Double-channel rapid lamination device for rock wool production line

Abstract

The rock wool production line double-channel rapid plate stacking device disclosed by the application relates to the technical field of rock wool production line double-channel rapid plate stacking devices, and comprises a workbench, a driving mechanism and an adjusting mechanism. The left side of the upper end of the workbench is provided with receiving grooves, box doors are hingedly connected to the material taking openings arranged in the middle of the left walls of the receiving grooves, a protective cover is arranged in the middle of the upper end of the workbench, a mounting cover is arranged at the upper end of the protective cover, guide sliding grooves are arranged in the protective cover, guide sliding columns are arranged in the guide sliding grooves, the longitudinally adjacent two guide sliding columns are slidably connected with the guide sliding holes arranged at the left end of the connecting plate in a corresponding mode, and the mounting grooves arranged at the upper end of the connecting plate are slidably connected with the sliding columns. The rock wool production line double-channel rapid plate stacking device can drive the cutting blade to cut rock wool, replaces the traditional manual cutting mode, and can adjust the cutting length of the rock wool according to actual conditions. The device has a simple structure, a low cost and a relatively wide universality.

Description

Technical Field

[0001] The present invention relates to the technical field of rock wool processing equipment, and in particular to a dual-channel rapid plate stacking device for a rock wool production line. Background Art

[0002] Rock wool products are made of high-quality basalt, dolomite and other raw materials. Rock wool is mainly used for insulation of walls, roofs, doors and floors in building insulation, among which wall insulation is the most important. In industry, rock wool is widely used in industrial equipment, ships, boilers, heat exchangers, industrial storage tanks, flame retardants, etc.

[0003] During the rock wool production process, the rock wool needs to be stacked to facilitate the subsequent packaging of the rock wool. Currently, in the process of stacking the rock wool, the rock wool is usually cut manually using cutting equipment, and then the staff stacks the cut rock wool neatly to achieve the stacking of the rock wool.

[0004] In the process of stacking rock wool, although it is possible to cut and stack the rock wool manually, this method imposes a relatively large workload on personnel and reduces the efficiency of rock wool stacking. Some manufacturers use rock wool stacking devices to quickly stack rock wool, thereby replacing the traditional manual stacking method. Although this reduces the workload of personnel, it is usually difficult to adjust the cutting length of rock wool during the stacking process, and its versatility is relatively low. Some rock wool production lines have dual-channel rapid stacking devices that adjust the position of the cutting equipment inside them by setting additional adjustment components. Although this achieves the purpose of adjustable cutting length of rock wool, it also makes the overall structure inside the entire equipment more complicated and the cost is relatively high. For this reason, we propose a dual-channel rapid stacking device for a rock wool production line. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a dual-channel rapid stacking device for a rock wool production line. Through the cooperation of the cam and the pressure plate, the position of the cutting blade can be adjusted, so that the cutting blade can cut the rock wool, replacing the traditional manual cutting method. It improves the stacking efficiency of the rock wool while also reducing the workload of personnel. Through the cooperation of the push rod and the cross plate, the cutting length of the rock wool can be adjusted according to actual conditions. It has a simple structure, low cost, and relatively wider versatility, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a dual-channel rapid plate stacking device for a rock wool production line, comprising a workbench, a driving mechanism, and an adjusting mechanism;

[0007] Workbench: A storage groove is provided on the left side of its upper end, and a box door is hinged in the material taking port provided in the middle of the left wall of the storage groove. A protective cover is provided in the middle of the upper end of the workbench, and a mounting cover is provided on the upper end of the protective cover. Guide slide grooves are provided inside the protective cover, and guide slide columns are provided inside the guide slide grooves. Two longitudinally adjacent guide slide columns are slidably connected to the guide slide holes provided correspondingly at the left end of the connecting plate, and slide columns are slidably connected in the mounting grooves provided at the upper end of the connecting plate. A pressure plate is provided at the lower end of the slide column, and an adjustment plate is provided at the upper end of the slide column.

[0008] Cutting mechanism: It is arranged inside the protective cover, and the cutting mechanism is located inside the mounting cover;

[0009] Adjustment mechanism: It is arranged inside the protective cover. The adjustment mechanism is slidably connected to the guide slide column through the sliding hole set at the right end. Through the cooperation of the cam and the pressure plate, the position of the cutting blade can be adjusted, so that the cutting blade can cut the rock wool, replacing the traditional manual cutting method. It improves the stacking efficiency of the rock wool and reduces the workload of the personnel. Through the cooperation of the push rod and the cross plate, the cutting length of the rock wool can be adjusted according to the actual situation. It has a simple structure, low cost and relatively wider versatility.

[0010] Furthermore, it also includes a control switch, which is arranged at the front end of the protective cover. The output end of the control switch is electrically connected to the external power supply and can regulate the electrical components inside the device.

[0011] Furthermore, the cutting mechanism includes a hexagonal sliding column, a fixed plate and a cutting blade. The hexagonal sliding column is slidably connected to the hexagonal sliding hole set on the right side of the top wall of the protective cover. The lower end of the hexagonal sliding column is provided with a cutting blade, and the upper end of the hexagonal sliding column is provided with a fixed plate. The fixed plate is located inside the mounting cover and can cut the rock wool.

[0012] Furthermore, the cutting mechanism also includes a buffer spring, which is respectively arranged between the lower end of the fixed plate and the upper end of the protective cover. The buffer springs are all sleeved on the outside of the upper side of the hexagonal sliding column. The buffer spring can drive the cutting blade to move and reset.

[0013] Furthermore, the adjustment mechanism includes a mounting plate, a horizontal plate and an adjustment column. The mounting plates are slidably connected to the guide sliding columns through sliding holes set at the right ends. A horizontal plate is set between the relative inner sides of two longitudinally adjacent mounting plates. Adjustment columns are set on the left sides of the two horizontal plates facing away from the outer sides, which can adjust the position of the pressure plate.

[0014] Furthermore, the adjustment mechanism also includes a mounting seat, a push rod, an adjustment rod and a limiting slide. The mounting seats are respectively connected to the left side of the interior of the protective cover by fastening screws, and the end of the mounting seat away from the center of the interior of the protective cover is rotatably connected to the push rod through a bearing. The upper end of the push rod is provided with a limiting slide, and the lower end of the push rod is provided with an adjustment rod. The adjustment columns are respectively located inside the vertically adjacent limiting slides, and can adjust the position of the horizontal plate.

[0015] Furthermore, it also includes an output rod, a cam and a motor. The output rods are rotatably connected to the middle of the right wall of the mounting cover through bearings, the cams are arranged at the left end of the output rods, and the motors are arranged at the right end of the mounting cover. The left ends of the motor output shafts are fixedly connected to the right ends of the laterally adjacent output rods, and the input ends of the motors are electrically connected to the output ends of the control switches, so that the position of the cutting blade can be adjusted through the pressure plate.

[0016] Furthermore, it also includes springs, which are respectively arranged between the right end of the connecting plate and the right wall of the guide slide groove. The springs are all sleeved on the outside of the right side of the guide slide column. The elastic force generated by the extension of the spring drives the pressure plate to move to the left and reset through the connecting plate.

[0017] Furthermore, it also includes a return spring, which is respectively arranged between the lower end of the adjustment plate and the upper end of the connecting plate. The return springs are all sleeved on the outside of the upper side of the sliding column. The tension generated by the extension of the return spring can drive the pressure plate to move and reset through the adjustment plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the dual-channel rapid plate stacking device for the rock wool production line has the following advantages:

[0019] 1. When the connecting plate moves to the upper side of the fixed plate, the motor starts to run through the control switch, and the output shaft of the motor drives the cam to rotate through the output rod. When the contact point between the cam and the adjusting plate changes from the centroid to the telecentricity, the cam drives the pressure plate to move downward through the adjusting plate, the reset spring contracts, and the pressure plate drives the cutting blade to move downward through the fixed plate, the buffer spring extends, and then the rock wool is cut by the cutting blade. Through the coordination of the cam and the pressure plate, the position of the cutting blade can be adjusted, so that the cutting blade can cut the rock wool, replacing the traditional manual cutting method, improving the stacking efficiency of the rock wool while also reducing the workload of personnel.

[0020] 2. During operation, the rock wool is fed into the interior of the protective cover through an external conveying device. When the left end of the rock wool contacts the right end of the adjusting rod, the rock wool drives the push rod to rotate through the adjusting rod. At this time, the adjusting column rotates inside the limiting slide and rotates relative to the limiting slide, thereby causing the push rod to drive the cross plate to move to the right. When the right end of the cross plate contacts the left end of the connecting plate, the cross plate drives the connecting plate to move to the right, and the spring contracts. Before use, the staff can adjust the position of the mounting seat and then adjust the length of the rock wool cut. When the mounting seat is close to the left wall of the protective cover, the length of the cut rock wool is longer. When the mounting seat is away from the left wall of the protective cover, the length of the cut rock wool is shorter. Through the coordination of the push rod and the cross plate, the cutting length of the rock wool can be adjusted according to actual conditions. The structure is simple, the cost is low, and the versatility is relatively wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the left side structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the front side cross-sectional structure of the present invention;

[0024] Figure 4 This is an enlarged structural diagram of point A of the present invention.

[0025] In the figure: 1 workbench, 2 protective cover, 3 control switch, 4 mounting cover, 5 cutting mechanism, 51 hexagonal sliding column, 52 fixing plate, 53 cutting blade, 54 buffer spring, 6 output rod, 7 cam, 8 adjustment mechanism, 81 mounting seat, 82 push rod, 83 adjusting rod, 84 limiting slide, 85 mounting plate, 86 cross plate, 87 adjusting column, 9 guide slide, 10 guide slide, 11 spring, 12 box door, 13 storage slot, 14 return spring, 15 connecting plate, 16 slide, 17 pressure plate, 18 adjustment plate, 19 motor. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-4 , this embodiment provides a technical solution: a dual-channel rapid plate stacking device for a rock wool production line, comprising a workbench 1, a driving mechanism and an adjusting mechanism 8;

[0028] Workbench 1: The left side of its upper end is respectively provided with a storage groove 13, and the material taking port provided in the middle of the left wall of the storage groove 13 is hinged with a box door 12 through a hinge. The middle of the upper end of the workbench 1 is provided with a protective cover 2, and the upper end of the protective cover 2 is provided with a mounting cover 4. The interior of the protective cover 2 is respectively provided with a guide slide groove 9, and the interior of the guide slide groove 9 is respectively provided with a guide slide column 10. The two longitudinally adjacent guide slide columns 10 are respectively slidably connected to the guide slide holes provided correspondingly at the left end of the connecting plate 15, and the mounting groove provided at the upper end of the connecting plate 15 is slidably connected with a slide column 16, and the lower end of the slide column 16 is provided with a pressure plate 17. The slide column 16 An adjustment plate 18 is provided at the upper end of each of the rock wool production line. Before use, the dual-channel rapid stacking device of the rock wool production line is moved to the designated work location by an external traction device, and then the workbench is installed and docked with the corresponding work station to achieve support and fixation of the workbench 1 and the equipment above. During operation, the rock wool is fed into the interior of the protective cover 2 by an external conveying device, and then the rock wool is cut by a cutting device. The cut rock wool falls into the interior of the storage groove 13, thereby achieving rapid stacking of the rock wool. When the storage groove 13 is full, the box door 12 is opened, and the stacked rock wool can be taken out by an external device.

[0029] Cutting mechanism 5: It is arranged inside the protective cover 2. The cutting mechanism 5 is located inside the mounting cover 4. The cutting mechanism 5 includes a hexagonal sliding column 51, a fixing plate 52 and a cutting blade 53. The hexagonal sliding column 51 is slidably connected to the hexagonal sliding hole set on the right side of the top wall of the protective cover 2. The lower end of the hexagonal sliding column 51 is provided with a cutting blade 53. The upper end of the hexagonal sliding column 51 is provided with a fixing plate 52. The fixing plate 52 is located inside the mounting cover 4. The cutting mechanism 5 also includes a buffer spring 54. The buffer spring 54 is respectively provided Between the lower end of the fixed plate 52 and the upper end of the protective cover 2, the buffer spring 54 is sleeved on the outside of the upper side of the hexagonal sliding column 51. Through the regulation of the equipment, the driving equipment starts to run, and the driving equipment drives the cutting blade 54 to move downward through the fixed plate 52. The buffer spring 54 extends, and then the cutting blade 54 cuts the rock wool, thereby replacing the traditional manual cutting method, improving the efficiency of rock wool stacking and reducing the workload of personnel;

[0030] Adjustment mechanism 8: It is arranged inside the protective cover 2, and the adjustment mechanism 8 is slidably connected to the guide slide post 10 through the sliding hole provided at the right end. The adjustment mechanism 8 includes a mounting plate 85, a horizontal plate 86 and an adjustment column 87. The mounting plates 85 are slidably connected to the guide slide post 10 through the sliding holes provided at the right end. A horizontal plate 86 is provided between the opposite inner sides of the two longitudinally adjacent mounting plates 85, and an adjustment column 87 is provided on the left side of the two horizontal plates 86 facing away from the outer sides. The adjustment mechanism 8 also includes a mounting seat 81, a push rod 82, an adjustment rod 83 and a limiting slide groove 84. The mounting seat 81 is connected to the left side of the inside of the protective cover 2 by fastening screws, and the end of the mounting seat 81 away from the inner center of the protective cover 2 is rotatably connected to the push rod 82 through a bearing. The upper end of the push rod 82 is provided with a limiting slide groove 84, and the lower end of the push rod 82 is provided with an adjusting rod 83. The adjusting column 87 is respectively located in the inner side of the vertically adjacent limiting slide grooves 84. When the left end of the rock wool is in contact with the right end of the adjusting rod 83, the rock wool is driven by the adjusting rod 83 to rotate the push rod 82. At this time, the adjusting column 87 rotates in the limiting slide 84 and rotates relative to the limiting slide 84, thereby causing the push rod 82 to drive the cross plate 86 to move to the right. When the right end of the cross plate 86 contacts the left end of the connecting plate 15, the cross plate 86 drives the connecting plate 15 to move to the right. Before use, the staff can adjust the position of the mounting seat 81, thereby adjusting the length of the rock wool cut. When the mounting seat 81 is close to the left wall of the protective cover 2, the length of the cut rock wool is longer. When the mounting seat 81 is away from the left wall of the protective cover 2, the length of the cut rock wool is shorter. By cooperating with the push rod 82 and the cross plate 86, the cutting length of the rock wool can be adjusted according to actual conditions. The structure is simple, the cost is low, and the versatility is relatively wide.

[0031] Among them: it also includes a control switch 3, which is arranged at the front end of the protective cover 2. The output end of the control switch 3 is electrically connected to the external power supply, and can regulate the electrical components inside the device.

[0032] Wherein: the driving mechanism includes an output rod 6, a cam 7 and a motor 19. The output rod 6 is rotatably connected to the middle part of the right wall of the mounting cover 4 through a bearing. The cam 7 is arranged at the left end of the output rod 6. The motor 19 is arranged at the right end of the mounting cover 4. The left end of the output shaft of the motor 19 is fixedly connected to the right end of the laterally adjacent output rod 6. The input end of the motor 19 is electrically connected to the output end of the control switch 3. Through the regulation of the control switch 3, the motor 19 starts to run, and the output shaft of the motor 19 drives the cam 7 to rotate through the output rod 6. When the contact point between the cam 7 and the adjusting plate 18 changes from the centroid to the telecentricity, the cam 7 drives the pressure plate 17 to move downward through the adjusting plate 18. The pressure plate 17 drives the cutting blade 54 to move downward through the fixed plate 52, and the buffer spring 54 extends, thereby cutting the rock wool through the cutting blade 54.

[0033] Among them: it also includes a spring 11, which is respectively arranged between the right end of the connecting plate 15 and the right wall of the guide slide groove 9. The springs 11 are all sleeved on the outside of the right side of the guide slide column 10. When the cut rock wool falls into the inside of the storage groove 13, the left end of the rock wool is separated from the right end of the adjusting rod 83. The elastic force generated by the extension of the spring 11 drives the pressure plate 17 to move to the left and reset through the connecting plate 15.

[0034] Among them: it also includes a return spring 14, which is respectively arranged between the lower end of the adjustment plate 18 and the upper end of the connecting plate 15. The return spring 14 is sleeved on the outside of the upper side of the sliding column 16. The tension generated by the extension of the return spring 14 can drive the pressure plate 17 to move and reset through the adjustment plate 18.

[0035] The working principle of the double-channel rapid plate stacking device for a rock wool production line provided by the present invention is as follows: before use, the double-channel rapid plate stacking device for the rock wool production line is moved to the designated work location by an external traction device, and then the workbench is installed and docked with the corresponding workstation, so as to achieve support and fixation of the workbench 1 and the equipment above. Before use, the staff can adjust the position of the mounting seat 81, and then adjust the length of the rock wool cut. When the mounting seat 81 is close to the left wall of the protective cover 2, the length of the cut rock wool is longer, and when the mounting seat 81 is away from the left wall of the protective cover 2, the length of the cut rock wool is shorter. During operation, the rock wool is sent into the interior of the protective cover 2 by an external conveying device. When the rock wool is After the left end contacts the right end of the adjusting rod 83, the rock wool drives the push rod 82 to rotate through the adjusting rod 83. At this time, the adjusting column 87 rotates inside the limiting slide 84 and rotates relative to the limiting slide 84, so that the push rod 82 drives the cross plate 86 to move to the right. When the right end of the cross plate 86 contacts the left end of the connecting plate 15, the cross plate 86 drives the connecting plate 15 to move to the right, and the spring 11 contracts. When the connecting plate 15 moves to the upper side of the fixed plate 52, the motor 19 starts to run through the control switch 3. The output shaft of the motor 19 drives the cam 7 to rotate through the output rod 6. When the contact point between the cam 7 and the adjusting plate 18 changes from the centroid to the telecentricity, the cam 7 drives the pressure plate 1 through the adjusting plate 18. 7 moves downward, the return spring 14 contracts, the pressure plate 17 drives the cutting blade 54 to move downward through the fixed plate 52, the buffer spring 54 extends, and then the rock wool is cut by the cutting blade 54. When the contact point between the cam 7 and the adjusting plate 18 changes from the distal center to the inward center, the tension generated by the contraction of the buffer spring 54 drives the cutting blade 54 to move upward and reset through the fixed plate 52, and the fixed plate 52 drives the pressure plate 17 to move upward and reset, and the return spring 14 extends. When the cut rock wool falls into the inside of the storage groove 13, the left end of the rock wool is separated from the right end of the adjusting rod 83, and the elastic force generated by the extension of the spring 11 drives the pressure plate 17 to move left and reset through the connecting plate 15. During the movement, the connecting plate 15 drives the push rod 82 to rotate through the cross plate 86. At this time, the adjusting column 87 rotates inside the limiting slide groove 84 and rotates relative to the limiting slide groove 84, thereby driving the adjusting rod 83 to move and reset. When the pressing plate 17 moves to the left and resets, the pressing plate 17 is separated from the fixed plate 52, and then the rock wool is sent into the interior of the protective cover 2 again, so that the left end of the rock wool contacts the right end of the adjusting rod 83. Repeat the above operation to realize automatic cutting of the rock wool. The cut rock wool falls into the interior of the storage groove 13, thereby realizing rapid stacking of the rock wool. When the storage groove 13 is full, open the box door 12 and take out the stacked rock wool through external equipment.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dual-channel rapid plate stacking device for a rock wool production line, characterized by: It includes a workbench (1), a driving mechanism and an adjusting mechanism (8); Workbench (1): A receiving groove (13) is provided on the left side of the upper end thereof, a material taking port provided in the middle of the left wall of the receiving groove (13) is hingedly connected to a box door (12), a protective cover (2) is provided in the middle of the upper end of the workbench (1), a mounting cover (4) is provided on the upper end of the protective cover (2), a guide slide groove (9) is provided inside the protective cover (2), a guide slide column (10) is provided inside the guide slide groove (9), two longitudinally adjacent guide slide columns (10) are respectively slidably connected to the guide slide holes provided correspondingly at the left end of the connecting plate (15), a slide column (16) is slidably connected in the mounting groove provided at the upper end of the connecting plate (15), a pressure plate (17) is provided at the lower end of the slide column (16), and an adjustment plate (18) is provided at the upper end of the slide column (16); A cutting mechanism (5): the cutting mechanism (5) is arranged inside the protective cover (2), and the cutting mechanism (5) is located inside the mounting cover (4); the cutting mechanism (5) comprises a hexagonal sliding column (51), a fixing plate (52) and a cutting blade (53), the hexagonal sliding column (51) is slidably connected to the hexagonal sliding hole provided on the right side of the top wall of the protective cover (2), the lower end of the hexagonal sliding column (51) is provided with a cutting blade (53), the upper end of the hexagonal sliding column (51) is provided with a fixing plate (52), and the fixing plate (52) is located inside the mounting cover (4); An adjusting mechanism (8): The adjusting mechanism (8) is arranged inside the protective cover (2), and the adjusting mechanism (8) is slidably connected to the guide slide column (10) through a sliding hole provided at the right end; the adjusting mechanism (8) comprises a mounting plate (85), a transverse plate (86) and an adjusting column (87), the mounting plates (85) are slidably connected to the guide slide column (10) through the sliding holes provided at the right end, a transverse plate (86) is provided between the opposite inner sides of two longitudinally adjacent mounting plates (85), and an adjusting column (87) is provided on the left side of the two transverse plates (86) facing away from the outer side; The adjustment mechanism (8) further comprises a mounting seat (81), a push rod (82), an adjustment rod (83) and a limiting slide groove (84), wherein the mounting seat (81) is connected to the left side of the interior of the protective cover (2) by means of a fastening screw, and one end of the mounting seat (81) away from the center of the interior of the protective cover (2) is rotatably connected to the push rod (82) via a bearing, and the upper end of the push rod (82) is provided with a limiting slide groove (84), and the lower end of the push rod (82) is provided with an adjustment rod (83), and the adjustment column (87) is located inside the vertically adjacent limiting slide grooves (84).

2. A dual-channel rapid plate stacking device for a rock wool production line according to claim 1, characterized in that: It also includes a control switch (3), which is arranged at the front end of the protective cover (2), and an output end of the control switch (3) is electrically connected to an external power supply.

3. The dual-channel rapid plate stacking device for a rock wool production line according to claim 1, characterized in that: The cutting mechanism (5) further includes a buffer spring (54), which is respectively arranged between the lower end of the fixed plate (52) and the upper end of the protective cover (2). The buffer spring (54) is sleeved on the outside of the upper side of the hexagonal sliding column (51).

4. A dual-channel rapid plate stacking device for a rock wool production line according to claim 2, characterized in that: The driving mechanism comprises an output rod (6), a cam (7) and a motor (19), wherein the output rod (6) is rotatably connected to the middle portion of the right wall of the mounting cover (4) via a bearing, the cam (7) is arranged at the left end of the output rod (6), the motor (19) is arranged at the right end of the mounting cover (4), the left end of the output shaft of the motor (19) is fixedly connected to the right end of the output rod (6) adjacent to the output rod (6) in the transverse direction, and the input end of the motor (19) is electrically connected to the output end of the control switch (3).

5. The dual-channel rapid plate stacking device for a rock wool production line according to claim 1, characterized in that: It also includes a spring (11), which is respectively arranged between the right end of the connecting plate (15) and the right wall of the guide slide groove (9), and the spring (11) is sleeved on the outside of the right side of the guide slide column (10).

6. The dual-channel rapid plate stacking device for a rock wool production line according to claim 1, characterized in that: It also includes a return spring (14), which is respectively arranged between the lower end of the adjustment plate (18) and the upper end of the connecting plate (15), and the return spring (14) is sleeved on the outside of the upper side of the sliding column (16).

Images