A mandrel tube locking chuck device

Abstract

The present invention discloses a core shaft tube locking chuck device, comprising a support shaft and a first locking chuck and a second locking chuck symmetrically arranged on the support shaft. The first locking chuck and the second locking chuck respectively comprise a sleeve, a plurality of locking clips arranged on the outer circle of the sleeve, a support shaft locking mechanism and a limiting device. The front side of the locking clip is in the shape of a trapezoid or a triangle, which is convenient for inserting into the coil core shaft tube; the rear side of the locking clip is in the shape of a square. When locked with the coil core shaft tube, the upper end face of the rear "square" is embedded in the inner wall of the coil core shaft tube, forming a more secure locking state between the locking chuck and the coil core shaft tube. This device is particularly suitable for the application of waterproof coils using "paper" core shaft tubes in existing waterproof construction equipment.

Description

Technical Field

[0001] The invention relates to a core shaft tube locking chuck device for locking a core shaft tube, in particular to a core shaft tube locking chuck device for positioning and locking a coil core shaft tube. Background Art

[0002] Current waterproofing equipment often faces the problem of being unable to quickly and effectively secure the mandrel tube of the membrane during on-site application. Existing technologies for quickly securing mandrel tubes in waterproofing equipment typically use an expansion shaft to quickly expand and position the membrane mandrel tube. However, the difference between the expansion shaft diameter and the inner diameter of the mandrel tube using this expansion shaft expansion technology typically cannot exceed 10mm—that is, the difference between the inner diameter of the mandrel tube and the outer diameter of the expansion shaft should be ≤10mm. If the difference exceeds 10mm, the maximum inner diameter range of the mandrel tube that can be expanded by this expansion shaft expansion technology is exceeded. Therefore, waterproofing equipment using this expansion shaft expansion technology can only quickly secure and secure membrane mandrel tubes that are not deformed or have minimal deformation. For membrane mandrel tubes that have undergone significant deformation, the expansion shaft cannot be inserted into the mandrel tube, making such severely deformed membranes unsecured. However, in the current production process of waterproof membranes, the membrane core shaft mostly uses a "paper" core shaft tube. After long-distance transportation and on-site lifting, the appearance of the waterproof membrane using the paper core shaft tube usually undergoes severe deformation, resulting in the inability to be used normally by waterproof construction equipment.

[0003] The Chinese utility model patent with authorization announcement number CN 201817121U discloses "a mechanical conical expanding core shaft". This "conical expanding core shaft" has a "conical surface" as its locking working surface for expanding the core shaft tube. The coil core shaft tube is clamped by the "conical surface" of the conical expanding core shaft, and the "friction force" formed between the "conical surface" and the core shaft tube is used to achieve the locking function of the coil core shaft tube. Although this type of "conical expanding core shaft" technology can quickly fix the coil core shaft tube with severe appearance deformation, its locking force is achieved through the friction force generated by the conical locking working surface of the "conical expanding core shaft" on the core shaft tube. The size of the "friction force" here is determined by the pressure exerted by the conical locking working surface of the "conical expanding core shaft" on the core shaft tube. However, on-site waterproofing construction equipment usually uses manpower to roll up and fix the roll material, so the conical locking working surface of the "conical expansion core shaft" is difficult to generate enough pressure on the roll material core shaft tube, and thus the conical locking working surface of the "conical expansion core shaft" cannot generate enough friction on the roll material core shaft tube. When the waterproofing equipment lays the roll material waterproofing layer, slippage occurs between the "conical expansion core shaft" and the roll material core shaft tube, and the required unrolling tension cannot be provided for unrolling the roll material, affecting the laying quality of the roll material waterproofing layer. Summary of the Invention

[0004] The object of the present invention is to provide a core shaft tube locking chuck device, which ensures that the core shaft tube and the construction equipment are always locked and fixed, and is suitable for coiled materials with deformed core shaft tubes.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A mandrel tube locking chuck device comprises a support shaft and a first locking chuck and a second locking chuck symmetrically disposed on the support shaft. The first and second locking chucks have through-holes therein and are symmetrically threaded onto the support shaft. The first and second locking chucks each comprise a sleeve and a plurality of locking clips fixedly mounted on the outer circumference of the sleeve. The sleeve is threaded onto the support shaft and can slide freely left and right on the support shaft; the plurality of locking clips are mounted on the outer circumference of the sleeve along its axial direction.

[0007] In order to ensure that the core shaft tube and the support shaft can better achieve the coaxial positioning function, the number of the multiple locking clips is at least three or more, and they are evenly distributed on the outer circular surface of the sleeve.

[0008] To facilitate processing, the outer dimensions of the multiple locking clips are all the same.

[0009] To facilitate the smooth insertion of the locking chuck into the coil core tube, especially for coils that have undergone on-site deformation, and to achieve a secure and reliable locking effect between the locking chuck and the coil core tube, the outer shape of the locking clip consists of two parts: a trapezoid or triangle on the inner side and a square shape on the outer side. The hypotenuse of the trapezoid or triangle on the inner side of the locking clip is inclined toward the axial center of the sleeve, so that the coil locking chuck can be more easily and quickly inserted into the coil core tube, including a coil core tube that has been severely deformed. The upper end surface of the square shape on the outer side of the locking clip serves as the locking working surface for the locking clip to lock the core tube. The geometric figure formed by the collection of concentric circles on the upper edges of the square shapes on the outer side of the locking clips is a cylinder, and the diameter of the cylinder is greater than or equal to the inner diameter of the coil core tube. Preferably, the cylindrical diameter is ≥ the inner diameter of the coil core tube and ≤ the outer diameter of the coil core tube. At this time, it can ensure that the tightening chuck can be inserted into the core tube more easily. At the same time, its locking clip will be embedded in the inner wall of the coil "paper core tube", achieving a firm and reliable locking effect between the locking chuck and the coil core tube, effectively avoiding the occurrence of coil slippage during equipment construction.

[0010] In order to realize the torque transmission function between the support shaft and the core shaft tube or the positioning function of the core shaft tube in the left and right directions on the support shaft, a support shaft locking mechanism is also fixedly installed on the sleeve. The support shaft locking mechanism can realize positioning locking with the support shaft to limit the locking chuck from sliding left and right on the support shaft or rotating relative to the support shaft.

[0011] In order to prevent the end faces on both sides of the coil from exceeding the outermost end face of the locking chuck and to better realize the positioning of the core shaft tube on the support shaft, a limit baffle whose outer dimensions are larger than the diameter of the core shaft tube is also provided on the locking chuck. The limit baffle is fixedly installed on the outer end face of the locking clip or the outer circular surface of the sleeve outside the locking clip along the cross-sectional direction of the sleeve.

[0012] Beneficial effects of the present invention:

[0013] The present invention adopts a locking chuck in the form of a locking clip to fix and lock the coil core shaft tube. Compared with the traditional expansion shaft, it not only has a simpler structure, but also overcomes the defect that the existing expansion shaft technology is difficult to penetrate into the coil core shaft tube that has been deformed, and its practicality and applicability are greatly improved. The trapezoidal or triangular hypotenuse design on the inner side of the locking clip of the present invention can make it easier to quickly insert the coil locking clip into the coil core tube, including the coil whose coil core tube is severely deformed; the cylindrical diameter formed by the concentric circles on the upper edge of the square shape of the outer side of the locking clip is ≥ the inner diameter of the coil core tube and ≤ the outer diameter of the coil core tube, so when the locking clip of the present invention is completely inserted into the coil core tube, the upper end surface of the square part of the locking clip will be embedded in the inner wall of the coil "paper core tube", achieving a firm and reliable locking effect between the coil and the locking clip. Compared with the existing "conical clip", it effectively overcomes the "slipping" phenomenon between the coil and the "conical clip" caused by the small friction between the conical clip and the coil core tube, and can effectively ensure the continuous and normal operation of the waterproof construction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the core shaft tube locking chuck device of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention after positioning and locking with the core shaft tube;

[0016] Figure 3 It is a schematic structural diagram of the locking chuck of the present invention;

[0017] Figure 4 yes Figure 3 A-direction view.

[0018] Figure numbers and names:

[0019] 1--First locking chuck, 2--Second locking chuck, 3--Support shaft, 4--Core shaft tube, 11--Sleeve, 12--Locking clip, 13--Support shaft locking mechanism, 131--Locking top screw, 132--Top screw hole, 14--Limit baffle. DETAILED DESCRIPTION

[0020] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the core shaft tube locking chuck device includes a support shaft 3 and a first locking chuck 1 and a second locking chuck 2 respectively arranged on the support shaft.

[0021] The first locking chuck 1 and the second locking chuck 2 respectively include a sleeve 11 and a plurality of locking clips 12 of the same size arranged on the sleeve 11 , a support shaft locking mechanism 13 and a limit baffle 14 .

[0022] The sleeve 11 is sleeved on the support shaft 3 , and there is a clearance fit between the sleeve 11 and the support shaft 3 , and the sleeve 11 can slide freely left and right on the support shaft 3 .

[0023] Four locking clips 12 of equal size are fixedly mounted perpendicularly along the sleeve axis on the outer end surface of the sleeve 11 and are evenly distributed on the outer end surface of the sleeve 11. The outer shape of the locking clips 12 consists of a trapezoidal shape on the inside and a square shape on the outside. The hypotenuse of the trapezoid on the inside of the locking clip 12 is inclined toward the axis of the support shaft along its inside direction. The geometric figure formed by the collection of concentric circles at the outermost edges of the upper end surfaces of the square portions on the outside of the multiple locking clips 12 is a cylinder, the diameter of which is greater than or equal to the inner diameter of the coil core tube 4 and less than or equal to the outer diameter of the coil core tube 4. To reduce resistance during the insertion of the locking clip into the coil core tube, the outer square upper end surface of the locking clip 12 is sharpened.

[0024] The support shaft locking mechanism 13 comprises a locking jackscrew 131 and a jackscrew hole 132 located outside the sleeve 11. The locking jackscrew 131 is screwed into the jackscrew hole 132 and tightened to hold the support shaft, thereby achieving a positional locking between the locking chuck and the support shaft 3, thereby restricting the locking chuck from sliding left or right on the support shaft 3 or rotating relative to the support shaft 3. The support shaft locking mechanism 13 can also comprise a smooth axis quick locking device comprising a tapered sleeve and steel balls (existing technology, which will not be further described here). If a quick locking device comprising a tapered sleeve and steel balls is used, the support shaft 3 should be smooth axis.

[0025] The limiting baffle 14 is fixedly mounted on the outermost end surface of the locking clip 12 along the cross-sectional direction of the sleeve 11 , and the outer dimensions of the limiting baffle 14 are larger than the outer diameter of the core shaft tube.

[0026] The operation process of the mandrel tube locking chuck device for positioning and locking the coil mandrel tube 4 is as follows: ① By tightening the locking screw 131 on the first locking chuck 1, the first locking chuck 1 is locked and fixed in a suitable position on one side of the support shaft 3; ② The second locking chuck 2 is removed from the support shaft 3, and the support shaft 3 is inserted into the mandrel tube 4 from the end where the second locking chuck 2 was removed, and the first locking chuck 1 fixed to the support shaft 3 is pressed into the diameter of the coil mandrel tube 4; ③ The second locking chuck 2 is then reinstalled on the support shaft 3 and pressed into the diameter of the other end of the coil mandrel tube 4; at the same time, the second locking chuck 2 is locked to the support shaft 3. At this point, the mandrel tube locking chuck device completes the operation process of positioning and locking the coil mandrel tube 4.

[0027] It should be noted that the directional terms such as "inside" and "outside" mentioned in this article refer to the direction of the locking chuck compared to the locked paper core shaft. The side where the locking chuck is inserted into the paper core shaft is "inside" and the opposite direction is "outside"; the "left" and "right" mentioned in this article are compared to the direction that is the same as the axial direction of the support shaft. Facing the support shaft, the left direction is "left" and the opposite is "right"; the "up" and "down" mentioned in this article are compared to the axial centerline direction of the locking chuck. The side close to the "axial centerline" is "down" and the opposite direction is "up".

[0028] It should be understood that the above-mentioned directional nouns 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 orientation or a specific directional structure and operation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0029] The above embodiment is limited to a detailed description of one possible specific implementation method of the present invention, and does not include all possible implementation methods under the technical solution of the present invention. Any modification or partial replacement of this embodiment with reference to the technical solution of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A core shaft tube locking chuck device for waterproofing membrane, comprising a first locking chuck (1), a second locking chuck (2) and a support shaft (3), wherein the first locking chuck (1) and the second locking chuck (2) are provided with through holes therein and are respectively symmetrically sleeved on the support shaft (3), characterized in that: The first locking chuck (1) and the second locking chuck (2) respectively comprise a sleeve (11) that is sleeved on the support shaft (3) and a plurality of locking clips (12) that are fixedly mounted on the outer circle of the sleeve (11) along the axial direction of the sleeve (11), wherein the maximum outer diameter of the locking clip (12) is greater than the inner diameter of the core shaft tube, and the outer shape of the locking clip (12) consists of two parts: an inner trapezoid or triangle and an outer square shape, wherein the hypotenuse of the inner trapezoid or triangle of the locking clip (12) is inclined toward the axial center direction of the sleeve (11), and the outer square end face of the locking clip (12) is sharpened.

2. The core shaft tube locking chuck device for waterproof membrane according to claim 1, characterized in that: The number of the locking clips (12) is at least three and they are evenly distributed on the outer circular end surface of the sleeve (11).

3. The core shaft tube locking chuck device for waterproof membrane according to claim 1, characterized in that: The outer dimensions of the multiple locking clips (12) are all the same.

4. The core shaft tube locking chuck device for waterproof membrane according to claim 1, characterized in that: The geometric figure formed by the collection of concentric circles on the upper edges of the square shape on the outer sides of the plurality of locking clips (12) is a cylinder, and the diameter of the cylinder is greater than or equal to the inner diameter of the core shaft tube (4).

5. The core shaft tube locking chuck device for waterproof membrane according to claim 4, characterized in that: The cylindrical diameter is less than or equal to the outer diameter of the core shaft tube (4).

6. The core shaft tube locking chuck device for waterproof membrane according to claim 1, characterized in that: A support shaft locking mechanism (13) is fixedly mounted on the sleeve (11), and the support shaft locking mechanism (13) can be positioned and locked with the support shaft (3).

7. The core shaft tube locking chuck device for waterproof membrane according to claim 6, characterized in that: The support shaft locking mechanism (13) comprises a locking top screw (131) and a top screw screw hole (132) located on the sleeve (11); the locking top screw (131) is screwed into the top screw screw hole (132) and supports the support shaft.

8. A core shaft tube locking chuck device for waterproof membrane according to any one of claims 1 to 7, characterized in that: The locking chuck is further provided with a limit baffle (14), which is fixedly mounted on the outer end surface of the locking clip (12) or the outer circumferential surface of the sleeve (11) outside the locking clip (12) along the cross-sectional direction of the sleeve (11).

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