Anti-slip grip

Abstract

To provide a grip anti-slip device that can tightly and seamlessly adhere to grips of various thicknesses and shapes, while also offering excellent anti-slip performance and easy length adjustment to suit different items. [Solution] The device comprises a cylindrical core material (1) formed by spirally winding a resin strip, and a shrinkable cylindrical anti-slip portion (2) covering its outer circumference. The shrinkage rate of the anti-slip portion (2) is set to 42% or more, and at least one of embossing or debossing is applied to its surface, and a plurality of concave lines (3) are formed at regular intervals along the circumferential direction of the anti-slip portion (2).

Description

Technical Field

[0001] The present invention relates to an anti-slip device for a grip (holding part) attached to sports equipment, tools, daily necessities, etc.

Background Art

[0002] Conventionally, as an anti-slip device for a grip, there is known one in which an elastic plastic cover is disposed on the outer periphery of a core material wound in a spiral shape (for example, Utility Model Registration No. 3225963).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional configuration, since the shrinkage rate was limited, there were cases where the adhesion was insufficient for irregularly shaped grips with a large diameter change or extremely thin grips. Also, although the grip length varies depending on the article to be attached, it was difficult for the user to accurately adjust (cut) the length by hand with the conventional anti-slip device, and there was a problem that the cut end was disordered and the appearance was damaged.

Means for Solving the Problems

[0005] The grip anti-slip device of this invention comprises a core material portion formed into a cylindrical shape by spirally winding a resin strip, and a cylindrical anti-slip portion covering its outer circumference with a shrinkage rate of 42% or more. The surface of the anti-slip portion is subjected to at least one of embossing or debossing as an anti-slip treatment, and a plurality of concave lines are formed at regular intervals along the circumferential direction of the anti-slip portion. The core material portion is responsible for maintaining the shape of the anti-slip portion before installation, and the circumferential lines function as a cutting guide when the user adjusts to the desired length. Furthermore, the anti-slip portion of this invention has anisotropic shrinkage characteristics in which only the radial direction shrinks when the core material portion is removed, and there is almost no change in axial (lengthwise) dimensions. This makes it possible to accurately maintain the length dimension adjusted along the cutting guide even after installation. [Effects of the Invention]

[0006] Firstly, because the anti-slip portion has a high shrinkage rate of 42% or more, it can tightly and seamlessly adhere to extremely thin grips and irregularly shaped grips with significant changes in diameter. This provides excellent versatility, allowing a single product size to accommodate grips of an extremely wide range of diameters and shapes.

[0007] Secondly, the circumferential lines formed on the surface of the anti-slip portion function as cutting guides, allowing for easy and straight cutting to the optimal length for the item using a utility knife or scissors. In this process, the anti-slip portion of this invention undergoes almost no axial (lengthwise) dimensional change due to shrinkage, resulting in extremely high installation accuracy, allowing users to complete the installation precisely to the length they intended.

[0008] Thirdly, because it employs a room-temperature shrinkage method where the core material shrinks when pulled out, there is no need to prepare a heat source such as a heat gun or hair dryer, as with conventional heat shrink tubing. This makes it possible for anyone to safely and quickly install the tubing, even outdoors where there is no power source or in places where open flames are strictly prohibited. [Brief explanation of the drawing]

[0009] [Figure 1] This is an overall perspective view showing a state in which a cylindrical anti-slip portion is covered on the outer circumference of a spirally wound core portion, according to one embodiment of the present invention. [Figure 2] This is an exploded perspective view showing the state before the anti-slip portion of the present invention is covered with the core material. [Figure 3] This figure shows the anti-slip portion of the present invention attached to an irregularly shaped grip with a rapidly changing diameter, and in a contracted state. [Figure 4] A reference enlarged cross-sectional view showing the embossing and debossing applied to the surface of the anti-slip area. [Figure 5] This diagram illustrates how to adjust the length of the anti-slip surface using a cutting tool, following the concave lines on the surface. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described in detail with reference to the drawings.

[0011] Embodiments of the present invention will be described in detail with reference to the drawings. First, the overall structure will be described. Figure 1 is an overall perspective view of one embodiment of the present invention, and Figure 2 is an exploded perspective view showing the state before the anti-slip portion is covered with the core material portion. As shown in Figures 1 and 2, the grip anti-slip device of the present invention has a double structure consisting of an inner core material portion (1) and a cylindrical anti-slip portion (2) that covers its outer circumference.

[0012] The core material (1) is made by tightly winding a relatively rigid resin strip, such as polyethylene or polypropylene, in a spiral shape to maintain a cylindrical form. This core material (1) supports the force that causes the outer anti-slip layer (2) to contract from the inside, and plays a role in maintaining the cylindrical shape of the product before installation.

[0013] Next, the anti-slip portion (2) and its shrinkage rate will be described. The anti-slip portion (2) is made of an elastic material such as an elastomer or silicone resin that shrinks at room temperature, and its shrinkage rate is set to 42% or more. Preferably it is 50% or more, and more preferably in the range of 60% to 80%. As shown in Figure 3, the anti-slip portion (2) of this invention is used by attaching it to an irregularly shaped grip (6) with a large change in diameter and shrinking it. In this invention, a high shrinkage rate of 42% or more is ensured, so even with a tapered shape where the diameter changes abruptly from a thick part to a thin part, as shown in Figure 3, or an irregularly shaped grip (6) with steps or irregularities on the surface, the anti-slip portion (2) can flexibly follow the complex external shape without any problems and adhere firmly without gaps.

[0014] In this invention, the configuration in which the shrinkage rate of the anti-slip portion (2) is specified as 42% or more will be explained using specific numerical values. For example, if the inner diameter of the anti-slip portion (2) before installation is 55 mm, setting the shrinkage rate to 42% will result in an inner diameter of approximately 23 mm at maximum contraction. The grip diameter of a typical tennis racket or baseball bat is usually around 25 mm to 32 mm, but there are also cases where the diameter is less than 25 mm for the handle (thin part) of a bat, a cane, a fishing rod, etc. According to this invention, while securing a relatively large insertion diameter of 55 mm, the high shrinkage rate of 42% or more allows it to be narrowed to 23 mm or less, so that it can be tightly fitted even to extremely thin grips (6) without loosening. Thus, the configuration of this invention offers versatility, as it can achieve an extremely high level of fit without loosening or gapping, even when the object is an irregularly shaped grip (6) with extremely thin parts or abrupt changes in diameter, using the same product size across the board.

[0015] Furthermore, the anti-slip portion (2) of this invention has a high shrinkage rate of 42% or more in the radial direction, while its shrinkage rate in the axial direction (length direction) is extremely low, resulting in virtually no change in length. By suppressing the "longitudinal shrinkage" seen in typical heat-shrinkable tubing, it is possible to accurately maintain the dimensions after installation, even after cutting according to the guidelines (3) described later.

[0016] The surface treatment and the configuration of the lines will be described. Fig. 4 is an enlarged reference cross-sectional view showing the surface treatment of the anti-slip portion (2). On the surface of the anti-slip portion (2), there is a fine convex embossing (4) shown in Fig. 4(A) or a fine concave debossing (5) shown in Fig. 4(B), which enhances the frictional force. These may be mixed or used for expressions such as logo marks. Further, on the outer peripheral surface of the anti-slip portion (2), a plurality of concave lines (3) are formed at regular intervals (for example, at intervals of 5 mm to 10 mm) along the circumferential direction perpendicular to the axial direction. This line (3) functions as a guide during cutting, and after mounting, it also functions as an anti-slip member that causes a "catch" such as a fingertip held as a deeper groove and physically suppresses the displacement of the hand in the axial direction.

[0017] The usage method and the length adjustment will be described. As shown in Fig. 5, the user can cut straight by checking the grip length of the article and applying a cutting tool to a desired line (3) on the surface of the anti-slip portion (2). After cutting, insert the tool into the grip (6) and pull out the extraction end portion (1a) of the core material portion (1), so that the anti-slip portion (2) shrinks at room temperature and is fixed to the surface of the grip (6). Note that a method of fixing it to the grip (6) in advance without cutting first and then cutting off the unnecessary portion along the line (3) may also be used.

Explanation of reference numerals

[0018] 1 Core material portion 1a Extraction end portion 2 Anti-slip portion 3 Line 4 Embossing 5 Debossing 6 Grip

Claims

1. A grip anti-slip device comprising a core material portion formed into a cylindrical shape by spirally winding a resin strip, and a retractable cylindrical anti-slip portion attached to cover the outer circumference of the core material portion, characterized in that the shrinkage rate of the anti-slip portion is 42% or more.

2. The grip anti-slip device according to claim 1, characterized in that the surface of the anti-slip portion is subjected to at least one of embossing and debossing.

3. The gripping device according to claim 1, characterized in that a plurality of concave lines are formed on the surface of the anti-slip portion at regular intervals along the circumferential direction of the anti-slip portion.

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