Template dismounting device for prefabricated ditch cover plate

Abstract

A formwork dismounting device for a prefabricated ditch cover plate comprises a rectangular frame, the rear portions of the two sides of the outer end of the rectangular frame are each hinged to an operating rod extending forwards through a hinge shaft, the two sides of the rectangular frame are each provided with a mold fixing sliding groove used for clamping a mold, and the upper portions of the two sides of the front end of the rectangular frame are each provided with a front supporting leg; the two front supporting legs transversely extend outwards to be provided with upturning dowel bars used for limiting upturning of the operating rod respectively, the upper portions of the two sides of the rear end of the rectangular frame are each provided with a rear supporting leg, and the lower portions of the two sides of the rear end of the rectangular frame are each provided with a lower supporting leg. The two lower supporting legs transversely extend outwards to be provided with downward pressing dowel bars used for limiting downward turning of the control rods respectively, and arc-shaped elastic plates bent backwards are fixedly connected between the upper ends of the rear supporting legs and the lower ends of the lower supporting legs. The formwork dismounting device for the prefabricated ditch cover plate is simple in structure, ingenious in arrangement and convenient to pull and clamp in a formwork back ridge and overturn.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge pier construction, specifically a dismantling template device for precast drainage ditch covers that assists in pier construction. Background Technology

[0002] During highway construction, drainage systems are often built, and ditches and side ditches are the most widely used drainage structures in these systems. The top covers of highway drainage ditches are typically precast concrete. Because these covers are small precast blocks, and the demand is insufficient to support mechanized precast yards, construction relies heavily on manual labor. Precast ditch covers use integral plastic formwork. After the concrete is poured and reaches demolding strength, the formwork must be manually turned over to remove the precast blocks. The finished covers are heavy, requiring several people to work together for demolding, necessitating significant manpower. This not only results in high labor intensity and low demolding efficiency but also greatly increases the risk of accidents causing injuries. Furthermore, forceful demolding can damage the covers, rendering them defective and wasteful, leading to economic losses, extended construction periods, and increased costs, making it difficult to meet the high-efficiency construction requirements of large-scale projects. Therefore, demolding devices have been developed, and several demolding devices have been reported in the literature, such as:

[0003] 1. Chinese Patent: A Demolding Device for Plastic Molds of Highway Drainage Ditch Covers, Application No.: 201910656725.9, Application Date: 2019.07.19, Abstract: This invention discloses a demolding device for plastic molds of highway drainage ditch covers, which consists of a rectangular frame, a mold fixing groove, an upper mold A support leg, a force transmission rod, a rod shaft, a U-shaped operating rod, a demolding A support leg, a demolding B support leg, a fixing rod, etc. This invention utilizes the lever principle to realize the flipping and demolding of the part to be demolded, and has the advantages of simple structure and convenient operation. One person can operate it independently, which improves the demolding efficiency of this type of mold.

[0004] 2. Chinese Patent: A Demolding Tool for Precast Covers of Highway Drainage Ditches, Application No.: 202023039648.X, Application Date: 2020.12.16, Abstract: This utility model relates to a demolding tool for precast covers of highway drainage ditches, including a template frame and a push-pull handle; the template frame is a rectangular frame welded from two horizontal bars and two vertical bars, with two front support legs and two rear support legs welded to the four corners respectively. The distance between the lower end of the two front support legs and the bottom surface of the rectangular frame, and the distance between the upper end of the two front support legs and the top surface of the rectangular frame, are both greater than the thickness of the precast template of the drainage ditch. The lower end of the two rear support legs is welded to the rectangular frame, and the upper end is at the same height as the upper end of the front support legs. A limiting rod parallel to the vertical bar is welded to each of the two rear support legs. The push-pull handle includes two connecting rods and a handle rod. One end of the two connecting rods is welded to both ends of the handle rod, and the other end is connected to the outside of the two horizontal bars through a pin. The two connecting rods are located below the limiting rod. This utility model uses the lever principle to flip the precast cover plate template of the drainage ditch, which can greatly save the physical strength of construction workers and improve construction efficiency.

[0005] Application research revealed that the aforementioned demolding tools are inconvenient and slow to pull and snap into the template back ribs and flip. Therefore, a template disassembly device with a simple structure that facilitates pulling and snapping into the template back ribs and flipping is needed. Summary of the Invention

[0006] The purpose of this utility model is to provide a disassembly template device for precast drainage ditch covers. This disassembly template device for precast drainage ditch covers has a simple structure and ingenious design, making it easy to pull and snap into the template back ribs and flip over.

[0007] This utility model is achieved using the following technical solution:

[0008] A disassembly template device for a precast drainage ditch cover includes a rectangular frame. A forward-extending control lever is hinged to each of the two rear ends of the rectangular frame via a hinge shaft. Template fixing grooves for locking the template are provided on both sides of the rectangular frame. A front support leg is provided on each of the upper front ends of the rectangular frame, and an upward-extending force transmission rod for limiting the upward tilting of the control lever is provided on each of the two front support legs. A rear support leg is provided on each of the upper rear ends of the rectangular frame, and a lower support leg is provided on each of the lower rear ends of the rectangular frame, and a downward-extending force transmission rod for limiting the downward tilting of the control lever is provided on each of the two lower support legs. A backward-curving arc-shaped elastic plate is fixedly connected between the upper end of the rear support leg and the lower end of the lower support leg.

[0009] A further preferred embodiment: a cross link is fixedly connected between the front ends of the two control levers. The worker uses the cross link to pull the device to the precast cover plate, inserts the template back rib into the template fixing groove, and pushes it against the lower support leg. After locking, the worker flips the cross link upwards. Due to the constraint of the upward-flipping force transmission rod, under the support and guidance of the arc-shaped elastic plate, the control lever flips the rectangular frame and template as a whole backwards. At this time, the front and rear support legs are supported on the ground, and the downward-pressing force transmission rod is located at the bottom of the control lever. Due to the constraint of the downward-pressing force transmission rod, under the support and guidance of the arc-shaped elastic plate, the downward-pressing cross link can knock the front support leg to the ground, causing the cover plate to detach from the template by its own weight.

[0010] A further preferred embodiment: the bottom of the lower support leg is equipped with casters, which facilitates the overall movement of the rectangular frame and allows the template fixing groove to be engaged with the template back rib.

[0011] A further preferred embodiment: The rectangular frame is welded together from two horizontal bars and two vertical bars. Each horizontal bar is composed of two horizontal bar segments connected in an adjustable manner via adjusting bolts. Each vertical bar is also composed of two vertical bar segments connected in an adjustable manner via adjusting bolts. That is, one end of each of the two horizontal bar segments is fixedly welded to its corresponding vertical bar, and the other end of each horizontal bar segment is provided with a connecting hole. Adjusting bolts are installed in the connecting holes to fix the two horizontal bar segments. Similarly, one end of each of the two vertical bar segments is fixedly welded to its corresponding horizontal bar, and the other end of each vertical bar segment is provided with a connecting hole. Adjusting bolts are installed in the connecting holes to fix the two vertical bar segments. This allows for adjustment of the size of the rectangular frame.

[0012] The dismantling device for this precast drainage ditch cover has a simple and ingenious structure. A backward-curving elastic plate is fixedly connected between the upper end of the rear support leg and the lower end of the lower support leg. Using this elastic plate as a support point, the template and cover are flipped together, making flipping effortless. The cover is demolded by the front support leg striking the ground, allowing it to slide off under its own weight, avoiding chipping caused by forceful demolding. No multiple people are needed to move it during flipping and demolding, preventing accidents caused by impacts. Furthermore, casters are installed at the bottom of the lower support leg, facilitating the movement of the entire rectangular frame. The template fixing groove engages with the template back rib, allowing one person to complete the demolding operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the disassembly template device for this precast drainage ditch cover before it is secured to the template.

[0014] Figure 2 yes Figure 1 Enlarged view of a portion of the image;

[0015] Figure 3 This is a schematic diagram of the disassembly template device of this precast drainage ditch cover after it has snapped into place;

[0016] Figure 4 This is a schematic diagram of the disassembly template device for this precast drainage ditch cover, showing the snap-on template flipping mechanism.

[0017] Figure 5 yes Figure 4 Enlarged view of a portion of the image;

[0018] Figure 6 This is a schematic diagram showing the separation of the template and the cover plate;

[0019] Figure 7 yes Figure 6 Enlarged view of a portion of the image;

[0020] The names corresponding to the serial numbers in the figure are:

[0021] 1. Template; 2. Horizontal connecting rod; 3. Control lever; 4. Front support leg; 5. Rectangular frame; 6. Rear support leg; 7. Arc-shaped elastic plate; 8. Lower support leg; 9. Casters; 10. Adjusting bolt; 11. Downward force transmission rod; 12. Template fixing groove; 13. Hinge shaft; 14. Upward force transmission rod; 15. Cover plate. Detailed Implementation

[0022] The technical solutions of the invention will be clearly and completely described below with reference to the embodiments. The described embodiments are only a part of the present utility model, and not all of the embodiments. Example 1

[0023] A disassembly template device for a precast drainage ditch cover includes a rectangular frame 5. A forward-extending control lever 3 is hinged to each of the two rear ends of the outer side of the rectangular frame 5 via a hinge shaft 13. Template fixing grooves 12 for locking the template 1 are provided on both sides of the rectangular frame 5. A front support leg 4 is provided on the upper part of each of the front two sides of the rectangular frame 5. An upward force transmission rod 14 for limiting the upward tilting of the control lever 3 is provided on each of the two front support legs 4 laterally. A rear support leg 6 is provided on the upper part of each of the rear two sides of the rectangular frame 5. A lower support leg 8 is provided on the lower part of each of the rear two sides of the rectangular frame 5. A downward force transmission rod 11 for limiting the downward tilting of the control lever 3 is provided on each of the two lower support legs 8 laterally. A backward-curving arc-shaped elastic plate 7 is fixedly connected between the upper end of the rear support leg 6 and the lower end of the lower support leg 8. A caster wheel 9 is installed at the bottom of the lower support leg 8.

[0024] A horizontal connecting rod 2 is fixedly connected between the front ends of the two control levers 3. The worker pulls the device to the precast cover plate 15 using the horizontal connecting rod 2, and inserts the template back rib into the template fixing groove 12, pushing it against the lower support leg 8. After locking, the worker flips the horizontal connecting rod 2 upwards. Due to the restriction of the upward force transmission rod 14, under the support and guidance of the arc-shaped elastic plate 7, the control lever 3 flips the rectangular frame 5 and the template 1 backwards as a whole. At this time, the template 1 opening faces downwards, the front support leg 4 and the rear support leg 6 are supported on the ground, and the downward force transmission rod 11 is located at the bottom of the control lever 3. Due to the restriction of the downward force transmission rod 11, under the support and guidance of the arc-shaped elastic plate 7, the downward horizontal connecting rod 2 can knock the front support leg 4 to the ground, and the cover plate 15 is dislodged from the template 1 by its own weight. Example 2

[0025] A disassembly template device for a precast drainage ditch cover includes a rectangular frame 5. A forward-extending control lever 3 is hinged to each of the two rear ends of the outer side of the rectangular frame 5 via a hinge shaft 13. Template fixing grooves 12 for locking the template 1 are provided on both sides of the rectangular frame 5. A front support leg 4 is provided on the upper part of each of the front two sides of the rectangular frame 5. An upward force transmission rod 14 for limiting the upward tilting of the control lever 3 is provided on each of the two front support legs 4 laterally. A rear support leg 6 is provided on the upper part of each of the rear two sides of the rectangular frame 5. A lower support leg 8 is provided on the lower part of each of the rear two sides of the rectangular frame 5. A downward force transmission rod 11 for limiting the downward tilting of the control lever 3 is provided on each of the two lower support legs 8 laterally. A backward-curving arc-shaped elastic plate 7 is fixedly connected between the upper end of the rear support leg 6 and the lower end of the lower support leg 8. A caster wheel 9 is installed at the bottom of the lower support leg 8.

[0026] A horizontal connecting rod 2 is fixedly connected between the front ends of the two control levers 3. The worker pulls the device to the precast cover plate 15 using the horizontal connecting rod 2, and inserts the template back rib into the template fixing groove 12, pushing it against the lower support leg 8. After locking, the worker flips the horizontal connecting rod 2 upwards. Due to the restriction of the upward force transmission rod 14, under the support and guidance of the arc-shaped elastic plate 7, the control lever 3 flips the rectangular frame 5 and the template 1 backwards as a whole. At this time, the template 1 opening faces downwards, the front support leg 4 and the rear support leg 6 are supported on the ground, and the downward force transmission rod 11 is located at the bottom of the control lever 3. Due to the restriction of the downward force transmission rod 11, under the support and guidance of the arc-shaped elastic plate 7, the downward horizontal connecting rod 2 can knock the front support leg 4 to the ground, and the cover plate 15 is dislodged from the template 1 by its own weight.

[0027] The rectangular frame 5 is welded together from two horizontal bars and two vertical bars. Each horizontal bar is composed of two horizontal bar segments connected in an adjustable manner via adjusting bolts 10. Similarly, each vertical bar is composed of two vertical bar segments connected in an adjustable manner via adjusting bolts 10. One end of each horizontal bar segment is fixedly welded to its corresponding vertical bar, and the other end of each horizontal bar segment has a connecting hole into which adjusting bolts 10 are installed to secure the horizontal bar segment. Similarly, one end of each vertical bar segment is fixedly welded to its corresponding horizontal bar, and the other end of each vertical bar segment has a connecting hole into which adjusting bolts 10 are installed to secure the vertical bar segment. This allows for adjustment of the size of the rectangular frame 5. Before operation, the rectangular frame 5 is adjusted to the appropriate size using the adjusting bolts 10, based on the dimensions of the template 1.

[0028] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A prefabricated water ditch cover plate dismounting template device, comprising a rectangular frame (5), the outer end of the rectangular frame (5) is respectively hinged with a forward stretching operating lever (3) through a hinged shaft (13) on both sides of the rear part, the both sides of the rectangular frame (5) are respectively provided with a template fixing sliding groove (12) for clamping the template (1), the both sides of the front end of the rectangular frame (5) are respectively provided with a front supporting leg (4), the both sides of the two front supporting legs (4) are respectively transversely outwardly provided with an upturning force transmission rod (14) for limiting the upturning of the operating lever (3), the both sides of the rear end of the rectangular frame (5) are respectively provided with a rear supporting leg (6) on the upper part, the both sides of the rear end of the rectangular frame (5) are respectively provided with a lower supporting leg (8) on the lower part, the both sides of the two lower supporting legs (8) are respectively transversely outwardly provided with a down-pressing force transmission rod (11) for limiting the down-pressing of the operating lever (3), characterized in that: An arc-shaped elastic plate (7) curved to the back is fixedly connected between the upper end of the back supporting leg (6) and the lower end of the lower supporting leg (8).

2. The precast gutter cap panel disassembly form apparatus of claim 1, wherein: Front ends of the two operating rods (3) are fixedly connected with a cross connecting rod (2).

3. The precast gutter cap panel disassembly form apparatus of claim 1, wherein: A universal wheel (9) is mounted at the bottom of the lower supporting leg (8).

4. The precast gutter cap panel disassembly form apparatus of claim 1, wherein: The rectangular frame (5) is formed by welding two cross rods and two longitudinal rods, each cross rod is formed by two cross rod segments which are adjustably connected by adjusting bolts (10), and each longitudinal rod is formed by two longitudinal rod segments which are adjustably connected by adjusting bolts (10).

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