Folding and unfolding type elevator shaft construction inner formwork

Abstract

The utility model relates to the technical field of building construction, and discloses a folding and unfolding type elevator shaft construction inner formwork which comprises a two-way lead screw, the two ends of the two-way lead screw are connected with a *-shaped support and a push-pull assembly respectively in a mirror symmetry mode, the central axis of the two-way lead screw coincides with the central axes of the push-pull assembly and the *-shaped support, and an inner folding plate is connected between the push-pull assemblies. The adjacent inner folding plates are connected through the corner formworks, the corner formworks are connected with the push-pull assembly through the *-shaped support, the *-shaped support is connected with the push-pull mechanism and assists the push-pull mechanism to move, and the driving mechanism is fixedly connected to the upper end of the *-shaped support. Through the arrangement of the bidirectional lead screw, the *-shaped bracket, the push-pull assembly, the angle template, the driving mechanism and the inner folding plate, the inner folding plate can be adjusted through the matching of the driving mechanism, the bidirectional lead screw, the push-pull assembly and the *-shaped bracket during use, and meanwhile, the stability is improved through the angle template; the problems that a traditional formwork needs manual operation and is poor in device stability are solved, and the construction efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an inner template for construction of a folding elevator shaft. Background Art

[0002] With the continuous development of the construction industry, more and more projects are under construction. High-rise or super-high-rise buildings are now common, and elevators are essential facilities for such buildings. At present, the internal formwork of elevator shaft construction is mostly supported by traditional wooden formwork or aluminum formwork. The internal formwork of the shaft is usually assembled by loose formwork, which is difficult to operate and difficult to control quality, time-consuming and labor-intensive, and has low construction efficiency.

[0003] The Chinese patent with the announcement number CN218643851U discloses an articulated integral aluminum formwork for the inner tube of an elevator shaft. The device is provided with a pull rope and a pull rod. The pull rod is provided with an upper limit and a lower limit that match the slideway. A plurality of fixed pulleys are distributed on the pull rod above the upper limit. The installation angles of the plurality of fixed pulleys correspond to a plurality of full-surface templates around. The pull rope connected to the template unit in each full-surface template bypasses the corresponding fixed pulley and is connected to the pull rod. The device moves between the upper limit and the lower limit in the slideway through the pull rod, and then pulls the pull rope, which drives the full-surface template to fold and unfold through the fixed pulley.

[0004] Although the device is easy to operate and has good integrity, it improves work efficiency. However, it has the following problems:

[0005] 1. When the pull rod stops at the upper limit, the unfolding of the entire template still requires manual operation and cannot be unfolded automatically. There are major safety hazards and it is difficult to ensure accuracy.

[0006] 2. The hinged parts of the entire template on both adjacent sides of the device are difficult to fix and have insufficient rigidity. They are easily deformed by the pressure generated when the concrete solidifies, thereby expanding the mold, making it difficult to ensure the accuracy and quality of the elevator shaft construction.

[0007] Therefore, it is necessary to provide a new folding elevator shaft construction inner template to solve the above-mentioned technical problems. Utility Model Content

[0008] The purpose of the utility model is to provide an inner formwork for elevator shaft construction, which can solve the problem that the inner formwork needs to be unfolded manually in the past, and the device is easily deformed by the pressure of concrete solidifying at the inner corner of the elevator shaft, thereby causing the formwork to expand, making it difficult to ensure the accuracy and quality during construction, and there are safety hazards.

[0009] To achieve the above purpose, the utility model provides the following technical solutions: a foldable elevator shaft construction inner template, including an angle template, a M-shaped bracket, a driving mechanism, a push-pull assembly, a bidirectional screw rod, and an inner folding plate.

[0010] The two ends of the bidirectional screw rod are respectively provided with an upper thread and a lower thread, the upper end of the lower thread is provided with a protrusion, and the upper thread and the lower thread are mutually reverse threads, which can drive the two groups of the push-pull components to move in reverse directions;

[0011] The push-pull components and the Pozigzag brackets are provided in two groups, which are mirror-symmetrically arranged at the two ends of the bidirectional screw rod;

[0012] The driving mechanism is fixedly connected to the upper M-shaped bracket and is drivingly connected to the bidirectional screw rod;

[0013] The push-pull assembly includes a nut, a push-pull rod, a connecting block, a thin plug rod and a return hook rod. A group of the push-pull assemblies includes a nut, four push-pull rods, four connecting blocks, four return hook rods, and four thin plug rods. One end of the four push-pull rods is equidistantly hinged on the outer peripheral surface of the nut, and the other end of the four push-pull rods is respectively hinged to one of the connecting blocks. The two opposite surfaces of the connecting block are respectively fixedly connected to the return hook rod and one end of the thin plug rod. The other end of the thin plug rod is plugged into the other end of the round tube. The return hook rod contacts the outer side surface of the inner folding plate, and the nut is threadedly connected to the bidirectional screw rod.

[0014] The Pozi bracket comprises a Pozi bracket connecting ring and a round tube, a group of the Pozi bracket comprises a Pozi bracket connecting ring and eight round tubes, the Pozi bracket connecting ring is rotatably connected to the bidirectional screw rod, one end of the round tube is evenly fixedly connected to the outer side of the Pozi bracket connecting ring, and the axis of the round tube intersects vertically with the axis of the Pozi bracket connecting ring;

[0015] The corner template includes a triangular plate, a right-angle plate and a thick plug rod, the triangular plate is fixedly connected to the upper and lower ends of the right-angle plate, the thick plug rod and the triangular plate are on the same plane, one end of the thick plug rod is vertically connected to the middle of the hypotenuse of the triangular plate, and the other end of the thick plug rod is plugged into the round tube. The corner template is used to form a basic frame of the template to ensure the stability of the template;

[0016] The number of the corner templates and the number of the inner folding plates are both four, and the inner folding plates are rotatably connected to the left and right sides of the right-angle plate and connected to the adjacent corner templates.

[0017] Preferably, the two groups of the Pozigzag brackets are located between the two nuts.

[0018] Preferably, the inner side surface of the M-shaped bracket connecting ring is rotatably connected to the bidirectional screw rod to ensure that the bidirectional screw rod can rotate smoothly. The round tube is used to connect the inner folding plate, and its axis line intersects vertically with the axis line of the M-shaped bracket connecting ring to ensure a stable structure.

[0019] Preferably, the inner folding plate is composed of two templates connected by hinges, and the inner folding plate can only be bent toward the side close to the connecting block, and the bending and flattening of the inner folding plate are achieved by the control of the push-pull assembly.

[0020] Preferably, the driving mechanism includes a servo motor, a housing, and a worm wheel and a worm meshingly connected in the housing; the servo motor and the housing are fixedly connected to the Pozidriv bracket; the axial hole of the worm wheel is fixedly sleeved on the bidirectional screw; the worm wheel is fixedly connected below the upper thread, connecting the bidirectional screw and the driving mechanism.

[0021] Preferably, the upper and lower ends of the bidirectional screw are fixedly connected to a limited position cylinder, the upper thread is opened at the top near the worm gear, and the lower thread is opened at the lower end of the Pozidriv bracket connecting ring near the bottom.

[0022] Preferably, the outer diameter of the limiting cylinder is larger than the outer diameter of the upper thread and the outer diameter of the lower thread.

[0023] Preferably, a butt plate is fixedly connected between the connecting blocks corresponding to the two push-pull assemblies, and the butt plate is parallel to the bidirectional screw rod. The butt plate contacts the inner side surface of the inner folding plate to increase the contact area with the inner folding plate, so that the connecting block is evenly stressed on the inner folding plate.

[0024] Preferably, the return hook rod is in an L-shape, and the return hook rod is in contact with the hinged portion of the outer side surface of the inner folding plate. The L-shaped return hook rod is small in size and is not prone to leaving a large cavity during pouring.

[0025] Preferably, the adjacent sides of the two M-shaped brackets are fixedly connected with a flat plate, a circular hole for the bidirectional screw rod to pass through is reserved in the middle of the flat plate, and a gap is reserved between the edge of the flat plate and the corner template and the inner folding plate.

[0026] Preferably, the Pozidriv bracket also includes a thrust ball bearing, which is fixedly connected to the Pozidriv bracket connecting ring below, the axis of the thrust ball bearing coincides with the axis of the Pozidriv bracket connecting ring, the upper end surface of the thrust ball bearing is rotatably connected to the bottom of the protrusion, and the thrust ball bearing bears the weight of the bidirectional screw by contacting with the boss, thereby improving the stability of the device and reducing the wear of the boss in contact with the Pozidriv bracket connecting ring.

[0027] Preferably, a protective tube is fixedly connected between the plane plates, the inner diameter of the protective tube is larger than the outer diameter of the thrust ball bearing, and the axis center line of the protective tube coincides with the axis center line of the bidirectional screw.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] 1. The present application starts the driving mechanism to drive the bidirectional screw for transmission, thereby driving the push-pull assembly threaded at both ends of the bidirectional screw to move in the opposite direction, and assists the push-pull assembly in moving by providing a M-shaped bracket. When demoulding is required, the two sets of push-pull assemblies move away from each other, driving the return hook rod to apply a force to the inner folding plate to move toward the bidirectional screw, thereby achieving demoulding of the template. When formwork support is required, the two sets of push-pull assemblies move toward each other under the action of the bidirectional screw, and the connecting block and the abutment plate apply a force to the inner folding plate away from the bidirectional screw, thereby achieving formwork support, which solves the problem that the template in the existing elevator shaft needs to be manually operated during construction, and cannot be automatically unfolded and folded, thus avoiding safety hazards during construction and improving construction efficiency.

[0030] 2. This application sets up corner formwork and M-shaped brackets, and the left and right ends of the corner formwork are rotatably connected to the inner folding plate corner formwork, so that the inner folding plate is not easily deformed by the pressure generated when the concrete solidifies, thereby expanding the formwork and ensuring the accuracy and quality of the elevator shaft construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0033] Figure 2 It is a top plan view of the utility model;

[0034] Figure 3 To remove Figure 1 The schematic diagram of the main view after the corner template and the inner folding plate;

[0035] Figure 4 A schematic diagram of the connection between the bidirectional lead screw, boss and worm gear provided in an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1. Angle template; 11. Triangle plate; 12. Right angle plate; 13. Thick plug rod; 2. Abutment plate; 3. Pozidriv bracket; 31. Pozidriv bracket connecting ring; 32. Round tube; 4. Driving structure; 41. Servo motor; 42. Worm; 43. Worm gear; 5. Push-pull assembly; 51. Nut; 52. Push-pull rod; 53. Hook rod; 54. Thin plug rod; 55. Connecting block; 6. Inner folding plate; 7. Bidirectional screw rod; 71. Upper thread; 72. Lower thread; 73. Boss; 8. Flat plate; 9. Protective tube; 10. Limit cylinder;

[0038] 14. Thrust ball bearing; 15. Positioning mechanism; 16. Lifting ring. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "left", "right", "front", "back" and the like appear, the directions or positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0041] Example: See Figures 1 to 4 , the utility model provides a technical solution:

[0042] A foldable elevator shaft construction inner template, comprising an angle template 1, a M-shaped bracket 3, a driving mechanism 4, a push-pull assembly 5, a bidirectional screw rod 7, and an inner folding plate 6, wherein

[0043] The two ends of the bidirectional screw rod 7 are respectively provided with an upper thread 71 and a lower thread 72 with opposite thread directions, and a protrusion 73 is provided on the upper side of the lower thread 72. The upper and lower ends of the bidirectional screw rod 7 are fixedly connected to the limiting cylinder 10. The upper thread 71 is opened at the upper end close to the worm gear 43, and the lower thread 72 is opened on the lower side of the lower M-shaped bracket connecting ring 31. The outer diameter of the limiting cylinder 10 is larger than the outer diameter of the upper thread 71 and the outer diameter of the lower thread 72.

[0044] The driving mechanism 4 includes a servo motor 41, a housing, and a worm wheel 43 and a worm 42 meshingly connected in the housing. The servo motor 41 and the housing are fixedly connected to the upper Pozidriv bracket 3. The worm 42 in the housing is meshingly linked to the worm wheel 43. The axial hole of the worm wheel 43 is fixedly sleeved on the bidirectional lead screw 7. The driving mechanism 4 is drivingly connected to the bidirectional lead screw 7 to realize the control of the bidirectional lead screw 7.

[0045] The M-shaped bracket 3 is arranged at both ends of the bidirectional screw 7 in a mirror-symmetrical manner, including a M-shaped bracket connecting ring 31 and a round tube 32. The inner side surface of the M-shaped bracket connecting ring 31 is rotatably connected to the bidirectional screw 7. One end of the round tube 32 is evenly fixedly connected to the outer side surface of the M-shaped bracket connecting ring 31, and the axis of the round tube 32 is perpendicularly intersected with the axis of the M-shaped bracket connecting ring 31. The thrust ball bearing 14 is connected to the M-shaped bracket connecting ring 31 below, and the axis of the thrust ball bearing 14 coincides with the axis of the M-shaped bracket connecting ring 31. The upper end surface of the thrust ball bearing 14 is rotatably connected to the bottom of the protrusion 73. The two ends of the protective tube 9 are respectively fixedly connected between the two groups of M-shaped bracket connecting rings 31, and the inner diameter of the protective tube 9 is larger than the outer diameter of the thrust ball bearing 14.

[0046] The push-pull assembly 5 is arranged at both ends of the bidirectional screw 7 in a mirror-symmetrical manner, including a nut 51, a push-pull rod 52, a connecting block 55, a thin insert rod 54 and a return hook rod 53. The nut 51 is threadedly connected to the bidirectional screw 7, and the return hook rod 53 is L-shaped. One end of the four push-pull rods 52 is equidistantly hinged on the outer peripheral surface of the nut 51, and the other ends of the four push-pull rods 52 are respectively hinged to a connecting block 55. The two opposite surfaces of the connecting block 55 are respectively fixedly connected to the return hook rod 53 and one end of the thin insert rod 54. The other end of the thin insert rod 54 is plugged into the other end of the circular tube 32. The return hook rod 53 contacts the outer side surface of the inner folding plate 6. The two ends of the abutment plate 2 are respectively fixedly connected to the corresponding two connecting blocks 55, and the abutment plate 2 is parallel to the bidirectional screw 7.

[0047] The corner template 1 includes a triangular plate 11, a right-angle plate 12 and a thick plug rod 13. The triangular plate 11 is fixedly connected to the upper and lower ends of the right-angle plate 12. The thick plug rod 13 and the triangular plate 11 are on the same plane. One end of the thick plug rod 13 is vertically connected to the middle part of the hypotenuse of the triangular plate 11, and the other end of the thick plug rod 13 is plugged into the circular tube 32. There are four corner templates 1 and four inner folding plates 6. The inner folding plate 6 is composed of two templates connected by hinges, and the inner folding plate 6 can only be bent toward the side close to the connecting block 55. The inner folding plate 6 is rotatably connected to the left and right sides of the right-angle plate 12 and connects the adjacent corner templates 1.

[0048] There are two plane plates 8 connected to the adjacent two sides of the two groups of M-shaped brackets 3. A circular hole for the bidirectional screw rod 7 to pass through is reserved in the middle of the plane plate 8, and a gap is reserved between the edge of the plane plate 8 and the corner template 1 and the inner folding plate 6.

[0049] The use of the utility model:

[0050] S1: Formwork, when in use, it is lifted to the specified position through the lifting ring. When the support seat of the positioning mechanism is stuck in the reserved box position, the positioning function can be achieved, which increases the stability of the entire device. When the motor is started, the worm drives the worm wheel to rotate, and the worm wheel drives the fixedly connected bidirectional screw to rotate. The threads of the bidirectional screw drive the nuts of the two sets of push-pull components to move toward each other. When the nuts move toward each other, the push-pull rod causes the connecting block and the abutment plate fixedly connected between the connecting blocks to apply an outward force to the inner folding plate, so that the inner folding plate completes the formwork. When the inner folding plate moves outward, it drives the angle template to expand outward. During the whole process, the thin plug rod is slidably connected to the round tube and moves outward. The M-shaped bracket forms a stable support structure to assist the push-pull component to complete the movement. After reaching the fixed position, the motor stops rotating. At this time, the formwork is completed and cement pouring can be carried out.

[0051] S2: Demolding, start the motor, the worm drives the worm wheel to rotate, the worm wheel drives the fixedly connected bidirectional screw to rotate, and the threads of the bidirectional screw drive the nuts of the two sets of push-pull components to move apart. When the nuts move apart, the push-pull rod drives the return hook rod to apply an inward force to the inner folding plate, so that the inner folding plate is demoulded. When the inner folding plate moves inward, it drives the angle template to shrink inward. During the whole process, the thin plug rod is connected with the round tube and moves inward. The M-shaped bracket forms a stable support structure to assist the push-pull component to complete the movement. After reaching the fixed position, the motor stops rotating. At this time, demoulding is completed.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A foldable elevator shaft construction inner formwork, characterized in that: It comprises an angle template (1), a M-shaped bracket (3), a driving mechanism (4), a push-pull assembly (5), a bidirectional screw rod (7), and an inner folding plate (6). The two ends of the bidirectional screw rod (7) are respectively provided with an upper thread (71) and a lower thread (72), the upper end of the lower thread (72) is provided with a protrusion (73), and the upper thread (71) and the lower thread (72) are reverse threads to each other; The driving mechanism (4) is fixedly connected to the Pozidriv bracket (3) and is drivingly connected to the bidirectional screw rod (7); The Pozidriv bracket (3) comprises a Pozidriv bracket connecting ring (31) and a round tube (32), wherein the inner side surface of the Pozidriv bracket connecting ring (31) is rotatably connected to the bidirectional screw rod (7), one end of the round tube (32) is evenly and fixedly connected to the outer side surface of the Pozidriv bracket connecting ring (31), and the axis of the round tube (32) intersects perpendicularly with the axis of the Pozidriv bracket connecting ring (31); The push-pull assembly (5) comprises a nut (51), a push-pull rod (52), a connecting block (55), a thin insert rod (54) and a return hook rod (53); one end of the four push-pull rods (52) are equidistantly hinged on the outer peripheral surface of the nut (51); the other ends of the four push-pull rods (52) are respectively hinged to one of the connecting blocks (55); two opposite surfaces of the connecting block (55) are respectively fixedly connected to the return hook rod (53) and one end of the thin insert rod (54); the other end of the thin insert rod (54) is plugged into the other end of the circular tube (32); the return hook rod (53) contacts the outer side surface of the inner folding plate (6); the nut (51) is threadedly connected to the bidirectional screw rod (7); the push-pull assembly (5) comprises two groups, which are respectively arranged at the two ends of the bidirectional screw rod (7) in a mirror-symmetrical manner; The corner template (1) comprises a triangular plate (11), a right-angle plate (12) and a thick insertion rod (13); the triangular plate (11) is fixedly connected to the upper and lower ends of the right-angle plate (12); the thick insertion rod (13) and the triangular plate (11) are on the same plane; one end of the thick insertion rod (13) is vertically connected to the middle of the hypotenuse of the triangular plate (11); the other end of the thick insertion rod (13) is plugged into the circular tube (32); the number of the corner template (1) and the number of the inner folding plates (6) are both four; the inner folding plates (6) are rotatably connected to the left and right sides of the right-angle plate (12) and connected to adjacent corner templates (1).

2. A foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The inner folding plate (6) is composed of two templates connected by hinges, and the inner folding plate (6) can only be bent toward the side close to the connecting block (55).

3. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The driving mechanism (4) comprises a servo motor (41), a housing, and a worm wheel (43) and a worm (42) meshingly connected in the housing; the servo motor (41) and the housing are fixedly connected to the Pozigzag bracket (3); and the shaft hole of the worm wheel (43) is fixedly sleeved on the bidirectional screw rod (7).

4. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The upper and lower ends of the bidirectional screw rod (7) are fixedly connected to a limiting cylinder (10), and the limiting cylinder (10) is connected to the upper and lower ends of the bidirectional screw rod (7).

5. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The push-pull assembly (5) further comprises a butt plate (2), both ends of which are respectively fixedly connected to one of the connecting blocks (55), and the butt plate (2) is parallel to the bidirectional screw rod (7).

6. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: It also includes a plane plate (8), which is connected to the top or bottom of the Pozigzag bracket (3), and a circular hole is reserved in the middle of the plane plate (8) for the bidirectional screw rod (7) to pass through, and a gap is reserved between the edge of the plane plate (8) and the corner template (1) and the inner folding plate (6).

7. A foldable elevator shaft construction inner formwork according to claim 6, characterized in that: The number of the planar plates (8) is two.

8. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The Pozi bracket (3) further comprises a thrust ball bearing (14), wherein the thrust ball bearing (14) is connected to the Pozi bracket connecting ring (31) below, the axis of the thrust ball bearing (14) coincides with the axis of the Pozi bracket connecting ring (31), and the upper end surface of the thrust ball bearing (14) is rotatably connected to the lower surface of the protrusion (73).

9. The foldable elevator shaft construction inner formwork according to claim 8, characterized in that: It also comprises a protective tube (9), the inner diameter of the protective tube (9) being larger than the outer diameter of the thrust ball bearing (14), and the two ends of the protective tube (9) being respectively fixedly connected between the two groups of the M-shaped bracket connecting rings (31).

10. The foldable elevator shaft construction inner formwork according to claim 1, characterized in that: The shape of the return hook rod (53) is L-shaped.

Images