A caliper for measuring the distance between reinforcing bars

Abstract

The utility model discloses a kind of steel bar spacing positioning measurement calipers, belong to the technical field of construction surveying tool, the calipers include caliper body and vernier slide rule slidingly installed on it, caliper body one side is fixed with fixed frame, fixed frame both ends are connected with installation frame, extension plate is slidingly connected in installation frame interior, two extension plates are fixedly connected with handle between, upper installation frame side surface is equipped with guide plate, guide plate is slidingly connected with connecting plate in, connecting plate bottom is fixed with vernier slide rule, telescopic rod is installed in connecting plate, telescopic rod end is connected with pull disc, it can drive connecting plate and vernier slide rule to move by push-pull pull disc.The utility model is flexibly adjusted measuring length by extension structure, and it is realized to the precise control of vernier slide rule at long distance with cooperation remote drive mechanism, solve the problem that steel bar in higher or narrow space is difficult to approach measurement, with the advantages of stable structure, flexible operation and convenient reading.

Description

Technical Field

[0001] This utility model relates to the field of construction surveying tools, and in particular to a caliper for measuring the spacing of reinforcing bars. Background Technology

[0002] In the construction process, the quality of rebar tying directly affects the load-bearing capacity and seismic performance of concrete structures. The uniformity and accuracy of rebar spacing are key indicators in the acceptance process. Currently, construction workers typically use measuring tapes or ordinary vernier calipers to randomly check the rebar spacing.

[0003] However, in actual construction site environments, there are often numerous measurement blind spots in special locations that are difficult for personnel to access. For example, the reinforcing bars at the bottom of beams at high altitudes, the dense reinforcing mesh in deep foundation pits, or the reinforcing structure inside narrow trenches. Workers cannot directly reach into these areas for close-range operation. Although existing measuring tools can be extended into the area to be measured by adding a simple extension rod, traditional vernier calipers require the operator to directly push the vernier slide with their fingers to clamp the object being measured. Once the calipers are moved away from the operator's hand, the operator cannot control the movement of the vernier slide. In addition, this simple extension method is often loosely structured and lacks an effective length locking and guiding mechanism, resulting in severe tool shaking during measurement. Furthermore, it is extremely difficult to read scale data in dimly lit, concealed projects, seriously affecting the efficiency of testing and the accuracy of the data.

[0004] Therefore, this utility model proposes a caliper for measuring the spacing of reinforcing bars to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology, traditional rebar spacing measuring tools have fixed lengths and rely on close-range hand operation. As a result, when dealing with rebars that are located high, far away, or in narrow spaces, they cannot extend the measuring distance or remotely drive the vernier slider for clamping and measuring. This leads to low flexibility, inconvenience in operation, and difficulty in reading measurement data. The present invention aims to provide a rebar spacing positioning and measuring caliper with an improved structure, telescopic adjustment function, and remote driving capability, which can effectively solve the above problems.

[0006] This utility model provides a caliper for measuring the spacing of reinforcing bars, which mainly includes: a caliper body, a vernier slide that is slidably installed on the outer wall of the caliper body, and a fixing frame that is fixedly connected to one side of the caliper body.

[0007] In order to achieve flexible adjustment of the measurement distance, the upper and lower ends of the fixed frame are respectively fixedly connected to the mounting frame. The two mounting frames are slidably connected to the interior of the two mounting frames. The extension plates can reciprocate linearly within the mounting frames to change the overall length of the device. In order to facilitate handheld operation and synchronously control the movement of the extension plates, the ends of the two extension plates away from the mounting frames are fixedly connected to a handle.

[0008] Furthermore, to solve the problem of remote operation of the vernier slide, a guide plate is fixedly connected to one side of the mounting frame located above. A connecting plate is slidably connected inside the guide plate. The bottom of the connecting plate extends downward and is fixedly connected to the top of the vernier slide, forming a rigid linkage structure. A drive assembly is provided inside the connecting plate. The drive assembly specifically includes a telescopic rod fixedly installed inside the connecting plate and a pull plate fixedly connected to the end of the telescopic rod away from the connecting plate. By pushing and pulling the pull plate located near the handle, the operator can drive the connecting plate to slide along the guide plate via the telescopic rod, thereby remotely driving the vernier slide to move precisely on the caliper body.

[0009] Preferably, in order to ensure the stability of the driving force transmission, the connecting plate has a fixing groove inside, the fixed end of the telescopic rod is securely installed inside the fixing groove, and the other end of the telescopic rod extends to the side where the handle is located and connects to the pulling plate, so that the pulling force can be smoothly transmitted along the axis.

[0010] Preferably, in order to prevent the extension plate from accidentally sliding and causing a change in length during the measurement process, a positioning component is provided on the upper mounting frame. The positioning component includes a spring that is vertically fixed to the top of the mounting frame and a positioning rod that passes through the inside of the spring. One end of the spring is connected to the mounting frame and the other end is connected to the positioning rod. The spring force is used to realize the automatic reset and locking of the positioning rod.

[0011] Preferably, the top of the extension plate is provided with a plurality of positioning grooves evenly distributed along its length direction, and the bottom end of the positioning rod can be adapted to be inserted into or disengaged from the positioning groove. Through multi-position locking and engagement, the extension length is fixed in stages, ensuring the structural rigidity during measurement.

[0012] Preferably, in order to further improve the smoothness of sliding and prevent the parts from falling off, an anti-detachment plate is fixedly connected inside the upper mounting frame. Correspondingly, an anti-detachment groove adapted to the anti-detachment plate is opened inside the upper extension plate. The anti-detachment plate is slidably connected inside the anti-detachment groove. This embedded guide structure effectively restricts the degree of freedom of the extension plate and avoids its lateral displacement.

[0013] Preferably, a lighting strip is fixedly installed on one side of the connecting plate, and the light-emitting surface of the lighting strip is configured to face the scale area of ​​the caliper body, so as to provide auxiliary lighting for reading in the construction environment with insufficient light and eliminate visual blind spots.

[0014] Preferably, the grip is fixedly connected between the two extension plates, and the axial direction of the grip is perpendicular to the length direction of the caliper body. This T-shaped grip structure is more ergonomic and makes it easier for the operator to apply force to pull.

[0015] Preferably, the guide plate is fixed to one side of the mounting frame located above, and the length direction of the guide plate is parallel to the length direction of the mounting frame, ensuring the consistency of the driving path and the extension path.

[0016] Preferably, the connecting plate includes a slider portion and a connecting portion, the fixing groove is formed inside the slider portion, the guide plate has a U-shaped groove structure, and the connecting plate is slidably installed in the groove of the guide plate. This fully enclosed guiding fit ensures the smoothness and precision of the remote driving process.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing rebar spacing measuring tools have a fixed length and cannot reach higher or farther rebars by setting a length extension adjustment structure consisting of a fixed frame, a mounting frame, an extension plate and a handle on the side of the caliper body. It achieves the technical effect of flexibly adjusting the measuring length according to the actual working conditions, expanding the measuring operation radius and improving the equipment's adaptability to complex construction environments.

[0018] 2. This utility model solves the problem that operators cannot directly move the vernier slide to read the value when the caliper is extended to a distance for measurement by setting up a remote drive mechanism consisting of a guide plate, a connecting plate, a telescopic rod and a pull plate, and rigidly connecting the connecting plate with the vernier slide. It achieves the technical effect that operators can remotely and accurately control the movement of the vernier slide from the handle end, realize remote clamping measurement, and improve the convenience and flexibility of measurement.

[0019] 3. This utility model solves the problem that long-distance extension structures are prone to accidental retraction or positional displacement when subjected to force by setting a positioning component including a spring and a positioning rod and a positioning groove between the mounting frame and the extension plate. It achieves the technical effect of being able to stably lock the adjusted extension length, ensuring the rigidity and stability of the overall structure during the measurement process, thereby ensuring the measurement accuracy. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of a rebar spacing positioning and measuring caliper proposed in this utility model; Figure 2 This is a side view of the structural components of a rebar spacing positioning and measuring caliper proposed in this utility model. Figure 3 This is a schematic diagram of the fixing frame structure of a rebar spacing positioning and measuring caliper proposed in this utility model; Figure 4 This is a schematic diagram of the guide plate structure of a rebar spacing positioning and measuring caliper proposed in this utility model; Figure 5 This is a schematic diagram of the fixing groove part of a rebar spacing positioning and measuring caliper proposed in this utility model.

[0021] Legend: 1. Caliper body; 2. Vernier slide; 3. Fixing bracket; 301. Mounting frame; 302. Extension plate; 303. Handle; 304. Spring; 305. Positioning rod; 306. Positioning groove; 4. Guide plate; 401. Connecting plate; 402. Fixing groove; 403. Telescopic rod; 404. Pulling plate; 5. Anti-detachment plate; 6. Anti-detachment groove; 7. Lighting strip. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 5 This utility model provides a rebar spacing positioning measuring caliper, which aims to solve the problems in the prior art where it is difficult to conveniently measure rebars located in high, far or narrow spaces due to the fixed length of the measuring tool, as well as the limited reading operation of traditional calipers.

[0024] like Figure 1 and Figure 2As shown, the rebar spacing positioning and measuring caliper is mainly constructed on a variable-length mechanical frame. Its basic measuring unit includes a long strip-shaped caliper body 1 and a vernier slide 2 sleeved on the outer wall of the caliper body 1 and slidingly engaged with it. The surface of the caliper body 1 is engraved with standard measurement scales. The vernier slide 2 moves back and forth in a straight line along the length direction on the caliper body 1 to achieve clamping and numerical reading of the rebar spacing. In order to give the caliper the ability to operate remotely, a fixing frame 3 is vertically fixedly connected to one side of the outer wall of the caliper body 1. The fixing frame 3 serves as the support base for the entire extension mechanism. Mounting frames 301 are fixedly connected to its upper and lower ends respectively. The two mounting frames 301 are parallel to each other and their extension direction is consistent with the length direction of the caliper body 1.

[0025] Each mounting frame 301 has a cavity for sliding components. An extension plate 302 is slidably connected in each cavity. The extension plate 302 moves in and out of the mounting frame 301 to change the overall grip length of the measuring device. In order to control the movement of the two extension plates 302 synchronously and provide an operating fulcrum, a grip rod 303 is fixedly connected between the ends of the two extension plates 302 away from the mounting frame 301. The grip rod 303 is a horizontally arranged cylindrical rod structure with its axis perpendicular to the length direction of the caliper body 1. The operator can pull the extension plate 302 out of the mounting frame 301 by holding the grip rod 303 and applying force backward, thereby extending the measurement distance.

[0026] like Figure 3 and Figure 4 As shown, based on the above telescopic frame, in order to achieve remote driving of the vernier slider 2, a guide plate 4 is fixedly connected to the outer wall of the upper mounting frame 301. A connecting plate 401 is slidably connected inside the guide plate 4. The bottom of the connecting plate 401 extends downward and is fixedly connected to the top of the vernier slider 2, thereby establishing a synchronous displacement relationship between the connecting plate 401 and the vernier slider 2. A fixing groove 402 is opened inside the connecting plate 401. A telescopic rod 403 is fixedly installed in the fixing groove 402. The telescopic rod 403 serves as a power transmission component. Its other end extends towards the handle 303 and is connected to a pull plate 404. The pull plate 404 is located in the operating area near the handle 303. By pushing and pulling the pull plate 404, the operator drives the connecting plate 401 to slide inside the guide plate 4 via the telescopic rod 403, thereby accurately driving the vernier slider 2 at the far end to complete the measurement action.

[0027] The top of the mounting frame 301 located above is provided with a positioning component for locking the axial position of the extension plate 302. The positioning component mainly consists of a spring 304 and a positioning rod 305. The spring 304 is vertically fixed to the top outer wall of the mounting frame 301. The positioning rod 305 passes through the central through hole of the spring 304, and the rod body of the positioning rod 305 is fixedly connected to the top end of the spring 304. A through hole is opened at the corresponding position on the top of the mounting frame 301 for the bottom end of the positioning rod 305 to pass through. Under the elastic force of the spring 304, the positioning rod 305 has a downward tendency. In cooperation with this, multiple positioning grooves 306 are evenly opened along the length direction on the top surface of the extension plate 302 located above. The diameter of the positioning grooves 306 is adapted to the bottom end size of the positioning rod 305.

[0028] During the length adjustment phase before measurement, the operator pulls the positioning rod 305 upward and compresses the spring 304, causing the bottom end of the positioning rod 305 to disengage from the positioning groove 306. At this time, the extension plate 302 is in the unlocked state and can slide freely. After adjusting to the appropriate length, the positioning rod 305 is released, and the elastic restoring force of the spring 304 presses the bottom end of the positioning rod 305 into and locks it into the corresponding positioning groove 306, thereby achieving mechanical locking between the extension plate 302 and the mounting frame 301, ensuring that the total length of the device remains constant during the measurement process.

[0029] In addition, to further enhance the mechanical rigidity of the extension structure and prevent components from falling off, an anti-detachment plate 5 is fixedly connected to the inner side wall of the upper mounting frame 301. The anti-detachment plate 5 is a raised strip extending along the length of the mounting frame 301. Correspondingly, an anti-detachment groove 6 is provided on the side wall of the upper extension plate 302, which runs through its length. The anti-detachment plate 5 is limited and slidably engaged inside the anti-detachment groove 6. This embedded guide rail structure not only restricts the vertical freedom of the extension plate 302, preventing it from swaying up and down or shifting laterally when it extends a long distance, but also acts as a physical limit to prevent the extension plate 302 from accidentally sliding out of the mounting frame 301, ensuring the stability and safety of operation.

[0030] Based on the infrastructure constructed in the above embodiments, the present invention also includes the following preferred technical solutions: As a preferred implementation method for working in low-light environments, to solve the problem of difficulty in reading scales in dark corners of construction sites, please refer to... Figure 4An illumination strip 7 is fixedly installed on one side of the outer wall of the connecting plate 401. The illumination strip 7 is arranged on the outside of the guide plate 4 and does not interfere with its sliding path. The light-emitting surface of the illumination strip 7 is configured to face the scale area of ​​the caliper body 1. The illumination strip 7 integrates a micro battery pack and an LED light source. When the operator turns on the illumination strip 7 in case of insufficient light, the beam can be directly projected to the reading interface between the vernier slider 2 and the caliper body 1, effectively eliminating blind spots and improving the accuracy and convenience of reading.

[0031] As another preferred implementation for optimizing transmission accuracy, in order to ensure a smooth and unhindered remote driving process, the main structure of the connecting plate 401 is designed as a stepped slider. Its upper part slides into the inner cavity of the guide plate 4, and its lower part extends to connect to the vernier slider 2. The fixing groove 402 is opened at the geometric center of the upper slider of the connecting plate 401, so that the push and pull force transmitted by the telescopic rod 403 can act along the guide center line, avoiding the generation of additional friction torque due to eccentric force. At the same time, the guide plate 4 is constructed as a groove with a U-shaped cross section. Its groove edge is provided with an inwardly extending limiting flange. The limiting flange covers the edge of the slider of the connecting plate 401, forming a fully enclosed guide constraint, ensuring that the connecting plate 401 can only move linearly along a single axis.

[0032] In addition, in terms of ergonomic design, the grip 303 is covered with a rubber sleeve with anti-slip texture, which increases the friction of the palm and improves the grip comfort. The edge of the pull plate 404 is designed with concave arc-shaped finger grooves, which makes it easy for the operator to hook and control the pull plate 404 back and forth with just one hand. This allows the operator to hold the grip 303 steadily with one hand when measuring the spacing of steel bars at a distance, and make fine adjustments to the pull plate 404 with their fingers, achieving a smooth and integrated operating experience.

[0033] The working principle of this utility model of a rebar spacing positioning and measuring caliper is as follows: When the location of the rebar to be measured is far away, high up, or in a narrow space, making it difficult for staff to approach directly for measurement, first adjust the overall length of the calipers according to the actual distance requirements. The operator pulls the positioning rod 305 upwards and overcomes the resistance of the spring 304, causing the bottom end of the positioning rod 305 to disengage from the positioning groove 306 at the top of the extension plate 302. At this time, the extension plate 302 is released from its locking restriction. Then, the operator holds the handle 303 and pulls it backwards, causing the extension plate 302 to slide outwards inside the mounting frame 301. During this process, the anti-disengagement plate 5 slides and guides within the anti-disengagement groove 6, ensuring the straightness and stability of the extension action and preventing skewing or jamming. When the required length is reached, the positioning rod 305 is released. Under the elastic restoring force of the spring 304, the positioning rod 305 re-engages into the corresponding positioning groove 306, completing the length fixation.

[0034] After length adjustment and locking, insert the caliper body 1 into the area to be measured and align the caliper jaws with the gap between the reinforcing bars. The operator can perform the measurement operation at the handle 303 without moving their body. By pushing and pulling the pull plate 404 located near the handle 303 with their fingers, the displacement torque of the pull plate 404 is accurately transmitted to the connecting plate 401 through the telescopic rod 403, driving the connecting plate 401 to slide along the trajectory of the guide plate 4. Since the connecting plate 401 and the vernier slide 2 are rigidly connected, the vernier slide 2 moves synchronously on the caliper body 1, thereby realizing the clamping measurement of the spacing between the reinforcing bars. If the ambient light is insufficient, turn on the lighting strip 7 to illuminate the scale area, and the operator can read the value. After the measurement is completed, operate the pull plate 404 again to reset the vernier slide 2, and the positioning component can be operated in reverse to retract the extension plate 302 to complete the equipment storage.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A caliper for measuring the spacing of reinforcing bars, comprising a caliper body (1) and a vernier slide (2) slidably mounted on the caliper body (1), wherein a fixing frame (3) is fixedly connected to one side of the caliper body (1). Its features are, The two ends of the fixed frame (3) are respectively fixedly connected to the mounting frame (301). The two mounting frames (301) are slidably connected to the interior of the two mounting frames (301). The two extension plates (302) are fixedly connected to the end away from the mounting frame (301) with a handle (303). The upper mounting frame (301) is fixedly connected to one side with a guide plate (4). The guide plate (4) is slidably connected to the interior of the guide plate (4). The bottom of the connecting plate (401) is fixedly connected to the top of the vernier slide (2). The connecting plate (401) has a fixing groove (402) inside. The fixing groove (402) is fixedly installed with a telescopic rod (403). The end of the telescopic rod (403) away from the fixing groove (402) is fixedly connected to a pull plate (404).

2. The rebar spacing positioning and measuring caliper according to claim 1, characterized in that, A positioning component is provided on the mounting frame (301) located above, the positioning component including a spring (304) fixed to the top of the mounting frame (301) and a positioning rod (305) passing through the spring (304).

3. The rebar spacing positioning and measuring caliper according to claim 2, characterized in that, One end of the spring (304) is fixedly connected to the mounting frame (301), and the other end of the spring (304) is fixedly connected to the positioning rod (305). The spring (304) is sleeved on the outer wall of the positioning rod (305).

4. A rebar spacing positioning and measuring caliper according to claim 2, characterized in that, The top of the extension plate (302) located above is provided with a plurality of positioning grooves (306) evenly distributed along its length direction, and the bottom end of the positioning rod (305) is adapted to be snapped into the interior of the positioning groove (306).

5. A rebar spacing positioning and measuring caliper according to claim 1, characterized in that, An anti-detachment plate (5) is fixedly connected inside the mounting frame (301) located above, and an anti-detachment groove (6) is opened inside the extension plate (302) located above, with the anti-detachment plate (5) slidably connected inside the anti-detachment groove (6).

6. A rebar spacing positioning and measuring caliper according to claim 1, characterized in that, A lighting strip (7) is fixedly installed on one side of the connecting plate (401). The lighting strip (7) is located on the outside of the guide plate (4) and its illumination direction is towards the scale surface of the caliper body (1).

7. A caliper for measuring the spacing of reinforcing bars according to claim 1, characterized in that, The fixing frame (3) is vertically fixed to the outer wall of the caliper body (1), and the length direction of the mounting frame (301) is parallel to the length direction of the caliper body (1).

8. A rebar spacing positioning and measuring caliper according to claim 1, characterized in that, The connecting plate (401) includes a slider part that slides with the guide plate (4) and a connecting part that connects with the vernier slider (2), and the fixing groove (402) is opened inside the slider part.

9. A rebar spacing positioning and measuring caliper according to claim 1, characterized in that, The guide plate (4) has a U-shaped groove structure, and the connecting plate (401) is slidably installed in the groove of the guide plate (4).

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