A sheet drop alarm mechanism

Abstract

The utility model relates to a kind of sheet drop alarm mechanism, it is characterized by: including base, check swing bar, detection module, alarm and controller, the middle part or upper part of check swing bar is rotatably installed on base, detection module is installed on base and is at the side of check swing bar, the position corresponding to the part position of the rotation axis of detection module and check swing bar is deviated;Detection module and the input end of corresponding controller are electrically connected, and the output end of corresponding alarm and controller is electrically connected.This sheet drop alarm mechanism can detect whether sheet appears drop condition in real time during sheet production process, and automatically alarm when sheet appears drop, to warn staff to handle in time.

Description

Technical Field

[0001] This utility model relates to the field of sheet production equipment technology, specifically to a sheet falling alarm mechanism. Background Technology

[0002] In the continuous production process of sheet materials, the sheets are prone to breakage, shrinkage or partial shedding due to temperature fluctuations, tension imbalance or mechanical failure. If the problem is not detected and dealt with in time during the production process, it will not only cause waste of raw materials, but may also cause equipment blockage, mold damage or even batch product defects.

[0003] Chinese utility model patent CN218111434U discloses a residual sheet alarm device for a BOPS sheet multi-station forming machine, comprising: a threading roller 2, a guide roller 3, a machine drying tunnel 4, an alarm 5, a counter 6, and a length encoder 7. The threading roller has sheet 1 wound on it. The threading roller and the guide roller are arranged in parallel and are both installed on the multi-station forming machine body. After the sheet passes through the threading roller, it is guided by the guide roller and enters the machine drying tunnel. The multi-station forming machine body and the machine drying tunnel are arranged opposite each other along the sheet's forward direction. The alarm, counter, and length encoder are installed on the multi-station forming machine body. The counter is electrically connected to both the alarm and the length encoder. The length encoder is installed directly below the guide roller. After detecting the length of the sheet guided by the guide roller, the length encoder outputs a length signal to the counter. The counter counts the length signal according to its internally set unit length. When the count reaches a preset number, the counter outputs a signal to the alarm to trigger an alarm. Although this type of remaining sheet alarm device can detect the amount of remaining roll material and automatically alarm before the sheet is exhausted, it cannot detect the partial falling of sheet material during the production process and does not provide timely warning of sheet falling. Utility Model Content

[0004] The technical problem this utility model aims to solve is to provide a sheet falling alarm mechanism. This mechanism can detect whether sheets are falling in real time during sheet production and automatically sound an alarm when a sheet falls, alerting workers to take timely action. The technical solution adopted is as follows:

[0005] A sheet falling alarm mechanism is characterized by comprising a base, an inspection swing arm, a detection module, an alarm, and a controller. The middle or upper part of the inspection swing arm is rotatably mounted on the base. The detection module is mounted on the base and located on one side of the inspection swing arm. The position of the detection module corresponds to the position of the inspection swing arm that is off its rotation axis. The detection module is electrically connected to the corresponding input terminal of the controller, and the alarm is electrically connected to the corresponding output terminal of the controller.

[0006] This sheet drop alarm mechanism can be applied in sheet production equipment to detect whether the sheet conveyed by the sheet conveying mechanism (such as a tracked device) has fallen. The base can be fixedly installed on the sheet conveying mechanism (such as a tracked device), and the inspection swing arm can be set on the upper side of the sheet conveyed by the sheet conveying mechanism (such as a tracked device). During the production process of the sheet production equipment, when the sheet conveyed by the sheet conveying mechanism does not fall, the lower end of the inspection swing arm is in contact with the upper side of the sheet conveyed by the sheet conveying mechanism. At this time, the inspection swing arm is in an inclined state, and the detection module does not sense the inspection swing arm. When the sheet conveyed by the sheet conveying mechanism falls, since the lower end of the inspection swing arm is not supported by the sheet, the inspection swing arm swings around its rotation axis to an upright state under its own gravity. At this time, the detection module senses the inspection swing arm and sends a signal to the controller. The controller then controls the alarm to automatically sound, so as to alert the staff to deal with the problem in time and effectively prevent problems such as raw material waste, equipment blockage, mold damage, or batch product defects.

[0007] The aforementioned controller can be a PLC controller, a microcontroller, or a microprocessor, and it can be integrated into the control box of the sheet production equipment.

[0008] As a preferred embodiment of this utility model, the detection module adopts an inductive switch or a contact switch.

[0009] As a preferred embodiment of this invention, the lower end of the inspection lever has a smooth, arc-shaped surface. This prevents the lower end of the inspection lever from scratching the surface of the sheet when it comes into contact with the sheet.

[0010] In a preferred embodiment of this invention, the middle part of the inspection swing arm is rotatably mounted on the base, and the rotation axis of the inspection swing arm is arranged laterally. The detection module corresponds to the upper position of the inspection swing arm. This structure allows the inspection swing arm to swing freely around its middle part, enabling it to be in an inclined or upright state. When the sheet conveyed by the sheet conveying mechanism does not fall, the inspection swing arm is in an inclined state, with its upper part offset from the detection module. When the sheet conveyed by the sheet conveying mechanism falls, the inspection swing arm is in an upright state, with its upper part directly facing the detection module, triggering the detection module.

[0011] As a further preferred embodiment of this utility model, the middle part of the inspection swing arm is rotatably mounted on the base via a rotating connecting component. The rotating connecting component includes a connecting shaft and a bearing. The connecting shaft is fixedly mounted on the base and arranged laterally, and the inner ring of the bearing is fixedly mounted on the connecting shaft. The middle part of the inspection swing arm has a connecting hole, through which the inspection swing arm is sleeved on the connecting shaft and connected to the outer ring of the bearing. The detection module is located directly above the connecting shaft. The centerline of the connecting shaft is the rotation axis of the inspection swing arm. With this structure, the inspection swing arm can swing freely around the connecting shaft via the bearing, so that it is in an inclined or vertical state.

[0012] In another preferred embodiment of this utility model, the upper part of the inspection swing arm is rotatably mounted on the base, and the detection module corresponds to the middle position of the inspection swing arm. This structure allows the inspection swing arm to swing freely around its upper part, enabling it to be in an inclined or upright state. When the sheet conveyed by the sheet conveying mechanism does not fall, the inspection swing arm is in an inclined state, and the middle part of the inspection swing arm deviates from the detection module, thus not triggering the detection module. When the sheet conveyed by the sheet conveying mechanism falls, the inspection swing arm is in an upright state, and the upper part of the inspection swing arm is directly opposite the detection module, triggering the detection module.

[0013] As a further preferred embodiment of this utility model, the upper part of the inspection pendulum is rotatably mounted on the base via a rotating connecting component. The rotation axis of the inspection pendulum is arranged laterally. The rotating connecting component includes a connecting shaft and a bearing. The connecting shaft is fixedly mounted on the base and arranged laterally, and the inner ring of the bearing is fixedly mounted on the connecting shaft. The upper part of the inspection pendulum is provided with a connecting hole, through which the inspection pendulum is sleeved on the connecting shaft and connected to the outer ring of the bearing. The detection module is located directly below the connecting shaft. The centerline of the connecting shaft is the rotation axis of the inspection pendulum. With this structure, the inspection pendulum can swing freely around the connecting shaft via the bearing, so that it is in an inclined or vertical state.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] This sheet falling alarm mechanism can detect whether the sheet is falling in real time during the sheet production process and automatically alarm when the sheet falls, so as to remind the staff to deal with it in time and effectively prevent problems such as raw material waste, equipment blockage, mold damage or batch product defects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sheet falling alarm mechanism of a preferred embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A three-dimensional image.

[0018] Figure 3 yes Figure 1 The diagram shows the status of the sheet falling alarm mechanism when a sheet falls.

[0019] Figure 4 yes Figure 1 The diagram shows the internal logic block diagram of the sheet falling alarm mechanism. Detailed Implementation

[0020] like Figures 1-4 As shown, this sheet falling alarm mechanism includes a base 1, an inspection swing arm 2, a sensor switch 3, an alarm 4, and a controller 5. The middle part of the inspection swing arm 2 is rotatably mounted on the base 1, and its rotation axis is set horizontally. The sensor switch 3 is mounted on the base 1 and is located on one side of the inspection swing arm 2. The sensor switch 3 corresponds to the upper position of the inspection swing arm 2. The sensor switch 3 is electrically connected to the corresponding input terminal of the controller 5, and the alarm 4 is electrically connected to the corresponding output terminal of the controller 5.

[0021] In this embodiment, the middle part of the inspection swing arm 2 is rotatably mounted on the base 1 via a rotating connecting component 6. The rotating connecting component 6 includes a connecting shaft 61 and a bearing 62. The connecting shaft 61 is fixedly mounted on the base 1 and arranged laterally, and the inner ring of the bearing 62 is fixedly mounted on the connecting shaft 61. The middle part of the inspection swing arm 2 is provided with a connecting hole, through which the inspection swing arm 2 is sleeved on the connecting shaft 61 and connected to the outer ring of the bearing 62. The inductive switch 3 is located directly above the connecting shaft 61. With this structure, the inspection swing arm 2 can swing freely around the connecting shaft 61 via the bearing 62, so that it is in an inclined or vertical state.

[0022] In this embodiment, the lower end of the inspection lever 2 has a smooth, arc-shaped surface 202. This prevents the lower end of the inspection lever 2 from scratching the surface of the sheet 300 when it comes into contact with it.

[0023] The working principle of this sheet falling alarm mechanism is briefly described below:

[0024] This sheet falling alarm mechanism can be applied in sheet production equipment to detect whether the sheet 300 conveyed by the track device 100 has fallen. The base 1 is fixedly installed on the track 101 of the track device 100, and the inspection swing arm 2 is set on the upper side of the sheet 300 conveyed by the track device 100.

[0025] During the sheet production process, when the sheet 300 conveyed by the track chain device 100 does not fall, the lower end of the inspection swing arm 2 contacts the upper side of the sheet 300 conveyed by the track chain device 100. At this time, the inspection swing arm 2 is in an inclined state, and the upper part of the inspection swing arm 2 is deviated from the induction switch 3. The induction switch 3 does not detect the inspection swing arm 2. When the sheet 300 conveyed by the track chain device 100 falls, since the lower end of the inspection swing arm 2 is not supported by the sheet 300, the inspection swing arm 2 swings around its rotation axis to an upright state under its own gravity. At this time, the upper part of the inspection swing arm 2 is exactly facing the induction switch 3. After the induction switch 3 is triggered, it sends a signal to the controller 5. The controller 5 then controls the alarm 4 to automatically sound an alarm to alert the staff to deal with the problem in time, effectively preventing problems such as waste of raw materials, equipment blockage, mold damage, or batch product defects.

[0026] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles of this utility model patent are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, they should all fall within the protection scope of this utility model.

Claims

1. A sheet falling alarm mechanism, characterized in that: It includes a base, an inspection swing arm, a detection module, an alarm, and a controller. The middle or upper part of the inspection swing arm is rotatably mounted on the base. The detection module is mounted on the base and located on one side of the inspection swing arm. The position of the detection module corresponds to the position of the inspection swing arm that is off its axis of rotation. The detection module is electrically connected to the corresponding input terminal of the controller, and the alarm is electrically connected to the corresponding output terminal of the controller.

2. The sheet falling alarm mechanism according to claim 1, characterized in that: The detection module uses an inductive switch or a contact switch.

3. The sheet falling alarm mechanism according to claim 1, characterized in that: The lower end of the inspection lever has a smooth, arc-shaped surface.

4. A sheet falling alarm mechanism according to any one of claims 1-3, characterized in that: The middle part of the inspection pendulum is rotatably mounted on the base, the rotation axis of the inspection pendulum is set in the horizontal direction, and the detection module corresponds to the upper position of the inspection pendulum.

5. A sheet falling alarm mechanism according to claim 4, characterized in that: The middle part of the inspection swing arm is rotatably mounted on the base via a rotating connecting component. The rotating connecting component includes a connecting shaft and a bearing. The connecting shaft is fixedly mounted on the base and arranged laterally, and the inner ring of the bearing is fixedly mounted on the connecting shaft. The middle part of the inspection swing arm is provided with a connecting hole, through which the inspection swing arm is sleeved on the connecting shaft and connected to the outer ring of the bearing. The detection module is located directly above the connecting shaft.

6. A sheet falling alarm mechanism according to any one of claims 1-3, characterized in that: The upper part of the inspection pendulum is rotatably mounted on the base, and the detection module corresponds to the middle position of the inspection pendulum.

7. A sheet falling alarm mechanism according to claim 6, characterized in that: The upper part of the inspection pendulum is rotatably mounted on the base via a rotating connecting component. The rotation axis of the inspection pendulum is arranged laterally. The rotating connecting component includes a connecting shaft and a bearing. The connecting shaft is fixedly mounted on the base and is arranged laterally. The inner ring of the bearing is fixedly mounted on the connecting shaft. The upper part of the inspection pendulum is provided with a connecting hole. The inspection pendulum is sleeved on the connecting shaft through its connecting hole and connected to the outer ring of the bearing. The detection module is located directly below the connecting shaft.

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