JP2005021132A - Connection structure of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure for connecting pipes in a telescopically extensible state while preventing the sticking of the pipes and ensuring smooth operation. <P>SOLUTION: A small diameter rod (pipe) 2 has a rod body 2a and a fitting male part 2b formed at a butt end of the rod body 2a and having a diameter larger than that of the rod body 2a. The fitting male part 2b has a tapered form increasing the outer diameter toward the butt end and has a plurality of protrusions formed on the circumference by masking treatment. A large diameter rod 1 has a rod body 1a and a fitting female part 1b formed at the tip side of the rod body 1a and fittable with a fitting male part 2b inserted into the female part. A part of the tip end of the fitting male part 2b is exposed on the tip side relatively to the fitting female part 1b in the case of extracting the small diameter rod 2 toward the tip side of the large diameter rod 1 and fitting the fitting male part 2b into the fitting female part 1b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure for connecting tubular bodies to each other, and more particularly to a connection structure called a swinging type.

  Many of the recent fishing rods are connected to a plurality of rod bodies (tubular bodies) to form a single long fishing rod. One of the methods for connecting the individual enclosures is called “outing form”. This swinging form is such that when the small-diameter housing located on the tip side is sequentially housed inside the large-diameter housing located on the base side, and the small-diameter housing is pulled out to the tip side, This is such that the outer periphery of the heel side end of the case and the inner periphery of the tip end of the large diameter case are fitted (for example, see Patent Document 1).

  One of the requirements for connecting tubular bodies such as casings in such a swinging form is prevention of sticking between the casings. In other words, when fitted at a predetermined fitting portion between a small-diameter housing and a large-diameter housing, the fitted portions are fixed by the intervention of water or dust, and the housings can be easily removed. It will not be possible.

Therefore, in order to prevent such sticking, there is also known one in which a hole is formed in the fitting male part to reduce the contact area between the casings (for example, see Patent Document 2).
Japanese Patent Application Laid-Open No. 11-075634 JP 2002-209478 A

  Another requirement when connecting tubular bodies, such as rods, in a swinging manner is to improve the operability of fitting / releasing operations between the tubular bodies. That is, in general, after a user pulls out a small-diameter tubular body to the tip side of the large-diameter tubular body in a swing-out manner to connect the tubular bodies to each other, the user cancels the fitting between the tubular bodies, and conversely The body is stored in a large-diameter tubular body. There is a demand for smooth operation.

  Of course, the above-mentioned sticking prevention is one element that ensures smooth operation. However, the smoothness of operation cannot be ensured only by preventing sticking. In other words, in addition to preventing sticking, consideration for operability is further required.

  The subject of this invention is providing the structure which can perform the operation smoothly, while preventing fixation of tubular bodies, when connecting tubular bodies in a swing-out form.

  The connection structure of the present invention is a connection structure of tubular bodies when a small-diameter tubular body is connected in a swing-out manner so that it can be inserted into and removed from the distal end side of the large-diameter tubular body. The small-diameter tubular body has a main body portion and a fitting male portion having a diameter larger than that of the main body portion which is continuous on the proximal side of the main body portion. The fitting male part is tapered such that the outer diameter of the fitting male part increases toward the hand side, and a plurality of protrusions are formed on the peripheral surface by masking. On the other hand, the large-diameter tubular body has a main body portion and a fitting female portion to which a continuous fitting male portion can be fitted on the distal end side of the main body portion. When the small-diameter tubular body is pulled out to the distal end side of the large-diameter tubular body and the mating male part is fitted to the mating female part, a part of the distal end side of the mating male part is distal to the mating female part. Is exposed.

  Here, the small-diameter tubular body and the large-diameter tubular body are drawn by drawing the small-diameter tubular body to the distal end side of the large-diameter tubular body and fitting the fitting female portion of the large-diameter tubular body into the fitting male portion of the small-diameter tubular body. Are positioned and connected to each other. A plurality of protrusions are masked on the peripheral surface of the fitting male part, and these protrusions prevent unnecessary fixation between the fitting male part and the fitting female part. Further, when the small-diameter tubular body is pulled out to the distal end side of the large-diameter tubular body and the fitting male part is fitted to the fitting female part, the fitting male part has a part of the leading end side of the fitting female part leading the leading end. It is exposed to the side (that is, the tip side of the large-diameter tubular body). A plurality of protrusions are also masked on the exposed peripheral surface of the fitting male part. And a user grasps a part of this exposed fitting male part, and performs operation etc. which store a small diameter tubular body in a large diameter tubular body. A part of the fitting male part is used as a “grasping margin” at the time of operation, and a protrusion is also formed on this part to improve operability. The masking process can be performed on the entire fitting male portion at once, and the molding process is also easy.

  ADVANTAGE OF THE INVENTION According to this invention, when connecting tubular bodies by a swing-out form, adhesion of tubular bodies can be prevented and the operation can be performed smoothly.

[First Embodiment]
Hereinafter, as one embodiment of the present invention, a swing type fishing rod will be described with reference to the drawings.

  The swing-type fishing rod is a single fishing rod by connecting a plurality of rods in sequence. Two adjacent housings among the plurality of housings are shown in FIG. The two housings are a large-diameter housing 1 and a small-diameter housing 2 located on the base side. The small-diameter casing 2 is connected to the tip of the large-diameter casing 1 so that it can be inserted and removed freely, that is, in a so-called swing-out manner. For example, the large-diameter frame 1 is the main rod located on the most proximal side, and the small-diameter frame 2 is an upper rod connected to the tip side. Members such as a reel sheet, a fishing line guide, a grip, and a slide guide are attached to the peripheral surfaces of the large-diameter housing 1 and the small-diameter housing 2 as necessary.

  The large-diameter housing 1 and the small-diameter housing 2 are each a tapered member having a tapered taper made of a prepreg material obtained by impregnating carbon fiber or glass fiber with a synthetic resin. Specifically, it is formed by winding a prepreg material around a peripheral surface of a core material having a predetermined taper and firing it.

  The large-diameter housing 1 can be divided into two parts: a main body part 1a and a fitting female part 1b formed on the inner peripheral surface of the tip end part of the main body part 1a. As described above, since the large-diameter housing 1 is a cylindrical body with a tapered taper, the fitting female portion 1b does not have to be reduced by one step with respect to the main body portion 1a. Thus, the fitting female portion 1b may be formed by partially reducing the inner diameter. In addition, in the large-diameter frame 1, 1) a certain range from the end on the tip side is a gently tapered portion, 2) its heel side is a sharply tapered portion, and 3) its heel side is gradual. The taper portion may be divided into three stages. And 1) The taper taper part from the tip side end part can also be used as the fitting female part 1b.

  The axial length that forms the fitting female portion 1 b varies depending on the size of the large-diameter housing 1. For example, if the diameter of the tip side end of the large-diameter housing 1 is about 20 to 30 mm, the axial length of the fitting female portion 1b is preferably about 60 to 100 mm. With such an axial length, a sufficient fitting force can be ensured.

  One small-diameter housing 2 can be divided into two parts, a main body 2a and a fitting male part 2b formed at the base end of the main body 2a. The small-diameter housing 2 is also a cylindrical body with a tapered taper, like the large-diameter housing 1. In particular, a part of the heel side end is made thicker and larger in diameter than the other parts, and this thickened and enlarged part is the fitting male part 2b.

  For example, as one of the forming methods of the fitting male part 2b, a prepreg material for forming the main body part 2a is wound around the peripheral surface of the core material, and is further separately provided on the peripheral surface of the base side of the prepreg material. There is a method of laminating auxiliary prepregs and firing both.

  The fitting male part 2b has a sharper taper than the main body part 2a. For example, if the main body 2a has a taper of about 1/1000 to 2/1000, the taper of the fitting male part 2b is about 2/1000 to 4/1000. The outer diameter of the fitting male part 2a is set so as to approximately match the fitting female part 1b described above on the base side. That is, the base side of the fitting male part 2b can be fitted to the fitting female part 1b.

  Moreover, the axial direction length of this fitting male part 2b changes with axial direction lengths of the fitting female part 1b. For example, as described above, if the axial length of the fitting female portion 1b is about 60 to 100 mm, the axial length of the fitting male portion 2b is about 200 to 300 mm.

  Furthermore, a plurality of protrusions are formed on the peripheral surface of the fitting male part 2b by a masking process. The shape of the protrusion is, for example, a circle or an ellipse as shown in FIG. But the shape is not limited and is arbitrary. As will be described later, the masking process is a process of winding a cover sheet in which predetermined holes are formed, applying a coating material from the top of the cover sheet, and forming protrusions with the coating material remaining in the holes. The plurality of protrusions formed by the masking process may be formed randomly on the peripheral surface of the fitting male part 2b. The height of the protrusion is set to about 25 to 300 microns. If the height is set to about 300 microns, it can be expected to prevent sticking of the fishing line to the periphery of the rod body.

  The protrusion on the peripheral surface of the fitting male part 2b is formed by a technique as shown in FIG. 2 (masking process). First, as shown to Fig.2 (a), the cover sheet S in which the predetermined several hole is formed is wound around the surrounding surface of the fitting male part 2b. And a coating material is sprayed from the surrounding surface of the cover sheet S, as shown in FIG.2 (b). An example of such a coating material is urethane-based paint. The coating material is applied to the peripheral surface of the fitting male portion 2b at the portion where the hole is formed. Thereafter, when the cover sheet S is peeled off, the coating material remains only in the hole portions, and a plurality of protrusions can be formed by drying and solidifying the coating material.

  In addition, although the specific two rods in the rods constituting the fishing rod are described as the large-diameter rod 1 and the large-diameter rod 2 here, in other rods constituting the fishing rod, A similar structure can be employed.

  In such a fishing rod, in use, the small-diameter housing 2 is pulled out to the distal end side of the large-diameter housing 1, and the fitting female portion 1b of the large-diameter housing 1 is fitted to the fitting male portion 2b of the small-diameter housing 2. (See FIG. 1). The same applies to other rod bodies constituting the fishing rod. Thus, the rods are sequentially positioned and then connected and fixed to form a long fishing rod. A plurality of protrusions are masked on the peripheral surface of the fitting male part 2b, and these protrusions prevent unnecessary fixation between the fitting male part 2b and the fitting female part 1b.

  When the fishing rods that make up the fishing rod are stored in a compact state after fishing, the fittings between the rods are released and the rods located on the tip side are sequentially stored in the housing on the hand side. To do. That is, the small diameter casing 2 is accommodated in the large diameter casing 1.

  Here, even when the small-diameter housing 2 is pulled out to the tip side of the large-diameter housing 1 and the fitting male portion 2b is fitted to the fitting female portion 1b, the fitting male portion 2b remains on the tip side. A part is exposed to the tip side from the fitting female part 1b (that is, to the tip side of the large-diameter housing 1) (the degree of exposure is preferably about 150 to 200 mm). A plurality of protrusions are also masked on the peripheral surface of the exposed fitting male part 2b. Accordingly, the user grasps a part of the fitting male portion 2b on which the exposed protrusion is formed, and stores the small-diameter housing 2 in the large-diameter housing 1 while suppressing undue slipping and the like. It can be performed. In this way, a part of the fitting male part 2b is used as a “grasping margin” at the time of operation, and a protrusion is formed on this part, thereby improving operability.

[Second Embodiment]
A modification is shown in FIG. 3 as the second embodiment. Similarly to the first embodiment, the small-diameter housing 12 can also be divided into two parts: a main body 12a and a fitting male part 12b formed at the heel side end of the main body 12a.

  A plurality of protrusions are formed on the peripheral surface of the fitting male portion 12b by a masking process. As shown in FIG. 3, each protrusion has a thin rod shape that extends in a direction oblique to the peripheral surface of the small-diameter housing 12 in the axial direction. A plurality of the protrusions are formed in parallel at intervals in the axial direction. Moreover, the protrusion is formed so that it may become a left-right symmetric pair in the periphery of the small diameter housing 12. FIG. The masking process here is the same as that in the first embodiment. When a plurality of protrusions are formed in such a slanting direction, when the angler grips the portion and “holds it”, the protrusion matches the gripping direction of the angler's finger, and the operability is further improved.

  In addition, as shown in FIG. 4, a protrusion is formed so as to be obliquely inclined in both positive and negative directions with respect to the axial direction so that the angler can hold the part with either left or right hand. You may form in cross shape.

[Other Embodiments]
In the said embodiment, this invention is demonstrated in the rod which comprises a fishing rod. However, the present invention can be applied not only to a fishing rod but also to a net pattern or the like. The handle of the ball net is also configured by connecting a plurality of tubular bodies in a swing-out form. Also, the handle of the ball net is drawn out of a tubular body into a single long handle, or each tubular body is housed in a compact state. Therefore, operability can be improved while preventing sticking by applying the same structure to the tubular body constituting the handle of the ball net.

The figure which showed the large diameter housing 1 and the small diameter housing 2 which employ | adopted 1st Embodiment of this invention. The figure which showed the process of the masking process of the fitting male part 2b of the small diameter housing 2. FIG. The figure which showed the large diameter housing 11 and the small diameter housing 12 which employ | adopted 2nd Embodiment of this invention. The figure which showed the modification of FIG.

Explanation of symbols

1 Large Diameter Housing 2 Small Diameter Housing 1b Fitting Female Part 2b Fitting Male Part

Claims (1)

A tubular body connection structure when connecting a small diameter tubular body to and from a distal end side of a large diameter tubular body in a swingable manner,
The small-diameter tubular body has a main body part and a fitting male part having a larger diameter than the main body part continuous to the proximal side of the main body part, and the outer diameter of the fitting male part increases toward the proximal side. A plurality of protrusions are formed by masking on the peripheral surface of the taper.
The large-diameter tubular body has a main body portion and a fitting female portion to which the fitting male portion continuous on the distal end side of the main body portion can be fitted,
When the small-diameter tubular body is pulled out to the distal end side of the large-diameter tubular body and the fitting male part is fitted to the fitting female part, a part of the fitting male part on the tip side is the fitting female. The connection structure of the tubular body exposed to the front end side from the part.

Images