Self-locking connecting device for building templates

Abstract

The building formwork self-locking connecting device comprises four inner clamping plates, four outer clamping plates, four inner clamping plate fixing blocks, four outer clamping plate fixing blocks and four spring bolts, every two of the four inner clamping plates form a group, the two groups of inner clamping plates are symmetrically arranged at the upper end and the lower end of each inner clamping plate fixing block, and every two of the four outer clamping plates form a group. The two outer clamping plates are symmetrically arranged at the upper end and the lower end of the outer clamping plate fixing block, and one inner clamping plate and one outer clamping plate which are oppositely arranged are locked through a spring bolt. The inner clamping plate and the outer clamping plate are quickly attached through the spring bolt, and the force needed for manually tightening a common nut to enable the inner clamping plate and the outer clamping plate to be clamped is reduced. The device is simple in structure, convenient to mount and dismount, and capable of fixing building templates of various models.

Description

Technical Field

[0001] The present invention belongs to the technical field of building formwork connection devices and relates to a self-locking connection device for building formwork. Background Art

[0002] At present, concrete pouring construction is widely used in the field of building construction. Therefore, before pouring concrete, formwork splicing is required for shaping.

[0003] For existing formwork connection devices, workers usually fix clamps between two formwork panels. Then, steel nails or bolts are used for clamping and fixing to achieve the splicing effect. However, such a splicing method requires workers to perform a large amount of bolt tightening work, wasting a lot of physical strength and time of the workers. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-locking connection device for building formwork to avoid the problem that existing formwork splicing devices require workers to use wrenches to tighten bolts, which is time-consuming and laborious.

[0005] The self-locking connection device for building formwork of the present invention includes: inner clamping plates, outer clamping plates, inner clamping plate fixing blocks, outer clamping plate fixing blocks, and spring bolts. There are four inner clamping plates, outer clamping plates, and spring bolts each. Two of the four inner clamping plates form a group, and the two groups of inner clamping plates are symmetrically arranged at the upper and lower ends of the inner clamping plate fixing block. Two of the four outer clamping plates form a group, and the two groups of outer clamping plates are symmetrically arranged at the upper and lower ends of the outer clamping plate fixing block. A set of relatively arranged inner and outer clamping plates is locked by a spring bolt.

[0006] Further, the spring bolt includes: a first nut, a slider, a sliding cylinder, a rotating block, a second nut, an end head threaded rod, and a spring; the first nut is welded to one end of the slider, and the end of the end head threaded rod is welded to the other end of the slider; a chute is provided on the slider, and a slide rail is provided on the sliding cylinder. The sliding cylinder is slidably arranged outside the slider through the cooperation of the slide rail and the chute; the spring is sleeved on the end head threaded rod, and both ends of the spring are in contact with the inner end faces of the slider and the sliding cylinder respectively, and the spring is in a compressed state; the second nut is threadedly connected to the end head threaded rod and is arranged at the front end of the end head threaded rod, and the rotating block is sleeved on the end head threaded rod and is located between the sliding cylinder and the second nut.

[0007] Further, the rotating block includes a connecting portion and rotating handles symmetrically arranged at both ends of the connecting portion. A through hole is provided at the center of the connecting portion.

[0008] Further, a first spring bolt through-hole is provided on the inner clamping plate. The first spring bolt through-hole is composed of a first central circular through-hole and long through-holes symmetrically arranged at the upper and lower ends of the first central circular through-hole. The long through-holes communicate with the first central circular through-hole, and the shape of the long through-holes matches the shape of the rotating handle for the rotating block to pass through the first spring bolt through-hole of the inner clamping plate.

[0009] Further, a second spring bolt through-hole is provided on the outer clamping plate. The second spring bolt through-hole is composed of a second central circular through-hole coaxially arranged on the two end faces of the outer clamping plate and a hexagonal through-hole. The radius of the second central circular through-hole is smaller than the inscribing circle radius of the hexagonal through-hole.

[0010] Further, on the end face of the inner clamping plate opposite to the rotating block, two arc-shaped limiting blocks are symmetrically arranged on the left and right sides of the first central circular through-hole. The top surface of the arc-shaped limiting block is an arc-shaped inclined surface. The two arc-shaped limiting blocks enclose a circle and have gaps at the upper and lower ends for the rotating handle to pass through. The radius of the circle enclosed by the two arc-shaped limiting blocks is smaller than the radius of the first central circular through-hole.

[0011] When the building formwork is clamped between the inner clamping plate and the outer clamping plate, after the rotating block of the spring bolt sequentially passes through the second spring bolt through-hole, the formwork through-hole, and the first spring bolt through-hole, the first nut of the spring bolt is embedded in the hexagonal through-hole on the outer clamping plate to limit the rotation of the spring bolt. The sliding cylinder is limited in the first spring bolt through-hole by the two arc-shaped limiting blocks. When the rotating block rotates clockwise, the two arc-shaped limiting blocks limit the rotation of the rotating handle at the upper and lower ends of the rotating block. When the rotating block rotates counterclockwise, the rotating handle rotates along the arc-shaped inclined surface of the arc-shaped limiting block to drive the inner clamping plate to move towards the outer clamping plate, and the sliding cylinder and the slider move towards each other to clamp the formwork.

[0012] The building formwork self-locking connection device of the present invention can fix wooden formwork, glued formwork, steel formwork, etc. The spring bolt can adjust the distance between the inner and outer formworks by twisting the second nut to fix formworks of different thicknesses. By rotating the rotating block, the rapid clamping or loosening between the inner clamping plate and the outer clamping plate can be realized, so as to reduce the difficulty of manually using a wrench to twist the bolt to clamp the formworks. Description of the Drawings

[0013] Figure 1 is a perspective view of the building formwork self-locking connection device of the present invention;

[0014] Figure 2 is a structural schematic diagram of the spring bolt;

[0015] Figure 3 is a sectional view of the spring bolt;

[0016] Figure 4 is a perspective view of the inner clamping plate;

[0017] Figure 5 It is the front view of the inner splint;

[0018] Figure 6 It is the structural schematic diagram of the outer splint;

[0019] Figure 7 It is the structural schematic diagram of the connection between the slider and the sliding cylinder;

[0020] Figure 8 It is the matching schematic diagram of the rotating block and the arc-shaped limiting block in the locked state;

[0021] 1 - Inner splint; 11 - First central circular through-hole; 12 - Arc-shaped limiting block; 13 - Long through-hole; 2 - Outer splint; 21 - Hexagonal through-hole; 22 - Second central circular through-hole; 31 - Inner splint fixing block; 32 - Outer splint fixing block; 4 - Spring bolt; 41 - First nut; 42 - Slider; 421 - Chute; 43 - Sliding cylinder; 431 - Slide rail; 44 - Rotating block; 441 - Connecting part; 442 - Rotating handle; 45 - Second nut; 46 - End head threaded rod; 47 - Spring. Detailed implementation manners

[0022] As Figure 1 shown, the self-locking connection device for building templates of the present invention includes: an inner splint 1, an outer splint 2, an inner splint fixing block 31, an outer splint fixing block 32, and a spring bolt 4. There are four of each of the inner splint 1, the outer splint 2, and the spring bolt 4. The four inner splints are grouped in pairs, and the two groups of inner splints are symmetrically arranged at the upper and lower ends of the inner splint fixing block 31. The four outer splints are grouped in pairs, and the two groups of outer splints are symmetrically arranged at the upper and lower ends of the outer splint fixing block 32. A pair of relatively arranged inner splint 1 and outer splint 2 are locked by a spring bolt 4.

[0023] As Figure 2 、 Figure 3 、 Figure 7 and Figure 8As shown in the figure, the spring bolt 4 includes: a first nut 41, a slider 42, a sliding cylinder 43, a rotating block 44, a second nut 45, an end threaded rod 46, and a spring 47. The first nut 41 is welded to one end of the slider 42, and the end of the end threaded rod 46 is welded to the other end of the slider 42. A chute 421 is provided on the slider 42, and a slide rail 431 is provided on the sliding cylinder 43. The sliding cylinder 43 is slidably arranged outside the slider 42 through the cooperation of the slide rail 431 and the chute 421. The spring 47 is sleeved on the end threaded rod 46, and both ends of the spring 47 are in contact with the inner end faces of the slider 42 and the sliding cylinder 43 respectively, and the spring 47 is in a compressed state. The second nut 45 is threadedly connected to the end threaded rod 46 and is arranged at the front end of the end threaded rod 46. The rotating block 44 is sleeved on the end threaded rod 46 and is located between the sliding cylinder 43 and the second nut 45. The rotating block 44 includes a connecting portion 441 and rotating handles 442 symmetrically arranged at both ends of the connecting portion. A through hole is provided at the center of the connecting portion.

[0024] As Figure 4 and Figure 5 shown in the figure, a first spring bolt through hole is provided on the inner clamping plate 1. The first spring bolt through hole is composed of a first central circular through hole 11 and long through holes 13 symmetrically arranged at the upper and lower ends of the first central circular through hole 11. The long through holes 13 are communicated with the first central circular through hole 11. The shape of the long through holes 13 matches the shape of the rotating handle 442 for the rotating block 44 to pass through the first spring bolt through hole of the inner clamping plate 1.

[0025] As Figure 4 and Figure 8 shown in the figure, on the end face of the inner clamping plate 1 opposite to the rotating block 44, two arc-shaped limiting blocks 12 are symmetrically arranged on the left and right sides of the first central circular through hole 11. The top surface of the arc-shaped limiting blocks 12 is an arc-shaped inclined surface. The two arc-shaped limiting blocks 12 enclose a circle and have gaps at the upper and lower ends for the rotating handle 442 to pass through. The radius of the circle formed by the two arc-shaped limiting blocks 12 is smaller than the radius of the first central circular through hole 11.

[0026] As Figure 6 shown in the figure, a second spring bolt through hole is provided on the outer clamping plate 2. The second spring bolt through hole is composed of a second central circular through hole 22 coaxially arranged on the two end faces of the outer clamping plate and a hexagonal through hole 21. The radius of the second central circular through hole 22 is smaller than the inscribed circle radius of the hexagonal through hole 21.

[0027] When connecting and splicing construction templates, first closely splice the edges of two construction templates together, and then clamp the construction templates between the inner clamping plate 1 and the outer clamping plate 2. After that, the top of the spring bolt 4 needs to be aligned with the hexagonal through hole 21 of the outer clamping plate 2 and the second central circular through hole 22 of the spring bolt. In the initial state, the rotating handle 442 of the rotating block 44 is in the vertical direction, and the spring 47 is in a compressed state. When the rotating block 44 of the spring bolt 4 sequentially passes through the second spring bolt through hole, the template through hole and the first spring bolt through hole, the first nut 41 of the spring bolt 4 is embedded in the hexagonal through hole 21 on the outer clamping plate 2 to restrict the rotation of the spring bolt 4. At this time, the sliding cylinder 43 is limited in the first spring bolt through hole by two arc-shaped limiting blocks 12. After the rotating block 44 passes through the inner clamping plate 1, it is necessary to firmly clamp the inner clamping plate 1 and the outer clamping plate 2. At this time, if the rotating block 44 is rotated clockwise, the two arc-shaped limiting blocks 12 will limit the rotation of the rotating handles 442 at the upper and lower ends of the rotating block 44. If the rotating block 44 is rotated counterclockwise, the rotating handle 442 will rotate along the arc-shaped inclined surface of the arc-shaped limiting block 12 and drive the inner clamping plate 1 to move towards the outer clamping plate 2, and the sliding cylinder 43 and the slider 42 will move towards each other to clamp the template. When the template thickness is too large or too small, the second nut 45 can be turned with a wrench to adjust the spring bolt 4 to an appropriate length.

[0028] When the template needs to be disassembled, just rotate the rotating block 44 clockwise to reset the rotating block 44. Under the action of the spring 47, the sliding cylinder 43 and the slider 42 will be reset, causing the inner clamping plate 1, the outer clamping plate 2 and the template to separate and fall off, and the spring bolt 4 can be withdrawn to complete the template disassembly.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Self-locking connection device for building formwork, characterized in that, Including: Inner splints, outer splints, inner splint fixing blocks, outer splint fixing blocks and spring bolts. There are four of each of the inner splints, outer splints and spring bolts. The four inner splints are grouped in pairs, and the two groups of inner splints are symmetrically arranged at the upper and lower ends of the inner splint fixing block. The four outer splints are grouped in pairs, and the two groups of outer splints are symmetrically arranged at the upper and lower ends of the outer splint fixing block. A pair of relatively arranged inner splints and outer splints are locked by a spring bolt.

2. The self-locking connection device for building formwork according to claim 1, characterized in that, The spring bolt includes: a first nut, a slider, a sliding cylinder, a rotating block, a second nut, an end head threaded rod and a spring; the first nut is welded to one end of the slider, and the end of the end head threaded rod is welded to the other end of the slider; a chute is provided on the slider, and a slide rail is provided on the sliding cylinder. The sliding cylinder is slidably arranged outside the slider through the cooperation of the slide rail and the chute; the spring is sleeved on the end head threaded rod, and the two ends of the spring are respectively in contact with the inner end faces of the slider and the sliding cylinder, and the spring is in a compressed state; the second nut is threadedly connected to the end head threaded rod and is arranged at the front end of the end head threaded rod, and the rotating block is sleeved on the end head threaded rod and is located between the sliding cylinder and the second nut.

3. The self-locking connection device for building formwork according to claim 2, characterized in that, The rotating block includes a connecting portion and rotating handles symmetrically arranged at both ends of the connecting portion. A through hole is provided at the center of the connecting portion.

4. The self-locking connection device for building formwork according to claim 3, characterized in that, A first spring bolt through hole is provided on the inner splint. The first spring bolt through hole is composed of a first central circular through hole and long through holes symmetrically arranged at the upper and lower ends of the first central circular through hole. The long through holes are communicated with the first central circular through hole. The shape of the long through hole matches the shape of the rotating handle for the rotating block to pass through the first spring bolt through hole of the inner splint.

5. The self-locking connection device for building formwork according to claim 4, wherein, A second spring bolt through hole is provided on the outer splint. The second spring bolt through hole is composed of a second central circular through hole coaxially arranged on the two end faces of the outer splint and a hexagonal through hole. The radius of the second central circular through hole is smaller than the inscribed circle radius of the hexagonal through hole.

6. The self-locking connection device for building formwork according to claim 5, wherein, On the end face of the inner splint opposite to the rotating block, two arc-shaped limiting blocks are symmetrically arranged on the left and right sides of the first central circular through hole. The top surface of the arc-shaped limiting block is an arc-shaped inclined surface. The two arc-shaped limiting blocks enclose a circle and have gaps at the upper and lower ends for the rotating handle to pass through. The radius of the circle enclosed by the two arc-shaped limiting blocks is smaller than the radius of the first central circular through hole; When the building formwork is clamped between the inner splint and the outer splint, when the rotating block of the spring bolt sequentially passes through the second spring bolt through hole, the formwork through hole and the first spring bolt through hole, the first nut of the spring bolt is embedded in the hexagonal through hole on the outer splint to limit the rotation of the spring bolt, and the sliding cylinder is limited in the first spring bolt through hole by the two arc-shaped limiting blocks; when the rotating block rotates clockwise, the two arc-shaped limiting blocks limit the rotation of the rotating handles at the upper and lower ends of the rotating block; when the rotating block rotates counterclockwise, the rotating handle rotates along the arc-shaped inclined surface of the arc-shaped limiting block to drive the inner splint to move towards the outer splint side, and the sliding cylinder and the slider move towards each other to clamp the formwork.

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