Device for identifying front and back surfaces of steel sheet of weighing scale

Abstract

The utility model discloses a weighing scale steel sheet front and back identification device, comprising a detection conveying groove used for receiving steel sheets with uncertain front and back orientations sent by an upstream process, the tail end of the detection conveying groove is provided with a push detection assembly, and the push detection assembly determines the front and back orientations of the steel sheets through pushing the side surfaces of the steel sheets at the tail end of the detection conveying groove. A pressing assembly is further arranged above the tail end of the detection conveying groove and used for applying pressure to the lower steel sheet.

Description

TECHNICAL FIELD

[0001] The utility model relates to a recognition device for detecting body weight scale steel sheet, especially a body weight scale steel sheet front and back recognition device. BACKGROUND

[0002] The core principle of the current body weight scale weighing is to convert the human body gravity into an electric signal for measurement through a sensor, and the core element is usually a steel sheet strain sensor. When the human body stands on the scale surface, the gravity is transmitted to the steel sheet strain sensor through a mechanical structure, causing the steel sheet to deform, and the strain gauge attached to the steel sheet also produces a micro-strain, so that the resistance value of the strain gauge also changes slightly. By using multiple steel sheet strain sensors to form a Wheatstone bridge circuit, the small resistance change is converted into a differential voltage signal, which is amplified and analog-digital converted, and then the weight can be calculated by the processor.

[0003] The steel sheet strain sensor usually takes a stamped steel sheet as the main body. Due to the defects of the stamping process, there is often a certain difference in the size of the front and back of the steel sheet. If the strain gauges are not uniformly pasted on the front or back, it will cause differences in the consistency of the steel sheet strain sensor, resulting in errors in the final measurement results. In view of this situation, a notch is often provided on one side of the steel sheet during production, and the front and back of the steel sheet are judged and selected by a diffuse reflection photoelectric sensor on the assembly line. However, the steel sheet often needs to be electroplated on the surface during production, which will cause the diffuse reflection photoelectric sensor to easily misjudge and cause errors.

[0004] Therefore, how to overcome the above-mentioned defects to accurately identify the front and back of the steel sheet has become an important issue for technicians in the field to solve. INVENTION CONTENTS

[0005] The utility model overcomes the above-mentioned technical defects and provides a body weight scale steel sheet front and back recognition device.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A body weight scale steel sheet front and back recognition device, comprising a detection conveying groove 2 for receiving the steel sheet 1 with uncertain front and back orientation sent by the upstream process, a push detection assembly 3 is arranged at the end of the detection conveying groove 2, the push detection assembly 3 judges the front and back orientation of the steel sheet 1 at the end of the detection conveying groove 2 by pushing the side of the steel sheet 1, and a pressing assembly 4 is further arranged above the end of the detection conveying groove 2, the pressing assembly 4 is used to apply pressure to the steel sheet 1 below.

[0008] Preferably, the pushing and pressing detection assembly 3 comprises a first sliding table 31 capable of approaching / leaving the detection conveying groove 2 in a direction perpendicular to the extension direction of the detection conveying groove 2, the end of the first sliding table 31 approaching the detection conveying groove 2 is provided with an extension rod 32 capable of being inserted into the detection conveying groove 2, the front end of the extension rod 32 is provided with a pointed end 321, the bottom surface of the pointed end 321 is flush with the bottom surface of the detection conveying groove 2, and the top surface gradually rises from the head to the direction of the first sliding table 31, when the steel sheet 1 moving to the end of the detection conveying groove 2 has the front surface downward, the pointed end 321 can be inserted into the bottom of the steel sheet 1 along the collapsed corner area 11 of the steel sheet 1 when the first sliding table 31 approaches the detection conveying groove 2, and when the steel sheet 1 moving to the end of the detection conveying groove 2 has the back surface downward, the pointed end 321 cannot be inserted into the bottom of the steel sheet 1, the pushing and pressing detection assembly 3 further comprises a first photoelectric sensor 33 for detecting whether the first sliding table 31 moves to the position, and the first sliding table 31 cannot move to the position to trigger the first photoelectric sensor 33 when the pointed end 321 cannot be inserted into the bottom of the steel sheet 1.

[0009] Preferably, the pushing and pressing detection assembly 3 further comprises a guide rail 34 arranged at the side of the end of the detection conveying groove 2 and extending transversely and perpendicularly to the detection conveying groove 2, the first sliding table 31 is movably connected to the guide rail 34 and moves transversely, a second sliding table 35 capable of moving transversely is further movably connected to the guide rail 34, the first sliding table 31 is located between the second sliding table 35 and the detection conveying groove 2, a first compression spring 36 is connected between the first sliding table 31 and the second sliding table 35, a limiting movable connecting rod 37 is further connected between the first sliding table 31 and the second sliding table 35 so that the two sliding tables can approach / leave each other within a certain range, one end of the limiting movable connecting rod 37 is fixed on the first sliding table 31, and the other end is movably connected to the second sliding table 35 and can move transversely relative to the second sliding table 35, the pushing and pressing detection assembly 3 further comprises a first electric push rod 38 connected with the second sliding table 35 and used for driving the second sliding table 35 to move transversely along the guide rail 34, and the first photoelectric sensor 33 is fixed on the guide rail 34.

[0010] Preferably, the guide rail 34 is further fixed with a second photoelectric sensor 39 for detecting whether the second sliding table 35 moves to the specified position.

[0011] Preferably, the pressing assembly 4 comprises a third sliding table 41 capable of moving up and down above the end of the detection conveying groove 2, a first pressing arm 42 extending downward is connected to the third sliding table 41, a first roller 43 capable of rolling with the steel sheet 1 below is rotatably connected to the first pressing arm 42, and a second compression spring 44 for providing a downward pressure to the third sliding table 41 is connected to the top end of the third sliding table 41.

[0012] Compared with the prior art, the pushing and pressing detection assembly 3 has the following beneficial effects:

[0013] The identification device can avoid the problem of traditional detection scheme affecting the diffuse reflection detection result after the steel sheet is electroplated, and since the device is used to push and detect the front and back surfaces by using the characteristics of the stamping forming of the steel sheet, it is not necessary to specially set a groove on the steel sheet for detection, so that the detection efficiency can be greatly improved and the production cost increased by setting the groove can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the identification device of the present application.

[0015] Figure 2 is a sectional view of the end of the detection conveying groove, in which the steel sheet is in a state of the front surface upward.

[0016] Figure 3 is an enlarged schematic view of the tip of the extension rod, in which the steel sheet is in a state of the front surface upward.

[0017] Figure 4 is an enlarged schematic view of the tip of the extension rod, in which the steel sheet is in a state of the back surface upward.

[0018] Figure 5 is a schematic view of the steel sheet, in which the left steel sheet is in a state of the back surface upward and the right steel sheet is in a state of the front surface upward. DETAILED DESCRIPTION

[0019] The features of the present application and other related features are further described in detail by the following examples for the understanding of the skilled in the art:

[0020] As shown in Figures 1 to 5 , a front and back surface identification device for steel sheet of a body weight scale is used to receive the detection conveying groove 2 of the steel sheet 1 with uncertain front and back surface orientation sent by the upstream process, a push and detection assembly 3 is arranged at the end of the detection conveying groove 2, the push and detection assembly 3 is used to judge the front and back surface orientation of the steel sheet 1 at the end of the detection conveying groove 2 by pushing and detecting the side surface of the steel sheet 1, a pressing assembly 4 is further arranged above the end of the detection conveying groove 2, and the pressing assembly 4 is used to apply pressure to the steel sheet 1 below.

[0021] The steel sheet 1 formed by stamping has a collapsed corner area 11 at the edge of the front surface due to the characteristics of the stamping process, and the collapsed corner area 11 generally presents as an arc surface at the edge of the front surface.

[0022] The front and back identification device of the case includes a pushing detection assembly 3 and a pressing assembly 4 arranged at the end of the detection conveying groove 2, wherein the pushing detection assembly 3 can determine the front and back direction of the steel sheet 1 by pushing the side of the steel sheet 1 according to the feature that the front of the steel sheet 1 will generate a collapsed corner area 11, so that the detection result will not be affected by the surface treatment process of the steel sheet 1, and the accurate orientation information of the steel sheet 1 can be obtained for the subsequent process to facilitate targeted processing and ensure the consistency of the final product. In addition, the pressing assembly 4 arranged in the detection conveying groove 2 can apply pressure to the steel sheet 1 to avoid the steel sheet 1 from being separated from the detection conveying groove 2 when the pushing detection assembly 3 pushes the steel sheet 1.

[0023] As described above, using the identification device of the case can avoid the problem of affecting the diffuse reflection detection result of the traditional detection scheme after the steel sheet 1 is electroplated, and since the case utilizes the feature of the steel sheet 1 being punched to determine the front and back, it is not necessary to specially arrange a groove on the steel sheet 1 for detection, which can greatly improve the detection efficiency and reduce the production cost increased by arranging the groove.

[0024] As shown in Figures 1 to 5 Preferably, the pushing detection assembly 3 includes a first sliding table 31 capable of approaching / away from the detection conveying groove 2 in a direction perpendicular to the extension direction of the detection conveying groove 2, the end of the first sliding table 31 approaching the detection conveying groove 2 is provided with an extension rod 32 capable of being inserted into the detection conveying groove 2, the front end of the extension rod 32 is provided with a pointed end 321, the bottom surface of the pointed end 321 is in contact with the bottom surface of the detection conveying groove 2, and the top surface gradually rises from the head to the direction of the first sliding table 31, when the front of the steel sheet 1 moving to the end of the detection conveying groove 2 is downward, the pointed end 321 can be inserted into the bottom of the steel sheet 1 along the collapsed corner area 11 of the steel sheet 1 when the first sliding table 31 approaches the detection conveying groove 2, and when the back of the steel sheet 1 moving to the end of the detection conveying groove 2 is downward, the pointed end 321 cannot be inserted into the bottom of the steel sheet 1, the pushing detection assembly 3 further includes a first photoelectric sensor 33 for detecting whether the first sliding table 31 is moved to the position, and the first sliding table 31 cannot be moved to the position to trigger the first photoelectric sensor 33 when the pointed end 321 cannot be inserted into the bottom of the steel sheet 1.

[0025] As described above, when the push-and-detection assembly 3 detects the steel sheet 1, it first controls the first slide 31 to move towards the detection conveying groove 2. This allows the first slide 31 to drive the extension rod 32 to push the side of the steel sheet 1. If the steel sheet 1 is facing upwards (i.e., the collapsed corner area 11 is on the upper surface), the tip 321 cannot penetrate the bottom of the steel sheet 1 through the collapsed corner area 11, thus obstructing the movement of the first slide 31 and preventing it from triggering the first photoelectric sensor 33. However, if the steel sheet 1 is facing downwards (i.e., the collapsed corner area 11 is on the lower surface), the tip 321 can penetrate the bottom of the steel sheet 1 through the collapsed corner area 11, and the first slide 31 can then move to the position to trigger the first photoelectric sensor 33. Therefore, the orientation of the steel sheet 1 can be determined based on the triggering status of the first photoelectric sensor 33.

[0026] like Figures 1 to 5 As shown, preferably, the push detection assembly 3 further includes a guide rail 34 extending laterally perpendicular to the end side of the detection conveying groove 2. The first slide 31 is movably connected to the guide rail 34 and moves laterally. A second slide 35, which can move laterally, is also movably connected to the guide rail 34. The first slide 31 is located between the second slide 35 and the detection conveying groove 2. A first compression spring 36 is connected between the first slide 31 and the second slide 35. A limiting movable link 37 is also connected between the first slide 31 and the second slide 35 so that the two slides can move closer to each other / away from each other within a certain range. One end of the limiting movable link 37 is fixed to the first slide 31, and the other end is movably connected to the second slide 35 and can move laterally relative to the second slide 35. The push detection assembly 3 further includes a first electric push rod 38 connected to the second slide 35 for driving the second slide 35 to move laterally along the guide rail 34. The first photoelectric sensor 33 is fixed on the guide rail 34.

[0027] As described above, the first slide 31 and the second slide 35 are both connected to the guide rail 34 and move coaxially. When the push detection assembly 3 performs detection, the first electric push rod 38 first drives the second slide 35 to move towards the detection conveying groove 2. Since a first compression spring 36 is connected between the first slide 31 and the second slide 35, the first slide 31 can also move towards the detection conveying groove 2 under the push of the first compression spring 36. Thus, the first compression spring 36 between the first slide 31 and the second slide 35 can form a buffer area, allowing the tip 321 to flexibly push the steel sheet 1, thereby avoiding hard contact between the tip 321 and the steel sheet 1 and damage to the steel sheet 1. After the detection is completed, when the first electric push rod 38 drives the second slide 35 to retract, the second slide 35 can also use the limiting movable connecting rod 37 to pull the first slide 31 away from the detection conveying groove 2.

[0028] Specifically, the relative distance between the first slide 31 and the second slide 35 is greatest when the first compression spring 36 is not compressed, and the relative distance between the first slide 31 and the second slide 35 is closest when the first compression spring 36 is compressed to its limit.

[0029] like Figures 1 to 2 As shown, preferably, a second photoelectric sensor 39 is also fixed on the guide rail 34 to detect whether the second slide 35 has moved to a designated position. When the second slide 35 moves to the designated position, the second photoelectric sensor 39 will be triggered. Based on the signal from the second photoelectric sensor 39, the first electric push rod 38 can be precisely controlled to stop driving the second slide 35 to move in a timely manner. At the same time, it can also ensure that the second slide 35 can stop at the same position every time it is detected, and ensure that the first compression spring 36 can apply a constant thrust to the first slide 31 during detection to push the steel sheet 1 to ensure the consistency of detection.

[0030] like Figures 1 to 4 As shown, preferably, the clamping assembly 4 includes a third slide 41 that is movable up and down and is positioned above the end of the detection conveying groove 2. A first clamping arm 42 extending downward is connected to the third slide 41. A first roller 43 is rotatably connected to the first clamping arm 42 to facilitate rolling contact with the steel sheet 1 below. A second compression spring 44 is connected to the top of the third slide 41 to provide downward pressure. In this way, the first roller 43 can clamp the steel sheet 1 under the combined action of the gravity of the third slide 41 and the second compression spring 44 to prevent the steel sheet 1 from falling out of the detection conveying groove 2. At the same time, when the detection assembly 3 pushes the steel sheet 1 to detect it, the roller 43 adaptively lifts and maintains the clamping position to avoid damaging the steel sheet 1. In addition, the rolling contact between the first roller 43 and the steel sheet 1 can reduce friction and does not affect the conveying of the steel sheet 1.

[0031] As stated above, this case protects a device for identifying the front and back of a steel plate on a weighing scale. All technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A device for identifying the front and back of a steel plate on a weighing scale, characterized in that... The device includes a detection conveying trough (2) for receiving steel sheets (1) with uncertain front and back orientations from upstream processes. A push detection component (3) is provided at the end of the detection conveying trough (2). The push detection component (3) determines the front and back orientation of the steel sheet (1) by pushing the side of the steel sheet (1) at the end of the detection conveying trough (2). A pressing component (4) is also provided above the end of the detection conveying trough (2). The pressing component (4) is used to apply pressure to the steel sheet (1) below.

2. The device for identifying the front and back sides of a steel plate on a weighing scale according to claim 1, characterized in that... The push-test assembly (3) includes a first slide (31) that can move closer to / away from the test conveying groove (2) in a direction perpendicular to the test conveying groove (2). The end of the first slide (31) closer to the test conveying groove (2) is provided with an extension rod (32) that can be inserted into the test conveying groove (2). The front end of the extension rod (32) is provided with a tip (321). The bottom surface of the tip (321) is in contact with the bottom surface of the test conveying groove (2), and the top surface gradually rises from the head towards the first slide (31). When the steel plate (1) moves to the end of the test conveying groove (2), the front face is downward. When the tip (321) moves close to the detection conveying groove (2) along the collapsed corner area (11) of the steel sheet (1), it can be inserted into the bottom of the steel sheet (1). When the steel sheet (1) at the end of the detection conveying groove (2) is facing down, the tip (321) cannot be inserted into the bottom of the steel sheet (1). The push detection assembly (3) also includes a first photoelectric sensor (33) for detecting whether the first slide (31) has moved into place. When the tip (321) cannot be inserted into the bottom of the steel sheet (1), the first slide (31) cannot move into place and triggers the first photoelectric sensor (33).

3. The device for identifying the front and back sides of a steel plate on a weighing scale according to claim 2, characterized in that... The push detection assembly (3) further includes a guide rail (34) extending laterally perpendicular to the end side of the detection conveying groove (2). The first slide (31) is movably connected to the guide rail (34) and moves laterally. A second slide (35) capable of lateral movement is also movably connected to the guide rail (34). The first slide (31) is located between the second slide (35) and the detection conveying groove (2). A first compression spring (36) is connected between the first slide (31) and the second slide (35). A limiting movable link (37) is also connected between the slides (35) so that the two slides can move closer to each other within a certain range. One end of the limiting movable link (37) is fixed on the first slide (31), and the other end is limited and movablely connected to the second slide (35) so that it can move laterally relative to the second slide (35). The push detection assembly (3) also includes a first electric push rod (38) connected to the second slide (35) for driving the second slide (35) to move laterally along the guide rail (34). The first photoelectric sensor (33) is fixed on the guide rail (34).

4. The device for identifying the front and back sides of a steel plate on a weighing scale according to claim 3, characterized in that... A second photoelectric sensor (39) is also fixed on the guide rail (34) for detecting whether the second slide (35) has moved to the designated position.

5. A device for identifying the front and back sides of a steel plate on a weighing scale according to claim 2, characterized in that... The clamping assembly (4) includes a third slide (41) that is movable up and down above the end of the detection conveying groove (2). A first clamping arm (42) extending downward is connected to the third slide (41). A first roller (43) is rotatably connected to the first clamping arm (42) to facilitate rolling contact with the steel sheet (1) below. A second compression spring (44) for providing downward pressure to the third slide (41) is connected to the top of the third slide (41).

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