A quality inspection device for measuring instrument equipment

Abstract

The invention discloses a quality inspection device for measuring instruments and equipment, and relates to the technical field of material stacking and separation, comprising a frame, wherein a fixing mechanism, a traction mechanism, and a supporting mechanism are arranged on the frame, a downward pressure limiting mechanism is arranged on the supporting mechanism and the frame, and a distance measuring mechanism is arranged on the traction mechanism. The invention uses the traction mechanism to pull the ruler of the measuring tape out of the inside of the measuring tape, and uses the supporting mechanism and the downward pressure limiting mechanism to support and limit the ruler, thereby ensuring that the ruler is sufficiently supported and limited during the extension process, thereby avoiding the problem that the ruler is twisted when passing through the distance measuring mechanism for detection and affecting the detection accuracy, and in the process of the ruler being recovered into the measuring tape, the supporting mechanism and the downward pressure limiting mechanism release the support and limitation of the ruler in sections, thereby avoiding the problem that the ruler swings arbitrarily during the recovery and causes damage to the equipment and personnel, and avoiding the problem that the ruler is stuck in the structural gap in the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of quality detection, and in particular to a quality detection device for measuring instrument equipment. Background Art

[0002] Measuring instruments are widely used equipment and tools in various industries. Their accuracy needs to meet the different requirements of various industries. Whether the test results of measuring instruments are prepared will affect product quality and performance. Therefore, quality inspection of measuring instruments is a very important matter. Tape measure is one of the commonly used length measuring instruments.

[0003] In the prior art, when quality inspection of a measuring tape is performed, the measuring tape is generally directly pulled out by the measuring tape's strip to be stretched or inspected for accuracy. For example, the invention patent with patent announcement number CN117516309A discloses a quality inspection device and a method of use of a measuring instrument, wherein the sliding of an adjustment plate causes the electromagnet to slide and compress the electromagnet spring after moving to contact the adjustment plate, and then the electromagnet slides downward along the adjustment plate along with the movement of the chain. The electromagnet slides downward along the adjustment plate to achieve adsorption of the strip hook. However, when inspecting the measuring tape in this manner, there is a lack of restriction on the measuring tape's strip, especially for steel measuring tapes. Since the measuring tape's strip is made of metal, its long length when extended can easily lead to torsion of the strip, affecting the measurement result. When the strip is rolled up, it will swing irregularly to the sides under the elastic force of the internal strip spring, which can easily lead to injuries to surrounding personnel and damage to equipment, and can easily lead to the strip getting stuck in the structural gap inside the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a quality detection device for measuring instruments and equipment, which solves the technical problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] A quality inspection device for measuring instruments and equipment, comprising a frame, the frame being provided with a fixing mechanism for fixing a tape measure, a traction mechanism for pulling a tape measure to move, and a supporting mechanism for supporting an outer arc surface of the tape measure, the supporting mechanism and the frame being provided with a downward pressing limit mechanism for pressing down an inner arc surface of the tape measure when the tape measure extends, and the traction mechanism being provided with a distance measuring mechanism for measuring an extension distance of the tape measure;

[0007] The traction mechanism pulls the hook of the tape measure to move by magnetic force, and after the tape measure extends out from the inside of the tape measure, the support mechanism supports it in sections, and the downward pressure limiting mechanism presses the tape measure downward in sections.

[0008] As a preferred scheme of the present invention, the fixing mechanism includes a fixed base plate arranged on a frame, a bidirectional motion device is arranged on the fixed base plate, the bidirectional motion device is provided with two clamping plates slidably connected to the fixed base plate, a linear pushing device is arranged on the side wall opposite to the other clamping plate of one of the clamping plates, the linear pushing device is provided with an arc-shaped pressure seat slidably connected to the clamping plate, a positioning plate slidably connected to the ends of the two clamping plates is arranged on the frame, and in the horizontal and vertical directions, the spacing between the positioning plate and the fixed base plate is greater than zero and is perpendicular to the fixed base plate, the bottom height of the positioning plate is greater than the top height of the fixed base plate, the inner arc surface on the arc-shaped pressure seat abuts against the arc-shaped outer wall of the tape measure, and is used to push the tape measure to abut against the positioning plate.

[0009] As a preferred solution of the present invention, an arc-shaped elastic pad is provided on the inner arc surface of the arc-shaped pressure seat, and the thickness of the arc-shaped elastic pad gradually increases from the middle to both sides.

[0010] As a preferred solution of the present invention, the traction mechanism includes a traction base arranged on a frame, a vertical plate is vertically arranged on the traction base, the vertical plate and the positioning plate are jointly provided with a linear moving device that moves along the direction in which the tape measure strip extends, a mounting plate is arranged on the linear moving device, and a first electromagnet for adsorbing the hook of the tape measure is arranged on one side of the mounting plate.

[0011] As a preferred solution of the present invention, the support mechanism includes two support plates and two connecting plates vertically arranged on one side of the fixed base plate, and the two support plates are located between the two connecting plates, and each of the support plates is slidably connected with a plurality of support members at equal intervals along the moving direction of the linear moving device, and each of the connecting plates is provided with second electromagnets corresponding to the plurality of support members on the corresponding support plates;

[0012] Among them, when the ruler bar does not pass, the second electromagnet fixes the support member through magnetic attraction, and the support member undergoes elastic deformation. After the ruler bar passes, the second electromagnet is powered off, and the corresponding two support members are reset and offset by elastic force.

[0013] As a preferred solution of the present invention, the support member includes a sliding column inserted on the support plate for sliding along a direction perpendicular to the movement of the linear moving device, and a magnetic plate for mutual attraction with the second electromagnet is arranged on one end of the sliding column facing the second electromagnet, and an arc-shaped support seat for supporting the ruler is arranged on the other end of the sliding column, and the arc-shaped support seat and the magnetic plate are respectively located on both sides of the support plate, and a first spring is slidingly sleeved on the sliding column, and one end of the first spring is abutted against the support plate, and the other end of the first spring is abutted against the arc-shaped support seat.

[0014] As a preferred solution of the present invention, the downward pressure limiting mechanism includes two groups of brackets arranged on the frame and a reset plate vertically arranged on the fixed bottom plate, each group of the brackets is provided with a downward pressure member that can be magnetically connected and fixed to the mounting plate, the mounting plate and the positioning plate are jointly provided with a cross plate, and a plurality of limit members for pressing down the ruler strip are arranged at equal intervals on the cross plate along the extending direction of the ruler strip, and the two downward pressure members are used to press down the plurality of limit members in sequence and synchronously, the limit members can undergo elastic deformation when under pressure, and the reset plate is provided with two elastic ropes respectively connected to the two downward pressure members.

[0015] As a preferred solution of the present invention, the pressing member includes a pressing strip slidably arranged on a group of brackets and a third electromagnet arranged on the mounting plate, and the elastic rope is connected to the pressing strip, and a magnetic block and a pressing slope are arranged on the end of the pressing strip facing the mounting plate, and the magnetic block is located on the upper side of the end of the pressing strip, and the pressing slope is located on the lower side of the end of the pressing strip, and the positioning plate is provided with a through groove for the passing of the pressing strip, and the magnetic block is located between the positioning plate and the mounting plate, and is larger than the size of the through groove.

[0016] As a preferred solution of the present invention, the limiter comprises a sliding seat slidably inserted on the horizontal plate in the vertical direction, a sliding groove is provided at the bottom of the sliding seat, a connecting column is slidably connected to the sliding groove through a second spring, an arc seat for pressing down the inner arc surface on the ruler strip is provided at the bottom of the connecting column, a longitudinal plate perpendicular to the horizontal plate is provided at the top of the sliding seat, and the longitudinal plate and the arc seat are respectively located on both sides of the horizontal plate, and both sides of the top of the longitudinal plate are provided with inclined panels for contacting the downward pressing inclined surface, a third spring is provided on the sliding seat, and one end of the third spring is against the horizontal plate, and the other end of the third spring is against the longitudinal plate;

[0017] The installation plate is provided with a passage through which the limiting member passes.

[0018] As a preferred solution of the present invention, the distance measuring mechanism includes a plurality of distance measuring sensors arranged on the mounting plate, and the distance measuring sensors are used to measure the distance between themselves and the positioning plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention uses a traction mechanism to pull the ruler of the measuring tape out from the inside of the measuring tape, and uses a supporting mechanism and a downward-pressing limiting mechanism to support and limit the ruler, thereby ensuring that the ruler is sufficiently supported and limited during the extension process, thereby avoiding the problem of the ruler twisting during detection by the distance measuring mechanism and affecting the detection accuracy. In the process of the ruler being retracted into the measuring tape, the supporting mechanism and the downward-pressing limiting mechanism release the support and limitation for the ruler in stages, thereby avoiding the problem of the ruler swinging arbitrarily during retraction and causing damage to equipment and personnel, and avoiding the problem of the ruler being stuck in the structural gap in the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 An overall structural diagram of a quality inspection device for a measuring instrument from a first perspective is provided for an embodiment of the present invention;

[0023] Figure 2 An overall structural diagram of a quality inspection device for a measuring instrument from a second viewing angle is provided for an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional structure diagram of a quality inspection device of a measuring instrument from a first viewing angle is provided for an embodiment of the present invention;

[0025] Figure 4 A schematic cross-sectional structure diagram of a quality inspection device of a measuring instrument from a second viewing angle is provided for an embodiment of the present invention;

[0026] Figure 5 A schematic cross-sectional structure diagram of a quality inspection device of a measuring instrument from a third viewing angle is provided for an embodiment of the present invention;

[0027] Figure 6 Provided for embodiments of the present invention Figure 3 A schematic diagram of the structure enlargement of part A shown in FIG.

[0028] Figure 7 Provided for embodiments of the present invention Figure 5 The enlarged schematic diagram of the structure of part B shown in FIG.

[0029] Figure 8 Provided for embodiments of the present invention Figure 2 An enlarged schematic diagram of the structure of part C is shown in FIG.

[0030] The numbers in the figure represent the following:

[0031] 1. Frame; 2. Fixing mechanism; 3. Traction mechanism; 4. Support mechanism; 5. Downward pressure limit mechanism; 6. Distance measuring mechanism;

[0032] 201, fixed base plate; 202, two-way motion device; 203, clamping plate; 204, linear push device; 205, arc-shaped pressure seat; 206, positioning plate; 207, arc-shaped elastic pad; 301, traction base; 302, vertical plate; 303, linear motion device; 304, mounting plate; 305, first electromagnet; 401, support plate; 402, connecting plate; 403, support member; 404, second electromagnet; 405, sliding column; 406, magnetic plate; 407, arc-shaped support seat ; 408, first spring; 501, bracket; 502, reset plate; 503, pressing member; 504, horizontal plate; 505, limit member; 506, pressing strip; 507, third electromagnet; 508, magnetic block; 509, pressing slope; 510, through groove; 511, sliding seat; 512, slide groove; 513, second spring; 514, connecting column; 515, arc seat; 516, longitudinal plate; 517, inclined panel; 518, third spring; 519, elastic rope; 520, channel. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 8 As shown, the present invention provides a quality inspection device for measuring instruments and equipment, including a frame 1, on which a fixing mechanism 2 for fixing a tape measure, a traction mechanism 3 for pulling a tape measure to move, and a supporting mechanism 4 for supporting an outer arc surface of the tape measure are arranged, and a downward pressing limiting mechanism 5 for pressing down an inner arc surface of the tape measure when the tape measure is extended is arranged on the supporting mechanism 4 and the frame 1, and a distance measuring mechanism 6 for measuring an extended distance of the tape measure is arranged on the traction mechanism 3.

[0035] The traction mechanism 3 uses magnetic force to pull the hook of the tape measure to move, and after the tape measure extends out from the inside of the tape measure, the support mechanism 4 supports it in sections, and the downward pressure limiting mechanism 5 presses the tape measure downward in sections.

[0036] When the technical solution of the present application is actually implemented, the measuring tape is placed on the fixing mechanism 2 and fixed by the fixing mechanism 2, and then the traction mechanism 3 contacts the ruler hook to pull the ruler bar out of the measuring tape. During the extension of the ruler bar, after the ruler hook passes through the corresponding segmented areas on the supporting mechanism 4 and the downward pressure limiting mechanism 5, the supporting mechanism 4 and the downward pressure limiting mechanism 5 successively support and press down the ruler bar in segments, thereby limiting the twisting of the ruler bar during the extension process, ensuring the accuracy of the detection result of the distance measuring mechanism 6, and at the same time, it can also be directly released to detect the telescopic performance of the measuring tape.

[0037] After the traction mechanism 3 releases the ruler hook, the parts of the support mechanism 4 and the downward pressure limiting mechanism 5 that are in contact with the ruler strip are separated from the ruler strip in turn, so that when the ruler strip is retracted into the tape measure, it is also restricted by the support mechanism 4 and the downward pressure limiting mechanism 5 on the lower surface (outer arc surface) and upper surface (inner arc surface) of the ruler strip, thereby avoiding the problem that the ruler strip is prone to swinging around during the winding process and causing damage to equipment and personnel, and avoiding the problem that the ruler strip is stuck in the structural gap inside the equipment during the swinging process.

[0038] The tape measure in this embodiment is a steel tape measure, the cross section of which is arc-shaped, so it has an outer arc surface and an inner arc surface.

[0039] The fixing mechanism 2 includes a fixed base plate 201 arranged on the frame 1, a bidirectional motion device 202 is arranged on the fixed base plate 201, and the bidirectional motion device 202 is provided with two clamping plates 203 slidably connected to the fixed base plate 201, a linear pushing device 204 is arranged on the side wall opposite to one clamping plate 203 and the other clamping plate 203, and the linear pushing device 204 is provided with an arc-shaped pressure seat 205 slidably connected to the clamping plate 203, and a positioning plate 206 slidably connected to the ends of the two clamping plates 203 is arranged on the frame 1, and in the horizontal direction and the vertical direction, the spacing between the positioning plate 206 and the fixed base plate 201 is greater than zero, and is perpendicular to the fixed base plate 201, the bottom height of the positioning plate 206 is greater than the top height of the fixed base plate 201, and the inner arc surface on the arc-shaped pressure seat 205 abuts against the arc-shaped outer wall of the tape measure and is used to push the tape measure to abut against the positioning plate 206.

[0040] Place the tape measure on the area between the two clamping plates 203 on the fixed base plate 201, with the extending direction of the tape measure hook facing the positioning plate 206 and the right-angled end of the tape measure hook facing downward. The outer wall on one side of the tape measure where the strip extends is generally flat and parallel to the extending direction of the strip. When placing the tape measure, place this surface facing the fixed base plate 201 so that this surface fits against the fixed base plate 201, thereby ensuring the stability of the tape measure when initially placed.

[0041] Then, the linear pushing device 204 drives the arc pressure seat 205 to move until it is against the measuring tape. The outer wall of the measuring tape is generally arc-shaped except for the side where the scale bar extends. Therefore, the arc pressure seat 205 can fit the outer wall of the measuring tape to a large extent. The arc pressure seat 205 contacts the top of the measuring tape and the side away from the positioning plate 206. Therefore, after the arc pressure seat 205 contacts the measuring tape, it can push the measuring tape to move in the direction of the positioning plate 206 until the measuring tape is against the positioning plate 206. Due to the restriction of the two clamping plates 203, the measuring tape will not rotate on the fixed base plate 201, ensuring that the hook of the measuring tape is always facing the positioning plate 206.

[0042] Then the two-way motion device 202 drives the two clamps 203 to move towards each other simultaneously until the two sides of the tape measure abut against each other, thereby fixing the tape measure, and the top of the tape measure is squeezed by the arc-shaped pressure seat 205, and the tape measure will not rotate in a direction perpendicular to the fixed base plate 201, and the tape measure is fixed at this time.

[0043] Moreover, the spacing between the positioning plate 206 and the fixed base plate 201 in the horizontal and vertical directions is greater than zero, and the positioning plate 206 is slidably connected to the ends of the two clamping plates 203, that is, the ends of the two clamping plates 203 extend out of the fixed base plate 201 for a distance in the horizontal direction, so that the hook of the tape measure is in a suspended state, avoiding the end of the hook from abutting against the upper surface of the fixed base plate 201, reducing the friction resistance when the traction mechanism 3 pulls the hook to move, and the height of the positioning plate 206 is higher than the fixed base plate 201, so that the tape measure can pass under the positioning plate 206 and extend out for detection.

[0044] In this embodiment, the bidirectional motion device 202 and the linear push device 204 are both existing technologies. For example, the bidirectional motion device 202 is a bidirectional screw driven by a motor, and the linear push device 204 is a unidirectional screw driven by a motor, etc. The technical principles will not be elaborated on here.

[0045] An arc-shaped elastic pad 207 is provided on the inner arc surface of the arc-shaped pressure seat 205, and the thickness of the arc-shaped elastic pad 207 gradually increases from the middle to both sides.

[0046] By providing the arc-shaped elastic pad 207, it can further fit with the outer wall of the tape measure, so that the position of the tape measure can be better restricted and fixed, and the thickness of the arc-shaped elastic pad in the middle is thinner, so that the top and side walls of the tape measure can be subjected to more squeezing force, further improving the fixing effect of the tape measure.

[0047] The traction mechanism 3 includes a traction base 301 arranged on the frame 1, and a vertical plate 302 is vertically arranged on the traction base 301. The vertical plate 302 and the positioning plate 206 are jointly provided with a linear moving device 303 that moves along the direction in which the tape measure extends. A mounting plate 304 is arranged on the linear moving device 303, and a first electromagnet 305 for adsorbing the hook of the tape measure is arranged on one side of the mounting plate 304.

[0048] The linear moving device 303 drives the mounting plate 304 to move until the first electromagnet 305 contacts the ruler hook, and then the first electromagnet 305 is energized to adsorb and fix the ruler hook. Then the linear moving device 303 drives the mounting plate 304 to move in the opposite direction, so that the first electromagnet 305 drives the ruler hook to move synchronously, thereby pulling the ruler bar of the tape measure from the inside of the tape measure to the outside.

[0049] The supporting mechanism 4 includes two supporting plates 401 and two connecting plates 402 vertically arranged on one side of the fixed base plate 201, and the two supporting plates 401 are located between the two connecting plates 402. Each supporting plate 401 is slidably connected with multiple supporting members 403 at equal intervals along the movement direction of the linear moving device 303, and each connecting plate 402 is provided with a second electromagnet 404 corresponding to the multiple supporting members 403 on the corresponding supporting plate 401.

[0050] Among them, when the ruler does not pass, the second electromagnet 404 fixes the support member 403 through magnetic attraction, and the support member 403 undergoes elastic deformation. After the ruler passes, the second electromagnet 404 is powered off, and the corresponding two support members 403 are reset and offset by elastic force.

[0051] During the process of the first electromagnet 305 pulling the ruler hook to drive the ruler bar to move, when the ruler hook passes through the support member 403 at the corresponding position, the second electromagnet 404 is powered off, and the corresponding support members 403 on the two support plates 401 move toward each other under the action of elastic force until they are in contact with each other, and contact with the lower surface (outer arc surface) of the ruler bar, thereby supporting the ruler bar, and cooperating with the downward limit mechanism 5 to limit the twisting of the ruler bar when it is extended, and prevent the ruler bar from causing damage to equipment and personnel and getting stuck in the structural gap of the equipment when it is rolled up.

[0052] The support member 403 includes a sliding column 405 which is slidably inserted on the support plate 401 along a direction perpendicular to the movement of the linear moving device 303, and a magnetic plate 406 for mutual attraction with the second electromagnet 404 is arranged on one end of the sliding column 405 facing the second electromagnet 404, and an arc-shaped support seat 407 for supporting the ruler is arranged on the other end of the sliding column 405, and the arc-shaped support seat 407 and the magnetic plate 406 are respectively located on both sides of the support plate 401, and a first spring 408 is slidably sleeved on the sliding column 405, and one end of the first spring 408 is against the support plate 401, and the other end of the first spring 408 is against the arc-shaped support seat 407.

[0053] When the ruler hook does not pass, the second electromagnet 404 is energized, and the magnetic attraction plate 406 is fixed on the second electromagnet 404 by the magnetic force of the second electromagnet 404, and the two arc-shaped support seats 407 on the two support plates 401 are away from each other, so that the ruler hook, the ruler bar and the first electromagnet 305 can pass.

[0054] When the ruler hook passes between the two arc-shaped support seats 407 at the corresponding position, the corresponding two second electromagnets 404 are powered off. Under the elastic force of the first spring 408, the two opposite arc-shaped support seats 407 move toward each other until they are against each other. The sliding column 405 slides on the support plate 401 and drives the magnetic attraction plate 406 away from the second electromagnet 404, so that the two opposite arc-shaped support seats 407 are in contact with the lower surface of the ruler to support the ruler.

[0055] The downward pressure limiting mechanism 5 includes two groups of brackets 501 arranged on the frame 1 and a reset plate 502 vertically arranged on the fixed base plate 201. Each group of brackets 501 is provided with a downward pressure member 503 that can be magnetically connected and fixed to the mounting plate 304. The mounting plate 304 and the positioning plate 206 are jointly provided with a cross plate 504. A plurality of limit members 505 for pressing down the ruler strip are arranged at equal intervals on the cross plate 504 along the extending direction of the ruler strip, and the two downward pressure members 503 are used to press down the plurality of limit members 505 in sequence and synchronously. The limit members 505 can undergo elastic deformation when under pressure. Two elastic ropes 519 respectively connected to the two downward pressure members 503 are provided on the reset plate 502.

[0056] After the ruler hook passes under the limit piece 505 at the corresponding position, the two pressing members 503 press down the corresponding limit pieces 505 in sequence and synchronously, so that the corresponding limit pieces 505 move downward until they are against the upper surface (inner arc surface) of the ruler bar, thereby cooperating with the arc-shaped support seat 407 to limit the torsion of the ruler bar when it is extended, and to limit the swing of the ruler bar when it is rolled into the tape measure.

[0057] After the detection is completed, the pressing member 503 releases the magnetic connection with the mounting plate 304 and then automatically resets itself by the elastic force of the elastic rope 519 . The limiting member 505 resets itself in turn by its own elastic force during the resetting movement of the pressing member 503 .

[0058] The pressing member 503 includes a pressing strip 506 slidably arranged on a group of brackets 501 and a third electromagnet 507 arranged on the mounting plate 304, and an elastic rope 519 is connected to the pressing strip 506, and a magnetic block 508 and a pressing slope 509 are arranged on the end of the pressing strip 506 facing the mounting plate 304, and the magnetic block 508 is located on the upper side of the end of the pressing strip 506, and the pressing slope 509 is located on the lower side of the end of the pressing strip 506, and a through groove 510 is opened on the positioning plate 206 for the pressing strip 506 to pass through, and the magnetic block 508 is located between the positioning plate 206 and the mounting plate 304, and is larger than the size of the through groove 510.

[0059] When the first electromagnet 305 is energized to attract the ruler hook, the third electromagnet 507 is energized at the same time, so that the third electromagnet 507 attracts the magnetic block 508. In the process of the mounting plate 304 being driven away from the positioning plate 206 by the linear moving device 303, the magnetic block 508 and the third electromagnet 507 move synchronously with the mounting plate 304, and drive the pressing bar 506 to move synchronously, so that the pressing slope 509 presses down multiple limit members 505 in turn, so that the multiple limit members 505 move downward in turn until they are against the upper surface of the ruler.

[0060] After the third electromagnet 507 is powered off, the lower pressure strip 506 moves in the opposite direction to reset under the elastic force of the elastic rope 519, so that the multiple limit members 505 are released from the restrictions in turn and move upward, so that the ruler can be normally retracted into the tape measure.

[0061] The through groove 510 allows the lower pressure strip 506 to pass through and limits the passage of the magnetic block 508, so that the magnetic block 508 can only be located between the positioning plate 206 and the mounting plate 304, and when the lower pressure strip 506 is pulled to reset by the elastic rope 519, the initial position of the lower pressure strip 506 and the initial position of the magnetic block 508 can be fixed by the magnetic block 508 and the positioning plate 206, ensuring that the third electromagnet 507 can adsorb and fix the magnetic block 508 to drive the magnetic block 508 to move synchronously, and the elastic force of the elastic rope 519 can prevent the lower pressure strip 506 from moving at will.

[0062] The limiting member 505 includes a sliding seat 511 slidably inserted on the horizontal plate 504 along the vertical direction, a sliding groove 512 is provided at the bottom of the sliding seat 511, a connecting column 514 is slidably connected in the sliding groove 512 through a second spring 513, and an arc seat 515 for pressing down the inner arc surface on the ruler strip is provided at the bottom of the connecting column 514, a longitudinal plate 516 perpendicular to the horizontal plate 504 is provided at the top of the sliding seat 511, and the longitudinal plate 516 and the arc seat 515 are respectively located on both sides of the horizontal plate 504, and both sides of the top of the longitudinal plate 516 are provided with inclined panels 517 for contacting the downward pressing inclined surface 509, and a third spring 518 is slidably sleeved on the sliding seat 511, and one end of the third spring 518 is against the horizontal plate 504, and the other end of the third spring 518 is against the longitudinal plate 516;

[0063] The mounting plate 304 defines a passage 520 through which the limiting member 505 passes.

[0064] When the lower pressure bar 506 moves synchronously with the mounting plate 304, the lower pressure slope 509 contacts the corresponding inclined plate 517. As the lower pressure bar 506 continues to move, the inclined plate 517 moves downward under the pressure of the lower pressure slope 509, and drives the sliding seat 511 to move downward. At the same time, the second spring 513 is compressed, and the connecting column 514 and the arc seat 515 move downward until they contact the upper surface of the ruler, thereby limiting the torsion and swing of the ruler together with the arc support seat 407.

[0065] When the arc seat 515 is in contact with the upper surface of the ruler, the downward pressing inclined surface 509 continues to press down the inclined plate 517. The arc seat 515 will drive the connecting column 514 to move along the slide groove 512 and squeeze the third spring 518, which can not only ensure that the arc seat 515 is in contact with the ruler, but also avoid excessive contact pressure between the arc seat 515 and the ruler.

[0066] Two inclined panels 517 are arranged through the longitudinal plate 516 so that the longitudinal plate 516 is pressed by the two downward pressing inclined surfaces 509 at the same time and the force is balanced, so that the sliding seat 511 can slide downward on the transverse plate 504 smoothly.

[0067] The channel 520 is provided to prevent the mounting plate 304 from interfering with the limiting member 505 , namely the longitudinal plate 516 , the inclined plate 517 , the sliding seat 511 , the connecting column 514 and the arc seat 515 when the mounting plate 304 moves.

[0068] The distance measuring mechanism 6 includes a plurality of distance measuring sensors arranged on the mounting plate 304 , and the distance measuring sensors are used to measure the distance between themselves and the positioning plate 206 .

[0069] The distance between the tape measure and the positioning plate 206 is measured by a distance measuring sensor (this is a prior art and the technical principle will not be elaborated on in detail) such as a laser distance measuring sensor, the position of the distance measuring sensor is set to be flush with the position of the first electromagnet 305, the value on the ruler corresponding to the positioning plate 206 is read, and compared with the value measured by the distance measuring sensor to obtain the quality inspection result of the tape measure.

[0070] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A quality inspection device for a measuring instrument, comprising a frame (1), characterized in that: The frame (1) is provided with a fixing mechanism (2) for fixing the tape measure, a traction mechanism (3) for pulling the tape measure to move, and a support mechanism (4) for supporting the outer arc surface of the tape measure; the support mechanism (4) and the frame (1) are jointly provided with a downward pressing limit mechanism (5) for pressing down the inner arc surface of the tape measure when the tape measure is extended; and the traction mechanism (3) is provided with a distance measuring mechanism (6) for measuring the extended distance of the tape measure; The traction mechanism (3) moves the hook of the tape measure by magnetic traction, and after the tape measure extends from the inside of the tape measure, the support mechanism (4) supports the tape measure in sections, and the downward pressure limiting mechanism (5) presses the tape measure downward in sections; The fixing mechanism (2) comprises a fixing base plate (201) arranged on the frame (1), the fixing base plate (201) being provided with a bidirectional motion device (202), the bidirectional motion device (202) being provided with two clamping plates (203) slidably connected to the fixing base plate (201), a linear driving device (204) being provided on a side wall of one of the clamping plates (203) opposite to the other clamping plate (203), the linear driving device (204) being provided with an arc-shaped pressure device slidably connected to the clamping plate (203). The frame (205) is provided with a positioning plate (206) slidably connected to the ends of the two clamping plates (203), and in the horizontal direction and the vertical direction, the spacing between the positioning plate (206) and the fixed bottom plate (201) is greater than zero, and the positioning plate (206) is perpendicular to the fixed bottom plate (201), the bottom height of the positioning plate (206) is greater than the top height of the fixed bottom plate (201), and the inner arc surface of the arc pressure seat (205) abuts against the arc outer wall of the tape measure and is used to push the tape measure until it abuts against the positioning plate (206); The traction mechanism (3) comprises a traction base (301) arranged on the frame (1), a vertical plate (302) being vertically arranged on the traction base (301), the vertical plate (302) and the positioning plate (206) being jointly provided with a linear motion device (303) that moves in the direction in which the tape measure strip extends, a mounting plate (304) being arranged on the linear motion device (303), and a first electromagnet (305) for adsorbing a hook of the tape measure being arranged on one side of the mounting plate (304); The support mechanism (4) comprises two support plates (401) and two connecting plates (402) vertically arranged on one side of the fixed base plate (201), and the two support plates (401) are located between the two connecting plates (402), each of the support plates (401) is slidably connected with a plurality of support members (403) at equal intervals along the moving direction of the linear moving device (303), and each of the connecting plates (402) is provided with a second electromagnet (404) corresponding to the plurality of support members (403) on the corresponding support plate (401); Wherein, when the ruler bar does not pass, the second electromagnet (404) fixes the support member (403) by magnetic attraction, and the support member (403) undergoes elastic deformation; after the ruler bar passes, the second electromagnet (404) is powered off, and the corresponding two support members (403) are reset and offset by elastic force.

2. A quality inspection device for measuring instruments and equipment according to claim 1, characterized in that: An arc-shaped elastic pad (207) is provided on the inner arc surface of the arc-shaped pressure seat (205), and the thickness of the arc-shaped elastic pad (207) gradually increases from the middle to both sides.

3. The quality inspection device for measuring instruments and equipment according to claim 1, characterized in that: The support member (403) comprises a sliding column (405) which is slidably inserted on the support plate (401) along a direction perpendicular to the movement of the linear moving device (303); a magnetic plate (406) for attracting the second electromagnet (404) is arranged on one end of the sliding column (405) facing the second electromagnet (404); an arc-shaped support seat (407) for supporting a ruler is arranged on the other end of the sliding column (405); the arc-shaped support seat (407) and the magnetic plate (406) are respectively located on two sides of the support plate (401); a first spring (408) is slidably sleeved on the sliding column (405); one end of the first spring (408) is against the support plate (401); and the other end of the first spring (408) is against the arc-shaped support seat (407).

4. The quality inspection device for measuring instruments and equipment according to claim 1, characterized in that: The downward pressing and limiting mechanism (5) comprises two groups of brackets (501) arranged on the frame (1) and a reset plate (502) arranged vertically on the fixed bottom plate (201); each group of the brackets (501) is provided with a downward pressing member (503) capable of being magnetically connected and fixed to the mounting plate (304); the mounting plate (304) and the positioning plate (206) are provided with a transverse plate (504); a plurality of limiting members (505) for pressing down the ruler strip are arranged at equal intervals on the transverse plate (504) along the extension direction of the ruler strip, and the two downward pressing members (503) are used to press down the plurality of limiting members (505) in sequence and synchronously; the limiting members (505) are capable of elastic deformation when under pressure; and the reset plate (502) is provided with two elastic ropes (519) respectively connected to the two downward pressing members (503).

5. A quality inspection device for measuring instruments and equipment according to claim 4, characterized in that: The pressing member (503) comprises a pressing strip (506) slidably arranged on a group of brackets (501) and a third electromagnet (507) arranged on the mounting plate (304), and the elastic rope (519) is connected to the pressing strip (506); a magnetic block (508) and a pressing slope (509) are arranged on the end of the pressing strip (506) facing the mounting plate (304), and the magnetic block (508) is located on the upper side of the end of the pressing strip (506), and the pressing slope (509) is located on the lower side of the end of the pressing strip (506); a through slot (510) for the pressing strip (506) to pass through is provided on the positioning plate (206), and the magnetic block (508) is located between the positioning plate (206) and the mounting plate (304) and is larger than the size of the through slot (510).

6. A quality inspection device for measuring instruments and equipment according to claim 5, characterized in that: The limiting member (505) comprises a sliding seat (511) which is slidably inserted on the horizontal plate (504) along the vertical direction, a sliding groove (512) is provided at the bottom of the sliding seat (511), a connecting column (514) is slidably connected in the sliding groove (512) via a second spring (513), an arc seat (515) for pressing down the inner arc surface of the ruler strip is provided at the bottom of the connecting column (514), and a spring (515) which is perpendicular to the horizontal plate (504) is provided at the top of the sliding seat (511). A longitudinal plate (516), wherein the longitudinal plate (516) and the arc seat (515) are respectively located on both sides of the transverse plate (504), and both sides of the top of the longitudinal plate (516) are provided with inclined plates (517) for contacting the downward pressing inclined surface (509), and a third spring (518) is provided on the sliding sleeve of the sliding seat (511), and one end of the third spring (518) is against the transverse plate (504), and the other end of the third spring (518) is against the longitudinal plate (516); The mounting plate (304) is provided with a channel (520) through which the limiting member (505) passes.

7. The quality inspection device for measuring instruments and equipment according to claim 1, characterized in that: The distance measuring mechanism (6) comprises a plurality of distance measuring sensors arranged on a mounting plate (304), and the distance measuring sensors are used to measure the distance between themselves and the positioning plate (206).

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