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 ends and the lower ends of the inner clamping plate fixing blocks, and the outer clamping plates are symmetrically arranged at the upper ends and the lower ends of the outer clamping plate fixing blocks. Every two of the four outer clamping plates form a group, the two groups of outer clamping plates are symmetrically arranged at the upper end and the lower end of the outer clamping plate fixing block, and one group of inner clamping plates and outer clamping plates which are oppositely arranged is locked through a spring bolt. The inner clamping plate and the outer clamping plate are rapidly attached through the spring bolt, and force needed by 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] This utility model belongs to the technical field of building formwork connection devices, and relates to a self-locking connection device for building formwork. Background Technology

[0002] Currently, concrete pouring is widely used in the construction industry, so formwork splicing is required for shaping before pouring concrete.

[0003] Existing template connection devices typically involve workers fixing clamps between two templates. The joint is then secured with steel nails or bolts. However, this method requires workers to perform a significant amount of bolt tightening work, wasting considerable physical effort and time. Utility Model Content

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

[0005] This utility model discloses a self-locking connection device for building formwork, comprising: an inner clamping plate, an outer clamping plate, an inner clamping plate fixing block, an outer clamping plate fixing block, and spring bolts. There are four inner clamping plates, four outer clamping plates, and four spring bolts. The four inner clamping plates are arranged in pairs, with two pairs of inner clamping plates symmetrically arranged at the upper and lower ends of the inner clamping plate fixing block. The four outer clamping plates are also arranged in pairs, with two pairs of outer clamping plates symmetrically arranged at the upper and lower ends of the outer clamping plate fixing block. The opposing pairs of inner and outer clamping plates are locked together by a spring bolt.

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

[0007] Furthermore, the rotating block includes a connecting part and rotating handles symmetrically arranged at both ends of the connecting part, and the connecting part has a through hole at its center.

[0008] Furthermore, the inner clamping plate is provided with a first spring bolt through hole, which is composed of a first central circular through hole and elongated through holes symmetrically arranged at the upper and lower ends of the first central circular through hole. The elongated through holes are connected to the first central circular through hole, and the shape of the elongated through holes matches the shape of the rotating handle so that the rotating block can pass through the first spring bolt through hole of the inner clamping plate.

[0009] Furthermore, the outer clamping plate is provided with a second spring bolt through hole, which is composed of a second central circular through hole and a hexagonal through hole coaxially arranged on both ends of the outer clamping plate. The radius of the second central circular through hole is smaller than the inscribed circle radius of the hexagonal through hole.

[0010] Furthermore, on the end face of the inner clamping plate opposite to the rotating block, two arc-shaped limiting blocks are symmetrically provided on the left and right sides of the first central through hole. The top surface of the arc-shaped limiting block is an arc-shaped inclined surface. The two arc-shaped limiting blocks form a circle and have notches at the top and bottom ends for the rotating handle to pass through. The radius of the circle formed by the two arc-shaped limiting blocks is smaller than the radius of the first central through hole.

[0011] The formwork is clamped between the inner and outer clamping plates. After the rotating block of the spring bolt passes through the second spring bolt through hole, the formwork through hole, and the first spring bolt through hole in sequence, the first nut of the spring bolt is embedded in the hexagonal through hole on the outer clamping plate, thereby restricting the rotation of the spring bolt. The sliding cylinder is limited in the first spring bolt through hole by 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 handles rotate along the arc-shaped inclined surface of the arc-shaped limiting blocks, causing the inner clamping plate to move towards the outer clamping plate. The sliding cylinder and the slider move towards each other, thereby clamping the formwork.

[0012] This utility model discloses a self-locking connection device for building formwork, which can fix wooden formwork, plywood formwork, steel formwork, etc. The spring bolt can adjust the distance between the inner and outer formwork by turning the second nut, which is used to fix formwork of different thicknesses. By rotating the rotating block, the inner and outer clamping plates can be quickly clamped or loosened, thereby reducing the difficulty of manually using a wrench to turn the bolts to clamp the formwork. Attached Figure Description

[0013] Figure 1 This is a perspective view of a self-locking connection device for building templates according to this utility model;

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

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

[0016] Figure 4 It is a 3D view of the inner panel;

[0017] Figure 5 This is the front view of the inner panel;

[0018] Figure 6 This is a structural diagram of the outer clamping plate;

[0019] Figure 7 This is a schematic diagram of the connection structure between the slider and the slide cylinder;

[0020] Figure 8 This is a schematic diagram showing the engagement between the rotating block and the arc-shaped limiting block in the locked state;

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

[0022] like Figure 1 As shown, this utility model discloses a self-locking connection device for building templates, comprising: an inner clamping plate 1, an outer clamping plate 2, an inner clamping plate fixing block 31, an outer clamping plate fixing block 32, and spring bolts 4. Four inner clamping plates 1, four outer clamping plates 2, and four spring bolts 4 are provided. The four inner clamping plates are arranged in pairs, with two pairs of inner clamping plates symmetrically arranged at the upper and lower ends of the inner clamping plate fixing block 31. Similarly, the four outer clamping plates are arranged in pairs, with two pairs of outer clamping plates symmetrically arranged at the upper and lower ends of the outer clamping plate fixing block 32. A pair of inner clamping plates 1 and two pairs of outer clamping plates 2 are locked together by a spring bolt 4.

[0023] like Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the spring bolt 4 includes: a first nut 41, a slider 42, a slide 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. The slider 42 is provided with a groove 421, and the slide cylinder 43 is provided with a slide rail 431. The slide cylinder 43 is slidably disposed outside the slider 42 through the cooperation of the slide rail 431 and the groove 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 slide cylinder 43, respectively. The spring 47 is in a compressed state. The second nut 45 is threadedly connected to the end threaded rod 46 and is disposed 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 slide cylinder 43 and the second nut 45. The rotating block 44 includes a connecting part 441 and rotating handles 442 symmetrically arranged at both ends of the connecting part, and the connecting part has a through hole at its center.

[0024] like Figure 4 and Figure 5 As shown, the inner clamping plate 1 is provided with a first spring bolt through hole, which consists of a first central circular through hole 11 and elongated through holes 13 symmetrically arranged at the upper and lower ends of the first central circular through hole 11. The elongated through holes 13 communicate with the first central circular through hole 11. The shape of the elongated through hole 13 matches the shape of the rotating handle 442 so that the rotating block 44 can pass through the first spring bolt through hole of the inner clamping plate 1.

[0025] like Figure 4 and Figure 8 As shown, 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 block 12 is an arc-shaped inclined surface. The two arc-shaped limiting blocks 12 form a circle and have notches at the top and bottom 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] like Figure 6 As shown, the outer clamping plate 2 is provided with a second spring bolt through hole. The second spring bolt through hole is composed of a second central circular through hole 22 and a hexagonal through hole 21 coaxially arranged on both ends of the outer clamping plate. The radius of the second central circular through hole 22 is smaller than the radius of the inscribed circle of the hexagonal through hole 21.

[0027] When connecting and splicing building templates, first, the edges of two building templates are tightly spliced ​​together, and then the building template is clamped between the inner clamping plate 1 and the outer clamping plate 2. Next, 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. Initially, the rotating handle 442 of the rotating block 44 is in the vertical direction, and the spring 47 is in a compressed state. After the rotating block 44 of the spring bolt 4 passes through the second spring bolt through hole, the template through hole, and the first spring bolt through hole in sequence, the first nut 41 of the spring bolt 4 is embedded in the hexagonal through hole 21 on the outer clamping plate 2, thus restricting the rotation of the spring bolt 4. At this time, the slide cylinder 43 is limited within 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, the inner clamping plate 1 and the outer clamping plate 2 need to be clamped tightly. If the rotating block 44 is rotated clockwise at this time, 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. The sliding cylinder 43 and the slider 42 move towards each other and thus clamp the template. When the template thickness is too large or too small, the second nut 45 can be tightened with a wrench to adjust the spring bolt 4 to the appropriate length.

[0028] When template disassembly is required, simply rotate the rotating block 44 clockwise to reset it. Under the action of the spring 47, the sliding cylinder 43 and the slider 42 will be reset, allowing the inner clamping plate 1 and the outer clamping plate 2 to separate and fall off from the template. Then, the spring bolt 4 can be pulled out to complete the template disassembly.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking connection device for building formwork, characterized in that, include: The device comprises an inner clamping plate, an outer clamping plate, an inner clamping plate fixing block, an outer clamping plate fixing block, and spring bolts. There are four inner clamping plates, four outer clamping plates, and four spring bolts. The four inner clamping plates are arranged in pairs, with two pairs of inner clamping plates symmetrically arranged at the upper and lower ends of the inner clamping plate fixing block. The opposing pairs of inner and outer clamping plates are locked together 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 slide cylinder, a rotating block, a second nut, a threaded rod at the end, and a spring; the first nut is welded to one end of the slider, and the end of the threaded rod at the end is welded to the other end of the slider; the slider has a groove, and the slide cylinder has a rail, and the slide cylinder is slidably disposed outside the slider through the cooperation of the rail and the groove; the spring is sleeved on the threaded rod at the end, and the two ends of the spring are in contact with the inner end faces of the slider and the slide cylinder, respectively, and the spring is in a compressed state; the second nut is threadedly connected to the threaded rod at the end and is disposed at the front end of the threaded rod at the end, and the rotating block is sleeved on the threaded rod at the end and is located between the slide 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 part and rotating handles symmetrically arranged at both ends of the connecting part, and the connecting part has a through hole at its center.

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

5. The self-locking connection device for building formwork according to claim 4, characterized in that, The outer clamp plate is provided with a second spring bolt through hole, which is composed of a second central circular through hole and a hexagonal through hole coaxially set on both ends of the outer clamp plate. The radius of the second central circular through hole is smaller than the radius of the inscribed circle of the hexagonal through hole.

6. The self-locking connection device for building formwork according to claim 5, characterized in that, On the end face opposite to the inner clamping plate and the rotating block, two arc-shaped limiting blocks are symmetrically arranged on the left and right sides of the first central through hole. The top surface of the arc-shaped limiting block is an arc-shaped inclined surface. The two arc-shaped limiting blocks form a circle and have notches at the top and bottom ends for the rotating handle to pass through. The radius of the circle formed by the two arc-shaped limiting blocks is smaller than the radius of the first central through hole. The formwork is clamped between the inner and outer clamping plates. After the rotating block of the spring bolt passes through the second spring bolt through hole, the formwork through hole, and the first spring bolt through hole in sequence, the first nut of the spring bolt is embedded in the hexagonal through hole on the outer clamping plate, thereby restricting the rotation of the spring bolt. The sliding cylinder is limited in the first spring bolt through hole by 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 handles rotate along the arc-shaped inclined surface of the arc-shaped limiting blocks, causing the inner clamping plate to move towards the outer clamping plate. The sliding cylinder and the slider move towards each other, thereby clamping the formwork.

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