A tool holder height automatic adjusting device

Abstract

The utility model discloses a knife rest height automatic regulating device, including the platform, the both sides of platform one end are installed with wallboard, be equipped with the knife rest between two wallboards, the length direction along its of knife rest is equipped with the through -hole of accommodating cloth to pass through, the bottom of knife rest is installed with the pressing plate, install the distance sensor and pressure sensor opposite with platform on the pressing plate, pressure sensor and distance sensor staggered setting, and pressure sensor is close to the edge of pressing plate, in addition, the bottom of pressure sensor and distance sensor all with the bottom surface of pressing plate are level. The cloth that cutting mechanism cuts is pressed on the platform by the pressing plate, when pressure sensor contacts with cloth, pressure sensor will signal transmission to the general controller of cloth spreading machine, and general controller will drive signal transmission to motor, makes motor stop working to prevent knife rest continue to move downward, to prevent cloth damage.

Description

Technical Field

[0001] This utility model relates to the field of fabric spreading machine technology, specifically to an automatic adjustment device for the height of a knife holder. Background Technology

[0002] Fabric spreading machines are mainly used in the pre-process of garment or textile production. They are responsible for unrolling rolls of fabric and laying them layer by layer on the cutting bed for subsequent cutting. During fabric spreading, the fabric is fed out from the outlet by a conveyor device, then clamped by a clamping device. The fabric is pulled by driving the clamping device. After spreading, the fabric is cut by a cutting mechanism. After cutting, the fabric is pressed firmly onto a support plate below the outlet by a pressure plate, and then the clamping device continues to spread new fabric. Due to the continuous spreading and cutting, the thickness of the fabric on the support plate gradually increases, causing the new fabric coming out of the outlet to rise higher and higher. This results in the cutting mechanism also rising higher and higher. If the lifting stroke of the cutting mechanism is not controlled, the pressure plate below the cutting mechanism may continue to move downwards after contacting the fabric, causing damage to the pressed fabric. In addition, most cutting mechanisms use hydraulic cylinders or chains for lifting. When using chains, the chains will lengthen due to wear and stretching during operation, resulting in loose chains that affect the stability of lifting. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic blade holder height adjustment device to solve the problems of excessive movement in current cutting mechanisms and loosening of chains.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] An automatic height adjustment device for a cutter holder includes a platform with wall panels installed on both sides of one end of the platform. A cutter holder is positioned between the two wall panels, and the cutter holder has through holes along its length to accommodate fabric. A pressure plate is installed at the bottom of the cutter holder, and a distance sensor and a pressure sensor are installed on the pressure plate opposite to the platform. The pressure sensor and the distance sensor are staggered, with the pressure sensor located near the edge of the pressure plate. Furthermore, the bottoms of both the pressure sensor and the distance sensor are flush with the bottom surface of the pressure plate. A drive shaft is rotatably connected to the upper part between the two wall panels, and the drive shaft is located on the upper part of the cutter holder. The drive shaft has chain lifting mechanisms installed at both ends, which are connected to the tool holder. The chain lifting mechanism includes sprockets fixed to both ends of the drive shaft, a chain connected to the two sprockets, a motor installed on the outer wall of one of the wall panels, and a motor shaft connected to the drive shaft. Lifting plates are fixedly connected to both ends of the tool holder. A load block is connected to one end of the chain, and the other end of the chain is connected to the corresponding lifting plate. The chain lifting mechanism also includes tensioning devices installed on the two wall panels, which tension the chain at one end of their respective ends.

[0006] Preferably, the tensioning device includes a first shaft and a second shaft fixed to the inner wall of the wall panel, a limiting plate movably connected to the first shaft, a third shaft fixedly connected to the limiting plate, and an electric telescopic rod movably connected to the second shaft. The chain is located between the first shaft and the second shaft. The end face of the limiting plate facing the chain is arc-shaped, and the telescopic end of the electric telescopic rod is movably connected to the third shaft.

[0007] In the above technical solution, when a worker finds that the chain at any end is loose, the electric telescopic rod at the corresponding end can be controlled to retract, causing the limiting plate to rotate along the first shaft. The limiting plate then squeezes the chain, keeping it in a taut state.

[0008] Preferably, a limit rod is fixedly connected to the upper part of the two wall panels near the drive shaft, and a limit wheel is rotatably connected to the limit rod via a rotary bearing. A gap is provided between the limit wheel and the sprocket to accommodate the movement of the chain.

[0009] The above technical solution, by setting a limit wheel, can restrict the movement of the chain within the gap between the sprocket and the limit wheel, thus preventing the chain from falling off the sprocket.

[0010] Preferably, the inner wall of the wall panel is provided with a vertical groove, and one end of the lifting plate is slidably disposed in the corresponding groove; the inner wall of the wall panel is also connected with a vertical guide rail, and the end of the knife holder is provided with two sets of opposing pulleys, which slide on both sides of the guide rail.

[0011] The above technical solution, by setting a slide groove, allows one end of the lifting plate to slide within the groove. When the chain drives the lifting plate to move, the cooperation between the pulley and the guide rail improves the stability of the tool holder lifting.

[0012] Preferably, the upper part between the two wall panels is fixedly connected by a crossbeam, and a cover with a bottom opening is connected to the two crossbeams, with the drive shaft located inside the cover.

[0013] The above technical solution, through the function of the cover, can protect the drive shaft and sprocket.

[0014] Preferably, one of the wall panels is equipped with a display screen.

[0015] In the above technical solution, the display screen is electrically connected to the main controller of the fabric spreading machine. The display screen can be used to display the distance between the blade holder and the platform, i.e., the total thickness of the fabric being pressed.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) A cutting mechanism is installed on the blade holder. The fabric cut by the cutting mechanism is pressed tightly onto the platform by the pressure plate. When the pressure sensor comes into contact with the fabric, the pressure sensor transmits a signal to the main controller of the fabric spreading machine. The main controller transmits a drive signal to the motor, causing the motor to stop working, thereby preventing the blade holder from continuing to move downward and thus preventing damage to the fabric. In addition, the distance sensor on the pressure plate senses the distance between the pressure plate and the platform, thereby measuring the thickness of the pressed fabric.

[0018] (2) When the chain becomes loose, the loose end of the chain can be tightened by the tensioning device to prevent instability caused by loosening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention after the chain has been removed;

[0020] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0021] Figure 3 This is a schematic diagram of the present invention after the tensioning device has been removed;

[0022] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0023] Figure 5 This is a schematic diagram of a chain drive mechanism;

[0024] Figure 6 This is a diagram illustrating how the knife holder presses the fabric onto the platform.

[0025] Figure 7 This is a schematic diagram showing the cooperation between this utility model and the cutting mechanism and clamping device;

[0026] In the diagram: 1-Platform, 2-Wall panel, 3-Knife holder, 4-Pressure plate, 5-Distance sensor, 6-Pressure sensor, 7-Drive shaft, 8-Sprocket, 9-Chain, 10-Lifting plate, 11-Weight block, 12-First shaft, 13-Second shaft, 14-Limiting plate, 15-Third shaft, 16-Electric telescopic rod, 17-Limiting wheel, 18-Slide groove, 19-Guide rail, 20-Pulley, 21-Crossbeam, 22-Cover, 23-Display screen, 24-Clamping device, 25-Cutting mechanism, 26-Fabric. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-6 An automatic height adjustment device for a cutter holder includes a platform 1. Wall panels 2 are installed on both sides of one end of the platform 1, and a cutter holder 3 is positioned between the two wall panels 2. The cutter holder 3 has through holes along its length to accommodate fabric. A cutting mechanism 25 is installed on the cutter holder 3 at the through holes, cutting the fabric. A pressure plate 4 is installed at the bottom of the cutter holder 3. The pressure plate 4 is Z-shaped and has staggered mounting holes. One mounting hole is located at the higher part of the pressure plate, and the other is located at the lower part. A distance sensor 5 is installed in the higher mounting hole, and a pressure sensor 6 is installed in the lower mounting hole. Both the distance sensor 5 and the pressure sensor 6 are positioned opposite the platform, with the pressure sensor 6 close to the edge of the pressure plate 4. Furthermore, the bottoms of both the pressure sensor 6 and the distance sensor 5 are flush with the bottom surface of the lower part of the pressure plate 4. This device is applied to a fabric spreading machine, which has a general PLC controller. In this embodiment, the distance sensor 5 and the pressure sensor 6 are electrically connected to the PLC controller.

[0030] Among them, distance sensor 5 is a reflective photoelectric sensor, with the transmitter and receiver combined, detecting the light reflected back from the object to measure the distance. Pressure sensor 6 is a strain gauge pressure sensor, which converts the physical pressure (mechanical signal) applied to it into a measurable electrical signal, which is transmitted to the PLC controller to sense the presence of the fabric.

[0031] A drive shaft 7 is rotatably connected to the upper part between the two wall panels 2 via a rotary bearing. The drive shaft 7 is located above the tool holder 3. Chain lifting mechanisms are installed at both ends of the drive shaft 7 and are connected to the tool holder 3 through the chain lifting mechanisms. The chain lifting mechanism includes sprockets 8 fixed to both ends of the drive shaft, a chain 9 connected to the two sprockets, and a motor installed on the outer wall of one of the wall panels. The motor shaft is connected to the drive shaft 7. Lifting plates 10 are fixedly connected to both ends of the tool holder 3. One end of the chain 9 is connected to a weight block 11, and the other end of the chain 9 is connected to the corresponding lifting plate 10.

[0032] During operation, the fabric enters through the cutter holder 3, is pulled by the clamping and pulling device 24, and then is cut by the cutting mechanism 25 on the cutter holder 3. The cut fabric falls onto the platform 1, and then the motor is started to drive the transmission shaft 7 to rotate. The transmission shaft 7, through the cooperation of two sprockets 8 and chain 9, pulls the cutter holder 3 down, so that the pressure plate 4 presses the fabric tightly onto the platform 1. Then the clamping and pulling device 24 starts to pull new fabric.

[0033] like Figure 6 As shown, when fabric 26 is pressed onto platform 1, distance sensor 5 measures the distance between it and platform 1, thus determining the fabric thickness. When the fabric thickness reaches a set value, distance sensor 5 transmits a signal to the PLC controller. The PLC controller then controls the clamping and pulling device 24 to stop working. After the fabric is removed, a new round of fabric pulling begins. Additionally, during the descent of pressure plate 4, pressure sensor 6 contacts the fabric and converts the applied physical pressure (mechanical signal) into a measurable electrical signal. This electrical signal is transmitted to the PLC controller, which then transmits the signal to the motor, causing the motor to stop working and preventing the pressure plate from continuing to descend, thus reducing damage to the fabric.

[0034] like Figure 4 , Figure 5 As shown, a limit rod is fixedly connected to the upper part of the two wall panels 2 near the drive shaft. A limit wheel 17 is rotatably connected to the limit rod through a rotary bearing. A gap is provided between the limit wheel 17 and the sprocket 8 to accommodate the movement of the chain 9.

[0035] The inner wall of the wall panel 2 is provided with a vertical groove 18, and one end of the lifting plate 10 is slidably disposed in the corresponding groove 18. The inner wall of the wall panel 2 is also connected to a vertical guide rail 19. Two sets of opposing pins are fixed to the end of the tool holder 3, and a pulley 20 is rotatably connected to each pin. The two opposing pulleys 20 slide on both sides of the guide rail 19. By providing grooves 18 on the wall panel 2, and with one end of the lifting plate 10 slidably connected in the grooves 18, the stability of the lifting and lowering of the tool holder 3 is improved when the chain 9 drives the lifting plate 10 to move, in addition to the cooperation of the pulleys 20 and the guide rail 19.

[0036] The chain lifting mechanism also includes tensioning devices mounted on the two wall panels, which tension the chain at one end of each device. Each tensioning device includes a first shaft 12 and a second shaft 13 fixed to the inner wall of the wall panel, a limiting plate 14 movably connected to the first shaft, a third shaft 15 fixedly connected to the limiting plate, and an electric telescopic rod 16 movably connected to the second shaft. The chain 9 is located between the first shaft 12 and the second shaft 13. The end face of the limiting plate 14 facing the chain is arc-shaped. The telescopic end of the electric telescopic rod 16 is movably connected to the third shaft 15. The electric telescopic rod is electrically connected to the PLC controller of the fabric spreading machine. When a worker discovers that the chain at either end is loose, they can control the electric telescopic rod 16 at the corresponding end to retract, causing the limiting plate 14 to rotate along the first shaft 12. The limiting plate 14 then compresses the chain 9, keeping it taut and improving the stability of the chain movement.

[0037] One of the wall panels 2 is equipped with a display screen 23, which is electrically connected to the PLC controller. The display screen 23 can be used to display the distance between the knife holder and the platform, i.e. the total thickness of the fabric being pressed, so that workers can observe the thickness of the fabric on the platform in a timely manner.

[0038] Example 2

[0039] Based on Embodiment 1, the upper part between the two wall panels 2 is fixedly connected by a crossbeam 21, and a cover 22 with a bottom opening is connected to the two crossbeams 21. The drive shaft 7 is located inside the cover 22. The cover can protect the drive shaft and sprocket.

[0040] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic tool holder height adjustment device, characterized in that: The system includes a platform (1), wall panels (2) installed on both sides of one end of the platform (1), a tool holder (3) between the two wall panels (2), a through hole along its length on the tool holder (3), a pressure plate (4) installed at the bottom of the tool holder (3), a distance sensor (5) and a pressure sensor (6) installed on the pressure plate (4) opposite to the platform, the pressure sensor (6) and the distance sensor (5) are staggered, and the pressure sensor (6) is close to the edge of the pressure plate (4); a drive shaft (7) is rotatably connected to the upper part between the two wall panels (2), the drive shaft (7) is located above the tool holder (3), and chain lifting mechanisms are installed at both ends of the drive shaft (7), and are connected to the tool holder (3) through the chain lifting mechanisms; The chain lifting mechanism includes sprockets (8) fixed at both ends of the drive shaft, a chain (9) connected to the two sprockets, a motor installed on the outer wall of one of the wall panels, the motor shaft of the motor being connected to the drive shaft (7), lifting plates (10) being fixedly connected to both ends of the tool holder (3), a load block (11) being connected to one end of the chain (9), and the other end of the chain (9) being connected to the corresponding lifting plate (10). The chain lifting mechanism also includes tensioning devices installed on the two wall panels, with the two tensioning devices tensioning the chain at one end of each side.

2. The automatic tool holder height adjustment device according to claim 1, characterized in that, The tensioning device includes a first shaft (12) and a second shaft (13) fixed to the inner wall of the wall panel, a limiting plate (14) movably connected to the first shaft, a third shaft (15) fixedly connected to the limiting plate, and an electric telescopic rod (16) movably connected to the second shaft. The chain (9) is located between the first shaft (12) and the second shaft (13). The end face of the limiting plate (14) facing the chain is arc-shaped. The telescopic end of the electric telescopic rod (16) is movably connected to the third shaft (15).

3. The automatic tool holder height adjustment device according to claim 2, characterized in that: A limit rod is fixedly connected to the upper part of the two wall panels (2) near the drive shaft. A limit wheel (17) is rotatably connected to the limit rod through a rotary bearing. A gap is provided between the limit wheel (17) and the sprocket (8) to accommodate the movement of the chain (9).

4. The automatic tool holder height adjustment device according to claim 3, characterized in that: The inner wall of the wall panel (2) is provided with a vertical groove (18), and one end of the lifting plate (10) is slidably disposed in the corresponding groove (18); the inner wall of the wall panel (2) is also connected with a vertical guide rail (19), and the end of the knife holder (3) is provided with two sets of opposing pulleys (20), which slide on both sides of the guide rail (19).

5. The automatic tool holder height adjustment device according to claim 4, characterized in that: The upper part between the two wall panels (2) is fixedly connected by a crossbeam (21), and a cover (22) with a bottom opening is connected to the two crossbeams (21). The drive shaft (7) is located inside the cover (22).

6. The automatic tool holder height adjustment device according to claim 5, characterized in that: A display screen (23) is installed on one of the wall panels (2).

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