Tunnel grating steel frame machining main reinforcement positioning die

Abstract

The application belongs to the technical field of tunnel construction positioning mold, in particular to a tunnel grid steel frame processing main reinforcement positioning mold, which comprises: multiple pairs of interval distributed supports, two supports in each pair of supports are distributed in an up-down manner, the top end of the vertical part of the support is connected to the front end of the bottom of the horizontal part thereof; a slide is fixedly installed at the bottom of the front side of the vertical part of the support, the rear end of the slide is flush, and the front end of the slide is distributed in an arc shape; a positioning plate is slidingly arranged in the slide, the upper surface of the positioning plate is provided with two positioning grooves for accommodating main reinforcements; a displacement frame has two front ends respectively connected with two positioning plates corresponding to each pair of supports; a first oil cylinder is provided in one-to-one correspondence with the displacement frame and is installed at the rear side of the support, and the extending end of the first oil cylinder is connected with the vertical part of the displacement frame. The application can improve the tunnel grid steel frame processing efficiency and forming quality, reduce the difficulty of manual operation, and solve the defects of the existing technology, such as complex operation process, time and labor consumption, and poor finished product effect.

Description

Technical Field

[0001] This invention relates to the field of positioning mold technology for tunnel construction; specifically, this invention relates to a positioning mold for the main reinforcement bars of a tunnel grid steel frame. Background Technology

[0002] During tunnel construction, some sections require the use of steel reinforcement to create a grid steel frame, which consists of four main reinforcing bars with "butterfly reinforcing bars" welded in the middle. The overall steel frame is an arc-shaped structure. However, the position of the "butterfly reinforcing bars" is difficult to control during the welding process with the main reinforcing bars, resulting in inaccurate curvature of the steel frame and inability to fix the main reinforcing bars. This leads to a poor overall appearance of the grid steel frame and failure to meet quality standards.

[0003] The production of grating steel frames is inefficient, requires additional personnel to assist in fixing the position of the main reinforcement bars, and the reinforcement bars will deform due to the influence of metal memory after pre-bending. The actual production process is complicated, time-consuming and labor-intensive, and the finished product is of poor quality. Summary of the Invention

[0004] In view of this, the present invention provides a positioning mold for the main reinforcement of the tunnel grid steel frame, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0005] To achieve the aforementioned objectives, the present invention provides a positioning mold for main reinforcement bars in tunnel grating steel frame processing, comprising: multiple pairs of spaced-apart supports, with two supports in each pair arranged vertically, the top end of the vertical portion of each support connected to the front end of the bottom of its horizontal portion; a slide rail fixedly installed at the bottom of the front side of the vertical portion of the support, the rear end of the slide rail being flush with the front end of the slide rail being arc-shaped; and a positioning plate slidably disposed within the slide rail, the upper surface of the positioning plate being flush with the upper surface of the horizontal portion of the support, and the upper surface of the positioning plate being provided with two accommodating main reinforcement bars. Positioning groove; displacement frame, including two front ends, and the two front ends of the displacement frame are respectively connected to the two positioning plates corresponding to each pair of brackets, which can drive the two positioning plates to move synchronously; first hydraulic cylinder, which is arranged in a one-to-one correspondence with the displacement frame and installed on the rear side of the bracket, and the extended end of the first hydraulic cylinder is connected to the vertical part of the displacement frame; when the positioning plate is located at the front end of the slide, the upper surface of the bracket forms a storage area in the front area of ​​the displacement frame that can store the main reinforcement, and the front end of the top of the bracket forms a channel opening that allows the main reinforcement in the storage area to pass through.

[0006] In the aforementioned positioning mold for main reinforcement of tunnel grid steel frame processing, optionally, a wedge plate is provided on the support, the lower surface of the wedge plate is flat and slides in cooperation with the upper surface of the support, and the main reinforcement in the storage area is located on the upper surface of the wedge plate; when the wedge plate is in the foremost position, its tip and tail are flush with the front end of the positioning plate and the rear end of the storage area, respectively; when the wedge plate is in the rearmost position, its tip is located on the upper surface of the positioning plate and the two positioning grooves are exposed.

[0007] In the aforementioned tunnel grating steel frame processing main reinforcement positioning mold, optionally, a comb-shaped frame capable of driving the wedge plate to move back and forth is slidably installed on the support, and a second hydraulic cylinder is connected to the rear side of the comb-shaped frame, the second hydraulic cylinder being installed on the support located above.

[0008] In the aforementioned tunnel grid steel frame processing main reinforcement positioning mold, optionally, irregularly shaped rods are fixedly installed on the supports on both sides, and vertical baffles are provided on the outer sides of the two pairs of positioning plates on both sides. The vertical baffles are installed on the irregularly shaped rods, and the vertical baffles are located between the front end of the positioning plate and the front positioning groove in the front direction to prevent the main reinforcement from falling off the front end of the top of the positioning plate.

[0009] In the aforementioned tunnel grid steel frame processing main reinforcement positioning mold, optionally, the irregular rod includes a front vertical section and a rear vertical section distributed front and rear, a transverse baffle is fixedly provided on the top of the rear side of the vertical baffle, the transverse baffle is slidably installed on the front vertical section in the height direction, the rear vertical section is located at the rear end of the storage area, and the front vertical section and the rear vertical section are located on the outer and inner sides of the end of the main reinforcement in the length direction of the main reinforcement, respectively.

[0010] In the aforementioned tunnel grating steel frame processing main reinforcement positioning mold, optionally, the positioning plate includes: a main body, slidably mounted on the slide rail; a groove, disposed on the top of the main body, the inner bottom wall of the groove including a first surface, a second surface, and a third surface connected sequentially from front to back, the first surface being used to support the main reinforcement, the second surface being an inclined surface sloping downward at the rear end, and the third surface being a plane; a lifting plate, movably disposed within the main body, having an "L"-shaped notch on its rear side; when the lifting plate is in its highest position, its front side and the notch respectively form two positioning grooves with the inner walls of the front and rear grooves, and the main reinforcement located in the rear positioning groove is supported by the inner bottom wall of the notch; when the lifting plate is in its lowest position, its top height is less than the height of the second surface, and the width of the third surface is less than the width of the positioning groove.

[0011] In the aforementioned tunnel grid steel frame processing main reinforcement positioning mold, optionally, the first surface includes a first planar portion located on the front side, an arc-shaped portion whose front end is connected to the rear end of the first planar portion and whose tail end extends upward along an arc-shaped trajectory, and a second planar portion whose front end is connected to the tail end of the arc-shaped portion and whose tail end is connected to the front end of the second surface.

[0012] In the aforementioned positioning mold for the main reinforcement of a tunnel grating steel frame, optionally, a sliding plate that can slide back and forth is provided at the bottom of the main body. The rear end of the sliding plate is fixedly connected to the displacement frame. The rear end of the bottom of the lifting plate and the front end of the top of the sliding plate are provided with matching inclined surfaces. When the sliding plate passes the bottom of the lifting plate from back to front, it pushes the lifting plate to the highest position and supports it at the bottom of the lifting plate. When the sliding plate is located at the rearmost position on the main body, the sliding plate is located on the rear side of the lifting plate and can pull the positioning plate backward.

[0013] In the aforementioned positioning mold for the main reinforcement of a tunnel grating steel frame, optionally, the support is provided with a liftable stop block, the stop block is "L" shaped, the width of the lateral portion of the stop block is greater than the width of the positioning groove, and a roller is rotatably mounted on the front end face of the lateral portion of the stop block. A liftable top rod is slidably provided at the front end of the main body, and the rear side of the bottom end of the top rod is configured to match the inclined surface of the sliding plate. When the sliding plate moves forward to the foremost position on the positioning plate, the front end of the sliding plate pushes the top rod to the highest position, and when the top rod is at the highest position, its top end supports the stop block at a position with a height greater than the front end of the main body.

[0014] In the aforementioned positioning mold for the main reinforcement of a tunnel grating steel frame, optionally, the sliding plate is provided with a strip groove inside, and the main body is provided with a limiting block that passes through the strip groove inside, and when the sliding plate is located at the rearmost position on the main body, the front end face of the strip groove contacts the front side face of the limiting block.

[0015] The beneficial effects of this invention are:

[0016] 1. It is made of steel plates and structural steel, and can be processed and manufactured in the steel reinforcement yard.

[0017] 2. It can directly cold bend the main reinforcement bars without considering the curvature or pre-bending the reinforcement bars, and can be operated by a single person.

[0018] 3. The main reinforcement is fixed to the positioning plate, and the structure including the connecting plate is welded in one go to directly produce the finished grating steel frame.

[0019] 4. Single-person operation reduces pre-bending steps, eliminates the need for repeated adjustments to the rebar position, resulting in high construction efficiency and beautiful, straight finished product lines.

[0020] 5. The construction is highly standardized, the site is clean and the process is standardized, the quality is greatly improved, it can be carried out around the clock, the investment cost is low, and the processing materials are easy to obtain.

[0021] 6. It can achieve active feeding and positioning of the four main ribs, and the whole process is highly automated, which greatly improves the processing efficiency of the grating steel frame. Attached Figure Description

[0022] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the tunnel grid steel frame processing main reinforcement positioning mold in Embodiment 1 of the present invention when the first oil cylinder is extended and the positioning plates are distributed in a "I" shape at the end of the slide.

[0024] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the overall structure of the main reinforcement positioning mold for processing tunnel grid steel frame according to Embodiment 1 of the present invention, in which the positioning plate is located at the front end of the slide.

[0026] Figure 4 For the present invention Figure 3 Enlarged view at point B in the middle;

[0027] Figure 5 For the present invention Figure 3 The front view;

[0028] Figure 6 This is a schematic diagram of the overall structure of the tunnel grid steel frame processing main reinforcement positioning mold in Embodiment 2 of the present invention when the first oil cylinder is extended and the positioning plates are distributed in a "I" shape at the end of the slide.

[0029] Figure 7 For the present invention Figure 6 Enlarged view at point C;

[0030] Figure 8 For the present invention Figure 6 The front view;

[0031] Figure 9 This is a schematic diagram of the overall structure of the tunnel grid steel frame processing main reinforcement positioning mold in Embodiment 3 of the present invention when the first oil cylinder is extended and the positioning plates are distributed in a "I" shape at the end of the slide.

[0032] Figure 10 For the present invention Figure 9 Enlarged view at point D;

[0033] Figure 11 For the present invention Figure 9 The front view;

[0034] Figure 12 For the present invention Figure 11 Enlarged view at point E in the middle;

[0035] Figure 13 This is a schematic diagram of the overall structure of the tunnel grid steel frame processing main reinforcement positioning mold in Embodiment 4 of the present invention when the first oil cylinder is extended and the positioning plates are distributed in a "I" shape at the end of the slide.

[0036] Figure 14 For the present invention Figure 13 Enlarged view at point F;

[0037] Figure 15 For the present invention Figure 13 The front view;

[0038] Figure 16 For the present invention Figure 15 Enlarged view at point G;

[0039] Figure 17 For the present invention Figure 16 A partial schematic diagram;

[0040] Figure 18 This is a schematic diagram of the positioning plate and sliding plate in Embodiment 4 of the present invention;

[0041] Figure 19 For the present invention Figure 18 A breakdown diagram.

[0042] Figure label:

[0043] 1-Bracket; 2-Slide rail;

[0044] 3-Positioning plate; 3.1-Main body; 3.2-Groove;

[0045] 3.3 - First surface; 3.3a - First planar portion; 3.3b - Curved portion; 3.3c - Second planar portion;

[0046] 3.4 - Second side; 3.5 - Third side; 3.6 - Lifting plate; 3.7 - Notch;

[0047] 4-Positioning groove; 5-Displacement frame; 6-First hydraulic cylinder; 7-Storage area; 8-Channel opening; 9-Wedge plate; 10-Comb-shaped frame; 11-Second hydraulic cylinder;

[0048] 12 - Special - shaped rod; 12.1 - Front vertical section; 12.2 - Rear vertical section;

[0049] 13 - Vertical baffle; 14 - Horizontal baffle; 15 - Sliding plate; 16 - Stopper; 17 - Thrust rod; 18 - Strip - shaped groove; 19 - Limit block; 20 - Support frame; 21 - Support leg. Specific implementation mode

[0050] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] Please refer to Figures 1 to 5 , the main - bar positioning die for processing tunnel grid steel frames in the first embodiment includes:

[0052] Multiple pairs of brackets 1 distributed at intervals, the brackets 1 are in an "L" shape, and the two brackets 1 within each pair of brackets 1 are distributed vertically. The top of the vertical part of the bracket 1 is connected to the front end of the bottom of its horizontal part; the tails of the brackets 1 are commonly connected to a support frame 20, and the support frame 20 and all the brackets 1 form a stable whole by welding.

[0053] Slides 2, fixedly installed at the bottom of the front side of the vertical part of the bracket 1, the rear ends of the slides 2 are flush, and the front ends of the slides 2 are distributed in an arc shape; the bottom end of the slide 2 located below and the bottom end of the support frame 20 are both fixedly connected with support legs​​​​​​​​The first hydraulic cylinder 6 is configured one-to-one with the displacement frame 5 and installed on the rear side of the bracket 1. The extended end of the first hydraulic cylinder 6 is connected to the vertical part of the displacement frame 5. Specifically, in this embodiment, the extension stroke of each first hydraulic cylinder 6 is set according to the displacement stroke of the positioning plate 3. The extension stroke of the first hydraulic cylinder 6 located on the outer side is greater than that of the first hydraulic cylinder 6 located on the inner side. This is prior art. Those skilled in the art can select the first hydraulic cylinder 6 with the corresponding extension stroke according to the forward movement stroke of the positioning plate 3. It will not be elaborated here.

[0057] When the positioning plate 3 is located at the front end of the slide 2, the upper surface of the bracket 1 forms a storage area 7 in the front area of ​​the displacement frame 5, which can store the main reinforcement bars. The top front end of the transverse part of the bracket 1 forms a channel opening 8 that allows the main reinforcement bars in the storage area 7 to pass through. Multiple main reinforcement bars can be placed in the storage area 7 in advance. When the positioning plate 3 is located at the rear end of the slide 2, all the positioning plates 3 are arranged in a straight line along the length of the main reinforcement bars. At this time, the two main reinforcement bars located at the front of the storage area 7 are pushed forward directly. After passing through the channel opening 8, the two main reinforcement bars move to the top of the positioning plate 3. At this time, the two main reinforcement bars can be moved into the two positioning slots 4 respectively.

[0058] When the main ribs of the grating steel frame are bent into shape, and the positioning plate 3 is located at the front end of its corresponding slide 2, the displacement frame 5 moves forward to the frontmost position. At this time, the displacement frame 5 is located at the rear end of the storage area 7, which can prevent the main ribs in the storage area 7 from being pushed forward and prevent the main ribs in the storage area 7 from falling off the channel opening 8.

[0059] Please refer to Figures 6 to 8 In embodiment two, a wedge plate 9 is provided on the bracket 1. The lower surface of the wedge plate 9 is flat and slides with the upper surface of the bracket 1. The main rib in the storage area 7 is located on the upper surface of the wedge plate 9. When the wedge plate 9 is in the foremost position, its tip and tail are flush with the front end of the positioning plate 3 and the rear end of the storage area 7, respectively. When the wedge plate 9 is in the rearmost position, its tip is located on the upper surface of the positioning plate 3 and the two positioning grooves 4 are exposed.

[0060] By using the top inclined surface of the wedge plate 9 to support the main ribs in the storage area 7, when the positioning plate 3 is located at the rear end of the slide 2, the wedge plate 9 is moved backward, and the main ribs at the top of the wedge plate 9 will roll down to the top of the positioning plate 3 and fill the top of the positioning plate 3. During this process, two main ribs will automatically fall into the two positioning slots 4.

[0061] Before the positioning plate 3 moves forward, the wedge plate 9 is moved forward to the foremost position. The wedge plate 9 can remove the main reinforcement bars at the top of the positioning plate 3 from the positioning plate 3. In this process, the main reinforcement bars are stacked back on the front side of the top of the wedge plate 9 in sequence, so as to ensure that when the positioning plate 3 is replenished with main reinforcement bars next time, the main reinforcement bars will be filled on the top of the positioning plate 3 and enter the positioning groove 4.

[0062] Please refer to this again. Figures 6 to 8 A comb-shaped frame 10, capable of moving the wedge plates 9 back and forth, is slidably mounted on the support 1. A second hydraulic cylinder 11 is connected to the rear side of the comb-shaped frame 10, and the second hydraulic cylinder 11 is mounted on the support 1 located above. The comb-shaped frame 10 connects all the wedge plates 9 into a whole, so that after the second hydraulic cylinder 11 is activated, all the wedge plates 9 are moved synchronously through the comb-shaped frame 10.

[0063] Please refer to Figures 9 to 12 In embodiment three, irregular rods 12 are fixedly installed on the brackets 1 on both sides. Vertical baffles 13 are provided on the outer sides of the two pairs of positioning plates 3 on both sides. The vertical baffles 13 are installed on the irregular rods 12. The vertical baffles 13 are located between the front end of the positioning plate 3 and the front positioning groove 4 in the front-back direction, and are used to prevent the main rib from falling off the front end of the top of the positioning plate 3.

[0064] The main reinforcement bars located at the top of the wedge plate 9 will be arranged sequentially from the front end of the top of the wedge plate 9 to the rear under their own weight. The vertical baffle 13 can block the front ends of the main reinforcement bars on both sides. At this time, the vertical baffle 13 will not affect the front and rear displacement of the positioning plate 3, and can also prevent the main reinforcement bars from detaching from the front end of the positioning plate 3 and the wedge plate 9.

[0065] Please refer to this again. Figures 9 to 12 The irregularly shaped rod 12 includes a front vertical section 12.1 and a rear vertical section 12.2 distributed front to back. A transverse baffle 14 is fixedly installed on the top of the rear side of the vertical baffle 13. The transverse baffle 14 is slidably installed on the front vertical section 12.1 in the height direction. The rear vertical section 12.2 is located at the rear end of the storage area 7. The front vertical section 12.1 and the rear vertical section 12.2 are located on the outer and inner sides of the ends of the main reinforcement bars, respectively, in the length direction of the main reinforcement bars. By setting the transverse baffle 14, the transverse baffle 14 can always press down on the main reinforcement bars located within the positioning plate 3 in the top of the wedge plate 9 under its own weight. When the wedge plate 9 moves back and forth, the transverse baffle 14 moves up and down synchronously with the main reinforcement bars under its own weight and keeps pressing down on the main reinforcement bars.

[0066] Specifically, in this embodiment, by setting the tilt angle of the top surface of the wedge plate 9, the distance between the main rib at the foremost point of the top of the wedge plate 9 and the bottom of the transverse baffle 14 is less than the outer diameter of the main rib. Therefore, during the process of the wedge plate 9 moving forward to remove the main rib from the top of the positioning plate 3, the accumulation of the main rib on the top of the positioning plate 3 in the height direction can be avoided. This ensures that after the main rib is removed to the top of the wedge plate 9, it is arranged in a row on the top of the wedge plate 9. During this process, the rear end of the transverse baffle 14 is supported by one of the main ribs, allowing the transverse baffle 14 to use its own weight to ensure that the distance between its rear end and the top of the wedge plate 9 does not exceed the outer diameter of the main rib. This further prevents a large number of main ribs on the top surface of the wedge plate 9 located behind the transverse baffle 14 from rolling below the transverse baffle 14, thus further preventing the accumulation of main ribs.

[0067] Please refer to Figures 13 to 19 In embodiment four, the positioning plate 3 includes: a main body 3.1, which is slidably mounted on the slide rail 2; a groove 3.2, which is disposed on the top of the main body 3.1, and the inner bottom wall of the groove 3.2 includes a first surface 3.3, a second surface 3.4 and a third surface 3.5 connected sequentially from front to back, the first surface 3.3 is used to support the main rib, the second surface 3.4 is a sloped surface with the rear end sloping downward, and the third surface 3.5 is a plane; and a lifting plate 3.6, which is slidably disposed in the main body 3.1, and has an "L"-shaped notch 3.7 on its rear side.

[0068] When the lifting plate 3.6 is in the highest position, its front side and notch 3.7 form two positioning grooves 4 with the inner wall surfaces of the front and rear grooves 3.2 respectively, and the main rib located in the rear positioning groove 4 is supported by the inner bottom wall of the notch 3.7.

[0069] When the lifting plate 3.6 is in its lowest position, its top height is less than the height of the second surface 3.4, and the width of the third surface 3.5 is less than the width of the positioning groove 4. Please refer to [reference needed]. Figure 18 and Figure 19 .

[0070] When the positioning plate 3 is located at the rear end of the slide 2, the lifting plate 3.6 moves downward and completely enters the main body 3.1. At this time, the wedge plate 9 moves backward, and the main rib that falls from the wedge plate 9 onto the positioning plate 3 will fall into the groove 3.2.

[0071] Of the main reinforcing bars that fall into the groove 3.2, the foremost main reinforcing bar will fall onto the first surface 3.3 and be supported there, and this main reinforcing bar is located within the range of the front positioning groove 4. The remaining main reinforcing bars will fall into the second surface 3.4 and the third surface 3.5, and the main reinforcing bars located on the third surface 3.5 are located within the range of the rear positioning groove 4.

[0072] When the lifting plate 3.6 moves upward to the highest position, the top of the lifting plate 3.6 will push the main ribs within the range of the second side 3.4 to a position at the same height as the top of the main body 3.1. Then, when the wedge plate 9 moves forward, it can remove all the main ribs at the top of the main body 3.1 except for the main ribs located in the positioning groove 4.

[0073] By making the above settings, as the processing of the tunnel grid steel frame continues, when the number of main reinforcement bars decreases and the main reinforcement bars falling into the top of the positioning plate 3 cannot cover the two positioning slots 4, the foremost main reinforcement bar can stably fall into the first surface 3.3 and be located within the range of the front positioning slot 4, while the remaining main reinforcement bars can roll towards the third surface 3.5 under the guidance of the second surface 3.4, always ensuring that one main reinforcement bar is located within the range of the rear positioning slot 4, thereby ensuring that the two positioning slots 4 can be supplemented with main reinforcement bars when the number of main reinforcement bars is small.

[0074] Please refer to Figures 13 to 17 In this embodiment, as the wedge plate 9 moves backward and the main reinforcement falls into the groove 3.2, the transverse baffle 14 can block the main reinforcement located behind it from entering, thus preventing the main reinforcement from accumulating. Of course, in order to improve the limiting effect of the transverse baffle 14 on the main reinforcement, a spring that provides pressure can be set at the top of the transverse baffle 14. One end of the spring can be fixed to the irregular rod 12. This is prior art and will not be described in detail here.

[0075] Please refer to this again. Figure 18 and Figure 19 The first surface 3.3 includes a first planar portion 3.3a located on the front side, an arc-shaped portion 3.3b whose front end connects to the rear end of the first planar portion 3.3a and whose rear end extends upward along an arc-shaped trajectory, and a second planar portion 3.3c whose front end connects to the rear end of the arc-shaped portion 3.3b and whose rear end connects to the front end of the second surface 3.4. By making the first surface 3.3 as described above, when the main rib falls into the groove 3.2, the foremost main rib can be limited by the arc-shaped portion 3.3b when it falls into the first surface 3.3, preventing it from sliding backward along the second surface 3.4, thereby ensuring that the positioning groove 4 located on the front side can effectively supplement the main rib.

[0076] Please refer to Figures 17 to 19 The bottom of the main body 3.1 is provided with a sliding plate 15 that can slide back and forth. The rear end of the sliding plate 15 is fixedly connected to the displacement frame 5. The rear end of the bottom of the lifting plate 3.6 and the front end of the top of the sliding plate 15 are provided with matching inclined surfaces. When the sliding plate 15 passes the bottom of the lifting plate 3.6 from back to front, it pushes the lifting plate 3.6 to the highest position and supports it at the bottom of the lifting plate 3.6. When the sliding plate 15 is in the rearmost position on the main body 3.1, it is located behind the lifting plate 3.6 and can pull the positioning plate 3 backward.

[0077] When the sliding plate 15 is at the foremost position inside the main body 3.1, the front end of the displacement frame 5 contacts the rear side of the main body 3.1. Initially, the sliding plate 15 is at the rearmost position inside the main body 3.1, at which point the front end of the displacement frame 5 is separated from the rear end of the main body 3.1. When the displacement frame 5 moves forward, it first pushes the sliding plate 15 forward within the main body 3.1. During this process, as the sliding plate 15 passes the lifting plate 3.6, it first lifts the lifting plate 3.6 to its highest position, causing the lifting plate 3.6 to lift the main rib on the second surface 3.4 to its bottom, flush with the top of the main body 3.1. Afterward, the sliding plate 15 continues to move forward within the main body 3.1, its top reaching the bottom of the lifting plate 3.6, thus stably supporting the lifting plate 3.6 at its highest position.

[0078] As the positioning plate 3 returns to its initial position from the front end of the slide rail 2, the displacement frame 5 pulls the sliding plate 15 backward. If the main body 3.1 remains stationary at this time, the sliding plate 15 will move backward to the last side position within the main body 3.1. After the sliding plate 15 is pulled away from the bottom of the lifting plate 3.6, the lifting plate 3.6 will fall downward to the lowest position under its own gravity and be completely stored inside the main body 3.1.

[0079] When the sliding plate 15 moves backward to the last side position within the main body 3.1, and the displacement frame 5 pulls the sliding plate 15 backward, the sliding plate 15 will pull the positioning plate 3 to move backward until the positioning plate 3 returns to the rear end of the slide rail 2. At this time, the positioning plate 3 is located below the wedge plate 9, and the lifting plate 3.6 remains at the lowest position within the main body.

[0080] Please refer to Figure 13 and Figure 14 The bracket 1 is equipped with a liftable stop 16. The stop 16 is L-shaped, and the width of the horizontal part of the stop 16 is greater than the width of the positioning groove 4. With this configuration, when the positioning plate 3 passes the bottom of the stop 16, the stop 16 will not fall into the positioning groove 4, ensuring that the positioning plate 3 can pass smoothly through the stop 16.

[0081] Furthermore, a roller is rotatably mounted on the front end face of the transverse portion of the stop 16. By setting the roller, the friction between the stop 16 and the positioning plate 3 is reduced when the positioning plate 3 passes the bottom of the stop 16.

[0082] The front end of the main body 3.1 is slidably provided with a lift rod 17 that can be raised and lowered. The rear side of the bottom end of the lift rod 17 is configured to match the inclined surface of the sliding plate 15. When the sliding plate 15 moves forward to the frontmost position on the positioning plate 3, its front end pushes the lift rod 17 to the highest position. When the lift rod 17 is at the highest position, its top end supports the stop block 16 in a state where the height is greater than the front end of the main body 3.1.

[0083] Specifically, in this embodiment, the rear end chamfer of the top of the main board 3.1 causes the chamfered surface to move upward by squeezing the roller when the main board 3.1 moves backward past the stop 16, providing space for the positioning plate 3 and the displacement frame 5 to reset.

[0084] In the initial state, both the stop block 16 and the push rod 17 are in their lowest positions. At this time, the bottom end of the stop block 16 is located on the front side of the main board body 3.1. Therefore, when the displacement frame 5 pushes the sliding plate 15 forward within the main board body 3.1, the main board body 3.1 remains stationary, ensuring that the lifting plate 3.6 can be pushed to its highest position by the sliding plate 15. When the front end of the sliding plate 15 extends from the main board body 3.1, it can push the push rod 17 upward. During this process, the push rod 17 pushes the stop block 16 upward. And when the sliding plate 15 moves forward within the main board body 3.1 to its foremost position, the push rod 17 pushes the stop block 16 to a height that is detached from the front end of the main board body 3.1. Afterward, when the displacement frame 5 moves forward, it can push the positioning plate 3 forward.

[0085] Please refer to the figure. The sliding plate 15 has a strip groove 18 inside, and the main body 3.1 has a limiting block 19 that passes through the strip groove 18 inside. When the sliding plate 15 is in the rearmost position on the main body 3.1, the front end face of the strip groove 18 contacts the front side face of the limiting block 19.

[0086] By setting the strip groove 18 and the limiting block 19, when the sliding plate 15 moves backward to the last side position within the main body 3.1, as the displacement frame 5 continues to pull the sliding plate 15 backward, the sliding plate 15 causes the positioning plate 3 to move backward synchronously through the strip groove 18 and the limiting block 19, thereby achieving the reset of the positioning plate 3.

[0087] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A positioning mold for the main reinforcing bars in the processing of tunnel grid steel frames, characterized in that, include: Multiple pairs of spaced supports (1), with two supports (1) in each pair of supports (1) arranged vertically, and the top of the vertical part of the support (1) connected to the front end of the bottom of its horizontal part; The slide (2) is fixedly installed at the bottom of the front side of the vertical part of the bracket (1). The rear end of the slide (2) is flush with the front end of the slide (2). The positioning plate (3) is slidably disposed in the slide (2). The upper surface of the positioning plate (3) is flush with the upper surface of the transverse part of the bracket (1), and the upper surface of the positioning plate (3) is provided with two positioning grooves (4) for accommodating the main ribs. The displacement frame (5) includes two front ends, and the two front ends of the displacement frame (5) are respectively connected to the two positioning plates (3) corresponding to each pair of brackets (1), which can drive the two positioning plates (3) to move synchronously; The first oil cylinder (6) is arranged in a one-to-one correspondence with the displacement frame (5) and installed on the rear side of the bracket (1). The extended end of the first oil cylinder (6) is connected to the vertical part of the displacement frame (5). When the positioning plate (3) is located at the front end of the slide (2), the upper surface of the bracket (1) forms a storage area (7) in the front area of ​​the displacement frame (5) that can store the main reinforcement, and the front end of the top of the bracket (1) forms a channel opening (8) that allows the main reinforcement in the storage area (7) to pass through. The bracket (1) is provided with a wedge plate (9). The lower surface of the wedge plate (9) is flat and slides with the upper surface of the bracket (1). The main rib in the storage area (7) is located on the upper surface of the wedge plate (9). When the wedge plate (9) is in the foremost position, its tip and tail are flush with the front end of the positioning plate (3) and the rear end of the storage area (7), respectively. When the wedge plate (9) is in the last position, its tip is located on the upper surface of the positioning plate (3) and the two positioning grooves (4) are exposed. The positioning plate (3) includes: The main body (3.1) is slidably mounted on the slide rail (2); A groove (3.2) is provided on the top of the main body (3.1). The inner bottom wall of the groove (3.2) includes a first surface (3.3), a second surface (3.4) and a third surface (3.5) connected sequentially from front to back. The first surface (3.3) is used to support the main rib, the second surface (3.4) is a downward inclined surface at the rear end, and the third surface (3.5) is a plane. The lifting plate (3.6) is installed in the main body (3.1) in a lifting manner, and has an "L"-shaped notch (3.7) on its rear side. When the lifting plate (3.6) is in the highest position, its front side and the notch (3.7) form two positioning grooves (4) with the inner wall surfaces of the front and rear grooves (3.2) respectively, and the main rib in the positioning groove (4) on the rear side is supported by the inner bottom wall of the notch (3.7). When the lifting plate (3.6) is in its lowest position, its top height is less than the height of the second surface (3.4), and the width of the third surface (3.5) is less than the width of the positioning groove (4).

2. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 1, characterized in that, A comb-shaped frame (10) capable of moving the wedge plate (9) back and forth is slidably mounted on the bracket (1). A second oil cylinder (11) is connected to the rear side of the comb-shaped frame (10). The second oil cylinder (11) is mounted on the bracket (1) located above.

3. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 1, characterized in that, A shaped rod (12) is fixedly installed on the bracket (1) on both sides. A vertical baffle (13) is provided on the outer side of the two pairs of positioning plates (3) on both sides. The vertical baffle (13) is installed on the shaped rod (12). The vertical baffle (13) is located between the front end of the positioning plate (3) and the front positioning groove (4) in the front-back direction to prevent the main rib from falling from the front end of the top of the positioning plate (3).

4. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 3, characterized in that, The irregular rod (12) includes a front vertical section (12.1) and a rear vertical section (12.2) distributed in a front-to-back manner. A transverse baffle (14) is fixedly installed on the top of the rear side of the vertical baffle (13). The transverse baffle (14) is slidably installed on the front vertical section (12.1) in the height direction. The rear vertical section (12.2) is located at the rear end of the storage area (7). The front vertical section (12.1) and the rear vertical section (12.2) are located on the outer and inner sides of the end of the main reinforcement in the length direction of the main reinforcement, respectively.

5. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 1, characterized in that, The first surface (3.3) includes a first planar portion (3.3a) located on the front side, an arc-shaped portion (3.3b) whose front end is connected to the rear end of the first planar portion (3.3a) and whose tail end extends upward along an arc-shaped trajectory, and a second planar portion (3.3c) whose front end is connected to the tail end of the arc-shaped portion (3.3b) and whose tail end is connected to the front end of the second surface (3.4).

6. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 1, characterized in that, The bottom of the main body (3.1) is provided with a sliding plate (15) that can slide back and forth. The rear end of the sliding plate (15) is fixedly connected to the displacement frame (5). The rear end of the bottom of the lifting plate (3.6) and the front end of the top of the sliding plate (15) are provided with matching inclined surfaces. When the sliding plate (15) passes the bottom of the lifting plate (3.6) from back to front, it pushes the lifting plate (3.6) to the highest position and supports it at the bottom of the lifting plate (3.6). When the sliding plate (15) is located at the rearmost position on the main body (3.1), the sliding plate (15) is located at the rear side of the lifting plate (3.6) and can pull the positioning plate (3) backward.

7. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 6, characterized in that, The bracket (1) is provided with a movable stop (16), which is "L" shaped. The width of the horizontal part of the stop (16) is greater than the width of the positioning groove (4). A roller is rotatably installed on the front end face of the horizontal part of the stop (16). A movable top rod (17) is slidably provided on the front end of the main body (3.1). The rear side of the bottom end of the top rod (17) is set to a shape that matches the inclined surface of the sliding plate (15). When the sliding plate (15) moves forward to the frontmost position on the positioning plate (3), the front end of the sliding plate (15) pushes the top rod (17) to the highest position. When the top rod (17) is at the highest position, its top end supports the stop (16) at a position with a height greater than the front end of the main body (3.1).

8. The positioning mold for main reinforcing bars in tunnel grid steel frame processing according to claim 6, characterized in that, The sliding plate (15) has a strip groove (18) inside, and the main body (3.1) has a limiting block (19) that passes through the strip groove (18) inside. When the sliding plate (15) is located at the rearmost position on the main body (3.1), the front end face of the strip groove (18) contacts the front side face of the limiting block (19).

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