JP3024391U - Bone-joint tool of folding umbrella - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To prevent the rattling, to maintain a stable state, and to improve the usability and durability by keeping the locking function of the front bone for a long time. SOLUTION: This is a bone joint tool 1 of a folding western umbrella in which a front bone 9 is rotatably and pivotally connected to the tip of a main rib 6, and the bone joint tool 1 is molded from a hard synthetic resin having elasticity to form a front bone. 9 is provided with a locking groove 12 that is fitted and locked when the umbrella is opened, and the minimum opening width of the groove 12 is made the same as or slightly narrower than the front bone width (or diameter).

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a bone joint device (commonly called a dowel) of a folding western umbrella.

[0002]

[Prior art]

 In general, as shown in FIG. 5, a folded western umbrella has a proximal end of a plurality of ribs 23 connected to an upper end lathe 22 of an expandable shaft tube 21, and a pivot portion at each intermediate portion of the ribs 23. The supporting bones 25 are connected to each other via the members 24, and the proximal ends of the respective leading bones 25 are rotatably and pivotally attached to the distal ends of the ribs 23 via the bone joints 26. The other end of the shaft is connected to a lower wheel 28 which is fitted onto the shaft tube 21 and slides, and a cloth (not shown) is stretched over the ribs 23 and the front bones 27 (Actual Publication No. 40-22506). See the bulletin).

Conventionally, the bone joint metal 26 is made of a metal plate, has a substantially boat shape as shown in FIGS. 6 and 7, and the base end of the front bone 27 is located between the side walls 28, 28 at the longitudinal middle portion thereof. It is inserted and foldably connected by a pivot pin 29 (eyelet), and locking projections 30 projecting inward are provided on both side walls 28 on the opposite side of the fixing portion 26A of the rib 23, and are opened. The front bone 27 is locked by the locking projection 30 when the umbrella is held (see, for example, Japanese Utility Model Publication No. 41-22903).

[0004]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, the contact between the front bone 27 and the locking projection 30 is point contact, and the interval between the locking projections 30 of the bone joint metal 26 is widened during use, so that the locking function is sufficiently exerted. There is a problem that the front bone 27 rattles to the left and right, and the fabric naturally flakes out between the locking projections 30 and the fabric is not stable, and the saddle stitch thread is easily displaced and easily cut. There is.

The present invention has been made in view of the above situation, and an object thereof is to exhibit the function of locking the front bone for a long period of time, without rattling, and with good usability. It is an object of the present invention to provide a bone joint device of a folding umbrella that has a high durability that can maintain a stable state and that can firmly and firmly tie a saddle stitch thread.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention takes the following technical means. That is, the present invention relates to a bone joint device of a folding western umbrella in which a front bone is pivotally connected to a tip of a main bone so as to be freely foldable, and the front bone is fitted and locked in the bone joint device when the umbrella is opened. The front bone locking groove is provided, and the minimum opening width of the locking groove is the same as or slightly narrower than the front bone width (claim 1).

[0007] Therefore, when the front bone is extended and inserted into the locking groove of the bone joint tool when the umbrella is opened, if the locking groove side wall is pushed by the front bone and enters the locking groove, at least Since the front bone is locked by the opening of the locking groove and is held in the locking groove, the front bone does not rattle and the locking function is exhibited for a long period of time. Do not escape from the locking groove of.

Further, the present invention is characterized in that the contact between the front bone and the locking groove is line or surface contact (claim 2). In this case, when the front bone is extended and locked when the umbrella is opened, there is no rattling in the vertical and horizontal directions, little wear and tear, and a stable locking function is exhibited for a long period of time. Furthermore, the present invention is characterized in that the joint device is provided with a saddle stitch thread insertion hole (claim 3). Therefore, when the umbrella fabric is fixed to the bone joint device with the saddle stitching thread, by passing the saddle stitching thread through the thread insertion hole, thread misalignment is eliminated, the thread can be firmly fixed at a predetermined position, and thread breakage does not occur.

[0009]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention. FIG. 4 is a schematic view of the frame structure of a folded western umbrella, in which the joint device 1 of the present invention is adopted. Reference numeral 2 is a pipe shaft, which is not shown in the drawing, but is expandable / contractible in the axial direction. An upper lathe 3 and a butt 4 are fixed to the upper end, and a hand (not shown) is attached to the lower end. Further, the lower wheel 5 is externally fitted so as to be vertically slidable.

The base wheels 6 are pivotally connected to the upper wheel 3 and the backbones 8 are connected to the respective intermediate portions of the ribs 6 via pivot members 7. Further, the bone joint tool 1 is fixed to the tip of the rib 6, and the front bone 9 is foldably and rotatably connected to the rib 6 via the bone joint tool 1. Further, the base ends of the fulcrums 8 are pivotally connected to the lower wheel 5.

As shown in FIGS. 1 to 3, the bone joint 1 is made of a hard synthetic resin having elasticity, has a substantially long blade shape in a side view, and has a rib attachment hole 10 at its proximal end. A grooved front bone mounting recess 11 and a front bone locking groove 12 that are parallel to the axis of the fitting hole 10 are provided in a communicating manner in a raised portion of the portion excluding the fitting hole 10. Fitting holes 14 and 14 of front bone connecting pins (eyelets may be used) 15 are provided in the left and right side walls 13 and 13 of the recess 11 so as to communicate with each other.

Further, the side of the concave portion 11 on which the ribs are fitted is a fitting or locking groove 16 for the ribs 9 at the time of folding so that the ribs 9 are parallel to the ribs 6. . Further, the space between both side walls 13 of the recess 11 is made equal to or slightly wider than the thickness of the flat connecting portion 9A at the proximal end of the front bone 9 so that the front bone 9 can be smoothly folded and rotated.

As shown in FIG. 3, the locking groove 12 of the bone joint device 1 has a substantially U-shaped cross section, and the minimum opening width W is the width of the front bone 9 (the front bone 9 is round). In the case of a rod, the diameter is narrower than D) so that the front bone 9 and the facing wall surface of the locking groove 12 come into surface (or line) contact, and the front bone 9 is sandwiched by the elasticity of both side walls 13. It has become. Therefore, when the umbrella is opened, the front bone 9 does not rattle up and down, right and left in the locking groove 12, and is stably retained.

A saddle stitch thread insertion hole 17 is provided below the rib attachment hole 10 of the bone joint tool 1 in parallel with the pin fitting hole 14 and in a penetrating manner, and the saddle stitch thread 18 is attached to the bone joint tool. It is tightly tied to No. 1 so that the umbrella fabric 19 does not shift. The open end edge of the locking groove 12 of the bone joint device 1 is chamfered so that the front bone 9 can be easily inserted. Further, like the locking groove 12, the locking groove 16 may also lock and fix the front bone 9 when the front bone is folded (shown by a two-dot chain line in FIG. 2).

The present invention is not limited to the above embodiment, and can be applied to a three-fold folding umbrella as well as a two-fold folding umbrella, and the design can be appropriately changed.

[0016]

[Effect of device]

 As described above, the present invention provides a bone joint tool of a folding umbrella that foldably and pivotally connects the tip bone to the tip of the rib, wherein the bone joint tool is made of a hard synthetic resin material having elasticity. The front bone is provided with a front bone locking groove into which the front bone is fitted and locked when the umbrella is opened, and the minimum opening width of the locking groove is the same as or slightly narrower than the front bone width. Therefore, the tip bone can be securely locked in the locking groove of the bone joint tool during extension, that is, when the umbrella is opened, and the locking function can be exhibited without rattling even after long-term use. There is no fluttering of the fabric, the stable state with good usability can be maintained, and the durability can be improved (Claim 1).

Further, according to the invention of claim 2, the contact between the leading bone and the locking groove is a line or surface contact, so that the leading bone is locked. In this case, it is possible to prevent rattling in the upper, lower, left, and right directions, reduce wear and tear, exhibit a stable locking function for a long period of time, and maintain a good open state. Further, according to the invention as set forth in claim 3, since the saddle stitch thread insertion hole is provided in the joint tool, the saddle stitch thread can be securely and firmly bound to the bone joint tool. There is no thread slippage, and thread breakage can be prevented, and flaps on the umbrella fabric can be prevented.

[Brief description of drawings]

FIG. 1 is a top plan view showing an embodiment of the present invention.

FIG. 2 is a front (side) view of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. 2;

FIG. 4 is a schematic side view showing a frame structure of a western umbrella adopting the present invention.

FIG. 5 is a schematic side view showing a frame structure of a general folding western umbrella.

FIG. 6 is a side view showing a conventional example.

7 is an upper plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bone and joint device 6 Parent bone 9 Precussion 12 Precussion locking groove 17 Saddle stitch thread insertion hole D Precussion width (diameter) W Minimum opening width of locking groove

Claims (3)

[Scope of utility model registration request] 1. A bone joint tool of a folding western umbrella in which a tip bone is rotatably and pivotally connected to a tip of a main rib so that the tip bone is fitted and locked to the bone joint tool when the umbrella is opened. A bone joint tool for a folded western umbrella, wherein a bone locking groove is provided, and the minimum opening width of the locking groove is the same as or slightly narrower than the front bone width. 2. The bone joint device for a folded umbrella as claimed in claim 1, wherein the contact between the front bone and the locking groove is line or surface contact. 3. The bone joint device for a folded western umbrella according to claim 1, wherein a saddle stitch thread insertion hole is provided in the bone joint device.