JP2007209593A - Folding umbrella - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding umbrella, by which an outside diameter of a main body can be minimized in folding without a decrease of strength and useability, which is excellent in lightness and has greatly high productivity as well. <P>SOLUTION: The folding umbrella is provided with extensible ribs 1 and 1 as umbrella ribs for radially supporting a waterproof cloth and keeps each stretcher rib 1a and each folding rib 1b foldable at a hinge part J. At least each stretcher rib 1a in an inner side connected to an inside cap 3 on the top end of a handle shaft 2 of the umbrella consists of a channel-shaped fine rod formed of injection-molded plastics. A zigzag truss 12a is integrally formed in a space between channel-shaped trough walls 11a and 11a in the stretcher rib 1a consisting of the channel-shaped fine rod. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improved folding western umbrella, and more particularly, to a folding western umbrella that can be folded into a compact shape and that is excellent in light weight and toughness.

  As is well known, folding western umbrellas are made up of umbrella bones that can be folded and expanded. When not in use, folding umbrellas can be reduced to a compact form that is easy to carry. is there. The determination of the ease of portability of the folding western umbrella is mainly based on the lightness of the umbrella body and the ability to be stored in a bag, etc. In order to achieve excellent accommodation, the umbrella bone is folded. At that time, it is important that the umbrella body be as thin and small as possible.

  Therefore, conventionally, as in <Patent Document 1>, when using a fiber reinforced resin material for the umbrella bone, the weight is reduced, and when the umbrella bone is folded by making the cross section of the umbrella bone substantially triangular. A folding western umbrella is disclosed in which the thickness of the umbrella bone at the time of folding is reduced by configuring so that the aggregates are arranged in a parallelogram shape.

  However, with regard to the above-described prior art, since the aggregate cross section of the umbrella bone is triangular, the load applied from both ends of the umbrella bone and the connecting portion with the support bone is different from a general umbrella bone having a rectangular cross section. Depending on the orientation, large unevenness in toughness has occurred, and the mechanical strength of the umbrella bone has been reduced.

  On the other hand, in the case of making umbrella bones using a hard resin that is used for general purposes, in order to obtain stable strength, the umbrella bones had to be formed much thicker than usual, so the result Therefore, the outer diameter of the umbrella body at the time of folding could not be greatly reduced.

  Furthermore, if an attempt is made to integrally form a pivoted portion with respect to a shaft or a supporting bone and a connecting portion of aggregates to an umbrella bone having a triangular cross section, the umbrella bone becomes a very complicated shape. Molding was very difficult. On the other hand, when the above-mentioned pivotally attached portion and the connecting portion are formed of separate members, a manufacturing process for attaching these members to the umbrella bone is required, which has led to a reduction in manufacturing efficiency.

  Also, conventionally, folding umbrella bones are not adopted, aggregates with a U-shaped cross section are slidably connected, and umbrella bones that can store other aggregates inside the aggregate with the largest opposite side dimension are used. Therefore, a folding western umbrella that avoids the bulkiness of the umbrella bone caused by the folding of the aggregate has also been proposed (see, for example, Patent Document 2).

  However, the folding umbrella according to the above prior art has a serious problem in terms of function such that the slide mechanism does not operate normally even if the aggregate is slightly deformed under load.

In addition, the folding western umbrella in the prior art described above employs a sliding mechanism for the umbrella bone, so the umbrella cloth could not be always attached. It had to be installed on purpose, and it was not usable as an umbrella because it could not be used immediately.
JP 7-155216 A (page 2-3, FIGS. 1-3) Japanese Patent No. 3046570 (page 2-11, FIGS. 1-15)

  The present invention has been made in view of the above-described problems, and the object of the present invention is to reduce the outer diameter of the umbrella body when folded without causing a decrease in strength and a deterioration in usability. It is possible to provide a folding umbrella that can be manufactured, has excellent lightness, and has extremely high productivity.

  Means adopted by the present inventor for solving the above problems will be described with reference to the accompanying drawings.

  In other words, the present invention is a folding umbrella using an umbrella bone 1, 1,... Which can be folded and expanded at the hinge joint J as an umbrella bone that radially supports a waterproof raw cloth. Each inner bone 1a connected to the inside cap 3 at the upper end of the handle shaft 2 of the umbrella is composed of an injection-molded plastic channel rod, and this channel rod. A feature is that a zigzag truss 12a is integrally formed between the channel groove walls 11a and 11a of each original bone 1a.

  In addition, in the present invention, in order to solve the above-described problems, in addition to the above means, the fold bone 1b hinged by the inner bone 1a and the hinge joint J is also injection-molded as necessary. It is possible to adopt a technical means of integrally forming a zigzag truss 12b between the channel groove walls 11b and 11b of each foldable bone 1b made of the channel thin rod.

  Further, in the present invention, in order to solve the above-described problems, the hinge joint portion J of the umbrella bone 1 is folded with respect to the bearing portion 13a formed at one end of the original bone 1a in addition to the above means as necessary. It is possible to adopt a technical means in which a shaft part 13b formed at one end of the bone 1b is pivotally configured.

  In the present invention, in order to solve the above-described problem, in addition to the above means, a plurality of recesses 31, 31... A narrow groove 32 is formed on the periphery of the cap 3 by passing the recesses 31, 31..., While one end of the original bone 1 a provided with a locking hole 14 a is inserted into the recess 31 of the inside cap 3, Further, a linear member 33 is wound around the narrow groove 32 of the inside cap 3 in a state where the engaging hole 14a of each original bone 1a is inserted to constitute a rotating mechanism for the umbrella bones 1.1. Technical means can be adopted.

  In addition, in the present invention, in order to solve the above-described problems, in addition to the above-described means as necessary, as a plastic material used for the umbrella bone 1, a relatively hard and versatile high-density polyethylene (HDPE) is used. The technical means of adoption can be adopted.

  Further, in the present invention, in order to solve the above-described problems, a truss 12a provided on the original bone 1a of the umbrella bone 1 is formed inside the channel groove in addition to the above-described means as necessary. A technical means for allowing the support frame 4 to be accommodated in the channel groove when the frame is closed can be employed.

  In the present invention, the channel rod in which the zigzag truss is integrally formed between the groove walls is adopted for the umbrella bone, so that the load received from the both ends of the umbrella bone and the connecting portion of the support bone is distributed between the channel groove and the truss. Since it can be absorbed, an umbrella bone having a stable strength can be produced in a thinner shape. And since it becomes possible to reduce the thickness of the umbrella bone at the time of folding, the outer diameter of the umbrella main body at the time of folding can be reduced.

  In addition, in the above-mentioned means, normal hinge connection can be adopted for connection between the aggregates of the umbrella bones, so that there is no problem in usability.

  Furthermore, by using plastic for the material of the umbrella bone and making the shape a channel rod, the umbrella body can be made lighter and the umbrella body can be made lighter.

  In addition, since the umbrella bone can be easily manufactured by injection molding using a relatively tough plastic material, the manufacturing cost can be reduced and the manufacturing efficiency can be improved.

  Therefore, according to the present invention, it is possible to provide a folding umbrella that is excellent in functionality and can be stored in a compact manner, so that the practical utility value of the present invention is very high.

“First Embodiment”
First, a first embodiment of the present invention will be described with reference to FIGS. First, what is indicated by reference numeral 1 is a plastic umbrella bone, and what is indicated by reference numeral 2 is a handle shaft. And what is indicated by reference numeral 3 is an inside cap, and what is indicated by reference numeral 4 is a scapula. Next, what is indicated by reference numeral 5 is a sliding roll.

  Therefore, the configuration of this embodiment will be described below. First, an injection-molded plastic channel rod is used, and a zigzag truss 12a is integrally formed between the channel groove walls 11a and 11a of the channel rod to be connected to the handle shaft 2 side of the umbrella bone 1. The original bone 1a to be manufactured was prepared (see FIGS. 1 and 2).

  The original bone 1a was manufactured by injection molding of high-density polyethylene (HDPE), which is relatively hard and widely used.

  Then, a metal thin rod having a shaft portion 13b formed at one end is produced as a foldable bone 1b on the outer side of the umbrella bone, and the shaft portion 13b of the foldable bone 1b is formed at one end of the original bone 1a. The umbrella bone 1 can be folded and expanded so that the umbrella cloth C can be supported radially (see FIG. 3).

  For umbrella cloth C, if it is a rain umbrella, use a waterproof raw cloth made of a resin sheet such as nylon or polyester. Use highly decorative sheet material (woven fabric, etc.).

  The handle shaft uses a lightweight aluminum rod and a telescopic telescopic mechanism that can change the length of the shaft with a simple operation.

  In addition, a plurality of recesses 31 are arranged at the same interval at the lower peripheral edge of the inside cap 3 provided on the upper part of the handle shaft 2, and a narrow groove is provided at the peripheral edge of the inside cap 3. 32 was formed across the recesses 31. Then, the other end of the original bone 1a provided with the locking hole 14a is inserted into the recess 31 of the inside cap 3, and further, the engagement of each original bone 1a into the narrow groove 32 of the inside cap 3 is performed. A linear member 33 is wound around the hole 14a so as to constitute a rotating mechanism for the umbrella bones 1.1 (see FIG. 4).

  Then, in the middle region of the original bone 1 a, a pivotal support 15 for the support 4 was formed and one end of the support 4 was connected. Thereby, the sliding roll 5 to which the other end of the support frame is connected can open and close the umbrella bone 1 in conjunction with the vertical movement of the handle shaft 2.

  By configuring the whole as described above, the load received from the pivotal attachment portion 15a with both ends of the umbrella bone 1 and the support frame 4 can be dispersed and absorbed by the groove portion of the channel rod and the truss 12a. Umbrella bone 1 having can be produced in a thinner shape. And since it becomes possible to reduce the thickness of the umbrella bone 1 at the time of folding, the outer diameter of the umbrella main body at the time of folding can be reduced.

  In addition, in the above-described means, since the base bone 1a of the umbrella bone 1 and the foldable bone 1b are hinge-connected, there is no problem in usability.

  Furthermore, the plastic material is used for the material of the umbrella bone 1 and the shape thereof is a channel rod shape, so that the umbrella body 1 can be made lighter and the umbrella body can be made lighter and corroded like a metal material. I don't have to.

  Further, the umbrella bone 1 can be selected as long as it is a relatively tough plastic material, and can be easily manufactured by integral molding by injection molding, so that productivity can be improved.

  Moreover, in this embodiment, when the truss 12a provided in the original bone 1a of the umbrella bone 1 is formed inside the channel groove and the umbrella bone 1 is closed, the support bone 4 can be accommodated in the channel groove. did. Thereby, it is possible to avoid a situation in which the outer diameter of the umbrella body increases due to the presence of the support 4.

“Second Embodiment”
Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a plastic channel thin rod in which a zigzag truss 12b is formed between the channel groove walls 11b and 11b is also used for the fold bone 1b of the umbrella bone 1, and the original bone 1a of the umbrella bone 1 is adopted. And the flexibility gap between the fold bone 1b was eliminated. Thereby, when the umbrella cloth C is stretched around the umbrella bone 1, a smooth flow curve can be drawn (see FIGS. 5 and 6).

  Further, since the entire umbrella bone 1 is made of plastic, the manufacturing process can be simplified and the manufacturing efficiency can be improved.

  In the present embodiment, the channel rod trusses 12a and 12b are formed in a double zigzag shape intersecting in a rope shape, so that the toughness of the umbrella bone 1 is further improved.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the “Claims”. For material 1, not only high-density polyethylene (HDPE) but also polystyrene (PS), ABS resin (ABS), and polyvinyl chloride (PVC) are used as long as they are relatively hard and can be injection molded. It is also possible to use extremely tough engineering plastics (for example, PPS resin).

  Moreover, although the umbrella bone 1 in embodiment is a form which can be folded in a two-stage type, it is good also as a form which can be folded in a multistage type by hinge-connecting several folding bones 1b.

  Further, the bending angles of the trusses 12a and 12b provided on the umbrella bone 1 may be appropriately changed in consideration of required strength and ease of molding, and the shape may be a right triangle as shown in FIG. All belong to the technical scope of the present invention.

  In recent years, folding umbrellas are often used that can be kept on firewood or the like as a countermeasure against rainfall, and can be taken out and used when necessary. And in such a folding western umbrella, since portability when not in use is very important, manufacturers are also pursuing light weight and compactness. However, as a result of pursuing these performances, functional problems such as usability and strength occur in the umbrella body.

  Under such circumstances, the folding western umbrella of the present invention can realize the compactness of the umbrella body when not in use without impairing the usability as an umbrella, so the demand in the market is great, and the industrial utility value of the present invention Is very expensive.

It is a whole perspective view showing the umbrella bone in a 1st embodiment of the present invention. It is a partial top view showing the shape of the truss formed in the channel groove | channel of the original bone in 1st Embodiment of this invention. It is explanatory sectional drawing showing the folding umbrella in 1st Embodiment of this invention. It is an expansion perspective view showing the connection mechanism of the original bone and inside cap in 1st Embodiment of this invention. It is a fragmentary perspective view showing the umbrella bone in 2nd Embodiment of this invention. It is a partial top view showing the shape of the truss formed in the channel groove | channel of the umbrella bone in 2nd Embodiment of this invention. It is a partial top view showing the shape of the truss formed in the channel groove | channel of the umbrella bone in the modification of this invention.

Explanation of symbols

1 Umbrella bone 1a Original bone
11a Channel groove wall
12a truss
13a Bearing part
14a Locking hole
15a Pivot 1b Folding bone
11b Channel groove wall
12b truss
13b Shaft 2 Handle shaft 3 Inside cap
31 recess
32 narrow groove
33 Linear member 4 Spontane 5 Sliding roll C Umbrella cloth

Claims (6)

  A folding western umbrella using an umbrella bone 1, 1, which can be folded and expanded at the hinge joint J as an umbrella bone for radially supporting the umbrella cloth C, and at least the western umbrella Each inner bone 1a connected to the inside cap 3 at the upper end of the handle shaft 2 is made up of injection-molded plastic channel rods, and the channel in each bone 1a made of this channel rod. A strong and lightweight folding umbrella characterized in that a zigzag truss 12a is integrally formed between the groove walls 11a and 11a.   The foldable bone 1b hinged by the inner bone 1a and the hinge joint J is also an injection-molded plastic channel wand, and the channel groove in each foldbone 1b made of this channel wand. 2. The folding umbrella according to claim 1, wherein a zigzag truss 12b is integrally formed between the walls 11b and 11b.   The hinge joint portion J of the umbrella bone 1 is configured by pivotally attaching a shaft portion 13b formed at one end of the foldable bone 1b to a bearing portion 13a formed at one end of the original bone 1a. The folding western umbrella according to claim 1 or 2.   A plurality of recesses 31, 31 are arranged at the same interval at the lower peripheral edge of the inside cap 3, and a narrow groove 32 is formed on the periphery of the inside cap 3 across the recesses 31, 31 ... One end of the original bone 1a provided with the locking hole 14a is inserted into the recess 31 of the inside cap 3, and the engagement hole of each original bone 1a is inserted into the narrow groove 32 of the inside cap 3. The folding member according to any one of claims 1 to 3, wherein a linear member 33 is wound in a state of being inserted through 14a to constitute a rotating mechanism of the umbrella bones 1.1. Western umbrella.   The folding western umbrella according to any one of claims 1 to 4, wherein the plastic material used for the umbrella bone 1 is a relatively hard and versatile high-density polyethylene (HDPE). .   The truss 12a provided in the original bone 1a of the umbrella bone 1 is formed inside the channel groove, and when the umbrella bone 1 is closed, the support bone 4 can be accommodated in the channel groove. The folding western umbrella as described in any one of claim | item 1 -5.

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