JPH0126259Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a Western umbrella, and particularly to a Western umbrella made of synthetic resin bones.

[Conventional technology]

Traditionally, Western umbrellas have been equipped with a fixed potter's wheel that is fixed to the center rod and a sliding potter's wheel that can freely slide on the center rod. It is well known that the tip of the support rib is pivotally attached to a bracket material provided in the middle of the rib, but all conventional umbrella ribs are made of metal, and especially the rib is made of metal. The bracket is made of a single piece made of aluminum, and the bracket material is fixed to the middle part of the bracket by caulking or the like. The support bones are also made of metal.
It's authentic.

[Problem that the invention attempts to solve]

As mentioned above, in conventional Western umbrellas, both the main ribs and the supporting ribs are made of metal and are made of one piece, so the length of the main rib and the supporting bones must be set to a predetermined size according to the predetermined dimensions of the umbrella rib. It is produced as.

However, there are several predetermined lengths of the umbrella rib, and in this case, the lengths of the main rib and the support bones are also varied. Therefore, the use of the main ribs and supporting ribs in the conventional umbrellas is limited to those of the intended dimensions.
It has the disadvantage that it is not versatile for use with umbrella ribs of different sizes.

Regarding this point, the present inventor divided the main rib into a base rib and a pre-rib, obtained these by cutting a long material made of synthetic resin into predetermined dimensions, and divided the proximal rib and pre-rib into a propulsion bone. By connecting the base ribs with a pivoting bracket material and fixing a pivoting tool pivotally attached to a sliding potter's wheel to the base end of the base rib, the base rib can be formed in length and width freely. We have learned that it is possible to provide long materials made of synthetic resin with versatility. It has also been discovered that productivity can be improved by opening insertion holes at both ends of a synthetic resin bracket material and inserting each bone into the insertion holes as a means of connecting the base rib and the leading rib. I got it.

However, Western umbrellas using this standard outer rib,
As a result of experiments, when the umbrella cloth is tensed and the main rib is curved when the umbrella is opened, stress is concentrated at the insertion end of the first main rib, and the bracket material located at the insertion end is easily destroyed. I found out. In order to eliminate this drawback, for example, the bracket material may be made thicker to make it stronger, but in that case, the bracket material as a whole becomes larger in size, and in particular, the outer diameter becomes larger. Not only does it not look good, but there is also the problem that when the umbrella is closed, the bundle of bones becomes bulky.

[Means for solving problems]

As a result of repeated research to solve the above problem, the inventor of the present invention found that the reason why the bracket material is easily destroyed is due to the elastic restoring force of the leading rib and the shear stress generated in the bracket material. .

In other words, since the proximal end of the leading rib is only held by the bracket material and the distal end is free, the elastic restoring force when the leading rib is greatly curved due to the tension of the umbrella cloth when the umbrella is opened is It has a large effect on the insertion end of the proximal bone into the bracket. On the other hand, the bracket itself is supported by the struts at pivot points with the struts. Therefore, when the insertion end of the proximal rib and the pivot point of the bracket material are provided with a gap in the axial direction, shear stress is generated in the bracket material in the space between them. Parts are easily sheared.

Therefore, in the present invention, when inserting the proximal end of the leading rib into the insertion hole of the bracket material, the insertion end of the leading rib is inserted past the pivot point between the bracket material and the supporting bone of the bracket material. By positioning and fixing the proximal end, the above problem can be solved.

Therefore, the features of the present invention include a fixed potter's wheel that is fixed to the center rod and a sliding potter's wheel that is slidable on the center rod, and the proximal end of the main rib is pivotally attached to the fixed potter's wheel, and the In a Western umbrella in which the proximal end of a support bone is pivoted to a potter's wheel, and the tip of the support bone is pivoted to a bracket material provided in the middle of the main bone: the main bone has a circular cross section cut to a predetermined length. It is divided into a base rib and a tip rib made of a synthetic resin rod, and a pivot is provided at the proximal end of the base rib to be pivoted to a fixed potter's wheel, and the outer shape of the pivot is formed into a square cross section. ; The bracket material pivots the tip of the support bone to a cylindrical portion having an insertion hole for the base rib on the proximal end side in the axial direction, and a tube portion having an insertion hole for the tip rib on the distal end side. A bracket part is integrally molded of synthetic resin, and the outer shape of the cylindrical part is formed into a rectangular shape. The pivot point for pivotally supporting the supporting bone of the bracket material is provided at a position away from the insertion end surface of the proximal rib toward the distal end side of the bracket material in the axial direction.

〔Example〕

Hereinafter, one embodiment of the present invention applied to a folding umbrella will be described in detail based on the drawings.

(Basic configuration of a Western umbrella) Figure 1 shows the open state of a Western umbrella.
An upper potter's wheel (fixed potter's wheel) 2 is fixed near the upper end, and a lower potter's wheel 3 (sliding potter's wheel) that is slidable in the axial direction on the outer periphery of the center bar 1 is equipped at the midpoint of the middle bar 1. has been done. The middle rod 1 is configured to be extendable and contractible as is known for folding umbrellas, and is preferably formed into a tube shape made of glass fiber, and a carbon fiber layer is laminated and integrated on the surface of the tube body of the glass fiber. is desirable. A proximal end of a master rib 4 is pivotally attached to the upper potter's wheel 2. The lower potter's wheel 3
A proximal end of a support bone 5 is pivotally attached to the support member 5, and a tip end of the support member 5 is pivotally attached to a bracket member 6 provided in the middle of the main rib 4.

The rib 4 is divided into a base rib 4a and a leading rib 4b, and further divided into a tip rib 4c extending to the tip of the leading rib 4b. The abutting ends of the base rib 4a and the leading rib 4b are connected by the bracket material 6, and the butting ends of the leading rib 4b and the leading rib 4c are connected by a bending tool 7 so as to be freely bendable. A pivot 8, which is pivotally attached to the upper potter's wheel 2, is fixed to the base end of the base rib 4a, and a tip 9 is fixed to the tip of the tip rib 4b.

The support bone 5 has a pivot 10 fixedly attached to the lower potter's wheel 3 at its base end, and a pivot 11 pivotably attached to the bracket material 6 at its tip end.

The middle rod 1 is provided with an upper locking pawl 12 and a lower locking pawl (not shown), which can be moved in and out at different positions in the circumferential direction. It is locked by the upper locking pawl 12, and the locking hole 13 of the lower potter's wheel 3 is locked by the lower locking pawl when the umbrella is closed.

An umbrella cloth (not shown) is stretched over the main rib 4.

(Configuration of the main rib) The base rib 4a that constitutes the main rib 4 and the proximal rib 4
b and the tip rib 4c are both synthetic resin rods cut into predetermined lengths, and preferably an extruded material made of reinforced plastic such as glass fiber is used as the synthetic resin rod. In the case of the folding umbrella according to the illustrated embodiment, the base rib 4a and the tip rib 4b have the same diameter, but have a relatively large cross-sectional diameter (for example, 3.5 mm in diameter).
On the other hand, the tip rib 4c has a relatively small cross-sectional diameter (for example, 3 mm in diameter). The bracket member 6 connecting the abutting ends of the base rib 4a and the leading rib 4b is preferably formed in a cylindrical shape as shown in the second figure, and the base rib 4a is connected to the base rib 4a on the proximal end side in the axial direction.
A cylindrical part with an insertion hole 6a for the leading rib 4b, a cylindrical part with an insertion hole 6b for the proximal rib 4b on the distal end side, and a bifurcated bracket part 6c extending downward from the distal end part of the cylindrical part on the distal end side. This is integrally molded from a synthetic resin, preferably by injection molding from a resin material made by mixing a small amount of glass fiber with Diuracon material (copolymerized polyacetal).

The pivot tool 8 fixed to the proximal end of the base rib 4a includes a cylindrical portion 8a into which the base rib 4a is inserted, and the cylindrical portion 8
A thinner tongue piece 8b protrudes from the tongue piece a, and is integrally molded from the same synthetic resin material as the bracket material 6. The thin tongue piece 8b is inserted into the vertical groove of the upper potter's wheel 2, and a wire rod (not shown) wound around the circumferential groove of the upper potter's wheel 2 is inserted into the pivot hole 8c.
It is pivoted to the upper potter's wheel 2. Therefore, the cylindrical portion 8a
is a thick portion that is wider than the tongue piece 8b.

The cylindrical portion of the bracket material 6 and the pivot support 8
Each of the cylindrical parts 8a preferably has a substantially square cross-sectional outer shape, while the internal hole has a circular cross-section along the cross-section of each bone, and the fitting protrusion is located on the diagonal of the square. It is preferable that the hole protrudes from the inner surface along the axial direction of the hole. In this case, the base rib 4a
Both of the leading ribs 4b are made of cut long bars with a circular cross section that match the holes, and are fixed in the holes via the protrusions by forcibly inserting the bars into the holes. has been done. However, it goes without saying that the outer diameter of the entire rod may be larger than the hole diameter, and only the end portion of the rod inserted into the hole may be processed to match the hole diameter.

A bending tool 7 that connects the leading rib 4b and the leading rib 4c
In addition to the one shown in the third figure, all of the above bracket materials 6
It consists of a fixing part 7a and a bending part 7b molded from the same material as the fixing part 7a. Protrusions 17 and 18 are provided that engage with each other in a state where 7b is positioned in a straight line with respect to the fixed part 7a (FIG. 4),
The tip of the leading rib 4b is inserted into the cylindrical part of the fixed part 7a, the proximal end of the leading rib 4c is inserted into the cylindrical part of the bent part 7b, and the shaft is inserted into the insertion hole of both cylindrical parts. It is similar to the above-mentioned bracket material and pivot tool 8 that a directional protrusion is formed. A sewing thread insertion hole 7c is formed in the cylindrical lower surface of the fixed part 7a, and is used for attaching the umbrella cloth.

The tip 9 fixed to the tip of the tip rib 4c is made of a suitable synthetic resin material, has a cylindrical hole into which the tip of the tip rib 4c is inserted as shown in Figure 5, and has a fitting protrusion similar to the above. A strip is provided protruding from the inner periphery of the cylindrical hole, and a dew bead 19 is formed at the tip of the dew point 9.
A thread insertion hole 20 is formed in the middle.

(Structure of Strut) The strut 5 is made by cutting a long rod made of a resin material to a predetermined length and having the same diameter cross section as the tip main rib 4c and made of the same material. Therefore, it is possible to obtain the tip main rib 4c and the support rib 5 at the same time by cutting the same long bar. However, if it is desired that the support bone 5 has a large cross-sectional diameter, the base rib 4a and the proximal rib 4b may be
It may also be formed by cutting a long bar material with a large diameter, which is used for.

As shown in FIG. 2, pivot tools 10 and 11 are fixed to both ends of the support bone 5.
and 11b, a pivot hole is opened in the tongue piece, and a protrusion is provided in the cylindrical hole, which has the same structure as the above-mentioned main rib pivot device 8. However, in the illustrated example in which the support bone 5 is made of a rod with a small cross-sectional diameter, both pivot supports 1
0 and 11 are formed to be similar in size to the pivot 8 of the main rib. The support 8 is used as the pivot support 10 for the support bone 5.
and 11). In addition, the outer diameter of the entire rod is larger than the hole diameter of the cylindrical part of the pivot,
Of course, only the end portion of the rod inserted into the hole may be processed to match the hole diameter.

Tongue piece 1 of pivot tool 11 fixed to the tip of support bone 5
1b is a bracket portion 6c of the bracket material 6;
, and is pivotally connected via a pivot pin 21.

On the other hand, the tongue piece 10b of the pivot tool 10 fixed to the base end of the support bone 5 is inserted into the vertical groove of the lower wheel 3, and pivots a wire rod (not shown) wound around the circumferential groove of the lower wheel 3. It is pivotally attached to the lower potter's wheel 3 by passing through the support hole. The cylindrical portion 10a of this pivot 10 is a thick portion that is wider than the tongue piece 10b.

(Assembling the main rib and support rib) In the above embodiment, the main rib 4 is constructed by cutting a long synthetic resin bar into a predetermined length.
and the leading rib 4b are obtained, and the leading rib 4c and the supporting bone 5 are as follows.
Similarly, it can be obtained by cutting a long synthetic resin rod into a predetermined length. For each bone thus obtained, the base rib 4a and the leading rib 4b are inserted and fitted into the cylindrical part of the bracket material 6, and the pivot tool 8 is attached to the proximal end of the base rib 4a. Insert and fit the cylindrical portion 8a. Further, the tip of the proximal rib 4b is inserted and fitted into the fixing part 7a of the refracting tool 7, and the base end of the proximal rib 4c is inserted into the fixing part 7a of the refracting tool 7.
The tip of the tip rib 7c is inserted and fitted into the tip 9 of the tip. Also, cylinder portions 10a and 11a of pivots 10 and 11 are provided at both ends of the support bone 5, respectively.
By inserting and fitting, the support bone 5 is completed. After that, the pivot 8 of the main rib 4 is pivoted to the upper potter's wheel 2, the pivot tool 10 of the support bone 5 is pivoted to the lower potter's wheel 3,
Further, by pivotally attaching the pivot 11 of the support frame 5 to the bracket portion 6c of the bracket member 6, a frame structure of a folding western umbrella is obtained.

By the way, as for the frame of a Western umbrella, the predetermined lengths of the main rib 4 and the supporting ribs 5 are various depending on the dimensions. 4b, tip rib 4c,
Since the support bones 5 are all formed by cutting synthetic resin rods into predetermined lengths, various types of bones with different sizes can be created by cutting the same or multiple synthetic resin rods into appropriate predetermined dimensions. Moreover, it is sufficient to assemble the pivot tool and the bracket material 6, which are common members for bones of various sizes. Therefore, the umbrella frame structure is extremely convenient for mass production. Moreover, if the synthetic resin rods constituting the main rib 4 and the support ribs 5 have a circular cross-section as in the embodiment, there is no need to troubleshoot the positioning of the rods in the circumferential direction during the assembly, and furthermore, the circular cross-section If the external shape of each pivot and bracket material for the bar material is made into a rectangular cross section, there is an advantage that the work of inserting and fitting the bar material into the pivot tool and the bracket material can be easily mechanized.

In other words, when the pivot and the bracket have a rectangular cross section, for example, one end of the bar may be mechanically moved while one of the corner faces of the pivot is fixed on one side of the bar in the axial direction. After inserting and fitting the bracket into the base, slide the pivot together with the bar onto the base while fixing one of the corner faces of the bracket onto the base on the other axial side of the bar. The other end can be mechanically inserted and fitted into the insertion hole of the bracket material. Furthermore, in this case, the attached pivot tool and the bracket material can be accurately placed in a predetermined position without being displaced from each other. In other words, the pivot hole 8c of the pivot tool 8 and the pin 21 of the bracket portion 6c
The mounting holes can be mounted in a predetermined direction without being offset from each other.

Furthermore, in the present invention, as shown in the second figure, when inserting the proximal end of the proximal rib 4b into the insertion hole 6b of the bracket material 6, the bracket portion 6c of the bracket material 6 is inserted.
A pivot point (pin) 21 of the support bone 5 provided in the bracket member 5 is located further away from the insertion end surface of the proximal rib 4b inserted into the insertion hole 6b toward the distal end side of the bracket member 6 in the axial direction. It is formed like this. Therefore, as will be described later, it is possible to suitably prevent the possibility that the bracket material 6 will be destroyed when the umbrella is opened.

(Function) In the western umbrella of the above embodiment, when the umbrella is opened, the umbrella cloth is tensed and the main rib 4 is curved. Therefore, the leading rib 4b is in a free state along with the leading leading rib 4c on its distal end side, and the elastic restoring force of the curved leading leading rib 4b and leading leading rib 4c acts greatly on the insertion hole 6b of the bracket material 6. .

Regarding this point, as shown in the comparative example shown in Figure 7,
When the bracket material B inserts the base rib 4a and the tip rib 4b from both ends, the insertion end E of the tip rib 4b and the pivot point P with the support bone 5 are arranged with an interval in the axial direction. When the front rib 4b acts on the elastic force in the direction shown by the chain line in the same figure, a shearing force is generated between the insertion end E and the pivot point P, which makes it easy to remove the bracket material B. There is a risk that it will be destroyed.

In contrast, in the present invention, as described above, the support bone 5 provided on the bracket portion 6c of the bracket material 6 is
The pivot point (pin) 21 is formed to be located further away from the insertion end surface of the proximal rib 4b inserted into the insertion hole 6b toward the distal end side of the bracket material 6 in the axial direction. , no shearing force as described above is applied. Tensile stress acts between the insertion end of the leading rib 4b and the pivot point (pin) 21 of the support bone 5, but this tensile stress can be sufficiently withstood as long as the strength of the pin 21 is maintained. Therefore, accidents such as those in the above comparative example could be prevented.

Incidentally, when the umbrella is closed, the main rib 4 is suitably folded via the bending tool 7, and the support ribs 5 are expanded and suitably folded with respect to the main rib 4, as shown in the sixth figure. On this occasion,
If the bracket material 6 does not have a cylindrical portion on the distal end side with respect to the bracket part 6c, the pivot tool 11 of the support bone 5 will not interfere with the bracket material 6, and the support bone 5 and the proximal rib 4b will be connected to each other. The bones are in close contact with each other, and the folded and focused bones are not bulky, resulting in a beautiful appearance and a compact folded state.

In the above embodiments, the present invention was applied to a folding Western umbrella, but it goes without saying that the present invention can also be applied to a regular long umbrella or an automatic opening type long umbrella.

[Effect of idea]

As a result of the above-described structure, the present invention has a structure in which a long material made of synthetic resin is cut into a predetermined size to obtain a base rib and a leading rib, and the abutting ends of both bones are connected by a bracket material. By cutting a long resin material into predetermined dimensions, there is an advantage that ribs of different lengths and short lengths can be produced very easily.

In addition, the pivot point (pin) of the supporting bone provided in the bracket part of the bracket material is moved away from the insertion end surface of the leading rib inserted into the insertion hole of the cylindrical part in the axial direction toward the distal end side of the bracket material. Since the bracket material is formed so as to be located at the same position, no shearing force is generated in the bracket material due to the elastic restoring force of the leading rib, and therefore, it is excellent in that it can suitably prevent accidents in which the bracket material is destroyed. .

Furthermore, the outer shape of the pivot tool provided at the proximal end of the base rib was formed to have a square cross section, and the outer shape of the cylindrical portions at both axial ends of the bracket material to connect the base rib and the leading rib were formed to be square. Therefore, when sequentially attaching the pivot tool and the bracket material to the base rib, the pivot tool, the bracket material, and the base rib can be positioned relative to each other in the circumferential direction based on the respective corner surfaces. Even though the main rib is made of a synthetic resin rod with a circular cross section, the pivot tool and the bracket material can be placed in a predetermined position without shifting in the circumferential direction after being attached to both ends of the main rib. This has the effect that the rods can be placed accurately, and that the work of inserting the rods into the pivot and bracket members can be easily mechanized.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an open state of a western umbrella according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view showing the main parts, Fig. 3 is an enlarged sectional view showing the bending device, and Fig. 4 is Figure 3 is an enlarged cross-sectional view taken along the - line, Figure 5 is a cross-sectional view of the dew tip, Figure 6 is an enlarged cross-sectional view showing the folded state, and Figure 7 is an enlarged cross-sectional view showing the folded state.
The figure is an explanatory diagram showing a comparative example. 1... Middle stick, 2... Upper potter's wheel (fixed potter's wheel),
3... Lower potter's wheel (sliding potter's wheel), 4... Main rib, 4
a...Base rib, 4b... Tip rib, 4c... Tip rib, 5... Support bone, 6... Bracket material, 6a, 6
b...Insertion hole, 6c...Bracket part, 8,1
0, 11... Pivot, 21... Pin (pivot point).

Claims (1)

[Claims for Utility Model Registration] A fixed potter's wheel fixed to a center rod and a sliding potter's wheel that can freely slide on the center rod, the proximal end of the master rib is pivotally attached to the fixed potter's wheel, and the supporting bone is attached to the sliding potter's wheel. In a Western umbrella in which the base end is pivoted and the tip of the support rib is pivoted to a bracket material provided in the middle of the main rib: The main rib 4 is a synthetic resin rod with a circular cross section cut to a predetermined length. It is divided into a base rib 4a and a tip rib 4b made of wood, and a pivot 8 which is pivotally attached to the fixed wheel 2 is provided at the base end of the base rib, and the outer shape of the pivot is square in cross section. ; The bracket material 6 includes a cylindrical portion having an insertion hole 6a for the base rib on the proximal end side in the axial direction, a cylindrical portion having an insertion hole 6b for the proximal rib on the distal end side, and the tip of the support bone 5. Bracket portion 6 for pivotally mounting the
c by integral molding of synthetic resin, and the outer shape of the cylindrical portion is formed into a square shape; the abutting ends of the base rib and the tip rib are inserted into the respective insertion holes 6a and 6b of the bracket material. In this state, the pivot point 21 for pivotally supporting the support bone of the bracket material is provided at a position away from the insertion end surface of the proximal rib 4b toward the distal end side of the bracket material 6 in the axial direction. Western umbrella.