JPH072692U - Inner core for cold shrink tube - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the mechanical strength of the inner core for a room temperature shrinkable tube having SZ-shaped cuts against the external pressing force of the folded portion of the SZ-shaped cuts. [Structure] The above-mentioned folded-back portions, which are conventionally arranged in a line in the axial direction, are dispersed by 120 degrees in the circumferential direction, and the folded-back portions at the same relative position are arranged every two in the axial direction. To be located.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an inner core mounted inside the expanded tube in order to hold the expanded elastic tube as it is.

[0002]

[Prior art]

 Conventionally, as the inner core of this type, the one having the structure disclosed in Japanese Utility Model Laid-Open No. 28287/1993 was used. However, in the inner core of this structure (referred to as a spacer in Jitsukaihei 3-28287), as shown in FIG. 5, the folded portion (2) of the SZ-shaped cut is relatively located at the same position. Since they are arranged in a line in the axial direction, the strength of this part against the pressing force from the outside is extremely weak.For example, if this part is attached to an elastic tube with a large thickness and a strong contracting force, the pressing force Therefore, if the mechanical strength of the inner core material is slightly reduced due to the drawback of being crushed and exposed to high temperatures in the summer, the effect is strongly exerted at the folded portion (2) of the SZ-shaped cut and the folded portion. Since (2), there is a drawback that the inner core is crushed. Furthermore, since the pull-out part was in the shape of a string (10), in order to make it easier to pull out, the end of the string (10) of the pull-out part was rounded to form a ring, which was tied with a resin string or the like. There was also a drawback that the work was troublesome.

[0003]

[Problems to be solved by the device]

 This invention was made in order to eliminate the drawbacks described in the prior art, and the room-temperature shrinkage tutu that improves the arrangement of the folded portion of the SZ-shaped cut and reduces the reduction in mechanical strength against pressing force, etc. -The purpose is to provide an inner core for a bus.

[0004] Since the positions of the folded portions of the SZ-shaped cut are dispersed in the circumferential direction by 120 degrees, and the ring-shaped handle is formed integrally with the inner core body. is there.

[0005]

[Function] Since the folded portions that are relatively in the same position appear every other two with respect to the axial method and are not adjacently arranged, the mechanical strength against the pressing force and the like is inevitably improved.

Since the ring-shaped handle is integrally formed, it is possible to omit the conventional work of forming a ring by rolling the ends of the cord of the drawer portion and binding the cord with a resin cord or the like.

[0007]

【Example】

 Referring to the drawings showing an example of the embodiment of the present invention, the positions of the folded portions (2) of the SZ-shaped cuts (1) are dispersed by 120 degrees in the circumferential direction, and the ring-shaped handles (3) are further arranged. -Molded integrally with the core body (4). The material of the inner core body (4) is preferably hard plastic such as hard polyethylene or vinyl that can be molded by an inject cushion machine. The cuts are connected (5) at appropriate intervals.

Dispersing the position of the folded-back portion (2) of the SZ-shaped cut (1) by 120 degrees in the circumferential direction minimizes the reduction of mechanical strength against the pressing force of the folded-back portion (2). This is based on the conclusions drawn from the experimental results of various dispersion angles.

Before use, the ring-shaped handle (3) is preferably sized so that it can be stored in the hollow portion of the inner core body (4).

[0010]

【effect】

 Since the present invention is configured as described above, the mechanical strength against the pressing force from the outside is improved several times or more compared with the conventional one, and the thicker one with the strong contraction force which was impossible in the past. It can be applied to elastic tubes, and since the ring-shaped handle is integrally molded, it has the effect that the conventional troublesome ring making work can be omitted. High utility value.

[Brief description of drawings]

FIG. 1 is a front view showing an example of implementation of the present invention.

FIG. 2 is a development view of FIG.

FIG. 3 is a right side view showing an example of implementation of the present invention.

FIG. 4 is a perspective view showing a conventional usage example.

[Explanation of symbols]

 1 SZ-shaped notch 2 Folded part 3 Ring-shaped handle 4 Inner core body 5 Connection 10 String of drawer part

Claims (1)

[Scope of utility model registration request] 1. A folded-back portion (2) of an SZ-shaped cut (1).
The inner core for a room temperature shrinkable tube is characterized in that the positions are dispersed by 120 degrees in the circumferential direction and the ring-shaped handle (3) is formed integrally with the inner core body (4).