Screen printing machine with safety guard
By setting the upper and lower parts of the first and second through-beam sensors monitoring the operation openings and the third through-beam sensor monitoring the side opening on the screen printing machine, the problem of insufficient safety monitoring effect of existing screen printing machines is solved, and all-round safety monitoring and cost control are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI CSG NEW ENERGY MATERIALS TECH CO LTD
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-21
AI Technical Summary
The existing screen printing machines have insufficient safety monitoring capabilities, posing safety hazards, and the high cost of array-type monitoring devices increases equipment costs.
The system employs first and second through-beam sensors to monitor the upper and lower parts of the screen printing machine's operating opening, respectively, and combines this with a third through-beam sensor to monitor the side opening, forming a comprehensive safety protection device. This reduces blind spots, improves safety, and controls the lifting drive to stop via a control module to prevent collisions.
It enables comprehensive monitoring of the screen printing machine's operating opening, reducing equipment costs, improving production safety, and avoiding lifting collisions caused by obstacles, thus lowering equipment costs.
Smart Images
Figure CN224528255U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screen printing machines, and in particular to a screen printing machine with a safety protection device. Background Technology
[0002] Some existing screen printing machines have a liftable screen printing frame and a lifting drive to move the frame up and down. The screen printing frame can descend onto the workpiece to be screen printed, and then rise back up to detach from the workpiece for easy replacement of the next workpiece. During the lifting process, to prevent obstacles or personnel from accidentally entering the lifting path through the operating opening, a set of monitors is usually installed above the operating opening. The monitors are electrically connected to the control module of the screen printing machine. When the monitors detect a person entering, the control module and the lifting drive can stop the screen printing frame from moving. This type of screen printing machine is not effective at detecting foreign objects and poses a safety hazard. Some existing screen printing machines arrange multiple monitors in both the horizontal and vertical directions at the operating opening to form an array monitoring system, but the manufacturing cost of this type of screen printing machine is too high. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a screen printing machine with a safety protection device, which can achieve better monitoring, improve production safety, and has a relatively low cost.
[0004] A screen printing machine with a safety protection device according to an embodiment of the present invention includes a screen printing machine body and a safety protection device. The screen printing machine body has a lifting area, and a first column and a second column are provided on one side of the lifting area. The screen printing machine body also includes a screen printing frame and a lifting drive. The screen printing frame is liftable and located within the lifting area. The lifting drive is used to drive the screen printing frame to lift. An operating opening is formed between the first column and the second column, and the operating opening communicates with the lifting area. The screen printing machine body includes a control module, which is electrically connected to the lifting drive. The safety protection device is disposed on the screen printing machine body and includes a first monitor and a second monitor. The first monitor monitors the upper part of the operating opening, and the second monitor monitors the lower part of the operating opening. The first monitor and the second monitor are respectively electrically connected to the control module.
[0005] The screen printing machine with safety protection device according to the present utility model embodiment has at least the following beneficial effects: the safety protection device monitors the upper part of the operating opening by setting a first monitor, which can detect whether a human body or a suspended object enters the lifting area through the operating opening; the safety protection device monitors the lower part of the operating opening by setting a second monitor, which can detect whether a foreign object placed on the ground enters the lifting area through the operating opening. The two work together to monitor the operating opening relatively completely, reduce blind spots, cover conventional monitoring situations, improve production safety, and eliminate the need for too many monitors, thereby reducing equipment costs.
[0006] According to some embodiments of the present invention, the first monitor is a first through-beam sensor, which includes a first light emitter and a first light receiver. The first light emitter is disposed on the upper part of the first column, and the first light receiver is disposed on the upper part of the second column, with the first light emitter and the first light receiver facing each other.
[0007] According to some embodiments of the present invention, the height of the first monitor is A, which satisfies 1.8m≤A≤2m.
[0008] According to some embodiments of the present invention, the second monitor is a second through-beam sensor, which includes a second light emitter and a second light receiver. The second light emitter is disposed at the lower part of the first column, and the second light receiver is disposed at the lower part of the second column, with the second light emitter and the second light receiver facing each other.
[0009] According to some embodiments of the present invention, the height of the second monitor is B, which satisfies 0.3m≤B≤0.5m.
[0010] According to some embodiments of the present invention, the screen printing machine body is further provided with a third column, the third column being adjacent to the first column, and a side opening being formed between the third column and the first column. The operation opening is located on one side of the lifting area along the horizontal direction, and the side opening is located on the other side of the lifting area along the horizontal direction. The operation opening is adjacent to the side opening. The safety protection device further includes a third monitor, which is used to monitor the side opening. The third monitor is electrically connected to the control module.
[0011] According to some embodiments of the present invention, the third monitor is a third through-beam sensor, which includes a third light emitter and a third light receiver. The third light emitter is disposed on the third column, and the third light receiver is disposed on the first column, with the third light emitter and the third light receiver facing each other.
[0012] According to some embodiments of the present invention, the screen printing frame is slidably connected to the first column, the second column and the third column in the vertical direction; the screen printing frame is provided with a stop block, the stop block is located at the operating opening, and the stop block can be opposite to the first monitor or the second monitor in the horizontal direction.
[0013] According to some embodiments of the present invention, the first monitor includes a first light transmitter and a first light receiver, and protective shells are respectively provided on the outer sides of the first light transmitter and the first light receiver. The second monitor includes a second light transmitter and a second light receiver, and protective shells are respectively provided on the outer sides of the second light transmitter and the second light receiver. The protective shells are provided with light-transmitting ports.
[0014] According to some embodiments of the present invention, a defogging heater is provided inside the protective shell.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a three-dimensional schematic diagram of a portion of the structure of a screen printing machine according to an embodiment of the present utility model;
[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 A magnified view of a portion at point D;
[0019] Figure 3 This is an embodiment of the present utility model. Figure 1 A magnified view of a portion of point E.
[0020] Figure label:
[0021] Lifting area 110, first column 120, second column 130, third column 140, operating opening 150, side opening 160, stop block 170;
[0022] First monitor 210, first light transmitter 211, first light receiver 212, second monitor 220, second light transmitter 221, second light receiver 222, third monitor 230, third light transmitter 231, third light receiver 232. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0027] Reference Figures 1 to 3 This invention relates to a screen printing machine with a safety protection device, comprising a screen printing machine body and a safety protection device. The screen printing machine body has a lifting area 110. A first column 120 and a second column 130 are provided on one side of the lifting area 110. The screen printing machine body also includes a screen printing frame and a lifting driver. The screen printing frame is height-adjustable and located within the lifting area 110. The lifting driver drives the screen printing frame to rise and fall. An operating opening 150 is formed between the first column 120 and the second column 130, communicating with the lifting area 110. The screen printing machine body includes a control module electrically connected to the lifting driver. The safety protection device is located on the screen printing machine body and includes a first monitor 210 and a second monitor 220. The first monitor 210 monitors the upper part of the operating opening 150, and the second monitor 220 monitors the lower part of the operating opening 150. The first monitor 210 and the second monitor 220 are respectively electrically connected to the control module.
[0028] The safety protection device monitors the upper part of the operating opening 150 by setting a first monitor 210, which can detect whether a person or a hoisted object enters the lifting area 110 through the operating opening 150; the safety protection device monitors the lower part of the operating opening 150 by setting a second monitor 220, which can detect whether foreign objects placed on the ground enter the lifting area 110 through the operating opening 150. The two devices work together to monitor the operating opening 150 relatively completely, reduce blind spots, cover routine monitoring situations, improve production safety, and reduce equipment costs by eliminating the need for too many monitors.
[0029] In this embodiment, the first monitor 210 is a first through-beam sensor, which includes a first light emitter 211 and a first light receiver 212. The first light emitter 211 is located on the upper part of the first column 120, and the first light receiver 212 is located on the upper part of the second column 130, with the first light emitter 211 and the first light receiver 212 facing each other. The first light emitter 211 emits a first light beam, and the first light receiver 212 receives the first light beam. When a human body or a suspended foreign object enters the lifting area 110 through the operating opening 150, the first light beam will be blocked, preventing the first light receiver 212 from receiving the light beam signal. At this time, the control module can determine that there is an obstacle in the lifting area 110 and control the lifting drive to stop, so as to avoid collisions during the lifting of the screen printing frame. Optionally, the positions of the first light emitter 211 and the first light receiver 212 can be interchanged.
[0030] Specifically, when the control module stops the screen printing frame from lifting, the screen printing machine is also equipped with audible and visual warning devices, such as a buzzer and warning lights, to alert the operator to perform maintenance. After maintenance is completed, the operator can manually restart the screen printing frame's lifting function.
[0031] In this embodiment, the height of the first monitor 210 is A, satisfying 1.8m ≤ A ≤ 2m. The aforementioned height of the first monitor 210 is located near the highest point of the lifting stroke of the screen printing frame in this embodiment, effectively detecting common hoisting obstacles in the vicinity of the highest point of the stroke; the height is relatively reasonable. Optionally, the height A of the first monitor 210 can be selected as 1.8m, 1.85m, 1.9m, 1.95m, or 2m, or a value between any two.
[0032] In this embodiment, the second monitor 220 is a second through-beam sensor, which includes a second light emitter 221 and a second light receiver 222. The second light emitter 221 is located at the lower part of the first column 120, and the second light receiver 222 is located at the lower part of the second column 130, with the second light emitter 221 and the second light receiver 222 facing each other. The second light emitter 221 emits a second light beam, and the second light receiver 222 receives the second light beam. When a human body or a foreign object placed on the ground enters the lifting area 110 through the operating opening 150, the second light beam will be blocked, preventing the second light receiver 222 from receiving the light beam signal. At this time, the control module can determine that there is an obstacle in the lifting area 110 and control the lifting drive to stop to avoid collisions during the lifting of the screen printing frame. Optionally, the positions of the second light emitter 221 and the second light receiver 222 can be interchanged.
[0033] In this embodiment, the height of the second monitor 220 is B, satisfying 0.3m ≤ B ≤ 0.5m. The height of the second monitor 220 is positioned near the lowest point of the lifting stroke of the screen printing frame in this embodiment, effectively detecting ground obstacles and human limbs in the area near the lowest point of the stroke; the height is relatively reasonable. Optionally, the height A of the first monitor 210 can be selected as 0.3m, 0.35m, 0.4m, 0.45m, or 0.5m, or a value between any two.
[0034] In this embodiment, the screen printing machine body is further provided with a third column 140, which is adjacent to the first column 120. A side opening 160 is formed between the third column 140 and the first column 120. An operation opening 150 is located on one side of the lifting area 110 along the horizontal direction, and the side opening 160 is located on the other side of the lifting area 110 along the horizontal direction. The operation opening 150 and the side opening 160 are adjacent. The safety protection device also includes a third monitor 230, which is used to monitor the side opening 160 and is electrically connected to the control module.
[0035] The side opening 160 facilitates the maintenance of the screen printing frame. A third monitor 230 is installed at the side opening 160, which can also detect when a person enters the lifting area 110 through the side opening 160. Subsequently, the control module can control the screen printing frame to stop lifting, further improving the production safety of the screen printing machine.
[0036] In this embodiment, the third monitor 230 is a third through-beam sensor, which includes a third light emitter 231 and a third light receiver 232. The third light emitter 231 is disposed on the third column 140, and the third light receiver 232 is disposed on the first column 120, with the third light emitter 231 and the third light receiver 232 facing each other. The third light emitter 231 emits a third light beam, and the third light receiver 232 receives the third light beam. When a human body enters the lifting area 110 through the side opening 160, the third light beam will be blocked, preventing the third light receiver 232 from receiving the beam signal. At this time, the control module can determine that there is an obstacle in the lifting area 110 and can control the lifting drive to stop to avoid collisions during the lifting of the screen printing frame. Optionally, the positions of the third light emitter 231 and the third light receiver 232 can be interchanged.
[0037] In this embodiment, the screen printing frame is slidably connected to the first column 120, the second column 130, and the third column 140 in the vertical direction. The first column 120, the second column 130, and the third column 140 also serve as lifting and sliding guide columns for the screen printing frame, making the structure of the screen printing machine body relatively compact and helping to reduce equipment manufacturing costs.
[0038] In this embodiment, the screen printing frame is equipped with a stop 170, which is located at the operating opening 150. The stop 170 is horizontally opposite to the first monitor 210 or the second monitor 220. When the screen printing frame is raised or lowered to near its highest or lowest point, the stop 170 can block the light emitted by the first light emitter 211 or the second light emitter 221. This allows the control module to detect that the screen printing frame is at its travel limit, and the first monitor 210 and the second monitor 220 can also monitor the travel of the screen printing frame to prevent it from exceeding its travel limits.
[0039] In an embodiment, the first monitor 210 includes a first light transmitter 211 and a first light receiver 212, with protective shells respectively provided on the outer sides of the first light transmitter 211 and the first light receiver 212; the second monitor 220 includes a second light transmitter 221 and a second light receiver 222, with protective shells respectively provided on the outer sides of the second light transmitter 221 and the second light receiver 222; and the third monitor 230 includes a third light transmitter 231 and a third light receiver 232, with protective shells respectively provided on the outer sides of the third light transmitter 231 and the third light receiver 232, with light-transmitting ports provided on the protective shells.
[0040] Since the screen printing area may have a lot of dust, a protective shell can prevent dust from falling into the optical components of the light transmitter and receiver, thus improving monitoring stability. In addition, the protective shell can also protect the light transmitter and receiver from impact, preventing people, foreign objects or screen printing frames from directly colliding with the light transmitter and receiver.
[0041] In this embodiment, a defogging heater is installed inside the protective housing. In low-temperature environments, condensation may occur on the light emitter and receiver. Activating the defogging heater reduces condensation on the optical components, improving monitoring stability. Specifically, the defogging heater can be a heating plate or heating wire, etc.
[0042] Specifically, the control module uses a microcontroller with built-in signal amplification and filtering circuits to easily identify the signals from the first monitor 210, the second monitor 220, and the third monitor 230. The control module can stop the screen printing frame within 100ms by directly cutting off the power to the lifting driver, and will also trigger an alarm with an audible and visual warning device. The lifting driver can be, for example, a motor coupled with a lead screw, with the screen printing frame equipped with a lead screw nut.
[0043] Specifically, in some embodiments, a shock-absorbing structure is provided inside the protective housing, and the light emitter is connected to the protective housing through the shock-absorbing structure. The shock-absorbing structure can be, for example, a buffer pad or a shock-absorbing bracket.
[0044] Specifically, the control module can control the temperature of the demisting heater to prevent the heating temperature from being too high or too low.
[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.
Claims
1. A screen printing machine with a safety protection device, characterized in that, include: The screen printing machine body is provided with a lifting area (110). The screen printing machine body is provided with a first column (120) and a second column (130) on one side of the lifting area (110). The screen printing machine body is provided with a screen printing frame and a lifting driver. The screen printing frame can be lifted and is located in the lifting area (110). The lifting driver is used to drive the screen printing frame to lift and lower. An operation opening (150) is formed between the first column (120) and the second column (130). The operation opening (150) is connected to the lifting area (110). The screen printing machine body is provided with a control module. The control module is electrically connected to the lifting driver. A safety protection device is installed on the screen printing machine body. The protection device includes a first monitor (210) and a second monitor (220). The first monitor (210) is used to monitor the upper part of the operation opening (150), and the second monitor (220) is used to monitor the lower part of the operation opening (150). The first monitor (210) and the second monitor (220) are electrically connected to the control module respectively.
2. The screen printing machine with a safety protection device according to claim 1, characterized in that: The first monitor (210) is a first through-beam sensor. The first through-beam sensor includes a first light emitter (211) and a first light receiver (212). The first light emitter (211) is disposed on the upper part of the first column (120), and the first light receiver (212) is disposed on the upper part of the second column (130). The first light emitter (211) and the first light receiver (212) are opposite to each other.
3. The screen printing machine with a safety protection device according to claim 2, characterized in that: The height of the first monitor (210) is A, which satisfies 1.8m≤A≤2m.
4. The screen printing machine with a safety protection device according to claim 1, characterized in that: The second monitor (220) is a second through-beam sensor, which includes a second light emitter (221) and a second light receiver (222). The second light emitter (221) is located at the lower part of the first column (120), and the second light receiver (222) is located at the lower part of the second column (130). The second light emitter (221) and the second light receiver (222) are opposite to each other.
5. The screen printing machine with a safety protection device according to claim 1, characterized in that: The height of the second monitor (220) is B, which satisfies 0.3m≤B≤0.5m.
6. The screen printing machine with a safety protection device according to claim 1, characterized in that: The screen printing machine body is also provided with a third column (140), which is adjacent to the first column (120). A side opening (160) is formed between the third column (140) and the first column (120). The operation opening (150) is located on one side of the lifting area (110) along the horizontal direction, and the side opening (160) is located on the other side of the lifting area (110) along the horizontal direction. The operation opening (150) is adjacent to the side opening (160). The safety protection device also includes a third monitor (230), which is used to monitor the side opening (160). The third monitor (230) is electrically connected to the control module.
7. The screen printing machine with a safety protection device according to claim 6, characterized in that: The third monitor (230) is a third through-beam sensor, which includes a third light emitter (231) and a third light receiver (232). The third light emitter (231) is disposed on the third column (140), and the third light receiver (232) is disposed on the first column (120). The third light emitter (231) and the third light receiver (232) are opposite to each other.
8. The screen printing machine with a safety protection device according to claim 6, characterized in that: The screen printing frame is slidably connected to the first column (120), the second column (130) and the third column (140) in the vertical direction; the screen printing frame is provided with a stop (170), the stop (170) is located in the operation opening (150), and the stop (170) can be opposite to the first monitor (210) or the second monitor (220) in the horizontal direction.
9. The screen printing machine with a safety protection device according to claim 1, characterized in that: The first monitor (210) includes a first light transmitter (211) and a first light receiver (212), and protective shells are respectively provided on the outside of the first light transmitter (211) and the first light receiver (212). The second monitor (220) includes a second light transmitter (221) and a second light receiver (222), and protective shells are respectively provided on the outside of the second light transmitter (221) and the second light receiver (222), and the protective shells are provided with light-transmitting ports.
10. The screen printing machine with a safety protection device according to claim 9, characterized in that: The protective shell is equipped with a defogging heater.