JPH08317811A - Umbrella rib - Google Patents

Abstract

PURPOSE: To provide an umbrella rib which can be injectingly formed out of a synthetic resin and has excellent mechanism strength with satisfactory endurance. CONSTITUTION: This rib comprises a rib body 8, formed of a flexible synthetic resin and a reinforcement core 9 laid along the rib body 8. The reinforcement core 9 is held position by inserting it at, at least its both ends into a fitting hole 12. The reinforcement core 9 extending in axial direction is laid in its midway portion along the rib body 8 in an unfixed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone used as a main bone, a bone or a support bone in a western umbrella such as a long umbrella or a folded umbrella.

[0002]

2. Description of the Related Art Conventionally, it is well known that a canopy bone is made of channel steel, but it is advantageous to form it by injection molding of synthetic resin from the viewpoint of weight reduction and mass production adaptability. Has provided various synthetic resin-made umbrella ribs.

Such a synthetic resin-made canopy bone, for example, in the case of a rib of a folded umbrella, has a pivotal attachment portion provided with a shaft support hole at one end for pivotally attaching to the upper lock, and a child bone at the other end. This is extremely advantageous in that the dowel portion that can be pivoted in a reversible manner and the bifurcated bracket that pivotally connects the skeleton in the axially intermediate portion can be integrally molded simultaneously with the bone portion by injection molding of synthetic resin.

[0004]

However, in spite of the advantage of the integral molding as described above, the synthetic resin-made parachute bone has, as its destiny, a difficulty in mechanical strength, such as glass fiber and carbon fiber. Although it can be strengthened to some extent by using the fiber-reinforced resin, there is a limit.

Therefore, in order to improve the mechanical strength, it is easily inferred that, for example, at the time of injection-molding a canopy bone, a reinforcing core is inserted into a mold and so-called insert molding is performed.

However, when such insert molding is attempted to be performed on a thin umbilical bone, it is difficult to position the reinforcing core in the mold, and it is difficult to completely fill the cavity with the molten resin around the reinforcing core. However, there are many problems in molding, and there is a problem in that the advantages of synthetic resin-made umbrella-bones are lost.

Even if the above molding problem is solved and insert molding becomes possible, in that case, since the reinforcing core is embedded in the synthetic resin-made umbrella umbrella bone, When used as, there is a possibility that internal peeling may occur. That is, the parachute bone must be deformable and reversible in a curved shape by the tension of the umbrella cloth, but in the case of a parachute bone in which a reinforcing core is insert-molded, when curved in an arc shape, the curvature radius of the reinforcing core is Since the radius of curvature of the resin portion on the inner peripheral side and the resin portion on the outer peripheral side covering the reinforcing core is different, a peeling phenomenon occurs between the reinforcing core and the coating resin. as a result,
There is a concern that the coating resin in which the reinforcing core is embedded may easily suffer damage such as cracks.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the above problems and, while following the advantages of synthetic resin-made umbrella ribs integrally molded by injection molding, enables the improvement of strength and durability. It provides bones.

Therefore, the present invention is configured as the first means in that it comprises a bone main body formed in advance from a flexible synthetic resin and a reinforcing core provided along the bone main body. is there.

The present invention is configured as a second means, which comprises a bone main body preliminarily molded from a flexible synthetic resin and a reinforcing core provided along the bone main body.
At least both ends of the reinforcing core are inserted and held in the fitting holes of the bone main body, and an intermediate portion extending in the axial direction of the reinforcing core is provided along the bone main body in a non-fixed state.

Further, the third aspect of the present invention is that the bone main body is made of a flexible synthetic resin in advance, and the reinforcing core extends along the bone main body. , Forming fitting holes in the block portions provided at both ends so as to face each other and communicating with the fitting holes by forming a skeleton extending between the pair of block portions in a groove shape in cross section The reinforcing core is formed by forming a holding groove, and the reinforcing core is held along the holding groove, and both ends of the reinforcing core are inserted and held in the fitting holes.

Further, the fourth aspect of the present invention is to construct a rib having a bone main body preliminarily molded of a flexible synthetic resin and a reinforcing core extending along the bone main body. The bone main body is formed with fitting holes that open toward the block portions provided at both ends so as to face each other, and the bone portions extending between the pair of block portions are formed in a groove shape in cross section so that the fitting is performed. Form a holding groove that communicates with the hole, and
In addition to forming a bifurcated bracket for skeleton pivot connection extending from both sides of the holding groove in the axial middle part of the bone main body,
On the inner surface of the bracket, a locking portion for narrowing the groove opening of the holding groove is provided so as to project. The reinforcing core is held along the holding groove, and both ends of the reinforcing core are held. Is inserted into and retained in the fitting hole, and further, the axially intermediate portion of the reinforcing core is locked from the holding groove to the locking portion.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a folding western umbrella as an example of the western umbrella using the western umbrella bone of the present invention, in which the base end of the rib 3 is pivotally attached to the upper roller 2 fixed to the upper end of the center rod 1. Then, the base end of the skeleton 5 is pivotally attached to the lower wheel 4 which is vertically inserted onto the center rod 1 below the upper wheel 2. FIG. 1 shows an opened umbrella state, and the lower wheel 4 is locked by the opened umbrella locking pallet 6. The main bone 3 is pivotally connected at its tip with a child bone 3a so as to be able to be inverted, and the tip of the bone 5 is pivotally connected to the midway portion of the main bone 3 in the axial direction.

In the embodiment shown in the drawings, the present invention is applied to the rib 3, and the embodiment of the parachute bone 7 of the present invention will be described below by exemplifying the rib 3, but the present invention is not limited to the rib 3. ,
It goes without saying that it can be applied to the skeleton 3a and the ribs 5 and can be applied to various bones of a long umbrella, not limited to the folded western umbrella.

As shown in FIG. 2 (A), the canopy bone 7 has a bone body 8 injection-molded in advance from a flexible synthetic resin,
The reinforcing core 9 and the reinforcing core 9 are provided along the bone main body 8 as shown in FIG. 2 (B).

As shown in FIGS. 2 and 3, the bone body 8 is
Fitting holes 12 and 13 that open to face each other are formed in the block portions 10 and 11 provided at both ends, and a bone portion 14 that extends between the pair of block portions 10 and 11 is formed in a groove shape in cross section. As a result, a holding groove 15 communicating with the fitting holes 12 and 13 is formed.

In the illustrated embodiment in which the ribs 3 of the folded umbrella are constituted by the umbrella ribs 7, the block portion 10 at one end is a pivotal attachment portion provided with a shaft support hole for pivotally attaching the ribs 3 to the upper wheel 2. 16, and the block portion 11 at the other end constitutes a dowel portion 17 provided with a shaft supporting hole for pivotally connecting the lamina 3a in a reversible manner, and a holding groove at an axially intermediate portion of the bone main body 8. 15 is formed with bifurcated brackets 18 and 18 extending from both sides of the braces 15.
Is provided with a shaft support hole for pivotally connecting. At this time, on the inner side surfaces of the bifurcated brackets 18, 18, a locking portion 19 for making the groove opening of the holding groove 15 narrow is projected. As shown in FIG. 3D, the locking portion 19 is formed by molding the brackets 18, 18 so that the thickness of the brackets 18, 18 increases toward the inner side surface.

As shown in FIG. 2 (C), the pair of fitting holes 12 and 13 have guide openings 20 and 21 located on the opposite sides of the skeleton 14 and opening the opening edges in a notched shape. Is forming.

The bone main body 8 is injection-molded from a flexible synthetic resin to make the bone portion 14 flexible so that it can be freely bent. A synthetic resin reinforced by fibers such as glass fiber and carbon fiber may be used.

The reinforcing core 9 is held along the holding groove 15, and both ends of the reinforcing core 9 are fitted into the fitting holes 12 and 1.
3, and a linear or rod-shaped member having a length and an outer diameter such that the axially intermediate portion of the reinforcing core 9 is locked from the holding groove 15 to the locking portion 19. Consists of.

Therefore, the reinforcing core 9 is made of a steel wire such as a piano wire having an outer diameter which is held in the holding groove 15 and is inserted and held in the fitting holes 12 and 13, or glass fiber or carbon fiber. The extruded resin wire of the reinforced fiber-reinforced synthetic resin can be easily formed by cutting it into a predetermined length dimension. The reinforcing core 9 is used to reinforce the bone main body 8. However, the reinforcing core 9 is attached to the bone main body 8 so as to have an appropriate flexibility as a whole on the parachute bone 7 (main rib 3) formed. Therefore, it is preferable that the reinforcing core 9 has a spring property of having a spring force capable of being curved and restored in an arc shape.

In the illustrated embodiment, since the reinforcing core 9 is formed of a linear member having a circular cross section, the holding groove 15 is formed in an arc shape in cross section, and the fitting holes 12 and 13 are formed in a circular cross section. Although formed, the reinforcing core 9 can have not only a circular cross section but also a free cross sectional shape. In that case,
The holding groove 15 and the fitting holes 12 and 13 may be formed to have a cross-sectional shape along the cross-sectional shape of the reinforcing core 9.

As described above, since the bone portion 14 of the bone main body 8 is flexible, the both ends of the reinforcing core 9 are fitted into the fitting holes 12 and 13 by bending the bone portion 14 in an arc shape.
Can be inserted into. At this time, the fitting holes 12, 1
If the guide openings 20 and 21 are formed in 3, the reinforcing core 9
It becomes easy to fit both ends of the into the fitting holes 12 and 13.

Further, the reinforcing core 9 is pushed into the holding groove 15 from between the bifurcated brackets 18 and 18 at the axially middle portion thereof, and then passes through the locking portions 19 and 19 to the holding groove 15. 3D, the peripheral surface of the reinforcing core 9 is locked by the locking portions 19 and 19 from the inside of the holding groove 15 as shown in FIG.

The parasol bone 7 in which the reinforcing core 9 is attached to the bone body 8 is used by being incorporated in the framework of the parasol. In the case of the rib 3 in the illustrated embodiment, as shown in FIG. 1, it is incorporated as a rib of a folded western umbrella. Therefore, in the open state, the rib 3 is curved and deformed into an arc shape by the tension of the umbrella cloth or the like, but as shown in FIG. 3B, the pair of block portions 10 and 11 (the pivotal attachment portion 16 and the dowel). Between the parts 17), the bone body 8 and the reinforcing core 9 are preferably flexibly deformed. At this time, the bone main body 8 and the reinforcing core 9 are fitted into the fitting holes 12 and 13 at both ends.
And the interlocking portions 19 in the axially intermediate portions are connected and held to each other at three points, and the remaining portions are not connected and are merely laid along the non-fixed state. Can be flexibly deformed independently of each other, and as a result, flexural deformation under different radii of curvature is possible.

In the illustrated embodiment, the axially middle portion of the reinforcing core 9 is constrained by the locking portion 19 so as not to come off from the holding groove 15, but in the axial direction along the holding groove 15. It is not restricted and can be moved slightly. Further, both ends of the reinforcing core 9 are
A clearance is provided between the fitting holes 12 and 13 and the bottom of the fitting hole 12, and the reinforcing core 9 is held by the groove 15 corresponding to the clearance.
It is possible to freely move along. As a result, as shown in FIG. 3 (B), the bone main body 8 and the reinforcing core 9 are not only bendable under different radii of curvature, but also the reinforcing core 9 is fitted to the holding groove 15 of the bone main body 8. It enables flexural deformation along the way.

[0028]

According to the present invention as set forth in claim 1, the canopy bone 7 has a bone main body 8 formed in advance from a flexible synthetic resin, and a reinforcement provided along the bone main body 8. Since it is composed of the core 9, the bone main body 8 can be formed under a free shape by injection molding of synthetic resin, while the bone main body 8 is reinforced by the reinforcing core 9 and has excellent durability. Western umbrella 7
Is effective.

In particular, in the case of forming the umbrella bone by insert molding in which a reinforcing core is embedded, molding difficulties and
While the coating resin may be peeled off, according to the present invention, since the reinforcing core 9 is attached to the preformed bone main body 8, such a problem does not occur. Excellent in terms.

According to the second aspect of the present invention, at least both ends of the reinforcing core 9 are inserted and held in the fitting holes 12 and 13 of the bone main body 8, and the intermediate portion extending in the axial direction of the reinforcing core 9 is formed. Since the bone main body 8 is arranged along the non-fixed state, the bone main body 8 and the reinforcing core 9 can be freely flexibly deformed independently of each other when the umbrella is opened, and as a result, the radius of curvature is different. This has the effect of enabling flexural deformation below.

According to the third aspect of the present invention, the bone main body 8 is formed with the fitting holes 12 and 13 that open to the block portions 10 and 11 provided at both ends so as to face each other, and The holding portion 15 communicating with the fitting holes 12 and 13 is formed by forming the skeleton portion 14 extending between the block portions 10 and 11 in a groove shape in cross section.
Since it is configured to be held along the holding groove 15 and both ends of the reinforcing core 9 are inserted and held in the fitting holes 12 and 13, the reinforcing core 9 attached to the bone main body 8 is provided. Is suitably accommodated in the holding groove 15, and the appearance of the parachute bone 7 is not spoiled. Moreover, even when the bone main body 8 and the reinforcing core 9 are bent under different radii of curvature when the umbrella is opened, and the like, and the like, distortion occurs in the gap between the bone main body 8 and the reinforcing core 9, Since the peripheral surface of the reinforcing core 8 is hidden in the holding groove 15, there is an effect that the distortion generated in the gap is not exposed to the outside.

According to the fourth aspect of the present invention, the bone main body 8 forms the fitting holes 12 and 13 that open to the block portions 10 and 11 provided at both ends so as to face each other. The holding portion 15 communicating with the fitting hole is formed by forming the bone portion 14 extending between the block portions 10 and 11 in a groove shape in cross section, and further holding in the axial middle portion of the bone main body 8. Forming bifurcated brackets 18, 18 extending from both sides of the groove 15 for skeleton pivoting, a locking portion 19 for narrowing the groove opening of the holding groove 15 is formed on the inner surface of the bracket 18. The reinforcing core 9 is held along the holding groove 15 and both ends of the reinforcing core 9 are inserted and held in the fitting holes 12 and 13, respectively. The axial middle portion of the reinforcing core 9 is locked to the locking portion 19 from within the holding groove 15. Because it is because was configured, in addition to the above effects, it is possible to provide ribs 3 provided with a bifurcated bracket 18, the forked bracket 18, 18
With a simple configuration in which the locking portion 19 is formed on the ridge, the bone main body 8 and the reinforcing core 9 are integrally flexibly deformed when the parent bone 3 is curved and deformed when the umbrella is opened and the axial direction of the reinforcing core 9 is changed. There is an effect that it is possible to preferably prevent the midway portion from rising from the holding groove 15 of the bone main body 8.

[Brief description of drawings]

FIG. 1 is a front view showing a folded western umbrella, which is an example of a western umbrella assembled with an embodiment of the present invention, in an open state.

FIG. 2 shows a rib according to one embodiment of the present invention,
(A) is a cross-sectional view showing a disassembled state of a canopy bone, (B) is a front view showing a state in which a reinforcing core is attached to a bone main body, and (C) is a bottom view showing a state in which a reinforcing core is attached to a bone main body It is a figure.

FIG. 3 shows a rib according to one embodiment of the present invention,
(A) is a cross-sectional view of a rib, (B) is a cross-sectional view showing a state in which the rib is curved and deformed, (C) is a cross-sectional view taken along line XX of (A), and (D) is Y- of (A). It is a Y line sectional view.

[Explanation of symbols]

 3 Parent bones 7 Umbrella bones 8 Bone main bodies 9 Reinforcement cores 10 Block parts 11 Block parts 12 Fitting holes 13 Fitting holes 14 Bone parts 15 Holding grooves 16 Pivoting parts 17 Dowel parts 18 Bifurcated brackets 19 Locking parts

Claims (4)

[Claims] 1. A canopy bone comprising a bone main body formed in advance from a flexible synthetic resin, and a reinforcing core provided along the bone main body. 2. A bone main body preliminarily molded from a flexible synthetic resin, and a reinforcing core provided along the bone main body, and at least both ends of the reinforcing core are inserted into fitting holes of the bone main body. A canopy bone characterized in that it is held, and an intermediate part extending in the axial direction of the reinforcing core is laid along the bone main body in a non-fixed state. 3. A bone main body formed in advance from a flexible synthetic resin, and a reinforcing core extending along the bone main body, wherein the bone main body is opposed to block portions provided at both ends. While forming a fitting hole that opens, forming a holding groove that communicates with the fitting hole by forming a bone portion extending between the pair of block portions in a groove shape in cross section, the reinforcing core While being held along the holding groove,
A canopy bone characterized in that both ends of the reinforcing core are inserted and held in the fitting holes. 4. A rib having a bone main body preliminarily molded of a flexible synthetic resin and a reinforcing core extending along the bone main body, wherein the bone main body is mutually connected to block portions provided at both ends. And a holding groove communicating with the fitting hole is formed by forming a fitting hole that is opened to face to, and forming a bone portion that extends between the pair of block portions in a groove shape in cross section. A bifurcated bracket for skeleton pivoting is formed extending from both sides of the holding groove in an axially intermediate portion of the bone main body, and the groove opening of the holding groove is narrowed on the inner surface of the bracket. The reinforcing core is held along the holding groove, and
Both ends of the reinforcing core are inserted and held in the fitting holes, and further, an axial midway portion of the reinforcing core is locked from the holding groove to the locking portion, which is characterized in that .