JPH0130315Y2 - - Google Patents

Description

[Detailed description of the invention] This invention supports a front fork in a freely rotatable manner on a bicycle handlebar, more specifically, on a head pipe fixed to the bicycle frame, and on the front fork,
A handle device for fixing a bar holder having a holding part for holding the central part of a handlebar, which has a central part extending in a substantially horizontal direction and rising parts extending vertically upward from both sides of the central part. Regarding.

Generally, in a bicycle, the front fork's fork stem is inserted into the head pipe, and a ball pusher having a ball receiving surface is placed between the upper and lower ends of the head pipe and the fork stem, and a ball facing the ball receiving surface. An upper bearing and a lower bearing are provided, each consisting of a bowl having a receiving surface and a ball interposed between the ball receiving surfaces, and a rotation preventing washer is provided on the upper part of the ball pusher constituting the bearing in the upper bearing. Further, the front fork is rotatably supported on the head pipe by screwing a lock nut from the top of the anti-rotation washer, and the handle stem supporting the handle is inserted into the fork stem of the front fork. The handle stem is fixed to the Hawk stem by means of a fixing means consisting of a lifting head which is inserted and threadedly engaged with the expander bolt.

However, in the case of the above-mentioned structure, the use of detent washers, lock nuts, expander bolts, and lifters increases the height of the top surface of the handlebar stem, which not only worsens the stability of the bicycle. However, there was a problem in that the support of the object to be mounted on the top surface of the head pipe was unstable and uncertain.

The present invention was devised in view of the above problems, and its purpose is to improve the stability of the bicycle by lowering the height of the top surface of the bar holder that holds the handlebar, while also improving the stability of the bicycle. When supporting an object to be worn above the body, such as a shopping cart,
To provide a handle device whose support can be made stable and reliable.

That is, in the present invention, a front fork is rotatably supported on a head pipe fixed to a bicycle frame, and the front fork has a central portion extending substantially horizontally and an upright portion extending vertically upward from both sides of the central portion. A handle device for fixing a bar holder having a holding portion for holding the center portion of the handlebar, the center portion of the handlebar not protruding from the upper surface of the top of the bar holder. At the same time, a fixing part is provided on one side of the bar holder, the width dimension is larger than the outer diameter of the front fork, and the fixing part fixes the bar holder to the front fork. the top surface is flush with the top top surface of the bar holder;
and the shopping basket is fixed to the front fork through a mounting body that does not protrude upwardly relative to the upper surface, and is attached to the upper surface of the top of the holding portion and the fixed portion above the bar holder. The front fork is characterized by forming a receiving surface that is long and wider than the outer diameter of the front fork, and that supports an attached object such as the front fork.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The handle device of the present invention will be described below based on embodiments shown in the drawings.

The illustrated handle device is attached to a down tube D of a frame of a minicycle vehicle, and 1 is the down tube D.
A cylindrical head pipe fixed to the upper end, 21 is a Hawk stem of the front fork 2, and between the upper and lower ends of the Hawk stem 21 and the head pipe 1, there is a ball pusher 71 having ball receiving surfaces 71a, 81a, 81, and bowls 72, 82 having ball receiving surfaces 72a, 82a opposite to the ball receiving surfaces 71a, 81a.
and between the ball receiving surfaces 71a and 72a and between 81a and 8
The front fork 2 is rotatably supported on the head pipe 1 by providing an upper bearing 7 and a lower bearing 8 consisting of balls 73 and 83 interposed between the front fork 2a.

Further, a bar holder 4 having a holding portion 4a of the handlebar 3 is fixed to the hawk stem 21 of the front fork 2.

Specifically, the front fork 2 has an extension part 22 extending from the upper part of the hawk stem 21.
Further, a screw portion 23 is provided on the upper outer periphery of the Hawk stem 21, and an engagement groove 24 extending along the length direction of the Hawk stem 21 is provided on one side of the upper portion of the Hawk stem 21. ,
In a bar holder 4 having a holding part 4a for holding the handlebar 3, the bar holder 4 has a width dimension larger than the outer diameter of the front fork 2 on one side of the bar holder 4. 4 to the front fork 2, and an engagement groove 24 provided in the fork stem 21 at the center of the fixing part 4b and on one side of the inside of the fixing part 4b.
A fitting hole 5 is formed which has an engaging protrusion 6 that engages with the bar holder 4 and into which the bar holder 4 can be inserted into the extension portion 22 without relative rotation.

Then, a fitting hole 5 formed in the fixing part 4b of the bar holder 4 is inserted into the extension part 22, and a nut or the like is used to lock the fixing part 4b of the bar holder 4 into the extension part 22 by screw means. By screwing together the locking member 9 consisting of
The bar holder 4 is fixed to.

Note that 9a is an engagement hole that engages with a handle (not shown) formed in the lock member 9 for rotating the lock member 9.

The bar holder 4 is formed into a thick plate shape, and a bar holder 4a of the bar holder 4 is provided with a bar holder hole 10 that passes through the bar holder 4 in the horizontal direction. Attachment holes 11, 11 are vertically bored in the bar holder 4, and the handlebar 3 to be held in the bar holder hole 10 is divided vertically from the bar holder 10 portion. They are clamped and fixed by tightening the tightening screws 12, 12 inserted into the holes 11.

Also, the bowl 72 of the upper bearing 7 and the lower bearing 8,
82 is formed into a cylindrical shape having the ball receiving surfaces 72a, 82a on the inner circumferential surface of one end and annular flanges 72b, 82b on the outer circumferential surface of the other end, as shown in FIG. , 82a is inserted into the inner peripheral surface of both ends of the head pipe 1 with the side ends facing inward, and the ball pusher 71 of the upper bearing 7 is a screw provided on the outer periphery of the upper end of the hawk stem 21 of the front fork 2. The ball pusher 81 of the lower bearing 8 is inserted into the outer peripheral surface of the base of the Hawk stem 21.

Further, the fixing part 4b of the bar holder 4 is provided with a recessed part 4c to accommodate the locking member 9,
When the lock member 9 is screwed into the extension portion 22,
The locking member 9 is housed in the recess 4c so that the top surface of the bar holder 4 becomes a horizontal surface, and the top surface of the bar holder 4 is provided with a groove as shown in FIG. , the object A to be attached, such as a shopping cart, is to be attached.

The present invention has the above-mentioned configuration. First, the fork stem 21 of the front fork 2 is inserted into the head pipe 1, and the front fork 2 is inserted into the head pipe 1 by the upper bearing 7 and the lower bearing 8. rotatably supported against the
Further, from the upper part of the ball pusher 71 constituting the upper bearing 7, an engagement protrusion 6 in the engagement hole 5 provided in the bar holder 4 is inserted into the engagement groove 24 formed in the extension part 22 of the front fork 2. The fitting hole 5 of the bar holder 4 is inserted into the extension part 22 so that the bar holder 4 is engaged with the extension part 22, and then the lock member 9 is screwed into the extension part 22 to fix the bar holder 4. The portion 4 is fixed to the extension portion 22.

Therefore, the engagement protrusion 6 engaged with the engagement groove 24
This makes it impossible for the bar holder 4 to rotate relative to the front fork 2, and the operation of the handle 3 held on the bar holder 4 is reliably transmitted to the front fork 2.

Moreover, as described above, by fitting the fitting hole 6 of the bar holder 4 into the extension part 22 so as not to be relatively rotatable, and by screwing the locking member 9 into the extension part 22, the ball pusher can be pressed. 71 is securely fixed. In other words, the ball pusher 71 can be fixed without using a locking washer or a lock nut as in the conventional case, and the bar can be fixed without using an expander bolt or a lifting screw. Since the holder can be fixed, the height of the top surface of the bar holder 4 above the ground can be significantly lower than the height of the grip section of the handlebar 3 above the ground, and the height of the top surface of the bar holder 4 can be significantly lower than the height of the grip section of the handlebar 3 above the ground. It is possible to support the attached object A supported at a low position, which not only further improves the stability of the bicycle, but also reduces the number of parts in the handle device, reducing the weight and cost of the vehicle. In addition, since the supporting surface of the object to be mounted can be made significantly wider and a horizontal surface, the object to be mounted can be supported more stably and reliably.

The object to be attached may be fixed to the handlebar 3 through a fixing device, but as shown in FIG. A plurality of extending grooves 50 are formed, a plurality of bolt holes 51 are provided, and the aggregate of an object to be attached, such as a shopping cart, is fitted into the grooves 50, and a flat holding plate is used to screw the material into the bolt holes 51. It may also be configured to be attached using a fixed bolt.

In addition, the height of the top surface of the bar holder 4 above the ground is 700 mm or less when the wheel diameter is 23.5 inches or 24 inches, or the height of the top surface of the bar holder 4 from the upper end of the wheel (not shown) is 700 mm or less. It is preferable that the height is 170 mm or less.

Further, the interval between the lower ends of the raised parts of the handle 3 is around 300 mm (preferably 270 mm), the length of the raised parts is 300 mm to 400 mm (preferably 360 mm), and the interval between the upper ends of the raised parts is 350 mm to 430 mm (preferably
400mm) is preferable.

In the embodiment described above, the locking member 9 is screwed into the threaded portion 23 formed on the extension portion 22.
The bar holder 4 is locked to the front fork 2, and as shown in FIG. 6, a lock member 30 is formed with a hexagonal hole 30a formed on its upper surface and a screw body 30b provided on its lower surface. On the other hand,
By fixing a threaded body 31 inside the hawk stem 21 of the front fork 2 and screwing the threaded body 30b provided on the locking member 30 into the threaded body 31, the bar holder 4 can be attached to the bar holder 4. It may be possible to lock it to the front fork 2.

Further, as shown in FIG. 7, a plan view 50 is formed on the side of the extension part 22, and an engagement hole 50 that engages with the flat part 50 of the extension part 22 is provided in the fitting hole 5 of the bar holder 4. A mating portion 5a may be formed, and the engagement of the flat portion 50 with the engaging portion 5a may disable relative rotation of the bar holder 4 with respect to the extension portion 22.

Furthermore, in the embodiments shown in FIGS. 2 and 6, the upper bearing 7 is directly held down by the bar holder 4, but as shown in FIG.
A washer 40 may be interposed between the bar holder 4 and the upper bearing 7, and a chrysanthemum as shown in FIG. The upper bearing 7 may be indirectly held down by the bar holder 4 by forming seating surfaces 40a, 71a and preventing rotation by engagement of these seating surfaces 40a, 71a. good.

As described above, the present invention can lower the height above the ground of the bar holder to which a so-called U-shaped handlebar is attached, so that when an object to be attached, such as a shopping cart, is attached to the receiving surface, the object to be attached can be The handlebar can be supported at a low height relative to the ground, and the running stability of the bicycle can therefore be further improved. At the same time, a fixing part is provided on one side of the bar holder, the width dimension of which is larger than the outer diameter of the front fork, and which fixes the bar holder to the front fork. is flush with the top upper surface of the bar holder, and the fixed part is fixed to the front fork via a mounting body that does not protrude from the top surface, and the Since the length of the bar holder is long to support the object to be attached, such as a shopping cart, and the receiving surface is wider than the outer diameter of the front fork, it is easier to support the object to be attached, such as the shopping cart. Stable and reliable support is also possible.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted perspective view showing an embodiment of the handle device of the present invention, Fig. 2 is a partially omitted enlarged longitudinal sectional side view, Fig. 3 is a sectional view taken along the line - - in Fig. 2, and Fig. 4 is a partially omitted enlarged longitudinal sectional view. 2 is a sectional view taken along the line 2, FIG. 5 is a plan view of the bar holder, FIG. 6 is a partially omitted enlarged vertical sectional side view showing another embodiment, and FIG. 7 is a partially omitted partially omitted side view showing another embodiment. FIG. 8 is a partially omitted enlarged longitudinal sectional side view showing another embodiment, and FIG. 9 is an enlarged exploded perspective view of the main part of another embodiment. 1...Head pipe, 2...Front hawk,
3... Handlebar, 4... Bar holder, 9...
Lock member, 22...extension part.

Claims (1)

[Scope of utility model registration request] A front fork stem is rotatably supported on a head pipe fixed to the bicycle frame, and the front fork has a center portion extending in a substantially horizontal direction and a stand extending vertically upward from both ends of the center portion. A handlebar device for fixing a bar holder having a holding portion for holding the center portion of the handlebar, the center portion of the handlebar being fixed to the upper surface of the top of the bar holder. A fixing member for holding the bar holder in a non-protruding manner, having a widthwise dimension larger than the outer diameter of the hawk stem of the front fork, and fixing the bar holder to the hawk stem of the front fork, on one side of the bar holder. The upper surface of the fixed portion is flush with the upper surface of the top of the bar holder, and the fixed portion is attached to the hawk stem of the front fork via a mounting body that does not protrude upward with respect to the upper surface. The bar holder has a long length and supports an object to be attached, such as a shopping cart, which is fixed to the upper surface of the top of the holding part and the fixing part, and which is attached to the upper surface of the bar holder.
A bicycle handlebar device, characterized in that a receiving surface is formed that is wider than the outer diameter of the hawk stem of the front fork.