Automatic original point finding structure and method for automatic bottom thread changing device of embroidery machine

Abstract

The invention discloses an automatic original point finding structure and method for automatic bottom thread changing devices of an embroidery machine, after each automatic bottom thread changing device is started and restarted, each automatic bottom thread changing device moves nearby along a transverse guide mechanism in a short distance to find a working original point, and if a working original point detection assembly detects a corresponding original point position, the working original point is found; if the automatic bottom line changing devices do not find the working original point, all the automatic bottom line changing devices run towards the first transverse side, the first automatic bottom line changing device in the transverse direction firstly runs to the corresponding original point position, and all the other automatic bottom line changing devices run towards the first automatic bottom line changing device in the transverse direction; when the other automatic bottom line replacing devices approach to the set distance, the other automatic bottom line replacing devices stop at the corresponding material disc replacing positions after running to the set distance; and then other automatic bottom line changing devices except the first transverse automatic bottom line changing device search for working original points from respective original points by taking the position as a reference.

Description

[Technical field]

[0001] The invention belongs to the technical field of embroidery equipment, and in particular relates to an automatic bottom thread changing device for an embroidery machine. [Background technology]

[0002] The automatic bobbin case changing device currently on the market achieves the purpose of automatically changing the bobbin case by automatically changing the bobbin case and the bobbin core. Referring to the Chinese invention patent application with publication number CN110340628A, a multi-station mechanical arm bobbin case changing device is disclosed, which can be responsible for the bobbin case changing work of several preset stations, including a horizontal guide mechanism and a bobbin case changing device, the bobbin case changing device includes a translation base, the horizontal guide mechanism includes a horizontal guide rail, the horizontal guide rail is arranged under the shuttle box of the embroidery machine, the horizontal guide rail extends along the connection direction of each shuttle box, and the translation base is slidably connected to the horizontal guide rail.

[0003] Generally, different numbers of heads of embroidery machines are equipped with different numbers of bobbin case replacement devices. Currently, there is generally one bobbin case replacement device for every 10 heads. After the replacement of the entire embroidery machine's bobbin thread is completed, all the bobbin case replacement devices will move along the horizontal guide mechanism to one end of the embroidery machine, waiting for the worker to replace the storage tray of the empty bobbin thread with the storage tray with the wound bobbin thread. After the replacement is completed, the reset button is manually pressed to reset each bobbin case replacement device to its initial position for replacing the bobbin thread in preparation for the next job, thereby completing the function of automatically changing the bobbin thread of the embroidery machine.

[0004] In the case of installing multiple bobbin case replacement devices, when all the bobbin case replacement devices are moved along the lateral guide mechanism to one end of the embroidery machine, but have not yet moved into position, if there is an unexpected shutdown or power outage during the movement, the bobbin case replacement device will not be able to find the origin, and the operation will be chaotic and the machine will crash. Similarly, when all the bobbin case replacement devices are moved along the guide rail to one end of the embroidery machine and moved into position, but because the workers are busy and fail to replace the storage tray in time, the machine will be shut down and the power will be cut off. When the machine is turned on, there will still be chaos and crash. In the above situation, in order to restore the automatic bottom line change to normal operation, the machine needs to be powered off, and the automatic bottom line changer needs to be manually pushed to the initial position of each device to change the bottom line, and then the power is turned on to find the position again before it can continue to work. This is not smart enough, resulting in increased labor intensity for workers and prone to errors. [Summary of the invention]

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a structure and method for automatically finding the origin of an automatic bobbin thread changing device of an embroidery machine, so as to avoid the situation where the automatic bobbin thread changing device cannot find the origin after starting the machine in the event of an unexpected shutdown or power outage.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] Firstly, a structure for automatically finding an origin of an automatic bobbin thread changing device of an embroidery machine is provided, wherein at least two automatic bobbin thread changing devices move along a transverse guide mechanism, and the transverse guide mechanism is provided with an origin position corresponding to each automatic bobbin thread changing device, and a working origin detection component is provided between the automatic bobbin thread changing device and the corresponding origin position, for detecting whether the automatic bobbin thread changing device has run to the corresponding origin position; and a distance measuring sensor is provided on the automatic bobbin thread changing device, for measuring the transverse distance between two adjacent automatic bobbin thread changing devices.

[0008] Preferably, the working origin detection component includes a working origin sensor provided on the automatic bottom line changing device and an origin position addressing baffle provided corresponding to the origin position of each automatic bottom line changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bottom line changing device runs to the corresponding origin position.

[0009] Preferably, the origin position addressing baffle is mounted on a baffle mounting seat, the transverse guiding mechanism comprises a transverse slide groove extending in the transverse direction, and the baffle mounting seat is mounted on the transverse slide groove.

[0010] Preferably, the origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side, the rear end of the horizontal side is fixed to the baffle mounting seat, the working origin sensor is provided with a U-shaped groove opening downward, and the vertical side passes through the U-shaped groove during operation.

[0011] Preferably, the distance measuring sensor is an infrared distance measuring sensor; or, the distance measuring sensor is a proximity switch.

[0012] Preferably, the lateral guide mechanism is provided with a material tray replacement position corresponding to the replacement storage tray position of each automatic bottom line changing device and a material tray replacement position sensor is provided corresponding to the replacement material tray position, and the replacement material tray position of the first automatic bottom line changing device coincides with the origin position.

[0013] Preferably, the transverse guide mechanism is provided with an automatic positioning structure corresponding to the origin position of the first automatic bottom thread changing device in the transverse direction.

[0014] Preferably, the lateral guide mechanism is provided with a laterally extending power transmission circuit, and the automatic bottom thread changing device is provided with a driving motor and a contact conductive mechanism, and the contact conductive mechanism is in sliding contact with the power transmission circuit for conduction; the driving motor is connected to the contact conductive mechanism and is used to drive the automatic bottom thread changing device to move along the lateral guide mechanism.

[0015] On the other hand, a method for automatically finding the origin of an automatic bottom line changing device of an embroidery machine is also provided, comprising the following steps:

[0016] After each automatic bottom thread changing device is turned on and restarted, it moves a short distance along the lateral guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found.

[0017] Furthermore, if the automatic bottom thread changing device fails to find the working origin, all automatic bottom thread changing devices run toward the first horizontal side, among which the first automatic bottom thread changing device runs to the corresponding origin first, and all other automatic bottom thread changing devices run toward the first automatic bottom thread changing device. When each of the other automatic bottom thread changing devices approaches the set distance, each of the other automatic bottom thread changing devices runs to the set distance and then stops at the corresponding material tray replacement position; then, the other automatic bottom thread changing devices except the first automatic bottom thread changing device take this position as a reference and search for the working origin toward their respective origins.

[0018] The present invention adopts the above technical scheme and has the following technical effects: when the automatic bottom thread changing device is accidentally shut down or powered off, after it is restarted, it can first move a short distance along the lateral guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found; if the working origin is not found, after the first automatic bottom thread changing device in the horizontal direction runs to the corresponding origin position, the other automatic bottom thread changing devices can continue to run to their respective working origin positions to find the working origin according to the measurement result of the distance measuring sensor, that is, the relative distance from the first automatic bottom thread changing device in the horizontal direction and the two adjacent automatic bottom thread changing devices. In this way, the problems of chaotic operation of the device and collision caused by unexpected power failure when starting the machine can be solved.

[0019] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0020] The invention will be further described below in conjunction with the accompanying drawings:

[0021] Figure 1 It is a partial structural diagram of a multi-station automatic bottom line changing device;

[0022] Figure 2 This is a side view of the multi-station automatic bottom line changing equipment where the automatic bottom line changing device is located on the side of the storage tray;

[0023] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the structure of the conductive copper sheet and the insulating circuit support plate;

[0025] Figure 5 It is a schematic diagram of the automatic bottom thread changing device running along the lateral guide mechanism;

[0026] Figure 6 It is a structural schematic diagram of the contact conductive mechanism;

[0027] Figure 7 It is a schematic diagram of two automatic bottom thread changing devices running along the lateral guide mechanism;

[0028] Figure 8 It is a schematic diagram of the setting structure of the automatic bottom line changing device of the embroidery machine to automatically find the origin;

[0029] Fig. 9 It is a schematic diagram of the three automatic bottom thread changing devices returning to the material tray replacement position along the lateral guide mechanism;

[0030] Figure numerals: automatic thread changing device 1, 1# automatic thread changing device 101, 2# automatic thread changing device 102, 3# automatic thread changing device 103, body 11, storage tray 12, manipulator assembly 13, transverse slider 14, contact conductive mechanism 15, fixed seat 151, insulating swing arm 152, conductive sheet 153, transverse extension section 1531, horizontal extension section 1532, branch insulating swing arm 154, pin 155, torsion spring 156, power drive assembly 16, drive motor 161, drive Gear 162, distance sensor 17, working origin sensor 18, U-shaped groove 181, lateral guide mechanism 2, bracket 20, lateral slide groove 201, lateral guide rail 21, lateral rack 22, insulating circuit support plate 23, mounting groove 231, conductive copper strip 232, 1# origin position addressing baffle 24, 2# origin position addressing baffle 25, baffle mounting seat 251, 2# material tray replacement position sensor 26, 3# material tray replacement position sensor 27, shuttle box body 3, rotary shuttle 31, shuttle core 32, shuttle case 33. [Specific implementation method]

[0031] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0032] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0033] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "back", "X direction", "Y direction", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0037] like Figure 1As shown, the multi-station automatic bottom thread changing device includes a transverse guide mechanism 2 and an automatic bottom thread changing device 1. For a multi-head embroidery machine, multiple sets of machine heads and shuttle boxes are correspondingly arranged in the transverse direction, wherein the upper side is the machine head and the lower side corresponds to the shuttle box 3, on which the shuttle box 3 is provided with a rotary hook 31 and a bottom thread installed on the rotary hook. The bottom thread here refers to a combination kit of a bobbin core 32 and a bobbin case 33 for placing the bottom thread. If the bottom thread is used up, the bottom thread needs to be replaced, and the automatic bottom thread changing device 1 is used to replace the bottom thread. The transverse guide mechanism 2 is arranged below the shuttle box 3 and extends in the transverse direction. Its length is sufficient to cover the arrangement length of all shuttle boxes 3, so as to ensure that the automatic bottom thread changing device 1 runs along the transverse guide mechanism 2 and can run to the corresponding position of the shuttle box 3 to complete the bottom thread changing work. Among them, the number of automatic bottom thread changing devices 1 can be one or more, because the number of heads of multi-head embroidery machines is increasing, and usually multiple automatic bottom thread changing devices 1 are also provided, and each automatic bottom thread changing device 1 is responsible for the combination of a corresponding number of machine heads and shuttle boxes to change the bottom thread.

[0038] The automatic bottom thread changing device 1 includes a storage tray 12 for placing multiple bottom threads and a manipulator assembly 13 for automatically changing bottom threads. The storage tray 12 and the manipulator assembly 13 are installed on the body 11. The storage tray 12 can rotate. The storage tray is provided with multiple storage positions for placing bottom threads along the circumference, and at least one empty position is reserved. The manipulator assembly 13 replaces the used bottom thread on the rotary hook and places it on the empty position of the storage tray 12, and places the unused bottom thread on the storage tray 12 on the rotary hook. Of course, if there is no unused bottom thread on the storage tray, the storage tray needs to be replaced as a whole.

[0039] Therefore, the method adopted by the automatic bottom line changing device 1 in the prior art to change the bottom line is: the storage tray is equipped with a bobbin core and a bobbin case with a wound bottom line, which are referred to as bottom lines here. Generally, 10 wound bottom lines are stored, and an empty space is reserved for the replacement bottom line. When the bottom line needs to be replaced, the manipulator assembly 13 will take out the empty bottom line on the shuttle of the embroidery machine and place it in the empty space reserved in the storage tray. Then, the manipulator assembly 13 is lifted, the storage tray 12 rotates, and the wound bottom line is rotated to a position where the manipulator assembly 13 can grab it. At this time, the manipulator assembly 13 grabs a wound bottom line and places it in the shuttle of the embroidery machine, completing the replacement of the bottom line of one head of the embroidery machine. When the bottom line corresponding to the next head needs to be replaced, the automatic bottom line changing device moves to the next head position with the storage tray 12 along the lateral guide mechanism 2, and then the manipulator assembly 13 repeats the cycle of the first head changing bottom line action to complete the replacement of the second head bottom line, and so on, to complete the replacement of the corresponding bottom line of the entire embroidery machine head.

[0040] Generally, different numbers of heads of embroidery machines are equipped with different numbers of automatic bobbin thread changing devices. Currently, there is generally one automatic bobbin thread changing device for every 10 heads. When the bobbin thread of the entire embroidery machine is replaced, all the automatic bobbin thread changing devices will move to one end of the embroidery machine along the horizontal guide mechanism 2, waiting for the worker to replace the empty bobbin thread storage tray with the bobbin thread storage tray. After the replacement is completed, the reset button is manually pressed to reset each automatic bobbin thread changing device to its initial position for replacing the bobbin thread, in preparation for the next work, thereby completing the automatic bobbin thread changing function of the embroidery machine.

[0041] like Figures 1 to 9 As shown, the lateral guide mechanism is provided with an origin position corresponding to each automatic bobbin thread changing device. For example, an automatic bobbin thread changing device can automatically change the bobbin thread for 10 embroidery machine heads. For every head distance of 10 embroidery machine heads, an origin position is provided corresponding to an automatic bobbin thread changing device. For example, if an embroidery machine has 30 heads, a total of 3 automatic bobbin thread changing devices are installed, namely, 1# automatic bobbin thread changing device 101, 2# automatic bobbin thread changing device 102, and 3# automatic bobbin thread changing device 103 in the lateral direction, wherein 1# automatic bobbin thread changing device 101 is the first automatic bobbin thread changing device in the lateral direction.

[0042] In order to avoid the situation that the automatic bobbin changing device cannot find the origin after starting up due to unexpected shutdown or power outage, the present invention is designed with an automatic origin finding structure, including a working origin detection component arranged between the automatic bobbin changing device and the corresponding origin position, for detecting whether the automatic bobbin changing device has run to the corresponding origin position. The automatic bobbin changing device 1 is provided with a distance measuring sensor 17 for measuring the lateral distance between two adjacent automatic bobbin changing devices.

[0043] The working origin detection component includes a working origin sensor 18 provided on the automatic bottom thread changing device and an origin position addressing baffle provided corresponding to the origin position of each automatic bottom thread changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bottom thread changing device has run to the corresponding origin position. Taking the example of setting three automatic bottom thread changing devices, three origin position addressing baffles are installed. Figure 8 The lateral local structure of the embroidery machine is illustrated. A 1# origin position addressing baffle 24 is provided corresponding to the 1# automatic bobbin thread changing device 101, a 2# origin position addressing baffle 25 is provided corresponding to the 2# automatic bobbin thread changing device 102, and a 3# origin position addressing baffle is provided corresponding to the 3# automatic bobbin thread changing device 103 (not illustrated due to length reasons).

[0044] In addition, the lateral guide mechanism 2 is provided with an automatic positioning structure corresponding to the origin position of the first lateral automatic bottom thread changing device. The automatic bottom thread changing device and the automatic positioning structure are mechanically fixed, for example, fixed by a snap-fit ​​structure, so that after the first automatic bottom thread changing device runs to the origin, it can be automatically positioned according to the information of the working origin sensor, or in combination with the automatic positioning structure.

[0045] Specifically, the origin position addressing baffle is installed on the baffle mounting seat 251, the lateral guide mechanism includes a lateral slide groove 201 extending in the lateral direction, and the baffle mounting seat 251 is installed on the lateral slide groove 201. The lateral slide groove 201 is a T-shaped groove, and the baffle mounting seat 251 is provided with a T-shaped portion to cooperate with the T-shaped groove, and the installation position can be adjusted. It can be fixed by a locking screw at the set installation position. The origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side length, and the rear end of the horizontal side is fixed to the baffle mounting seat. The working origin sensor is provided with a U-shaped groove 181 opening downward, and the vertical side passes through the U-shaped groove during operation. The working origin sensor can be an infrared sensor, which can be sensed when the origin position addressing baffle enters the U-shaped groove.

[0046] Preferably, the distance measuring sensor 17 may be an infrared distance measuring sensor, or a proximity switch, or other sensors with similar functions.

[0047] Furthermore, the lateral guide mechanism 2 is provided with a material tray replacement position corresponding to the material tray replacement position of each automatic thread changing device 1, and a material tray replacement position sensor is provided corresponding to the material tray replacement position. The material tray replacement position of the first automatic thread changing device in the lateral direction coincides with the origin position. This is because there are many embroidery machine heads, resulting in a relatively long overall length. It would be hard for workers to run to the working origin of each automatic thread changing device to replace the material tray. Therefore, after each automatic thread changing device is completed, it is concentrated at one end of the embroidery machine to wait for the worker to replace the material tray, which can save the worker's physical strength. Therefore, all the material tray replacement positions and the corresponding material tray replacement position sensors are arranged close to the first lateral side, and the origin position of the 1# automatic thread changing device itself corresponds to one end of the embroidery machine. The material tray position and the working origin can share a sensor. For example, only the 1# origin position addressing baffle 24 is set, and there is no need to set the 1# material tray replacement position sensor, but the 2# material tray replacement position sensor 26 is set corresponding to the 2# automatic thread changing device 102, and the 3# material tray replacement position sensor 27 is set corresponding to the 3# automatic thread changing device 103. When it is necessary to change the material tray, other automatic bottom thread changing devices run to the 1# automatic bottom thread changing device 101 to find the corresponding material tray replacement position.

[0048] According to the above automatic origin finding structure, when the automatic thread changing device is accidentally shut down or powered off, after restarting, combined with some control logic, the automatic origin finding method can be executed. The automatic origin finding method of the automatic thread changing device of the embroidery machine includes the following steps:

[0049] After each automatic bottom thread changing device is turned on and restarted, it moves a short distance along the lateral guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found;

[0050] If the automatic thread-changing device fails to find the working origin, all automatic thread-changing devices will run to the first side in the horizontal direction, among which the first automatic thread-changing device in the horizontal direction will run to the corresponding origin first (the origin of the first group of devices is mechanically fixed, and the working origin will be found as long as it runs to the end in one direction), and all other automatic thread-changing devices will run to the first automatic thread-changing device in the horizontal direction. When other automatic thread-changing devices are close to the set distance, the infrared distance sensor or proximity switch will send a signal to the control panel, and the control panel will control each device to run to the set distance and stop at the corresponding material tray replacement position (when the material tray needs to be replaced, it will be replaced, and if not, it will not be replaced, and it is up to the workers to judge);

[0051] Then, other automatic bottom thread changing devices except the first automatic bottom thread changing device in the horizontal direction use this position as a reference to search for the working origin towards their respective origin positions.

[0052] By finding the working origin in this way, you can operate based on the working origin, which can solve problems such as chaotic operation and collision of the device when starting up due to unexpected power outages.

[0053] Reference Figure 1 As shown, the automatic thread-changing device 1 is provided with a power drive assembly 16, which cooperates with the transverse guide mechanism 2 to realize the transverse movement of the automatic thread-changing device along the transverse guide mechanism 2. The power drive assembly 16 includes a drive motor 161 and a power output component connected to the drive motor 161, and the power output component cooperates with the transverse guide mechanism to drive the automatic thread-changing device to move. A power supply structure is provided between the automatic thread-changing device 1 and the transverse guide mechanism 2 to supply power to the power drive assembly 16.

[0054] In order to avoid the risk of being stuck and not conducting electricity in the existing power supply method, the power supply method between the automatic bottom line changing device 1 and the lateral guide mechanism 2 can be improved, for example, a slingshot power supply method is adopted.

[0055] like Figures 1 to 6 As shown, the power supply structure includes a power transmission circuit arranged at the front side of the lateral guide mechanism 1 and extending in the lateral direction, and a contact conductive mechanism 15 arranged on the automatic bottom thread changing device 1 , and the contact conductive mechanism 15 is connected to the driving motor 161 .

[0056] The plane where the power transmission circuit is located is arranged vertically, and the contact conductive mechanism includes a fixed seat 151, an insulating swing arm 152 hinged to the fixed seat through a pin shaft 155, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet 153 installed on the insulating swing arm. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the power transmission circuit is located with the pin shaft as a fulcrum, and makes the conductive sheet elastically fit the power transmission circuit.

[0057] Furthermore, the insulating swing arm 152 is hingedly connected to a branch insulating swing arm 154 through a pin shaft, a second spring is provided between the branch insulating swing arm 154 and the insulating swing arm 152, and a conductive sheet 153 is installed on the branch insulating swing arm 154. The second spring drives the branch insulating swing arm to swing horizontally relative to the plane where the power transmission circuit is located with the pin shaft as a fulcrum, and makes the conductive sheet elastically fit the power transmission circuit.

[0058] Preferably, the first spring and the second spring are torsion springs 156, which are mounted on the pin 155 to drive the insulating swing arm 152 and the branch insulating swing arm 154 to twist. Therefore, under the action of the torsion spring, the insulating swing arm and the branch insulating swing arm both swing toward the lateral guide mechanism 2, and make the conductive sheet 153 contact the power transmission circuit for conduction.

[0059] Furthermore, the conductive sheet 153 is provided with a transverse extension section 1531, and the head of the transverse extension section is in contact with the power transmission circuit. The conductive sheet 153 is provided with a horizontal extension section 1532, and the insulating swing arm 152 and the branch insulating swing arm 154 are provided with a horizontal fixing surface that is in contact with the horizontal extension section 1532 and fixed by screws, so that the conductive sheet 153 is fixed to the insulating swing arm 152 and the branch insulating swing arm 154.

[0060] The above-mentioned power supply structure adopts a slingshot-type power supply method. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the power transmission circuit is located with the pin shaft as the fulcrum, and makes the conductive sheet elastically fit the power transmission circuit. The reaction force of the transmission circuit on the conductive sheet during operation is opposite to the swinging direction, and it is not easy to deform the conductive sheet, thus overcoming the risk of stuck and non-conductivity in the prior art that uses brushes to contact the conductive sheet for conduction.

[0061] Moreover, the slingshot-type charging method has been used in trams and high-speed railways for many years, and its efficient and stable performance has been fully verified. Applying it to the automatic bottom thread changing device can greatly improve the stability and service life of the automatic bottom thread changing device. At the same time, it can also further improve the operating speed of the automatic bottom thread changing device, thereby improving its efficiency.

[0062] In addition, the automatic bottom line changing device and the host signal transmission in the prior art adopt the signal transmission method of wireless communication. Although wireless communication has been widely used, when using wireless communication, interference is encountered in some special occasions, and information communication is often poor. If the equipment is installed near the interference source, it will not work. The only solution is to move the factory and increase the customer's operating costs. In response to this problem, the present invention combines the slingshot-type power connection method with the communication function, that is, the lateral guide mechanism 2 is also provided with a communication circuit extending in the lateral direction, and the contact conductive mechanism 15 is provided with a conductive sheet that is in contact with the communication circuit.

[0063] The communication circuit and the power transmission circuit have the same structure, and both use conductive copper bars 232. Specifically, the transverse guide mechanism 2 includes a bracket 20, a transverse guide rail 2 installed on the bracket, and an insulating circuit support plate 23, and the power transmission circuit and the communication circuit are installed on the insulating circuit support plate 23. In this embodiment, the power transmission circuit includes at least two groups of conductive copper bars 232 arranged side by side, the communication circuit includes at least one row of conductive copper bars 232, and the insulating circuit support plate 23 is provided with a mounting groove 231 for mounting the conductive copper bars.

[0064] In this way, not only a power transmission circuit but also a communication circuit is laid on the transverse guide mechanism 2, that is, a "power transmission plus signal communication type electric shock guide rail" is formed. As shown in the figure, the "power transmission plus signal communication type electric shock guide rail" uses four rows of wires, that is, two power lines and two signal lines. For example, the two rows of wires on the upper side are power lines, corresponding to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the upper side, and the two rows of wires on the lower side are communication signal lines, corresponding to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the lower side. However, three rows of wires, that is, two power lines and one signal line, or five rows of wires or more rows of wires, can complete the functions required by this device. Of course, if the communication function is not considered, two power lines are sufficient, but if the communication function is considered, at least three rows of wires are required.

[0065] The above technical solution, since the contact conductive mechanism 15 and the power transmission circuit and the communication circuit adopt a slingshot contact conductive method, not only ensures the stability of the power supply, but also avoids the signal interference problem to the greatest extent, ensuring the stable operation of the equipment under various complex situations.

[0066] In order to completely avoid the risk of the brush and the conductive sheet being stuck and not conducting electricity in the prior art, as another embodiment, the contact power supply structure may not be provided, or a power drive assembly 16 may be provided on each automatic thread changing device 1 while the traditional power supply structure is provided. Figure 7As shown, the power drive assembly 16 also includes a power battery 163, and the power output component here is a driving gear 162. The power battery 163 is used to power the driving motor 161. There is no need to contact the power supply. During operation, the power supply part of the automatic bottom line changing device does not contact the lateral guide mechanism, thereby avoiding problems caused by power supply during the operation of the automatic bottom line changing device on the lateral guide mechanism.

[0067] In addition, the transverse guide mechanism 2 includes a contact charging seat, which is installed at a fixed position on one side of the transverse guide rail. The automatic thread-changing device 1 is provided with a charging interface, and the charging connector is plugged into the charging interface to charge the power battery 163. Of course, it is also possible that one of the contact charging seat and the automatic thread-changing device is provided with a charging interface, and the other is provided with a charging connector. Wireless charging technology can also be used, and the transverse guide mechanism 2 is provided with a wireless charging seat, and the automatic thread-changing device 1 is provided with a wireless charging circuit, which is wirelessly connected to the wireless charging seat to charge the power battery 163. In this way, the automatic thread-changing device 1 is charged in the standby state.

[0068] Of course, referring to the prior art, in order to realize the self-propelled operation of the automatic bottom thread changing device 1, the power drive assembly 16 cooperates with the upper part of the transverse guide mechanism to form a self-propelled mechanism. Specifically, the transverse guide mechanism is also provided with a transverse rack 22 arranged parallel to the transverse guide rail 21, and the power output component is a driving gear 162 meshed with the transverse rack, and the driving motor 161 is connected to the driving gear 162. The driving motor 161 drives the driving gear 162, thereby driving the entire automatic bottom thread changing device 1 to translate on the transverse guide rail 21 and accurately position.

[0069] In addition, the transverse rack 22 is arranged below the transverse guide rail 21, and the tooth surface is downward. The driving gear is a spur gear. The automatic bottom line changing device 1 is provided with a transverse slider 14 that is slidably matched with the transverse guide rail 21.

[0070] It is understandable that the transmission structure of the driving gear 162 and the transverse rack 22 can also be replaced by other transmission structures. For example, the transverse guide mechanism is provided with a synchronous belt to replace the transverse rack, the power output component is a synchronous pulley meshed with the synchronous belt, and the drive motor drives the synchronous pulley to rotate. For another example, the transverse guide mechanism is provided with a chain to replace the transverse rack, the power output component is a sprocket meshed with the chain, and the drive motor drives the sprocket to rotate.

[0071] Preferably, the driving motor is a stepping motor, the power battery is a lithium battery, and the driving motor is installed at the bottom of the automatic bottom thread changing device.

[0072] Furthermore, according to the signal of the distance measuring sensor 17, if the distance is too close, the operation can be stopped to avoid collision. The automatic bottom thread changing device is provided with a wireless communication module, and receives a wireless control signal through the wireless communication module to realize self-propelled operation.

[0073] The above is only a specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. The automatic bottom line changing device of the embroidery machine automatically finds the origin structure, at least two automatic bottom line changing devices move along the transverse guide mechanism, and the transverse guide mechanism is provided with an origin position corresponding to each automatic bottom line changing device, characterized in that: A working origin detection component is provided between the automatic bobbin thread changing device and the corresponding origin position, which is used to detect whether the automatic bobbin thread changing device has run to the corresponding origin position; a distance measuring sensor is provided on the automatic bobbin thread changing device, which is used to measure the lateral distance between two adjacent automatic bobbin thread changing devices.

2. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 1 is characterized in that: The working origin detection component includes a working origin sensor arranged on the automatic bottom thread changing device and an origin position addressing baffle arranged corresponding to the origin position of each automatic bottom thread changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bottom thread changing device runs to the corresponding origin position.

3. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 2 is characterized in that: The origin position addressing baffle is installed on a baffle mounting seat, the transverse guiding mechanism includes a transverse sliding groove extending in the transverse direction, and the baffle mounting seat is installed on the transverse sliding groove.

4. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 3 is characterized in that: The origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side. The rear end of the horizontal side is fixed to the baffle mounting seat. The working origin sensor is provided with a U-shaped groove opening downward, and the vertical side passes through the U-shaped groove during operation.

5. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 1 is characterized in that: The distance measuring sensor is an infrared distance measuring sensor; or, the distance measuring sensor is a proximity switch.

6. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 1 is characterized in that: The lateral guide mechanism is provided with a material tray replacement position corresponding to the replacement storage tray position of each automatic bottom line changing device and a material tray replacement position sensor is provided corresponding to the replacement material tray position. The replacement material tray position of the first automatic bottom line changing device coincides with the origin position.

7. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 1 is characterized in that: The lateral guide mechanism is provided with an automatic positioning structure corresponding to the origin position of the first lateral automatic bottom thread changing device.

8. The automatic origin finding structure of the automatic thread changing device of the embroidery machine according to claim 1 is characterized in that: The lateral guide mechanism is provided with a laterally extending power transmission circuit, and the automatic bottom thread changing device is provided with a driving motor and a contact conductive mechanism, and the contact conductive mechanism is in sliding contact with the power transmission circuit for conduction; the driving motor is connected to the contact conductive mechanism and is used to drive the automatic bottom thread changing device to move along the lateral guide mechanism.

9. A method for automatically finding the origin of an automatic thread changing device of an embroidery machine, characterized in that: The steps include: After each automatic bottom thread changing device is turned on and restarted, it moves a short distance along the lateral guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found.

10. The method for automatically finding the origin of an automatic bobbin thread changing device of an embroidery machine according to claim 9, characterized in that: If the automatic bottom thread changing device fails to find the working origin, all automatic bottom thread changing devices will run toward the first horizontal side, among which the first automatic bottom thread changing device in the horizontal direction will run to the corresponding origin first, and all other automatic bottom thread changing devices will run toward the first automatic bottom thread changing device in the horizontal direction. When each of the other automatic bottom thread changing devices approaches the set spacing, each of the other automatic bottom thread changing devices will run to the set spacing and then stop at the corresponding material tray replacement position; then, the other automatic bottom thread changing devices except the first automatic bottom thread changing device in the horizontal direction will use this position as a reference to search for the working origin toward their respective origins.

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