 83 and the second embedding hole 65. The slider 82 is pressed against the end of the sliding groove 63, and the first compression spring 7 is in a compressed state. A threaded hole 64 communicating with the sliding groove 63 is provided on the limiting hole 62. An adjusting bolt 66 threadedly connected to the threaded hole 64 and with one end pressed against the slider 82 is provided in the limiting hole 62. The adjusting bolt 66 does not affect the embedding of the limiting shaft 102 into the limiting hole 62.

[0036] Implementation effect: When it is necessary to adjust the pressing force on the carpet, the lifting cylinder 9 and lifting seat 91 first drive the lifting shaft 41 of the pressure roller 4 to rise into the lifting track 3. At the same time, the linkage mechanism 11 drives the limiting mechanism to unlock the rotating disk 6 to rotate. Then, by adjusting the angle of the rotating disk 6, the first embedding hole 83 where the first compression spring 7 with a suitable elastic coefficient is located is facing upward. Then, by resetting the lifting cylinder 9, the lifting shaft 41 moves downward and embeds into the resting groove 81 of the resting block 8, and compresses the corresponding first compression spring 7 downward by a certain distance to press it onto the carpet. At the same time, the linkage mechanism 11 drives the limiting mechanism to restrict the rotation of the rotating disk 6. Since the same pressure roller 4 will eventually overcome the elastic force of the first compression spring 7 to press it onto the carpet, during use, the length of compression of multiple first compression springs 7 by the pressure roller 4 is the same. Because the elastic coefficients of multiple first compression springs 7 are different, the force of the first compression spring 7 on the pressure roller 4 is different, thereby realizing the adjustment of the pressing force of the pressure roller 4 on the carpet.

[0037] When the limiting mechanism is in use, the limiting shafts 102 of the two limiting seats 101 are embedded in the corresponding limiting holes 62 to limit the rotation of the rotating disk 6. When the limiting shafts 102 and the limiting holes 62 of the rotating disk 6 are disengaged, the rotation of the rotating disk 6 can be unlocked. At the same time, during the movement of the lifting cylinder 9, the two limiting seats 101 are driven to move closer or further away from each other, thereby facilitating the restriction or unlocking of the rotation of the rotating disk 6. During the upward movement of the piston rod of the lifting cylinder 9, which drives the lifting shaft 41 to be lifted into the lifting track 3, the connecting shaft 112 moves within the oblong hole 51. The first wedge block 113 drives the two second wedge blocks 114 to move away from each other and overcome the elastic force of the second compression spring 104, thereby driving the limiting shaft 102 to gradually separate from the limiting hole 62, thus facilitating the rotation of the unlocking rotating disk 6. At the same time, when the lifting cylinder 9 is reset, the elastic force of the second compression spring 104 can drive the limiting shaft 102 to be re-embedded in the limiting hole 62, thereby restricting the rotation of the rotating disk 6.

[0038] The greater the length of the first compression spring 7 that is compressed, the greater the force exerted by the first compression spring 7 on the pressure roller 4. However, the greater the length of the first compression spring 7 that is compressed, the greater the length required for the embedded groove 61, which will result in an excessively large volume of the rotating disk 6 and an excessively large stroke range for the lifting cylinder 9 and the lifting seat 91 to drive the lifting shaft 41 to move up and down. At this time, by setting a sliding groove 63 that extends through the periphery of the rotating disk 6, the first compression spring 7 can be in a compressed state after the first compression spring 7 and the support block 8 are installed, thereby solving the problem of the excessive length required for the embedded groove 61 leading to an excessively large volume of the rotating disk 6. When using the carpet, if different weight pressure rollers 4 are directly replaced to press the carpet, the sliding block 8 can be moved towards the center of the rotating disk 6 by adjusting the bolt 66 (different lengths of adjusting bolt 66 can be replaced according to actual needs), so that the lifting shaft 41 of the pressure roller 4 is separated from the support force on the pressure roller 4. At the same time, if the slider 82 is at one end of the sliding groove 63, the deformation of a corresponding first compression spring 7 is small. The deformation of the first compression spring 7 can be increased in advance by adjusting the bolt 66 to improve the installation stability of the sliding block 8 and the first compression spring 7.

[0039] Example 2: A pneumatic pressing device for a carpet bonding machine, such as Figure 5 and Figure 6 As shown, the difference from Embodiment 1 is that: two lifting rails 3 are provided on one side of the frame 1, and pressure rollers 4 are provided between the two corresponding lifting rails 3. The distance between the two pressure rollers 4 is no more than 0.5 meters. A negative pressure suction mechanism 12 for vacuuming lint from the carpet is provided in the area between the two pressure rollers 4 of the frame 1. The negative pressure suction mechanism 12 includes a dust collection hood 121, a negative pressure pipe 122 connected to the top of the dust collection hood 121, a negative pressure vacuum cleaner 123 connected to the negative pressure pipe 122, and a square brush layer 124 set at the edge of the bottom opening 1211 of the dust collection hood 121 and abutting against the carpet.

[0040] like Figure 5 and Figure 6As shown, the dust collection hood 121 has openings 1211 at both the front and rear ends. The dust collection hood 121 has auxiliary dust removal housings 125 that are connected to the openings 1211 in a natural state. Multiple guide sleeves 126 are provided at both ends of the dust collection hood 121. A vertical shaft 127 is provided on the auxiliary dust removal housing 125 and passes through the guide sleeves 126 in a vertical direction. A third compression spring 128 is fitted on the vertical shaft 127 and abuts against the top of the auxiliary dust removal housing 125 and the guide sleeves 126. A limiting block 129 is provided at the bottom of the end of the dust collection hood 121 to limit the minimum height of the downward movement of the auxiliary dust removal housing 125. The lower opening 1211 of the auxiliary dust removal housing 125 abuts against the periphery of the pressure roller 4. When the pressure roller 4 moves upward under the action of the lifting cylinder 9, the pressure roller 4 drives the auxiliary dust removal housing 125 to move upward after overcoming the elastic force of the third compression spring 128.

[0041] Implementation Effect: Carpet fabrics typically have a lot of lint. During carpet bonding, two pressure rollers 4 achieve double pressing to improve the bonding strength. Simultaneously, when the two pressure rollers 4 press against the sides of the carpet corresponding to the negative pressure suction mechanism 12 area, they prevent the carpet from being sucked up by the negative pressure. At this time, the negative pressure power of the negative pressure vacuum cleaner 123 can be increased to improve the negative pressure suction effect on the lint. Furthermore, the square brush layer 124 not only brushes out the lint from the carpet but also increases the sealing at the connection between the dust collection cover 121 and the carpet, thus improving the negative pressure. Because lint adheres to the surface of the pressure rollers 4 during use, the auxiliary dust removal housing 125 achieves negative pressure suction of the lint adsorbed on the surface of the pressure rollers 4. Simultaneously, the pressure rollers 4 are raised and lowered by the lifting cylinder 9. The auxiliary dust removal housing 125, through the guide sleeve 126, guide shaft 103, and third compression spring 128, can also be adjusted in height along with the pressure rollers 4, avoiding interference.

Claims

1. A pneumatic pressing device for a carpet bonding machine, comprising a frame (1), a support plate (2) mounted on the frame (1) and supported on the underside of the carpet during carpet transport, lifting rails (3) symmetrically arranged on both sides of the frame (1) with a cross-section of "U", and pressure rollers (4) having lifting shafts (41) at both ends mounted within the lifting rails (3) and pressing them onto the upper surface of the carpet, characterized in that: A connecting seat (5) is provided between the lower end of the lifting track (3) and the frame (1). A rotating disk (6) with multiple embedding slots (61) on its periphery is rotatably connected in the connecting seat (5). A first compression spring (7) is provided at the bottom of the embedding slot (61). A support block (8) with a support slot (81) for the lifting shaft (41) is provided on the first compression spring (7). The initial total length of the multiple first compression springs (7) is the same, and the elastic coefficients of the multiple first compression springs (7) are different. After rotation, the embedding slot (61) can correspond to the lifting track (3) so that the lifting shaft (41) is embedded in the support slot (81) of the support block (8) and compresses the corresponding first compression spring (7). Lifting cylinders (9) are provided on both sides of the frame (1). The piston rod of the lifting cylinder (9) is provided with a lifting seat (91) corresponding to the lifting shaft (41). When the lifting shaft (41) needs to be embedded in other embedding slots (61), the lifting cylinder (9) and the lifting seat (91) also lift the lifting shaft (41) upward into the lifting track (3). A limiting mechanism is provided between the connecting seat (5) and the rotating disk (6) to restrict or unlock the rotation of the rotating disk (6). A linkage mechanism (11) is provided between the lifting cylinder (9) and the limiting mechanism. During the process of the lifting cylinder (9) lifting the lifting shaft (41) into the lifting track (3), the linkage mechanism (11) drives the limiting mechanism to unlock the rotation of the rotating disk (6). During the process of the lifting cylinder (9) resetting, the linkage mechanism (11) drives the limiting mechanism to restrict the rotation of the rotating disk (6).

2. The pneumatic pressing device for a carpet bonding machine according to claim 1, characterized in that: The rotating disk (6) has parallel limiting holes (62) on both sides of each embedding groove (61) around its periphery. The limiting mechanism includes two limiting seats (101) symmetrically slidably disposed on both sides of the rotating disk (6), a limiting shaft (102) disposed on the limiting seat (101) and used to be inserted into the limiting hole (62), a guide shaft (103) disposed on the limiting seat (101) and passing through the connecting seat (5) in a horizontal direction, and a sleeve on the guide shaft (103) with both ends abutting against the connecting seat (5) and the limiting seat (101). The second compression spring (104) between the rotating disk (6) is vertically upward when one of the embedded slots (61) is vertically upward. The two embedded slots (61) are respectively located on the left and right sides, and the guide shaft (103) is inserted into the limiting holes (62) on both sides of the corresponding embedded slot (61) under the action of the second compression spring (104). The linkage mechanism (11) is set between the two limiting seats (101) and the lifting cylinder (9) and drives the two limiting seats (101) to move closer to each other or further away from each other during the movement of the lifting cylinder (9).

3. The pneumatic pressing device for a carpet bonding machine according to claim 2, characterized in that: The connecting seat (5) is located below the rotating disk (6) and has a waist-shaped hole (51) extending vertically. The linkage mechanism (11) includes a connecting sleeve (111) located in the middle of the piston rod of the lifting cylinder (9), a connecting shaft (112) that passes through the waist-shaped hole (51) and is threaded to the connecting sleeve (111) at one end, a first wedge block (113) located at the other end of the connecting shaft (112), and two blocks located at the lower end of the limiting seat (101) and connected to the first wedge block. During the process of the piston rod of the lifting cylinder (9) moving upward to lift the lifting shaft (41) into the lifting track (3), the connecting shaft (112) moves in the waist-shaped hole (51). The first wedge block (113) drives the two second wedge blocks (114) to move away from each other and overcome the elastic force of the second compression spring (104) so ​​as to drive the limiting shaft (102) and the limiting hole (62) to gradually separate.

4. The pneumatic pressing device for a carpet bonding machine according to claim 3, characterized in that: The two sides of the embedding groove (61) are provided with sliding grooves (63) that do not penetrate to the periphery of the rotating disk (6). The two sides of the support block (8) are provided with sliders (82) that are slidably connected in the two sliding grooves (63). The lower surface of the support block (8) is provided with a first embedding hole (83). The bottom of the embedding groove (61) is provided with a second embedding hole (65). The two ends of the first compression spring (7) are embedded in the first embedding hole (83) and the second embedding hole (65). The slider (82) is pressed against the end of the sliding groove (63). The first compression spring (7) is in a compression spring state.

5. The pneumatic pressing device for a carpet bonding machine according to claim 4, characterized in that: The limiting hole (62) is provided with a threaded hole (64) that communicates with the sliding groove (63). An adjusting bolt (66) is provided in the limiting hole (62) that is threaded to the threaded hole (64) and has one end pressed against the slider (82). The adjusting bolt (66) does not affect the limiting shaft (102) from being embedded in the limiting hole (62).

6. The pneumatic pressing device for a carpet bonding machine according to claim 1, characterized in that: The support groove (81) is set on the top of the support block (8). The lifting shaft (41) is provided with a bearing (42) whose bottom is embedded in the support groove (81). The lifting shaft (41) is provided with a limiting ring (43) whose thickness gradually decreases in the direction away from the center line of the lifting shaft (41). After the lifting seat (91) rises, it matches the limiting ring (43) to lift the pressure roller (4) upward.

7. The pneumatic pressing device for a carpet bonding machine according to claim 1, characterized in that: Two lifting rails (3) are provided on one side of the frame (1), and pressure rollers (4) are provided between the two corresponding lifting rails (3). The distance between the two pressure rollers (4) is no more than 0.5 meters. A negative pressure suction mechanism (12) for vacuuming lint on the carpet is provided in the area between the two pressure rollers (4) of the frame (1). The negative pressure suction mechanism (12) includes a dust collection hood (121), a negative pressure pipe (122) connected to the top of the dust collection hood (121), a negative pressure vacuum cleaner (123) connected to the negative pressure pipe (122), and a square brush layer (124) set at the edge of the bottom opening (1211) of the dust collection hood (121) and abutting against the carpet.

8. The pneumatic pressing device for a carpet bonding machine according to claim 7, characterized in that: The dust collection hood (121) has openings (1211) at both its front and rear ends. An auxiliary dust collection housing (125) is raised and lowered at both ends of the dust collection hood (121) and connects to the openings (1211) in its natural state. Multiple guide sleeves (126) are provided at both ends of the dust collection hood (121). A vertical shaft (127) is provided on the auxiliary dust collection housing (125) and passes through the guide sleeves (126) in a vertical direction. A sleeve is fitted on the vertical shaft (127) that abuts against the top of the auxiliary dust collection housing (125). A third compression spring (128) is provided between the guide sleeves (126). A limiting block (129) is provided at the bottom of the end of the dust collection hood (121) to limit the minimum height of the auxiliary dust removal housing (125) to move downward. The lower opening (1211) of the auxiliary dust removal housing (125) abuts against the periphery of the pressure roller (4). When the pressure roller (4) moves upward under the action of the lifting cylinder (9), the pressure roller (4) drives the auxiliary dust removal housing (125) to move upward after overcoming the elastic force of the third compression spring (128).

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