Adjustable vacuum adsorption inspection platform

Abstract

This utility model relates to the field of testing equipment technology, specifically an adjustable vacuum adsorption inspection platform. The transmission component of this utility model transports a carrier on a conveyor track to the testing station. A lifting component drives the adsorption platform to adsorb and lift the product to be inspected from the carrier, adsorbing the product in the positioning slot onto the surface of the adsorption platform. This results in a relatively flat product, allowing for better planar visual inspection. The surface of the adsorption platform can be adjusted and locked to ensure that the surface of the vacuum stage (the adsorption surface of the product) is parallel to the camera's operating surface, thereby obtaining high-quality inspection images and improving the accuracy of 2D or 3D visual inspection. A buffer component is used to ensure that the adsorption platform is fully attached to the bottom surface of the carrier, guaranteeing a consistent lifting height for the product.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and specifically to a vacuum adsorption inspection platform with adjustable platform. Background Technology

[0002] Visual inspection systems are mainly used to inspect and screen the appearance and dimensions of parts. In actual use, the products to be inspected are usually loaded on a specific carrier for circulation and transportation. The carrier is rotated by a conveyor line or other transportation method, and then inspected by vision when it is moved to a specific position. However, during the inspection process, some products may be uneven in height on the carrier due to vibration during the transmission of the carrier. This can easily lead to misjudgment of the visual inspection of the parts, thus affecting the accuracy of the inspection. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an adjustable vacuum adsorption inspection platform that allows the product to be inspected to be relatively flat, so as to achieve a better plane for visual inspection, obtain high-quality inspection images, and improve the accuracy of visual inspection.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A platform-adjustable vacuum adsorption inspection platform, comprising:

[0006] The conveying mechanism includes a conveying component and a conveying track for conveying a carrier, the carrier being provided with a fixture slot for loading products to be inspected, and the conveying track being provided with an inspection station. The conveying component is used to transfer the carrier on the conveying track to the inspection station.

[0007] A positioning mechanism is provided below the inspection station. The positioning mechanism includes a lifting component and an adsorption platform. The adsorption platform is driven to the lifting component. The lifting component is used to drive the adsorption platform to adsorb and lift the product to be inspected on the carrier.

[0008] A buffer assembly is provided between the lifting assembly and the adsorption platform. The buffer assembly includes a bottom plate and a top plate. The adsorption platform is placed on the top plate. The lifting assembly is driven to the bottom plate. Buffer members are provided at the four corners of the bottom plate and the top plate. The buffer members are used to fit the adsorption platform against the bottom surface of the carrier.

[0009] In one embodiment of this utility model, the buffer component includes a buffer spring and a buffer screw. Buffer holes are provided at the four corners of the top plate and the bottom plate. The buffer screw passes through the buffer holes of the top plate and the bottom plate. The buffer spring is sleeved on the buffer screw. The two ends of the buffer spring abut against the top plate and the bottom plate respectively. A screw is provided on the bottom plate. The buffer screw is connected to the bottom plate by the screw.

[0010] In one embodiment of the present invention, the adsorption platform includes a base plate, on which a plurality of lifting blocks matching the fixture groove are uniformly arranged, and a plurality of adsorption holes are provided on the lifting blocks. The base plate is disposed on the adsorption middle plate, the adsorption middle plate is disposed on the top plate, and an air valve connected to the adsorption holes is provided on the top plate.

[0011] In one embodiment of this utility model, the lifting assembly includes a lifting frame, a sliding frame is slidably mounted on the lifting frame, a base plate is mounted on the sliding frame, a lifting cylinder is mounted on the lifting frame, the lifting cylinder is drivenly connected to the base plate, and the lifting cylinder is used to drive the base plate to move up and down reciprocally along the lifting frame.

[0012] In one embodiment of this utility model, detection holes are provided on both sides of the base plate, and detection sensors are provided on the detection holes. A test opening matching the detection sensor is provided on the adsorption platform. The detection sensor is used to detect the position of the carrier on the conveying track.

[0013] In one embodiment of this utility model, the conveying track includes a conveying frame, guide plates are provided on both sides of the conveying frame, guide slots are provided on the guide plates, and pressing cylinders are provided on both sides of the track frame. The pressing cylinders are driven to connect with the pressing frame, the pressing frame is slidably mounted on the track frame, and the pressing cylinders drive the pressing frame to press and position the carrier on the positioning station on the guide slots.

[0014] In one embodiment of the present invention, the transmission component includes a material picking rack and upper and lower cylinders disposed on the material picking rack. A lifting bracket is slidably mounted on the material picking rack. The upper and lower cylinders are drivenly connected to the lifting bracket. A transport gripper is disposed on the lifting bracket. The material picking rack is drivenly connected to a driving component. The driving component is used to drive the carrier held by the transport gripper to be transferred to the inspection station.

[0015] In one embodiment of this utility model, the lifting bracket is provided with two transport grippers, each transport gripper including a gripper cylinder. The two gripper arms of the gripper cylinder are provided with clamping plates, and the clamping plates are provided with clamping grooves that match the edge of the carrier. The gripper cylinder drives the two clamping plates to clamp the carrier.

[0016] In one embodiment of this utility model, the driving component includes a driving frame, which is slidably mounted on the slide rail of the conveying track. The material picking frame is disposed on the driving frame. Synchronous pulleys are disposed on both sides of the conveying track, and a synchronous belt is disposed between the synchronous pulleys. The driving frame and the synchronous belt are connected by a connecting plate, and the synchronous pulleys are driven by a driving motor.

[0017] In one embodiment of this utility model, an adjustment component is further included. The adjustment component includes a fixed frame and a movable frame. The conveying track is disposed on the fixed frame and the movable frame. The movable frame is slidably disposed on the guide rail. An adjustment screw is rotatably disposed on the fixed frame. The adjustment screw is connected to a nut on the movable frame. A rotating handle is disposed at the free end of the adjustment screw. The distance between the movable frame and the fixed frame is adjusted by rotating the adjustment screw to move the movable frame along the guide rail.

[0018] The beneficial effects of this utility model are:

[0019] The transmission component of this invention transfers the carrier on the conveyor track to the inspection station. The lifting component drives the adsorption platform to adsorb and lift the product to be inspected on the carrier, adsorbing the product in the positioning slot onto the surface of the adsorption platform. This results in a relatively flat product, allowing for better planar visual inspection. The surface of the adsorption platform can be adjusted and locked to ensure that the surface of the vacuum stage (the adsorption surface of the product) is parallel to the camera's operating surface, thereby obtaining high-quality inspection images and improving the accuracy of 2D or 3D visual inspection. The buffer component is used to fit the bottom surface of the adsorption platform against the bottom surface of the carrier, ensuring that the entire adsorption platform is attached to the bottom surface of the carrier and that the lifting height of the product is consistent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an adjustable vacuum adsorption inspection platform according to the present invention.

[0021] Figure 2 This is a schematic diagram of the conveying track of this utility model.

[0022] Figure 3 This is a schematic diagram of the positioning mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram of the transmission component of this utility model.

[0024] Explanation of the numbers in the diagram: 1. Conveyor track; 11. Conveyor frame; 12. Guide plate; 13. Guide slot; 14. Pressing frame; 15. Pressing cylinder; 2. Carrier; 21. Fixture slot; 3. Adsorption platform; 31. Base plate; 32. Lifting block; 33. Adsorption middle plate; 34. Top plate; 35. Bottom plate; 36. Buffer hole; 37. Buffer screw; 38. Buffer spring; 39. Screw; 391. Lifting frame; 392. Lifting cylinder; 393. Sliding frame; 394. Detection sensor; 395. Test opening; 4. Transfer assembly; 41. Picking rack; 42. Upper and lower cylinders; 43. Lifting bracket; 44. Gripper cylinder; 45. Clamping plate; 46. Sliding rail; 47. Compression spring; 5. Adjustment assembly; 51. Fixed frame; 52. Moving frame; 53. Guide rail; 54. Adjusting screw; 6. Synchronous pulley; 61. Synchronous belt; 62. Drive frame; 63. Drive motor. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1-4 As shown, a platform-adjustable vacuum adsorption inspection platform includes:

[0027] The conveying mechanism includes a conveying component 4 and a conveying track 1 for conveying a carrier 2. The carrier 2 is provided with a fixture slot 21 for loading products to be inspected. The conveying track 1 is provided with an inspection station. The conveying component 4 is used to transfer the carrier 2 on the conveying track 1 to the inspection station.

[0028] A positioning mechanism is provided below the inspection station. The positioning mechanism includes a lifting component and an adsorption platform 3. The adsorption platform 3 is driven to the lifting component. The lifting component is used to drive the adsorption platform 3 to adsorb and lift the product to be inspected on the carrier 2.

[0029] A buffer assembly is provided between the lifting assembly and the adsorption platform 3. The buffer assembly includes a bottom plate 35 and a top plate 34. The adsorption platform 3 is disposed on the top plate 34. The lifting assembly is driven to the bottom plate 35. Buffer members are provided at the four corners of the bottom plate 35 and the top plate 34. The buffer members are used to fit the bottom surface of the adsorption platform 3 against the carrier 2.

[0030] The transmission component 4 of this utility model transfers the carrier 2 on the conveying track 1 to the inspection station. The lifting component drives the adsorption platform 3 to adsorb and lift the product to be inspected on the carrier 2, adsorbing the product to be inspected in the positioning groove onto the surface of the adsorption platform 3, so that the product to be inspected is relatively flat, so as to achieve a better plane for visual inspection. The surface of the adsorption platform 3 can be adjusted and locked to make the surface of the vacuum stage (the adsorption surface of the product to be inspected) parallel to the camera running surface, thereby obtaining high-quality inspection images and improving the accuracy of 2D or 3D visual inspection. The buffer is used to fit the bottom surface of the adsorption platform 3 with the bottom surface of the carrier 2, ensuring that the entire adsorption platform 3 is attached to the bottom surface of the carrier 2, and ensuring that the lifting height of the product is consistent.

[0031] In one embodiment of this utility model, the buffer component includes a buffer spring 38 and a buffer screw 37. Buffer holes 36 are provided at the four corners of the top plate 34 and the bottom plate 35. The buffer screw 37 passes through the buffer holes 36 of the top plate 34 and the bottom plate 35. The buffer spring 38 is sleeved on the buffer screw 37. The two ends of the buffer spring 38 abut against the top plate 34 and the bottom plate 35 respectively. A screw 39 is provided on the bottom plate 35. The buffer screw 37 is connected to the bottom plate 35 by the screw 39.

[0032] Specifically, the lifting cylinder 392 continues to drive the base plate 35 to move upward along the lifting frame 391 to compress the buffer spring 38 on the buffer component, ensuring that the base plate 31 is completely attached to the carrier 2, and ensuring the consistency of product lifting. This application adopts an automatic method to lift and adsorb the products to be inspected flowing from the track, adsorbing the products to be inspected onto the surface of the adsorption platform 3, so that the products to be inspected are relatively flat, so as to achieve a better plane for visual inspection.

[0033] In one embodiment of the present invention, the adsorption platform 3 includes a base plate 31, on which a plurality of lifting blocks 32 matching the fixture groove 21 are uniformly arranged, and a plurality of adsorption holes are provided on the lifting blocks 32. The base plate 31 is disposed on the adsorption middle plate 33, the adsorption middle plate 33 is disposed on the top plate 34, and the top plate 34 is provided with an air valve connected to the adsorption holes.

[0034] Specifically, when the lifting block 32 comes into contact with the product, the suction hole draws in air to generate negative pressure, which adsorbs and positions the product until the substrate 31 comes into contact with the bottom surface of the carrier 2. This can further ensure the adsorption and positioning effect of the product and achieve better planar visual inspection.

[0035] In one embodiment of the present invention, the lifting assembly includes a lifting frame 391, a sliding frame 393 is slidably mounted on the lifting frame 391, a base plate 35 is mounted on the sliding frame 393, a lifting cylinder 392 is mounted on the lifting frame 391, the lifting cylinder 392 is drivenly connected to the base plate 35, and the lifting cylinder 392 is used to drive the base plate 35 to move up and down reciprocally along the lifting frame 391.

[0036] Specifically, the lifting cylinder 392 is used to drive the base plate 35 to move upward along the lifting frame 391, so that the lifting block 32 on the base plate 31 passes through the fixture slot 21 of the carrier 2. The lifting block 32 abuts against the product, and at the same time, the suction hole draws air to generate negative pressure to adsorb and position the product until the base plate 31 abuts against the bottom surface of the carrier 2, so that the adsorption platform 3 can be lifted and lowered stably.

[0037] In one embodiment of this utility model, detection holes are provided on both sides of the base plate 35, and detection sensors 394 are provided on the detection holes. The adsorption platform 3 is provided with a test opening 395 that matches the detection sensor 394. The detection sensor 394 is used to detect the position of the carrier 2 on the conveying track 1.

[0038] Specifically, the detection sensor 394 set on the detection hole and the test opening 395 can be exposed above the adsorption platform 3 to detect the position of the carrier 2 above the adsorption platform 3, ensuring the alignment accuracy between the carrier 2 and the adsorption platform 3, and facilitating the lifting block 32 to accurately lift the product.

[0039] In one embodiment of this utility model, the conveying track 1 includes a conveying frame 11, guide plates 12 are provided on both sides of the conveying frame 11, guide slots 13 are provided on the guide plates 12, and pressing cylinders 15 are provided on both sides of the track frame. The pressing cylinders 15 are drivenly connected to the pressing frame 14, and the pressing frame 14 is slidably mounted on the track frame. The pressing cylinders 15 drive the pressing frame 14 to press and position the carrier 2 on the positioning station on the guide slots 13.

[0040] Specifically, the carrier 2 loaded with the product is placed on the conveyor track 1, and the two sides of the carrier 2 slide on the guide slot 13. The drive motor 63 drives the carrier 2 to the positioning station. The pressing cylinder 15 drives the pressing frame 14 to press and position the two sides of the carrier 2 on the guide slot 13, so as to avoid the carrier 2 or the product shaking during subsequent inspection and improve the inspection accuracy.

[0041] In one embodiment of the present invention, the transmission component 4 includes a material picking rack 41 and an upper and lower cylinder 42 disposed on the material picking rack 41. A lifting bracket 43 is slidably mounted on the material picking rack 41. The upper and lower cylinder 42 is drivenly connected to the lifting bracket 43. A transport gripper is disposed on the lifting bracket 43. The material picking rack 41 is drivenly connected to a driving component. The driving component is used to drive the carrier 2 held by the transport gripper to the inspection station.

[0042] Specifically, the drive frame 62 moves to the loading position of the carrier 2, the upper and lower cylinders 42 drive the lifting bracket 43 to move to a suitable height, the transport gripper clamps the carrier 2, and the drive component drives the carrier 2 clamped by the transport gripper to the inspection station, realizing the rapid transfer of the carrier 2.

[0043] In one embodiment of the present invention, the lifting bracket 43 is provided with two transport grippers, each transport gripper including a gripper cylinder 44. The two gripper arms of the gripper cylinder 44 are provided with clamping plates 45. The clamping plates 45 are provided with clamping grooves that match the edge of the carrier 2. The gripper cylinder 44 drives the two clamping plates 45 to clamp the carrier 2.

[0044] Specifically, the lifting bracket 43 is equipped with two transport grippers, which can push / pull the carriers 2 on both sides of the conveying track 1. It is practical. The upper and lower cylinders 42 drive the lifting bracket 43 to move to a suitable height. At the same time, the gripper cylinder 44 drives the two clamping plates 45 to clamp the carriers 2. The clamping grooves on the clamping plates 45 can better stabilize the carriers 2 and improve the transmission stability.

[0045] The lifting bracket 43 is provided with two transport grippers and a sliding rail 46. One of the two transport grippers slides on the sliding rail 46, and a compression spring 47 is provided between the two transport grippers. The transport gripper on the sliding rail 46 can push the carrier 2, and the compression spring 47 can buffer the force of the transport gripper pushing the material.

[0046] In one embodiment of the present invention, the driving component includes a driving frame 62, which is slidably mounted on the slide rail of the conveying track 1. The material picker 41 is disposed on the driving frame 62. Synchronous pulleys 6 are disposed on both sides of the conveying track 1, and a synchronous belt 61 is disposed between the synchronous pulleys 6. The driving frame 62 and the synchronous belt 61 are connected by a connecting plate, and the synchronous pulleys 6 are driven by a driving motor 63.

[0047] Specifically, the drive frame 62 is connected to the synchronous belt 61 via a connecting plate, and the synchronous wheel 6 is driven by the drive motor 63. The drive motor 63 drives the synchronous wheel 6 to rotate, thereby driving the drive frame 62 connected to the synchronous belt 61 to move. This allows the drive frame 62 to move to the loading position, positioning station, or unloading position of the carrier 2, enabling rapid transfer of the carrier 2 without being restricted by the carrier 2 and the conveyor track 1. This provides good compatibility and ensures smooth transfer of the carrier 2.

[0048] In one embodiment of this utility model, an adjustment component 5 is further included. The adjustment component 5 includes a fixed frame 51 and a movable frame 52. The conveying track 1 is disposed on the fixed frame 51 and the movable frame 52. The movable frame 52 is slidably disposed on the guide rail 53. An adjustment screw 54 is rotatably disposed on the fixed frame 51. The adjustment screw 54 is connected to a nut on the movable frame 52. A rotating handle is provided at the free end of the adjustment screw 54. By rotating the adjustment screw 54, the movable frame 52 moves along the guide rail 53 to adjust the distance between the movable frame 52 and the fixed frame 51.

[0049] Specifically, the conveying track 1 is set on the fixed frame 51 and the movable frame 52. By rotating the adjusting screw 54, the movable frame 52 moves along the guide rail 53 to adjust the distance between the movable frame 52 and the fixed frame 51. This can change the distance of the conveying track 1, which can be adapted to the transmission of various specifications of carriers 2 and has a wide range of applications.

[0050] Usage process

[0051] The carrier 2, loaded with products, is placed on the conveyor track 1. The sides of the carrier 2 slide on the guide slots 13. The drive frame 62 is connected to the synchronous belt 61 via a connecting plate. The synchronous wheel 6 is driven by the drive motor 63. The drive motor 63 drives the synchronous wheel 6 to rotate, thereby moving the drive frame 62 connected to the synchronous belt 61. The drive frame 62 moves to the loading position of the carrier 2. The upper and lower cylinders 42 move the lifting bracket 43 to a suitable height. Simultaneously, the gripper cylinder 44 drives the two clamping plates 45 to clamp the carrier 2. The drive motor 63 drives the carrier 2 to the positioning station. The pressing cylinder 15 drives the pressing frame 14 to press and position the sides of the carrier 2 on the guide slots 13, preventing the carrier 2 or product from shaking during subsequent inspection and improving inspection accuracy. The lifting cylinder 392 is used to move the base plate 35 upwards along the lifting frame 391. The lifting block 32 on the substrate 31 passes through the fixture slot 21 of the carrier 2. The lifting block 32 abuts against the product, and the suction hole draws air to generate negative pressure to adsorb and position the product until the substrate 31 abuts against the bottom surface of the carrier 2. At the same time, the lifting cylinder 392 continues to drive the base plate 35 to move upward along the lifting frame 391 to compress the buffer spring 38 on the buffer component, ensuring that the substrate 31 is completely attached to the carrier 2 and ensuring consistent lifting of the product. This application uses an automatic method to lift and adsorb the product to be inspected flowing from the track, adsorbing the product to be inspected onto the surface of the adsorption platform 3, so that the product to be inspected is relatively flat, so as to achieve a better plane for visual inspection. The surface of the adsorption platform 3 can be adjusted and locked to make the vacuum stage surface (the adsorption surface of the product to be inspected) parallel to the camera running surface, thereby obtaining a high-quality inspection image and improving the accuracy of 2D or 3D visual inspection.

[0052] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A platform-adjustable vacuum-suction inspection platform, characterized by, include: The conveying mechanism includes a conveying component and a conveying track for conveying a carrier, the carrier being provided with a fixture slot for loading products to be inspected, and the conveying track being provided with an inspection station. The conveying component is used to transfer the carrier on the conveying track to the inspection station. A positioning mechanism is provided below the inspection station. The positioning mechanism includes a lifting component and an adsorption platform. The adsorption platform is driven to the lifting component. The lifting component is used to drive the adsorption platform to adsorb and lift the product to be inspected on the carrier. A buffer assembly is provided between the lifting assembly and the adsorption platform. The buffer assembly includes a bottom plate and a top plate. The adsorption platform is placed on the top plate. The lifting assembly is driven to the bottom plate. Buffer members are provided at the four corners of the bottom plate and the top plate. The buffer members are used to fit the adsorption platform against the bottom surface of the carrier.

2. The platform-adjustable vacuum-suction inspection platform according to claim 1, wherein, The buffer component includes a buffer spring and a buffer screw. Buffer holes are provided at the four corners of the top plate and the bottom plate. The buffer screw passes through the buffer holes of the top plate and the bottom plate. The buffer spring is sleeved on the buffer screw. The two ends of the buffer spring abut against the top plate and the bottom plate respectively. Screws are provided on the bottom plate. The buffer screw is connected to the bottom plate by screws.

3. The platform-adjustable vacuum-suction inspection platform according to claim 1, wherein, The adsorption platform includes a base plate, on which a plurality of lifting blocks matching the fixture slot are uniformly arranged. Each lifting block is provided with a plurality of adsorption holes. The base plate is disposed on the adsorption middle plate, which is disposed on the top plate. The top plate is provided with an air valve connected to the adsorption holes.

4. The platform-adjustable vacuum suction inspection platform according to claim 1, wherein, The lifting assembly includes a lifting frame, a sliding frame is slidably mounted on the lifting frame, a base plate is mounted on the sliding frame, a lifting cylinder is mounted on the lifting frame, the lifting cylinder is driven to connect with the base plate, and the lifting cylinder is used to drive the base plate to move up and down reciprocally along the lifting frame.

5. The platform adjustable vacuum suction inspection platform of claim 1, wherein, The base plate has detection holes on both sides, and detection sensors are installed in the detection holes. The adsorption platform has test openings that match the detection sensors. The detection sensors are used to detect the position of the carrier on the conveying track.

6. The platform adjustable vacuum suction inspection platform of claim 1, wherein, The conveying track includes a conveying frame, with guide plates on both sides of the conveying frame and guide slots on the guide plates. Pressing cylinders are installed on both sides of the track frame, and the pressing cylinders are driven to the pressing frame. The pressing frame slides on the track frame, and the pressing cylinders drive the pressing frame to press and position the carrier at the positioning station on the guide slots.

7. The platform-adjustable vacuum-suction inspection platform according to claim 1, wherein, The transmission component includes a material picking rack and upper and lower cylinders mounted on the material picking rack. A lifting bracket is slidably mounted on the material picking rack. The upper and lower cylinders are driven to the lifting bracket. A transport gripper is mounted on the lifting bracket. The material picking rack is driven to a drive component. The drive component is used to drive the carrier held by the transport gripper to the inspection station.

8. The platform-adjustable vacuum suction inspection platform according to claim 7, wherein, The lifting support is equipped with two transport grippers, each transport gripper including a gripper cylinder. The two gripper arms of the gripper cylinder are equipped with clamping plates, and the clamping plates are equipped with clamping grooves that match the edge of the carrier. The gripper cylinder drives the two clamping plates to clamp the carrier.

9. The platform-adjustable vacuum suction inspection platform according to claim 7, wherein, The driving component includes a driving frame that slides on a slide rail of a conveying track. The material picker is mounted on the driving frame. Synchronous pulleys are provided on both sides of the conveying track, and a synchronous belt is provided between the synchronous pulleys. The driving frame and the synchronous belt are connected by a connecting plate, and the synchronous pulleys are driven by a driving motor.

10. The platform adjustable vacuum suction inspection platform of claim 1, wherein, It also includes an adjustment assembly, which includes a fixed frame and a movable frame. The conveying track is set on the fixed frame and the movable frame. The movable frame slides on the guide rail. An adjustment screw is rotated on the fixed frame. The adjustment screw is connected to a nut on the movable frame. A rotating handle is provided at the free end of the adjustment screw. By rotating the adjustment screw, the movable frame moves along the guide rail to adjust the distance between the movable frame and the fixed frame.

Images