JPH07190024A - Pipe end mounting structure, and handle end mounting structure using the same - Google Patents

Abstract

PURPOSE:To provide a mounting structure for mounting an unspecified member on a pipe end part. CONSTITUTION:The outside end surface 2c of a first cylindrical member capable of being inserted into a pipe 1 and having a diameter slightly smaller than the pipe bore diameter is constituted by an inclined surface, and a second cylindrical member 3A capable of being inserted into the pipe 1 and having a slightly than the pipe 1 bore diameter is integrally formed on a weight 3 to be mounted on the pipe end part. The end surface 3C on the insert side to the pipe 1 of the second cylindrical member 3A is constituted by an reversely inclined surface to the end surface 2c of the first cylindrical member 2, and the first cylindrical member 2 and the second cylindrical member 3A are screwed together by a mounting bolt 4 in such a manner as to be mutually approached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment structure for attaching a desired member to an end portion of a pipe, and a handle end member (for example, a vibration-proof weight or the like) for a handle of a motorcycle using this attachment structure. Member) is attached to the handle end attachment structure.

[0002]

2. Description of the Related Art In recent years, antivibration measures have been taken in all fields. In particular, there are various anti-vibration measures to be applied to vehicles.

As one of them, vibration damping weights (handle end members) are fixed to both ends of the handle of the motorcycle for the purpose of vibration damping of the handle.

Conventionally, when attaching the above-mentioned anti-vibration weight to the end of the handle, a nut 6 having a cylindrical outer peripheral surface is inserted to a predetermined position inside the end of the handle 1 as shown in FIG. At that position, the corner portion on the outer end side of the nut 6 is fixed to the inner peripheral surface of the pipe 1 by welding, and the weight 3 is screwed to the fixed nut 6 from the outside with a mounting bolt 4 to remove the weight 3. I'm wearing it. As a prior art of this kind, there is Jitsukai Sho 59-91985.

[0005]

However, in the case of the above-described conventional attachment structure, since the nut is fixed inside the pipe by welding, the mounting position accuracy cannot be obtained. It becomes necessary, and as a result, it raises the manufacturing cost. In addition, it takes time and labor to position the nut in the pipe, and the welding is performed in a narrow space surrounded by a metal, so the workability is lowered, and the manufacturing cost is also reduced in this respect. Will be raised. Furthermore, since the welded portion projects between the nut and the inner peripheral surface of the pipe as described above, and the above-mentioned projected dimension is not uniquely determined by the nature of welding, the corresponding portion of the weight is unnecessarily excessive. It is necessary to perform chamfering, etc., which is a factor that increases the manufacturing cost due to extra machining.

Furthermore, when welding work is involved in the attachment of the weights, the welding equipment must be arranged at the weight attachment position, and the production line cannot be changed freely, which increases the flexibility of the production equipment. descend.
This is a big problem in the present situation where the production of various kinds in small quantities is inevitable due to the diversification of consumer demand.

The present invention has been made in view of the above circumstances, and it is a first object of the present invention to provide an attachment structure for attaching an unspecified member to an end of a pipe without using welding means.
Secondly, it is an object of the present invention to provide a handle end attachment structure for a motorcycle using this attachment structure.

[0008]

A pipe end attachment structure according to the first aspect of the present invention is a pipe end attachment structure for attaching a desired pipe end member to an open pipe end, wherein The first cylindrical member that is insertable and has a diameter slightly smaller than the inner diameter of the pipe has an outer end surface that is an inclined surface, and that can be inserted into the pipe end member that is to be attached to the end of the pipe and that is smaller than the inner diameter of the pipe. A second columnar member having a slightly smaller diameter is integrally formed, and an end face of the second columnar member on the side of insertion into a pipe is constituted by an end face of the first columnar member and an inclined surface reverse to that of the first columnar member. It is characterized in that the second columnar members are screwed to each other so as to be close to each other.

In the first aspect of the invention, since the mounting bolt is used for screwing, a female screw hole is formed in the shaft core portion of the first columnar member and the shaft core portion of the second columnar member is formed. A through hole having a diameter larger than the outer diameter of the mounting bolt screwed into the female screw hole and penetrating to the surface of the pipe end member on the side opposite to the pipe end is formed, and the through hole is formed from the side opposite to the pipe end of the pipe end member. It is also possible to attach the pipe end member to the pipe end by screwing the mounting bolt into the female threaded hole through.

Further, in the first aspect of the present invention, if a non-threaded hole portion having a diameter larger than the diameter of the root of the female screw is formed in the outer portion of the female screw hole, the mounting bolt is screwed into the female screw hole. Can be done smoothly.

Further, in the first aspect of the present invention, the slope of the outer end surface of the first cylindrical member and the slope of the opposite end surface of the second cylindrical member both have an equal angle of 45 ° or less, or If it is configured with the reverse inclined surface, the proximity operation by the mounting bolt between the end surface of the first cylindrical member and the end surface of the second cylindrical member can be smoothly performed.

The handle end attaching structure according to the second aspect of the present invention is a handle end attaching structure for attaching a desired member to an opening of the pipe end portion of a pipe that constitutes a handle. The first cylindrical member that is insertable and has a diameter slightly smaller than the inner diameter of the pipe has an outer end surface that is an inclined surface, and that can be inserted into the pipe end member that is to be attached to the end of the pipe A second columnar member having a slightly smaller diameter is integrally formed, and an end face of the second columnar member on the side of insertion into a pipe is constituted by an end face of the first columnar member and an inclined surface reverse to that of the first columnar member. It is characterized in that the second columnar members are screwed to each other so as to be close to each other.

Further, in the second aspect of the invention, since the mounting bolt is screwed, a female screw hole is formed in the shaft core portion of the first columnar member, and the shaft core portion of the second columnar member is formed. A through hole having a diameter larger than the outer diameter of the mounting bolt screwed into the female screw hole and penetrating to the surface of the pipe end member on the side opposite to the pipe end is formed, and the through hole is formed from the side opposite to the pipe end of the pipe end member. It is also possible to attach the handle end member to the handle end by screwing the mounting bolt into the female screw hole via the above.

Further, in the second aspect of the present invention, the slope of the outer end face of the first cylindrical member and the slope of the opposite end face of the second cylindrical member both have an equal angle of 45 ° or less, or If it is configured with the reverse inclined surface, the proximity operation by the mounting bolt between the end surface of the first cylindrical member and the end surface of the second cylindrical member can be smoothly performed.

In the second aspect of the invention, the pipe end member may be a vibration damping weight.

In the present specification, the columnar member means
This means a concept including a cylindrical member. In the case of a cylindrical member, the inclined surface and the reverse inclined surface may be formed by attaching a plate material to the cylindrical end surface.

[0017]

According to the pump end attachment structure according to the first aspect of the present invention, the first cylinder member and the second cylinder member are attached to each other by the mounting bolts so that the slope of the first cylinder member and the second cylinder member are separated from each other. The reverse slanted surface is lightly joined, and in this state, the first columnar member and the second columnar member are inserted inside from the opening of the pipe. Then, if the mounting bolt is further screwed into the female thread, the first and second slanted surfaces that are in contact with each other on the reverse slanted surface
The columnar member and the second columnar member cause the fastening force to be amplified by the wedge action of both the inclined surface, the reverse inclined surface, and the screw (screw engagement), causing a relative large offset (eccentricity). It moves and pushes to the opposite side of the inner peripheral surface of the pipe. As a result, the inner peripheral surface of the pipe and the outer peripheral surface of the first cylindrical member and their positions are
The inner peripheral surface of the pipe on the opposite side of 80 ° and the outer peripheral surface of the second columnar member are in firm contact with each other, so that the pipe end member is securely fixed to the inner peripheral surface of the pipe.

In this state, the mounting bolt is elastically deformed in the axial direction due to the above-mentioned screwing. Therefore, the elastic force always causes the first columnar member and the second columnar member to be more firmly joined to each other. Force acts to contribute to maintain the attachment state.

The handle end attachment structure according to the second aspect of the present invention also operates basically in the same manner as the first aspect of the present invention. That is, the first cylinder member and the second cylinder member of the handle end member are lightly joined to each other by the mounting bolts to attach the slope of the first cylinder member and the reverse slope of the second cylinder member,
In this state, the first columnar member and the second columnar member are inserted inside from the opening of the pipe. Then, if the mounting bolt is further screwed, the first columnar member and the second columnar member which are in contact with each other on the sloped surface and the reverse slanted surface are connected to both the slanted surface, the reverse slanted surface and the screw (screw). Due to the wedge action, the fastening force is amplified and a large force causes relative misalignment (eccentricity), which causes the inner peripheral surface side of the pipes to move and press on opposite sides. The outer peripheral surface of the first cylindrical member and its position
The inner peripheral surface of the pipe on the opposite side of 180 ° firmly contacts the outer peripheral surface of the second columnar member, and the handle end member is securely fixed to the inner peripheral surface of the pipe, that is, the handle.

In this state, the mounting bolt is elastically deformed in the axial direction due to the above-mentioned screwing. Therefore, the elastic force always causes the first columnar member and the second columnar member to be more firmly joined to each other. Force acts to contribute to maintain the attachment state.

[0021]

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

FIG. 1 (a) is an overall perspective view showing a handle end attachment structure of a motorcycle according to an embodiment of the present invention, and FIG.
Is a side view showing the configuration of a weight (handle end member) having a second columnar member, FIG. 3 is a side view showing the configuration of the first columnar member, and FIG. 4 is a side view showing the configuration of the left handle pipe. .

In FIG. 1 (a), 1 is a handle made of pipe, and an end 1A of the handle 1 is open. Also,
2 is a first columnar member, and the outer diameter D2 (see FIG. 3) of the first columnar member 2 is the inner diameter D of the pipe constituting the handle 1.
It has a slightly smaller diameter than 1 (see Fig. 4). 3 is a vibration-proof weight (handle end member) having a second columnar member 3A at the right end, and the outer diameter D3 (see FIG. 2) of the second columnar member 3A is the inner diameter D1 ( Figure 4
(See) It has a slightly smaller diameter. Specifically, as shown in FIGS. 2 to 4, the inner diameter D1 of the pipe of the handle 1 is 16 mm, and the outer diameter D2 of the first cylindrical member 2 is 1 mm.
The outer diameter D3 of the second columnar member 3A is set to 5.6 mm and 15.6 mm.

Further, as shown in FIG. 1 (a) or FIG. 3, the outer end surface (the left end surface in FIG. 1 (a)) 2c of the first cylindrical member 2 is a slope having an angle of about 35 °. It is composed of. The axis of the first columnar member 2 (center)
Has a penetrating female screw hole 2a formed therein.
The female screw hole is on the outside (left side in Fig. 1 (a)) end of the
A guide hole 2b having a diameter larger than the diameter of the valley of 2a is formed. Unlike this embodiment, this guide hole 2b is provided on the outside (left side in FIG. 1 (a)) to facilitate insertion of the mounting bolt 4.
Alternatively, a tapered hole having a larger diameter may be used.

On the other hand, the end surface (right end surface in FIG. 1 (a)) 3c of the second cylindrical member 3A on the insertion side is, as shown in FIG. 1 (a) or FIG. It consists of a reverse slope with an angle of about 35 °, which is equal to the angle of the slope. And, in the axial center (center) of the second cylindrical member 3,
A through hole 3B is formed so as to penetrate to the surface of the anti-vibration weight 3 on the side opposite to the pipe end (the left end in FIG. 1 (a)). The through hole 3B has an inner diameter d3 (see FIG. 2) larger than the outer diameter D4 of the mounting bolt 4 for screwing the weight 3 to the first columnar member 2. That is, the outer diameter D of the mounting bolt 4
4 and the inner diameter d3 (see FIG. 2) of the through hole 3B are the misalignment (eccentricity) dimensions of the first cylindrical member 2 and the second cylindrical member 3A. In the case of this embodiment, the mounting bolt 4 The outer diameter D4 is 8 mm, while the inner diameter d3 of the through hole 3B is 9 mm. Further, since the head portion 4A of the mounting bolt 4 of FIG. 1 (a) is embedded in the outer side portion (the left side portion in FIG. 2) of the through hole 3B, a large-diameter accommodating portion 3d is formed.

Further, in this embodiment, the pipe inner peripheral surface 1f of the handle 1, the outer peripheral surface 2f of the first cylindrical member 2 and the outer peripheral surface of the second cylindrical member 3A are mounted so that the contact area is increased and the mounting is made firmer. Both surfaces 3f are configured as smooth finished surfaces (specifically, the surface of a polished steel surface or more finished surfaces). In this embodiment, the smooth finished surface is used as described above. However, in the case of a cast product, the required attachment strength can be obtained even in the state where the die is cut.

In terms of material, the handle 1 is made of aluminum, and the weight 3 integrated with the first columnar member 2 and the second columnar member 3A is made of steel.

By the way, as described above, the angles of the inclined surface and the reverse inclined surface are formed to be 35 ° in this embodiment, but theoretically, if there is an angle, a component force is generated on the inner peripheral surface of the pipe. Therefore, the present invention is established, but in reality, it is desirable that the angle is about 30 to 40 °, and the practically possible angle is about 20 to 50 °.
Note that this angle range is an effective value for a handle pipe, and changes depending on the pipe diameter, finish, material, shape of the inner surface of the pipe, and so on.

According to the present handle end attachment structure thus constructed, the weight as the handle end member can be attached as follows.

That is, when attaching the antivibration weight 3 to the end 1A of the handle 1, first, as shown in FIG. 1 (a), the first cylindrical member 2 is attached to the pipe 1 before being inserted into the pipe 1. To the through hole 3B that is open to the outside of the weight 3 (left side in Fig. 1 (a)) while the second columnar member 3A is inclined with respect to each other and the reverse inclined surfaces (end surface 2c, end surface 3c) are in loose contact. The mounting bolt 4 is inserted, and the male screw portion of the tip thereof is screwed into the female screw of the first columnar member 2. At this time, as described above, the female screw hole 2a
Since the large diameter guide hole 2b is formed on the outer side of the, the mounting bolt 4 can be easily inserted. As described above, if the guide hole 2b is formed as a taper hole having an expanded diameter on the outside, or the tip of the mounting bolt 4 is tapered at the tip, the configuration becomes easier to insert.

Then, in the above state, the first columnar member 2 and the second columnar member 3A are inserted from the opening of the end 1A of the pipe 1,
The weight 3 is inserted until the stepped portion formed to have a large diameter contacts the end surface of the pipe 1, and after the insertion, the mounting bolt 4 is further screwed.

Due to this further screwing, the first columnar member 2 and the second columnar member 3A, which are initially in the substantially concentric state and are in contact with each other on the inclined surface and the reverse inclined surface, as shown by the two-dot chain line in FIG. First
The second columnar member 3A is relatively decentered (eccentric) with respect to the columnar member 2, the first columnar member 2 presses the lower surface of the inner peripheral surface of the pipe 1 downward, and the second columnar member 3A The upper surface of the inner peripheral surface of the pipe 1 is pressed upward.

As a result, the first columnar member 2 and the second columnar member 3A are firmly pressure-bonded to the inner peripheral surface of the pipe, and the weight 3 is firmly fixed to the end of the handle 1 by this pressure-bonding. This crimping is performed by the inner peripheral surface of the pipe as in the present embodiment.
If the outer peripheral surfaces of the first columnar member 2 and the second columnar member 3A are each formed of a smooth finished surface, the contact area increases, and the surface becomes stronger.

In the above embodiment, the case where the weight is attached to the end of the handle has been described. However, as shown in FIG. 5, the case where the rearview mirror 7 is attached to the end 1A of the handle 1 is described. Needless to say, the present invention can be applied.

By the way, in the above embodiment, both the inclined surface of the end surface 2c of the first cylindrical member 2 and the reverse inclined surface of the end surface 3c of the second cylindrical member 3A are formed at an angle of 35 °. Different angles may be used in close proximity. For example, even if the inclined surface of the end surface 2c of the first cylindrical member 2 is formed at 30 ° and the reverse inclined surface of the end surface 3c of the second cylindrical member 3A is formed at 35 °, the same operational effect as in the case of the above-described embodiment is obtained. Can be played.

In the above embodiment, the female thread hole is formed in the first columnar member 2 and the through hole 3B larger than the outer diameter D of the mounting bolt 4 is formed in the second columnar member 3A. Instead, as shown in FIG. 1 (b), the mounting bolts 4 are integrally planted in the first columnar member 2 and the second columnar member 3A is used.
To form a through hole 3B larger than the outer diameter D of the mounting bolt 4,
Screw the nut 8 from the opening side on the outside of the through hole 3B,
It may be configured to operate as described above.

Further, instead of FIG. 1 (b), as shown in FIG. 1 (c), a through hole 2B, which is larger than the outer diameter of the mounting bolt D, is formed in the first column member 2 and the second column member 3A. The same structure can be obtained by forming 3B, inserting the mounting bolt 4 into these through holes 2B, 3B, and screwing the nut 8 into one of them.

By the way, also in the case of the constructions shown in FIGS. 1 (b) and 1 (c), the initial screwing of the first columnar member 2 and the second columnar member 3A is performed outside the handle. In terms of wearability (workability), no inconvenience occurs.

By the way, the above embodiment has been described for the case of being applied to the handle of the motorcycle, but not limited to the case of the motorcycle, in general, for attaching a desired pipe end, for example, a hook fitting or the like. Also, it can be carried out in exactly the same manner as in the above embodiment.

[0040]

As described above, according to the first and second aspects of the present invention, the desired end can be easily and firmly attached to the end of the pipe.

In the pipe, since the first columnar member and the second columnar member are attached to the pipe in a self-aligning manner, there is no need for difficult and time-consuming alignment as in the conventional case. .

Since it is not necessary to weld the pipe to the end of the pipe as in the conventional case, it can be performed at a position (place) where welding equipment is not provided, that is, without limitation of the place.

As a result, when it is applied to the attachment of the handle end member of the motorcycle, the manufacturing line can be easily changed, and it becomes possible to cope with a variety of small quantity production.

[Brief description of drawings]

FIG. 1 is a disassembled state (state before mounting) showing a handle end attachment structure of a motorcycle according to an embodiment of the present invention.
FIG. 3 (a), (b), (c) is an overall perspective view in FIG.

FIG. 2 is a side view showing a configuration of a weight (handle end member) having a second columnar member shown in FIG. 1 (a).

FIG. 3 is a side view showing a configuration of a first columnar member shown in FIG. 1 (a).

FIG. 4 is a side view in which the lower half of the structure of the pipe of the left handle is shown in cross-section, with the handle end mounting structure shown in FIG.

FIG. 5 is a perspective view showing an embodiment in which a rearview mirror is attached to an end portion of a handle.

FIG. 6 is an overall perspective view showing a conventional handle end attachment structure of a motorcycle.

[Explanation of symbols]

 1 ... Handle (pipe) D1 ... Handle inner diameter 2 ... First cylindrical member 2a ... Female screw hole 3 ... Weight (pipe end member) 3A ... Second cylindrical member 3B ... Through hole 4 ... Mounting bolt D4 ... Mounting bolt Outer diameter

Claims (8)

[Claims] 1. A pipe end attachment structure for attaching a desired pipe end member to an open pipe end, wherein the pipe end member is insertable into the pipe and is outside the first cylindrical member having a diameter slightly smaller than the pipe inner diameter. While configuring the end face with a slope,
A second end having a diameter slightly smaller than the inner diameter of the pipe which can be inserted into the pipe end member to be attached to the end portion of the pipe.
A columnar member is integrally formed, and an end face of the second columnar member on the side of insertion into the pipe is constituted by an inclined surface opposite to the end face of the first columnar member, and between the first columnar member and the second columnar member. A pipe end attachment structure characterized in that the two are screwed together by mounting bolts so that they are close to each other. 2. A female screw hole is formed in the shaft core portion of the first columnar member for screwing with the mounting bolt, and the female screw hole is screwed into the shaft core portion of the second columnar member. Forming a through hole having a diameter larger than the outer diameter of the mounting bolt and penetrating to the surface of the pipe end member on the side opposite to the pipe end, and from the side opposite to the pipe end of the pipe end member to the female screw hole through the through hole. By screwing the mounting bolt,
The pipe end attachment structure according to claim 1, wherein a pipe end member is attached to the pipe end. 3. The pipe end attachment structure according to claim 2, wherein a non-threaded hole portion having a diameter larger than a diameter of a root of the female screw is formed at an outer portion of the female screw hole. 4. A sloped surface of an outer end surface of the first cylindrical member,
The pipe end attachment structure according to claim 1, wherein the end surface of the second columnar member and the reverse inclined surface are both inclined surfaces or reverse inclined surfaces that are formed at an equal angle of 45 ° or less. 5. A handle end attachment structure for attaching a desired member to an opening at an end portion of a pipe constituting a handle, the handle end attachment structure being insertable into the pipe and having a diameter slightly smaller than an inside diameter of the pipe. 1 The outer end surface of the cylindrical member is formed as a slope,
A second end having a diameter slightly smaller than the inner diameter of the pipe which can be inserted into the pipe end member to be attached to the end portion of the pipe.
A columnar member is integrally formed, and an end face of the second columnar member on the side of insertion into the pipe is constituted by an inclined surface opposite to the end face of the first columnar member, and between the first columnar member and the second columnar member. The handle end attachment structure is characterized in that the two are screwed with a mounting bolt so as to be close to each other. 6. A female screw hole is formed in the shaft core portion of the first columnar member so that the mounting bolt is screwed, and the female screw hole is screwed into the shaft core portion of the second columnar member. Forming a through hole having a diameter larger than the outer diameter of the mounting bolt and penetrating to the surface of the pipe end member on the side opposite to the pipe end, and from the side opposite to the pipe end of the pipe end member to the female screw hole through the through hole. The handle end attachment structure according to claim 6, wherein the handle end member is attached to the handle end by screwing an attachment bolt. 7. An inclined surface of an outer end surface of the first cylindrical member,
7. The handle end attachment structure according to claim 6, wherein the end surface of the second columnar member and the reverse inclined surface are both inclined surfaces or reverse inclined surfaces having an equal angle of 45 ° or less. 8. The handle end attachment structure according to claim 4, wherein the pipe end member is a vibration damping weight.