A positioning fixture for a ship level gauge

Abstract

This invention provides a positioning fixture for a ship's level gauge, comprising a first positioning marking assembly and a second positioning marking assembly disposed opposite to each other on a ship's tank. A first measuring component is mounted on the first positioning marking assembly, and a second measuring component is mounted on the second positioning marking assembly. The first measuring component emits a laser beam to illuminate the second measuring component. Using the position of the laser beam on the second measuring component as a reference, the fixture is adjusted, and finally, the position of the level gauge base plate is marked. The ship's level gauge positioning fixture provided by this invention can accurately position, measure, and mark the level gauge base plate, significantly improving the installation accuracy of the level gauge, reducing correction risks, and saving costs. The positioning fixture provided by this invention is applicable to various tank configurations, allowing some installation processes to be moved forward, improving construction quality and production efficiency, and helping to shorten the shipbuilding cycle.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically, it relates to a positioning fixture for a ship level gauge. Background Art

[0002] The traditional method for installing level gauges on large ships involves using tools such as rulers and scribing needles to measure and scribble on the tank structure to determine the position of the level gauge base plate, followed by marking, drilling, and welding of the base plate. Figure 1 As shown, however, level gauges on large ships are typically quite long, with some level gauges reaching 4-5 meters in length. The level gauge base plate 100 uses an internal threaded hole connection method, requiring high positioning accuracy. Generally, the marking and positioning error needs to be less than 2mm; otherwise, deviations in the threaded holes will affect the installation of the entire device, such as causing bolt installation tilting, unilateral stress on the internal thread, or bolts not being able to connect at all. This would necessitate cutting and repositioning the level gauge base plate 100 for welding, requiring the scaffolding to be erected twice, and the paint on the cabinet 300 to be repaired, thus impacting the construction cycle and wasting manpower and resources. Given the current shipbuilding model's rhythmic production, some projects need to be moved forward in stages, such as the positioning hole work on the cabinet being carried out during pre-outfitting. Therefore, improving production efficiency and quality is an urgent problem to be solved. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the present invention provides a positioning fixture for a ship level gauge, comprising a first positioning marking assembly and a second positioning marking assembly disposed opposite to each other on a ship's tank. A first measuring component is mounted on the first positioning marking assembly, and a second measuring component is mounted on the second positioning marking assembly. The first measuring component emits a laser beam to illuminate the second measuring component. Using the position of the laser beam illuminating the second measuring component as a reference, the fixture is adjusted, and finally, the position of the level gauge base plate is marked. The ship level gauge positioning fixture provided by the present invention can accurately position, measure, and mark the level gauge base plate, significantly improving the installation accuracy of the level gauge, reducing the risk of correction, and saving costs. The positioning fixture provided by the present invention is applicable to various tank configurations, allowing some installation processes to be moved forward, improving construction quality and production efficiency, and helping to shorten the shipbuilding cycle.

[0004] To achieve the above and other related objectives, the present invention provides a positioning fixture for a ship level gauge, comprising a positioning marking assembly, a first measuring assembly, and a second measuring assembly, wherein the positioning marking assembly includes a first marking assembly and a second marking assembly disposed opposite to each other in a first direction, and the two have the same structure;

[0005] The positioning and marking assembly includes a base, an adjusting screw, a transmission assembly, and a marking assembly. The base has a guide groove extending along a second direction, which is the length direction of the base. The adjusting screw is disposed below the guide groove along the second direction, and its two ends penetrate the sidewall of the base. The transmission assembly is fixed to one end of the adjusting screw, located on the outside of the sidewall of the base, and is used to drive the adjusting screw to move along the second direction. A locking bolt is provided on the adjusting screw, the axis of the locking bolt is along a third direction, which is perpendicular to the first direction and the second direction, and the lower end of the locking bolt is connected to the marking assembly.

[0006] The first measuring component is mounted on the first positioning marking component, connected to the upper end of the locking bolt, and located above the base. The first measuring component includes a laser rangefinder.

[0007] The second measuring component is mounted on the second positioning marking component, connected to the upper end of the locking bolt, and located above the base; the second measuring component includes an alignment member, the alignment member includes a receiving part, the receiving part is located in the plane formed by the second direction and the third direction, the side of the receiving part facing the laser rangefinder has a first scale line and a second scale line that are perpendicular to each other, wherein the first scale line is along the third direction and coincides with the axis of symmetry of the receiving part.

[0008] Optionally, the upper surface of the base has a central etched line, the central etched line is along the first direction, and the base is axially symmetrical about the central etched line.

[0009] Optionally, the positioning marking assembly further includes a magnetic suction element and a first connecting element. The base is connected to the magnetic suction element through the first connecting element. The magnetic suction element is disposed at both ends of the base along the second direction for fixing the base to the ship's cabin structure plate.

[0010] Optionally, a rolling bearing is provided in the side wall of the base, and both ends of the adjusting screw pass through the rolling bearing.

[0011] Optionally, the transmission assembly includes:

[0012] An adjusting turntable is arranged parallel to the side wall of the base, and one end of the adjusting screw passes through the center of the adjusting turntable;

[0013] A locking nut, located on the side of the adjusting disc away from the base, is used to fix the adjusting disc onto the adjusting screw.

[0014] An adjustment handle, located on the adjustment dial, is used to rotate the adjustment dial;

[0015] A positioning bolt passes through the adjusting turntable along the second direction, with one end abutting against the side wall of the base, for fixing the adjusting turntable.

[0016] Optionally, the scribing component includes:

[0017] Flange;

[0018] A positioning rod extends through the center of the flange along the third direction, and its top is connected to the lower end of the locking bolt;

[0019] Two scribing heads are symmetrically arranged on the flange and penetrate the flange along the third direction.

[0020] Optionally, the first measuring component further includes a rangefinder mounting bracket, a connecting plate, a first sliding ring, and a second connecting member. The second connecting member passes through the rangefinder mounting bracket, the connecting plate, and the first sliding ring in sequence and is fixedly connected to the locking bolt. The rangefinder mounting bracket is used to place the laser rangefinder, and the first sliding ring is located in the guide groove.

[0021] Optionally, the laser rangefinder is equipped with a level for measuring the levelness of the laser rangefinder.

[0022] Optionally, the second measuring component further includes a third connector and a second sliding ring, and the alignment component further includes a fixing part perpendicular to the receiving part. The third connector passes through the fixing part and the second sliding ring in sequence and is connected to the locking bolt, wherein the second sliding ring is located in the guide groove.

[0023] Optionally, the receiving part includes a second fixing frame and a slider, the intersection of the first scale line and the second scale line is located at the center of the slider; the second fixing frame is located on the plane formed by the second direction and the third direction, and the second fixing frame has an adjustment hole extending along the third direction to provide movement space for the slider.

[0024] The ship level gauge positioning fixture provided by this invention has at least the following beneficial effects:

[0025] 1) It can accurately position, measure and scribble the liquid level gauge base plate, so that the installation accuracy is controlled within 0mm~1mm, which significantly improves the installation accuracy of the liquid level gauge, reduces the correction risk and saves costs;

[0026] 2) Applicable to various states of the container, it allows some installation processes to be moved forward, improving construction quality and production efficiency, and helping to shorten the shipbuilding cycle;

[0027] 3) The positioning fixture provided by this invention has a reasonable design, small size, simple operation, and can be reused. Attached Figure Description

[0028] Figure 1 The diagram shown is a schematic of the installation of a level gauge in the prior art.

[0029] Figure 2a The image shown is a front view of the ship level gauge positioning fixture provided in the embodiment installed on the cabinet.

[0030] Figure 2b The image shown is a side view of the ship level gauge positioning fixture provided in the embodiment being installed on the cabinet.

[0031] Figures 3a-3b The diagram shown is a structural schematic of the first scribing component provided in the embodiment.

[0032] Figure 4 The diagram shown is a structural schematic of the laser rangefinder provided in the embodiment.

[0033] Figures 5a-5b The diagram shown is a structural schematic of the second scribe assembly provided in the embodiment.

[0034] Figures 6a-6c The diagram shows a front view, a side view, and a top view of the alignment member provided in the embodiment.

[0035] Figure 7 The diagram shows a line drawn on the tank of a ship level gauge positioning fixture provided in the embodiment.

[0036] Figure 8a The diagram shown is a horizontal application illustration of the positioning fixture for a ship level gauge provided in the embodiment.

[0037] Figure 8b The diagram shown illustrates the application of the ship level gauge positioning tool in an overhead position, as provided in the embodiment.

[0038] Component designation explanation

[0039] 100 Liquid level gauge base plate 17 Positioning rod

[0040] 200 level gauge with 18 scribing head

[0041] 300 Cabin 19 Laser Rangefinder

[0042] 400 positioning line 20 rangefinder mounting bracket

[0043] 500 Horizontal Inspection Line 21 Connecting Plate

[0044] 1 First measuring component 22 Second connecting component

[0045] 2 Second measuring component 23 Fourth connector

[0046] 3 First line drawing component 24 Display screen

[0047] 4. Second dashed component 25. Function key

[0048] 5. Base 26. First Level Instrument

[0049] 6 Adjusting screw 27 Second level

[0050] 7 Guide groove 28 Third connector

[0051] 8 Magnetic Attachment 29 Receiving Section

[0052] 9 First connecting part 30 Fixing part

[0053] 10 Rolling bearing 31 Fifth connecting piece

[0054] 11 Locking bolt 32 First scale mark

[0055] 12 Adjust the dial to the second mark 33

[0056] 13 Locking nut 34 Second fixing bracket

[0057] 14 Adjusting handle 35 Slider

[0058] 15 Positioning bolts; 36 Adjustment holes

[0059] 16 Flanges Detailed Implementation

[0060] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0061] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Although the illustrations only show components related to the present invention and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this invention, and the layout of the components may also be more complex.

[0062] Example

[0063] This embodiment provides a positioning fixture for a ship's level gauge, such as... Figures 2a-2bAs shown, it includes a positioning scribing assembly, a first measuring assembly 1, and a second measuring assembly 2, wherein the positioning scribing assembly includes a first measuring assembly in a first direction ( Figure 2a The first scribing component 3 and the second scribing component 4 are arranged opposite each other in the X-axis direction (as shown).

[0064] As an example, the first dabbing component 3 and the second dabbing component 4 have the same structural composition. This embodiment uses the first dabbing component 3 as an example to illustrate its structure. Figure 3a As shown, the first scribing assembly 3 includes a base 5, an adjusting screw 6, a transmission assembly, and a scribing assembly.

[0065] like Figure 3b As shown, the base 5 has a second direction ( Figure 3b The guide groove 7 extends along the Y-axis direction (as shown); the upper surface of the base 5 has a center scribe line (not shown in the figure), the center scribe line is along the first direction (shown in the figure). Figure 3b (as shown in the X-axis direction), and the base 5 is symmetrical about the central scribe line. Figure 3a As shown, the first marking assembly 3 also includes a magnetic suction member 8 and a first connecting member 9. The base 5 is connected to the magnetic suction member 8 via the first connecting member 9. The magnetic suction member 8 is along the second direction ( Figure 3a The Y-axis direction shown is set at both ends of the base 5 to fix the base 5 to the ship's cabin.

[0066] like Figure 3a As shown, the adjusting screw 6 moves along the second direction ( Figure 3a The adjusting screw 6 (in the Y-axis direction) is positioned below the guide groove 7, and its two ends penetrate the side wall of the base 5. Specifically, a rolling bearing 10 is provided in the side wall of the base 5, and both ends of the adjusting screw 6 pass through the rolling bearing 10. A locking bolt 11 is fixedly provided on the adjusting screw 6, and the axis of the locking bolt 11 is along the third direction (…). Figure 3a (Z-axis direction shown). As an example, the rolling bearing 10 is installed into the side wall of the base 5 by cryogenic freezing, and the diameter of the mounting hole is 0.05 mm to 0.06 mm smaller than the diameter of the rolling bearing 10, and the diameter of the adjusting screw 6 is 0.05 mm to 0.10 mm smaller than the inner diameter of the rolling bearing 10.

[0067] like Figure 3a As shown, the transmission assembly is fixed to one end of the adjusting screw 6, located on the outer side of the side wall of the base 5. As an example, the transmission assembly includes an adjusting disc 12, a locking nut 13, an adjusting handle 14, and a positioning bolt 15. The adjusting disc 12 is arranged parallel to the side wall of the base 5, and one end of the adjusting screw 6 passes through the center of the adjusting disc 12. The locking nut 13 is located on the side of the adjusting disc 12 away from the base 5, used to fix the adjusting disc 12 to the adjusting screw 6. The adjusting handle 14 is located on the adjusting disc 12, and the adjusting disc 12 can be rotated around its axis by adjusting the handle 14, thereby driving the adjusting screw 6 along the second direction (…). Figure 3a The Y-axis direction (as shown) moves, thereby causing the locking bolt 11 on the adjusting screw 6 to move along the second direction (as shown). Figure 3a The positioning bolt 15 moves along the second direction (as shown in the Y-axis direction); Figure 3a The Y-axis direction shown penetrates through the adjustment turntable 12, and one end of it abuts against the side wall of the base 5 to fix the adjustment turntable 12.

[0068] like Figure 3a As shown, the scribing assembly is fixedly connected to the lower end of the locking bolt 11. As an example, the scribing assembly includes a flange 16, a positioning rod 17, and two scribing heads 18, with the positioning rod 17 along a third direction (…). Figure 3a The Z-axis direction (as shown) penetrates the center of the flange 16, and its top is connected to the lower end of the locking bolt 11; two scribing heads 18 are symmetrically arranged on the flange 16 and along the third direction (as shown). Figure 3a The flange 16 (shown in the Z-axis direction) extends through the flange. In this embodiment, to accommodate level gauge base plates of different sizes, a flange 16 corresponding to that size can be selected.

[0069] like Figures 2a-2b As shown, the first measuring component 1 is mounted on the first positioning and marking component 3 and is located above the base 5. Figure 3a As shown, the first measuring component 1 includes a laser rangefinder 19, a rangefinder mounting bracket 20, a connecting plate 21, a first sliding ring (not shown in the figure), and a second connecting member 22. The laser rangefinder 19 is located in the rangefinder mounting bracket 20. The rangefinder mounting bracket 20 is fixedly connected to the connecting plate 21 by four fourth connecting members 23, and the fourth connecting members 23 are inserted into the guide groove 7 to prevent the rangefinder mounting bracket 20 from swaying left and right during application and causing measurement errors. The gap between the fourth connecting member 23 and the guide groove 7 is between 0 mm and 0.05 mm. The first sliding ring (not shown in the figure) is located in the guide groove 7. The second connecting member 22 passes through the rangefinder mounting bracket 20, the connecting plate 21, and the first sliding ring (not shown in the figure) in sequence, and is fixedly connected to the upper end of the locking bolt 11, thereby fixing the first measuring component 1 to the locking bolt 11. As an example, after the second connector 22 is installed, it protrudes 0.10 mm above the upper surface of the base 5, and the diameter of the first sliding ring (not shown in the figure) is 0.05 mm smaller than the width of the guide groove 7, so as to ensure that the first measuring component 1 moves along the guide groove 7 without jamming, while reducing cumulative error and improving measurement accuracy.

[0070] like Figure 4 As shown, the laser rangefinder 19 can emit a laser and measure distance. The laser rangefinder 19 is equipped with a display screen 24, function keys 25, and a level; the level includes a first level 26 and a second level 27, which are used to measure the distance of the laser rangefinder 19 in the first direction (…). Figure 4 (shown in the X-axis direction) and the second direction ( Figure 4 The levelness along the Y-axis (as shown).

[0071] like Figures 2a-2b As shown, the second measuring component 2 is mounted on the second positioning and marking component 4 and is located above the base 5. Figures 5a-5b As shown, the second measuring component 2 includes an alignment member, a third connecting member 28, and a second sliding ring (not shown in the figure), the second sliding ring (not shown in the figure) being located in the guide groove 7; combined with Figures 6a-6c As shown, the alignment member includes a receiving part 29 and a fixing part 30 that are perpendicular to each other. A third connecting member 28 passes through the fixing part 30 and the second sliding ring (not shown in the figure) in sequence and is fixedly connected to the upper end of the locking bolt 11, thereby fixing the second measuring component 2 to the locking bolt 11. As an example, the fixing part 30 is mounted on the base 5 by four fifth connecting members 31. The fifth connecting members 31 are inserted into the guide groove 7 to prevent the alignment member from wobbling left and right during application and causing measurement errors. The gap between the fifth connecting member 31 and the guide groove 7 is between 0 mm and 0.05 mm. After the third connecting member 28 is installed, it protrudes 0.10 mm above the upper surface of the base 5, and the diameter of the second sliding ring (not shown in the figure) is 0.05 mm smaller than the width of the guide groove 7 to ensure that the second measuring component 2 moves along the guide groove 7 without jamming, while reducing cumulative errors and improving measurement accuracy.

[0072] like Figures 6a-6c As shown, the receiving part 29 includes a second fixing frame 34 and a slider 35, the second fixing frame 34 being located in the second direction ( Figure 6b (shown in the Y-axis direction) and third direction (shown in the third direction) Figure 6b The second fixing frame 34 has a plane formed along the third direction (shown in the Z-axis direction), and has a plane formed along the Z-axis direction (shown in the Z-axis direction). Figure 6b The adjusting hole 36 extends along the Z-axis direction (as shown), allowing the slider 35 to move along the third direction (as shown) on the second fixing bracket 34. Figure 6b The receiver 29 moves along the Z-axis direction (as shown). As an example, the receiver 29 is positioned facing the laser rangefinder 11, and the side of the receiver 29 facing the laser rangefinder 19 has a first scale line 32 and a second scale line 33 that are perpendicular to each other, wherein the first scale line 32 moves along a third direction (as shown). Figure 6c (As shown in the Z-axis direction) and coincides with the axis of symmetry of the receiving part 29, the intersection of the first scale line 32 and the second scale line 33 is located at the center of the slider 35.

[0073] The method of using the ship level gauge positioning fixture provided in this embodiment is as follows:

[0074] First, according to the design drawings, mark the position of a level gauge base plate 100 on the cabinet 300 and mark the center line of the level gauge base plate 100. Place the first marking assembly 3 on the cabinet 300 so that the center line on the upper surface of the base 5 is aligned with the center line.

[0075] Next, adjust the rangefinder mounting bracket 20 through the fourth connector 23 to adjust the level of the first measuring component 1 until the first level 26 and the second level 27 on the laser rangefinder 19 show that the level has been reached; after confirming that there is no error, turn on the switch of the magnetic attachment 8 so that the tooling is attached to the cabinet 300.

[0076] Next, based on the center line and the measuring tape, the position of the second marking assembly 4 is initially determined, and the laser rangefinder 19 is turned on. The laser rangefinder 19 emits a laser beam that illuminates the receiving unit 29; the transmission assembly on the second marking assembly 4 causes the second measuring assembly 2 to move along the second direction ( Figure 2a Move the slider 35 (in the Y-axis direction) until the laser irradiates the first scale line 32; fix the position of the slider 35 by moving the slider 35 in the adjustment hole 36 so that the laser irradiates the intersection of the first scale line 32 and the second scale line 33; after confirming that there is no error, lock the adjustment turntable 12 by the positioning bolt 15.

[0077] Next, measurements are taken using the laser rangefinder 19 to check if the installation dimensions are correct. After confirming that there are no errors, the flange 16 is rotated left and right. Figure 7 As shown, the scribing head 18 scribing a positioning line 400 on the compartment 300, and in addition, a transverse inspection line 500 is scribing along the edge of the base 5 of the second scribing assembly 4 near the edge of the first scribing assembly 3.

[0078] Finally, the positioning fixture for the ship's level gauge was removed, all segments were connected and completed, and a center punch was used to mark the connection before proceeding with subsequent work.

[0079] It should be noted that, as Figures 8a-8b As shown, when the container 300 is in a supine or horizontal position, the measurement, positioning, and marking can also be performed using the above method.

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A positioning fixture for a ship's liquid level gauge, characterized in that, It includes a positioning scribing component, a first measuring component, and a second measuring component, wherein the positioning scribing component includes a first scribing component and a second scribing component disposed opposite to each other in a first direction, and the two have the same structure; Both the first and second scribing components include a base, an adjusting screw, a transmission component, and a scribing assembly. The base has a guide groove extending along a second direction, which is the length direction of the base. The adjusting screw is disposed below the guide groove along the second direction, and its two ends penetrate the sidewall of the base. The transmission component is fixed to one end of the adjusting screw, located on the outside of the sidewall of the base, and is used to drive the adjusting screw to move along the second direction. A locking bolt is provided on the adjusting screw, the axis of which is along a third direction, which is perpendicular to the first and second directions, and the lower end of the locking bolt is connected to the scribing assembly. The first measuring component is mounted on the first scribing component, connected to the upper end of the locking bolt, and located above the base. The first measuring component includes a laser rangefinder. The second measuring component is mounted on the second scribing component, connected to the upper end of the locking bolt, and located above the base; the second measuring component includes an alignment member, the alignment member includes a receiving part, the receiving part is located in the plane formed by the second direction and the third direction, the side of the receiving part facing the laser rangefinder has a first scale line and a second scale line that are perpendicular to each other, wherein the first scale line is along the third direction and coincides with the axis of symmetry of the receiving part.

2. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The upper surface of the base has a central engraving line, which is along the first direction, and the base is symmetrical about the central engraving line.

3. The positioning fixture for a ship level gauge according to claim 1, characterized in that, Both the first marking assembly and the second marking assembly include a magnetic suction element and a first connecting element. The base is connected to the magnetic suction element through the first connecting element. The magnetic suction element is arranged at both ends of the base along the second direction for fixing the base to the ship's cabin structure plate.

4. The positioning fixture for a ship level gauge according to claim 1, characterized in that, A rolling bearing is provided in the side wall of the base, and both ends of the adjusting screw pass through the rolling bearing.

5. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The transmission assembly includes: An adjusting turntable is arranged parallel to the side wall of the base, and one end of the adjusting screw passes through the center of the adjusting turntable; A locking nut, located on the side of the adjusting disc away from the base, is used to fix the adjusting disc onto the adjusting screw. An adjustment handle, located on the adjustment dial, is used to rotate the adjustment dial; A positioning bolt passes through the adjusting turntable along the second direction, with one end abutting against the side wall of the base, for fixing the adjusting turntable.

6. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The marking component includes: Flange; A positioning rod extends through the center of the flange along the third direction, and its top is connected to the lower end of the locking bolt; Two scribing heads are symmetrically arranged on the flange and penetrate the flange along the third direction.

7. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The first measuring component further includes a rangefinder mounting bracket, a connecting plate, a first sliding ring, and a second connecting member. The second connecting member passes through the rangefinder mounting bracket, the connecting plate, and the first sliding ring in sequence and is fixedly connected to the locking bolt. The rangefinder mounting bracket is used to place the laser rangefinder, and the first sliding ring is located in the guide groove.

8. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The laser rangefinder is equipped with a level for measuring the levelness of the laser rangefinder.

9. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The second measuring component further includes a third connector and a second sliding ring. The alignment component also includes a fixing part perpendicular to the receiving part. The third connector passes through the fixing part and the second sliding ring in sequence and is connected to the locking bolt. The second sliding ring is located in the guide groove.

10. The positioning fixture for a ship level gauge according to claim 1, characterized in that, The receiving part includes a second fixing frame and a slider. The intersection of the first scale line and the second scale line is located at the center of the slider. The second fixing frame is located on the plane formed by the second direction and the third direction. The second fixing frame has an adjustment hole extending along the third direction to provide movement space for the slider.

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