Land planning drawing zoom comparison device

Abstract

The utility model relates to the technical field of land planning tools, in particular to a land planning drawing scaling comparison device which comprises a base and a transparent plate, a sliding rail is fixed to the front side of the top of the base, two sliding blocks are connected to the surface of the sliding rail in a sliding mode, the tops of the sliding blocks on the two sides are jointly and detachably connected with a scaling ruler, and the scaling ruler is fixed to the base. Scales matched with the drawing proportion are arranged on the surface of the scaling ruler, scale marks are arranged on the front side of the top of the transparent plate, grid lines are arranged on the surface of the transparent plate, four L-shaped drawing positioning baffles are fixed to the top of the base, guide plates are fixed to the surfaces of the front side and the rear side of the base correspondingly, and two C-shaped plates are slidably connected to the surfaces of the guide plates. A lead screw penetrates through the surface of the C-shaped plate in a threaded mode, a clamping plate is rotationally connected to the bottom of the lead screw, and a buffering pad is fixed to the bottom of the clamping plate. According to the device, all the assemblies work cooperatively, and it is ensured that the device stably, accurately and conveniently completes the scaling comparison task of the land planning drawing.

Description

Technical Field

[0001] This utility model relates to the field of land planning tools, specifically a land planning map scaling and comparison device. Background Technology

[0002] During the land planning process, maps of various scales are generated at different stages. For example, the early macro-regional planning maps are at a smaller scale, while the later detailed construction planning maps are at a larger scale. When it is necessary to compare and analyze these maps of different scales, such as comparing changes in land use layout and differences in facility distribution, directly viewing the original maps often makes it difficult to intuitively and accurately grasp the details of the differences.

[0003] Traditional paper-based map comparisons are performed using manual measuring tools combined with scaling conversions. However, this method is inefficient and prone to significant errors, failing to meet the demand for efficient and accurate scaling comparisons of land planning maps. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model proposes a land planning map scaling and comparison device to solve the problems mentioned above.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A land planning drawing scaling and comparison device includes a base and a transparent plate. A slide rail is fixed to the top front side of the base, and two sliders are slidably connected to the surface of the slide rail. A scaling ruler is detachably connected to the top of both sliders. The scaling ruler has scales on its surface that match the drawing scale. The transparent plate has scale lines on its top front side and grid lines on its surface. Four L-shaped drawing positioning baffles are fixed to the top of the base. Guide plates are fixed to the front and rear surfaces of the base. Two C-shaped plates are slidably connected to the surface of the guide plates. A lead screw is threaded through the surface of the C-shaped plates. A clamping plate is rotatably connected to the bottom of the lead screw, and a buffer pad is fixed to the bottom of the clamping plate.

[0007] Preferably, a U-shaped plate is fixed to the surface of the C-shaped plate, and a first shank bolt is threaded through the surface of the U-shaped plate. Both the guide plate and the C-shaped plate have positioning grooves for the placement of the positioning block, and the guide plate has multiple positioning grooves.

[0008] Preferably, two guide rods slide through the surface of the C-shaped plate, and the bottom of the guide rods is fixedly connected to the top of the clamping plate.

[0009] Preferably, the scaling ruler has threaded holes on both sides and the top of the slider, and the slider and the scaling ruler are detachably connected by bolts through the threaded holes.

[0010] Preferably, an extension block is fixed to the front surface of the slider, and a second shank bolt is threaded through the surface of the extension block, with a rubber pad fixed to the bottom of the second shank bolt.

[0011] Preferably, a light-emitting backplate is fixed to the top of the base.

[0012] Preferably, one end of the positioning block has a semi-circular structure design, and the edge of the positioning groove has a chamfered structure design.

[0013] Compared with the prior art, the beneficial effects of this utility model's land planning map scaling and comparison device are:

[0014] First, the base provides stable support for the entire device. The sliders on both sides can slide on the surface of the slide rail and are fixed by a detachable connection. The detachable connection of the scaling ruler makes it easy to replace the ruler with different scales according to actual needs, adapting to the comparison of drawings of different scales. The slider drives the scaling ruler to move, realizing the scaling comparison function. The scaling ruler surface has scales that match the scale of the drawing, used for accurate measurement and comparison of the length of drawing elements. The scale lines and grid lines on the transparent plate assist in the comparison and help determine the positional relationship of drawing elements. The L-shaped drawing positioning baffle on the base is used for preliminary positioning of the drawing. The guide plate, C-shaped plate, lead screw, clamping plate and buffer pad form a clamping assembly. By sliding the C-shaped plate and rotating the lead screw, the clamping plate and the buffer pad are engaged to fix the position of the drawing and the transparent plate, ensuring the stability of the comparison process.

[0015] Secondly, the U-shaped plate on the C-shaped plate cooperates with the first shank bolt to fix the position of the C-shaped plate on the guide plate. Rotating the first shank bolt can allow the positioning block to enter the positioning groove, which is used to quickly position and fix the position of the clamping component, thereby adapting to the positioning requirements of drawings of different sizes and positions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the base structure in this utility model;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the C-shaped plate in this utility model;

[0020] Figure 5 This is a schematic diagram of the transparent plate in this utility model;

[0021] Figure 6 This is a partial structural schematic diagram of the present invention.

[0022] The components include: 1. Base; 2. Slide rail; 3. Slider; 4. Scale; 5. Transparent plate; 6. Scale lines; 7. Grid lines; 8. L-shaped drawing positioning baffle; 9. Guide plate; 10. C-shaped plate; 11. Lead screw; 12. Clamping plate; 13. Guide rod; 14. Buffer pad; 15. U-shaped plate; 16. First bolt with handle; 17. Positioning block; 18. Positioning groove; 19. Light-emitting back plate; 20. Extension block; 21. Second bolt with handle; 22. Rubber pad; 23. Threaded hole. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0024] For a land planning map scaling and comparison device according to this specific implementation, please refer to [link / reference]. Figures 1-6 The system includes a base 1 and a transparent plate 5. A slide rail 2 is fixed to the top front side of the base 1. Two sliders 3 are slidably connected to the surface of the slide rail 2. A scaling ruler 4 is detachably connected to the top of both sliders 3. The scaling ruler 4 has scales on its surface that match the drawing scale. A scale line 6 is set on the top front side of the transparent plate 5. A grid line 7 is set on the surface of the transparent plate 5. Four L-shaped drawing positioning baffles 8 are fixed to the top of the base 1. Guide plates 9 are fixed to the front and rear sides of the base 1. Two C-shaped plates 10 are slidably connected to the surface of the guide plates 9. A lead screw 11 is threaded through the surface of the C-shaped plates 10. A clamping plate 12 is rotatably connected to the bottom of the lead screw 11. A buffer pad 14 is fixed to the bottom of the clamping plate 12.

[0025] Through the above technical solution, the base 1 provides stable support for the entire device, the sliders 3 on both sides can slide on the surface of the slide rail 2, and the scaling ruler 4 is fixed by a detachable connection. The detachable scaling ruler 4 makes it easy to replace the ruler with different scales according to actual needs, adapting to the comparison of drawings of different scales. The sliders 3 drive the scaling ruler 4 to move, realizing the scaling comparison function. The scaling ruler 4 has scales that match the scale of the drawing, used to accurately measure and compare the length of the drawing elements. The scale lines 6 and grid lines 7 on the transparent plate 5 assist in the comparison and help determine the positional relationship of the drawing elements. The L-shaped drawing positioning baffle 8 on the base 1 is used for preliminary positioning of the drawing. The guide plate 9, C-shaped plate 10, lead screw 11, clamping plate 12 and buffer pad 14 form a clamping assembly. By sliding the C-shaped plate 10 and rotating the lead screw 11, the clamping plate 12 and the buffer pad 14 are made to cooperate, fixing the position of the drawing and the transparent plate 5, ensuring the stability of the comparison process.

[0026] A U-shaped plate 15 is fixed to the surface of the C-shaped plate 10. A first shank bolt 16 is threaded through the surface of the U-shaped plate 15. Both the guide plate 9 and the C-shaped plate 10 have positioning grooves 18 for the placement of the positioning block 17. There are multiple positioning grooves 18 on the surface of the guide plate 9.

[0027] Through the above technical solution, the U-shaped plate 15 on the C-shaped plate 10 cooperates with the first shank bolt 16 to fix the position of the C-shaped plate 10 on the guide plate 9. Rotating the first shank bolt 16 can make the positioning block 17 enter the positioning groove 18 for quick positioning and fixing of the clamping component, thereby adapting to the positioning requirements of drawings of different sizes and positions.

[0028] Two guide rods 13 slide through the surface of the C-shaped plate 10, and the bottom of the guide rods 13 are fixedly connected to the top of the clamping plate 12.

[0029] Through the above technical solution, when sliding the C-shaped plate 10 and rotating the lead screw 11, the guide rod 13 plays a guiding role, ensuring the linear movement of the clamping plate 12 during the movement process, and preventing the clamping plate 12 from deflecting when applying pressure to fix the drawing.

[0030] The scaling ruler 4 has threaded holes 23 on both sides and the top of the slider 3. The slider 3 and the scaling ruler 4 are detachably connected by bolts through the threaded holes 23.

[0031] Through the above technical solution, this connection method makes the installation and disassembly of the scaling ruler 4 simple and quick. In actual use, according to the scale requirements of the drawing, different scales of the scaling ruler 4 can be selected and fixed to the slider 3 by bolts. When the scaling ruler 4 needs to be replaced, simply loosen the bolts, remove the old scaling ruler 4, replace it with a suitable new scaling ruler 4, and then tighten the bolts to complete the replacement. The operation is convenient.

[0032] An extension block 20 is fixed to the front surface of the slider 3. A second shank bolt 21 is threaded through the surface of the extension block 20. A rubber pad 22 is fixed to the bottom of the second shank bolt 21.

[0033] With the above technical solution, when the second shank bolt 21 is rotated, the rubber pad 22 at its bottom contacts the surface of the base 1, generating friction, thereby positioning the slider 3 and preventing the scaling ruler 4 from moving during recording.

[0034] A light-emitting backplate 19 is fixed to the top of the base 1.

[0035] Through the above technical solution, the setting of the light-emitting backplate 19 improves the applicability of the device under different lighting conditions. It ensures the clarity of the drawing content in low light environment, reduces the error caused by operator eye fatigue, and improves work quality and efficiency.

[0036] The positioning block 17 has a semi-circular structure at one end, and the positioning groove 18 has a chamfered edge.

[0037] Through the above technical solution, one end of the positioning block 17 has a semi-circular structure, which makes it easy to insert into the positioning groove 18. The edge of the positioning groove 18 is designed with a chamfer structure to facilitate the placement of the positioning block 17, thereby improving positioning accuracy and ease of operation.

[0038] Its working principle is as follows: In the initial stage, two drawings to be compared are laid flat on the base 1. The L-shaped drawing positioning baffle 8 is used to initially calibrate the position of the drawings. Then, a transparent plate 5 is covered. With the help of the clamping assembly consisting of the guide plate 9, C-shaped plate 10, lead screw 11, clamping plate 12 and buffer pad 14, pressure is applied to fix the drawings and the transparent plate 5. Then, the scaling comparison stage begins. The operator holds the slider 3 and slides it along the slide rail 2 to move the scaling ruler 4 to the target position. At this time, the relative position of the scale of the scaling ruler 4 with the scale line 6 and grid line 7 on the transparent plate 5 is observed to measure the length difference of the drawing elements and calculate the scaling ratio. If the light is dim, the light-emitting back plate 19 will immediately supplement the light to ensure that the content of the drawing is clearly distinguishable. The positioning block 17 and the positioning groove 18 cooperate with each other to achieve accurate and fast positioning and fixation of the clamping assembly. The whole device ensures that the device can stably, accurately and conveniently complete the scaling comparison task of land planning drawings through the coordinated operation of each component.

[0039] Furthermore, the specific calculation method for the scaling ratio is as follows: After fixing drawing A and drawing B and covering them with transparent plate 5, first determine a key element on the drawing that needs to be compared, such as the boundary of a road or a plot of land. Then, move slider 3 to move scaling ruler 4 until a certain starting scale setting a on scaling ruler 4 is aligned with the corresponding starting scale line 6 on transparent plate 5. At this time, the grid lines 7 on transparent plate 5 can help to determine the starting position more accurately. For example, observe that the starting point of the road is exactly located at a grid intersection, and this intersection corresponds to the starting scale of transparent plate 5 and scaling ruler 4.

[0040] Next, measure the length of this key element on drawing A and observe the position of its endpoint on transparent plate 5. The corresponding value on scale line 6 of transparent plate 5 is x, and the corresponding scale on scaling ruler 4 is b. Similarly, measure the length of the same key element on drawing B. The value of its endpoint on scale line 6 of transparent plate 5 is y, and the corresponding scale on scaling ruler 4 is c.

[0041] Assuming the transparent plate 5 and the scaling ruler 4 have the same scale unit, the length of this element on drawing A is b - a units, and the length of this element on drawing B is c - a units. Therefore, the scaling ratio of drawing B relative to drawing A can be calculated by the ratio of their lengths, which is [c - a / b - a]. For example, if the difference in scale on scaling ruler 4 corresponding to the length measured on drawing A is 10 units, and the difference in scale on scaling ruler 4 corresponding to the length measured on drawing B is 5 units, then the scaling ratio of drawing B relative to drawing A is 5:10, or 1:2.

[0042] In this way, by using the scaling ruler 4 and the scale lines 6 and grid lines 7 on the transparent plate 5, the scaling ratio of the same elements on the two drawings can be accurately calculated, thereby achieving precise scaling and comparison of land planning drawings.

[0043] It should be noted that, although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A land planning map scaling and comparison device, characterized in that: Includes a base (1) and a transparent plate (5). A slide rail (2) is fixed on the front top of the base (1). Two sliders (3) are slidably connected to the surface of the slide rail (2). A scaling ruler (4) is detachably connected to the top of the sliders (3) on both sides. The scaling ruler (4) has a scale that matches the drawing scale. A scale line (6) is provided on the front top of the transparent plate (5). A grid line (7) is provided on the surface of the transparent plate (5). Four L-shaped drawing positioning baffles (8) are fixed on the top of the base (1). Guide plates (9) are fixed on both the front and rear surfaces of the base (1). Two C-shaped plates (10) are slidably connected to the surface of the guide plates (9). A lead screw (11) is threaded through the surface of the C-shaped plates (10). A clamping plate (12) is rotatably connected to the bottom of the lead screw (11). A buffer pad (14) is fixed to the bottom of the clamping plate (12).

2. The land planning map scaling and comparison device according to claim 1, characterized in that: A U-shaped plate (15) is fixed on the surface of the C-shaped plate (10). A first shank bolt (16) is threaded through the surface of the U-shaped plate (15). The guide plate (9) and the C-shaped plate (10) are both provided with positioning grooves (18) for the positioning block (17) to be placed. The guide plate (9) has multiple positioning grooves (18).

3. The land planning map scaling and comparison device according to claim 1, characterized in that: Two guide rods (13) slide through the surface of the C-shaped plate (10), and the bottom of the guide rods (13) is fixedly connected to the top of the clamping plate (12).

4. The land planning map scaling and comparison device according to claim 1, characterized in that: The scaling ruler (4) and the top of the slider (3) are provided with threaded holes (23). The slider (3) and the scaling ruler (4) are detachably connected by bolts through the threaded holes (23).

5. A land planning map scaling and comparison device according to claim 1, characterized in that: An extension block (20) is fixed to the front surface of the slider (3), and a second shank bolt (21) is threaded through the surface of the extension block (20). A rubber pad (22) is fixed to the bottom of the second shank bolt (21).

6. The land planning map scaling and comparison device according to claim 1, characterized in that: The base (1) has a light-emitting backplate (19) fixed on top.

7. A land planning map scaling and comparison device according to claim 2, characterized in that: The positioning block (17) has a semi-circular structure at one end, and the positioning groove (18) has a chamfered edge.

Images