JPH0610202Y2 - Hinge structure of tubular resin products - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a hinge structure for a tubular resin product, and in particular, for a tubular resin product in which the outer periphery is brought into contact with an outer member to be used as a cushioning material, etc. The present invention relates to a hinge structure suitable for fitting the hinge portion into the member without hitting.

(Prior Art) For example, as shown in FIG. 9, when a refueling pipe a protruding from a fuel tank is inserted into a vehicle body d, a refueling port b of the refueling pipe a and a body d are brought into contact with each other. Not only the vibration of the body d is directly transmitted to the refueling pipe a, but also in the event of an accident, the refueling pipe a is damaged by the body d and the refueling lid c provided on the refueling port b is blown off by the impact. Since there is a danger that fuel leakage will occur, the applicant of the present application filed a device for protecting it by wrapping it around the outer periphery of the filler port b with a cylindrical resin product f from the Japanese Patent Application No. 62-82082. .

However, in order to fit the tubular resin product f into close contact with the outer periphery of the oil supply port b, it is necessary to divide the product into two or three parts and connect them freely with hinges h as shown in FIG. is there. However, since the hinge h is integrally formed by connecting both end surfaces to the outer peripheral portion of the divided end surface of the divided piece g as shown in FIG. 10, when the resin product f is closed in a tubular shape as shown in FIG. There is a drawback that the hinge h protrudes to the outer periphery and makes it difficult to insert the body d into the fitting port e. Such a phenomenon occurs not only in an automobile body, but also when a tubular resin product is used as a cushioning material or a functional component other than cushioning between inner and outer members.

(Problems and Objectives to be Solved by the Present Invention) The present invention has a structure in which a tubular resin product is made into several cut pieces, and each cut piece is connected by a hinge so as to be expandably connected. At this time, it is an object and an object to improve to a hinge structure in which the hinge does not protrude to the outer periphery.

(Means for Solving Problems) The present invention has a specificity that meets the above-mentioned purpose.
A peripheral edge that is continuous in the circumferential direction is provided on the inside of the tubular resin product, and several edges are cut in the axial direction to include this edge.
A grooved cutting surface in the height direction that does not penetrate the above-mentioned edge is formed on the circumferential end surface of the inner surface of each cut piece, and both sides of the hinge are connected to the groove walls on both sides of the grooved cutting surface and integrally formed. The present invention relates to a hinge structure for a tubular resin product, characterized in that the hinges are connected so that they can be deployed freely, and the hinge cut portions are brought into close contact with each other without protruding the hinge to the outer surface when closed in a tubular shape. .

A preferred embodiment of the present invention will be described below.

(Embodiment) FIGS. 5 to 7 show a first embodiment of the present invention, and FIG. 8 shows a second embodiment.

The first embodiment comprises a cylindrical resin product 1 as shown in FIGS. 2 and 4, and has edges 3 and 3a which are continuous in the circumferential direction with the same inner diameter at the upper and lower edges of the cylindrical body 2. Are provided so as to project inward in the radial direction, and the tubular main body 2 is axially cut including the edges 3 and 3a thereof into several (two in the first embodiment) cut pieces 4, 4. An inwardly projecting thick-walled portion 5 having a degree of protrusion less than that of the edge portions 3 and 3a is provided at the circumferentially cut end portions of the respective cut pieces 4 and 4, and the second and seventh portions are provided between the edge portions 3 and 3a. As shown in the figure, an axial grooved cutting surface 6 is formed, and hinges 7 are integrally formed with both sides connected to the wall surfaces on both sides of the grooved cutting surface.

Further, at the portion which becomes the outer end when the respective cutting pieces 4 and 4 are developed as shown in FIGS. 1 and 3, one of the respective cutting pieces 4 and 4 is recessed from the outer periphery at a part in the height direction of the tubular main body 2. The engaging groove 9 is formed, and then the first projecting piece 10 projecting circumferentially from the cut portion is provided. On the other side, the engaging groove part 11 for immovably fitting the first projecting piece 10 and the engaging groove 9 are provided. The second protruding piece 12 that fits in is provided. The second protruding piece 12 has a shape protruding in the circumferential direction from the cut end surface of the other split piece 4.

The second embodiment in FIG. 8 shows a resin product 1 in the form of a rectangular cylinder, which has edges 3, 3a (3a not shown) and cut pieces 4, 4.
However, the description is omitted because it is the same as that of the first embodiment.

(Operation) In the present invention, when the split pieces 4 and 4 are expanded as shown in FIGS. 1, 3 and 8, a hinge 7 for connecting both ends to the groove wall of the grooved cutting surface 6 is shown as enlarged in FIG. When the cutting pieces 4 and 4 are closed as shown in FIG. 6, the hinge 7 starts contracting and is closed in a tubular shape as shown in FIGS. 2 and 4.
Further, when the tubular main body 2 is formed into a tubular shape by fitting the engagement groove 9, the first projection piece 10, the engagement groove portion 11, and the second projection piece 12 into each other, the inner surface of the hinge 7 has a tubular shape as shown in FIG. The inner surface of the hinge 7 constitutes a part of the outer periphery of the main body 2, and the inner surface of the hinge 7 becomes a convex arcuate bulge to form a small protrusion 7 on the radially inner side of the main body 2.
Change to a.

(Effect) The tubular resin product of the present invention is provided with an edge portion continuous in the circumferential direction on the inner circumference, and several cutting pieces 4 and 4 axially cut including the edge portion of the tubular body are expanded by a hinge. A grooved cutting surface 6 in the height direction that does not penetrate the edge portions 3 and 3a is formed on the inner surface of the connecting portion so that both sides of the hinge 7 are connected to both groove walls of the grooved cutting surface and integrally formed. When the cut pieces 4 and 4 are deployed, the hinge 7 protrudes inward in the radial direction of the tubular main body in a protruding arc shape to generate a hinge action, and when the tubular main body is closed into a tubular shape, the hinge 7 Does not contract outwardly and contracts into a small projecting arc shape or the like to project a protrusion on the outer surface, and thus when the outer surface of the tubular resin product is tightly fitted in the hole of the outer part, Cylindrical resin whose purpose is different from the above, because the hinge does not become an obstacle for fitting into the hole. Even if the product has a structure in which the split pieces are connected by a hinge, the hinge 7 can be configured to have a smooth outer surface that does not project to the outer periphery, so that it has the effect of facilitating use.

[Brief description of drawings]

1 to 7 show a first embodiment of the present invention, and FIG. 8 shows a second embodiment. FIG. 1 is a longitudinal sectional view showing a state in which the cut pieces 4 and 4 are expanded, and FIG. The figure is a longitudinal sectional view in the state of being closed in the same tubular shape, FIG. 3 is a perspective view of the state of FIG. 1, FIG. 4 is a perspective view of the state of FIG. 2, and FIGS. FIG. 8 is a vertical cross-sectional view of a quadrangular resin product showing the same state as FIG. 1. 9 to 11 show an example of use of a tubular resin product at a stage before the invention, FIG. 9 is a vertical sectional view of the use example, and FIG. 10 is a vertical sectional view showing formation of a conventional hinge. FIG. 11 and FIG. 11 are perspective views showing the outer surface protrusion of the hinge. 1 ... Resin product, 2 ... Cylindrical body, 3, 3a ... Edge 4 ... Split piece, 6 ... Groove-shaped cutting surface, 7 ... Hinge

Claims (1)

[Scope of utility model registration request] 1. A tubular resin product is provided with an edge portion continuous in the circumferential direction on the inner side in the radial direction, and the edge portion is cut in the axial direction to form a plurality of slit pieces. A grooved cutting surface in the height direction that does not penetrate the above-mentioned edge is formed on the circumferential end surface, and both sides of the hinge are connected to the groove walls on both sides of the grooved cutting surface to perform integral molding to form a cut piece. A hinge structure for tubular resin products characterized by being connected in a freely deployable manner.