JP2008017793A - Telescopic extension rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic extension rod having stabilized housing state of a core and prolonged life of the inner fitting part of a butt section rod by devising the form of the outer circumference of the butt-side end of the core. <P>SOLUTION: A housing and holding mechanism B to keep the housed state of a core 2 in a butt section rod is composed of an outer fitting part 2A of the core 2 and an inner fitting part fitting to the outer fitting part 2A and formed on the butt section rod 1. The outer fitting part 2A has a tapered part 2b having a large diameter at the tip section side and reducing the diameter toward the butt section, and the small diameter of the tapered part 2b at the butt section side is made to be smaller than the opening diameter (d) of the tip section end of the inner fitting part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an extendable scissor provided with an extended state in which a small-diameter housing is pulled out from a large-diameter housing and a storage holding mechanism for holding the storage state in which the small-diameter housing is stored in the large-diameter housing.

  To construct the storage and holding mechanism, a rear large-diameter bulging portion as an outer fitting portion is formed on the outer peripheral surface of the upper end portion on the base as the small-diameter casing, and the original as the large-diameter casing is formed. A retainer as a retaining ring is provided on the inner peripheral surface of the heel side end of the heel (see Patent Document 1).

Santo 2522551 (lines 4 to 28 of the fourth column of the gazette and FIGS. 1 and 2)

The above-mentioned rear large-diameter bulge portion is formed so as to gradually increase in diameter toward the base end side or to have a substantially constant diameter. On the other hand, the retainer is made of an elastic body such as rubber, but the fitting surface into which the rear large-diameter bulged portion is fitted maintains a constant diameter in the axial direction. It was formed on the inward peripheral surface.
Although it is required that the rear large-diameter bulge and the axis of the retainer are substantially coincident with each other, the rear large-diameter bulge is fitted to the retainer. When starting, the axes are rarely coincident. As a result, the rear large-diameter bulging portion is not inserted into the fitting hole of the retainer and comes into contact with the peripheral edge of the fitting hole. It may be inserted into the fitting hole. As a result, the retainer may be damaged and the life may be shortened.

  The purpose of the present invention is to stabilize the storage and holding state of the small-diameter housing and to increase the service life of the inner fitting portion provided in the large-diameter housing by devising the outer peripheral surface of the base end of the small-diameter housing. The point is to provide a telescopic scissors that can be made into a simple structure.

〔Constitution〕
The characteristic configuration of the invention according to claim 1 is characterized in that the storage holding mechanism that holds the storage state includes an outer fitting portion provided in the small-diameter housing and the large-diameter housing that is fitted into the outer fitting portion. The inner fitting portion provided on the outer fitting portion, and the outer fitting portion is formed with a reduced diameter portion having a large diameter at the tip side and decreasing toward the base side, and the base side of the reduced diameter portion. The outer diameter of the end is smaller than the opening diameter of the tip side end of the inner fitting part, and the outer diameter of the tip side end of the reduced diameter part is the opening diameter of the tip side end of the inner fitting part The effect is as follows.

[Action]
As the outer fitting portion provided in the small-diameter housing, the outer fitting portion of the small-diameter housing is formed on the base-side end by reducing the diameter of the small-diameter housing toward the base. When the inner fitting portion is fitted, first, the small diameter portion at the base side end of the reduced diameter portion enters the inner fitting portion.
In addition, since the outer diameter of the heel side end of the reduced diameter portion is set smaller than the opening diameter of the heel side end of the inner fitting portion, the axis of the reduced diameter portion and the axis of the inner fitting portion are Even if there is a slight misalignment, it can be absorbed by the difference in diameter between the outer diameter of the base end of the reduced diameter portion and the opening diameter of the tip end of the inner fitting portion, and the base side of the reduced diameter portion It can suppress that an end contacts the tip side end of the inner fitting part.
When the base end of the reduced diameter portion enters the tip end of the inner fitting portion, the portion of the reduced diameter portion that gradually increases in diameter enters the inner fitting portion, and the inner fitting of the large diameter casing is performed. The fitting state is completed by fitting the large-diameter portion larger than the opening diameter of the joint portion into the inner fitting portion of the large-diameter housing.

〔effect〕
Therefore, it is possible to prevent the inner fitting portion of the large-diameter housing from being damaged and to achieve a long life, and as a configuration for that purpose, a configuration in which a reduced diameter portion is provided in the outer fitting portion of the small-diameter housing is adopted. It was possible to achieve it.

  A feature of the invention according to claim 2 is that, in the invention according to claim 1, the fitting surface of the inner fitting portion provided in the large-diameter housing has a constant diameter over the axial direction of the large-diameter housing. It is in the point formed in the straight surface to maintain, The effect is as follows.

[Function and effect]
That is, since the fitting surface of the inner fitting portion provided in the large-diameter housing is formed as a straight surface, any of the outer fitting portions of the small-diameter housing whose constant diameter is formed in a loose truncated cone shape. The diameter is adapted to the outer diameter of the part. Therefore, the outer fitting portion of the small-diameter casing is made to have a certain length with respect to the outer fitting portion without strictly managing the diameter of the outer fitting portion of the small-diameter casing or the inner fitting portion of the large-diameter casing. A substantially constant fitting state can be obtained in a state of being inserted into the inner fitting portion of the body.

  According to a third aspect of the present invention, there is provided a structure made of an elastic material, wherein the inner fitting portion provided in the large-diameter casing is attached to the large-diameter casing in the first or second aspect The effect is as follows.

[Function and effect]
By providing a retaining ring configured separately from the large-diameter housing as the inner fitting part of the large-diameter housing, the material, shape, etc. sufficient to hold the small-diameter housing can be freely selected and set. The holding function of the housing can be enhanced. Also, the maintenance work is easy because it is provided separately from the large-diameter housing.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the heel side from the heel side to the heel side from the reduced diameter portion of the outer fitting portion is provided. The enlarged diameter portion is formed to increase in diameter toward the side, and the enlarged diameter portion is fitted to the inner peripheral surface of the tip side end portion of the large diameter casing, thereby reducing the large diameter casing. It is in the point which comprises the expansion | extension holding | maintenance mechanism hold | maintained in the expansion | extension state pulled out from the diameter rod, The effect is as follows.

[Function and effect]
By fitting the enlarged portion of the outer fitting portion to the inner peripheral surface of the tip side end portion of the large-diameter housing, the small-diameter housing is held in an extended state pulled out from the large-diameter housing. Therefore, a function that cannot be exhibited in the reduced diameter portion can be provided in the enlarged diameter portion, and the expansion and contraction function as a fishing rod can be exhibited in the reduced diameter portion and the enlarged diameter portion.

  The telescopic ridges represented by ridges and mountain stream ridges will be explained. As shown in FIGS. 1 and 2, the telescopic swing rod A includes an extended state in which the base 2 as a small-diameter rod is pulled out from the base 1 as a large-diameter rod, and the base 2 as the base rod. A storage holding mechanism B that holds the storage state stored in 1 is provided.

  The storage and holding mechanism B mainly includes an outer fitting portion 2A provided on the upper portion 2 and an inner fitting portion provided on the main rod 1 that is fitted to the outer fitting portion 2A. Here, the inner fitting portion will be described. As shown in FIGS. 1 and 3, a retaining ring 3 made of an elastic material is provided as an inner fitting portion. That is, the elastic retaining ring 3 is formed with a cylindrical outer peripheral surface 3A and a flange 3a at the rear end of the outer peripheral surface 3A, and six elastic protrusions 3B along the axial direction on the inner peripheral surface side. And the inward surface 3b of the elastic protrusion 3B is configured as a fitting surface of the inner fitting portion. The inward surface 3b of the elastic protrusion 3B is formed on a straight surface that maintains a constant diameter over the axial direction of the main shaft 1.

As shown in FIGS. 1 and 2, a taper guide surface 3C having a diameter that decreases as it enters the base side is provided at the tip end of the retaining ring 3, and the taper guide surface 3C is the tip of the elastic protrusion 3B. It is provided in a state of being continuous with the side end, and is configured to guide an outer fitting portion provided on the original 2 described later.
The retaining ring 3 is formed to be elastically deformable using a synthetic resin, a synthetic rubber, or the like.

As shown in FIGS. 1 and 2, a female screw 3D is formed on the inner peripheral surface of the base side end portion of the retaining ring 3, and is configured to be screwed into the bottom plug 4. The female screw 3D The elastic protrusion 3B is provided up to a position reaching the base end. On the other hand, a mounting seat surface is formed at the base side end of the elastic protrusion 3B, and a seat rubber 5 for receiving the center part 2 or the like in the stored state can be attached.
The retaining ring 3 configured as described above is attached and fixed by closely fitting the cylindrical outer peripheral surface 3A to the inner peripheral surface of the base side end portion of the main shaft 1.

The configuration of the original 2 will be described. Although not shown in the drawing, a prepreg sheet formed by impregnating a thermosetting resin such as epoxy is wound around a mandrel to a lineup of reinforcing fibers such as carbon fibers, and after baking, polishing processing is performed,竿 Construct material.
And as shown in FIG.1 and FIG.2, 2A of outer side fitting parts formed in the shape which bulges large diameter are provided in the collar side edge part of the upper part 2. As shown in FIG.

  To constitute the outer fitting portion 2A, a reinforcing pattern made of prepreg is similarly wound around the base side end portion of the raw material before firing as described above, and the reinforcing pattern is wound as described above. After firing, polishing processing or the like is performed to form the outer fitting portion 2A having a large-diameter bulge shape.

The outer fitting portion 2A further includes a truncated cone-shaped enlarged diameter portion 2a that gradually increases in diameter from the tip side toward the heel side, and a maximum diameter portion P that is located on the heel side of the enlarged diameter portion 2a. It has a truncated cone-shaped reduced diameter portion 2b that is reduced in diameter toward the base side. That is, the reduced diameter portion 2b is formed in a state where the maximum diameter portion P is the tip end and the diameter is reduced toward the base end Q.
The inclination of the outer peripheral fitting surface of the reduced diameter portion 2b is set to a value of 0 mm to 2.5 mm / 1000 mm.

  Here, the fitting diameter between the reduced diameter portion 2b of the outer fitting portion 2A of the upper 2 and the elastic protrusion 3A of the holding ring 3 attached to the main rod 1 will be described. As shown in FIGS. 1-3, the outer diameter of each part of the reduced diameter part 2b is set as follows. The outer diameter of the maximum diameter portion (tip end) P is set to D1, and the outer diameter of the heel end Q is set to D2.

  On the other hand, the inner diameter of the elastic projection 3A of the holding ring 3 is set as follows. That is, as shown in FIGS. 1 and 3, the virtual inner diameter connecting the inward ends of the six elastic protrusions 3B is set as d, and this virtual inner diameter d is set to the outer diameter D1 of the maximum diameter portion P and the base side. The diameter is set between the outer diameter D2 of the end Q. Accordingly, the outer diameter D1 of the maximum diameter portion P of the reduced diameter portion 2b is larger than the virtual inner diameter d of the elastic projection group, and the outer diameter D2 of the flange side end Q is smaller than the virtual inner diameter d. This virtual inner diameter d is referred to as the opening diameter of the tip side end of the inner fitting portion.

As shown in FIGS. 1 (a) and 2 (a), the reduced diameter portion 2b can enter the elastic protrusion 3A with little resistance from the base end Q to a portion of a certain length in the axial direction. However, when the portion from the portion having a certain length in the axial direction to the maximum diameter portion P located on the heel side is fitted into the elastic projection 3A of the holding ring 3, the elastic projection 3A is pushed and expanded. Will be.
On the other hand, as shown in FIG. 2 (a), a bulging portion 2B is also formed on the outer peripheral surface of the heel side end portion of the original 2 and this bulging portion 2B is the heel side end of the base rod 1. It is comprised so that it may contact | abut to the internal peripheral surface of a part.
Here, the storage and holding mechanism B includes a bulging portion 2B formed at the heel-side end portion of the original 2 and an outer fitting portion 2A formed at the heel-side end portion, and the rivet 1 that is in pressure contact with them. It is comprised with the inner peripheral surface of a heel side edge part, and the holding ring 3 provided in the heel side edge part.

  With the above-described configuration, when the base 2 is housed in the base 1, it enters the elastic protrusion 3A from the base end Q of the reduced diameter portion 2b, but the base end Q of the reduced diameter portion 2b. Even if the misalignment between the elastic projections 3A and the elastic protrusion 3A group occurs, the base end Q is guided to the taper guide surface 3C so as to eliminate the misalignment. Further, the diameter-reduced portion 2b is formed in a state where the diameter gradually decreases toward the collar side, and the collar-side end Q functions in the misalignment eliminating direction.

As shown in FIG. 2 (b), when the upper part 2 is pulled out from the contracted state within the main shaft 1, the diameter-expanded portion 2a formed on the tip side of the reduced-diameter portion 2b is finally obtained. Is fitted into the inner peripheral surface of the tip side end portion of the heel 1 so that the upper 2 is fixed in an extended state.
Here, the expanded holding mechanism C that holds the expanded state of the original 2 is configured by the enlarged diameter portion 2 a of the original 2 and the inner peripheral surface of the tip side end of the original rod 1.

[Another embodiment]
(1) As the retaining ring 3, the number of the elastic protrusions 3A may be three or more equally in the circumferential direction.
(2) The retaining ring 3 may not have the elastic protrusion 3A. That is, as shown in FIG. 4, the holding ring 3 has a cylindrical shape, and the fitting surface 3 </ b> E that fits the outer fitting portion 2 </ b> A of the original 2 is disposed on the intermediate portion in the axial direction of the holding ring 3. It is formed in a middle swelling state that bulges in the direction. Alternatively, as shown in FIG. 5, the fitting surface 3 </ b> F may be formed so as to be gradually reduced in diameter from the heel side opening end toward the heel side opening end.
(3) Although the retaining ring 3 configured separately from the main rod 1 is introduced as the inner fitting portion provided on the main rod 1, the inner ring is bulged inward on the inner peripheral surface of the main rod 1 Alternatively, a prepreg bulging portion may be formed.

(B) A longitudinal side view showing the state before the outer fitting part provided on the base constituting the telescopic hook is fitted to the inner fitting part provided on the main hook, (b) provided on the original Vertical side view showing a state in which the outer fitting portion is fitted to the inner fitting portion provided on the main shaft. (A) A vertical side view showing a contracted state in which the outer fitting portion provided on the former is fitted to the inner fitting portion provided on the former, and (b) provided on the outer fitting portion on the former. A longitudinal side view showing a state in which the enlarged diameter portion is brought into pressure contact with the inner peripheral surface of the heel side end portion of the base and the base is set in the extended state. Front view showing the retaining ring attached as the inner fitting part of the main shaft Longitudinal side view showing another embodiment of the retaining ring Longitudinal side view showing another embodiment of the retaining ring

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Large diameter housing 2 Small diameter housing 2A Outer fitting part 2a Expanded diameter part 2b Reduced diameter part B Storage holding mechanism C Elongation holding mechanism

Claims (4)

A telescopic ridge having an extended state in which a small-diameter housing is pulled out from a large-diameter housing and a storage holding mechanism for holding a storage state in which the small-diameter housing is stored in the large-diameter housing,
The storage holding mechanism that holds the storage state is configured by an outer fitting portion provided in the small-diameter housing and an inner fitting portion provided in the large-diameter housing that are fitted to the outer fitting portion. In addition, the outer fitting portion is formed with a reduced diameter portion whose tip side has a large diameter and decreases toward the heel side, and the outer diameter of the heel side end of the reduced diameter portion is set to the inner fitting portion. A telescopic scissor that is smaller than the opening diameter of the heel side end and has an outer diameter of the heel side end of the reduced diameter portion larger than the opening diameter of the heel side end of the inner fitting portion.   The telescopic scissors according to claim 1, wherein a fitting surface of an inner fitting portion provided on the large-diameter housing is formed on a straight surface that maintains a constant diameter in the axial direction of the large-diameter housing.   The telescopic scissors according to claim 1 or 2, wherein the inner fitting portion provided on the large-diameter housing is a retaining ring made of an elastic material attached to the large-diameter housing.   A diameter-enlarged portion that increases in diameter from the heel side toward the heel side is formed on the heel side of the reduced diameter portion in the outer fitting portion, and the enlarged diameter portion is formed on the heel of the large-diameter housing. The extension holding mechanism that holds the small-diameter casing in an extended state pulled out from the large-diameter casing by being fitted to the inner peripheral surface of the front-side end portion. Telescopic scissors as described in 1.

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