Binding spiral coil and production method thereof

Abstract

The invention discloses a binding spiral coil and a production method thereof, and relates to the field of binding appliances, the technical scheme is as follows: the coil is spiral, any coil consists of a section of coil part and a section of blade part, the section of the coil part is circular, the length of the blade part is smaller than that of the coil part, and a blade angle is arranged on one side, close to the axis of the coil, of the blade part; the angle of each blade angle is smaller than 90 degrees and larger than 70 degrees, all the blade angles are located on the same straight line, the coil is sleeved with a ring sleeve, and a plurality of openings corresponding to the blade angles are formed in the ring sleeve. According to the paper tearing device, when the opening is aligned with the blade part, the blade corner is exposed, paper needing to be taken down is rotated, the part, located in the coil, of the paper makes contact with the blade corner, the paper is torn outwards, the contact area of the blade corner and the paper is small, deformation is concentrated at the position where the paper makes contact with the blade corner, and therefore large-area damage to the paper is avoided; and the ring sleeve covers the edge angle, so that the paper is prevented from being damaged due to contact with the edge angle in the page turning process.

Description

Technical Field

[0001] The present invention relates to the field of binding tools, and more particularly to a binding spiral coil and a production method thereof. Background Art

[0002] The binding spiral is a spiral coil used to bind multiple pages of paper into a book. A hole larger than the corresponding hole of the binding spiral is opened on one side of the paper. All the required papers are strung on the binding spiral to form a book. Compared with wire binding, glue binding and other methods, the book formed by spiral binding has the advantage of allowing the papers on both sides to be spread out 180°, which is convenient for placing on a flat surface for reading or writing.

[0003] The existing binding spiral ring can remove the pages of the book by tearing the paper, because its binding structure determines that no residue will be left after the paper is torn, so it will not affect the use of the remaining paper. However, some existing binding spiral rings increase their diameter for their own strength and service life, resulting in greater damage to the paper when tearing.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a binding spiral coil and a production method thereof.

[0006] The above technical purpose of the present invention is achieved through the following technical scheme: a binding spiral coil, including a coil, the coil is spiral, any one circle of the coil is composed of a coil portion and a blade portion, the cross-section of the coil portion is circular, the length of the blade portion is less than the length of the coil portion, and the blade portion is provided with a blade angle on the side close to the coil axis, the angle of the blade angle is less than 90° and greater than 70°, all the blade angles are located on the same straight line, a ring sleeve is provided outside the coil, and a plurality of openings corresponding to the blade angles are opened on the ring sleeve, and the ring sleeve is slidably connected to the coil.

[0007] The present invention is further configured such that: the width of the opening is greater than the diameter of the blade.

[0008] The present invention is further configured as follows: the diameter of the ring portion is greater than the diameter of the blade portion, and the diameter of the ring portion gradually decreases at its end.

[0009] The present invention is further configured as follows: a notch is provided on one side of the annular sleeve away from the coil axis, the notch and the opening are arranged alternately and spaced apart, and the length of the notch is at least two-thirds of the length of the coil.

[0010] The present invention is further configured such that the width of the notch is less than or equal to the diameter of the ring sleeve.

[0011] A method for producing a binding spiral coil comprises the following steps: S1. Locally stretching the metal wire at intervals to form fine parts at equal intervals on the metal wire; S2, bending the wire to form a spiral coil so that the array of details is in the same straight line as the blade; S3, clamp the coil so that the axis of the coil is horizontal and the blade is located at the bottom end of the coil; S4, heating the coil; S5, inserting a first tool for machining a cutting edge into the middle of the coil along the axial direction of the coil, and pressing the first tool downward to deform the cutting edge to form a cutting edge; S6, withdraw the first tool and perform heat treatment on the coil; S7, clamping a spiral plastic tube; S8, heating a second tool for processing the ring sleeve, the second tool cutting an opening on the inner side of the plastic tube, and the second tool cutting a notch on the outer side of the plastic tube to obtain the ring sleeve; S9, cooling the ring sleeve and the coil naturally; S10, spirally sleeve the ring outside the coil.

[0012] The present invention is further configured as follows: in S6, a lubricating coating is applied to the surface of the coil after the heat treatment is completed.

[0013] The present invention is further configured as follows: in said S4, the first tool is preheated, and the heat resistance of the first tool is greater than the heat resistance of the coil.

[0014] The present invention is further configured as follows: in said S9, after waiting for the ring sleeve and the coil to cool down, deburring the two is performed.

[0015] In summary, the present invention has the following beneficial effects: when the opening is aligned with the blade, the blade contacts the outside world, the blade corner is exposed, the paper to be removed is rotated so that the part located inside the coil contacts the blade corner, and the paper is torn outwards. Because the contact area between the blade corner and the paper is small, the pressure is large, and the deformation is concentrated at the place where the paper contacts the blade corner, thereby avoiding large-scale damage to the paper. Under normal conditions, the ring sleeve is rotated so that the ring sleeve covers the blade corner, thereby avoiding damage to the paper caused by contact with the blade corner during the process of turning pages. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 is a schematic structural diagram of a first cutting tool in the present invention; Figure 4It is a schematic diagram of the structure of the fixing frame in the present invention.

[0017] In the figure: 1, ring; 2, blade; 3, blade angle; 4, ring; 5, opening; 6, notch. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Embodiment 1: A binding spiral ring, such as Figure 1 As shown, it includes a coil, which is spiral-shaped. Any coil consists of a coil portion 1 and a blade portion 2. The cross-section of the coil portion 1 is circular. The length of the blade portion 2 is smaller than the length of the coil portion 1. A blade angle 3 is provided on the side of the blade portion 2 close to the coil axis. The angle of the blade angle 3 is less than 90° and greater than 70°. All blade angles 3 are located on the same straight line. A ring sleeve 4 is provided on the outer sleeve of the coil. A plurality of openings 5 ​​corresponding to the blade angles 3 are opened on the ring sleeve 4. The ring sleeve 4 is slidably connected to the coil, and the width of the opening 5 is greater than the diameter of the blade portion 2.

[0020] Specifically, the projection area of ​​the opening 5 is larger than the projection area of ​​the blade corner 3. In the present embodiment, the angle of the blade corner 3 is 85°, so as to prevent the user from being injured when accidentally touching the blade corner 3. The force area between the coil and the paper is reduced while ensuring the safety of the blade corner 3. When the opening 5 is aligned with the blade portion 2, the blade portion 2 is in contact with the outside world, and the blade corner 3 is exposed. The paper to be removed is rotated so that the part located inside the coil is in contact with the blade corner 3, and the paper is torn outward. Because the contact area between the blade corner 3 and the paper is small, the pressure is large, and the deformation is concentrated at the place where the paper contacts the blade corner 3, so as to prevent large-scale damage to the paper. Under normal circumstances, the ring sleeve 4 is rotated so that the ring sleeve 4 covers the blade corner 3, so as to prevent the paper from contacting the blade corner 3 during the process of turning the pages and causing damage to the paper. The length of the ring sleeve 4 is greater than the length of the coil, so as to facilitate the user to control the relative movement of the ring sleeve 4 and the coil.

[0021] like Figure 1 As shown, the diameter of the ring portion 1 is larger than the diameter of the blade portion 2, and the diameter of the ring portion 1 gradually decreases at its end. A slot 6 is provided on the side of the ring sleeve 4 away from the coil axis, and the slots 6 and the openings 5 ​​are alternately arranged. The length of the slot 6 is at least two-thirds of the length of the ring portion 1, and the width of the slot 6 is less than or equal to the diameter of the ring sleeve 4.

[0022] Specifically, there is a diameter difference between the ring portion 1 and the blade portion 2. When the paper slides on the coil while being subjected to an outward pulling force, the diameter difference between the ring portion 1 and the blade portion 2 confines the paper within the blade portion 2. When the paper is removed, an outward pulling force is provided to the paper while the paper slides along the blade portion 2 to cut the paper, further concentrating the deformation. The notch 6 reduces the contact area between the ring sleeve 4 and the coil, and reduces the friction between the ring sleeve 4 and the coil. At the same time, the size of the notch 6 is not enough to separate the ring sleeve 4 from the coil, thereby ensuring the connection stability between the ring sleeve 4 and the coil.

[0023] Embodiment 2: A method for producing a binding spiral ring, such as Figure 1 , Figure 2 , Figure 3 As shown, the following steps are included: S1. Locally stretching the metal wire at intervals to form fine parts at equal intervals on the metal wire; S2, bending the metal wire to form a spiral coil so that the array of details is in the same straight line as the blade 2; S3, clamp the coil so that the axis of the coil is horizontal and the blade 2 is located at the bottom end of the coil; S4, heating the coil; S5, inserting a first tool for machining the edge angle 3 into the middle of the coil along the axial direction of the coil, and pressing the first tool downward to deform the blade portion 2 to form the edge angle 3; S6, withdraw the first tool and perform heat treatment on the coil; S7, clamping a spiral plastic tube; S8, heating the second tool for processing the ring sleeve 4, the second tool cuts an opening 5 on the inner side of the plastic tube, and the second tool cuts a notch 6 on the outer side of the plastic tube to obtain the ring sleeve 4; S9, cooling the ring sleeve 4 and the coil naturally; S10, spirally sleeve the ring sleeve 4 outside the coil.

[0024] Specifically, the metal wire is firstly straightened by a capstan, and stretched to deform a part of the metal wire into a thin part. When the wire is stretched intermittently, the distance between the two thin parts is equal to the length of the loop 1. The metal wire is then bent by a wire forming machine to form a coil. The value of the wire forming machine is set according to the length of the loop 1 and the length of the blade 2, so that all the blades 2 on the coil are located on the same straight line. In this embodiment, the coil is limited by a fixing frame, and the bottom end of the coil is embedded in the fixing frame. The fixing frame and the coil are sent to an electric furnace for heating together, so that the coil is easy to deform and convenient for processing. After taking out the fixing frame, the first tool is horizontally extended into the coil. The first A cutter head is integrally formed at the bottom end of the tool, which presses down the first tool to force the blade 2 to deform and form a blade angle 3. The first tool then rises and then withdraws horizontally. The coil is then heat treated to eliminate stress, and the spiral plastic tube is cut into segments, which are then clamped and fixed. The second tool is a metal cutting wire. The two ends of the second tool are fixed to make it parallel to the axis of the coil. An opening 5 and a notch 6 are cut on the inside and outside of the plastic tube through a hot metal wire cutting process to obtain a ring sleeve 4. The coil and the ring sleeve 4 are collectively cooled naturally at room temperature to improve the material strength. Finally, the coil and the ring sleeve 4 are assembled, and the defective products that cannot be assembled are recycled.

[0025] In S6, a lubricating coating is applied to the surface of the coil after the heat treatment is completed. In S4, a first tool is preheated, and the heat resistance of the first tool is greater than that of the coil. In S9, the ring sleeve 4 and the coil are deburred after they are cooled down. Specifically, in S6, after the coil is cooled down initially, a lubricating coating is applied to the surface of the coil. In this embodiment, the lubricating coating includes polytetrafluoroethylene and molybdenum disulfide, wherein the content of molybdenum disulfide is 8%-10%. Under the premise of ensuring the stability of the lubricating coating, the lubrication effect is improved. The lubricating coating reduces the friction coefficient of the coil surface, so that the relative movement between the ring sleeve 4 and the coil is smoother. In S4, the first tool is preheated first to reduce the temperature difference between the first tool and the coil to avoid changes in the material properties of the coil when it contacts the first tool due to the temperature difference. In S9, the ring sleeve 4 and the coil are deburred after they are cooled down to reduce scratches.

[0026] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A binding spiral ring, characterized in that: The invention comprises a coil, wherein the coil is in a spiral shape, and any one turn of the coil is composed of a coil portion (1) and a blade portion (2), the cross section of the coil portion (1) is circular, the length of the blade portion (2) is smaller than the length of the coil portion (1), a blade angle (3) is provided on the side of the blade portion (2) close to the coil axis, the angle of the blade angle (3) is smaller than 90° and larger than 70°, and all the blade angles (3) are located on the same straight line, and a ring sleeve (4) is provided on the outer sleeve of the coil, and a plurality of openings (5) corresponding to the blade angles (3) are opened on the ring sleeve (4), and the ring sleeve (4) is slidably connected to the coil.

2. The binding spiral ring according to claim 1, characterized in that: The width of the opening (5) is greater than the diameter of the blade (2).

3. The binding spiral ring according to claim 2, characterized in that: The diameter of the ring portion (1) is greater than the diameter of the blade portion (2), and the diameter of the ring portion (1) gradually decreases at its end.

4. The binding spiral ring according to claim 3, characterized in that: A notch (6) is provided on one side of the ring sleeve (4) away from the coil axis, the notch (6) and the opening (5) are arranged alternately and spaced apart, and the length of the notch (6) is at least two thirds of the length of the coil portion (1).

5. The binding spiral ring according to claim 4, characterized in that: The width of the notch (6) is less than or equal to the diameter of the ring sleeve (4).

6. A method for producing a binding spiral coil, applicable to the binding coil according to any one of claims 1 to 5, comprising the following steps: S1. Locally stretching the metal wire at intervals to form fine parts at equal intervals on the metal wire; S2, bending the metal wire to form a spiral coil so that the array of details is in the same straight line as the blade (2); S3, clamping the coil so that the axis of the coil is horizontal and the blade (2) is located at the bottom end of the coil; S4, heating the coil; S5, inserting a first tool for machining the blade angle (3) into the middle of the coil along the axial direction of the coil, and pressing the first tool downward to deform the blade portion (2) to form the blade angle (3); S6, withdraw the first tool and perform heat treatment on the coil; S7, clamping a spiral plastic tube; S8, heating a second tool for processing the ring sleeve (4), the second tool cutting an opening (5) on the inner side of the plastic tube, and the second tool cutting a notch (6) on the outer side of the plastic tube, to obtain the ring sleeve (4); S9, allowing the annular sleeve (4) and the coil to cool naturally; S10, spirally sleeve the ring sleeve (4) outside the coil.

7. The method for producing a binding spiral coil according to claim 6, characterized in that: In S6, a lubricating coating is applied on the surface of the coil after the heat treatment is completed.

8. The method for producing a binding spiral coil according to claim 6, characterized in that: In S4, the first tool is preheated, and the heat resistance of the first tool is greater than the heat resistance of the coil.

9. The method for producing a binding spiral coil according to claim 6, characterized in that: In S9, the ring sleeve (4) and the coil are deburred after they have cooled down.

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